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