public void RemoveFromRegistry(Voice voice)
{
VoiceNode node = registry[voice.VoiceParams.channel, voice.VoiceParams.note];
if (node == null)
return;
if (node.Value == voice)
{
registry[voice.VoiceParams.channel, voice.VoiceParams.note] = node.Next;
vnodes.Push(node);
return;
}
else
{
VoiceNode node2 = node;
node = node.Next;
while (node != null)
{
if (node.Value == voice)
{
node2.Next = node.Next;
vnodes.Push(node);
return;
}
node2 = node;
node = node.Next;
}
}
}
public void AddToRegistry(Voice voice)
{
VoiceNode node = vnodes.Pop();
node.Value = voice;
node.Next = registry[voice.VoiceParams.channel, voice.VoiceParams.note];
registry[voice.VoiceParams.channel, voice.VoiceParams.note] = node;
}
//--Public Methods
public VoiceManager(int voiceCount)
{
stealingMethod = VoiceStealEnum.Quietest;
polyphony = voiceCount;
//initialize voice containers
voicePool = new Voice[voiceCount];
VoiceNode[] nodes = new VoiceNode[voiceCount];
for (int x = 0; x < voicePool.Length; x++)
{
voicePool[x] = new Voice();
nodes[x] = new VoiceNode();
}
vnodes = new Stack<VoiceNode>(nodes);
//free voice list
freeVoices = new LinkedList<Voice>(voicePool);
activeVoices = new LinkedList<Voice>();
registry = new VoiceNode[Synthesizer.DefaultChannelCount, Synthesizer.DefaultKeyCount];
}
/// <summary>
/// Starts a voice with the given key and velocity.
/// </summary>
/// <param name="channel">The midi channel this voice is on.</param>
/// <param name="note">The key the voice will play in.</param>
/// <param name="velocity">The volume of the voice.</param>
public void NoteOn(int channel, int note, int velocity)
{
// Get the correct instrument depending if it is a drum or not
SynthParameters sChan = synthChannels[channel];
// Debug.LogFormat("Patch {0} {1}", sChan.bankSelect, sChan.program);
Patch inst = bank.GetPatch(sChan.bankSelect, sChan.program);
if (inst == null)
{
return;
}
// A NoteOn can trigger multiple voices via layers
int layerCount;
if (inst is MultiPatch)
{
layerCount = ((MultiPatch)inst).FindPatches(channel, note, velocity, layerList);
}
else
{
layerCount = 1;
layerList[0] = inst;
}
// If a key with the same note value exists, stop it
if (voiceManager.registry[channel, note] != null)
{
VoiceManager.VoiceNode node = voiceManager.registry[channel, note];
while (node != null)
{
node.Value.Stop();
node = node.Next;
}
voiceManager.RemoveFromRegistry(channel, note);
}
// Check exclusive groups
for (int x = 0; x < layerCount; x++)
{
bool notseen = true;
for (int i = x - 1; i >= 0; i--)
{
if (layerList[x].ExclusiveGroupTarget == layerList[i].ExclusiveGroupTarget)
{
notseen = false;
break;
}
}
if (layerList[x].ExclusiveGroupTarget != 0 && notseen)
{
LinkedListNode <Voice> node = voiceManager.activeVoices.First;
while (node != null)
{
if (layerList[x].ExclusiveGroupTarget == node.Value.Patch.ExclusiveGroup)
{
node.Value.Stop();
voiceManager.RemoveFromRegistry(node.Value);
}
node = node.Next;
}
}
}
// Assign a voice to each layer
for (int x = 0; x < layerCount; x++)
{
Voice voice = voiceManager.GetFreeVoice();
if (voice == null)// out of voices and skipping is enabled
{
break;
}
voice.Configure(channel, note, velocity, layerList[x], synthChannels[channel]);
voiceManager.AddToRegistry(voice);
voiceManager.activeVoices.AddLast(voice);
voice.Start();
}
// Clear layer list
for (int x = 0; x < layerCount; x++)
{
layerList[x] = null;
}
}