src/lib/dcp_examiner.cc

   1 /*
   2     Copyright (C) 2014 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_examiner.h"
  22 #include "dcp_content.h"
  23 #include "exceptions.h"
  24 #include "image.h"
  25 #include "config.h"
  26 #include <dcp/dcp.h>
  27 #include <dcp/decrypted_kdm.h>
  28 #include <dcp/cpl.h>
  29 #include <dcp/reel.h>
  30 #include <dcp/reel_picture_asset.h>
  31 #include <dcp/reel_sound_asset.h>
  32 #include <dcp/mono_picture_asset.h>
  33 #include <dcp/mono_picture_asset_reader.h>
  34 #include <dcp/mono_picture_frame.h>
  35 #include <dcp/stereo_picture_asset.h>
  36 #include <dcp/stereo_picture_asset_reader.h>
  37 #include <dcp/stereo_picture_frame.h>
  38 #include <dcp/sound_asset.h>
  39 #include <dcp/sound_asset_reader.h>
  40 #include <dcp/subtitle_asset.h>
  41 #include <dcp/reel_subtitle_asset.h>
  42 #include <dcp/reel_closed_caption_asset.h>
  43 #include <dcp/sound_asset.h>
  44 #include <boost/foreach.hpp>
  45 #include <iostream>
  46
  47 #include "i18n.h"
  48
  49 using std::list;
  50 using std::cout;
  51 using std::runtime_error;
  52 using boost::shared_ptr;
  53 using boost::dynamic_pointer_cast;
  54
  55 DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content)
  56         : DCP (content)
  57         , _video_length (0)
  58         , _audio_length (0)
  59         , _has_video (false)
  60         , _has_audio (false)
  61         , _encrypted (false)
  62         , _needs_assets (false)
  63         , _kdm_valid (false)
  64         , _three_d (false)
  65 {
  66         shared_ptr<dcp::CPL> cpl;
  67
  68         for (int i = 0; i < TEXT_COUNT; ++i) {
  69                 _has_text[i] = false;
  70         }
  71
  72         if (content->cpl ()) {
  73                 /* Use the CPL that the content was using before */
  74                 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls()) {
  75                         if (i->id() == content->cpl().get()) {
  76                                 cpl = i;
  77                         }
  78                 }
  79         } else {
  80                 /* Choose the CPL with the fewest unsatisfied references */
  81
  82                 int least_unsatisfied = INT_MAX;
  83
  84                 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls()) {
  85                         int unsatisfied = 0;
  86                         BOOST_FOREACH (shared_ptr<dcp::Reel> j, i->reels()) {
  87                                 if (j->main_picture() && !j->main_picture()->asset_ref().resolved()) {
  88                                         ++unsatisfied;
  89                                 }
  90                                 if (j->main_sound() && !j->main_sound()->asset_ref().resolved()) {
  91                                         ++unsatisfied;
  92                                 }
  93                                 if (j->main_subtitle() && !j->main_subtitle()->asset_ref().resolved()) {
  94                                         ++unsatisfied;
  95                                 }
  96                         }
  97
  98                         if (unsatisfied < least_unsatisfied) {
  99                                 least_unsatisfied = unsatisfied;
 100                                 cpl = i;
 101                         }
 102                 }
 103         }
 104
 105         if (!cpl) {
 106                 throw DCPError ("No CPLs found in DCP");
 107         }
 108
 109         _cpl = cpl->id ();
 110         _name = cpl->content_title_text ();
 111         _content_kind = cpl->content_kind ();
 112
 113         BOOST_FOREACH (shared_ptr<dcp::Reel> i, cpl->reels()) {
 114
 115                 if (i->main_picture ()) {
 116                         if (!i->main_picture()->asset_ref().resolved()) {
 117                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 118                                 _needs_assets = true;
 119                                 return;
 120                         }
 121
 122                         dcp::Fraction const frac = i->main_picture()->edit_rate ();
 123                         float const fr = float(frac.numerator) / frac.denominator;
 124                         if (!_video_frame_rate) {
 125                                 _video_frame_rate = fr;
 126                         } else if (_video_frame_rate.get() != fr) {
 127                                 throw DCPError (_("Mismatched frame rates in DCP"));
 128                         }
 129
 130                         _has_video = true;
 131                         shared_ptr<dcp::PictureAsset> asset = i->main_picture()->asset ();
 132                         if (!_video_size) {
 133                                 _video_size = asset->size ();
 134                         } else if (_video_size.get() != asset->size ()) {
