/* * Copyright (c) 2020 Vacing Fang * * 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 #include #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 */