FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/vvcdec.c
Date: 2025-01-20 09:27:23
Exec Total Coverage
Lines: 30 30 100.0%
Functions: 2 2 100.0%
Branches: 37 38 97.4%

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1 /*
2 * RAW H.266 / VVC video demuxer
3 * Copyright (c) 2020 Nuo Mi <nuomi2021@gmail.com>
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
22 #include "libavcodec/vvc.h"
23
24 #include "avformat.h"
25 #include "rawdec.h"
26
27 5357 static int check_temporal_id(uint8_t nuh_temporal_id_plus1, int type)
28 {
29
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5357 if (nuh_temporal_id_plus1 == 0)
30 1416 return 0;
31
32
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3941 if (nuh_temporal_id_plus1 != 1) {
33
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1699 if (type >= VVC_IDR_W_RADL && type <= VVC_RSV_IRAP_11
34
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1521 || type == VVC_DCI_NUT || type == VVC_OPI_NUT
35
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1442 || type == VVC_VPS_NUT || type == VVC_SPS_NUT
36
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1411 || type == VVC_EOS_NUT || type == VVC_EOB_NUT)
37 311 return 0;
38 }
39
40 3630 return 1;
41 }
42
43 7203 static int vvc_probe(const AVProbeData *p)
44 {
45 7203 uint32_t code = -1;
46 7203 int sps = 0, pps = 0, irap = 0;
47 int i;
48
49
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307994728 for (i = 0; i < p->buf_size - 1; i++) {
50 307990187 code = (code << 8) + p->buf[i];
51
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307990187 if ((code & 0xffffff00) == 0x100) {
52 6292 uint8_t nal2 = p->buf[i + 1];
53 6292 int type = (nal2 & 0xF8) >> 3;
54
55
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6292 if (code & 0x80) // forbidden_zero_bit
56 935 return 0;
57
58
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5357 if (!check_temporal_id(nal2 & 0x7, type))
59 1727 return 0;
60
61
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3630 switch (type) {
62 65 case VVC_SPS_NUT: sps++; break;
63 242 case VVC_PPS_NUT: pps++; break;
64 71 case VVC_IDR_N_LP:
65 case VVC_IDR_W_RADL:
66 case VVC_CRA_NUT:
67 71 case VVC_GDR_NUT: irap++; break;
68 }
69 }
70 }
71
72
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4541 if (sps && pps && irap)
73 56 return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg
74 4485 return 0;
75 }
76
77 FF_DEF_RAWVIDEO_DEMUXER(vvc, "raw H.266/VVC video", vvc_probe, "h266,266,vvc", AV_CODEC_ID_VVC)
78