private void AddSamplePoint(double aAddSamples, ref GeneratorEnvelope aGeneratorEnvelope)
{
aGeneratorEnvelope.samplePosition += aAddSamples * aGeneratorEnvelope.sampleSpeed;
if (aGeneratorEnvelope.soundfont.soundinfo.loopMode == true && aGeneratorEnvelope.samplePosition > aGeneratorEnvelope.soundfont.soundinfo.loopEnd)
{
// To Be Commented.
// 計算式の意味を説明する.
aGeneratorEnvelope.samplePosition = aGeneratorEnvelope.soundfont.soundinfo.loopStart + (aGeneratorEnvelope.samplePosition - aGeneratorEnvelope.soundfont.soundinfo.loopEnd);
}
}
public override AGeneratorEnvelope GetNextOscillator(ref GeneratorEnvelope aGeneratorEnvelope)
{
if (aGeneratorEnvelope.timeElapsedHold >= aGeneratorEnvelope.soundfont.ampeg.ampegHold)
{
return(GeneratorEnvelopeSet.generatorEnvelopeDecay.GetNextOscillator(ref aGeneratorEnvelope));
}
else
{
return(this);
}
}
public override AGeneratorEnvelope GetNextOscillator(ref GeneratorEnvelope aGeneratorEnvelope)
{
if (aGeneratorEnvelope.timeElapsedDelay >= aGeneratorEnvelope.soundfont.ampeg.ampegDelay)
{
return(GeneratorEnvelopeSet.generatorEnvelopeAttack.GetNextOscillator(ref aGeneratorEnvelope));
}
else
{
return(this);
}
}
public override AGeneratorEnvelope GetNextOscillator(ref GeneratorEnvelope aGeneratorEnvelope)
{
if (aGeneratorEnvelope.timeElapsedRelease >= aGeneratorEnvelope.soundfont.ampeg.ampegRelease)
{
return(GeneratorEnvelopeSet.generatorEnvelopeEnd.GetNextOscillator(ref aGeneratorEnvelope));
}
else
{
return(this);
}
}
public override AGeneratorEnvelope GetNextOscillator(ref GeneratorEnvelope aGeneratorEnvelope)
{
// リリース時間に適当に重みを掛け引く.
if (aGeneratorEnvelope.secondsSustain != 0 && aGeneratorEnvelope.timeElapsedSustain >= aGeneratorEnvelope.secondsSustain - aGeneratorEnvelope.soundfont.ampeg.ampegRelease / 3.0d)
//if( aGeneratorEnvelope.secondsSustain != 0 && timeElapsed >= aGeneratorEnvelope.secondsSustain )
{
return(GeneratorEnvelopeSet.generatorEnvelopeRelease.GetNextOscillator(ref aGeneratorEnvelope));
}
else
{
return(this);
}
}
public void GetEnvelope(double[] aBufer, double aAddSamples, ref GeneratorEnvelope aGeneratorEnvelope)
{
if (( int )aGeneratorEnvelope.samplePosition + 1 < aGeneratorEnvelope.waveform.format.samples)
{
aBufer[0] = MeanInterpolation.Calculate(aGeneratorEnvelope.waveform, aGeneratorEnvelope.samplePosition, 0);
aBufer[1] = MeanInterpolation.Calculate(aGeneratorEnvelope.waveform, aGeneratorEnvelope.samplePosition, 1);
}
// To Be Commented.
// ループエンドまでは再生する。
else if (( int )aGeneratorEnvelope.samplePosition >= aGeneratorEnvelope.soundfont.soundinfo.loopEnd && aGeneratorEnvelope.soundfont.soundinfo.loopMode == true)
{
// To Be Commented.
