2 Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include "ffmpeg_decoder.h"
24 #include "ffmpeg_content.h"
25 #include "still_image_decoder.h"
26 #include "still_image_content.h"
27 #include "moving_image_decoder.h"
28 #include "moving_image_content.h"
29 #include "sndfile_decoder.h"
30 #include "sndfile_content.h"
31 #include "subtitle_content.h"
36 #include "resampler.h"
47 using boost::shared_ptr;
48 using boost::weak_ptr;
49 using boost::dynamic_pointer_cast;
51 //#define DEBUG_PLAYER 1
56 Piece (shared_ptr<Content> c)
58 , video_position (c->position ())
59 , audio_position (c->position ())
62 Piece (shared_ptr<Content> c, shared_ptr<Decoder> d)
65 , video_position (c->position ())
66 , audio_position (c->position ())
69 shared_ptr<Content> content;
70 shared_ptr<Decoder> decoder;
76 std::ostream& operator<<(std::ostream& s, Piece const & p)
78 if (dynamic_pointer_cast<FFmpegContent> (p.content)) {
80 } else if (dynamic_pointer_cast<StillImageContent> (p.content)) {
82 } else if (dynamic_pointer_cast<SndfileContent> (p.content)) {
86 s << " at " << p.content->position() << " until " << p.content->end();
92 Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
97 , _have_valid_pieces (false)
100 , _audio_merger (f->audio_channels(), bind (&Film::time_to_audio_frames, f.get(), _1), bind (&Film::audio_frames_to_time, f.get(), _1))
101 , _last_emit_was_black (false)
103 _playlist_changed_connection = _playlist->Changed.connect (bind (&Player::playlist_changed, this));
104 _playlist_content_changed_connection = _playlist->ContentChanged.connect (bind (&Player::content_changed, this, _1, _2, _3));
105 _film_changed_connection = _film->Changed.connect (bind (&Player::film_changed, this, _1));
106 set_video_container_size (_film->container()->size (_film->full_frame ()));
110 Player::disable_video ()
116 Player::disable_audio ()
124 if (!_have_valid_pieces) {
126 _have_valid_pieces = true;
133 Time earliest_t = TIME_MAX;
134 shared_ptr<Piece> earliest;
140 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
141 if ((*i)->decoder->done ()) {
145 if (_video && dynamic_pointer_cast<VideoDecoder> ((*i)->decoder)) {
146 if ((*i)->video_position < earliest_t) {
147 earliest_t = (*i)->video_position;
153 if (_audio && dynamic_pointer_cast<AudioDecoder> ((*i)->decoder)) {
154 if ((*i)->audio_position < earliest_t) {
155 earliest_t = (*i)->audio_position;
164 cout << "no earliest piece.\n";
173 if (earliest_t > _video_position) {
175 cout << "no video here; emitting black frame (earliest=" << earliest_t << ", video_position=" << _video_position << ").\n";
180 cout << "Pass video " << *earliest << "\n";
182 earliest->decoder->pass ();
187 if (earliest_t > _audio_position) {
189 cout << "no audio here (none until " << earliest_t << "); emitting silence.\n";
191 emit_silence (_film->time_to_audio_frames (earliest_t - _audio_position));
194 cout << "Pass audio " << *earliest << "\n";
196 earliest->decoder->pass ();
198 if (earliest->decoder->done()) {
199 shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (earliest->content);
201 shared_ptr<Resampler> re = resampler (ac, false);
203 shared_ptr<const AudioBuffers> b = re->flush ();
205 process_audio (earliest, b, ac->audio_length ());
214 Time audio_done_up_to = TIME_MAX;
215 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
216 if (dynamic_pointer_cast<AudioDecoder> ((*i)->decoder)) {
217 audio_done_up_to = min (audio_done_up_to, (*i)->audio_position);
221 TimedAudioBuffers<Time> tb = _audio_merger.pull (audio_done_up_to);
222 Audio (tb.audio, tb.time);
223 _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
227 cout << "\tpost pass _video_position=" << _video_position << " _audio_position=" << _audio_position << "\n";
