/// <summary>
/// The native callback MMAL passes buffer headers to
/// </summary>
/// <param name="port">The port the buffer is sent to</param>
/// <param name="buffer">The buffer header</param>
internal override void NativeOutputPortCallback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
lock (MMALPortBase.OutputLock)
{
var bufferImpl = new MMALBufferImpl(buffer);
if (MMALCameraConfig.Debug)
{
bufferImpl.PrintProperties();
}
if (bufferImpl.Length > 0)
{
this.ManagedOutputCallback(bufferImpl, this);
}
//Ensure we release the buffer before any signalling or we will cause a memory leak due to there still being a reference count on the buffer.
this.ReleaseOutputBuffer(bufferImpl);
//If this buffer signals the end of data stream, allow waiting thread to continue.
if (bufferImpl.Properties.Any(c => c == MMALBufferProperties.MMAL_BUFFER_HEADER_FLAG_FRAME_END ||
c == MMALBufferProperties.MMAL_BUFFER_HEADER_FLAG_TRANSMISSION_FAILED))
{
MMALLog.Logger.Debug("End of stream. Signaling completion...");
if (this.Trigger != null && this.Trigger.CurrentCount > 0)
{
this.Trigger.Signal();
}
}
}
}
internal override void NativeInputPortCallback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
lock (MMALPortBase.InputLock)
{
var bufferImpl = new MMALBufferImpl(buffer);
if (MMALCameraConfig.Debug)
{
bufferImpl.PrintProperties();
}
this.ReleaseInputBuffer(bufferImpl);
}
}
/// <summary>
/// The native callback MMAL passes buffer headers to.
/// </summary>
/// <param name="port">The port the buffer is sent to.</param>
/// <param name="buffer">The buffer header.</param>
internal override void NativeOutputPortCallback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
lock (MMALPortBase.OutputLock)
{
if (MMALCameraConfig.Debug)
{
MMALLog.Logger.Debug("In native output callback");
}
var bufferImpl = new MMALBufferImpl(buffer);
if (MMALCameraConfig.Debug)
{
bufferImpl.PrintProperties();
}
var triggered = this.Trigger != null && this.Trigger.CurrentCount == 0;
var failed = bufferImpl.Properties.Any(c => c == MMALBufferProperties.MMAL_BUFFER_HEADER_FLAG_TRANSMISSION_FAILED);
var eos = bufferImpl.Properties.Any(c => c == MMALBufferProperties.MMAL_BUFFER_HEADER_FLAG_FRAME_END ||
c == MMALBufferProperties.MMAL_BUFFER_HEADER_FLAG_EOS) || this.ComponentReference.ForceStopProcessing;
if ((bufferImpl.CheckState() && bufferImpl.Length > 0 && !eos && !failed && !triggered) || (eos && !triggered))
{
this.ManagedOutputCallback.Callback(bufferImpl);
}
// Ensure we release the buffer before any signalling or we will cause a memory leak due to there still being a reference count on the buffer.
this.ReleaseOutputBuffer(bufferImpl);
// If this buffer signals the end of data stream, allow waiting thread to continue.
if (eos || failed)
{
if (this.Trigger != null && this.Trigger.CurrentCount > 0)
{
MMALLog.Logger.Debug("End of stream. Signaling completion...");
this.Trigger.Signal();
}
}
}
}
