public SampleSet LoadSampleSetFromComposition(Composition comp)
{
SampleSet set = new SampleSet();
if (comp.Tracks.Count < 2)
return set;
var mainSeq = comp.Tracks[0].GetMainSequence() as MelodySequence;
var mainNotes = mainSeq.ToArray();
for (int track = 1; track < comp.Tracks.Count; track++)
{
Dictionary<Note, int> frequencies = new Dictionary<Note, int>();
if (comp.Tracks[track].Instrument != instrument)
{
// Console.WriteLine("\tSkipping instrument {0}", comp.Tracks[track].Instrument);
continue;
}
var seq = comp.Tracks[track].GetMainSequence() as MelodySequence;
var notes = seq.ToArray();
var max = Math.Min(mainNotes.Length, notes.Length);
if(seq.TotalNoteDuration() < seq.TotalRestDuration())
{
continue;
}
Console.WriteLine("\tAdding instrument {0}", comp.Tracks[track].Instrument);
for (int j = 0; j < max; j++ )
{
if (!frequencies.ContainsKey(notes[j]))
frequencies[notes[j]] = 1;
else frequencies[notes[j]] += 1;
}
/* // Filtering
for (int j = 0; j < max; j++)
{
double normalizedFrequency = frequencies[notes[j]] / (double)max;
// if (normalizedFrequency < filterThreshold)
// continue;
if (notes[j].Velocity > 0)
notes[j].Velocity = 127;
if (!noteHashes.ContainsKey(notes[j]))
noteHashes[notes[j]] = hash++;
}*/
int mainTrackTime = 0;
int accompTrackTime = 0;
int incr = 0;
for (int j = 0; j < max; j++)
{
// make sure to use closest note
if (j + incr >= max)
break;
/* mainTrackTime += mainNotes[j].Duration;
accompTrackTime += notes[j + incr].Duration;
while(accompTrackTime < mainTrackTime)
{
incr++;
if (j + incr + 1 > max)
break;
accompTrackTime += notes[j + incr].Duration;
}*/
if (j + incr > max - 1)
break;
/* if (!noteHashes.ContainsKey(notes[j + incr]))
continue;
// caching notes
if (noteHashes[notes[j + incr]] > MAX_OUTPUTS - 1)
continue;
*/
Sample s = GetSample(mainNotes[j],notes[j+incr]);
set.add(s);
}
}
return set;
}
public Note[] GenerateMelody(MelodySequence inputSeq)
{
SampleSet set = new SampleSet();
var mainNotes = inputSeq.ToArray();
for (int j = 0; j < mainNotes.Length && j < 200; j++)
{
Sample s = GetSample(mainNotes[j],null);
set.add(s);
}
List<Note> notes = new List<Note>();
var reverseHashes = Utils.ReverseDictionary(noteHashes);
int mainTime = 0;
int accompTime = 0;
foreach (Sample sample in set)
{
var res = ComputeNetworkOutput(sample);
//var maxIndex = GetMaxIndex(res);
Note outputNote = null;
if(res[0] <= 0.05)
outputNote = new Note(-1, (int)(res[1] * 64.0),0);
else
outputNote = new Note((NoteNames)(res[0] * 12), 4, (Durations)(res[1] * 64.0));
outputNote.StandardizeDuration();
notes.Add(outputNote);
/* if (reverseHashes.ContainsKey(maxIndex))
{
outputNote = reverseHashes[maxIndex];
notes.Add(outputNote);
/*accompTime += outputNote.Duration;
if (mainTime > accompTime)
{
notes.Add(new Note(-1, mainTime - accompTime, 0));
accompTime += mainTime - accompTime;
}
mainTime += (int)(sample.getInput()[1] * 64.0);*/
//}
}
return notes.ToArray();
}
