modules/meta_engine/ID3Meta.h

   1 /*****************************************************************************
   2  * ID3Meta.h : ID3v2 Meta Helper
   3  *****************************************************************************
   4  * Copyright (C) 2016 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20 #ifndef ID3META_H
  21 #define ID3META_H
  22
  23 #include <vlc_meta.h>
  24 #include "ID3Text.h"
  25
  26 #define vlc_meta_extra vlc_meta_Title
  27 static struct
  28 {
  29     uint32_t i_tag;
  30     vlc_meta_type_t type;
  31     const char *psz;
  32 } const ID3_tag_to_metatype[] = {
  33     { VLC_FOURCC('T', 'A', 'L', 'B'), vlc_meta_Album,       NULL },
  34     { VLC_FOURCC('T', 'D', 'R', 'C'), vlc_meta_Date,        NULL },
  35     { VLC_FOURCC('T', 'E', 'N', 'C'), vlc_meta_extra,       "Encoder" },
  36     { VLC_FOURCC('T', 'I', 'T', '2'), vlc_meta_Title,       NULL },
  37     { VLC_FOURCC('T', 'O', 'P', 'E'), vlc_meta_extra,       "Original Artist" },
  38     { VLC_FOURCC('T', 'O', 'R', 'Y'), vlc_meta_extra,       "Original Release Year" },
  39     { VLC_FOURCC('T', 'P', 'E', '1'), vlc_meta_Artist,      NULL },
  40     { VLC_FOURCC('T', 'P', 'E', '2'), vlc_meta_AlbumArtist, NULL },
  41     { VLC_FOURCC('T', 'R', 'S', 'N'), vlc_meta_Publisher,   NULL },
  42     { VLC_FOURCC('T', 'R', 'S', 'O'), vlc_meta_extra,       "Radio Station Owner" },
  43 };
  44 #undef vlc_meta_extra
  45
  46 static bool ID3TextTagHandler( const uint8_t *p_buf, size_t i_buf,
  47                                vlc_meta_type_t type, const char *psz_extra,
  48                                vlc_meta_t *p_meta, bool *pb_updated )
  49 {
  50     if( p_meta == NULL )
  51         return false;
  52
  53     char *p_alloc;
  54     const char *psz = ID3TextConvert( p_buf, i_buf, &p_alloc );
  55     if( psz && *psz )
  56     {
  57         const char *psz_old = ( psz_extra ) ? vlc_meta_GetExtra( p_meta, psz_extra ):
  58                                               vlc_meta_Get( p_meta, type );
  59         if( !psz_old || strcmp( psz_old, psz ) )
  60         {
  61             if( pb_updated )
  62                 *pb_updated = true;
  63             if( psz_extra )
  64                 vlc_meta_AddExtra( p_meta, psz_extra, psz );
  65             else
  66                 vlc_meta_Set( p_meta, type, psz );
  67         }
  68     }
  69     free( p_alloc );
  70
  71     return (psz != NULL);
  72 }
  73
  74 static bool ID3LinkFrameTagHandler( const uint8_t *p_buf, size_t i_buf,
  75                                     vlc_meta_t *p_meta, bool *pb_updated )
  76 {
  77     if( i_buf > 13 && p_meta )
  78     {
  79         const char *psz = (const char *)&p_buf[1];
  80         size_t i_len = i_buf - 1;
  81         size_t i_desclen = strnlen(psz, i_len);
  82         if( i_desclen < i_len - 1 && i_desclen > 11 &&
  83             !strncmp( "artworkURL_", psz, 11 ) )
  84         {
  85             const char *psz_old = vlc_meta_Get( p_meta, vlc_meta_ArtworkURL );
  86             if( !psz_old || strncmp( psz_old, &psz[i_desclen], i_len - i_desclen ) )
  87             {
  88                 char *p_alloc = strndup(&psz[i_desclen + 1], i_len - i_desclen - 1);
  89                 vlc_meta_Set( p_meta, vlc_meta_ArtworkURL, p_alloc );
  90                 free( p_alloc );
  91                 *pb_updated = true;
  92             }
  93         }
  94         return true;
  95     }
  96     return false;
  97 }
  98
  99 static bool ID3HandleTag( const uint8_t *p_buf, size_t i_buf,
 100                           uint32_t i_tag,
 101                           vlc_meta_t *p_meta, bool *pb_updated )
 102 {
 103     if( i_tag == VLC_FOURCC('W', 'X', 'X', 'X') )
 104     {
 105         return ID3LinkFrameTagHandler( p_buf, i_buf, p_meta, pb_updated );
 106     }
 107     else if( i_tag == VLC_FOURCC('T', 'X', 'X', 'X') )
 108     {
 109         char *psz_key_alloc;
 110         const char *psz_key = ID3TextConvert( p_buf, i_buf, &psz_key_alloc );
 111         if( psz_key )
 112         {
 113             const size_t i_len = strlen( psz_key ) + 2;
 114             if( i_len < i_buf )
 115             {
 116                 /* Only set those which are known as non binary */
 117                 if( !strncasecmp( psz_key, "REPLAYGAIN_", 11 ) )
 118                 {
 119                     char *psz_val_alloc;
 120                     const char *psz_val = ID3TextConv( &p_buf[i_len], i_buf - i_len,
 121                                                        p_buf[0], &psz_val_alloc );
 122                     if( psz_val )
 123                     {
 124                         vlc_meta_AddExtra( p_meta, psz_key, psz_val );
 125                         free( psz_val_alloc );
 126                     }
 127                 }
 128             }
 129             free( psz_key_alloc );
 130             return (vlc_meta_GetExtraCount( p_meta ) > 0);
 131         }
 132     }
 133     else if ( ((const char *) &i_tag)[0] == 'T' )
 134     {
 135         for( size_t i=0; i<ARRAY_SIZE(ID3_tag_to_metatype); i++ )
 136         {
 137             if( ID3_tag_to_metatype[i].i_tag == i_tag )
 138                 return ID3TextTagHandler( p_buf, i_buf,
 139                                           ID3_tag_to_metatype[i].type,
 140                                           ID3_tag_to_metatype[i].psz,
 141                                           p_meta, pb_updated );
 142         }
 143     }
 144
 145     return false;
 146 }
 147
 148 #endif