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.cc
23 * @brief A wx widget to view a preview of a Film.
27 #include "closed_captions_dialog.h"
28 #include "film_viewer.h"
29 #include "gl_video_view.h"
30 #include "nag_dialog.h"
31 #include "playhead_to_frame_dialog.h"
32 #include "playhead_to_timecode_dialog.h"
33 #include "simple_video_view.h"
35 #include "lib/butler.h"
36 #include "lib/compose.hpp"
37 #include "lib/config.h"
38 #include "lib/dcpomatic_log.h"
39 #include "lib/examine_content_job.h"
40 #include "lib/exceptions.h"
42 #include "lib/filter.h"
43 #include "lib/image.h"
44 #include "lib/job_manager.h"
46 #include "lib/player.h"
47 #include "lib/player_video.h"
48 #include "lib/ratio.h"
49 #include "lib/text_content.h"
50 #include "lib/timer.h"
52 #include "lib/video_content.h"
53 #include "lib/video_decoder.h"
55 #include <libavutil/pixfmt.h>
57 #include <dcp/exceptions.h>
58 #include <wx/tglbtn.h>
63 using std::dynamic_pointer_cast;
64 using std::make_shared;
66 using std::shared_ptr;
69 using boost::optional;
70 #if BOOST_VERSION >= 106100
71 using namespace boost::placeholders;
74 using namespace dcpomatic;
79 rtaudio_callback (void* out, void *, unsigned int frames, double, RtAudioStreamStatus, void* data)
81 return reinterpret_cast<FilmViewer*>(data)->audio_callback (out, frames);
85 FilmViewer::FilmViewer (wxWindow* p)
86 : _audio (DCPOMATIC_RTAUDIO_API)
87 , _closed_captions_dialog (new ClosedCaptionsDialog(p, this))
89 #if wxCHECK_VERSION(3, 1, 0)
90 switch (Config::instance()->video_view_type()) {
91 case Config::VIDEO_VIEW_OPENGL:
92 _video_view = std::make_shared<GLVideoView>(this, p);
94 case Config::VIDEO_VIEW_SIMPLE:
95 _video_view = std::make_shared<SimpleVideoView>(this, p);
99 _video_view = std::make_shared<SimpleVideoView>(this, p);
102 _video_view->Sized.connect (boost::bind(&FilmViewer::video_view_sized, this));
103 _video_view->TooManyDropped.connect (boost::bind(boost::ref(TooManyDropped)));
105 set_film (shared_ptr<Film>());
107 _config_changed_connection = Config::instance()->Changed.connect(bind(&FilmViewer::config_changed, this, _1));
108 config_changed (Config::SOUND_OUTPUT);
112 FilmViewer::~FilmViewer ()
118 /** Ask for ::get() to be called next time we are idle */
120 FilmViewer::request_idle_display_next_frame ()
127 DCPOMATIC_ASSERT (signal_manager);
128 signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
133 FilmViewer::idle_handler ()
139 if (_video_view->display_next_frame(true) == VideoView::AGAIN) {
140 /* get() could not complete quickly so we'll try again later */
141 signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
149 FilmViewer::set_film (shared_ptr<Film> film)
157 _video_view->clear ();
158 _closed_captions_dialog->clear ();
163 _video_view->update ();
168 _player = make_shared<Player>(_film, _optimise_for_j2k ? Image::Alignment::COMPACT : Image::Alignment::PADDED);
169 _player->set_fast ();
170 if (_dcp_decode_reduction) {
171 _player->set_dcp_decode_reduction (_dcp_decode_reduction);
173 } catch (bad_alloc &) {
174 error_dialog (_video_view->get(), _("There is not enough free memory to do that."));
179 _player->set_always_burn_open_subtitles ();
180 _player->set_play_referenced ();
182 _film->Change.connect (boost::bind (&FilmViewer::film_change, this, _1, _2));
183 _film->LengthChange.connect (boost::bind(&FilmViewer::film_length_change, this));
184 _player->Change.connect (boost::bind (&FilmViewer::player_change, this, _1, _2, _3));