// なぜ"loopStart + 1"になるのか確認する.
aBufer[0] = MeanInterpolation.Calculate(aGeneratorEnvelope.waveform, aGeneratorEnvelope.samplePosition, aGeneratorEnvelope.soundfont.soundinfo.loopStart + 1, 0);
aBufer[1] = MeanInterpolation.Calculate(aGeneratorEnvelope.waveform, aGeneratorEnvelope.samplePosition, aGeneratorEnvelope.soundfont.soundinfo.loopStart + 1, 1);
}
AddSamplePoint(aAddSamples, ref aGeneratorEnvelope);
}
public override void Generate(double[] aWaveform, double aAddSamples, double aSampleSpeed, ref GeneratorEnvelope aGeneratorEnvelope)
{
GetEnvelope(aWaveform, aAddSamples, ref aGeneratorEnvelope);
double lEnvelope = 1.0f;
aWaveform[0] *= lEnvelope;
aWaveform[1] *= lEnvelope;
aGeneratorEnvelope.timeElapsedHold += aSampleSpeed;
aGeneratorEnvelope.timeElapsedSum += aSampleSpeed;
}
public override AGeneratorEnvelope GetNextOscillator(ref GeneratorEnvelope aGeneratorEnvelope)
{
return(this);
}
public override void Generate(double[] aBuffer, double aAddSamples, double aSampleSpeed, ref GeneratorEnvelope aGeneratorEnvelope)
{
aBuffer[0] = 0;
aBuffer[1] = 0;
}
public override void Generate(double[] aWaveform, double aAddSamples, double aSampleSpeed, ref GeneratorEnvelope aGeneratorEnvelope)
{
GetEnvelope(aWaveform, aAddSamples, ref aGeneratorEnvelope);
double lEnvelope = aGeneratorEnvelope.soundfont.ampeg.ampegSustain;
aWaveform[0] *= lEnvelope;
aWaveform[1] *= lEnvelope;
aGeneratorEnvelope.timeElapsedSustain += aSampleSpeed;
aGeneratorEnvelope.timeElapsedSum += aSampleSpeed;
//elapsed += 1.0d;
//elapsedSum += 1.0d;
}
public override void Generate(double[] aBuffer, double aAddSamples, double aSampleSpeed, ref GeneratorEnvelope aGeneratorEnvelope)
{
aBuffer[0] = 0;
aBuffer[1] = 0;
aGeneratorEnvelope.timeElapsedDelay += aSampleSpeed;
aGeneratorEnvelope.timeElapsedSum += aSampleSpeed;
}
public abstract AGeneratorEnvelope GetNextOscillator(ref GeneratorEnvelope aGeneratorEnvelope);
public abstract void Generate(double[] aBuffer, double aAddSamples, double aSampleSpeed, ref GeneratorEnvelope aGeneratorEnvelope);
public MidiOscillator(byte aNote, byte aInstrument, byte aVelocity, SoundfontBase aSoundfont, ref MidiVolume aMidiVolume, ref MidiPitch aMidiPitch, double aSecondsSustain = 0.0d)
{
generatorEnvelope = new GeneratorEnvelope(aSoundfont, aVelocity, aSecondsSustain);
filterVibrato = new FilterVibrato(ref aMidiPitch);
generatorPortament = new GeneratorPortament(aNote, aSoundfont.soundinfo.GetPitch());
}
public override void Generate(double[] aBuffer, double aAddSamples, double aSampleSpeed, ref GeneratorEnvelope aGeneratorEnvelope)
{
GetEnvelope(aBuffer, aAddSamples, ref aGeneratorEnvelope);
double lEnvelope = aGeneratorEnvelope.soundfont.ampeg.ampegStart + (1.0f - aGeneratorEnvelope.soundfont.ampeg.ampegStart) * aGeneratorEnvelope.timeElapsedAttack / aGeneratorEnvelope.soundfont.ampeg.ampegAttack;
aBuffer[0] *= lEnvelope;
aBuffer[1] *= lEnvelope;
aGeneratorEnvelope.timeElapsedAttack += aSampleSpeed;
aGeneratorEnvelope.timeElapsedSum += aSampleSpeed;
}