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         , _captions (0)
  62         , _encrypted (false)
  63         , _needs_assets (false)
  64         , _kdm_valid (false)
  65         , _three_d (false)
  66 {
  67         shared_ptr<dcp::CPL> cpl;
  68
  69         if (content->cpl ()) {
  70                 /* Use the CPL that the content was using before */
  71                 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls()) {
  72                         if (i->id() == content->cpl().get()) {
  73                                 cpl = i;
  74                         }
  75                 }
  76         } else {
  77                 /* Choose the CPL with the fewest unsatisfied references */
  78
  79                 int least_unsatisfied = INT_MAX;
  80
  81                 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls()) {
  82                         int unsatisfied = 0;
  83                         BOOST_FOREACH (shared_ptr<dcp::Reel> j, i->reels()) {
  84                                 if (j->main_picture() && !j->main_picture()->asset_ref().resolved()) {
  85                                         ++unsatisfied;
  86                                 }
  87                                 if (j->main_sound() && !j->main_sound()->asset_ref().resolved()) {
  88                                         ++unsatisfied;
  89                                 }
  90                                 if (j->main_subtitle() && !j->main_subtitle()->asset_ref().resolved()) {
  91                                         ++unsatisfied;
  92                                 }
  93                         }
  94
  95                         if (unsatisfied < least_unsatisfied) {
  96                                 least_unsatisfied = unsatisfied;
  97                                 cpl = i;
  98                         }
  99                 }
 100         }
 101
 102         if (!cpl) {
 103                 throw DCPError ("No CPLs found in DCP");
 104         }
 105
 106         _cpl = cpl->id ();
 107         _name = cpl->content_title_text ();
 108
 109         BOOST_FOREACH (shared_ptr<dcp::Reel> i, cpl->reels()) {
 110
 111                 if (i->main_picture ()) {
 112                         if (!i->main_picture()->asset_ref().resolved()) {
 113                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 114                                 _needs_assets = true;
 115                                 return;
 116                         }
 117
 118                         dcp::Fraction const frac = i->main_picture()->edit_rate ();
 119                         float const fr = float(frac.numerator) / frac.denominator;
 120                         if (!_video_frame_rate) {
 121                                 _video_frame_rate = fr;
 122                         } else if (_video_frame_rate.get() != fr) {
 123                                 throw DCPError (_("Mismatched frame rates in DCP"));
 124                         }
 125
 126                         _has_video = true;
 127                         shared_ptr<dcp::PictureAsset> asset = i->main_picture()->asset ();
 128                         if (!_video_size) {
 129                                 _video_size = asset->size ();
 130                         } else if (_video_size.get() != asset->size ()) {
 131                                 throw DCPError (_("Mismatched video sizes in DCP"));
 132                         }
 133
 134                         _video_length += i->main_picture()->duration();
 135                 }
 136
 137                 if (i->main_sound ()) {
 138                         if (!i->main_sound()->asset_ref().resolved()) {
 139                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 140                                 _needs_assets = true;
 141                                 return;
 142                         }
 143
 144                         _has_audio = true;
 145                         shared_ptr<dcp::SoundAsset> asset = i->main_sound()->asset ();
 146
 147                         if (!_audio_channels) {
 148                                 _audio_channels = asset->channels ();
 149                         } else if (_audio_channels.get() != asset->channels ()) {
 150                                 throw DCPError (_("Mismatched audio channel counts in DCP"));
 151                         }
 152
 153                         if (!_audio_frame_rate) {
 154                                 _audio_frame_rate = asset->sampling_rate ();
 155                         } else if (_audio_frame_rate.get() != asset->sampling_rate ()) {
 156                                 throw DCPError (_("Mismatched audio sample rates in DCP"));
 157                         }
 158
 159                         _audio_length += i->main_sound()->duration();
 160                 }
 161
 162                 if (i->main_subtitle ()) {
 163                         if (!i->main_subtitle()->asset_ref().resolved()) {
 164                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 165                                 _needs_assets = true;
 166                                 return;
 167                         }
 168
 169                         ++_captions;
 170                 }
 171
 172                 if (i->closed_caption ()) {
 173                         if (!i->closed_caption()->asset_ref().resolved()) {
 174                                 /* We are missing this asset so we can't continue; examination will be repeated later */
 175                                 _needs_assets = true;
 176                                 return;
 177                         }
 178
 179                         ++_captions;
 180                 }
 181
 182                 if (i->main_picture()) {
 183                         _reel_lengths.push_back (i->main_picture()->duration());
 184                 } else if (i->main_sound()) {
 185                         _reel_lengths.push_back (i->main_sound()->duration());
 186                 } else if (i->main_subtitle()) {
 187                         _reel_lengths.push_back (i->main_subtitle()->duration());
 188                 } else if (i->closed_caption()) {
 189                         _reel_lengths.push_back (i->closed_caption()->duration());
 190                 }
 191         }
 192
 193         _encrypted = cpl->encrypted ();
 194         _kdm_valid = true;
 195
 196         /* Check that we can read the first picture, sound and subtitle frames of each reel */
 197         try {
 198                 BOOST_FOREACH (shared_ptr<dcp::Reel> i, cpl->reels()) {
 199                         shared_ptr<dcp::PictureAsset> pic = i->main_picture()->asset ();
 200                         shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (pic);
 201                         shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (pic);
 202
 203                         if (mono) {
 204                                 mono->start_read()->get_frame(0)->xyz_image ();
 205                         } else {
 206                                 stereo->start_read()->get_frame(0)->xyz_image (dcp::EYE_LEFT);
 207                         }
 208
 209                         if (i->main_sound()) {
 210                                 shared_ptr<dcp::SoundAsset> sound = i->main_sound()->asset ();
 211                                 i->main_sound()->asset()->start_read()->get_frame(0);
 212                         }
 213
 214                         if (i->main_subtitle()) {
 215                                 i->main_subtitle()->asset()->subtitles ();
 216                         }
 217                 }
 218         } catch (dcp::DCPReadError& e) {
 219                 _kdm_valid = false;
 220         } catch (dcp::MiscError& e) {
 221                 _kdm_valid = false;
 222         }
 223
 224         DCPOMATIC_ASSERT (cpl->standard ());
 225         _standard = cpl->standard().get();
 226         _three_d = !cpl->reels().empty() && cpl->reels().front()->main_picture() &&
 227                 dynamic_pointer_cast<dcp::StereoPictureAsset> (cpl->reels().front()->main_picture()->asset());
 228
 229         _cpl = cpl->id ();
 230 }