void SDLSoundCallback(void * userdata, uint16_t * buffer, int length)
{
// 1st, check to see if the DSP is running. If not, fill the buffer with L/RXTD and exit.
if (!DSPIsRunning())
{
for(int i=0; i<length; i+=2)
{
buffer[i + 0] = *ltxd;
buffer[i + 1] = *rtxd;
}
return;
}
// The length of time we're dealing with here is 1/48000 s, so we multiply this
// by the number of cycles per second to get the number of cycles for one sample.
//uint32_t riscClockRate = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL);
//uint32_t cyclesPerSample = riscClockRate / DAC_AUDIO_RATE;
// This is the length of time
// timePerSample = (1000000.0 / (double)riscClockRate) * ();
// Now, run the DSP for that length of time for each sample we need to make
bufferIndex = 0;
sampleBuffer = buffer;
// If length is the length of the sample buffer in BYTES, then shouldn't the # of
// samples be / 4? No, because we bump the sample count by 2, so this is OK.
numberOfSamples = length;
bufferDone = false;
SetCallbackTime(DSPSampleCallback, 1000000.0 / (double)DAC_AUDIO_RATE, EVENT_JERRY);
// These timings are tied to NTSC, need to fix that in event.cpp/h! [FIXED]
do
{
double timeToNextEvent = GetTimeToNextEvent(EVENT_JERRY);
if (vjs.DSPEnabled)
{
if (vjs.usePipelinedDSP)
DSPExecP2(USEC_TO_RISC_CYCLES(timeToNextEvent));
else
DSPExec(USEC_TO_RISC_CYCLES(timeToNextEvent));
}
HandleNextEvent(EVENT_JERRY);
}
while (!bufferDone);
}
void MainEventLoopPass()
{
EventRecord evt;
Boolean notHandled = true;
if (!gDone) /* after cx switch back ensure not done */
{
if(WaitNextEvent(everyEvent, &evt, 1, gMouseRgn))
{
if (gMouseRgn)
SetRectRgn(gMouseRgn, evt.where.h, evt.where.v, evt.where.h + 1, evt.where.v + 1);
HandleNextEvent(&evt);
}
}
}
