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/*
* Copyright (c) 2020 Vacing Fang <vacingfang@tencent.com>
*
* 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"
/*
* 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.
*/
typedef struct AVDOVIDecoderConfigurationRecord {
uint8_t dv_version_major;
uint8_t dv_version_minor;
uint8_t dv_profile;
uint8_t dv_level;
uint8_t rpu_present_flag;
uint8_t el_present_flag;
uint8_t bl_present_flag;
uint8_t dv_bl_signal_compatibility_id;
} 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.
*/
typedef struct AVDOVIRpuDataHeader {
uint8_t rpu_type;
uint16_t rpu_format;
uint8_t vdr_rpu_profile;
uint8_t vdr_rpu_level;
uint8_t chroma_resampling_explicit_filter_flag;
uint8_t coef_data_type; /* informative, lavc always converts to fixed */
uint8_t coef_log2_denom;
uint8_t vdr_rpu_normalized_idc;
uint8_t bl_video_full_range_flag;
uint8_t bl_bit_depth; /* [8, 16] */
uint8_t el_bit_depth; /* [8, 16] */
uint8_t vdr_bit_depth; /* [8, 16] */
uint8_t spatial_resampling_filter_flag;
uint8_t el_spatial_resampling_filter_flag;
uint8_t disable_residual_flag;
} AVDOVIRpuDataHeader;
enum AVDOVIMappingMethod {
AV_DOVI_MAPPING_POLYNOMIAL = 0,
AV_DOVI_MAPPING_MMR = 1,
};
/**
* 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 8
typedef struct AVDOVIReshapingCurve {
uint8_t num_pivots; /* [2, 9] */
uint16_t pivots[AV_DOVI_MAX_PIECES + 1]; /* sorted ascending */
enum AVDOVIMappingMethod mapping_idc[AV_DOVI_MAX_PIECES];
/* AV_DOVI_MAPPING_POLYNOMIAL */
uint8_t poly_order[AV_DOVI_MAX_PIECES]; /* [1, 2] */
int64_t poly_coef[AV_DOVI_MAX_PIECES][3]; /* x^0, x^1, x^2 */
/* AV_DOVI_MAPPING_MMR */
uint8_t mmr_order[AV_DOVI_MAX_PIECES]; /* [1, 3] */
int64_t mmr_constant[AV_DOVI_MAX_PIECES];
int64_t mmr_coef[AV_DOVI_MAX_PIECES][3/* order - 1 */][7];
} AVDOVIReshapingCurve;
enum AVDOVINLQMethod {
AV_DOVI_NLQ_NONE = -1,
AV_DOVI_NLQ_LINEAR_DZ = 0,
};
/**
* Coefficients of the non-linear inverse quantization. For the interpretation
* of these, see ETSI GS CCM 001.
*/
typedef struct AVDOVINLQParams {
uint16_t nlq_offset;
uint64_t vdr_in_max;
/* AV_DOVI_NLQ_LINEAR_DZ */
uint64_t linear_deadzone_slope;
uint64_t linear_deadzone_threshold;
} AVDOVINLQParams;
/**
* Dolby Vision RPU data mapping parameters.
*
* @note sizeof(AVDOVIDataMapping) is not part of the public ABI.
*/
typedef struct AVDOVIDataMapping {
uint8_t vdr_rpu_id;
uint8_t mapping_color_space;
uint8_t mapping_chroma_format_idc;
AVDOVIReshapingCurve curves[3]; /* per component */
/* Non-linear inverse quantization */
enum AVDOVINLQMethod nlq_method_idc;
uint32_t num_x_partitions;
uint32_t num_y_partitions;
AVDOVINLQParams nlq[3]; /* per component */
} AVDOVIDataMapping;
/**
* Dolby Vision RPU colorspace metadata parameters.
*
* @note sizeof(AVDOVIColorMetadata) is not part of the public ABI.
*/
typedef struct AVDOVIColorMetadata {
uint8_t dm_metadata_id;
uint8_t scene_refresh_flag;
/**
* Coefficients of the custom Dolby Vision IPT-PQ matrices. These are to be
* used instead of the matrices indicated by the frame's colorspace tags.
* The output of rgb_to_lms_matrix is to be fed into a BT.2020 LMS->RGB
* matrix based on a Hunt-Pointer-Estevez transform, but without any
* crosstalk. (See the definition of the ICtCp colorspace for more
* information.)
*/
AVRational ycc_to_rgb_matrix[9]; /* before PQ linearization */
AVRational ycc_to_rgb_offset[3]; /* input offset of neutral value */
AVRational rgb_to_lms_matrix[9]; /* after PQ linearization */
/**
* Extra signal metadata (see Dolby patents for more info).
*/
uint16_t signal_eotf;
uint16_t signal_eotf_param0;
uint16_t signal_eotf_param1;
uint32_t signal_eotf_param2;
uint8_t signal_bit_depth;
uint8_t signal_color_space;
uint8_t signal_chroma_format;
uint8_t signal_full_range_flag; /* [0, 3] */
uint16_t source_min_pq;
uint16_t source_max_pq;
uint16_t source_diagonal;
} AVDOVIColorMetadata;
/**
* 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.
*/
typedef struct AVDOVIMetadata {
/**
* Offset in bytes from the beginning of this structure at which the
* respective structs start.
*/
size_t header_offset; /* AVDOVIRpuDataHeader */
size_t mapping_offset; /* AVDOVIDataMapping */
size_t color_offset; /* AVDOVIColorMetadata */
} AVDOVIMetadata;
static av_always_inline AVDOVIRpuDataHeader *
av_dovi_get_header(const AVDOVIMetadata *data)
{
return (AVDOVIRpuDataHeader *)((uint8_t *) data + data->header_offset);
}
static av_always_inline AVDOVIDataMapping *
av_dovi_get_mapping(const AVDOVIMetadata *data)
{
return (AVDOVIDataMapping *)((uint8_t *) data + data->mapping_offset);
}
static av_always_inline AVDOVIColorMetadata *
av_dovi_get_color(const AVDOVIMetadata *data)
{
return (AVDOVIColorMetadata *)((uint8_t *) data + data->color_offset);
}
/**
* 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 */
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