src/stereo_picture_asset.cc

   1 /*
   2     Copyright (C) 2012-2013 Carl Hetherington <cth@carlh.net>
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include "AS_DCP.h"
  21 #include "stereo_picture_asset.h"
  22 #include "stereo_picture_frame.h"
  23 #include "exceptions.h"
  24 #include "stereo_picture_asset_writer.h"
  25
  26 using std::string;
  27 using std::pair;
  28 using std::make_pair;
  29 using boost::shared_ptr;
  30 using boost::dynamic_pointer_cast;
  31 using namespace libdcp;
  32
  33 bool
  34 StereoPictureAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, boost::function<void (NoteType, string)> note) const
  35 {
  36         if (!PictureAsset::equals (other, opt, note)) {
  37                 return false;
  38         }
  39
  40         shared_ptr<const StereoPictureAsset> other_picture = dynamic_pointer_cast<const StereoPictureAsset> (other);
  41         assert (other_picture);
  42
  43         for (int i = 0; i < _intrinsic_duration; ++i) {
  44                 shared_ptr<const StereoPictureFrame> frame_A = get_frame (i);
  45                 shared_ptr<const StereoPictureFrame> frame_B = other_picture->get_frame (i);
  46
  47                 if (!frame_buffer_equals (
  48                             i, opt, note,
  49                             frame_A->left_j2k_data(), frame_A->left_j2k_size(),
  50                             frame_B->left_j2k_data(), frame_B->left_j2k_size()
  51                             )) {
  52                         return false;
  53                 }
  54
  55                 if (!frame_buffer_equals (
  56                             i, opt, note,
  57                             frame_A->right_j2k_data(), frame_A->right_j2k_size(),
  58                             frame_B->right_j2k_data(), frame_B->right_j2k_size()
  59                             )) {
  60                         return false;
  61                 }
  62         }
  63
  64         return true;
  65 }
  66
  67 StereoPictureAsset::StereoPictureAsset (boost::filesystem::path directory, string mxf_name)
  68         : PictureAsset (directory, mxf_name)
  69 {
  70
  71 }
  72
  73 void
  74 StereoPictureAsset::read ()
  75 {
  76         ASDCP::JP2K::MXFSReader reader;
  77         if (ASDCP_FAILURE (reader.OpenRead (path().string().c_str()))) {
  78                 boost::throw_exception (MXFFileError ("could not open MXF file for reading", path().string()));
  79         }
  80
  81         ASDCP::JP2K::PictureDescriptor desc;
  82         if (ASDCP_FAILURE (reader.FillPictureDescriptor (desc))) {
  83                 boost::throw_exception (DCPReadError ("could not read video MXF information"));
  84         }
  85
  86         _size.width = desc.StoredWidth;
  87         _size.height = desc.StoredHeight;
  88 }
  89
  90 shared_ptr<const StereoPictureFrame>
  91 StereoPictureAsset::get_frame (int n) const
  92 {
  93         return shared_ptr<const StereoPictureFrame> (new StereoPictureFrame (path().string(), n));
  94 }
  95
  96 shared_ptr<PictureAssetWriter>
  97 StereoPictureAsset::start_write (bool overwrite)
  98 {
  99         return shared_ptr<StereoPictureAssetWriter> (new StereoPictureAssetWriter (this, overwrite));
 100 }
 101
 102 string
 103 StereoPictureAsset::cpl_node_name () const
 104 {
 105         return "msp-cpl:MainStereoscopicPicture";
 106 }
 107
 108 pair<string, string>
 109 StereoPictureAsset::cpl_node_attribute (bool interop) const
 110 {
 111         if (interop) {
 112                 return make_pair ("xmlns:msp-cpl", "http://www.digicine.com/schemas/437-Y/2007/Main-Stereo-Picture-CPL");
 113         } else {
 114                 return make_pair ("xmlns:msp-cpl", "http://www.smpte-ra.org/schemas/429-10/2008/Main-Stereo-Picture-CPL");
 115         }
 116
 117         return make_pair ("", "");
 118 }
 119
 120 int
 121 StereoPictureAsset::edit_rate_factor () const
 122 {
 123         return 2;
 124 }