void EnterStage(EnvelopStage newStage)
{
FCurrentStage = newStage;
CurrentStage.Value = (int)FCurrentStage;
FCurrentSampleIndex = 0;
switch (FCurrentStage)
{
case EnvelopStage.Off:
FNextStageSampleIndex = 0;
FCurrentLevel = 0.0;
FMultiplier = 1.0;
break;
case EnvelopStage.Attack:
FNextStageSampleIndex = (int)(Math.Max(Attack.Value, 0.0f) * SampleRate);
FCurrentLevel = CMinimumLevel;
FMultiplier = CalcExpCoeff(FCurrentLevel, 1.0, FNextStageSampleIndex);
break;
case EnvelopStage.Decay:
FNextStageSampleIndex = (int)(Decay.Value * SampleRate);
FCurrentLevel = 1.0;
FMultiplier = CalcExpCoeff(FCurrentLevel, Math.Max(Math.Max(Sustain.Value, 0.0f), CMinimumLevel), FNextStageSampleIndex);
break;
case EnvelopStage.Sustain:
FCurrentLevel = Sustain.Value;
FMultiplier = 1 + Slope.Value * 0.0001;
FNextStageSampleIndex = 0;
break;
case EnvelopStage.Release:
FNextStageSampleIndex = (int)(Math.Max(Release.Value, 0.0f) * SampleRate);
// We could go from ATTACK/DECAY to RELEASE,
// so we're not changing currentLevel here.
FMultiplier = CalcExpCoeff(FCurrentLevel, CMinimumLevel, FNextStageSampleIndex);
break;
}
}
void EnterStage(EnvelopStage newStage)
{
FCurrentStage = newStage;
CurrentStage.Value = (int)FCurrentStage;
FCurrentSampleIndex = 0;
switch (FCurrentStage)
{
case EnvelopStage.Off:
FNextStageSampleIndex = 0;
FCurrentLevel = 0.0;
FMultiplier = 1.0;
break;
case EnvelopStage.Attack:
FNextStageSampleIndex = (int)(Math.Max(Attack.Value, 0.0f) * SampleRate);
FCurrentLevel = CMinimumLevel;
FMultiplier = CalcExpCoeff(FCurrentLevel, 1.0, FNextStageSampleIndex);
break;
case EnvelopStage.Decay:
FNextStageSampleIndex = (int)(Decay.Value * SampleRate);
FCurrentLevel = 1.0;
FMultiplier = CalcExpCoeff(FCurrentLevel, Math.Max(Math.Max(Sustain.Value, 0.0f), CMinimumLevel), FNextStageSampleIndex);
break;
case EnvelopStage.Sustain:
FCurrentLevel = Sustain.Value;
FMultiplier = 1 + Slope.Value * 0.0001;
FNextStageSampleIndex = 0;
break;
case EnvelopStage.Release:
FNextStageSampleIndex = (int)(Math.Max(Release.Value, 0.0f) * SampleRate);
// We could go from ATTACK/DECAY to RELEASE,
// so we're not changing currentLevel here.
FMultiplier = CalcExpCoeff(FCurrentLevel, CMinimumLevel, FNextStageSampleIndex);
break;
}
}
