2 Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 /** @file src/film_viewer.h
23 * @brief FilmViewer class.
27 #include "video_view.h"
28 #include "lib/change_signaller.h"
29 #include "lib/config.h"
30 #include "lib/film_property.h"
31 #include "lib/player.h"
32 #include "lib/player_text.h"
33 #include "lib/signaller.h"
34 #include "lib/timer.h"
35 #include <dcp/warnings.h>
36 LIBDCP_DISABLE_WARNINGS
39 LIBDCP_ENABLE_WARNINGS
44 class ClosedCaptionsDialog;
49 class RGBPlusAlphaImage;
54 * @brief A wx widget to view a Film.
56 class FilmViewer : public Signaller
59 FilmViewer (wxWindow *);
62 /** @return the window showing the film's video */
63 wxWindow* panel () const {
64 return _video_view->get();
67 std::shared_ptr<const VideoView> video_view () const {
71 void show_closed_captions ();
73 void set_film (std::shared_ptr<Film>);
74 std::shared_ptr<Film> film () const {
78 void seek (dcpomatic::DCPTime t, bool accurate);
79 void seek (std::shared_ptr<Content> content, dcpomatic::ContentTime p, bool accurate);
80 void seek_by (dcpomatic::DCPTime by, bool accurate);
81 /** @return our `playhead' position; this may not lie exactly on a frame boundary */
82 dcpomatic::DCPTime position () const {
83 return _video_view->position();
85 boost::optional<dcpomatic::ContentTime> position_in_content (std::shared_ptr<const Content> content) const;
86 dcpomatic::DCPTime one_video_frame () const;
93 bool playing () const {
97 void set_coalesce_player_changes (bool c);
98 void set_dcp_decode_reduction (boost::optional<int> reduction);
99 boost::optional<int> dcp_decode_reduction () const;
100 void set_outline_content (bool o);
101 void set_outline_subtitles (boost::optional<dcpomatic::Rect<double>>);
102 void set_eyes (Eyes e);
103 void set_pad_black (bool p);
104 void set_optimise_for_j2k (bool o);
105 void set_crop_guess (dcpomatic::Rect<float> crop);
106 void unset_crop_guess ();
108 void slow_refresh ();
110 dcpomatic::DCPTime time () const;
111 boost::optional<dcpomatic::DCPTime> audio_time () const;
113 int dropped () const;
114 int errored () const;
117 int audio_callback (void* out, unsigned int frames);
119 StateTimer const & state_timer () const {
120 return _video_view->state_timer ();
123 /* Some accessors and utility methods that VideoView classes need */
124 bool outline_content () const {
125 return _outline_content;
127 boost::optional<dcpomatic::Rect<double>> outline_subtitles () const {
128 return _outline_subtitles;
130 bool pad_black () const {
133 std::shared_ptr<Butler> butler () const {
136 ClosedCaptionsDialog* closed_captions_dialog () const {
137 return _closed_captions_dialog;
140 void image_changed (std::shared_ptr<PlayerVideo> video);
141 boost::optional<dcpomatic::Rect<float>> crop_guess () const {
145 bool pending_idle_get () const {
149 boost::signals2::signal<void (std::shared_ptr<PlayerVideo>)> ImageChanged;
150 boost::signals2::signal<void ()> Started;
151 boost::signals2::signal<void ()> Stopped;
152 /** While playing back we reached the end of the film (emitted from GUI thread) */
153 boost::signals2::signal<void ()> Finished;
154 /** Emitted from the GUI thread when a lot of frames are being dropped */
155 boost::signals2::signal<void()> TooManyDropped;
157 boost::signals2::signal<bool ()> PlaybackPermitted;
161 void video_view_sized ();
162 void calculate_sizes ();
163 void player_change (ChangeType type, int, bool);
164 void player_change (std::vector<int> properties);
165 void idle_handler ();
166 void request_idle_display_next_frame ();
167 void film_change(ChangeType, FilmProperty);
168 void destroy_butler();
169 void create_butler();
170 void destroy_and_maybe_create_butler();
171 void config_changed (Config::Property);
172 void film_length_change ();
174 void start_audio_stream_if_open ();
176 #if (RTAUDIO_VERSION_MAJOR >= 6)
177 void rtaudio_error_callback(std::string const& error);
178 mutable boost::mutex _last_rtaudio_error_mutex;
179 std::string _last_rtaudio_error;
180 std::string last_rtaudio_error() const;
183 dcpomatic::DCPTime uncorrected_time () const;
184 Frame average_latency () const;
186 bool quick_refresh ();
188 std::shared_ptr<Film> _film;
189 boost::optional<Player> _player;
191 std::shared_ptr<VideoView> _video_view;
192 bool _coalesce_player_changes = false;
193 std::vector<int> _pending_player_changes;
196 int _audio_channels = 0;
197 unsigned int _audio_block_size = 1024;
198 bool _playing = false;
200 std::shared_ptr<Butler> _butler;
202 std::list<Frame> _latency_history;
203 /** Mutex to protect _latency_history */
204 mutable boost::mutex _latency_history_mutex;
205 int _latency_history_count = 0;
207 boost::optional<int> _dcp_decode_reduction;
209 /** true to assume that this viewer is only being used for JPEG2000 sources
210 * so it can optimise accordingly.
212 bool _optimise_for_j2k = false;
214 ClosedCaptionsDialog* _closed_captions_dialog = nullptr;
216 bool _outline_content = false;
217 boost::optional<dcpomatic::Rect<double>> _outline_subtitles;
218 /** true to pad the viewer panel with black, false to use
219 the normal window background colour.
221 bool _pad_black = false;
223 /** true if an get() is required next time we are idle */
224 bool _idle_get = false;
226 boost::optional<dcpomatic::Rect<float>> _crop_guess;
228 boost::signals2::scoped_connection _config_changed_connection;