/// <summary>
/// Start midi playback
/// </summary>
public void PlayMidi()
{
m_mps = MidiPlayerState.PLAYING;
}
/// <summary>
/// Allows the game component to update itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
public override void Update(GameTime gameTime)
{
//increment the midi clock for our purposes
double MidiClockInc = IncrementMidiClock(gameTime.ElapsedGameTime.Ticks);
int curEvent = 0;
if (m_mps == MidiPlayerState.PLAYING && gameTime.ElapsedGameTime.Ticks > 0)
{
bool amPlaying = false;
//ulong bpm = MIDI_MICROSECS_PER_MINUTE / MIDI_EVENT_DATA.MICROSECS_PER_QUARTER_NOTES;
for (int i = 0; i < m_AudioSystem.Midi.MidiEventData.Length; ++i)
{
curEvent = (int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent;
if ((ulong)curEvent >= (ulong)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO.Count) continue;
else amPlaying = true;
//increment our values to what we need
if (m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent].DeltaTime > 0)
{
m_AudioSystem.Midi.MidiEventData[i].deltaTime += MidiClockInc;
m_AudioSystem.Midi.MidiEventData[i].CurrentTime += MidiClockInc;
}
if (m_LoopStart != ulong.MaxValue && m_LoopEnd != ulong.MaxValue && m_AudioSystem.Midi.MidiEventData[i].CurrentTime >= m_LoopEnd)
{
m_AudioSystem.Midi.MidiEventData[i].CurrentTime = m_LoopStart;
}
//if we encountered an event let's handle it or else continue
if (m_AudioSystem.Midi.MidiEventData[i].deltaTime >= m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent].DeltaTime)
{
m_AudioSystem.Midi.MidiEventData[i].deltaTime -= m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent].DeltaTime;
curEvent = (int)++m_AudioSystem.Midi.MidiEventData[i].CurrentEvent;
}
else continue;
#region Midi data
switch (m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent - 1].MidiDataEvents)
{
case MIDI_DATA_EVENTS.NOTE_ON:
//Play the note supplied on the channel supplied
NoteOn(this, new MidiEventArgs((byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent - 1].Parameters[0],
(byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent - 1].Parameters[1],
(byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent - 1].Parameters[2]));
// Console.WriteLine("Note ON: Ch" + ((byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent - 1].Parameters[0]).ToString() + " Note: " + ((byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent - 1].Parameters[1]).ToString() + " Vel: " + ((byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent - 1].Parameters[2]).ToString());
break;
case MIDI_DATA_EVENTS.NOTE_OFF:
//Stop the first occuring note with these properties
NoteOff(this, new MidiEventArgs((byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent - 1].Parameters[0],
(byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent - 1].Parameters[1],
(byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent - 1].Parameters[2]));
// Console.WriteLine("Note OFF: Ch" + ((byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent - 1].Parameters[0]).ToString() + " Note: " + ((byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent - 1].Parameters[1]).ToString() + " Vel: " + ((byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent - 1].Parameters[2]).ToString());
break;
case MIDI_DATA_EVENTS.CONTROLLER:
break;
case MIDI_DATA_EVENTS.PROGRAM_CHANGE:
try
{
//byte foo = (byte)(m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent - 1].Parameters[0]);
//byte bar = (byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent - 1].Parameters[1];
ProgramChange(this, new MidiEventArgs((byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent - 1].Parameters[0],
(byte)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[curEvent - 1].Parameters[1],
0x00));
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
break;
case MIDI_DATA_EVENTS.PITCH_BEND:
break;
}
#endregion
#region Midi Event Data
switch (m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent - 1].MetaEvents)
{
case MIDI_META_EVENTS.TEMPO_SETTING:
UInt32 val = (UInt32)m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent - 1].Parameters[0];
m_AudioSystem.MicrosecsPerQuarterNote = (ulong)val;
break;
case MIDI_META_EVENTS.MARKER_TEXT: break;
}
#endregion
if ((int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent < m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO.Count)
if (m_AudioSystem.Midi.MidiEventData[i].MIDI_EVENT_INFO[(int)m_AudioSystem.Midi.MidiEventData[i].CurrentEvent].DeltaTime == 0) i--;
}
//if we are done then stop
if (!amPlaying) m_mps = MidiPlayerState.STOPPED;
base.Update(gameTime);
}
}
/// <summary>
/// Pause midi playback
/// </summary>
public void PauseMidi()
{
m_mps = MidiPlayerState.PAUSED;
}
/// <summary>
/// Stop midi playback
/// </summary>
public void StopMidi()
{
m_mps = MidiPlayerState.STOPPED;
m_MidiPos = 0;
}
