/*===================================================================== QGroundControl Open Source Ground Control Station (c) 2009, 2015 QGROUNDCONTROL PROJECT This file is part of the QGROUNDCONTROL project QGROUNDCONTROL is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. QGROUNDCONTROL is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with QGROUNDCONTROL. If not, see . ======================================================================*/ #include #include #include #include #include "ScreenToolsController.h" #include "FlightDisplayViewController.h" const char* kMainFlightDisplayViewControllerGroup = "FlightDisplayViewController"; FlightDisplayViewController::FlightDisplayViewController(QObject *parent) : QObject(parent) , _videoRunning(false) { /* * This is the receiving end of an UDP RTP stream. The sender can be setup with this command: * * gst-launch-1.0 uvch264src initial-bitrate=1000000 average-bitrate=1000000 iframe-period=1000 name=src auto-start=true src.vidsrc ! \ * video/x-h264,width=1280,height=720,framerate=24/1 ! h264parse ! rtph264pay ! udpsink host=192.168.1.9 port=5000 * * Where the main parameters are: * * uvch264src: Your h264 video source (the example above uses a Logitech C920 on an Raspberry PI 2+ or Odroid C1 * host=192.168.1.9 This is the IP address of QGC. You can use Avahi/Zeroconf to find QGC using the "_qgroundcontrol._udp" service. * * Advanced settings (you should probably read the gstreamer documentation before changing these): * * initial-bitrate=1000000 average-bitrate=1000000 * The bit rate to use. The greater, the better quality at the cost of higher bandwidth. * * width=1280,height=720,framerate=24/1 * The video resolution and frame rate. This depends on the camera used. * * iframe-period=1000 * Interval between iFrames. The greater the interval the lesser bandwidth at the cost of a longer time to recover from lost packets. * * Do not change anything else unless you know what you are doing. Any other change will require a matching change on the receiving end. * */ _videoSurface = new VideoSurface; _videoReceiver = new VideoReceiver(this); _videoReceiver->setUri(QLatin1Literal("udp://0.0.0.0:5000")); #if defined(QGC_GST_STREAMING) _videoReceiver->setVideoSink(_videoSurface->videoSink()); connect(&_frameTimer, &QTimer::timeout, this, &FlightDisplayViewController::_updateTimer); _frameTimer.start(1000); #endif } FlightDisplayViewController::~FlightDisplayViewController() { } #if defined(QGC_GST_STREAMING) void FlightDisplayViewController::_updateTimer(void) { if(_videoRunning) { time_t elapsed = 0; if(_videoSurface) { elapsed = time(0) - _videoSurface->lastFrame(); } if(elapsed > 2) { _videoRunning = false; _videoSurface->setLastFrame(0); emit videoRunningChanged(); } } else { if(_videoSurface && _videoSurface->lastFrame()) { if(!_videoRunning) { _videoRunning = true; emit videoRunningChanged(); } } } } #endif