/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2013 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
* @brief Parent class for decoders of content.
*/
-#ifndef DVDOMATIC_DECODER_H
-#define DVDOMATIC_DECODER_H
+#ifndef DCPOMATIC_DECODER_H
+#define DCPOMATIC_DECODER_H
-#include <vector>
-#include <string>
-#include <stdint.h>
#include <boost/shared_ptr.hpp>
-#include <sigc++/sigc++.h>
-#include "util.h"
-#include "stream.h"
+#include <boost/weak_ptr.hpp>
+#include <boost/utility.hpp>
-class Job;
-class FilmState;
-class Options;
-class Image;
-class Log;
-class DelayLine;
-class TimedSubtitle;
-class Subtitle;
+class Film;
/** @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.
*/
-class Decoder
+class Decoder : public boost::noncopyable
{
public:
- Decoder (boost::shared_ptr<const FilmState>, boost::shared_ptr<const Options>, Job *, Log *, bool, bool);
- virtual ~Decoder ();
+ Decoder (boost::shared_ptr<const Film>);
+ virtual ~Decoder () {}
- /* 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<Stream> audio_streams () const {
- return std::vector<Stream> ();
- }
-
- virtual std::vector<Stream> subtitle_streams () const {
- return std::vector<Stream> ();
- }
-
- virtual void set_audio_stream (Stream s) {}
- virtual void set_subtitle_stream (Stream s) {}
-
- /** 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.
+ /** Perform one decode pass of the content, which may or may not
+ * cause the object to emit some data.
*/
- sigc::signal<void, boost::shared_ptr<Image>, int, boost::shared_ptr<Subtitle> > Video;
+ virtual void pass () = 0;
+ virtual bool done () const = 0;
- /** Emitted when some audio data is ready.
- * First parameter is an array of pointers to deinterleaved, floating point sample data for each channel.
- * Second parameter is the size of the data in frames (ie samples on each channel).
- */
- sigc::signal<void, float**, int> Audio;
-
protected:
- /** perform a single pass at our content */
- virtual bool do_pass () = 0;
- virtual PixelFormat pixel_format () 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_video (AVFrame *);
- void process_audio (uint8_t *, int);
- void process_subtitle (boost::shared_ptr<TimedSubtitle>);
-
- /** our FilmState */
- boost::shared_ptr<const FilmState> _fs;
- /** our options */
- boost::shared_ptr<const Options> _opt;
- /** associated Job, or 0 */
- Job* _job;
- /** log that we can write to */
- Log* _log;
-
- /** 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;
-private:
- void setup_video_filters ();
- void emit_audio (uint8_t* data, int size);
- int bytes_per_audio_sample () const;
+ virtual void flush () {};
- /** last video frame to be processed */
- int _video_frame;
-
- AVFilterContext* _buffer_src_context;
- AVFilterContext* _buffer_sink_context;
-
- bool _have_setup_video_filters;
- 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;
+ /** The Film that we are decoding in */
+ boost::weak_ptr<const Film> _film;
};
#endif