private void LoadFilter(Sf2Region region)
{
fltr = new FilterDescriptor();
fltr.FilterMethod = FilterTypeEnum.BiquadLowpass;
fltr.CutOff = (float)SynthHelper.KeyToFrequency(region.Generators[(int)GeneratorEnum.InitialFilterCutoffFrequency] / 100.0, 69);
fltr.Resonance = (float)SynthHelper.DBtoLinear(region.Generators[(int)GeneratorEnum.InitialFilterQ] / 10.0);
}
public override void Process(VoiceParameters voiceparams, int startIndex, int endIndex, bool isMuted)
{
//--Base pitch calculation
var basePitchFrequency = SynthHelper.CentsToPitch(voiceparams.SynthParams.CurrentPitch) * gen.Frequency;
var pitchWithBend = basePitchFrequency * SynthHelper.CentsToPitch(voiceparams.PitchOffset);
var basePitch = pitchWithBend / voiceparams.SynthParams.Synth.SampleRate;
float baseVolume = isMuted ? 0 : voiceparams.SynthParams.Synth.MasterVolume * voiceparams.SynthParams.CurrentVolume * SynthConstants.DefaultMixGain * voiceparams.SynthParams.MixVolume;
//--Main Loop
for (int x = startIndex; x < endIndex; x += SynthConstants.DefaultBlockSize * SynthConstants.AudioChannels)
{
voiceparams.Envelopes[0].Increment(SynthConstants.DefaultBlockSize);
voiceparams.Envelopes[1].Increment(SynthConstants.DefaultBlockSize);
voiceparams.Lfos[0].Increment(SynthConstants.DefaultBlockSize);
voiceparams.Lfos[1].Increment(SynthConstants.DefaultBlockSize);
//--Calculate pitch and get next block of samples
gen.GetValues(voiceparams.GeneratorParams[0], voiceparams.BlockBuffer, basePitch *
SynthHelper.CentsToPitch((int)(voiceparams.Envelopes[0].Value * modEnvToPitch +
voiceparams.Lfos[0].Value * modLfoToPitch + voiceparams.Lfos[1].Value * vibLfoToPitch)));
//--Filter
if (voiceparams.Filters[0].Enabled)
{
double centsFc = voiceparams.PData[0].Int1 + voiceparams.Lfos[0].Value * modLfoToFilterFc + voiceparams.Envelopes[0].Value * modEnvToFilterFc;
if (centsFc > 13500)
{
centsFc = 13500;
}
voiceparams.Filters[0].CutOff = SynthHelper.KeyToFrequency(centsFc / 100.0, 69);
if (voiceparams.Filters[0].CoeffNeedsUpdating)
{
voiceparams.Filters[0].ApplyFilterInterp(voiceparams.BlockBuffer, voiceparams.SynthParams.Synth.SampleRate);
}
else
{
voiceparams.Filters[0].ApplyFilter(voiceparams.BlockBuffer);
}
}
//--Volume calculation
float volume = (float)SynthHelper.DBtoLinear(voiceparams.VolOffset + voiceparams.Envelopes[1].Value + voiceparams.Lfos[0].Value * modLfoToVolume) * baseVolume;
//--Mix block based on number of channels
if (SynthConstants.AudioChannels == 2)
{
voiceparams.MixMonoToStereoInterp(x, volume * pan.Left * voiceparams.SynthParams.CurrentPan.Left, volume * pan.Right * voiceparams.SynthParams.CurrentPan.Right);
}
else
{
voiceparams.MixMonoToMonoInterp(x, volume);
}
//--Check and end early if necessary
if ((voiceparams.Envelopes[1].CurrentStage > EnvelopeState.Hold && volume <= SynthConstants.NonAudible) || voiceparams.GeneratorParams[0].CurrentState == GeneratorState.Finished)
{
voiceparams.State = VoiceStateEnum.Stopped;
return;
}
}
}
public override void Process(VoiceParameters voiceparams, int startIndex, int endIndex)
{
//--Base pitch calculation
double basePitch = SynthHelper.CentsToPitch(voiceparams.pitchOffset + voiceparams.synth.totalPitch[voiceparams.channel])
* voiceparams.generators[0].Frequency / voiceparams.synth.SampleRate;
//--Base volume calculation
//float baseVolume = voiceparams.volOffset * voiceparams.synth.totalVolume[voiceparams.channel];
//--Main Loop
for (int x = startIndex; x < endIndex; x += Synthesizer.DefaultBlockSize * voiceparams.synth.AudioChannels)
{
voiceparams.envelopes[0].Increment(Synthesizer.DefaultBlockSize);
voiceparams.envelopes[1].Increment(Synthesizer.DefaultBlockSize);
voiceparams.lfos[0].Increment(Synthesizer.DefaultBlockSize);
voiceparams.lfos[1].Increment(Synthesizer.DefaultBlockSize);
//--Calculate pitch and get next block of samples
voiceparams.generators[0].GetValues(voiceparams.generatorParams[0], voiceparams.blockBuffer, basePitch *
SynthHelper.CentsToPitch((int)(voiceparams.envelopes[0].Value * modEnvToPitch +
voiceparams.lfos[0].Value * modLfoToPitch + voiceparams.lfos[1].Value * vibLfoToPitch)));
//--Filter
if (voiceparams.filters[0].Enabled)
{
double centsFc = iniFilterFc + voiceparams.lfos[0].Value * modLfoToFilterFc + voiceparams.envelopes[0].Value * modEnvToFilterFc;
if (centsFc > 13500)
{
centsFc = 13500;
}
voiceparams.filters[0].UpdateCoefficients(SynthHelper.KeyToFrequency(centsFc / 100.0, 69) / voiceparams.synth.SampleRate, filterQ);
voiceparams.filters[0].ApplyFilter(voiceparams.blockBuffer);
}
//--Volume calculation
float volume = (float)SynthHelper.DBtoLinear(voiceparams.volOffset + voiceparams.lfos[0].Value * modLfoToVolume) * voiceparams.envelopes[1].Value * voiceparams.synth.totalVolume[voiceparams.channel] * voiceparams.synth.MixGain;
//--Mix block based on number of channels
if (voiceparams.synth.AudioChannels == 2)
{
SynthHelper.MixMonoToStereoInterpolation(x,
volume * pan.Left * voiceparams.synth.panPositions[voiceparams.channel].Left,
volume * pan.Right * voiceparams.synth.panPositions[voiceparams.channel].Right,
voiceparams);
}
else
{
SynthHelper.MixMonoToMonoInterpolation(x, volume, voiceparams);
}
//--Check and end early if necessary
if ((voiceparams.envelopes[1].CurrentState > EnvelopeStateEnum.Hold && volume <= Synthesizer.NonAudible) || voiceparams.generatorParams[0].currentState == GeneratorStateEnum.Finished)
{
voiceparams.state = VoiceStateEnum.Stopped;
return;
}
}
}