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/*********************************************************************
*
* Copyright (C) 1999, Espen Skoglund
* Department of Computer Science, University of Tromsų
*
* Filename: id3_frame_content.c
* Description: Code for handling ID3 content frames.
* Author: Espen Skoglund <espensk@stud.cs.uit.no>
* Created at: Mon Feb 8 17:13:46 1999
*
* $Id$
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
********************************************************************/
#include <stdio.h>
#include "mpg123.h"
#include "id3.h"
/*
* Function id3_get_content (frame)
*
* Expand content type string of frame and return it. Return NULL
* upon error.
*
*/
char *id3_get_content(id3_frame_t *frame)
{
char *text, *ptr;
char *buffer = frame->fr_owner->id3_buffer;
int spc = sizeof( frame->fr_owner->id3_buffer ) - 1;
/* Type check */
if ( frame->fr_desc->fd_id != ID3_TCON )
return NULL;
/* Check if frame is compressed */
if ( frame->fr_data_z && !frame->fr_data )
if ( id3_decompress_frame( frame ) == -1 )
return NULL;
text = (char *) frame->fr_data + 1;
/*
* If content is just plain text, return it.
*/
if ( text[0] != '(' )
return text;
/*
* Expand ID3v1 genre numbers.
*/
ptr = buffer;
while ( text[0] == '(' && text[1] != '(' && spc > 0 ) {
char *genre;
int num = 0;
if ( text[1] == 'R' && text[2] == 'X' ) {
text += 4;
genre = ptr != buffer ? " (Remix)" : "(Remix)";
} else if ( text[1] == 'C' && text[2] == 'R' ) {
text += 4;
genre = ptr != buffer ? " (Cover)" : "(Cover)";
} else {
/* Get ID3v1 genre number */
text++;
while ( *text != ')' ) {
num *= 10;
num += *text++ - '0';
}
text++;
/* Boundary check */
if ( num >= (int)(sizeof(mpg123_id3_genres) / sizeof(char *)) )
continue;
genre = (char *)mpg123_id3_genres[num];
if ( ptr != buffer && spc-- > 0 )
*ptr++ = '/';
}
/* Expand string into buffer */
while ( *genre != '\0' && spc > 0 ) {
*ptr++ = *genre++;
spc--;
}
}
/*
* Add plaintext refinement.
*/
if ( *text == '(' )
text++;
if ( *text != '\0' && ptr != buffer && spc-- > 0 )
*ptr++ = ' ';
while ( *text != '\0' && spc > 0 ) {
*ptr++ = *text++;
spc--;
}
*ptr = '\0';
/*
* Return the expanded content string.
*/
return buffer;
}
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