internal static void SetPosition(uint p)
{
bool pause = State == PlayerState.Playing;
if (pause)
{
Pause();
}
position = p;
for (int i = NumTracks - 1; i >= 0; i--)
{
var track = tracks[i];
track.Init();
uint elapsed = 0;
while (!track.Stopped)
{
ExecuteNext(i);
// elapsed == 400, delay == 4, p == 402
if (elapsed <= p && elapsed + track.Delay > p)
{
track.Delay -= (byte)(p - elapsed);
SoundMixer.StopAllChannels();
break;
}
elapsed += track.Delay;
track.Delay = 0;
}
}
if (pause)
{
Pause();
}
}
internal static void Stop()
{
if (State == PlayerState.Stopped)
{
return;
}
State = PlayerState.Stopped;
SoundMixer.StopAllChannels();
}
static void Tick()
{
time.Start();
while (State != PlayerState.ShutDown)
{
if (State == PlayerState.Playing)
{
// Do Song Tick
tempoStack += Tempo;
int wait = Engine.GetTempoWait();
while (tempoStack >= wait)
{
tempoStack -= wait;
bool allDone = true;
for (int i = 0; i < NumTracks; i++)
{
Track track = tracks[i];
if (!track.Stopped || !SoundMixer.AllDead(i))
{
allDone = false;
}
track.Tick();
bool update = false;
while (track.Delay == 0 && !track.Stopped)
{
if (ExecuteNext(i))
{
update = true;
}
}
if (update || track.MODDepth > 0)
{
SoundMixer.UpdateChannels(i, track.GetVolume(), track.GetPan(), track.GetPitch());
}
}
position++;
if (allDone)
{
Stop();
SongEnded?.Invoke();
}
}
}
// Do Instrument Tick
if (State != PlayerState.Paused)
{
SoundMixer.Process();
}
// Wait for next frame
time.Wait();
}
time.Stop();
}
internal static void GetSongState(UI.TrackInfo info)
{
info.Tempo = Tempo; info.Position = position;
for (int i = 0; i < NumTracks; i++)
{
info.Positions[i] = Song.Commands[i][tracks[i].CommandIndex].Offset;
info.Delays[i] = tracks[i].Delay;
info.Voices[i] = tracks[i].Voice;
info.Mods[i] = tracks[i].MODDepth;
info.Types[i] = Song.VoiceTable[tracks[i].Voice].ToString();
info.Volumes[i] = tracks[i].GetVolume();
info.Pitches[i] = tracks[i].GetPitch();
info.Pans[i] = tracks[i].GetPan();
var channels = SoundMixer.GetChannels(i);
bool none = channels.Length == 0;
info.Lefts[i] = none ? 0 : channels.Select(c => c.GetVolume().FromLeftVol).Max();
info.Rights[i] = none ? 0 : channels.Select(c => c.GetVolume().FromRightVol).Max();
info.Notes[i] = none ? new sbyte[0] : channels.Where(c => c.State < ADSRState.Releasing).Select(c => c.Note.OriginalKey).Distinct().ToArray();
}
}
internal static void SetSong(Song song)
{
Song = song;
VoiceTable.ClearCache();
SoundMixer.Init(song.GetReverb());
}
// Returns a bool which indicates whether the track needs to update volume, pan, or pitch
static bool ExecuteNext(int i)
{
bool update = false;
var track = tracks[i];
var e = Song.Commands[i][track.CommandIndex];
if (e.Command is GoToCommand goTo)
{
int gotoCmd = Song.Commands[i].FindIndex(c => c.Offset == goTo.Offset);
if (longestTrack == i)
{
position = Song.Commands[i][gotoCmd].AbsoluteTicks - 1;
}
track.CommandIndex = gotoCmd - 1; // -1 for incoming ++
}
else if (e.Command is CallCommand patt)
{
int callCmd = Song.Commands[i].FindIndex(c => c.Offset == patt.Offset);
track.EndOfPattern = track.CommandIndex;
track.CommandIndex = callCmd - 1; // -1 for incoming ++
}
else if (e.Command is ReturnCommand)
{
if (track.EndOfPattern != 0)
{
track.CommandIndex = track.EndOfPattern;
track.EndOfPattern = 0;
}
}
else if (e.Command is FinishCommand)
{
track.Stopped = true;
SoundMixer.ReleaseChannels(i, -1);
}
else if (e.Command is PriorityCommand prio)
{
track.Priority = prio.Priority;
} // TODO: Update channel priorities
else if (e.Command is TempoCommand tempo)
{
Tempo = tempo.Tempo;
}
else if (e.Command is KeyShiftCommand keysh)
{
track.KeyShift = keysh.Shift;
}
else if (e.Command is RestCommand w)
{
track.Delay = w.Rest;
}
else if (e.Command is VoiceCommand voice)
{
track.Voice = voice.Voice; track.Ready = true;
}
else if (e.Command is VolumeCommand vol)
