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61b27b15fc
The function now accepts an existing buffer to avoid unnecessary allocations, as well as only reporting the needed amount of bytes if you pass a NULL pointer as input for data. For this, both parameters become input and output, as well as making data optional. This is backwards compatible, and as such not breaking any existing use of the function in external code (if there's any). Signed-off-by: James Almer <jamrial@gmail.com>
377 lines
14 KiB
C
377 lines
14 KiB
C
/*
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* Copyright (c) 2018 Mohammad Izadi <moh.izadi at gmail.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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#ifndef AVUTIL_HDR_DYNAMIC_METADATA_H
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#define AVUTIL_HDR_DYNAMIC_METADATA_H
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#include "frame.h"
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#include "rational.h"
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/**
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* Option for overlapping elliptical pixel selectors in an image.
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*/
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enum AVHDRPlusOverlapProcessOption {
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AV_HDR_PLUS_OVERLAP_PROCESS_WEIGHTED_AVERAGING = 0,
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AV_HDR_PLUS_OVERLAP_PROCESS_LAYERING = 1,
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};
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/**
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* Represents the percentile at a specific percentage in
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* a distribution.
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*/
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typedef struct AVHDRPlusPercentile {
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/**
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* The percentage value corresponding to a specific percentile linearized
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* RGB value in the processing window in the scene. The value shall be in
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* the range of 0 to100, inclusive.
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*/
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uint8_t percentage;
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/**
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* The linearized maxRGB value at a specific percentile in the processing
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* window in the scene. The value shall be in the range of 0 to 1, inclusive
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* and in multiples of 0.00001.
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*/
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AVRational percentile;
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} AVHDRPlusPercentile;
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/**
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* Color transform parameters at a processing window in a dynamic metadata for
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* SMPTE 2094-40.
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*/
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typedef struct AVHDRPlusColorTransformParams {
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/**
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* The relative x coordinate of the top left pixel of the processing
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* window. The value shall be in the range of 0 and 1, inclusive and
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* in multiples of 1/(width of Picture - 1). The value 1 corresponds
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* to the absolute coordinate of width of Picture - 1. The value for
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* first processing window shall be 0.
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*/
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AVRational window_upper_left_corner_x;
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/**
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* The relative y coordinate of the top left pixel of the processing
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* window. The value shall be in the range of 0 and 1, inclusive and
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* in multiples of 1/(height of Picture - 1). The value 1 corresponds
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* to the absolute coordinate of height of Picture - 1. The value for
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* first processing window shall be 0.
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*/
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AVRational window_upper_left_corner_y;
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/**
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* The relative x coordinate of the bottom right pixel of the processing
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* window. The value shall be in the range of 0 and 1, inclusive and
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* in multiples of 1/(width of Picture - 1). The value 1 corresponds
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* to the absolute coordinate of width of Picture - 1. The value for
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* first processing window shall be 1.
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*/
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AVRational window_lower_right_corner_x;
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/**
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* The relative y coordinate of the bottom right pixel of the processing
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* window. The value shall be in the range of 0 and 1, inclusive and
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* in multiples of 1/(height of Picture - 1). The value 1 corresponds
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* to the absolute coordinate of height of Picture - 1. The value for
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* first processing window shall be 1.
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*/
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AVRational window_lower_right_corner_y;
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/**
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* The x coordinate of the center position of the concentric internal and
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* external ellipses of the elliptical pixel selector in the processing
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* window. The value shall be in the range of 0 to (width of Picture - 1),
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* inclusive and in multiples of 1 pixel.
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*/
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uint16_t center_of_ellipse_x;
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/**
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* The y coordinate of the center position of the concentric internal and
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* external ellipses of the elliptical pixel selector in the processing
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* window. The value shall be in the range of 0 to (height of Picture - 1),
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* inclusive and in multiples of 1 pixel.
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*/
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uint16_t center_of_ellipse_y;
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/**
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* The clockwise rotation angle in degree of arc with respect to the
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* positive direction of the x-axis of the concentric internal and external
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* ellipses of the elliptical pixel selector in the processing window. The
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* value shall be in the range of 0 to 180, inclusive and in multiples of 1.
