2 Copyright (C) 2014-2019 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"
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 <dcp/decrypted_kdm.h>
49 #include <boost/foreach.hpp>
57 using boost::shared_ptr;
58 using boost::dynamic_pointer_cast;
59 using boost::optional;
60 using namespace dcpomatic;
62 DCPDecoder::DCPDecoder (shared_ptr<const Film> film, shared_ptr<const DCPContent> c, bool fast, bool tolerant, shared_ptr<DCPDecoder> old)
65 , _decode_referenced (false)
67 if (c->can_be_played()) {
69 video.reset (new VideoDecoder (this, c));
72 audio.reset (new AudioDecoder (this, c->audio, fast));
74 BOOST_FOREACH (shared_ptr<TextContent> i, c->text) {
75 /* XXX: this time here should be the time of the first subtitle, not 0 */
76 text.push_back (shared_ptr<TextDecoder> (new TextDecoder (this, i, ContentTime())));
80 /* We try to avoid re-scanning the DCP's files every time we make a new DCPDecoder; we do this
81 by re-using the _reels list. Before we do this we need to check that nothing too serious
82 has changed in the DCPContent.
84 We do this by storing a digest of the important bits of the DCPContent and then checking that's
85 the same before we re-use _reels.
88 _lazy_digest = calculate_lazy_digest (c);
90 if (old && old->lazy_digest() == _lazy_digest) {
94 list<shared_ptr<dcp::CPL> > cpl_list = cpls ();
96 if (cpl_list.empty()) {
97 throw DCPError (_("No CPLs found in DCP."));
100 shared_ptr<dcp::CPL> cpl;
101 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpl_list) {
102 if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) {
108 /* No CPL found; probably an old file that doesn't specify it;
109 just use the first one.
111 cpl = cpls().front ();
114 _reels = cpl->reels ();
117 set_decode_referenced (false);
119 _reel = _reels.begin ();
128 if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
132 double const vfr = _dcp_content->active_video_frame_rate (film());
134 /* Frame within the (played part of the) reel that is coming up next */
135 int64_t const frame = _next.frames_round (vfr);
137 shared_ptr<dcp::PictureAsset> picture_asset = (*_reel)->main_picture()->asset();
138 DCPOMATIC_ASSERT (picture_asset);
140 /* We must emit texts first as when we emit the video for this frame
141 it will expect already to have the texts.
143 pass_texts (_next, picture_asset->size());
145 if ((_mono_reader || _stereo_reader) && (_decode_referenced || !_dcp_content->reference_video())) {
146 int64_t const entry_point = (*_reel)->main_picture()->entry_point().get_value_or(0);
150 shared_ptr<ImageProxy> (
152 _mono_reader->get_frame (entry_point + frame),
153 picture_asset->size(),
163 shared_ptr<ImageProxy> (
165 _stereo_reader->get_frame (entry_point + frame),
166 picture_asset->size(),
177 shared_ptr<ImageProxy> (
179 _stereo_reader->get_frame (entry_point + frame),
180 picture_asset->size(),
191 if (_sound_reader && (_decode_referenced || !_dcp_content->reference_audio())) {
192 int64_t const entry_point = (*_reel)->main_sound()->entry_point().get_value_or(0);
193 shared_ptr<const dcp::SoundFrame> sf = _sound_reader->get_frame (entry_point + frame);
194 uint8_t const * from = sf->data ();
196 int const channels = _dcp_content->audio->stream()->channels ();
197 int const frames = sf->size() / (3 * channels);
198 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
199 float** data_data = data->data();
200 for (int i = 0; i < frames; ++i) {
201 for (int j = 0; j < channels; ++j) {
202 data_data[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
207 audio->emit (film(), _dcp_content->audio->stream(), data, ContentTime::from_frames (_offset, vfr) + _next);
210 _next += ContentTime::from_frames (1, vfr);
212 if ((*_reel)->main_picture ()) {
213 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
215 _next = ContentTime ();
223 DCPDecoder::pass_texts (ContentTime next, dcp::Size size)
225 list<shared_ptr<TextDecoder> >::const_iterator decoder = text.begin ();
226 if (decoder == text.end()) {
227 /* It's possible that there is now a main subtitle but no TextDecoders, for example if
228 the CPL has just changed but the TextContent's texts have not been recreated yet.
