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 "image_decoder.h"
26 #include "image_content.h"
27 #include "sndfile_decoder.h"
28 #include "sndfile_content.h"
29 #include "subtitle_content.h"
34 #include "resampler.h"
45 using boost::shared_ptr;
46 using boost::weak_ptr;
47 using boost::dynamic_pointer_cast;
52 Piece (shared_ptr<Content> c)
54 , video_position (c->position ())
55 , audio_position (c->position ())
60 Piece (shared_ptr<Content> c, shared_ptr<Decoder> d)
63 , video_position (c->position ())
64 , audio_position (c->position ())
67 /** Set this piece to repeat a video frame a given number of times */
68 void set_repeat (IncomingVideo video, int num)
77 repeat_video.image.reset ();
82 bool repeating () const
84 return repeat_done != repeat_to_do;
87 void repeat (Player* player)
89 player->process_video (
90 repeat_video.weak_piece,
95 (repeat_done + 1) * (TIME_HZ / player->_film->video_frame_rate ())
101 shared_ptr<Content> content;
102 shared_ptr<Decoder> decoder;
103 /** Time of the last video we emitted relative to the start of the DCP */
105 /** Time of the last audio we emitted relative to the start of the DCP */
108 IncomingVideo repeat_video;
113 Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
118 , _have_valid_pieces (false)
119 , _video_position (0)
120 , _audio_position (0)
121 , _audio_merger (f->audio_channels(), bind (&Film::time_to_audio_frames, f.get(), _1), bind (&Film::audio_frames_to_time, f.get(), _1))
122 , _last_emit_was_black (false)
124 _playlist_changed_connection = _playlist->Changed.connect (bind (&Player::playlist_changed, this));
125 _playlist_content_changed_connection = _playlist->ContentChanged.connect (bind (&Player::content_changed, this, _1, _2, _3));
126 _film_changed_connection = _film->Changed.connect (bind (&Player::film_changed, this, _1));
127 set_video_container_size (fit_ratio_within (_film->container()->ratio (), _film->full_frame ()));
131 Player::disable_video ()
137 Player::disable_audio ()
145 if (!_have_valid_pieces) {
149 Time earliest_t = TIME_MAX;
150 shared_ptr<Piece> earliest;
156 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
157 if ((*i)->decoder->done ()) {
161 shared_ptr<VideoDecoder> vd = dynamic_pointer_cast<VideoDecoder> ((*i)->decoder);
162 shared_ptr<AudioDecoder> ad = dynamic_pointer_cast<AudioDecoder> ((*i)->decoder);
165 if ((*i)->video_position < earliest_t) {
166 earliest_t = (*i)->video_position;
172 if (_audio && ad && ad->has_audio ()) {
173 if ((*i)->audio_position < earliest_t) {
174 earliest_t = (*i)->audio_position;
188 if (earliest_t > _video_position) {
191 if (earliest->repeating ()) {
192 earliest->repeat (this);
194 earliest->decoder->pass ();
200 if (earliest_t > _audio_position) {
201 emit_silence (_film->time_to_audio_frames (earliest_t - _audio_position));
203 earliest->decoder->pass ();
205 if (earliest->decoder->done()) {
206 shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (earliest->content);
208 shared_ptr<Resampler> re = resampler (ac, false);
210 shared_ptr<const AudioBuffers> b = re->flush ();
212 process_audio (earliest, b, ac->audio_length ());
221 boost::optional<Time> audio_done_up_to;
222 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
223 if ((*i)->decoder->done ()) {
227 if (dynamic_pointer_cast<AudioDecoder> ((*i)->decoder)) {
228 audio_done_up_to = min (audio_done_up_to.get_value_or (TIME_MAX), (*i)->audio_position);
232 if (audio_done_up_to) {
233 TimedAudioBuffers<Time> tb = _audio_merger.pull (audio_done_up_to.get ());
234 Audio (tb.audio, tb.time);
235 _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
242 /** @param extra Amount of extra time to add to the content frame's time (for repeat) */
244 Player::process_video (weak_ptr<Piece> weak_piece, shared_ptr<const Image> image, Eyes eyes, bool same, VideoContent::Frame frame, Time extra)
246 /* Keep a note of what came in so that we can repeat it if required */
247 _last_incoming_video.weak_piece = weak_piece;