186 film_change (ChangeType::DONE, Film::Property::VIDEO_FRAME_RATE);
187 film_change (ChangeType::DONE, Film::Property::THREE_D);
188 film_length_change ();
190 /* Keep about 1 second's worth of history samples */
191 _latency_history_count = _film->audio_frame_rate() / _audio_block_size;
193 _closed_captions_dialog->update_tracks (_film);
203 FilmViewer::recreate_butler ()
213 #if wxCHECK_VERSION(3, 1, 0)
214 auto const j2k_gl_optimised = dynamic_pointer_cast<GLVideoView>(_video_view) && _optimise_for_j2k;
216 auto const j2k_gl_optimised = false;
219 _butler = std::make_shared<Butler>(
222 Config::instance()->audio_mapping(_audio_channels),
224 boost::bind(&PlayerVideo::force, AV_PIX_FMT_RGB24),
226 j2k_gl_optimised ? Image::Alignment::COMPACT : Image::Alignment::PADDED,
231 if (!Config::instance()->sound() && !_audio.isStreamOpen()) {
232 _butler->disable_audio ();
235 _closed_captions_dialog->set_butler (_butler);
242 FilmViewer::set_outline_content (bool o)
244 _outline_content = o;
245 _video_view->update ();
250 FilmViewer::set_outline_subtitles (optional<dcpomatic::Rect<double>> rect)
252 _outline_subtitles = rect;
253 _video_view->update ();
258 FilmViewer::set_eyes (Eyes e)
260 _video_view->set_eyes (e);
266 FilmViewer::video_view_sized ()
269 if (!quick_refresh()) {
276 FilmViewer::calculate_sizes ()
278 if (!_film || !_player) {
282 auto const container = _film->container ();
284 auto const scale = dpi_scale_factor (_video_view->get());
285 int const video_view_width = std::round(_video_view->get()->GetSize().x * scale);
286 int const video_view_height = std::round(_video_view->get()->GetSize().y * scale);
288 auto const view_ratio = float(video_view_width) / video_view_height;
289 auto const film_ratio = container ? container->ratio () : 1.78;
292 if (view_ratio < film_ratio) {
293 /* panel is less widscreen than the film; clamp width */
294 out_size.width = video_view_width;
295 out_size.height = lrintf (out_size.width / film_ratio);
297 /* panel is more widescreen than the film; clamp height */
298 out_size.height = video_view_height;
299 out_size.width = lrintf (out_size.height * film_ratio);
302 /* Catch silly values */
303 out_size.width = max (64, out_size.width);
304 out_size.height = max (64, out_size.height);
306 _player->set_video_container_size (out_size);
311 FilmViewer::suspend ()
314 if (_audio.isStreamRunning()) {
315 _audio.abortStream();
321 FilmViewer::start_audio_stream_if_open ()
323 if (_audio.isStreamOpen()) {
324 _audio.setStreamTime (_video_view->position().seconds());
326 _audio.startStream ();
327 } catch (RtAudioError& e) {
331 _("There was a problem starting audio playback. Please try another audio output device in Preferences."), std_to_wx(e.what())
339 FilmViewer::resume ()
341 DCPOMATIC_ASSERT (_suspended > 0);
343 if (_playing && !_suspended) {
344 start_audio_stream_if_open ();
345 _video_view->start ();
357 auto v = PlaybackPermitted ();
359 /* Computer says no */
363 /* We are about to set up the audio stream from the position of the video view.
364 If there is `lazy' seek in progress we need to wait for it to go through so that
365 _video_view->position() gives us a sensible answer.
371 /* Take the video view's idea of position as our `playhead' and start the
372 audio stream (which is the timing reference) there.
374 start_audio_stream_if_open ();
377 /* Calling start() below may directly result in Stopped being emitted, and if that
378 * happens we want it to come after the Started signal, so do that first.
