/* Create a new MIDI file (represented by this instance), including the header chunk and appropriate
* number of track chunks (with End of Track events). This does not set delta-time division.
*/
private MidiHeader Create(int format, int numberOfTracks)
{
/* Make sure we start with a clean slate. */
this.Clear();
int n = MidiChunkInfo.SizeItem();
this.Bytes = new byte[n + MidiHeader.SizeItem()];
/* Start the header chunk. */
MidiChunkInfo chunkInfo = this.CreateChunkInfo(0, MidiChunkInfo.HeaderType);
this.Items.Add(chunkInfo);
/* Finish the header chunk. (Don't set NumberOfTracks here; AddTrack will set it.) */
MidiHeader header = new MidiHeader(this, n);
header.Format = format;
this.Items.Add(header);
/* Add each track chunk (with an End of Track meta-event). */
for (int i = 0; i < numberOfTracks; ++i)
{
this.AddTrack();
this.AddMetaEvent(0, MidiMetaEvent.EndOfTrackType, null);
}
/* Delta-time division still needs to be set. */
return(header);
}
private MidiChunkInfo CreateChunkInfo(int offset, string type)
{
MidiChunkInfo chunkInfo = new MidiChunkInfo(this, offset);
chunkInfo.Type = type;
chunkInfo.Length = (type == MidiChunkInfo.HeaderType) ? MidiHeader.SizeItem() : 0;
if (type == MidiChunkInfo.TrackType)
{
++this.Header.NumberOfTracks;
}
return(chunkInfo);
}