2 * Copyright (C) 2007 FFmpeg Project
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 int ff_split_xiph_headers(uint8_t *extradata, int extradata_size,
24 int first_header_size, uint8_t *header_start[3],
29 if (AV_RB16(extradata) == first_header_size) {
31 header_len[i] = AV_RB16(extradata);
33 header_start[i] = extradata;
34 extradata += header_len[i];
36 } else if (extradata[0] == 2) {
37 for (i=0,j=1; i<2; i++,j++) {
39 for (; j<extradata_size && extradata[j]==0xff; j++) {
40 header_len[i] += 0xff;
42 if (j >= extradata_size)
45 header_len[i] += extradata[j];
47 header_len[2] = extradata_size - header_len[0] - header_len[1] - j;
49 header_start[0] = extradata;
50 header_start[1] = header_start[0] + header_len[0];
51 header_start[2] = header_start[1] + header_len[1];