234 Player::process_video (weak_ptr<Piece> weak_piece, shared_ptr<const Image> image, Eyes eyes, bool same, VideoContent::Frame frame)
236 shared_ptr<Piece> piece = weak_piece.lock ();
241 shared_ptr<VideoContent> content = dynamic_pointer_cast<VideoContent> (piece->content);
244 FrameRateConversion frc (content->video_frame_rate(), _film->video_frame_rate());
245 if (frc.skip && (frame % 2) == 1) {
249 Time const relative_time = (frame * frc.factor() * TIME_HZ / _film->video_frame_rate());
250 if (content->trimmed (relative_time)) {
254 shared_ptr<Image> work_image = image->crop (content->crop(), true);
256 libdcp::Size const image_size = content->ratio()->size (_video_container_size);
258 work_image = work_image->scale_and_convert_to_rgb (image_size, _film->scaler(), true);
260 Time time = content->position() + relative_time - content->trim_start ();
262 if (_film->with_subtitles () && _out_subtitle.image && time >= _out_subtitle.from && time <= _out_subtitle.to) {
263 work_image->alpha_blend (_out_subtitle.image, _out_subtitle.position);
266 if (image_size != _video_container_size) {
267 assert (image_size.width <= _video_container_size.width);
268 assert (image_size.height <= _video_container_size.height);
269 shared_ptr<Image> im (new Image (PIX_FMT_RGB24, _video_container_size, true));
271 im->copy (work_image, Position<int> ((_video_container_size.width - image_size.width) / 2, (_video_container_size.height - image_size.height) / 2));
275 #ifdef DCPOMATIC_DEBUG
276 _last_video = piece->content;
279 Video (work_image, eyes, same, time);
280 time += TIME_HZ / _film->video_frame_rate();
283 Video (work_image, eyes, true, time);
284 time += TIME_HZ / _film->video_frame_rate();
287 _last_emit_was_black = false;
289 _video_position = piece->video_position = time;
293 Player::process_audio (weak_ptr<Piece> weak_piece, shared_ptr<const AudioBuffers> audio, AudioContent::Frame frame)
295 shared_ptr<Piece> piece = weak_piece.lock ();
300 shared_ptr<AudioContent> content = dynamic_pointer_cast<AudioContent> (piece->content);
304 if (content->content_audio_frame_rate() != content->output_audio_frame_rate()) {
305 shared_ptr<Resampler> r = resampler (content, true);
306 pair<shared_ptr<const AudioBuffers>, AudioContent::Frame> ro = r->run (audio, frame);
311 Time const relative_time = _film->audio_frames_to_time (frame);
313 if (content->trimmed (relative_time)) {
317 Time time = content->position() + (content->audio_delay() * TIME_HZ / 1000) + relative_time;
320 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), audio->frames()));
321 dcp_mapped->make_silent ();
322 list<pair<int, libdcp::Channel> > map = content->audio_mapping().content_to_dcp ();
323 for (list<pair<int, libdcp::Channel> >::iterator i = map.begin(); i != map.end(); ++i) {
324 if (i->first < audio->channels() && i->second < dcp_mapped->channels()) {
325 dcp_mapped->accumulate_channel (audio.get(), i->first, i->second);
331 /* We must cut off anything that comes before the start of all time */
333 int const frames = - time * _film->audio_frame_rate() / TIME_HZ;
334 if (frames >= audio->frames ()) {
338 shared_ptr<AudioBuffers> trimmed (new AudioBuffers (audio->channels(), audio->frames() - frames));
339 trimmed->copy_from (audio.get(), audio->frames() - frames, frames, 0);
345 _audio_merger.push (audio, time);
346 piece->audio_position += _film->audio_frames_to_time (audio->frames ());
352 TimedAudioBuffers<Time> tb = _audio_merger.flush ();
354 Audio (tb.audio, tb.time);
355 _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
358 while (_video_position < _audio_position) {
362 while (_audio_position < _video_position) {
363 emit_silence (_film->time_to_audio_frames (_video_position - _audio_position));
368 /** Seek so that the next pass() will yield (approximately) the requested frame.
