Handling ID3 tags with non-latin1 encoding

Hi,

I have a question regarding handling of ID3 tags which are
non-latin1 encoded e.g. iso-8859-5.

I think I can get ucs4 strings from libid3tag and convert them
with iconv to whatever codeset originaly was used.

How can I get information about the original codeset?

Is there another designated way to handle these cases?

My current code to get a string for an ID3 tag is (FYI: it's
VDR-MP3 player plugin):

void cScanID3::ParseStr(const struct id3_tag *tag, const char *id, char * &data)
{
  const struct id3_frame *frame=id3_tag_findframe(tag,id,0);
  if(!frame) return;

  free(data); data=0;
  const union id3_field *field=&frame->fields[1];
  if(id3_field_getnstrings(field)>0) {
    const id3_ucs4_t *ucs4=id3_field_getstrings(field,0);
    if(!ucs4) return;
    if(!strcmp(id,ID3_FRAME_GENRE)) ucs4=id3_genre_name(ucs4);

    id3_latin1_t *latin1=id3_ucs4_latin1duplicate(ucs4);
    if(!latin1) return;

    data=strdup((char *)latin1);
    free(latin1);
    }
}

Obviously the code yields bad results, if the string wasn't in
latin1 originaly.

TIA.

Regards.

-- 
Stefan Huelswitt
[email protected]  | http://www.muempf.de/