248 _last_incoming_video.image = image;
249 _last_incoming_video.eyes = eyes;
250 _last_incoming_video.same = same;
251 _last_incoming_video.frame = frame;
252 _last_incoming_video.extra = extra;
254 shared_ptr<Piece> piece = weak_piece.lock ();
259 shared_ptr<VideoContent> content = dynamic_pointer_cast<VideoContent> (piece->content);
262 FrameRateConversion frc (content->video_frame_rate(), _film->video_frame_rate());
263 if (frc.skip && (frame % 2) == 1) {
267 Time const relative_time = (frame * frc.factor() * TIME_HZ / _film->video_frame_rate());
268 if (content->trimmed (relative_time)) {
272 Time const time = content->position() + relative_time + extra - content->trim_start ();
273 float const ratio = content->ratio() ? content->ratio()->ratio() : content->video_size_after_crop().ratio();
274 libdcp::Size const image_size = fit_ratio_within (ratio, _video_container_size);
276 shared_ptr<PlayerImage> pi (
281 _video_container_size,
286 if (_film->with_subtitles () && _out_subtitle.image && time >= _out_subtitle.from && time <= _out_subtitle.to) {
288 Position<int> const container_offset (
289 (_video_container_size.width - image_size.width) / 2,
290 (_video_container_size.height - image_size.width) / 2
293 pi->set_subtitle (_out_subtitle.image, _out_subtitle.position + container_offset);
296 #ifdef DCPOMATIC_DEBUG
297 _last_video = piece->content;
300 Video (pi, eyes, content->colour_conversion(), same, time);
302 _last_emit_was_black = false;
303 _video_position = piece->video_position = (time + TIME_HZ / _film->video_frame_rate());
305 if (frc.repeat > 1 && !piece->repeating ()) {
306 piece->set_repeat (_last_incoming_video, frc.repeat - 1);
311 Player::process_audio (weak_ptr<Piece> weak_piece, shared_ptr<const AudioBuffers> audio, AudioContent::Frame frame)
313 shared_ptr<Piece> piece = weak_piece.lock ();
318 shared_ptr<AudioContent> content = dynamic_pointer_cast<AudioContent> (piece->content);
322 if (content->audio_gain() != 0) {
323 shared_ptr<AudioBuffers> gain (new AudioBuffers (audio));
324 gain->apply_gain (content->audio_gain ());
329 if (content->content_audio_frame_rate() != content->output_audio_frame_rate()) {
330 shared_ptr<Resampler> r = resampler (content, true);
331 pair<shared_ptr<const AudioBuffers>, AudioContent::Frame> ro = r->run (audio, frame);
336 Time const relative_time = _film->audio_frames_to_time (frame);
338 if (content->trimmed (relative_time)) {
342 Time time = content->position() + (content->audio_delay() * TIME_HZ / 1000) + relative_time - content->trim_start ();
345 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), audio->frames()));
346 dcp_mapped->make_silent ();
347 list<pair<int, libdcp::Channel> > map = content->audio_mapping().content_to_dcp ();
348 for (list<pair<int, libdcp::Channel> >::iterator i = map.begin(); i != map.end(); ++i) {
349 if (i->first < audio->channels() && i->second < dcp_mapped->channels()) {
350 dcp_mapped->accumulate_channel (audio.get(), i->first, i->second);
356 /* We must cut off anything that comes before the start of all time */
358 int const frames = - time * _film->audio_frame_rate() / TIME_HZ;
359 if (frames >= audio->frames ()) {
363 shared_ptr<AudioBuffers> trimmed (new AudioBuffers (audio->channels(), audio->frames() - frames));
364 trimmed->copy_from (audio.get(), audio->frames() - frames, frames, 0);
370 _audio_merger.push (audio, time);
371 piece->audio_position += _film->audio_frames_to_time (audio->frames ());
377 TimedAudioBuffers<Time> tb = _audio_merger.flush ();
378 if (_audio && tb.audio) {
379 Audio (tb.audio, tb.time);
380 _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
383 while (_video && _video_position < _audio_position) {
387 while (_audio && _audio_position < _video_position) {
388 emit_silence (_film->time_to_audio_frames (_video_position - _audio_position));
393 /** Seek so that the next pass() will yield (approximately) the requested frame.
394 * Pass accurate = true to try harder to get close to the request.
