2 Copyright (C) 2014-2015 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 "j2k_image_proxy.h"
26 #include <dcp/decrypted_kdm.h>
29 #include <dcp/mono_picture_asset.h>
30 #include <dcp/stereo_picture_asset.h>
31 #include <dcp/reel_picture_asset.h>
32 #include <dcp/reel_sound_asset.h>
33 #include <dcp/reel_subtitle_asset.h>
34 #include <dcp/mono_picture_frame.h>
35 #include <dcp/stereo_picture_frame.h>
36 #include <dcp/sound_frame.h>
37 #include <boost/foreach.hpp>
42 using boost::shared_ptr;
43 using boost::dynamic_pointer_cast;
45 DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, bool fast)
47 , AudioDecoder (c, fast)
51 dcp::DCP dcp (c->directory ());
54 dcp.add (dcp::DecryptedKDM (c->kdm().get (), Config::instance()->decryption_chain()->key().get ()));
56 DCPOMATIC_ASSERT (dcp.cpls().size() == 1);
57 _reels = dcp.cpls().front()->reels ();
58 _reel = _reels.begin ();
62 DCPDecoder::pass (PassReason reason, bool)
64 if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
68 /* Offset of the start of the current reel from the start of the content in frames */
70 list<shared_ptr<dcp::Reel> >::const_iterator i = _reels.begin();
72 offset += (*i)->main_picture()->duration ();
76 double const vfr = _dcp_content->video_frame_rate ();
78 /* Frame within the (played part of the) reel that is coming up next */
79 int64_t const frame = _next.frames_round (vfr);
81 if ((*_reel)->main_picture () && reason != PASS_REASON_SUBTITLE) {
82 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
83 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
84 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
85 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
87 video (shared_ptr<ImageProxy> (new J2KImageProxy (mono->get_frame (entry_point + frame), asset->size())), offset + frame);
90 shared_ptr<ImageProxy> (new J2KImageProxy (stereo->get_frame (entry_point + frame), asset->size(), dcp::EYE_LEFT)),
95 shared_ptr<ImageProxy> (new J2KImageProxy (stereo->get_frame (entry_point + frame), asset->size(), dcp::EYE_RIGHT)),
101 if ((*_reel)->main_sound () && reason != PASS_REASON_SUBTITLE) {
102 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
103 shared_ptr<const dcp::SoundFrame> sf = (*_reel)->main_sound()->asset()->get_frame (entry_point + frame);
104 uint8_t const * from = sf->data ();
106 int const channels = _dcp_content->audio_stream()->channels ();
107 int const frames = sf->size() / (3 * channels);
108 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
109 for (int i = 0; i < frames; ++i) {
110 for (int j = 0; j < channels; ++j) {
111 data->data()[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
116 audio (_dcp_content->audio_stream(), data, ContentTime::from_frames (offset, vfr) + _next);
119 if ((*_reel)->main_subtitle ()) {
120 int64_t const entry_point = (*_reel)->main_subtitle()->entry_point ();
121 list<dcp::SubtitleString> subs = (*_reel)->main_subtitle()->subtitle_asset()->subtitles_during (
122 dcp::Time (entry_point + frame, vfr, vfr),
123 dcp::Time (entry_point + frame + 1, vfr, vfr),
127 if (!subs.empty ()) {
128 /* XXX: assuming that all `subs' are at the same time; maybe this is ok */
131 ContentTime::from_frames (offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().in().as_seconds ()),
132 ContentTime::from_frames (offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().out().as_seconds ())
139 _next += ContentTime::from_frames (1, vfr);
141 if ((*_reel)->main_picture ()) {
142 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
144 _next = ContentTime ();
152 DCPDecoder::seek (ContentTime t, bool accurate)
154 VideoDecoder::seek (t, accurate);
155 AudioDecoder::seek (t, accurate);
156 SubtitleDecoder::seek (t, accurate);
158 _reel = _reels.begin ();
159 while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->video_frame_rate ())) {
160 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->video_frame_rate ());
168 list<ContentTimePeriod>
169 DCPDecoder::image_subtitles_during (ContentTimePeriod, bool) const
171 return list<ContentTimePeriod> ();
174 list<ContentTimePeriod>
175 DCPDecoder::text_subtitles_during (ContentTimePeriod period, bool starting) const
177 /* XXX: inefficient */
179 list<ContentTimePeriod> ctp;
180 double const vfr = _dcp_content->video_frame_rate ();
182 BOOST_FOREACH (shared_ptr<dcp::Reel> r, _reels) {
183 if (!r->main_subtitle ()) {
187 int64_t const entry_point = r->main_subtitle()->entry_point ();
189 list<dcp::SubtitleString> subs = r->main_subtitle()->subtitle_asset()->subtitles_during (
190 dcp::Time (period.from.seconds(), 1000) - dcp::Time (entry_point, vfr, vfr),
191 dcp::Time (period.to.seconds(), 1000) - dcp::Time (entry_point, vfr, vfr),
195 BOOST_FOREACH (dcp::SubtitleString const & s, subs) {
198 ContentTime::from_seconds (s.in().as_seconds ()),
199 ContentTime::from_seconds (s.out().as_seconds ())