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"
54 #include <dcp/exceptions.h>
55 #include <dcp/warnings.h>
57 #include <libavutil/pixfmt.h>
59 LIBDCP_DISABLE_WARNINGS
60 #include <wx/tglbtn.h>
61 LIBDCP_ENABLE_WARNINGS
66 using std::dynamic_pointer_cast;
67 using std::make_shared;
69 using std::shared_ptr;
72 using boost::optional;
73 #if BOOST_VERSION >= 106100
74 using namespace boost::placeholders;
77 using namespace dcpomatic;
82 rtaudio_callback (void* out, void *, unsigned int frames, double, RtAudioStreamStatus, void* data)
84 return reinterpret_cast<FilmViewer*>(data)->audio_callback (out, frames);
88 FilmViewer::FilmViewer (wxWindow* p)
89 : _audio (DCPOMATIC_RTAUDIO_API)
90 , _closed_captions_dialog (new ClosedCaptionsDialog(p, this))
92 #if wxCHECK_VERSION(3, 1, 0)
93 switch (Config::instance()->video_view_type()) {
94 case Config::VIDEO_VIEW_OPENGL:
95 _video_view = std::make_shared<GLVideoView>(this, p);
97 case Config::VIDEO_VIEW_SIMPLE:
98 _video_view = std::make_shared<SimpleVideoView>(this, p);
102 _video_view = std::make_shared<SimpleVideoView>(this, p);
105 _video_view->Sized.connect (boost::bind(&FilmViewer::video_view_sized, this));
106 _video_view->TooManyDropped.connect (boost::bind(boost::ref(TooManyDropped)));
108 set_film (shared_ptr<Film>());
110 _config_changed_connection = Config::instance()->Changed.connect(bind(&FilmViewer::config_changed, this, _1));
111 config_changed (Config::SOUND_OUTPUT);
115 FilmViewer::~FilmViewer ()
121 /** Ask for ::idle_handler() to be called next time we are idle */
123 FilmViewer::request_idle_display_next_frame ()
130 DCPOMATIC_ASSERT (signal_manager);
131 signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
136 FilmViewer::idle_handler ()
142 if (_video_view->display_next_frame(true) == VideoView::AGAIN) {
143 /* get() could not complete quickly so we'll try again later */
144 signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
152 FilmViewer::set_film (shared_ptr<Film> film)
160 _video_view->clear ();
161 _closed_captions_dialog->clear ();
166 _video_view->update ();
171 _player = make_shared<Player>(_film, _optimise_for_j2k ? Image::Alignment::COMPACT : Image::Alignment::PADDED);
172 _player->set_fast ();
173 if (_dcp_decode_reduction) {
174 _player->set_dcp_decode_reduction (_dcp_decode_reduction);
176 } catch (bad_alloc &) {
177 error_dialog (_video_view->get(), _("There is not enough free memory to do that."));
182 _player->set_always_burn_open_subtitles ();
183 _player->set_play_referenced ();
185 _film->Change.connect (boost::bind (&FilmViewer::film_change, this, _1, _2));
186 _film->LengthChange.connect (boost::bind(&FilmViewer::film_length_change, this));
187 _player->Change.connect (boost::bind (&FilmViewer::player_change, this, _1, _2, _3));
189 film_change (ChangeType::DONE, Film::Property::VIDEO_FRAME_RATE);
190 film_change (ChangeType::DONE, Film::Property::THREE_D);
191 film_length_change ();
193 /* Keep about 1 second's worth of history samples */
194 _latency_history_count = _film->audio_frame_rate() / _audio_block_size;
196 _closed_captions_dialog->update_tracks (_film);
206 FilmViewer::recreate_butler ()
216 #if wxCHECK_VERSION(3, 1, 0)
217 auto const j2k_gl_optimised = dynamic_pointer_cast<GLVideoView>(_video_view) && _optimise_for_j2k;
219 auto const j2k_gl_optimised = false;
222 _butler = std::make_shared<Butler>(
225 Config::instance()->audio_mapping(_audio_channels),
227 boost::bind(&PlayerVideo::force, AV_PIX_FMT_RGB24),
229 j2k_gl_optimised ? Image::Alignment::COMPACT : Image::Alignment::PADDED,
232 (Config::instance()->sound() && _audio.isStreamOpen()) ? Butler::Audio::ENABLED : Butler::Audio::DISABLED
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 /* Make sure the video container sizes are always a multiple of 2 so that
307 * we don't get gaps with subsampled sources (e.g. YUV420)
309 if (out_size.width % 2) {
312 if (out_size.height % 2) {
316 _player->set_video_container_size (out_size);
321 FilmViewer::suspend ()
324 if (_audio.isStreamRunning()) {
325 _audio.abortStream();
331 FilmViewer::start_audio_stream_if_open ()
333 if (_audio.isStreamOpen()) {
334 _audio.setStreamTime (_video_view->position().seconds());
336 _audio.startStream ();
337 } catch (RtAudioError& e) {
341 _("There was a problem starting audio playback. Please try another audio output device in Preferences."), std_to_wx(e.what())
349 FilmViewer::resume ()
351 DCPOMATIC_ASSERT (_suspended > 0);
353 if (_playing && !_suspended) {
354 start_audio_stream_if_open ();
355 _video_view->start ();
367 auto v = PlaybackPermitted ();
369 /* Computer says no */
373 /* We are about to set up the audio stream from the position of the video view.
