Add support for selecting audio/video tracks

Implement this for the gstreamer backend. The API
for subtitle tracks is also there, but we do not
support displaying those for the moment.

Change-Id: Ia561656d63c33ac4ea5d167846d4535820180fb3
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Doris Verria <doris.verria@qt.io>

1 files changed, 12 insertions, 11 deletions

diff --git a/src/multimedia/playback/qmediaplayer.h b/src/multimedia/playback/qmediaplayer.h
index 6df346e50..58f5201ce 100644
--- a/src/multimedia/playback/qmediaplayer.h
+++ b/src/multimedia/playback/qmediaplayer.h
@@ -123,19 +123,17 @@ public:
     bool setAudioOutput(const QAudioDeviceInfo &device);
     QAudioDeviceInfo audioOutput() const;
 
-//    using ContentStream = QVariantHash;
+    QList<QMediaMetaData> audioTracks() const;
+    QList<QMediaMetaData> videoTracks() const;
+    QList<QMediaMetaData> subtitleTracks() const;
 
-//    QList<ContentStream> audioStreams() const;
-//    QList<ContentStream> videoStreams() const;
-//    QList<ContentStream> subtitleStreams() const;
+    int activeAudioTrack() const;
+    int activeVideoTrack() const;
+    int activeSubtitleTrack() const;
 
-//    int audioStream() const;
-//    int videoStream() const;
-//    int subtitleStream() const;
-
-//    void setAudioStream(int index) const;
-//    void setVideoStream(int index) const;
-//    void setSubtitleStream(int index) const;
+    void setActiveAudioTrack(int index);
+    void setActiveVideoTrack(int index);
+    void setActiveSubtitleTrack(int index);
 
     void setVideoOutput(QObject *);
     void setVideoOutput(QAbstractVideoSurface *surface);
@@ -212,6 +210,9 @@ Q_SIGNALS:
 
     void metaDataChanged();
 
+    void tracksChanged();
+    void activeTracksChanged();
+
     void error(QMediaPlayer::Error error);
 
 private: