/*

 * 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 <stddef.h>

#include <stdint.h>

#include "buffer.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)

{

    struct TestStruct {

        AVVideoEncParams   p;

        AVVideoBlockParams b;

    };

    const size_t blocks_offset = offsetof(struct TestStruct, 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;

}