public void WriteMusic(MidiMusic music)
{
WriteHeader(music.Format, (short)music.Tracks.Count, music.DeltaTimeSpec);
foreach (var track in music.Tracks)
{
WriteTrack(track);
}
}
public void Read(Stream stream)
{
this.stream = stream;
data = new MidiMusic();
try {
DoParse();
} finally {
this.stream = null;
}
}
public MidiPlayer(MidiMusic music, IMidiOutput output, IMidiTimeManager timeManager)
{
if (music == null)
{
throw new ArgumentNullException("music");
}
if (output == null)
{
throw new ArgumentNullException("output");
}
if (timeManager == null)
{
throw new ArgumentNullException("timeManager");
}
this.output = output;
player = new MidiSyncPlayer(music, timeManager);
EventReceived += (m) => {
switch (m.EventType)
{
case MidiEvent.NoteOn:
case MidiEvent.NoteOff:
if (channel_mask != null && channel_mask [m.Channel])
{
return; // ignore messages for the masked channel.
}
goto default;
case MidiEvent.SysEx1:
case MidiEvent.SysEx2:
if (buffer.Length <= m.Data.Length)
{
buffer = new byte [buffer.Length * 2];
}
buffer [0] = m.StatusByte;
Array.Copy(m.Data, 0, buffer, 1, m.Data.Length);
output.Send(buffer, 0, m.Data.Length + 1, 0);
break;
case MidiEvent.Meta:
// do nothing.
break;
default:
var size = MidiEvent.FixedDataSize(m.StatusByte);
buffer [0] = m.StatusByte;
buffer [1] = m.Msb;
buffer [2] = m.Lsb;
output.Send(buffer, 0, size + 1, 0);
break;
}
};
}
public MidiSyncPlayer(MidiMusic music, IMidiTimeManager timeManager)
{
if (music == null)
{
throw new ArgumentNullException("music");
}
time_manager = timeManager;
this.music = music;
messages = SmfTrackMerger.Merge(music).Tracks [0].Messages;
state = PlayerState.Stopped;
}
public void Read(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
this.stream = stream;
data = new MidiMusic();
try {
DoParse();
} finally {
this.stream = null;
}
}
public MidiMusic Split()
{
int totalDeltaTime = 0;
foreach (var e in source)
{
totalDeltaTime += e.DeltaTime;
int id = GetTrackID(e);
GetTrack(id).AddMessage(totalDeltaTime, e);
}
var m = new MidiMusic();
m.DeltaTimeSpec = delta_time_spec;
foreach (var t in tracks.Values)
{
m.Tracks.Add(t.Track);
}
return(m);
}
public MidiPlayer(MidiMusic music, IMidiOutput output, IMidiPlayerTimeManager timeManager)
{
if (music == null)
{
throw new ArgumentNullException("music");
}
if (output == null)
{
throw new ArgumentNullException("output");
}
if (timeManager == null)
{
throw new ArgumentNullException("timeManager");
}
this.music = music;
this.output = output;
messages = SmfTrackMerger.Merge(music).Tracks [0].Messages;
player = new MidiEventLooper(messages, timeManager, music.DeltaTimeSpec);
player.Starting += () => {
// all control reset on all channels.
for (int i = 0; i < 16; i++)
{
buffer [0] = (byte)(i + 0xB0);
buffer [1] = 0x79;
buffer [2] = 0;
output.Send(buffer, 0, 3, 0);
}
};
EventReceived += (m) => {
switch (m.EventType)
{
case MidiEvent.NoteOn:
case MidiEvent.NoteOff:
if (channel_mask != null && channel_mask [m.Channel])
{
return; // ignore messages for the masked channel.
