/// <summary>
/// Enables processing on an input port.
/// </summary>
internal override void EnableInputPort()
{
if (!this.Enabled)
{
this.ManagedInputCallback = InputCallbackProvider.FindCallback(this);
this.NativeCallback = new MMALPort.MMAL_PORT_BH_CB_T(this.NativeInputPortCallback);
IntPtr ptrCallback = Marshal.GetFunctionPointerForDelegate(this.NativeCallback);
MMALLog.Logger.Debug("Enabling input port.");
if (this.ManagedInputCallback == null)
{
MMALLog.Logger.Warn("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.");
}
this.InitialiseBufferPool();
}
if (!this.Enabled)
{
throw new PiCameraError("Unknown error occurred whilst enabling port");
}
}
/// <summary> /// If it exists, removes a <see cref="IInputCallbackHandler"/> on this component's input port. /// </summary> public void RemoveInputCallback() => InputCallbackProvider.RemoveCallback(this.Inputs[0]);
/// <summary> /// Registers a <see cref="IInputCallbackHandler"/>. /// </summary> /// <param name="handler">The input handler.</param> public void RegisterInputCallback(IInputCallbackHandler handler) => InputCallbackProvider.RegisterCallback(handler);
