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/*
Copyright (C) 2013-2014 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_content.h"
#include "dcpomatic_time.h"
#include "content_subtitle.h"
#include "position_image.h"
#include "piece.h"
class Job;
class Film;
class Playlist;
class AudioContent;
class Piece;
class Image;
class DCPVideo;
class Decoder;
class PlayerStatistics
{
public:
struct Video {
Video ()
: black (0)
, repeat (0)
, good (0)
, skip (0)
{}
int black;
int repeat;
int good;
int skip;
} video;
struct Audio {
Audio ()
: silence (0)
, good (0)
, skip (0)
{}
DCPTime silence;
int64_t good;
int64_t skip;
} audio;
void dump (boost::shared_ptr<Log>) const;
};
/** 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, dcp::Size, dcp::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;
dcp::Size _inter_size;
dcp::Size _out_size;
Scaler const * _scaler;
boost::shared_ptr<const Image> _subtitle_image;
Position<int> _subtitle_position;
};
/** @class Player
* @brief A class which can `play' a Playlist.
*/
class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
{
public:
Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
boost::shared_ptr<DCPVideo> get_video (DCPTime time, bool accurate);
boost::shared_ptr<AudioBuffers> get_audio (DCPTime time, DCPTime length, bool accurate);
void set_video_container_size (dcp::Size);
void set_approximate_size ();
void set_burn_subtitles (bool burn) {
_burn_subtitles = burn;
}
PlayerStatistics const & statistics () const;
/** 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 setup_pieces ();
void playlist_changed ();
void content_changed (boost::weak_ptr<Content>, int, bool);
void flush ();
void film_changed (Film::Property);
std::list<PositionImage> process_content_image_subtitles (
boost::shared_ptr<SubtitleContent>, std::list<boost::shared_ptr<ContentImageSubtitle> >
);
std::list<PositionImage> process_content_text_subtitles (std::list<boost::shared_ptr<ContentTextSubtitle> >);
void update_subtitle_from_text ();
VideoFrame dcp_to_content_video (boost::shared_ptr<const Piece> piece, DCPTime t) const;
AudioFrame dcp_to_content_audio (boost::shared_ptr<const Piece> piece, DCPTime t) const;
ContentTime dcp_to_content_subtitle (boost::shared_ptr<const Piece> piece, DCPTime t) const;
boost::shared_ptr<DCPVideo> black_dcp_video (DCPTime) const;
template<class C>
std::list<boost::shared_ptr<Piece> >
overlaps (DCPTime t)
{
std::list<boost::shared_ptr<Piece> > overlaps;
for (typename std::list<boost::shared_ptr<Piece> >::const_iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
if (boost::dynamic_pointer_cast<C> ((*i)->content) && (*i)->content->position() <= t && t < (*i)->content->end()) {
overlaps.push_back (*i);
}
}
return overlaps;
}
boost::shared_ptr<const Film> _film;
boost::shared_ptr<const Playlist> _playlist;
/** 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;
dcp::Size _video_container_size;
boost::shared_ptr<Image> _black_image;
bool _approximate_size;
bool _burn_subtitles;
PlayerStatistics _statistics;
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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