private void PlayNote(Track track, byte key, byte duration)
{
VoiceEntry entry = GetVoiceEntry(track.Voice, key);
if (entry != null)
{
track.NoteDuration = duration;
if (track.Index >= 8)
{
// TODO: "Sample" byte in VoiceEntry
((SquareChannel)track.Channel).Init(key, new ADSR {
A = 0xFF, D = 0x00, S = 0xFF, R = 0x00
}, track.Volume, track.Panpot, track.GetPitch());
}
else
{
int sto = _config.SampleTableOffset;
int sampleOffset = _config.Reader.ReadInt32(sto + (entry.Sample * 4)); // Some entries are 0. If you play them, are they silent, or does it not care if they are 0?
((PCMChannel)track.Channel).Init(key, new ADSR {
A = 0xFF, D = 0x00, S = 0xFF, R = 0x00
}, sto + sampleOffset, entry.IsFixedFrequency == 0x80);
track.Channel.SetVolume(track.Volume, track.Panpot);
track.Channel.SetPitch(track.GetPitch());
}
}
}
private VoiceEntry GetVoiceEntry(byte voice, byte key)
{
int vto = _config.VoiceTableOffset;
short voiceOffset = _config.Reader.ReadInt16(vto + (voice * 2));
short nextVoiceOffset = _config.Reader.ReadInt16(vto + ((voice + 1) * 2));
if (voiceOffset == nextVoiceOffset)
{
return(null);
}
else
{
long pos = vto + voiceOffset; // Prevent object creation in the last iteration
VoiceEntry e = _config.Reader.ReadObject <VoiceEntry>(pos);
while (e.MinKey > key || e.MaxKey < key)
{
pos += 8;
if (pos == nextVoiceOffset)
{
return(null);
}
e = _config.Reader.ReadObject <VoiceEntry>();
}
return(e);
}
}
