git.sesse.net Git - vlc/blob - modules/meta_engine/taglib.cpp

   1 /*****************************************************************************
   2  * taglib.cpp: Taglib tag parser/writer
   3  *****************************************************************************
   4  * Copyright (C) 2003-2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23 #include <vlc/vlc.h>
  24 #include <vlc_playlist.h>
  25 #include <vlc_meta.h>
  26 #include <vlc_demux.h>
  27
  28 #include <fileref.h>
  29 #include <tag.h>
  30 #include <id3v2tag.h>
  31 #include <mpegfile.h>
  32 #include <flacfile.h>
  33 #include <uniquefileidentifierframe.h>
  34 #if 0 //for artist and album id
  35 #include <textidentificationframe.h>
  36 #endif
  37
  38 static int  ReadMeta    ( vlc_object_t * );
  39 static int  DownloadArt ( vlc_object_t * );
  40 static int  WriteMeta   ( vlc_object_t * );
  41
  42 vlc_module_begin();
  43     set_capability( "meta reader", 1000 );
  44     set_callbacks( ReadMeta, NULL );
  45     add_submodule();
  46         set_capability( "art downloader", 50 );
  47         set_callbacks( DownloadArt, NULL );
  48     add_submodule();
  49         set_capability( "meta writer", 50 );
  50         set_callbacks( WriteMeta, NULL );
  51 vlc_module_end();
  52
  53 static bool checkID3Image( const TagLib::ID3v2::Tag *tag )
  54 {
  55     TagLib::ID3v2::FrameList l = tag->frameListMap()[ "APIC" ];
  56     return !l.isEmpty();
  57 }
  58
  59 /* Try detecting embedded art */
  60 static void DetectImage( TagLib::FileRef f, vlc_meta_t *p_meta )
  61 {
  62     if( TagLib::MPEG::File *mpeg =
  63                dynamic_cast<TagLib::MPEG::File *>(f.file() ) )
  64     {
  65         if( mpeg->ID3v2Tag() && checkID3Image( mpeg->ID3v2Tag() ) )
  66             vlc_meta_SetArtURL( p_meta, "APIC" );
  67     }
  68     else if( TagLib::FLAC::File *flac =
  69              dynamic_cast<TagLib::FLAC::File *>(f.file() ) )
  70     {
  71         if( flac->ID3v2Tag() && checkID3Image( flac->ID3v2Tag() ) )
  72             vlc_meta_SetArtURL( p_meta, "APIC" );
  73     }
  74 #if 0
  75 /* This needs special additions to taglib */
  76  * else if( TagLib::MP4::File *mp4 =
  77                dynamic_cast<TagLib::MP4::File *>( f.file() ) )
  78     {
  79         TagLib::MP4::Tag *mp4tag =
  80                 dynamic_cast<TagLib::MP4::Tag *>( mp4->tag() );
  81         if( mp4tag && mp4tag->cover().size() )
  82             vlc_meta_SetArtURL( p_meta, "MP4C" );
  83     }
  84 #endif
  85 }
  86
  87 static int ReadMeta( vlc_object_t *p_this )
  88 {
  89     demux_t *p_demux = (demux_t *)p_this;
  90
  91     if( !strncmp( p_demux->psz_access, "file", 4 ) )
  92     {
  93         if( !p_demux->p_private )
  94             p_demux->p_private = (void*)vlc_meta_New();
  95         TagLib::FileRef f( p_demux->psz_path );
  96         if( !f.isNull() && f.tag() && !f.tag()->isEmpty() )
  97         {
  98             TagLib::Tag *tag = f.tag();
  99             vlc_meta_t *p_meta = (vlc_meta_t *)(p_demux->p_private );
 100
 101 #define SET( foo, bar ) vlc_meta_Set##foo( p_meta, tag->bar ().toCString(true))
 102             SET( Title, title );
 103             SET( Artist, artist );
 104             SET( Album, album );
 105 //            SET( Comment, comment );
 106             SET( Genre, genre );
 107 //            SET( Year, year ); Gra, this is an int, need to convert
 108 //            SET( Tracknum , track ); Same
 109 #undef SET
 110
 111             if( TagLib::MPEG::File *p_mpeg =
 112                 dynamic_cast<TagLib::MPEG::File *>(f.file() ) )
