FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/hevcdec.c
Date: 2025-10-10 03:51:19
Exec Total Coverage
Lines: 21 21 100.0%
Functions: 1 1 100.0%
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1 /*
2 * RAW HEVC video demuxer
3 * Copyright (c) 2013 Dirk Farin <dirk.farin@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/hevc/hevc.h"
23
24 #include "avformat.h"
25 #include "rawdec.h"
26
27 7279 static int hevc_probe(const AVProbeData *p)
28 {
29 7279 uint32_t code = -1;
30 7279 int vps = 0, sps = 0, pps = 0, irap = 0;
31 int i;
32
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298793391 for (i = 0; i < p->buf_size - 1; i++) {
34 298788737 code = (code << 8) + p->buf[i];
35
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298788737 if ((code & 0xffffff00) == 0x100) {
36 7947 uint8_t nal2 = p->buf[i + 1];
37 7947 int type = (code & 0x7E) >> 1;
38
39
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7947 if (code & 0x81) // forbidden and reserved zero bits
40 1593 return 0;
41
42
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6354 if (nal2 & 0xf8) // reserved zero
43 1032 return 0;
44
45
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5322 switch (type) {
46 231 case HEVC_NAL_VPS: vps++; break;
47 317 case HEVC_NAL_SPS: sps++; break;
48 281 case HEVC_NAL_PPS: pps++; break;
49 239 case HEVC_NAL_BLA_N_LP:
50 case HEVC_NAL_BLA_W_LP:
51 case HEVC_NAL_BLA_W_RADL:
52 case HEVC_NAL_CRA_NUT:
53 case HEVC_NAL_IDR_N_LP:
54 239 case HEVC_NAL_IDR_W_RADL: irap++; break;
55 }
56 }
57 }
58
59
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4654 if (vps && sps && pps && irap)
60 206 return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg
61 4448 return 0;
62 }
63
64 FF_DEF_RAWVIDEO_DEMUXER(hevc, "raw HEVC video", hevc_probe, "hevc,h265,265", AV_CODEC_ID_HEVC)
65