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Create WAVEFORMATEXTENSIBLE wave files for multi-channel and float support

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This commit is contained in:
Chris Robinson 2010-03-18 00:53:58 -07:00
parent 0fee20a415
commit bdfafb454b
1 changed files with 65 additions and 28 deletions
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93
Alc/wave.c
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@ -42,6 +42,26 @@ typedef struct {
static const ALCchar waveDevice[] = "Wave File Writer";
static const ALubyte SUBTYPE_PCM[] = {
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xaa,
0x00, 0x38, 0x9b, 0x71
};
static const ALubyte SUBTYPE_FLOAT[] = {
0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xaa,
0x00, 0x38, 0x9b, 0x71
};
static const ALuint channel_masks[] = {
0, /* invalid */
0x4, /* Mono */
0x1 | 0x2, /* Stereo */
0, /* 3 channel */
0x1 | 0x2 | 0x10 | 0x20, /* Quad */
0, /* 5 channel */
0x1 | 0x2 | 0x4 | 0x8 | 0x10 | 0x20, /* 5.1 */
0x1 | 0x2 | 0x4 | 0x8 | 0x100 | 0x200 | 0x400, /* 6.1 */
0x1 | 0x2 | 0x4 | 0x8 | 0x10 | 0x20 | 0x200 | 0x400, /* 7.1 */
};
static ALuint WaveProc(ALvoid *ptr)
{
@ -76,13 +96,21 @@ static ALuint WaveProc(ALvoid *ptr)
{
aluMixData(pDevice, data->buffer, pDevice->UpdateSize);
if(uSB.b[0] != 1 && aluBytesFromFormat(pDevice->Format) > 1)
if(uSB.b[0] != 1)
{
ALubyte *bytes = data->buffer;
ALuint i;
for(i = 0;i < data->size;i++)
fputc(bytes[i^1], data->f);
if(aluBytesFromFormat(pDevice->Format) == 2)
{
for(i = 0;i < data->size;i++)
fputc(bytes[i^1], data->f);
}
else if(aluBytesFromFormat(pDevice->Format) == 4)
{
for(i = 0;i < data->size;i++)
fputc(bytes[i^3], data->f);
}
}
else
fs = fwrite(data->buffer, frameSize, pDevice->UpdateSize,
@ -151,42 +179,37 @@ static ALCboolean wave_reset_playback(ALCdevice *device)
bits = aluBytesFromFormat(device->Format) * 8;
channels = aluChannelsFromFormat(device->Format);
if(channels != 1 && channels != 2)
/* 7.1 max */
if(channels > 8)
{
if(bits == 8)
device->Format = AL_FORMAT_STEREO8;
device->Format = AL_FORMAT_71CHN8;
else if(bits == 16)
device->Format = AL_FORMAT_71CHN16;
else
{
device->Format = AL_FORMAT_STEREO16;
bits = 16;
device->Format = AL_FORMAT_71CHN32;
bits = 32;
}
channels = 2;
}
else if(bits != 8 && bits != 16)
{
if(channels == 1)
device->Format = AL_FORMAT_MONO16;
else
device->Format = AL_FORMAT_STEREO16;
bits = 16;
channels = 8;
}
fprintf(data->f, "RIFF");
fputc(0, data->f); // 'RIFF' header len; filled in at close
fputc(0, data->f);
fputc(0, data->f);
fputc(0, data->f);
fputc(0xFF, data->f); // 'RIFF' header len; filled in at close
fputc(0xFF, data->f);
fputc(0xFF, data->f);
fputc(0xFF, data->f);
fprintf(data->f, "WAVE");
fprintf(data->f, "fmt ");
fputc(16, data->f); // 'fmt ' header len; 16 bytes for PCM
fputc(40, data->f); // 'fmt ' header len; 40 bytes for EXTENSIVLE
fputc(0, data->f);
fputc(0, data->f);
fputc(0, data->f);
// 16-bit val, format type id (PCM: 1)
fputc(1, data->f);
fputc(0, data->f);
// 16-bit val, format type id (extensible: 0xFFFE)
fputc(0xFE, data->f);
fputc(0xFF, data->f);
// 16-bit val, channel count
fputc(channels&0xff, data->f);
fputc((channels>>8)&0xff, data->f);
@ -208,12 +231,26 @@ static ALCboolean wave_reset_playback(ALCdevice *device)
// 16-bit val, bits per sample
fputc(bits&0xff, data->f);
fputc((bits>>8)&0xff, data->f);
// 16-bit val, extra byte count
fputc(22, data->f);
fputc(0, data->f);
// 16-bit val, valid bits per sample
fputc(bits&0xff, data->f);
fputc((bits>>8)&0xff, data->f);
// 32-bit val, channel mask
i = channel_masks[channels];
fputc(i&0xff, data->f);
fputc((i>>8)&0xff, data->f);
fputc((i>>16)&0xff, data->f);
fputc((i>>24)&0xff, data->f);
// 16 byte GUID, sub-type format
i = fwrite(((bits==32) ? SUBTYPE_FLOAT : SUBTYPE_PCM), 1, 16, data->f);
fprintf(data->f, "data");
fputc(0, data->f); // 'data' header len; filled in at close
fputc(0, data->f);
fputc(0, data->f);
fputc(0, data->f);
fputc(0xFF, data->f); // 'data' header len; filled in at close
fputc(0xFF, data->f);
fputc(0xFF, data->f);
fputc(0xFF, data->f);
if(ferror(data->f))
{