/src/ffmpeg/libavformat/evc.h
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * EVC helper functions for muxers |
3 | | * Copyright (c) 2022 Dawid Kozinski <d.kozinski@samsung.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 | | #ifndef AVFORMAT_EVC_H |
23 | | #define AVFORMAT_EVC_H |
24 | | |
25 | | #include <stdint.h> |
26 | | |
27 | | #include "libavutil/intreadwrite.h" |
28 | | #include "libavutil/rational.h" |
29 | | #include "libavcodec/evc.h" |
30 | | #include "avio.h" |
31 | | |
32 | | static inline int evc_get_nalu_type(const uint8_t *p, int bits_size) |
33 | 21.4k | { |
34 | 21.4k | int unit_type_plus1 = 0; |
35 | | |
36 | 21.4k | if (bits_size >= EVC_NALU_HEADER_SIZE) { |
37 | | // forbidden_zero_bit |
38 | 20.0k | if ((p[0] & 0x80) != 0) // Cannot get bitstream information. Malformed bitstream. |
39 | 3.70k | return -1; |
40 | | |
41 | | // nal_unit_type |
42 | 16.3k | unit_type_plus1 = (p[0] >> 1) & 0x3F; |
43 | 16.3k | } |
44 | | |
45 | 17.7k | return unit_type_plus1 - 1; |
46 | 21.4k | } |
47 | | |
48 | | static inline uint32_t evc_read_nal_unit_length(const uint8_t *bits, int bits_size) |
49 | 405k | { |
50 | 405k | if (bits_size >= EVC_NALU_LENGTH_PREFIX_SIZE) |
51 | 405k | return AV_RB32(bits); |
52 | | |
53 | 0 | return 0; |
54 | 405k | } |
55 | | |
56 | | /** |
57 | | * Writes EVC sample metadata to the provided AVIOContext. |
58 | | * |
59 | | * @param pb pointer to the AVIOContext where the evc sample metadata shall be written |
60 | | * @param buf input data buffer |
61 | | * @param size size in bytes of the input data buffer |
62 | | * @param ps_array_completeness @see ISO/IEC 14496-15:2021 Coding of audio-visual objects - Part 15: section 12.3.3.3 |
63 | | * |
64 | | * @return 0 in case of success, a negative error code in case of failure |
65 | | */ |
66 | | int ff_isom_write_evcc(AVIOContext *pb, const uint8_t *data, |
67 | | int size, int ps_array_completeness); |
68 | | |
69 | | #endif // AVFORMAT_EVC_H |