#include <boost/signals2.hpp>
#include "util.h"
#include "stream.h"
+#include "video_source.h"
+#include "audio_source.h"
+#include "film.h"
+#include "options.h"
-class Job;
-class Options;
class Image;
class Log;
class DelayLine;
class TimedSubtitle;
class Subtitle;
-class Film;
class FilterGraph;
/** @class Decoder.
* @brief Parent class for decoders of content.
*
- * These classes can be instructed run through their content
- * (by calling ::go), and they emit signals when video or audio data is ready for something else
- * to process.
+ * These classes can be instructed run through their content (by
+ * calling ::go), and they emit signals when video or audio data is
+ * ready for something else to process.
*/
class Decoder
{
public:
- Decoder (boost::shared_ptr<Film>, boost::shared_ptr<const Options>, Job *, bool, bool);
- virtual ~Decoder ();
+ Decoder (boost::shared_ptr<Film>, DecodeOptions);
+ virtual ~Decoder () {}
- /* Methods to query our input video */
+ virtual bool pass () = 0;
+ virtual bool seek (double);
+ virtual bool seek_to_last ();
- /** @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;
-
- 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 ();
- bool pass ();
- void process_end ();
- void go ();
-
- /** @return the index of the last video frame to be processed */
- int video_frame_index () const {
- return _video_frame_index;
- }
-
- 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.
- */
- boost::signals2::signal<void (boost::shared_ptr<Image>, int, boost::shared_ptr<Subtitle>)> Video;
-
- /** Emitted when some audio data is ready */
- boost::signals2::signal<void (boost::shared_ptr<AudioBuffers>)> Audio;
+ boost::signals2::signal<void()> OutputChanged;
protected:
-
- /** perform a single pass at our content */
- virtual bool do_pass () = 0;
- virtual PixelFormat pixel_format () const = 0;
-
- void process_video (AVFrame *);
- void process_audio (uint8_t *, int);
- void process_subtitle (boost::shared_ptr<TimedSubtitle>);
-
- int bytes_per_audio_sample () const;
-
/** our Film */
boost::shared_ptr<Film> _film;
- /** our options */
- boost::shared_ptr<const Options> _opt;
- /** associated Job, or 0 */
- Job* _job;
-
- /** true to do the bare minimum of work; just run through the content. Useful for acquiring
- * accurate frame counts as quickly as possible. This generates no video or audio output.
- */
- bool _minimal;
-
- /** ignore_length Ignore the content's claimed length when computing progress */
- bool _ignore_length;
+ /** our decode options */
+ DecodeOptions _opt;
private:
- void emit_audio (uint8_t* data, int size);
+ virtual void film_changed (Film::Property) {}
- /** last video frame to be processed */
- int _video_frame_index;
-
- std::list<boost::shared_ptr<FilterGraph> > _filter_graphs;
-
- DelayLine* _delay_line;
- int _delay_in_bytes;
-
- /* Number of audio frames that we have pushed to the encoder
- (at the DCP sample rate).
- */
- int64_t _audio_frames_processed;
-
- boost::shared_ptr<TimedSubtitle> _timed_subtitle;
+ boost::signals2::scoped_connection _film_connection;
};
#endif