public void CombineTracks()
{
var finalTrack = MergeTracks();
var absEvents = new MidiEvent[Tracks.Length][];
for (int i = 0; i < Tracks.Length; i++)
{
absEvents[i] = new MidiEvent[Tracks[i].MidiEvents.Length];
var totalDeltaTime = 0;
for (int j = 0; j < Tracks[i].MidiEvents.Length; j++)
{
absEvents[i][j] = Tracks[i].MidiEvents[j];
totalDeltaTime += absEvents[i][j].DeltaTime;
absEvents[i][j].DeltaTime = totalDeltaTime;
}
}
var eventCount = 0;
var delta = 0;
var nextdelta = int.MaxValue;
var counters = new int[absEvents.Length];
TypeUtils.ClearIntArray(counters);
while (eventCount < finalTrack.MidiEvents.Length)
{
for (int x = 0; x < absEvents.Length; x++)
{
while (counters[x] < absEvents[x].Length && absEvents[x][counters[x]].DeltaTime == delta)
{
finalTrack.MidiEvents[eventCount] = absEvents[x][counters[x]];
eventCount++;
counters[x]++;
}
if (counters[x] < absEvents[x].Length && absEvents[x][counters[x]].DeltaTime < nextdelta)
{
nextdelta = absEvents[x][counters[x]].DeltaTime;
}
}
delta = nextdelta;
nextdelta = int.MaxValue;
}
finalTrack.EndTime = finalTrack.MidiEvents[finalTrack.MidiEvents.Length - 1].DeltaTime;
var deltaDiff = 0;
for (int x = 0; x < finalTrack.MidiEvents.Length; x++)
{
var oldTime = finalTrack.MidiEvents[x].DeltaTime;
finalTrack.MidiEvents[x].DeltaTime -= deltaDiff;
deltaDiff = oldTime;
}
Tracks = new MidiTrack[] { finalTrack };
TrackFormat = MidiTrackFormat.SingleTrack;
}
private void FillWorkingBuffer()
{
lock (this)
{
/*Break the process loop into sections representing the smallest timeframe before the midi controls need to be updated
* the bigger the timeframe the more efficent the process is, but playback quality will be reduced.*/
var sampleIndex = 0;
var anySolo = _isAnySolo;
for (int x = 0; x < MicroBufferCount; x++)
{
if (_midiEventQueue.Length > 0)
{
for (int i = 0; i < _midiEventCounts[x]; i++)
{
var m = _midiEventQueue.RemoveLast();
if (m.IsMetronome)
{
NoteOff(_metronomeChannel, 37);
NoteOn(_metronomeChannel, 37, 95);
}
else
{
ProcessMidiMessage(m.Event);
}
}
}
//voice processing loop
var node = _voiceManager.ActiveVoices.First; //node used to traverse the active voices
while (node != null)
{
var channel = node.Value.VoiceParams.Channel;
// channel is muted if it is either explicitley muted, or another channel is set to solo but not this one.
var isChannelMuted = _mutedChannels.ContainsKey(channel) ||
(anySolo && !_soloChannels.ContainsKey(channel));
node.Value.Process(sampleIndex, sampleIndex + MicroBufferSize * SynthConstants.AudioChannels, isChannelMuted);
//if an active voice has stopped remove it from the list
if (node.Value.VoiceParams.State == VoiceStateEnum.Stopped)
{
var delnode = node; //node used to remove inactive voices
node = node.Next;
_voiceManager.RemoveVoiceFromRegistry(delnode.Value);
_voiceManager.ActiveVoices.Remove(delnode);
_voiceManager.FreeVoices.AddFirst(delnode.Value);
}
else
{
node = node.Next;
}
}
sampleIndex += MicroBufferSize * SynthConstants.AudioChannels;
}
TypeUtils.ClearIntArray(_midiEventCounts);
}
}
private void FillWorkingBuffer()
{
/*Break the process loop into sections representing the smallest timeframe before the midi controls need to be updated
* the bigger the timeframe the more efficent the process is, but playback quality will be reduced.*/
var sampleIndex = 0;
for (int x = 0; x < MicroBufferCount; x++)
{
if (MidiEventQueue.Length > 0)
{
for (int i = 0; i < MidiEventCounts[x]; i++)
{
var m = MidiEventQueue.RemoveLast();
ProcessMidiMessage(m.Event);
}
}
//voice processing loop
var node = _voiceManager.ActiveVoices.First; //node used to traverse the active voices
while (node != null)
{
node.Value.Process(sampleIndex, sampleIndex + MicroBufferSize * AudioChannels);
//if an active voice has stopped remove it from the list
if (node.Value.VoiceParams.State == VoiceStateEnum.Stopped)
{
var delnode = node; //node used to remove inactive voices
node = node.Next;
_voiceManager.RemoveVoiceFromRegistry(delnode.Value);
_voiceManager.ActiveVoices.Remove(delnode);
_voiceManager.FreeVoices.AddFirst(delnode.Value);
}
else
{
node = node.Next;
}
}
sampleIndex += MicroBufferSize * AudioChannels;
}
TypeUtils.ClearIntArray(MidiEventCounts);
}