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C# MIDI Toolkit

, 18 Apr 2007 MIT
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
/*
 * Created by: Leslie Sanford
 * 
 * Contact: jabberdabber@hotmail.com
 * 
 * Last modified: 08/04/2004
 */

using System;

namespace Multimedia.Midi
{
    /// <summary>
    /// Provides easy to use functionality for meta time signature messages.
    /// </summary>
	public class TimeSignature : IMetaMessageAdaptor
	{
        #region TimeSignature Members

        #region Constants

        // Default numerator value.
        private const byte DefaultNumerator = 4;

        // Default denominator value.
        private const byte DefaultDenominator = 4;

        // Default clocks per metronome click value.
        private const byte DefaultClocksPerMetronomeClick = 24;

        // Default thirty second notes per quarter note value.
        private const byte DefaultThirtySecondNotesPerQuarterNote = 8;

        #endregion

        #region Fields

        // The time signature meta message.
        private MetaMessage message;

        #endregion

        #region Construction

        /// <summary>
        /// Initializes a new instance of the TimeSignature class.
        /// </summary>
        public TimeSignature()
        {
            message = new MetaMessage(MetaType.TimeSignature, 
                MetaMessage.TimeSigLength);

            Numerator = DefaultNumerator;
            Denominator = DefaultDenominator;
            ClocksPerMetronomeClick = DefaultClocksPerMetronomeClick;
            ThirtySecondNotesPerQuarterNote = DefaultThirtySecondNotesPerQuarterNote;
        }

        /// <summary>
        /// Initializes a new instance of the TimeSignature class with the 
        /// specified meta message.
        /// </summary>
        /// <param name="message">
        /// The meta message to use for initialization.
        /// </param>
        /// <exception cref="ArgumentException">
        /// If the specified meta message is not a time signature type.
        /// </exception>
		public TimeSignature(MetaMessage message)
		{
            // Enforce preconditions.
            if(message.Type != MetaType.TimeSignature)
                throw new ArgumentException("Wrong meta message type.",
                    "message");

            this.message = (MetaMessage)message.Clone();
		}

        #endregion

        #region Properties

        /// <summary>
        /// Gets or sets the numerator.
        /// </summary>
        public byte Numerator
        {
            get
            {
                return message[0];
            }
            set
            {
                // Enforce preconditions.
                if(value < 1)
                    throw new ArgumentOutOfRangeException("Numerator", value,
                        "Numerator out of range.");

                message[0] = value;
            }
        }

        /// <summary>
        /// Gets or sets the denominator.
        /// </summary>
        public byte Denominator
        {
            get
            {
                return (byte)Math.Pow(2, message[1]);
            }
            set
            {
                // Enforce preconditions.
                if(value < 2 || value % 2 != 0)
                    throw new ArgumentOutOfRangeException("Denominator", value,
                        "Denominator out of range.");

                message[1] = (byte)Math.Log(value, 2);
            }
        }

        /// <summary>
        /// Gets or sets the clocks per metronome click.
        /// </summary>
        /// <remarks>
        /// Clocks per metronome click determines how many MIDI clocks occur
        /// for each metronome click.
        /// </remarks>
        public byte ClocksPerMetronomeClick
        {
            get
            {
                return message[2];
            }
            set
            {
                message[2] = value;
            }
        }

        /// <summary>
        /// Gets or sets how many thirty second notes there are for each
        /// quarter note.
        /// </summary>
        public byte ThirtySecondNotesPerQuarterNote
        {
            get
            {
                return message[3];
            }
            set
            {
                message[3] = value;
            }
        }

        #endregion

        #endregion

        #region IMetaMessageAdaptor Members

        /// <summary>
        /// Returns a clone of the adapted meta message.
        /// </summary>
        /// <returns>
        /// A clone of the adapted meta message.
        /// </returns>
        public MetaMessage ToMessage()
        {
            return (MetaMessage)message.Clone();
        }

        #endregion
    }
}

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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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