 113             {
 114                 if( p_mpeg->ID3v2Tag() )
 115                 {
 116                     TagLib::ID3v2::Tag *tag = p_mpeg->ID3v2Tag();
 117                     TagLib::ID3v2::FrameList list = tag->frameListMap()["UFID"];
 118                     TagLib::ID3v2::UniqueFileIdentifierFrame* p_ufid;
 119                     for( TagLib::ID3v2::FrameList::Iterator iter = list.begin();
 120                             iter != list.end(); iter++ )
 121                     {
 122                         p_ufid = dynamic_cast<TagLib::ID3v2::UniqueFileIdentifierFrame*>(*iter);
 123                         const char *owner = p_ufid->owner().toCString();
 124                         if (!strcmp( owner, "http://musicbrainz.org" ))
 125                         {
 126                             /* ID3v2 UFID contains up to 64 bytes binary data
 127                              * but in our case it will be a '\0'
 128                              * terminated string */
 129                             char *psz_ufid = (char*) malloc( 64 );
 130                             int j = 0;
 131                             while( ( j < 63 ) &&
 132                                     ( j < p_ufid->identifier().size() ) )
 133                                 psz_ufid[j] = p_ufid->identifier()[j++];
 134                             psz_ufid[j] = '\0';
 135                             vlc_meta_SetTrackID( p_meta, psz_ufid );
 136                             free( psz_ufid );
 137                         }
 138                     }
 139                     /* musicbrainz artist and album id: not useful yet */
 140 #if 0
 141                     list = tag->frameListMap()["TXXX"];
 142                     TagLib::ID3v2::UserTextIdentificationFrame* p_txxx;
 143                     for( TagLib::ID3v2::FrameList::Iterator iter = list.begin();
 144                             iter != list.end(); iter++ )
 145                     {
 146                         p_txxx = dynamic_cast<TagLib::ID3v2::UserTextIdentificationFrame*>(*iter);
 147                         const char *psz_desc= p_txxx->description().toCString();
 148                         if( !strncmp( psz_desc, "MusicBrainz Artist Id", 21 ) )
 149                             vlc_meta_SetArtistID( p_meta,
 150                                     p_txxx->fieldList().toString().toCString());
 151                         if( !strncmp( psz_desc, "MusicBrainz Album Id", 20 ) )
 152                             vlc_meta_SetAlbumID( p_meta,
 153                                     p_txxx->fieldList().toString().toCString());
 154                     }
 155 #endif
 156                 }
 157             }
 158
 159             DetectImage( f, p_meta );
 160
 161             return VLC_SUCCESS;
 162         }
 163     }
 164     return VLC_EGENERIC;
 165 }
 166
 167 static int WriteMeta( vlc_object_t *p_this )
 168 {
 169     playlist_t *p_playlist = (playlist_t *)p_this;
 170     meta_export_t *p_export = (meta_export_t *)p_playlist->p_private;
 171     input_item_t *p_item = p_export->p_item;
 172
 173     TagLib::FileRef f( p_export->psz_file );
 174     if( !f.isNull() && f.tag() )
 175     {
 176         TagLib::Tag *tag = f.tag();
 177         tag->setArtist( p_item->p_meta->psz_artist );
 178         f.save();
 179         return VLC_SUCCESS;
 180     }
 181     return VLC_EGENERIC;
 182 }
 183
 184 static int DownloadArt( vlc_object_t *p_this )
 185 {
 186     /* We need to be passed the file name
 187      * Fetch the thing from the file, save it to the cache folder
 188      */
 189     return VLC_EGENERIC;
 190 }