2 Copyright (C) 2014-2018 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"
33 #include <dcp/mono_picture_asset.h>
34 #include <dcp/mono_picture_asset_reader.h>
35 #include <dcp/stereo_picture_asset.h>
36 #include <dcp/stereo_picture_asset_reader.h>
37 #include <dcp/reel_picture_asset.h>
38 #include <dcp/reel_sound_asset.h>
39 #include <dcp/reel_subtitle_asset.h>
40 #include <dcp/reel_closed_caption_asset.h>
41 #include <dcp/mono_picture_frame.h>
42 #include <dcp/stereo_picture_frame.h>
43 #include <dcp/sound_frame.h>
44 #include <dcp/sound_asset_reader.h>
45 #include <boost/foreach.hpp>
52 using boost::shared_ptr;
53 using boost::dynamic_pointer_cast;
54 using boost::optional;
56 DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log, bool fast)
58 , _decode_referenced (false)
61 video.reset (new VideoDecoder (this, c, log));
64 audio.reset (new AudioDecoder (this, c->audio, log, fast));
66 BOOST_FOREACH (shared_ptr<TextContent> i, c->text) {
67 /* XXX: this time here should be the time of the first subtitle, not 0 */
68 text.push_back (shared_ptr<TextDecoder> (new TextDecoder (this, i, log, ContentTime())));
71 list<shared_ptr<dcp::CPL> > cpl_list = cpls ();
73 if (cpl_list.empty()) {
74 throw DCPError (_("No CPLs found in DCP."));
77 shared_ptr<dcp::CPL> cpl;
78 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpl_list) {
79 if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) {
85 /* No CPL found; probably an old file that doesn't specify it;
86 just use the first one.
88 cpl = cpls().front ();
91 set_decode_referenced (false);
93 _reels = cpl->reels ();
95 _reel = _reels.begin ();
104 if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
108 double const vfr = _dcp_content->active_video_frame_rate ();
110 /* Frame within the (played part of the) reel that is coming up next */
111 int64_t const frame = _next.frames_round (vfr);
113 /* We must emit texts first as when we emit the video for this frame
114 it will expect already to have the texts.
118 if ((_mono_reader || _stereo_reader) && (_decode_referenced || !_dcp_content->reference_video())) {
119 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
120 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
123 shared_ptr<ImageProxy> (
125 _mono_reader->get_frame (entry_point + frame),
135 shared_ptr<ImageProxy> (
137 _stereo_reader->get_frame (entry_point + frame),
148 shared_ptr<ImageProxy> (
150 _stereo_reader->get_frame (entry_point + frame),
162 if (_sound_reader && (_decode_referenced || !_dcp_content->reference_audio())) {
163 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
164 shared_ptr<const dcp::SoundFrame> sf = _sound_reader->get_frame (entry_point + frame);
165 uint8_t const * from = sf->data ();
167 int const channels = _dcp_content->audio->stream()->channels ();
168 int const frames = sf->size() / (3 * channels);
169 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
170 float** data_data = data->data();
171 for (int i = 0; i < frames; ++i) {
172 for (int j = 0; j < channels; ++j) {
173 data_data[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
178 audio->emit (_dcp_content->audio->stream(), data, ContentTime::from_frames (_offset, vfr) + _next);
181 _next += ContentTime::from_frames (1, vfr);
183 if ((*_reel)->main_picture ()) {
184 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
186 _next = ContentTime ();
194 DCPDecoder::pass_texts (ContentTime next)
196 list<shared_ptr<TextDecoder> >::const_iterator decoder = text.begin ();
197 if ((*_reel)->main_subtitle()) {
198 DCPOMATIC_ASSERT (decoder != text.end ());
200 next, (*_reel)->main_subtitle()->asset(), _dcp_content->reference_text(TEXT_OPEN_SUBTITLE), (*_reel)->main_subtitle()->entry_point(), *decoder
204 BOOST_FOREACH (shared_ptr<dcp::ReelClosedCaptionAsset> i, (*_reel)->closed_captions()) {
205 DCPOMATIC_ASSERT (decoder != text.end ());
207 next, i->asset(), _dcp_content->reference_text(TEXT_CLOSED_CAPTION), i->entry_point(), *decoder
214 DCPDecoder::pass_texts (ContentTime next, shared_ptr<dcp::SubtitleAsset> asset, bool reference, int64_t entry_point, shared_ptr<TextDecoder> decoder)
216 double const vfr = _dcp_content->active_video_frame_rate ();
217 /* Frame within the (played part of the) reel that is coming up next */
218 int64_t const frame = next.frames_round (vfr);
220 if (_decode_referenced || !reference) {
221 list<shared_ptr<dcp::Subtitle> > subs = asset->subtitles_during (
222 dcp::Time (entry_point + frame, vfr, vfr),
223 dcp::Time (entry_point + frame + 1, vfr, vfr),
227 BOOST_FOREACH (shared_ptr<dcp::Subtitle> i, subs) {
228 shared_ptr<dcp::SubtitleString> is = dynamic_pointer_cast<dcp::SubtitleString> (i);
230 list<dcp::SubtitleString> s;
232 decoder->emit_plain (
234 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i->in().as_seconds ()),
235 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i->out().as_seconds ())
241 /* XXX: image subtitles */
247 DCPDecoder::next_reel ()
249 _offset += (*_reel)->main_picture()->duration();
255 DCPDecoder::get_readers ()
257 if (_reel == _reels.end() || !_dcp_content->can_be_played ()) {
258 _mono_reader.reset ();
259 _stereo_reader.reset ();
260 _sound_reader.reset ();
264 if ((*_reel)->main_picture()) {
265 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
266 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
267 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
268 DCPOMATIC_ASSERT (mono || stereo);
270 _mono_reader = mono->start_read ();
271 _stereo_reader.reset ();
273 _stereo_reader = stereo->start_read ();
274 _mono_reader.reset ();
277 _mono_reader.reset ();
278 _stereo_reader.reset ();
281 if ((*_reel)->main_sound()) {
282 _sound_reader = (*_reel)->main_sound()->asset()->start_read ();
284 _sound_reader.reset ();
289 DCPDecoder::seek (ContentTime t, bool accurate)
291 if (!_dcp_content->can_be_played ()) {
295 Decoder::seek (t, accurate);
297 _reel = _reels.begin ();
301 int const pre_roll_seconds = 2;
303 /* Pre-roll for subs */
305 ContentTime pre = t - ContentTime::from_seconds (pre_roll_seconds);
306 if (pre < ContentTime()) {
307 pre = ContentTime ();
310 /* Seek to pre-roll position */
312 while (_reel != _reels.end() && pre >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
313 ContentTime rd = ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
319 /* Pass texts in the pre-roll */
321 double const vfr = _dcp_content->active_video_frame_rate ();
322 for (int i = 0; i < pre_roll_seconds * vfr; ++i) {
324 pre += ContentTime::from_frames (1, vfr);
327 /* Seek to correct position */
329 while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
330 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
338 DCPDecoder::set_decode_referenced (bool r)
340 _decode_referenced = r;
343 video->set_ignore (_dcp_content->reference_video() && !_decode_referenced);
346 audio->set_ignore (_dcp_content->reference_audio() && !_decode_referenced);
351 DCPDecoder::set_forced_reduction (optional<int> reduction)
353 _forced_reduction = reduction;