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 "imagemagick_decoder.h"
26 #include "imagemagick_content.h"
27 #include "sndfile_decoder.h"
28 #include "sndfile_content.h"
29 #include "subtitle_content.h"
34 #include "resampler.h"
44 using boost::shared_ptr;
45 using boost::weak_ptr;
46 using boost::dynamic_pointer_cast;
48 //#define DEBUG_PLAYER 1
53 Piece (shared_ptr<Content> c)
55 , video_position (c->start ())
56 , audio_position (c->start ())
59 Piece (shared_ptr<Content> c, shared_ptr<Decoder> d)
62 , video_position (c->start ())
63 , audio_position (c->start ())
66 shared_ptr<Content> content;
67 shared_ptr<Decoder> decoder;
73 std::ostream& operator<<(std::ostream& s, Piece const & p)
75 if (dynamic_pointer_cast<FFmpegContent> (p.content)) {
77 } else if (dynamic_pointer_cast<ImageMagickContent> (p.content)) {
79 } else if (dynamic_pointer_cast<SndfileContent> (p.content)) {
83 s << " at " << p.content->start() << " until " << p.content->end();
89 Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
94 , _have_valid_pieces (false)
97 , _audio_buffers (f->dcp_audio_channels(), 0)
99 _playlist->Changed.connect (bind (&Player::playlist_changed, this));
100 _playlist->ContentChanged.connect (bind (&Player::content_changed, this, _1, _2));
101 _film->Changed.connect (bind (&Player::film_changed, this, _1));
102 set_video_container_size (_film->container()->size (_film->full_frame ()));
106 Player::disable_video ()
112 Player::disable_audio ()
120 if (!_have_valid_pieces) {
122 _have_valid_pieces = true;
129 Time earliest_t = TIME_MAX;
130 shared_ptr<Piece> earliest;
136 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
137 if ((*i)->decoder->done ()) {
141 if (dynamic_pointer_cast<VideoDecoder> ((*i)->decoder)) {
142 if ((*i)->video_position < earliest_t) {
143 earliest_t = (*i)->video_position;
149 if (dynamic_pointer_cast<AudioDecoder> ((*i)->decoder)) {
150 if ((*i)->audio_position < earliest_t) {
151 earliest_t = (*i)->audio_position;
160 cout << "no earliest piece.\n";
169 if (earliest_t > _video_position) {
171 cout << "no video here; emitting black frame.\n";
176 cout << "Pass " << *earliest << "\n";
178 earliest->decoder->pass ();
183 if (earliest_t > _audio_position) {
185 cout << "no audio here; emitting silence.\n";
187 emit_silence (_film->time_to_audio_frames (earliest_t - _audio_position));
190 cout << "Pass " << *earliest << "\n";
192 earliest->decoder->pass ();
198 cout << "\tpost pass " << _video_position << " " << _audio_position << "\n";
205 Player::process_video (weak_ptr<Piece> weak_piece, shared_ptr<const Image> image, bool same, VideoContent::Frame frame)
207 shared_ptr<Piece> piece = weak_piece.lock ();
212 shared_ptr<VideoContent> content = dynamic_pointer_cast<VideoContent> (piece->content);
215 FrameRateConversion frc (content->video_frame_rate(), _film->dcp_video_frame_rate());
216 if (frc.skip && (frame % 2) == 1) {
220 shared_ptr<Image> work_image = image->crop (content->crop(), true);
222 libdcp::Size const image_size = content->ratio()->size (_video_container_size);
224 work_image = work_image->scale_and_convert_to_rgb (image_size, _film->scaler(), true);
226 Time time = content->start() + (frame * frc.factor() * TIME_HZ / _film->dcp_video_frame_rate());
228 if (_film->with_subtitles () && _out_subtitle.image && time >= _out_subtitle.from && time <= _out_subtitle.to) {
229 work_image->alpha_blend (_out_subtitle.image, _out_subtitle.position);
232 if (image_size != _video_container_size) {
233 assert (image_size.width <= _video_container_size.width);
234 assert (image_size.height <= _video_container_size.height);
235 shared_ptr<Image> im (new Image (PIX_FMT_RGB24, _video_container_size, true));
237 im->copy (work_image, Position<int> ((_video_container_size.width - image_size.width) / 2, (_video_container_size.height - image_size.height) / 2));
241 Video (work_image, same, time);
242 time += TIME_HZ / _film->dcp_video_frame_rate();
245 Video (work_image, true, time);
246 time += TIME_HZ / _film->dcp_video_frame_rate();
249 _video_position = piece->video_position = time;
253 Player::process_audio (weak_ptr<Piece> weak_piece, shared_ptr<const AudioBuffers> audio, AudioContent::Frame frame)
255 shared_ptr<Piece> piece = weak_piece.lock ();
260 shared_ptr<AudioContent> content = dynamic_pointer_cast<AudioContent> (piece->content);
264 if (content->content_audio_frame_rate() != content->output_audio_frame_rate()) {
265 shared_ptr<Resampler> r = resampler (content);
266 audio = r->run (audio);
270 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->dcp_audio_channels(), audio->frames()));
271 dcp_mapped->make_silent ();
272 list<pair<int, libdcp::Channel> > map = content->audio_mapping().content_to_dcp ();
273 for (list<pair<int, libdcp::Channel> >::iterator i = map.begin(); i != map.end(); ++i) {
274 if (i->first < audio->channels() && i->second < dcp_mapped->channels()) {
275 dcp_mapped->accumulate_channel (audio.get(), i->first, i->second);
281 Time time = content->start() + (frame * TIME_HZ / _film->dcp_audio_frame_rate()) + (content->audio_delay() * TIME_HZ / 1000);
283 /* We must cut off anything that comes before the start of all time */
285 int const frames = - time * _film->dcp_audio_frame_rate() / TIME_HZ;
286 if (frames >= audio->frames ()) {
290 shared_ptr<AudioBuffers> trimmed (new AudioBuffers (audio->channels(), audio->frames() - frames));
291 trimmed->copy_from (audio.get(), audio->frames() - frames, frames, 0);
297 /* The time of this audio may indicate that some of our buffered audio is not going to
298 be added to any more, so it can be emitted.