374 If there is `lazy' seek in progress we need to wait for it to go through so that
375 _video_view->position() gives us a sensible answer.
381 /* Take the video view's idea of position as our `playhead' and start the
382 audio stream (which is the timing reference) there.
384 start_audio_stream_if_open ();
387 /* Calling start() below may directly result in Stopped being emitted, and if that
388 * happens we want it to come after the Started signal, so do that first.
391 _video_view->start ();
398 if (_audio.isStreamRunning()) {
399 /* stop stream and discard any remaining queued samples */
400 _audio.abortStream ();
408 _video_view->stop ();
411 _video_view->rethrow ();
417 FilmViewer::player_change (ChangeType type, int property, bool frequent)
419 if (type != ChangeType::DONE || frequent) {
423 if (_coalesce_player_changes) {
424 _pending_player_changes.push_back (property);
428 player_change ({property});
433 FilmViewer::player_change (vector<int> properties)
437 bool try_quick_refresh = false;
438 bool update_ccap_tracks = false;
440 for (auto i: properties) {
442 i == VideoContentProperty::CROP ||
443 i == VideoContentProperty::CUSTOM_RATIO ||
444 i == VideoContentProperty::CUSTOM_SIZE ||
445 i == VideoContentProperty::FADE_IN ||
446 i == VideoContentProperty::FADE_OUT ||
447 i == VideoContentProperty::COLOUR_CONVERSION ||
448 i == PlayerProperty::VIDEO_CONTAINER_SIZE ||
449 i == PlayerProperty::FILM_CONTAINER
451 try_quick_refresh = true;
454 if (i == TextContentProperty::USE || i == TextContentProperty::TYPE || i == TextContentProperty::DCP_TRACK) {
455 update_ccap_tracks = true;
459 if (!try_quick_refresh || !quick_refresh()) {
463 if (update_ccap_tracks) {
464 _closed_captions_dialog->update_tracks (_film);
470 FilmViewer::film_change (ChangeType type, Film::Property p)
472 if (type != ChangeType::DONE) {
476 if (p == Film::Property::AUDIO_CHANNELS) {
478 } else if (p == Film::Property::VIDEO_FRAME_RATE) {
479 _video_view->set_video_frame_rate (_film->video_frame_rate());
480 } else if (p == Film::Property::THREE_D) {
481 _video_view->set_three_d (_film->three_d());
482 } else if (p == Film::Property::CONTENT) {
483 _closed_captions_dialog->update_tracks (_film);
489 FilmViewer::film_length_change ()
491 _video_view->set_length (_film->length());
495 /** Re-get the current frame slowly by seeking */
497 FilmViewer::slow_refresh ()
499 seek (_video_view->position(), true);
503 /** Try to re-get the current frame quickly by resetting the metadata
504 * in the PlayerVideo that we used last time.
505 * @return true if this was possible, false if not.
508 FilmViewer::quick_refresh ()
510 if (!_video_view || !_film || !_player) {
513 return _video_view->reset_metadata (_film, _player->video_container_size());
518 FilmViewer::seek (shared_ptr<Content> content, ContentTime t, bool accurate)
520 auto dt = _player->content_time_to_dcp (content, t);
522 seek (*dt, accurate);
528 FilmViewer::set_coalesce_player_changes (bool c)
530 _coalesce_player_changes = c;
533 player_change (_pending_player_changes);
534 _pending_player_changes.clear ();
540 FilmViewer::seek (DCPTime t, bool accurate)
550 if (t >= _film->length()) {
551 t = _film->length() - one_video_frame();
556 _closed_captions_dialog->clear ();
557 _butler->seek (t, accurate);
560 /* We're not playing, so let the GUI thread get on and
561 come back later to get the next frame after the seek.
563 request_idle_display_next_frame ();
565 /* We're going to start playing again straight away
566 so wait for the seek to finish.
