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 < CAPTION_COUNT; ++i) {
  69                 _has_caption[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
 112         BOOST_FOREACH (shared_ptr<dcp::Reel> i, cpl->reels()) {
 113
 114                 if (i->main_picture ()) {
 115                         if (!i->main_picture()->asset_ref().resolved()) {
 116                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 117                                 _needs_assets = true;
 118                                 return;
 119                         }
 120
 121                         dcp::Fraction const frac = i->main_picture()->edit_rate ();
 122                         float const fr = float(frac.numerator) / frac.denominator;
 123                         if (!_video_frame_rate) {
 124                                 _video_frame_rate = fr;
 125                         } else if (_video_frame_rate.get() != fr) {
 126                                 throw DCPError (_("Mismatched frame rates in DCP"));
 127                         }
 128
 129                         _has_video = true;
 130                         shared_ptr<dcp::PictureAsset> asset = i->main_picture()->asset ();
 131                         if (!_video_size) {
 132                                 _video_size = asset->size ();
 133                         } else if (_video_size.get() != asset->size ()) {
 134                                 throw DCPError (_("Mismatched video sizes in DCP"));
 135                         }
 136
 137                         _video_length += i->main_picture()->duration();
 138                 }
 139
 140                 if (i->main_sound ()) {
 141                         if (!i->main_sound()->asset_ref().resolved()) {
 142                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 143                                 _needs_assets = true;
 144                                 return;
 145                         }
 146
 147                         _has_audio = true;
 148                         shared_ptr<dcp::SoundAsset> asset = i->main_sound()->asset ();
 149
 150                         if (!_audio_channels) {
 151                                 _audio_channels = asset->channels ();
 152                         } else if (_audio_channels.get() != asset->channels ()) {
 153                                 throw DCPError (_("Mismatched audio channel counts in DCP"));
 154                         }
 155
 156                         if (!_audio_frame_rate) {
 157                                 _audio_frame_rate = asset->sampling_rate ();
 158                         } else if (_audio_frame_rate.get() != asset->sampling_rate ()) {
 159                                 throw DCPError (_("Mismatched audio sample rates in DCP"));
 160                         }
 161
 162                         _audio_length += i->main_sound()->duration();
 163                 }
 164
 165                 if (i->main_subtitle ()) {
 166                         if (!i->main_subtitle()->asset_ref().resolved()) {
 167                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 168                                 _needs_assets = true;
 169                                 return;
 170                         }
 171
 172                         _has_caption[CAPTION_OPEN] = true;
 173                 }
 174
 175                 if (i->closed_caption ()) {
 176                         if (!i->closed_caption()->asset_ref().resolved()) {
 177                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 178                                 _needs_assets = true;
 179                                 return;
 180                         }
 181
 182                         _has_caption[CAPTION_CLOSED] = true;
 183                 }
 184
 185                 if (i->main_picture()) {
 186                         _reel_lengths.push_back (i->main_picture()->duration());
 187                 } else if (i->main_sound()) {
 188                         _reel_lengths.push_back (i->main_sound()->duration());
 189                 } else if (i->main_subtitle()) {
 190                         _reel_lengths.push_back (i->main_subtitle()->duration());
 191                 } else if (i->closed_caption()) {
 192                         _reel_lengths.push_back (i->closed_caption()->duration());
 193                 }
 194         }
 195
 196         _encrypted = cpl->encrypted ();
 197         _kdm_valid = true;
 198
 199         /* Check that we can read the first picture, sound and subtitle frames of each reel */
 200         try {
 201                 BOOST_FOREACH (shared_ptr<dcp::Reel> i, cpl->reels()) {
 202                         shared_ptr<dcp::PictureAsset> pic = i->main_picture()->asset ();
 203                         shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (pic);
 204                         shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (pic);
 205
 206                         if (mono) {
 207                                 mono->start_read()->get_frame(0)->xyz_image ();
 208                         } else {
 209                                 stereo->start_read()->get_frame(0)->xyz_image (dcp::EYE_LEFT);
 210                         }
 211
 212                         if (i->main_sound()) {
 213                                 shared_ptr<dcp::SoundAsset> sound = i->main_sound()->asset ();
 214                                 i->main_sound()->asset()->start_read()->get_frame(0);
 215                         }
 216
 217                         if (i->main_subtitle()) {
 218                                 i->main_subtitle()->asset()->subtitles ();
 219                         }
 220                 }
 221         } catch (dcp::DCPReadError& e) {
 222                 _kdm_valid = false;
 223         } catch (dcp::MiscError& e) {
 224                 _kdm_valid = false;
 225         }
 226
 227         DCPOMATIC_ASSERT (cpl->standard ());
 228         _standard = cpl->standard().get();
 229         _three_d = !cpl->reels().empty() && cpl->reels().front()->main_picture() &&
 230                 dynamic_pointer_cast<dcp::StereoPictureAsset> (cpl->reels().front()->main_picture()->asset());
 231
 232         _cpl = cpl->id ();
 233 }