}
goto default;
case MidiEvent.SysEx1:
case MidiEvent.SysEx2:
if (buffer.Length <= m.Data.Length)
{
buffer = new byte [buffer.Length * 2];
}
buffer [0] = m.StatusByte;
Array.Copy(m.Data, 0, buffer, 1, m.Data.Length);
output.Send(buffer, 0, m.Data.Length + 1, 0);
break;
case MidiEvent.Meta:
// do nothing.
break;
default:
var size = MidiEvent.FixedDataSize(m.StatusByte);
buffer [0] = m.StatusByte;
buffer [1] = m.Msb;
buffer [2] = m.Lsb;
output.Send(buffer, 0, size + 1, 0);
break;
}
};
}
public static MidiMusic Merge(MidiMusic source)
{
return(new SmfTrackMerger(source).GetMergedMessages());
}
public MidiPlayer(MidiMusic music, IMidiPlayerTimeManager timeManager)
: this(music, MidiAccessManager.Empty, timeManager)
{
}
public MidiPlayer(MidiMusic music, IMidiAccess access, IMidiPlayerTimeManager timeManager)
: this(music, access.OpenOutputAsync(access.Outputs.First().Id).Result, timeManager)
{
should_dispose_output = true;
}
public MidiPlayer(MidiMusic music, IMidiAccess access)
: this(music, access, new SimpleAdjustingMidiPlayerTimeManager())
{
}
public MidiPlayer(MidiMusic music, IMidiOutput output)
: this(music, output, new SimpleAdjustingMidiPlayerTimeManager())
{
}
public MidiPlayer(MidiMusic music)
: this(music, MidiAccessManager.Empty)
{
}
SmfTrackMerger(MidiMusic source)
{
this.source = source;
}
public MidiSyncPlayer(MidiMusic music)
: this(music, new SimpleMidiTimeManager())
{
}
public int GetTotalPlayTimeMilliseconds()
{
return(MidiMusic.GetTotalPlayTimeMilliseconds(messages, music.DeltaTimeSpec));
}
// FIXME: it should rather be implemented to iterate all
// tracks with index to messages, pick the track which contains
// the nearest event and push the events into the merged queue.
// It's simpler, and costs less by removing sort operation
// over thousands of events.
MidiMusic GetMergedMessages()
{
if (source.Format == 0)
{
return(source);
}
IList <MidiMessage> l = new List <MidiMessage> ();
foreach (var track in source.Tracks)
{
int delta = 0;
foreach (var mev in track.Messages)
{
delta += mev.DeltaTime;
l.Add(new MidiMessage(delta, mev.Event));
}
}
if (l.Count == 0)
{
return new MidiMusic()
{
DeltaTimeSpec = source.DeltaTimeSpec
}
}
; // empty (why did you need to sort your song file?)
// Usual Sort() over simple list of MIDI events does not work as expected.
// For example, it does not always preserve event
// orders on the same channels when the delta time
// of event B after event A is 0. It could be sorted
// either as A->B or B->A.
//
// To resolve this issue, we have to sort "chunk"
// of events, not all single events themselves, so
// that order of events in the same chunk is preserved
// i.e. [AB] at 48 and [CDE] at 0 should be sorted as
// [CDE] [AB].
var idxl = new List <int> (l.Count);
idxl.Add(0);
int prev = 0;
for (int i = 0; i < l.Count; i++)
{
if (l [i].DeltaTime != prev)
{
idxl.Add(i);
prev = l [i].DeltaTime;
}
}
idxl.Sort(delegate(int i1, int i2) {
return(l [i1].DeltaTime - l [i2].DeltaTime);
});
// now build a new event list based on the sorted blocks.
var l2 = new List <MidiMessage> (l.Count);
int idx;
for (int i = 0; i < idxl.Count; i++)
{
for (idx = idxl [i], prev = l [idx].DeltaTime; idx < l.Count && l [idx].DeltaTime == prev; idx++)
{
l2.Add(l [idx]);
}
}
l = l2;
// now messages should be sorted correctly.
var waitToNext = l [0].DeltaTime;
for (int i = 0; i < l.Count - 1; i++)
{
if (l [i].Event.Value != 0) // if non-dummy
{
var tmp = l [i + 1].DeltaTime - l [i].DeltaTime;
l [i] = new MidiMessage(waitToNext, l [i].Event);
waitToNext = tmp;
}
}
l [l.Count - 1] = new MidiMessage(waitToNext, l [l.Count - 1].Event);
var m = new MidiMusic();
m.DeltaTimeSpec = source.DeltaTimeSpec;
m.Format = 0;
m.Tracks.Add(new MidiTrack(l));
return(m);
}
}
