src/playlist/art.c

   1 /*****************************************************************************
   2  * art.c : Art metadata handling
   3  *****************************************************************************
   4  * Copyright (C) 1998-2008 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea@videolan.org>
   8  *          Clément Stenac <zorglub@videolan.org
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <assert.h>
  30 #include <vlc_common.h>
  31 #include <vlc_playlist.h>
  32 #include <vlc_charset.h>
  33 #include <vlc_strings.h>
  34 #include <vlc_stream.h>
  35 #include <vlc_url.h>
  36
  37 #include <limits.h>                                             /* PATH_MAX */
  38
  39 #ifdef HAVE_SYS_STAT_H
  40 #   include <sys/stat.h>
  41 #endif
  42
  43 #include "../libvlc.h"
  44 #include "playlist_internal.h"
  45
  46 static void ArtCacheCreateDir( const char *psz_dir )
  47 {
  48     char newdir[strlen( psz_dir ) + 1];
  49     strcpy( newdir, psz_dir );
  50     char * psz_newdir = newdir;
  51     char * psz = psz_newdir;
  52
  53     while( *psz )
  54     {
  55         while( *psz && *psz != DIR_SEP_CHAR) psz++;
  56         if( !*psz ) break;
  57         *psz = 0;
  58         if( !EMPTY_STR( psz_newdir ) )
  59             utf8_mkdir( psz_newdir, 0700 );
  60         *psz = DIR_SEP_CHAR;
  61         psz++;
  62     }
  63     utf8_mkdir( psz_dir, 0700 );
  64 }
  65
  66 static char* ArtCacheGetDirPath( const char *psz_title, const char *psz_artist,
  67                                  const char *psz_album )
  68 {
  69     char *psz_dir;
  70     char *psz_cachedir = config_GetUserDir(VLC_CACHE_DIR);
  71
  72     if( !EMPTY_STR(psz_artist) && !EMPTY_STR(psz_album) )
  73     {
  74         char *psz_album_sanitized = filename_sanitize( psz_album );
  75         char *psz_artist_sanitized = filename_sanitize( psz_artist );
  76         if( asprintf( &psz_dir, "%s" DIR_SEP "art" DIR_SEP "artistalbum"
  77                       DIR_SEP "%s" DIR_SEP "%s", psz_cachedir,
  78                       psz_artist_sanitized, psz_album_sanitized ) == -1 )
  79             psz_dir = NULL;
  80         free( psz_album_sanitized );
  81         free( psz_artist_sanitized );
  82     }
  83     else
  84     {
  85         char * psz_title_sanitized = filename_sanitize( psz_title );
  86         if( asprintf( &psz_dir, "%s" DIR_SEP "art" DIR_SEP "title" DIR_SEP
  87                       "%s", psz_cachedir, psz_title_sanitized ) == -1 )
  88             psz_dir = NULL;
  89         free( psz_title_sanitized );
  90     }
  91     free( psz_cachedir );
  92     return psz_dir;
  93 }
  94
  95 static char *ArtCachePath( input_item_t *p_item )
  96 {
  97     char* psz_path = NULL;
  98     const char *psz_artist;
  99     const char *psz_album;
 100     const char *psz_title;
 101
 102     vlc_mutex_lock( &p_item->lock );
 103
 104     if( !p_item->p_meta )
 105         p_item->p_meta = vlc_meta_New();
 106     if( !p_item->p_meta )
 107         goto end;
 108
 109     psz_artist = vlc_meta_Get( p_item->p_meta, vlc_meta_Artist );
 110     psz_album = vlc_meta_Get( p_item->p_meta, vlc_meta_Album );
 111     psz_title = vlc_meta_Get( p_item->p_meta, vlc_meta_Title );
 112
 113     if( !psz_title )
 114         psz_title = p_item->psz_name;
 115
 116     if( (!psz_artist || !psz_album ) && !psz_title )
 117         goto end;
 118
