Quality of service statistics

Quality of service (QoS) provides a detailed view into how the video engine is performing. TVSDK provides detailed statistics about playback, buffering, and devices.

TVSDK also provides information about the following downloaded resources:

• Playlist/manifest files
• File fragments
• Tracking information for files

Track at the fragment level using load information

You can read quality of service (QoS) information about downloaded resources, such as fragments and tracks, from the LoadInformation class.

1. Implement and register the MediaPlayerEvent.LOAD_INFORMATION_AVAILABLE event listener.

2. Call event.getLoadInformation() to read the relevant data from the event parameter that is passed to the callback.

   NOTE

   For more about LoadInformation, see 3.0 for Android (Java) API docs.

Read QOS playback, buffering, and device statistics

You can read playback, buffering, and device statistics from the QOSProvider class.

The QOSProvider class provides various statistics, including information about buffering, bit rates, frame rates, time data, and so on. It also provides information about the device, such as the manufacturer, model, operating system, SDK version, manufacturer’s device ID, and screen size/density.

1. Instantiate a media player.

2. Create a QOSProvider object and attach it to the media player.

   The QOSProvider constructor takes a player context so that it can retrieve device-specific information.

   // Create Media Player.
   _mediaQosProvider = new QOSProvider(getActivity().getApplicationContext());
   _mediaQosProvider.attachMediaPlayer(_mediaPlayer);
   

3. (Optional) Read the playback statistics.

   One solution to read playback statistics is to have a timer, that periodically fetches the new QoS values from the QOSProvider.

   For example:

   _playbackClock = new Clock(PLAYBACK_CLOCK, 1000); // every 1 second
   _playbackClockEventListener = new Clock.ClockEventListener() {
       @Override
       public void onTick(String name) {
           getActivity().runOnUiThread(new Runnable() {
               @Override
               public void run() {
                   PlaybackInformation playbackInformation =
                     _mediaQosProvider.getPlaybackInformation();
                   setQosItem("Frame rate", (int) playbackInformation.getFrameRate());
                   setQosItem("Dropped frames", (int) playbackInformation.getDroppedFrameCount());
                   setQosItem("Bitrate", (int) playbackInformation.getBitrate());
                   setQosItem("Buffering time", (int) playbackInformation.getBufferingTime());
                   setQosItem("Buffer length", (int) playbackInformation.getBufferLength());
                   setQosItem("Buffer time", (int) playbackInformation.getBufferTime());
                   setQosItem("Empty buffer count", (int) playbackInformation.getEmptyBufferCount());
                   setQosItem("Time to load", (int) playbackInformation.getTimeToLoad());
                   setQosItem("Time to start", (int) playbackInformation.getTimeToStart());
                   setQosItem("Time to prepare", (int) playbackInformation.getTimeToPrepare());
                   setQosItem("Perceived Bandwidth", (int) playbackInformation.getPerceivedBandwidth());
                   playbackInformation.getPerceivedBandwidth());
               }
           });
       };
   };
   
   

4. (Optional) Read the device-specific information.

   // Show device information
   DeviceInformation deviceInfo = new QOSProvider(parent.getApplicationContext()).
                                  getDeviceInformation();
   tv = (TextView) view.findViewById(R.id.aboutDeviceModel);
   tv.setText(parent.getString(R.string.aboutDeviceModel) + " " +
     deviceInfo.getManufacturer() + " - " + deviceInfo.getModel());
   
   tv = (TextView) view.findViewById(R.id.aboutDeviceSoftware);
   tv.setText(parent.getString(R.string.aboutDeviceSoftware) + " " +
     deviceInfo.getOS() + ", SDK: " + deviceInfo.getSDK());
   
   tv = (TextView) view.findViewById(R.id.aboutDeviceResolutin);
   String orientation = parent.getResources().getConfiguration().orientation ==
     Configuration.ORIENTATION_LANDSCAPE ? "landscape" : "portrait";
   tv.setText(parent.getString(R.string.aboutDeviceResolution) + " " +
     deviceInfo.getWidthPixels() + "x" + deviceInfo.getHeightPixels() +
     " (" + orientation + ")");
   
   

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