public void LoadMusic()
{
_channels = new Sfx[4] {
null, null, null, null
};
IsPlaying = false;
_oscillator = new Oscillator(AudioUnit.SampleRate);
_patternData = new PatternData[64];
for (int i = 0; i < _patternData.Length; i += 1)
{
byte[] vals =
{
_emulator.Memory.ram[i * 4 + 0 + RamAddress.Song],
_emulator.Memory.ram[i * 4 + 1 + RamAddress.Song],
_emulator.Memory.ram[i * 4 + 2 + RamAddress.Song],
_emulator.Memory.ram[i * 4 + 3 + RamAddress.Song]
};
if ((vals[0] & 0x80) == 0x80)
{
_patternData[i].loopStart = true;
}
if ((vals[1] & 0x80) == 0x80)
{
_patternData[i].loopEnd = true;
}
if ((vals[2] & 0x80) == 0x80)
{
_patternData[i].shouldStop = true;
}
_patternData[i].channelCount = new ChannelData[4];
for (int j = 0; j < 4; j += 1)
{
_patternData[i].channelCount[j] = new ChannelData();
if ((vals[j] & 0b01000000) != 0)
{
_patternData[i].channelCount[j].isSilent = true;
}
_patternData[i].channelCount[j].sfxIndex = (byte)(vals[j] & 0b00111111);
}
}
}
public Sfx(byte[] _sfxData, int _sfxIndex, ref float[] audioBuffer, ref Oscillator oscillator, int sampleRate,
int audioBufferIndex = 0)
{
notes = new PicoNote[32];
_audioBuffer = audioBuffer;
duration = _sfxData[65] / 120.0f;
startLoop = _sfxData[66];
endLoop = _sfxData[67];
_sampleRate = sampleRate;
SfxIndex = _sfxIndex;
_oscillator = oscillator;
// Console.WriteLine($"header {_sfxData[64]} {_sfxData[65]} {_sfxData[66]} {_sfxData[67]}");
for (int i = 0; i < _sfxData.Length - 4; i += 2)
{
byte lo = _sfxData[i];
byte hi = _sfxData[i + 1];
notes[i / 2].pitch = (byte)(lo & 0b00111111);
notes[i / 2].waveform = (byte)(((lo & 0b11000000) >> 6) | ((hi & 0b1) << 2));
notes[i / 2].volume = (byte)((hi & 0b00001110) >> 1);
notes[i / 2].effect = (byte)((hi & 0b01110000) >> 4);
notes[i / 2].isCustom = (byte)((hi & 0b10000000) >> 7) == 1;
// Console.WriteLine($"{i} {notes[i / 2].pitch} {notes[i / 2].waveform} {notes[i / 2].volume} {notes[i / 2].effect} {notes[i / 2].isCustom}");
}
oscillator = new Oscillator(sampleRate);
_notesToPlay = new Queue <Note>();
this.AudioBufferIndex = audioBufferIndex;
IsActive = true;
_fadeIn = 0.05f / duration;
}
public Note(ref float[] audioBuffer, int sampleRate, ref Oscillator oscillator, float duration, byte volume,
byte waveform, byte pitch, int pitchFrom = -1, float fadeIn = 1, float fadeOut = 1, bool vibrato = false)
{
_audioBuffer = audioBuffer;
_duration = duration;
_sampleRate = sampleRate;
_fadeIn = fadeIn * duration / 100.0f;
_fadeOut = fadeOut * duration / 100.0f;
_timePassed = 0.0f;
_volume = 1;
isCustom = waveform > 7;
targetVolume = volume / 7.0f;
this.waveform = waveform;
this.pitch = pitch;
_pitchFrom = pitchFrom == -1 ? pitch : pitchFrom;
_oscillator = oscillator;
_vibrato = vibrato;
}
public void Sfx(int n, int?channel = -1, int?offset = 0, int?length = 32)
{
switch (n)
{
case -1:
if (channel == -1)
{
StopAllChannelCount();
break;
}
if (channel < 0 || channel >= ChannelCount)
{
break;
}
sfxChannels[channel.Value] = null;
break;
case -2:
if (channel.Value < 0 || channel.Value >= ChannelCount)
{
break;
}
if (sfxChannels[channel.Value] != null)
{
sfxChannels[channel.Value].loop = false;
}
break;
default:
// If sound is already playing, stop it.
int?index = FindSoundOnAChannel(n);
if (index != null)
{
sfxChannels[index.Value] = null;
}
if (channel == -1)
{
channel = FindAvailableChannel();
if (channel == null)
{
break;
}
}
if (channel == -2)
{
break;
}
byte[] _sfxData = new byte[68];
Buffer.BlockCopy(Emulator.Memory.ram, RamAddress.Sfx + 68 * n, _sfxData, 0, 68);
var osc = new Oscillator(SampleRate);
sfxChannels[channel.Value] = new Sfx(_sfxData, n, ref audioBuffer, ref osc, SampleRate);
sfxChannels[channel.Value].CurrentNote = offset.Value;
sfxChannels[channel.Value].LastIndex = offset.Value + length.Value - 1;
sfxChannels[channel.Value].Start();
break;
}
}
