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
31
33 {
34 int unit_type_plus1 = 0;
35
37 // forbidden_zero_bit
38 if ((p[0] & 0x80) != 0) // Cannot get bitstream information. Malformed bitstream.
39 return -1;
40
41 // nal_unit_type
42 unit_type_plus1 = (p[0] >> 1) & 0x3F;
43 }
44
45 return unit_type_plus1 - 1;
46 }
47
49 {
52
53 return 0;
54 }
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 */
67 int size,
int ps_array_completeness);
68
69 #endif // AVFORMAT_EVC_H