ref: 2bca91187cdc84f6e457262b5560ede37ebbadc9
author: qwx <qwx@sciops.net>
date: Sat Oct 15 10:28:25 EDT 2022
44100Hz signed LE 16-bit 2 channel output
--- /dev/null
+++ b/dr_wav.h
@@ -1,0 +1,8350 @@
+/*
+WAV audio loader and writer. Choice of public domain or MIT-0. See license statements at the end of this file.
+dr_wav - v0.13.7 - 2022-09-17
+
+David Reid - mackron@gmail.com
+
+GitHub: https://github.com/mackron/dr_libs
+*/
+
+/*
+Introduction
+============
+This is a single file library. To use it, do something like the following in one .c file.
+
+ ```c
+ #define DR_WAV_IMPLEMENTATION
+ #include "dr_wav.h"
+ ```
+
+You can then #include this file in other parts of the program as you would with any other header file. Do something like the following to read audio data:
+
+ ```c
+ drwav wav;
+ if (!drwav_init_file(&wav, "my_song.wav", NULL)) {+ // Error opening WAV file.
+ }
+
+ drwav_int32* pDecodedInterleavedPCMFrames = malloc(wav.totalPCMFrameCount * wav.channels * sizeof(drwav_int32));
+ size_t numberOfSamplesActuallyDecoded = drwav_read_pcm_frames_s32(&wav, wav.totalPCMFrameCount, pDecodedInterleavedPCMFrames);
+
+ ...
+
+ drwav_uninit(&wav);
+ ```
+
+If you just want to quickly open and read the audio data in a single operation you can do something like this:
+
+ ```c
+ unsigned int channels;
+ unsigned int sampleRate;
+ drwav_uint64 totalPCMFrameCount;
+ float* pSampleData = drwav_open_file_and_read_pcm_frames_f32("my_song.wav", &channels, &sampleRate, &totalPCMFrameCount, NULL);+ if (pSampleData == NULL) {+ // Error opening and reading WAV file.
+ }
+
+ ...
+
+ drwav_free(pSampleData, NULL);
+ ```
+
+The examples above use versions of the API that convert the audio data to a consistent format (32-bit signed PCM, in this case), but you can still output the
+audio data in its internal format (see notes below for supported formats):
+
+ ```c
+ size_t framesRead = drwav_read_pcm_frames(&wav, wav.totalPCMFrameCount, pDecodedInterleavedPCMFrames);
+ ```
+
+You can also read the raw bytes of audio data, which could be useful if dr_wav does not have native support for a particular data format:
+
+ ```c
+ size_t bytesRead = drwav_read_raw(&wav, bytesToRead, pRawDataBuffer);
+ ```
+
+dr_wav can also be used to output WAV files. This does not currently support compressed formats. To use this, look at `drwav_init_write()`,
+`drwav_init_file_write()`, etc. Use `drwav_write_pcm_frames()` to write samples, or `drwav_write_raw()` to write raw data in the "data" chunk.
+
+ ```c
+ drwav_data_format format;
+ format.container = drwav_container_riff; // <-- drwav_container_riff = normal WAV files, drwav_container_w64 = Sony Wave64.
+ format.format = DR_WAVE_FORMAT_PCM; // <-- Any of the DR_WAVE_FORMAT_* codes.
+ format.channels = 2;
+ format.sampleRate = 44100;
+ format.bitsPerSample = 16;
+ drwav_init_file_write(&wav, "data/recording.wav", &format, NULL);
+
+ ...
+
+ drwav_uint64 framesWritten = drwav_write_pcm_frames(pWav, frameCount, pSamples);
+ ```
+
+dr_wav has seamless support the Sony Wave64 format. The decoder will automatically detect it and it should Just Work without any manual intervention.
+
+
+Build Options
+=============
+#define these options before including this file.
+
+#define DR_WAV_NO_CONVERSION_API
+ Disables conversion APIs such as `drwav_read_pcm_frames_f32()` and `drwav_s16_to_f32()`.
+
+#define DR_WAV_NO_STDIO
+ Disables APIs that initialize a decoder from a file such as `drwav_init_file()`, `drwav_init_file_write()`, etc.
+
+#define DR_WAV_NO_WCHAR
+ Disables all functions ending with `_w`. Use this if your compiler does not provide wchar.h. Not required if DR_WAV_NO_STDIO is also defined.
+
+
+
+Notes
+=====
+- Samples are always interleaved.
+- The default read function does not do any data conversion. Use `drwav_read_pcm_frames_f32()`, `drwav_read_pcm_frames_s32()` and `drwav_read_pcm_frames_s16()`
+ to read and convert audio data to 32-bit floating point, signed 32-bit integer and signed 16-bit integer samples respectively. Tested and supported internal
+ formats include the following:
+ - Unsigned 8-bit PCM
+ - Signed 12-bit PCM
+ - Signed 16-bit PCM
+ - Signed 24-bit PCM
+ - Signed 32-bit PCM
+ - IEEE 32-bit floating point
+ - IEEE 64-bit floating point
+ - A-law and u-law
+ - Microsoft ADPCM
+ - IMA ADPCM (DVI, format code 0x11)
+- dr_wav will try to read the WAV file as best it can, even if it's not strictly conformant to the WAV format.
+*/
+
+#ifndef dr_wav_h
+#define dr_wav_h
+
+#ifdef __cplusplus
+extern "C" {+#endif
+
+#define DRWAV_STRINGIFY(x) #x
+#define DRWAV_XSTRINGIFY(x) DRWAV_STRINGIFY(x)
+
+#define DRWAV_VERSION_MAJOR 0
+#define DRWAV_VERSION_MINOR 13
+#define DRWAV_VERSION_REVISION 7
+#define DRWAV_VERSION_STRING DRWAV_XSTRINGIFY(DRWAV_VERSION_MAJOR) "." DRWAV_XSTRINGIFY(DRWAV_VERSION_MINOR) "." DRWAV_XSTRINGIFY(DRWAV_VERSION_REVISION)
+
+#include <stddef.h> /* For size_t. */
+
+/* Sized types. */
+typedef signed char drwav_int8;
+typedef unsigned char drwav_uint8;
+typedef signed short drwav_int16;
+typedef unsigned short drwav_uint16;
+typedef signed int drwav_int32;
+typedef unsigned int drwav_uint32;
+#if defined(_MSC_VER) && !defined(__clang__)
+ typedef signed __int64 drwav_int64;
+ typedef unsigned __int64 drwav_uint64;
+#else
+ #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
+ #pragma GCC diagnostic push
+ #pragma GCC diagnostic ignored "-Wlong-long"
+ #if defined(__clang__)
+ #pragma GCC diagnostic ignored "-Wc++11-long-long"
+ #endif
+ #endif
+ typedef signed long long drwav_int64;
+ typedef unsigned long long drwav_uint64;
+ #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
+ #pragma GCC diagnostic pop
+ #endif
+#endif
+#if defined(__LP64__) || defined(_WIN64) || (defined(__x86_64__) && !defined(__ILP32__)) || defined(_M_X64) || defined(__ia64) || defined (_M_IA64) || defined(__aarch64__) || defined(_M_ARM64) || defined(__powerpc64__)
+ typedef drwav_uint64 drwav_uintptr;
+#else
+ typedef drwav_uint32 drwav_uintptr;
+#endif
+typedef drwav_uint8 drwav_bool8;
+typedef drwav_uint32 drwav_bool32;
+#define DRWAV_TRUE 1
+#define DRWAV_FALSE 0
+
+#if !defined(DRWAV_API)
+ #if defined(DRWAV_DLL)
+ #if defined(_WIN32)
+ #define DRWAV_DLL_IMPORT __declspec(dllimport)
+ #define DRWAV_DLL_EXPORT __declspec(dllexport)
+ #define DRWAV_DLL_PRIVATE static
+ #else
+ #if defined(__GNUC__) && __GNUC__ >= 4
+ #define DRWAV_DLL_IMPORT __attribute__((visibility("default")))+ #define DRWAV_DLL_EXPORT __attribute__((visibility("default")))+ #define DRWAV_DLL_PRIVATE __attribute__((visibility("hidden")))+ #else
+ #define DRWAV_DLL_IMPORT
+ #define DRWAV_DLL_EXPORT
+ #define DRWAV_DLL_PRIVATE static
+ #endif
+ #endif
+
+ #if defined(DR_WAV_IMPLEMENTATION) || defined(DRWAV_IMPLEMENTATION)
+ #define DRWAV_API DRWAV_DLL_EXPORT
+ #else
+ #define DRWAV_API DRWAV_DLL_IMPORT
+ #endif
+ #define DRWAV_PRIVATE DRWAV_DLL_PRIVATE
+ #else
+ #define DRWAV_API extern
+ #define DRWAV_PRIVATE static
+ #endif
+#endif
+
+typedef drwav_int32 drwav_result;
+#define DRWAV_SUCCESS 0
+#define DRWAV_ERROR -1 /* A generic error. */
+#define DRWAV_INVALID_ARGS -2
+#define DRWAV_INVALID_OPERATION -3
+#define DRWAV_OUT_OF_MEMORY -4
+#define DRWAV_OUT_OF_RANGE -5
+#define DRWAV_ACCESS_DENIED -6
+#define DRWAV_DOES_NOT_EXIST -7
+#define DRWAV_ALREADY_EXISTS -8
+#define DRWAV_TOO_MANY_OPEN_FILES -9
+#define DRWAV_INVALID_FILE -10
+#define DRWAV_TOO_BIG -11
+#define DRWAV_PATH_TOO_LONG -12
+#define DRWAV_NAME_TOO_LONG -13
+#define DRWAV_NOT_DIRECTORY -14
+#define DRWAV_IS_DIRECTORY -15
+#define DRWAV_DIRECTORY_NOT_EMPTY -16
+#define DRWAV_END_OF_FILE -17
+#define DRWAV_NO_SPACE -18
+#define DRWAV_BUSY -19
+#define DRWAV_IO_ERROR -20
+#define DRWAV_INTERRUPT -21
+#define DRWAV_UNAVAILABLE -22
+#define DRWAV_ALREADY_IN_USE -23
+#define DRWAV_BAD_ADDRESS -24
+#define DRWAV_BAD_SEEK -25
+#define DRWAV_BAD_PIPE -26
+#define DRWAV_DEADLOCK -27
+#define DRWAV_TOO_MANY_LINKS -28
+#define DRWAV_NOT_IMPLEMENTED -29
+#define DRWAV_NO_MESSAGE -30
+#define DRWAV_BAD_MESSAGE -31
+#define DRWAV_NO_DATA_AVAILABLE -32
+#define DRWAV_INVALID_DATA -33
+#define DRWAV_TIMEOUT -34
+#define DRWAV_NO_NETWORK -35
+#define DRWAV_NOT_UNIQUE -36
+#define DRWAV_NOT_SOCKET -37
+#define DRWAV_NO_ADDRESS -38
+#define DRWAV_BAD_PROTOCOL -39
+#define DRWAV_PROTOCOL_UNAVAILABLE -40
+#define DRWAV_PROTOCOL_NOT_SUPPORTED -41
+#define DRWAV_PROTOCOL_FAMILY_NOT_SUPPORTED -42
+#define DRWAV_ADDRESS_FAMILY_NOT_SUPPORTED -43
+#define DRWAV_SOCKET_NOT_SUPPORTED -44
+#define DRWAV_CONNECTION_RESET -45
+#define DRWAV_ALREADY_CONNECTED -46
+#define DRWAV_NOT_CONNECTED -47
+#define DRWAV_CONNECTION_REFUSED -48
+#define DRWAV_NO_HOST -49
+#define DRWAV_IN_PROGRESS -50
+#define DRWAV_CANCELLED -51
+#define DRWAV_MEMORY_ALREADY_MAPPED -52
+#define DRWAV_AT_END -53
+
+/* Common data formats. */
+#define DR_WAVE_FORMAT_PCM 0x1
+#define DR_WAVE_FORMAT_ADPCM 0x2
+#define DR_WAVE_FORMAT_IEEE_FLOAT 0x3
+#define DR_WAVE_FORMAT_ALAW 0x6
+#define DR_WAVE_FORMAT_MULAW 0x7
+#define DR_WAVE_FORMAT_DVI_ADPCM 0x11
+#define DR_WAVE_FORMAT_EXTENSIBLE 0xFFFE
+
+/* Flags to pass into drwav_init_ex(), etc. */
+#define DRWAV_SEQUENTIAL 0x00000001
+
+DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision);
+DRWAV_API const char* drwav_version_string(void);
+
+typedef enum
+{+ drwav_seek_origin_start,
+ drwav_seek_origin_current
+} drwav_seek_origin;
+
+typedef enum
+{+ drwav_container_riff,
+ drwav_container_w64,
+ drwav_container_rf64
+} drwav_container;
+
+typedef struct
+{+ union
+ {+ drwav_uint8 fourcc[4];
+ drwav_uint8 guid[16];
+ } id;
+
+ /* The size in bytes of the chunk. */
+ drwav_uint64 sizeInBytes;
+
+ /*
+ RIFF = 2 byte alignment.
+ W64 = 8 byte alignment.
+ */
+ unsigned int paddingSize;
+} drwav_chunk_header;
+
+typedef struct
+{+ /*
+ The format tag exactly as specified in the wave file's "fmt" chunk. This can be used by applications
+ that require support for data formats not natively supported by dr_wav.
+ */
+ drwav_uint16 formatTag;
+
+ /* The number of channels making up the audio data. When this is set to 1 it is mono, 2 is stereo, etc. */
+ drwav_uint16 channels;
+
+ /* The sample rate. Usually set to something like 44100. */
+ drwav_uint32 sampleRate;
+
+ /* Average bytes per second. You probably don't need this, but it's left here for informational purposes. */
+ drwav_uint32 avgBytesPerSec;
+
+ /* Block align. This is equal to the number of channels * bytes per sample. */
+ drwav_uint16 blockAlign;
+
+ /* Bits per sample. */
+ drwav_uint16 bitsPerSample;
+
+ /* The size of the extended data. Only used internally for validation, but left here for informational purposes. */
+ drwav_uint16 extendedSize;
+
+ /*
+ The number of valid bits per sample. When <formatTag> is equal to WAVE_FORMAT_EXTENSIBLE, <bitsPerSample>
+ is always rounded up to the nearest multiple of 8. This variable contains information about exactly how
+ many bits are valid per sample. Mainly used for informational purposes.
+ */
+ drwav_uint16 validBitsPerSample;
+
+ /* The channel mask. Not used at the moment. */
+ drwav_uint32 channelMask;
+
+ /* The sub-format, exactly as specified by the wave file. */
+ drwav_uint8 subFormat[16];
+} drwav_fmt;
+
+DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT);
+
+
+/*
+Callback for when data is read. Return value is the number of bytes actually read.
+
+pUserData [in] The user data that was passed to drwav_init() and family.
+pBufferOut [out] The output buffer.
+bytesToRead [in] The number of bytes to read.
+
+Returns the number of bytes actually read.
+
+A return value of less than bytesToRead indicates the end of the stream. Do _not_ return from this callback until
+either the entire bytesToRead is filled or you have reached the end of the stream.
+*/
+typedef size_t (* drwav_read_proc)(void* pUserData, void* pBufferOut, size_t bytesToRead);
+
+/*
+Callback for when data is written. Returns value is the number of bytes actually written.
+
+pUserData [in] The user data that was passed to drwav_init_write() and family.
+pData [out] A pointer to the data to write.
+bytesToWrite [in] The number of bytes to write.
+
+Returns the number of bytes actually written.
+
+If the return value differs from bytesToWrite, it indicates an error.
+*/
+typedef size_t (* drwav_write_proc)(void* pUserData, const void* pData, size_t bytesToWrite);
+
+/*
+Callback for when data needs to be seeked.
+
+pUserData [in] The user data that was passed to drwav_init() and family.
+offset [in] The number of bytes to move, relative to the origin. Will never be negative.
+origin [in] The origin of the seek - the current position or the start of the stream.
+
+Returns whether or not the seek was successful.
+
+Whether or not it is relative to the beginning or current position is determined by the "origin" parameter which will be either drwav_seek_origin_start or
+drwav_seek_origin_current.
+*/
+typedef drwav_bool32 (* drwav_seek_proc)(void* pUserData, int offset, drwav_seek_origin origin);
+
+/*
+Callback for when drwav_init_ex() finds a chunk.
+
+pChunkUserData [in] The user data that was passed to the pChunkUserData parameter of drwav_init_ex() and family.
+onRead [in] A pointer to the function to call when reading.
+onSeek [in] A pointer to the function to call when seeking.
+pReadSeekUserData [in] The user data that was passed to the pReadSeekUserData parameter of drwav_init_ex() and family.
+pChunkHeader [in] A pointer to an object containing basic header information about the chunk. Use this to identify the chunk.
+container [in] Whether or not the WAV file is a RIFF or Wave64 container. If you're unsure of the difference, assume RIFF.
+pFMT [in] A pointer to the object containing the contents of the "fmt" chunk.
+
+Returns the number of bytes read + seeked.
+
+To read data from the chunk, call onRead(), passing in pReadSeekUserData as the first parameter. Do the same for seeking with onSeek(). The return value must
+be the total number of bytes you have read _plus_ seeked.
+
+Use the `container` argument to discriminate the fields in `pChunkHeader->id`. If the container is `drwav_container_riff` or `drwav_container_rf64` you should
+use `id.fourcc`, otherwise you should use `id.guid`.
+
+The `pFMT` parameter can be used to determine the data format of the wave file. Use `drwav_fmt_get_format()` to get the sample format, which will be one of the
+`DR_WAVE_FORMAT_*` identifiers.
+
+The read pointer will be sitting on the first byte after the chunk's header. You must not attempt to read beyond the boundary of the chunk.
+*/
+typedef drwav_uint64 (* drwav_chunk_proc)(void* pChunkUserData, drwav_read_proc onRead, drwav_seek_proc onSeek, void* pReadSeekUserData, const drwav_chunk_header* pChunkHeader, drwav_container container, const drwav_fmt* pFMT);
+
+typedef struct
+{+ void* pUserData;
+ void* (* onMalloc)(size_t sz, void* pUserData);
+ void* (* onRealloc)(void* p, size_t sz, void* pUserData);
+ void (* onFree)(void* p, void* pUserData);
+} drwav_allocation_callbacks;
+
+/* Structure for internal use. Only used for loaders opened with drwav_init_memory(). */
+typedef struct
+{+ const drwav_uint8* data;
+ size_t dataSize;
+ size_t currentReadPos;
+} drwav__memory_stream;
+
+/* Structure for internal use. Only used for writers opened with drwav_init_memory_write(). */
+typedef struct
+{+ void** ppData;
+ size_t* pDataSize;
+ size_t dataSize;
+ size_t dataCapacity;
+ size_t currentWritePos;
+} drwav__memory_stream_write;
+
+typedef struct
+{+ drwav_container container; /* RIFF, W64. */
+ drwav_uint32 format; /* DR_WAVE_FORMAT_* */
+ drwav_uint32 channels;
+ drwav_uint32 sampleRate;
+ drwav_uint32 bitsPerSample;
+} drwav_data_format;
+
+typedef enum
+{+ drwav_metadata_type_none = 0,
+
+ /*
+ Unknown simply means a chunk that drwav does not handle specifically. You can still ask to
+ receive these chunks as metadata objects. It is then up to you to interpret the chunk's data.
+ You can also write unknown metadata to a wav file. Be careful writing unknown chunks if you
+ have also edited the audio data. The unknown chunks could represent offsets/sizes that no
+ longer correctly correspond to the audio data.
+ */
+ drwav_metadata_type_unknown = 1 << 0,
+
+ /* Only 1 of each of these metadata items are allowed in a wav file. */
+ drwav_metadata_type_smpl = 1 << 1,
+ drwav_metadata_type_inst = 1 << 2,
+ drwav_metadata_type_cue = 1 << 3,
+ drwav_metadata_type_acid = 1 << 4,
+ drwav_metadata_type_bext = 1 << 5,
+
+ /*
+ Wav files often have a LIST chunk. This is a chunk that contains a set of subchunks. For this
+ higher-level metadata API, we don't make a distinction between a regular chunk and a LIST
+ subchunk. Instead, they are all just 'metadata' items.
+
+ There can be multiple of these metadata items in a wav file.
+ */
+ drwav_metadata_type_list_label = 1 << 6,
+ drwav_metadata_type_list_note = 1 << 7,
+ drwav_metadata_type_list_labelled_cue_region = 1 << 8,
+
+ drwav_metadata_type_list_info_software = 1 << 9,
+ drwav_metadata_type_list_info_copyright = 1 << 10,
+ drwav_metadata_type_list_info_title = 1 << 11,
+ drwav_metadata_type_list_info_artist = 1 << 12,
+ drwav_metadata_type_list_info_comment = 1 << 13,
+ drwav_metadata_type_list_info_date = 1 << 14,
+ drwav_metadata_type_list_info_genre = 1 << 15,
+ drwav_metadata_type_list_info_album = 1 << 16,
+ drwav_metadata_type_list_info_tracknumber = 1 << 17,
+
+ /* Other type constants for convenience. */
+ drwav_metadata_type_list_all_info_strings = drwav_metadata_type_list_info_software
+ | drwav_metadata_type_list_info_copyright
+ | drwav_metadata_type_list_info_title
+ | drwav_metadata_type_list_info_artist
+ | drwav_metadata_type_list_info_comment
+ | drwav_metadata_type_list_info_date
+ | drwav_metadata_type_list_info_genre
+ | drwav_metadata_type_list_info_album
+ | drwav_metadata_type_list_info_tracknumber,
+
+ drwav_metadata_type_list_all_adtl = drwav_metadata_type_list_label
+ | drwav_metadata_type_list_note
+ | drwav_metadata_type_list_labelled_cue_region,
+
+ drwav_metadata_type_all = -2, /*0xFFFFFFFF & ~drwav_metadata_type_unknown,*/
+ drwav_metadata_type_all_including_unknown = -1 /*0xFFFFFFFF,*/
+} drwav_metadata_type;
+
+/*
+Sampler Metadata
+
+The sampler chunk contains information about how a sound should be played in the context of a whole
+audio production, and when used in a sampler. See https://en.wikipedia.org/wiki/Sample-based_synthesis.
+*/
+typedef enum
+{+ drwav_smpl_loop_type_forward = 0,
+ drwav_smpl_loop_type_pingpong = 1,
+ drwav_smpl_loop_type_backward = 2
+} drwav_smpl_loop_type;
+
+typedef struct
+{+ /* The ID of the associated cue point, see drwav_cue and drwav_cue_point. As with all cue point IDs, this can correspond to a label chunk to give this loop a name, see drwav_list_label_or_note. */
+ drwav_uint32 cuePointId;
+
+ /* See drwav_smpl_loop_type. */
+ drwav_uint32 type;
+
+ /* The byte offset of the first sample to be played in the loop. */
+ drwav_uint32 firstSampleByteOffset;
+
+ /* The byte offset into the audio data of the last sample to be played in the loop. */
+ drwav_uint32 lastSampleByteOffset;
+
+ /* A value to represent that playback should occur at a point between samples. This value ranges from 0 to UINT32_MAX. Where a value of 0 means no fraction, and a value of (UINT32_MAX / 2) would mean half a sample. */
+ drwav_uint32 sampleFraction;
+
+ /* Number of times to play the loop. 0 means loop infinitely. */
+ drwav_uint32 playCount;
+} drwav_smpl_loop;
+
+typedef struct
+{+ /* IDs for a particular MIDI manufacturer. 0 if not used. */
+ drwav_uint32 manufacturerId;
+ drwav_uint32 productId;
+
+ /* The period of 1 sample in nanoseconds. */
+ drwav_uint32 samplePeriodNanoseconds;
+
+ /* The MIDI root note of this file. 0 to 127. */
+ drwav_uint32 midiUnityNote;
+
+ /* The fraction of a semitone up from the given MIDI note. This is a value from 0 to UINT32_MAX, where 0 means no change and (UINT32_MAX / 2) is half a semitone (AKA 50 cents). */
+ drwav_uint32 midiPitchFraction;
+
+ /* Data relating to SMPTE standards which are used for syncing audio and video. 0 if not used. */
+ drwav_uint32 smpteFormat;
+ drwav_uint32 smpteOffset;
+
+ /* drwav_smpl_loop loops. */
+ drwav_uint32 sampleLoopCount;
+
+ /* Optional sampler-specific data. */
+ drwav_uint32 samplerSpecificDataSizeInBytes;
+
+ drwav_smpl_loop* pLoops;
+ drwav_uint8* pSamplerSpecificData;
+} drwav_smpl;
+
+/*
+Instrument Metadata
+
+The inst metadata contains data about how a sound should be played as part of an instrument. This
+commonly read by samplers. See https://en.wikipedia.org/wiki/Sample-based_synthesis.
+*/
+typedef struct
+{+ drwav_int8 midiUnityNote; /* The root note of the audio as a MIDI note number. 0 to 127. */
+ drwav_int8 fineTuneCents; /* -50 to +50 */
+ drwav_int8 gainDecibels; /* -64 to +64 */
+ drwav_int8 lowNote; /* 0 to 127 */
+ drwav_int8 highNote; /* 0 to 127 */
+ drwav_int8 lowVelocity; /* 1 to 127 */
+ drwav_int8 highVelocity; /* 1 to 127 */
+} drwav_inst;
+
+/*
+Cue Metadata
+
+Cue points are markers at specific points in the audio. They often come with an associated piece of
+drwav_list_label_or_note metadata which contains the text for the marker.
+*/
+typedef struct
+{+ /* Unique identification value. */
+ drwav_uint32 id;
+
+ /* Set to 0. This is only relevant if there is a 'playlist' chunk - which is not supported by dr_wav. */
+ drwav_uint32 playOrderPosition;
+
+ /* Should always be "data". This represents the fourcc value of the chunk that this cue point corresponds to. dr_wav only supports a single data chunk so this should always be "data". */
+ drwav_uint8 dataChunkId[4];
+
+ /* Set to 0. This is only relevant if there is a wave list chunk. dr_wav, like lots of readers/writers, do not support this. */
+ drwav_uint32 chunkStart;
+
+ /* Set to 0 for uncompressed formats. Else the last byte in compressed wave data where decompression can begin to find the value of the corresponding sample value. */
+ drwav_uint32 blockStart;
+
+ /* For uncompressed formats this is the byte offset of the cue point into the audio data. For compressed formats this is relative to the block specified with blockStart. */
+ drwav_uint32 sampleByteOffset;
+} drwav_cue_point;
+
+typedef struct
+{+ drwav_uint32 cuePointCount;
+ drwav_cue_point *pCuePoints;
+} drwav_cue;
+
+/*
+Acid Metadata
+
+This chunk contains some information about the time signature and the tempo of the audio.
+*/
+typedef enum
+{+ drwav_acid_flag_one_shot = 1, /* If this is not set, then it is a loop instead of a one-shot. */
+ drwav_acid_flag_root_note_set = 2,
+ drwav_acid_flag_stretch = 4,
+ drwav_acid_flag_disk_based = 8,
+ drwav_acid_flag_acidizer = 16 /* Not sure what this means. */
+} drwav_acid_flag;
+
+typedef struct
+{+ /* A bit-field, see drwav_acid_flag. */
+ drwav_uint32 flags;
+
+ /* Valid if flags contains drwav_acid_flag_root_note_set. It represents the MIDI root note the file - a value from 0 to 127. */
+ drwav_uint16 midiUnityNote;
+
+ /* Reserved values that should probably be ignored. reserved1 seems to often be 128 and reserved2 is 0. */
+ drwav_uint16 reserved1;
+ float reserved2;
+
+ /* Number of beats. */
+ drwav_uint32 numBeats;
+
+ /* The time signature of the audio. */
+ drwav_uint16 meterDenominator;
+ drwav_uint16 meterNumerator;
+
+ /* Beats per minute of the track. Setting a value of 0 suggests that there is no tempo. */
+ float tempo;
+} drwav_acid;
+
+/*
+Cue Label or Note metadata
+
+These are 2 different types of metadata, but they have the exact same format. Labels tend to be the
+more common and represent a short name for a cue point. Notes might be used to represent a longer
+comment.
+*/
+typedef struct
+{+ /* The ID of a cue point that this label or note corresponds to. */
+ drwav_uint32 cuePointId;
+
+ /* Size of the string not including any null terminator. */
+ drwav_uint32 stringLength;
+
+ /* The string. The *init_with_metadata functions null terminate this for convenience. */
+ char* pString;
+} drwav_list_label_or_note;
+
+/*
+BEXT metadata, also known as Broadcast Wave Format (BWF)
+
+This metadata adds some extra description to an audio file. You must check the version field to
+determine if the UMID or the loudness fields are valid.
+*/
+typedef struct
+{+ /*
+ These top 3 fields, and the umid field are actually defined in the standard as a statically
+ sized buffers. In order to reduce the size of this struct (and therefore the union in the
+ metadata struct), we instead store these as pointers.
+ */
+ char* pDescription; /* Can be NULL or a null-terminated string, must be <= 256 characters. */
+ char* pOriginatorName; /* Can be NULL or a null-terminated string, must be <= 32 characters. */
+ char* pOriginatorReference; /* Can be NULL or a null-terminated string, must be <= 32 characters. */
+ char pOriginationDate[10]; /* ASCII "yyyy:mm:dd". */
+ char pOriginationTime[8]; /* ASCII "hh:mm:ss". */
+ drwav_uint64 timeReference; /* First sample count since midnight. */
+ drwav_uint16 version; /* Version of the BWF, check this to see if the fields below are valid. */
+
+ /*
+ Unrestricted ASCII characters containing a collection of strings terminated by CR/LF. Each
+ string shall contain a description of a coding process applied to the audio data.
+ */
+ char* pCodingHistory;
+ drwav_uint32 codingHistorySize;
+
+ /* Fields below this point are only valid if the version is 1 or above. */
+ drwav_uint8* pUMID; /* Exactly 64 bytes of SMPTE UMID */
+
+ /* Fields below this point are only valid if the version is 2 or above. */
+ drwav_uint16 loudnessValue; /* Integrated Loudness Value of the file in LUFS (multiplied by 100). */
+ drwav_uint16 loudnessRange; /* Loudness Range of the file in LU (multiplied by 100). */
+ drwav_uint16 maxTruePeakLevel; /* Maximum True Peak Level of the file expressed as dBTP (multiplied by 100). */
+ drwav_uint16 maxMomentaryLoudness; /* Highest value of the Momentary Loudness Level of the file in LUFS (multiplied by 100). */
+ drwav_uint16 maxShortTermLoudness; /* Highest value of the Short-Term Loudness Level of the file in LUFS (multiplied by 100). */
+} drwav_bext;
+
+/*
+Info Text Metadata
+
+There a many different types of information text that can be saved in this format. This is where
+things like the album name, the artists, the year it was produced, etc are saved. See
+drwav_metadata_type for the full list of types that dr_wav supports.
+*/
+typedef struct
+{+ /* Size of the string not including any null terminator. */
+ drwav_uint32 stringLength;
+
+ /* The string. The *init_with_metadata functions null terminate this for convenience. */
+ char* pString;
+} drwav_list_info_text;
+
+/*
+Labelled Cue Region Metadata
+
+The labelled cue region metadata is used to associate some region of audio with text. The region
+starts at a cue point, and extends for the given number of samples.
+*/
+typedef struct
+{+ /* The ID of a cue point that this object corresponds to. */
+ drwav_uint32 cuePointId;
+
+ /* The number of samples from the cue point forwards that should be considered this region */
+ drwav_uint32 sampleLength;
+
+ /* Four characters used to say what the purpose of this region is. */
+ drwav_uint8 purposeId[4];
+
+ /* Unsure of the exact meanings of these. It appears to be acceptable to set them all to 0. */
+ drwav_uint16 country;
+ drwav_uint16 language;
+ drwav_uint16 dialect;
+ drwav_uint16 codePage;
+
+ /* Size of the string not including any null terminator. */
+ drwav_uint32 stringLength;
+
+ /* The string. The *init_with_metadata functions null terminate this for convenience. */
+ char* pString;
+} drwav_list_labelled_cue_region;
+
+/*
+Unknown Metadata
+
+This chunk just represents a type of chunk that dr_wav does not understand.
+
+Unknown metadata has a location attached to it. This is because wav files can have a LIST chunk
+that contains subchunks. These LIST chunks can be one of two types. An adtl list, or an INFO
+list. This enum is used to specify the location of a chunk that dr_wav currently doesn't support.
+*/
+typedef enum
+{+ drwav_metadata_location_invalid,
+ drwav_metadata_location_top_level,
+ drwav_metadata_location_inside_info_list,
+ drwav_metadata_location_inside_adtl_list
+} drwav_metadata_location;
+
+typedef struct
+{+ drwav_uint8 id[4];
+ drwav_metadata_location chunkLocation;
+ drwav_uint32 dataSizeInBytes;
+ drwav_uint8* pData;
+} drwav_unknown_metadata;
+
+/*
+Metadata is saved as a union of all the supported types.
+*/
+typedef struct
+{+ /* Determines which item in the union is valid. */
+ drwav_metadata_type type;
+
+ union
+ {+ drwav_cue cue;
+ drwav_smpl smpl;
+ drwav_acid acid;
+ drwav_inst inst;
+ drwav_bext bext;
+ drwav_list_label_or_note labelOrNote; /* List label or list note. */
+ drwav_list_labelled_cue_region labelledCueRegion;
+ drwav_list_info_text infoText; /* Any of the list info types. */
+ drwav_unknown_metadata unknown;
+ } data;
+} drwav_metadata;
+
+typedef struct
+{+ /* A pointer to the function to call when more data is needed. */
+ drwav_read_proc onRead;
+
+ /* A pointer to the function to call when data needs to be written. Only used when the drwav object is opened in write mode. */
+ drwav_write_proc onWrite;
+
+ /* A pointer to the function to call when the wav file needs to be seeked. */
+ drwav_seek_proc onSeek;
+
+ /* The user data to pass to callbacks. */
+ void* pUserData;
+
+ /* Allocation callbacks. */
+ drwav_allocation_callbacks allocationCallbacks;
+
+
+ /* Whether or not the WAV file is formatted as a standard RIFF file or W64. */
+ drwav_container container;
+
+
+ /* Structure containing format information exactly as specified by the wav file. */
+ drwav_fmt fmt;
+
+ /* The sample rate. Will be set to something like 44100. */
+ drwav_uint32 sampleRate;
+
+ /* The number of channels. This will be set to 1 for monaural streams, 2 for stereo, etc. */
+ drwav_uint16 channels;
+
+ /* The bits per sample. Will be set to something like 16, 24, etc. */
+ drwav_uint16 bitsPerSample;
+
+ /* Equal to fmt.formatTag, or the value specified by fmt.subFormat if fmt.formatTag is equal to 65534 (WAVE_FORMAT_EXTENSIBLE). */
+ drwav_uint16 translatedFormatTag;
+
+ /* The total number of PCM frames making up the audio data. */
+ drwav_uint64 totalPCMFrameCount;
+
+
+ /* The size in bytes of the data chunk. */
+ drwav_uint64 dataChunkDataSize;
+
+ /* The position in the stream of the first data byte of the data chunk. This is used for seeking. */
+ drwav_uint64 dataChunkDataPos;
+
+ /* The number of bytes remaining in the data chunk. */
+ drwav_uint64 bytesRemaining;
+
+ /* The current read position in PCM frames. */
+ drwav_uint64 readCursorInPCMFrames;
+
+
+ /*
+ Only used in sequential write mode. Keeps track of the desired size of the "data" chunk at the point of initialization time. Always
+ set to 0 for non-sequential writes and when the drwav object is opened in read mode. Used for validation.
+ */
+ drwav_uint64 dataChunkDataSizeTargetWrite;
+
+ /* Keeps track of whether or not the wav writer was initialized in sequential mode. */
+ drwav_bool32 isSequentialWrite;
+
+
+ /* A bit-field of drwav_metadata_type values, only bits set in this variable are parsed and saved */
+ drwav_metadata_type allowedMetadataTypes;
+
+ /* A array of metadata. This is valid after the *init_with_metadata call returns. It will be valid until drwav_uninit() is called. You can take ownership of this data with drwav_take_ownership_of_metadata(). */
+ drwav_metadata* pMetadata;
+ drwav_uint32 metadataCount;
+
+
+ /* A hack to avoid a DRWAV_MALLOC() when opening a decoder with drwav_init_memory(). */
+ drwav__memory_stream memoryStream;
+ drwav__memory_stream_write memoryStreamWrite;
+
+
+ /* Microsoft ADPCM specific data. */
+ struct
+ {+ drwav_uint32 bytesRemainingInBlock;
+ drwav_uint16 predictor[2];
+ drwav_int32 delta[2];
+ drwav_int32 cachedFrames[4]; /* Samples are stored in this cache during decoding. */
+ drwav_uint32 cachedFrameCount;
+ drwav_int32 prevFrames[2][2]; /* The previous 2 samples for each channel (2 channels at most). */
+ } msadpcm;
+
+ /* IMA ADPCM specific data. */
+ struct
+ {+ drwav_uint32 bytesRemainingInBlock;
+ drwav_int32 predictor[2];
+ drwav_int32 stepIndex[2];
+ drwav_int32 cachedFrames[16]; /* Samples are stored in this cache during decoding. */
+ drwav_uint32 cachedFrameCount;
+ } ima;
+} drwav;
+
+
+/*
+Initializes a pre-allocated drwav object for reading.
+
+pWav [out] A pointer to the drwav object being initialized.
+onRead [in] The function to call when data needs to be read from the client.
+onSeek [in] The function to call when the read position of the client data needs to move.
+onChunk [in, optional] The function to call when a chunk is enumerated at initialized time.
+pUserData, pReadSeekUserData [in, optional] A pointer to application defined data that will be passed to onRead and onSeek.
+pChunkUserData [in, optional] A pointer to application defined data that will be passed to onChunk.
+flags [in, optional] A set of flags for controlling how things are loaded.
+
+Returns true if successful; false otherwise.
+
+Close the loader with drwav_uninit().
+
+This is the lowest level function for initializing a WAV file. You can also use drwav_init_file() and drwav_init_memory()
+to open the stream from a file or from a block of memory respectively.
+
+Possible values for flags:
+ DRWAV_SEQUENTIAL: Never perform a backwards seek while loading. This disables the chunk callback and will cause this function
+ to return as soon as the data chunk is found. Any chunks after the data chunk will be ignored.
+
+drwav_init() is equivalent to "drwav_init_ex(pWav, onRead, onSeek, NULL, pUserData, NULL, 0);".
+
+The onChunk callback is not called for the WAVE or FMT chunks. The contents of the FMT chunk can be read from pWav->fmt
+after the function returns.
+
+See also: drwav_init_file(), drwav_init_memory(), drwav_uninit()
+*/
+DRWAV_API drwav_bool32 drwav_init(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_ex(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_chunk_proc onChunk, void* pReadSeekUserData, void* pChunkUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks);
+
+/*
+Initializes a pre-allocated drwav object for writing.
+
+onWrite [in] The function to call when data needs to be written.
+onSeek [in] The function to call when the write position needs to move.
+pUserData [in, optional] A pointer to application defined data that will be passed to onWrite and onSeek.
+metadata, numMetadata [in, optional] An array of metadata objects that should be written to the file. The array is not edited. You are responsible for this metadata memory and it must maintain valid until drwav_uninit() is called.
+
+Returns true if successful; false otherwise.
+
+Close the writer with drwav_uninit().
+
+This is the lowest level function for initializing a WAV file. You can also use drwav_init_file_write() and drwav_init_memory_write()
+to open the stream from a file or from a block of memory respectively.
+
+If the total sample count is known, you can use drwav_init_write_sequential(). This avoids the need for dr_wav to perform
+a post-processing step for storing the total sample count and the size of the data chunk which requires a backwards seek.
+
+See also: drwav_init_file_write(), drwav_init_memory_write(), drwav_uninit()
+*/
+DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_write_sequential(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount);
+
+/*
+Utility function to determine the target size of the entire data to be written (including all headers and chunks).
+
+Returns the target size in bytes.
+
+The metadata argument can be NULL meaning no metadata exists.
+
+Useful if the application needs to know the size to allocate.
+
+Only writing to the RIFF chunk and one data chunk is currently supported.
+
+See also: drwav_init_write(), drwav_init_file_write(), drwav_init_memory_write()
+*/
+DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount);
+
+/*
+Take ownership of the metadata objects that were allocated via one of the init_with_metadata() function calls. The init_with_metdata functions perform a single heap allocation for this metadata.
+
+Useful if you want the data to persist beyond the lifetime of the drwav object.
+
+You must free the data returned from this function using drwav_free().
+*/
+DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav);
+
+/*
+Uninitializes the given drwav object.
+
+Use this only for objects initialized with drwav_init*() functions (drwav_init(), drwav_init_ex(), drwav_init_write(), drwav_init_write_sequential()).
+*/
+DRWAV_API drwav_result drwav_uninit(drwav* pWav);
+
+
+/*
+Reads raw audio data.
