Start playback from beginning if on timeline ende at action start

BUG: 353051
Related to #973

src/monitor/glwidget.cpp

@@ -1606,7 +1606,7 @@ void GLWidget::refreshSceneLayout()
     rootObject()->setProperty("scaley", double(m_rect.height() * m_zoom) / s.height());
 }
 
-void GLWidget::switchPlay(bool play, double speed)
+void GLWidget::switchPlay(bool play, int offset, double speed)
 {
     if (!m_producer || !m_consumer) {
         return;
@@ -1615,9 +1615,10 @@ void GLWidget::switchPlay(bool play, double speed)
         resetZoneMode();
     }
     if (play) {
-        if (m_id == Kdenlive::ClipMonitor && m_consumer->position() == m_producer->get_out() && speed > 0) {
+        if ((m_id == Kdenlive::ClipMonitor || m_id == Kdenlive::ProjectMonitor) && m_consumer->position() == m_producer->get_out() - offset && speed > 0) {
             m_producer->seek(0);
         }
+        qDebug() << "pos: " << m_consumer->position() << "out-offset: " << m_producer->get_out() - offset;
         double current_speed = m_producer->get_speed();
         m_producer->set_speed(speed);
         m_proxy->setSpeed(speed);

src/monitor/glwidget.h

@@ -158,7 +158,7 @@ public slots:
     void slotZoom(bool zoomIn);
     void initializeGL();
     void releaseAnalyse();
-    void switchPlay(bool play, double speed = 1.0);
+    void switchPlay(bool play, int offset = 0, double speed = 1.0);
     void reloadProfile();
     /** @brief Update MLT's consumer scaling 
      *  @returns true is scaling was changed

src/monitor/monitor.cpp

@@ -1308,7 +1308,7 @@ void Monitor::slotRewind(double speed)
         }
     }
     updatePlayAction(true);
-    m_glMonitor->switchPlay(true, speed);
+    m_glMonitor->switchPlay(true, m_offset, speed);
 }
 
 void Monitor::slotForward(double speed, bool allowNormalPlay)
@@ -1322,7 +1322,7 @@ void Monitor::slotForward(double speed, bool allowNormalPlay)
             if (allowNormalPlay) {
                 m_glMonitor->purgeCache();
                 updatePlayAction(true);
-                m_glMonitor->switchPlay(true, 1);
+                m_glMonitor->switchPlay(true, m_offset);
                 return;
             } else {
                 m_speedIndex = 0;
@@ -1336,7 +1336,7 @@ void Monitor::slotForward(double speed, bool allowNormalPlay)
         speed = MonitorManager::speedArray[m_speedIndex];
     }
     updatePlayAction(true);
-    m_glMonitor->switchPlay(true, speed);
+    m_glMonitor->switchPlay(true, m_offset, speed);
 }
 
 void Monitor::slotRewindOneFrame(int diff)
@@ -1454,7 +1454,7 @@ void Monitor::switchPlay(bool play)
     if (!KdenliveSettings::autoscroll()) {
         emit pCore->autoScrollChanged();
     }
-    m_glMonitor->switchPlay(play);
+    m_glMonitor->switchPlay(play, m_offset);
 }
 
 void Monitor::updatePlayAction(bool play)
@@ -1473,7 +1473,7 @@ void Monitor::slotSwitchPlay()
     if (!KdenliveSettings::autoscroll()) {
         emit pCore->autoScrollChanged();
     }
-    m_glMonitor->switchPlay(m_playAction->isActive());
+    m_glMonitor->switchPlay(m_playAction->isActive(), m_offset);
     bool showDropped = false;
     if (m_id == Kdenlive::ClipMonitor) {
         showDropped =  KdenliveSettings::displayClipMonitorInfo() & 0x20;
@@ -1551,7 +1551,7 @@ void Monitor::updateClipProducer(const QString &playlist)
     // TODO
     // Mlt::Producer *prod = new Mlt::Producer(*m_glMonitor->profile(), playlist.toUtf8().constData());
     // m_glMonitor->setProducer(prod, isActive(), render->seekFramePosition());
-    m_glMonitor->switchPlay(true);
+    m_glMonitor->switchPlay(true, m_offset);
 }
 
 void Monitor::slotOpenClip(const std::shared_ptr<ProjectClip> &controller, int in, int out)