Ejemplo n.º 1
0
		/// <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;
		}
Ejemplo n.º 2
0
        /// <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);
        }
Ejemplo n.º 3
0
        public static MetaEvent ReadMetaEvent(BinaryReader br)
        {
            MetaEventType metaEventType  = (MetaEventType)br.ReadByte();
            int           num            = MidiEvent.ReadVarInt(br);
            MetaEvent     metaEvent      = new MetaEvent();
            MetaEventType metaEventType2 = metaEventType;

            if (metaEventType2 <= MetaEventType.SetTempo)
            {
                switch (metaEventType2)
                {
                case MetaEventType.TrackSequenceNumber:
                    metaEvent = new TrackSequenceNumberEvent(br, num);
                    goto IL_E9;

                case MetaEventType.TextEvent:
                case MetaEventType.Copyright:
                case MetaEventType.SequenceTrackName:
                case MetaEventType.TrackInstrumentName:
                case MetaEventType.Lyric:
                case MetaEventType.Marker:
                case MetaEventType.CuePoint:
                case MetaEventType.ProgramName:
                case MetaEventType.DeviceName:
                    metaEvent = new TextEvent(br, num);
                    goto IL_E9;

                default:
                    if (metaEventType2 != MetaEventType.EndTrack)
                    {
                        if (metaEventType2 == MetaEventType.SetTempo)
                        {
                            metaEvent = new TempoEvent(br, num);
                            goto IL_E9;
                        }
                    }
                    else
                    {
                        if (num != 0)
                        {
                            throw new FormatException("End track length");
                        }
                        goto IL_E9;
                    }
                    break;
                }
            }
            else
            {
                if (metaEventType2 == MetaEventType.SmpteOffset)
                {
                    metaEvent = new SmpteOffsetEvent(br, num);
                    goto IL_E9;
                }
                switch (metaEventType2)
                {
                case MetaEventType.TimeSignature:
                    metaEvent = new TimeSignatureEvent(br, num);
                    goto IL_E9;

                case MetaEventType.KeySignature:
                    metaEvent = new KeySignatureEvent(br, num);
                    goto IL_E9;

                default:
                    if (metaEventType2 == MetaEventType.SequencerSpecific)
                    {
                        metaEvent = new SequencerSpecificEvent(br, num);
                        goto IL_E9;
                    }
                    break;
                }
            }
            metaEvent.data = br.ReadBytes(num);
            if (metaEvent.data.Length != num)
            {
                throw new FormatException("Failed to read metaevent's data fully");
            }
IL_E9:
            metaEvent.metaEvent      = metaEventType;
            metaEvent.metaDataLength = num;
            return(metaEvent);
        }