src/dcp.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 #include <sstream>
  21 #include <fstream>
  22 #include <iomanip>
  23 #include <cassert>
  24 #include <boost/filesystem.hpp>
  25 #include "dcp.h"
  26 #include "asset.h"
  27 #include "sound_asset.h"
  28 #include "picture_asset.h"
  29 #include "util.h"
  30 #include "tags.h"
  31
  32 using namespace std;
  33 using namespace boost;
  34 using namespace libdcp;
  35
  36 /** Construct a DCP.
  37  *  @param d Directory to write files to.
  38  */
  39 DCP::DCP (string d, string n, ContentType c, int fps, int length)
  40         : _directory (d)
  41         , _name (n)
  42         , _content_type (c)
  43         , _fps (fps)
  44         , _length (length)
  45 {
  46         char buffer[64];
  47         time_t now;
  48         time (&now);
  49         struct tm* tm = localtime (&now);
  50         strftime (buffer, 64, "%Y-%m-%dT%I:%M:%S+00:00", tm);
  51         _date = string (buffer);
  52 }
  53
  54 void
  55 DCP::add_sound_asset (list<string> const & files)
  56 {
  57         filesystem::path p;
  58         p /= _directory;
  59         p /= "audio.mxf";
  60         _assets.push_back (shared_ptr<SoundAsset> (new SoundAsset (files, p.string(), _fps, _length)));
  61 }
  62
  63 void
  64 DCP::add_picture_asset (list<string> const & files, int w, int h)
  65 {
  66         filesystem::path p;
  67         p /= _directory;
  68         p /= "video.mxf";
  69         _assets.push_back (shared_ptr<PictureAsset> (new PictureAsset (files, p.string(), _fps, _length, w, h)));
  70 }
  71
  72 /** Write the required XML files to the directory that was
  73  *  passed into the constructor.
  74  */
  75 void
  76 DCP::write_xml () const
  77 {
  78         string cpl_uuid = make_uuid ();
  79         string cpl_path = write_cpl (cpl_uuid);
  80         int cpl_length = filesystem::file_size (cpl_path);
  81         string cpl_digest = make_digest (cpl_path);
  82
  83         string pkl_uuid = make_uuid ();
  84         string pkl_path = write_pkl (pkl_uuid, cpl_uuid, cpl_digest, cpl_length);
  85
  86         write_volindex ();
  87         write_assetmap (cpl_uuid, cpl_length, pkl_uuid, filesystem::file_size (pkl_path));
  88 }
  89
  90 /** Write the CPL file.
  91  *  @param cpl_uuid UUID to use.
  92  *  @return CPL pathname.
  93  */
  94 string
  95 DCP::write_cpl (string cpl_uuid) const
  96 {
  97         filesystem::path p;
  98         p /= _directory;
  99         stringstream s;
 100         s << cpl_uuid << "_cpl.xml";
 101         p /= s.str();
 102         ofstream cpl (p.string().c_str());
 103
 104         cpl << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 105             << "<CompositionPlaylist xmlns=\"http://www.smpte-ra.org/schemas/429-7/2006/CPL\">\n"
 106             << "  <Id>urn:uuid:" << cpl_uuid << "</Id>\n"
 107             << "  <AnnotationText>" << _name << "</AnnotationText>\n"
 108             << "  <IssueDate>" << _date << "</IssueDate>\n"
 109             << "  <Creator>libdcp " << Tags::instance()->creator << "</Creator>\n"
 110             << "  <ContentTitleText>" << _name << "</ContentTitleText>\n"
 111             << "  <ContentKind>" << _content_type << "</ContentKind>\n"
 112             << "  <ContentVersion>\n"
 113             << "    <Id>urn:uri:" << cpl_uuid << "_" << _date << "</Id>\n"
 114             << "    <LabelText>" << cpl_uuid << "_" << _date << "</LabelText>\n"
 115             << "  </ContentVersion>\n"
 116             << "  <RatingList/>\n"
 117             << "  <ReelList>\n";
 118
 119         cpl << "    <Reel>\n"
 120             << "      <Id>urn:uuid:" << make_uuid() << "</Id>\n"
 121             << "      <AssetList>\n";
 122
 123         for (list<shared_ptr<Asset> >::const_iterator i = _assets.begin(); i != _assets.end(); ++i) {
 124                 (*i)->write_to_cpl (cpl);
 125         }
 126
 127         cpl << "      </AssetList>\n"
 128             << "    </Reel>\n"
 129             << "  </ReelList>\n"
 130             << "</CompositionPlaylist>\n";
 131
 132         return p.string ();
 133 }
 134
 135 /** Write the PKL file.
 136  *  @param pkl_uuid UUID to use.
 137  *  @param cpl_uuid UUID of the CPL file.
 138  *  @param cpl_digest SHA digest of the CPL file.
 139  *  @param cpl_length Length of the CPL file in bytes.
