ref: 77e70eb42d0b3b7430fba684c9f024fdcc0ff9ce
dir: /src/ft2_sample_loader.c/
// for finding memory leaks in debug mode with Visual Studio
#if defined _DEBUG && defined _MSC_VER
#include <crtdbg.h>
#endif
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <math.h>
#include "ft2_header.h"
#include "ft2_gui.h"
#include "ft2_unicode.h"
#include "ft2_audio.h"
#include "ft2_sample_ed.h"
#include "ft2_mouse.h"
#include "ft2_diskop.h"
#include "ft2_structs.h"
#ifdef HAS_LIBFLAC
bool loadFLAC(FILE *f, uint32_t filesize);
#endif
bool loadAIFF(FILE *f, uint32_t filesize);
bool loadIFF(FILE *f, uint32_t filesize);
bool loadRAW(FILE *f, uint32_t filesize);
bool loadWAV(FILE *f, uint32_t filesize);
enum
{
FORMAT_UNKNOWN = 0,
FORMAT_IFF = 1,
FORMAT_WAV = 2,
FORMAT_AIFF = 3,
FORMAT_FLAC = 4
};
// file extensions accepted by Disk Op. in sample mode
char *supportedSmpExtensions[] =
{
"iff", "raw", "wav", "snd", "smp", "sam", "aif", "pat",
"aiff","flac", // IMPORTANT: Remember comma after last entry!!!
"END_OF_LIST" // do NOT move, remove or edit this line!
};
// globals for sample loaders
bool loadAsInstrFlag, smpFilenameSet;
char *smpFilename;
uint8_t sampleSlot;
sample_t tmpSmp;
// --------------------------
static volatile bool sampleIsLoading;
static SDL_Thread *thread;
static void freeTmpSample(sample_t *s);
// Crude sample detection routine. These aren't always accurate detections!
static int8_t detectSample(FILE *f)
{
uint8_t D[512];
uint32_t oldPos = ftell(f);
rewind(f);
memset(D, 0, sizeof (D));
fread(D, 1, sizeof (D), f);
fseek(f, oldPos, SEEK_SET);
if (!memcmp("fLaC", &D[0], 4)) // XXX: Kinda lousy detection...
return FORMAT_FLAC;
if (!memcmp("FORM", &D[0], 4) && (!memcmp("8SVX", &D[8], 4) || !memcmp("16SV", &D[8], 4)))
return FORMAT_IFF;
if (!memcmp("RIFF", &D[0], 4) && !memcmp("WAVE", &D[8], 4))
return FORMAT_WAV;
if (!memcmp("FORM", &D[0], 4) && (!memcmp("AIFF", &D[8], 4) || !memcmp("AIFC", &D[8], 4)))
return FORMAT_AIFF;
return FORMAT_UNKNOWN;
}
static int32_t SDLCALL loadSampleThread(void *ptr)
{
if (editor.tmpFilenameU == NULL)
{
loaderMsgBox("General I/O error during loading!");
return false;
}
FILE *f = UNICHAR_FOPEN(editor.tmpFilenameU, "rb");
if (f == NULL)
{
loaderMsgBox("General I/O error during loading! Is the file in use?");
return false;
}
int8_t format = detectSample(f);
fseek(f, 0, SEEK_END);
uint32_t filesize = ftell(f);
if (filesize == 0)
{
fclose(f);
loaderMsgBox("Error loading sample: The file is empty!");
return false;
}
bool sampleLoaded = false;
rewind(f);
switch (format)
{
case FORMAT_FLAC:
{
#ifdef HAS_LIBFLAC
sampleLoaded = loadFLAC(f, filesize);
#else
loaderMsgBox("Can't load sample: Program is not compiled with FLAC support!");
#endif
}
break;
case FORMAT_IFF: sampleLoaded = loadIFF(f, filesize); break;
case FORMAT_WAV: sampleLoaded = loadWAV(f, filesize); break;
case FORMAT_AIFF: sampleLoaded = loadAIFF(f, filesize); break;
default: sampleLoaded = loadRAW(f, filesize); break;
}
fclose(f);
if (!sampleLoaded)
goto loadError;
// sample loaded successfully!
