float soundProcessor::Process(float Sample)
{
// push input sample up input buffer
m_pX[m_Ix] = Sample;
float y = CoreProcess();
// push output sample up output buffer
m_pY[m_Iy] = y;
// increment pointers
m_Ix = (m_Ix + 1) % BUF_MASK;
m_Iy = (m_Iy + 1) % BUF_MASK;
return y;
}
void SRS_Source_Out::Process(void* pSamples, int sampleBytes, int sampleRate, int countChans){
// Will NOT touch Audio in these cases...
if (sampleRate < 0) return;
if (countChans != 2) return;
if (DidAPIInit == false) APIInit(sampleRate, countChans);
if (DidAPIInit == false) return; // Still not ready?
int tFrames = sampleBytes/(sizeof(int16_t)*countChans);
if (Framesize != tFrames){
Framesize = tFrames;
if ((Framesize%256 != 0) && (UseCache == false)){
SRS_LOG("Framesize of %d forcing Cache!!", Framesize);
InitCaching();
}
}
int16_t FadeHold[512]; // 256*stereo
bool tWantProcess = WillProcess();
if (tWantProcess == false){ // Turning off...
if (ProcState == PROCST_OFF) return; // Already off...
else if (ProcState == PROCST_IN){ // Was fading in, fade out...
ProcState = PROCST_OUT;
ProcTrack = PROC_FADELEN-ProcTrack;
} else if (ProcState == PROCST_ON){ // start fade out..
ProcState = PROCST_OUT;
ProcTrack = 0;
}
// else already fading out - keep going...
} else {
if (ProcState == PROCST_OFF){
ProcState = PROCST_IN;
ProcTrack = 0;
if (UseCache == true) InitCaching(); // Caching? Reset...
} else if (ProcState == PROCST_OUT){
ProcState = PROCST_IN;
ProcTrack = PROC_FADELEN-ProcTrack;
}
}
int16_t* pSampsIn = (int16_t*)pSamples;
// Fade In/Out... may return early...
while ((ProcState == PROCST_OUT) || (ProcState == PROCST_IN)){
SRS_LOG("Fading %d - %d", ProcState, ProcTrack);
int tProcLen = (tFrames<256)?tFrames:256; // How many samples to process?
tFrames -= tProcLen; // Pull that many off...
int16_t* pSampsOrig = FadeHold;
memcpy(FadeHold, pSampsIn, tProcLen*sizeof(int16_t)*countChans); // Back up data for fade...
CoreProcess(pSampsIn, tProcLen); // Process...
int tProcRemain = PROC_FADELEN-ProcTrack; // How much can we process?
int tDoProc = (tProcRemain<tProcLen)?tProcRemain:tProcLen; // How many will we process?
int tDoPass = (tProcLen>tDoProc)?(tProcLen-tDoProc):0; // How many will we fill from history/processed?
int32_t tTween = ProcTrack*gProcStep; // Where we are in the fade...
ProcTrack += tDoProc;
if (ProcState == PROCST_OUT){ // Fading out...
FadeLoop_2Chan(pSampsIn, pSampsOrig, pSampsIn, tTween, gProcStep, tDoProc);
pSampsIn += 2*tDoProc;
pSampsOrig += 2*tDoProc;
if (tDoPass > 0){ // We over processed - so restore from the originals we saved...
memcpy(pSampsIn, pSampsOrig, tDoPass*sizeof(int16_t)*countChans);
pSampsIn += 2*tDoPass;
}
if (ProcTrack >= PROC_FADELEN){
ProcState = PROCST_OFF; // Done!!!
return;
}
} else { // Fading in...
tTween -= PROC_DELAYIN*gProcStep; // Adjust for the fade-in delay...
FadeLoop_2Chan(pSampsIn, pSampsIn, pSampsOrig, tTween, gProcStep, tDoProc);
pSampsIn += 2*tProcLen; // Anything past tDoProc until tProcLen will be what we processed... no 'pass' phase...
if (ProcTrack >= PROC_FADELEN){
ProcState = PROCST_ON; // Done!!!
}
}
if (tFrames <= 0) break;
}
if (tFrames > 0) CoreProcess(pSampsIn, tFrames);
}