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
|
/*
* 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
*/
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include "buffer.h"
#include "common.h"
#include "frame.h"
#include "mem.h"
#include "video_enc_params.h"
AVVideoEncParams *av_video_enc_params_alloc(enum AVVideoEncParamsType type,
unsigned int nb_blocks, size_t *out_size)
{
const size_t blocks_offset = offsetof(
struct {
AVVideoEncParams p;
AVVideoBlockParams b;
}, b);
size_t size = blocks_offset;
AVVideoEncParams *par;
if (nb_blocks > (SIZE_MAX - size) / sizeof(AVVideoBlockParams))
return NULL;
size += sizeof(AVVideoBlockParams) * nb_blocks;
par = av_mallocz(size);
if (!par)
return NULL;
par->type = type;
par->nb_blocks = nb_blocks;
par->block_size = sizeof(AVVideoBlockParams);
par->blocks_offset = blocks_offset;
if (out_size)
*out_size = size;
return par;
}
AVVideoEncParams*
av_video_enc_params_create_side_data(AVFrame *frame, enum AVVideoEncParamsType type,
unsigned int nb_blocks)
{
AVBufferRef *buf;
AVVideoEncParams *par;
size_t size;
par = av_video_enc_params_alloc(type, nb_blocks, &size);
if (!par)
return NULL;
buf = av_buffer_create((uint8_t *)par, size, NULL, NULL, 0);
if (!buf) {
av_freep(&par);
return NULL;
}
if (!av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_VIDEO_ENC_PARAMS, buf)) {
av_buffer_unref(&buf);
return NULL;
}
return par;
}
|
