1/*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#include <stddef.h>
20#include <stdint.h>
21
22#include "buffer.h"
23#include "frame.h"
24#include "mem.h"
25#include "video_enc_params.h"
26
27AVVideoEncParams *av_video_enc_params_alloc(enum AVVideoEncParamsType type,
28                                            unsigned int nb_blocks, size_t *out_size)
29{
30    const size_t blocks_offset = offsetof(
31        struct {
32            AVVideoEncParams   p;
33            AVVideoBlockParams b;
34        }, b);
35    size_t size = blocks_offset;
36    AVVideoEncParams *par;
37
38    if (nb_blocks > (SIZE_MAX - size) / sizeof(AVVideoBlockParams))
39        return NULL;
40    size += sizeof(AVVideoBlockParams) * nb_blocks;
41
42    par = av_mallocz(size);
43    if (!par)
44        return NULL;
45
46    par->type          = type;
47    par->nb_blocks     = nb_blocks;
48    par->block_size    = sizeof(AVVideoBlockParams);
49    par->blocks_offset = blocks_offset;
50
51    if (out_size)
52        *out_size = size;
53
54    return par;
55}
56
57AVVideoEncParams*
58av_video_enc_params_create_side_data(AVFrame *frame, enum AVVideoEncParamsType type,
59                                     unsigned int nb_blocks)
60{
61    AVBufferRef      *buf;
62    AVVideoEncParams *par;
63    size_t size;
64
65    par = av_video_enc_params_alloc(type, nb_blocks, &size);
66    if (!par)
67        return NULL;
68    buf = av_buffer_create((uint8_t *)par, size, NULL, NULL, 0);
69    if (!buf) {
70        av_freep(&par);
71        return NULL;
72    }
73
74    if (!av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_VIDEO_ENC_PARAMS, buf)) {
75        av_buffer_unref(&buf);
76        return NULL;
77    }
78
79    return par;
80}
81