if (!smpFilenameSet) // if we didn't set a custom sample name in the loader, set it to its filename
{
char *tmpFilename = unicharToCp437(editor.tmpFilenameU, true);
if (tmpFilename != NULL)
{
int32_t i = (int32_t)strlen(tmpFilename);
while (i--)
{
if (tmpFilename[i] == DIR_DELIMITER)
break;
}
char *tmpPtr = tmpFilename;
if (i > 0)
tmpPtr += i+1;
sanitizeFilename(tmpPtr);
int32_t filenameLen = (int32_t)strlen(tmpPtr);
for (i = 0; i < 22; i++)
{
if (i < filenameLen)
tmpSmp.name[i] = tmpPtr[i];
else
tmpSmp.name[i] = '\0';
}
free(tmpFilename);
}
}
fixString(tmpSmp.name, 21); // remove leading spaces from sample filename
lockMixerCallback();
if (loadAsInstrFlag) // if loaded in instrument mode
{
freeInstr(editor.curInstr);
memset(song.instrName[editor.curInstr], 0, 23);
}
if (instr[editor.curInstr] == NULL)
allocateInstr(editor.curInstr);
if (instr[editor.curInstr] == NULL)
{
loaderMsgBox("Not enough memory!");
goto loadError;
}
sample_t *s = &instr[editor.curInstr]->smp[sampleSlot];
freeSample(editor.curInstr, sampleSlot);
memcpy(s, &tmpSmp, sizeof (sample_t));
sanitizeSample(s);
fixSample(s); // prepares sample for branchless resampling interpolation
fixInstrAndSampleNames(editor.curInstr);
unlockMixerCallback();
setSongModifiedFlag();
// when caught in main/video thread, it disables busy mouse and sets sampleIsLoading to true
editor.updateCurSmp = true;
return true;
loadError:
setMouseBusy(false);
freeTmpSample(&tmpSmp);
sampleIsLoading = false;
return false;
(void)ptr;
}
static void freeTmpSample(sample_t *s)
{
freeSmpData(s);
}
void removeSampleIsLoadingFlag(void)
{
sampleIsLoading = false;
}
bool loadSample(UNICHAR *filenameU, uint8_t smpNr, bool instrFlag)
{
if (sampleIsLoading || filenameU == NULL)
return false;
// setup message box functions
loaderMsgBox = myLoaderMsgBoxThreadSafe;
loaderSysReq = okBoxThreadSafe;
if (editor.curInstr == 0)
{
loaderMsgBox("The zero-instrument cannot hold intrument data.");
return false;
}
sampleSlot = smpNr;
loadAsInstrFlag = instrFlag;
sampleIsLoading = true;
smpFilenameSet = false;
memset(&tmpSmp, 0, sizeof (tmpSmp));
UNICHAR_STRCPY(editor.tmpFilenameU, filenameU);
mouseAnimOn();
thread = SDL_CreateThread(loadSampleThread, NULL, NULL);
if (thread == NULL)
{
sampleIsLoading = false;
loaderMsgBox("Couldn't create thread!");
return false;
}
SDL_DetachThread(thread);
return true;
}
void normalizeSigned32Bit(int32_t *sampleData, uint32_t sampleLength)
{
uint32_t i;
uint32_t sampleVolPeak = 0;
for (i = 0; i < sampleLength; i++)
{
const uint32_t sample = ABS(sampleData[i]);
if (sampleVolPeak < sample)
sampleVolPeak = sample;
}
if (sampleVolPeak <= 0)
return;
const double dGain = (double)INT32_MAX / sampleVolPeak;
for (i = 0; i < sampleLength; i++)
sampleData[i] = (int32_t)(sampleData[i] * dGain);
}
void normalize32BitFloatToSigned16Bit(float *fSampleData, uint32_t sampleLength)
{
uint32_t i;
float fSampleVolPeak = 0.0f;
for (i = 0; i < sampleLength; i++)
{
const float fSample = fabsf(fSampleData[i]);
if (fSampleVolPeak < fSample)
fSampleVolPeak = fSample;
}
if (fSampleVolPeak <= 0.0f)
return;
const float fGain = (float)INT16_MAX / fSampleVolPeak;
for (i = 0; i < sampleLength; i++)
fSampleData[i] *= fGain;
}
void normalize64BitFloatToSigned16Bit(double *dSampleData, uint32_t sampleLength)
{
uint32_t i;
double dSampleVolPeak = 0.0;
for (i = 0; i < sampleLength; i++)
{
const double dSample = fabs(dSampleData[i]);
if (dSampleVolPeak < dSample)
dSampleVolPeak = dSample;
}
if (dSampleVolPeak <= 0.0)
return;
const double dGain = (double)INT16_MAX / dSampleVolPeak;
for (i = 0; i < sampleLength; i++)
dSampleData[i] *= dGain;
}