+
+This is the lowest level function for reading audio data. It simply reads the given number of
+bytes of the raw internal sample data.
+
+Consider using drwav_read_pcm_frames_s16(), drwav_read_pcm_frames_s32() or drwav_read_pcm_frames_f32() for
+reading sample data in a consistent format.
+
+pBufferOut can be NULL in which case a seek will be performed.
+
+Returns the number of bytes actually read.
+*/
+DRWAV_API size_t drwav_read_raw(drwav* pWav, size_t bytesToRead, void* pBufferOut);
+
+/*
+Reads up to the specified number of PCM frames from the WAV file.
+
+The output data will be in the file's internal format, converted to native-endian byte order. Use
+drwav_read_pcm_frames_s16/f32/s32() to read data in a specific format.
+
+If the return value is less than <framesToRead> it means the end of the file has been reached or
+you have requested more PCM frames than can possibly fit in the output buffer.
+
+This function will only work when sample data is of a fixed size and uncompressed. If you are
+using a compressed format consider using drwav_read_raw() or drwav_read_pcm_frames_s16/s32/f32().
+
+pBufferOut can be NULL in which case a seek will be performed.
+*/
+DRWAV_API drwav_uint64 drwav_read_pcm_frames(drwav* pWav, drwav_uint64 framesToRead, void* pBufferOut);
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_le(drwav* pWav, drwav_uint64 framesToRead, void* pBufferOut);
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_be(drwav* pWav, drwav_uint64 framesToRead, void* pBufferOut);
+
+/*
+Seeks to the given PCM frame.
+
+Returns true if successful; false otherwise.
+*/
+DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex);
+
+/*
+Retrieves the current read position in pcm frames.
+*/
+DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor);
+
+/*
+Retrieves the length of the file.
+*/
+DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength);
+
+
+/*
+Writes raw audio data.
+
+Returns the number of bytes actually written. If this differs from bytesToWrite, it indicates an error.
+*/
+DRWAV_API size_t drwav_write_raw(drwav* pWav, size_t bytesToWrite, const void* pData);
+
+/*
+Writes PCM frames.
+
+Returns the number of PCM frames written.
+
+Input samples need to be in native-endian byte order. On big-endian architectures the input data will be converted to
+little-endian. Use drwav_write_raw() to write raw audio data without performing any conversion.
+*/
+DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData);
+DRWAV_API drwav_uint64 drwav_write_pcm_frames_le(drwav* pWav, drwav_uint64 framesToWrite, const void* pData);
+DRWAV_API drwav_uint64 drwav_write_pcm_frames_be(drwav* pWav, drwav_uint64 framesToWrite, const void* pData);
+
+/* Conversion Utilities */
+#ifndef DR_WAV_NO_CONVERSION_API
+
+/*
+Reads a chunk of audio data and converts it to signed 16-bit PCM samples.
+
+pBufferOut can be NULL in which case a seek will be performed.
+
+Returns the number of PCM frames actually read.
+
+If the return value is less than <framesToRead> it means the end of the file has been reached.
+*/
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut);
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut);
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut);
+
+/* Low-level function for converting unsigned 8-bit PCM samples to signed 16-bit PCM samples. */
+DRWAV_API void drwav_u8_to_s16(drwav_int16* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+/* Low-level function for converting signed 24-bit PCM samples to signed 16-bit PCM samples. */
+DRWAV_API void drwav_s24_to_s16(drwav_int16* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+/* Low-level function for converting signed 32-bit PCM samples to signed 16-bit PCM samples. */
+DRWAV_API void drwav_s32_to_s16(drwav_int16* pOut, const drwav_int32* pIn, size_t sampleCount);
+
+/* Low-level function for converting IEEE 32-bit floating point samples to signed 16-bit PCM samples. */
+DRWAV_API void drwav_f32_to_s16(drwav_int16* pOut, const float* pIn, size_t sampleCount);
+
+/* Low-level function for converting IEEE 64-bit floating point samples to signed 16-bit PCM samples. */
+DRWAV_API void drwav_f64_to_s16(drwav_int16* pOut, const double* pIn, size_t sampleCount);
+
+/* Low-level function for converting A-law samples to signed 16-bit PCM samples. */
+DRWAV_API void drwav_alaw_to_s16(drwav_int16* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+/* Low-level function for converting u-law samples to signed 16-bit PCM samples. */
+DRWAV_API void drwav_mulaw_to_s16(drwav_int16* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+
+/*
+Reads a chunk of audio data and converts it to IEEE 32-bit floating point samples.
+
+pBufferOut can be NULL in which case a seek will be performed.
+
+Returns the number of PCM frames actually read.
+
+If the return value is less than <framesToRead> it means the end of the file has been reached.
+*/
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut);
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut);
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut);
+
+/* Low-level function for converting unsigned 8-bit PCM samples to IEEE 32-bit floating point samples. */
+DRWAV_API void drwav_u8_to_f32(float* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+/* Low-level function for converting signed 16-bit PCM samples to IEEE 32-bit floating point samples. */
+DRWAV_API void drwav_s16_to_f32(float* pOut, const drwav_int16* pIn, size_t sampleCount);
+
+/* Low-level function for converting signed 24-bit PCM samples to IEEE 32-bit floating point samples. */
+DRWAV_API void drwav_s24_to_f32(float* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+/* Low-level function for converting signed 32-bit PCM samples to IEEE 32-bit floating point samples. */
+DRWAV_API void drwav_s32_to_f32(float* pOut, const drwav_int32* pIn, size_t sampleCount);
+
+/* Low-level function for converting IEEE 64-bit floating point samples to IEEE 32-bit floating point samples. */
+DRWAV_API void drwav_f64_to_f32(float* pOut, const double* pIn, size_t sampleCount);
+
+/* Low-level function for converting A-law samples to IEEE 32-bit floating point samples. */
+DRWAV_API void drwav_alaw_to_f32(float* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+/* Low-level function for converting u-law samples to IEEE 32-bit floating point samples. */
+DRWAV_API void drwav_mulaw_to_f32(float* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+
+/*
+Reads a chunk of audio data and converts it to signed 32-bit PCM samples.
+
+pBufferOut can be NULL in which case a seek will be performed.
+
+Returns the number of PCM frames actually read.
+
+If the return value is less than <framesToRead> it means the end of the file has been reached.
+*/
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut);
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut);
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut);
+
+/* Low-level function for converting unsigned 8-bit PCM samples to signed 32-bit PCM samples. */
+DRWAV_API void drwav_u8_to_s32(drwav_int32* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+/* Low-level function for converting signed 16-bit PCM samples to signed 32-bit PCM samples. */
+DRWAV_API void drwav_s16_to_s32(drwav_int32* pOut, const drwav_int16* pIn, size_t sampleCount);
+
+/* Low-level function for converting signed 24-bit PCM samples to signed 32-bit PCM samples. */
+DRWAV_API void drwav_s24_to_s32(drwav_int32* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+/* Low-level function for converting IEEE 32-bit floating point samples to signed 32-bit PCM samples. */
+DRWAV_API void drwav_f32_to_s32(drwav_int32* pOut, const float* pIn, size_t sampleCount);
+
+/* Low-level function for converting IEEE 64-bit floating point samples to signed 32-bit PCM samples. */
+DRWAV_API void drwav_f64_to_s32(drwav_int32* pOut, const double* pIn, size_t sampleCount);
+
+/* Low-level function for converting A-law samples to signed 32-bit PCM samples. */
+DRWAV_API void drwav_alaw_to_s32(drwav_int32* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+/* Low-level function for converting u-law samples to signed 32-bit PCM samples. */
+DRWAV_API void drwav_mulaw_to_s32(drwav_int32* pOut, const drwav_uint8* pIn, size_t sampleCount);
+
+#endif /* DR_WAV_NO_CONVERSION_API */
+
+
+/* High-Level Convenience Helpers */
+
+#ifndef DR_WAV_NO_STDIO
+/*
+Helper for initializing a wave file for reading using stdio.
+
+This holds the internal FILE object until drwav_uninit() is called. Keep this in mind if you're caching drwav
+objects because the operating system may restrict the number of file handles an application can have open at
+any given time.
+*/
+DRWAV_API drwav_bool32 drwav_init_file(drwav* pWav, const char* filename, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_file_ex(drwav* pWav, const char* filename, drwav_chunk_proc onChunk, void* pChunkUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_file_w(drwav* pWav, const wchar_t* filename, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_file_ex_w(drwav* pWav, const wchar_t* filename, drwav_chunk_proc onChunk, void* pChunkUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks);
+
+
+/*
+Helper for initializing a wave file for writing using stdio.
+
+This holds the internal FILE object until drwav_uninit() is called. Keep this in mind if you're caching drwav
+objects because the operating system may restrict the number of file handles an application can have open at
+any given time.
+*/
+DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_file_write_sequential(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_file_write_sequential_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks);
+#endif /* DR_WAV_NO_STDIO */
+
+/*
+Helper for initializing a loader from a pre-allocated memory buffer.
+
+This does not create a copy of the data. It is up to the application to ensure the buffer remains valid for
+the lifetime of the drwav object.
+
+The buffer should contain the contents of the entire wave file, not just the sample data.
+*/
+DRWAV_API drwav_bool32 drwav_init_memory(drwav* pWav, const void* data, size_t dataSize, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_memory_ex(drwav* pWav, const void* data, size_t dataSize, drwav_chunk_proc onChunk, void* pChunkUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks);
+
+/*
+Helper for initializing a writer which outputs data to a memory buffer.
+
+dr_wav will manage the memory allocations, however it is up to the caller to free the data with drwav_free().
+
+The buffer will remain allocated even after drwav_uninit() is called. The buffer should not be considered valid
+until after drwav_uninit() has been called.
+*/
+DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_memory_write_sequential(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks);
+
+
+#ifndef DR_WAV_NO_CONVERSION_API
+/*
+Opens and reads an entire wav file in a single operation.
+
+The return value is a heap-allocated buffer containing the audio data. Use drwav_free() to free the buffer.
+*/
+DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+#ifndef DR_WAV_NO_STDIO
+/*
+Opens and decodes an entire wav file in a single operation.
+
+The return value is a heap-allocated buffer containing the audio data. Use drwav_free() to free the buffer.
+*/
+DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+#endif
+/*
+Opens and decodes an entire wav file from a block of memory in a single operation.
+
+The return value is a heap-allocated buffer containing the audio data. Use drwav_free() to free the buffer.
+*/
+DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks);
+#endif
+
+/* Frees data that was allocated internally by dr_wav. */
+DRWAV_API void drwav_free(void* p, const drwav_allocation_callbacks* pAllocationCallbacks);
+
+/* Converts bytes from a wav stream to a sized type of native endian. */
+DRWAV_API drwav_uint16 drwav_bytes_to_u16(const drwav_uint8* data);
+DRWAV_API drwav_int16 drwav_bytes_to_s16(const drwav_uint8* data);
+DRWAV_API drwav_uint32 drwav_bytes_to_u32(const drwav_uint8* data);
+DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data);
+DRWAV_API drwav_uint64 drwav_bytes_to_u64(const drwav_uint8* data);
+DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data);
+DRWAV_API float drwav_bytes_to_f32(const drwav_uint8* data);
+
+/* Compares a GUID for the purpose of checking the type of a Wave64 chunk. */
+DRWAV_API drwav_bool32 drwav_guid_equal(const drwav_uint8 a[16], const drwav_uint8 b[16]);
+
+/* Compares a four-character-code for the purpose of checking the type of a RIFF chunk. */
+DRWAV_API drwav_bool32 drwav_fourcc_equal(const drwav_uint8* a, const char* b);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* dr_wav_h */
+
+
+/************************************************************************************************************************************************************
+ ************************************************************************************************************************************************************
+
+ IMPLEMENTATION
+
+ ************************************************************************************************************************************************************
+ ************************************************************************************************************************************************************/
+#if defined(DR_WAV_IMPLEMENTATION) || defined(DRWAV_IMPLEMENTATION)
+#ifndef dr_wav_c
+#define dr_wav_c
+
+#ifdef __MRC__
+/* MrC currently doesn't compile dr_wav correctly with any optimizations enabled. */
+#pragma options opt off
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h> /* For INT_MAX */
+
+#ifndef DR_WAV_NO_STDIO
+#include <stdio.h>
+#ifndef DR_WAV_NO_WCHAR
+#include <wchar.h>
+#endif
+#endif
+
+/* Standard library stuff. */
+#ifndef DRWAV_ASSERT
+#include <assert.h>
+#define DRWAV_ASSERT(expression) assert(expression)
+#endif
+#ifndef DRWAV_MALLOC
+#define DRWAV_MALLOC(sz) malloc((sz))
+#endif
+#ifndef DRWAV_REALLOC
+#define DRWAV_REALLOC(p, sz) realloc((p), (sz))
+#endif
+#ifndef DRWAV_FREE
+#define DRWAV_FREE(p) free((p))
+#endif
+#ifndef DRWAV_COPY_MEMORY
+#define DRWAV_COPY_MEMORY(dst, src, sz) memcpy((dst), (src), (sz))
+#endif
+#ifndef DRWAV_ZERO_MEMORY
+#define DRWAV_ZERO_MEMORY(p, sz) memset((p), 0, (sz))
+#endif
+#ifndef DRWAV_ZERO_OBJECT
+#define DRWAV_ZERO_OBJECT(p) DRWAV_ZERO_MEMORY((p), sizeof(*p))
+#endif
+
+#define drwav_countof(x) (sizeof(x) / sizeof(x[0]))
+#define drwav_align(x, a) ((((x) + (a) - 1) / (a)) * (a))
+#define drwav_min(a, b) (((a) < (b)) ? (a) : (b))
+#define drwav_max(a, b) (((a) > (b)) ? (a) : (b))
+#define drwav_clamp(x, lo, hi) (drwav_max((lo), drwav_min((hi), (x))))
+#define drwav_offset_ptr(p, offset) (((drwav_uint8*)(p)) + (offset))
+
+#define DRWAV_MAX_SIMD_VECTOR_SIZE 64 /* 64 for AVX-512 in the future. */
+
+/* CPU architecture. */
+#if defined(__x86_64__) || defined(_M_X64)
+ #define DRWAV_X64
+#elif defined(__i386) || defined(_M_IX86)
+ #define DRWAV_X86
+#elif defined(__arm__) || defined(_M_ARM)
+ #define DRWAV_ARM
+#endif
+
+#ifdef _MSC_VER
+ #define DRWAV_INLINE __forceinline
+#elif defined(__GNUC__)
+ /*
+ I've had a bug report where GCC is emitting warnings about functions possibly not being inlineable. This warning happens when
+ the __attribute__((always_inline)) attribute is defined without an "inline" statement. I think therefore there must be some
+ case where "__inline__" is not always defined, thus the compiler emitting these warnings. When using -std=c89 or -ansi on the
+ command line, we cannot use the "inline" keyword and instead need to use "__inline__". In an attempt to work around this issue
+ I am using "__inline__" only when we're compiling in strict ANSI mode.
+ */
+ #if defined(__STRICT_ANSI__)
+ #define DRWAV_GNUC_INLINE_HINT __inline__
+ #else
+ #define DRWAV_GNUC_INLINE_HINT inline
+ #endif
+
+ #if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)) || defined(__clang__)
+ #define DRWAV_INLINE DRWAV_GNUC_INLINE_HINT __attribute__((always_inline))
+ #else
+ #define DRWAV_INLINE DRWAV_GNUC_INLINE_HINT
+ #endif
+#elif defined(__WATCOMC__)
+ #define DRWAV_INLINE __inline
+#else
+ #define DRWAV_INLINE
+#endif
+
+#if defined(SIZE_MAX)
+ #define DRWAV_SIZE_MAX SIZE_MAX
+#else
+ #if defined(_WIN64) || defined(_LP64) || defined(__LP64__)
+ #define DRWAV_SIZE_MAX ((drwav_uint64)0xFFFFFFFFFFFFFFFF)
+ #else
+ #define DRWAV_SIZE_MAX 0xFFFFFFFF
+ #endif
+#endif
+
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+ #define DRWAV_HAS_BYTESWAP16_INTRINSIC
+ #define DRWAV_HAS_BYTESWAP32_INTRINSIC
+ #define DRWAV_HAS_BYTESWAP64_INTRINSIC
+#elif defined(__clang__)
+ #if defined(__has_builtin)
+ #if __has_builtin(__builtin_bswap16)
+ #define DRWAV_HAS_BYTESWAP16_INTRINSIC
+ #endif
+ #if __has_builtin(__builtin_bswap32)
+ #define DRWAV_HAS_BYTESWAP32_INTRINSIC
+ #endif
+ #if __has_builtin(__builtin_bswap64)
+ #define DRWAV_HAS_BYTESWAP64_INTRINSIC
+ #endif
+ #endif
+#elif defined(__GNUC__)
+ #if ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
+ #define DRWAV_HAS_BYTESWAP32_INTRINSIC
+ #define DRWAV_HAS_BYTESWAP64_INTRINSIC
+ #endif
+ #if ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))
+ #define DRWAV_HAS_BYTESWAP16_INTRINSIC
+ #endif
+#endif
+
+DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
+{+ if (pMajor) {+ *pMajor = DRWAV_VERSION_MAJOR;
+ }
+
+ if (pMinor) {+ *pMinor = DRWAV_VERSION_MINOR;
+ }
+
+ if (pRevision) {+ *pRevision = DRWAV_VERSION_REVISION;
+ }
+}
+
+DRWAV_API const char* drwav_version_string(void)
+{+ return DRWAV_VERSION_STRING;
+}
+
+/*
+These limits are used for basic validation when initializing the decoder. If you exceed these limits, first of all: what on Earth are
+you doing?! (Let me know, I'd be curious!) Second, you can adjust these by #define-ing them before the dr_wav implementation.
+*/
+#ifndef DRWAV_MAX_SAMPLE_RATE
+#define DRWAV_MAX_SAMPLE_RATE 384000
+#endif
+#ifndef DRWAV_MAX_CHANNELS
+#define DRWAV_MAX_CHANNELS 256
+#endif
+#ifndef DRWAV_MAX_BITS_PER_SAMPLE
+#define DRWAV_MAX_BITS_PER_SAMPLE 64
+#endif
+
+static const drwav_uint8 drwavGUID_W64_RIFF[16] = {0x72,0x69,0x66,0x66, 0x2E,0x91, 0xCF,0x11, 0xA5,0xD6, 0x28,0xDB,0x04,0xC1,0x00,0x00}; /* 66666972-912E-11CF-A5D6-28DB04C10000 */+static const drwav_uint8 drwavGUID_W64_WAVE[16] = {0x77,0x61,0x76,0x65, 0xF3,0xAC, 0xD3,0x11, 0x8C,0xD1, 0x00,0xC0,0x4F,0x8E,0xDB,0x8A}; /* 65766177-ACF3-11D3-8CD1-00C04F8EDB8A */+/*static const drwav_uint8 drwavGUID_W64_JUNK[16] = {0x6A,0x75,0x6E,0x6B, 0xF3,0xAC, 0xD3,0x11, 0x8C,0xD1, 0x00,0xC0,0x4F,0x8E,0xDB,0x8A};*/ /* 6B6E756A-ACF3-11D3-8CD1-00C04F8EDB8A */+static const drwav_uint8 drwavGUID_W64_FMT [16] = {0x66,0x6D,0x74,0x20, 0xF3,0xAC, 0xD3,0x11, 0x8C,0xD1, 0x00,0xC0,0x4F,0x8E,0xDB,0x8A}; /* 20746D66-ACF3-11D3-8CD1-00C04F8EDB8A */+static const drwav_uint8 drwavGUID_W64_FACT[16] = {0x66,0x61,0x63,0x74, 0xF3,0xAC, 0xD3,0x11, 0x8C,0xD1, 0x00,0xC0,0x4F,0x8E,0xDB,0x8A}; /* 74636166-ACF3-11D3-8CD1-00C04F8EDB8A */+static const drwav_uint8 drwavGUID_W64_DATA[16] = {0x64,0x61,0x74,0x61, 0xF3,0xAC, 0xD3,0x11, 0x8C,0xD1, 0x00,0xC0,0x4F,0x8E,0xDB,0x8A}; /* 61746164-ACF3-11D3-8CD1-00C04F8EDB8A */+/*static const drwav_uint8 drwavGUID_W64_SMPL[16] = {0x73,0x6D,0x70,0x6C, 0xF3,0xAC, 0xD3,0x11, 0x8C,0xD1, 0x00,0xC0,0x4F,0x8E,0xDB,0x8A};*/ /* 6C706D73-ACF3-11D3-8CD1-00C04F8EDB8A */+
+
+static DRWAV_INLINE int drwav__is_little_endian(void)
+{+#if defined(DRWAV_X86) || defined(DRWAV_X64)
+ return DRWAV_TRUE;
+#elif defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && __BYTE_ORDER == __LITTLE_ENDIAN
+ return DRWAV_TRUE;
+#else
+ int n = 1;
+ return (*(char*)&n) == 1;
+#endif
+}
+
+
+static DRWAV_INLINE void drwav_bytes_to_guid(const drwav_uint8* data, drwav_uint8* guid)
+{+ int i;
+ for (i = 0; i < 16; ++i) {+ guid[i] = data[i];
+ }
+}
+
+
+static DRWAV_INLINE drwav_uint16 drwav__bswap16(drwav_uint16 n)
+{+#ifdef DRWAV_HAS_BYTESWAP16_INTRINSIC
+ #if defined(_MSC_VER)
+ return _byteswap_ushort(n);
+ #elif defined(__GNUC__) || defined(__clang__)
+ return __builtin_bswap16(n);
+ #else
+ #error "This compiler does not support the byte swap intrinsic."
+ #endif
+#else
+ return ((n & 0xFF00) >> 8) |
+ ((n & 0x00FF) << 8);
+#endif
+}
+
+static DRWAV_INLINE drwav_uint32 drwav__bswap32(drwav_uint32 n)
+{+#ifdef DRWAV_HAS_BYTESWAP32_INTRINSIC
+ #if defined(_MSC_VER)
+ return _byteswap_ulong(n);
+ #elif defined(__GNUC__) || defined(__clang__)
+ #if defined(DRWAV_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 6) && !defined(DRWAV_64BIT) /* <-- 64-bit inline assembly has not been tested, so disabling for now. */
+ /* Inline assembly optimized implementation for ARM. In my testing, GCC does not generate optimized code with __builtin_bswap32(). */
+ drwav_uint32 r;
+ __asm__ __volatile__ (
+ #if defined(DRWAV_64BIT)
+ "rev %w[out], %w[in]" : [out]"=r"(r) : [in]"r"(n) /* <-- This is untested. If someone in the community could test this, that would be appreciated! */
+ #else
+ "rev %[out], %[in]" : [out]"=r"(r) : [in]"r"(n)
+ #endif
+ );
+ return r;
+ #else
+ return __builtin_bswap32(n);
+ #endif
+ #else
+ #error "This compiler does not support the byte swap intrinsic."
+ #endif
+#else
+ return ((n & 0xFF000000) >> 24) |
+ ((n & 0x00FF0000) >> 8) |
+ ((n & 0x0000FF00) << 8) |
+ ((n & 0x000000FF) << 24);
+#endif
+}
+
+static DRWAV_INLINE drwav_uint64 drwav__bswap64(drwav_uint64 n)
+{+#ifdef DRWAV_HAS_BYTESWAP64_INTRINSIC
+ #if defined(_MSC_VER)
+ return _byteswap_uint64(n);
+ #elif defined(__GNUC__) || defined(__clang__)
+ return __builtin_bswap64(n);
+ #else
+ #error "This compiler does not support the byte swap intrinsic."
+ #endif
+#else
+ /* Weird "<< 32" bitshift is required for C89 because it doesn't support 64-bit constants. Should be optimized out by a good compiler. */
+ return ((n & ((drwav_uint64)0xFF000000 << 32)) >> 56) |
+ ((n & ((drwav_uint64)0x00FF0000 << 32)) >> 40) |
+ ((n & ((drwav_uint64)0x0000FF00 << 32)) >> 24) |
+ ((n & ((drwav_uint64)0x000000FF << 32)) >> 8) |
+ ((n & ((drwav_uint64)0xFF000000 )) << 8) |
+ ((n & ((drwav_uint64)0x00FF0000 )) << 24) |
+ ((n & ((drwav_uint64)0x0000FF00 )) << 40) |
+ ((n & ((drwav_uint64)0x000000FF )) << 56);
+#endif
+}
+
+
+static DRWAV_INLINE drwav_int16 drwav__bswap_s16(drwav_int16 n)
+{+ return (drwav_int16)drwav__bswap16((drwav_uint16)n);
+}
+
+static DRWAV_INLINE void drwav__bswap_samples_s16(drwav_int16* pSamples, drwav_uint64 sampleCount)
+{+ drwav_uint64 iSample;
+ for (iSample = 0; iSample < sampleCount; iSample += 1) {+ pSamples[iSample] = drwav__bswap_s16(pSamples[iSample]);
+ }
+}
+
+
+static DRWAV_INLINE void drwav__bswap_s24(drwav_uint8* p)
+{+ drwav_uint8 t;
+ t = p[0];
+ p[0] = p[2];
+ p[2] = t;
+}
+
+static DRWAV_INLINE void drwav__bswap_samples_s24(drwav_uint8* pSamples, drwav_uint64 sampleCount)
+{+ drwav_uint64 iSample;
+ for (iSample = 0; iSample < sampleCount; iSample += 1) {+ drwav_uint8* pSample = pSamples + (iSample*3);
+ drwav__bswap_s24(pSample);
+ }
+}
+
+
+static DRWAV_INLINE drwav_int32 drwav__bswap_s32(drwav_int32 n)
+{+ return (drwav_int32)drwav__bswap32((drwav_uint32)n);
+}
+
+static DRWAV_INLINE void drwav__bswap_samples_s32(drwav_int32* pSamples, drwav_uint64 sampleCount)
+{+ drwav_uint64 iSample;
+ for (iSample = 0; iSample < sampleCount; iSample += 1) {+ pSamples[iSample] = drwav__bswap_s32(pSamples[iSample]);
+ }
+}
+
+
+static DRWAV_INLINE float drwav__bswap_f32(float n)
+{+ union {+ drwav_uint32 i;
+ float f;
+ } x;
+ x.f = n;
+ x.i = drwav__bswap32(x.i);
+
+ return x.f;
+}
+
+static DRWAV_INLINE void drwav__bswap_samples_f32(float* pSamples, drwav_uint64 sampleCount)
+{+ drwav_uint64 iSample;
+ for (iSample = 0; iSample < sampleCount; iSample += 1) {+ pSamples[iSample] = drwav__bswap_f32(pSamples[iSample]);
+ }
+}
+
+
+static DRWAV_INLINE double drwav__bswap_f64(double n)
+{+ union {+ drwav_uint64 i;
+ double f;
+ } x;
+ x.f = n;
+ x.i = drwav__bswap64(x.i);
+
+ return x.f;
+}
+
+static DRWAV_INLINE void drwav__bswap_samples_f64(double* pSamples, drwav_uint64 sampleCount)
+{+ drwav_uint64 iSample;
+ for (iSample = 0; iSample < sampleCount; iSample += 1) {+ pSamples[iSample] = drwav__bswap_f64(pSamples[iSample]);
+ }
+}
+
+
+static DRWAV_INLINE void drwav__bswap_samples_pcm(void* pSamples, drwav_uint64 sampleCount, drwav_uint32 bytesPerSample)
+{+ /* Assumes integer PCM. Floating point PCM is done in drwav__bswap_samples_ieee(). */
+ switch (bytesPerSample)
+ {+ case 1: /* u8 */
+ {+ /* no-op. */
+ } break;
+ case 2: /* s16, s12 (loosely packed) */
+ {+ drwav__bswap_samples_s16((drwav_int16*)pSamples, sampleCount);
+ } break;
+ case 3: /* s24 */
+ {+ drwav__bswap_samples_s24((drwav_uint8*)pSamples, sampleCount);
+ } break;
+ case 4: /* s32 */
+ {+ drwav__bswap_samples_s32((drwav_int32*)pSamples, sampleCount);
+ } break;
+ default:
+ {+ /* Unsupported format. */
+ DRWAV_ASSERT(DRWAV_FALSE);
+ } break;
+ }
+}
+
+static DRWAV_INLINE void drwav__bswap_samples_ieee(void* pSamples, drwav_uint64 sampleCount, drwav_uint32 bytesPerSample)
+{+ switch (bytesPerSample)
+ {+ #if 0 /* Contributions welcome for f16 support. */
+ case 2: /* f16 */
+ {+ drwav__bswap_samples_f16((drwav_float16*)pSamples, sampleCount);
+ } break;
+ #endif
+ case 4: /* f32 */
+ {+ drwav__bswap_samples_f32((float*)pSamples, sampleCount);
+ } break;
+ case 8: /* f64 */
+ {+ drwav__bswap_samples_f64((double*)pSamples, sampleCount);
+ } break;
+ default:
+ {+ /* Unsupported format. */
+ DRWAV_ASSERT(DRWAV_FALSE);
+ } break;
+ }
+}
+
+static DRWAV_INLINE void drwav__bswap_samples(void* pSamples, drwav_uint64 sampleCount, drwav_uint32 bytesPerSample, drwav_uint16 format)
+{+ switch (format)
+ {+ case DR_WAVE_FORMAT_PCM:
+ {+ drwav__bswap_samples_pcm(pSamples, sampleCount, bytesPerSample);
+ } break;
+
+ case DR_WAVE_FORMAT_IEEE_FLOAT:
+ {+ drwav__bswap_samples_ieee(pSamples, sampleCount, bytesPerSample);
+ } break;
+
+ case DR_WAVE_FORMAT_ALAW:
+ case DR_WAVE_FORMAT_MULAW:
+ {+ drwav__bswap_samples_s16((drwav_int16*)pSamples, sampleCount);
+ } break;
+
+ case DR_WAVE_FORMAT_ADPCM:
+ case DR_WAVE_FORMAT_DVI_ADPCM:
+ default:
+ {+ /* Unsupported format. */
+ DRWAV_ASSERT(DRWAV_FALSE);
+ } break;
+ }
+}
+
+
+DRWAV_PRIVATE void* drwav__malloc_default(size_t sz, void* pUserData)
+{+ (void)pUserData;
+ return DRWAV_MALLOC(sz);
+}
+
+DRWAV_PRIVATE void* drwav__realloc_default(void* p, size_t sz, void* pUserData)
+{+ (void)pUserData;
+ return DRWAV_REALLOC(p, sz);
+}
+
+DRWAV_PRIVATE void drwav__free_default(void* p, void* pUserData)
+{+ (void)pUserData;
+ DRWAV_FREE(p);
+}
+
+
+DRWAV_PRIVATE void* drwav__malloc_from_callbacks(size_t sz, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pAllocationCallbacks == NULL) {+ return NULL;
+ }
+
+ if (pAllocationCallbacks->onMalloc != NULL) {+ return pAllocationCallbacks->onMalloc(sz, pAllocationCallbacks->pUserData);
+ }
+
+ /* Try using realloc(). */
+ if (pAllocationCallbacks->onRealloc != NULL) {+ return pAllocationCallbacks->onRealloc(NULL, sz, pAllocationCallbacks->pUserData);
+ }
+
+ return NULL;
+}
+
+DRWAV_PRIVATE void* drwav__realloc_from_callbacks(void* p, size_t szNew, size_t szOld, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pAllocationCallbacks == NULL) {+ return NULL;
+ }
+
+ if (pAllocationCallbacks->onRealloc != NULL) {+ return pAllocationCallbacks->onRealloc(p, szNew, pAllocationCallbacks->pUserData);
+ }
+
+ /* Try emulating realloc() in terms of malloc()/free(). */
+ if (pAllocationCallbacks->onMalloc != NULL && pAllocationCallbacks->onFree != NULL) {+ void* p2;
+
+ p2 = pAllocationCallbacks->onMalloc(szNew, pAllocationCallbacks->pUserData);
+ if (p2 == NULL) {+ return NULL;
+ }
+
+ if (p != NULL) {+ DRWAV_COPY_MEMORY(p2, p, szOld);
+ pAllocationCallbacks->onFree(p, pAllocationCallbacks->pUserData);
+ }
+
+ return p2;
+ }
+
+ return NULL;
+}
+
+DRWAV_PRIVATE void drwav__free_from_callbacks(void* p, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (p == NULL || pAllocationCallbacks == NULL) {+ return;
+ }
+
+ if (pAllocationCallbacks->onFree != NULL) {+ pAllocationCallbacks->onFree(p, pAllocationCallbacks->pUserData);
+ }
+}
+
+
+DRWAV_PRIVATE drwav_allocation_callbacks drwav_copy_allocation_callbacks_or_defaults(const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pAllocationCallbacks != NULL) {+ /* Copy. */
+ return *pAllocationCallbacks;
+ } else {+ /* Defaults. */
+ drwav_allocation_callbacks allocationCallbacks;
+ allocationCallbacks.pUserData = NULL;
+ allocationCallbacks.onMalloc = drwav__malloc_default;
+ allocationCallbacks.onRealloc = drwav__realloc_default;
+ allocationCallbacks.onFree = drwav__free_default;
+ return allocationCallbacks;
+ }
+}
+
+
+static DRWAV_INLINE drwav_bool32 drwav__is_compressed_format_tag(drwav_uint16 formatTag)
+{+ return
+ formatTag == DR_WAVE_FORMAT_ADPCM ||
+ formatTag == DR_WAVE_FORMAT_DVI_ADPCM;
+}
+
+DRWAV_PRIVATE unsigned int drwav__chunk_padding_size_riff(drwav_uint64 chunkSize)
+{+ return (unsigned int)(chunkSize % 2);
+}
+
+DRWAV_PRIVATE unsigned int drwav__chunk_padding_size_w64(drwav_uint64 chunkSize)
+{+ return (unsigned int)(chunkSize % 8);
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s16__msadpcm(drwav* pWav, drwav_uint64 samplesToRead, drwav_int16* pBufferOut);
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s16__ima(drwav* pWav, drwav_uint64 samplesToRead, drwav_int16* pBufferOut);
+DRWAV_PRIVATE drwav_bool32 drwav_init_write__internal(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount);
+
+DRWAV_PRIVATE drwav_result drwav__read_chunk_header(drwav_read_proc onRead, void* pUserData, drwav_container container, drwav_uint64* pRunningBytesReadOut, drwav_chunk_header* pHeaderOut)
+{+ if (container == drwav_container_riff || container == drwav_container_rf64) {+ drwav_uint8 sizeInBytes[4];
+
+ if (onRead(pUserData, pHeaderOut->id.fourcc, 4) != 4) {+ return DRWAV_AT_END;
+ }
+
+ if (onRead(pUserData, sizeInBytes, 4) != 4) {+ return DRWAV_INVALID_FILE;
+ }
+
+ pHeaderOut->sizeInBytes = drwav_bytes_to_u32(sizeInBytes);
+ pHeaderOut->paddingSize = drwav__chunk_padding_size_riff(pHeaderOut->sizeInBytes);
+ *pRunningBytesReadOut += 8;
+ } else {+ drwav_uint8 sizeInBytes[8];
+
+ if (onRead(pUserData, pHeaderOut->id.guid, 16) != 16) {+ return DRWAV_AT_END;
+ }
+
+ if (onRead(pUserData, sizeInBytes, 8) != 8) {+ return DRWAV_INVALID_FILE;
+ }
+
+ pHeaderOut->sizeInBytes = drwav_bytes_to_u64(sizeInBytes) - 24; /* <-- Subtract 24 because w64 includes the size of the header. */
+ pHeaderOut->paddingSize = drwav__chunk_padding_size_w64(pHeaderOut->sizeInBytes);
+ *pRunningBytesReadOut += 24;
+ }
+
+ return DRWAV_SUCCESS;
+}
+
+DRWAV_PRIVATE drwav_bool32 drwav__seek_forward(drwav_seek_proc onSeek, drwav_uint64 offset, void* pUserData)
+{+ drwav_uint64 bytesRemainingToSeek = offset;
+ while (bytesRemainingToSeek > 0) {+ if (bytesRemainingToSeek > 0x7FFFFFFF) {+ if (!onSeek(pUserData, 0x7FFFFFFF, drwav_seek_origin_current)) {+ return DRWAV_FALSE;
+ }
+ bytesRemainingToSeek -= 0x7FFFFFFF;
+ } else {+ if (!onSeek(pUserData, (int)bytesRemainingToSeek, drwav_seek_origin_current)) {+ return DRWAV_FALSE;
+ }
+ bytesRemainingToSeek = 0;
+ }
+ }
+
+ return DRWAV_TRUE;
+}
+
+DRWAV_PRIVATE drwav_bool32 drwav__seek_from_start(drwav_seek_proc onSeek, drwav_uint64 offset, void* pUserData)
+{+ if (offset <= 0x7FFFFFFF) {+ return onSeek(pUserData, (int)offset, drwav_seek_origin_start);
+ }
+
+ /* Larger than 32-bit seek. */
+ if (!onSeek(pUserData, 0x7FFFFFFF, drwav_seek_origin_start)) {+ return DRWAV_FALSE;
+ }
+ offset -= 0x7FFFFFFF;
+
+ for (;;) {+ if (offset <= 0x7FFFFFFF) {+ return onSeek(pUserData, (int)offset, drwav_seek_origin_current);
+ }
+
+ if (!onSeek(pUserData, 0x7FFFFFFF, drwav_seek_origin_current)) {+ return DRWAV_FALSE;
+ }
+ offset -= 0x7FFFFFFF;
+ }
+
+ /* Should never get here. */
+ /*return DRWAV_TRUE; */
+}
+
+
+DRWAV_PRIVATE drwav_bool32 drwav__read_fmt(drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, drwav_container container, drwav_uint64* pRunningBytesReadOut, drwav_fmt* fmtOut)
+{+ drwav_chunk_header header;
+ drwav_uint8 fmt[16];
+
+ if (drwav__read_chunk_header(onRead, pUserData, container, pRunningBytesReadOut, &header) != DRWAV_SUCCESS) {+ return DRWAV_FALSE;
+ }
+
+
+ /* Skip non-fmt chunks. */
+ while (((container == drwav_container_riff || container == drwav_container_rf64) && !drwav_fourcc_equal(header.id.fourcc, "fmt ")) || (container == drwav_container_w64 && !drwav_guid_equal(header.id.guid, drwavGUID_W64_FMT))) {+ if (!drwav__seek_forward(onSeek, header.sizeInBytes + header.paddingSize, pUserData)) {+ return DRWAV_FALSE;
+ }
+ *pRunningBytesReadOut += header.sizeInBytes + header.paddingSize;
+
+ /* Try the next header. */
+ if (drwav__read_chunk_header(onRead, pUserData, container, pRunningBytesReadOut, &header) != DRWAV_SUCCESS) {+ return DRWAV_FALSE;
+ }
+ }
+
+
+ /* Validation. */
+ if (container == drwav_container_riff || container == drwav_container_rf64) {+ if (!drwav_fourcc_equal(header.id.fourcc, "fmt ")) {+ return DRWAV_FALSE;
+ }
+ } else {+ if (!drwav_guid_equal(header.id.guid, drwavGUID_W64_FMT)) {+ return DRWAV_FALSE;
+ }
+ }
+
+
+ if (onRead(pUserData, fmt, sizeof(fmt)) != sizeof(fmt)) {+ return DRWAV_FALSE;
+ }
+ *pRunningBytesReadOut += sizeof(fmt);
+
+ fmtOut->formatTag = drwav_bytes_to_u16(fmt + 0);
+ fmtOut->channels = drwav_bytes_to_u16(fmt + 2);
+ fmtOut->sampleRate = drwav_bytes_to_u32(fmt + 4);
+ fmtOut->avgBytesPerSec = drwav_bytes_to_u32(fmt + 8);
+ fmtOut->blockAlign = drwav_bytes_to_u16(fmt + 12);
+ fmtOut->bitsPerSample = drwav_bytes_to_u16(fmt + 14);
+
+ fmtOut->extendedSize = 0;
+ fmtOut->validBitsPerSample = 0;
+ fmtOut->channelMask = 0;
+ DRWAV_ZERO_MEMORY(fmtOut->subFormat, sizeof(fmtOut->subFormat));
+
+ if (header.sizeInBytes > 16) {+ drwav_uint8 fmt_cbSize[2];
+ int bytesReadSoFar = 0;
+
+ if (onRead(pUserData, fmt_cbSize, sizeof(fmt_cbSize)) != sizeof(fmt_cbSize)) {+ return DRWAV_FALSE; /* Expecting more data. */
+ }
+ *pRunningBytesReadOut += sizeof(fmt_cbSize);
+
+ bytesReadSoFar = 18;
+
+ fmtOut->extendedSize = drwav_bytes_to_u16(fmt_cbSize);
+ if (fmtOut->extendedSize > 0) {+ /* Simple validation. */
+ if (fmtOut->formatTag == DR_WAVE_FORMAT_EXTENSIBLE) {+ if (fmtOut->extendedSize != 22) {+ return DRWAV_FALSE;
+ }
+ }
+
+ if (fmtOut->formatTag == DR_WAVE_FORMAT_EXTENSIBLE) {+ drwav_uint8 fmtext[22];
+ if (onRead(pUserData, fmtext, fmtOut->extendedSize) != fmtOut->extendedSize) {+ return DRWAV_FALSE; /* Expecting more data. */
+ }
+
+ fmtOut->validBitsPerSample = drwav_bytes_to_u16(fmtext + 0);
+ fmtOut->channelMask = drwav_bytes_to_u32(fmtext + 2);
+ drwav_bytes_to_guid(fmtext + 6, fmtOut->subFormat);
+ } else {+ if (!onSeek(pUserData, fmtOut->extendedSize, drwav_seek_origin_current)) {+ return DRWAV_FALSE;
+ }
+ }
+ *pRunningBytesReadOut += fmtOut->extendedSize;
+
+ bytesReadSoFar += fmtOut->extendedSize;
+ }
+
+ /* Seek past any leftover bytes. For w64 the leftover will be defined based on the chunk size. */
+ if (!onSeek(pUserData, (int)(header.sizeInBytes - bytesReadSoFar), drwav_seek_origin_current)) {+ return DRWAV_FALSE;
+ }
+ *pRunningBytesReadOut += (header.sizeInBytes - bytesReadSoFar);
+ }
+
+ if (header.paddingSize > 0) {+ if (!onSeek(pUserData, header.paddingSize, drwav_seek_origin_current)) {+ return DRWAV_FALSE;
+ }
+ *pRunningBytesReadOut += header.paddingSize;
+ }
+
+ return DRWAV_TRUE;
+}
+
+
+DRWAV_PRIVATE size_t drwav__on_read(drwav_read_proc onRead, void* pUserData, void* pBufferOut, size_t bytesToRead, drwav_uint64* pCursor)
+{+ size_t bytesRead;
+
+ DRWAV_ASSERT(onRead != NULL);
+ DRWAV_ASSERT(pCursor != NULL);
+
+ bytesRead = onRead(pUserData, pBufferOut, bytesToRead);
+ *pCursor += bytesRead;
+ return bytesRead;
+}
+
+#if 0
+DRWAV_PRIVATE drwav_bool32 drwav__on_seek(drwav_seek_proc onSeek, void* pUserData, int offset, drwav_seek_origin origin, drwav_uint64* pCursor)
+{+ DRWAV_ASSERT(onSeek != NULL);
+ DRWAV_ASSERT(pCursor != NULL);
+
+ if (!onSeek(pUserData, offset, origin)) {+ return DRWAV_FALSE;
+ }
+
+ if (origin == drwav_seek_origin_start) {+ *pCursor = offset;
+ } else {+ *pCursor += offset;
+ }
+
+ return DRWAV_TRUE;
+}
+#endif
+
+
+#define DRWAV_SMPL_BYTES 36
+#define DRWAV_SMPL_LOOP_BYTES 24
+#define DRWAV_INST_BYTES 7
+#define DRWAV_ACID_BYTES 24
+#define DRWAV_CUE_BYTES 4
+#define DRWAV_BEXT_BYTES 602
+#define DRWAV_BEXT_DESCRIPTION_BYTES 256
+#define DRWAV_BEXT_ORIGINATOR_NAME_BYTES 32
+#define DRWAV_BEXT_ORIGINATOR_REF_BYTES 32
+#define DRWAV_BEXT_RESERVED_BYTES 180
+#define DRWAV_BEXT_UMID_BYTES 64
+#define DRWAV_CUE_POINT_BYTES 24
+#define DRWAV_LIST_LABEL_OR_NOTE_BYTES 4
+#define DRWAV_LIST_LABELLED_TEXT_BYTES 20
+
+#define DRWAV_METADATA_ALIGNMENT 8
+
+typedef enum
+{+ drwav__metadata_parser_stage_count,
+ drwav__metadata_parser_stage_read
+} drwav__metadata_parser_stage;
+
+typedef struct
+{+ drwav_read_proc onRead;
+ drwav_seek_proc onSeek;
+ void *pReadSeekUserData;
+ drwav__metadata_parser_stage stage;
+ drwav_metadata *pMetadata;
+ drwav_uint32 metadataCount;
+ drwav_uint8 *pData;
+ drwav_uint8 *pDataCursor;
+ drwav_uint64 metadataCursor;
+ drwav_uint64 extraCapacity;
+} drwav__metadata_parser;
+
+DRWAV_PRIVATE size_t drwav__metadata_memory_capacity(drwav__metadata_parser* pParser)
+{+ drwav_uint64 cap = sizeof(drwav_metadata) * (drwav_uint64)pParser->metadataCount + pParser->extraCapacity;
+ if (cap > DRWAV_SIZE_MAX) {+ return 0; /* Too big. */
+ }
+
+ return (size_t)cap; /* Safe cast thanks to the check above. */
+}
+
+DRWAV_PRIVATE drwav_uint8* drwav__metadata_get_memory(drwav__metadata_parser* pParser, size_t size, size_t align)
+{+ drwav_uint8* pResult;
+
+ if (align) {+ drwav_uintptr modulo = (drwav_uintptr)pParser->pDataCursor % align;
+ if (modulo != 0) {+ pParser->pDataCursor += align - modulo;
+ }
+ }
+
+ pResult = pParser->pDataCursor;
+
+ /*
+ Getting to the point where this function is called means there should always be memory
+ available. Out of memory checks should have been done at an earlier stage.
