WorkflowRenderer: Detect when something went wrong.

src/LibVLCpp/VLCMediaPlayer.cpp

@@ -113,7 +113,7 @@ void                            MediaPlayer::callbacks( const libvlc_event_t* ev
         self->emit snapshotTaken( event->u.media_player_snapshot_taken.psz_filename );
         break;
     case libvlc_MediaPlayerEncounteredError:
-        qDebug() << "libvlc_MediaPlayerEncounteredError received."
+        qDebug() << '[' << (void*)self << "] libvlc_MediaPlayerEncounteredError received."
                 << "This is not looking good...";
         self->emit errorEncountered();
         break ;

src/Renderer/GenericRenderer.h

@@ -212,6 +212,15 @@ signals:
      *  \sa     stopped();
      */
     void                            endReached();
+
+    /**
+     *  \brief  Emited when something went wrong with the render.
+     *
+     *  The cause may vary depending on the underlying renderer, though this will
+     *  almost always be caused by a missing codec.
+     */
+    void                error();
+
 };
 
 #endif // GENERICRENDERER_H

src/Renderer/WorkflowRenderer.cpp

@@ -68,6 +68,7 @@ void    WorkflowRenderer::initializeRenderer()
     //Media player part: to update PreviewWidget
     connect( m_mediaPlayer, SIGNAL( playing() ),    this,   SIGNAL( playing() ), Qt::DirectConnection );
     connect( m_mediaPlayer, SIGNAL( paused() ),     this,   SIGNAL( paused() ), Qt::DirectConnection );
+    connect( m_mediaPlayer, SIGNAL( errorEncountered() ), this, SLOT( errorEncountered() ) );
     //FIXME:: check if this doesn't require Qt::QueuedConnection
     connect( m_mediaPlayer, SIGNAL( stopped() ),    this,   SIGNAL( endReached() ) );
 }
@@ -409,3 +410,10 @@ WorkflowRenderer::mainWorkflowLenghtChanged( qint64 /*newLength*/ )
 //    }
 //    m_oldLength = newLength;
 }
+
+void
+WorkflowRenderer::errorEncountered()
+{
+    stop();
+    emit error();
+}

src/Renderer/WorkflowRenderer.h

@@ -304,6 +304,13 @@ class   WorkflowRenderer : public GenericRenderer
          */
         void                mainWorkflowLenghtChanged( qint64 newLength );
 
+        /**
+         *  \brief          Used to catch an error in the rendering part
+         *
+         *  Most likely, this will be called if the required codec aren't found.
+         *  This will stop the render and emit the error() signal.
+         */
+        void                errorEncountered();
 };
 
 #endif // WORKFLOWRENDERER_H