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 <tstring.h>
  33 #include <id3v2tag.h>
  34 #include <mpegfile.h>
  35 #include <flacfile.h>
  36 #include <uniquefileidentifierframe.h>
  37 #if 0 //for artist and album id
  38 #include <textidentificationframe.h>
  39 #endif
  40
  41 static int  ReadMeta    ( vlc_object_t * );
  42 static int  DownloadArt ( vlc_object_t * );
  43 static int  WriteMeta   ( vlc_object_t * );
  44
  45 vlc_module_begin();
  46     set_capability( "meta reader", 1000 );
  47     set_callbacks( ReadMeta, NULL );
  48     add_submodule();
  49         set_capability( "art downloader", 50 );
  50         set_callbacks( DownloadArt, NULL );
  51     add_submodule();
  52         set_capability( "meta writer", 50 );
  53         set_callbacks( WriteMeta, NULL );
  54 vlc_module_end();
  55
  56 static bool checkID3Image( const TagLib::ID3v2::Tag *tag )
  57 {
  58     TagLib::ID3v2::FrameList l = tag->frameListMap()[ "APIC" ];
  59     return !l.isEmpty();
  60 }
  61
  62 /* Try detecting embedded art */
  63 static void DetectImage( TagLib::FileRef f, vlc_meta_t *p_meta )
  64 {
  65     if( TagLib::MPEG::File *mpeg =
  66                dynamic_cast<TagLib::MPEG::File *>(f.file() ) )
  67     {
  68         if( mpeg->ID3v2Tag() && checkID3Image( mpeg->ID3v2Tag() ) )
  69             vlc_meta_SetArtURL( p_meta, "APIC" );
  70     }
  71     else if( TagLib::FLAC::File *flac =
  72              dynamic_cast<TagLib::FLAC::File *>(f.file() ) )
  73     {
  74         if( flac->ID3v2Tag() && checkID3Image( flac->ID3v2Tag() ) )
  75             vlc_meta_SetArtURL( p_meta, "APIC" );
  76     }
  77 #if 0
  78 /* This needs special additions to taglib */
  79  * else if( TagLib::MP4::File *mp4 =
  80                dynamic_cast<TagLib::MP4::File *>( f.file() ) )
  81     {
  82         TagLib::MP4::Tag *mp4tag =
  83                 dynamic_cast<TagLib::MP4::Tag *>( mp4->tag() );
  84         if( mp4tag && mp4tag->cover().size() )
  85             vlc_meta_SetArtURL( p_meta, "MP4C" );
  86     }
  87 #endif
  88 }
  89
  90 static int ReadMeta( vlc_object_t *p_this )
  91 {
  92     demux_t *p_demux = (demux_t *)p_this;
  93
  94     if( !strncmp( p_demux->psz_access, "file", 4 ) )
  95     {
  96         if( !p_demux->p_private )
  97             p_demux->p_private = (void*)vlc_meta_New();
  98         TagLib::FileRef f( p_demux->psz_path );
  99         if( !f.isNull() && f.tag() && !f.tag()->isEmpty() )
 100         {
 101             TagLib::Tag *tag = f.tag();
 102             vlc_meta_t *p_meta = (vlc_meta_t *)(p_demux->p_private );
 103
 104 #define SET( foo, bar ) vlc_meta_Set##foo( p_meta, tag->bar ().toCString(true))
 105             SET( Title, title );
 106             SET( Artist, artist );
 107             SET( Album, album );
 108 //            SET( Comment, comment );
 109             SET( Genre, genre );
 110 //            SET( Year, year ); Gra, this is an int, need to convert
 111 //            SET( Tracknum , track ); Same
 112 #undef SET
 113
 114             if( TagLib::MPEG::File *p_mpeg =
 115                 dynamic_cast<TagLib::MPEG::File *>(f.file() ) )
 116             {
 117                 if( p_mpeg->ID3v2Tag() )
 118                 {
 119                     TagLib::ID3v2::Tag *tag = p_mpeg->ID3v2Tag();
 120                     TagLib::ID3v2::FrameList list = tag->frameListMap()["UFID"];
 121                     TagLib::ID3v2::UniqueFileIdentifierFrame* p_ufid;
 122                     for( TagLib::ID3v2::FrameList::Iterator iter = list.begin();
 123                             iter != list.end(); iter++ )
 124                     {
 125                         p_ufid = dynamic_cast<TagLib::ID3v2::UniqueFileIdentifierFrame*>(*iter);
 126                         const char *owner = p_ufid->owner().toCString();
 127                         if (!strcmp( owner, "http://musicbrainz.org" ))
 128                         {
 129                             /* ID3v2 UFID contains up to 64 bytes binary data
