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/*
Copyright (C) 2012-2021 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/>.
*/
/** @file src/film_viewer.h
* @brief FilmViewer class.
*/
#include "optimisation.h"
#include "video_view.h"
#include "lib/change_signaller.h"
#include "lib/config.h"
#include "lib/film_property.h"
#include "lib/player.h"
#include "lib/player_text.h"
#include "lib/signaller.h"
#include "lib/timer.h"
#include <dcp/warnings.h>
LIBDCP_DISABLE_WARNINGS
#include <RtAudio.h>
#include <wx/wx.h>
LIBDCP_ENABLE_WARNINGS
#include <vector>
class Butler;
class ClosedCaptionsDialog;
class DCPContent;
class FFmpegPlayer;
class Image;
class Player;
class PlayerVideo;
class RGBPlusAlphaImage;
class wxToggleButton;
/** @class FilmViewer
* @brief A wx widget to view a Film.
*/
class FilmViewer : public Signaller
{
public:
FilmViewer(wxWindow* parent, bool wake);
~FilmViewer();
/** @return the window showing the film's video */
wxWindow* panel() const {
return _video_view->get();
}
std::shared_ptr<const VideoView> video_view() const {
return _video_view;
}
void show_closed_captions();
void set_film(std::shared_ptr<Film>);
std::shared_ptr<Film> film() const {
return _film;
}
/** @return The DCP that we are playing back, if that's the only content in
* our Film.
*/
std::shared_ptr<DCPContent> dcp() const;
void seek(dcpomatic::DCPTime t, bool accurate);
void seek(std::shared_ptr<Content> content, dcpomatic::ContentTime p, bool accurate);
void seek_by(dcpomatic::DCPTime by, bool accurate);
/** @return our `playhead' position; this may not lie exactly on a frame boundary */
dcpomatic::DCPTime position() const {
return _video_view->position();
}
boost::optional<dcpomatic::ContentTime> position_in_content(std::shared_ptr<const Content> content) const;
dcpomatic::DCPTime one_video_frame() const;
void start();
bool stop();
void suspend();
void resume();
bool playing() const {
return _playing;
}
void set_coalesce_player_changes(bool c);
void set_dcp_decode_reduction(boost::optional<int> reduction);
boost::optional<int> dcp_decode_reduction() const;
void set_outline_content(bool o);
void set_outline_subtitles(boost::optional<dcpomatic::Rect<double>>);
void set_eyes(Eyes e);
void set_pad_black(bool p);
void set_optimisation(Optimisation o);
void set_crop_guess(dcpomatic::Rect<float> crop);
void unset_crop_guess();
void slow_refresh();
dcpomatic::DCPTime time() const;
boost::optional<dcpomatic::DCPTime> audio_time() const;
int dropped() const;
int errored() const;
int gets() const;
int audio_callback(void* out, unsigned int frames);
StateTimer const & state_timer() const {
return _video_view->state_timer();
}
/* Some accessors and utility methods that VideoView classes need */
bool outline_content() const {
return _outline_content;
}
boost::optional<dcpomatic::Rect<double>> outline_subtitles() const {
return _outline_subtitles;
}
bool pad_black() const {
return _pad_black;
}
std::shared_ptr<Butler> butler() const {
return _butler;
}
ClosedCaptionsDialog* closed_captions_dialog() const {
return _closed_captions_dialog;
}
void finished();
void image_changed(std::shared_ptr<PlayerVideo> video);
boost::optional<dcpomatic::Rect<float>> crop_guess() const {
return _crop_guess;
}
bool pending_idle_get() const {
return _idle_get;
}
Frame average_latency() const;
/** The image we are viewing changed: call last_image() to get the image */
boost::signals2::signal<void ()> ImageChanged;
std::shared_ptr<const PlayerVideo> last_image() const;
boost::signals2::signal<void ()> Started;
boost::signals2::signal<void ()> Stopped;
/** While playing back we reached the end of the film (emitted from GUI thread) */
boost::signals2::signal<void ()> Finished;
/** Emitted from the GUI thread when a lot of frames are being dropped */
boost::signals2::signal<void()> TooManyDropped;
boost::signals2::signal<bool ()> PlaybackPermitted;
private:
void video_view_sized();
void calculate_sizes();
void player_change(ChangeType type, int, bool);
void player_change(std::vector<int> properties);
void idle_handler();
void request_idle_display_next_frame();
void film_change(ChangeType, FilmProperty);
void destroy_butler();
void create_butler();
void destroy_and_maybe_create_butler();
void config_changed(Config::Property);
void film_length_change();
void ui_finished();
void start_audio_stream_if_open();
dcpomatic::DCPTime uncorrected_time() const;
bool quick_refresh();
std::shared_ptr<Film> _film;
boost::optional<Player> _player;
std::shared_ptr<VideoView> _video_view;
bool _coalesce_player_changes = false;
std::vector<int> _pending_player_changes;
int _audio_channels = 0;
unsigned int _audio_block_size = 1024;
bool _playing = false;
int _suspended = 0;
std::shared_ptr<Butler> _butler;
std::list<Frame> _latency_history;
/** Mutex to protect _latency_history */
mutable boost::mutex _latency_history_mutex;
int _latency_history_count = 0;
boost::optional<int> _dcp_decode_reduction;
Optimisation _optimisation = Optimisation::NONE;
ClosedCaptionsDialog* _closed_captions_dialog = nullptr;
bool _outline_content = false;
boost::optional<dcpomatic::Rect<double>> _outline_subtitles;
/** true to pad the viewer panel with black, false to use
the normal window background colour.
*/
bool _pad_black = false;
/** true if an get() is required next time we are idle */
bool _idle_get = false;
boost::optional<dcpomatic::Rect<float>> _crop_guess;
/** Keep track of the image that we were talking about with the last
* emission of ImageChanged.
*/
std::shared_ptr<const PlayerVideo> _last_image;
boost::signals2::scoped_connection _config_changed_connection;
};
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