public static MusicEvent Parse(byte[] data,ref int offset)
{
if (data == null)
throw new ArgumentNullException("data");
if (offset < 0 || offset >= data.Length)
throw new ArgumentOutOfRangeException("offset");
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
byte cmd = data[offset++];
int channel = cmd & 0xF;
int evtype = (cmd >> 4) & 7;
MusicEvent result;
if (evtype == 0)
{
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
int note = data[offset++] & 127;
result = new MusicNoteOffEvent(note,channel,0);
}
else if (evtype == 1)
{
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
int note = data[offset++];
int? volume = null;
if ((note & 128) != 0)
{
note &= 127;
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
volume = data[offset++] & 127;
}
result = new MusicNoteOnEvent(note,volume,channel,0);
}
else if (evtype == 2)
{
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
int value = data[offset++];
result = new MusicPitchEvent(value,channel,0);
}
else if (evtype == 3)
{
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
offset++;
// TODO
result = new MusicUnknownEvent(channel,0);
}
else if (evtype == 4)
{
if (data.Length < offset + 2)
{
throw new ApplicationException();
}
int controller = data[offset++] & 127;
int value = data[offset++] & 127;
result = new MusicControllerEvent(controller,value,channel,0);
}
else if (evtype == 6)
{
// TODO
result = new MusicUnknownEvent(channel,0);
}
else
{
result = new MusicUnknownEvent(channel,0);
}
while ((cmd & 128) != 0)
{
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
cmd = data[offset++];
result.delay <<= 7;
result.delay += cmd & 127;
}
return result;
}
public static MusicEvent Parse(byte[] data, ref int offset)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (offset < 0 || offset >= data.Length)
{
throw new ArgumentOutOfRangeException("offset");
}
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
byte cmd = data[offset++];
int channel = cmd & 0xF;
int evtype = (cmd >> 4) & 7;
MusicEvent result;
if (evtype == 0)
{
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
int note = data[offset++] & 127;
result = new MusicNoteOffEvent(note, channel, 0);
}
else if (evtype == 1)
{
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
int note = data[offset++];
int?volume = null;
if ((note & 128) != 0)
{
note &= 127;
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
volume = data[offset++] & 127;
}
result = new MusicNoteOnEvent(note, volume, channel, 0);
}
else if (evtype == 2)
{
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
int value = data[offset++];
result = new MusicPitchEvent(value, channel, 0);
}
else if (evtype == 3)
{
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
offset++;
// TODO
result = new MusicUnknownEvent(channel, 0);
}
else if (evtype == 4)
{
if (data.Length < offset + 2)
{
throw new ApplicationException();
}
int controller = data[offset++] & 127;
int value = data[offset++] & 127;
result = new MusicControllerEvent(controller, value, channel, 0);
}
else if (evtype == 6)
{
// TODO
result = new MusicUnknownEvent(channel, 0);
}
else
{
result = new MusicUnknownEvent(channel, 0);
}
while ((cmd & 128) != 0)
{
if (data.Length < offset + 1)
{
throw new ApplicationException();
}
cmd = data[offset++];
result.delay <<= 7;
result.delay += cmd & 127;
}
return(result);
}
