Don't rebuild existing audio thumbs for playlist on project opening, display...

Don't rebuild existing audio thumbs for playlist on project opening, display playlist audio thumbs in clip monitor

src/jobs/audiothumbjob.cpp

@@ -368,6 +368,10 @@ bool AudioThumbJob::startJob()
         // Generate one thumb per stream
         m_audioStream = stream;
         m_cachePath = m_binClip->getAudioThumbPath(stream);
+        if (QFile::exists(m_cachePath)) {
+            // Audio thumb already exists
+            continue;
+        }
         m_done = false;
         bool ok = false;
         if (type == ClipType::Playlist) {

src/lib/audio/audioStreamInfo.cpp

@@ -28,6 +28,8 @@ AudioStreamInfo::AudioStreamInfo(const std::shared_ptr<Mlt::Producer> &producer,
     if (playlist && streams == 0) {
         // Playlist clips do not provide stream info
         m_audioStreams.insert(0, i18n("Audio"));
+        // TODO: compute playlist channels
+        m_audioChannels.insert(0, 2);
     }
     int streamIndex = 1;
     for (int ix = 0; ix < streams; ix++) {

src/monitor/monitor.cpp

@@ -1646,7 +1646,7 @@ void Monitor::slotOpenClip(const std::shared_ptr<ProjectClip> &controller, int i
             m_controller->getMarkerModel()->registerSnapModel(m_snaps);
             m_glMonitor->getControllerProxy()->setClipProperties(controller->clipId().toInt(), controller->clipType(), controller->hasAudioAndVideo(), controller->clipName());
             if (!m_controller->hasVideo() || KdenliveSettings::displayClipMonitorInfo() & 0x10) {
-                qDebug()<<"=======\n\nSETTING AUDIO DATA IN MON\n\n=========";
+                qDebug()<<"=======\n\nSETTING AUDIO DATA IN MON";
                 if (m_audioMeterWidget->audioChannels == 0) {
                     m_glMonitor->getControllerProxy()->setAudioThumb();
                 } else {

src/monitor/view/kdenliveclipmonitor.qml

@@ -217,7 +217,7 @@ Item {
                 height: isAudioClip ? parent.height : parent.height / 6
                 //font.pixelSize * 3
                 width: parent.width
-                visible: (root.permanentAudiothumb || root.showAudiothumb) && (isAudioClip || controller.clipType == ProducerType.AV)
+                visible: (root.permanentAudiothumb || root.showAudiothumb) && (isAudioClip || controller.clipType == ProducerType.AV || controller.clipType == ProducerType.Playlist)
                 onStateVisibleChanged: {
                     // adjust monitor image size
                     if (stateVisible && root.permanentAudiothumb && audioThumb.visible) {

src/timeline2/view/qml/timelineitems.cpp

@@ -150,6 +150,9 @@ public:
             }
         }
         qreal indicesPrPixel = qreal(m_outPoint - m_inPoint) / width() * m_precisionFactor;
+        if (m_outPoint == m_inPoint) {
+            return;
+        }
         QPen pen = painter->pen();
         pen.setColor(m_color);
         painter->setBrush(m_color);