/// <summary>
/// Handles and filters the incoming midi events.
/// </summary>
/// <param name="events">The midi events for the current cycle.</param>
public void Process(VstEventCollection events)
{
foreach (VstEvent evnt in events)
{
if (evnt.EventType == VstEventTypes.MidiEvent)
{
VstMidiEvent midiEvent = (VstMidiEvent)evnt;
//System.Diagnostics.Debug.WriteLine("Receiving Midi Event:" + midiEvent.MidiData[0], "VST.NET");
// pass note on and note off to the sample manager
if ((midiEvent.Data[0] & 0xF0) == 0x80)
{
NoteOff?.Invoke(midiEvent.Data[1]);
}
if ((midiEvent.Data[0] & 0xF0) == 0x90)
{
// note on with velocity = 0 is a note off
if (midiEvent.Data[2] == 0)
{
NoteOff?.Invoke(midiEvent.Data[1]);
}
else
{
NoteOn?.Invoke(midiEvent.Data[1]);
}
}
}
}
}
private void Decode(byte[] message)
{
byte status = message[0];
switch (status & 0b1111_0000)
{
case Midi.Status.NoteOffBitmask:
if (NoteOffMessage.TryDecode(message, out var noteOffMessage))
{
NoteOff?.Invoke(this, in noteOffMessage);
}
break;
case Midi.Status.NoteOnBitmask:
if (NoteOnMessage.TryDecoce(message, out var noteOnMessage))
{
NoteOn?.Invoke(this, in noteOnMessage);
}
break;
case Midi.Status.PolyphonicKeyPressureBitmask:
if (PolyphonicKeyPressureMessage.TryDecode(message, out var polyphonicKeyPressureMessage))
{
PolyphonicKeyPressure?.Invoke(this, in polyphonicKeyPressureMessage);
}
break;
case Midi.Status.ControlChangeBitmask:
if (ControlChangeMessage.TryDecode(message, out var controlChangeMessage))
{
_nrpnInterpreters[(int)controlChangeMessage.Channel].HandleControlChangeMessage(in controlChangeMessage);
}
break;
case Midi.Status.ProgramChangeBitmask:
if (ProgramChangeMessage.TryDecode(message, out var programChangeMessage))
{
ProgramChange?.Invoke(this, in programChangeMessage);
}
break;
case Midi.Status.ChannelPressureBitmask:
if (ChannelPressureMessage.TryDecode(message, out var channelPressureMessage))
{
ChannelPressure?.Invoke(this, in channelPressureMessage);
}
break;
case Midi.Status.PitchBendChange:
if (PitchBendMessage.TryDecode(message, out var pitchBendMessage))
{
PitchBend?.Invoke(this, in pitchBendMessage);
}
break;
default:
Log.Error("Unknown message type {Bitmask}", $"{status & 0b1111_0000:X2}");
break;
}
}
private void lastKeyOff()
{
if (lastKeyOn >= 0)
{
NoteOffEvent noe = new NoteOffEvent((SevenBitNumber)lastKeyOn, (SevenBitNumber)127);
NoteOff?.Invoke(this, noe);
lastKeyOn = -1;
}
}
public void timerUpdate(IYse.IMidiOut output, int elapsed)
{
for (int i = noteOffs.Count - 1; i >= 0; i--)
{
NoteOff current = noteOffs[i];
current.period -= elapsed;
if (current.period <= 0)
{
output.NoteOn(current.channel, current.note, 0);
noteOffs.RemoveAt(i);
}
}
}
private void Update()
{
foreach (var key in virtualKeysDict.Keys)
{
if (Input.GetKeyDown(key))
{
NoteOn?.Invoke(virtualKeysDict[key], 1f);
}
if (Input.GetKeyUp(key))
{
NoteOff?.Invoke(virtualKeysDict[key]);
}
}
}
/// <summary>Parse a voice event from the data stream.</summary>
/// <param name="deltaTime">The previously parsed delta-time for this event.</param>
/// <param name="messageType">The previously parsed type of message we're expecting to find.</param>
/// <param name="channel">The previously parsed channel for this message.</param>
/// <param name="data">The data stream from which to read the event information.</param>
/// <param name="pos">The position of the start of the event information.</param>
/// <returns>The parsed voice MIDI event.</returns>
private static MidiEvent ParseVoiceEvent(long deltaTime, byte messageType, byte channel, byte [] data, ref long pos)
{
try
{
MidiEvent tempEvent = null;
// Create the correct voice event based on its message id/type
switch (messageType)
{
// NOTE OFF
case 0x8:
