chromium/third_party/ffmpeg/libavutil/video_enc_params.h

/*
 * 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
 */

#ifndef AVUTIL_VIDEO_ENC_PARAMS_H
#define AVUTIL_VIDEO_ENC_PARAMS_H

#include <stddef.h>
#include <stdint.h>

#include "libavutil/avassert.h"
#include "libavutil/frame.h"

enum AVVideoEncParamsType { … };

/**
 * Video encoding parameters for a given frame. This struct is allocated along
 * with an optional array of per-block AVVideoBlockParams descriptors.
 * Must be allocated with av_video_enc_params_alloc().
 */
AVVideoEncParams;

/**
 * Data structure for storing block-level encoding information.
 * It is allocated as a part of AVVideoEncParams and should be retrieved with
 * av_video_enc_params_block().
 *
 * sizeof(AVVideoBlockParams) is not a part of the ABI and new fields may be
 * added to it.
 */
AVVideoBlockParams;

/**
 * Get the block at the specified {@code idx}. Must be between 0 and nb_blocks - 1.
 */
static av_always_inline AVVideoBlockParams*
av_video_enc_params_block(AVVideoEncParams *par, unsigned int idx)
{ … }

/**
 * Allocates memory for AVVideoEncParams of the given type, plus an array of
 * {@code nb_blocks} AVVideoBlockParams and initializes the variables. Can be
 * freed with a normal av_free() call.
 *
 * @param out_size if non-NULL, the size in bytes of the resulting data array is
 * written here.
 */
AVVideoEncParams *av_video_enc_params_alloc(enum AVVideoEncParamsType type,
                                            unsigned int nb_blocks, size_t *out_size);

/**
 * Allocates memory for AVEncodeInfoFrame plus an array of
 * {@code nb_blocks} AVEncodeInfoBlock in the given AVFrame {@code frame}
 * as AVFrameSideData of type AV_FRAME_DATA_VIDEO_ENC_PARAMS
 * and initializes the variables.
 */
AVVideoEncParams*
av_video_enc_params_create_side_data(AVFrame *frame, enum AVVideoEncParamsType type,
                                     unsigned int nb_blocks);

#endif /* AVUTIL_VIDEO_ENC_PARAMS_H */