src/asset.cc

   1 /*
   2     Copyright (C) 2012 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 /** @file  src/asset.cc
  21  *  @brief Parent class for assets of DCPs.
  22  */
  23
  24 #include <iostream>
  25 #include <fstream>
  26 #include <boost/filesystem.hpp>
  27 #include "AS_DCP.h"
  28 #include "KM_util.h"
  29 #include "asset.h"
  30 #include "util.h"
  31 #include "metadata.h"
  32
  33 using namespace std;
  34 using namespace boost;
  35 using namespace libdcp;
  36
  37 Asset::Asset (string directory, string mxf_name, sigc::signal1<void, float>* progress, int fps, int length)
  38         : _directory (directory)
  39         , _mxf_name (mxf_name)
  40         , _progress (progress)
  41         , _fps (fps)
  42         , _length (length)
  43         , _uuid (make_uuid ())
  44 {
  45
  46 }
  47
  48 void
  49 Asset::write_to_pkl (ostream& s) const
  50 {
  51         s << "    <Asset>\n"
  52           << "      <Id>urn:uuid:" << _uuid << "</Id>\n"
  53           << "      <AnnotationText>" << _mxf_name << "</AnnotationText>\n"
  54           << "      <Hash>" << _digest << "</Hash>\n"
  55           << "      <Size>" << filesystem::file_size(mxf_path()) << "</Size>\n"
  56           << "      <Type>application/mxf</Type>\n"
  57           << "    </Asset>\n";
  58 }
  59
  60 void
  61 Asset::write_to_assetmap (ostream& s) const
  62 {
  63         s << "    <Asset>\n"
  64           << "      <Id>urn:uuid:" << _uuid << "</Id>\n"
  65           << "      <ChunkList>\n"
  66           << "        <Chunk>\n"
  67           << "          <Path>" << _mxf_name << "</Path>\n"
  68           << "          <VolumeIndex>1</VolumeIndex>\n"
  69           << "          <Offset>0</Offset>\n"
  70           << "          <Length>" << filesystem::file_size(mxf_path()) << "</Length>\n"
  71           << "        </Chunk>\n"
  72           << "      </ChunkList>\n"
  73           << "    </Asset>\n";
  74 }
  75
  76 void
  77 Asset::fill_writer_info (ASDCP::WriterInfo* writer_info) const
  78 {
  79         writer_info->ProductVersion = Metadata::instance()->product_version;
  80         writer_info->CompanyName = Metadata::instance()->company_name;
  81         writer_info->ProductName = Metadata::instance()->product_name.c_str();
  82
  83         writer_info->LabelSetType = ASDCP::LS_MXF_SMPTE;
  84         unsigned int c;
  85         Kumu::hex2bin (_uuid.c_str(), writer_info->AssetUUID, Kumu::UUID_Length, &c);
  86         assert (c == Kumu::UUID_Length);
  87 }
  88
  89 filesystem::path
  90 Asset::mxf_path () const
  91 {
  92         filesystem::path p;
  93         p /= _directory;
  94         p /= _mxf_name;
  95         return p;
  96 }
  97
  98 list<string>
  99 Asset::equals (Asset const & other, EqualityFlags flags) const
 100 {
 101         list<string> notes;
 102
 103         switch (flags) {
 104         case LIBDCP_METADATA:
 105                 break;
 106         case MXF_BITWISE:
 107                 if (filesystem::file_size (mxf_path()) != filesystem::file_size (other.mxf_path())) {
 108                         notes.push_back (mxf_path().string() + " and " + other.mxf_path().string() + " sizes differ");
 109                         return notes;
 110                 }
 111
 112                 ifstream a (mxf_path().c_str(), ios::binary);
 113                 ifstream b (other.mxf_path().c_str(), ios::binary);
 114
 115                 int buffer_size = 65536;
 116                 char abuffer[buffer_size];
 117                 char bbuffer[buffer_size];
 118
 119                 int n = filesystem::file_size (mxf_path ());
 120
 121                 while (n) {
 122                         int const t = min (n, buffer_size);
 123                         a.read (abuffer, t);
 124                         b.read (bbuffer, t);
 125
 126                         for (int i = 0; i < t; ++i) {
 127                                 if (abuffer[i] != bbuffer[i]) {
 128                                         notes.push_back (mxf_path().string() + " and " + other.mxf_path().string() + " content differs");
 129                                         return notes;
 130                                 }
 131                         }
 132
 133                         n -= t;
 134                 }
 135         }
 136
 137         return notes;
 138 }