301 if (time > _audio_position) {
302 /* We can emit some audio from our buffers */
303 OutputAudioFrame const N = _film->time_to_audio_frames (time - _audio_position);
304 if (N > _audio_buffers.frames()) {
305 /* We need some extra silence before whatever is in the buffers */
306 _audio_buffers.ensure_size (N);
307 _audio_buffers.move (0, N - _audio_buffers.frames(), _audio_buffers.frames ());
308 _audio_buffers.make_silent (0, _audio_buffers.frames());
309 _audio_buffers.set_frames (N);
312 if (N > _audio_buffers.frames()) {
313 cout << "N=" << N << ", ab=" << _audio_buffers.frames() << "\n";
315 assert (N <= _audio_buffers.frames());
316 shared_ptr<AudioBuffers> emit (new AudioBuffers (_audio_buffers.channels(), N));
317 emit->copy_from (&_audio_buffers, N, 0, 0);
318 Audio (emit, _audio_position);
319 _audio_position = piece->audio_position = time + _film->audio_frames_to_time (N);
321 /* And remove it from our buffers */
322 if (_audio_buffers.frames() > N) {
323 _audio_buffers.move (N, 0, _audio_buffers.frames() - N);
325 _audio_buffers.set_frames (_audio_buffers.frames() - N);
328 /* Now accumulate the new audio into our buffers */
329 _audio_buffers.ensure_size (_audio_buffers.frames() + audio->frames());
330 _audio_buffers.accumulate_frames (audio.get(), 0, 0, audio->frames ());
331 _audio_buffers.set_frames (_audio_buffers.frames() + audio->frames());
337 if (_audio_buffers.frames() > 0) {
338 shared_ptr<AudioBuffers> emit (new AudioBuffers (_audio_buffers.channels(), _audio_buffers.frames()));
339 emit->copy_from (&_audio_buffers, _audio_buffers.frames(), 0, 0);
340 Audio (emit, _audio_position);
341 _audio_position += _film->audio_frames_to_time (_audio_buffers.frames ());
342 _audio_buffers.set_frames (0);
345 while (_video_position < _audio_position) {
349 while (_audio_position < _video_position) {
350 emit_silence (_film->time_to_audio_frames (_video_position - _audio_position));
355 /** @return true on error */
357 Player::seek (Time t, bool accurate)
359 if (!_have_valid_pieces) {
361 _have_valid_pieces = true;
364 if (_pieces.empty ()) {
368 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
369 shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> ((*i)->content);
374 Time s = t - vc->start ();
375 s = max (static_cast<Time> (0), s);
376 s = min (vc->length(), s);
378 FrameRateConversion frc (vc->video_frame_rate(), _film->dcp_video_frame_rate());
379 VideoContent::Frame f = s * vc->video_frame_rate() / (frc.factor() * TIME_HZ);
380 dynamic_pointer_cast<VideoDecoder>((*i)->decoder)->seek (f, accurate);
383 /* XXX: don't seek audio because we don't need to... */
387 Player::setup_pieces ()
389 list<shared_ptr<Piece> > old_pieces = _pieces;
393 Playlist::ContentList content = _playlist->content ();
394 sort (content.begin(), content.end(), ContentSorter ());
396 for (Playlist::ContentList::iterator i = content.begin(); i != content.end(); ++i) {
398 shared_ptr<Piece> piece (new Piece (*i));
400 /* XXX: into content? */
402 shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (*i);
404 shared_ptr<FFmpegDecoder> fd (new FFmpegDecoder (_film, fc, _video, _audio));
406 fd->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3));
407 fd->Audio.connect (bind (&Player::process_audio, this, piece, _1, _2));
408 fd->Subtitle.connect (bind (&Player::process_subtitle, this, piece, _1, _2, _3, _4));
413 shared_ptr<const ImageMagickContent> ic = dynamic_pointer_cast<const ImageMagickContent> (*i);
415 shared_ptr<ImageMagickDecoder> id;
417 /* See if we can re-use an old ImageMagickDecoder */
418 for (list<shared_ptr<Piece> >::const_iterator j = old_pieces.begin(); j != old_pieces.end(); ++j) {
419 shared_ptr<ImageMagickDecoder> imd = dynamic_pointer_cast<ImageMagickDecoder> ((*j)->decoder);
420 if (imd && imd->content() == ic) {
426 id.reset (new ImageMagickDecoder (_film, ic));
427 id->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3));
433 shared_ptr<const SndfileContent> sc = dynamic_pointer_cast<const SndfileContent> (*i);