+ */
+ DRWAV_ASSERT((pResult + size) <= (pParser->pData + drwav__metadata_memory_capacity(pParser)));
+
+ pParser->pDataCursor += size;
+ return pResult;
+}
+
+DRWAV_PRIVATE void drwav__metadata_request_extra_memory_for_stage_2(drwav__metadata_parser* pParser, size_t bytes, size_t align)
+{+ size_t extra = bytes + (align ? (align - 1) : 0);
+ pParser->extraCapacity += extra;
+}
+
+DRWAV_PRIVATE drwav_result drwav__metadata_alloc(drwav__metadata_parser* pParser, drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pParser->extraCapacity != 0 || pParser->metadataCount != 0) {+ pAllocationCallbacks->onFree(pParser->pData, pAllocationCallbacks->pUserData);
+
+ pParser->pData = (drwav_uint8*)pAllocationCallbacks->onMalloc(drwav__metadata_memory_capacity(pParser), pAllocationCallbacks->pUserData);
+ pParser->pDataCursor = pParser->pData;
+
+ if (pParser->pData == NULL) {+ return DRWAV_OUT_OF_MEMORY;
+ }
+
+ /*
+ We don't need to worry about specifying an alignment here because malloc always returns something
+ of suitable alignment. This also means than pParser->pMetadata is all that we need to store in order
+ for us to free when we are done.
+ */
+ pParser->pMetadata = (drwav_metadata*)drwav__metadata_get_memory(pParser, sizeof(drwav_metadata) * pParser->metadataCount, 1);
+ pParser->metadataCursor = 0;
+ }
+
+ return DRWAV_SUCCESS;
+}
+
+DRWAV_PRIVATE size_t drwav__metadata_parser_read(drwav__metadata_parser* pParser, void* pBufferOut, size_t bytesToRead, drwav_uint64* pCursor)
+{+ if (pCursor != NULL) {+ return drwav__on_read(pParser->onRead, pParser->pReadSeekUserData, pBufferOut, bytesToRead, pCursor);
+ } else {+ return pParser->onRead(pParser->pReadSeekUserData, pBufferOut, bytesToRead);
+ }
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__read_smpl_to_metadata_obj(drwav__metadata_parser* pParser, const drwav_chunk_header* pChunkHeader, drwav_metadata* pMetadata)
+{+ drwav_uint8 smplHeaderData[DRWAV_SMPL_BYTES];
+ drwav_uint64 totalBytesRead = 0;
+ size_t bytesJustRead = drwav__metadata_parser_read(pParser, smplHeaderData, sizeof(smplHeaderData), &totalBytesRead);
+
+ DRWAV_ASSERT(pParser->stage == drwav__metadata_parser_stage_read);
+ DRWAV_ASSERT(pChunkHeader != NULL);
+
+ if (bytesJustRead == sizeof(smplHeaderData)) {+ drwav_uint32 iSampleLoop;
+
+ pMetadata->type = drwav_metadata_type_smpl;
+ pMetadata->data.smpl.manufacturerId = drwav_bytes_to_u32(smplHeaderData + 0);
+ pMetadata->data.smpl.productId = drwav_bytes_to_u32(smplHeaderData + 4);
+ pMetadata->data.smpl.samplePeriodNanoseconds = drwav_bytes_to_u32(smplHeaderData + 8);
+ pMetadata->data.smpl.midiUnityNote = drwav_bytes_to_u32(smplHeaderData + 12);
+ pMetadata->data.smpl.midiPitchFraction = drwav_bytes_to_u32(smplHeaderData + 16);
+ pMetadata->data.smpl.smpteFormat = drwav_bytes_to_u32(smplHeaderData + 20);
+ pMetadata->data.smpl.smpteOffset = drwav_bytes_to_u32(smplHeaderData + 24);
+ pMetadata->data.smpl.sampleLoopCount = drwav_bytes_to_u32(smplHeaderData + 28);
+ pMetadata->data.smpl.samplerSpecificDataSizeInBytes = drwav_bytes_to_u32(smplHeaderData + 32);
+
+ /*
+ The loop count needs to be validated against the size of the chunk for safety so we don't
+ attempt to read over the boundary of the chunk.
+ */
+ if (pMetadata->data.smpl.sampleLoopCount == (pChunkHeader->sizeInBytes - DRWAV_SMPL_BYTES) / DRWAV_SMPL_LOOP_BYTES) {+ pMetadata->data.smpl.pLoops = (drwav_smpl_loop*)drwav__metadata_get_memory(pParser, sizeof(drwav_smpl_loop) * pMetadata->data.smpl.sampleLoopCount, DRWAV_METADATA_ALIGNMENT);
+
+ for (iSampleLoop = 0; iSampleLoop < pMetadata->data.smpl.sampleLoopCount; ++iSampleLoop) {+ drwav_uint8 smplLoopData[DRWAV_SMPL_LOOP_BYTES];
+ bytesJustRead = drwav__metadata_parser_read(pParser, smplLoopData, sizeof(smplLoopData), &totalBytesRead);
+
+ if (bytesJustRead == sizeof(smplLoopData)) {+ pMetadata->data.smpl.pLoops[iSampleLoop].cuePointId = drwav_bytes_to_u32(smplLoopData + 0);
+ pMetadata->data.smpl.pLoops[iSampleLoop].type = drwav_bytes_to_u32(smplLoopData + 4);
+ pMetadata->data.smpl.pLoops[iSampleLoop].firstSampleByteOffset = drwav_bytes_to_u32(smplLoopData + 8);
+ pMetadata->data.smpl.pLoops[iSampleLoop].lastSampleByteOffset = drwav_bytes_to_u32(smplLoopData + 12);
+ pMetadata->data.smpl.pLoops[iSampleLoop].sampleFraction = drwav_bytes_to_u32(smplLoopData + 16);
+ pMetadata->data.smpl.pLoops[iSampleLoop].playCount = drwav_bytes_to_u32(smplLoopData + 20);
+ } else {+ break;
+ }
+ }
+
+ if (pMetadata->data.smpl.samplerSpecificDataSizeInBytes > 0) {+ pMetadata->data.smpl.pSamplerSpecificData = drwav__metadata_get_memory(pParser, pMetadata->data.smpl.samplerSpecificDataSizeInBytes, 1);
+ DRWAV_ASSERT(pMetadata->data.smpl.pSamplerSpecificData != NULL);
+
+ drwav__metadata_parser_read(pParser, pMetadata->data.smpl.pSamplerSpecificData, pMetadata->data.smpl.samplerSpecificDataSizeInBytes, &totalBytesRead);
+ }
+ }
+ }
+
+ return totalBytesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__read_cue_to_metadata_obj(drwav__metadata_parser* pParser, const drwav_chunk_header* pChunkHeader, drwav_metadata* pMetadata)
+{+ drwav_uint8 cueHeaderSectionData[DRWAV_CUE_BYTES];
+ drwav_uint64 totalBytesRead = 0;
+ size_t bytesJustRead = drwav__metadata_parser_read(pParser, cueHeaderSectionData, sizeof(cueHeaderSectionData), &totalBytesRead);
+
+ DRWAV_ASSERT(pParser->stage == drwav__metadata_parser_stage_read);
+
+ if (bytesJustRead == sizeof(cueHeaderSectionData)) {+ pMetadata->type = drwav_metadata_type_cue;
+ pMetadata->data.cue.cuePointCount = drwav_bytes_to_u32(cueHeaderSectionData);
+
+ /*
+ We need to validate the cue point count against the size of the chunk so we don't read
+ beyond the chunk.
+ */
+ if (pMetadata->data.cue.cuePointCount == (pChunkHeader->sizeInBytes - DRWAV_CUE_BYTES) / DRWAV_CUE_POINT_BYTES) {+ pMetadata->data.cue.pCuePoints = (drwav_cue_point*)drwav__metadata_get_memory(pParser, sizeof(drwav_cue_point) * pMetadata->data.cue.cuePointCount, DRWAV_METADATA_ALIGNMENT);
+ DRWAV_ASSERT(pMetadata->data.cue.pCuePoints != NULL);
+
+ if (pMetadata->data.cue.cuePointCount > 0) {+ drwav_uint32 iCuePoint;
+
+ for (iCuePoint = 0; iCuePoint < pMetadata->data.cue.cuePointCount; ++iCuePoint) {+ drwav_uint8 cuePointData[DRWAV_CUE_POINT_BYTES];
+ bytesJustRead = drwav__metadata_parser_read(pParser, cuePointData, sizeof(cuePointData), &totalBytesRead);
+
+ if (bytesJustRead == sizeof(cuePointData)) {+ pMetadata->data.cue.pCuePoints[iCuePoint].id = drwav_bytes_to_u32(cuePointData + 0);
+ pMetadata->data.cue.pCuePoints[iCuePoint].playOrderPosition = drwav_bytes_to_u32(cuePointData + 4);
+ pMetadata->data.cue.pCuePoints[iCuePoint].dataChunkId[0] = cuePointData[8];
+ pMetadata->data.cue.pCuePoints[iCuePoint].dataChunkId[1] = cuePointData[9];
+ pMetadata->data.cue.pCuePoints[iCuePoint].dataChunkId[2] = cuePointData[10];
+ pMetadata->data.cue.pCuePoints[iCuePoint].dataChunkId[3] = cuePointData[11];
+ pMetadata->data.cue.pCuePoints[iCuePoint].chunkStart = drwav_bytes_to_u32(cuePointData + 12);
+ pMetadata->data.cue.pCuePoints[iCuePoint].blockStart = drwav_bytes_to_u32(cuePointData + 16);
+ pMetadata->data.cue.pCuePoints[iCuePoint].sampleByteOffset = drwav_bytes_to_u32(cuePointData + 20);
+ } else {+ break;
+ }
+ }
+ }
+ }
+ }
+
+ return totalBytesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__read_inst_to_metadata_obj(drwav__metadata_parser* pParser, drwav_metadata* pMetadata)
+{+ drwav_uint8 instData[DRWAV_INST_BYTES];
+ drwav_uint64 bytesRead = drwav__metadata_parser_read(pParser, instData, sizeof(instData), NULL);
+
+ DRWAV_ASSERT(pParser->stage == drwav__metadata_parser_stage_read);
+
+ if (bytesRead == sizeof(instData)) {+ pMetadata->type = drwav_metadata_type_inst;
+ pMetadata->data.inst.midiUnityNote = (drwav_int8)instData[0];
+ pMetadata->data.inst.fineTuneCents = (drwav_int8)instData[1];
+ pMetadata->data.inst.gainDecibels = (drwav_int8)instData[2];
+ pMetadata->data.inst.lowNote = (drwav_int8)instData[3];
+ pMetadata->data.inst.highNote = (drwav_int8)instData[4];
+ pMetadata->data.inst.lowVelocity = (drwav_int8)instData[5];
+ pMetadata->data.inst.highVelocity = (drwav_int8)instData[6];
+ }
+
+ return bytesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__read_acid_to_metadata_obj(drwav__metadata_parser* pParser, drwav_metadata* pMetadata)
+{+ drwav_uint8 acidData[DRWAV_ACID_BYTES];
+ drwav_uint64 bytesRead = drwav__metadata_parser_read(pParser, acidData, sizeof(acidData), NULL);
+
+ DRWAV_ASSERT(pParser->stage == drwav__metadata_parser_stage_read);
+
+ if (bytesRead == sizeof(acidData)) {+ pMetadata->type = drwav_metadata_type_acid;
+ pMetadata->data.acid.flags = drwav_bytes_to_u32(acidData + 0);
+ pMetadata->data.acid.midiUnityNote = drwav_bytes_to_u16(acidData + 4);
+ pMetadata->data.acid.reserved1 = drwav_bytes_to_u16(acidData + 6);
+ pMetadata->data.acid.reserved2 = drwav_bytes_to_f32(acidData + 8);
+ pMetadata->data.acid.numBeats = drwav_bytes_to_u32(acidData + 12);
+ pMetadata->data.acid.meterDenominator = drwav_bytes_to_u16(acidData + 16);
+ pMetadata->data.acid.meterNumerator = drwav_bytes_to_u16(acidData + 18);
+ pMetadata->data.acid.tempo = drwav_bytes_to_f32(acidData + 20);
+ }
+
+ return bytesRead;
+}
+
+DRWAV_PRIVATE size_t drwav__strlen(const char* str)
+{+ size_t result = 0;
+
+ while (*str++) {+ result += 1;
+ }
+
+ return result;
+}
+
+DRWAV_PRIVATE size_t drwav__strlen_clamped(const char* str, size_t maxToRead)
+{+ size_t result = 0;
+
+ while (*str++ && result < maxToRead) {+ result += 1;
+ }
+
+ return result;
+}
+
+DRWAV_PRIVATE char* drwav__metadata_copy_string(drwav__metadata_parser* pParser, const char* str, size_t maxToRead)
+{+ size_t len = drwav__strlen_clamped(str, maxToRead);
+
+ if (len) {+ char* result = (char*)drwav__metadata_get_memory(pParser, len + 1, 1);
+ DRWAV_ASSERT(result != NULL);
+
+ DRWAV_COPY_MEMORY(result, str, len);
+ result[len] = '\0';
+
+ return result;
+ } else {+ return NULL;
+ }
+}
+
+typedef struct
+{+ const void* pBuffer;
+ size_t sizeInBytes;
+ size_t cursor;
+} drwav_buffer_reader;
+
+DRWAV_PRIVATE drwav_result drwav_buffer_reader_init(const void* pBuffer, size_t sizeInBytes, drwav_buffer_reader* pReader)
+{+ DRWAV_ASSERT(pBuffer != NULL);
+ DRWAV_ASSERT(pReader != NULL);
+
+ DRWAV_ZERO_OBJECT(pReader);
+
+ pReader->pBuffer = pBuffer;
+ pReader->sizeInBytes = sizeInBytes;
+ pReader->cursor = 0;
+
+ return DRWAV_SUCCESS;
+}
+
+DRWAV_PRIVATE const void* drwav_buffer_reader_ptr(const drwav_buffer_reader* pReader)
+{+ DRWAV_ASSERT(pReader != NULL);
+
+ return drwav_offset_ptr(pReader->pBuffer, pReader->cursor);
+}
+
+DRWAV_PRIVATE drwav_result drwav_buffer_reader_seek(drwav_buffer_reader* pReader, size_t bytesToSeek)
+{+ DRWAV_ASSERT(pReader != NULL);
+
+ if (pReader->cursor + bytesToSeek > pReader->sizeInBytes) {+ return DRWAV_BAD_SEEK; /* Seeking too far forward. */
+ }
+
+ pReader->cursor += bytesToSeek;
+
+ return DRWAV_SUCCESS;
+}
+
+DRWAV_PRIVATE drwav_result drwav_buffer_reader_read(drwav_buffer_reader* pReader, void* pDst, size_t bytesToRead, size_t* pBytesRead)
+{+ drwav_result result = DRWAV_SUCCESS;
+ size_t bytesRemaining;
+
+ DRWAV_ASSERT(pReader != NULL);
+
+ if (pBytesRead != NULL) {+ *pBytesRead = 0;
+ }
+
+ bytesRemaining = (pReader->sizeInBytes - pReader->cursor);
+ if (bytesToRead > bytesRemaining) {+ bytesToRead = bytesRemaining;
+ }
+
+ if (pDst == NULL) {+ /* Seek. */
+ result = drwav_buffer_reader_seek(pReader, bytesToRead);
+ } else {+ /* Read. */
+ DRWAV_COPY_MEMORY(pDst, drwav_buffer_reader_ptr(pReader), bytesToRead);
+ pReader->cursor += bytesToRead;
+ }
+
+ DRWAV_ASSERT(pReader->cursor <= pReader->sizeInBytes);
+
+ if (result == DRWAV_SUCCESS) {+ if (pBytesRead != NULL) {+ *pBytesRead = bytesToRead;
+ }
+ }
+
+ return DRWAV_SUCCESS;
+}
+
+DRWAV_PRIVATE drwav_result drwav_buffer_reader_read_u16(drwav_buffer_reader* pReader, drwav_uint16* pDst)
+{+ drwav_result result;
+ size_t bytesRead;
+ drwav_uint8 data[2];
+
+ DRWAV_ASSERT(pReader != NULL);
+ DRWAV_ASSERT(pDst != NULL);
+
+ *pDst = 0; /* Safety. */
+
+ result = drwav_buffer_reader_read(pReader, data, sizeof(*pDst), &bytesRead);
+ if (result != DRWAV_SUCCESS || bytesRead != sizeof(*pDst)) {+ return result;
+ }
+
+ *pDst = drwav_bytes_to_u16(data);
+
+ return DRWAV_SUCCESS;
+}
+
+DRWAV_PRIVATE drwav_result drwav_buffer_reader_read_u32(drwav_buffer_reader* pReader, drwav_uint32* pDst)
+{+ drwav_result result;
+ size_t bytesRead;
+ drwav_uint8 data[4];
+
+ DRWAV_ASSERT(pReader != NULL);
+ DRWAV_ASSERT(pDst != NULL);
+
+ *pDst = 0; /* Safety. */
+
+ result = drwav_buffer_reader_read(pReader, data, sizeof(*pDst), &bytesRead);
+ if (result != DRWAV_SUCCESS || bytesRead != sizeof(*pDst)) {+ return result;
+ }
+
+ *pDst = drwav_bytes_to_u32(data);
+
+ return DRWAV_SUCCESS;
+}
+
+
+
+DRWAV_PRIVATE drwav_uint64 drwav__read_bext_to_metadata_obj(drwav__metadata_parser* pParser, drwav_metadata* pMetadata, drwav_uint64 chunkSize)
+{+ drwav_uint8 bextData[DRWAV_BEXT_BYTES];
+ size_t bytesRead = drwav__metadata_parser_read(pParser, bextData, sizeof(bextData), NULL);
+
+ DRWAV_ASSERT(pParser->stage == drwav__metadata_parser_stage_read);
+
+ if (bytesRead == sizeof(bextData)) {+ drwav_buffer_reader reader;
+ drwav_uint32 timeReferenceLow;
+ drwav_uint32 timeReferenceHigh;
+ size_t extraBytes;
+
+ pMetadata->type = drwav_metadata_type_bext;
+
+ if (drwav_buffer_reader_init(bextData, bytesRead, &reader) == DRWAV_SUCCESS) {+ pMetadata->data.bext.pDescription = drwav__metadata_copy_string(pParser, (const char*)drwav_buffer_reader_ptr(&reader), DRWAV_BEXT_DESCRIPTION_BYTES);
+ drwav_buffer_reader_seek(&reader, DRWAV_BEXT_DESCRIPTION_BYTES);
+
+ pMetadata->data.bext.pOriginatorName = drwav__metadata_copy_string(pParser, (const char*)drwav_buffer_reader_ptr(&reader), DRWAV_BEXT_ORIGINATOR_NAME_BYTES);
+ drwav_buffer_reader_seek(&reader, DRWAV_BEXT_ORIGINATOR_NAME_BYTES);
+
+ pMetadata->data.bext.pOriginatorReference = drwav__metadata_copy_string(pParser, (const char*)drwav_buffer_reader_ptr(&reader), DRWAV_BEXT_ORIGINATOR_REF_BYTES);
+ drwav_buffer_reader_seek(&reader, DRWAV_BEXT_ORIGINATOR_REF_BYTES);
+
+ drwav_buffer_reader_read(&reader, pMetadata->data.bext.pOriginationDate, sizeof(pMetadata->data.bext.pOriginationDate), NULL);
+ drwav_buffer_reader_read(&reader, pMetadata->data.bext.pOriginationTime, sizeof(pMetadata->data.bext.pOriginationTime), NULL);
+
+ drwav_buffer_reader_read_u32(&reader, &timeReferenceLow);
+ drwav_buffer_reader_read_u32(&reader, &timeReferenceHigh);
+ pMetadata->data.bext.timeReference = ((drwav_uint64)timeReferenceHigh << 32) + timeReferenceLow;
+
+ drwav_buffer_reader_read_u16(&reader, &pMetadata->data.bext.version);
+
+ pMetadata->data.bext.pUMID = drwav__metadata_get_memory(pParser, DRWAV_BEXT_UMID_BYTES, 1);
+ drwav_buffer_reader_read(&reader, pMetadata->data.bext.pUMID, DRWAV_BEXT_UMID_BYTES, NULL);
+
+ drwav_buffer_reader_read_u16(&reader, &pMetadata->data.bext.loudnessValue);
+ drwav_buffer_reader_read_u16(&reader, &pMetadata->data.bext.loudnessRange);
+ drwav_buffer_reader_read_u16(&reader, &pMetadata->data.bext.maxTruePeakLevel);
+ drwav_buffer_reader_read_u16(&reader, &pMetadata->data.bext.maxMomentaryLoudness);
+ drwav_buffer_reader_read_u16(&reader, &pMetadata->data.bext.maxShortTermLoudness);
+
+ DRWAV_ASSERT((drwav_offset_ptr(drwav_buffer_reader_ptr(&reader), DRWAV_BEXT_RESERVED_BYTES)) == (bextData + DRWAV_BEXT_BYTES));
+
+ extraBytes = (size_t)(chunkSize - DRWAV_BEXT_BYTES);
+ if (extraBytes > 0) {+ pMetadata->data.bext.pCodingHistory = (char*)drwav__metadata_get_memory(pParser, extraBytes + 1, 1);
+ DRWAV_ASSERT(pMetadata->data.bext.pCodingHistory != NULL);
+
+ bytesRead += drwav__metadata_parser_read(pParser, pMetadata->data.bext.pCodingHistory, extraBytes, NULL);
+ pMetadata->data.bext.codingHistorySize = (drwav_uint32)drwav__strlen(pMetadata->data.bext.pCodingHistory);
+ } else {+ pMetadata->data.bext.pCodingHistory = NULL;
+ pMetadata->data.bext.codingHistorySize = 0;
+ }
+ }
+ }
+
+ return bytesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__read_list_label_or_note_to_metadata_obj(drwav__metadata_parser* pParser, drwav_metadata* pMetadata, drwav_uint64 chunkSize, drwav_metadata_type type)
+{+ drwav_uint8 cueIDBuffer[DRWAV_LIST_LABEL_OR_NOTE_BYTES];
+ drwav_uint64 totalBytesRead = 0;
+ size_t bytesJustRead = drwav__metadata_parser_read(pParser, cueIDBuffer, sizeof(cueIDBuffer), &totalBytesRead);
+
+ DRWAV_ASSERT(pParser->stage == drwav__metadata_parser_stage_read);
+
+ if (bytesJustRead == sizeof(cueIDBuffer)) {+ drwav_uint32 sizeIncludingNullTerminator;
+
+ pMetadata->type = type;
+ pMetadata->data.labelOrNote.cuePointId = drwav_bytes_to_u32(cueIDBuffer);
+
+ sizeIncludingNullTerminator = (drwav_uint32)chunkSize - DRWAV_LIST_LABEL_OR_NOTE_BYTES;
+ if (sizeIncludingNullTerminator > 0) {+ pMetadata->data.labelOrNote.stringLength = sizeIncludingNullTerminator - 1;
+ pMetadata->data.labelOrNote.pString = (char*)drwav__metadata_get_memory(pParser, sizeIncludingNullTerminator, 1);
+ DRWAV_ASSERT(pMetadata->data.labelOrNote.pString != NULL);
+
+ drwav__metadata_parser_read(pParser, pMetadata->data.labelOrNote.pString, sizeIncludingNullTerminator, &totalBytesRead);
+ } else {+ pMetadata->data.labelOrNote.stringLength = 0;
+ pMetadata->data.labelOrNote.pString = NULL;
+ }
+ }
+
+ return totalBytesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__read_list_labelled_cue_region_to_metadata_obj(drwav__metadata_parser* pParser, drwav_metadata* pMetadata, drwav_uint64 chunkSize)
+{+ drwav_uint8 buffer[DRWAV_LIST_LABELLED_TEXT_BYTES];
+ drwav_uint64 totalBytesRead = 0;
+ size_t bytesJustRead = drwav__metadata_parser_read(pParser, buffer, sizeof(buffer), &totalBytesRead);
+
+ DRWAV_ASSERT(pParser->stage == drwav__metadata_parser_stage_read);
+
+ if (bytesJustRead == sizeof(buffer)) {+ drwav_uint32 sizeIncludingNullTerminator;
+
+ pMetadata->type = drwav_metadata_type_list_labelled_cue_region;
+ pMetadata->data.labelledCueRegion.cuePointId = drwav_bytes_to_u32(buffer + 0);
+ pMetadata->data.labelledCueRegion.sampleLength = drwav_bytes_to_u32(buffer + 4);
+ pMetadata->data.labelledCueRegion.purposeId[0] = buffer[8];
+ pMetadata->data.labelledCueRegion.purposeId[1] = buffer[9];
+ pMetadata->data.labelledCueRegion.purposeId[2] = buffer[10];
+ pMetadata->data.labelledCueRegion.purposeId[3] = buffer[11];
+ pMetadata->data.labelledCueRegion.country = drwav_bytes_to_u16(buffer + 12);
+ pMetadata->data.labelledCueRegion.language = drwav_bytes_to_u16(buffer + 14);
+ pMetadata->data.labelledCueRegion.dialect = drwav_bytes_to_u16(buffer + 16);
+ pMetadata->data.labelledCueRegion.codePage = drwav_bytes_to_u16(buffer + 18);
+
+ sizeIncludingNullTerminator = (drwav_uint32)chunkSize - DRWAV_LIST_LABELLED_TEXT_BYTES;
+ if (sizeIncludingNullTerminator > 0) {+ pMetadata->data.labelledCueRegion.stringLength = sizeIncludingNullTerminator - 1;
+ pMetadata->data.labelledCueRegion.pString = (char*)drwav__metadata_get_memory(pParser, sizeIncludingNullTerminator, 1);
+ DRWAV_ASSERT(pMetadata->data.labelledCueRegion.pString != NULL);
+
+ drwav__metadata_parser_read(pParser, pMetadata->data.labelledCueRegion.pString, sizeIncludingNullTerminator, &totalBytesRead);
+ } else {+ pMetadata->data.labelledCueRegion.stringLength = 0;
+ pMetadata->data.labelledCueRegion.pString = NULL;
+ }
+ }
+
+ return totalBytesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__metadata_process_info_text_chunk(drwav__metadata_parser* pParser, drwav_uint64 chunkSize, drwav_metadata_type type)
+{+ drwav_uint64 bytesRead = 0;
+ drwav_uint32 stringSizeWithNullTerminator = (drwav_uint32)chunkSize;
+
+ if (pParser->stage == drwav__metadata_parser_stage_count) {+ pParser->metadataCount += 1;
+ drwav__metadata_request_extra_memory_for_stage_2(pParser, stringSizeWithNullTerminator, 1);
+ } else {+ drwav_metadata* pMetadata = &pParser->pMetadata[pParser->metadataCursor];
+ pMetadata->type = type;
+ if (stringSizeWithNullTerminator > 0) {+ pMetadata->data.infoText.stringLength = stringSizeWithNullTerminator - 1;
+ pMetadata->data.infoText.pString = (char*)drwav__metadata_get_memory(pParser, stringSizeWithNullTerminator, 1);
+ DRWAV_ASSERT(pMetadata->data.infoText.pString != NULL);
+
+ bytesRead = drwav__metadata_parser_read(pParser, pMetadata->data.infoText.pString, (size_t)stringSizeWithNullTerminator, NULL);
+ if (bytesRead == chunkSize) {+ pParser->metadataCursor += 1;
+ } else {+ /* Failed to parse. */
+ }
+ } else {+ pMetadata->data.infoText.stringLength = 0;
+ pMetadata->data.infoText.pString = NULL;
+ pParser->metadataCursor += 1;
+ }
+ }
+
+ return bytesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__metadata_process_unknown_chunk(drwav__metadata_parser* pParser, const drwav_uint8* pChunkId, drwav_uint64 chunkSize, drwav_metadata_location location)
+{+ drwav_uint64 bytesRead = 0;
+
+ if (location == drwav_metadata_location_invalid) {+ return 0;
+ }
+
+ if (drwav_fourcc_equal(pChunkId, "data") || drwav_fourcc_equal(pChunkId, "fmt") || drwav_fourcc_equal(pChunkId, "fact")) {+ return 0;
+ }
+
+ if (pParser->stage == drwav__metadata_parser_stage_count) {+ pParser->metadataCount += 1;
+ drwav__metadata_request_extra_memory_for_stage_2(pParser, (size_t)chunkSize, 1);
+ } else {+ drwav_metadata* pMetadata = &pParser->pMetadata[pParser->metadataCursor];
+ pMetadata->type = drwav_metadata_type_unknown;
+ pMetadata->data.unknown.chunkLocation = location;
+ pMetadata->data.unknown.id[0] = pChunkId[0];
+ pMetadata->data.unknown.id[1] = pChunkId[1];
+ pMetadata->data.unknown.id[2] = pChunkId[2];
+ pMetadata->data.unknown.id[3] = pChunkId[3];
+ pMetadata->data.unknown.dataSizeInBytes = (drwav_uint32)chunkSize;
+ pMetadata->data.unknown.pData = (drwav_uint8 *)drwav__metadata_get_memory(pParser, (size_t)chunkSize, 1);
+ DRWAV_ASSERT(pMetadata->data.unknown.pData != NULL);
+
+ bytesRead = drwav__metadata_parser_read(pParser, pMetadata->data.unknown.pData, pMetadata->data.unknown.dataSizeInBytes, NULL);
+ if (bytesRead == pMetadata->data.unknown.dataSizeInBytes) {+ pParser->metadataCursor += 1;
+ } else {+ /* Failed to read. */
+ }
+ }
+
+ return bytesRead;
+}
+
+DRWAV_PRIVATE drwav_bool32 drwav__chunk_matches(drwav_metadata_type allowedMetadataTypes, const drwav_uint8* pChunkID, drwav_metadata_type type, const char* pID)
+{+ return (allowedMetadataTypes & type) && drwav_fourcc_equal(pChunkID, pID);
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__metadata_process_chunk(drwav__metadata_parser* pParser, const drwav_chunk_header* pChunkHeader, drwav_metadata_type allowedMetadataTypes)
+{+ const drwav_uint8 *pChunkID = pChunkHeader->id.fourcc;
+ drwav_uint64 bytesRead = 0;
+
+ if (drwav__chunk_matches(allowedMetadataTypes, pChunkID, drwav_metadata_type_smpl, "smpl")) {+ if (pChunkHeader->sizeInBytes >= DRWAV_SMPL_BYTES) {+ if (pParser->stage == drwav__metadata_parser_stage_count) {+ drwav_uint8 buffer[4];
+ size_t bytesJustRead;
+
+ if (!pParser->onSeek(pParser->pReadSeekUserData, 28, drwav_seek_origin_current)) {+ return bytesRead;
+ }
+ bytesRead += 28;
+
+ bytesJustRead = drwav__metadata_parser_read(pParser, buffer, sizeof(buffer), &bytesRead);
+ if (bytesJustRead == sizeof(buffer)) {+ drwav_uint32 loopCount = drwav_bytes_to_u32(buffer);
+ drwav_uint64 calculatedLoopCount;
+
+ /* The loop count must be validated against the size of the chunk. */
+ calculatedLoopCount = (pChunkHeader->sizeInBytes - DRWAV_SMPL_BYTES) / DRWAV_SMPL_LOOP_BYTES;
+ if (calculatedLoopCount == loopCount) {+ bytesJustRead = drwav__metadata_parser_read(pParser, buffer, sizeof(buffer), &bytesRead);
+ if (bytesJustRead == sizeof(buffer)) {+ drwav_uint32 samplerSpecificDataSizeInBytes = drwav_bytes_to_u32(buffer);
+
+ pParser->metadataCount += 1;
+ drwav__metadata_request_extra_memory_for_stage_2(pParser, sizeof(drwav_smpl_loop) * loopCount, DRWAV_METADATA_ALIGNMENT);
+ drwav__metadata_request_extra_memory_for_stage_2(pParser, samplerSpecificDataSizeInBytes, 1);
+ }
+ } else {+ /* Loop count in header does not match the size of the chunk. */
+ }
+ }
+ } else {+ bytesRead = drwav__read_smpl_to_metadata_obj(pParser, pChunkHeader, &pParser->pMetadata[pParser->metadataCursor]);
+ if (bytesRead == pChunkHeader->sizeInBytes) {+ pParser->metadataCursor += 1;
+ } else {+ /* Failed to parse. */
+ }
+ }
+ } else {+ /* Incorrectly formed chunk. */
+ }
+ } else if (drwav__chunk_matches(allowedMetadataTypes, pChunkID, drwav_metadata_type_inst, "inst")) {+ if (pChunkHeader->sizeInBytes == DRWAV_INST_BYTES) {+ if (pParser->stage == drwav__metadata_parser_stage_count) {+ pParser->metadataCount += 1;
+ } else {+ bytesRead = drwav__read_inst_to_metadata_obj(pParser, &pParser->pMetadata[pParser->metadataCursor]);
+ if (bytesRead == pChunkHeader->sizeInBytes) {+ pParser->metadataCursor += 1;
+ } else {+ /* Failed to parse. */
+ }
+ }
+ } else {+ /* Incorrectly formed chunk. */
+ }
+ } else if (drwav__chunk_matches(allowedMetadataTypes, pChunkID, drwav_metadata_type_acid, "acid")) {+ if (pChunkHeader->sizeInBytes == DRWAV_ACID_BYTES) {+ if (pParser->stage == drwav__metadata_parser_stage_count) {+ pParser->metadataCount += 1;
+ } else {+ bytesRead = drwav__read_acid_to_metadata_obj(pParser, &pParser->pMetadata[pParser->metadataCursor]);
+ if (bytesRead == pChunkHeader->sizeInBytes) {+ pParser->metadataCursor += 1;
+ } else {+ /* Failed to parse. */
+ }
+ }
+ } else {+ /* Incorrectly formed chunk. */
+ }
+ } else if (drwav__chunk_matches(allowedMetadataTypes, pChunkID, drwav_metadata_type_cue, "cue ")) {+ if (pChunkHeader->sizeInBytes >= DRWAV_CUE_BYTES) {+ if (pParser->stage == drwav__metadata_parser_stage_count) {+ size_t cueCount;
+
+ pParser->metadataCount += 1;
+ cueCount = (size_t)(pChunkHeader->sizeInBytes - DRWAV_CUE_BYTES) / DRWAV_CUE_POINT_BYTES;
+ drwav__metadata_request_extra_memory_for_stage_2(pParser, sizeof(drwav_cue_point) * cueCount, DRWAV_METADATA_ALIGNMENT);
+ } else {+ bytesRead = drwav__read_cue_to_metadata_obj(pParser, pChunkHeader, &pParser->pMetadata[pParser->metadataCursor]);
+ if (bytesRead == pChunkHeader->sizeInBytes) {+ pParser->metadataCursor += 1;
+ } else {+ /* Failed to parse. */
+ }
+ }
+ } else {+ /* Incorrectly formed chunk. */
+ }
+ } else if (drwav__chunk_matches(allowedMetadataTypes, pChunkID, drwav_metadata_type_bext, "bext")) {+ if (pChunkHeader->sizeInBytes >= DRWAV_BEXT_BYTES) {+ if (pParser->stage == drwav__metadata_parser_stage_count) {+ /* The description field is the largest one in a bext chunk, so that is the max size of this temporary buffer. */
+ char buffer[DRWAV_BEXT_DESCRIPTION_BYTES + 1];
+ size_t allocSizeNeeded = DRWAV_BEXT_UMID_BYTES; /* We know we will need SMPTE umid size. */
+ size_t bytesJustRead;
+
+ buffer[DRWAV_BEXT_DESCRIPTION_BYTES] = '\0';
+ bytesJustRead = drwav__metadata_parser_read(pParser, buffer, DRWAV_BEXT_DESCRIPTION_BYTES, &bytesRead);
+ if (bytesJustRead != DRWAV_BEXT_DESCRIPTION_BYTES) {+ return bytesRead;
+ }
+ allocSizeNeeded += drwav__strlen(buffer) + 1;
+
+ buffer[DRWAV_BEXT_ORIGINATOR_NAME_BYTES] = '\0';
+ bytesJustRead = drwav__metadata_parser_read(pParser, buffer, DRWAV_BEXT_ORIGINATOR_NAME_BYTES, &bytesRead);
+ if (bytesJustRead != DRWAV_BEXT_ORIGINATOR_NAME_BYTES) {+ return bytesRead;
+ }
+ allocSizeNeeded += drwav__strlen(buffer) + 1;
+
+ buffer[DRWAV_BEXT_ORIGINATOR_REF_BYTES] = '\0';
+ bytesJustRead = drwav__metadata_parser_read(pParser, buffer, DRWAV_BEXT_ORIGINATOR_REF_BYTES, &bytesRead);
+ if (bytesJustRead != DRWAV_BEXT_ORIGINATOR_REF_BYTES) {+ return bytesRead;
+ }
+ allocSizeNeeded += drwav__strlen(buffer) + 1;
+ allocSizeNeeded += (size_t)pChunkHeader->sizeInBytes - DRWAV_BEXT_BYTES; /* Coding history. */
+
+ drwav__metadata_request_extra_memory_for_stage_2(pParser, allocSizeNeeded, 1);
+
+ pParser->metadataCount += 1;
+ } else {+ bytesRead = drwav__read_bext_to_metadata_obj(pParser, &pParser->pMetadata[pParser->metadataCursor], pChunkHeader->sizeInBytes);
+ if (bytesRead == pChunkHeader->sizeInBytes) {+ pParser->metadataCursor += 1;
+ } else {+ /* Failed to parse. */
+ }
+ }
+ } else {+ /* Incorrectly formed chunk. */
+ }
+ } else if (drwav_fourcc_equal(pChunkID, "LIST") || drwav_fourcc_equal(pChunkID, "list")) {+ drwav_metadata_location listType = drwav_metadata_location_invalid;
+ while (bytesRead < pChunkHeader->sizeInBytes) {+ drwav_uint8 subchunkId[4];
+ drwav_uint8 subchunkSizeBuffer[4];
+ drwav_uint64 subchunkDataSize;
+ drwav_uint64 subchunkBytesRead = 0;
+ drwav_uint64 bytesJustRead = drwav__metadata_parser_read(pParser, subchunkId, sizeof(subchunkId), &bytesRead);
+ if (bytesJustRead != sizeof(subchunkId)) {+ break;
+ }
+
+ /*
+ The first thing in a list chunk should be "adtl" or "INFO".
