- /* Methods to query our input video */
-
- /** @return length in video frames */
- virtual int length_in_frames () const = 0;
- /** @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;
- /** @return number of audio channels */
- virtual int audio_channels () const = 0;
- /** @return audio sampling rate in Hz */
- virtual int audio_sample_rate () const = 0;
- /** @return format of audio samples */
- virtual AVSampleFormat audio_sample_format () const = 0;
- virtual int64_t audio_channel_layout () const = 0;
- virtual bool has_subtitles () const = 0;
-
- void process_begin ();
- bool pass ();
- void process_end ();
- void go ();
-
- /** @return the index of the last video frame to be processed */
- int last_video_frame () const {
- return _video_frame;
- }
-
- virtual std::vector<AudioStream> audio_streams () const {
- return std::vector<AudioStream> ();
- }
-
- virtual std::vector<SubtitleStream> subtitle_streams () const {
- return std::vector<SubtitleStream> ();
- }
-
- /** Emitted when a video frame is ready.
- * First parameter is the frame.
- * Second parameter is its index within the content.
- * Third parameter is either 0 or a subtitle that should be on this frame.