/// <summary>
/// Opens the stream
/// </summary>
public void Open()
{
if (IntPtr.Zero != _handle)
{
throw new InvalidOperationException("The device is already open");
}
_sendEventBuffer = Marshal.AllocHGlobal(64 * 1024);
var di = _deviceIndex;
var h = IntPtr.Zero;
_CheckOutResult(midiStreamOpen(ref h, ref di, 1, _outCallback, 0, CALLBACK_FUNCTION));
Interlocked.Exchange(ref _handle, h);
_state = MidiStreamState.Paused;
}
/// <summary>
/// Pauses the stream
/// </summary>
public void Pause()
{
if (IntPtr.Zero == _handle)
{
throw new InvalidOperationException("The stream is closed.");
}
switch (_state)
{
case MidiStreamState.Started:
_CheckOutResult(midiStreamPause(_handle));
_state = MidiStreamState.Paused;
Interlocked.Exchange(ref _tempoSyncMessagesSentCount, 0);
break;
}
}
/// <summary>
/// Closes the stream
/// </summary>
public void Close()
{
_DisposeTimer();
if (IntPtr.Zero != _handle)
{
Stop();
Reset();
_CheckOutResult(midiStreamClose(_handle));
Interlocked.Exchange(ref _handle, IntPtr.Zero);
Marshal.FreeHGlobal(_sendEventBuffer);
_sendEventBuffer = IntPtr.Zero;
GC.SuppressFinalize(this);
_state = MidiStreamState.Closed;
}
}
/// <summary>
/// Closes the stream
/// </summary>
public override void Close()
{
_DisposeTimer();
if (IntPtr.Zero != Handle)
{
Stop();
Reset();
_CheckOutResult(midiStreamClose(Handle));
Handle = IntPtr.Zero;
GC.SuppressFinalize(this);
Interlocked.Exchange(ref _sendQueue, null);
Interlocked.Exchange(ref _sendQueuePosition, 0);
_state = MidiStreamState.Closed;
}
}
/// <summary>
/// Opens the stream
/// </summary>
public override void Open()
{
if (IntPtr.Zero != Handle)
{
throw new InvalidOperationException("The device is already open");
}
var di = Index;
var h = IntPtr.Zero;
Interlocked.Exchange(ref _sendQueue, null);
Interlocked.Exchange(ref _sendQueuePosition, 0);
_CheckOutResult(midiStreamOpen(ref h, ref di, 1, _outCallback, 0, CALLBACK_FUNCTION));
Handle = h;
_state = MidiStreamState.Paused;
}
/// <summary>
/// Starts the stream
/// </summary>
public void Start()
{
if (IntPtr.Zero == _handle)
{
throw new InvalidOperationException("The stream is closed.");
}
switch (_state)
{
case MidiStreamState.Paused:
case MidiStreamState.Stopped:
var tmp = Tempo;
var spb = 60 / tmp;
var ms = unchecked ((int)(Math.Round((1000 * spb) / 24)));
Interlocked.Exchange(ref _tempoSyncMessagesSentCount, 0);
_RestartTimer(ms);
_CheckOutResult(midiStreamRestart(_handle));
_state = MidiStreamState.Started;
break;
}
}
/// <summary>
/// Stops the stream
/// </summary>
public void Stop()
{
if (IntPtr.Zero == _handle)
{
throw new InvalidOperationException("The stream is closed.");
}
switch (_state)
{
case MidiStreamState.Paused:
case MidiStreamState.Started:
_DisposeTimer();
_CheckOutResult(midiStreamStop(_handle));
Interlocked.Exchange(ref _tempoSyncMessagesSentCount, 0);
_state = MidiStreamState.Stopped;
Interlocked.Exchange(ref _sendQueuePosition, 0);
if (null != _sendQueue)
{
Interlocked.Exchange(ref _sendQueue, null);
}
break;
}
}
