2 Copyright (C) 2014-2016 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 "subtitle_decoder.h"
31 #include <dcp/decrypted_kdm.h>
34 #include <dcp/mono_picture_asset.h>
35 #include <dcp/mono_picture_asset_reader.h>
36 #include <dcp/stereo_picture_asset.h>
37 #include <dcp/stereo_picture_asset_reader.h>
38 #include <dcp/reel_picture_asset.h>
39 #include <dcp/reel_sound_asset.h>
40 #include <dcp/reel_subtitle_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>
50 using boost::shared_ptr;
51 using boost::dynamic_pointer_cast;
53 DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log)
55 , _decode_referenced (false)
57 video.reset (new VideoDecoder (this, c, log));
58 audio.reset (new AudioDecoder (this, c->audio, log));
65 bind (&DCPDecoder::image_subtitles_during, this, _1, _2),
66 bind (&DCPDecoder::text_subtitles_during, this, _1, _2)
70 shared_ptr<dcp::CPL> cpl;
71 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls ()) {
72 if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) {
78 /* No CPL found; probably an old file that doesn't specify it;
79 just use the first one.
81 cpl = cpls().front ();
84 _reels = cpl->reels ();
86 _reel = _reels.begin ();
92 DCPDecoder::pass (PassReason reason, bool)
94 if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
98 double const vfr = _dcp_content->active_video_frame_rate ();
100 /* Frame within the (played part of the) reel that is coming up next */
101 int64_t const frame = _next.frames_round (vfr);
103 if ((_mono_reader || _stereo_reader) && reason != PASS_REASON_SUBTITLE && (_decode_referenced || !_dcp_content->reference_video())) {
104 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
105 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
108 shared_ptr<ImageProxy> (
109 new J2KImageProxy (_mono_reader->get_frame (entry_point + frame), asset->size(), AV_PIX_FMT_XYZ12LE)
115 shared_ptr<ImageProxy> (
116 new J2KImageProxy (_stereo_reader->get_frame (entry_point + frame), asset->size(), dcp::EYE_LEFT, AV_PIX_FMT_XYZ12LE)),
121 shared_ptr<ImageProxy> (
122 new J2KImageProxy (_stereo_reader->get_frame (entry_point + frame), asset->size(), dcp::EYE_RIGHT, AV_PIX_FMT_XYZ12LE)),
128 if (_sound_reader && reason != PASS_REASON_SUBTITLE && (_decode_referenced || !_dcp_content->reference_audio())) {
129 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
130 shared_ptr<const dcp::SoundFrame> sf = _sound_reader->get_frame (entry_point + frame);
131 uint8_t const * from = sf->data ();
133 int const channels = _dcp_content->audio->stream()->channels ();
134 int const frames = sf->size() / (3 * channels);
135 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
136 float** data_data = data->data();
137 for (int i = 0; i < frames; ++i) {
138 for (int j = 0; j < channels; ++j) {
139 data_data[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
144 audio->give (_dcp_content->audio->stream(), data, ContentTime::from_frames (_offset, vfr) + _next);
147 if ((*_reel)->main_subtitle() && (_decode_referenced || !_dcp_content->reference_subtitle())) {
148 int64_t const entry_point = (*_reel)->main_subtitle()->entry_point ();
149 list<dcp::SubtitleString> subs = (*_reel)->main_subtitle()->asset()->subtitles_during (
150 dcp::Time (entry_point + frame, vfr, vfr),
151 dcp::Time (entry_point + frame + 1, vfr, vfr),
155 if (!subs.empty ()) {
156 /* XXX: assuming that all `subs' are at the same time; maybe this is ok */
157 subtitle->give_text (
159 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().in().as_seconds ()),
160 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().out().as_seconds ())
167 _next += ContentTime::from_frames (1, vfr);
169 if ((*_reel)->main_picture ()) {
170 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
172 _next = ContentTime ();
180 DCPDecoder::next_reel ()
182 _offset += (*_reel)->main_picture()->duration();
188 DCPDecoder::get_readers ()
190 if (_reel == _reels.end() || !_dcp_content->can_be_played ()) {
191 _mono_reader.reset ();
192 _stereo_reader.reset ();
193 _sound_reader.reset ();
197 if ((*_reel)->main_picture()) {
198 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
199 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
200 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
201 DCPOMATIC_ASSERT (mono || stereo);
203 _mono_reader = mono->start_read ();
204 _stereo_reader.reset ();
206 _stereo_reader = stereo->start_read ();
207 _mono_reader.reset ();
210 _mono_reader.reset ();
211 _stereo_reader.reset ();
214 if ((*_reel)->main_sound()) {
215 _sound_reader = (*_reel)->main_sound()->asset()->start_read ();
217 _sound_reader.reset ();
222 DCPDecoder::seek (ContentTime t, bool accurate)
224 video->seek (t, accurate);
225 audio->seek (t, accurate);
226 subtitle->seek (t, accurate);
228 _reel = _reels.begin ();
232 while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
233 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
241 list<ContentTimePeriod>
242 DCPDecoder::image_subtitles_during (ContentTimePeriod, bool) const
244 return list<ContentTimePeriod> ();
247 list<ContentTimePeriod>
248 DCPDecoder::text_subtitles_during (ContentTimePeriod period, bool starting) const
250 /* XXX: inefficient */
252 list<ContentTimePeriod> ctp;
253 double const vfr = _dcp_content->active_video_frame_rate ();
257 BOOST_FOREACH (shared_ptr<dcp::Reel> r, _reels) {
258 if (!r->main_subtitle ()) {
259 offset += r->main_picture()->duration();
263 int64_t const entry_point = r->main_subtitle()->entry_point ();
265 list<dcp::SubtitleString> subs = r->main_subtitle()->asset()->subtitles_during (
266 dcp::Time (period.from.seconds(), 1000) - dcp::Time (offset - entry_point, vfr, vfr),
267 dcp::Time (period.to.seconds(), 1000) - dcp::Time (offset - entry_point, vfr, vfr),
271 BOOST_FOREACH (dcp::SubtitleString const & s, subs) {
274 ContentTime::from_seconds (s.in().as_seconds ()) + ContentTime::from_frames (offset - entry_point, vfr),
275 ContentTime::from_seconds (s.out().as_seconds ()) + ContentTime::from_frames (offset - entry_point, vfr)
280 offset += r->main_subtitle()->duration();
287 DCPDecoder::set_decode_referenced ()
289 _decode_referenced = true;