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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* Dolby Vision RPU decoder
*
* Copyright (C) 2021 Jan Ekström
* Copyright (C) 2021 Niklas Haas
*
* 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 AVCODEC_DOVI_RPU_H
#define AVCODEC_DOVI_RPU_H
#include "libavutil/dovi_meta.h"
#include "libavutil/frame.h"
#include "avcodec.h"
#define DOVI_MAX_DM_ID 15
typedef struct DOVIContext {
void *logctx;
/**
* Enable tri-state. For encoding only. FF_DOVI_AUTOMATIC enables Dolby
* Vision only if avctx->decoded_side_data contains an AVDOVIMetadata.
*/
#define FF_DOVI_AUTOMATIC -1
int enable;
/**
* Currently active dolby vision configuration, or {0} for none.
* Set by the user when decoding. Generated by ff_dovi_configure()
* when encoding.
*
* Note: sizeof(cfg) is not part of the libavutil ABI, so users should
* never pass &cfg to any other library calls. This is included merely as
* a way to look up the values of fields known at compile time.
*/
AVDOVIDecoderConfigurationRecord cfg;
/**
* Currently active RPU data header, updates on every ff_dovi_rpu_parse()
* or ff_dovi_rpu_generate().
*/
AVDOVIRpuDataHeader header;
/**
* Currently active data mappings, or NULL. Points into memory owned by the
* corresponding rpu/vdr_ref, which becomes invalid on the next call to
* ff_dovi_rpu_parse() or ff_dovi_rpu_generate().
*/
const AVDOVIDataMapping *mapping;
const AVDOVIColorMetadata *color;
/**
* Currently active extension blocks, updates on every ff_dovi_rpu_parse()
* or ff_dovi_rpu_generate().
*/
AVDOVIDmData *ext_blocks;
int num_ext_blocks;
/**
* Private fields internal to dovi_rpu.c
*/
AVDOVIColorMetadata *dm; ///< RefStruct
AVDOVIDataMapping *vdr[DOVI_MAX_DM_ID+1]; ///< RefStruct references
uint8_t *rpu_buf; ///< temporary buffer
unsigned rpu_buf_sz;
} DOVIContext;
void ff_dovi_ctx_replace(DOVIContext *s, const DOVIContext *s0);
/**
* Completely reset a DOVIContext, preserving only logctx.
*/
void ff_dovi_ctx_unref(DOVIContext *s);
/**
* Partially reset the internal state. Resets per-frame state, but preserves
* the stream-wide configuration record.
*/
void ff_dovi_ctx_flush(DOVIContext *s);
/**
* Parse the contents of a Dovi RPU NAL and update the parsed values in the
* DOVIContext struct.
*
* Returns 0 or an error code.
*
* Note: `DOVIContext.cfg` should be initialized before calling into this
* function. If not done, the profile will be guessed according to HEVC
* semantics.
*/
int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size,
int err_recognition);
/**
* Attach the decoded AVDOVIMetadata as side data to an AVFrame.
*/
int ff_dovi_attach_side_data(DOVIContext *s, AVFrame *frame);
/**
* Configure the encoder for Dolby Vision encoding. Generates a configuration
* record in s->cfg, and attaches it to avctx->coded_side_data. Sets the correct
* profile and compatibility ID based on the tagged AVCodecContext colorspace
* metadata, and the correct level based on the resolution and tagged framerate.
*
* Returns 0 or a negative error code.
*/
int ff_dovi_configure(DOVIContext *s, AVCodecContext *avctx);
/**
* Synthesize a Dolby Vision RPU reflecting the current state. Note that this
* assumes all previous calls to `ff_dovi_rpu_generate` have been appropriately
* signalled, i.e. it will not re-send already transmitted redundant data.
*
* Mutates the internal state of DOVIContext to reflect the change.
* Returns 0 or a negative error code.
*
* This generates a fully formed RPU ready for inclusion in the bitstream,
* including the EMDF header (profile 10) or NAL encapsulation (otherwise).
*/
int ff_dovi_rpu_generate(DOVIContext *s, const AVDOVIMetadata *metadata,
uint8_t **out_rpu, int *out_size);
/***************************************************
* The following section is for internal use only. *
***************************************************/
enum {
RPU_COEFF_FIXED = 0,
RPU_COEFF_FLOAT = 1,
};
/**
* Internal helper function to guess the correct DV profile for HEVC.
*
* Returns the profile number or 0 if unknown.
*/
int ff_dovi_guess_profile_hevc(const AVDOVIRpuDataHeader *hdr);
/* Default values for AVDOVIColorMetadata */
extern const AVDOVIColorMetadata ff_dovi_color_default;
#endif /* AVCODEC_DOVI_RPU_H */
|
