src/lib/content_factory.cc

   1 /*
   2     Copyright (C) 2013-2016 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 /** @file  src/lib/content_factory.cc
  22  *  @brief Methods to create content objects.
  23  */
  24
  25 #include "ffmpeg_content.h"
  26 #include "audio_content.h"
  27 #include "image_content.h"
  28 #include "atmos_mxf_content.h"
  29 #include "string_text_file_content.h"
  30 #include "dcp_content.h"
  31 #include "dcp_subtitle_content.h"
  32 #include "util.h"
  33 #include "ffmpeg_audio_stream.h"
  34 #include "video_mxf_content.h"
  35 #include "film.h"
  36 #include "log_entry.h"
  37 #include "log.h"
  38 #include "compose.hpp"
  39 #include <libcxml/cxml.h>
  40 #include <dcp/smpte_subtitle_asset.h>
  41 #include <boost/algorithm/string.hpp>
  42
  43 #include "i18n.h"
  44
  45 using std::string;
  46 using std::list;
  47 using boost::shared_ptr;
  48 using boost::optional;
  49
  50 #define LOG_GENERAL(...) dcpomatic_log->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
  51
  52 /** Create a Content object from an XML node.
  53  *  @param node XML description.
  54  *  @param version XML state version.
  55  *  @param notes A list to which is added descriptions of any non-critial warnings / messages.
  56  *  @return Content object, or 0 if no content was recognised in the XML.
  57  */
  58 shared_ptr<Content>
  59 content_factory (shared_ptr<const Film> film, cxml::ConstNodePtr node, int version, list<string>& notes)
  60 {
  61         string const type = node->string_child ("Type");
  62
  63         boost::shared_ptr<Content> content;
  64
  65         if (type == "FFmpeg") {
  66                 /* SndfileContent is now handled by the FFmpeg code rather than by
  67                    separate libsndfile-based code.
  68                 */
  69                 content.reset (new FFmpegContent (node, version, notes));
  70         } else if (type == "Image") {
  71                 content.reset (new ImageContent (node, version));
  72         } else if (type == "Sndfile") {
  73                 /* SndfileContent is now handled by the FFmpeg code rather than by
  74                    separate libsndfile-based code.
  75                 */
  76                 content.reset (new FFmpegContent (node, version, notes));
  77
  78                 content->audio->set_stream (
  79                         AudioStreamPtr (
  80                                 new FFmpegAudioStream (
  81                                         "Stream", 0,
  82                                         node->number_child<int> ("AudioFrameRate"),
  83                                         node->number_child<Frame> ("AudioLength"),
  84                                         AudioMapping (node->node_child ("AudioMapping"), version)
  85                                         )
  86                                 )
  87                         );
  88
  89         } else if (type == "SubRip" || type == "TextSubtitle") {
  90                 content.reset (new StringTextFileContent (node, version));
  91         } else if (type == "DCP") {
  92                 content.reset (new DCPContent (node, version));
  93         } else if (type == "DCPSubtitle") {
  94                 content.reset (new DCPSubtitleContent (node, version));
  95         } else if (type == "VideoMXF") {
  96                 content.reset (new VideoMXFContent (node, version));
  97         } else if (type == "AtmosMXF") {
  98                 content.reset (new AtmosMXFContent (node, version));
  99         }
 100
 101         /* See if this content should be nudged to start on a video frame */
 102         DCPTime const old_pos = content->position();
 103         content->set_position(film, old_pos);
 104         if (old_pos != content->position()) {
 105                 string note = _("Your project contains video content that was not aligned to a frame boundary.");
 106                 note += "  ";
 107                 if (old_pos < content->position()) {
 108                         note += String::compose(
 109                                 _("The file %1 has been moved %2 milliseconds later."),
 110                                 content->path_summary(), DCPTime(content->position() - old_pos).seconds() * 1000
 111                                 );
 112                 } else {
 113                         note += String::compose(
 114                                 _("The file %1 has been moved %2 milliseconds earlier."),
 115                                 content->path_summary(), DCPTime(content->position() - old_pos).seconds() * 1000
 116                                 );
 117                 }
 118                 notes.push_back (note);
 119         }
 120
 121         /* ...or have a start trim which is an integer number of frames */
 122         ContentTime const old_trim = content->trim_start();
 123         content->set_trim_start(old_trim);
 124         if (old_trim != content->trim_start()) {
 125                 string note = _("Your project contains video content whose trim was not aligned to a frame boundary.");
 126                 note += "  ";
 127                 if (old_trim < content->trim_start()) {
 128                         note += String::compose(
 129                                 _("The file %1 has been trimmed by %2 milliseconds more."),
 130                                 content->path_summary(), ContentTime(content->trim_start() - old_trim).seconds() * 1000
 131                                 );
 132                 } else {
 133                         note += String::compose(
 134                                 _("The file %1 has been trimmed by %2 milliseconds less."),
 135                                 content->path_summary(), ContentTime(old_trim - content->trim_start()).seconds() * 1000
 136                                 );
 137                 }
 138                 notes.push_back (note);
 139         }
 140
 141         return content;
 142 }
 143
 144 /** Create some Content objects from a file or directory.
