void Dispatch(MidiEvent ev)
{
switch (miv.type)
{
case MidiEvent.Type.Controller:
switch (ev.p1)
{
case 0x63: // depth control
// TD: implement
break;
case 0x66: // song marker
// This can be used to notify the music player that a certain point
// in a song has been reached, or to trigger some kind of action in
// time with the music.
break;
case 0x67: // control rhythm mode
rhythmMode = ev.p2 > 0;
if (rhythmMode)
{
regbd = 1 << 5;
adlib.Poke(0xBD, regbd);
}
else
{
regbd = 0;
adlib.Poke(0xBD, regbd);
}
break;
case 0x68: // transpose up
// TD: implement
break;
case 0x69: // transpose down
// TD: implement
break;
}
break;
case MidiEvent.Type.ProgramChange:
if (rhythmMode && ev.channel >= 11)
{
LoadRhythm(adlib, ev.channel, cmfFile.instruments[ev.p1]);
}
else
{
LoadInstrument(adlib, ev.channel, cmfFile.instruments[ev.p1]);
}
break;
case MidiEvent.Type.NoteOn:
if (ev.p2 > 0)
{
if (channels[ev.channel].midiNote != -1)
{
SetGate(ev.channel, false);
}
channels[ev.channel].midiNote = ev.p1;
if (rhythmMode && ev.channel >= 11)
{
if (ev.channel == 11) // bassdrum
{
SetChannelPitch(6, ev.p1);
}
SetRhythmGate(ev.channel, true);
SetRhythmVelocity(ev.channel, ev.p2 / 127f);
switch (ev.channel)
{
case 11: // bassdrum
ChannelActivity?.Invoke(time, 6, ev.p2 / 127f);
break;
case 12: // snare
case 13: // tom
ChannelActivity?.Invoke(time, 7, ev.p2 / 127f);
break;
case 14: // cymbal
case 15: // hat
ChannelActivity?.Invoke(time, 8, ev.p2 / 127f);
break;
}
}
else
{
SetChannelPitch(ev.channel, ev.p1);
SetChannelVelocity(ev.channel, ev.p2 / 127f);
SetGate(ev.channel, true);
ChannelActivity?.Invoke(time, ev.channel, ev.p2 / 127f);
}
}
else
{
if (channels[ev.channel].midiNote == ev.p1)
{
channels[ev.channel].midiNote = -1;
if (rhythmMode && ev.channel >= 11)
{
SetRhythmGate(ev.channel, false);
}
else
{
SetGate(ev.channel, false);
}
}
}
break;
case MidiEvent.Type.NoteOff:
if (channels[ev.channel].midiNote == ev.p1)
{
if (rhythmMode && ev.channel >= 11)
{
SetRhythmGate(ev.channel, false);
}
else
{
SetGate(ev.channel, false);
}
}
break;
}
}
public MidiEvent ReadEvent()
{
var ev = new MidiEvent();
ev.delta = RVlen(f);
int b = f.ReadByte();
int type;
if (b < 128)
{
if (rstatus == -1)
{
throw new Exception("read error");
}
type = rstatus;
f.Position--;
}
else
{
type = b;
rstatus = type;
}
switch (type & 0xF0)
{
case 0x80:
case 0x90:
case 0xA0:
case 0xB0:
case 0xE0:
ev.channel = (type & 0xF);
type >>= 4;
ev.p1 = f.ReadByte();
ev.p2 = f.ReadByte();
break;
case 0xC0:
case 0xD0:
ev.channel = type & 0xF;
type >>= 4;
ev.p1 = f.ReadByte();
break;
case 0xF0:
if (type == 0xFF)
{
ev.metaType = f.ReadByte();
if (ev.metaType == 0x2F)
{
end = true;
}
}
type >>= 4;
ev.data = new byte[RVlen(f)];
f.Read(ev.data, 0, ev.data.Length);
break;
default:
throw new Exception("bad event x" + type.ToString("X2").ToUpper());
}
ev.type = (MidiEvent.Type)type;
return(ev);
}
