/// <summary>
/// Delegate to process the buffer header containing image data
/// </summary>
/// <param name="buffer">The buffer header we're currently processing</param>
/// <param name="port">The port we're currently processing on</param>
public override void ManagedOutputCallback(MMALBufferImpl buffer, MMALPortBase port)
{
if (this.PrepareSplit && buffer.Properties.Any(c => c == MMALBufferProperties.MMAL_BUFFER_HEADER_FLAG_CONFIG))
{
((VideoStreamCaptureHandler)this.Handler).Split();
this.LastSplit = DateTime.Now;
this.PrepareSplit = false;
}
//Ensure that if we need to split then this is done before processing the buffer data.
if (this.Split != null)
{
if (!this.LastSplit.HasValue)
{
this.LastSplit = DateTime.Now;
}
if (DateTime.Now.CompareTo(this.CalculateSplit()) > 0)
{
this.PrepareSplit = true;
port.SetParameter(MMALParametersVideo.MMAL_PARAMETER_VIDEO_REQUEST_I_FRAME, true);
}
}
base.ManagedOutputCallback(buffer, port);
}
/// <summary>
/// Remove a callback handler for a given port.
/// </summary>
/// <param name="port">The port we are removing the callback handler on.</param>
public static void RemoveCallback(MMALPortBase port)
{
if (WorkingHandlers.ContainsKey(port))
{
WorkingHandlers.Remove(port);
}
}
/// <summary>
/// This is the camera's control port callback function. The callback is used if
/// MMALCameraConfig.SetChangeEventRequest is set to true.
/// </summary>
/// <seealso cref="MMALCameraConfig.SetChangeEventRequest" />
/// <param name="buffer">The buffer header being sent from MMAL.</param>
/// <param name="port">The managed control port instance.</param>
internal unsafe void CameraControlCallback(MMALBufferImpl buffer, MMALPortBase port)
{
if (buffer.Cmd == MMALEvents.MMAL_EVENT_PARAMETER_CHANGED)
{
var data = (MMAL_EVENT_PARAMETER_CHANGED_T *)buffer.Data;
if (data->Hdr.Id == MMALParametersCamera.MMAL_PARAMETER_CAMERA_SETTINGS)
{
var settings = (MMAL_PARAMETER_CAMERA_SETTINGS_T *)data;
MMALLog.Logger.Debug($"Analog gain num {settings->AnalogGain.Num}");
MMALLog.Logger.Debug($"Analog gain den {settings->AnalogGain.Den}");
MMALLog.Logger.Debug($"Exposure {settings->Exposure}");
MMALLog.Logger.Debug($"Focus position {settings->FocusPosition}");
}
}
else if (buffer.Cmd == MMALEvents.MMAL_EVENT_ERROR)
{
MMALLog.Logger.Info("No data received from sensor. Check all connections, including the Sunny one on the camera board");
}
else
{
MMALLog.Logger.Info("Received unexpected camera control callback event");
}
}
/// <summary>
/// Finds and returns a <see cref="OutputCallbackHandlerBase"/> for a given port. If no handler is registered, a
/// <see cref="DefaultOutputCallbackHandler"/> will be returned.
/// </summary>
/// <param name="port">The port we are retrieving the callback handler on.</param>
/// <returns>A <see cref="OutputCallbackHandlerBase"/> for a given port. If no handler is registered, a
/// <see cref="DefaultOutputCallbackHandler"/> will be returned.</returns>
public static OutputCallbackHandlerBase FindCallback(MMALPortBase port)
{
if (WorkingHandlers.ContainsKey(port))
{
return(WorkingHandlers[port]);
}
return(new DefaultOutputCallbackHandler(port));
}
protected InputCallbackHandlerBase(MMALPortBase port, MMALEncoding encodingType)
{
this.WorkingPort = port;
this.EncodingType = encodingType;
}
protected InputCallbackHandlerBase(MMALPortBase port)
{
this.WorkingPort = port;
}
public DefaultOutputCallbackHandler(MMALPortBase port, MMALEncoding encodingType)
: base(port, encodingType)
{
}
public DefaultOutputCallbackHandler(MMALPortBase port)
: base(port)
{
}
/// <summary> /// If it exists, removes a <see cref="ConnectionCallbackHandlerBase"/> on the port specified. /// </summary> /// <param name="port">The port with a created connection.</param> public void RemoveConnectionCallback(MMALPortBase port) => ConnectionCallbackProvider.RemoveCallback(port.ConnectedReference);
public VideoOutputCallbackHandler(MMALPortBase port, MMALEncoding encoding)
: base(port, encoding)
{
}
public VideoOutputCallbackHandler(MMALPortBase port)
: base(port)
{
}
