2 * RAW Chinese AVS video demuxer
3 * Copyright (c) 2009 Stefan Gehrer <stefan.gehrer@gmx.de>
5 * This file is part of FFmpeg.
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.
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.
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
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
32 static int cavsvideo_probe(AVProbeData
*p
)
35 int pic
=0, seq
=0, slice_pos
= 0;
38 for(i
=0; i
<p
->buf_size
; i
++){
39 code
= (code
<<8) + p
->buf
[i
];
40 if ((code
& 0xffffff00) == 0x100) {
41 if(code
< CAVS_SEQ_START_CODE
) {
42 /* slices have to be consecutive */
49 if (code
== CAVS_SEQ_START_CODE
) {
51 /* check for the only currently supported profile */
52 if(p
->buf
[i
+1] != CAVS_PROFILE_JIZHUN
)
54 } else if ((code
== CAVS_PIC_I_START_CODE
) ||
55 (code
== CAVS_PIC_PB_START_CODE
)) {
57 } else if ((code
== CAVS_UNDEF_START_CODE
) ||
58 (code
> CAVS_VIDEO_EDIT_CODE
)) {
63 if(seq
&& seq
*9<=pic
*10)
64 return AVPROBE_SCORE_EXTENSION
+1;
68 FF_DEF_RAWVIDEO_DEMUXER(cavsvideo
, "raw Chinese AVS (Audio Video Standard)", cavsvideo_probe
, NULL
, AV_CODEC_ID_CAVS
)