568 while (_video_view->display_next_frame(false) == VideoView::AGAIN) {}
576 FilmViewer::config_changed (Config::Property p)
578 if (p == Config::AUDIO_MAPPING) {
583 if (p != Config::SOUND && p != Config::SOUND_OUTPUT) {
587 if (_audio.isStreamOpen ()) {
588 _audio.closeStream ();
591 if (Config::instance()->sound() && _audio.getDeviceCount() > 0) {
593 if (Config::instance()->sound_output()) {
594 while (st < _audio.getDeviceCount()) {
596 if (_audio.getDeviceInfo(st).name == Config::instance()->sound_output().get()) {
599 } catch (RtAudioError&) {
600 /* Something went wrong with that device so we don't want to use it anyway */
604 if (st == _audio.getDeviceCount()) {
605 st = _audio.getDefaultOutputDevice();
608 st = _audio.getDefaultOutputDevice();
612 _audio_channels = _audio.getDeviceInfo(st).outputChannels;
613 RtAudio::StreamParameters sp;
615 sp.nChannels = _audio_channels;
617 _audio.openStream (&sp, 0, RTAUDIO_FLOAT32, 48000, &_audio_block_size, &rtaudio_callback, this);
618 } catch (RtAudioError& e) {
622 _("Could not set up audio output. There will be no audio during the preview."), std_to_wx(e.what())
635 FilmViewer::uncorrected_time () const
637 if (_audio.isStreamRunning()) {
638 return DCPTime::from_seconds (const_cast<RtAudio*>(&_audio)->getStreamTime());
641 return _video_view->position();
646 FilmViewer::audio_time () const
648 if (!_audio.isStreamRunning()) {
652 return DCPTime::from_seconds (const_cast<RtAudio*>(&_audio)->getStreamTime ()) -
653 DCPTime::from_frames (average_latency(), _film->audio_frame_rate());
658 FilmViewer::time () const
660 return audio_time().get_value_or(_video_view->position());
665 FilmViewer::audio_callback (void* out_p, unsigned int frames)
668 auto t = _butler->get_audio (Butler::Behaviour::NON_BLOCKING, reinterpret_cast<float*> (out_p), frames);
669 if (!t || DCPTime(uncorrected_time() - *t) < one_video_frame()) {
670 /* There was an underrun or this audio is on time; carry on */
673 /* The audio we just got was (very) late; drop it and get some more. */
676 boost::mutex::scoped_lock lm (_latency_history_mutex, boost::try_to_lock);
678 _latency_history.push_back (_audio.getStreamLatency ());
679 if (_latency_history.size() > static_cast<size_t> (_latency_history_count)) {
680 _latency_history.pop_front ();
689 FilmViewer::average_latency () const
691 boost::mutex::scoped_lock lm (_latency_history_mutex);
692 if (_latency_history.empty()) {
697 for (auto i: _latency_history) {
701 return total / _latency_history.size();
706 FilmViewer::set_dcp_decode_reduction (optional<int> reduction)
708 _dcp_decode_reduction = reduction;
710 _player->set_dcp_decode_reduction (reduction);
716 FilmViewer::dcp_decode_reduction () const
718 return _dcp_decode_reduction;
722 optional<ContentTime>
723 FilmViewer::position_in_content (shared_ptr<const Content> content) const
725 return _player->dcp_to_content_time (content, position());
730 FilmViewer::one_video_frame () const
732 return DCPTime::from_frames (1, _film ? _film->video_frame_rate() : 24);
736 /** Open a dialog box showing our film's closed captions */
738 FilmViewer::show_closed_captions ()
740 _closed_captions_dialog->Show();
745 FilmViewer::seek_by (DCPTime by, bool accurate)
747 seek (_video_view->position() + by, accurate);
752 FilmViewer::set_pad_black (bool p)
758 /** Called when a player has finished the current film.
759 * May be called from a non-UI thread.
762 FilmViewer::finished ()
764 emit (boost::bind(&FilmViewer::ui_finished, this));
768 /** Called by finished() in the UI thread */
770 FilmViewer::ui_finished ()
778 FilmViewer::dropped () const
780 return _video_view->dropped ();
785 FilmViewer::errored () const
787 return _video_view->errored ();
792 FilmViewer::gets () const
794 return _video_view->gets ();
799 FilmViewer::image_changed (shared_ptr<PlayerVideo> pv)
801 emit (boost::bind(boost::ref(ImageChanged), pv));
806 FilmViewer::set_optimise_for_j2k (bool o)
808 _optimise_for_j2k = o;
809 _video_view->set_optimise_for_j2k (o);
814 FilmViewer::set_crop_guess (dcpomatic::Rect<float> crop)
816 if (crop != _crop_guess) {
818 _video_view->update ();
824 FilmViewer::unset_crop_guess ()
826 _crop_guess = boost::none;
827 _video_view->update ();