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/*
* Copyright 2023 Elias Carotti <eliascrt at amazon dot it>
*
* 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 <string.h>
#include "avstring.h"
#include "frame.h"
#include "macros.h"
#include "mem.h"
#include "video_hint.h"
AVVideoHint *av_video_hint_alloc(size_t nb_rects,
size_t *out_size)
{
struct TestStruct {
AVVideoHint hint;
AVVideoRect rect;
};
const size_t rect_offset = offsetof(struct TestStruct, rect);
size_t size = rect_offset;
AVVideoHint *hint;
*out_size = 0;
if (nb_rects > (SIZE_MAX - size) / sizeof(AVVideoRect))
return NULL;
size += sizeof(AVVideoRect) * nb_rects;
hint = av_mallocz(size);
if (!hint)
return NULL;
hint->nb_rects = nb_rects;
hint->rect_offset = rect_offset;
hint->rect_size = sizeof(AVVideoRect);
*out_size = size;
return hint;
}
AVVideoHint *av_video_hint_create_side_data(AVFrame *frame,
size_t nb_rects)
{
AVVideoHint *hint;
AVBufferRef *buf;
size_t size = 0;
hint = av_video_hint_alloc(nb_rects, &size);
if (!hint)
return NULL;
buf = av_buffer_create((uint8_t *)hint, size, NULL, NULL, 0);
if (!buf) {
av_freep(&hint);
return NULL;
}
if (!av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_VIDEO_HINT, buf)) {
av_buffer_unref(&buf);
return NULL;
}
return hint;
}
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