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->start ())
59 , audio_position (c->start ())
62 Piece (shared_ptr<Content> c, shared_ptr<Decoder> d)
65 , video_position (c->start ())
66 , audio_position (c->start ())
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->start() << " 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))
102 _playlist->Changed.connect (bind (&Player::playlist_changed, this));
103 _playlist->ContentChanged.connect (bind (&Player::content_changed, this, _1, _2, _3));
104 _film->Changed.connect (bind (&Player::film_changed, this, _1));
105 set_video_container_size (_film->container()->size (_film->full_frame ()));
109 Player::disable_video ()
115 Player::disable_audio ()
123 if (!_have_valid_pieces) {
125 _have_valid_pieces = true;
132 Time earliest_t = TIME_MAX;
133 shared_ptr<Piece> earliest;
139 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
140 if ((*i)->decoder->done ()) {
144 if (_video && dynamic_pointer_cast<VideoDecoder> ((*i)->decoder)) {
145 if ((*i)->video_position < earliest_t) {
146 earliest_t = (*i)->video_position;
152 if (_audio && dynamic_pointer_cast<AudioDecoder> ((*i)->decoder)) {
153 if ((*i)->audio_position < earliest_t) {
154 earliest_t = (*i)->audio_position;
163 cout << "no earliest piece.\n";
172 if (earliest_t > _video_position) {
174 cout << "no video here; emitting black frame (earliest=" << earliest_t << ", video_position=" << _video_position << ").\n";
179 cout << "Pass " << *earliest << "\n";
181 earliest->decoder->pass ();
186 if (earliest_t > _audio_position) {
188 cout << "no audio here; emitting silence.\n";
190 emit_silence (_film->time_to_audio_frames (earliest_t - _audio_position));
193 cout << "Pass " << *earliest << "\n";
195 earliest->decoder->pass ();
197 if (earliest->decoder->done()) {
198 shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (earliest->content);
200 shared_ptr<Resampler> re = resampler (ac, false);
202 shared_ptr<const AudioBuffers> b = re->flush ();
204 process_audio (earliest, b, ac->audio_length ());
214 cout << "\tpost pass " << _video_position << " " << _audio_position << "\n";
221 Player::process_video (weak_ptr<Piece> weak_piece, shared_ptr<const Image> image, Eyes eyes, bool same, VideoContent::Frame frame)
223 shared_ptr<Piece> piece = weak_piece.lock ();
228 shared_ptr<VideoContent> content = dynamic_pointer_cast<VideoContent> (piece->content);
231 FrameRateConversion frc (content->video_frame_rate(), _film->video_frame_rate());
232 if (frc.skip && (frame % 2) == 1) {
236 shared_ptr<Image> work_image = image->crop (content->crop(), true);
238 libdcp::Size const image_size = content->ratio()->size (_video_container_size);
240 work_image = work_image->scale_and_convert_to_rgb (image_size, _film->scaler(), true);
242 Time time = content->start() + (frame * frc.factor() * TIME_HZ / _film->video_frame_rate());
244 if (_film->with_subtitles () && _out_subtitle.image && time >= _out_subtitle.from && time <= _out_subtitle.to) {
245 work_image->alpha_blend (_out_subtitle.image, _out_subtitle.position);
248 if (image_size != _video_container_size) {
249 assert (image_size.width <= _video_container_size.width);
250 assert (image_size.height <= _video_container_size.height);
251 shared_ptr<Image> im (new Image (PIX_FMT_RGB24, _video_container_size, true));
253 im->copy (work_image, Position<int> ((_video_container_size.width - image_size.width) / 2, (_video_container_size.height - image_size.height) / 2));
257 #ifdef DCPOMATIC_DEBUG
258 _last_video = piece->content;
261 Video (work_image, eyes, same, time);
262 time += TIME_HZ / _film->video_frame_rate();
265 Video (work_image, eyes, true, time);
266 time += TIME_HZ / _film->video_frame_rate();
269 _video_position = piece->video_position = time;
273 Player::process_audio (weak_ptr<Piece> weak_piece, shared_ptr<const AudioBuffers> audio, AudioContent::Frame frame)
275 shared_ptr<Piece> piece = weak_piece.lock ();
280 shared_ptr<AudioContent> content = dynamic_pointer_cast<AudioContent> (piece->content);
284 if (content->content_audio_frame_rate() != content->output_audio_frame_rate()) {
285 shared_ptr<Resampler> r = resampler (content, true);
286 pair<shared_ptr<const AudioBuffers>, AudioContent::Frame> ro = r->run (audio, frame);
292 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), audio->frames()));
