237 lines
7.5 KiB
C
237 lines
7.5 KiB
C
/*
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* Copyright (c) 2020 Vacing Fang <vacingfang@tencent.com>
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*
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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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/**
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* @file
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* DOVI configuration
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*/
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#ifndef AVUTIL_DOVI_META_H
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#define AVUTIL_DOVI_META_H
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#include <stdint.h>
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#include <stddef.h>
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#include "rational.h"
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/*
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* DOVI configuration
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* ref: dolby-vision-bitstreams-within-the-iso-base-media-file-format-v2.1.2
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dolby-vision-bitstreams-in-mpeg-2-transport-stream-multiplex-v1.2
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* @code
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* uint8_t dv_version_major, the major version number that the stream complies with
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* uint8_t dv_version_minor, the minor version number that the stream complies with
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* uint8_t dv_profile, the Dolby Vision profile
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* uint8_t dv_level, the Dolby Vision level
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* uint8_t rpu_present_flag
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* uint8_t el_present_flag
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* uint8_t bl_present_flag
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* uint8_t dv_bl_signal_compatibility_id
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* @endcode
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*
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* @note The struct must be allocated with av_dovi_alloc() and
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* its size is not a part of the public ABI.
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*/
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typedef struct AVDOVIDecoderConfigurationRecord {
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uint8_t dv_version_major;
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uint8_t dv_version_minor;
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uint8_t dv_profile;
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uint8_t dv_level;
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uint8_t rpu_present_flag;
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uint8_t el_present_flag;
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uint8_t bl_present_flag;
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uint8_t dv_bl_signal_compatibility_id;
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} AVDOVIDecoderConfigurationRecord;
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/**
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* Allocate a AVDOVIDecoderConfigurationRecord structure and initialize its
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* fields to default values.
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*
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* @return the newly allocated struct or NULL on failure
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*/
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AVDOVIDecoderConfigurationRecord *av_dovi_alloc(size_t *size);
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/**
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* Dolby Vision RPU data header.
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*
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* @note sizeof(AVDOVIRpuDataHeader) is not part of the public ABI.
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*/
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typedef struct AVDOVIRpuDataHeader {
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uint8_t rpu_type;
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uint16_t rpu_format;
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uint8_t vdr_rpu_profile;
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uint8_t vdr_rpu_level;
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uint8_t chroma_resampling_explicit_filter_flag;
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uint8_t coef_data_type; /* informative, lavc always converts to fixed */
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uint8_t coef_log2_denom;
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uint8_t vdr_rpu_normalized_idc;
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uint8_t bl_video_full_range_flag;
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uint8_t bl_bit_depth; /* [8, 16] */
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uint8_t el_bit_depth; /* [8, 16] */
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uint8_t vdr_bit_depth; /* [8, 16] */
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uint8_t spatial_resampling_filter_flag;
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uint8_t el_spatial_resampling_filter_flag;
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uint8_t disable_residual_flag;
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} AVDOVIRpuDataHeader;
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enum AVDOVIMappingMethod {
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AV_DOVI_MAPPING_POLYNOMIAL = 0,
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AV_DOVI_MAPPING_MMR = 1,
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};
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/**
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* Coefficients of a piece-wise function. The pieces of the function span the
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* value ranges between two adjacent pivot values.
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*/
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#define AV_DOVI_MAX_PIECES 8
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typedef struct AVDOVIReshapingCurve {
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uint8_t num_pivots; /* [2, 9] */
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uint16_t pivots[AV_DOVI_MAX_PIECES + 1]; /* sorted ascending */
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enum AVDOVIMappingMethod mapping_idc[AV_DOVI_MAX_PIECES];
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/* AV_DOVI_MAPPING_POLYNOMIAL */
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uint8_t poly_order[AV_DOVI_MAX_PIECES]; /* [1, 2] */
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int64_t poly_coef[AV_DOVI_MAX_PIECES][3]; /* x^0, x^1, x^2 */
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/* AV_DOVI_MAPPING_MMR */
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uint8_t mmr_order[AV_DOVI_MAX_PIECES]; /* [1, 3] */
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int64_t mmr_constant[AV_DOVI_MAX_PIECES];
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int64_t mmr_coef[AV_DOVI_MAX_PIECES][3/* order - 1 */][7];
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} AVDOVIReshapingCurve;
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enum AVDOVINLQMethod {
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AV_DOVI_NLQ_NONE = -1,
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AV_DOVI_NLQ_LINEAR_DZ = 0,
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};
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/**
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* Coefficients of the non-linear inverse quantization. For the interpretation
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* of these, see ETSI GS CCM 001.