// **Adding this check seems to make GH1 mids work....GH2s are
// a little more complicated**
if (pos < data.GetLength(0) - 1)
{
tempEvent = new NoteOff(deltaTime, channel, data[pos], data[pos + 1]);
}
pos += 2;
break;
// NOTE ON
case 0x9:
tempEvent = new NoteOn(deltaTime, channel, data[pos], data[pos + 1]);
pos += 2;
break;
// AFTERTOUCH
case 0xA:
tempEvent = new Aftertouch(deltaTime, channel, data[pos], data[pos + 1]);
pos += 2;
break;
// CONTROLLER
case 0xB:
tempEvent = new Controller(deltaTime, channel, data[pos], data[pos + 1]);
pos += 2;
break;
// PROGRAM CHANGE
case 0xC:
tempEvent = new ProgramChange(deltaTime, channel, data[pos]);
pos += 1;
break;
// CHANNEL PRESSURE
case 0xD:
tempEvent = new ChannelPressure(deltaTime, channel, data[pos]);
pos += 1;
break;
// PITCH WHEEL
case 0xE:
int position = ((data[pos] << 8) | data[pos + 1]);
byte upper, lower;
MidiEvent.Split14BitsToBytes(position, out upper, out lower);
tempEvent = new PitchWheel(deltaTime, channel, upper, lower);
pos += 2;
break;
// UH OH!
default: throw new ArgumentOutOfRangeException("messageType", messageType, "Not a voice message.");
}
// Return the newly parsed event
return(tempEvent);
}
// Something bad happened; wrap it in a parser exception
catch (Exception exc) { throw new MidiParserException("Unable to parse voice MIDI event.", exc, pos); }
}
private TrackEvent ReadTrackEvent()
{
var deltaTime = ReadVariableLengthEncoding();
// "Running Status": The last status byte is implied
var statusByte = _lastStatusByte;
var firstByte = _source.ReadByte();
// Check for new status byte
if ((firstByte & 0x80) == 1)
{
statusByte = firstByte;
firstByte = _source.ReadByte();
}
var statusUpper = statusByte >> 4;
// Save running status
if (statusUpper > 0x7 && statusUpper < 0xF)
{
_lastStatusByte = statusByte;
}
// Parse the event
var statusLower = (byte)(statusByte & 0xF);
MidiEvent ev = null;
switch (statusUpper)
{
case 0x8:
ev = new NoteOff(statusLower, firstByte, _source.ReadByte());
break;
case 0x9:
ev = new NoteOn(statusLower, firstByte, _source.ReadByte());
break;
case 0xA:
ev = new PolyphonicKeyPressure(statusLower, firstByte, _source.ReadByte());
break;
case 0xB:
if (firstByte < 120)
{
ev = new ControlChange(statusLower, firstByte, _source.ReadByte());
}
else
{
ev = new ChannelMode(statusLower, firstByte, _source.ReadByte());
}
break;
case 0xC:
ev = new ProgramChange(statusLower, firstByte);
break;
case 0xD:
ev = new ChannelPressure(statusLower, firstByte);
break;
case 0xE:
ev = new PitchBend(statusLower, firstByte, _source.ReadByte());
break;
case 0xF:
switch (statusLower)
{
case 0x0:
case 0x7:
ev = new SysEx(statusLower == 0, _source.ReadBytes(ReadVariableLengthEncoding(firstByte)));
break;
case 0xF:
var len = ReadVariableLengthEncoding();
var data = _source.ReadBytes(len);
switch (firstByte)
{
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x06:
case 0x07:
case 0x08:
case 0x09:
case 0x0A:
case 0x0B:
case 0x0C:
case 0x0D:
case 0x0E:
case 0x0F:
ev = new TextEvent(Encoding.UTF8.GetString(data)); // TODO: Let user choose encoding
break;
case 0x20:
ev = new ChannelPrefix(data[0]);
break;
case 0x2F:
ev = new EndOfTrack();
break;
case 0x51:
ev = new SetTempo(MidiBytesConverter.ReadBigEndian24Bit(data));
break;
case 0x54:
ev = new SmpteOffset((byte)((data[0] >> 5) & 0x3), (byte)(data[0] & 0x1F), data[1], data[2], data[3], data[4]);
break;
case 0x58:
ev = new TimeSignature(data[0], data[1], data[2], data[3]);
break;
case 0x59:
ev = new KeySignature((sbyte)data[0], data[1] == 1);
break;
case 0x7F:
ev = new SequencerSpecificMetaEvent(data);
break;
default:
// TODO: Unrecognized metadata kind, non-fatal error
break;
}
break;
default:
// At this point, if the event was not recognized: FATAL ERROR!
