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/*
Copyright (C) 2013-2015 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 "player_subtitles.h"
#include "film.h"
#include "content.h"
#include "position_image.h"
#include "piece.h"
#include <boost/shared_ptr.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <list>
namespace dcp {
class ReelAsset;
}
class PlayerVideo;
class Playlist;
class Font;
class AudioBuffers;
class ReferencedReelAsset;
/** @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> playlist);
std::list<boost::shared_ptr<PlayerVideo> > get_video (DCPTime time, bool accurate);
boost::shared_ptr<AudioBuffers> get_audio (DCPTime time, DCPTime length, bool accurate);
PlayerSubtitles get_subtitles (DCPTime time, DCPTime length, bool starting, bool burnt, bool accurate);
std::list<boost::shared_ptr<Font> > get_subtitle_fonts ();
std::list<ReferencedReelAsset> get_reel_assets ();
void set_video_container_size (dcp::Size);
void set_ignore_video ();
void set_ignore_audio ();
void set_enable_subtitles (bool enable);
void set_always_burn_subtitles (bool burn);
void set_fast ();
void set_play_referenced ();
/** 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;
friend struct player_overlaps_test;
friend struct player_time_calculation_test1;
friend struct player_time_calculation_test2;
friend struct player_time_calculation_test3;
void setup_pieces ();
void flush ();
void film_changed (Film::Property);
void playlist_changed ();
void playlist_content_changed (boost::weak_ptr<Content>, int, bool);
std::list<PositionImage> transform_image_subtitles (std::list<ImageSubtitle>) const;
void update_subtitle_from_text ();
Frame dcp_to_content_video (boost::shared_ptr<const Piece> piece, DCPTime t) const;
DCPTime content_video_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
Frame dcp_to_resampled_audio (boost::shared_ptr<const Piece> piece, DCPTime t) const;
ContentTime dcp_to_content_subtitle (boost::shared_ptr<const Piece> piece, DCPTime t) const;
DCPTime content_subtitle_to_dcp (boost::shared_ptr<const Piece> piece, ContentTime t) const;
boost::shared_ptr<PlayerVideo> black_player_video_frame (DCPTime) const;
/** @return Pieces of content type C that overlap a specified time range in the DCP */
template<class C>
std::list<boost::shared_ptr<Piece> >
overlaps (DCPTime from, DCPTime to)
{
if (!_have_valid_pieces) {
setup_pieces ();
}
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)) {
continue;
}
if ((*i)->content->position() < to && (*i)->content->end() > from) {
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;
/** Size of the image in the DCP (e.g. 1990x1080 for flat) */
dcp::Size _video_container_size;
boost::shared_ptr<Image> _black_image;
/** true if the player should ignore all video; i.e. never produce any */
bool _ignore_video;
/** true if the player should ignore all audio; i.e. never produce any */
bool _ignore_audio;
/** true if the player should always burn subtitles into the video regardless
of content settings
*/
bool _always_burn_subtitles;
/** true if we should try to be fast rather than high quality */
bool _fast;
/** true if we should `play' (i.e output) referenced DCP data (e.g. for preview) */
bool _play_referenced;
boost::shared_ptr<AudioProcessor> _audio_processor;
boost::signals2::scoped_connection _film_changed_connection;
boost::signals2::scoped_connection _playlist_changed_connection;
boost::signals2::scoped_connection _playlist_content_changed_connection;
};
#endif
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