void ParseEvent(Data.Buffer data)
{
byte status = data.PeekByte();
if (status == 0xff) // meta event
{
data.Pop(1);
ParseMetaEvent(data);
return;
}
int channel = status & 0xf;
int eventType = status >> 4;
if (eventType < 0x8)
{
uint ticks = data.Pop <byte>();
currentTime += ConvertTicksToTime(ticks);
currentTick += ticks;
return;
}
else if (eventType < 0xF)
{
data.Pop(1);
}
switch (eventType)
{
case 0x9: // Note on
// Note: In XMI it has 3 parameters (last for duration).
// But we create two events (note on and off).
{
byte note = data.Pop <byte>();
byte velocity = data.Pop <byte>();
uint length = ParseDeltaTime(data);
if (velocity != 0)
{
var onEvent = new PlayNoteEvent((byte)channel, note, velocity, currentTime, currentTick);
var offEvent = new StopNoteEvent((byte)channel, note, currentTime + ConvertTicksToTime(length), currentTick + length);
events.Add(onEvent);
events.Add(offEvent);
}
}
break;
case 0xB: // Control change
{
byte controller = (byte)(data.Pop <byte>() & 0x7f);
byte value = (byte)(data.Pop <byte>() & 0x7f);
if (controller < 120) // ignore reserved controller events >= 120
{
events.Add(new SetControllerValueEvent((byte)channel, controller, value, currentTime, currentTick));
}
}
break;
case 0x8:
case 0xA:
case 0xE:
data.Pop(2);
break;
case 0xC:
events.Add(new SetInstrumentEvent((byte)channel, data.Pop <byte>(), currentTime, currentTick));
break;
case 0xD:
data.Pop(1);
break;
default:
throw new ExceptionAudio("Unsupported xmi/midi event type.");
}
}
void ParseEvent(Data.Buffer data)
{
byte status = data.PeekByte();
if (status == 0xff) // meta event
{
data.Pop(1);
ParseMetaEvent(data);
return;
}
int channel = status & 0xf;
int eventType = status >> 4;
if (eventType < 0x8)
{
currentTime += ConvertTicksToTime(data.Pop <byte>());
return;
}
else if (eventType < 0xF)
{
data.Pop(1);
}
switch (eventType)
{
case 0x9: // Note on
// Note: In XMI it has 3 parameters (last for duration).
// But we create two events (note on and off).
{
byte note = data.Pop <byte>();
byte velocity = data.Pop <byte>();
uint length = ParseDeltaTime(data);
if (velocity != 0)
{
var onEvent = new PlayNoteEvent((byte)channel, note, currentTime);
var offEvent = new StopNoteEvent((byte)channel, note, currentTime + ConvertTicksToTime(length));
events.Add(onEvent);
events.Add(offEvent);
}
}
break;
case 0x8:
case 0xA:
case 0xB:
case 0xE:
data.Pop(2);
break;
case 0xC:
{
var patchEvent = new SetInstrumentEvent((byte)channel, data.Pop <byte>(), currentTime);
events.Add(patchEvent);
}
break;
case 0xD:
data.Pop(1);
break;
default:
throw new ExceptionAudio("Unsupported xmi/midi event type.");
}
}