Click here to Skip to main content
Click here to Skip to main content
 
Add your own
alternative version
Go to top

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
using System;
using System.Collections.Generic;
using System.ComponentModel;

namespace Sanford.Multimedia.Midi
{
    public class Sequencer : IComponent
    {
        private Sequence sequence = null;

        private List<IEnumerator<int>> enumerators = new List<IEnumerator<int>>();

        private MessageDispatcher dispatcher = new MessageDispatcher();

        private ChannelChaser chaser = new ChannelChaser();

        private ChannelStopper stopper = new ChannelStopper();

        private MidiInternalClock clock = new MidiInternalClock();

        private int tracksPlayingCount;

        private readonly object lockObject = new object();

        private bool playing = false;

        private bool disposed = false;

        private ISite site = null;

        #region Events

        public event EventHandler PlayingCompleted;

        public event EventHandler<ChannelMessageEventArgs> ChannelMessagePlayed
        {
            add
            {
                dispatcher.ChannelMessageDispatched += value;
            }
            remove
            {
                dispatcher.ChannelMessageDispatched -= value;
            }
        }

        public event EventHandler<SysExMessageEventArgs> SysExMessagePlayed
        {
            add
            {
                dispatcher.SysExMessageDispatched += value;
            }
            remove
            {
                dispatcher.SysExMessageDispatched -= value;
            }
        }

        public event EventHandler<MetaMessageEventArgs> MetaMessagePlayed
        {
            add
            {
                dispatcher.MetaMessageDispatched += value;
            }
            remove
            {
                dispatcher.MetaMessageDispatched -= value;
            }
        }

        public event EventHandler<ChasedEventArgs> Chased
        {
            add
            {
                chaser.Chased += value;
            }
            remove
            {
                chaser.Chased -= value;
            }
        }

        public event EventHandler<StoppedEventArgs> Stopped
        {
            add
            {
                stopper.Stopped += value;
            }
            remove
            {
                stopper.Stopped -= value;
            }
        }

        #endregion

        public Sequencer()
        {
            dispatcher.MetaMessageDispatched += delegate(object sender, MetaMessageEventArgs e)
            {
                if(e.Message.MetaType == MetaType.EndOfTrack)
                {
                    tracksPlayingCount--;

                    if(tracksPlayingCount == 0)
                    {
                        Stop();

                        OnPlayingCompleted(EventArgs.Empty);
                    }
                }
                else
                {
                    clock.Process(e.Message);
                }
            };

            dispatcher.ChannelMessageDispatched += delegate(object sender, ChannelMessageEventArgs e)
            {
                stopper.Process(e.Message);
            };

            clock.Tick += delegate(object sender, EventArgs e)
            {
                lock(lockObject)
                {
                    if(!playing)
                    {
                        return;
                    }

                    foreach(IEnumerator<int> enumerator in enumerators)
                    {
                        enumerator.MoveNext();
                    }
                }
            };
        }

        ~Sequencer()
        {
            Dispose(false);
        }

        protected virtual void Dispose(bool disposing)
        {
            if(disposing)
            {
                lock(lockObject)
                {
                    Stop();

                    clock.Dispose();

                    disposed = true;

                    GC.SuppressFinalize(this);
                }
            }
        }

        public void Start()
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException(this.GetType().Name);
            }

            #endregion           

            lock(lockObject)
            {
                Stop();

                Position = 0;

                Continue();
            }
        }

        public void Continue()
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException(this.GetType().Name);
            }

            #endregion

            #region Guard

            if(Sequence == null)
            {
                return;
            }

            #endregion

            lock(lockObject)
            {
                Stop();

                enumerators.Clear();

                foreach(Track t in Sequence)
                {
                    enumerators.Add(t.TickIterator(Position, chaser, dispatcher).GetEnumerator());
                }

                tracksPlayingCount = Sequence.Count;

                playing = true;
                clock.Ppqn = sequence.Division;
                clock.Continue();
            }
        }

        public void Stop()
        {
            #region Require

            if(disposed)
            {
                throw new ObjectDisposedException(this.GetType().Name);
            }

            #endregion

            lock(lockObject)
            {
                #region Guard

                if(!playing)
                {
                    return;
                }

                #endregion

                playing = false;
                clock.Stop();
                stopper.AllSoundOff();
            }
        }

        protected virtual void OnPlayingCompleted(EventArgs e)
        {
            EventHandler handler = PlayingCompleted;

            if(handler != null)
            {
                handler(this, e);
            }
        }

        protected virtual void OnDisposed(EventArgs e)
        {
            EventHandler handler = Disposed;

            if(handler != null)
            {
                handler(this, e);
            }
        }

        public int Position
        {
            get
            {
                #region Require

                if(disposed)
                {
                    throw new ObjectDisposedException(this.GetType().Name);
                }

                #endregion

                return clock.Ticks;
            }
            set
            {
                #region Require

                if(disposed)
                {
                    throw new ObjectDisposedException(this.GetType().Name);
                }
                else if(value < 0)
                {
                    throw new ArgumentOutOfRangeException();
                }

                #endregion

                bool wasPlaying;

                lock(lockObject)
                {
                    wasPlaying = playing;

                    Stop();

                    clock.SetTicks(value);
                }

                lock(lockObject)
                {
                    if(wasPlaying)
                    {
                        Continue();
                    }
                }
            }
        }

        public Sequence Sequence
        {
            get
            {
                return sequence;
            }
            set
            {
                #region Require

                if(value == null)
                {
                    throw new ArgumentNullException();
                }
                else if(value.SequenceType == SequenceType.Smpte)
                {
                    throw new NotSupportedException();
                }

                #endregion

                lock(lockObject)
                {
                    Stop();
                    sequence = value;
                }
            }
        }

        #region IComponent Members

        public event EventHandler Disposed;

        public ISite Site
        {
            get
            {
                return site;
            }
            set
            {
                site = value;
            }
        }

        #endregion

        #region IDisposable Members

        public void Dispose()
        {
            #region Guard

            if(disposed)
            {
                return;
            }

            #endregion

            Dispose(true);
        }

        #endregion
    }
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

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

Share

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.

| Advertise | Privacy | Mobile
Web03 | 2.8.140926.1 | Last Updated 18 Apr 2007
Article Copyright 2004 by Leslie Sanford
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid