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/*
Copyright (C) 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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef DCPOMATIC_PLAYER_H
#define DCPOMATIC_PLAYER_H
#include <list>
#include <boost/shared_ptr.hpp>
#include <boost/enable_shared_from_this.hpp>
#include "playlist.h"
#include "content.h"
#include "film.h"
#include "rect.h"
#include "audio_merger.h"
#include "audio_content.h"
class Job;
class Film;
class Playlist;
class AudioContent;
class Piece;
class Image;
class Resampler;
/** @class Player
* @brief A class which can `play' a Playlist; emitting its audio and video.
*/
struct IncomingVideo
{
public:
boost::weak_ptr<Piece> weak_piece;
boost::shared_ptr<const Image> image;
Eyes eyes;
bool same;
VideoContent::Frame frame;
Time extra;
};
/** A wrapper for an Image which contains some pending operations; these may
* not be necessary if the receiver of the PlayerImage throws it away.
*/
class PlayerImage
{
public:
PlayerImage (boost::shared_ptr<const Image>, Crop, libdcp::Size, libdcp::Size, Scaler const *);
void set_subtitle (boost::shared_ptr<const Image>, Position<int>);
boost::shared_ptr<Image> image ();
private:
boost::shared_ptr<const Image> _in;
Crop _crop;
libdcp::Size _inter_size;
libdcp::Size _out_size;
Scaler const * _scaler;
boost::shared_ptr<const Image> _subtitle_image;
Position<int> _subtitle_position;
};
class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
{
public:
Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
void disable_video ();
void disable_audio ();
bool pass ();
void seek (Time, bool);
Time video_position () const {
return _video_position;
}
void set_video_container_size (libdcp::Size);
bool repeat_last_video ();
/** Emitted when a video frame is ready.
* First parameter is the video image.
* Second parameter is the eye(s) that should see this image.
* Third parameter is the colour conversion that should be used for this image.
* Fourth parameter is true if the image is the same as the last one that was emitted.
* Fifth parameter is the time.
*/
boost::signals2::signal<void (boost::shared_ptr<PlayerImage>, Eyes, ColourConversion, bool, Time)> Video;
/** Emitted when some audio data is ready */
boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, Time)> Audio;
/** Emitted when something has changed such that if we went back and emitted
* the last frame again it would look different. This is not emitted after
* a seek.
*
* The parameter is true if these signals are currently likely to be frequent.
*/
boost::signals2::signal<void (bool)> Changed;
private:
friend class PlayerWrapper;
friend class Piece;
void process_video (boost::weak_ptr<Piece>, boost::shared_ptr<const Image>, Eyes, bool, VideoContent::Frame, Time);
void process_audio (boost::weak_ptr<Piece>, boost::shared_ptr<const AudioBuffers>, AudioContent::Frame);
void process_subtitle (boost::weak_ptr<Piece>, boost::shared_ptr<Image>, dcpomatic::Rect<double>, Time, Time);
void setup_pieces ();
void playlist_changed ();
void content_changed (boost::weak_ptr<Content>, int, bool);
void do_seek (Time, bool);
void flush ();
void emit_black ();
void emit_silence (OutputAudioFrame);
boost::shared_ptr<Resampler> resampler (boost::shared_ptr<AudioContent>, bool);
void film_changed (Film::Property);
void update_subtitle ();
boost::shared_ptr<const Film> _film;
boost::shared_ptr<const Playlist> _playlist;
bool _video;
bool _audio;
/** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
bool _have_valid_pieces;
std::list<boost::shared_ptr<Piece> > _pieces;
/** The time after the last video that we emitted */
Time _video_position;
/** The time after the last audio that we emitted */
Time _audio_position;
AudioMerger<Time, AudioContent::Frame> _audio_merger;
libdcp::Size _video_container_size;
boost::shared_ptr<PlayerImage> _black_frame;
std::map<boost::shared_ptr<AudioContent>, boost::shared_ptr<Resampler> > _resamplers;
struct {
boost::weak_ptr<Piece> piece;
boost::shared_ptr<Image> image;
dcpomatic::Rect<double> rect;
Time from;
Time to;
} _in_subtitle;
struct {
boost::shared_ptr<Image> image;
Position<int> position;
Time from;
Time to;
} _out_subtitle;
#ifdef DCPOMATIC_DEBUG
boost::shared_ptr<Content> _last_video;
#endif
bool _last_emit_was_black;
IncomingVideo _last_incoming_video;
boost::signals2::scoped_connection _playlist_changed_connection;
boost::signals2::scoped_connection _playlist_content_changed_connection;
boost::signals2::scoped_connection _film_changed_connection;
};
#endif
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