 135                                 throw DCPError (_("Mismatched video sizes in DCP"));
 136                         }
 137
 138                         _video_length += i->main_picture()->duration();
 139                 }
 140
 141                 if (i->main_sound ()) {
 142                         if (!i->main_sound()->asset_ref().resolved()) {
 143                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 144                                 _needs_assets = true;
 145                                 return;
 146                         }
 147
 148                         _has_audio = true;
 149                         shared_ptr<dcp::SoundAsset> asset = i->main_sound()->asset ();
 150
 151                         if (!_audio_channels) {
 152                                 _audio_channels = asset->channels ();
 153                         } else if (_audio_channels.get() != asset->channels ()) {
 154                                 throw DCPError (_("Mismatched audio channel counts in DCP"));
 155                         }
 156
 157                         if (!_audio_frame_rate) {
 158                                 _audio_frame_rate = asset->sampling_rate ();
 159                         } else if (_audio_frame_rate.get() != asset->sampling_rate ()) {
 160                                 throw DCPError (_("Mismatched audio sample rates in DCP"));
 161                         }
 162
 163                         _audio_length += i->main_sound()->duration();
 164                 }
 165
 166                 if (i->main_subtitle ()) {
 167                         if (!i->main_subtitle()->asset_ref().resolved()) {
 168                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 169                                 _needs_assets = true;
 170                                 return;
 171                         }
 172
 173                         _has_text[TEXT_OPEN_SUBTITLE] = true;
 174                 }
 175
 176                 BOOST_FOREACH (shared_ptr<dcp::ReelClosedCaptionAsset> j, i->closed_captions()) {
 177                         if (!j->asset_ref().resolved()) {
 178                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 179                                 _needs_assets = true;
 180                                 return;
 181                         }
 182
 183                         _has_text[TEXT_CLOSED_CAPTION] = true;
 184                 }
 185
 186                 if (i->main_picture()) {
 187                         _reel_lengths.push_back (i->main_picture()->duration());
 188                 } else if (i->main_sound()) {
 189                         _reel_lengths.push_back (i->main_sound()->duration());
 190                 } else if (i->main_subtitle()) {
 191                         _reel_lengths.push_back (i->main_subtitle()->duration());
 192                 } else if (!i->closed_captions().empty()) {
 193                         _reel_lengths.push_back (i->closed_captions().front()->duration());
 194                 }
 195         }
 196
 197         _encrypted = cpl->encrypted ();
 198         _kdm_valid = true;
 199
 200         /* Check that we can read the first picture, sound and subtitle frames of each reel */
 201         try {
 202                 BOOST_FOREACH (shared_ptr<dcp::Reel> i, cpl->reels()) {
 203                         shared_ptr<dcp::PictureAsset> pic = i->main_picture()->asset ();
 204                         shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (pic);
 205                         shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (pic);
 206
 207                         if (mono) {
 208                                 mono->start_read()->get_frame(0)->xyz_image ();
 209                         } else {
 210                                 stereo->start_read()->get_frame(0)->xyz_image (dcp::EYE_LEFT);
 211                         }
 212
 213                         if (i->main_sound()) {
 214                                 shared_ptr<dcp::SoundAsset> sound = i->main_sound()->asset ();
 215                                 i->main_sound()->asset()->start_read()->get_frame(0);
 216                         }
 217
 218                         if (i->main_subtitle()) {
 219                                 i->main_subtitle()->asset()->subtitles ();
 220                         }
 221                 }
 222         } catch (dcp::DCPReadError& e) {
 223                 _kdm_valid = false;
 224         } catch (dcp::MiscError& e) {
 225                 _kdm_valid = false;
 226         }
 227
 228         DCPOMATIC_ASSERT (cpl->standard ());
 229         _standard = cpl->standard().get();
 230         _three_d = !cpl->reels().empty() && cpl->reels().front()->main_picture() &&
 231                 dynamic_pointer_cast<dcp::StereoPictureAsset> (cpl->reels().front()->main_picture()->asset());
 232
 233         _cpl = cpl->id ();
 234 }