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/*
* 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 "detection_bbox.h"
AVDetectionBBoxHeader *av_detection_bbox_alloc(uint32_t nb_bboxes, size_t *out_size)
{
size_t size;
struct BBoxContext {
AVDetectionBBoxHeader header;
AVDetectionBBox boxes[1];
} *ret;
const size_t bboxes_offset = offsetof(struct BBoxContext, boxes);
size = sizeof(*ret);
if (nb_bboxes - 1 > (SIZE_MAX - size) / sizeof(*ret->boxes))
return NULL;
size += sizeof(*ret->boxes) * (nb_bboxes - 1);
ret = av_mallocz(size);
if (!ret)
return NULL;
ret->header.nb_bboxes = nb_bboxes;
ret->header.bbox_size = sizeof(*ret->boxes);
ret->header.bboxes_offset = bboxes_offset;
if (out_size)
*out_size = size;
return &ret->header;
}
AVDetectionBBoxHeader *av_detection_bbox_create_side_data(AVFrame *frame, uint32_t nb_bboxes)
{
AVBufferRef *buf;
AVDetectionBBoxHeader *header;
size_t size;
header = av_detection_bbox_alloc(nb_bboxes, &size);
if (!header)
return NULL;
buf = av_buffer_create((uint8_t *)header, size, NULL, NULL, 0);
if (!buf) {
av_freep(&header);
return NULL;
}
if (!av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_DETECTION_BBOXES, buf)) {
av_buffer_unref(&buf);
return NULL;
}
return header;
}
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