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/reel_subtitle_asset.h>
  39 #include <dcp/sound_asset.h>
  40 #include <boost/foreach.hpp>
  41 #include <iostream>
  42
  43 #include "i18n.h"
  44
  45 using std::list;
  46 using std::cout;
  47 using std::runtime_error;
  48 using boost::shared_ptr;
  49 using boost::dynamic_pointer_cast;
  50
  51 DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content)
  52         : DCP (content)
  53         , _video_length (0)
  54         , _audio_length (0)
  55         , _has_subtitles (false)
  56         , _encrypted (false)
  57         , _needs_assets (false)
  58         , _kdm_valid (false)
  59         , _three_d (false)
  60 {
  61         shared_ptr<dcp::CPL> cpl;
  62
  63         if (content->cpl ()) {
  64                 /* Use the CPL that the content was using before */
  65                 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls()) {
  66                         if (i->id() == content->cpl().get()) {
  67                                 cpl = i;
  68                         }
  69                 }
  70         } else {
  71                 /* Choose the CPL with the fewest unsatisfied references */
  72
  73                 int least_unsatisfied = INT_MAX;
  74
  75                 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls()) {
  76                         int unsatisfied = 0;
  77                         BOOST_FOREACH (shared_ptr<dcp::Reel> j, i->reels()) {
  78                                 if (j->main_picture() && !j->main_picture()->asset_ref().resolved()) {
  79                                         ++unsatisfied;
  80                                 }
  81                                 if (j->main_sound() && !j->main_sound()->asset_ref().resolved()) {
  82                                         ++unsatisfied;
  83                                 }
  84                                 if (j->main_subtitle() && !j->main_subtitle()->asset_ref().resolved()) {
  85                                         ++unsatisfied;
  86                                 }
  87                         }
  88
  89                         if (unsatisfied < least_unsatisfied) {
  90                                 least_unsatisfied = unsatisfied;
  91                                 cpl = i;
  92                         }
  93                 }
  94         }
  95
  96         if (!cpl) {
  97                 throw DCPError ("No CPLs found in DCP");
  98         }
  99
 100         _cpl = cpl->id ();
 101         _name = cpl->content_title_text ();
 102
 103         BOOST_FOREACH (shared_ptr<dcp::Reel> i, cpl->reels()) {
 104
 105                 if (i->main_picture ()) {
 106                         if (!i->main_picture()->asset_ref().resolved()) {
 107                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 108                                 _needs_assets = true;
 109                                 return;
 110                         }
 111
 112                         dcp::Fraction const frac = i->main_picture()->edit_rate ();
 113                         float const fr = float(frac.numerator) / frac.denominator;
 114                         if (!_video_frame_rate) {
 115                                 _video_frame_rate = fr;
 116                         } else if (_video_frame_rate.get() != fr) {
 117                                 throw DCPError (_("Mismatched frame rates in DCP"));
 118                         }
 119
 120                         shared_ptr<dcp::PictureAsset> asset = i->main_picture()->asset ();
 121                         if (!_video_size) {
 122                                 _video_size = asset->size ();
 123                         } else if (_video_size.get() != asset->size ()) {
 124                                 throw DCPError (_("Mismatched video sizes in DCP"));
 125                         }
 126
 127                         _video_length += i->main_picture()->duration();
 128                 }
 129
 130                 if (i->main_sound ()) {
 131                         if (!i->main_sound()->asset_ref().resolved()) {
 132                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 133                                 _needs_assets = true;
 134                                 return;
 135                         }
 136
 137                         shared_ptr<dcp::SoundAsset> asset = i->main_sound()->asset ();
 138
 139                         if (!_audio_channels) {
 140                                 _audio_channels = asset->channels ();
 141                         } else if (_audio_channels.get() != asset->channels ()) {
 142                                 throw DCPError (_("Mismatched audio channel counts in DCP"));
 143                         }
 144
 145                         if (!_audio_frame_rate) {
 146                                 _audio_frame_rate = asset->sampling_rate ();
 147                         } else if (_audio_frame_rate.get() != asset->sampling_rate ()) {
 148                                 throw DCPError (_("Mismatched audio sample rates in DCP"));
 149                         }
 150
 151                         _audio_length += i->main_sound()->duration();
 152                 }
 153
 154                 if (i->main_subtitle ()) {
 155                         if (!i->main_subtitle()->asset_ref().resolved()) {
 156                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 157                                 _needs_assets = true;
 158                                 return;
 159                         }
 160
 161                         _has_subtitles = true;
 162                 }
 163         }
 164
 165         _encrypted = cpl->encrypted ();
 166         _kdm_valid = true;
 167
 168         /* Check that we can read the first picture frame */
 169         try {
 170                 if (!cpl->reels().empty ()) {
 171                         shared_ptr<dcp::PictureAsset> asset = cpl->reels().front()->main_picture()->asset ();
 172                         shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
 173                         shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
 174
 175                         if (mono) {
 176                                 mono->start_read()->get_frame(0)->xyz_image ();
 177                         } else {
 178                                 stereo->start_read()->get_frame(0)->xyz_image (dcp::EYE_LEFT);
 179                         }
 180
 181                 }
 182         } catch (dcp::DCPReadError& e) {
 183                 _kdm_valid = false;
 184                 if (_encrypted && content->kdm ()) {
 185                         /* XXX: maybe don't use an exception for this */
 186                         throw runtime_error (_("The KDM does not decrypt the DCP.  Perhaps it is targeted at the wrong CPL."));
 187                 }
 188         }
 189
 190         DCPOMATIC_ASSERT (cpl->standard ());
 191         _standard = cpl->standard().get();
 192         _three_d = !cpl->reels().empty() && cpl->reels().front()->main_picture() &&
 193                 dynamic_pointer_cast<dcp::StereoPictureAsset> (cpl->reels().front()->main_picture()->asset());
 194
 195         _cpl = cpl->id ();
 196 }