mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-12 02:04:58 +00:00
5bb127a98f
Original thread: Date: Thu, 22 Mar 2007 20:23:08 -0400 Subject: [Ffmpeg-devel] [PATCH] Theora in MKV (GSoC '07 Qualification) Originally committed as revision 8505 to svn://svn.ffmpeg.org/ffmpeg/trunk
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/*
|
|
* Copyright (C) 2007 FFmpeg Project
|
|
*
|
|
* 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 "xiph.h"
|
|
|
|
int ff_split_xiph_headers(uint8_t *extradata, int extradata_size,
|
|
int first_header_size, uint8_t *header_start[3],
|
|
int header_len[3])
|
|
{
|
|
int i, j;
|
|
|
|
if (AV_RB16(extradata) == first_header_size) {
|
|
for (i=0; i<3; i++) {
|
|
header_len[i] = AV_RB16(extradata);
|
|
extradata += 2;
|
|
header_start[i] = extradata;
|
|
extradata += header_len[i];
|
|
}
|
|
} else if (extradata[0] == 2) {
|
|
for (i=0,j=1; i<2; i++,j++) {
|
|
header_len[i] = 0;
|
|
for (; j<extradata_size && extradata[j]==0xff; j++) {
|
|
header_len[i] += 0xff;
|
|
}
|
|
if (j >= extradata_size)
|
|
return -1;
|
|
|
|
header_len[i] += extradata[j];
|
|
}
|
|
header_len[2] = extradata_size - header_len[0] - header_len[1] - j;
|
|
extradata += j;
|
|
header_start[0] = extradata;
|
|
header_start[1] = header_start[0] + header_len[0];
|
|
header_start[2] = header_start[1] + header_len[1];
|
|
} else {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|