369 * Pass accurate = true to try harder to get close to the request.
370 * @return true on error
373 Player::seek (Time t, bool accurate)
375 if (!_have_valid_pieces) {
377 _have_valid_pieces = true;
380 if (_pieces.empty ()) {
384 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
385 shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> ((*i)->content);
390 Time s = t - vc->position ();
391 s = max (static_cast<Time> (0), s);
392 s = min (vc->length_after_trim(), s);
394 (*i)->video_position = (*i)->audio_position = vc->position() + s;
396 FrameRateConversion frc (vc->video_frame_rate(), _film->video_frame_rate());
397 /* Here we are converting from time (in the DCP) to a frame number in the content.
398 Hence we need to use the DCP's frame rate and the double/skip correction, not
401 VideoContent::Frame f = (s + vc->trim_start ()) * _film->video_frame_rate() / (frc.factor() * TIME_HZ);
402 dynamic_pointer_cast<VideoDecoder>((*i)->decoder)->seek (f, accurate);
405 _video_position = _audio_position = t;
407 /* XXX: don't seek audio because we don't need to... */
411 Player::setup_pieces ()
413 list<shared_ptr<Piece> > old_pieces = _pieces;
417 ContentList content = _playlist->content ();
418 sort (content.begin(), content.end(), ContentSorter ());
420 for (ContentList::iterator i = content.begin(); i != content.end(); ++i) {
422 shared_ptr<Piece> piece (new Piece (*i));
424 /* XXX: into content? */
426 shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (*i);
428 shared_ptr<FFmpegDecoder> fd (new FFmpegDecoder (_film, fc, _video, _audio));
430 fd->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3, _4));
431 fd->Audio.connect (bind (&Player::process_audio, this, piece, _1, _2));
432 fd->Subtitle.connect (bind (&Player::process_subtitle, this, piece, _1, _2, _3, _4));
437 shared_ptr<const StillImageContent> ic = dynamic_pointer_cast<const StillImageContent> (*i);
439 shared_ptr<StillImageDecoder> id;
441 /* See if we can re-use an old StillImageDecoder */
442 for (list<shared_ptr<Piece> >::const_iterator j = old_pieces.begin(); j != old_pieces.end(); ++j) {
443 shared_ptr<StillImageDecoder> imd = dynamic_pointer_cast<StillImageDecoder> ((*j)->decoder);
444 if (imd && imd->content() == ic) {
450 id.reset (new StillImageDecoder (_film, ic));
451 id->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3, _4));
457 shared_ptr<const MovingImageContent> mc = dynamic_pointer_cast<const MovingImageContent> (*i);
459 shared_ptr<MovingImageDecoder> md;
462 md.reset (new MovingImageDecoder (_film, mc));
463 md->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3, _4));
469 shared_ptr<const SndfileContent> sc = dynamic_pointer_cast<const SndfileContent> (*i);
471 shared_ptr<AudioDecoder> sd (new SndfileDecoder (_film, sc));
472 sd->Audio.connect (bind (&Player::process_audio, this, piece, _1, _2));
477 _pieces.push_back (piece);
481 cout << "=== Player setup:\n";
482 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
483 cout << *(i->get()) << "\n";
489 Player::content_changed (weak_ptr<Content> w, int property, bool frequent)
491 shared_ptr<Content> c = w.lock ();
497 property == ContentProperty::POSITION || property == ContentProperty::LENGTH ||
498 property == ContentProperty::TRIM_START || property == ContentProperty::TRIM_END ||
499 property == VideoContentProperty::VIDEO_CROP || property == VideoContentProperty::VIDEO_RATIO
502 _have_valid_pieces = false;
505 } else if (property == SubtitleContentProperty::SUBTITLE_OFFSET || property == SubtitleContentProperty::SUBTITLE_SCALE) {
