/// <summary>
/// reads and determines the type of a track event, and adds that to the proper list
/// </summary>
/// <param name="from">stream where to read from</param>
/// <param name="allevents">list of all events (notes and controllers)</param>
/// <param name="tempoevents">list of tempo events</param>
/// <param name="tsigevents">list of time signature events</param>
/// <returns>number of bytes read</returns>
public static int Read(AudioStream from, TrackChunk track, List <TempoEvent> tempoevents, List <TimeSignatureEvent> tsigevents)
{
track.Events.Add(new TrackEvent());
int index = track.Events.Count - 1;
int eventSize = from.Read(track.Events[index], vlv: "Timing", skipFields: new string[1] {
"AbsoluteTiming"
});
track.TickSize += ByteConverter.ToInt(track.Events[index].Timing);
track.Events[index].AbsoluteTiming = track.TickSize;
// meta and sysex events
switch (track.Events[index].Prefix)
{
case (byte)TrackEvent.EventType.SysEx1:
case (byte)TrackEvent.EventType.SysEx2:
Console.WriteLine("System exclusive events are not supported.");
return(-1);
case (byte)TrackEvent.EventType.Meta:
eventSize += MetaEvent.Read(from, track, tempoevents, tsigevents);
break;
default:
int midiread = MidiEvent.Read(from, track.Events);
if (midiread == -1)
{
return(-1);
}
eventSize += midiread;
break;
}
return(eventSize);
}
public byte[] Size; //VLV
/// <summary>
/// Reads a metaevent from the filestream
/// </summary>
/// <param name="from">stream where to read from</param>
/// <param name="allevents">list of all trackevents</param>
/// <param name="tempoevents">list of tempoevents</param>
/// <param name="tsigevents">list of timesignatureevents</param>
/// <returns>number of bytes read / skipped</returns>
public new static int Read(AudioStream from, TrackChunk track, List <TempoEvent> tempoevents, List <TimeSignatureEvent> tsigevents)
{
// index is always last one in list
int index = track.Events.Count - 1;
// new meta event with the prefix and timing
MetaEvent m = new MetaEvent();
m.CopyFrom(track.Events[index]);
// read new data into the meta event class, Size is a VLV and skip over Timing and Prefix
int eventSize = from.Read(m, vlv: "Size", skipFields: new string[] { "Timing", "Prefix", "AbsoluteTiming" });
// read tempo or time signature events
switch (m.Type)
{
case (byte)MetaEvent.MetaEventType.Tempo:
eventSize += TempoEvent.Read(from, track.Events[index], tempoevents);
track.Events.RemoveAt(index);
return(eventSize);
case (byte)MetaEvent.MetaEventType.TimeSignature:
eventSize += TimeSignatureEvent.Read(from, track.Events[index], tsigevents);
track.Events.RemoveAt(index);
return(eventSize);
}
// skip the meta event data
int skip = ByteConverter.ToInt(m.Size);
from.Skip(skip);
// remove the event since we do not need it
track.Events.RemoveAt(index);
#if (METADEBUG)
this.Debug();
Console.WriteLine("Bytes skipped: {0}", skip);
#endif
return(eventSize + skip);
}