throw new NotImplementedException();
}
break;
default:
// At this point, if the event was not recognized: FATAL ERROR!
throw new NotImplementedException();
}
return(new TrackEvent(deltaTime, ev));
}
/// <summary>
/// Метод, вызывающий событие NoteOff с заданными параметрами.
/// </summary>
/// <param name="noteNo"></param>
/// <param name="velocity"></param>
private void OnNoteOff(byte noteNo, byte velocity)
{
NoteOff?.Invoke(this, new MidiNoteEventArgs(noteNo, velocity, pressedNotesCount));
}
/// <summary>Creates an object creation expression for an event.</summary>
/// <param name="ev">The event to create.</param>
/// <returns>The object creation expression for the event.</returns>
private static CodeObjectCreateExpression CreateVoiceEvent(MidiEvent ev)
{
CodeObjectCreateExpression newEvent = null;
CodeExpression delta = new CodePrimitiveExpression(ev.DeltaTime);
// NOTE ON
if (ev is NoteOn)
{
NoteOn midiEvent = (NoteOn)ev;
newEvent = new CodeObjectCreateExpression(
typeof(NoteOn),
new CodeExpression[] {
delta,
new CodePrimitiveExpression(midiEvent.Channel),
new CodePrimitiveExpression(MidiEvent.GetNoteName(midiEvent.Note)),
new CodePrimitiveExpression(midiEvent.Velocity)
});
}
// NOTE OFF
else if (ev is NoteOff)
{
NoteOff midiEvent = (NoteOff)ev;
newEvent = new CodeObjectCreateExpression(
typeof(NoteOff),
new CodeExpression[] {
delta,
new CodePrimitiveExpression(midiEvent.Channel),
new CodePrimitiveExpression(MidiEvent.GetNoteName(midiEvent.Note)),
new CodePrimitiveExpression(midiEvent.Velocity)
});
}
// AFTERTOUCH
else if (ev is Aftertouch)
{
Aftertouch midiEvent = (Aftertouch)ev;
newEvent = new CodeObjectCreateExpression(
typeof(Aftertouch),
new CodeExpression[] {
delta,
new CodePrimitiveExpression(midiEvent.Channel),
new CodePrimitiveExpression(MidiEvent.GetNoteName(midiEvent.Note)),
new CodePrimitiveExpression(midiEvent.Pressure)
});
}
// PROGRAM CHANGE
else if (ev is ProgramChange)
{
ProgramChange midiEvent = (ProgramChange)ev;
newEvent = new CodeObjectCreateExpression(
typeof(ProgramChange),
new CodeExpression[] {
delta,
new CodePrimitiveExpression(midiEvent.Channel),
new CodeCastExpression(typeof(GeneralMidiInstruments), new CodePrimitiveExpression(midiEvent.Number))
});
}
// CONTROLLER
else if (ev is Controller)
{
Controller midiEvent = (Controller)ev;
newEvent = new CodeObjectCreateExpression(
typeof(Controller),
new CodeExpression[] {
delta,
new CodePrimitiveExpression(midiEvent.Channel),
new CodeCastExpression(typeof(Controllers), new CodePrimitiveExpression(midiEvent.Number)),
new CodePrimitiveExpression(midiEvent.Value),
});
}
// CHANNEL PRESSURE
else if (ev is ChannelPressure)
{
ChannelPressure midiEvent = (ChannelPressure)ev;
newEvent = new CodeObjectCreateExpression(
typeof(ChannelPressure),
new CodeExpression[] {
delta,
new CodePrimitiveExpression(midiEvent.Channel),
new CodePrimitiveExpression(midiEvent.Pressure)
});
}
// PITCH WHEEL
else if (ev is PitchWheel)
{
PitchWheel midiEvent = (PitchWheel)ev;