+
+ - adtl means this list is a Associated Data List Chunk and will contain labels, notes
+ or labelled cue regions.
+ - INFO means this list is an Info List Chunk containing info text chunks such as IPRD
+ which would specifies the album of this wav file.
+
+ No data follows the adtl or INFO id so we just make note of what type this list is and
+ continue.
+ */
+ if (drwav_fourcc_equal(subchunkId, "adtl")) {+ listType = drwav_metadata_location_inside_adtl_list;
+ continue;
+ } else if (drwav_fourcc_equal(subchunkId, "INFO")) {+ listType = drwav_metadata_location_inside_info_list;
+ continue;
+ }
+
+ bytesJustRead = drwav__metadata_parser_read(pParser, subchunkSizeBuffer, sizeof(subchunkSizeBuffer), &bytesRead);
+ if (bytesJustRead != sizeof(subchunkSizeBuffer)) {+ break;
+ }
+ subchunkDataSize = drwav_bytes_to_u32(subchunkSizeBuffer);
+
+ if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_label, "labl") || drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_note, "note")) {+ if (subchunkDataSize >= DRWAV_LIST_LABEL_OR_NOTE_BYTES) {+ drwav_uint64 stringSizeWithNullTerm = subchunkDataSize - DRWAV_LIST_LABEL_OR_NOTE_BYTES;
+ if (pParser->stage == drwav__metadata_parser_stage_count) {+ pParser->metadataCount += 1;
+ drwav__metadata_request_extra_memory_for_stage_2(pParser, (size_t)stringSizeWithNullTerm, 1);
+ } else {+ subchunkBytesRead = drwav__read_list_label_or_note_to_metadata_obj(pParser, &pParser->pMetadata[pParser->metadataCursor], subchunkDataSize, drwav_fourcc_equal(subchunkId, "labl") ? drwav_metadata_type_list_label : drwav_metadata_type_list_note);
+ if (subchunkBytesRead == subchunkDataSize) {+ pParser->metadataCursor += 1;
+ } else {+ /* Failed to parse. */
+ }
+ }
+ } else {+ /* Incorrectly formed chunk. */
+ }
+ } else if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_labelled_cue_region, "ltxt")) {+ if (subchunkDataSize >= DRWAV_LIST_LABELLED_TEXT_BYTES) {+ drwav_uint64 stringSizeWithNullTerminator = subchunkDataSize - DRWAV_LIST_LABELLED_TEXT_BYTES;
+ if (pParser->stage == drwav__metadata_parser_stage_count) {+ pParser->metadataCount += 1;
+ drwav__metadata_request_extra_memory_for_stage_2(pParser, (size_t)stringSizeWithNullTerminator, 1);
+ } else {+ subchunkBytesRead = drwav__read_list_labelled_cue_region_to_metadata_obj(pParser, &pParser->pMetadata[pParser->metadataCursor], subchunkDataSize);
+ if (subchunkBytesRead == subchunkDataSize) {+ pParser->metadataCursor += 1;
+ } else {+ /* Failed to parse. */
+ }
+ }
+ } else {+ /* Incorrectly formed chunk. */
+ }
+ } else if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_info_software, "ISFT")) {+ subchunkBytesRead = drwav__metadata_process_info_text_chunk(pParser, subchunkDataSize, drwav_metadata_type_list_info_software);
+ } else if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_info_copyright, "ICOP")) {+ subchunkBytesRead = drwav__metadata_process_info_text_chunk(pParser, subchunkDataSize, drwav_metadata_type_list_info_copyright);
+ } else if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_info_title, "INAM")) {+ subchunkBytesRead = drwav__metadata_process_info_text_chunk(pParser, subchunkDataSize, drwav_metadata_type_list_info_title);
+ } else if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_info_artist, "IART")) {+ subchunkBytesRead = drwav__metadata_process_info_text_chunk(pParser, subchunkDataSize, drwav_metadata_type_list_info_artist);
+ } else if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_info_comment, "ICMT")) {+ subchunkBytesRead = drwav__metadata_process_info_text_chunk(pParser, subchunkDataSize, drwav_metadata_type_list_info_comment);
+ } else if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_info_date, "ICRD")) {+ subchunkBytesRead = drwav__metadata_process_info_text_chunk(pParser, subchunkDataSize, drwav_metadata_type_list_info_date);
+ } else if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_info_genre, "IGNR")) {+ subchunkBytesRead = drwav__metadata_process_info_text_chunk(pParser, subchunkDataSize, drwav_metadata_type_list_info_genre);
+ } else if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_info_album, "IPRD")) {+ subchunkBytesRead = drwav__metadata_process_info_text_chunk(pParser, subchunkDataSize, drwav_metadata_type_list_info_album);
+ } else if (drwav__chunk_matches(allowedMetadataTypes, subchunkId, drwav_metadata_type_list_info_tracknumber, "ITRK")) {+ subchunkBytesRead = drwav__metadata_process_info_text_chunk(pParser, subchunkDataSize, drwav_metadata_type_list_info_tracknumber);
+ } else if ((allowedMetadataTypes & drwav_metadata_type_unknown) != 0) {+ subchunkBytesRead = drwav__metadata_process_unknown_chunk(pParser, subchunkId, subchunkDataSize, listType);
+ }
+
+ bytesRead += subchunkBytesRead;
+ DRWAV_ASSERT(subchunkBytesRead <= subchunkDataSize);
+
+ if (subchunkBytesRead < subchunkDataSize) {+ drwav_uint64 bytesToSeek = subchunkDataSize - subchunkBytesRead;
+
+ if (!pParser->onSeek(pParser->pReadSeekUserData, (int)bytesToSeek, drwav_seek_origin_current)) {+ break;
+ }
+ bytesRead += bytesToSeek;
+ }
+
+ if ((subchunkDataSize % 2) == 1) {+ if (!pParser->onSeek(pParser->pReadSeekUserData, 1, drwav_seek_origin_current)) {+ break;
+ }
+ bytesRead += 1;
+ }
+ }
+ } else if ((allowedMetadataTypes & drwav_metadata_type_unknown) != 0) {+ bytesRead = drwav__metadata_process_unknown_chunk(pParser, pChunkID, pChunkHeader->sizeInBytes, drwav_metadata_location_top_level);
+ }
+
+ return bytesRead;
+}
+
+
+DRWAV_PRIVATE drwav_uint32 drwav_get_bytes_per_pcm_frame(drwav* pWav)
+{+ drwav_uint32 bytesPerFrame;
+
+ /*
+ The bytes per frame is a bit ambiguous. It can be either be based on the bits per sample, or the block align. The way I'm doing it here
+ is that if the bits per sample is a multiple of 8, use floor(bitsPerSample*channels/8), otherwise fall back to the block align.
+ */
+ if ((pWav->bitsPerSample & 0x7) == 0) {+ /* Bits per sample is a multiple of 8. */
+ bytesPerFrame = (pWav->bitsPerSample * pWav->fmt.channels) >> 3;
+ } else {+ bytesPerFrame = pWav->fmt.blockAlign;
+ }
+
+ /* Validation for known formats. a-law and mu-law should be 1 byte per channel. If it's not, it's not decodable. */
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ALAW || pWav->translatedFormatTag == DR_WAVE_FORMAT_MULAW) {+ if (bytesPerFrame != pWav->fmt.channels) {+ return 0; /* Invalid file. */
+ }
+ }
+
+ return bytesPerFrame;
+}
+
+DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
+{+ if (pFMT == NULL) {+ return 0;
+ }
+
+ if (pFMT->formatTag != DR_WAVE_FORMAT_EXTENSIBLE) {+ return pFMT->formatTag;
+ } else {+ return drwav_bytes_to_u16(pFMT->subFormat); /* Only the first two bytes are required. */
+ }
+}
+
+DRWAV_PRIVATE drwav_bool32 drwav_preinit(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, void* pReadSeekUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pWav == NULL || onRead == NULL || onSeek == NULL) {+ return DRWAV_FALSE;
+ }
+
+ DRWAV_ZERO_MEMORY(pWav, sizeof(*pWav));
+ pWav->onRead = onRead;
+ pWav->onSeek = onSeek;
+ pWav->pUserData = pReadSeekUserData;
+ pWav->allocationCallbacks = drwav_copy_allocation_callbacks_or_defaults(pAllocationCallbacks);
+
+ if (pWav->allocationCallbacks.onFree == NULL || (pWav->allocationCallbacks.onMalloc == NULL && pWav->allocationCallbacks.onRealloc == NULL)) {+ return DRWAV_FALSE; /* Invalid allocation callbacks. */
+ }
+
+ return DRWAV_TRUE;
+}
+
+DRWAV_PRIVATE drwav_bool32 drwav_init__internal(drwav* pWav, drwav_chunk_proc onChunk, void* pChunkUserData, drwav_uint32 flags)
+{+ /* This function assumes drwav_preinit() has been called beforehand. */
+
+ drwav_uint64 cursor; /* <-- Keeps track of the byte position so we can seek to specific locations. */
+ drwav_bool32 sequential;
+ drwav_uint8 riff[4];
+ drwav_fmt fmt;
+ unsigned short translatedFormatTag;
+ drwav_bool32 foundDataChunk;
+ drwav_uint64 dataChunkSize = 0; /* <-- Important! Don't explicitly set this to 0 anywhere else. Calculation of the size of the data chunk is performed in different paths depending on the container. */
+ drwav_uint64 sampleCountFromFactChunk = 0; /* Same as dataChunkSize - make sure this is the only place this is initialized to 0. */
+ drwav_uint64 chunkSize;
+ drwav__metadata_parser metadataParser;
+
+ cursor = 0;
+ sequential = (flags & DRWAV_SEQUENTIAL) != 0;
+
+ /* The first 4 bytes should be the RIFF identifier. */
+ if (drwav__on_read(pWav->onRead, pWav->pUserData, riff, sizeof(riff), &cursor) != sizeof(riff)) {+ return DRWAV_FALSE;
+ }
+
+ /*
+ The first 4 bytes can be used to identify the container. For RIFF files it will start with "RIFF" and for
+ w64 it will start with "riff".
+ */
+ if (drwav_fourcc_equal(riff, "RIFF")) {+ pWav->container = drwav_container_riff;
+ } else if (drwav_fourcc_equal(riff, "riff")) {+ int i;
+ drwav_uint8 riff2[12];
+
+ pWav->container = drwav_container_w64;
+
+ /* Check the rest of the GUID for validity. */
+ if (drwav__on_read(pWav->onRead, pWav->pUserData, riff2, sizeof(riff2), &cursor) != sizeof(riff2)) {+ return DRWAV_FALSE;
+ }
+
+ for (i = 0; i < 12; ++i) {+ if (riff2[i] != drwavGUID_W64_RIFF[i+4]) {+ return DRWAV_FALSE;
+ }
+ }
+ } else if (drwav_fourcc_equal(riff, "RF64")) {+ pWav->container = drwav_container_rf64;
+ } else {+ return DRWAV_FALSE; /* Unknown or unsupported container. */
+ }
+
+
+ if (pWav->container == drwav_container_riff || pWav->container == drwav_container_rf64) {+ drwav_uint8 chunkSizeBytes[4];
+ drwav_uint8 wave[4];
+
+ /* RIFF/WAVE */
+ if (drwav__on_read(pWav->onRead, pWav->pUserData, chunkSizeBytes, sizeof(chunkSizeBytes), &cursor) != sizeof(chunkSizeBytes)) {+ return DRWAV_FALSE;
+ }
+
+ if (pWav->container == drwav_container_riff) {+ if (drwav_bytes_to_u32(chunkSizeBytes) < 36) {+ return DRWAV_FALSE; /* Chunk size should always be at least 36 bytes. */
+ }
+ } else {+ if (drwav_bytes_to_u32(chunkSizeBytes) != 0xFFFFFFFF) {+ return DRWAV_FALSE; /* Chunk size should always be set to -1/0xFFFFFFFF for RF64. The actual size is retrieved later. */
+ }
+ }
+
+ if (drwav__on_read(pWav->onRead, pWav->pUserData, wave, sizeof(wave), &cursor) != sizeof(wave)) {+ return DRWAV_FALSE;
+ }
+
+ if (!drwav_fourcc_equal(wave, "WAVE")) {+ return DRWAV_FALSE; /* Expecting "WAVE". */
+ }
+ } else {+ drwav_uint8 chunkSizeBytes[8];
+ drwav_uint8 wave[16];
+
+ /* W64 */
+ if (drwav__on_read(pWav->onRead, pWav->pUserData, chunkSizeBytes, sizeof(chunkSizeBytes), &cursor) != sizeof(chunkSizeBytes)) {+ return DRWAV_FALSE;
+ }
+
+ if (drwav_bytes_to_u64(chunkSizeBytes) < 80) {+ return DRWAV_FALSE;
+ }
+
+ if (drwav__on_read(pWav->onRead, pWav->pUserData, wave, sizeof(wave), &cursor) != sizeof(wave)) {+ return DRWAV_FALSE;
+ }
+
+ if (!drwav_guid_equal(wave, drwavGUID_W64_WAVE)) {+ return DRWAV_FALSE;
+ }
+ }
+
+
+ /* For RF64, the "ds64" chunk must come next, before the "fmt " chunk. */
+ if (pWav->container == drwav_container_rf64) {+ drwav_uint8 sizeBytes[8];
+ drwav_uint64 bytesRemainingInChunk;
+ drwav_chunk_header header;
+ drwav_result result = drwav__read_chunk_header(pWav->onRead, pWav->pUserData, pWav->container, &cursor, &header);
+ if (result != DRWAV_SUCCESS) {+ return DRWAV_FALSE;
+ }
+
+ if (!drwav_fourcc_equal(header.id.fourcc, "ds64")) {+ return DRWAV_FALSE; /* Expecting "ds64". */
+ }
+
+ bytesRemainingInChunk = header.sizeInBytes + header.paddingSize;
+
+ /* We don't care about the size of the RIFF chunk - skip it. */
+ if (!drwav__seek_forward(pWav->onSeek, 8, pWav->pUserData)) {+ return DRWAV_FALSE;
+ }
+ bytesRemainingInChunk -= 8;
+ cursor += 8;
+
+
+ /* Next 8 bytes is the size of the "data" chunk. */
+ if (drwav__on_read(pWav->onRead, pWav->pUserData, sizeBytes, sizeof(sizeBytes), &cursor) != sizeof(sizeBytes)) {+ return DRWAV_FALSE;
+ }
+ bytesRemainingInChunk -= 8;
+ dataChunkSize = drwav_bytes_to_u64(sizeBytes);
+
+
+ /* Next 8 bytes is the same count which we would usually derived from the FACT chunk if it was available. */
+ if (drwav__on_read(pWav->onRead, pWav->pUserData, sizeBytes, sizeof(sizeBytes), &cursor) != sizeof(sizeBytes)) {+ return DRWAV_FALSE;
+ }
+ bytesRemainingInChunk -= 8;
+ sampleCountFromFactChunk = drwav_bytes_to_u64(sizeBytes);
+
+
+ /* Skip over everything else. */
+ if (!drwav__seek_forward(pWav->onSeek, bytesRemainingInChunk, pWav->pUserData)) {+ return DRWAV_FALSE;
+ }
+ cursor += bytesRemainingInChunk;
+ }
+
+
+ /* The next bytes should be the "fmt " chunk. */
+ if (!drwav__read_fmt(pWav->onRead, pWav->onSeek, pWav->pUserData, pWav->container, &cursor, &fmt)) {+ return DRWAV_FALSE; /* Failed to read the "fmt " chunk. */
+ }
+
+ /* Basic validation. */
+ if ((fmt.sampleRate == 0 || fmt.sampleRate > DRWAV_MAX_SAMPLE_RATE) ||
+ (fmt.channels == 0 || fmt.channels > DRWAV_MAX_CHANNELS) ||
+ (fmt.bitsPerSample == 0 || fmt.bitsPerSample > DRWAV_MAX_BITS_PER_SAMPLE) ||
+ fmt.blockAlign == 0) {+ return DRWAV_FALSE; /* Probably an invalid WAV file. */
+ }
+
+
+ /* Translate the internal format. */
+ translatedFormatTag = fmt.formatTag;
+ if (translatedFormatTag == DR_WAVE_FORMAT_EXTENSIBLE) {+ translatedFormatTag = drwav_bytes_to_u16(fmt.subFormat + 0);
+ }
+
+ DRWAV_ZERO_MEMORY(&metadataParser, sizeof(metadataParser));
+
+ /* Not tested on W64. */
+ if (!sequential && pWav->allowedMetadataTypes != drwav_metadata_type_none && (pWav->container == drwav_container_riff || pWav->container == drwav_container_rf64)) {+ drwav_uint64 cursorForMetadata = cursor;
+
+ metadataParser.onRead = pWav->onRead;
+ metadataParser.onSeek = pWav->onSeek;
+ metadataParser.pReadSeekUserData = pWav->pUserData;
+ metadataParser.stage = drwav__metadata_parser_stage_count;
+
+ for (;;) {+ drwav_result result;
+ drwav_uint64 bytesRead;
+ drwav_uint64 remainingBytes;
+ drwav_chunk_header header;
+
+ result = drwav__read_chunk_header(pWav->onRead, pWav->pUserData, pWav->container, &cursorForMetadata, &header);
+ if (result != DRWAV_SUCCESS) {+ break;
+ }
+
+ bytesRead = drwav__metadata_process_chunk(&metadataParser, &header, pWav->allowedMetadataTypes);
+ DRWAV_ASSERT(bytesRead <= header.sizeInBytes);
+
+ remainingBytes = header.sizeInBytes - bytesRead + header.paddingSize;
+ if (!drwav__seek_forward(pWav->onSeek, remainingBytes, pWav->pUserData)) {+ break;
+ }
+ cursorForMetadata += remainingBytes;
+ }
+
+ if (!drwav__seek_from_start(pWav->onSeek, cursor, pWav->pUserData)) {+ return DRWAV_FALSE;
+ }
+
+ drwav__metadata_alloc(&metadataParser, &pWav->allocationCallbacks);
+ metadataParser.stage = drwav__metadata_parser_stage_read;
+ }
+
+ /*
+ We need to enumerate over each chunk for two reasons:
+ 1) The "data" chunk may not be the next one
+ 2) We may want to report each chunk back to the client
+
+ In order to correctly report each chunk back to the client we will need to keep looping until the end of the file.
+ */
+ foundDataChunk = DRWAV_FALSE;
+
+ /* The next chunk we care about is the "data" chunk. This is not necessarily the next chunk so we'll need to loop. */
+ for (;;) {+ drwav_chunk_header header;
+ drwav_result result = drwav__read_chunk_header(pWav->onRead, pWav->pUserData, pWav->container, &cursor, &header);
+ if (result != DRWAV_SUCCESS) {+ if (!foundDataChunk) {+ return DRWAV_FALSE;
+ } else {+ break; /* Probably at the end of the file. Get out of the loop. */
+ }
+ }
+
+ /* Tell the client about this chunk. */
+ if (!sequential && onChunk != NULL) {+ drwav_uint64 callbackBytesRead = onChunk(pChunkUserData, pWav->onRead, pWav->onSeek, pWav->pUserData, &header, pWav->container, &fmt);
+
+ /*
+ dr_wav may need to read the contents of the chunk, so we now need to seek back to the position before
+ we called the callback.
+ */
+ if (callbackBytesRead > 0) {+ if (!drwav__seek_from_start(pWav->onSeek, cursor, pWav->pUserData)) {+ return DRWAV_FALSE;
+ }
+ }
+ }
+
+ if (!sequential && pWav->allowedMetadataTypes != drwav_metadata_type_none && (pWav->container == drwav_container_riff || pWav->container == drwav_container_rf64)) {+ drwav_uint64 bytesRead = drwav__metadata_process_chunk(&metadataParser, &header, pWav->allowedMetadataTypes);
+
+ if (bytesRead > 0) {+ if (!drwav__seek_from_start(pWav->onSeek, cursor, pWav->pUserData)) {+ return DRWAV_FALSE;
+ }
+ }
+ }
+
+
+ if (!foundDataChunk) {+ pWav->dataChunkDataPos = cursor;
+ }
+
+ chunkSize = header.sizeInBytes;
+ if (pWav->container == drwav_container_riff || pWav->container == drwav_container_rf64) {+ if (drwav_fourcc_equal(header.id.fourcc, "data")) {+ foundDataChunk = DRWAV_TRUE;
+ if (pWav->container != drwav_container_rf64) { /* The data chunk size for RF64 will always be set to 0xFFFFFFFF here. It was set to it's true value earlier. */+ dataChunkSize = chunkSize;
+ }
+ }
+ } else {+ if (drwav_guid_equal(header.id.guid, drwavGUID_W64_DATA)) {+ foundDataChunk = DRWAV_TRUE;
+ dataChunkSize = chunkSize;
+ }
+ }
+
+ /*
+ If at this point we have found the data chunk and we're running in sequential mode, we need to break out of this loop. The reason for
+ this is that we would otherwise require a backwards seek which sequential mode forbids.
+ */
+ if (foundDataChunk && sequential) {+ break;
+ }
+
+ /* Optional. Get the total sample count from the FACT chunk. This is useful for compressed formats. */
+ if (pWav->container == drwav_container_riff) {+ if (drwav_fourcc_equal(header.id.fourcc, "fact")) {+ drwav_uint32 sampleCount;
+ if (drwav__on_read(pWav->onRead, pWav->pUserData, &sampleCount, 4, &cursor) != 4) {+ return DRWAV_FALSE;
+ }
+ chunkSize -= 4;
+
+ if (!foundDataChunk) {+ pWav->dataChunkDataPos = cursor;
+ }
+
+ /*
+ The sample count in the "fact" chunk is either unreliable, or I'm not understanding it properly. For now I am only enabling this
+ for Microsoft ADPCM formats.
+ */
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM) {+ sampleCountFromFactChunk = sampleCount;
+ } else {+ sampleCountFromFactChunk = 0;
+ }
+ }
+ } else if (pWav->container == drwav_container_w64) {+ if (drwav_guid_equal(header.id.guid, drwavGUID_W64_FACT)) {+ if (drwav__on_read(pWav->onRead, pWav->pUserData, &sampleCountFromFactChunk, 8, &cursor) != 8) {+ return DRWAV_FALSE;
+ }
+ chunkSize -= 8;
+
+ if (!foundDataChunk) {+ pWav->dataChunkDataPos = cursor;
+ }
+ }
+ } else if (pWav->container == drwav_container_rf64) {+ /* We retrieved the sample count from the ds64 chunk earlier so no need to do that here. */
+ }
+
+ /* Make sure we seek past the padding. */
+ chunkSize += header.paddingSize;
+ if (!drwav__seek_forward(pWav->onSeek, chunkSize, pWav->pUserData)) {+ break;
+ }
+ cursor += chunkSize;
+
+ if (!foundDataChunk) {+ pWav->dataChunkDataPos = cursor;
+ }
+ }
+
+ pWav->pMetadata = metadataParser.pMetadata;
+ pWav->metadataCount = metadataParser.metadataCount;
+
+ /* If we haven't found a data chunk, return an error. */
+ if (!foundDataChunk) {+ return DRWAV_FALSE;
+ }
+
+ /* We may have moved passed the data chunk. If so we need to move back. If running in sequential mode we can assume we are already sitting on the data chunk. */
+ if (!sequential) {+ if (!drwav__seek_from_start(pWav->onSeek, pWav->dataChunkDataPos, pWav->pUserData)) {+ return DRWAV_FALSE;
+ }
+ cursor = pWav->dataChunkDataPos;
+ }
+
+
+ /* At this point we should be sitting on the first byte of the raw audio data. */
+
+ pWav->fmt = fmt;
+ pWav->sampleRate = fmt.sampleRate;
+ pWav->channels = fmt.channels;
+ pWav->bitsPerSample = fmt.bitsPerSample;
+ pWav->bytesRemaining = dataChunkSize;
+ pWav->translatedFormatTag = translatedFormatTag;
+ pWav->dataChunkDataSize = dataChunkSize;
+
+ if (sampleCountFromFactChunk != 0) {+ pWav->totalPCMFrameCount = sampleCountFromFactChunk;
+ } else {+ drwav_uint32 bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return DRWAV_FALSE; /* Invalid file. */
+ }
+
+ pWav->totalPCMFrameCount = dataChunkSize / bytesPerFrame;
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM) {+ drwav_uint64 totalBlockHeaderSizeInBytes;
+ drwav_uint64 blockCount = dataChunkSize / fmt.blockAlign;
+
+ /* Make sure any trailing partial block is accounted for. */
+ if ((blockCount * fmt.blockAlign) < dataChunkSize) {+ blockCount += 1;
+ }
+
+ /* We decode two samples per byte. There will be blockCount headers in the data chunk. This is enough to know how to calculate the total PCM frame count. */
+ totalBlockHeaderSizeInBytes = blockCount * (6*fmt.channels);
+ pWav->totalPCMFrameCount = ((dataChunkSize - totalBlockHeaderSizeInBytes) * 2) / fmt.channels;
+ }
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_DVI_ADPCM) {+ drwav_uint64 totalBlockHeaderSizeInBytes;
+ drwav_uint64 blockCount = dataChunkSize / fmt.blockAlign;
+
+ /* Make sure any trailing partial block is accounted for. */
+ if ((blockCount * fmt.blockAlign) < dataChunkSize) {+ blockCount += 1;
+ }
+
+ /* We decode two samples per byte. There will be blockCount headers in the data chunk. This is enough to know how to calculate the total PCM frame count. */
+ totalBlockHeaderSizeInBytes = blockCount * (4*fmt.channels);
+ pWav->totalPCMFrameCount = ((dataChunkSize - totalBlockHeaderSizeInBytes) * 2) / fmt.channels;
+
+ /* The header includes a decoded sample for each channel which acts as the initial predictor sample. */
+ pWav->totalPCMFrameCount += blockCount;
+ }
+ }
+
+ /* Some formats only support a certain number of channels. */
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM || pWav->translatedFormatTag == DR_WAVE_FORMAT_DVI_ADPCM) {+ if (pWav->channels > 2) {+ return DRWAV_FALSE;
+ }
+ }
+
+ /* The number of bytes per frame must be known. If not, it's an invalid file and not decodable. */
+ if (drwav_get_bytes_per_pcm_frame(pWav) == 0) {+ return DRWAV_FALSE;
+ }
+
+#ifdef DR_WAV_LIBSNDFILE_COMPAT
+ /*
+ I use libsndfile as a benchmark for testing, however in the version I'm using (from the Windows installer on the libsndfile website),
+ it appears the total sample count libsndfile uses for MS-ADPCM is incorrect. It would seem they are computing the total sample count
+ from the number of blocks, however this results in the inclusion of extra silent samples at the end of the last block. The correct
+ way to know the total sample count is to inspect the "fact" chunk, which should always be present for compressed formats, and should
+ always include the sample count. This little block of code below is only used to emulate the libsndfile logic so I can properly run my
+ correctness tests against libsndfile, and is disabled by default.
