/// <summary>
/// Represents the native callback method for a connection between two ports.
/// </summary>
/// <param name="connection">The native pointer to a MMAL_CONNECTION_T struct.</param>
/// <returns>The value of all flags set against this connection.</returns>
internal virtual int NativeConnectionCallback(MMAL_CONNECTION_T *connection)
{
lock (MMALConnectionImpl.ConnectionLock)
{
if (MMALCameraConfig.Debug)
{
MMALLog.Logger.Debug("Inside native connection callback");
}
var queue = new MMALQueueImpl(connection->Queue);
var bufferImpl = queue.GetBuffer();
if (bufferImpl != null)
{
if (MMALCameraConfig.Debug)
{
bufferImpl.PrintProperties();
}
if (bufferImpl.Length > 0)
{
ConnectionCallbackProvider.FindCallback(this).InputCallback(bufferImpl);
}
this.InputPort.SendBuffer(bufferImpl);
}
else
{
queue = new MMALQueueImpl(connection->Pool->Queue);
bufferImpl = queue.GetBuffer();
if (bufferImpl != null)
{
if (MMALCameraConfig.Debug)
{
bufferImpl.PrintProperties();
}
if (bufferImpl.Length > 0)
{
ConnectionCallbackProvider.FindCallback(this).OutputCallback(bufferImpl);
}
this.OutputPort.SendBuffer(bufferImpl);
}
else
{
MMALLog.Logger.Debug("Buffer could not be obtained by connection callback");
}
}
}
return((int)connection->Flags);
}
/// <summary> /// If it exists, removes a <see cref="IConnectionCallbackHandler"/> on the port specified. /// </summary> /// <param name="port">The port with a created connection.</param> public void RemoveConnectionCallback(PortBase port) => ConnectionCallbackProvider.RemoveCallback(port.ConnectedReference);
/// <summary> /// Registers a <see cref="IConnectionCallbackHandler"/>. /// </summary> /// <param name="handler">The output handler.</param> public void RegisterConnectionCallback(IConnectionCallbackHandler handler) => ConnectionCallbackProvider.RegisterCallback(handler);
