public void ExportSong()
{
// Get the active song data
var songData = musicChip.trackerDataCollection[patterns[currentPattern]];
var totalNotesRendered = 0;
int tracknum;
int notenum;
int gotANote;
var tcount = songData.tracks.Length;
var ncount = songData.tracks[0].notes.Length;
var totalNotesInSong = ncount; // total musical notes in song loops x notes
note_tick_s = 15.0f / songData.speedInBPM; // (15.0f/120.0f) = 120BPM sixteenth notes
note_tick_s_odd = note_tick_s * swing_rhythm_factor; // small beat
var notedatalength = (int)(preRenderBitrate * 2f * note_tick_s_odd); // one note worth of stereo audio (x2)
// TODO this is off. It is happening to fast and not matching up to the correct speed of the song.
var beatlength = preRenderBitrate * note_tick_s_odd; // one note worth of time
var songdatalength = notedatalength * totalNotesInSong; // stereo cd quality x song length
var notebuffer = new float[notedatalength];
if (trackresult == null)
{
// all the tracks we need - an array of audioclips that will be merged into result
trackresult = new RawAudioData[tcount];
for (var i = 0; i < tcount; i++)
{
trackresult[i] = new RawAudioData(0, 1,
preRenderBitrate);
}
}
var instrument = new SfxrSynth[songData.totalTracks];
var newStartPos = trackresult[0].samples / 2;
var newLength = trackresult[0].samples + songdatalength;
for (tracknum = 0; tracknum < tcount; tracknum++)
{
if (instrument[tracknum] == null)
{
instrument[tracknum] = new SfxrSynth();
}
var songdataCurrentPos = newStartPos;
trackresult[tracknum].Resize(newLength);
// set the params to current track's instrument string
instrument[tracknum].parameters
.SetSettingsString(soundChip.ReadSound(songData.tracks[tracknum].sfxID).param);
// Loop through all of the notes in the track
for (notenum = 0; notenum < ncount; notenum++)
{
// what note is it?
gotANote = songData.tracks[tracknum].notes[notenum];
// generate one note worth of audio data
if (gotANote > 0 && instrument[tracknum] != null)
{
//instrument[tracknum].Reset(true); // seems to do nothing
// doing this for every note played is insane:
// try a fresh new instrument (RAM and GC spammy)
instrument[tracknum] = new SfxrSynth(); // shouldn't be required, but for some reason it is
// set the params to current track's instrument string
instrument[tracknum].parameters
.SetSettingsString(soundChip.ReadSound(songData.tracks[tracknum].sfxID).param);
// pitch shift the sound to the correct musical note frequency
instrument[tracknum].parameters.startFrequency = noteStartFrequency[gotANote];
// maybe this will help
// instrument[tracknum].GenerateAudioFilterData(float[] __data, int __channels)
// or perhaps this - nope: outputs silence... hmm
//bool gotAllData = instrument[tracknum].SynthWave(notebuffer, 0, (uint)notedatalength);// (uint)notebuffer.Length);
// unlikely but helpful - used by GenerateAudioFilterData
// WriteSamples(float[] __originSamples, int __originPos, float[] __targetSamples, int __targetChannels) {
// Writes raw samples to Unity's format and return number of samples actually written
// does play need to be called for it to be generated properly?
instrument[tracknum].CacheSound(); // generate cachedWave data
// grab the sample data - this data is not in the same fmt as unity's internal?
// sounds pitch-shifted and faster - a different bitrate?
// WORKS GREAT IF WE RUN CACHESOUND() FIRST
// TODO need to figure out why we can't access the cachedWave
notebuffer = instrument[tracknum].data; // the wave data for the current note
// this SHOULD be the solution. but outputs all 0's
//bool gotAllData = instrument[tracknum].GenerateAudioFilterData(notebuffer, 2);
// move sound data into audioclip buffer
if (notebuffer != null && notebuffer.Length > 0)
{
trackresult[tracknum].SetData(notebuffer, songdataCurrentPos);
}
// else
// Debug.LogWarning("Notebuffer was blank. Ignoring.");
totalNotesRendered++;
}
// TODO converted this to an int, may break?
songdataCurrentPos += (int)beatlength; //notedatalength; this is x2 due to stereo
//yield return null; // if here, min one frame PER note PER track PER loop: too slow
} // for all notes
} // for all tracks
currentPattern++;
currentStep++;
}
