modules/meta_engine/ID3Text.h

   1 /*****************************************************************************
   2  * ID3Text.h : ID3v2 Text 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 ID3TEXT_H
  21 #define ID3TEXT_H
  22
  23 #include <vlc_charset.h>
  24
  25 static const char * ID3TextConv( const uint8_t *p_buf, size_t i_buf,
  26                                  uint8_t i_charset, char **ppsz_allocated )
  27 {
  28     char *p_alloc = NULL;
  29     const char *psz = p_alloc;
  30     if( i_buf > 0 && i_charset < 0x04 )
  31     {
  32         switch( i_charset )
  33         {
  34             case 0x00:
  35                 psz = p_alloc = FromCharset( "ISO_8859-1", p_buf, i_buf );
  36                 break;
  37             case 0x01:
  38                 psz = p_alloc = FromCharset( "UTF-16LE", p_buf, i_buf );
  39                 break;
  40             case 0x02:
  41                 psz = p_alloc = FromCharset( "UTF-16BE", p_buf, i_buf );
  42                 break;
  43             default:
  44             case 0x03:
  45                 if( p_buf[ i_buf - 1 ] != 0x00 )
  46                 {
  47                     psz = p_alloc = (char *) malloc( i_buf + 1 );
  48                     if( p_alloc )
  49                     {
  50                         memcpy( p_alloc, p_buf, i_buf - 1 );
  51                         p_alloc[i_buf] = '\0';
  52                     }
  53                 }
  54                 else
  55                 {
  56                     psz = (const char *) p_buf;
  57                 }
  58                 break;
  59         }
  60     }
  61     *ppsz_allocated = p_alloc;
  62     return psz;
  63 }
  64
  65 static inline const char * ID3TextConvert( const uint8_t *p_buf, size_t i_buf,
  66                                            char **ppsz_allocated )
  67 {
  68     if( i_buf == 0 )
  69     {
  70         *ppsz_allocated = NULL;
  71         return NULL;
  72     }
  73     return ID3TextConv( &p_buf[1], i_buf - 1, p_buf[0], ppsz_allocated );
  74 }
  75
  76 #endif