void EnvelopeProcessor::writeLfoPoints(string &envState, double dStartTime, double dEndTime, double dValMin, double dValMax, LfoWaveParams &waveParams, double dPrecision, LfoWaveParams* freqModulator)
{
double dFreq, dDelay;
getFreqDelay(waveParams, dFreq, dDelay);
double dMagnitude = waveParams.strength * (1.0 - fabs(waveParams.offset));
double dOff = 0.5*(dValMax+dValMin);
double dScale = dValMax - dOff;
double dSamplerate;
double dValue = 0.0;
char buffer[BUFFER_SIZE];
EnvShape tEnvShape = eENVSHAPE_LINEAR;
switch(waveParams.shape)
{
case eWAVSHAPE_TRIANGLE :
case eWAVSHAPE_SAWUP :
case eWAVSHAPE_SAWDOWN :
tEnvShape = eENVSHAPE_LINEAR;
break;
case eWAVSHAPE_SQUARE :
case eWAVSHAPE_RANDOM :
tEnvShape = eENVSHAPE_SQUARE;
break;
case eWAVSHAPE_SINE :
case eWAVSHAPE_TRIANGLE_BEZIER :
case eWAVSHAPE_RANDOM_BEZIER :
case eWAVSHAPE_SAWUP_BEZIER :
case eWAVSHAPE_SAWDOWN_BEZIER :
tEnvShape = eENVSHAPE_BEZIER;
break;
default:
return;
break;
}
double dPhase = 0.001*dDelay*dFreq;
dPhase = dPhase - (int)(dPhase);
if(dPhase<0.0)
dPhase += 1.0;
double dDelaySec = dPhase/dFreq;
double dCarrierStart, dCarrierEnd;
bool bFlipFlop;
double dFlipFlop;
double dLength = dEndTime - dStartTime;
switch(waveParams.shape)
{
case eWAVSHAPE_SINE :
dSamplerate = dPrecision/dFreq;
dCarrierStart = WaveformGeneratorSin(0.0, dFreq, dDelaySec);
dCarrierEnd = WaveformGeneratorSin(dLength, dFreq, dDelaySec);
break;
case eWAVSHAPE_TRIANGLE :
case eWAVSHAPE_TRIANGLE_BEZIER :
dSamplerate = 0.5/dFreq;
dCarrierEnd = WaveformGeneratorTriangle(dLength, dFreq, dDelaySec, bFlipFlop);
dCarrierStart = WaveformGeneratorTriangle(0.0, dFreq, dDelaySec, bFlipFlop);
dFlipFlop = 2.0*bFlipFlop - 1.0;
break;
case eWAVSHAPE_SQUARE :
dSamplerate = 0.5/dFreq;
dCarrierEnd = WaveformGeneratorSquare(dLength, dFreq, dDelaySec, bFlipFlop);
dCarrierStart = WaveformGeneratorSquare(0.0, dFreq, dDelaySec, bFlipFlop);
dFlipFlop = -2.0*bFlipFlop + 1.0;
break;
case eWAVSHAPE_RANDOM :
case eWAVSHAPE_RANDOM_BEZIER :
dSamplerate = 1.0/dFreq;
dCarrierStart = WaveformGeneratorRandom(0.0, dFreq, dDelaySec);
dCarrierEnd = WaveformGeneratorRandom(dLength, dFreq, dDelaySec);
break;
case eWAVSHAPE_SAWUP :
case eWAVSHAPE_SAWUP_BEZIER :
dSamplerate = 1.0/dFreq;
dCarrierStart = WaveformGeneratorSawUp(0.0, dFreq, dDelaySec);
dCarrierEnd = WaveformGeneratorSawUp(dLength, dFreq, dDelaySec);
dFlipFlop = 1.0;
break;
case eWAVSHAPE_SAWDOWN :
case eWAVSHAPE_SAWDOWN_BEZIER :
dSamplerate = 1.0/dFreq;
dCarrierStart = WaveformGeneratorSawDown(0.0, dFreq, dDelaySec);
dCarrierEnd = WaveformGeneratorSawDown(dLength, dFreq, dDelaySec);
dFlipFlop = -1.0;
break;
default:
return;
break;
}
double dValueStart = waveParams.offset + dMagnitude*dCarrierStart;
dValueStart = dScale*dValueStart + dOff;
double dValueEnd = waveParams.offset + dMagnitude*dCarrierEnd;
dValueEnd = dScale*dValueEnd + dOff;
sprintf(buffer, "PT %lf %lf %d\n", dStartTime, dValueStart, tEnvShape);
envState.append(buffer);
//double dFreqMod = dFreq;
//freqModulator = new LfoWaveParams();
//freqModulator->freqHz = dFreq/100.0;
//freqModulator->strength = 0.6;
switch(waveParams.shape)
{
case eWAVSHAPE_SINE :
{
for(double t = -dDelaySec; t<dLength; t += dSamplerate)
{
if(t>0.0)
{
//if(freqModulator)
//{
// double dFreqCarrier = WaveformGeneratorSawUp(t, freqModulator->freqHz, 1000.0*freqModulator->delayMsec);
// dFreqMod = dFreq*(1.0 + freqModulator->strength * dFreqCarrier);
// // Watch out for NaNs !!!
