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 <stdlib.h>
  24
  25 #include <vlc/vlc.h>
  26 #include <vlc_playlist.h>
  27 #include <vlc_meta.h>
  28 #include <vlc_demux.h>
  29
  30 #include <fileref.h>
  31 #include <tag.h>
  32 #include <id3v2tag.h>
  33 #include <mpegfile.h>
  34 #include <flacfile.h>
  35 #include <uniquefileidentifierframe.h>
  36 #if 0 //for artist and album id
  37 #include <textidentificationframe.h>
  38 #endif
  39
  40 static int  ReadMeta    ( vlc_object_t * );
  41 static int  DownloadArt ( vlc_object_t * );
  42 static int  WriteMeta   ( vlc_object_t * );
  43
  44 vlc_module_begin();
  45     set_capability( "meta reader", 1000 );
  46     set_callbacks( ReadMeta, NULL );
  47     add_submodule();
  48         set_capability( "art downloader", 50 );
  49         set_callbacks( DownloadArt, NULL );
  50     add_submodule();
  51         set_capability( "meta writer", 50 );
  52         set_callbacks( WriteMeta, NULL );
  53 vlc_module_end();
  54
  55 static bool checkID3Image( const TagLib::ID3v2::Tag *tag )
  56 {
  57     TagLib::ID3v2::FrameList l = tag->frameListMap()[ "APIC" ];
  58     return !l.isEmpty();
  59 }
  60
  61 /* Try detecting embedded art */
  62 static void DetectImage( TagLib::FileRef f, vlc_meta_t *p_meta )
  63 {
  64     if( TagLib::MPEG::File *mpeg =
  65                dynamic_cast<TagLib::MPEG::File *>(f.file() ) )
  66     {
  67         if( mpeg->ID3v2Tag() && checkID3Image( mpeg->ID3v2Tag() ) )
  68             vlc_meta_SetArtURL( p_meta, "APIC" );
  69     }
  70     else if( TagLib::FLAC::File *flac =
  71              dynamic_cast<TagLib::FLAC::File *>(f.file() ) )
  72     {
  73         if( flac->ID3v2Tag() && checkID3Image( flac->ID3v2Tag() ) )
  74             vlc_meta_SetArtURL( p_meta, "APIC" );
  75     }
  76 #if 0
  77 /* This needs special additions to taglib */
  78  * else if( TagLib::MP4::File *mp4 =
  79                dynamic_cast<TagLib::MP4::File *>( f.file() ) )
  80     {
  81         TagLib::MP4::Tag *mp4tag =
  82                 dynamic_cast<TagLib::MP4::Tag *>( mp4->tag() );
  83         if( mp4tag && mp4tag->cover().size() )
  84             vlc_meta_SetArtURL( p_meta, "MP4C" );
  85     }
  86 #endif
  87 }
  88
  89 static int ReadMeta( vlc_object_t *p_this )
  90 {
  91     demux_t *p_demux = (demux_t *)p_this;
  92
  93     if( !strncmp( p_demux->psz_access, "file", 4 ) )
  94     {
  95         if( !p_demux->p_private )
  96             p_demux->p_private = (void*)vlc_meta_New();
  97         TagLib::FileRef f( p_demux->psz_path );
  98         if( !f.isNull() && f.tag() && !f.tag()->isEmpty() )
  99         {
 100             TagLib::Tag *tag = f.tag();
 101             vlc_meta_t *p_meta = (vlc_meta_t *)(p_demux->p_private );
 102
 103 #define SET( foo, bar ) vlc_meta_Set##foo( p_meta, tag->bar ().toCString(true))
 104             SET( Title, title );
 105             SET( Artist, artist );
 106             SET( Album, album );
 107 //            SET( Comment, comment );
 108             SET( Genre, genre );
 109 //            SET( Year, year ); Gra, this is an int, need to convert
 110 //            SET( Tracknum , track ); Same
 111 #undef SET
 112
 113             if( TagLib::MPEG::File *p_mpeg =
 114                 dynamic_cast<TagLib::MPEG::File *>(f.file() ) )
 115             {
 116                 if( p_mpeg->ID3v2Tag() )
 117                 {
 118                     TagLib::ID3v2::Tag *tag = p_mpeg->ID3v2Tag();
 119                     TagLib::ID3v2::FrameList list = tag->frameListMap()["UFID"];
 120                     TagLib::ID3v2::UniqueFileIdentifierFrame* p_ufid;
 121                     for( TagLib::ID3v2::FrameList::Iterator iter = list.begin();
 122                             iter != list.end(); iter++ )
 123                     {
 124                         p_ufid = dynamic_cast<TagLib::ID3v2::UniqueFileIdentifierFrame*>(*iter);
