/// <summary>
/// Register a new <see cref="OutputCallbackHandlerBase"/>.
/// </summary>
/// <param name="handler">The callback handler.</param>
public static void RegisterCallback(OutputCallbackHandlerBase handler)
{
if (handler?.WorkingPort == null)
{
throw new NullReferenceException("Callback handler not configured correctly.");
}
if (WorkingHandlers.ContainsKey(handler.WorkingPort))
{
WorkingHandlers[handler.WorkingPort] = handler;
}
else
{
WorkingHandlers.Add(handler.WorkingPort, handler);
}
}
/// <summary>
/// Enables processing on a port.
/// </summary>
internal override void EnableControlPort()
{
if (!this.Enabled)
{
this.ManagedControlCallback = OutputCallbackProvider.FindCallback(this);
this.NativeCallback = new MMALPort.MMAL_PORT_BH_CB_T(this.NativeControlPortCallback);
IntPtr ptrCallback = Marshal.GetFunctionPointerForDelegate(this.NativeCallback);
MMALLog.Logger.Debug("Enabling control port.");
if (this.ManagedControlCallback == null)
{
MMALLog.Logger.Debug("Callback null");
MMALCheck(MMALPort.mmal_port_enable(this.Ptr, IntPtr.Zero), "Unable to enable port.");
}
else
{
MMALCheck(MMALPort.mmal_port_enable(this.Ptr, ptrCallback), "Unable to enable port.");
}
}
}
/// <summary> /// Registers a <see cref="OutputCallbackHandlerBase"/>. /// </summary> /// <param name="handler">The output handler.</param> public void RegisterOutputCallback(OutputCallbackHandlerBase handler) => OutputCallbackProvider.RegisterCallback(handler);
