src/lib/dcp_decoder.cc

   1 /*
   2     Copyright (C) 2014-2016 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   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.
  10
  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.
  15
  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/>.
  18
  19 */
  20
  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"
  28 #include "image.h"
  29 #include "config.h"
  30 #include <dcp/dcp.h>
  31 #include <dcp/decrypted_kdm.h>
  32 #include <dcp/cpl.h>
  33 #include <dcp/reel.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>
  46 #include <iostream>
  47
  48 using std::list;
  49 using std::cout;
  50 using boost::shared_ptr;
  51 using boost::dynamic_pointer_cast;
  52
  53 DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log)
  54         : DCP (c)
  55         , _decode_referenced (false)
  56 {
  57         video.reset (new VideoDecoder (this, c, log));
  58         audio.reset (new AudioDecoder (this, c->audio, log));
  59
  60         subtitle.reset (
  61                 new SubtitleDecoder (
  62                         this,
  63                         c->subtitle,
  64                         bind (&DCPDecoder::image_subtitles_during, this, _1, _2),
  65                         bind (&DCPDecoder::text_subtitles_during, this, _1, _2)
  66                         )
  67                 );
  68
  69         shared_ptr<dcp::CPL> cpl;
  70         BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls ()) {
  71                 if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) {
  72                         cpl = i;
  73                 }
  74         }
  75
  76         DCPOMATIC_ASSERT (cpl);
  77         _reels = cpl->reels ();
  78
  79         _reel = _reels.begin ();
  80         _offset = 0;
  81         get_readers ();
  82 }
  83
  84 bool
  85 DCPDecoder::pass (PassReason reason, bool)
  86 {
  87         if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
  88                 return true;
  89         }
  90
  91         double const vfr = _dcp_content->active_video_frame_rate ();
  92
  93         /* Frame within the (played part of the) reel that is coming up next */
  94         int64_t const frame = _next.frames_round (vfr);
  95
  96         if ((_mono_reader || _stereo_reader) && reason != PASS_REASON_SUBTITLE && (_decode_referenced || !_dcp_content->reference_video())) {
  97                 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
  98                 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
  99                 if (_mono_reader) {
 100                         video->give (
 101                                 shared_ptr<ImageProxy> (
 102                                         new J2KImageProxy (_mono_reader->get_frame (entry_point + frame), asset->size(), AV_PIX_FMT_XYZ12LE)
 103                                         ),
 104                                 _offset + frame
 105                                 );
 106                 } else {
 107                         video->give (
 108                                 shared_ptr<ImageProxy> (
 109                                         new J2KImageProxy (_stereo_reader->get_frame (entry_point + frame), asset->size(), dcp::EYE_LEFT, AV_PIX_FMT_XYZ12LE)),
 110                                 _offset + frame
 111                                 );
 112
 113                         video->give (
 114                                 shared_ptr<ImageProxy> (
 115                                         new J2KImageProxy (_stereo_reader->get_frame (entry_point + frame), asset->size(), dcp::EYE_RIGHT, AV_PIX_FMT_XYZ12LE)),
 116                                 _offset + frame
 117                                 );
 118                 }
 119         }
 120
 121         if (_sound_reader && reason != PASS_REASON_SUBTITLE && (_decode_referenced || !_dcp_content->reference_audio())) {
 122                 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
 123                 shared_ptr<const dcp::SoundFrame> sf = _sound_reader->get_frame (entry_point + frame);
 124                 uint8_t const * from = sf->data ();
 125
 126                 int const channels = _dcp_content->audio->stream()->channels ();
 127                 int const frames = sf->size() / (3 * channels);
 128                 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
 129                 float** data_data = data->data();
 130                 for (int i = 0; i < frames; ++i) {
 131                         for (int j = 0; j < channels; ++j) {
 132                                 data_data[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
 133                                 from += 3;
 134                         }
 135                 }
 136
 137                 audio->give (_dcp_content->audio->stream(), data, ContentTime::from_frames (_offset, vfr) + _next);
 138         }
 139
 140         if ((*_reel)->main_subtitle() && (_decode_referenced || !_dcp_content->reference_subtitle())) {
 141                 int64_t const entry_point = (*_reel)->main_subtitle()->entry_point ();