435 shared_ptr<AudioDecoder> sd (new SndfileDecoder (_film, sc));
436 sd->Audio.connect (bind (&Player::process_audio, this, piece, _1, _2));
441 _pieces.push_back (piece);
445 cout << "=== Player setup:\n";
446 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
447 cout << *(i->get()) << "\n";
453 Player::content_changed (weak_ptr<Content> w, int p)
455 shared_ptr<Content> c = w.lock ();
461 p == ContentProperty::START || p == ContentProperty::LENGTH ||
462 p == VideoContentProperty::VIDEO_CROP || p == VideoContentProperty::VIDEO_RATIO
465 _have_valid_pieces = false;
468 } else if (p == SubtitleContentProperty::SUBTITLE_OFFSET || p == SubtitleContentProperty::SUBTITLE_SCALE) {
475 Player::playlist_changed ()
477 _have_valid_pieces = false;
482 Player::set_video_container_size (libdcp::Size s)
484 _video_container_size = s;
485 _black_frame.reset (new Image (PIX_FMT_RGB24, _video_container_size, true));
486 _black_frame->make_black ();
489 shared_ptr<Resampler>
490 Player::resampler (shared_ptr<AudioContent> c)
492 map<shared_ptr<AudioContent>, shared_ptr<Resampler> >::iterator i = _resamplers.find (c);
493 if (i != _resamplers.end ()) {
497 shared_ptr<Resampler> r (new Resampler (c->content_audio_frame_rate(), c->output_audio_frame_rate(), c->audio_channels()));
503 Player::emit_black ()
505 /* XXX: use same here */
506 Video (_black_frame, false, _video_position);
507 _video_position += _film->video_frames_to_time (1);
511 Player::emit_silence (OutputAudioFrame most)
513 OutputAudioFrame N = min (most, _film->dcp_audio_frame_rate() / 2);
514 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->dcp_audio_channels(), N));
515 silence->make_silent ();
516 Audio (silence, _audio_position);
517 _audio_position += _film->audio_frames_to_time (N);
521 Player::film_changed (Film::Property p)
523 /* Here we should notice Film properties that affect our output, and
524 alert listeners that our output now would be different to how it was
525 last time we were run.
528 if (p == Film::SCALER || p == Film::WITH_SUBTITLES || p == Film::CONTAINER) {
534 Player::process_subtitle (weak_ptr<Piece> weak_piece, shared_ptr<Image> image, dcpomatic::Rect<double> rect, Time from, Time to)
536 _in_subtitle.piece = weak_piece;
537 _in_subtitle.image = image;
538 _in_subtitle.rect = rect;
539 _in_subtitle.from = from;
540 _in_subtitle.to = to;
546 Player::update_subtitle ()
548 shared_ptr<Piece> piece = _in_subtitle.piece.lock ();
553 if (!_in_subtitle.image) {
554 _out_subtitle.image.reset ();
558 shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (piece->content);
561 dcpomatic::Rect<double> in_rect = _in_subtitle.rect;
562 libdcp::Size scaled_size;
564 in_rect.y += sc->subtitle_offset ();
566 /* We will scale the subtitle up to fit _video_container_size, and also by the additional subtitle_scale */
567 scaled_size.width = in_rect.width * _video_container_size.width * sc->subtitle_scale ();
568 scaled_size.height = in_rect.height * _video_container_size.height * sc->subtitle_scale ();
570 /* Then we need a corrective translation, consisting of two parts:
572 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
573 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
575 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
576 * (width_before_subtitle_scale * (1 - subtitle_scale) / 2) and
577 * (height_before_subtitle_scale * (1 - subtitle_scale) / 2).
579 * Combining these two translations gives these expressions.
582 _out_subtitle.position.x = rint (_video_container_size.width * (in_rect.x + (in_rect.width * (1 - sc->subtitle_scale ()) / 2)));
583 _out_subtitle.position.y = rint (_video_container_size.height * (in_rect.y + (in_rect.height * (1 - sc->subtitle_scale ()) / 2)));
585 _out_subtitle.image = _in_subtitle.image->scale (libdcp::Size (scaled_size.width, scaled_size.height), Scaler::from_id ("bicubic"), true);
586 _out_subtitle.from = _in_subtitle.from + piece->content->start ();
587 _out_subtitle.to = _in_subtitle.to + piece->content->start ();