private AudioNote GetNote(int addr)
{
byte lo = mem.Peek(addr);
byte hi = mem.Peek(addr + 1);
return(AudioNote.Decode(lo, hi));
}
public void Sfx(int n, int offset = 0, int length = 0)
{
if (n == -2)
{
Looping = false;
return;
}
for (int i = 0; i < instruments.Length; i++)
{
instruments[i].Stop();
}
activeInstrument = -1;
if (n == -1)
{
sfxPointer = -1;
return;
}
IsPlaying = true;
sfxPointer = MemoryModule.ADDR_SOUND + 68 * n;
sfxOffset = offset * 2;
time = 0;
noteLength = mem.Peek(sfxPointer + 65) / 128f;
loopStart = mem.Peek(sfxPointer + 66);
loopEnd = mem.Peek(sfxPointer + 67);
lastNote = note = AudioNote.Default;
Looping = loopStart != loopEnd;
int sfxLength = GetSfxLength(n);
if (length == 0)
{
length = sfxLength;
}
if (offset + length > sfxLength)
{
this.sfxLength = sfxLength * 2;
}
else
{
this.sfxLength = (offset + length) * 2;
}
if (note.isCustom)
{
Debug.LogWarning("Sfx: custom instruments are not supported");
}
PullNode();
}
private void PullNode()
{
lastNote = note;
int noteAddr = sfxPointer + sfxOffset;
note = GetNote(noteAddr);
arpeggiator.Active = false;
activeInstrument = -1;
for (int i = 0; i < instruments.Length; i++)
{
var waveform = (AudioSynth.Waveform)note.waveform;
if (instruments[i].Waveform == waveform)
{
SfxEffect effect = null;
switch (note.effect)
{
case 1: //slide
effect = new SfxEffectLerp(lastNote.hz, note.hz, lastNote.Volume01, note.Volume01, noteLength);
break;
case 2: //vibrato
effect = new SfxEffectVibrato(AudioNote.PitchToHz(note.pitch - 0.25f), AudioNote.PitchToHz(note.pitch + 0.25f), 8);
break;
case 3: //drop
effect = new SfxEffectLerp(note.hz, 0, note.Volume01, note.Volume01, noteLength);
break;
case 4: //Fade In
effect = new SfxEffectLerp(note.hz, note.hz, 0, note.Volume01, noteLength);
break;
case 5: //Fade Out
effect = new SfxEffectLerp(note.hz, note.hz, note.Volume01, 0, noteLength);
break;
case 6: //fast arpeggio
case 7: //slow arpeggio
int addr = sfxPointer + (sfxOffset >> 3); //sfxOffset >> 2 equals to division by 8 but faster
var n0 = GetNote(addr);
var n1 = GetNote(addr + 2);
var n2 = GetNote(addr + 4);
var n3 = GetNote(addr + 6);
float hz = mem.Peek(sfxPointer + 65) > 8 ? 128 / 4 : 128 / 2;
if (note.effect == 7)
{
hz = hz / 2;
}
arpeggiator.NoteTime = 1 / hz;
arpeggiator.SetNotes(n0.hz, n1.hz, n2.hz, n3.hz);
arpeggiator.Active = true;
effect = null;
break;
}
if (note.volume == 0)
{
instruments[i].Stop();
}
else
{
activeInstrument = i;
instruments[i].Play(note.hz, note.Volume01, effect);
}
}
else
{
instruments[i].Stop();
}
}
//reset the arpeggiator if not in use
if (!arpeggiator.Active)
{
arpeggiator.Reset();
}
}