381 _video_view->start ();
388 if (_audio.isStreamRunning()) {
389 /* stop stream and discard any remaining queued samples */
390 _audio.abortStream ();
398 _video_view->stop ();
401 _video_view->rethrow ();
407 FilmViewer::player_change (ChangeType type, int property, bool frequent)
409 if (type != ChangeType::DONE || frequent) {
413 if (_coalesce_player_changes) {
414 _pending_player_changes.push_back (property);
418 player_change ({property});
423 FilmViewer::player_change (vector<int> properties)
427 bool try_quick_refresh = false;
428 bool update_ccap_tracks = false;
430 for (auto i: properties) {
432 i == VideoContentProperty::CROP ||
433 i == VideoContentProperty::CUSTOM_RATIO ||
434 i == VideoContentProperty::CUSTOM_SIZE ||
435 i == VideoContentProperty::FADE_IN ||
436 i == VideoContentProperty::FADE_OUT ||
437 i == VideoContentProperty::COLOUR_CONVERSION ||
438 i == PlayerProperty::VIDEO_CONTAINER_SIZE ||
439 i == PlayerProperty::FILM_CONTAINER
441 try_quick_refresh = true;
444 if (i == TextContentProperty::USE || i == TextContentProperty::TYPE || i == TextContentProperty::DCP_TRACK) {
445 update_ccap_tracks = true;
449 if (!try_quick_refresh || !quick_refresh()) {
453 if (update_ccap_tracks) {
454 _closed_captions_dialog->update_tracks (_film);
460 FilmViewer::film_change (ChangeType type, Film::Property p)
462 if (type != ChangeType::DONE) {
466 if (p == Film::Property::AUDIO_CHANNELS) {
468 } else if (p == Film::Property::VIDEO_FRAME_RATE) {
469 _video_view->set_video_frame_rate (_film->video_frame_rate());
470 } else if (p == Film::Property::THREE_D) {
471 _video_view->set_three_d (_film->three_d());
472 } else if (p == Film::Property::CONTENT) {
473 _closed_captions_dialog->update_tracks (_film);
479 FilmViewer::film_length_change ()
481 _video_view->set_length (_film->length());
485 /** Re-get the current frame slowly by seeking */
487 FilmViewer::slow_refresh ()
489 seek (_video_view->position(), true);
493 /** Try to re-get the current frame quickly by resetting the metadata
494 * in the PlayerVideo that we used last time.
495 * @return true if this was possible, false if not.
498 FilmViewer::quick_refresh ()
500 if (!_video_view || !_film || !_player) {
503 return _video_view->reset_metadata (_film, _player->video_container_size());
508 FilmViewer::seek (shared_ptr<Content> content, ContentTime t, bool accurate)
510 auto dt = _player->content_time_to_dcp (content, t);
512 seek (*dt, accurate);
518 FilmViewer::set_coalesce_player_changes (bool c)
520 _coalesce_player_changes = c;
523 player_change (_pending_player_changes);
524 _pending_player_changes.clear ();
530 FilmViewer::seek (DCPTime t, bool accurate)
540 if (t >= _film->length()) {
541 t = _film->length() - one_video_frame();
546 _closed_captions_dialog->clear ();
547 _butler->seek (t, accurate);
550 /* We're not playing, so let the GUI thread get on and
551 come back later to get the next frame after the seek.
553 request_idle_display_next_frame ();
555 /* We're going to start playing again straight away
556 so wait for the seek to finish.