 145  *  @param path File or directory.
 146  *  @return Content objects.
 147  */
 148 list<shared_ptr<Content> >
 149 content_factory (boost::filesystem::path path)
 150 {
 151         list<shared_ptr<Content> > content;
 152
 153         if (boost::filesystem::is_directory (path)) {
 154
 155                 LOG_GENERAL ("Look in directory %1", path);
 156
 157                 if (boost::filesystem::is_empty (path)) {
 158                         return content;
 159                 }
 160
 161                 /* See if this is a set of images or a set of sound files */
 162
 163                 int image_files = 0;
 164                 int sound_files = 0;
 165                 int read = 0;
 166                 for (boost::filesystem::directory_iterator i(path); i != boost::filesystem::directory_iterator() && read < 10; ++i) {
 167
 168                         LOG_GENERAL ("Checking file %1", i->path());
 169
 170                         if (boost::starts_with (i->path().leaf().string(), ".")) {
 171                                 /* We ignore hidden files */
 172                                 LOG_GENERAL ("Ignored %1 (starts with .)", i->path());
 173                                 continue;
 174                         }
 175
 176                         if (!boost::filesystem::is_regular_file(i->path())) {
 177                                 /* Ignore things which aren't files (probably directories) */
 178                                 LOG_GENERAL ("Ignored %1 (not a regular file)", i->path());
 179                                 continue;
 180                         }
 181
 182                         if (valid_image_file (i->path ())) {
 183                                 ++image_files;
 184                         }
 185
 186                         if (valid_sound_file (i->path ())) {
 187                                 ++sound_files;
 188                         }
 189
 190                         ++read;
 191                 }
 192
 193                 if (image_files > 0 && sound_files == 0)  {
 194                         content.push_back (shared_ptr<Content> (new ImageContent(path)));
 195                 } else if (image_files == 0 && sound_files > 0) {
 196                         for (boost::filesystem::directory_iterator i(path); i != boost::filesystem::directory_iterator(); ++i) {
 197                                 content.push_back (shared_ptr<FFmpegContent> (new FFmpegContent(i->path())));
 198                         }
 199                 }
 200
 201         } else {
 202
 203                 shared_ptr<Content> single;
 204
 205                 string ext = path.extension().string ();
 206                 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
 207
 208                 if (valid_image_file (path)) {
 209                         single.reset (new ImageContent(path));
 210                 } else if (ext == ".srt" || ext == ".ssa" || ext == ".ass") {
 211                         single.reset (new StringTextFileContent(path));
 212                 } else if (ext == ".xml") {
 213                         cxml::Document doc;
 214                         doc.read_file (path);
 215                         if (doc.root_name() == "DCinemaSecurityMessage") {
 216                                 throw KDMAsContentError ();
 217                         }
 218                         single.reset (new DCPSubtitleContent(path));
 219                 } else if (ext == ".mxf" && dcp::SMPTESubtitleAsset::valid_mxf (path)) {
 220                         single.reset (new DCPSubtitleContent(path));
 221                 } else if (ext == ".mxf" && VideoMXFContent::valid_mxf (path)) {
 222                         single.reset (new VideoMXFContent(path));
 223                 } else if (ext == ".mxf" && AtmosMXFContent::valid_mxf (path)) {
 224                         single.reset (new AtmosMXFContent(path));
 225                 }
 226
 227                 if (!single) {
 228                         single.reset (new FFmpegContent(path));
 229                 }
 230
 231                 content.push_back (single);
 232         }
 233
 234         return content;
 235 }