void OnAudioFilterRead(float[] data, int channel)
{
Debug.Assert(this.channel == channel);
int count = 0;
while (count < data.Length)
{
if (currentBuffer == null || bufferHead >= currentBuffer.Length)
{
sequencer.FillMidiEventQueue();
synthesizer.GetNext();
currentBuffer = synthesizer.WorkingBuffer;
bufferHead = 0;
}
var length = Mathf.Min(currentBuffer.Length - bufferHead, data.Length - count);
System.Array.Copy(currentBuffer, bufferHead, data, count, length);
bufferHead += length;
count += length;
}
}
public SynthPlayer()
{
Logger.Debug("Initializing player");
State = SynthPlayerState.Stopped;
OnPlayerStateChanged(new PlayerStateChangedEventArgs(State));
Logger.Debug("Opening output");
Output = Platform.Platform.CreateOutput();
Logger.Debug("Creating synthesizer");
Synth = new Synthesizer(Output.SampleRate, SynthConstants.AudioChannels, 441, 3, 100);
Sequencer = new MidiFileSequencer(Synth);
Sequencer.AddFinishedListener(Output.SequencerFinished);
Output.Finished += () =>
{
// stop everything
Stop();
Logger.Debug("Finished playback");
OnFinished();
};
Output.SampleRequest += () =>
{
// synthesize buffer
Sequencer.FillMidiEventQueue();
Synth.Synthesize();
// send it to output
Output.AddSamples(Synth.SampleBuffer);
};
Output.PositionChanged += pos =>
{
// log position
FirePositionChanged(pos);
};
Output.Open();
}
public int Read(byte[] buffer, int offset, int count)
{
if (state != PlayerState.Playing)
{
if (state == PlayerState.Stopped)
{
return(0);
}
else
{
Array.Clear(buffer, offset, buffer.Length - offset);
return(count);
}
}
int[] ccList = new int[16];
while (circularBuffer.Count < count)
{
lock (lockObj)
{
if (msgQueue.Count > 0)
{
while (msgQueue.Count > 0)
{
processMessage(msgQueue.Dequeue());
}
}
mseq.FillMidiEventQueue();
if (UpdateMidiControllers != null)
{
IEnumerator <MidiMessage> mmEnum = synth.MidiMessageEnumerator;
while (mmEnum.MoveNext())
{
if (mmEnum.Current.command == 0xC0)
{//program change
ccList[mmEnum.Current.channel] |= 0x1;
}
else if (mmEnum.Current.command == 0xE0)
{//pitch bend
ccList[mmEnum.Current.channel] |= 0x2;
}
else if (mmEnum.Current.command == 0xB0)
{
switch (mmEnum.Current.data1)
{
case 0x07: //vol
ccList[mmEnum.Current.channel] |= 0x4;
break;
case 0x0A: //pan
ccList[mmEnum.Current.channel] |= 0x8;
break;
case 0x0B: //exp
ccList[mmEnum.Current.channel] |= 0x10;
break;
case 0x40: //hold
ccList[mmEnum.Current.channel] |= 0x20;
break;
default:
break;
}
}
}
}
synth.GetNext(sbuff);
circularBuffer.Write(sbuff, 0, sbuff.Length);
}
}
if (TimeUpdate != null)
{
TimeUpdate(mseq.CurrentTime, mseq.EndTime, synth.ActiveVoices);
}
if (UpdateMidiControllers != null)
{
UpdateMidiControllers(ccList);
}
return(circularBuffer.Read(buffer, offset, count));
}