ref: 60fa9e81165a47bf492e0835459e2dedf72df660
dir: /common/libsndfile/src/sndfile.h/
/*
** Copyright (C) 1999-2000 Erik de Castro Lopo <erikd@zip.com.au>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU Lesser General Public License as published by
** the Free Software Foundation; either version 2.1 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* sndfile.h -- system-wide definitions */
#ifndef SNDFILE_H
#define SNDFILE_H
#include <stdio.h>
#include <stdlib.h>
/* For the Metrowerks CodeWarrior Pro Compiler (mainly MacOS) */
#if (defined (__MWERKS__))
#include <unix.h>
#else
#include <sys/types.h>
#endif
#ifdef _WIN32
#pragma pack(push,1)
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* The following file types can be read and written.
** A file type would consist of a major type (ie SF_FORMAT_WAV) bitwise
** ORed with a minor type (ie SF_FORMAT_PCM). SF_FORMAT_TYPEMASK and
** SF_FORMAT_SUBMASK can be used to separate the major and minor file
** types.
*/
enum
{ SF_FORMAT_WAV = 0x10000, /* Microsoft WAV format (big endian). */
SF_FORMAT_AIFF = 0x20000, /* Apple/SGI AIFF format (little endian). */
SF_FORMAT_AU = 0x30000, /* Sun/NeXT AU format (big endian). */
SF_FORMAT_AULE = 0x40000, /* DEC AU format (little endian). */
SF_FORMAT_RAW = 0x50000, /* RAW PCM data. */
SF_FORMAT_PAF = 0x60000, /* Ensoniq PARIS file format. */
SF_FORMAT_SVX = 0x70000, /* Amiga IFF / SVX8 / SV16 format. */
SF_FORMAT_NIST = 0x80000, /* Sphere NIST format. */
SF_FORMAT_PCM = 0x0001, /* PCM data in 8, 16, 24 or 32 bits. */
SF_FORMAT_FLOAT = 0x0002, /* 32 bit floats. */
SF_FORMAT_ULAW = 0x0003, /* U-Law encoded. */
SF_FORMAT_ALAW = 0x0004, /* A-Law encoded. */
SF_FORMAT_IMA_ADPCM = 0x0005, /* IMA ADPCM. */
SF_FORMAT_MS_ADPCM = 0x0006, /* Microsoft ADPCM. */
SF_FORMAT_PCM_BE = 0x0007, /* Big endian PCM data. */
SF_FORMAT_PCM_LE = 0x0008, /* Little endian PCM data. */
SF_FORMAT_PCM_S8 = 0x0009, /* Signed 8 bit PCM. */
SF_FORMAT_PCM_U8 = 0x000A, /* Unsigned 8 bit PCM. */
SF_FORMAT_SVX_FIB = 0x000B, /* SVX Fibonacci Delta encoding. */
SF_FORMAT_SVX_EXP = 0x000C, /* SVX Exponential Delta encoding. */
SF_FORMAT_GSM610 = 0x000D, /* GSM 6.10 encoding. */
SF_FORMAT_G721_32 = 0x000E, /* 32kbs G721 ADPCM encoding. */
SF_FORMAT_G723_24 = 0x000F, /* 24kbs G723 ADPCM encoding. */
SF_FORMAT_SUBMASK = 0xFFFF,
SF_FORMAT_TYPEMASK = 0x7FFF0000
} ;
/* Th following SF_FORMAT_RAW_* identifiers are deprecated. Use the
** SF_FORMAT_PCM_* idetifiers instead.
*/
#define SF_FORMAT_RAW_BE SF_FORMAT_PCM_BE
#define SF_FORMAT_RAW_LE SF_FORMAT_PCM_LE
#define SF_FORMAT_RAW_S8 SF_FORMAT_PCM_S8
#define SF_FORMAT_RAW_U8 SF_FORMAT_PCM_U8
/* A SNDFILE* pointer can be passed around much like stdio.h's FILE* pointer. */
typedef void SNDFILE ;
/* A pointer to a SF_INFO structure is passed to sf_open_read () and filled in.
