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 SimpleImage (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 dcp_mapped->accumulate_channel (audio.get(), i->first, i->second);
279 Time time = content->start() + (frame * TIME_HZ / _film->dcp_audio_frame_rate()) + (content->audio_delay() * TIME_HZ / 1000);
281 /* We must cut off anything that comes before the start of all time */
283 int const frames = - time * _film->dcp_audio_frame_rate() / TIME_HZ;
284 if (frames >= audio->frames ()) {
288 shared_ptr<AudioBuffers> trimmed (new AudioBuffers (audio->channels(), audio->frames() - frames));
289 trimmed->copy_from (audio.get(), audio->frames() - frames, frames, 0);
295 /* The time of this audio may indicate that some of our buffered audio is not going to
296 be added to any more, so it can be emitted.
299 if (time > _audio_position) {
300 /* We can emit some audio from our buffers */
301 OutputAudioFrame const N = _film->time_to_audio_frames (time - _audio_position);
302 if (N > _audio_buffers.frames()) {
303 /* We need some extra silence before whatever is in the buffers */
304 _audio_buffers.ensure_size (N);
305 _audio_buffers.move (0, N - _audio_buffers.frames(), _audio_buffers.frames ());
306 _audio_buffers.make_silent (0, _audio_buffers.frames());
307 _audio_buffers.set_frames (N);
310 if (N > _audio_buffers.frames()) {
311 cout << "N=" << N << ", ab=" << _audio_buffers.frames() << "\n";
313 assert (N <= _audio_buffers.frames());
314 shared_ptr<AudioBuffers> emit (new AudioBuffers (_audio_buffers.channels(), N));
315 emit->copy_from (&_audio_buffers, N, 0, 0);
316 Audio (emit, _audio_position);
317 _audio_position = piece->audio_position = time + _film->audio_frames_to_time (N);
319 /* And remove it from our buffers */
320 if (_audio_buffers.frames() > N) {
321 _audio_buffers.move (N, 0, _audio_buffers.frames() - N);
323 _audio_buffers.set_frames (_audio_buffers.frames() - N);
326 /* Now accumulate the new audio into our buffers */
327 _audio_buffers.ensure_size (_audio_buffers.frames() + audio->frames());
328 _audio_buffers.accumulate_frames (audio.get(), 0, 0, audio->frames ());
329 _audio_buffers.set_frames (_audio_buffers.frames() + audio->frames());
335 if (_audio_buffers.frames() > 0) {
336 shared_ptr<AudioBuffers> emit (new AudioBuffers (_audio_buffers.channels(), _audio_buffers.frames()));
337 emit->copy_from (&_audio_buffers, _audio_buffers.frames(), 0, 0);
338 Audio (emit, _audio_position);
339 _audio_position += _film->audio_frames_to_time (_audio_buffers.frames ());
340 _audio_buffers.set_frames (0);
343 while (_video_position < _audio_position) {
347 while (_audio_position < _video_position) {
348 emit_silence (_film->time_to_audio_frames (_video_position - _audio_position));
353 /** @return true on error */
355 Player::seek (Time t, bool accurate)
357 if (!_have_valid_pieces) {
359 _have_valid_pieces = true;
362 if (_pieces.empty ()) {
366 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
367 shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> ((*i)->content);
372 Time s = t - vc->start ();
373 s = max (static_cast<Time> (0), s);
374 s = min (vc->length(), s);
376 FrameRateConversion frc (vc->video_frame_rate(), _film->dcp_video_frame_rate());
377 VideoContent::Frame f = s * vc->video_frame_rate() / (frc.factor() * TIME_HZ);
378 dynamic_pointer_cast<VideoDecoder>((*i)->decoder)->seek (f, accurate);
381 /* XXX: don't seek audio because we don't need to... */
385 Player::setup_pieces ()
387 list<shared_ptr<Piece> > old_pieces = _pieces;
391 Playlist::ContentList content = _playlist->content ();
392 sort (content.begin(), content.end(), ContentSorter ());
394 for (Playlist::ContentList::iterator i = content.begin(); i != content.end(); ++i) {
396 shared_ptr<Piece> piece (new Piece (*i));
398 /* XXX: into content? */
400 shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (*i);
402 shared_ptr<FFmpegDecoder> fd (new FFmpegDecoder (_film, fc, _video, _audio));
404 fd->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3));
405 fd->Audio.connect (bind (&Player::process_audio, this, piece, _1, _2));
406 fd->Subtitle.connect (bind (&Player::process_subtitle, this, piece, _1, _2, _3, _4));
411 shared_ptr<const ImageMagickContent> ic = dynamic_pointer_cast<const ImageMagickContent> (*i);
413 shared_ptr<ImageMagickDecoder> id;
415 /* See if we can re-use an old ImageMagickDecoder */