+ */
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM) {+ drwav_uint64 blockCount = dataChunkSize / fmt.blockAlign;
+ pWav->totalPCMFrameCount = (((blockCount * (fmt.blockAlign - (6*pWav->channels))) * 2)) / fmt.channels; /* x2 because two samples per byte. */
+ }
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_DVI_ADPCM) {+ drwav_uint64 blockCount = dataChunkSize / fmt.blockAlign;
+ pWav->totalPCMFrameCount = (((blockCount * (fmt.blockAlign - (4*pWav->channels))) * 2) + (blockCount * pWav->channels)) / fmt.channels;
+ }
+#endif
+
+ return DRWAV_TRUE;
+}
+
+DRWAV_API drwav_bool32 drwav_init(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ return drwav_init_ex(pWav, onRead, onSeek, NULL, pUserData, NULL, 0, pAllocationCallbacks);
+}
+
+DRWAV_API drwav_bool32 drwav_init_ex(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_chunk_proc onChunk, void* pReadSeekUserData, void* pChunkUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (!drwav_preinit(pWav, onRead, onSeek, pReadSeekUserData, pAllocationCallbacks)) {+ return DRWAV_FALSE;
+ }
+
+ return drwav_init__internal(pWav, onChunk, pChunkUserData, flags);
+}
+
+DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (!drwav_preinit(pWav, onRead, onSeek, pUserData, pAllocationCallbacks)) {+ return DRWAV_FALSE;
+ }
+
+ pWav->allowedMetadataTypes = drwav_metadata_type_all_including_unknown; /* <-- Needs to be set to tell drwav_init_ex() that we need to process metadata. */
+ return drwav_init__internal(pWav, NULL, NULL, flags);
+}
+
+DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
+{+ drwav_metadata *result = pWav->pMetadata;
+
+ pWav->pMetadata = NULL;
+ pWav->metadataCount = 0;
+
+ return result;
+}
+
+
+DRWAV_PRIVATE size_t drwav__write(drwav* pWav, const void* pData, size_t dataSize)
+{+ DRWAV_ASSERT(pWav != NULL);
+ DRWAV_ASSERT(pWav->onWrite != NULL);
+
+ /* Generic write. Assumes no byte reordering required. */
+ return pWav->onWrite(pWav->pUserData, pData, dataSize);
+}
+
+DRWAV_PRIVATE size_t drwav__write_byte(drwav* pWav, drwav_uint8 byte)
+{+ DRWAV_ASSERT(pWav != NULL);
+ DRWAV_ASSERT(pWav->onWrite != NULL);
+
+ return pWav->onWrite(pWav->pUserData, &byte, 1);
+}
+
+DRWAV_PRIVATE size_t drwav__write_u16ne_to_le(drwav* pWav, drwav_uint16 value)
+{+ DRWAV_ASSERT(pWav != NULL);
+ DRWAV_ASSERT(pWav->onWrite != NULL);
+
+ if (!drwav__is_little_endian()) {+ value = drwav__bswap16(value);
+ }
+
+ return drwav__write(pWav, &value, 2);
+}
+
+DRWAV_PRIVATE size_t drwav__write_u32ne_to_le(drwav* pWav, drwav_uint32 value)
+{+ DRWAV_ASSERT(pWav != NULL);
+ DRWAV_ASSERT(pWav->onWrite != NULL);
+
+ if (!drwav__is_little_endian()) {+ value = drwav__bswap32(value);
+ }
+
+ return drwav__write(pWav, &value, 4);
+}
+
+DRWAV_PRIVATE size_t drwav__write_u64ne_to_le(drwav* pWav, drwav_uint64 value)
+{+ DRWAV_ASSERT(pWav != NULL);
+ DRWAV_ASSERT(pWav->onWrite != NULL);
+
+ if (!drwav__is_little_endian()) {+ value = drwav__bswap64(value);
+ }
+
+ return drwav__write(pWav, &value, 8);
+}
+
+DRWAV_PRIVATE size_t drwav__write_f32ne_to_le(drwav* pWav, float value)
+{+ union {+ drwav_uint32 u32;
+ float f32;
+ } u;
+
+ DRWAV_ASSERT(pWav != NULL);
+ DRWAV_ASSERT(pWav->onWrite != NULL);
+
+ u.f32 = value;
+
+ if (!drwav__is_little_endian()) {+ u.u32 = drwav__bswap32(u.u32);
+ }
+
+ return drwav__write(pWav, &u.u32, 4);
+}
+
+DRWAV_PRIVATE size_t drwav__write_or_count(drwav* pWav, const void* pData, size_t dataSize)
+{+ if (pWav == NULL) {+ return dataSize;
+ }
+
+ return drwav__write(pWav, pData, dataSize);
+}
+
+DRWAV_PRIVATE size_t drwav__write_or_count_byte(drwav* pWav, drwav_uint8 byte)
+{+ if (pWav == NULL) {+ return 1;
+ }
+
+ return drwav__write_byte(pWav, byte);
+}
+
+DRWAV_PRIVATE size_t drwav__write_or_count_u16ne_to_le(drwav* pWav, drwav_uint16 value)
+{+ if (pWav == NULL) {+ return 2;
+ }
+
+ return drwav__write_u16ne_to_le(pWav, value);
+}
+
+DRWAV_PRIVATE size_t drwav__write_or_count_u32ne_to_le(drwav* pWav, drwav_uint32 value)
+{+ if (pWav == NULL) {+ return 4;
+ }
+
+ return drwav__write_u32ne_to_le(pWav, value);
+}
+
+#if 0 /* Unused for now. */
+DRWAV_PRIVATE size_t drwav__write_or_count_u64ne_to_le(drwav* pWav, drwav_uint64 value)
+{+ if (pWav == NULL) {+ return 8;
+ }
+
+ return drwav__write_u64ne_to_le(pWav, value);
+}
+#endif
+
+DRWAV_PRIVATE size_t drwav__write_or_count_f32ne_to_le(drwav* pWav, float value)
+{+ if (pWav == NULL) {+ return 4;
+ }
+
+ return drwav__write_f32ne_to_le(pWav, value);
+}
+
+DRWAV_PRIVATE size_t drwav__write_or_count_string_to_fixed_size_buf(drwav* pWav, char* str, size_t bufFixedSize)
+{+ size_t len;
+
+ if (pWav == NULL) {+ return bufFixedSize;
+ }
+
+ len = drwav__strlen_clamped(str, bufFixedSize);
+ drwav__write_or_count(pWav, str, len);
+
+ if (len < bufFixedSize) {+ size_t i;
+ for (i = 0; i < bufFixedSize - len; ++i) {+ drwav__write_byte(pWav, 0);
+ }
+ }
+
+ return bufFixedSize;
+}
+
+
+/* pWav can be NULL meaning just count the bytes that would be written. */
+DRWAV_PRIVATE size_t drwav__write_or_count_metadata(drwav* pWav, drwav_metadata* pMetadatas, drwav_uint32 metadataCount)
+{+ size_t bytesWritten = 0;
+ drwav_bool32 hasListAdtl = DRWAV_FALSE;
+ drwav_bool32 hasListInfo = DRWAV_FALSE;
+ drwav_uint32 iMetadata;
+
+ if (pMetadatas == NULL || metadataCount == 0) {+ return 0;
+ }
+
+ for (iMetadata = 0; iMetadata < metadataCount; ++iMetadata) {+ drwav_metadata* pMetadata = &pMetadatas[iMetadata];
+ drwav_uint32 chunkSize = 0;
+
+ if ((pMetadata->type & drwav_metadata_type_list_all_info_strings) || (pMetadata->type == drwav_metadata_type_unknown && pMetadata->data.unknown.chunkLocation == drwav_metadata_location_inside_info_list)) {+ hasListInfo = DRWAV_TRUE;
+ }
+
+ if ((pMetadata->type & drwav_metadata_type_list_all_adtl) || (pMetadata->type == drwav_metadata_type_unknown && pMetadata->data.unknown.chunkLocation == drwav_metadata_location_inside_adtl_list)) {+ hasListAdtl = DRWAV_TRUE;
+ }
+
+ switch (pMetadata->type) {+ case drwav_metadata_type_smpl:
+ {+ drwav_uint32 iLoop;
+
+ chunkSize = DRWAV_SMPL_BYTES + DRWAV_SMPL_LOOP_BYTES * pMetadata->data.smpl.sampleLoopCount + pMetadata->data.smpl.samplerSpecificDataSizeInBytes;
+
+ bytesWritten += drwav__write_or_count(pWav, "smpl", 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, chunkSize);
+
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.manufacturerId);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.productId);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.samplePeriodNanoseconds);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.midiUnityNote);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.midiPitchFraction);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.smpteFormat);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.smpteOffset);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.sampleLoopCount);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.samplerSpecificDataSizeInBytes);
+
+ for (iLoop = 0; iLoop < pMetadata->data.smpl.sampleLoopCount; ++iLoop) {+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.pLoops[iLoop].cuePointId);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.pLoops[iLoop].type);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.pLoops[iLoop].firstSampleByteOffset);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.pLoops[iLoop].lastSampleByteOffset);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.pLoops[iLoop].sampleFraction);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.smpl.pLoops[iLoop].playCount);
+ }
+
+ if (pMetadata->data.smpl.samplerSpecificDataSizeInBytes > 0) {+ bytesWritten += drwav__write(pWav, pMetadata->data.smpl.pSamplerSpecificData, pMetadata->data.smpl.samplerSpecificDataSizeInBytes);
+ }
+ } break;
+
+ case drwav_metadata_type_inst:
+ {+ chunkSize = DRWAV_INST_BYTES;
+
+ bytesWritten += drwav__write_or_count(pWav, "inst", 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, chunkSize);
+ bytesWritten += drwav__write_or_count(pWav, &pMetadata->data.inst.midiUnityNote, 1);
+ bytesWritten += drwav__write_or_count(pWav, &pMetadata->data.inst.fineTuneCents, 1);
+ bytesWritten += drwav__write_or_count(pWav, &pMetadata->data.inst.gainDecibels, 1);
+ bytesWritten += drwav__write_or_count(pWav, &pMetadata->data.inst.lowNote, 1);
+ bytesWritten += drwav__write_or_count(pWav, &pMetadata->data.inst.highNote, 1);
+ bytesWritten += drwav__write_or_count(pWav, &pMetadata->data.inst.lowVelocity, 1);
+ bytesWritten += drwav__write_or_count(pWav, &pMetadata->data.inst.highVelocity, 1);
+ } break;
+
+ case drwav_metadata_type_cue:
+ {+ drwav_uint32 iCuePoint;
+
+ chunkSize = DRWAV_CUE_BYTES + DRWAV_CUE_POINT_BYTES * pMetadata->data.cue.cuePointCount;
+
+ bytesWritten += drwav__write_or_count(pWav, "cue ", 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, chunkSize);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.cue.cuePointCount);
+ for (iCuePoint = 0; iCuePoint < pMetadata->data.cue.cuePointCount; ++iCuePoint) {+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.cue.pCuePoints[iCuePoint].id);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.cue.pCuePoints[iCuePoint].playOrderPosition);
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.cue.pCuePoints[iCuePoint].dataChunkId, 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.cue.pCuePoints[iCuePoint].chunkStart);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.cue.pCuePoints[iCuePoint].blockStart);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.cue.pCuePoints[iCuePoint].sampleByteOffset);
+ }
+ } break;
+
+ case drwav_metadata_type_acid:
+ {+ chunkSize = DRWAV_ACID_BYTES;
+
+ bytesWritten += drwav__write_or_count(pWav, "acid", 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, chunkSize);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.acid.flags);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.acid.midiUnityNote);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.acid.reserved1);
+ bytesWritten += drwav__write_or_count_f32ne_to_le(pWav, pMetadata->data.acid.reserved2);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.acid.numBeats);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.acid.meterDenominator);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.acid.meterNumerator);
+ bytesWritten += drwav__write_or_count_f32ne_to_le(pWav, pMetadata->data.acid.tempo);
+ } break;
+
+ case drwav_metadata_type_bext:
+ {+ char reservedBuf[DRWAV_BEXT_RESERVED_BYTES];
+ drwav_uint32 timeReferenceLow;
+ drwav_uint32 timeReferenceHigh;
+
+ chunkSize = DRWAV_BEXT_BYTES + pMetadata->data.bext.codingHistorySize;
+
+ bytesWritten += drwav__write_or_count(pWav, "bext", 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, chunkSize);
+
+ bytesWritten += drwav__write_or_count_string_to_fixed_size_buf(pWav, pMetadata->data.bext.pDescription, DRWAV_BEXT_DESCRIPTION_BYTES);
+ bytesWritten += drwav__write_or_count_string_to_fixed_size_buf(pWav, pMetadata->data.bext.pOriginatorName, DRWAV_BEXT_ORIGINATOR_NAME_BYTES);
+ bytesWritten += drwav__write_or_count_string_to_fixed_size_buf(pWav, pMetadata->data.bext.pOriginatorReference, DRWAV_BEXT_ORIGINATOR_REF_BYTES);
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.bext.pOriginationDate, sizeof(pMetadata->data.bext.pOriginationDate));
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.bext.pOriginationTime, sizeof(pMetadata->data.bext.pOriginationTime));
+
+ timeReferenceLow = (drwav_uint32)(pMetadata->data.bext.timeReference & 0xFFFFFFFF);
+ timeReferenceHigh = (drwav_uint32)(pMetadata->data.bext.timeReference >> 32);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, timeReferenceLow);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, timeReferenceHigh);
+
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.bext.version);
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.bext.pUMID, DRWAV_BEXT_UMID_BYTES);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.bext.loudnessValue);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.bext.loudnessRange);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.bext.maxTruePeakLevel);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.bext.maxMomentaryLoudness);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.bext.maxShortTermLoudness);
+
+ DRWAV_ZERO_MEMORY(reservedBuf, sizeof(reservedBuf));
+ bytesWritten += drwav__write_or_count(pWav, reservedBuf, sizeof(reservedBuf));
+
+ if (pMetadata->data.bext.codingHistorySize > 0) {+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.bext.pCodingHistory, pMetadata->data.bext.codingHistorySize);
+ }
+ } break;
+
+ case drwav_metadata_type_unknown:
+ {+ if (pMetadata->data.unknown.chunkLocation == drwav_metadata_location_top_level) {+ chunkSize = pMetadata->data.unknown.dataSizeInBytes;
+
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.unknown.id, 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, chunkSize);
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.unknown.pData, pMetadata->data.unknown.dataSizeInBytes);
+ }
+ } break;
+
+ default: break;
+ }
+ if ((chunkSize % 2) != 0) {+ bytesWritten += drwav__write_or_count_byte(pWav, 0);
+ }
+ }
+
+ if (hasListInfo) {+ drwav_uint32 chunkSize = 4; /* Start with 4 bytes for "INFO". */
+ for (iMetadata = 0; iMetadata < metadataCount; ++iMetadata) {+ drwav_metadata* pMetadata = &pMetadatas[iMetadata];
+
+ if ((pMetadata->type & drwav_metadata_type_list_all_info_strings)) {+ chunkSize += 8; /* For id and string size. */
+ chunkSize += pMetadata->data.infoText.stringLength + 1; /* Include null terminator. */
+ } else if (pMetadata->type == drwav_metadata_type_unknown && pMetadata->data.unknown.chunkLocation == drwav_metadata_location_inside_info_list) {+ chunkSize += 8; /* For id string size. */
+ chunkSize += pMetadata->data.unknown.dataSizeInBytes;
+ }
+
+ if ((chunkSize % 2) != 0) {+ chunkSize += 1;
+ }
+ }
+
+ bytesWritten += drwav__write_or_count(pWav, "LIST", 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, chunkSize);
+ bytesWritten += drwav__write_or_count(pWav, "INFO", 4);
+
+ for (iMetadata = 0; iMetadata < metadataCount; ++iMetadata) {+ drwav_metadata* pMetadata = &pMetadatas[iMetadata];
+ drwav_uint32 subchunkSize = 0;
+
+ if (pMetadata->type & drwav_metadata_type_list_all_info_strings) {+ const char* pID = NULL;
+
+ switch (pMetadata->type) {+ case drwav_metadata_type_list_info_software: pID = "ISFT"; break;
+ case drwav_metadata_type_list_info_copyright: pID = "ICOP"; break;
+ case drwav_metadata_type_list_info_title: pID = "INAM"; break;
+ case drwav_metadata_type_list_info_artist: pID = "IART"; break;
+ case drwav_metadata_type_list_info_comment: pID = "ICMT"; break;
+ case drwav_metadata_type_list_info_date: pID = "ICRD"; break;
+ case drwav_metadata_type_list_info_genre: pID = "IGNR"; break;
+ case drwav_metadata_type_list_info_album: pID = "IPRD"; break;
+ case drwav_metadata_type_list_info_tracknumber: pID = "ITRK"; break;
+ default: break;
+ }
+
+ DRWAV_ASSERT(pID != NULL);
+
+ if (pMetadata->data.infoText.stringLength) {+ subchunkSize = pMetadata->data.infoText.stringLength + 1;
+ bytesWritten += drwav__write_or_count(pWav, pID, 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, subchunkSize);
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.infoText.pString, pMetadata->data.infoText.stringLength);
+ bytesWritten += drwav__write_or_count_byte(pWav, '\0');
+ }
+ } else if (pMetadata->type == drwav_metadata_type_unknown && pMetadata->data.unknown.chunkLocation == drwav_metadata_location_inside_info_list) {+ if (pMetadata->data.unknown.dataSizeInBytes) {+ subchunkSize = pMetadata->data.unknown.dataSizeInBytes;
+
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.unknown.id, 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.unknown.dataSizeInBytes);
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.unknown.pData, subchunkSize);
+ }
+ }
+
+ if ((subchunkSize % 2) != 0) {+ bytesWritten += drwav__write_or_count_byte(pWav, 0);
+ }
+ }
+ }
+
+ if (hasListAdtl) {+ drwav_uint32 chunkSize = 4; /* start with 4 bytes for "adtl" */
+
+ for (iMetadata = 0; iMetadata < metadataCount; ++iMetadata) {+ drwav_metadata* pMetadata = &pMetadatas[iMetadata];
+
+ switch (pMetadata->type)
+ {+ case drwav_metadata_type_list_label:
+ case drwav_metadata_type_list_note:
+ {+ chunkSize += 8; /* for id and chunk size */
+ chunkSize += DRWAV_LIST_LABEL_OR_NOTE_BYTES;
+
+ if (pMetadata->data.labelOrNote.stringLength > 0) {+ chunkSize += pMetadata->data.labelOrNote.stringLength + 1;
+ }
+ } break;
+
+ case drwav_metadata_type_list_labelled_cue_region:
+ {+ chunkSize += 8; /* for id and chunk size */
+ chunkSize += DRWAV_LIST_LABELLED_TEXT_BYTES;
+
+ if (pMetadata->data.labelledCueRegion.stringLength > 0) {+ chunkSize += pMetadata->data.labelledCueRegion.stringLength + 1;
+ }
+ } break;
+
+ case drwav_metadata_type_unknown:
+ {+ if (pMetadata->data.unknown.chunkLocation == drwav_metadata_location_inside_adtl_list) {+ chunkSize += 8; /* for id and chunk size */
+ chunkSize += pMetadata->data.unknown.dataSizeInBytes;
+ }
+ } break;
+
+ default: break;
+ }
+
+ if ((chunkSize % 2) != 0) {+ chunkSize += 1;
+ }
+ }
+
+ bytesWritten += drwav__write_or_count(pWav, "LIST", 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, chunkSize);
+ bytesWritten += drwav__write_or_count(pWav, "adtl", 4);
+
+ for (iMetadata = 0; iMetadata < metadataCount; ++iMetadata) {+ drwav_metadata* pMetadata = &pMetadatas[iMetadata];
+ drwav_uint32 subchunkSize = 0;
+
+ switch (pMetadata->type)
+ {+ case drwav_metadata_type_list_label:
+ case drwav_metadata_type_list_note:
+ {+ if (pMetadata->data.labelOrNote.stringLength > 0) {+ const char *pID = NULL;
+
+ if (pMetadata->type == drwav_metadata_type_list_label) {+ pID = "labl";
+ }
+ else if (pMetadata->type == drwav_metadata_type_list_note) {+ pID = "note";
+ }
+
+ DRWAV_ASSERT(pID != NULL);
+ DRWAV_ASSERT(pMetadata->data.labelOrNote.pString != NULL);
+
+ subchunkSize = DRWAV_LIST_LABEL_OR_NOTE_BYTES;
+
+ bytesWritten += drwav__write_or_count(pWav, pID, 4);
+ subchunkSize += pMetadata->data.labelOrNote.stringLength + 1;
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, subchunkSize);
+
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.labelOrNote.cuePointId);
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.labelOrNote.pString, pMetadata->data.labelOrNote.stringLength);
+ bytesWritten += drwav__write_or_count_byte(pWav, '\0');
+ }
+ } break;
+
+ case drwav_metadata_type_list_labelled_cue_region:
+ {+ subchunkSize = DRWAV_LIST_LABELLED_TEXT_BYTES;
+
+ bytesWritten += drwav__write_or_count(pWav, "ltxt", 4);
+ if (pMetadata->data.labelledCueRegion.stringLength > 0) {+ subchunkSize += pMetadata->data.labelledCueRegion.stringLength + 1;
+ }
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, subchunkSize);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.labelledCueRegion.cuePointId);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, pMetadata->data.labelledCueRegion.sampleLength);
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.labelledCueRegion.purposeId, 4);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.labelledCueRegion.country);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.labelledCueRegion.language);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.labelledCueRegion.dialect);
+ bytesWritten += drwav__write_or_count_u16ne_to_le(pWav, pMetadata->data.labelledCueRegion.codePage);
+
+ if (pMetadata->data.labelledCueRegion.stringLength > 0) {+ DRWAV_ASSERT(pMetadata->data.labelledCueRegion.pString != NULL);
+
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.labelledCueRegion.pString, pMetadata->data.labelledCueRegion.stringLength);
+ bytesWritten += drwav__write_or_count_byte(pWav, '\0');
+ }
+ } break;
+
+ case drwav_metadata_type_unknown:
+ {+ if (pMetadata->data.unknown.chunkLocation == drwav_metadata_location_inside_adtl_list) {+ subchunkSize = pMetadata->data.unknown.dataSizeInBytes;
+
+ DRWAV_ASSERT(pMetadata->data.unknown.pData != NULL);
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.unknown.id, 4);
+ bytesWritten += drwav__write_or_count_u32ne_to_le(pWav, subchunkSize);
+ bytesWritten += drwav__write_or_count(pWav, pMetadata->data.unknown.pData, subchunkSize);
+ }
+ } break;
+
+ default: break;
+ }
+
+ if ((subchunkSize % 2) != 0) {+ bytesWritten += drwav__write_or_count_byte(pWav, 0);
+ }
+ }
+ }
+
+ DRWAV_ASSERT((bytesWritten % 2) == 0);
+
+ return bytesWritten;
+}
+
+DRWAV_PRIVATE drwav_uint32 drwav__riff_chunk_size_riff(drwav_uint64 dataChunkSize, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
+{+ drwav_uint64 chunkSize = 4 + 24 + (drwav_uint64)drwav__write_or_count_metadata(NULL, pMetadata, metadataCount) + 8 + dataChunkSize + drwav__chunk_padding_size_riff(dataChunkSize); /* 4 = "WAVE". 24 = "fmt " chunk. 8 = "data" + u32 data size. */
+ if (chunkSize > 0xFFFFFFFFUL) {+ chunkSize = 0xFFFFFFFFUL;
+ }
+
+ return (drwav_uint32)chunkSize; /* Safe cast due to the clamp above. */
+}
+
+DRWAV_PRIVATE drwav_uint32 drwav__data_chunk_size_riff(drwav_uint64 dataChunkSize)
+{+ if (dataChunkSize <= 0xFFFFFFFFUL) {+ return (drwav_uint32)dataChunkSize;
+ } else {+ return 0xFFFFFFFFUL;
+ }
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__riff_chunk_size_w64(drwav_uint64 dataChunkSize)
+{+ drwav_uint64 dataSubchunkPaddingSize = drwav__chunk_padding_size_w64(dataChunkSize);
+
+ return 80 + 24 + dataChunkSize + dataSubchunkPaddingSize; /* +24 because W64 includes the size of the GUID and size fields. */
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__data_chunk_size_w64(drwav_uint64 dataChunkSize)
+{+ return 24 + dataChunkSize; /* +24 because W64 includes the size of the GUID and size fields. */
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__riff_chunk_size_rf64(drwav_uint64 dataChunkSize, drwav_metadata *metadata, drwav_uint32 numMetadata)
+{+ drwav_uint64 chunkSize = 4 + 36 + 24 + (drwav_uint64)drwav__write_or_count_metadata(NULL, metadata, numMetadata) + 8 + dataChunkSize + drwav__chunk_padding_size_riff(dataChunkSize); /* 4 = "WAVE". 36 = "ds64" chunk. 24 = "fmt " chunk. 8 = "data" + u32 data size. */
+ if (chunkSize > 0xFFFFFFFFUL) {+ chunkSize = 0xFFFFFFFFUL;
+ }
+
+ return chunkSize;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav__data_chunk_size_rf64(drwav_uint64 dataChunkSize)
+{+ return dataChunkSize;
+}
+
+
+
+DRWAV_PRIVATE drwav_bool32 drwav_preinit_write(drwav* pWav, const drwav_data_format* pFormat, drwav_bool32 isSequential, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pWav == NULL || onWrite == NULL) {+ return DRWAV_FALSE;
+ }
+
+ if (!isSequential && onSeek == NULL) {+ return DRWAV_FALSE; /* <-- onSeek is required when in non-sequential mode. */
+ }
+
+ /* Not currently supporting compressed formats. Will need to add support for the "fact" chunk before we enable this. */
+ if (pFormat->format == DR_WAVE_FORMAT_EXTENSIBLE) {+ return DRWAV_FALSE;
+ }
+ if (pFormat->format == DR_WAVE_FORMAT_ADPCM || pFormat->format == DR_WAVE_FORMAT_DVI_ADPCM) {+ return DRWAV_FALSE;
+ }
+
+ DRWAV_ZERO_MEMORY(pWav, sizeof(*pWav));
+ pWav->onWrite = onWrite;
+ pWav->onSeek = onSeek;
+ pWav->pUserData = pUserData;
+ pWav->allocationCallbacks = drwav_copy_allocation_callbacks_or_defaults(pAllocationCallbacks);
+
+ if (pWav->allocationCallbacks.onFree == NULL || (pWav->allocationCallbacks.onMalloc == NULL && pWav->allocationCallbacks.onRealloc == NULL)) {+ return DRWAV_FALSE; /* Invalid allocation callbacks. */
+ }
+
+ pWav->fmt.formatTag = (drwav_uint16)pFormat->format;
+ pWav->fmt.channels = (drwav_uint16)pFormat->channels;
+ pWav->fmt.sampleRate = pFormat->sampleRate;
+ pWav->fmt.avgBytesPerSec = (drwav_uint32)((pFormat->bitsPerSample * pFormat->sampleRate * pFormat->channels) / 8);
+ pWav->fmt.blockAlign = (drwav_uint16)((pFormat->channels * pFormat->bitsPerSample) / 8);
+ pWav->fmt.bitsPerSample = (drwav_uint16)pFormat->bitsPerSample;
+ pWav->fmt.extendedSize = 0;
+ pWav->isSequentialWrite = isSequential;
+
+ return DRWAV_TRUE;
+}
+
+
+DRWAV_PRIVATE drwav_bool32 drwav_init_write__internal(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount)
+{+ /* The function assumes drwav_preinit_write() was called beforehand. */
+
+ size_t runningPos = 0;
+ drwav_uint64 initialDataChunkSize = 0;
+ drwav_uint64 chunkSizeFMT;
+
+ /*
+ The initial values for the "RIFF" and "data" chunks depends on whether or not we are initializing in sequential mode or not. In
+ sequential mode we set this to its final values straight away since they can be calculated from the total sample count. In non-
+ sequential mode we initialize it all to zero and fill it out in drwav_uninit() using a backwards seek.
+ */
+ if (pWav->isSequentialWrite) {+ initialDataChunkSize = (totalSampleCount * pWav->fmt.bitsPerSample) / 8;
+
+ /*
+ The RIFF container has a limit on the number of samples. drwav is not allowing this. There's no practical limits for Wave64
+ so for the sake of simplicity I'm not doing any validation for that.
+ */
+ if (pFormat->container == drwav_container_riff) {+ if (initialDataChunkSize > (0xFFFFFFFFUL - 36)) {+ return DRWAV_FALSE; /* Not enough room to store every sample. */
+ }
+ }
+ }
+
+ pWav->dataChunkDataSizeTargetWrite = initialDataChunkSize;
+
+
+ /* "RIFF" chunk. */
+ if (pFormat->container == drwav_container_riff) {+ drwav_uint32 chunkSizeRIFF = 28 + (drwav_uint32)initialDataChunkSize; /* +28 = "WAVE" + [sizeof "fmt " chunk] */
+ runningPos += drwav__write(pWav, "RIFF", 4);
+ runningPos += drwav__write_u32ne_to_le(pWav, chunkSizeRIFF);
+ runningPos += drwav__write(pWav, "WAVE", 4);
+ } else if (pFormat->container == drwav_container_w64) {+ drwav_uint64 chunkSizeRIFF = 80 + 24 + initialDataChunkSize; /* +24 because W64 includes the size of the GUID and size fields. */
+ runningPos += drwav__write(pWav, drwavGUID_W64_RIFF, 16);
+ runningPos += drwav__write_u64ne_to_le(pWav, chunkSizeRIFF);
+ runningPos += drwav__write(pWav, drwavGUID_W64_WAVE, 16);
+ } else if (pFormat->container == drwav_container_rf64) {+ runningPos += drwav__write(pWav, "RF64", 4);
+ runningPos += drwav__write_u32ne_to_le(pWav, 0xFFFFFFFF); /* Always 0xFFFFFFFF for RF64. Set to a proper value in the "ds64" chunk. */
+ runningPos += drwav__write(pWav, "WAVE", 4);
+ }
+
+
+ /* "ds64" chunk (RF64 only). */
+ if (pFormat->container == drwav_container_rf64) {+ drwav_uint32 initialds64ChunkSize = 28; /* 28 = [Size of RIFF (8 bytes)] + [Size of DATA (8 bytes)] + [Sample Count (8 bytes)] + [Table Length (4 bytes)]. Table length always set to 0. */
+ drwav_uint64 initialRiffChunkSize = 8 + initialds64ChunkSize + initialDataChunkSize; /* +8 for the ds64 header. */
+
+ runningPos += drwav__write(pWav, "ds64", 4);
+ runningPos += drwav__write_u32ne_to_le(pWav, initialds64ChunkSize); /* Size of ds64. */
+ runningPos += drwav__write_u64ne_to_le(pWav, initialRiffChunkSize); /* Size of RIFF. Set to true value at the end. */
+ runningPos += drwav__write_u64ne_to_le(pWav, initialDataChunkSize); /* Size of DATA. Set to true value at the end. */
+ runningPos += drwav__write_u64ne_to_le(pWav, totalSampleCount); /* Sample count. */
+ runningPos += drwav__write_u32ne_to_le(pWav, 0); /* Table length. Always set to zero in our case since we're not doing any other chunks than "DATA". */
+ }
+
+
+ /* "fmt " chunk. */
+ if (pFormat->container == drwav_container_riff || pFormat->container == drwav_container_rf64) {+ chunkSizeFMT = 16;
+ runningPos += drwav__write(pWav, "fmt ", 4);
+ runningPos += drwav__write_u32ne_to_le(pWav, (drwav_uint32)chunkSizeFMT);
+ } else if (pFormat->container == drwav_container_w64) {+ chunkSizeFMT = 40;
+ runningPos += drwav__write(pWav, drwavGUID_W64_FMT, 16);
+ runningPos += drwav__write_u64ne_to_le(pWav, chunkSizeFMT);
+ }
+
+ runningPos += drwav__write_u16ne_to_le(pWav, pWav->fmt.formatTag);
+ runningPos += drwav__write_u16ne_to_le(pWav, pWav->fmt.channels);
+ runningPos += drwav__write_u32ne_to_le(pWav, pWav->fmt.sampleRate);
+ runningPos += drwav__write_u32ne_to_le(pWav, pWav->fmt.avgBytesPerSec);
+ runningPos += drwav__write_u16ne_to_le(pWav, pWav->fmt.blockAlign);
+ runningPos += drwav__write_u16ne_to_le(pWav, pWav->fmt.bitsPerSample);
+
+ /* TODO: is a 'fact' chunk required for DR_WAVE_FORMAT_IEEE_FLOAT? */
+
+ if (!pWav->isSequentialWrite && pWav->pMetadata != NULL && pWav->metadataCount > 0 && (pFormat->container == drwav_container_riff || pFormat->container == drwav_container_rf64)) {+ runningPos += drwav__write_or_count_metadata(pWav, pWav->pMetadata, pWav->metadataCount);
+ }
+
+ pWav->dataChunkDataPos = runningPos;
+
+ /* "data" chunk. */
+ if (pFormat->container == drwav_container_riff) {+ drwav_uint32 chunkSizeDATA = (drwav_uint32)initialDataChunkSize;
+ runningPos += drwav__write(pWav, "data", 4);
+ runningPos += drwav__write_u32ne_to_le(pWav, chunkSizeDATA);
+ } else if (pFormat->container == drwav_container_w64) {+ drwav_uint64 chunkSizeDATA = 24 + initialDataChunkSize; /* +24 because W64 includes the size of the GUID and size fields. */
+ runningPos += drwav__write(pWav, drwavGUID_W64_DATA, 16);
+ runningPos += drwav__write_u64ne_to_le(pWav, chunkSizeDATA);
+ } else if (pFormat->container == drwav_container_rf64) {+ runningPos += drwav__write(pWav, "data", 4);
+ runningPos += drwav__write_u32ne_to_le(pWav, 0xFFFFFFFF); /* Always set to 0xFFFFFFFF for RF64. The true size of the data chunk is specified in the ds64 chunk. */
+ }
+
+ /* Set some properties for the client's convenience. */
+ pWav->container = pFormat->container;
+ pWav->channels = (drwav_uint16)pFormat->channels;
+ pWav->sampleRate = pFormat->sampleRate;
+ pWav->bitsPerSample = (drwav_uint16)pFormat->bitsPerSample;
+ pWav->translatedFormatTag = (drwav_uint16)pFormat->format;
+ pWav->dataChunkDataPos = runningPos;
+
+ return DRWAV_TRUE;
+}
+
+
+DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (!drwav_preinit_write(pWav, pFormat, DRWAV_FALSE, onWrite, onSeek, pUserData, pAllocationCallbacks)) {+ return DRWAV_FALSE;
+ }
+
+ return drwav_init_write__internal(pWav, pFormat, 0); /* DRWAV_FALSE = Not Sequential */
+}
+
+DRWAV_API drwav_bool32 drwav_init_write_sequential(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (!drwav_preinit_write(pWav, pFormat, DRWAV_TRUE, onWrite, NULL, pUserData, pAllocationCallbacks)) {+ return DRWAV_FALSE;
+ }
+
+ return drwav_init_write__internal(pWav, pFormat, totalSampleCount); /* DRWAV_TRUE = Sequential */
+}
+
+DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pFormat == NULL) {+ return DRWAV_FALSE;
+ }
+
+ return drwav_init_write_sequential(pWav, pFormat, totalPCMFrameCount*pFormat->channels, onWrite, pUserData, pAllocationCallbacks);
+}
+
+DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
+{+ if (!drwav_preinit_write(pWav, pFormat, DRWAV_FALSE, onWrite, onSeek, pUserData, pAllocationCallbacks)) {+ return DRWAV_FALSE;
+ }
+
+ pWav->pMetadata = pMetadata;
+ pWav->metadataCount = metadataCount;
+
+ return drwav_init_write__internal(pWav, pFormat, 0);
+}
+
+
+DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
+{+ /* Casting totalFrameCount to drwav_int64 for VC6 compatibility. No issues in practice because nobody is going to exhaust the whole 63 bits. */
+ drwav_uint64 targetDataSizeBytes = (drwav_uint64)((drwav_int64)totalFrameCount * pFormat->channels * pFormat->bitsPerSample/8.0);
+ drwav_uint64 riffChunkSizeBytes;
+ drwav_uint64 fileSizeBytes = 0;
+
+ if (pFormat->container == drwav_container_riff) {+ riffChunkSizeBytes = drwav__riff_chunk_size_riff(targetDataSizeBytes, pMetadata, metadataCount);
+ fileSizeBytes = (8 + riffChunkSizeBytes); /* +8 because WAV doesn't include the size of the ChunkID and ChunkSize fields. */
+ } else if (pFormat->container == drwav_container_w64) {+ riffChunkSizeBytes = drwav__riff_chunk_size_w64(targetDataSizeBytes);
+ fileSizeBytes = riffChunkSizeBytes;
+ } else if (pFormat->container == drwav_container_rf64) {+ riffChunkSizeBytes = drwav__riff_chunk_size_rf64(targetDataSizeBytes, pMetadata, metadataCount);
+ fileSizeBytes = (8 + riffChunkSizeBytes); /* +8 because WAV doesn't include the size of the ChunkID and ChunkSize fields. */
+ }
+
+ return fileSizeBytes;
+}
+
+
+#ifndef DR_WAV_NO_STDIO
+
+/* drwav_result_from_errno() is only used for fopen() and wfopen() so putting it inside DR_WAV_NO_STDIO for now. If something else needs this later we can move it out. */
+#include <errno.h>
+DRWAV_PRIVATE drwav_result drwav_result_from_errno(int e)
+{+ switch (e)
+ {+ case 0: return DRWAV_SUCCESS;
+ #ifdef EPERM
+ case EPERM: return DRWAV_INVALID_OPERATION;
+ #endif
+ #ifdef ENOENT
+ case ENOENT: return DRWAV_DOES_NOT_EXIST;
+ #endif
+ #ifdef ESRCH
+ case ESRCH: return DRWAV_DOES_NOT_EXIST;
+ #endif
+ #ifdef EINTR
+ case EINTR: return DRWAV_INTERRUPT;
+ #endif
+ #ifdef EIO
+ case EIO: return DRWAV_IO_ERROR;
+ #endif
+ #ifdef ENXIO
+ case ENXIO: return DRWAV_DOES_NOT_EXIST;
+ #endif
+ #ifdef E2BIG
+ case E2BIG: return DRWAV_INVALID_ARGS;
+ #endif
+ #ifdef ENOEXEC
+ case ENOEXEC: return DRWAV_INVALID_FILE;
+ #endif
+ #ifdef EBADF
+ case EBADF: return DRWAV_INVALID_FILE;
+ #endif
+ #ifdef ECHILD
+ case ECHILD: return DRWAV_ERROR;
+ #endif
+ #ifdef EAGAIN
+ case EAGAIN: return DRWAV_UNAVAILABLE;
+ #endif
+ #ifdef ENOMEM
+ case ENOMEM: return DRWAV_OUT_OF_MEMORY;
+ #endif
+ #ifdef EACCES
+ case EACCES: return DRWAV_ACCESS_DENIED;
+ #endif
+ #ifdef EFAULT
+ case EFAULT: return DRWAV_BAD_ADDRESS;
+ #endif
+ #ifdef ENOTBLK
+ case ENOTBLK: return DRWAV_ERROR;
+ #endif
+ #ifdef EBUSY
+ case EBUSY: return DRWAV_BUSY;
+ #endif
+ #ifdef EEXIST
+ case EEXIST: return DRWAV_ALREADY_EXISTS;
+ #endif
+ #ifdef EXDEV
+ case EXDEV: return DRWAV_ERROR;
+ #endif
+ #ifdef ENODEV
+ case ENODEV: return DRWAV_DOES_NOT_EXIST;
+ #endif
+ #ifdef ENOTDIR
+ case ENOTDIR: return DRWAV_NOT_DIRECTORY;
+ #endif
+ #ifdef EISDIR
+ case EISDIR: return DRWAV_IS_DIRECTORY;
+ #endif
+ #ifdef EINVAL
+ case EINVAL: return DRWAV_INVALID_ARGS;
+ #endif
+ #ifdef ENFILE
+ case ENFILE: return DRWAV_TOO_MANY_OPEN_FILES;
+ #endif
+ #ifdef EMFILE
+ case EMFILE: return DRWAV_TOO_MANY_OPEN_FILES;
+ #endif
+ #ifdef ENOTTY
+ case ENOTTY: return DRWAV_INVALID_OPERATION;
+ #endif
+ #ifdef ETXTBSY
+ case ETXTBSY: return DRWAV_BUSY;
+ #endif
+ #ifdef EFBIG
+ case EFBIG: return DRWAV_TOO_BIG;
+ #endif
+ #ifdef ENOSPC
+ case ENOSPC: return DRWAV_NO_SPACE;
+ #endif
+ #ifdef ESPIPE
+ case ESPIPE: return DRWAV_BAD_SEEK;
+ #endif
+ #ifdef EROFS
+ case EROFS: return DRWAV_ACCESS_DENIED;
+ #endif
+ #ifdef EMLINK
+ case EMLINK: return DRWAV_TOO_MANY_LINKS;
+ #endif
+ #ifdef EPIPE
+ case EPIPE: return DRWAV_BAD_PIPE;
+ #endif
+ #ifdef EDOM
+ case EDOM: return DRWAV_OUT_OF_RANGE;
+ #endif
+ #ifdef ERANGE
+ case ERANGE: return DRWAV_OUT_OF_RANGE;
+ #endif
+ #ifdef EDEADLK
+ case EDEADLK: return DRWAV_DEADLOCK;
+ #endif
+ #ifdef ENAMETOOLONG
+ case ENAMETOOLONG: return DRWAV_PATH_TOO_LONG;
+ #endif
+ #ifdef ENOLCK
+ case ENOLCK: return DRWAV_ERROR;
+ #endif
+ #ifdef ENOSYS
+ case ENOSYS: return DRWAV_NOT_IMPLEMENTED;
+ #endif
+ #ifdef ENOTEMPTY
+ case ENOTEMPTY: return DRWAV_DIRECTORY_NOT_EMPTY;
+ #endif
+ #ifdef ELOOP
+ case ELOOP: return DRWAV_TOO_MANY_LINKS;
+ #endif
+ #ifdef ENOMSG
+ case ENOMSG: return DRWAV_NO_MESSAGE;
+ #endif
+ #ifdef EIDRM
+ case EIDRM: return DRWAV_ERROR;
+ #endif
+ #ifdef ECHRNG
+ case ECHRNG: return DRWAV_ERROR;
+ #endif
+ #ifdef EL2NSYNC
+ case EL2NSYNC: return DRWAV_ERROR;
+ #endif
+ #ifdef EL3HLT
+ case EL3HLT: return DRWAV_ERROR;
+ #endif
+ #ifdef EL3RST
+ case EL3RST: return DRWAV_ERROR;
+ #endif
+ #ifdef ELNRNG
+ case ELNRNG: return DRWAV_OUT_OF_RANGE;
+ #endif
+ #ifdef EUNATCH
+ case EUNATCH: return DRWAV_ERROR;
+ #endif
+ #ifdef ENOCSI
+ case ENOCSI: return DRWAV_ERROR;
+ #endif
+ #ifdef EL2HLT
+ case EL2HLT: return DRWAV_ERROR;
+ #endif
+ #ifdef EBADE
+ case EBADE: return DRWAV_ERROR;
+ #endif
+ #ifdef EBADR
+ case EBADR: return DRWAV_ERROR;
+ #endif
+ #ifdef EXFULL
+ case EXFULL: return DRWAV_ERROR;
+ #endif
+ #ifdef ENOANO
+ case ENOANO: return DRWAV_ERROR;
+ #endif
+ #ifdef EBADRQC
+ case EBADRQC: return DRWAV_ERROR;
+ #endif
+ #ifdef EBADSLT
+ case EBADSLT: return DRWAV_ERROR;
+ #endif
+ #ifdef EBFONT
+ case EBFONT: return DRWAV_INVALID_FILE;
+ #endif
+ #ifdef ENOSTR
+ case ENOSTR: return DRWAV_ERROR;
+ #endif
+ #ifdef ENODATA
+ case ENODATA: return DRWAV_NO_DATA_AVAILABLE;
+ #endif
+ #ifdef ETIME
+ case ETIME: return DRWAV_TIMEOUT;
+ #endif
+ #ifdef ENOSR
+ case ENOSR: return DRWAV_NO_DATA_AVAILABLE;
+ #endif
+ #ifdef ENONET
+ case ENONET: return DRWAV_NO_NETWORK;
+ #endif
+ #ifdef ENOPKG
+ case ENOPKG: return DRWAV_ERROR;
+ #endif
+ #ifdef EREMOTE
+ case EREMOTE: return DRWAV_ERROR;
+ #endif
+ #ifdef ENOLINK
+ case ENOLINK: return DRWAV_ERROR;
+ #endif
+ #ifdef EADV
+ case EADV: return DRWAV_ERROR;
+ #endif
+ #ifdef ESRMNT
+ case ESRMNT: return DRWAV_ERROR;
+ #endif
+ #ifdef ECOMM
+ case ECOMM: return DRWAV_ERROR;
+ #endif
+ #ifdef EPROTO
+ case EPROTO: return DRWAV_ERROR;
+ #endif
+ #ifdef EMULTIHOP
+ case EMULTIHOP: return DRWAV_ERROR;
+ #endif
+ #ifdef EDOTDOT
+ case EDOTDOT: return DRWAV_ERROR;
+ #endif
+ #ifdef EBADMSG
+ case EBADMSG: return DRWAV_BAD_MESSAGE;
+ #endif
+ #ifdef EOVERFLOW
+ case EOVERFLOW: return DRWAV_TOO_BIG;
+ #endif
+ #ifdef ENOTUNIQ
+ case ENOTUNIQ: return DRWAV_NOT_UNIQUE;
+ #endif
+ #ifdef EBADFD
+ case EBADFD: return DRWAV_ERROR;
+ #endif
+ #ifdef EREMCHG
+ case EREMCHG: return DRWAV_ERROR;
+ #endif
+ #ifdef ELIBACC
+ case ELIBACC: return DRWAV_ACCESS_DENIED;
+ #endif
+ #ifdef ELIBBAD
+ case ELIBBAD: return DRWAV_INVALID_FILE;
+ #endif
+ #ifdef ELIBSCN
+ case ELIBSCN: return DRWAV_INVALID_FILE;
+ #endif
+ #ifdef ELIBMAX
+ case ELIBMAX: return DRWAV_ERROR;
+ #endif
+ #ifdef ELIBEXEC
+ case ELIBEXEC: return DRWAV_ERROR;
+ #endif
+ #ifdef EILSEQ
+ case EILSEQ: return DRWAV_INVALID_DATA;
+ #endif
+ #ifdef ERESTART
+ case ERESTART: return DRWAV_ERROR;
+ #endif
+ #ifdef ESTRPIPE
+ case ESTRPIPE: return DRWAV_ERROR;
+ #endif
+ #ifdef EUSERS
+ case EUSERS: return DRWAV_ERROR;
+ #endif
+ #ifdef ENOTSOCK
+ case ENOTSOCK: return DRWAV_NOT_SOCKET;
+ #endif
+ #ifdef EDESTADDRREQ
+ case EDESTADDRREQ: return DRWAV_NO_ADDRESS;
+ #endif
+ #ifdef EMSGSIZE
+ case EMSGSIZE: return DRWAV_TOO_BIG;
+ #endif
+ #ifdef EPROTOTYPE
+ case EPROTOTYPE: return DRWAV_BAD_PROTOCOL;
+ #endif
+ #ifdef ENOPROTOOPT
+ case ENOPROTOOPT: return DRWAV_PROTOCOL_UNAVAILABLE;
+ #endif
+ #ifdef EPROTONOSUPPORT
+ case EPROTONOSUPPORT: return DRWAV_PROTOCOL_NOT_SUPPORTED;
+ #endif
+ #ifdef ESOCKTNOSUPPORT
+ case ESOCKTNOSUPPORT: return DRWAV_SOCKET_NOT_SUPPORTED;
+ #endif
+ #ifdef EOPNOTSUPP
+ case EOPNOTSUPP: return DRWAV_INVALID_OPERATION;
+ #endif
+ #ifdef EPFNOSUPPORT
+ case EPFNOSUPPORT: return DRWAV_PROTOCOL_FAMILY_NOT_SUPPORTED;
+ #endif
+ #ifdef EAFNOSUPPORT
+ case EAFNOSUPPORT: return DRWAV_ADDRESS_FAMILY_NOT_SUPPORTED;
+ #endif
+ #ifdef EADDRINUSE
+ case EADDRINUSE: return DRWAV_ALREADY_IN_USE;
+ #endif
+ #ifdef EADDRNOTAVAIL
+ case EADDRNOTAVAIL: return DRWAV_ERROR;
+ #endif
+ #ifdef ENETDOWN
+ case ENETDOWN: return DRWAV_NO_NETWORK;
+ #endif
+ #ifdef ENETUNREACH
+ case ENETUNREACH: return DRWAV_NO_NETWORK;
+ #endif
+ #ifdef ENETRESET
+ case ENETRESET: return DRWAV_NO_NETWORK;
+ #endif
+ #ifdef ECONNABORTED
+ case ECONNABORTED: return DRWAV_NO_NETWORK;
+ #endif
+ #ifdef ECONNRESET
+ case ECONNRESET: return DRWAV_CONNECTION_RESET;
+ #endif
+ #ifdef ENOBUFS
+ case ENOBUFS: return DRWAV_NO_SPACE;
+ #endif
+ #ifdef EISCONN
+ case EISCONN: return DRWAV_ALREADY_CONNECTED;
+ #endif
+ #ifdef ENOTCONN
+ case ENOTCONN: return DRWAV_NOT_CONNECTED;
+ #endif
+ #ifdef ESHUTDOWN
+ case ESHUTDOWN: return DRWAV_ERROR;
+ #endif
+ #ifdef ETOOMANYREFS
+ case ETOOMANYREFS: return DRWAV_ERROR;
+ #endif
+ #ifdef ETIMEDOUT
+ case ETIMEDOUT: return DRWAV_TIMEOUT;
+ #endif
+ #ifdef ECONNREFUSED
+ case ECONNREFUSED: return DRWAV_CONNECTION_REFUSED;
+ #endif
+ #ifdef EHOSTDOWN
+ case EHOSTDOWN: return DRWAV_NO_HOST;
+ #endif
+ #ifdef EHOSTUNREACH
+ case EHOSTUNREACH: return DRWAV_NO_HOST;
+ #endif
+ #ifdef EALREADY
+ case EALREADY: return DRWAV_IN_PROGRESS;
+ #endif
+ #ifdef EINPROGRESS
+ case EINPROGRESS: return DRWAV_IN_PROGRESS;
+ #endif
+ #ifdef ESTALE
+ case ESTALE: return DRWAV_INVALID_FILE;
+ #endif
+ #ifdef EUCLEAN
+ case EUCLEAN: return DRWAV_ERROR;
+ #endif
+ #ifdef ENOTNAM
+ case ENOTNAM: return DRWAV_ERROR;
+ #endif
+ #ifdef ENAVAIL
+ case ENAVAIL: return DRWAV_ERROR;
+ #endif
+ #ifdef EISNAM
+ case EISNAM: return DRWAV_ERROR;
+ #endif
+ #ifdef EREMOTEIO
+ case EREMOTEIO: return DRWAV_IO_ERROR;
+ #endif
+ #ifdef EDQUOT
+ case EDQUOT: return DRWAV_NO_SPACE;
+ #endif
+ #ifdef ENOMEDIUM
+ case ENOMEDIUM: return DRWAV_DOES_NOT_EXIST;
+ #endif
+ #ifdef EMEDIUMTYPE
+ case EMEDIUMTYPE: return DRWAV_ERROR;
+ #endif
+ #ifdef ECANCELED
+ case ECANCELED: return DRWAV_CANCELLED;
+ #endif
+ #ifdef ENOKEY
+ case ENOKEY: return DRWAV_ERROR;
+ #endif
+ #ifdef EKEYEXPIRED
+ case EKEYEXPIRED: return DRWAV_ERROR;
+ #endif
+ #ifdef EKEYREVOKED
+ case EKEYREVOKED: return DRWAV_ERROR;
+ #endif
+ #ifdef EKEYREJECTED
+ case EKEYREJECTED: return DRWAV_ERROR;
+ #endif
+ #ifdef EOWNERDEAD
+ case EOWNERDEAD: return DRWAV_ERROR;
+ #endif
+ #ifdef ENOTRECOVERABLE
+ case ENOTRECOVERABLE: return DRWAV_ERROR;
+ #endif
+ #ifdef ERFKILL
+ case ERFKILL: return DRWAV_ERROR;
+ #endif
+ #ifdef EHWPOISON
+ case EHWPOISON: return DRWAV_ERROR;
+ #endif
+ default: return DRWAV_ERROR;
+ }
+}
+
+DRWAV_PRIVATE drwav_result drwav_fopen(FILE** ppFile, const char* pFilePath, const char* pOpenMode)
+{+#if defined(_MSC_VER) && _MSC_VER >= 1400
+ errno_t err;
+#endif
+
+ if (ppFile != NULL) {+ *ppFile = NULL; /* Safety. */
+ }
+
+ if (pFilePath == NULL || pOpenMode == NULL || ppFile == NULL) {+ return DRWAV_INVALID_ARGS;
+ }
+
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+ err = fopen_s(ppFile, pFilePath, pOpenMode);
+ if (err != 0) {+ return drwav_result_from_errno(err);
+ }
+#else
+#if defined(_WIN32) || defined(__APPLE__)
+ *ppFile = fopen(pFilePath, pOpenMode);
+#else
+ #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64 && defined(_LARGEFILE64_SOURCE)
+ *ppFile = fopen64(pFilePath, pOpenMode);
+ #else
+ *ppFile = fopen(pFilePath, pOpenMode);
+ #endif
+#endif
+ if (*ppFile == NULL) {+ drwav_result result = drwav_result_from_errno(errno);
+ if (result == DRWAV_SUCCESS) {+ result = DRWAV_ERROR; /* Just a safety check to make sure we never ever return success when pFile == NULL. */
+ }
+
+ return result;
+ }
+#endif
+
+ return DRWAV_SUCCESS;
+}
+
+/*
+_wfopen() isn't always available in all compilation environments.