 140  */
 141 std::string
 142 DCP::write_pkl (string pkl_uuid, string cpl_uuid, string cpl_digest, int cpl_length) const
 143 {
 144         filesystem::path p;
 145         p /= _directory;
 146         stringstream s;
 147         s << pkl_uuid << "_pkl.xml";
 148         p /= s.str();
 149         ofstream pkl (p.string().c_str());
 150
 151         pkl << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 152             << "<PackingList xmlns=\"http://www.smpte-ra.org/schemas/429-8/2007/PKL\">\n"
 153             << "  <Id>urn:uuid:" << pkl_uuid << "</Id>\n"
 154             << "  <AnnotationText>" << _name << "</AnnotationText>\n"
 155             << "  <IssueDate>" << _date << "</IssueDate>\n"
 156             << "  <Issuer>" << Tags::instance()->issuer << "</Issuer>\n"
 157             << "  <Creator>" << Tags::instance()->creator << "</Creator>\n"
 158             << "  <AssetList>\n";
 159
 160         for (list<shared_ptr<Asset> >::const_iterator i = _assets.begin(); i != _assets.end(); ++i) {
 161                 (*i)->write_to_pkl (pkl);
 162         }
 163
 164         pkl << "    <Asset>\n"
 165             << "      <Id>urn:uuid" << cpl_uuid << "</Id>\n"
 166             << "      <Hash>" << cpl_digest << "</Hash>\n"
 167             << "      <Size>" << cpl_length << "</Size>\n"
 168             << "      <Type>text/xml</Type>\n"
 169             << "    </Asset>\n";
 170
 171         pkl << "  </AssetList>\n"
 172             << "</PackingList>\n";
 173
 174         return p.string ();
 175 }
 176
 177 void
 178 DCP::write_volindex () const
 179 {
 180         filesystem::path p;
 181         p /= _directory;
 182         p /= "VOLINDEX.xml";
 183         ofstream vi (p.string().c_str());
 184
 185         vi << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 186            << "<VolumeIndex xmlns=\"http://www.smpte-ra.org/schemas/429-9/2007/AM\">\n"
 187            << "  <Index>1</Index>\n"
 188            << "</VolumeIndex>\n";
 189 }
 190
 191 void
 192 DCP::write_assetmap (string cpl_uuid, int cpl_length, string pkl_uuid, int pkl_length) const
 193 {
 194         filesystem::path p;
 195         p /= _directory;
 196         p /= "ASSETMAP.xml";
 197         ofstream am (p.string().c_str());
 198
 199         am << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 200            << "<AssetMap xmlns=\"http://www.smpte-ra.org/schemas/429-9/2007/AM\">\n"
 201            << "  <Id>urn:uuid:" << make_uuid() << "</Id>\n"
 202            << "  <Creator>" << Tags::instance()->creator << "</Creator>\n"
 203            << "  <VolumeCount>1</VolumeCount>\n"
 204            << "  <IssueDate>" << _date << "</IssueDate>\n"
 205            << "  <Issuer>" << Tags::instance()->issuer << "</Issuer>\n"
 206            << "  <AssetList>\n";
 207
 208         am << "    <Asset>\n"
 209            << "      <Id>urn:uuid:" << pkl_uuid << "</Id>\n"
 210            << "      <PackingList>true</PackingList>\n"
 211            << "      <ChunkList>\n"
 212            << "        <Chunk>\n"
 213            << "          <Path>" << pkl_uuid << "_pkl.xml</Path>\n"
 214            << "          <VolumeIndex>1</VolumeIndex>\n"
 215            << "          <Offset>0</Offset>\n"
 216            << "          <Length>" << pkl_length << "</Length>\n"
 217            << "        </Chunk>\n"
 218            << "      </ChunkList>\n"
 219            << "    </Asset>\n";
 220
 221         am << "    <Asset>\n"
 222            << "      <Id>urn:uuid:" << cpl_uuid << "</Id>\n"
 223            << "      <ChunkList>\n"
 224            << "        <Chunk>\n"
 225            << "          <Path>" << cpl_uuid << "_cpl.xml</Path>\n"
 226            << "          <VolumeIndex>1</VolumeIndex>\n"
 227            << "          <Offset>0</Offset>\n"
 228            << "          <Length>" << cpl_length << "</Length>\n"
 229            << "        </Chunk>\n"
 230            << "      </ChunkList>\n"
 231            << "    </Asset>\n";
 232
 233         for (list<shared_ptr<Asset> >::const_iterator i = _assets.begin(); i != _assets.end(); ++i) {
 234                 (*i)->write_to_assetmap (am);
 235         }
 236
 237         am << "  </AssetList>\n"
 238            << "</AssetMap>\n";
 239 }
 240
 241
 242 string
 243 DCP::content_type_string (ContentType t)
 244 {
 245         switch (t) {
 246         case FEATURE:
 247                 return "feature";
 248         case SHORT:
 249                 return "short";
 250         case TRAILER:
 251                 return "trailer";
 252         case TEST:
 253                 return "test";
 254         case TRANSITIONAL:
 255                 return "transitional";
 256         case RATING:
 257                 return "rating";
 258         case TEASER:
 259                 return "teaser";
 260         case POLICY:
 261                 return "policy";
 262         case PUBLIC_SERVICE_ANNOUNCEMENT:
 263                 return "psa";
 264         case ADVERTISEMENT:
 265                 return "advertisement";
 266         }
 267
 268         assert (false);
 269 }
 270