{
track.Volume = vol.Volume; update = true;
}
else if (e.Command is PanpotCommand pan)
{
track.Pan = pan.Panpot; update = true;
}
else if (e.Command is BendCommand bend)
{
track.Bend = bend.Bend; update = true;
}
else if (e.Command is BendRangeCommand bendr)
{
track.BendRange = bendr.Range; update = true;
}
else if (e.Command is LFOSpeedCommand lfos)
{
track.LFOSpeed = lfos.Speed; track.LFOPhase = track.LFODelayCount = 0; update = true;
}
else if (e.Command is LFODelayCommand lfodl)
{
track.LFODelay = lfodl.Delay; track.LFOPhase = track.LFODelayCount = 0; update = true;
}
else if (e.Command is ModDepthCommand mod)
{
track.MODDepth = mod.Depth; update = true;
}
else if (e.Command is ModTypeCommand modt)
{
track.MODType = (MODType)modt.Type; update = true;
}
else if (e.Command is TuneCommand tune)
{
track.Tune = tune.Tune; update = true;
}
else if (e.Command is LibraryCommand xcmd)
{
if (xcmd.Command == 8)
{
track.EchoVolume = xcmd.Argument;
}
else if (xcmd.Command == 9)
{
track.EchoLength = xcmd.Argument;
}
}
else if (e.Command is EndOfTieCommand eot)
{
if (eot.Note == -1)
{
SoundMixer.ReleaseChannels(i, track.PrevNote);
}
else
{
sbyte note = (sbyte)(eot.Note + track.KeyShift).Clamp(0, 127);
SoundMixer.ReleaseChannels(i, note);
}
}
else if (e.Command is NoteCommand n)
{
if (e.Command is MLSSNoteCommand mln)
{
var mlTrack = (MLSSTrack)track;
mlTrack.Delay += (byte)mln.Duration;
PlayNote(track, mln.Note, 0x7F, mln.Duration);
}
else if (e.Command is M4ANoteCommand m4an)
{
PlayNote(track, m4an.Note, m4an.Velocity, m4an.Duration);
}
}
else if (e.Command is FreeNoteCommand ext)
{
var mlTrack = (MLSSTrack)track;
mlTrack.Delay += ext.Extension;
sbyte note = (sbyte)(ext.Note - 0x80);
PlayNote(mlTrack, note, 0x7F, ext.Extension);
}
if (!track.Stopped)
{
track.CommandIndex++;
}
return(update);
}
internal static void PlayNote(Track track, sbyte note, byte velocity, int duration)
{
int shift = note + track.KeyShift;
note = (sbyte)(shift.Clamp(0, 127));
track.PrevNote = note;
if (!track.Ready)
{
return;
}
SVoice voice = Song.VoiceTable.GetVoiceFromNote(track.Voice, note, out bool fromDrum);
var owner = track.Index;
var aNote = new Note {
Duration = duration, Velocity = velocity, OriginalKey = note, Key = fromDrum ? voice.Voice.GetRootNote() : note
};
if (voice.Voice is M4AVoice m4avoice)
{
switch (m4avoice.Type)
{
case 0x0:
case 0x8:
SoundMixer.NewDSNote(owner, m4avoice.ADSR, aNote,
track.GetVolume(), track.GetPan(), track.GetPitch(),
m4avoice.Type == 0x8, ((M4ASDirect)voice).Sample.GetSample(), tracks);
break;
case 0x1:
case 0x9:
SoundMixer.NewGBNote(owner, m4avoice.ADSR, aNote,
track.GetVolume(), track.GetPan(), track.GetPitch(),
GBType.Square1, m4avoice.SquarePattern);
break;
case 0x2:
case 0xA:
SoundMixer.NewGBNote(owner, m4avoice.ADSR, aNote,
track.GetVolume(), track.GetPan(), track.GetPitch(),
GBType.Square2, m4avoice.SquarePattern);
break;
case 0x3:
case 0xB:
SoundMixer.NewGBNote(owner, m4avoice.ADSR, aNote,
track.GetVolume(), track.GetPan(), track.GetPitch(),
GBType.Wave, ((M4ASWave)voice).sample);
break;
case 0x4:
case 0xC:
SoundMixer.NewGBNote(owner, m4avoice.ADSR, aNote,
track.GetVolume(), track.GetPan(), track.GetPitch(),
GBType.Noise, m4avoice.NoisePattern);
break;
}
}
else if (voice.Voice is MLSSVoice mlssvoice)
{
MLSSVoiceEntry entry; bool bFixed = false; Sample sample = null;
try
{
entry = mlssvoice.GetEntryFromNote(note);
bFixed = entry.IsFixedFrequency == 0x80;
sample = ((MLSSVoiceTable)Song.VoiceTable).Samples[entry.Sample].GetSample();
}
catch { System.Console.WriteLine("Track {0} tried to play a bad note: {1}", owner + 1, note); }
finally
{
if (sample != null)
{
SoundMixer.NewDSNote(owner, new ADSR {
A = 0xFF, S = 0xFF
}, aNote,
track.GetVolume(), track.GetPan(), track.GetPitch(),
bFixed, sample, tracks);
}
}
}
}