 130                              * but in our case it will be a '\0'
 131                              * terminated string */
 132                             char *psz_ufid = (char*) malloc( 64 );
 133                             int j = 0;
 134                             while( ( j < 63 ) &&
 135                                     ( j < p_ufid->identifier().size() ) )
 136                                 psz_ufid[j] = p_ufid->identifier()[j++];
 137                             psz_ufid[j] = '\0';
 138                             vlc_meta_SetTrackID( p_meta, psz_ufid );
 139                             free( psz_ufid );
 140                         }
 141                     }
 142                     /* musicbrainz artist and album id: not useful yet */
 143 #if 0
 144                     list = tag->frameListMap()["TXXX"];
 145                     TagLib::ID3v2::UserTextIdentificationFrame* p_txxx;
 146                     for( TagLib::ID3v2::FrameList::Iterator iter = list.begin();
 147                             iter != list.end(); iter++ )
 148                     {
 149                         p_txxx = dynamic_cast<TagLib::ID3v2::UserTextIdentificationFrame*>(*iter);
 150                         const char *psz_desc= p_txxx->description().toCString();
 151                         if( !strncmp( psz_desc, "MusicBrainz Artist Id", 21 ) )
 152                             vlc_meta_SetArtistID( p_meta,
 153                                     p_txxx->fieldList().toString().toCString());
 154                         if( !strncmp( psz_desc, "MusicBrainz Album Id", 20 ) )
 155                             vlc_meta_SetAlbumID( p_meta,
 156                                     p_txxx->fieldList().toString().toCString());
 157                     }
 158 #endif
 159                 }
 160             }
 161
 162             DetectImage( f, p_meta );
 163
 164             return VLC_SUCCESS;
 165         }
 166     }
 167     return VLC_EGENERIC;
 168 }
 169
 170 #define SET(a,b) if(b) { \
 171         TagLib::String *psz_##a = new TagLib::String( b, \
 172             TagLib::String::UTF8 ); \
 173         tag->set##a( *psz_##a ); \
 174         delete psz_##a; \
 175     }
 176
 177 static int WriteMeta( vlc_object_t *p_this )
 178 {
 179     playlist_t *p_playlist = (playlist_t *)p_this;
 180     meta_export_t *p_export = (meta_export_t *)p_playlist->p_private;
 181     input_item_t *p_item = p_export->p_item;
 182
 183     if( p_item == NULL )
 184     {
 185         msg_Err( p_this, "Can't save meta data of an empty input" );
 186         return VLC_EGENERIC;
 187     }
 188
 189     TagLib::FileRef f( p_export->psz_file );
 190     if( !f.isNull() && f.tag() )
 191     {
 192         msg_Dbg( p_this, "Updating metadata for %s", p_export->psz_file );
 193
 194         TagLib::Tag *tag = f.tag();
 195
 196         SET( Artist, p_item->p_meta->psz_artist );
 197
 198         char *psz_titlec = ( p_item->p_meta->psz_title ?
 199             p_item->p_meta->psz_title : p_item->psz_name );
 200         TagLib::String *psz_title = new TagLib::String( psz_titlec,
 201             TagLib::String::UTF8 );
 202         tag->setTitle( *psz_title );
 203         delete psz_title;
 204
 205         SET( Album, p_item->p_meta->psz_album );
 206         SET( Genre, p_item->p_meta->psz_genre );
 207
 208         if( p_item->p_meta->psz_date )
 209             tag->setYear( atoi( p_item->p_meta->psz_date ) );
 210         if( p_item->p_meta->psz_tracknum )
 211             tag->setTrack( atoi( p_item->p_meta->psz_tracknum ) );
 212
 213         f.save();
 214         return VLC_SUCCESS;
 215     }
 216     msg_Err( p_this, "File %s can't be opened for tag writing\n",
 217         p_export->psz_file );
 218     return VLC_EGENERIC;
 219 }
 220
 221 static int DownloadArt( vlc_object_t *p_this )
 222 {
 223     /* We need to be passed the file name
 224      * Fetch the thing from the file, save it to the cache folder
 225      */
 226     return VLC_EGENERIC;
 227 }