508 } else if (property == VideoContentProperty::VIDEO_FRAME_TYPE) {
514 Player::playlist_changed ()
516 _have_valid_pieces = false;
521 Player::set_video_container_size (libdcp::Size s)
523 _video_container_size = s;
524 _black_frame.reset (new Image (PIX_FMT_RGB24, _video_container_size, true));
525 _black_frame->make_black ();
528 shared_ptr<Resampler>
529 Player::resampler (shared_ptr<AudioContent> c, bool create)
531 map<shared_ptr<AudioContent>, shared_ptr<Resampler> >::iterator i = _resamplers.find (c);
532 if (i != _resamplers.end ()) {
537 return shared_ptr<Resampler> ();
540 shared_ptr<Resampler> r (new Resampler (c->content_audio_frame_rate(), c->output_audio_frame_rate(), c->audio_channels()));
546 Player::emit_black ()
548 #ifdef DCPOMATIC_DEBUG
549 _last_video.reset ();
552 Video (_black_frame, EYES_BOTH, _last_emit_was_black, _video_position);
553 _video_position += _film->video_frames_to_time (1);
554 _last_emit_was_black = true;
558 Player::emit_silence (OutputAudioFrame most)
560 OutputAudioFrame N = min (most, _film->audio_frame_rate() / 2);
561 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), N));
562 silence->make_silent ();
563 Audio (silence, _audio_position);
564 _audio_position += _film->audio_frames_to_time (N);
568 Player::film_changed (Film::Property p)
570 /* Here we should notice Film properties that affect our output, and
571 alert listeners that our output now would be different to how it was
572 last time we were run.
575 if (p == Film::SCALER || p == Film::WITH_SUBTITLES || p == Film::CONTAINER) {
581 Player::process_subtitle (weak_ptr<Piece> weak_piece, shared_ptr<Image> image, dcpomatic::Rect<double> rect, Time from, Time to)
583 _in_subtitle.piece = weak_piece;
584 _in_subtitle.image = image;
585 _in_subtitle.rect = rect;
586 _in_subtitle.from = from;
587 _in_subtitle.to = to;
593 Player::update_subtitle ()
595 shared_ptr<Piece> piece = _in_subtitle.piece.lock ();
600 if (!_in_subtitle.image) {
601 _out_subtitle.image.reset ();
605 shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (piece->content);
608 dcpomatic::Rect<double> in_rect = _in_subtitle.rect;
609 libdcp::Size scaled_size;
611 in_rect.y += sc->subtitle_offset ();
613 /* We will scale the subtitle up to fit _video_container_size, and also by the additional subtitle_scale */
614 scaled_size.width = in_rect.width * _video_container_size.width * sc->subtitle_scale ();
615 scaled_size.height = in_rect.height * _video_container_size.height * sc->subtitle_scale ();
617 /* Then we need a corrective translation, consisting of two parts:
619 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
620 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
622 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
623 * (width_before_subtitle_scale * (1 - subtitle_scale) / 2) and
624 * (height_before_subtitle_scale * (1 - subtitle_scale) / 2).
626 * Combining these two translations gives these expressions.
629 _out_subtitle.position.x = rint (_video_container_size.width * (in_rect.x + (in_rect.width * (1 - sc->subtitle_scale ()) / 2)));
630 _out_subtitle.position.y = rint (_video_container_size.height * (in_rect.y + (in_rect.height * (1 - sc->subtitle_scale ()) / 2)));
632 _out_subtitle.image = _in_subtitle.image->scale (libdcp::Size (scaled_size.width, scaled_size.height), Scaler::from_id ("bicubic"), true);
633 _out_subtitle.from = _in_subtitle.from + piece->content->position ();
634 _out_subtitle.to = _in_subtitle.to + piece->content->position ();