//// dSamplerate = dPrecision/dFreqMod;
// dSamplerate = 0.01;
//}
dValue = waveParams.offset + dMagnitude*WaveformGeneratorSin(t, dFreq, dDelaySec);
//dValue = waveParams.offset + dMagnitude*WaveformGeneratorSin(t, dFreqMod, dDelaySec);
dValue = dScale*dValue + dOff;
sprintf(buffer, "PT %lf %lf %d\n", t+dStartTime, dValue, tEnvShape);
envState.append(buffer);
}
}
}
break;
case eWAVSHAPE_TRIANGLE :
case eWAVSHAPE_TRIANGLE_BEZIER :
case eWAVSHAPE_SQUARE :
{
//for(double t = dStartTime-dDelaySec; t < dEndTime; t += dSamplerate)
for(double t = -dDelaySec; t<dLength; t += dSamplerate)
{
//if(t<=dStartTime)
//continue;
if(t>0.0)
{
dValue = waveParams.offset + dMagnitude*dFlipFlop;
dValue = dScale*dValue + dOff;
sprintf(buffer, "PT %lf %lf %d\n", t+dStartTime, dValue, tEnvShape);
envState.append(buffer);
dFlipFlop = -dFlipFlop;
}
}
}
break;
case eWAVSHAPE_SAWUP :
case eWAVSHAPE_SAWDOWN :
case eWAVSHAPE_SAWUP_BEZIER :
case eWAVSHAPE_SAWDOWN_BEZIER :
{
for(double t = -dDelaySec; t<dLength; t += dSamplerate)
{
if(t>0.0)
{
for(int i=0; i<2; i++)
{
dValue = waveParams.offset + dMagnitude*dFlipFlop;
dValue = dScale*dValue + dOff;
sprintf(buffer, "PT %lf %lf %d\n", t+dStartTime, dValue, tEnvShape);
envState.append(buffer);
dFlipFlop = -dFlipFlop;
}
}
}
if(fabs(dCarrierEnd) > 0.99)
{
dValue = waveParams.offset + dMagnitude*dFlipFlop;
dValueEnd = dScale*dValue + dOff;
}
}
break;
case eWAVSHAPE_RANDOM :
case eWAVSHAPE_RANDOM_BEZIER :
{
for(double t = -dDelaySec; t<dLength; t += dSamplerate)
{
if(t>0.0)
{
dValue = waveParams.offset + dMagnitude*WaveformGeneratorRandom(t, dFreq, dDelaySec);
dValue = dScale*dValue + dOff;
sprintf(buffer, "PT %lf %lf %d\n", t+dStartTime, dValue, tEnvShape);
envState.append(buffer);
}
}
}
break;
default :
break;
}
sprintf(buffer, "PT %lf %lf %d\n", dEndTime, dValueEnd, tEnvShape);
envState.append(buffer);
}
double WaveformGeneratorSquare(double t, double dFreq, double dDelay)
{
bool bFlipFlop;
return WaveformGeneratorSquare(t, dFreq, dDelay, bFlipFlop);
}