293 dcp_mapped->make_silent ();
294 list<pair<int, libdcp::Channel> > map = content->audio_mapping().content_to_dcp ();
295 for (list<pair<int, libdcp::Channel> >::iterator i = map.begin(); i != map.end(); ++i) {
296 if (i->first < audio->channels() && i->second < dcp_mapped->channels()) {
297 dcp_mapped->accumulate_channel (audio.get(), i->first, i->second);
303 Time time = content->start()
304 + _film->audio_frames_to_time (frame)
305 + (content->audio_delay() * TIME_HZ / 1000);
307 /* We must cut off anything that comes before the start of all time */
309 int const frames = - time * _film->audio_frame_rate() / TIME_HZ;
310 if (frames >= audio->frames ()) {
314 shared_ptr<AudioBuffers> trimmed (new AudioBuffers (audio->channels(), audio->frames() - frames));
315 trimmed->copy_from (audio.get(), audio->frames() - frames, frames, 0);
321 cout << "push " << audio->frames() << " @ " << time << " from " << content->path() << "\n";
322 TimedAudioBuffers<Time> tb = _audio_merger.push (audio, time);
323 piece->audio_position += _film->audio_frames_to_time (audio->frames ());
326 Audio (tb.audio, tb.time);
327 _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
328 cout << "output " << tb.audio->frames() << " @ " << tb.time << "\n";
335 TimedAudioBuffers<Time> tb = _audio_merger.flush ();
337 Audio (tb.audio, tb.time);
338 _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
341 while (_video_position < _audio_position) {
345 while (_audio_position < _video_position) {
346 emit_silence (_film->time_to_audio_frames (_video_position - _audio_position));
351 /** Seek so that the next pass() will yield (approximately) the requested frame.
352 * Pass accurate = true to try harder to get close to the request.
353 * @return true on error
356 Player::seek (Time t, bool accurate)
358 if (!_have_valid_pieces) {
360 _have_valid_pieces = true;
363 if (_pieces.empty ()) {
367 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
368 shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> ((*i)->content);
373 Time s = t - vc->start ();
374 s = max (static_cast<Time> (0), s);
375 s = min (vc->length(), s);
377 (*i)->video_position = (*i)->audio_position = vc->start() + s;
379 FrameRateConversion frc (vc->video_frame_rate(), _film->video_frame_rate());
380 /* Here we are converting from time (in the DCP) to a frame number in the content.
381 Hence we need to use the DCP's frame rate and the double/skip correction, not
384 VideoContent::Frame f = s * _film->video_frame_rate() / (frc.factor() * TIME_HZ);
385 dynamic_pointer_cast<VideoDecoder>((*i)->decoder)->seek (f, accurate);
388 _video_position = _audio_position = t;
390 /* XXX: don't seek audio because we don't need to... */
394 Player::setup_pieces ()
396 list<shared_ptr<Piece> > old_pieces = _pieces;
400 ContentList content = _playlist->content ();
401 sort (content.begin(), content.end(), ContentSorter ());
403 for (ContentList::iterator i = content.begin(); i != content.end(); ++i) {
405 shared_ptr<Piece> piece (new Piece (*i));
407 /* XXX: into content? */
409 shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (*i);
411 shared_ptr<FFmpegDecoder> fd (new FFmpegDecoder (_film, fc, _video, _audio));
413 fd->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3, _4));
414 fd->Audio.connect (bind (&Player::process_audio, this, piece, _1, _2));
415 fd->Subtitle.connect (bind (&Player::process_subtitle, this, piece, _1, _2, _3, _4));
420 shared_ptr<const StillImageContent> ic = dynamic_pointer_cast<const StillImageContent> (*i);
422 shared_ptr<StillImageDecoder> id;
424 /* See if we can re-use an old StillImageDecoder */
425 for (list<shared_ptr<Piece> >::const_iterator j = old_pieces.begin(); j != old_pieces.end(); ++j) {
426 shared_ptr<StillImageDecoder> imd = dynamic_pointer_cast<StillImageDecoder> ((*j)->decoder);
427 if (imd && imd->content() == ic) {
433 id.reset (new StillImageDecoder (_film, ic));
434 id->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3, _4));
440 shared_ptr<const MovingImageContent> mc = dynamic_pointer_cast<const MovingImageContent> (*i);
442 shared_ptr<MovingImageDecoder> md;
445 md.reset (new MovingImageDecoder (_film, mc));
446 md->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3, _4));