558 while (_video_view->display_next_frame(false) == VideoView::AGAIN) {}
566 FilmViewer::config_changed (Config::Property p)
568 if (p == Config::AUDIO_MAPPING) {
573 if (p != Config::SOUND && p != Config::SOUND_OUTPUT) {
577 if (_audio.isStreamOpen ()) {
578 _audio.closeStream ();
581 if (Config::instance()->sound() && _audio.getDeviceCount() > 0) {
583 if (Config::instance()->sound_output()) {
584 while (st < _audio.getDeviceCount()) {
586 if (_audio.getDeviceInfo(st).name == Config::instance()->sound_output().get()) {
589 } catch (RtAudioError&) {
590 /* Something went wrong with that device so we don't want to use it anyway */
594 if (st == _audio.getDeviceCount()) {
595 st = _audio.getDefaultOutputDevice();
598 st = _audio.getDefaultOutputDevice();
602 _audio_channels = _audio.getDeviceInfo(st).outputChannels;
603 RtAudio::StreamParameters sp;
605 sp.nChannels = _audio_channels;
607 _audio.openStream (&sp, 0, RTAUDIO_FLOAT32, 48000, &_audio_block_size, &rtaudio_callback, this);
608 } catch (RtAudioError& e) {
612 _("Could not set up audio output. There will be no audio during the preview."), std_to_wx(e.what())
625 FilmViewer::uncorrected_time () const
627 if (_audio.isStreamRunning()) {
628 return DCPTime::from_seconds (const_cast<RtAudio*>(&_audio)->getStreamTime());
631 return _video_view->position();
636 FilmViewer::audio_time () const
638 if (!_audio.isStreamRunning()) {
642 return DCPTime::from_seconds (const_cast<RtAudio*>(&_audio)->getStreamTime ()) -
643 DCPTime::from_frames (average_latency(), _film->audio_frame_rate());
648 FilmViewer::time () const
650 return audio_time().get_value_or(_video_view->position());
655 FilmViewer::audio_callback (void* out_p, unsigned int frames)
658 auto t = _butler->get_audio (Butler::Behaviour::NON_BLOCKING, reinterpret_cast<float*> (out_p), frames);
659 if (!t || DCPTime(uncorrected_time() - *t) < one_video_frame()) {
660 /* There was an underrun or this audio is on time; carry on */
663 /* The audio we just got was (very) late; drop it and get some more. */
666 boost::mutex::scoped_lock lm (_latency_history_mutex, boost::try_to_lock);
668 _latency_history.push_back (_audio.getStreamLatency ());
669 if (_latency_history.size() > static_cast<size_t> (_latency_history_count)) {
670 _latency_history.pop_front ();
679 FilmViewer::average_latency () const
681 boost::mutex::scoped_lock lm (_latency_history_mutex);
682 if (_latency_history.empty()) {
687 for (auto i: _latency_history) {
691 return total / _latency_history.size();
696 FilmViewer::set_dcp_decode_reduction (optional<int> reduction)
698 _dcp_decode_reduction = reduction;
700 _player->set_dcp_decode_reduction (reduction);
706 FilmViewer::dcp_decode_reduction () const
708 return _dcp_decode_reduction;
713 FilmViewer::one_video_frame () const
715 return DCPTime::from_frames (1, _film ? _film->video_frame_rate() : 24);
719 /** Open a dialog box showing our film's closed captions */
721 FilmViewer::show_closed_captions ()
723 _closed_captions_dialog->Show();
728 FilmViewer::seek_by (DCPTime by, bool accurate)
730 seek (_video_view->position() + by, accurate);
735 FilmViewer::set_pad_black (bool p)
741 /** Called when a player has finished the current film.
742 * May be called from a non-UI thread.
745 FilmViewer::finished ()
747 emit (boost::bind(&FilmViewer::ui_finished, this));
751 /** Called by finished() in the UI thread */
753 FilmViewer::ui_finished ()
761 FilmViewer::dropped () const
763 return _video_view->dropped ();
768 FilmViewer::errored () const
770 return _video_view->errored ();
775 FilmViewer::gets () const
777 return _video_view->gets ();
782 FilmViewer::image_changed (shared_ptr<PlayerVideo> pv)
784 emit (boost::bind(boost::ref(ImageChanged), pv));
789 FilmViewer::set_optimise_for_j2k (bool o)
791 _optimise_for_j2k = o;
792 _video_view->set_optimise_for_j2k (o);