newEvent = new CodeObjectCreateExpression(
typeof(PitchWheel),
new CodeExpression[] {
delta,
new CodePrimitiveExpression(midiEvent.Channel),
new CodePrimitiveExpression(midiEvent.UpperBits),
new CodePrimitiveExpression(midiEvent.LowerBits)
});
}
// Return the event
return(newEvent);
}
private void SetChordOff(int channel, List<byte> midiPitches)
{
for(int i = 0; i < midiPitches.Count; i++)
{
NoteOff noteOff = new NoteOff(channel, midiPitches[i], 64);
ChordOff.AddNote(noteOff);
}
}
private void Decode(byte[] message)
{
byte status = message[0];
switch (status & 0b1111_0000)
{
case Midi.Status.NoteOffBitmask:
if (NoteOffMessage.TryDecode(message, out var noteOffMessage))
{
NoteOff?.Invoke(this, in noteOffMessage);
}
break;
case Midi.Status.NoteOnBitmask:
if (NoteOnMessage.TryDecode(message, out var noteOnMessage))
{
NoteOn?.Invoke(this, in noteOnMessage);
}
break;
case Midi.Status.PolyphonicKeyPressureBitmask:
if (PolyphonicKeyPressureMessage.TryDecode(message, out var polyphonicKeyPressureMessage))
{
PolyphonicKeyPressure?.Invoke(this, in polyphonicKeyPressureMessage);
}
break;
case Midi.Status.ControlChangeBitmask:
if (ControlChangeMessage.TryDecode(message, out var controlChangeMessage))
{
_nrpnInterpreters[(int)controlChangeMessage.Channel].HandleControlChangeMessage(in controlChangeMessage);
}
break;
case Midi.Status.ProgramChangeBitmask:
if (ProgramChangeMessage.TryDecode(message, out var programChangeMessage))
{
ProgramChange?.Invoke(this, in programChangeMessage);
}
break;
case Midi.Status.ChannelPressureBitmask:
if (ChannelPressureMessage.TryDecode(message, out var channelPressureMessage))
{
ChannelPressure?.Invoke(this, in channelPressureMessage);
}
break;
case Midi.Status.PitchBendChange:
if (PitchBendMessage.TryDecode(message, out var pitchBendMessage))
{
PitchBend?.Invoke(this, in pitchBendMessage);
}
break;
case Midi.Status.System:
switch (status)
{
case Midi.Status.SysExStart:
if (SysExMessage.TryDecode(message, out var sysExMessage))
{
SysEx?.Invoke(this, in sysExMessage);
}
break;
case Midi.Status.MidiTimeCodeQuarterFrame:
if (MidiTimeCodeQuarterFrameMessage.TryDecode(message, out var timeCodeQuarterFrameMessage))
{
MidiTimeCodeQuarterFrame?.Invoke(this, in timeCodeQuarterFrameMessage);
}
break;
case Midi.Status.SongPositionPointer:
if (SongPositionPointerMessage.TryDecode(message, out var songPositionPointerMessage))
{
SongPositionPointer?.Invoke(this, in songPositionPointerMessage);
}
break;
case Midi.Status.SongSelect:
if (SongSelectMessage.TryDecode(message, out var songSelectMessage))
{
SongSelect?.Invoke(this, in songSelectMessage);
}
break;
case Midi.Status.TuneRequest:
if (TuneRequestMessage.TryDecode(message, out var tuneRequestMessage))
{
TuneRequest?.Invoke(this, in tuneRequestMessage);
}
break;
default:
Log.Error("Unknown system message type {Status}", $"{status:X2}");
break;
}
break;
default:
Log.Error("Unknown message type {Bitmask}", $"{status & 0b1111_0000:X2}");
break;
}
}
private void HandleNoteOff(int noteNumber)
