1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/*
* AV1 helper functions for muxers
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_AV1_H
#define AVFORMAT_AV1_H
#include <stdint.h>
#include "avio.h"
typedef struct AV1SequenceParameters {
uint8_t seq_profile;
uint8_t seq_level_idx_0;
uint8_t seq_tier_0;
uint8_t high_bitdepth;
uint8_t twelve_bit;
uint8_t monochrome;
uint8_t chroma_subsampling_x;
uint8_t chroma_subsampling_y;
uint8_t chroma_sample_position;
uint8_t color_description_present_flag;
uint8_t color_primaries;
uint8_t transfer_characteristics;
uint8_t matrix_coefficients;
uint8_t color_range;
} AV1SequenceParameters;
/**
* Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and write
* the resulting bitstream to the provided AVIOContext.
*
* @param pb pointer to the AVIOContext where the filtered bitstream shall be
* written
* @param buf input data buffer
* @param size size of the input data buffer
*
* @return the amount of bytes written in case of success, a negative AVERROR
* code in case of failure
*/
int ff_av1_filter_obus(AVIOContext *pb, const uint8_t *buf, int size);
/**
* Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and write
* the resulting bitstream to a newly allocated data buffer.
*
* @param pb pointer to the AVIOContext where the filtered bitstream shall be
* written
* @param buf input data buffer
* @param out pointer to pointer that will hold the allocated data buffer
* @param size size of the input data buffer. The size of the resulting output
data buffer will be written here
*
* @return the amount of bytes written in case of success, a negative AVERROR
* code in case of failure. On failure, out and size are unchanged
*/
int ff_av1_filter_obus_buf(const uint8_t *buf, uint8_t **out, int *size);
/**
* Parses a Sequence Header from the the provided buffer.
*
* @param seq pointer to the AV1SequenceParameters where the parsed values will
* be written
* @param buf input data buffer
* @param size size in bytes of the input data buffer
*
* @return >= 0 in case of success, a negative AVERROR code in case of failure
*/
int ff_av1_parse_seq_header(AV1SequenceParameters *seq, const uint8_t *buf, int size);
/**
* Writes AV1 extradata (Sequence Header and Metadata OBUs) to the provided
* AVIOContext.
*
* @param pb pointer to the AVIOContext where the av1C box shall be written
* @param buf input data buffer
* @param size size in bytes of the input data buffer
*
* @return >= 0 in case of success, a negative AVERROR code in case of failure
*/
int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size);
#endif /* AVFORMAT_AV1_H */
|