 125                         const char *owner = p_ufid->owner().toCString();
 126                         if (!strcmp( owner, "http://musicbrainz.org" ))
 127                         {
 128                             /* ID3v2 UFID contains up to 64 bytes binary data
 129                              * but in our case it will be a '\0'
 130                              * terminated string */
 131                             char *psz_ufid = (char*) malloc( 64 );
 132                             int j = 0;
 133                             while( ( j < 63 ) &&
 134                                     ( j < p_ufid->identifier().size() ) )
 135                                 psz_ufid[j] = p_ufid->identifier()[j++];
 136                             psz_ufid[j] = '\0';
 137                             vlc_meta_SetTrackID( p_meta, psz_ufid );
 138                             free( psz_ufid );
 139                         }
 140                     }
 141                     /* musicbrainz artist and album id: not useful yet */
 142 #if 0
 143                     list = tag->frameListMap()["TXXX"];
 144                     TagLib::ID3v2::UserTextIdentificationFrame* p_txxx;
 145                     for( TagLib::ID3v2::FrameList::Iterator iter = list.begin();
 146                             iter != list.end(); iter++ )
 147                     {
 148                         p_txxx = dynamic_cast<TagLib::ID3v2::UserTextIdentificationFrame*>(*iter);
 149                         const char *psz_desc= p_txxx->description().toCString();
 150                         if( !strncmp( psz_desc, "MusicBrainz Artist Id", 21 ) )
 151                             vlc_meta_SetArtistID( p_meta,
 152                                     p_txxx->fieldList().toString().toCString());
 153                         if( !strncmp( psz_desc, "MusicBrainz Album Id", 20 ) )
 154                             vlc_meta_SetAlbumID( p_meta,
 155                                     p_txxx->fieldList().toString().toCString());
 156                     }
 157 #endif
 158                 }
 159             }
 160
 161             DetectImage( f, p_meta );
 162
 163             return VLC_SUCCESS;
 164         }
 165     }
 166     return VLC_EGENERIC;
 167 }
 168
 169 #define SET(a,b) if(b) tag->set##a( b );
 170
 171 static int WriteMeta( vlc_object_t *p_this )
 172 {
 173     playlist_t *p_playlist = (playlist_t *)p_this;
 174     meta_export_t *p_export = (meta_export_t *)p_playlist->p_private;
 175     input_item_t *p_item = p_export->p_item;
 176
 177     if( p_item == NULL )
 178     {
 179         msg_Err( p_this, "Can't save meta data of an empty input" );
 180         return VLC_EGENERIC;
 181     }
 182
 183     TagLib::FileRef f( p_export->psz_file );
 184     if( !f.isNull() && f.tag() )
 185     {
 186         msg_Dbg( p_this, "Updating metadata for %s", p_export->psz_file );
 187         TagLib::Tag *tag = f.tag();
 188         SET( Artist, p_item->p_meta->psz_artist );
 189         if( p_item->p_meta->psz_title )
 190             tag->setTitle( p_item->p_meta->psz_title );
 191         else
 192             tag->setTitle( p_item->psz_name );
 193         SET( Album, p_item->p_meta->psz_album );
 194         SET( Genre, p_item->p_meta->psz_genre );
 195         if( p_item->p_meta->psz_date )
 196             tag->setYear( atoi( p_item->p_meta->psz_date ) );
 197         if( p_item->p_meta->psz_tracknum )
 198             tag->setTrack( atoi( p_item->p_meta->psz_tracknum ) );
 199         f.save();
 200         return VLC_SUCCESS;
 201     }
 202     msg_Err( p_this, "File %s can't be opened for tag writing\n",
 203         p_export->psz_file );
 204     return VLC_EGENERIC;
 205 }
 206
 207 static int DownloadArt( vlc_object_t *p_this )
 208 {
 209     /* We need to be passed the file name
 210      * Fetch the thing from the file, save it to the cache folder
 211      */
 212     return VLC_EGENERIC;
 213 }