2 Copyright (C) 2014-2016 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "dcp_decoder.h"
21 #include "dcp_content.h"
22 #include "audio_content.h"
23 #include "j2k_image_proxy.h"
27 #include <dcp/decrypted_kdm.h>
30 #include <dcp/mono_picture_asset.h>
31 #include <dcp/stereo_picture_asset.h>
32 #include <dcp/reel_picture_asset.h>
33 #include <dcp/reel_sound_asset.h>
34 #include <dcp/reel_subtitle_asset.h>
35 #include <dcp/mono_picture_frame.h>
36 #include <dcp/stereo_picture_frame.h>
37 #include <dcp/sound_frame.h>
38 #include <boost/foreach.hpp>
43 using boost::shared_ptr;
44 using boost::dynamic_pointer_cast;
46 DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log, bool fast)
47 : VideoDecoder (c, log)
48 , AudioDecoder (c->audio, fast, log)
49 , SubtitleDecoder (c->subtitle)
52 dcp::DCP dcp (c->directory ());
53 dcp.read (false, 0, true);
55 dcp.add (dcp::DecryptedKDM (c->kdm().get (), Config::instance()->decryption_chain()->key().get ()));
57 DCPOMATIC_ASSERT (dcp.cpls().size() == 1);
58 _reels = dcp.cpls().front()->reels ();
59 _reel = _reels.begin ();
63 DCPDecoder::pass (PassReason reason, bool)
65 if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
69 /* Offset of the start of the current reel from the start of the content in frames */
71 list<shared_ptr<dcp::Reel> >::const_iterator i = _reels.begin();
73 offset += (*i)->main_picture()->duration ();
77 double const vfr = _dcp_content->active_video_frame_rate ();
79 /* Frame within the (played part of the) reel that is coming up next */
80 int64_t const frame = _next.frames_round (vfr);
82 if ((*_reel)->main_picture () && reason != PASS_REASON_SUBTITLE) {
83 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
84 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
85 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
86 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
88 video (shared_ptr<ImageProxy> (new J2KImageProxy (mono->get_frame (entry_point + frame), asset->size())), offset + frame);
91 shared_ptr<ImageProxy> (new J2KImageProxy (stereo->get_frame (entry_point + frame), asset->size(), dcp::EYE_LEFT)),
96 shared_ptr<ImageProxy> (new J2KImageProxy (stereo->get_frame (entry_point + frame), asset->size(), dcp::EYE_RIGHT)),
102 if ((*_reel)->main_sound () && reason != PASS_REASON_SUBTITLE) {
103 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
104 shared_ptr<const dcp::SoundFrame> sf = (*_reel)->main_sound()->asset()->get_frame (entry_point + frame);
105 uint8_t const * from = sf->data ();
107 int const channels = _dcp_content->audio->stream()->channels ();
108 int const frames = sf->size() / (3 * channels);
109 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
110 for (int i = 0; i < frames; ++i) {
111 for (int j = 0; j < channels; ++j) {
112 data->data()[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
117 audio (_dcp_content->audio->stream(), data, ContentTime::from_frames (offset, vfr) + _next);
120 if ((*_reel)->main_subtitle ()) {
121 int64_t const entry_point = (*_reel)->main_subtitle()->entry_point ();
122 list<dcp::SubtitleString> subs = (*_reel)->main_subtitle()->asset()->subtitles_during (
123 dcp::Time (entry_point + frame, vfr, vfr),
124 dcp::Time (entry_point + frame + 1, vfr, vfr),
128 if (!subs.empty ()) {
129 /* XXX: assuming that all `subs' are at the same time; maybe this is ok */
132 ContentTime::from_frames (offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().in().as_seconds ()),
133 ContentTime::from_frames (offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().out().as_seconds ())
140 _next += ContentTime::from_frames (1, vfr);
142 if ((*_reel)->main_picture ()) {
143 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
145 _next = ContentTime ();
153 DCPDecoder::seek (ContentTime t, bool accurate)
155 VideoDecoder::seek (t, accurate);
156 AudioDecoder::seek (t, accurate);
157 SubtitleDecoder::seek (t, accurate);
159 _reel = _reels.begin ();
160 while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
161 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
169 list<ContentTimePeriod>
170 DCPDecoder::image_subtitles_during (ContentTimePeriod, bool) const
172 return list<ContentTimePeriod> ();
175 list<ContentTimePeriod>
176 DCPDecoder::text_subtitles_during (ContentTimePeriod period, bool starting) const
178 /* XXX: inefficient */
180 list<ContentTimePeriod> ctp;
181 double const vfr = _dcp_content->active_video_frame_rate ();
183 BOOST_FOREACH (shared_ptr<dcp::Reel> r, _reels) {
184 if (!r->main_subtitle ()) {
188 int64_t const entry_point = r->main_subtitle()->entry_point ();
190 list<dcp::SubtitleString> subs = r->main_subtitle()->asset()->subtitles_during (
191 dcp::Time (period.from.seconds(), 1000) - dcp::Time (entry_point, vfr, vfr),
192 dcp::Time (period.to.seconds(), 1000) - dcp::Time (entry_point, vfr, vfr),
196 BOOST_FOREACH (dcp::SubtitleString const & s, subs) {
199 ContentTime::from_seconds (s.in().as_seconds ()),
200 ContentTime::from_seconds (s.out().as_seconds ())