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C# MIDI Toolkit

, 18 Apr 2007
A toolkit for creating MIDI applications with C#.
csharpmiditoolkitv4_demo.zip
CSharpMidiToolkitV4_demo
LSCollections.dll
MidiToolkitDemo
Properties
Settings.settings
MidiWatcher
Properties
Settings.settings
Multimedia.dll
Multimedia.Midi
Clocks
Device Classes
InputDevice Class
OutputDevice Classes
Messages
Message Builders
Multimedia.Midi.csproj.user
Processing
Sequencing
Midi File Player
Track Classes
UI
StateMachineToolkit.dll
csharpmiditoolkitv5_demo.zip
CSharpMidiToolkitV5_demo
MidiWatcher
Properties
Settings.settings
Sanford.Collections.dll
Sanford.Multimedia.dll
Sanford.Multimedia.Midi
Clocks
Device Classes
InputDevice Class
OutputDevice Classes
Messages
EventArgs
Message Builders
Processing
Sanford.Multimedia.Midi.csproj.user
Sequencing
Track Classes
UI
Sanford.Multimedia.Timers.dll
Sanford.Threading.dll
SequencerDemo
Properties
Settings.settings
miditoolkit_demo.zip
CSharpMidiToolkit
MidiToolkitDemo
App.ico
MidiToolkitDemo.csproj.user
Multimedia
Multimedia.csproj.user
Multimedia.Midi
Devices
Messages
Message Adaptors
MIDI File
Multimedia.MIDI.csproj.user
Sequencing
Synchronization
UI
miditoolkit_src.zip
MidiToolkit_src
Devices
Messages
MIDI File
Sequencing
TickGenerators
UI
#region License

/* Copyright (c) 2005 Leslie Sanford
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy 
 * of this software and associated documentation files (the "Software"), to 
 * deal in the Software without restriction, including without limitation the 
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 
 * sell copies of the Software, and to permit persons to whom the Software is 
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software. 
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
 * THE SOFTWARE.
 */

#endregion

#region Contact

/*
 * Leslie Sanford
 * Email: jabberdabber@hotmail.com
 */

#endregion

using System;
using System.Diagnostics;
using System.Threading;
using Multimedia;

namespace Multimedia.Midi
{
    public sealed partial class InputDevice
    {
        public override void Close()
        {
            #region Guard

            if(disposed)
            {
                return;
            }

            #endregion

            lock(lockObject)
            {
                disposing = true;

                Reset();

                while(sysExBufferCount > 0)
                {
                    Monitor.Wait(lockObject);
                }

                int result = midiInClose(handle);

                Debug.Assert(result == DeviceException.MMSYSERR_NOERROR);

                delegateQueue.Dispose();
                disposed = true;
            }
        }

        public void StartRecording()
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            lock(lockObject)
            {
                int result = midiInStart(Handle);

                if(result == DeviceException.MMSYSERR_NOERROR)
                {
                    recording = true;
                }
                else
                {
                    throw new InputDeviceException(result);
                }
            }
        }

        public void StopRecording()
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            #region Guard

            if(!recording)
            {
                return;
            }

            #endregion

            lock(lockObject)
            {
                int result = midiInStop(Handle);

                if(result == DeviceException.MMSYSERR_NOERROR)
                {
                    recording = false;
                }
                else
                {
                    throw new InputDeviceException(result);
                }
            }
        }

        public override void Reset()
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            lock(lockObject)
            {
                int result = midiInReset(Handle);

                if(result == DeviceException.MMSYSERR_NOERROR)
                {
                    recording = false;
                }
                else
                {
                    throw new InputDeviceException(result);
                }
            }
        }

        public void AddSysExBuffer(int size)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }
            else if(size < 0)
            {
                throw new ArgumentOutOfRangeException("size", size,
                    "System exclusive buffer size out of range.");
            }

            #endregion

            #region Guard

            if(disposing)
            {
                return;
            }

            #endregion

            lock(lockObject)
            {
                // Initialize the MidiHeader builder.
                headerBuilder.BufferLength = size;
                headerBuilder.Build();

                // Get the pointer to the built MidiHeader.
                IntPtr headerPtr = headerBuilder.Result;

