2 Copyright (C) 2014-2020 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #include "dcp_decoder.h"
22 #include "dcp_content.h"
23 #include "audio_content.h"
24 #include "video_decoder.h"
25 #include "audio_decoder.h"
26 #include "j2k_image_proxy.h"
27 #include "text_decoder.h"
28 #include "ffmpeg_image_proxy.h"
31 #include "frame_interval_checker.h"
35 #include <dcp/mono_picture_asset.h>
36 #include <dcp/mono_picture_asset_reader.h>
37 #include <dcp/stereo_picture_asset.h>
38 #include <dcp/stereo_picture_asset_reader.h>
39 #include <dcp/reel_picture_asset.h>
40 #include <dcp/reel_sound_asset.h>
41 #include <dcp/reel_subtitle_asset.h>
42 #include <dcp/reel_closed_caption_asset.h>
43 #include <dcp/mono_picture_frame.h>
44 #include <dcp/stereo_picture_frame.h>
45 #include <dcp/sound_frame.h>
46 #include <dcp/sound_asset_reader.h>
47 #include <dcp/subtitle_image.h>
48 #include <boost/foreach.hpp>
55 using boost::shared_ptr;
56 using boost::dynamic_pointer_cast;
57 using boost::optional;
59 DCPDecoder::DCPDecoder (shared_ptr<const Film> film, shared_ptr<const DCPContent> c, bool fast)
62 , _decode_referenced (false)
64 if (c->can_be_played()) {
66 video.reset (new VideoDecoder (this, c));
69 audio.reset (new AudioDecoder (this, c->audio, fast));
71 BOOST_FOREACH (shared_ptr<TextContent> i, c->text) {
72 /* XXX: this time here should be the time of the first subtitle, not 0 */
73 text.push_back (shared_ptr<TextDecoder> (new TextDecoder (this, i, ContentTime())));
77 list<shared_ptr<dcp::CPL> > cpl_list = cpls ();
79 if (cpl_list.empty()) {
80 throw DCPError (_("No CPLs found in DCP."));
83 shared_ptr<dcp::CPL> cpl;
84 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpl_list) {
85 if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) {
91 /* No CPL found; probably an old file that doesn't specify it;
92 just use the first one.
94 cpl = cpls().front ();
97 set_decode_referenced (false);
99 _reels = cpl->reels ();
101 _reel = _reels.begin ();
110 if (!_dcp_content->can_be_played()) {
114 if (_reel == _reels.end()) {
121 double const vfr = _dcp_content->active_video_frame_rate (film());
123 /* Frame within the (played part of the) reel that is coming up next */
124 int64_t const frame = _next.frames_round (vfr);
126 shared_ptr<dcp::PictureAsset> picture_asset = (*_reel)->main_picture()->asset();
127 DCPOMATIC_ASSERT (picture_asset);
129 /* We must emit texts first as when we emit the video for this frame
130 it will expect already to have the texts.
132 pass_texts (_next, picture_asset->size());
134 if ((_mono_reader || _stereo_reader) && (_decode_referenced || !_dcp_content->reference_video())) {
135 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
139 shared_ptr<ImageProxy> (
141 _mono_reader->get_frame (entry_point + frame),
142 picture_asset->size(),
152 shared_ptr<ImageProxy> (
154 _stereo_reader->get_frame (entry_point + frame),
155 picture_asset->size(),
166 shared_ptr<ImageProxy> (
168 _stereo_reader->get_frame (entry_point + frame),
169 picture_asset->size(),
180 if (_sound_reader && (_decode_referenced || !_dcp_content->reference_audio())) {
181 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
182 shared_ptr<const dcp::SoundFrame> sf = _sound_reader->get_frame (entry_point + frame);
183 uint8_t const * from = sf->data ();
185 int const channels = _dcp_content->audio->stream()->channels ();
186 int const frames = sf->size() / (3 * channels);
187 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
188 float** data_data = data->data();
189 for (int i = 0; i < frames; ++i) {
190 for (int j = 0; j < channels; ++j) {
191 data_data[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
196 audio->emit (film(), _dcp_content->audio->stream(), data, ContentTime::from_frames (_offset, vfr) + _next);
199 _next += ContentTime::from_frames (1, vfr);
201 if ((*_reel)->main_picture ()) {
202 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
204 _next = ContentTime ();
212 DCPDecoder::pass_texts (ContentTime next, dcp::Size size)
214 list<shared_ptr<TextDecoder> >::const_iterator decoder = text.begin ();
215 if (decoder == text.end()) {
216 /* It's possible that there is now a main subtitle but no TextDecoders, for example if
217 the CPL has just changed but the TextContent's texts have not been recreated yet.