+
+ * Windows only.
+ * MSVC seems to support it universally as far back as VC6 from what I can tell (haven't checked further back).
+ * MinGW-64 (both 32- and 64-bit) seems to support it.
+ * MinGW wraps it in !defined(__STRICT_ANSI__).
+ * OpenWatcom wraps it in !defined(_NO_EXT_KEYS).
+
+This can be reviewed as compatibility issues arise. The preference is to use _wfopen_s() and _wfopen() as opposed to the wcsrtombs()
+fallback, so if you notice your compiler not detecting this properly I'm happy to look at adding support.
+*/
+#if defined(_WIN32)
+ #if defined(_MSC_VER) || defined(__MINGW64__) || (!defined(__STRICT_ANSI__) && !defined(_NO_EXT_KEYS))
+ #define DRWAV_HAS_WFOPEN
+ #endif
+#endif
+
+#ifndef DR_WAV_NO_WCHAR
+DRWAV_PRIVATE drwav_result drwav_wfopen(FILE** ppFile, const wchar_t* pFilePath, const wchar_t* pOpenMode, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (ppFile != NULL) {+ *ppFile = NULL; /* Safety. */
+ }
+
+ if (pFilePath == NULL || pOpenMode == NULL || ppFile == NULL) {+ return DRWAV_INVALID_ARGS;
+ }
+
+#if defined(DRWAV_HAS_WFOPEN)
+ {+ /* Use _wfopen() on Windows. */
+ #if defined(_MSC_VER) && _MSC_VER >= 1400
+ errno_t err = _wfopen_s(ppFile, pFilePath, pOpenMode);
+ if (err != 0) {+ return drwav_result_from_errno(err);
+ }
+ #else
+ *ppFile = _wfopen(pFilePath, pOpenMode);
+ if (*ppFile == NULL) {+ return drwav_result_from_errno(errno);
+ }
+ #endif
+ (void)pAllocationCallbacks;
+ }
+#else
+ /*
+ Use fopen() on anything other than Windows. Requires a conversion. This is annoying because
+ fopen() is locale specific. The only real way I can think of to do this is with wcsrtombs(). Note
+ that wcstombs() is apparently not thread-safe because it uses a static global mbstate_t object for
+ maintaining state. I've checked this with -std=c89 and it works, but if somebody get's a compiler
+ error I'll look into improving compatibility.
+ */
+
+ /*
+ Some compilers don't support wchar_t or wcsrtombs() which we're using below. In this case we just
+ need to abort with an error. If you encounter a compiler lacking such support, add it to this list
+ and submit a bug report and it'll be added to the library upstream.
+ */
+ #if defined(__DJGPP__)
+ {+ /* Nothing to do here. This will fall through to the error check below. */
+ }
+ #else
+ {+ mbstate_t mbs;
+ size_t lenMB;
+ const wchar_t* pFilePathTemp = pFilePath;
+ char* pFilePathMB = NULL;
+ char pOpenModeMB[32] = {0};+
+ /* Get the length first. */
+ DRWAV_ZERO_OBJECT(&mbs);
+ lenMB = wcsrtombs(NULL, &pFilePathTemp, 0, &mbs);
+ if (lenMB == (size_t)-1) {+ return drwav_result_from_errno(errno);
+ }
+
+ pFilePathMB = (char*)drwav__malloc_from_callbacks(lenMB + 1, pAllocationCallbacks);
+ if (pFilePathMB == NULL) {+ return DRWAV_OUT_OF_MEMORY;
+ }
+
+ pFilePathTemp = pFilePath;
+ DRWAV_ZERO_OBJECT(&mbs);
+ wcsrtombs(pFilePathMB, &pFilePathTemp, lenMB + 1, &mbs);
+
+ /* The open mode should always consist of ASCII characters so we should be able to do a trivial conversion. */
+ {+ size_t i = 0;
+ for (;;) {+ if (pOpenMode[i] == 0) {+ pOpenModeMB[i] = '\0';
+ break;
+ }
+
+ pOpenModeMB[i] = (char)pOpenMode[i];
+ i += 1;
+ }
+ }
+
+ *ppFile = fopen(pFilePathMB, pOpenModeMB);
+
+ drwav__free_from_callbacks(pFilePathMB, pAllocationCallbacks);
+ }
+ #endif
+
+ if (*ppFile == NULL) {+ return DRWAV_ERROR;
+ }
+#endif
+
+ return DRWAV_SUCCESS;
+}
+#endif
+
+
+DRWAV_PRIVATE size_t drwav__on_read_stdio(void* pUserData, void* pBufferOut, size_t bytesToRead)
+{+ return fread(pBufferOut, 1, bytesToRead, (FILE*)pUserData);
+}
+
+DRWAV_PRIVATE size_t drwav__on_write_stdio(void* pUserData, const void* pData, size_t bytesToWrite)
+{+ return fwrite(pData, 1, bytesToWrite, (FILE*)pUserData);
+}
+
+DRWAV_PRIVATE drwav_bool32 drwav__on_seek_stdio(void* pUserData, int offset, drwav_seek_origin origin)
+{+ return fseek((FILE*)pUserData, offset, (origin == drwav_seek_origin_current) ? SEEK_CUR : SEEK_SET) == 0;
+}
+
+DRWAV_API drwav_bool32 drwav_init_file(drwav* pWav, const char* filename, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ return drwav_init_file_ex(pWav, filename, NULL, NULL, 0, pAllocationCallbacks);
+}
+
+
+DRWAV_PRIVATE drwav_bool32 drwav_init_file__internal_FILE(drwav* pWav, FILE* pFile, drwav_chunk_proc onChunk, void* pChunkUserData, drwav_uint32 flags, drwav_metadata_type allowedMetadataTypes, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav_bool32 result;
+
+ result = drwav_preinit(pWav, drwav__on_read_stdio, drwav__on_seek_stdio, (void*)pFile, pAllocationCallbacks);
+ if (result != DRWAV_TRUE) {+ fclose(pFile);
+ return result;
+ }
+
+ pWav->allowedMetadataTypes = allowedMetadataTypes;
+
+ result = drwav_init__internal(pWav, onChunk, pChunkUserData, flags);
+ if (result != DRWAV_TRUE) {+ fclose(pFile);
+ return result;
+ }
+
+ return DRWAV_TRUE;
+}
+
+DRWAV_API drwav_bool32 drwav_init_file_ex(drwav* pWav, const char* filename, drwav_chunk_proc onChunk, void* pChunkUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ FILE* pFile;
+ if (drwav_fopen(&pFile, filename, "rb") != DRWAV_SUCCESS) {+ return DRWAV_FALSE;
+ }
+
+ /* This takes ownership of the FILE* object. */
+ return drwav_init_file__internal_FILE(pWav, pFile, onChunk, pChunkUserData, flags, drwav_metadata_type_none, pAllocationCallbacks);
+}
+
+#ifndef DR_WAV_NO_WCHAR
+DRWAV_API drwav_bool32 drwav_init_file_w(drwav* pWav, const wchar_t* filename, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ return drwav_init_file_ex_w(pWav, filename, NULL, NULL, 0, pAllocationCallbacks);
+}
+
+DRWAV_API drwav_bool32 drwav_init_file_ex_w(drwav* pWav, const wchar_t* filename, drwav_chunk_proc onChunk, void* pChunkUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ FILE* pFile;
+ if (drwav_wfopen(&pFile, filename, L"rb", pAllocationCallbacks) != DRWAV_SUCCESS) {+ return DRWAV_FALSE;
+ }
+
+ /* This takes ownership of the FILE* object. */
+ return drwav_init_file__internal_FILE(pWav, pFile, onChunk, pChunkUserData, flags, drwav_metadata_type_none, pAllocationCallbacks);
+}
+#endif
+
+DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ FILE* pFile;
+ if (drwav_fopen(&pFile, filename, "rb") != DRWAV_SUCCESS) {+ return DRWAV_FALSE;
+ }
+
+ /* This takes ownership of the FILE* object. */
+ return drwav_init_file__internal_FILE(pWav, pFile, NULL, NULL, flags, drwav_metadata_type_all_including_unknown, pAllocationCallbacks);
+}
+
+#ifndef DR_WAV_NO_WCHAR
+DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ FILE* pFile;
+ if (drwav_wfopen(&pFile, filename, L"rb", pAllocationCallbacks) != DRWAV_SUCCESS) {+ return DRWAV_FALSE;
+ }
+
+ /* This takes ownership of the FILE* object. */
+ return drwav_init_file__internal_FILE(pWav, pFile, NULL, NULL, flags, drwav_metadata_type_all_including_unknown, pAllocationCallbacks);
+}
+#endif
+
+
+DRWAV_PRIVATE drwav_bool32 drwav_init_file_write__internal_FILE(drwav* pWav, FILE* pFile, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, drwav_bool32 isSequential, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav_bool32 result;
+
+ result = drwav_preinit_write(pWav, pFormat, isSequential, drwav__on_write_stdio, drwav__on_seek_stdio, (void*)pFile, pAllocationCallbacks);
+ if (result != DRWAV_TRUE) {+ fclose(pFile);
+ return result;
+ }
+
+ result = drwav_init_write__internal(pWav, pFormat, totalSampleCount);
+ if (result != DRWAV_TRUE) {+ fclose(pFile);
+ return result;
+ }
+
+ return DRWAV_TRUE;
+}
+
+DRWAV_PRIVATE drwav_bool32 drwav_init_file_write__internal(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, drwav_bool32 isSequential, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ FILE* pFile;
+ if (drwav_fopen(&pFile, filename, "wb") != DRWAV_SUCCESS) {+ return DRWAV_FALSE;
+ }
+
+ /* This takes ownership of the FILE* object. */
+ return drwav_init_file_write__internal_FILE(pWav, pFile, pFormat, totalSampleCount, isSequential, pAllocationCallbacks);
+}
+
+#ifndef DR_WAV_NO_WCHAR
+DRWAV_PRIVATE drwav_bool32 drwav_init_file_write_w__internal(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, drwav_bool32 isSequential, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ FILE* pFile;
+ if (drwav_wfopen(&pFile, filename, L"wb", pAllocationCallbacks) != DRWAV_SUCCESS) {+ return DRWAV_FALSE;
+ }
+
+ /* This takes ownership of the FILE* object. */
+ return drwav_init_file_write__internal_FILE(pWav, pFile, pFormat, totalSampleCount, isSequential, pAllocationCallbacks);
+}
+#endif
+
+DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ return drwav_init_file_write__internal(pWav, filename, pFormat, 0, DRWAV_FALSE, pAllocationCallbacks);
+}
+
+DRWAV_API drwav_bool32 drwav_init_file_write_sequential(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ return drwav_init_file_write__internal(pWav, filename, pFormat, totalSampleCount, DRWAV_TRUE, pAllocationCallbacks);
+}
+
+DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pFormat == NULL) {+ return DRWAV_FALSE;
+ }
+
+ return drwav_init_file_write_sequential(pWav, filename, pFormat, totalPCMFrameCount*pFormat->channels, pAllocationCallbacks);
+}
+
+#ifndef DR_WAV_NO_WCHAR
+DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ return drwav_init_file_write_w__internal(pWav, filename, pFormat, 0, DRWAV_FALSE, pAllocationCallbacks);
+}
+
+DRWAV_API drwav_bool32 drwav_init_file_write_sequential_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ return drwav_init_file_write_w__internal(pWav, filename, pFormat, totalSampleCount, DRWAV_TRUE, pAllocationCallbacks);
+}
+
+DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pFormat == NULL) {+ return DRWAV_FALSE;
+ }
+
+ return drwav_init_file_write_sequential_w(pWav, filename, pFormat, totalPCMFrameCount*pFormat->channels, pAllocationCallbacks);
+}
+#endif
+#endif /* DR_WAV_NO_STDIO */
+
+
+DRWAV_PRIVATE size_t drwav__on_read_memory(void* pUserData, void* pBufferOut, size_t bytesToRead)
+{+ drwav* pWav = (drwav*)pUserData;
+ size_t bytesRemaining;
+
+ DRWAV_ASSERT(pWav != NULL);
+ DRWAV_ASSERT(pWav->memoryStream.dataSize >= pWav->memoryStream.currentReadPos);
+
+ bytesRemaining = pWav->memoryStream.dataSize - pWav->memoryStream.currentReadPos;
+ if (bytesToRead > bytesRemaining) {+ bytesToRead = bytesRemaining;
+ }
+
+ if (bytesToRead > 0) {+ DRWAV_COPY_MEMORY(pBufferOut, pWav->memoryStream.data + pWav->memoryStream.currentReadPos, bytesToRead);
+ pWav->memoryStream.currentReadPos += bytesToRead;
+ }
+
+ return bytesToRead;
+}
+
+DRWAV_PRIVATE drwav_bool32 drwav__on_seek_memory(void* pUserData, int offset, drwav_seek_origin origin)
+{+ drwav* pWav = (drwav*)pUserData;
+ DRWAV_ASSERT(pWav != NULL);
+
+ if (origin == drwav_seek_origin_current) {+ if (offset > 0) {+ if (pWav->memoryStream.currentReadPos + offset > pWav->memoryStream.dataSize) {+ return DRWAV_FALSE; /* Trying to seek too far forward. */
+ }
+ } else {+ if (pWav->memoryStream.currentReadPos < (size_t)-offset) {+ return DRWAV_FALSE; /* Trying to seek too far backwards. */
+ }
+ }
+
+ /* This will never underflow thanks to the clamps above. */
+ pWav->memoryStream.currentReadPos += offset;
+ } else {+ if ((drwav_uint32)offset <= pWav->memoryStream.dataSize) {+ pWav->memoryStream.currentReadPos = offset;
+ } else {+ return DRWAV_FALSE; /* Trying to seek too far forward. */
+ }
+ }
+
+ return DRWAV_TRUE;
+}
+
+DRWAV_PRIVATE size_t drwav__on_write_memory(void* pUserData, const void* pDataIn, size_t bytesToWrite)
+{+ drwav* pWav = (drwav*)pUserData;
+ size_t bytesRemaining;
+
+ DRWAV_ASSERT(pWav != NULL);
+ DRWAV_ASSERT(pWav->memoryStreamWrite.dataCapacity >= pWav->memoryStreamWrite.currentWritePos);
+
+ bytesRemaining = pWav->memoryStreamWrite.dataCapacity - pWav->memoryStreamWrite.currentWritePos;
+ if (bytesRemaining < bytesToWrite) {+ /* Need to reallocate. */
+ void* pNewData;
+ size_t newDataCapacity = (pWav->memoryStreamWrite.dataCapacity == 0) ? 256 : pWav->memoryStreamWrite.dataCapacity * 2;
+
+ /* If doubling wasn't enough, just make it the minimum required size to write the data. */
+ if ((newDataCapacity - pWav->memoryStreamWrite.currentWritePos) < bytesToWrite) {+ newDataCapacity = pWav->memoryStreamWrite.currentWritePos + bytesToWrite;
+ }
+
+ pNewData = drwav__realloc_from_callbacks(*pWav->memoryStreamWrite.ppData, newDataCapacity, pWav->memoryStreamWrite.dataCapacity, &pWav->allocationCallbacks);
+ if (pNewData == NULL) {+ return 0;
+ }
+
+ *pWav->memoryStreamWrite.ppData = pNewData;
+ pWav->memoryStreamWrite.dataCapacity = newDataCapacity;
+ }
+
+ DRWAV_COPY_MEMORY(((drwav_uint8*)(*pWav->memoryStreamWrite.ppData)) + pWav->memoryStreamWrite.currentWritePos, pDataIn, bytesToWrite);
+
+ pWav->memoryStreamWrite.currentWritePos += bytesToWrite;
+ if (pWav->memoryStreamWrite.dataSize < pWav->memoryStreamWrite.currentWritePos) {+ pWav->memoryStreamWrite.dataSize = pWav->memoryStreamWrite.currentWritePos;
+ }
+
+ *pWav->memoryStreamWrite.pDataSize = pWav->memoryStreamWrite.dataSize;
+
+ return bytesToWrite;
+}
+
+DRWAV_PRIVATE drwav_bool32 drwav__on_seek_memory_write(void* pUserData, int offset, drwav_seek_origin origin)
+{+ drwav* pWav = (drwav*)pUserData;
+ DRWAV_ASSERT(pWav != NULL);
+
+ if (origin == drwav_seek_origin_current) {+ if (offset > 0) {+ if (pWav->memoryStreamWrite.currentWritePos + offset > pWav->memoryStreamWrite.dataSize) {+ offset = (int)(pWav->memoryStreamWrite.dataSize - pWav->memoryStreamWrite.currentWritePos); /* Trying to seek too far forward. */
+ }
+ } else {+ if (pWav->memoryStreamWrite.currentWritePos < (size_t)-offset) {+ offset = -(int)pWav->memoryStreamWrite.currentWritePos; /* Trying to seek too far backwards. */
+ }
+ }
+
+ /* This will never underflow thanks to the clamps above. */
+ pWav->memoryStreamWrite.currentWritePos += offset;
+ } else {+ if ((drwav_uint32)offset <= pWav->memoryStreamWrite.dataSize) {+ pWav->memoryStreamWrite.currentWritePos = offset;
+ } else {+ pWav->memoryStreamWrite.currentWritePos = pWav->memoryStreamWrite.dataSize; /* Trying to seek too far forward. */
+ }
+ }
+
+ return DRWAV_TRUE;
+}
+
+DRWAV_API drwav_bool32 drwav_init_memory(drwav* pWav, const void* data, size_t dataSize, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ return drwav_init_memory_ex(pWav, data, dataSize, NULL, NULL, 0, pAllocationCallbacks);
+}
+
+DRWAV_API drwav_bool32 drwav_init_memory_ex(drwav* pWav, const void* data, size_t dataSize, drwav_chunk_proc onChunk, void* pChunkUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (data == NULL || dataSize == 0) {+ return DRWAV_FALSE;
+ }
+
+ if (!drwav_preinit(pWav, drwav__on_read_memory, drwav__on_seek_memory, pWav, pAllocationCallbacks)) {+ return DRWAV_FALSE;
+ }
+
+ pWav->memoryStream.data = (const drwav_uint8*)data;
+ pWav->memoryStream.dataSize = dataSize;
+ pWav->memoryStream.currentReadPos = 0;
+
+ return drwav_init__internal(pWav, onChunk, pChunkUserData, flags);
+}
+
+DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (data == NULL || dataSize == 0) {+ return DRWAV_FALSE;
+ }
+
+ if (!drwav_preinit(pWav, drwav__on_read_memory, drwav__on_seek_memory, pWav, pAllocationCallbacks)) {+ return DRWAV_FALSE;
+ }
+
+ pWav->memoryStream.data = (const drwav_uint8*)data;
+ pWav->memoryStream.dataSize = dataSize;
+ pWav->memoryStream.currentReadPos = 0;
+
+ pWav->allowedMetadataTypes = drwav_metadata_type_all_including_unknown;
+
+ return drwav_init__internal(pWav, NULL, NULL, flags);
+}
+
+
+DRWAV_PRIVATE drwav_bool32 drwav_init_memory_write__internal(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, drwav_bool32 isSequential, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (ppData == NULL || pDataSize == NULL) {+ return DRWAV_FALSE;
+ }
+
+ *ppData = NULL; /* Important because we're using realloc()! */
+ *pDataSize = 0;
+
+ if (!drwav_preinit_write(pWav, pFormat, isSequential, drwav__on_write_memory, drwav__on_seek_memory_write, pWav, pAllocationCallbacks)) {+ return DRWAV_FALSE;
+ }
+
+ pWav->memoryStreamWrite.ppData = ppData;
+ pWav->memoryStreamWrite.pDataSize = pDataSize;
+ pWav->memoryStreamWrite.dataSize = 0;
+ pWav->memoryStreamWrite.dataCapacity = 0;
+ pWav->memoryStreamWrite.currentWritePos = 0;
+
+ return drwav_init_write__internal(pWav, pFormat, totalSampleCount);
+}
+
+DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ return drwav_init_memory_write__internal(pWav, ppData, pDataSize, pFormat, 0, DRWAV_FALSE, pAllocationCallbacks);
+}
+
+DRWAV_API drwav_bool32 drwav_init_memory_write_sequential(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalSampleCount, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ return drwav_init_memory_write__internal(pWav, ppData, pDataSize, pFormat, totalSampleCount, DRWAV_TRUE, pAllocationCallbacks);
+}
+
+DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pFormat == NULL) {+ return DRWAV_FALSE;
+ }
+
+ return drwav_init_memory_write_sequential(pWav, ppData, pDataSize, pFormat, totalPCMFrameCount*pFormat->channels, pAllocationCallbacks);
+}
+
+
+
+DRWAV_API drwav_result drwav_uninit(drwav* pWav)
+{+ drwav_result result = DRWAV_SUCCESS;
+
+ if (pWav == NULL) {+ return DRWAV_INVALID_ARGS;
+ }
+
+ /*
+ If the drwav object was opened in write mode we'll need to finalize a few things:
+ - Make sure the "data" chunk is aligned to 16-bits for RIFF containers, or 64 bits for W64 containers.
+ - Set the size of the "data" chunk.
+ */
+ if (pWav->onWrite != NULL) {+ drwav_uint32 paddingSize = 0;
+
+ /* Padding. Do not adjust pWav->dataChunkDataSize - this should not include the padding. */
+ if (pWav->container == drwav_container_riff || pWav->container == drwav_container_rf64) {+ paddingSize = drwav__chunk_padding_size_riff(pWav->dataChunkDataSize);
+ } else {+ paddingSize = drwav__chunk_padding_size_w64(pWav->dataChunkDataSize);
+ }
+
+ if (paddingSize > 0) {+ drwav_uint64 paddingData = 0;
+ drwav__write(pWav, &paddingData, paddingSize); /* Byte order does not matter for this. */
+ }
+
+ /*
+ Chunk sizes. When using sequential mode, these will have been filled in at initialization time. We only need
+ to do this when using non-sequential mode.
+ */
+ if (pWav->onSeek && !pWav->isSequentialWrite) {+ if (pWav->container == drwav_container_riff) {+ /* The "RIFF" chunk size. */
+ if (pWav->onSeek(pWav->pUserData, 4, drwav_seek_origin_start)) {+ drwav_uint32 riffChunkSize = drwav__riff_chunk_size_riff(pWav->dataChunkDataSize, pWav->pMetadata, pWav->metadataCount);
+ drwav__write_u32ne_to_le(pWav, riffChunkSize);
+ }
+
+ /* The "data" chunk size. */
+ if (pWav->onSeek(pWav->pUserData, (int)pWav->dataChunkDataPos - 4, drwav_seek_origin_start)) {+ drwav_uint32 dataChunkSize = drwav__data_chunk_size_riff(pWav->dataChunkDataSize);
+ drwav__write_u32ne_to_le(pWav, dataChunkSize);
+ }
+ } else if (pWav->container == drwav_container_w64) {+ /* The "RIFF" chunk size. */
+ if (pWav->onSeek(pWav->pUserData, 16, drwav_seek_origin_start)) {+ drwav_uint64 riffChunkSize = drwav__riff_chunk_size_w64(pWav->dataChunkDataSize);
+ drwav__write_u64ne_to_le(pWav, riffChunkSize);
+ }
+
+ /* The "data" chunk size. */
+ if (pWav->onSeek(pWav->pUserData, (int)pWav->dataChunkDataPos - 8, drwav_seek_origin_start)) {+ drwav_uint64 dataChunkSize = drwav__data_chunk_size_w64(pWav->dataChunkDataSize);
+ drwav__write_u64ne_to_le(pWav, dataChunkSize);
+ }
+ } else if (pWav->container == drwav_container_rf64) {+ /* We only need to update the ds64 chunk. The "RIFF" and "data" chunks always have their sizes set to 0xFFFFFFFF for RF64. */
+ int ds64BodyPos = 12 + 8;
+
+ /* The "RIFF" chunk size. */
+ if (pWav->onSeek(pWav->pUserData, ds64BodyPos + 0, drwav_seek_origin_start)) {+ drwav_uint64 riffChunkSize = drwav__riff_chunk_size_rf64(pWav->dataChunkDataSize, pWav->pMetadata, pWav->metadataCount);
+ drwav__write_u64ne_to_le(pWav, riffChunkSize);
+ }
+
+ /* The "data" chunk size. */
+ if (pWav->onSeek(pWav->pUserData, ds64BodyPos + 8, drwav_seek_origin_start)) {+ drwav_uint64 dataChunkSize = drwav__data_chunk_size_rf64(pWav->dataChunkDataSize);
+ drwav__write_u64ne_to_le(pWav, dataChunkSize);
+ }
+ }
+ }
+
+ /* Validation for sequential mode. */
+ if (pWav->isSequentialWrite) {+ if (pWav->dataChunkDataSize != pWav->dataChunkDataSizeTargetWrite) {+ result = DRWAV_INVALID_FILE;
+ }
+ }
+ } else {+ if (pWav->pMetadata != NULL) {+ pWav->allocationCallbacks.onFree(pWav->pMetadata, pWav->allocationCallbacks.pUserData);
+ }
+ }
+
+#ifndef DR_WAV_NO_STDIO
+ /*
+ If we opened the file with drwav_open_file() we will want to close the file handle. We can know whether or not drwav_open_file()
+ was used by looking at the onRead and onSeek callbacks.
+ */
+ if (pWav->onRead == drwav__on_read_stdio || pWav->onWrite == drwav__on_write_stdio) {+ fclose((FILE*)pWav->pUserData);
+ }
+#endif
+
+ return result;
+}
+
+
+
+DRWAV_API size_t drwav_read_raw(drwav* pWav, size_t bytesToRead, void* pBufferOut)
+{+ size_t bytesRead;
+ drwav_uint32 bytesPerFrame;
+
+ if (pWav == NULL || bytesToRead == 0) {+ return 0; /* Invalid args. */
+ }
+
+ if (bytesToRead > pWav->bytesRemaining) {+ bytesToRead = (size_t)pWav->bytesRemaining;
+ }
+
+ if (bytesToRead == 0) {+ return 0; /* At end. */
+ }
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0; /* Could not determine the bytes per frame. */
+ }
+
+ if (pBufferOut != NULL) {+ bytesRead = pWav->onRead(pWav->pUserData, pBufferOut, bytesToRead);
+ } else {+ /* We need to seek. If we fail, we need to read-and-discard to make sure we get a good byte count. */
+ bytesRead = 0;
+ while (bytesRead < bytesToRead) {+ size_t bytesToSeek = (bytesToRead - bytesRead);
+ if (bytesToSeek > 0x7FFFFFFF) {+ bytesToSeek = 0x7FFFFFFF;
+ }
+
+ if (pWav->onSeek(pWav->pUserData, (int)bytesToSeek, drwav_seek_origin_current) == DRWAV_FALSE) {+ break;
+ }
+
+ bytesRead += bytesToSeek;
+ }
+
+ /* When we get here we may need to read-and-discard some data. */
+ while (bytesRead < bytesToRead) {+ drwav_uint8 buffer[4096];
+ size_t bytesSeeked;
+ size_t bytesToSeek = (bytesToRead - bytesRead);
+ if (bytesToSeek > sizeof(buffer)) {+ bytesToSeek = sizeof(buffer);
+ }
+
+ bytesSeeked = pWav->onRead(pWav->pUserData, buffer, bytesToSeek);
+ bytesRead += bytesSeeked;
+
+ if (bytesSeeked < bytesToSeek) {+ break; /* Reached the end. */
+ }
+ }
+ }
+
+ pWav->readCursorInPCMFrames += bytesRead / bytesPerFrame;
+
+ pWav->bytesRemaining -= bytesRead;
+ return bytesRead;
+}
+
+
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_le(drwav* pWav, drwav_uint64 framesToRead, void* pBufferOut)
+{+ drwav_uint32 bytesPerFrame;
+ drwav_uint64 bytesToRead; /* Intentionally uint64 instead of size_t so we can do a check that we're not reading too much on 32-bit builds. */
+
+ if (pWav == NULL || framesToRead == 0) {+ return 0;
+ }
+
+ /* Cannot use this function for compressed formats. */
+ if (drwav__is_compressed_format_tag(pWav->translatedFormatTag)) {+ return 0;
+ }
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ /* Don't try to read more samples than can potentially fit in the output buffer. */
+ bytesToRead = framesToRead * bytesPerFrame;
+ if (bytesToRead > DRWAV_SIZE_MAX) {+ bytesToRead = (DRWAV_SIZE_MAX / bytesPerFrame) * bytesPerFrame; /* Round the number of bytes to read to a clean frame boundary. */
+ }
+
+ /*
+ Doing an explicit check here just to make it clear that we don't want to be attempt to read anything if there's no bytes to read. There
+ *could* be a time where it evaluates to 0 due to overflowing.
+ */
+ if (bytesToRead == 0) {+ return 0;
+ }
+
+ return drwav_read_raw(pWav, (size_t)bytesToRead, pBufferOut) / bytesPerFrame;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_be(drwav* pWav, drwav_uint64 framesToRead, void* pBufferOut)
+{+ drwav_uint64 framesRead = drwav_read_pcm_frames_le(pWav, framesToRead, pBufferOut);
+
+ if (pBufferOut != NULL) {+ drwav_uint32 bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0; /* Could not get the bytes per frame which means bytes per sample cannot be determined and we don't know how to byte swap. */
+ }
+
+ drwav__bswap_samples(pBufferOut, framesRead*pWav->channels, bytesPerFrame/pWav->channels, pWav->translatedFormatTag);
+ }
+
+ return framesRead;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames(drwav* pWav, drwav_uint64 framesToRead, void* pBufferOut)
+{+ if (drwav__is_little_endian()) {+ return drwav_read_pcm_frames_le(pWav, framesToRead, pBufferOut);
+ } else {+ return drwav_read_pcm_frames_be(pWav, framesToRead, pBufferOut);
+ }
+}
+
+
+
+DRWAV_PRIVATE drwav_bool32 drwav_seek_to_first_pcm_frame(drwav* pWav)
+{+ if (pWav->onWrite != NULL) {+ return DRWAV_FALSE; /* No seeking in write mode. */
+ }
+
+ if (!pWav->onSeek(pWav->pUserData, (int)pWav->dataChunkDataPos, drwav_seek_origin_start)) {+ return DRWAV_FALSE;
+ }
+
+ if (drwav__is_compressed_format_tag(pWav->translatedFormatTag)) {+ /* Cached data needs to be cleared for compressed formats. */
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM) {+ DRWAV_ZERO_OBJECT(&pWav->msadpcm);
+ } else if (pWav->translatedFormatTag == DR_WAVE_FORMAT_DVI_ADPCM) {+ DRWAV_ZERO_OBJECT(&pWav->ima);
+ } else {+ DRWAV_ASSERT(DRWAV_FALSE); /* If this assertion is triggered it means I've implemented a new compressed format but forgot to add a branch for it here. */
+ }
+ }
+
+ pWav->readCursorInPCMFrames = 0;
+ pWav->bytesRemaining = pWav->dataChunkDataSize;
+
+ return DRWAV_TRUE;
+}
+
+DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
+{+ /* Seeking should be compatible with wave files > 2GB. */
+
+ if (pWav == NULL || pWav->onSeek == NULL) {+ return DRWAV_FALSE;
+ }
+
+ /* No seeking in write mode. */
+ if (pWav->onWrite != NULL) {+ return DRWAV_FALSE;
+ }
+
+ /* If there are no samples, just return DRWAV_TRUE without doing anything. */
+ if (pWav->totalPCMFrameCount == 0) {+ return DRWAV_TRUE;
+ }
+
+ /* Make sure the sample is clamped. */
+ if (targetFrameIndex > pWav->totalPCMFrameCount) {+ targetFrameIndex = pWav->totalPCMFrameCount;
+ }
+
+ /*
+ For compressed formats we just use a slow generic seek. If we are seeking forward we just seek forward. If we are going backwards we need
+ to seek back to the start.
+ */
+ if (drwav__is_compressed_format_tag(pWav->translatedFormatTag)) {+ /* TODO: This can be optimized. */
+
+ /*
+ If we're seeking forward it's simple - just keep reading samples until we hit the sample we're requesting. If we're seeking backwards,
+ we first need to seek back to the start and then just do the same thing as a forward seek.
+ */
+ if (targetFrameIndex < pWav->readCursorInPCMFrames) {+ if (!drwav_seek_to_first_pcm_frame(pWav)) {+ return DRWAV_FALSE;
+ }
+ }
+
+ if (targetFrameIndex > pWav->readCursorInPCMFrames) {+ drwav_uint64 offsetInFrames = targetFrameIndex - pWav->readCursorInPCMFrames;
+
+ drwav_int16 devnull[2048];
+ while (offsetInFrames > 0) {+ drwav_uint64 framesRead = 0;
+ drwav_uint64 framesToRead = offsetInFrames;
+ if (framesToRead > drwav_countof(devnull)/pWav->channels) {+ framesToRead = drwav_countof(devnull)/pWav->channels;
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM) {+ framesRead = drwav_read_pcm_frames_s16__msadpcm(pWav, framesToRead, devnull);
+ } else if (pWav->translatedFormatTag == DR_WAVE_FORMAT_DVI_ADPCM) {+ framesRead = drwav_read_pcm_frames_s16__ima(pWav, framesToRead, devnull);
+ } else {+ DRWAV_ASSERT(DRWAV_FALSE); /* If this assertion is triggered it means I've implemented a new compressed format but forgot to add a branch for it here. */
+ }
+
+ if (framesRead != framesToRead) {+ return DRWAV_FALSE;
+ }
+
+ offsetInFrames -= framesRead;
+ }
+ }
+ } else {+ drwav_uint64 totalSizeInBytes;
+ drwav_uint64 currentBytePos;
+ drwav_uint64 targetBytePos;
+ drwav_uint64 offset;
+ drwav_uint32 bytesPerFrame;
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return DRWAV_FALSE; /* Not able to calculate offset. */
+ }
+
+ totalSizeInBytes = pWav->totalPCMFrameCount * bytesPerFrame;
+ DRWAV_ASSERT(totalSizeInBytes >= pWav->bytesRemaining);
+
+ currentBytePos = totalSizeInBytes - pWav->bytesRemaining;
+ targetBytePos = targetFrameIndex * bytesPerFrame;
+
+ if (currentBytePos < targetBytePos) {+ /* Offset forwards. */
+ offset = (targetBytePos - currentBytePos);
+ } else {+ /* Offset backwards. */
+ if (!drwav_seek_to_first_pcm_frame(pWav)) {+ return DRWAV_FALSE;
+ }
+ offset = targetBytePos;
+ }
+
+ while (offset > 0) {+ int offset32 = ((offset > INT_MAX) ? INT_MAX : (int)offset);
+ if (!pWav->onSeek(pWav->pUserData, offset32, drwav_seek_origin_current)) {+ return DRWAV_FALSE;
+ }
+
+ pWav->readCursorInPCMFrames += offset32 / bytesPerFrame;
+ pWav->bytesRemaining -= offset32;
+ offset -= offset32;
+ }
+ }
+
+ return DRWAV_TRUE;
+}
+
+DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
+{+ if (pCursor == NULL) {+ return DRWAV_INVALID_ARGS;
+ }
+
+ *pCursor = 0; /* Safety. */
+
+ if (pWav == NULL) {+ return DRWAV_INVALID_ARGS;
+ }
+
+ *pCursor = pWav->readCursorInPCMFrames;
+
+ return DRWAV_SUCCESS;
+}
+
+DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
+{+ if (pLength == NULL) {+ return DRWAV_INVALID_ARGS;
+ }
+
+ *pLength = 0; /* Safety. */
+
+ if (pWav == NULL) {+ return DRWAV_INVALID_ARGS;
+ }
+
+ *pLength = pWav->totalPCMFrameCount;
+
+ return DRWAV_SUCCESS;
+}
+
+
+DRWAV_API size_t drwav_write_raw(drwav* pWav, size_t bytesToWrite, const void* pData)
+{+ size_t bytesWritten;
+
+ if (pWav == NULL || bytesToWrite == 0 || pData == NULL) {+ return 0;
+ }
+
+ bytesWritten = pWav->onWrite(pWav->pUserData, pData, bytesToWrite);
+ pWav->dataChunkDataSize += bytesWritten;
+
+ return bytesWritten;
+}
+
+DRWAV_API drwav_uint64 drwav_write_pcm_frames_le(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
+{+ drwav_uint64 bytesToWrite;
+ drwav_uint64 bytesWritten;
+ const drwav_uint8* pRunningData;
+
+ if (pWav == NULL || framesToWrite == 0 || pData == NULL) {+ return 0;
+ }
+
+ bytesToWrite = ((framesToWrite * pWav->channels * pWav->bitsPerSample) / 8);
+ if (bytesToWrite > DRWAV_SIZE_MAX) {+ return 0;
+ }
+
+ bytesWritten = 0;
+ pRunningData = (const drwav_uint8*)pData;
+
+ while (bytesToWrite > 0) {+ size_t bytesJustWritten;
+ drwav_uint64 bytesToWriteThisIteration;
+
+ bytesToWriteThisIteration = bytesToWrite;
+ DRWAV_ASSERT(bytesToWriteThisIteration <= DRWAV_SIZE_MAX); /* <-- This is checked above. */
+
+ bytesJustWritten = drwav_write_raw(pWav, (size_t)bytesToWriteThisIteration, pRunningData);
+ if (bytesJustWritten == 0) {+ break;
+ }
+
+ bytesToWrite -= bytesJustWritten;
+ bytesWritten += bytesJustWritten;
+ pRunningData += bytesJustWritten;
+ }
+
+ return (bytesWritten * 8) / pWav->bitsPerSample / pWav->channels;
+}
+
+DRWAV_API drwav_uint64 drwav_write_pcm_frames_be(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
+{+ drwav_uint64 bytesToWrite;
+ drwav_uint64 bytesWritten;
+ drwav_uint32 bytesPerSample;
+ const drwav_uint8* pRunningData;
+
+ if (pWav == NULL || framesToWrite == 0 || pData == NULL) {+ return 0;
+ }
+
+ bytesToWrite = ((framesToWrite * pWav->channels * pWav->bitsPerSample) / 8);
+ if (bytesToWrite > DRWAV_SIZE_MAX) {+ return 0;
+ }
+
+ bytesWritten = 0;
+ pRunningData = (const drwav_uint8*)pData;
+
+ bytesPerSample = drwav_get_bytes_per_pcm_frame(pWav) / pWav->channels;
+ if (bytesPerSample == 0) {+ return 0; /* Cannot determine bytes per sample, or bytes per sample is less than one byte. */
+ }
+
+ while (bytesToWrite > 0) {+ drwav_uint8 temp[4096];
+ drwav_uint32 sampleCount;
+ size_t bytesJustWritten;
+ drwav_uint64 bytesToWriteThisIteration;
+
+ bytesToWriteThisIteration = bytesToWrite;
+ DRWAV_ASSERT(bytesToWriteThisIteration <= DRWAV_SIZE_MAX); /* <-- This is checked above. */
+
+ /*
+ WAV files are always little-endian. We need to byte swap on big-endian architectures. Since our input buffer is read-only we need
+ to use an intermediary buffer for the conversion.
