FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/avs2dec.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 15 25 60.0%
Functions: 1 1 100.0%
Branches: 11 46 23.9%

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1 /*
2 * AVS2 video stream probe.
3 *
4 * Copyright (C) 2018 Huiwen Ren, <hwrenx@126.com>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "avformat.h"
24 #include "rawdec.h"
25 #include "libavcodec/startcode.h"
26 #include "libavutil/intreadwrite.h"
27
28 #define AVS2_ISSQH(x) ((x) == 0xB0)
29 #define AVS2_ISEND(x) ((x) == 0xB1)
30 #define AVS2_ISPIC(x) ((x) == 0xB3 || (x) == 0xB6)
31 #define AVS2_ISUNIT(x) (AVS2_ISSQH(x) || AVS2_ISEND(x) || (x) == 0xB2 || AVS2_ISPIC(x) || (x) == 0xB5 || (x) == 0xB7)
32 #define AVS2_ISPROFILE(x) ((x) == 0x20 || (x) == 0x22 || (x) == 0x30 || (x) == 0x32)
33
34 6782 static int avs2_probe(const AVProbeData *p)
35 {
36 6782 uint32_t code = -1, hds = 0, pic = 0, seq = 0;
37 6782 uint8_t state = 0;
38 6782 const uint8_t *ptr = p->buf, *end = p->buf + p->buf_size, *sqb = 0;
39
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6782 if (AV_RB32(p->buf) != 0x1B0){
40 6735 return 0;
41 }
42
43
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47 while (ptr < end) {
44 47 ptr = avpriv_find_start_code(ptr, end, &code);
45 47 state = code & 0xFF;
46
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47 if ((code & 0xffffff00) == 0x100) {
47
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47 if (AVS2_ISUNIT(state)) {
48
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47 if (sqb && !hds) {
49 hds = ptr - sqb;
50 }
51
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47 if (AVS2_ISSQH(state)) {
52
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47 if (!AVS2_ISPROFILE(*ptr))
53 47 return 0;
54 sqb = ptr;
55 seq++;
56 } else if (AVS2_ISPIC(state)) {
57 pic++;
58 } else if (AVS2_ISEND(state)) {
59 break;
60 }
61 }
62 }
63 }
64 if (seq && hds >= 21 && pic){
65 return AVPROBE_SCORE_EXTENSION + 2; // more than cavs
66 }
67
68 return 0;
69 }
70
71 FF_DEF_RAWVIDEO_DEMUXER(avs2, "raw AVS2-P2/IEEE1857.4", avs2_probe, "avs,avs2", AV_CODEC_ID_AVS2)
72