- Decoder (boost::shared_ptr<Film>, boost::shared_ptr<const Options>, Job *);
- virtual ~Decoder ();
-
- /* Methods to query our input video */
-
- /** @return video frames per second, or 0 if unknown */
- virtual float frames_per_second () const = 0;
- /** @return native size in pixels */
- virtual Size native_size () const = 0;
-
- virtual int time_base_numerator () const = 0;
- virtual int time_base_denominator () const = 0;
- virtual int sample_aspect_ratio_numerator () const = 0;
- virtual int sample_aspect_ratio_denominator () const = 0;
-
- void process_begin ();
- virtual bool pass () = 0;
- void process_end ();
- void go ();
-
- SourceFrame video_frame () const {
- return _video_frame;
- }
-
- virtual void set_audio_stream (boost::optional<AudioStream>);
- virtual void set_subtitle_stream (boost::optional<SubtitleStream>);
-
- boost::optional<AudioStream> audio_stream () const {
- return _audio_stream;
- }
-
- boost::optional<SubtitleStream> subtitle_stream () const {
- return _subtitle_stream;
- }
-
- std::vector<AudioStream> audio_streams () const {
- return _audio_streams;
- }
-
- std::vector<SubtitleStream> subtitle_streams () const {
- return _subtitle_streams;
- }
-
- /** Emitted when a video frame is ready.
- * First parameter is the frame within the source.
- * Second parameter is its index within the content.
- * Third parameter is either 0 or a subtitle that should be on this frame.
+ virtual ~Decoder () {}
+
+ 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
+ };
+
+ /** Seek so that the next pass() will yield the next thing
+ * (video/sound frame, subtitle etc.) at or after the requested
+ * time. Pass accurate = true to try harder to ensure that, at worst,
+ * the next thing we yield comes before `time'. This may entail
+ * seeking some way before `time' to be on the safe side.
+ * Alternatively, if seeking is 100% accurate for this decoder,
+ * it may seek to just the right spot.