 119     psz_path = ArtCacheGetDirPath( psz_title, psz_artist, psz_album );
 120
 121 end:
 122     vlc_mutex_unlock( &p_item->lock );
 123     return psz_path;
 124 }
 125
 126 static char *ArtCacheName( input_item_t *p_item, const char *psz_type )
 127 {
 128     char *psz_path = ArtCachePath( p_item );
 129     if( !psz_path )
 130         return NULL;
 131
 132     ArtCacheCreateDir( psz_path );
 133
 134     char *psz_ext = filename_sanitize( psz_type ? psz_type : "" );
 135     char *psz_filename;
 136     if( asprintf( &psz_filename, "%s" DIR_SEP "art%s", psz_path, psz_ext ) < 0 )
 137         psz_filename = NULL;
 138
 139     free( psz_ext );
 140     free( psz_path );
 141
 142     return psz_filename;
 143 }
 144
 145 /* */
 146 int playlist_FindArtInCache( input_item_t *p_item )
 147 {
 148     char *psz_path = ArtCachePath( p_item );
 149
 150     if( !psz_path )
 151         return VLC_EGENERIC;
 152
 153     /* Check if file exists */
 154     DIR *p_dir = utf8_opendir( psz_path );
 155     if( !p_dir )
 156     {
 157         free( psz_path );
 158         return VLC_EGENERIC;
 159     }
 160
 161     bool b_found = false;
 162     char *psz_filename;
 163     while( !b_found && (psz_filename = utf8_readdir( p_dir )) )
 164     {
 165         if( !strncmp( psz_filename, "art", 3 ) )
 166         {
 167             char *psz_file;
 168             if( asprintf( &psz_file, "%s" DIR_SEP "%s",
 169                           psz_path, psz_filename ) != -1 )
 170             {
 171                 char *psz_uri = make_URI( psz_file );
 172                 if( psz_uri )
 173                 {
 174                     input_item_SetArtURL( p_item, psz_uri );
 175                     free( psz_uri );
 176                 }
 177                 free( psz_file );
 178             }
 179
 180             b_found = true;
 181         }
 182         free( psz_filename );
 183     }
 184
 185     /* */
 186     closedir( p_dir );
 187     free( psz_path );
 188     return b_found ? VLC_SUCCESS : VLC_EGENERIC;
 189 }
 190
 191
 192 /* */
 193 int playlist_SaveArt( playlist_t *p_playlist, input_item_t *p_item,
 194                       const uint8_t *p_buffer, int i_buffer, const char *psz_type )
 195 {
 196     char *psz_filename = ArtCacheName( p_item, psz_type );
 197
 198     if( !psz_filename )
 199         return VLC_EGENERIC;
 200
 201     char *psz_uri = make_URI( psz_filename );
 202     if( !psz_uri )
 203     {
 204         free( psz_filename );
 205         return VLC_EGENERIC;
 206     }
 207
 208     /* Check if we already dumped it */
 209     struct stat s;
 210     if( !utf8_stat( psz_filename, &s ) )
 211     {
 212         input_item_SetArtURL( p_item, psz_uri );
 213         free( psz_filename );
 214         free( psz_uri );
 215         return VLC_SUCCESS;
 216     }
 217
 218     /* Dump it otherwise */
 219     FILE *f = utf8_fopen( psz_filename, "wb" );
 220     if( f )
 221     {
 222         if( fwrite( p_buffer, i_buffer, 1, f ) != 1 )
 223         {
 224             msg_Err( p_playlist, "%s: %m", psz_filename );
 225         }
 226         else
 227         {
 228             msg_Dbg( p_playlist, "album art saved to %s", psz_filename );
 229             input_item_SetArtURL( p_item, psz_uri );
 230         }
 231         fclose( f );
 232     }
 233     free( psz_filename );
 234     free( psz_uri );
 235     return VLC_SUCCESS;
 236 }
 237