public static int ComputeNumberOfFrameForGroove(int length, int[] groove, int groovePadMode)
{
// Look in the cache first.
var key = new CacheGrooveLengthKey()
{
groove = groove, groovePadMode = groovePadMode
};
if (cachedGrooveLengths.TryGetValue(key, out var grooveLengthArray))
{
return(grooveLengthArray[length]);
}
grooveLengthArray = new int[Pattern.MaxLength];
// Add to cache if not found.
var idx = 0;
var grooveIterator = new GrooveIterator(groove, groovePadMode);
// This is really not optimal, not need to run the full iterator until the very end.
for (int i = 0; i < grooveLengthArray.Length; i++)
{
if (grooveIterator.IsPadFrame)
{
grooveIterator.Advance();
}
grooveLengthArray[idx++] = grooveIterator.FrameIndex;
grooveIterator.Advance();
}
cachedGrooveLengths.Add(key, grooveLengthArray);
return(grooveLengthArray[length]);
}
protected void UpdateTempo()
{
if (famitrackerTempo)
{
// Tempo/speed logic straight from Famitracker.
var tempoDecrement = (song.FamitrackerTempo * 24) / famitrackerSpeed;
var tempoRemainder = (song.FamitrackerTempo * 24) % famitrackerSpeed;
if (famitrackerTempoCounter <= 0)
{
int ticksPerSec = palPlayback ? 50 : 60;
famitrackerTempoCounter += (60 * ticksPerSec) - tempoRemainder;
}
famitrackerTempoCounter -= tempoDecrement;
}
else
{
grooveIterator.Advance();
}
}
