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, bool fast)
56 video.reset (new VideoDecoder (this, c, log));
57 audio.reset (new AudioDecoder (this, c->audio, fast, log));
63 bind (&DCPDecoder::image_subtitles_during, this, _1, _2),
64 bind (&DCPDecoder::text_subtitles_during, this, _1, _2)
68 dcp::DCP dcp (c->directory ());
69 dcp.read (false, 0, true);
71 dcp.add (dcp::DecryptedKDM (c->kdm().get (), Config::instance()->decryption_chain()->key().get ()));
73 DCPOMATIC_ASSERT (dcp.cpls().size() == 1);
74 _reels = dcp.cpls().front()->reels ();
76 _reel = _reels.begin ();
82 DCPDecoder::pass (PassReason reason, bool)
84 if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
88 double const vfr = _dcp_content->active_video_frame_rate ();
90 /* Frame within the (played part of the) reel that is coming up next */
91 int64_t const frame = _next.frames_round (vfr);
93 if ((_mono_reader || _stereo_reader) && reason != PASS_REASON_SUBTITLE) {
94 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
95 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
97 video->give (shared_ptr<ImageProxy> (new J2KImageProxy (_mono_reader->get_frame (entry_point + frame), asset->size())), _offset + frame);
100 shared_ptr<ImageProxy> (new J2KImageProxy (_stereo_reader->get_frame (entry_point + frame), asset->size(), dcp::EYE_LEFT)),
105 shared_ptr<ImageProxy> (new J2KImageProxy (_stereo_reader->get_frame (entry_point + frame), asset->size(), dcp::EYE_RIGHT)),
111 if (_sound_reader && reason != PASS_REASON_SUBTITLE) {
112 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
113 shared_ptr<const dcp::SoundFrame> sf = _sound_reader->get_frame (entry_point + frame);
114 uint8_t const * from = sf->data ();
116 int const channels = _dcp_content->audio->stream()->channels ();
117 int const frames = sf->size() / (3 * channels);
118 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
119 for (int i = 0; i < frames; ++i) {
120 for (int j = 0; j < channels; ++j) {
121 data->data()[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
126 audio->give (_dcp_content->audio->stream(), data, ContentTime::from_frames (_offset, vfr) + _next);
129 if ((*_reel)->main_subtitle ()) {
130 int64_t const entry_point = (*_reel)->main_subtitle()->entry_point ();
131 list<dcp::SubtitleString> subs = (*_reel)->main_subtitle()->asset()->subtitles_during (
132 dcp::Time (entry_point + frame, vfr, vfr),
133 dcp::Time (entry_point + frame + 1, vfr, vfr),
137 if (!subs.empty ()) {
138 /* XXX: assuming that all `subs' are at the same time; maybe this is ok */
139 subtitle->give_text (
141 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().in().as_seconds ()),
142 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().out().as_seconds ())
149 _next += ContentTime::from_frames (1, vfr);
151 if ((*_reel)->main_picture ()) {
152 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
154 _next = ContentTime ();
162 DCPDecoder::next_reel ()
164 _offset += (*_reel)->main_picture()->duration();
170 DCPDecoder::get_readers ()
172 if (_reel == _reels.end()) {
173 _mono_reader.reset ();
174 _stereo_reader.reset ();
175 _sound_reader.reset ();
179 if ((*_reel)->main_picture()) {
180 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
181 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
182 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
183 DCPOMATIC_ASSERT (mono || stereo);
185 _mono_reader = mono->start_read ();
186 _stereo_reader.reset ();
188 _stereo_reader = stereo->start_read ();
189 _mono_reader.reset ();
192 _mono_reader.reset ();
193 _stereo_reader.reset ();
196 if ((*_reel)->main_sound()) {
197 _sound_reader = (*_reel)->main_sound()->asset()->start_read ();
199 _sound_reader.reset ();
204 DCPDecoder::seek (ContentTime t, bool accurate)
206 video->seek (t, accurate);
207 audio->seek (t, accurate);
208 subtitle->seek (t, accurate);
211 _reel = _reels.begin ();
212 while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
213 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
221 list<ContentTimePeriod>
222 DCPDecoder::image_subtitles_during (ContentTimePeriod, bool) const
224 return list<ContentTimePeriod> ();
227 list<ContentTimePeriod>
228 DCPDecoder::text_subtitles_during (ContentTimePeriod period, bool starting) const
230 /* XXX: inefficient */
232 list<ContentTimePeriod> ctp;
233 double const vfr = _dcp_content->active_video_frame_rate ();
235 BOOST_FOREACH (shared_ptr<dcp::Reel> r, _reels) {
236 if (!r->main_subtitle ()) {
240 int64_t const entry_point = r->main_subtitle()->entry_point ();
242 list<dcp::SubtitleString> subs = r->main_subtitle()->asset()->subtitles_during (
243 dcp::Time (period.from.seconds(), 1000) - dcp::Time (entry_point, vfr, vfr),
244 dcp::Time (period.to.seconds(), 1000) - dcp::Time (entry_point, vfr, vfr),
248 BOOST_FOREACH (dcp::SubtitleString const & s, subs) {
251 ContentTime::from_seconds (s.in().as_seconds ()),
252 ContentTime::from_seconds (s.out().as_seconds ())