static
void init_header(struct ExtSoundHeader *header, Ptr samples,
unsigned int nsamples, unsigned int channels,
unsigned int speed, unsigned int bits)
{
double dspeed = speed;
header->samplePtr = samples;
header->numChannels = channels;
header->sampleRate = FixRatio(speed, 1);
header->loopStart = 0;
header->loopEnd = 0;
header->encode = extSH;
header->baseFrequency = kMiddleC;
header->numFrames = nsamples;
dtox80(&dspeed, &header->AIFFSampleRate);
header->markerChunk = 0;
header->instrumentChunks = 0;
header->AESRecording = 0;
header->sampleSize = bits;
header->futureUse1 = 0;
header->futureUse2 = 0;
header->futureUse3 = 0;
header->futureUse4 = 0;
}
static BOOL SoundBuffer_Init(UINT rate, UINT samples) {
QSOUND qs;
double drate;
extended80 extFreq;
UINT buffersize;
int i;
ExtSoundHeader *buf;
qs = &QSound;
qs->rate = rate;
qs->samples = samples;
buffersize = samples * 4;
qs->buffersize = buffersize;
drate = rate;
dtox80(&drate, &extFreq);
#if !defined(SOUND_CRITICAL)
qs->extendbuffer = (SINT16 *)_MALLOC(buffersize, "Extend buffer");
if (qs->extendbuffer == NULL) {
goto sbinit_err;
}
#endif
buffersize += sizeof(ExtSoundHeader);
for (i=0; i<SOUNDBUFFERS; i++) {
buf = (ExtSoundHeader *)_MALLOC(buffersize, "ExtSoundHeader");
qs->buf[i] = buf;
if (buf == NULL) {
goto sbinit_err;
}
ZeroMemory(buf, buffersize);
buf->numChannels = 2;
buf->sampleRate = (UInt32)rate << 16;
buf->encode = extSH;
buf->numFrames = samples;
buf->AIFFSampleRate = extFreq;
buf->sampleSize = 16;
qs->cmd[i].cmd = bufferCmd;
qs->cmd[i].param2 = (SInt32)buf;
qs->cbcmd[i].cmd = callBackCmd;
qs->cbcmd[i].param1 = (i + 1) % SOUNDBUFFERS;
}
QS_Avail = TRUE;
SndDoCommand(qs->hdl, &qs->cmd[0], TRUE);
SndDoCommand(qs->hdl, &qs->cbcmd[0], TRUE);
return(SUCCESS);
sbinit_err:
return(FAILURE);
}
