Example #1
0
        //private int length;

        /// <summary>
        /// Reads a sysex message from a MIDI stream
        /// </summary>
        /// <param name="br">Stream of MIDI data</param>
        /// <returns>a new sysex message</returns>
        public static SysexEvent ReadSysexEvent(BinaryReader br)
        {
            SysexEvent se = new SysexEvent();
            //se.length = ReadVarInt(br);
            //se.data = br.ReadBytes(se.length);

            List <byte> sysexData = new List <byte>();
            bool        loop      = true;

            while (loop)
            {
                byte b = br.ReadByte();
                if (b == 0xF7)
                {
                    loop = false;
                }
                else
                {
                    sysexData.Add(b);
                }
            }

            se.data = sysexData.ToArray();

            return(se);
        }
Example #2
0
        /// <summary>
        /// Constructs a MidiEvent from a BinaryStream
        /// </summary>
        /// <param name="br">The binary stream of MIDI data</param>
        /// <param name="previous">The previous MIDI event (pass null for first event)</param>
        /// <returns>A new MidiEvent</returns>
        public static MidiEvent ReadNextEvent(BinaryReader br, MidiEvent previous)
        {
            int             deltaTime = MidiEvent.ReadVarInt(br);
            MidiCommandCode commandCode;
            int             channel = 1;
            byte            b       = br.ReadByte();

            if ((b & 0x80) == 0)
            {
                // a running command - command & channel are same as previous
                commandCode = previous.CommandCode;
                channel     = previous.Channel;
                br.BaseStream.Position--; // need to push this back
            }
            else
            {
                if ((b & 0xF0) == 0xF0)
                {
                    // both bytes are used for command code in this case
                    commandCode = (MidiCommandCode)b;
                }
                else
                {
                    commandCode = (MidiCommandCode)(b & 0xF0);
                    channel     = (b & 0x0F) + 1;
                }
            }

            MidiEvent me;

            switch (commandCode)
            {
            case MidiCommandCode.NoteOn:
                me = new NoteOnEvent(br);
                break;

            case MidiCommandCode.NoteOff:
            case MidiCommandCode.KeyAfterTouch:
                me = new NoteEvent(br);
                break;

            case MidiCommandCode.ControlChange:
                me = new ControlChangeEvent(br);
                break;

            case MidiCommandCode.PatchChange:
                me = new PatchChangeEvent(br);
                break;

            case MidiCommandCode.ChannelAfterTouch:
                me = new ChannelAfterTouchEvent(br);
                break;

            case MidiCommandCode.PitchWheelChange:
                me = new PitchWheelChangeEvent(br);
                break;

            case MidiCommandCode.TimingClock:
            case MidiCommandCode.StartSequence:
            case MidiCommandCode.ContinueSequence:
            case MidiCommandCode.StopSequence:
                me = new MidiEvent();
                break;

            case MidiCommandCode.Sysex:
                me = SysexEvent.ReadSysexEvent(br);
                break;

            case MidiCommandCode.MetaEvent:
                me = MetaEvent.ReadMetaEvent(br);
                break;

            default:
                throw new FormatException(String.Format("Unsupported MIDI Command Code {0:X2}", (byte)commandCode));
            }
            me.channel     = channel;
            me.deltaTime   = deltaTime;
            me.commandCode = commandCode;
            return(me);
        }