chromium/third_party/ffmpeg/libavutil/dovi_meta.h

/*
 * Copyright (c) 2020 Vacing Fang <[email protected]>
 *
 * 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
 */

/**
 * @file
 * DOVI configuration
 */


#ifndef AVUTIL_DOVI_META_H
#define AVUTIL_DOVI_META_H

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

#include "rational.h"
#include "csp.h"

/*
 * DOVI configuration
 * ref: dolby-vision-bitstreams-within-the-iso-base-media-file-format-v2.1.2
        dolby-vision-bitstreams-in-mpeg-2-transport-stream-multiplex-v1.2
 * @code
 * uint8_t  dv_version_major, the major version number that the stream complies with
 * uint8_t  dv_version_minor, the minor version number that the stream complies with
 * uint8_t  dv_profile, the Dolby Vision profile
 * uint8_t  dv_level, the Dolby Vision level
 * uint8_t  rpu_present_flag
 * uint8_t  el_present_flag
 * uint8_t  bl_present_flag
 * uint8_t  dv_bl_signal_compatibility_id
 * @endcode
 *
 * @note The struct must be allocated with av_dovi_alloc() and
 *       its size is not a part of the public ABI.
 */
AVDOVIDecoderConfigurationRecord;

/**
 * Allocate a AVDOVIDecoderConfigurationRecord structure and initialize its
 * fields to default values.
 *
 * @return the newly allocated struct or NULL on failure
 */
AVDOVIDecoderConfigurationRecord *av_dovi_alloc(size_t *size);

/**
 * Dolby Vision RPU data header.
 *
 * @note sizeof(AVDOVIRpuDataHeader) is not part of the public ABI.
 */
AVDOVIRpuDataHeader;

enum AVDOVIMappingMethod { … };

/**
 * Coefficients of a piece-wise function. The pieces of the function span the
 * value ranges between two adjacent pivot values.
 */
#define AV_DOVI_MAX_PIECES …
AVDOVIReshapingCurve;

enum AVDOVINLQMethod { … };

/**
 * Coefficients of the non-linear inverse quantization. For the interpretation
 * of these, see ETSI GS CCM 001.
 */
AVDOVINLQParams;

/**
 * Dolby Vision RPU data mapping parameters.
 *
 * @note sizeof(AVDOVIDataMapping) is not part of the public ABI.
 */
AVDOVIDataMapping;

/**
 * Dolby Vision RPU colorspace metadata parameters.
 *
 * @note sizeof(AVDOVIColorMetadata) is not part of the public ABI.
 */
AVDOVIColorMetadata;

AVDOVIDmLevel1;

AVDOVIDmLevel2;

AVDOVIDmLevel3;

AVDOVIDmLevel4;

AVDOVIDmLevel5;

AVDOVIDmLevel6;

AVDOVIDmLevel8;

AVDOVIDmLevel9;

AVDOVIDmLevel10;

AVDOVIDmLevel11;

AVDOVIDmLevel254;

AVDOVIDmLevel255;

/**
 * Dolby Vision metadata extension block.
 *
 * @note sizeof(AVDOVIDmData) is not part of the public API.
 */
AVDOVIDmData;

/**
 * Combined struct representing a combination of header, mapping and color
 * metadata, for attaching to frames as side data.
 *
 * @note The struct must be allocated with av_dovi_metadata_alloc() and
 *       its size is not a part of the public ABI.
 */

AVDOVIMetadata;

static av_always_inline AVDOVIRpuDataHeader *
av_dovi_get_header(const AVDOVIMetadata *data)
{ … }

static av_always_inline AVDOVIDataMapping *
av_dovi_get_mapping(const AVDOVIMetadata *data)
{ … }

static av_always_inline AVDOVIColorMetadata *
av_dovi_get_color(const AVDOVIMetadata *data)
{ … }

static av_always_inline AVDOVIDmData *
av_dovi_get_ext(const AVDOVIMetadata *data, int index)
{ … }

/**
 * Find an extension block with a given level, or NULL. In the case of
 * multiple extension blocks, only the first is returned.
 */
AVDOVIDmData *av_dovi_find_level(const AVDOVIMetadata *data, uint8_t level);

/**
 * Allocate an AVDOVIMetadata structure and initialize its
 * fields to default values.
 *
 * @param size If this parameter is non-NULL, the size in bytes of the
 *             allocated struct will be written here on success
 *
 * @return the newly allocated struct or NULL on failure
 */
AVDOVIMetadata *av_dovi_metadata_alloc(size_t *size);

#endif /* AVUTIL_DOVI_META_H */