#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.ComponentModel;
using System.Runtime.InteropServices;
using Multimedia;
namespace Multimedia.Midi
{
/// <summary>
/// The base class for all MIDI devices.
/// </summary>
public abstract class Device : IDevice
{
#region Device Members
#region Win32 Midi Device Functions
[DllImport("winmm.dll")]
private static extern int midiConnect(int handleA, int handleB, int reserved);
[DllImport("winmm.dll")]
private static extern int midiDisconnect(int handleA, int handleB, int reserved);
protected const int CALLBACK_FUNCTION = 0x30000;
#endregion
// Size of the MidiHeader structure.
protected static readonly int SizeOfMidiHeader;
// For marshaling event handler and sink calls.
private ISynchronizeInvoke synchronizingObject = null;
static Device()
{
SizeOfMidiHeader = Marshal.SizeOf(typeof(MidiHeader));
}
/// <summary>
/// Connects a MIDI InputDevice to a MIDI thru or OutputDevice, or
/// connects a MIDI thru device to a MIDI OutputDevice.
/// </summary>
/// <param name="handleA">
/// Handle to a MIDI InputDevice or a MIDI thru device (for thru
/// devices, this handle must belong to a MIDI OutputDevice).
/// </param>
/// <param name="handleB">
/// Handle to the MIDI OutputDevice or thru device.
/// </param>
/// <exception cref="DeviceException">
/// If an error occurred while connecting the two devices.
/// </exception>
public static void Connect(int handleA, int handleB)
{
int result = midiConnect(handleA, handleB, 0);
if(result != DeviceException.MMSYSERR_NOERROR)
{
throw new DeviceException(result);
}
}
/// <summary>
/// Disconnects a MIDI InputDevice from a MIDI thru or OutputDevice, or
/// disconnects a MIDI thru device from a MIDI OutputDevice.
/// </summary>
/// <param name="handleA">
/// Handle to a MIDI InputDevice or a MIDI thru device.
/// </param>
/// <param name="handleB">
/// Handle to the MIDI OutputDevice to be disconnected.
/// </param>
/// <exception cref="DeviceException">
/// If an error occurred while disconnecting the two devices.
/// </exception>
public static void Disconnect(int handleA, int handleB)
{
int result = midiDisconnect(handleA, handleB, 0);
if(result != DeviceException.MMSYSERR_NOERROR)
{
throw new DeviceException(result);
}
}
// Raises the BufferFinished event.
protected virtual void OnBufferFinished(BufferFinishedEventArgs e)
{
EventHandler<BufferFinishedEventArgs> handler = BufferFinished;
if(handler != null)
{
handler(this, e);
}
}
#endregion
#region IDevice Members
/// <summary>
/// Occurs when the Device is finished with a buffer.
/// </summary>
public event EventHandler<BufferFinishedEventArgs> BufferFinished;
/// <summary>
/// Closes the MIDI device.
/// </summary>
public abstract void Close();
/// <summary>
/// Resets the MIDI device.
/// </summary>
public abstract void Reset();
/// <summary>
/// Gets the device handle.
/// </summary>
public abstract int Handle
{
get;
}
/// <summary>
/// Gets or sets the object used to marshal event-handler and sink calls.
/// </summary>
public ISynchronizeInvoke SynchronizingObject
{
get
{
return synchronizingObject;
}
set
{
synchronizingObject = value;
}
}
#endregion
#region IDisposable
/// <summary>
/// Disposes of the MIDI device.
/// </summary>
public abstract void Dispose();
#endregion
}
}