                // Prepare the header to be used.
                int result = midiInPrepareHeader(Handle, headerPtr, SizeOfMidiHeader);

                // If the header was perpared successfully.
                if(result == DeviceException.MMSYSERR_NOERROR)
                {
                    sysExBufferCount++;

                    // Add the buffer to the InputDevice.
                    result = midiInAddBuffer(Handle, headerPtr, SizeOfMidiHeader);

                    // If the buffer could not be added.
                    if(result != DeviceException.MMSYSERR_NOERROR)
                    {
                        // Unprepare header - there's a chance that this will fail 
                        // for whatever reason, but there's not a lot that can be
                        // done about it at this point.
                        midiInUnprepareHeader(Handle, headerPtr, SizeOfMidiHeader);

                        sysExBufferCount--;

                        // Destroy header.
                        headerBuilder.Destroy();

                        // Throw an exception.
                        throw new InputDeviceException(result);
                    }
                }
                // Else the header could not be prepared.
                else
                {
                    // Destroy header.
                    headerBuilder.Destroy();

                    // Throw an exception.
                    throw new InputDeviceException(result);
                }
            }
        }

        public static MidiInCaps GetDeviceCapabilities(int deviceID)
        {
            int result;
            MidiInCaps caps = new MidiInCaps();

            result = midiInGetDevCaps(deviceID, ref caps, SizeOfMidiHeader);

            if(result != DeviceException.MMSYSERR_NOERROR)
            {
                throw new InputDeviceException(result);
            }

            return caps;
        }

        public override void Dispose()
        {
            #region Guard

            if(disposed)
            {
                return;
            }

            #endregion

            Close();

            GC.SuppressFinalize(this);
        }

        public void Connect(Sink<ChannelMessage> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            channelNotifier.Connect(sink);
        }

        public void Disconnect(Sink<ChannelMessage> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            channelNotifier.Disconnect(sink);
        }

        public void Connect(Sink<SysExMessage> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            sysExNotifier.Connect(sink);
        }

        public void Disconnect(Sink<SysExMessage> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            sysExNotifier.Disconnect(sink);
        }

        public void Connect(Sink<SysCommonMessage> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            sysCommonNotifier.Connect(sink);
        }

        public void Disconnect(Sink<SysCommonMessage> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            sysCommonNotifier.Disconnect(sink);
        }

        public void Connect(Sink<SysRealtimeMessage> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            sysRealtimeNotifier.Connect(sink);
        }

        public void Disconnect(Sink<SysRealtimeMessage> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            sysRealtimeNotifier.Disconnect(sink);
        }

        public void Connect(Sink<int> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            invalidShortMessageNotifier.Connect(sink);
        }

        public void Disconnect(Sink<int> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            invalidShortMessageNotifier.Disconnect(sink);
        }

        public void Connect(Sink<byte[]> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            invalidSysExMessageNotifier.Connect(sink);
        }

        public void Disconnect(Sink<byte[]> sink)
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException("InputDevice");
            }

            #endregion

            invalidSysExMessageNotifier.Disconnect(sink);
        }
    }
}

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This article, along with any associated source code and files, is licensed under The MIT License

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About the Author

Leslie Sanford

United States United States
Aside from dabbling in BASIC on his old Atari 1040ST years ago, Leslie's programming experience didn't really begin until he discovered the Internet in the late 90s. There he found a treasure trove of information about two of his favorite interests: MIDI and sound synthesis.
 
After spending a good deal of time calculating formulas he found on the Internet for creating new sounds by hand, he decided that an easier way would be to program the computer to do the work for him. This led him to learn C. He discovered that beyond using programming as a tool for synthesizing sound, he loved programming in and of itself.
 
Eventually he taught himself C++ and C#, and along the way he immersed himself in the ideas of object oriented programming. Like many of us, he gotten bitten by the design patterns bug and a copy of GOF is never far from his hands.
 
Now his primary interest is in creating a complete MIDI toolkit using the C# language. He hopes to create something that will become an indispensable tool for those wanting to write MIDI applications for the .NET framework.
 
Besides programming, his other interests are photography and playing his Les Paul guitars.

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Article Copyright 2004 by Leslie Sanford
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