{
currentNoteNumbers.Remove(noteNumber);
NoteOff?.Invoke(noteNumber);
}
private MIDI ConvertToFormat1(MIDI src)
{
try
{
Track srcTrack = src.TrackList[0];
var newTracks = new List <Track>();
int cnt = 0; // event counter
var eventlist = new LinkedList <Event>();
uint deltaTime = 0;
// Create Conductor track
foreach (Event ev in srcTrack.EventList)
{
deltaTime += ev.DeltaTime;
if (ev is MetaEvent)
{
MetaEvent modEv;
if (ev is SetTempo)
{
var st = (SetTempo)ev;
modEv = new SetTempo(deltaTime, st.Value);
}
else if (ev is TimeSignature)
{
var ts = (TimeSignature)ev;
modEv = new TimeSignature(deltaTime, ts.Numerator, ts.DenominatorBitShift, ts.MIDIClockPerMetronomeTick, ts.NumberOfNotesPerClocks);
}
else if (ev is KeySignature)
{
var ks = (KeySignature)ev;
modEv = new KeySignature(deltaTime, ks.SignatureNumber, ks.MinorFlagNumber);
}
else if (ev is SequenceTrackName)
{
var stn = (SequenceTrackName)ev;
modEv = new SequenceTrackName(deltaTime, stn.Name);
}
else if (ev is EndOfTrack)
{
modEv = new EndOfTrack(deltaTime);
}
else
{
modEv = new MetaEvent(deltaTime);
}
eventlist.AddLast(modEv);
deltaTime = 0;
if (!(ev is EndOfTrack))
{
cnt++;
}
}
}
newTracks.Add(new Track(eventlist));
eventlist = new LinkedList <Event>();
deltaTime = 0;
// Create System Setup track
foreach (Event ev in srcTrack.EventList)
{
deltaTime += ev.DeltaTime;
if (ev is SysExEvent)
{
eventlist.AddLast(new SysExEvent(deltaTime));
deltaTime = 0;
cnt++;
}
else if (ev is EndOfTrack)
{
eventlist.AddLast(new EndOfTrack(deltaTime));
}
}
newTracks.Add(new Track(eventlist));
// Create Notes track
for (int ch = 0; cnt + 1 < srcTrack.EventList.Count; ch++)
{
eventlist = new LinkedList <Event>();
deltaTime = 0;
foreach (Event ev in srcTrack.EventList)
{
deltaTime += ev.DeltaTime;
if (ev is MIDIEvent)
{
var midiEv = (MIDIEvent)ev;
if (midiEv.Channel == ch)
{
MIDIEvent modEv;
if (midiEv is NoteOn)
{
var nton = (NoteOn)midiEv;
modEv = new NoteOn(deltaTime, nton.Channel, nton.Number, nton.Velocity);
}
else if (midiEv is NoteOff)
{
var ntoff = (NoteOff)midiEv;
modEv = new NoteOff(deltaTime, ntoff.Channel, ntoff.Number, ntoff.Velocity);
}
else if (midiEv is ProgramChange)
{
var pc = (ProgramChange)midiEv;
modEv = new ProgramChange(deltaTime, pc.Channel, pc.Number);
}
else if (midiEv is Volume)
{
var vol = (Volume)midiEv;
modEv = new Volume(deltaTime, vol.Channel, vol.Value);
}
else if (midiEv is Pan)
{
var pan = (Pan)midiEv;
modEv = new Pan(deltaTime, pan.Channel, pan.Value);
}
else if (midiEv is ControlChange)
{
var cc = (ControlChange)midiEv;
modEv = new ControlChange(deltaTime, cc.Channel, cc.Value);
}
else
{
modEv = new MIDIEvent(deltaTime, midiEv.Channel);
}
eventlist.AddLast(modEv);
deltaTime = 0;
cnt++;
}
}
else if (ev is EndOfTrack)
{
eventlist.AddLast(new EndOfTrack(deltaTime));
}
}
newTracks.Add(new Track(eventlist));
}
return(new MIDI(newTracks, 1, newTracks.Count, src.TimeDivision));
}
catch (Exception ex)
{
throw new Exception(Resources.ErrorMIDIFormat1, ex);
}
}