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*/
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typedef struct AVDOVINLQParams {
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uint16_t nlq_offset;
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uint64_t vdr_in_max;
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/* AV_DOVI_NLQ_LINEAR_DZ */
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uint64_t linear_deadzone_slope;
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uint64_t linear_deadzone_threshold;
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} AVDOVINLQParams;
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/**
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* Dolby Vision RPU data mapping parameters.
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*
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* @note sizeof(AVDOVIDataMapping) is not part of the public ABI.
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*/
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typedef struct AVDOVIDataMapping {
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uint8_t vdr_rpu_id;
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uint8_t mapping_color_space;
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uint8_t mapping_chroma_format_idc;
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AVDOVIReshapingCurve curves[3]; /* per component */
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/* Non-linear inverse quantization */
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enum AVDOVINLQMethod nlq_method_idc;
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uint32_t num_x_partitions;
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uint32_t num_y_partitions;
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AVDOVINLQParams nlq[3]; /* per component */
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} AVDOVIDataMapping;
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/**
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* Dolby Vision RPU colorspace metadata parameters.
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*
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* @note sizeof(AVDOVIColorMetadata) is not part of the public ABI.
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*/
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typedef struct AVDOVIColorMetadata {
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uint8_t dm_metadata_id;
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uint8_t scene_refresh_flag;
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/**
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* Coefficients of the custom Dolby Vision IPT-PQ matrices. These are to be
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* used instead of the matrices indicated by the frame's colorspace tags.
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* The output of rgb_to_lms_matrix is to be fed into a BT.2020 LMS->RGB
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* matrix based on a Hunt-Pointer-Estevez transform, but without any
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* crosstalk. (See the definition of the ICtCp colorspace for more
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* information.)
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*/
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AVRational ycc_to_rgb_matrix[9]; /* before PQ linearization */
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AVRational ycc_to_rgb_offset[3]; /* input offset of neutral value */
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AVRational rgb_to_lms_matrix[9]; /* after PQ linearization */
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/**
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* Extra signal metadata (see Dolby patents for more info).
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*/
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uint16_t signal_eotf;
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uint16_t signal_eotf_param0;
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uint16_t signal_eotf_param1;
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uint32_t signal_eotf_param2;
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uint8_t signal_bit_depth;
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uint8_t signal_color_space;
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uint8_t signal_chroma_format;
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uint8_t signal_full_range_flag; /* [0, 3] */
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uint16_t source_min_pq;
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uint16_t source_max_pq;
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uint16_t source_diagonal;
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} AVDOVIColorMetadata;
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/**
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* Combined struct representing a combination of header, mapping and color
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* metadata, for attaching to frames as side data.
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*
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* @note The struct must be allocated with av_dovi_metadata_alloc() and
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* its size is not a part of the public ABI.
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*/
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typedef struct AVDOVIMetadata {
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/**
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* Offset in bytes from the beginning of this structure at which the
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* respective structs start.
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*/
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size_t header_offset; /* AVDOVIRpuDataHeader */
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size_t mapping_offset; /* AVDOVIDataMapping */
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size_t color_offset; /* AVDOVIColorMetadata */
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} AVDOVIMetadata;
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static av_always_inline AVDOVIRpuDataHeader *
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av_dovi_get_header(const AVDOVIMetadata *data)
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{
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return (AVDOVIRpuDataHeader *)((uint8_t *) data + data->header_offset);
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}
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static av_always_inline AVDOVIDataMapping *
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av_dovi_get_mapping(const AVDOVIMetadata *data)
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{
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return (AVDOVIDataMapping *)((uint8_t *) data + data->mapping_offset);
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}
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static av_always_inline AVDOVIColorMetadata *
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av_dovi_get_color(const AVDOVIMetadata *data)
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{
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return (AVDOVIColorMetadata *)((uint8_t *) data + data->color_offset);
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}
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/**
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* Allocate an AVDOVIMetadata structure and initialize its
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* fields to default values.
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*
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* @param size If this parameter is non-NULL, the size in bytes of the
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* allocated struct will be written here on success
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*
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* @return the newly allocated struct or NULL on failure
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*/
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AVDOVIMetadata *av_dovi_metadata_alloc(size_t *size);
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#endif /* AVUTIL_DOVI_META_H */
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