AerialX/openal-soft-android
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Use helpers to write 16- and 32-bit values

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This commit is contained in:
Chris Robinson 2010-11-21 06:54:41 -08:00
parent a7b4e0b5c5
commit 57a03bc2b5
1 changed files with 32 additions and 53 deletions
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85
Alc/wave.c
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@ -63,6 +63,22 @@ static const ALuint channel_masks[] = {
0x1 | 0x2 | 0x4 | 0x8 | 0x10 | 0x20 | 0x200 | 0x400, /* 7.1 */
};
static void fwrite16le(ALushort val, FILE *f)
{
fputc(val&0xff, f);
fputc((val>>8)&0xff, f);
}
static void fwrite32le(ALuint val, FILE *f)
{
fputc(val&0xff, f);
fputc((val>>8)&0xff, f);
fputc((val>>16)&0xff, f);
fputc((val>>24)&0xff, f);
}
static ALuint WaveProc(ALvoid *ptr)
{
ALCdevice *pDevice = (ALCdevice*)ptr;
@ -182,7 +198,7 @@ static void wave_close_playback(ALCdevice *device)
static ALCboolean wave_reset_playback(ALCdevice *device)
{
wave_data *data = (wave_data*)device->ExtraData;
ALuint channels, bits, i;
ALuint channels, bits;
size_t val;
fseek(data->f, 0, SEEK_SET);
@ -207,62 +223,36 @@ static ALCboolean wave_reset_playback(ALCdevice *device)
}
fprintf(data->f, "RIFF");
fputc(0xFF, data->f); // 'RIFF' header len; filled in at close
fputc(0xFF, data->f);
fputc(0xFF, data->f);
fputc(0xFF, data->f);
fwrite32le(0xFFFFFFFF, data->f); // 'RIFF' header len; filled in at close
fprintf(data->f, "WAVE");
fprintf(data->f, "fmt ");
fputc(40, data->f); // 'fmt ' header len; 40 bytes for EXTENSIBLE
fputc(0, data->f);
fputc(0, data->f);
fputc(0, data->f);
fwrite32le(40, data->f); // 'fmt ' header len; 40 bytes for EXTENSIBLE
// 16-bit val, format type id (extensible: 0xFFFE)
fputc(0xFE, data->f);
fputc(0xFF, data->f);
fwrite16le(0xFFFE, data->f);
// 16-bit val, channel count
fputc(channels&0xff, data->f);
fputc((channels>>8)&0xff, data->f);
fwrite16le(channels, data->f);
// 32-bit val, frequency
fputc(device->Frequency&0xff, data->f);
fputc((device->Frequency>>8)&0xff, data->f);
fputc((device->Frequency>>16)&0xff, data->f);
fputc((device->Frequency>>24)&0xff, data->f);
fwrite32le(device->Frequency, data->f);
// 32-bit val, bytes per second
i = device->Frequency * channels * bits / 8;
fputc(i&0xff, data->f);
fputc((i>>8)&0xff, data->f);
fputc((i>>16)&0xff, data->f);
fputc((i>>24)&0xff, data->f);
fwrite32le(device->Frequency * channels * bits / 8, data->f);
// 16-bit val, frame size
i = channels * bits / 8;
fputc(i&0xff, data->f);
fputc((i>>8)&0xff, data->f);
fwrite16le(channels * bits / 8, data->f);
// 16-bit val, bits per sample
fputc(bits&0xff, data->f);
fputc((bits>>8)&0xff, data->f);
fwrite16le(bits, data->f);
// 16-bit val, extra byte count
fputc(22, data->f);
fputc(0, data->f);
fwrite16le(22, data->f);
// 16-bit val, valid bits per sample
fputc(bits&0xff, data->f);
fputc((bits>>8)&0xff, data->f);
fwrite16le(bits, 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);
fwrite32le(channel_masks[channels], data->f);
// 16 byte GUID, sub-type format
val = fwrite(((bits==32) ? SUBTYPE_FLOAT : SUBTYPE_PCM), 1, 16, data->f);
fprintf(data->f, "data");
fputc(0xFF, data->f); // 'data' header len; filled in at close
fputc(0xFF, data->f);
fputc(0xFF, data->f);
fputc(0xFF, data->f);
fwrite32le(0xFFFFFFFF, data->f); // 'data' header len; filled in at close
if(ferror(data->f))
{
@ -316,20 +306,9 @@ static void wave_stop_playback(ALCdevice *device)
{
dataLen = size - data->DataStart;
if(fseek(data->f, data->DataStart-4, SEEK_SET) == 0)
{
fputc(dataLen&0xff, data->f); // 'data' header len
fputc((dataLen>>8)&0xff, data->f);
fputc((dataLen>>16)&0xff, data->f);
fputc((dataLen>>24)&0xff, data->f);
}
fwrite32le(dataLen, data->f); // 'data' header len
if(fseek(data->f, 4, SEEK_SET) == 0)
{
size -= 8;
fputc(size&0xff, data->f); // 'WAVE' header len
fputc((size>>8)&0xff, data->f);
fputc((size>>16)&0xff, data->f);
fputc((size>>24)&0xff, data->f);
}
fwrite32le(size-8, data->f); // 'WAVE' header len
}
}