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/*
Copyright (C) 2013-2018 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DCPOMATIC_PLAYER_H
#define DCPOMATIC_PLAYER_H
#include "player_caption.h"
#include "active_captions.h"
#include "content_caption.h"
#include "film.h"
#include "content.h"
#include "position_image.h"
#include "piece.h"
#include "content_video.h"
#include "content_audio.h"
#include "audio_stream.h"
#include "audio_merger.h"
#include "empty.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 Shuffler;
class PlayerProperty
{
public:
static int const VIDEO_CONTAINER_SIZE;
static int const PLAYLIST;
static int const FILM_CONTAINER;
static int const FILM_VIDEO_FRAME_RATE;
static int const DCP_DECODE_REDUCTION;
};
/** @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);
~Player ();
bool pass ();
void seek (DCPTime time, bool accurate);
std::list<boost::shared_ptr<Font> > get_subtitle_fonts ();
std::list<ReferencedReelAsset> get_reel_assets ();
dcp::Size video_container_size () const {
return _video_container_size;
}
void set_video_container_size (dcp::Size);
void set_ignore_video ();
void set_ignore_caption ();
void set_always_burn_open_captions ();
void set_fast ();
void set_play_referenced ();
void set_dcp_decode_reduction (boost::optional<int> reduction);
DCPTime content_time_to_dcp (boost::shared_ptr<Content> content, ContentTime t);
std::list<PlayerCaption> closed_captions_for_frame (DCPTime time) 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 first parameter is what changed.
* The second parameter is true if these signals are currently likely to be frequent.
*/
boost::signals2::signal<void (int, bool)> Changed;
/** Emitted when a video frame is ready. These emissions happen in the correct order. */
boost::signals2::signal<void (boost::shared_ptr<PlayerVideo>, DCPTime)> Video;
boost::signals2::signal<void (boost::shared_ptr<AudioBuffers>, DCPTime)> Audio;
/** Emitted when a caption is ready. This signal may be emitted considerably
* after the corresponding Video.
*/
boost::signals2::signal<void (PlayerCaption, CaptionType, DCPTimePeriod)> Caption;
private:
friend class PlayerWrapper;
friend class Piece;
friend struct player_time_calculation_test1;
friend struct player_time_calculation_test2;
friend struct player_time_calculation_test3;
friend struct player_subframe_test;
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_bitmap_captions (std::list<BitmapCaption>) const;
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;
DCPTime resampled_audio_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
ContentTime dcp_to_content_time (boost::shared_ptr<const Piece> piece, DCPTime t) const;
DCPTime content_time_to_dcp (boost::shared_ptr<const Piece> piece, ContentTime t) const;
boost::shared_ptr<PlayerVideo> black_player_video_frame (Eyes eyes) const;
void video (boost::weak_ptr<Piece>, ContentVideo);
void audio (boost::weak_ptr<Piece>, AudioStreamPtr, ContentAudio);
void bitmap_text_start (boost::weak_ptr<Piece>, boost::weak_ptr<const CaptionContent>, ContentBitmapCaption);
void plain_text_start (boost::weak_ptr<Piece>, boost::weak_ptr<const CaptionContent>, ContentTextCaption);
void subtitle_stop (boost::weak_ptr<Piece>, boost::weak_ptr<const CaptionContent>, ContentTime, CaptionType);
DCPTime one_video_frame () const;
void fill_audio (DCPTimePeriod period);
std::pair<boost::shared_ptr<AudioBuffers>, DCPTime> discard_audio (
boost::shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to
) const;
boost::optional<PositionImage> open_captions_for_frame (DCPTime time) const;
void emit_video (boost::shared_ptr<PlayerVideo> pv, DCPTime time);
void do_emit_video (boost::shared_ptr<PlayerVideo> pv, DCPTime time);
void emit_audio (boost::shared_ptr<AudioBuffers> data, DCPTime time);
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 captions; i.e. never produce any */
bool _ignore_caption;
bool _always_burn_open_captions;
/** 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;
/** Time just after the last video frame we emitted, or the time of the last accurate seek */
boost::optional<DCPTime> _last_video_time;
boost::optional<Eyes> _last_video_eyes;
/** Time just after the last audio frame we emitted, or the time of the last accurate seek */
boost::optional<DCPTime> _last_audio_time;
boost::optional<int> _dcp_decode_reduction;
typedef std::map<boost::weak_ptr<Piece>, boost::shared_ptr<PlayerVideo> > LastVideoMap;
LastVideoMap _last_video;
AudioMerger _audio_merger;
Shuffler* _shuffler;
std::list<std::pair<boost::shared_ptr<PlayerVideo>, DCPTime> > _delay;
class StreamState
{
public:
StreamState () {}
StreamState (boost::shared_ptr<Piece> p, DCPTime l)
: piece(p)
, last_push_end(l)
{}
boost::shared_ptr<Piece> piece;
DCPTime last_push_end;
};
std::map<AudioStreamPtr, StreamState> _stream_states;
Empty _black;
Empty _silent;
ActiveCaptions _active_captions[CAPTION_COUNT];
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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