private LinkedList <float[]> generateAudioSamples()
{
MyMMLSequencer seq = station.acgState.sequencer;
MyMixer mix = station.acgState.mixer;
List <MySynthesizer> sss = station.acgState.synthesizers;
if ((seq == null) || (mix == null) || (sss == null))
{
return(null);
}
mix.Reset();
for (int j = 0; j < sss.Count; j++)
{
seq.SetSynthesizer(j, sss[j], toneSet, toneMap, 0xffffffffU);
}
seq.KeyShift = clip.Key;
seq.VolumeScale = clip.Volume;
seq.TempoScale = clip.Tempo;
seq.Play(mml, 0.0f, false);
LinkedList <float[]> temp = new LinkedList <float[]>();
const int workSize = 4096;
float[] work = new float[workSize * AudioClipGeneratorState.numChannels];
bool zeroCross = false;
for (;;)
{
if (station.disabled)
{
return(null);
}
if (seq.Playing)
{
mix.Update();
}
Array.Clear(work, 0, work.Length);
int numSamples = mix.Output(work, AudioClipGeneratorState.numChannels, workSize);
if (numSamples == 0)
{
if (!zeroCross)
{
mix.Update();
continue;
}
break;
}
{
float[] block = new float[numSamples * AudioClipGeneratorState.numChannels];
Array.Copy(work, block, numSamples * AudioClipGeneratorState.numChannels);
temp.AddLast(block);
float v0 = work[(numSamples - 1) * AudioClipGeneratorState.numChannels + 0];
float v1 = work[(numSamples - 1) * AudioClipGeneratorState.numChannels + 1];
zeroCross = (v0 == 0.0f) && (v1 == 0.0f);
}
}
return(temp);
}
public AudioClip CreateAudioClip(string name, MyMMLSequence mml, List <object> toneSet, Dictionary <int, int> toneMap)
{
const int frequency = 44100;
const int numChannels = 2;
MyMixer mix = new MyMixer(frequency, true);
MySynthesizer ss0 = new MySynthesizerPM8(mix);
MyMMLSequencer seq = new MyMMLSequencer(mix.TickFrequency);
mix.TickCallback = () => seq.Tick();
seq.SetSynthesizer(0, ss0, toneSet, toneMap, 0xffffffffU);
seq.Play(mml, 0.0f, false);
int totalSamples = 0;
LinkedList <float[]> temp = new LinkedList <float[]>();
const int workSize = 4096;
float[] work = new float[workSize * numChannels];
bool first = true;
for (;;)
{
Array.Clear(work, 0, work.Length);
if (seq.Playing)
{
mix.Update();
}
int numSamples = mix.Output(work, numChannels, workSize);
if (numSamples == 0)
{
break;
}
if (first)
{
// skip leading zeros.
for (var i = 0; i < numSamples; i++)
{
if ((work[i * 2 + 0] != 0.0f) || (work[i * 2 + 1] != 0.0f))
{
first = false;
numSamples -= i;
float[] block = new float[numSamples * numChannels];
Array.Copy(work, i * 2, block, 0, numSamples * numChannels);
temp.AddLast(block);
break;
}
}
}
else
{
float[] block = new float[numSamples * numChannels];
Array.Copy(work, block, numSamples * numChannels);
temp.AddLast(block);
}
totalSamples += numSamples;
}
AudioClip clip = AudioClip.Create(name, totalSamples, numChannels, frequency, false);
int pos = 0;
foreach (var block in temp)
{
clip.SetData(block, pos);
pos += block.Length / numChannels;
}
ss0.Terminate();
mix.Terminate();
return(clip);
}
