1 /*
2 * RAW Chinese AVS video demuxer
3 * Copyright (c) 2009 Stefan Gehrer <stefan.gehrer@gmx.de>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
24
25 #define CAVS_SEQ_START_CODE 0x000001b0
26 #define CAVS_PIC_I_START_CODE 0x000001b3
27 #define CAVS_UNDEF_START_CODE 0x000001b4
28 #define CAVS_PIC_PB_START_CODE 0x000001b6
29 #define CAVS_VIDEO_EDIT_CODE 0x000001b7
30 #define CAVS_PROFILE_JIZHUN 0x20
31
33 {
34 uint32_t code= -1;
35 int pic=0, seq=0, slice_pos = 0;
36 int i;
37
39 code = (code<<8) + p->
buf[i];
40 if ((code & 0xffffff00) == 0x100) {
42 /* slices have to be consecutive */
43 if(code < slice_pos)
44 return 0;
45 slice_pos = code;
46 } else {
47 slice_pos = 0;
48 }
50 seq++;
51 /* check for the only currently supported profile */
53 return 0;
56 pic++;
59 return 0;
60 }
61 }
62 }
63 if(seq && seq*9<=pic*10)
65 return 0;
66 }
67