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/input.h>
  26 #include <vlc_meta.h>
  27
  28 #include <fileref.h>
  29 #include <tag.h>
  30 #include <id3v2tag.h>
  31 #include <mpegfile.h>
  32 #include <flacfile.h>
  33 #include <vorbisfile.h>
  34 #include <uniquefileidentifierframe.h>
  35 #if 0 //for artist and album id
  36 #include <textidentificationframe.h>
  37 #endif
  38
  39 static int  ReadMeta    ( vlc_object_t * );
  40 static int  DownloadArt ( vlc_object_t * );
  41 static int  WriteMeta   ( vlc_object_t * );
  42
  43 vlc_module_begin();
  44     set_capability( "meta reader", 1000 );
  45     set_callbacks( ReadMeta, NULL );
  46     add_submodule();
  47         set_capability( "art downloader", 50 );
  48         set_callbacks( DownloadArt, NULL );
  49     add_submodule();
  50         set_capability( "meta writer", 50 );
  51         set_callbacks( WriteMeta, NULL );
  52 vlc_module_end();
  53
  54 static bool checkID3Image( const TagLib::ID3v2::Tag *tag )
  55 {
  56     TagLib::ID3v2::FrameList l = tag->frameListMap()[ "APIC" ];
  57     return !l.isEmpty();
  58 }
  59
  60 /* Try detecting embedded art */
  61 static void DetectImage( TagLib::FileRef f, vlc_meta_t *p_meta )
  62 {
  63     if( TagLib::MPEG::File *mpeg =
  64                dynamic_cast<TagLib::MPEG::File *>(f.file() ) )
  65     {
  66         if( mpeg->ID3v2Tag() && checkID3Image( mpeg->ID3v2Tag() ) )
  67             vlc_meta_SetArtURL( p_meta, "APIC" );
  68     }
  69     else if( TagLib::FLAC::File *flac =
  70              dynamic_cast<TagLib::FLAC::File *>(f.file() ) )
  71     {
  72         if( flac->ID3v2Tag() && checkID3Image( flac->ID3v2Tag() ) )
  73             vlc_meta_SetArtURL( p_meta, "APIC" );
  74     }
  75 #if 0
  76 /* This needs special additions to taglib */
  77  * else if( TagLib::MP4::File *mp4 =
  78                dynamic_cast<TagLib::MP4::File *>( f.file() ) )
  79     {
  80         TagLib::MP4::Tag *mp4tag =
  81                 dynamic_cast<TagLib::MP4::Tag *>( mp4->tag() );
  82         if( mp4tag && mp4tag->cover().size() )
  83             vlc_meta_SetArtURL( p_meta, "MP4C" );
  84     }
  85 #endif
  86 }
  87
  88 static int ReadMeta( vlc_object_t *p_this )
  89 {
  90     demux_t *p_demux = (demux_t *)p_this;
  91
  92     if( !strncmp( p_demux->psz_access, "file", 4 ) )
  93     {
  94         if( !p_demux->p_private )
  95             p_demux->p_private = (void*)vlc_meta_New();
  96         TagLib::FileRef f( p_demux->psz_path );
  97         if( !f.isNull() && f.tag() && !f.tag()->isEmpty() )
  98         {
  99             TagLib::Tag *tag = f.tag();
 100             vlc_meta_t *p_meta = (vlc_meta_t *)(p_demux->p_private );
 101
 102 #define SET( foo, bar ) vlc_meta_Set##foo( p_meta, tag->bar ().toCString(true))
 103             SET( Title, title );
 104             SET( Artist, artist );
 105             SET( Album, album );
 106 //            SET( Comment, comment );
 107             SET( Genre, genre );
 108 //            SET( Year, year ); Gra, this is an int, need to convert
 109 //            SET( Tracknum , track ); Same
 110 #undef SET
 111
 112             if( TagLib::MPEG::File *p_mpeg =
 113                 dynamic_cast<TagLib::MPEG::File *>(f.file() ) )
 114             {
 115                 if( p_mpeg->ID3v2Tag() )
 116                 {
 117                     TagLib::ID3v2::Tag *tag = p_mpeg->ID3v2Tag();
 118                     TagLib::ID3v2::FrameList list = tag->frameListMap()["UFID"];
 119                     TagLib::ID3v2::UniqueFileIdentifierFrame* p_ufid;
 120                     for( TagLib::ID3v2::FrameList::Iterator iter = list.begin();
 121                             iter != list.end(); iter++ )
 122                     {
 123                         p_ufid = dynamic_cast<TagLib::ID3v2::UniqueFileIdentifierFrame*>(*iter);
 124                         const char *owner = p_ufid->owner().toCString();
 125                         if (!strcmp( owner, "http://musicbrainz.org" ))
 126                         {
 127                             /* ID3v2 UFID contains up to 64 bytes binary data
 128                              * but in our case it will be a '\0'
 129                              * terminated string */
 130                             char *psz_ufid = (char*) malloc( 64 );
 131                             int j = 0;
 132                             while( ( j < 63 ) &&
 133                                     ( j < p_ufid->identifier().size() ) )
 134                                 psz_ufid[j] = p_ufid->identifier()[j++];
 135                             psz_ufid[j] = '\0';
 136                             vlc_meta_SetTrackID( p_meta, psz_ufid );
 137                             free( psz_ufid );
 138                         }
 139                     }
 140                     /* musicbrainz artist and album id: not useful yet */
 141 #if 0
 142                     list = tag->frameListMap()["TXXX"];
 143                     TagLib::ID3v2::UserTextIdentificationFrame* p_txxx;
 144                     for( TagLib::ID3v2::FrameList::Iterator iter = list.begin();
 145                             iter != list.end(); iter++ )
 146                     {
 147                         p_txxx = dynamic_cast<TagLib::ID3v2::UserTextIdentificationFrame*>(*iter);
 148                         const char *psz_desc= p_txxx->description().toCString();
 149                         if( !strncmp( psz_desc, "MusicBrainz Artist Id", 21 ) )
 150                             vlc_meta_SetArtistID( p_meta,
 151                                     p_txxx->fieldList().toString().toCString());
 152                         if( !strncmp( psz_desc, "MusicBrainz Album Id", 20 ) )
 153                             vlc_meta_SetAlbumID( p_meta,
 154                                     p_txxx->fieldList().toString().toCString());
 155                     }
 156 #endif
 157                 }
 158             }
 159
 160             DetectImage( f, p_meta );
 161
 162             return VLC_SUCCESS;
 163         }
 164     }
 165     return VLC_EGENERIC;
 166 }
 167
 168 static int WriteMeta( vlc_object_t *p_this )
 169 {
 170     playlist_t *p_playlist = (playlist_t *)p_this;
 171     meta_export_t *p_export = (meta_export_t *)p_playlist->p_private;
 172     input_item_t *p_item = p_export->p_item;
 173
 174     TagLib::FileRef f( p_export->psz_file );
 175     if( !f.isNull() && f.tag() )
 176     {
 177         TagLib::Tag *tag = f.tag();
 178         tag->setArtist( p_item->p_meta->psz_artist );
 179         f.save();
 180         return VLC_SUCCESS;
 181     }
 182     return VLC_EGENERIC;
 183 }
 184
 185 static int DownloadArt( vlc_object_t *p_this )
 186 {
 187     /* We need to be passed the file name
 188      * Fetch the thing from the file, save it to the cache folder
 189      */
 190     return VLC_EGENERIC;
 191 }