** On write, the SF_INFO structure is filled in by the user and passed into
** sf_open_write ().
*/
typedef struct
{ unsigned int samplerate ;
unsigned int samples ;
unsigned int channels ;
unsigned int pcmbitwidth ; /* pcmbitwidth is deprecated. */
unsigned int format ;
unsigned int sections ;
unsigned int seekable ;
} SF_INFO ;
/* Open the specified file for read or write. On error, this will return
** a NULL pointer. To find the error number, pass a NULL SNDFILE to
** sf_perror () or sf_error_str ().
*/
SNDFILE* sf_open_read (const char *path, SF_INFO *wfinfo) ;
SNDFILE* sf_open_write (const char *path, const SF_INFO *wfinfo) ;
/* sf_perror () prints out the current error state.
** sf_error_str () returns the current error message to the caller in the
** string buffer provided.
*/
int sf_perror (SNDFILE *sndfile) ;
int sf_error_str (SNDFILE *sndfile, char* str, size_t len) ;
int sf_error_number (int errnum, char *str, size_t maxlen) ;
size_t sf_get_header_info (SNDFILE *sndfile, char* buffer, size_t bufferlen, size_t offset) ;
/* Get the library version string. */
size_t sf_get_lib_version (char* buffer, size_t bufferlen) ;
/* Return TRUE if fields of the SF_INFO struct are a valid combination of values. */
int sf_format_check (const SF_INFO *info) ;
/* Return the maximum absolute sample value in the SNDFILE. */
double sf_signal_max (SNDFILE *sndfile) ;
/* Seek within the waveform data chunk of the SNDFILE. sf_seek () uses
** the same values for whence (SEEK_SET, SEEK_CUR and SEEK_END) as
** stdio.h functions lseek () and fseek ().
** An offset of zero with whence set to SEEK_SET will position the
** read / write pointer to the first data sample.
** On success sf_seek returns the current position in (multi-channel)
** samples from the start of the file.
** On error sf_seek returns -1.
*/
off_t sf_seek (SNDFILE *sndfile, off_t frames, int whence) ;
/* Functions for reading/writing the waveform data of a sound file.
*/
size_t sf_read_raw (SNDFILE *sndfile, void *ptr, size_t bytes) ;
size_t sf_write_raw (SNDFILE *sndfile, void *ptr, size_t bytes) ;
/* Functions for reading and writing the data chunk in terms of frames.
** The number of items actually read/written = frames * number of channels.
** sf_xxxx_raw read/writes the raw data bytes from/to the file
** sf_xxxx_uchar passes data in the unsigned char format
** sf_xxxx_char passes data in the signed char format
** sf_xxxx_short passes data in the native short format
** sf_xxxx_int passes data in the native int format
** sf_xxxx_float passes data in the native float format
** sf_xxxx_double passes data in the native double format
** For the double format, if the normalize flag is TRUE, the read/write
** operations will use floats/doubles in the rangs [-1.0 .. 1.0] to
** represent the minimum and maximum values of the waveform irrespective
** of the bitwidth of the input/output file.
** All of these read/write function return number of frames read/written.
*/
size_t sf_readf_short (SNDFILE *sndfile, short *ptr, size_t frames) ;
size_t sf_writef_short (SNDFILE *sndfile, short *ptr, size_t frames) ;
size_t sf_readf_int (SNDFILE *sndfile, int *ptr, size_t frames) ;
size_t sf_writef_int (SNDFILE *sndfile, int *ptr, size_t frames) ;
size_t sf_readf_double (SNDFILE *sndfile, double *ptr, size_t frames, int normalize) ;
size_t sf_writef_double(SNDFILE *sndfile, double *ptr, size_t frames, int normalize) ;
/* Functions for reading and writing the data chunk in terms of items.
** Otherwise similar to above.
** All of these read/write function return number of items read/written.
*/
size_t sf_read_short (SNDFILE *sndfile, short *ptr, size_t items) ;
size_t sf_write_short (SNDFILE *sndfile, short *ptr, size_t items) ;
size_t sf_read_int (SNDFILE *sndfile, int *ptr, size_t items) ;
size_t sf_write_int (SNDFILE *sndfile, int *ptr, size_t items) ;
size_t sf_read_double (SNDFILE *sndfile, double *ptr, size_t items, int normalize) ;
size_t sf_write_double (SNDFILE *sndfile, double *ptr, size_t items, int normalize) ;
/* Close the SNDFILE. Returns 0 on success, or an error number. */
int sf_close (SNDFILE *sndfile) ;
#ifdef __cplusplus
} /* extern "C" */
#endif /* __cplusplus */
#ifdef _WIN32
#pragma pack(pop,1)
#endif
#endif /* SNDFILE_H */