+ */
+ sampleCount = sizeof(temp)/bytesPerSample;
+
+ if (bytesToWriteThisIteration > ((drwav_uint64)sampleCount)*bytesPerSample) {+ bytesToWriteThisIteration = ((drwav_uint64)sampleCount)*bytesPerSample;
+ }
+
+ DRWAV_COPY_MEMORY(temp, pRunningData, (size_t)bytesToWriteThisIteration);
+ drwav__bswap_samples(temp, sampleCount, bytesPerSample, pWav->translatedFormatTag);
+
+ bytesJustWritten = drwav_write_raw(pWav, (size_t)bytesToWriteThisIteration, temp);
+ if (bytesJustWritten == 0) {+ break;
+ }
+
+ bytesToWrite -= bytesJustWritten;
+ bytesWritten += bytesJustWritten;
+ pRunningData += bytesJustWritten;
+ }
+
+ return (bytesWritten * 8) / pWav->bitsPerSample / pWav->channels;
+}
+
+DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
+{+ if (drwav__is_little_endian()) {+ return drwav_write_pcm_frames_le(pWav, framesToWrite, pData);
+ } else {+ return drwav_write_pcm_frames_be(pWav, framesToWrite, pData);
+ }
+}
+
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s16__msadpcm(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
+{+ drwav_uint64 totalFramesRead = 0;
+
+ DRWAV_ASSERT(pWav != NULL);
+ DRWAV_ASSERT(framesToRead > 0);
+
+ /* TODO: Lots of room for optimization here. */
+
+ while (pWav->readCursorInPCMFrames < pWav->totalPCMFrameCount) {+ DRWAV_ASSERT(framesToRead > 0); /* This loop iteration will never get hit with framesToRead == 0 because it's asserted at the top, and we check for 0 inside the loop just below. */
+
+ /* If there are no cached frames we need to load a new block. */
+ if (pWav->msadpcm.cachedFrameCount == 0 && pWav->msadpcm.bytesRemainingInBlock == 0) {+ if (pWav->channels == 1) {+ /* Mono. */
+ drwav_uint8 header[7];
+ if (pWav->onRead(pWav->pUserData, header, sizeof(header)) != sizeof(header)) {+ return totalFramesRead;
+ }
+ pWav->msadpcm.bytesRemainingInBlock = pWav->fmt.blockAlign - sizeof(header);
+
+ pWav->msadpcm.predictor[0] = header[0];
+ pWav->msadpcm.delta[0] = drwav_bytes_to_s16(header + 1);
+ pWav->msadpcm.prevFrames[0][1] = (drwav_int32)drwav_bytes_to_s16(header + 3);
+ pWav->msadpcm.prevFrames[0][0] = (drwav_int32)drwav_bytes_to_s16(header + 5);
+ pWav->msadpcm.cachedFrames[2] = pWav->msadpcm.prevFrames[0][0];
+ pWav->msadpcm.cachedFrames[3] = pWav->msadpcm.prevFrames[0][1];
+ pWav->msadpcm.cachedFrameCount = 2;
+ } else {+ /* Stereo. */
+ drwav_uint8 header[14];
+ if (pWav->onRead(pWav->pUserData, header, sizeof(header)) != sizeof(header)) {+ return totalFramesRead;
+ }
+ pWav->msadpcm.bytesRemainingInBlock = pWav->fmt.blockAlign - sizeof(header);
+
+ pWav->msadpcm.predictor[0] = header[0];
+ pWav->msadpcm.predictor[1] = header[1];
+ pWav->msadpcm.delta[0] = drwav_bytes_to_s16(header + 2);
+ pWav->msadpcm.delta[1] = drwav_bytes_to_s16(header + 4);
+ pWav->msadpcm.prevFrames[0][1] = (drwav_int32)drwav_bytes_to_s16(header + 6);
+ pWav->msadpcm.prevFrames[1][1] = (drwav_int32)drwav_bytes_to_s16(header + 8);
+ pWav->msadpcm.prevFrames[0][0] = (drwav_int32)drwav_bytes_to_s16(header + 10);
+ pWav->msadpcm.prevFrames[1][0] = (drwav_int32)drwav_bytes_to_s16(header + 12);
+
+ pWav->msadpcm.cachedFrames[0] = pWav->msadpcm.prevFrames[0][0];
+ pWav->msadpcm.cachedFrames[1] = pWav->msadpcm.prevFrames[1][0];
+ pWav->msadpcm.cachedFrames[2] = pWav->msadpcm.prevFrames[0][1];
+ pWav->msadpcm.cachedFrames[3] = pWav->msadpcm.prevFrames[1][1];
+ pWav->msadpcm.cachedFrameCount = 2;
+ }
+ }
+
+ /* Output anything that's cached. */
+ while (framesToRead > 0 && pWav->msadpcm.cachedFrameCount > 0 && pWav->readCursorInPCMFrames < pWav->totalPCMFrameCount) {+ if (pBufferOut != NULL) {+ drwav_uint32 iSample = 0;
+ for (iSample = 0; iSample < pWav->channels; iSample += 1) {+ pBufferOut[iSample] = (drwav_int16)pWav->msadpcm.cachedFrames[(drwav_countof(pWav->msadpcm.cachedFrames) - (pWav->msadpcm.cachedFrameCount*pWav->channels)) + iSample];
+ }
+
+ pBufferOut += pWav->channels;
+ }
+
+ framesToRead -= 1;
+ totalFramesRead += 1;
+ pWav->readCursorInPCMFrames += 1;
+ pWav->msadpcm.cachedFrameCount -= 1;
+ }
+
+ if (framesToRead == 0) {+ break;
+ }
+
+
+ /*
+ If there's nothing left in the cache, just go ahead and load more. If there's nothing left to load in the current block we just continue to the next
+ loop iteration which will trigger the loading of a new block.
+ */
+ if (pWav->msadpcm.cachedFrameCount == 0) {+ if (pWav->msadpcm.bytesRemainingInBlock == 0) {+ continue;
+ } else {+ static drwav_int32 adaptationTable[] = {+ 230, 230, 230, 230, 307, 409, 512, 614,
+ 768, 614, 512, 409, 307, 230, 230, 230
+ };
+ static drwav_int32 coeff1Table[] = { 256, 512, 0, 192, 240, 460, 392 };+ static drwav_int32 coeff2Table[] = { 0, -256, 0, 64, 0, -208, -232 };+
+ drwav_uint8 nibbles;
+ drwav_int32 nibble0;
+ drwav_int32 nibble1;
+
+ if (pWav->onRead(pWav->pUserData, &nibbles, 1) != 1) {+ return totalFramesRead;
+ }
+ pWav->msadpcm.bytesRemainingInBlock -= 1;
+
+ /* TODO: Optimize away these if statements. */
+ nibble0 = ((nibbles & 0xF0) >> 4); if ((nibbles & 0x80)) { nibble0 |= 0xFFFFFFF0UL; }+ nibble1 = ((nibbles & 0x0F) >> 0); if ((nibbles & 0x08)) { nibble1 |= 0xFFFFFFF0UL; }+
+ if (pWav->channels == 1) {+ /* Mono. */
+ drwav_int32 newSample0;
+ drwav_int32 newSample1;
+
+ newSample0 = ((pWav->msadpcm.prevFrames[0][1] * coeff1Table[pWav->msadpcm.predictor[0]]) + (pWav->msadpcm.prevFrames[0][0] * coeff2Table[pWav->msadpcm.predictor[0]])) >> 8;
+ newSample0 += nibble0 * pWav->msadpcm.delta[0];
+ newSample0 = drwav_clamp(newSample0, -32768, 32767);
+
+ pWav->msadpcm.delta[0] = (adaptationTable[((nibbles & 0xF0) >> 4)] * pWav->msadpcm.delta[0]) >> 8;
+ if (pWav->msadpcm.delta[0] < 16) {+ pWav->msadpcm.delta[0] = 16;
+ }
+
+ pWav->msadpcm.prevFrames[0][0] = pWav->msadpcm.prevFrames[0][1];
+ pWav->msadpcm.prevFrames[0][1] = newSample0;
+
+
+ newSample1 = ((pWav->msadpcm.prevFrames[0][1] * coeff1Table[pWav->msadpcm.predictor[0]]) + (pWav->msadpcm.prevFrames[0][0] * coeff2Table[pWav->msadpcm.predictor[0]])) >> 8;
+ newSample1 += nibble1 * pWav->msadpcm.delta[0];
+ newSample1 = drwav_clamp(newSample1, -32768, 32767);
+
+ pWav->msadpcm.delta[0] = (adaptationTable[((nibbles & 0x0F) >> 0)] * pWav->msadpcm.delta[0]) >> 8;
+ if (pWav->msadpcm.delta[0] < 16) {+ pWav->msadpcm.delta[0] = 16;
+ }
+
+ pWav->msadpcm.prevFrames[0][0] = pWav->msadpcm.prevFrames[0][1];
+ pWav->msadpcm.prevFrames[0][1] = newSample1;
+
+
+ pWav->msadpcm.cachedFrames[2] = newSample0;
+ pWav->msadpcm.cachedFrames[3] = newSample1;
+ pWav->msadpcm.cachedFrameCount = 2;
+ } else {+ /* Stereo. */
+ drwav_int32 newSample0;
+ drwav_int32 newSample1;
+
+ /* Left. */
+ newSample0 = ((pWav->msadpcm.prevFrames[0][1] * coeff1Table[pWav->msadpcm.predictor[0]]) + (pWav->msadpcm.prevFrames[0][0] * coeff2Table[pWav->msadpcm.predictor[0]])) >> 8;
+ newSample0 += nibble0 * pWav->msadpcm.delta[0];
+ newSample0 = drwav_clamp(newSample0, -32768, 32767);
+
+ pWav->msadpcm.delta[0] = (adaptationTable[((nibbles & 0xF0) >> 4)] * pWav->msadpcm.delta[0]) >> 8;
+ if (pWav->msadpcm.delta[0] < 16) {+ pWav->msadpcm.delta[0] = 16;
+ }
+
+ pWav->msadpcm.prevFrames[0][0] = pWav->msadpcm.prevFrames[0][1];
+ pWav->msadpcm.prevFrames[0][1] = newSample0;
+
+
+ /* Right. */
+ newSample1 = ((pWav->msadpcm.prevFrames[1][1] * coeff1Table[pWav->msadpcm.predictor[1]]) + (pWav->msadpcm.prevFrames[1][0] * coeff2Table[pWav->msadpcm.predictor[1]])) >> 8;
+ newSample1 += nibble1 * pWav->msadpcm.delta[1];
+ newSample1 = drwav_clamp(newSample1, -32768, 32767);
+
+ pWav->msadpcm.delta[1] = (adaptationTable[((nibbles & 0x0F) >> 0)] * pWav->msadpcm.delta[1]) >> 8;
+ if (pWav->msadpcm.delta[1] < 16) {+ pWav->msadpcm.delta[1] = 16;
+ }
+
+ pWav->msadpcm.prevFrames[1][0] = pWav->msadpcm.prevFrames[1][1];
+ pWav->msadpcm.prevFrames[1][1] = newSample1;
+
+ pWav->msadpcm.cachedFrames[2] = newSample0;
+ pWav->msadpcm.cachedFrames[3] = newSample1;
+ pWav->msadpcm.cachedFrameCount = 1;
+ }
+ }
+ }
+ }
+
+ return totalFramesRead;
+}
+
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s16__ima(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
+{+ drwav_uint64 totalFramesRead = 0;
+ drwav_uint32 iChannel;
+
+ static drwav_int32 indexTable[16] = {+ -1, -1, -1, -1, 2, 4, 6, 8,
+ -1, -1, -1, -1, 2, 4, 6, 8
+ };
+
+ static drwav_int32 stepTable[89] = {+ 7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
+ 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
+ 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
+ 130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
+ 337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
+ 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
+ 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
+ 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
+ 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
+ };
+
+ DRWAV_ASSERT(pWav != NULL);
+ DRWAV_ASSERT(framesToRead > 0);
+
+ /* TODO: Lots of room for optimization here. */
+
+ while (pWav->readCursorInPCMFrames < pWav->totalPCMFrameCount) {+ DRWAV_ASSERT(framesToRead > 0); /* This loop iteration will never get hit with framesToRead == 0 because it's asserted at the top, and we check for 0 inside the loop just below. */
+
+ /* If there are no cached samples we need to load a new block. */
+ if (pWav->ima.cachedFrameCount == 0 && pWav->ima.bytesRemainingInBlock == 0) {+ if (pWav->channels == 1) {+ /* Mono. */
+ drwav_uint8 header[4];
+ if (pWav->onRead(pWav->pUserData, header, sizeof(header)) != sizeof(header)) {+ return totalFramesRead;
+ }
+ pWav->ima.bytesRemainingInBlock = pWav->fmt.blockAlign - sizeof(header);
+
+ if (header[2] >= drwav_countof(stepTable)) {+ pWav->onSeek(pWav->pUserData, pWav->ima.bytesRemainingInBlock, drwav_seek_origin_current);
+ pWav->ima.bytesRemainingInBlock = 0;
+ return totalFramesRead; /* Invalid data. */
+ }
+
+ pWav->ima.predictor[0] = drwav_bytes_to_s16(header + 0);
+ pWav->ima.stepIndex[0] = drwav_clamp(header[2], 0, (drwav_int32)drwav_countof(stepTable)-1); /* Clamp not necessary because we checked above, but adding here to silence a static analysis warning. */
+ pWav->ima.cachedFrames[drwav_countof(pWav->ima.cachedFrames) - 1] = pWav->ima.predictor[0];
+ pWav->ima.cachedFrameCount = 1;
+ } else {+ /* Stereo. */
+ drwav_uint8 header[8];
+ if (pWav->onRead(pWav->pUserData, header, sizeof(header)) != sizeof(header)) {+ return totalFramesRead;
+ }
+ pWav->ima.bytesRemainingInBlock = pWav->fmt.blockAlign - sizeof(header);
+
+ if (header[2] >= drwav_countof(stepTable) || header[6] >= drwav_countof(stepTable)) {+ pWav->onSeek(pWav->pUserData, pWav->ima.bytesRemainingInBlock, drwav_seek_origin_current);
+ pWav->ima.bytesRemainingInBlock = 0;
+ return totalFramesRead; /* Invalid data. */
+ }
+
+ pWav->ima.predictor[0] = drwav_bytes_to_s16(header + 0);
+ pWav->ima.stepIndex[0] = drwav_clamp(header[2], 0, (drwav_int32)drwav_countof(stepTable)-1); /* Clamp not necessary because we checked above, but adding here to silence a static analysis warning. */
+ pWav->ima.predictor[1] = drwav_bytes_to_s16(header + 4);
+ pWav->ima.stepIndex[1] = drwav_clamp(header[6], 0, (drwav_int32)drwav_countof(stepTable)-1); /* Clamp not necessary because we checked above, but adding here to silence a static analysis warning. */
+
+ pWav->ima.cachedFrames[drwav_countof(pWav->ima.cachedFrames) - 2] = pWav->ima.predictor[0];
+ pWav->ima.cachedFrames[drwav_countof(pWav->ima.cachedFrames) - 1] = pWav->ima.predictor[1];
+ pWav->ima.cachedFrameCount = 1;
+ }
+ }
+
+ /* Output anything that's cached. */
+ while (framesToRead > 0 && pWav->ima.cachedFrameCount > 0 && pWav->readCursorInPCMFrames < pWav->totalPCMFrameCount) {+ if (pBufferOut != NULL) {+ drwav_uint32 iSample;
+ for (iSample = 0; iSample < pWav->channels; iSample += 1) {+ pBufferOut[iSample] = (drwav_int16)pWav->ima.cachedFrames[(drwav_countof(pWav->ima.cachedFrames) - (pWav->ima.cachedFrameCount*pWav->channels)) + iSample];
+ }
+ pBufferOut += pWav->channels;
+ }
+
+ framesToRead -= 1;
+ totalFramesRead += 1;
+ pWav->readCursorInPCMFrames += 1;
+ pWav->ima.cachedFrameCount -= 1;
+ }
+
+ if (framesToRead == 0) {+ break;
+ }
+
+ /*
+ If there's nothing left in the cache, just go ahead and load more. If there's nothing left to load in the current block we just continue to the next
+ loop iteration which will trigger the loading of a new block.
+ */
+ if (pWav->ima.cachedFrameCount == 0) {+ if (pWav->ima.bytesRemainingInBlock == 0) {+ continue;
+ } else {+ /*
+ From what I can tell with stereo streams, it looks like every 4 bytes (8 samples) is for one channel. So it goes 4 bytes for the
+ left channel, 4 bytes for the right channel.
+ */
+ pWav->ima.cachedFrameCount = 8;
+ for (iChannel = 0; iChannel < pWav->channels; ++iChannel) {+ drwav_uint32 iByte;
+ drwav_uint8 nibbles[4];
+ if (pWav->onRead(pWav->pUserData, &nibbles, 4) != 4) {+ pWav->ima.cachedFrameCount = 0;
+ return totalFramesRead;
+ }
+ pWav->ima.bytesRemainingInBlock -= 4;
+
+ for (iByte = 0; iByte < 4; ++iByte) {+ drwav_uint8 nibble0 = ((nibbles[iByte] & 0x0F) >> 0);
+ drwav_uint8 nibble1 = ((nibbles[iByte] & 0xF0) >> 4);
+
+ drwav_int32 step = stepTable[pWav->ima.stepIndex[iChannel]];
+ drwav_int32 predictor = pWav->ima.predictor[iChannel];
+
+ drwav_int32 diff = step >> 3;
+ if (nibble0 & 1) diff += step >> 2;
+ if (nibble0 & 2) diff += step >> 1;
+ if (nibble0 & 4) diff += step;
+ if (nibble0 & 8) diff = -diff;
+
+ predictor = drwav_clamp(predictor + diff, -32768, 32767);
+ pWav->ima.predictor[iChannel] = predictor;
+ pWav->ima.stepIndex[iChannel] = drwav_clamp(pWav->ima.stepIndex[iChannel] + indexTable[nibble0], 0, (drwav_int32)drwav_countof(stepTable)-1);
+ pWav->ima.cachedFrames[(drwav_countof(pWav->ima.cachedFrames) - (pWav->ima.cachedFrameCount*pWav->channels)) + (iByte*2+0)*pWav->channels + iChannel] = predictor;
+
+
+ step = stepTable[pWav->ima.stepIndex[iChannel]];
+ predictor = pWav->ima.predictor[iChannel];
+
+ diff = step >> 3;
+ if (nibble1 & 1) diff += step >> 2;
+ if (nibble1 & 2) diff += step >> 1;
+ if (nibble1 & 4) diff += step;
+ if (nibble1 & 8) diff = -diff;
+
+ predictor = drwav_clamp(predictor + diff, -32768, 32767);
+ pWav->ima.predictor[iChannel] = predictor;
+ pWav->ima.stepIndex[iChannel] = drwav_clamp(pWav->ima.stepIndex[iChannel] + indexTable[nibble1], 0, (drwav_int32)drwav_countof(stepTable)-1);
+ pWav->ima.cachedFrames[(drwav_countof(pWav->ima.cachedFrames) - (pWav->ima.cachedFrameCount*pWav->channels)) + (iByte*2+1)*pWav->channels + iChannel] = predictor;
+ }
+ }
+ }
+ }
+ }
+
+ return totalFramesRead;
+}
+
+
+#ifndef DR_WAV_NO_CONVERSION_API
+static unsigned short g_drwavAlawTable[256] = {+ 0xEA80, 0xEB80, 0xE880, 0xE980, 0xEE80, 0xEF80, 0xEC80, 0xED80, 0xE280, 0xE380, 0xE080, 0xE180, 0xE680, 0xE780, 0xE480, 0xE580,
+ 0xF540, 0xF5C0, 0xF440, 0xF4C0, 0xF740, 0xF7C0, 0xF640, 0xF6C0, 0xF140, 0xF1C0, 0xF040, 0xF0C0, 0xF340, 0xF3C0, 0xF240, 0xF2C0,
+ 0xAA00, 0xAE00, 0xA200, 0xA600, 0xBA00, 0xBE00, 0xB200, 0xB600, 0x8A00, 0x8E00, 0x8200, 0x8600, 0x9A00, 0x9E00, 0x9200, 0x9600,
+ 0xD500, 0xD700, 0xD100, 0xD300, 0xDD00, 0xDF00, 0xD900, 0xDB00, 0xC500, 0xC700, 0xC100, 0xC300, 0xCD00, 0xCF00, 0xC900, 0xCB00,
+ 0xFEA8, 0xFEB8, 0xFE88, 0xFE98, 0xFEE8, 0xFEF8, 0xFEC8, 0xFED8, 0xFE28, 0xFE38, 0xFE08, 0xFE18, 0xFE68, 0xFE78, 0xFE48, 0xFE58,
+ 0xFFA8, 0xFFB8, 0xFF88, 0xFF98, 0xFFE8, 0xFFF8, 0xFFC8, 0xFFD8, 0xFF28, 0xFF38, 0xFF08, 0xFF18, 0xFF68, 0xFF78, 0xFF48, 0xFF58,
+ 0xFAA0, 0xFAE0, 0xFA20, 0xFA60, 0xFBA0, 0xFBE0, 0xFB20, 0xFB60, 0xF8A0, 0xF8E0, 0xF820, 0xF860, 0xF9A0, 0xF9E0, 0xF920, 0xF960,
+ 0xFD50, 0xFD70, 0xFD10, 0xFD30, 0xFDD0, 0xFDF0, 0xFD90, 0xFDB0, 0xFC50, 0xFC70, 0xFC10, 0xFC30, 0xFCD0, 0xFCF0, 0xFC90, 0xFCB0,
+ 0x1580, 0x1480, 0x1780, 0x1680, 0x1180, 0x1080, 0x1380, 0x1280, 0x1D80, 0x1C80, 0x1F80, 0x1E80, 0x1980, 0x1880, 0x1B80, 0x1A80,
+ 0x0AC0, 0x0A40, 0x0BC0, 0x0B40, 0x08C0, 0x0840, 0x09C0, 0x0940, 0x0EC0, 0x0E40, 0x0FC0, 0x0F40, 0x0CC0, 0x0C40, 0x0DC0, 0x0D40,
+ 0x5600, 0x5200, 0x5E00, 0x5A00, 0x4600, 0x4200, 0x4E00, 0x4A00, 0x7600, 0x7200, 0x7E00, 0x7A00, 0x6600, 0x6200, 0x6E00, 0x6A00,
+ 0x2B00, 0x2900, 0x2F00, 0x2D00, 0x2300, 0x2100, 0x2700, 0x2500, 0x3B00, 0x3900, 0x3F00, 0x3D00, 0x3300, 0x3100, 0x3700, 0x3500,
+ 0x0158, 0x0148, 0x0178, 0x0168, 0x0118, 0x0108, 0x0138, 0x0128, 0x01D8, 0x01C8, 0x01F8, 0x01E8, 0x0198, 0x0188, 0x01B8, 0x01A8,
+ 0x0058, 0x0048, 0x0078, 0x0068, 0x0018, 0x0008, 0x0038, 0x0028, 0x00D8, 0x00C8, 0x00F8, 0x00E8, 0x0098, 0x0088, 0x00B8, 0x00A8,
+ 0x0560, 0x0520, 0x05E0, 0x05A0, 0x0460, 0x0420, 0x04E0, 0x04A0, 0x0760, 0x0720, 0x07E0, 0x07A0, 0x0660, 0x0620, 0x06E0, 0x06A0,
+ 0x02B0, 0x0290, 0x02F0, 0x02D0, 0x0230, 0x0210, 0x0270, 0x0250, 0x03B0, 0x0390, 0x03F0, 0x03D0, 0x0330, 0x0310, 0x0370, 0x0350
+};
+
+static unsigned short g_drwavMulawTable[256] = {+ 0x8284, 0x8684, 0x8A84, 0x8E84, 0x9284, 0x9684, 0x9A84, 0x9E84, 0xA284, 0xA684, 0xAA84, 0xAE84, 0xB284, 0xB684, 0xBA84, 0xBE84,
+ 0xC184, 0xC384, 0xC584, 0xC784, 0xC984, 0xCB84, 0xCD84, 0xCF84, 0xD184, 0xD384, 0xD584, 0xD784, 0xD984, 0xDB84, 0xDD84, 0xDF84,
+ 0xE104, 0xE204, 0xE304, 0xE404, 0xE504, 0xE604, 0xE704, 0xE804, 0xE904, 0xEA04, 0xEB04, 0xEC04, 0xED04, 0xEE04, 0xEF04, 0xF004,
+ 0xF0C4, 0xF144, 0xF1C4, 0xF244, 0xF2C4, 0xF344, 0xF3C4, 0xF444, 0xF4C4, 0xF544, 0xF5C4, 0xF644, 0xF6C4, 0xF744, 0xF7C4, 0xF844,
+ 0xF8A4, 0xF8E4, 0xF924, 0xF964, 0xF9A4, 0xF9E4, 0xFA24, 0xFA64, 0xFAA4, 0xFAE4, 0xFB24, 0xFB64, 0xFBA4, 0xFBE4, 0xFC24, 0xFC64,
+ 0xFC94, 0xFCB4, 0xFCD4, 0xFCF4, 0xFD14, 0xFD34, 0xFD54, 0xFD74, 0xFD94, 0xFDB4, 0xFDD4, 0xFDF4, 0xFE14, 0xFE34, 0xFE54, 0xFE74,
+ 0xFE8C, 0xFE9C, 0xFEAC, 0xFEBC, 0xFECC, 0xFEDC, 0xFEEC, 0xFEFC, 0xFF0C, 0xFF1C, 0xFF2C, 0xFF3C, 0xFF4C, 0xFF5C, 0xFF6C, 0xFF7C,
+ 0xFF88, 0xFF90, 0xFF98, 0xFFA0, 0xFFA8, 0xFFB0, 0xFFB8, 0xFFC0, 0xFFC8, 0xFFD0, 0xFFD8, 0xFFE0, 0xFFE8, 0xFFF0, 0xFFF8, 0x0000,
+ 0x7D7C, 0x797C, 0x757C, 0x717C, 0x6D7C, 0x697C, 0x657C, 0x617C, 0x5D7C, 0x597C, 0x557C, 0x517C, 0x4D7C, 0x497C, 0x457C, 0x417C,
+ 0x3E7C, 0x3C7C, 0x3A7C, 0x387C, 0x367C, 0x347C, 0x327C, 0x307C, 0x2E7C, 0x2C7C, 0x2A7C, 0x287C, 0x267C, 0x247C, 0x227C, 0x207C,
+ 0x1EFC, 0x1DFC, 0x1CFC, 0x1BFC, 0x1AFC, 0x19FC, 0x18FC, 0x17FC, 0x16FC, 0x15FC, 0x14FC, 0x13FC, 0x12FC, 0x11FC, 0x10FC, 0x0FFC,
+ 0x0F3C, 0x0EBC, 0x0E3C, 0x0DBC, 0x0D3C, 0x0CBC, 0x0C3C, 0x0BBC, 0x0B3C, 0x0ABC, 0x0A3C, 0x09BC, 0x093C, 0x08BC, 0x083C, 0x07BC,
+ 0x075C, 0x071C, 0x06DC, 0x069C, 0x065C, 0x061C, 0x05DC, 0x059C, 0x055C, 0x051C, 0x04DC, 0x049C, 0x045C, 0x041C, 0x03DC, 0x039C,
+ 0x036C, 0x034C, 0x032C, 0x030C, 0x02EC, 0x02CC, 0x02AC, 0x028C, 0x026C, 0x024C, 0x022C, 0x020C, 0x01EC, 0x01CC, 0x01AC, 0x018C,
+ 0x0174, 0x0164, 0x0154, 0x0144, 0x0134, 0x0124, 0x0114, 0x0104, 0x00F4, 0x00E4, 0x00D4, 0x00C4, 0x00B4, 0x00A4, 0x0094, 0x0084,
+ 0x0078, 0x0070, 0x0068, 0x0060, 0x0058, 0x0050, 0x0048, 0x0040, 0x0038, 0x0030, 0x0028, 0x0020, 0x0018, 0x0010, 0x0008, 0x0000
+};
+
+static DRWAV_INLINE drwav_int16 drwav__alaw_to_s16(drwav_uint8 sampleIn)
+{+ return (short)g_drwavAlawTable[sampleIn];
+}
+
+static DRWAV_INLINE drwav_int16 drwav__mulaw_to_s16(drwav_uint8 sampleIn)
+{+ return (short)g_drwavMulawTable[sampleIn];
+}
+
+
+
+DRWAV_PRIVATE void drwav__pcm_to_s16(drwav_int16* pOut, const drwav_uint8* pIn, size_t totalSampleCount, unsigned int bytesPerSample)
+{+ size_t i;
+
+ /* Special case for 8-bit sample data because it's treated as unsigned. */
+ if (bytesPerSample == 1) {+ drwav_u8_to_s16(pOut, pIn, totalSampleCount);
+ return;
+ }
+
+
+ /* Slightly more optimal implementation for common formats. */
+ if (bytesPerSample == 2) {+ for (i = 0; i < totalSampleCount; ++i) {+ *pOut++ = ((const drwav_int16*)pIn)[i];
+ }
+ return;
+ }
+ if (bytesPerSample == 3) {+ drwav_s24_to_s16(pOut, pIn, totalSampleCount);
+ return;
+ }
+ if (bytesPerSample == 4) {+ drwav_s32_to_s16(pOut, (const drwav_int32*)pIn, totalSampleCount);
+ return;
+ }
+
+
+ /* Anything more than 64 bits per sample is not supported. */
+ if (bytesPerSample > 8) {+ DRWAV_ZERO_MEMORY(pOut, totalSampleCount * sizeof(*pOut));
+ return;
+ }
+
+
+ /* Generic, slow converter. */
+ for (i = 0; i < totalSampleCount; ++i) {+ drwav_uint64 sample = 0;
+ unsigned int shift = (8 - bytesPerSample) * 8;
+
+ unsigned int j;
+ for (j = 0; j < bytesPerSample; j += 1) {+ DRWAV_ASSERT(j < 8);
+ sample |= (drwav_uint64)(pIn[j]) << shift;
+ shift += 8;
+ }
+
+ pIn += j;
+ *pOut++ = (drwav_int16)((drwav_int64)sample >> 48);
+ }
+}
+
+DRWAV_PRIVATE void drwav__ieee_to_s16(drwav_int16* pOut, const drwav_uint8* pIn, size_t totalSampleCount, unsigned int bytesPerSample)
+{+ if (bytesPerSample == 4) {+ drwav_f32_to_s16(pOut, (const float*)pIn, totalSampleCount);
+ return;
+ } else if (bytesPerSample == 8) {+ drwav_f64_to_s16(pOut, (const double*)pIn, totalSampleCount);
+ return;
+ } else {+ /* Only supporting 32- and 64-bit float. Output silence in all other cases. Contributions welcome for 16-bit float. */
+ DRWAV_ZERO_MEMORY(pOut, totalSampleCount * sizeof(*pOut));
+ return;
+ }
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s16__pcm(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ /* Fast path. */
+ if ((pWav->translatedFormatTag == DR_WAVE_FORMAT_PCM && pWav->bitsPerSample == 16) || pBufferOut == NULL) {+ return drwav_read_pcm_frames(pWav, framesToRead, pBufferOut);
+ }
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav__pcm_to_s16(pBufferOut, sampleData, (size_t)samplesRead, bytesPerSample);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s16__ieee(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ if (pBufferOut == NULL) {+ return drwav_read_pcm_frames(pWav, framesToRead, NULL);
+ }
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav__ieee_to_s16(pBufferOut, sampleData, (size_t)samplesRead, bytesPerSample); /* Safe cast. */
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s16__alaw(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ if (pBufferOut == NULL) {+ return drwav_read_pcm_frames(pWav, framesToRead, NULL);
+ }
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav_alaw_to_s16(pBufferOut, sampleData, (size_t)samplesRead);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s16__mulaw(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ if (pBufferOut == NULL) {+ return drwav_read_pcm_frames(pWav, framesToRead, NULL);
+ }
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav_mulaw_to_s16(pBufferOut, sampleData, (size_t)samplesRead);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
+{+ if (pWav == NULL || framesToRead == 0) {+ return 0;
+ }
+
+ if (pBufferOut == NULL) {+ return drwav_read_pcm_frames(pWav, framesToRead, NULL);
+ }
+
+ /* Don't try to read more samples than can potentially fit in the output buffer. */
+ if (framesToRead * pWav->channels * sizeof(drwav_int16) > DRWAV_SIZE_MAX) {+ framesToRead = DRWAV_SIZE_MAX / sizeof(drwav_int16) / pWav->channels;
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_PCM) {+ return drwav_read_pcm_frames_s16__pcm(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_IEEE_FLOAT) {+ return drwav_read_pcm_frames_s16__ieee(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ALAW) {+ return drwav_read_pcm_frames_s16__alaw(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_MULAW) {+ return drwav_read_pcm_frames_s16__mulaw(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM) {+ return drwav_read_pcm_frames_s16__msadpcm(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_DVI_ADPCM) {+ return drwav_read_pcm_frames_s16__ima(pWav, framesToRead, pBufferOut);
+ }
+
+ return 0;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
+{+ drwav_uint64 framesRead = drwav_read_pcm_frames_s16(pWav, framesToRead, pBufferOut);
+ if (pBufferOut != NULL && drwav__is_little_endian() == DRWAV_FALSE) {+ drwav__bswap_samples_s16(pBufferOut, framesRead*pWav->channels);
+ }
+
+ return framesRead;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
+{+ drwav_uint64 framesRead = drwav_read_pcm_frames_s16(pWav, framesToRead, pBufferOut);
+ if (pBufferOut != NULL && drwav__is_little_endian() == DRWAV_TRUE) {+ drwav__bswap_samples_s16(pBufferOut, framesRead*pWav->channels);
+ }
+
+ return framesRead;
+}
+
+
+DRWAV_API void drwav_u8_to_s16(drwav_int16* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ int r;
+ size_t i;
+ for (i = 0; i < sampleCount; ++i) {+ int x = pIn[i];
+ r = x << 8;
+ r = r - 32768;
+ pOut[i] = (short)r;
+ }
+}
+
+DRWAV_API void drwav_s24_to_s16(drwav_int16* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ int r;
+ size_t i;
+ for (i = 0; i < sampleCount; ++i) {+ int x = ((int)(((unsigned int)(((const drwav_uint8*)pIn)[i*3+0]) << 8) | ((unsigned int)(((const drwav_uint8*)pIn)[i*3+1]) << 16) | ((unsigned int)(((const drwav_uint8*)pIn)[i*3+2])) << 24)) >> 8;
+ r = x >> 8;
+ pOut[i] = (short)r;
+ }
+}
+
+DRWAV_API void drwav_s32_to_s16(drwav_int16* pOut, const drwav_int32* pIn, size_t sampleCount)
+{+ int r;
+ size_t i;
+ for (i = 0; i < sampleCount; ++i) {+ int x = pIn[i];
+ r = x >> 16;
+ pOut[i] = (short)r;
+ }
+}
+
+DRWAV_API void drwav_f32_to_s16(drwav_int16* pOut, const float* pIn, size_t sampleCount)
+{+ int r;
+ size_t i;
+ for (i = 0; i < sampleCount; ++i) {+ float x = pIn[i];
+ float c;
+ c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
+ c = c + 1;
+ r = (int)(c * 32767.5f);
+ r = r - 32768;
+ pOut[i] = (short)r;
+ }
+}
+
+DRWAV_API void drwav_f64_to_s16(drwav_int16* pOut, const double* pIn, size_t sampleCount)
+{+ int r;
+ size_t i;
+ for (i = 0; i < sampleCount; ++i) {+ double x = pIn[i];
+ double c;
+ c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
+ c = c + 1;
+ r = (int)(c * 32767.5);
+ r = r - 32768;
+ pOut[i] = (short)r;
+ }
+}
+
+DRWAV_API void drwav_alaw_to_s16(drwav_int16* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ size_t i;
+ for (i = 0; i < sampleCount; ++i) {+ pOut[i] = drwav__alaw_to_s16(pIn[i]);
+ }
+}
+
+DRWAV_API void drwav_mulaw_to_s16(drwav_int16* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ size_t i;
+ for (i = 0; i < sampleCount; ++i) {+ pOut[i] = drwav__mulaw_to_s16(pIn[i]);
+ }
+}
+
+
+
+DRWAV_PRIVATE void drwav__pcm_to_f32(float* pOut, const drwav_uint8* pIn, size_t sampleCount, unsigned int bytesPerSample)
+{+ unsigned int i;
+
+ /* Special case for 8-bit sample data because it's treated as unsigned. */
+ if (bytesPerSample == 1) {+ drwav_u8_to_f32(pOut, pIn, sampleCount);
+ return;
+ }
+
+ /* Slightly more optimal implementation for common formats. */
+ if (bytesPerSample == 2) {+ drwav_s16_to_f32(pOut, (const drwav_int16*)pIn, sampleCount);
+ return;
+ }
+ if (bytesPerSample == 3) {+ drwav_s24_to_f32(pOut, pIn, sampleCount);
+ return;
+ }
+ if (bytesPerSample == 4) {+ drwav_s32_to_f32(pOut, (const drwav_int32*)pIn, sampleCount);
+ return;
+ }
+
+
+ /* Anything more than 64 bits per sample is not supported. */
+ if (bytesPerSample > 8) {+ DRWAV_ZERO_MEMORY(pOut, sampleCount * sizeof(*pOut));
+ return;
+ }
+
+
+ /* Generic, slow converter. */
+ for (i = 0; i < sampleCount; ++i) {+ drwav_uint64 sample = 0;
+ unsigned int shift = (8 - bytesPerSample) * 8;
+
+ unsigned int j;
+ for (j = 0; j < bytesPerSample; j += 1) {+ DRWAV_ASSERT(j < 8);
+ sample |= (drwav_uint64)(pIn[j]) << shift;
+ shift += 8;
+ }
+
+ pIn += j;
+ *pOut++ = (float)((drwav_int64)sample / 9223372036854775807.0);
+ }
+}
+
+DRWAV_PRIVATE void drwav__ieee_to_f32(float* pOut, const drwav_uint8* pIn, size_t sampleCount, unsigned int bytesPerSample)
+{+ if (bytesPerSample == 4) {+ unsigned int i;
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = ((const float*)pIn)[i];
+ }
+ return;
+ } else if (bytesPerSample == 8) {+ drwav_f64_to_f32(pOut, (const double*)pIn, sampleCount);
+ return;
+ } else {+ /* Only supporting 32- and 64-bit float. Output silence in all other cases. Contributions welcome for 16-bit float. */
+ DRWAV_ZERO_MEMORY(pOut, sampleCount * sizeof(*pOut));
+ return;
+ }
+}
+
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_f32__pcm(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav__pcm_to_f32(pBufferOut, sampleData, (size_t)samplesRead, bytesPerSample);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_f32__msadpcm_ima(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
+{+ /*
+ We're just going to borrow the implementation from the drwav_read_s16() since ADPCM is a little bit more complicated than other formats and I don't
+ want to duplicate that code.
+ */
+ drwav_uint64 totalFramesRead;
+ drwav_int16 samples16[2048];
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, drwav_countof(samples16)/pWav->channels);
+ drwav_uint64 framesRead = drwav_read_pcm_frames_s16(pWav, framesToReadThisIteration, samples16);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ drwav_s16_to_f32(pBufferOut, samples16, (size_t)(framesRead*pWav->channels)); /* <-- Safe cast because we're clamping to 2048. */
+
+ pBufferOut += framesRead*pWav->channels;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_f32__ieee(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ /* Fast path. */
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_IEEE_FLOAT && pWav->bitsPerSample == 32) {+ return drwav_read_pcm_frames(pWav, framesToRead, pBufferOut);
+ }
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav__ieee_to_f32(pBufferOut, sampleData, (size_t)samplesRead, bytesPerSample);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_f32__alaw(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav_alaw_to_f32(pBufferOut, sampleData, (size_t)samplesRead);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_f32__mulaw(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav_mulaw_to_f32(pBufferOut, sampleData, (size_t)samplesRead);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
+{+ if (pWav == NULL || framesToRead == 0) {+ return 0;
+ }
+
+ if (pBufferOut == NULL) {+ return drwav_read_pcm_frames(pWav, framesToRead, NULL);
+ }
+
+ /* Don't try to read more samples than can potentially fit in the output buffer. */
+ if (framesToRead * pWav->channels * sizeof(float) > DRWAV_SIZE_MAX) {+ framesToRead = DRWAV_SIZE_MAX / sizeof(float) / pWav->channels;
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_PCM) {+ return drwav_read_pcm_frames_f32__pcm(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM || pWav->translatedFormatTag == DR_WAVE_FORMAT_DVI_ADPCM) {+ return drwav_read_pcm_frames_f32__msadpcm_ima(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_IEEE_FLOAT) {+ return drwav_read_pcm_frames_f32__ieee(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ALAW) {+ return drwav_read_pcm_frames_f32__alaw(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_MULAW) {+ return drwav_read_pcm_frames_f32__mulaw(pWav, framesToRead, pBufferOut);
+ }
+
+ return 0;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
+{+ drwav_uint64 framesRead = drwav_read_pcm_frames_f32(pWav, framesToRead, pBufferOut);
+ if (pBufferOut != NULL && drwav__is_little_endian() == DRWAV_FALSE) {+ drwav__bswap_samples_f32(pBufferOut, framesRead*pWav->channels);
+ }
+
+ return framesRead;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
+{+ drwav_uint64 framesRead = drwav_read_pcm_frames_f32(pWav, framesToRead, pBufferOut);
+ if (pBufferOut != NULL && drwav__is_little_endian() == DRWAV_TRUE) {+ drwav__bswap_samples_f32(pBufferOut, framesRead*pWav->channels);
+ }
+
+ return framesRead;
+}
+
+
+DRWAV_API void drwav_u8_to_f32(float* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+#ifdef DR_WAV_LIBSNDFILE_COMPAT
+ /*
+ It appears libsndfile uses slightly different logic for the u8 -> f32 conversion to dr_wav, which in my opinion is incorrect. It appears
+ libsndfile performs the conversion something like "f32 = (u8 / 256) * 2 - 1", however I think it should be "f32 = (u8 / 255) * 2 - 1" (note
+ the divisor of 256 vs 255). I use libsndfile as a benchmark for testing, so I'm therefore leaving this block here just for my automated
+ correctness testing. This is disabled by default.
