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"
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/mono_picture_frame.h>
41 #include <dcp/stereo_picture_frame.h>
42 #include <dcp/sound_frame.h>
43 #include <dcp/sound_asset_reader.h>
44 #include <boost/foreach.hpp>
49 using boost::shared_ptr;
50 using boost::dynamic_pointer_cast;
51 using boost::optional;
53 DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log, bool fast)
55 , _decode_referenced (false)
57 video.reset (new VideoDecoder (this, c, log));
59 audio.reset (new AudioDecoder (this, c->audio, log, fast));
62 subtitle.reset (new SubtitleDecoder (this, c->subtitle, log));
65 shared_ptr<dcp::CPL> cpl;
66 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls ()) {
67 if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) {
73 /* No CPL found; probably an old file that doesn't specify it;
74 just use the first one.
76 cpl = cpls().front ();
79 _reels = cpl->reels ();
81 _reel = _reels.begin ();
89 if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
93 double const vfr = _dcp_content->active_video_frame_rate ();
95 /* Frame within the (played part of the) reel that is coming up next */
96 int64_t const frame = _next.frames_round (vfr);
98 if ((_mono_reader || _stereo_reader) && (_decode_referenced || !_dcp_content->reference_video())) {
99 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
100 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
103 shared_ptr<ImageProxy> (
105 _mono_reader->get_frame (entry_point + frame),
115 shared_ptr<ImageProxy> (
117 _stereo_reader->get_frame (entry_point + frame),
128 shared_ptr<ImageProxy> (
130 _stereo_reader->get_frame (entry_point + frame),
142 if (_sound_reader && (_decode_referenced || !_dcp_content->reference_audio())) {
143 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
144 shared_ptr<const dcp::SoundFrame> sf = _sound_reader->get_frame (entry_point + frame);
145 uint8_t const * from = sf->data ();
147 int const channels = _dcp_content->audio->stream()->channels ();
148 int const frames = sf->size() / (3 * channels);
149 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
150 float** data_data = data->data();
151 for (int i = 0; i < frames; ++i) {
152 for (int j = 0; j < channels; ++j) {
153 data_data[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
158 audio->emit (_dcp_content->audio->stream(), data, ContentTime::from_frames (_offset, vfr) + _next);
161 if ((*_reel)->main_subtitle() && (_decode_referenced || !_dcp_content->reference_subtitle())) {
162 int64_t const entry_point = (*_reel)->main_subtitle()->entry_point ();
163 list<dcp::SubtitleString> subs = (*_reel)->main_subtitle()->asset()->subtitles_during (
164 dcp::Time (entry_point + frame, vfr, vfr),
165 dcp::Time (entry_point + frame + 1, vfr, vfr),
169 if (!subs.empty ()) {
170 /* XXX: assuming that all `subs' are at the same time; maybe this is ok */
171 subtitle->emit_text (
173 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().in().as_seconds ()),
174 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().out().as_seconds ())
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::next_reel ()
196 _offset += (*_reel)->main_picture()->duration();
202 DCPDecoder::get_readers ()
204 if (_reel == _reels.end() || !_dcp_content->can_be_played ()) {
205 _mono_reader.reset ();
206 _stereo_reader.reset ();
207 _sound_reader.reset ();
211 if ((*_reel)->main_picture()) {
212 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
213 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
214 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
215 DCPOMATIC_ASSERT (mono || stereo);
217 _mono_reader = mono->start_read ();
218 _stereo_reader.reset ();
220 _stereo_reader = stereo->start_read ();
221 _mono_reader.reset ();
224 _mono_reader.reset ();
225 _stereo_reader.reset ();
228 if ((*_reel)->main_sound()) {
229 _sound_reader = (*_reel)->main_sound()->asset()->start_read ();
231 _sound_reader.reset ();
236 DCPDecoder::seek (ContentTime t, bool accurate)
238 Decoder::seek (t, accurate);
240 _reel = _reels.begin ();
244 while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
245 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
253 DCPDecoder::set_decode_referenced ()
255 _decode_referenced = true;
259 DCPDecoder::set_forced_reduction (optional<int> reduction)
261 _forced_reduction = reduction;