452 shared_ptr<const SndfileContent> sc = dynamic_pointer_cast<const SndfileContent> (*i);
454 shared_ptr<AudioDecoder> sd (new SndfileDecoder (_film, sc));
455 sd->Audio.connect (bind (&Player::process_audio, this, piece, _1, _2));
460 _pieces.push_back (piece);
464 cout << "=== Player setup:\n";
465 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
466 cout << *(i->get()) << "\n";
472 Player::content_changed (weak_ptr<Content> w, int property, bool frequent)
474 shared_ptr<Content> c = w.lock ();
480 property == ContentProperty::START || property == ContentProperty::LENGTH ||
481 property == VideoContentProperty::VIDEO_CROP || property == VideoContentProperty::VIDEO_RATIO
484 _have_valid_pieces = false;
487 } else if (property == SubtitleContentProperty::SUBTITLE_OFFSET || property == SubtitleContentProperty::SUBTITLE_SCALE) {
490 } else if (property == VideoContentProperty::VIDEO_FRAME_TYPE) {
496 Player::playlist_changed ()
498 _have_valid_pieces = false;
503 Player::set_video_container_size (libdcp::Size s)
505 _video_container_size = s;
506 _black_frame.reset (new Image (PIX_FMT_RGB24, _video_container_size, true));
507 _black_frame->make_black ();
510 shared_ptr<Resampler>
511 Player::resampler (shared_ptr<AudioContent> c, bool create)
513 map<shared_ptr<AudioContent>, shared_ptr<Resampler> >::iterator i = _resamplers.find (c);
514 if (i != _resamplers.end ()) {
519 return shared_ptr<Resampler> ();
522 shared_ptr<Resampler> r (new Resampler (c->content_audio_frame_rate(), c->output_audio_frame_rate(), c->audio_channels()));
528 Player::emit_black ()
530 #ifdef DCPOMATIC_DEBUG
531 _last_video.reset ();
534 /* XXX: use same here */
535 Video (_black_frame, EYES_BOTH, false, _video_position);
536 _video_position += _film->video_frames_to_time (1);
540 Player::emit_silence (OutputAudioFrame most)
542 OutputAudioFrame N = min (most, _film->audio_frame_rate() / 2);
543 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), N));
544 silence->make_silent ();
545 Audio (silence, _audio_position);
546 _audio_position += _film->audio_frames_to_time (N);
550 Player::film_changed (Film::Property p)
552 /* Here we should notice Film properties that affect our output, and
553 alert listeners that our output now would be different to how it was
554 last time we were run.
557 if (p == Film::SCALER || p == Film::WITH_SUBTITLES || p == Film::CONTAINER) {
563 Player::process_subtitle (weak_ptr<Piece> weak_piece, shared_ptr<Image> image, dcpomatic::Rect<double> rect, Time from, Time to)
565 _in_subtitle.piece = weak_piece;
566 _in_subtitle.image = image;
567 _in_subtitle.rect = rect;
568 _in_subtitle.from = from;
569 _in_subtitle.to = to;
575 Player::update_subtitle ()
577 shared_ptr<Piece> piece = _in_subtitle.piece.lock ();
582 if (!_in_subtitle.image) {
583 _out_subtitle.image.reset ();
587 shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (piece->content);
590 dcpomatic::Rect<double> in_rect = _in_subtitle.rect;
591 libdcp::Size scaled_size;
593 in_rect.y += sc->subtitle_offset ();
595 /* We will scale the subtitle up to fit _video_container_size, and also by the additional subtitle_scale */
596 scaled_size.width = in_rect.width * _video_container_size.width * sc->subtitle_scale ();
597 scaled_size.height = in_rect.height * _video_container_size.height * sc->subtitle_scale ();
599 /* Then we need a corrective translation, consisting of two parts:
601 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
602 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
604 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
605 * (width_before_subtitle_scale * (1 - subtitle_scale) / 2) and
606 * (height_before_subtitle_scale * (1 - subtitle_scale) / 2).
608 * Combining these two translations gives these expressions.
611 _out_subtitle.position.x = rint (_video_container_size.width * (in_rect.x + (in_rect.width * (1 - sc->subtitle_scale ()) / 2)));
612 _out_subtitle.position.y = rint (_video_container_size.height * (in_rect.y + (in_rect.height * (1 - sc->subtitle_scale ()) / 2)));
614 _out_subtitle.image = _in_subtitle.image->scale (libdcp::Size (scaled_size.width, scaled_size.height), Scaler::from_id ("bicubic"), true);
615 _out_subtitle.from = _in_subtitle.from + piece->content->start ();
616 _out_subtitle.to = _in_subtitle.to + piece->content->start ();