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 /* XXX: this time here should be the time of the first subtitle, not 0 */
63 subtitle.reset (new SubtitleDecoder (this, c->subtitle, log, ContentTime()));
66 shared_ptr<dcp::CPL> cpl;
67 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls ()) {
68 if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) {
74 /* No CPL found; probably an old file that doesn't specify it;
75 just use the first one.
77 cpl = cpls().front ();
80 set_decode_referenced (false);
82 _reels = cpl->reels ();
84 _reel = _reels.begin ();
93 if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
97 double const vfr = _dcp_content->active_video_frame_rate ();
99 /* Frame within the (played part of the) reel that is coming up next */
100 int64_t const frame = _next.frames_round (vfr);
102 /* We must emit subtitles first as when we emit the video for this frame
103 it will expect already to have the subs.
105 pass_subtitles (_next);
107 if ((_mono_reader || _stereo_reader) && (_decode_referenced || !_dcp_content->reference_video())) {
108 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
109 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
112 shared_ptr<ImageProxy> (
114 _mono_reader->get_frame (entry_point + frame),
124 shared_ptr<ImageProxy> (
126 _stereo_reader->get_frame (entry_point + frame),
137 shared_ptr<ImageProxy> (
139 _stereo_reader->get_frame (entry_point + frame),
151 if (_sound_reader && (_decode_referenced || !_dcp_content->reference_audio())) {
152 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
153 shared_ptr<const dcp::SoundFrame> sf = _sound_reader->get_frame (entry_point + frame);
154 uint8_t const * from = sf->data ();
156 int const channels = _dcp_content->audio->stream()->channels ();
157 int const frames = sf->size() / (3 * channels);
158 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
159 float** data_data = data->data();
160 for (int i = 0; i < frames; ++i) {
161 for (int j = 0; j < channels; ++j) {
162 data_data[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
167 audio->emit (_dcp_content->audio->stream(), data, ContentTime::from_frames (_offset, vfr) + _next);
170 _next += ContentTime::from_frames (1, vfr);
172 if ((*_reel)->main_picture ()) {
173 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
175 _next = ContentTime ();
183 DCPDecoder::pass_subtitles (ContentTime next)
185 double const vfr = _dcp_content->active_video_frame_rate ();
186 /* Frame within the (played part of the) reel that is coming up next */
187 int64_t const frame = next.frames_round (vfr);
189 if ((*_reel)->main_subtitle() && (_decode_referenced || !_dcp_content->reference_subtitle())) {
190 int64_t const entry_point = (*_reel)->main_subtitle()->entry_point ();
191 list<dcp::SubtitleString> subs = (*_reel)->main_subtitle()->asset()->subtitles_during (
192 dcp::Time (entry_point + frame, vfr, vfr),
193 dcp::Time (entry_point + frame + 1, vfr, vfr),
197 BOOST_FOREACH (dcp::SubtitleString i, subs) {
198 list<dcp::SubtitleString> s;
200 subtitle->emit_text (
202 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i.in().as_seconds ()),
203 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i.out().as_seconds ())
212 DCPDecoder::next_reel ()
214 _offset += (*_reel)->main_picture()->duration();
220 DCPDecoder::get_readers ()
222 if (_reel == _reels.end() || !_dcp_content->can_be_played ()) {
223 _mono_reader.reset ();
224 _stereo_reader.reset ();
225 _sound_reader.reset ();
229 if ((*_reel)->main_picture()) {
230 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
231 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
232 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
233 DCPOMATIC_ASSERT (mono || stereo);
235 _mono_reader = mono->start_read ();
236 _stereo_reader.reset ();
238 _stereo_reader = stereo->start_read ();
239 _mono_reader.reset ();
242 _mono_reader.reset ();
243 _stereo_reader.reset ();
246 if ((*_reel)->main_sound()) {
247 _sound_reader = (*_reel)->main_sound()->asset()->start_read ();
249 _sound_reader.reset ();
254 DCPDecoder::seek (ContentTime t, bool accurate)
256 Decoder::seek (t, accurate);
258 _reel = _reels.begin ();
262 int const pre_roll_seconds = 2;
264 /* Pre-roll for subs */
266 ContentTime pre = t - ContentTime::from_seconds (pre_roll_seconds);
267 if (pre < ContentTime()) {
268 pre = ContentTime ();
271 /* Seek to pre-roll position */
273 while (_reel != _reels.end() && pre >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
274 ContentTime rd = ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
280 /* Pass subtitles in the pre-roll */
282 double const vfr = _dcp_content->active_video_frame_rate ();
283 for (int i = 0; i < pre_roll_seconds * vfr; ++i) {
284 pass_subtitles (pre);
285 pre += ContentTime::from_frames (1, vfr);
288 /* Seek to correct position */
290 while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
291 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
299 DCPDecoder::set_decode_referenced (bool r)
301 _decode_referenced = r;
303 video->set_ignore (_dcp_content->reference_video() && !_decode_referenced);
304 audio->set_ignore (_dcp_content->reference_audio() && !_decode_referenced);
308 DCPDecoder::set_forced_reduction (optional<int> reduction)
310 _forced_reduction = reduction;