233 if ((*_reel)->main_subtitle()) {
236 (*_reel)->main_subtitle()->asset(),
237 _dcp_content->reference_text(TEXT_OPEN_SUBTITLE),
238 (*_reel)->main_subtitle()->entry_point().get_value_or(0),
245 BOOST_FOREACH (shared_ptr<dcp::ReelClosedCaptionAsset> i, (*_reel)->closed_captions()) {
247 next, i->asset(), _dcp_content->reference_text(TEXT_CLOSED_CAPTION), i->entry_point().get_value_or(0), *decoder, size
254 DCPDecoder::pass_texts (
255 ContentTime next, shared_ptr<dcp::SubtitleAsset> asset, bool reference, int64_t entry_point, shared_ptr<TextDecoder> decoder, dcp::Size size
258 double const vfr = _dcp_content->active_video_frame_rate (film());
259 /* Frame within the (played part of the) reel that is coming up next */
260 int64_t const frame = next.frames_round (vfr);
262 if (_decode_referenced || !reference) {
263 list<shared_ptr<dcp::Subtitle> > subs = asset->subtitles_during (
264 dcp::Time (entry_point + frame, vfr, vfr),
265 dcp::Time (entry_point + frame + 1, vfr, vfr),
269 list<dcp::SubtitleString> strings;
271 BOOST_FOREACH (shared_ptr<dcp::Subtitle> i, subs) {
272 shared_ptr<dcp::SubtitleString> is = dynamic_pointer_cast<dcp::SubtitleString> (i);
274 if (!strings.empty() && (strings.back().in() != is->in() || strings.back().out() != is->out())) {
275 dcp::SubtitleString b = strings.back();
276 decoder->emit_plain (
278 ContentTime::from_frames(_offset - entry_point, vfr) + ContentTime::from_seconds(b.in().as_seconds()),
279 ContentTime::from_frames(_offset - entry_point, vfr) + ContentTime::from_seconds(b.out().as_seconds())
286 strings.push_back (*is);
289 /* XXX: perhaps these image subs should also be collected together like the string ones are;
290 this would need to be done both here and in DCPSubtitleDecoder.
293 shared_ptr<dcp::SubtitleImage> ii = dynamic_pointer_cast<dcp::SubtitleImage> (i);
295 emit_subtitle_image (
297 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i->in().as_seconds ()),
298 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i->out().as_seconds ())
307 if (!strings.empty()) {
308 dcp::SubtitleString b = strings.back();
309 decoder->emit_plain (
311 ContentTime::from_frames(_offset - entry_point, vfr) + ContentTime::from_seconds(b.in().as_seconds()),
312 ContentTime::from_frames(_offset - entry_point, vfr) + ContentTime::from_seconds(b.out().as_seconds())
322 DCPDecoder::next_reel ()
324 _offset += (*_reel)->main_picture()->actual_duration();
330 DCPDecoder::get_readers ()
332 if (_reel == _reels.end() || !_dcp_content->can_be_played ()) {
333 _mono_reader.reset ();
334 _stereo_reader.reset ();
335 _sound_reader.reset ();
339 if ((*_reel)->main_picture()) {
340 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
341 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
342 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
343 DCPOMATIC_ASSERT (mono || stereo);
345 _mono_reader = mono->start_read ();
346 _stereo_reader.reset ();
348 _stereo_reader = stereo->start_read ();
349 _mono_reader.reset ();
352 _mono_reader.reset ();
353 _stereo_reader.reset ();
356 if ((*_reel)->main_sound()) {
357 _sound_reader = (*_reel)->main_sound()->asset()->start_read ();
359 _sound_reader.reset ();
364 DCPDecoder::seek (ContentTime t, bool accurate)
366 if (!_dcp_content->can_be_played ()) {
370 Decoder::seek (t, accurate);
372 _reel = _reels.begin ();
376 int const pre_roll_seconds = 2;
378 /* Pre-roll for subs */
380 ContentTime pre = t - ContentTime::from_seconds (pre_roll_seconds);
381 if (pre < ContentTime()) {
382 pre = ContentTime ();
385 /* Seek to pre-roll position */
388 _reel != _reels.end() &&
389 pre >= ContentTime::from_frames ((*_reel)->main_picture()->actual_duration(), _dcp_content->active_video_frame_rate(film()))
392 ContentTime rd = ContentTime::from_frames ((*_reel)->main_picture()->actual_duration(), _dcp_content->active_video_frame_rate(film()));
398 /* Pass texts in the pre-roll */
400 double const vfr = _dcp_content->active_video_frame_rate (film());
401 for (int i = 0; i < pre_roll_seconds * vfr; ++i) {
402 pass_texts (pre, (*_reel)->main_picture()->asset()->size());
403 pre += ContentTime::from_frames (1, vfr);
406 /* Seek to correct position */
409 _reel != _reels.end() &&
410 t >= ContentTime::from_frames ((*_reel)->main_picture()->actual_duration(), _dcp_content->active_video_frame_rate(film()))
413 t -= ContentTime::from_frames ((*_reel)->main_picture()->actual_duration(), _dcp_content->active_video_frame_rate(film()));
421 DCPDecoder::set_decode_referenced (bool r)
423 _decode_referenced = r;
426 video->set_ignore (_dcp_content->reference_video() && !_decode_referenced);
429 audio->set_ignore (_dcp_content->reference_audio() && !_decode_referenced);
434 DCPDecoder::set_forced_reduction (optional<int> reduction)
436 _forced_reduction = reduction;
440 DCPDecoder::calculate_lazy_digest (shared_ptr<const DCPContent> c) const
443 BOOST_FOREACH (boost::filesystem::path i, c->paths()) {
446 d.add (static_cast<bool>(_dcp_content->kdm()));
447 d.add (static_cast<bool>(c->cpl()));
449 d.add (c->cpl().get());