222 if ((*_reel)->main_subtitle()) {
225 (*_reel)->main_subtitle()->asset(),
226 _dcp_content->reference_text(TEXT_OPEN_SUBTITLE),
227 (*_reel)->main_subtitle()->entry_point(),
234 BOOST_FOREACH (shared_ptr<dcp::ReelClosedCaptionAsset> i, (*_reel)->closed_captions()) {
236 next, i->asset(), _dcp_content->reference_text(TEXT_CLOSED_CAPTION), i->entry_point(), *decoder, size
243 DCPDecoder::pass_texts (
244 ContentTime next, shared_ptr<dcp::SubtitleAsset> asset, bool reference, int64_t entry_point, shared_ptr<TextDecoder> decoder, dcp::Size size
247 double const vfr = _dcp_content->active_video_frame_rate (film());
248 /* Frame within the (played part of the) reel that is coming up next */
249 int64_t const frame = next.frames_round (vfr);
251 if (_decode_referenced || !reference) {
252 list<shared_ptr<dcp::Subtitle> > subs = asset->subtitles_during (
253 dcp::Time (entry_point + frame, vfr, vfr),
254 dcp::Time (entry_point + frame + 1, vfr, vfr),
258 list<dcp::SubtitleString> strings;
260 BOOST_FOREACH (shared_ptr<dcp::Subtitle> i, subs) {
261 shared_ptr<dcp::SubtitleString> is = dynamic_pointer_cast<dcp::SubtitleString> (i);
263 if (!strings.empty() && (strings.back().in() != is->in() || strings.back().out() != is->out())) {
264 dcp::SubtitleString b = strings.back();
265 decoder->emit_plain (
267 ContentTime::from_frames(_offset - entry_point, vfr) + ContentTime::from_seconds(b.in().as_seconds()),
268 ContentTime::from_frames(_offset - entry_point, vfr) + ContentTime::from_seconds(b.out().as_seconds())
275 strings.push_back (*is);
278 /* XXX: perhaps these image subs should also be collected together like the string ones are;
279 this would need to be done both here and in DCPSubtitleDecoder.
282 shared_ptr<dcp::SubtitleImage> ii = dynamic_pointer_cast<dcp::SubtitleImage> (i);
284 emit_subtitle_image (
286 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i->in().as_seconds ()),
287 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i->out().as_seconds ())
296 if (!strings.empty()) {
297 dcp::SubtitleString b = strings.back();
298 decoder->emit_plain (
300 ContentTime::from_frames(_offset - entry_point, vfr) + ContentTime::from_seconds(b.in().as_seconds()),
301 ContentTime::from_frames(_offset - entry_point, vfr) + ContentTime::from_seconds(b.out().as_seconds())
311 DCPDecoder::next_reel ()
313 _offset += (*_reel)->main_picture()->duration();
319 DCPDecoder::get_readers ()
321 if (_reel == _reels.end() || !_dcp_content->can_be_played ()) {
322 _mono_reader.reset ();
323 _stereo_reader.reset ();
324 _sound_reader.reset ();
328 if ((*_reel)->main_picture()) {
329 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
330 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
331 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
332 DCPOMATIC_ASSERT (mono || stereo);
334 _mono_reader = mono->start_read ();
335 _stereo_reader.reset ();
337 _stereo_reader = stereo->start_read ();
338 _mono_reader.reset ();
341 _mono_reader.reset ();
342 _stereo_reader.reset ();
345 if ((*_reel)->main_sound()) {
346 _sound_reader = (*_reel)->main_sound()->asset()->start_read ();
348 _sound_reader.reset ();
353 DCPDecoder::seek (ContentTime t, bool accurate)
355 if (!_dcp_content->can_be_played ()) {
359 Decoder::seek (t, accurate);
361 _reel = _reels.begin ();
365 int const pre_roll_seconds = 2;
367 /* Pre-roll for subs */
369 ContentTime pre = t - ContentTime::from_seconds (pre_roll_seconds);
370 if (pre < ContentTime()) {
371 pre = ContentTime ();
374 /* Seek to pre-roll position */
376 while (_reel != _reels.end() && pre >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate(film()))) {
377 ContentTime rd = ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate(film()));
383 /* Pass texts in the pre-roll */
385 double const vfr = _dcp_content->active_video_frame_rate (film());
386 for (int i = 0; i < pre_roll_seconds * vfr; ++i) {
387 pass_texts (pre, (*_reel)->main_picture()->asset()->size());
388 pre += ContentTime::from_frames (1, vfr);
391 /* Seek to correct position */
393 while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate(film()))) {
394 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate(film()));
402 DCPDecoder::set_decode_referenced (bool r)
404 _decode_referenced = r;
407 video->set_ignore (_dcp_content->reference_video() && !_decode_referenced);
410 audio->set_ignore (_dcp_content->reference_audio() && !_decode_referenced);
415 DCPDecoder::set_forced_reduction (optional<int> reduction)
417 _forced_reduction = reduction;
421 DCPDecoder::position () const
423 return ContentTime::from_frames(_offset, _dcp_content->active_video_frame_rate(film())) + _next;