Configure Video Stream: Allow video stream restart and reconnect after changing video encoding.

src/FlightDisplay/VideoManager.cc

 /****************************************************************************
  *
- *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *   (c) 2009-2019 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
  *
  * QGroundControl is licensed according to the terms in the file
  * COPYING.md in the root of the source code directory.
@@ -206,28 +206,28 @@ VideoManager::_videoSourceChanged()
     emit hasVideoChanged();
     emit isGStreamerChanged();
     emit isAutoStreamChanged();
-    _restartVideo();
+    restartVideo();
 }
 
 //-----------------------------------------------------------------------------
 void
 VideoManager::_udpPortChanged()
 {
-    _restartVideo();
+    restartVideo();
 }
 
 //-----------------------------------------------------------------------------
 void
 VideoManager::_rtspUrlChanged()
 {
-    _restartVideo();
+    restartVideo();
 }
 
 //-----------------------------------------------------------------------------
 void
 VideoManager::_tcpUrlChanged()
 {
-    _restartVideo();
+    restartVideo();
 }
 
 //-----------------------------------------------------------------------------
@@ -275,7 +275,14 @@ VideoManager::_updateSettings()
         return;
     //-- Auto discovery
     if(_activeVehicle && _activeVehicle->dynamicCameras()) {
-        QGCVideoStreamInfo* pInfo  = _activeVehicle->dynamicCameras()->currentStreamInstance();
+        QGCCameraControl* pCamera = _activeVehicle->dynamicCameras()->currentCameraInstance();
+        if(pCamera) {
+            Fact *fact = pCamera->videoEncoding();
+            if (fact) {
+                _videoReceiver->setVideoDecoder(static_cast<VideoReceiver::VideoEncoding>(fact->rawValue().toInt()));
+            }
+        }
+        QGCVideoStreamInfo* pInfo = _activeVehicle->dynamicCameras()->currentStreamInstance();
         if(pInfo) {
             qCDebug(VideoManagerLog) << "Configure primary stream: " << pInfo->uri();
             switch(pInfo->type()) {
@@ -329,7 +336,7 @@ VideoManager::_updateSettings()
 
 //-----------------------------------------------------------------------------
 void
-VideoManager::_restartVideo()
+VideoManager::restartVideo()
 {
 #if defined(QGC_GST_STREAMING)
     qCDebug(VideoManagerLog) << "Restart video streaming";
@@ -350,13 +357,13 @@ VideoManager::_setActiveVehicle(Vehicle* vehicle)
             if(pCamera) {
                 pCamera->stopStream();
             }
-            disconnect(_activeVehicle->dynamicCameras(), &QGCCameraManager::streamChanged, this, &VideoManager::_restartVideo);
+            disconnect(_activeVehicle->dynamicCameras(), &QGCCameraManager::streamChanged, this, &VideoManager::restartVideo);
         }
     }
     _activeVehicle = vehicle;
     if(_activeVehicle) {
         if(_activeVehicle->dynamicCameras()) {
-            connect(_activeVehicle->dynamicCameras(), &QGCCameraManager::streamChanged, this, &VideoManager::_restartVideo);
+            connect(_activeVehicle->dynamicCameras(), &QGCCameraManager::streamChanged, this, &VideoManager::restartVideo);
             QGCCameraControl* pCamera = _activeVehicle->dynamicCameras()->currentCameraInstance();
             if(pCamera) {
                 pCamera->resumeStream();
@@ -364,7 +371,7 @@ VideoManager::_setActiveVehicle(Vehicle* vehicle)
         }
     }
     emit autoStreamConfiguredChanged();
-    _restartVideo();
+    restartVideo();
 }
 
 //----------------------------------------------------------------------------------------

src/FlightDisplay/VideoManager.h

 /****************************************************************************
  *
- *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *   (c) 2009-2019 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
  *
  * QGroundControl is licensed according to the terms in the file
  * COPYING.md in the root of the source code directory.
@@ -62,6 +62,7 @@ public:
     double      thermalHfov         ();
     bool        autoStreamConfigured();
     bool        hasThermal          ();
+    void        restartVideo        ();
 
     VideoReceiver*  videoReceiver           () { return _videoReceiver; }
     VideoReceiver*  thermalVideoReceiver    () { return _thermalVideoReceiver; }
@@ -99,7 +100,6 @@ private slots:
     void _updateUVC                 ();
     void _setActiveVehicle          (Vehicle* vehicle);
     void _aspectRatioChanged        ();
-    void _restartVideo              ();
 
 private:
     void _updateSettings            ();

src/VideoStreaming/VideoReceiver.h

 /****************************************************************************
  *
- *   (c) 2009-2018 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *   (c) 2009-2019 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
  *
  * QGroundControl is licensed according to the terms in the file
  * COPYING.md in the root of the source code directory.
@@ -34,6 +34,13 @@ class VideoReceiver : public QObject
 {
     Q_OBJECT
 public:
+    enum VideoEncoding {
+        H264_SW = 1,
+        H264_HW = 2,
+        H265_SW = 3,
+        H265_HW = 4
+    };
+
 #if defined(QGC_GST_STREAMING)
     Q_PROPERTY(bool             recording           READ    recording           NOTIFY recordingChanged)
 #endif
@@ -47,11 +54,7 @@ public:
     ~VideoReceiver();
 
 #if defined(QGC_GST_STREAMING)
-    virtual bool            running         () { return _running;   }
     virtual bool            recording       () { return _recording; }
-    virtual bool            streaming       () { return _streaming; }
-    virtual bool            starting        () { return _starting;  }
-    virtual bool            stopping        () { return _stopping;  }
 #endif
 
     virtual VideoSurface*   videoSurface    () { return _videoSurface; }
@@ -64,6 +67,8 @@ public:
 
     virtual void        setShowFullScreen   (bool show) { _showFullScreen = show; emit showFullScreenChanged(); }
 
+    void                  setVideoDecoder   (VideoEncoding encoding);
+
 signals:
     void videoRunningChanged                ();
     void imageFileChanged                   ();
@@ -86,9 +91,7 @@ public slots:
 protected slots:
     virtual void _updateTimer               ();
 #if defined(QGC_GST_STREAMING)
-    virtual void _timeout                   ();
-    virtual void _connected                 ();
-    virtual void _socketError               (QAbstractSocket::SocketError socketError);
+    virtual void _restart_timeout           ();
     virtual void _handleError               ();
     virtual void _handleEOS                 ();
     virtual void _handleStateChanged        ();
@@ -132,14 +135,11 @@ protected:
 
     //-- Wait for Video Server to show up before starting
     QTimer          _frameTimer;
-    QTimer          _timer;
-    QTcpSocket*     _socket;
-    bool            _serverPresent;
-    int             _rtspTestInterval_ms;
+    QTimer          _restart_timer;
+    int             _restart_time_ms;
 
     //-- RTSP UDP reconnect timeout
     uint64_t        _udpReconnect_us;
-
 #endif
 
     QString         _uri;
@@ -149,5 +149,8 @@ protected:
     bool            _videoRunning;
     bool            _showFullScreen;
     VideoSettings*  _videoSettings;
+    const char*     _depayName;
+    const char*     _parserName;
+    const char*     _decoderName;
 };