mirror of
https://github.com/FFmpeg/FFmpeg.git
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73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "detection_bbox.h"
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AVDetectionBBoxHeader *av_detection_bbox_alloc(uint32_t nb_bboxes, size_t *out_size)
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{
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size_t size;
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struct BBoxContext {
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AVDetectionBBoxHeader header;
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AVDetectionBBox boxes;
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};
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const size_t bboxes_offset = offsetof(struct BBoxContext, boxes);
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const size_t bbox_size = sizeof(AVDetectionBBox);
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AVDetectionBBoxHeader *header;
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size = bboxes_offset;
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if (nb_bboxes > (SIZE_MAX - size) / bbox_size)
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return NULL;
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size += bbox_size * nb_bboxes;
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header = av_mallocz(size);
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if (!header)
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return NULL;
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header->nb_bboxes = nb_bboxes;
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header->bbox_size = bbox_size;
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header->bboxes_offset = bboxes_offset;
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if (out_size)
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*out_size = size;
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return header;
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}
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AVDetectionBBoxHeader *av_detection_bbox_create_side_data(AVFrame *frame, uint32_t nb_bboxes)
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{
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AVBufferRef *buf;
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AVDetectionBBoxHeader *header;
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size_t size;
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header = av_detection_bbox_alloc(nb_bboxes, &size);
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if (!header)
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return NULL;
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buf = av_buffer_create((uint8_t *)header, size, NULL, NULL, 0);
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if (!buf) {
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av_freep(&header);
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return NULL;
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}
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if (!av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_DETECTION_BBOXES, buf)) {
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av_buffer_unref(&buf);
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return NULL;
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}
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return header;
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}
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