395 * @return true on error
398 Player::seek (Time t, bool accurate)
400 if (!_have_valid_pieces) {
404 if (_pieces.empty ()) {
408 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
409 shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> ((*i)->content);
414 /* s is the offset of t from the start position of this content */
415 Time s = t - vc->position ();
416 s = max (static_cast<Time> (0), s);
417 s = min (vc->length_after_trim(), s);
419 /* Hence set the piece positions to the `global' time */
420 (*i)->video_position = (*i)->audio_position = vc->position() + s;
422 /* And seek the decoder */
423 dynamic_pointer_cast<VideoDecoder>((*i)->decoder)->seek (
424 vc->time_to_content_video_frames (s + vc->trim_start ()), accurate
427 (*i)->reset_repeat ();
430 _video_position = _audio_position = t;
432 /* XXX: don't seek audio because we don't need to... */
436 Player::setup_pieces ()
438 list<shared_ptr<Piece> > old_pieces = _pieces;
442 ContentList content = _playlist->content ();
443 sort (content.begin(), content.end(), ContentSorter ());
445 for (ContentList::iterator i = content.begin(); i != content.end(); ++i) {
447 shared_ptr<Piece> piece (new Piece (*i));
449 /* XXX: into content? */
451 shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (*i);
453 shared_ptr<FFmpegDecoder> fd (new FFmpegDecoder (_film, fc, _video, _audio));
455 fd->Video.connect (bind (&Player::process_video, this, weak_ptr<Piece> (piece), _1, _2, _3, _4, 0));
456 fd->Audio.connect (bind (&Player::process_audio, this, weak_ptr<Piece> (piece), _1, _2));
457 fd->Subtitle.connect (bind (&Player::process_subtitle, this, weak_ptr<Piece> (piece), _1, _2, _3, _4));
459 fd->seek (fc->time_to_content_video_frames (fc->trim_start ()), true);
463 shared_ptr<const ImageContent> ic = dynamic_pointer_cast<const ImageContent> (*i);
465 bool reusing = false;
467 /* See if we can re-use an old ImageDecoder */
468 for (list<shared_ptr<Piece> >::const_iterator j = old_pieces.begin(); j != old_pieces.end(); ++j) {
469 shared_ptr<ImageDecoder> imd = dynamic_pointer_cast<ImageDecoder> ((*j)->decoder);
470 if (imd && imd->content() == ic) {
477 shared_ptr<ImageDecoder> id (new ImageDecoder (_film, ic));
478 id->Video.connect (bind (&Player::process_video, this, weak_ptr<Piece> (piece), _1, _2, _3, _4, 0));
483 shared_ptr<const SndfileContent> sc = dynamic_pointer_cast<const SndfileContent> (*i);
485 shared_ptr<AudioDecoder> sd (new SndfileDecoder (_film, sc));
486 sd->Audio.connect (bind (&Player::process_audio, this, weak_ptr<Piece> (piece), _1, _2));
491 _pieces.push_back (piece);
494 _have_valid_pieces = true;
498 Player::content_changed (weak_ptr<Content> w, int property, bool frequent)
500 shared_ptr<Content> c = w.lock ();
506 property == ContentProperty::POSITION || property == ContentProperty::LENGTH ||
507 property == ContentProperty::TRIM_START || property == ContentProperty::TRIM_END ||
508 property == VideoContentProperty::VIDEO_FRAME_TYPE
511 _have_valid_pieces = false;
514 } else if (property == SubtitleContentProperty::SUBTITLE_OFFSET || property == SubtitleContentProperty::SUBTITLE_SCALE) {
519 } else if (property == VideoContentProperty::VIDEO_CROP || property == VideoContentProperty::VIDEO_RATIO) {
523 } else if (property == ContentProperty::PATH) {
530 Player::playlist_changed ()
532 _have_valid_pieces = false;
537 Player::set_video_container_size (libdcp::Size s)
539 _video_container_size = s;
541 shared_ptr<Image> im (new Image (PIX_FMT_RGB24, _video_container_size, true));
548 _video_container_size,
549 _video_container_size,
550 Scaler::from_id ("bicubic")
555 shared_ptr<Resampler>
556 Player::resampler (shared_ptr<AudioContent> c, bool create)
558 map<shared_ptr<AudioContent>, shared_ptr<Resampler> >::iterator i = _resamplers.find (c);
559 if (i != _resamplers.end ()) {
564 return shared_ptr<Resampler> ();
569 "Creating new resampler for %1 to %2 with %3 channels", c->content_audio_frame_rate(), c->output_audio_frame_rate(), c->audio_channels()
573 shared_ptr<Resampler> r (new Resampler (c->content_audio_frame_rate(), c->output_audio_frame_rate(), c->audio_channels()));
579 Player::emit_black ()
581 #ifdef DCPOMATIC_DEBUG
582 _last_video.reset ();
585 Video (_black_frame, EYES_BOTH, ColourConversion(), _last_emit_was_black, _video_position);
586 _video_position += _film->video_frames_to_time (1);
587 _last_emit_was_black = true;
591 Player::emit_silence (OutputAudioFrame most)
597 OutputAudioFrame N = min (most, _film->audio_frame_rate() / 2);
598 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), N));
599 silence->make_silent ();
600 Audio (silence, _audio_position);
601 _audio_position += _film->audio_frames_to_time (N);
605 Player::film_changed (Film::Property p)
607 /* Here we should notice Film properties that affect our output, and
608 alert listeners that our output now would be different to how it was
609 last time we were run.
