internal virtual void sysexBufferAppendBytes(int msg, int len)
{
for (int i = 0; i < len; i++)
{
byte b = (byte)msg;
if ((msg & 0x80) != 0)
{
if (b == 0xF7)
{ // end of sysex
sysexBufferAppendStatus(b);
sysex(sysexBuffer, sysexBufferIndex);
return;
}
// recursively handle embedded real-time messages
CsPortMidiApi.PmEvent buffer = new CsPortMidiApi.PmEvent();
buffer.timestamp = timestamp;
buffer.message = b;
handleMidiIn(buffer);
}
else
{
sysexBuffer[sysexBufferIndex++] = b;
}
msg = msg >> 8;
}
}
protected internal bool trace = false; // used to print midi msgs for debugging
public CsPortMidi()
{
if (pmRefCount == 0)
{
pm = new CsPortMidiApi();
pmRefCount++;
checkError(CsPortMidiApi.Pm_Initialize());
}
buffer = new CsPortMidiApi.PmEvent();
}
public virtual void handleMidiIn(CsPortMidiApi.PmEvent buffer)
{
if (trace)
{
Console.WriteLine("handleMidiIn: " + buffer.message.ToString("x"));
}
// rather than pass timestamps to every handler, where typically
// timestamps are ignored, just save the timestamp as a member
// variable where methods can access it if they want it
timestamp = buffer.timestamp;
int status = buffer.message & 0xFF;
if (status < 0x80)
{
sysexBufferCheck(); // make enough space
sysexBufferAppendBytes(buffer.message, 4); // process 4 bytes
return;
}
int command = status & 0xF0;
int channel = status & 0x0F;
int data1 = (buffer.message >> 8) & 0xFF;
int data2 = (buffer.message >> 16) & 0xFF;
switch (command)
{
case MIDI_NOTE_OFF:
noteOff(channel, data1, data2);
break;
case MIDI_NOTE_ON:
if (data2 > 0)
{
noteOn(channel, data1, data2);
break;
}
else
{
noteOff(channel, data1);
}
break;
case MIDI_CONTROL:
control(channel, data1, data2);
break;
case MIDI_POLY_TOUCH:
polyTouch(channel, data1, data2);
break;
case MIDI_TOUCH:
touch(channel, data1);
break;
case MIDI_PITCH_BEND:
pitchBend(channel, (data1 + (data2 << 7)) - 8192);
break;
case MIDI_PROGRAM:
program(channel, data1);
break;
case 0xF0:
switch (channel)
{
case 0:
sysexBegin(buffer.message);
break;
case 1:
mtcQuarterFrame(data1);
goto case 2;
case 2:
songPosition(data1 + (data2 << 7));
break;
case 3:
songSelect(data1);
break;
case 4: // unused
break;
case 5: // unused
break;
case 6:
tuneRequest();
break;
case 7:
sysexBufferAppendBytes(buffer.message, buffer.message);
break;
case 8:
clock();
break;
case 9:
tick();
break;
case 0xA:
clockStart();
break;
case 0xB:
clockContinue();
break;
case 0xC:
clockStop();
break;
case 0xD: // unused
break;
case 0xE:
activeSense();
break;
case 0xF:
reset();
break;
}
break;
}
}