+ boost::shared_ptr<VideoDecoder> video;
+ boost::shared_ptr<AudioDecoder> audio;
+ boost::shared_ptr<SubtitleDecoder> subtitle;
+
+ enum PassReason {
+ PASS_REASON_VIDEO,
+ PASS_REASON_AUDIO,
+ PASS_REASON_SUBTITLE
+ };
+
+ void maybe_seek_video (ContentTime time, bool accurate);
+ void maybe_seek_audio (ContentTime time, bool accurate);
+ void maybe_seek_subtitle (ContentTime time, bool accurate);
+
+ /** @return true if this decoder has already returned all its data and will give no more */
+ virtual bool pass (PassReason, bool accurate) = 0;
+
+ /** Ensure that any future get() calls return data that reflect
+ * changes in our content's settings.
+ */
+ virtual void reset () {}
+
+protected:
+ boost::optional<ContentTime> _video_position;
+ boost::optional<ContentTime> _audio_position;
+ boost::optional<ContentTime> _subtitle_position;
+
+private: