VIDEO: Add getDuration() and getStartTime() functions to Track

The AdvancedVideoDecoder::getDuration() function now attempts to calculate duration based on the longest track.

1 files changed, 28 insertions, 1 deletions

diff --git a/video/video_decoder.h b/video/video_decoder.h
index ede2872c6a..87d832eeb9 100644
--- a/video/video_decoder.h
+++ b/video/video_decoder.h
@@ -423,7 +423,7 @@ protected:
 
 		/**
 		 * Seek to the given time.
-		 * @param time The time to seek to.
+		 * @param time The time to seek to, from the beginning of the video.
 		 * @return true on success, false otherwise.
 		 */
 		virtual bool seek(const Audio::Timestamp &time) { return false; }
@@ -448,6 +448,19 @@ protected:
 		 */
 		bool isPaused() const { return _paused; }
 
+		/**
+		 * Get the start time of the track (starting from the beginning of the
+		 * movie).
+		 */
+		virtual Audio::Timestamp getStartTime() const;
+
+		/**
+		 * Get the duration of the track (starting from this track's start time).
+		 *
+		 * By default, this returns 0 for unknown.
+		 */
+		virtual Audio::Timestamp getDuration() const;
+
 	protected:
 		/**
 		 * Function called by pause() for subclasses to implement.
@@ -510,6 +523,18 @@ protected:
 	};
 
 	/**
+	 * A FixedRateVideoTrack and FixedLengthVideoTrack that implements the getDuration()
+	 * function.
+	 */
+	class FixedDurationVideoTrack : public FixedRateVideoTrack, public FixedLengthVideoTrack {
+	public:
+		FixedDurationVideoTrack() {}
+		virtual ~FixedDurationVideoTrack() {}
+
+		virtual Audio::Timestamp getDuration() const;
+	};
+
+	/**
 	 * An abstract representation of an audio track.
 	 */
 	class AudioTrack : public Track {
@@ -575,6 +600,8 @@ protected:
 		bool isSeekable() const { return true; }
 		bool seek(const Audio::Timestamp &time);
 
+		Audio::Timestamp getDuration() const;
+
 	protected:
 		Audio::AudioStream *getAudioStream() const;