+ */
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = (pIn[i] / 256.0f) * 2 - 1;
+ }
+#else
+ for (i = 0; i < sampleCount; ++i) {+ float x = pIn[i];
+ x = x * 0.00784313725490196078f; /* 0..255 to 0..2 */
+ x = x - 1; /* 0..2 to -1..1 */
+
+ *pOut++ = x;
+ }
+#endif
+}
+
+DRWAV_API void drwav_s16_to_f32(float* pOut, const drwav_int16* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = pIn[i] * 0.000030517578125f;
+ }
+}
+
+DRWAV_API void drwav_s24_to_f32(float* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ double x;
+ drwav_uint32 a = ((drwav_uint32)(pIn[i*3+0]) << 8);
+ drwav_uint32 b = ((drwav_uint32)(pIn[i*3+1]) << 16);
+ drwav_uint32 c = ((drwav_uint32)(pIn[i*3+2]) << 24);
+
+ x = (double)((drwav_int32)(a | b | c) >> 8);
+ *pOut++ = (float)(x * 0.00000011920928955078125);
+ }
+}
+
+DRWAV_API void drwav_s32_to_f32(float* pOut, const drwav_int32* pIn, size_t sampleCount)
+{+ size_t i;
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = (float)(pIn[i] / 2147483648.0);
+ }
+}
+
+DRWAV_API void drwav_f64_to_f32(float* pOut, const double* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = (float)pIn[i];
+ }
+}
+
+DRWAV_API void drwav_alaw_to_f32(float* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = drwav__alaw_to_s16(pIn[i]) / 32768.0f;
+ }
+}
+
+DRWAV_API void drwav_mulaw_to_f32(float* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = drwav__mulaw_to_s16(pIn[i]) / 32768.0f;
+ }
+}
+
+
+
+DRWAV_PRIVATE void drwav__pcm_to_s32(drwav_int32* pOut, const drwav_uint8* pIn, size_t totalSampleCount, unsigned int bytesPerSample)
+{+ unsigned int i;
+
+ /* Special case for 8-bit sample data because it's treated as unsigned. */
+ if (bytesPerSample == 1) {+ drwav_u8_to_s32(pOut, pIn, totalSampleCount);
+ return;
+ }
+
+ /* Slightly more optimal implementation for common formats. */
+ if (bytesPerSample == 2) {+ drwav_s16_to_s32(pOut, (const drwav_int16*)pIn, totalSampleCount);
+ return;
+ }
+ if (bytesPerSample == 3) {+ drwav_s24_to_s32(pOut, pIn, totalSampleCount);
+ return;
+ }
+ if (bytesPerSample == 4) {+ for (i = 0; i < totalSampleCount; ++i) {+ *pOut++ = ((const drwav_int32*)pIn)[i];
+ }
+ return;
+ }
+
+
+ /* Anything more than 64 bits per sample is not supported. */
+ if (bytesPerSample > 8) {+ DRWAV_ZERO_MEMORY(pOut, totalSampleCount * sizeof(*pOut));
+ return;
+ }
+
+
+ /* Generic, slow converter. */
+ for (i = 0; i < totalSampleCount; ++i) {+ drwav_uint64 sample = 0;
+ unsigned int shift = (8 - bytesPerSample) * 8;
+
+ unsigned int j;
+ for (j = 0; j < bytesPerSample; j += 1) {+ DRWAV_ASSERT(j < 8);
+ sample |= (drwav_uint64)(pIn[j]) << shift;
+ shift += 8;
+ }
+
+ pIn += j;
+ *pOut++ = (drwav_int32)((drwav_int64)sample >> 32);
+ }
+}
+
+DRWAV_PRIVATE void drwav__ieee_to_s32(drwav_int32* pOut, const drwav_uint8* pIn, size_t totalSampleCount, unsigned int bytesPerSample)
+{+ if (bytesPerSample == 4) {+ drwav_f32_to_s32(pOut, (const float*)pIn, totalSampleCount);
+ return;
+ } else if (bytesPerSample == 8) {+ drwav_f64_to_s32(pOut, (const double*)pIn, totalSampleCount);
+ return;
+ } else {+ /* Only supporting 32- and 64-bit float. Output silence in all other cases. Contributions welcome for 16-bit float. */
+ DRWAV_ZERO_MEMORY(pOut, totalSampleCount * sizeof(*pOut));
+ return;
+ }
+}
+
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s32__pcm(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ /* Fast path. */
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_PCM && pWav->bitsPerSample == 32) {+ return drwav_read_pcm_frames(pWav, framesToRead, pBufferOut);
+ }
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav__pcm_to_s32(pBufferOut, sampleData, (size_t)samplesRead, bytesPerSample);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s32__msadpcm_ima(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
+{+ /*
+ We're just going to borrow the implementation from the drwav_read_s16() since ADPCM is a little bit more complicated than other formats and I don't
+ want to duplicate that code.
+ */
+ drwav_uint64 totalFramesRead = 0;
+ drwav_int16 samples16[2048];
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, drwav_countof(samples16)/pWav->channels);
+ drwav_uint64 framesRead = drwav_read_pcm_frames_s16(pWav, framesToReadThisIteration, samples16);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ drwav_s16_to_s32(pBufferOut, samples16, (size_t)(framesRead*pWav->channels)); /* <-- Safe cast because we're clamping to 2048. */
+
+ pBufferOut += framesRead*pWav->channels;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s32__ieee(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav__ieee_to_s32(pBufferOut, sampleData, (size_t)samplesRead, bytesPerSample);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s32__alaw(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav_alaw_to_s32(pBufferOut, sampleData, (size_t)samplesRead);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_PRIVATE drwav_uint64 drwav_read_pcm_frames_s32__mulaw(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
+{+ drwav_uint64 totalFramesRead;
+ drwav_uint8 sampleData[4096] = {0};+ drwav_uint32 bytesPerFrame;
+ drwav_uint32 bytesPerSample;
+ drwav_uint64 samplesRead;
+
+ bytesPerFrame = drwav_get_bytes_per_pcm_frame(pWav);
+ if (bytesPerFrame == 0) {+ return 0;
+ }
+
+ bytesPerSample = bytesPerFrame / pWav->channels;
+ if (bytesPerSample == 0 || (bytesPerFrame % pWav->channels) != 0) {+ return 0; /* Only byte-aligned formats are supported. */
+ }
+
+ totalFramesRead = 0;
+
+ while (framesToRead > 0) {+ drwav_uint64 framesToReadThisIteration = drwav_min(framesToRead, sizeof(sampleData)/bytesPerFrame);
+ drwav_uint64 framesRead = drwav_read_pcm_frames(pWav, framesToReadThisIteration, sampleData);
+ if (framesRead == 0) {+ break;
+ }
+
+ DRWAV_ASSERT(framesRead <= framesToReadThisIteration); /* If this fails it means there's a bug in drwav_read_pcm_frames(). */
+
+ /* Validation to ensure we don't read too much from out intermediary buffer. This is to protect from invalid files. */
+ samplesRead = framesRead * pWav->channels;
+ if ((samplesRead * bytesPerSample) > sizeof(sampleData)) {+ DRWAV_ASSERT(DRWAV_FALSE); /* This should never happen with a valid file. */
+ break;
+ }
+
+ drwav_mulaw_to_s32(pBufferOut, sampleData, (size_t)samplesRead);
+
+ pBufferOut += samplesRead;
+ framesToRead -= framesRead;
+ totalFramesRead += framesRead;
+ }
+
+ return totalFramesRead;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
+{+ if (pWav == NULL || framesToRead == 0) {+ return 0;
+ }
+
+ if (pBufferOut == NULL) {+ return drwav_read_pcm_frames(pWav, framesToRead, NULL);
+ }
+
+ /* Don't try to read more samples than can potentially fit in the output buffer. */
+ if (framesToRead * pWav->channels * sizeof(drwav_int32) > DRWAV_SIZE_MAX) {+ framesToRead = DRWAV_SIZE_MAX / sizeof(drwav_int32) / pWav->channels;
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_PCM) {+ return drwav_read_pcm_frames_s32__pcm(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM || pWav->translatedFormatTag == DR_WAVE_FORMAT_DVI_ADPCM) {+ return drwav_read_pcm_frames_s32__msadpcm_ima(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_IEEE_FLOAT) {+ return drwav_read_pcm_frames_s32__ieee(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ALAW) {+ return drwav_read_pcm_frames_s32__alaw(pWav, framesToRead, pBufferOut);
+ }
+
+ if (pWav->translatedFormatTag == DR_WAVE_FORMAT_MULAW) {+ return drwav_read_pcm_frames_s32__mulaw(pWav, framesToRead, pBufferOut);
+ }
+
+ return 0;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
+{+ drwav_uint64 framesRead = drwav_read_pcm_frames_s32(pWav, framesToRead, pBufferOut);
+ if (pBufferOut != NULL && drwav__is_little_endian() == DRWAV_FALSE) {+ drwav__bswap_samples_s32(pBufferOut, framesRead*pWav->channels);
+ }
+
+ return framesRead;
+}
+
+DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
+{+ drwav_uint64 framesRead = drwav_read_pcm_frames_s32(pWav, framesToRead, pBufferOut);
+ if (pBufferOut != NULL && drwav__is_little_endian() == DRWAV_TRUE) {+ drwav__bswap_samples_s32(pBufferOut, framesRead*pWav->channels);
+ }
+
+ return framesRead;
+}
+
+
+DRWAV_API void drwav_u8_to_s32(drwav_int32* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = ((int)pIn[i] - 128) << 24;
+ }
+}
+
+DRWAV_API void drwav_s16_to_s32(drwav_int32* pOut, const drwav_int16* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = pIn[i] << 16;
+ }
+}
+
+DRWAV_API void drwav_s24_to_s32(drwav_int32* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ unsigned int s0 = pIn[i*3 + 0];
+ unsigned int s1 = pIn[i*3 + 1];
+ unsigned int s2 = pIn[i*3 + 2];
+
+ drwav_int32 sample32 = (drwav_int32)((s0 << 8) | (s1 << 16) | (s2 << 24));
+ *pOut++ = sample32;
+ }
+}
+
+DRWAV_API void drwav_f32_to_s32(drwav_int32* pOut, const float* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = (drwav_int32)(2147483648.0 * pIn[i]);
+ }
+}
+
+DRWAV_API void drwav_f64_to_s32(drwav_int32* pOut, const double* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = (drwav_int32)(2147483648.0 * pIn[i]);
+ }
+}
+
+DRWAV_API void drwav_alaw_to_s32(drwav_int32* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i = 0; i < sampleCount; ++i) {+ *pOut++ = ((drwav_int32)drwav__alaw_to_s16(pIn[i])) << 16;
+ }
+}
+
+DRWAV_API void drwav_mulaw_to_s32(drwav_int32* pOut, const drwav_uint8* pIn, size_t sampleCount)
+{+ size_t i;
+
+ if (pOut == NULL || pIn == NULL) {+ return;
+ }
+
+ for (i= 0; i < sampleCount; ++i) {+ *pOut++ = ((drwav_int32)drwav__mulaw_to_s16(pIn[i])) << 16;
+ }
+}
+
+
+
+DRWAV_PRIVATE drwav_int16* drwav__read_pcm_frames_and_close_s16(drwav* pWav, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalFrameCount)
+{+ drwav_uint64 sampleDataSize;
+ drwav_int16* pSampleData;
+ drwav_uint64 framesRead;
+
+ DRWAV_ASSERT(pWav != NULL);
+
+ sampleDataSize = pWav->totalPCMFrameCount * pWav->channels * sizeof(drwav_int16);
+ if (sampleDataSize > DRWAV_SIZE_MAX) {+ drwav_uninit(pWav);
+ return NULL; /* File's too big. */
+ }
+
+ pSampleData = (drwav_int16*)drwav__malloc_from_callbacks((size_t)sampleDataSize, &pWav->allocationCallbacks); /* <-- Safe cast due to the check above. */
+ if (pSampleData == NULL) {+ drwav_uninit(pWav);
+ return NULL; /* Failed to allocate memory. */
+ }
+
+ framesRead = drwav_read_pcm_frames_s16(pWav, (size_t)pWav->totalPCMFrameCount, pSampleData);
+ if (framesRead != pWav->totalPCMFrameCount) {+ drwav__free_from_callbacks(pSampleData, &pWav->allocationCallbacks);
+ drwav_uninit(pWav);
+ return NULL; /* There was an error reading the samples. */
+ }
+
+ drwav_uninit(pWav);
+
+ if (sampleRate) {+ *sampleRate = pWav->sampleRate;
+ }
+ if (channels) {+ *channels = pWav->channels;
+ }
+ if (totalFrameCount) {+ *totalFrameCount = pWav->totalPCMFrameCount;
+ }
+
+ return pSampleData;
+}
+
+DRWAV_PRIVATE float* drwav__read_pcm_frames_and_close_f32(drwav* pWav, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalFrameCount)
+{+ drwav_uint64 sampleDataSize;
+ float* pSampleData;
+ drwav_uint64 framesRead;
+
+ DRWAV_ASSERT(pWav != NULL);
+
+ sampleDataSize = pWav->totalPCMFrameCount * pWav->channels * sizeof(float);
+ if (sampleDataSize > DRWAV_SIZE_MAX) {+ drwav_uninit(pWav);
+ return NULL; /* File's too big. */
+ }
+
+ pSampleData = (float*)drwav__malloc_from_callbacks((size_t)sampleDataSize, &pWav->allocationCallbacks); /* <-- Safe cast due to the check above. */
+ if (pSampleData == NULL) {+ drwav_uninit(pWav);
+ return NULL; /* Failed to allocate memory. */
+ }
+
+ framesRead = drwav_read_pcm_frames_f32(pWav, (size_t)pWav->totalPCMFrameCount, pSampleData);
+ if (framesRead != pWav->totalPCMFrameCount) {+ drwav__free_from_callbacks(pSampleData, &pWav->allocationCallbacks);
+ drwav_uninit(pWav);
+ return NULL; /* There was an error reading the samples. */
+ }
+
+ drwav_uninit(pWav);
+
+ if (sampleRate) {+ *sampleRate = pWav->sampleRate;
+ }
+ if (channels) {+ *channels = pWav->channels;
+ }
+ if (totalFrameCount) {+ *totalFrameCount = pWav->totalPCMFrameCount;
+ }
+
+ return pSampleData;
+}
+
+DRWAV_PRIVATE drwav_int32* drwav__read_pcm_frames_and_close_s32(drwav* pWav, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalFrameCount)
+{+ drwav_uint64 sampleDataSize;
+ drwav_int32* pSampleData;
+ drwav_uint64 framesRead;
+
+ DRWAV_ASSERT(pWav != NULL);
+
+ sampleDataSize = pWav->totalPCMFrameCount * pWav->channels * sizeof(drwav_int32);
+ if (sampleDataSize > DRWAV_SIZE_MAX) {+ drwav_uninit(pWav);
+ return NULL; /* File's too big. */
+ }
+
+ pSampleData = (drwav_int32*)drwav__malloc_from_callbacks((size_t)sampleDataSize, &pWav->allocationCallbacks); /* <-- Safe cast due to the check above. */
+ if (pSampleData == NULL) {+ drwav_uninit(pWav);
+ return NULL; /* Failed to allocate memory. */
+ }
+
+ framesRead = drwav_read_pcm_frames_s32(pWav, (size_t)pWav->totalPCMFrameCount, pSampleData);
+ if (framesRead != pWav->totalPCMFrameCount) {+ drwav__free_from_callbacks(pSampleData, &pWav->allocationCallbacks);
+ drwav_uninit(pWav);
+ return NULL; /* There was an error reading the samples. */
+ }
+
+ drwav_uninit(pWav);
+
+ if (sampleRate) {+ *sampleRate = pWav->sampleRate;
+ }
+ if (channels) {+ *channels = pWav->channels;
+ }
+ if (totalFrameCount) {+ *totalFrameCount = pWav->totalPCMFrameCount;
+ }
+
+ return pSampleData;
+}
+
+
+
+DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init(&wav, onRead, onSeek, pUserData, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_s16(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+
+DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init(&wav, onRead, onSeek, pUserData, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_f32(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+
+DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init(&wav, onRead, onSeek, pUserData, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_s32(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+
+#ifndef DR_WAV_NO_STDIO
+DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init_file(&wav, filename, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_s16(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+
+DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init_file(&wav, filename, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_f32(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+
+DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init_file(&wav, filename, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_s32(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+
+
+#ifndef DR_WAV_NO_WCHAR
+DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init_file_w(&wav, filename, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_s16(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+
+DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init_file_w(&wav, filename, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_f32(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+
+DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init_file_w(&wav, filename, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_s32(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+#endif /* DR_WAV_NO_WCHAR */
+#endif /* DR_WAV_NO_STDIO */
+
+DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init_memory(&wav, data, dataSize, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_s16(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+
+DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init_memory(&wav, data, dataSize, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_f32(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+
+DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ drwav wav;
+
+ if (channelsOut) {+ *channelsOut = 0;
+ }
+ if (sampleRateOut) {+ *sampleRateOut = 0;
+ }
+ if (totalFrameCountOut) {+ *totalFrameCountOut = 0;
+ }
+
+ if (!drwav_init_memory(&wav, data, dataSize, pAllocationCallbacks)) {+ return NULL;
+ }
+
+ return drwav__read_pcm_frames_and_close_s32(&wav, channelsOut, sampleRateOut, totalFrameCountOut);
+}
+#endif /* DR_WAV_NO_CONVERSION_API */
+
+
+DRWAV_API void drwav_free(void* p, const drwav_allocation_callbacks* pAllocationCallbacks)
+{+ if (pAllocationCallbacks != NULL) {+ drwav__free_from_callbacks(p, pAllocationCallbacks);
+ } else {+ drwav__free_default(p, NULL);
+ }
+}
+
+DRWAV_API drwav_uint16 drwav_bytes_to_u16(const drwav_uint8* data)
+{+ return ((drwav_uint16)data[0] << 0) | ((drwav_uint16)data[1] << 8);
+}
+
+DRWAV_API drwav_int16 drwav_bytes_to_s16(const drwav_uint8* data)
+{+ return (drwav_int16)drwav_bytes_to_u16(data);
+}
+
+DRWAV_API drwav_uint32 drwav_bytes_to_u32(const drwav_uint8* data)
+{+ return ((drwav_uint32)data[0] << 0) | ((drwav_uint32)data[1] << 8) | ((drwav_uint32)data[2] << 16) | ((drwav_uint32)data[3] << 24);
+}
+
+DRWAV_API float drwav_bytes_to_f32(const drwav_uint8* data)
+{+ union {+ drwav_uint32 u32;
+ float f32;
+ } value;
+
+ value.u32 = drwav_bytes_to_u32(data);
+ return value.f32;
+}
+
+DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
+{+ return (drwav_int32)drwav_bytes_to_u32(data);
+}
+
+DRWAV_API drwav_uint64 drwav_bytes_to_u64(const drwav_uint8* data)
+{+ return
+ ((drwav_uint64)data[0] << 0) | ((drwav_uint64)data[1] << 8) | ((drwav_uint64)data[2] << 16) | ((drwav_uint64)data[3] << 24) |
+ ((drwav_uint64)data[4] << 32) | ((drwav_uint64)data[5] << 40) | ((drwav_uint64)data[6] << 48) | ((drwav_uint64)data[7] << 56);
+}
+
+DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
+{+ return (drwav_int64)drwav_bytes_to_u64(data);
+}
+
+
+DRWAV_API drwav_bool32 drwav_guid_equal(const drwav_uint8 a[16], const drwav_uint8 b[16])
+{+ int i;
+ for (i = 0; i < 16; i += 1) {+ if (a[i] != b[i]) {+ return DRWAV_FALSE;
+ }
+ }
+
+ return DRWAV_TRUE;
+}
+
+DRWAV_API drwav_bool32 drwav_fourcc_equal(const drwav_uint8* a, const char* b)
+{+ return
+ a[0] == b[0] &&
+ a[1] == b[1] &&
+ a[2] == b[2] &&
+ a[3] == b[3];
+}
+
+#ifdef __MRC__
+/* Undo the pragma at the beginning of this file. */
+#pragma options opt reset
+#endif
+
+#endif /* dr_wav_c */
+#endif /* DR_WAV_IMPLEMENTATION */
+
+/*
+REVISION HISTORY
+================
+v0.13.7 - 2022-09-17
+ - Fix compilation with DJGPP.
+ - Add support for disabling wchar_t with DR_WAV_NO_WCHAR.
+
+v0.13.6 - 2022-04-10
+ - Fix compilation error on older versions of GCC.
+ - Remove some dependencies on the standard library.
+
+v0.13.5 - 2022-01-26
+ - Fix an error when seeking to the end of the file.
+
+v0.13.4 - 2021-12-08
+ - Fix some static analysis warnings.
+
+v0.13.3 - 2021-11-24
+ - Fix an incorrect assertion when trying to endian swap 1-byte sample formats. This is now a no-op
+ rather than a failed assertion.
+ - Fix a bug with parsing of the bext chunk.
+ - Fix some static analysis warnings.
+
+v0.13.2 - 2021-10-02
+ - Fix a possible buffer overflow when reading from compressed formats.
+
+v0.13.1 - 2021-07-31
+ - Fix platform detection for ARM64.
+
+v0.13.0 - 2021-07-01
+ - Improve support for reading and writing metadata. Use the `_with_metadata()` APIs to initialize
+ a WAV decoder and store the metadata within the `drwav` object. Use the `pMetadata` and
+ `metadataCount` members of the `drwav` object to read the data. The old way of handling metadata
+ via a callback is still usable and valid.
+ - API CHANGE: drwav_target_write_size_bytes() now takes extra parameters for calculating the
+ required write size when writing metadata.
+ - Add drwav_get_cursor_in_pcm_frames()
+ - Add drwav_get_length_in_pcm_frames()
+ - Fix a bug where drwav_read_raw() can call the read callback with a byte count of zero.
+
+v0.12.20 - 2021-06-11
+ - Fix some undefined behavior.
+
+v0.12.19 - 2021-02-21
+ - Fix a warning due to referencing _MSC_VER when it is undefined.
+ - Minor improvements to the management of some internal state concerning the data chunk cursor.
+
+v0.12.18 - 2021-01-31
+ - Clean up some static analysis warnings.
+
+v0.12.17 - 2021-01-17
+ - Minor fix to sample code in documentation.
+ - Correctly qualify a private API as private rather than public.
+ - Code cleanup.
+
+v0.12.16 - 2020-12-02
+ - Fix a bug when trying to read more bytes than can fit in a size_t.
+
+v0.12.15 - 2020-11-21
+ - Fix compilation with OpenWatcom.
+
+v0.12.14 - 2020-11-13
+ - Minor code clean up.
+
+v0.12.13 - 2020-11-01
+ - Improve compiler support for older versions of GCC.
+
+v0.12.12 - 2020-09-28
+ - Add support for RF64.
+ - Fix a bug in writing mode where the size of the RIFF chunk incorrectly includes the header section.
+
+v0.12.11 - 2020-09-08
+ - Fix a compilation error on older compilers.
+
+v0.12.10 - 2020-08-24
+ - Fix a bug when seeking with ADPCM formats.
+
+v0.12.9 - 2020-08-02
+ - Simplify sized types.
+
+v0.12.8 - 2020-07-25
+ - Fix a compilation warning.
+
+v0.12.7 - 2020-07-15
+ - Fix some bugs on big-endian architectures.
+ - Fix an error in s24 to f32 conversion.
+
+v0.12.6 - 2020-06-23
+ - Change drwav_read_*() to allow NULL to be passed in as the output buffer which is equivalent to a forward seek.
+ - Fix a buffer overflow when trying to decode invalid IMA-ADPCM files.
+ - Add include guard for the implementation section.
+
+v0.12.5 - 2020-05-27
+ - Minor documentation fix.
+
+v0.12.4 - 2020-05-16
+ - Replace assert() with DRWAV_ASSERT().
+ - Add compile-time and run-time version querying.
+ - DRWAV_VERSION_MINOR
+ - DRWAV_VERSION_MAJOR
+ - DRWAV_VERSION_REVISION
+ - DRWAV_VERSION_STRING
+ - drwav_version()
+ - drwav_version_string()
+
+v0.12.3 - 2020-04-30
+ - Fix compilation errors with VC6.
+
+v0.12.2 - 2020-04-21
+ - Fix a bug where drwav_init_file() does not close the file handle after attempting to load an erroneous file.
+
+v0.12.1 - 2020-04-13
+ - Fix some pedantic warnings.
+
+v0.12.0 - 2020-04-04
+ - API CHANGE: Add container and format parameters to the chunk callback.
+ - Minor documentation updates.
+
+v0.11.5 - 2020-03-07
+ - Fix compilation error with Visual Studio .NET 2003.
+
+v0.11.4 - 2020-01-29
+ - Fix some static analysis warnings.
+ - Fix a bug when reading f32 samples from an A-law encoded stream.
+
+v0.11.3 - 2020-01-12
+ - Minor changes to some f32 format conversion routines.
+ - Minor bug fix for ADPCM conversion when end of file is reached.
+
+v0.11.2 - 2019-12-02
+ - Fix a possible crash when using custom memory allocators without a custom realloc() implementation.
+ - Fix an integer overflow bug.
+ - Fix a null pointer dereference bug.
+ - Add limits to sample rate, channels and bits per sample to tighten up some validation.
+
+v0.11.1 - 2019-10-07
+ - Internal code clean up.
+
+v0.11.0 - 2019-10-06
+ - API CHANGE: Add support for user defined memory allocation routines. This system allows the program to specify their own memory allocation
+ routines with a user data pointer for client-specific contextual data. This adds an extra parameter to the end of the following APIs:
+ - drwav_init()
+ - drwav_init_ex()
+ - drwav_init_file()
+ - drwav_init_file_ex()
+ - drwav_init_file_w()
+ - drwav_init_file_w_ex()
+ - drwav_init_memory()
+ - drwav_init_memory_ex()
+ - drwav_init_write()
+ - drwav_init_write_sequential()
+ - drwav_init_write_sequential_pcm_frames()
+ - drwav_init_file_write()
+ - drwav_init_file_write_sequential()
+ - drwav_init_file_write_sequential_pcm_frames()
+ - drwav_init_file_write_w()
+ - drwav_init_file_write_sequential_w()
+ - drwav_init_file_write_sequential_pcm_frames_w()
+ - drwav_init_memory_write()
+ - drwav_init_memory_write_sequential()
+ - drwav_init_memory_write_sequential_pcm_frames()
+ - drwav_open_and_read_pcm_frames_s16()
+ - drwav_open_and_read_pcm_frames_f32()
+ - drwav_open_and_read_pcm_frames_s32()
+ - drwav_open_file_and_read_pcm_frames_s16()
+ - drwav_open_file_and_read_pcm_frames_f32()
+ - drwav_open_file_and_read_pcm_frames_s32()
+ - drwav_open_file_and_read_pcm_frames_s16_w()
+ - drwav_open_file_and_read_pcm_frames_f32_w()
+ - drwav_open_file_and_read_pcm_frames_s32_w()
+ - drwav_open_memory_and_read_pcm_frames_s16()
+ - drwav_open_memory_and_read_pcm_frames_f32()
+ - drwav_open_memory_and_read_pcm_frames_s32()
+ Set this extra parameter to NULL to use defaults which is the same as the previous behaviour. Setting this NULL will use
+ DRWAV_MALLOC, DRWAV_REALLOC and DRWAV_FREE.
+ - Add support for reading and writing PCM frames in an explicit endianness. New APIs:
+ - drwav_read_pcm_frames_le()
+ - drwav_read_pcm_frames_be()
+ - drwav_read_pcm_frames_s16le()
+ - drwav_read_pcm_frames_s16be()
+ - drwav_read_pcm_frames_f32le()
+ - drwav_read_pcm_frames_f32be()
+ - drwav_read_pcm_frames_s32le()
+ - drwav_read_pcm_frames_s32be()
+ - drwav_write_pcm_frames_le()
+ - drwav_write_pcm_frames_be()
+ - Remove deprecated APIs.
+ - API CHANGE: The following APIs now return native-endian data. Previously they returned little-endian data.
+ - drwav_read_pcm_frames()
+ - drwav_read_pcm_frames_s16()
+ - drwav_read_pcm_frames_s32()
+ - drwav_read_pcm_frames_f32()
+ - drwav_open_and_read_pcm_frames_s16()
+ - drwav_open_and_read_pcm_frames_s32()
+ - drwav_open_and_read_pcm_frames_f32()
+ - drwav_open_file_and_read_pcm_frames_s16()
+ - drwav_open_file_and_read_pcm_frames_s32()
+ - drwav_open_file_and_read_pcm_frames_f32()
+ - drwav_open_file_and_read_pcm_frames_s16_w()
+ - drwav_open_file_and_read_pcm_frames_s32_w()
+ - drwav_open_file_and_read_pcm_frames_f32_w()
+ - drwav_open_memory_and_read_pcm_frames_s16()
+ - drwav_open_memory_and_read_pcm_frames_s32()
+ - drwav_open_memory_and_read_pcm_frames_f32()
+
+v0.10.1 - 2019-08-31
+ - Correctly handle partial trailing ADPCM blocks.
+
+v0.10.0 - 2019-08-04
+ - Remove deprecated APIs.
+ - Add wchar_t variants for file loading APIs:
+ drwav_init_file_w()
+ drwav_init_file_ex_w()
+ drwav_init_file_write_w()
+ drwav_init_file_write_sequential_w()
+ - Add drwav_target_write_size_bytes() which calculates the total size in bytes of a WAV file given a format and sample count.
+ - Add APIs for specifying the PCM frame count instead of the sample count when opening in sequential write mode:
+ drwav_init_write_sequential_pcm_frames()
+ drwav_init_file_write_sequential_pcm_frames()
+ drwav_init_file_write_sequential_pcm_frames_w()
+ drwav_init_memory_write_sequential_pcm_frames()
+ - Deprecate drwav_open*() and drwav_close():
+ drwav_open()
+ drwav_open_ex()
+ drwav_open_write()
+ drwav_open_write_sequential()
+ drwav_open_file()
+ drwav_open_file_ex()
+ drwav_open_file_write()
+ drwav_open_file_write_sequential()
+ drwav_open_memory()
+ drwav_open_memory_ex()
+ drwav_open_memory_write()
+ drwav_open_memory_write_sequential()
+ drwav_close()
+ - Minor documentation updates.
+
+v0.9.2 - 2019-05-21
+ - Fix warnings.
+
+v0.9.1 - 2019-05-05
+ - Add support for C89.
+ - Change license to choice of public domain or MIT-0.
+
+v0.9.0 - 2018-12-16
+ - API CHANGE: Add new reading APIs for reading by PCM frames instead of samples. Old APIs have been deprecated and
+ will be removed in v0.10.0. Deprecated APIs and their replacements:
+ drwav_read() -> drwav_read_pcm_frames()
+ drwav_read_s16() -> drwav_read_pcm_frames_s16()
+ drwav_read_f32() -> drwav_read_pcm_frames_f32()
+ drwav_read_s32() -> drwav_read_pcm_frames_s32()
+ drwav_seek_to_sample() -> drwav_seek_to_pcm_frame()
+ drwav_write() -> drwav_write_pcm_frames()
+ drwav_open_and_read_s16() -> drwav_open_and_read_pcm_frames_s16()
+ drwav_open_and_read_f32() -> drwav_open_and_read_pcm_frames_f32()
+ drwav_open_and_read_s32() -> drwav_open_and_read_pcm_frames_s32()
+ drwav_open_file_and_read_s16() -> drwav_open_file_and_read_pcm_frames_s16()
+ drwav_open_file_and_read_f32() -> drwav_open_file_and_read_pcm_frames_f32()
+ drwav_open_file_and_read_s32() -> drwav_open_file_and_read_pcm_frames_s32()
+ drwav_open_memory_and_read_s16() -> drwav_open_memory_and_read_pcm_frames_s16()
+ drwav_open_memory_and_read_f32() -> drwav_open_memory_and_read_pcm_frames_f32()
+ drwav_open_memory_and_read_s32() -> drwav_open_memory_and_read_pcm_frames_s32()
+ drwav::totalSampleCount -> drwav::totalPCMFrameCount
+ - API CHANGE: Rename drwav_open_and_read_file_*() to drwav_open_file_and_read_*().
+ - API CHANGE: Rename drwav_open_and_read_memory_*() to drwav_open_memory_and_read_*().
+ - Add built-in support for smpl chunks.
+ - Add support for firing a callback for each chunk in the file at initialization time.
+ - This is enabled through the drwav_init_ex(), etc. family of APIs.
+ - Handle invalid FMT chunks more robustly.
+
+v0.8.5 - 2018-09-11
+ - Const correctness.
+ - Fix a potential stack overflow.
+
+v0.8.4 - 2018-08-07
+ - Improve 64-bit detection.
+
+v0.8.3 - 2018-08-05
+ - Fix C++ build on older versions of GCC.
+
+v0.8.2 - 2018-08-02
+ - Fix some big-endian bugs.
+
+v0.8.1 - 2018-06-29
+ - Add support for sequential writing APIs.
+ - Disable seeking in write mode.
+ - Fix bugs with Wave64.
+ - Fix typos.
+
+v0.8 - 2018-04-27
+ - Bug fix.
+ - Start using major.minor.revision versioning.
+
+v0.7f - 2018-02-05
+ - Restrict ADPCM formats to a maximum of 2 channels.
+
+v0.7e - 2018-02-02
+ - Fix a crash.
+
+v0.7d - 2018-02-01
+ - Fix a crash.
+
+v0.7c - 2018-02-01
+ - Set drwav.bytesPerSample to 0 for all compressed formats.
+ - Fix a crash when reading 16-bit floating point WAV files. In this case dr_wav will output silence for
+ all format conversion reading APIs (*_s16, *_s32, *_f32 APIs).
+ - Fix some divide-by-zero errors.
+
+v0.7b - 2018-01-22
+ - Fix errors with seeking of compressed formats.
+ - Fix compilation error when DR_WAV_NO_CONVERSION_API
+
+v0.7a - 2017-11-17
+ - Fix some GCC warnings.
+
+v0.7 - 2017-11-04
+ - Add writing APIs.
+
+v0.6 - 2017-08-16
+ - API CHANGE: Rename dr_* types to drwav_*.
+ - Add support for custom implementations of malloc(), realloc(), etc.
+ - Add support for Microsoft ADPCM.
+ - Add support for IMA ADPCM (DVI, format code 0x11).
+ - Optimizations to drwav_read_s16().
+ - Bug fixes.
+
+v0.5g - 2017-07-16
+ - Change underlying type for booleans to unsigned.
+
+v0.5f - 2017-04-04
+ - Fix a minor bug with drwav_open_and_read_s16() and family.
+
+v0.5e - 2016-12-29
+ - Added support for reading samples as signed 16-bit integers. Use the _s16() family of APIs for this.
+ - Minor fixes to documentation.
+
+v0.5d - 2016-12-28
+ - Use drwav_int* and drwav_uint* sized types to improve compiler support.
+
+v0.5c - 2016-11-11
+ - Properly handle JUNK chunks that come before the FMT chunk.
+
+v0.5b - 2016-10-23
+ - A minor change to drwav_bool8 and drwav_bool32 types.
+
+v0.5a - 2016-10-11
+ - Fixed a bug with drwav_open_and_read() and family due to incorrect argument ordering.
+ - Improve A-law and mu-law efficiency.
+
+v0.5 - 2016-09-29
+ - API CHANGE. Swap the order of "channels" and "sampleRate" parameters in drwav_open_and_read*(). Rationale for this is to
+ keep it consistent with dr_audio and dr_flac.
+
+v0.4b - 2016-09-18
+ - Fixed a typo in documentation.
+
+v0.4a - 2016-09-18
+ - Fixed a typo.
+ - Change date format to ISO 8601 (YYYY-MM-DD)
+
+v0.4 - 2016-07-13
+ - API CHANGE. Make onSeek consistent with dr_flac.
+ - API CHANGE. Rename drwav_seek() to drwav_seek_to_sample() for clarity and consistency with dr_flac.
+ - Added support for Sony Wave64.
+
+v0.3a - 2016-05-28
+ - API CHANGE. Return drwav_bool32 instead of int in onSeek callback.
+ - Fixed a memory leak.
+
+v0.3 - 2016-05-22
+ - Lots of API changes for consistency.
+
+v0.2a - 2016-05-16
+ - Fixed Linux/GCC build.
+
+v0.2 - 2016-05-11
+ - Added support for reading data as signed 32-bit PCM for consistency with dr_flac.
+
+v0.1a - 2016-05-07
+ - Fixed a bug in drwav_open_file() where the file handle would not be closed if the loader failed to initialize.
+
+v0.1 - 2016-05-04
+ - Initial versioned release.
+*/
+
+/*
+This software is available as a choice of the following licenses. Choose
+whichever you prefer.
+
+===============================================================================
+ALTERNATIVE 1 - Public Domain (www.unlicense.org)
+===============================================================================
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+software, either in source code form or as a compiled binary, for any purpose,
+commercial or non-commercial, and by any means.
+
+In jurisdictions that recognize copyright laws, the author or authors of this
+software dedicate any and all copyright interest in the software to the public
+domain. We make this dedication for the benefit of the public at large and to
+the detriment of our heirs and successors. We intend this dedication to be an
+overt act of relinquishment in perpetuity of all present and future rights to
+this software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org/>
+
+===============================================================================
+ALTERNATIVE 2 - MIT No Attribution
+===============================================================================
+Copyright 2020 David Reid
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
--- /dev/null
+++ b/mkfile
@@ -1,0 +1,17 @@
+</$objtype/mkfile
+BIN=/$objtype/bin/audio
+
+TARG=\
+ wavenc\
+ #wavdec\
+
+OFILES=\
+ wavenc.$O\
+
+HFILES=\
+ dr_wav.h\
+
+</sys/src/cmd/mkmany
+
+CC=pcc
+CFLAGS=-c -p -DDR_WAV_IMPLEMENTATION -DDR_WAV_NO_WCHAR
--- /dev/null
+++ b/wavenc.c
@@ -1,0 +1,46 @@
+#include <stdio.h>
+#include "dr_wav.h"
+
+enum{+ Rate = 44100,
+ Nsamp = 2,
+ Nchan = 2,
+};
+
+void
+main(int argc, char **arrrrrgv)
+{+ drwav wav;
+ size_t n;
+ drwav_uint64 nf;
+ drwav_data_format fmt;
+ drwav_int16 buf[32*1024];
+ FILE *fi;
+ char *ffo;
+
+ fi = stdin;
+ if(argc > 1){+ if((fi = fopen(arrrrrgv[1], "rb")) == NULL){+ fprintf(stderr, "open: nope\n");
+ exit(1);
+ }
+ }
+ ffo = "/fd/1";
+ if(argc > 2)
+ ffo = arrrrrgv[2];
+ fmt.container = drwav_container_riff;
+ fmt.format = DR_WAVE_FORMAT_PCM;
+ fmt.bitsPerSample = 8 * sizeof(buf[0]);
+ fmt.channels = Nchan;
+ fmt.sampleRate = Rate;
+ if(!drwav_init_file_write(&wav, ffo, &fmt, NULL)){+ fprintf(stderr, "drwav_init_file_write: nope\n");
+ exit(1);
+ }
+ while((n = fread(buf, Nsamp * sizeof buf[0], sizeof buf / (Nsamp * sizeof buf[0]), fi)) > 0){+ if((nf = drwav_write_pcm_frames(&wav, n, buf)) <= 0)
+ break;
+ }
+ drwav_uninit(&wav);
+ exit(0);
+}