 142                 list<dcp::SubtitleString> subs = (*_reel)->main_subtitle()->asset()->subtitles_during (
 143                         dcp::Time (entry_point + frame, vfr, vfr),
 144                         dcp::Time (entry_point + frame + 1, vfr, vfr),
 145                         true
 146                         );
 147
 148                 if (!subs.empty ()) {
 149                         /* XXX: assuming that all `subs' are at the same time; maybe this is ok */
 150                         subtitle->give_text (
 151                                 ContentTimePeriod (
 152                                         ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().in().as_seconds ()),
 153                                         ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().out().as_seconds ())
 154                                         ),
 155                                 subs
 156                                 );
 157                 }
 158         }
 159
 160         _next += ContentTime::from_frames (1, vfr);
 161
 162         if ((*_reel)->main_picture ()) {
 163                 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
 164                         next_reel ();
 165                         _next = ContentTime ();
 166                 }
 167         }
 168
 169         return false;
 170 }
 171
 172 void
 173 DCPDecoder::next_reel ()
 174 {
 175         _offset += (*_reel)->main_picture()->duration();
 176         ++_reel;
 177         get_readers ();
 178 }
 179
 180 void
 181 DCPDecoder::get_readers ()
 182 {
 183         if (_reel == _reels.end() || !_dcp_content->can_be_played ()) {
 184                 _mono_reader.reset ();
 185                 _stereo_reader.reset ();
 186                 _sound_reader.reset ();
 187                 return;
 188         }
 189
 190         if ((*_reel)->main_picture()) {
 191                 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
 192                 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
 193                 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
 194                 DCPOMATIC_ASSERT (mono || stereo);
 195                 if (mono) {
 196                         _mono_reader = mono->start_read ();
 197                         _stereo_reader.reset ();
 198                 } else {
 199                         _stereo_reader = stereo->start_read ();
 200                         _mono_reader.reset ();
 201                 }
 202         } else {
 203                 _mono_reader.reset ();
 204                 _stereo_reader.reset ();
 205         }
 206
 207         if ((*_reel)->main_sound()) {
 208                 _sound_reader = (*_reel)->main_sound()->asset()->start_read ();
 209         } else {
 210                 _sound_reader.reset ();
 211         }
 212 }
 213
 214 void
 215 DCPDecoder::seek (ContentTime t, bool accurate)
 216 {
 217         video->seek (t, accurate);
 218         audio->seek (t, accurate);
 219         subtitle->seek (t, accurate);
 220
 221         _reel = _reels.begin ();
 222         _offset = 0;
 223         get_readers ();
 224
 225         while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
 226                 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
 227                 next_reel ();
 228         }
 229
 230         _next = t;
 231 }
 232
 233
 234 list<ContentTimePeriod>
 235 DCPDecoder::image_subtitles_during (ContentTimePeriod, bool) const
 236 {
 237         return list<ContentTimePeriod> ();
 238 }
 239
 240 list<ContentTimePeriod>
 241 DCPDecoder::text_subtitles_during (ContentTimePeriod period, bool starting) const
 242 {
 243         /* XXX: inefficient */
 244
 245         list<ContentTimePeriod> ctp;
 246         double const vfr = _dcp_content->active_video_frame_rate ();
 247
 248         BOOST_FOREACH (shared_ptr<dcp::Reel> r, _reels) {
 249                 if (!r->main_subtitle ()) {
 250                         continue;
 251                 }
 252
 253                 int64_t const entry_point = r->main_subtitle()->entry_point ();
 254
 255                 list<dcp::SubtitleString> subs = r->main_subtitle()->asset()->subtitles_during (
 256                         dcp::Time (period.from.seconds(), 1000) - dcp::Time (entry_point, vfr, vfr),
 257                         dcp::Time (period.to.seconds(), 1000) - dcp::Time (entry_point, vfr, vfr),
 258                         starting
 259                         );
 260
 261                 BOOST_FOREACH (dcp::SubtitleString const & s, subs) {
 262                         ctp.push_back (
 263                                 ContentTimePeriod (
 264                                         ContentTime::from_seconds (s.in().as_seconds ()),
 265                                         ContentTime::from_seconds (s.out().as_seconds ())
 266                                         )
 267                                 );
 268                 }
 269         }
 270
 271         return ctp;
 272 }
 273
 274 void
 275 DCPDecoder::set_decode_referenced ()
 276 {
 277         _decode_referenced = true;
 278 }