416 for (list<shared_ptr<Piece> >::const_iterator j = old_pieces.begin(); j != old_pieces.end(); ++j) {
417 shared_ptr<ImageMagickDecoder> imd = dynamic_pointer_cast<ImageMagickDecoder> ((*j)->decoder);
418 if (imd && imd->content() == ic) {
424 id.reset (new ImageMagickDecoder (_film, ic));
425 id->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3));
431 shared_ptr<const SndfileContent> sc = dynamic_pointer_cast<const SndfileContent> (*i);
433 shared_ptr<AudioDecoder> sd (new SndfileDecoder (_film, sc));
434 sd->Audio.connect (bind (&Player::process_audio, this, piece, _1, _2));
439 _pieces.push_back (piece);
443 cout << "=== Player setup:\n";
444 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
445 cout << *(i->get()) << "\n";
451 Player::content_changed (weak_ptr<Content> w, int p)
453 shared_ptr<Content> c = w.lock ();
459 p == ContentProperty::START || p == ContentProperty::LENGTH ||
460 p == VideoContentProperty::VIDEO_CROP || p == VideoContentProperty::VIDEO_RATIO
463 _have_valid_pieces = false;
466 } else if (p == SubtitleContentProperty::SUBTITLE_OFFSET || p == SubtitleContentProperty::SUBTITLE_SCALE) {
473 Player::playlist_changed ()
475 _have_valid_pieces = false;
480 Player::set_video_container_size (libdcp::Size s)
482 _video_container_size = s;
483 _black_frame.reset (new SimpleImage (PIX_FMT_RGB24, _video_container_size, true));
484 _black_frame->make_black ();
487 shared_ptr<Resampler>
488 Player::resampler (shared_ptr<AudioContent> c)
490 map<shared_ptr<AudioContent>, shared_ptr<Resampler> >::iterator i = _resamplers.find (c);
491 if (i != _resamplers.end ()) {
495 shared_ptr<Resampler> r (new Resampler (c->content_audio_frame_rate(), c->output_audio_frame_rate(), c->audio_channels()));
501 Player::emit_black ()
503 /* XXX: use same here */
504 Video (_black_frame, false, _video_position);
505 _video_position += _film->video_frames_to_time (1);
509 Player::emit_silence (OutputAudioFrame most)
511 OutputAudioFrame N = min (most, _film->dcp_audio_frame_rate() / 2);
512 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->dcp_audio_channels(), N));
513 silence->make_silent ();
514 Audio (silence, _audio_position);
515 _audio_position += _film->audio_frames_to_time (N);
519 Player::film_changed (Film::Property p)
521 /* Here we should notice Film properties that affect our output, and
522 alert listeners that our output now would be different to how it was
523 last time we were run.
526 if (p == Film::SCALER || p == Film::WITH_SUBTITLES || p == Film::CONTAINER) {
532 Player::process_subtitle (weak_ptr<Piece> weak_piece, shared_ptr<Image> image, dcpomatic::Rect<double> rect, Time from, Time to)
534 _in_subtitle.piece = weak_piece;
535 _in_subtitle.image = image;
536 _in_subtitle.rect = rect;
537 _in_subtitle.from = from;
538 _in_subtitle.to = to;
544 Player::update_subtitle ()
546 shared_ptr<Piece> piece = _in_subtitle.piece.lock ();
551 if (!_in_subtitle.image) {
552 _out_subtitle.image.reset ();
556 shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (piece->content);
559 dcpomatic::Rect<double> in_rect = _in_subtitle.rect;
560 libdcp::Size scaled_size;
562 in_rect.y += sc->subtitle_offset ();
564 /* We will scale the subtitle up to fit _video_container_size, and also by the additional subtitle_scale */
565 scaled_size.width = in_rect.width * _video_container_size.width * sc->subtitle_scale ();
566 scaled_size.height = in_rect.height * _video_container_size.height * sc->subtitle_scale ();
568 /* Then we need a corrective translation, consisting of two parts:
570 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
571 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
573 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
574 * (width_before_subtitle_scale * (1 - subtitle_scale) / 2) and
575 * (height_before_subtitle_scale * (1 - subtitle_scale) / 2).
577 * Combining these two translations gives these expressions.
580 _out_subtitle.position.x = rint (_video_container_size.width * (in_rect.x + (in_rect.width * (1 - sc->subtitle_scale ()) / 2)));
581 _out_subtitle.position.y = rint (_video_container_size.height * (in_rect.y + (in_rect.height * (1 - sc->subtitle_scale ()) / 2)));
583 _out_subtitle.image = _in_subtitle.image->scale (libdcp::Size (scaled_size.width, scaled_size.height), Scaler::from_id ("bicubic"), true);
584 _out_subtitle.from = _in_subtitle.from + piece->content->start ();
585 _out_subtitle.to = _in_subtitle.to + piece->content->start ();