/// <summary>
/// Handles the port events for all message types.
/// </summary>
/// <param name="umsg">Type of message.</param>
/// <param name="param1">First parameter.</param>
/// <param name="param2">Second parameter.</param>
/// <returns>Returns true if the <paramref name="umsg"/> has been handled.</returns>
private bool HandlePortEvent(uint umsg, IntPtr param1, IntPtr param2)
{
bool handled = true;
switch (umsg)
{
case NativeMethods.MIM_DATA:
NextPortEventReceiver.PortEvent(new MidiPortEvent(MidiPortEventType.ShortData, param1.ToInt32(), param2.ToInt32()));
break;
case NativeMethods.MIM_LONGDATA:
var buffer = BufferManager.FindBuffer(param1);
if (buffer != null)
{
if (buffer.BytesRecorded > 0)
{
NextPortEventReceiver.PortEvent(new MidiPortEvent(MidiPortEventType.LongData, buffer, param2.ToInt32()));
if (AutoReturnBuffers)
{
BufferManager.ReturnBuffer(buffer);
}
}
else
{
BufferManager.ReturnBuffer(buffer);
}
}
break;
case NativeMethods.MIM_MOREDATA:
NextPortEventReceiver.PortEvent(new MidiPortEvent(MidiPortEventType.MoreData, param1.ToInt32(), param2.ToInt32()));
break;
case NativeMethods.MIM_ERROR:
NextPortEventReceiver.PortEvent(new MidiPortEvent(MidiPortEventType.ShortError, param1.ToInt32(), param2.ToInt32()));
break;
case NativeMethods.MIM_LONGERROR:
var errBuffer = BufferManager.FindBuffer(param1);
if (errBuffer != null)
{
NextPortEventReceiver.PortEvent(new MidiPortEvent(MidiPortEventType.LongError, errBuffer, param2.ToInt32()));
if (AutoReturnBuffers)
{
BufferManager.ReturnBuffer(errBuffer);
}
}
break;
default:
handled = false;
break;
}
return(handled);
}
/// <summary>
/// Receives a port event.
/// </summary>
/// <param name="midiEvent">The port event. Must not be null.</param>
/// <remarks>A new event is created with a new timestamp and send to the component's successors.</remarks>
public override void PortEvent(MidiPortEvent midiEvent)
{
Check.IfArgumentNull(midiEvent, nameof(midiEvent));
if (NextPortEventReceiver != null)
{
MidiPortEvent newEvent;
if (midiEvent.IsShortMessage)
{
newEvent = new MidiPortEvent(midiEvent.RecordType, midiEvent.Data, GetCurrentTimestamp());
}
else
{
newEvent = new MidiPortEvent(midiEvent.RecordType, midiEvent.Buffer, GetCurrentTimestamp());
}
NextPortEventReceiver.PortEvent(newEvent);
}
}
/// <summary>
/// Dispatches the <paramref name="record"/> to the appropriate receiver component.
/// </summary>
/// <param name="record">Must not be null.</param>
private void DispatchRecord(MidiPortEvent record)
{
Contract.Requires(record != null);
Check.IfArgumentNull(record, "record");
if (NextReceiver != null)
{
switch (record.RecordType)
{
case MidiPortEventType.MoreData:
case MidiPortEventType.ShortData:
NextReceiver.ShortData(record.Data, (int)record.Timestamp);
break;
case MidiPortEventType.LongData:
NextReceiver.LongData(record.Buffer, (int)record.Timestamp);
break;
}
}
if (NextErrorReceiver != null)
{
switch (record.RecordType)
{
case MidiPortEventType.ShortError:
NextErrorReceiver.ShortError(record.Data, (int)record.Timestamp);
break;
case MidiPortEventType.LongError:
NextErrorReceiver.LongError(record.Buffer, (int)record.Timestamp);
break;
}
}
if (NextPortEventReceiver != null)
{
NextPortEventReceiver.PortEvent(record);
}
}