/// <summary>
/// Reads a meta-event from a stream
/// </summary>
/// <param name="br">A binary reader based on the stream of MIDI data</param>
/// <returns>A new MetaEvent object</returns>
public static MetaEvent ReadMetaEvent(BinaryReader br)
{
MetaEventType metaEvent = (MetaEventType) br.ReadByte();
int length = ReadVarInt(br);
MetaEvent me = new MetaEvent();
switch(metaEvent)
{
case MetaEventType.TrackSequenceNumber: // Sets the track's sequence number.
me = new TrackSequenceNumberEvent(br,length);
break;
case MetaEventType.TextEvent: // Text event
case MetaEventType.Copyright: // Copyright
case MetaEventType.SequenceTrackName: // Sequence / Track Name
case MetaEventType.TrackInstrumentName: // Track instrument name
case MetaEventType.Lyric: // lyric
case MetaEventType.Marker: // marker
case MetaEventType.CuePoint: // cue point
case MetaEventType.ProgramName:
case MetaEventType.DeviceName:
me = new TextEvent(br,length);
break;
case MetaEventType.EndTrack: // This event must come at the end of each track
if(length != 0)
{
throw new FormatException("End track length");
}
break;
case MetaEventType.SetTempo: // Set tempo
me = new TempoEvent(br,length);
break;
case MetaEventType.TimeSignature: // Time signature
me = new TimeSignatureEvent(br,length);
break;
case MetaEventType.KeySignature: // Key signature
me = new KeySignatureEvent(br, length);
break;
case MetaEventType.SequencerSpecific: // Sequencer specific information
me = new SequencerSpecificEvent(br, length);
break;
case MetaEventType.SmpteOffset:
me = new SmpteOffsetEvent(br, length);
break;
default:
//System.Windows.Forms.MessageBox.Show(String.Format("Unsupported MetaEvent {0} length {1} pos {2}",metaEvent,length,br.BaseStream.Position));
me.data = br.ReadBytes(length);
if (me.data.Length != length)
{
throw new FormatException("Failed to read metaevent's data fully");
}
break;
}
me.metaEvent = metaEvent;
me.metaDataLength = length;
return me;
}
/// <summary>
/// Reads a meta-event from a stream
/// </summary>
/// <param name="br">A binary reader based on the stream of MIDI data</param>
/// <returns>A new MetaEvent object</returns>
public static MetaEvent ReadMetaEvent(BinaryReader br)
{
MetaEventType metaEvent = (MetaEventType)br.ReadByte();
int length = ReadVarInt(br);
MetaEvent me = new MetaEvent();
switch (metaEvent)
{
case MetaEventType.TrackSequenceNumber: // Sets the track's sequence number.
me = new TrackSequenceNumberEvent(br, length);
break;
case MetaEventType.TextEvent: // Text event
case MetaEventType.Copyright: // Copyright
case MetaEventType.SequenceTrackName: // Sequence / Track Name
case MetaEventType.TrackInstrumentName: // Track instrument name
case MetaEventType.Lyric: // lyric
case MetaEventType.Marker: // marker
case MetaEventType.CuePoint: // cue point
case MetaEventType.ProgramName:
case MetaEventType.DeviceName:
me = new TextEvent(br, length);
break;
case MetaEventType.EndTrack: // This event must come at the end of each track
if (length != 0)
{
throw new FormatException("End track length");
}
break;
case MetaEventType.SetTempo: // Set tempo
me = new TempoEvent(br, length);
break;
case MetaEventType.TimeSignature: // Time signature
me = new TimeSignatureEvent(br, length);
break;
case MetaEventType.KeySignature: // Key signature
me = new KeySignatureEvent(br, length);
break;
case MetaEventType.SequencerSpecific: // Sequencer specific information
me = new SequencerSpecificEvent(br, length);
break;
case MetaEventType.SmpteOffset:
me = new SmpteOffsetEvent(br, length);
break;
default:
//System.Windows.Forms.MessageBox.Show(String.Format("Unsupported MetaEvent {0} length {1} pos {2}",metaEvent,length,br.BaseStream.Position));
me.data = br.ReadBytes(length);
if (me.data.Length != length)
{
throw new FormatException("Failed to read metaevent's data fully");
}
break;
}
me.metaEvent = metaEvent;
me.metaDataLength = length;
return(me);
}
