private int ProcessAndOutputSong(int songIdx)
{
var song = project.Songs[songIdx];
int minSize = 65536;
int bestChannel = 0;
int bestFactor = 1;
// Take the channel with the most speed effect as the speed channel.
// This was a really dumb optimziation in FT2...
var speedEffectCount = new int[song.Channels.Length];
for (int c = 0; c < song.Channels.Length; c++)
{
foreach (var pattern in song.Channels[c].Patterns)
{
foreach (var note in pattern.Notes.Values)
{
if (note.HasSpeed)
{
speedEffectCount[c]++;
}
}
}
}
int speedChannel = 0;
int maxSpeedEffects = 0;
for (int c = 0; c < song.Channels.Length; c++)
{
if (speedEffectCount[c] > maxSpeedEffects)
{
maxSpeedEffects = speedEffectCount[c];
speedChannel = c;
}
}
for (int factor = 1; factor <= song.PatternLength; factor++)
{
if ((song.PatternLength % factor) == 0 &&
(song.PatternLength / factor) >= MinPatternLength)
{
var splitSong = project.DuplicateSong(song);
if (splitSong.Split(factor))
{
int size = OutputSong(splitSong, songIdx, speedChannel, factor, true);
if (size < minSize)
{
minSize = size;
bestChannel = speedChannel;
bestFactor = factor;
}
}
project.DeleteSong(splitSong);
}
}
var bestSplitSong = project.DuplicateSong(song);
bestSplitSong.Split(bestFactor);
var songSize = OutputSong(bestSplitSong, songIdx, bestChannel, bestFactor, false);
project.DeleteSong(song);
return(songSize);
}