ac3ef4a41b
http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2009-January/059302.html Originally committed as revision 16688 to svn://svn.ffmpeg.org/ffmpeg/trunk
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
|
|
* ID3v2 header parser
|
|
* Copyright (c) 2003 Fabrice Bellard
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "id3v2.h"
|
|
|
|
int ff_id3v2_match(const uint8_t *buf)
|
|
{
|
|
return buf[0] == 'I' &&
|
|
buf[1] == 'D' &&
|
|
buf[2] == '3' &&
|
|
buf[3] != 0xff &&
|
|
buf[4] != 0xff &&
|
|
(buf[6] & 0x80) == 0 &&
|
|
(buf[7] & 0x80) == 0 &&
|
|
(buf[8] & 0x80) == 0 &&
|
|
(buf[9] & 0x80) == 0;
|
|
}
|
|
|
|
int ff_id3v2_tag_len(const uint8_t * buf)
|
|
{
|
|
int len = ((buf[6] & 0x7f) << 21) +
|
|
((buf[7] & 0x7f) << 14) +
|
|
((buf[8] & 0x7f) << 7) +
|
|
(buf[9] & 0x7f) +
|
|
ID3v2_HEADER_SIZE;
|
|
if (buf[5] & 0x10)
|
|
len += ID3v2_HEADER_SIZE;
|
|
return len;
|
|
}
|