public LoopDurationInfo CalculateDuration(int previousCommandDuration)
{
var loopDurationInfo = new LoopDurationInfo();
int totalDuration = 0;
int duration = previousCommandDuration;
int startTime = 0;
foreach (var c in this.LoopPart.Commands)
{
if (c is DurationCommand)
{
duration = c.Command;
loopDurationInfo.LoopLastDurationChange = duration;
}
if (c is NoteCommand)
{
// this is rediculous. I hope that loops that are reused all have the same duration going into them if they start with notes...
c.StartTime = startTime;
c.Duration = duration;
startTime += duration;
totalDuration += duration;
}
}
loopDurationInfo.LoopDuration = totalDuration;
return(loopDurationInfo);
}
public void FixDurations()
{
int currentTime = 0;
int currentDuration = 0;
foreach (var c in Commands)
{
c.StartTime = currentTime;
if (c is DurationCommand)
{
currentDuration = c.Command;
}
if (c is NoteCommand)
{
c.Duration = currentDuration;
currentTime += currentDuration;
}
if (c is CallLoopCommand)
{
var loop = c as CallLoopCommand;
var loopDuration = new LoopDurationInfo();
for (int i = 0; i < loop.LoopCount; ++i)
{
loopDuration = loop.CalculateDuration(currentDuration);
}
currentDuration = loopDuration.LoopLastDurationChange;
loop.Duration = loopDuration.LoopDuration;
currentTime += loopDuration.LoopDuration * loop.LoopCount;
}
}
EndTime = currentTime;
}