612 if (p == Film::SCALER || p == Film::WITH_SUBTITLES || p == Film::CONTAINER) {
618 Player::process_subtitle (weak_ptr<Piece> weak_piece, shared_ptr<Image> image, dcpomatic::Rect<double> rect, Time from, Time to)
620 _in_subtitle.piece = weak_piece;
621 _in_subtitle.image = image;
622 _in_subtitle.rect = rect;
623 _in_subtitle.from = from;
624 _in_subtitle.to = to;
630 Player::update_subtitle ()
632 shared_ptr<Piece> piece = _in_subtitle.piece.lock ();
637 if (!_in_subtitle.image) {
638 _out_subtitle.image.reset ();
642 shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (piece->content);
645 dcpomatic::Rect<double> in_rect = _in_subtitle.rect;
646 libdcp::Size scaled_size;
648 in_rect.y += sc->subtitle_offset ();
650 /* We will scale the subtitle up to fit _video_container_size, and also by the additional subtitle_scale */
651 scaled_size.width = in_rect.width * _video_container_size.width * sc->subtitle_scale ();
652 scaled_size.height = in_rect.height * _video_container_size.height * sc->subtitle_scale ();
654 /* Then we need a corrective translation, consisting of two parts:
656 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
657 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
659 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
660 * (width_before_subtitle_scale * (1 - subtitle_scale) / 2) and
661 * (height_before_subtitle_scale * (1 - subtitle_scale) / 2).
663 * Combining these two translations gives these expressions.
666 _out_subtitle.position.x = rint (_video_container_size.width * (in_rect.x + (in_rect.width * (1 - sc->subtitle_scale ()) / 2)));
667 _out_subtitle.position.y = rint (_video_container_size.height * (in_rect.y + (in_rect.height * (1 - sc->subtitle_scale ()) / 2)));
669 _out_subtitle.image = _in_subtitle.image->scale (
671 Scaler::from_id ("bicubic"),
672 _in_subtitle.image->pixel_format (),
675 _out_subtitle.from = _in_subtitle.from + piece->content->position ();
676 _out_subtitle.to = _in_subtitle.to + piece->content->position ();
679 /** Re-emit the last frame that was emitted, using current settings for crop, ratio, scaler and subtitles.
680 * @return false if this could not be done.
683 Player::repeat_last_video ()
685 if (!_last_incoming_video.image || !_have_valid_pieces) {
690 _last_incoming_video.weak_piece,
691 _last_incoming_video.image,
692 _last_incoming_video.eyes,
693 _last_incoming_video.same,
694 _last_incoming_video.frame,
695 _last_incoming_video.extra
701 PlayerImage::PlayerImage (
702 shared_ptr<const Image> in,
704 libdcp::Size inter_size,
705 libdcp::Size out_size,
706 Scaler const * scaler
710 , _inter_size (inter_size)
711 , _out_size (out_size)
718 PlayerImage::set_subtitle (shared_ptr<const Image> image, Position<int> pos)
720 _subtitle_image = image;
721 _subtitle_position = pos;
725 PlayerImage::image ()
727 shared_ptr<Image> out = _in->crop_scale_window (_crop, _inter_size, _out_size, _scaler, PIX_FMT_RGB24, false);
729 Position<int> const container_offset ((_out_size.width - _inter_size.width) / 2, (_out_size.height - _inter_size.width) / 2);
731 if (_subtitle_image) {
732 out->alpha_blend (_subtitle_image, _subtitle_position);