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*/
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uint8_t rotation_angle;
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/**
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* The semi-major axis value of the internal ellipse of the elliptical pixel
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* selector in amount of pixels in the processing window. The value shall be
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* in the range of 1 to 65535, inclusive and in multiples of 1 pixel.
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*/
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uint16_t semimajor_axis_internal_ellipse;
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/**
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* The semi-major axis value of the external ellipse of the elliptical pixel
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* selector in amount of pixels in the processing window. The value
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* shall not be less than semimajor_axis_internal_ellipse of the current
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* processing window. The value shall be in the range of 1 to 65535,
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* inclusive and in multiples of 1 pixel.
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*/
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uint16_t semimajor_axis_external_ellipse;
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/**
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* The semi-minor axis value of the external ellipse of the elliptical pixel
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* selector in amount of pixels in the processing window. The value shall be
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* in the range of 1 to 65535, inclusive and in multiples of 1 pixel.
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*/
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uint16_t semiminor_axis_external_ellipse;
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/**
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* Overlap process option indicates one of the two methods of combining
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* rendered pixels in the processing window in an image with at least one
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* elliptical pixel selector. For overlapping elliptical pixel selectors
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* in an image, overlap_process_option shall have the same value.
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*/
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enum AVHDRPlusOverlapProcessOption overlap_process_option;
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/**
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* The maximum of the color components of linearized RGB values in the
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* processing window in the scene. The values should be in the range of 0 to
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* 1, inclusive and in multiples of 0.00001. maxscl[ 0 ], maxscl[ 1 ], and
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* maxscl[ 2 ] are corresponding to R, G, B color components respectively.
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*/
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AVRational maxscl[3];
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/**
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* The average of linearized maxRGB values in the processing window in the
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* scene. The value should be in the range of 0 to 1, inclusive and in
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* multiples of 0.00001.
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*/
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AVRational average_maxrgb;
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/**
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* The number of linearized maxRGB values at given percentiles in the
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* processing window in the scene. The maximum value shall be 15.
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*/
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uint8_t num_distribution_maxrgb_percentiles;
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/**
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* The linearized maxRGB values at given percentiles in the
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* processing window in the scene.
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*/
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AVHDRPlusPercentile distribution_maxrgb[15];
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/**
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* The fraction of selected pixels in the image that contains the brightest
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* pixel in the scene. The value shall be in the range of 0 to 1, inclusive
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* and in multiples of 0.001.
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*/
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AVRational fraction_bright_pixels;
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/**
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* This flag indicates that the metadata for the tone mapping function in
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* the processing window is present (for value of 1).
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*/
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uint8_t tone_mapping_flag;
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/**
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* The x coordinate of the separation point between the linear part and the
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* curved part of the tone mapping function. The value shall be in the range
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* of 0 to 1, excluding 0 and in multiples of 1/4095.
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*/
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AVRational knee_point_x;
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/**
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* The y coordinate of the separation point between the linear part and the
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* curved part of the tone mapping function. The value shall be in the range
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* of 0 to 1, excluding 0 and in multiples of 1/4095.
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*/
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AVRational knee_point_y;
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/**
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* The number of the intermediate anchor parameters of the tone mapping
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* function in the processing window. The maximum value shall be 15.
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*/
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uint8_t num_bezier_curve_anchors;
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/**
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* The intermediate anchor parameters of the tone mapping function in the
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* processing window in the scene. The values should be in the range of 0
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* to 1, inclusive and in multiples of 1/1023.
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*/
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AVRational bezier_curve_anchors[15];
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/**
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* This flag shall be equal to 0 in bitstreams conforming to this version of
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* this Specification. Other values are reserved for future use.
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*/
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uint8_t color_saturation_mapping_flag;
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/**
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* The color saturation gain in the processing window in the scene. The
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* value shall be in the range of 0 to 63/8, inclusive and in multiples of
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* 1/8. The default value shall be 1.
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*/
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AVRational color_saturation_weight;
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} AVHDRPlusColorTransformParams;
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/**
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* This struct represents dynamic metadata for color volume transform -
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* application 4 of SMPTE 2094-40:2016 standard.
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*
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* To be used as payload of a AVFrameSideData or AVPacketSideData with the
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* appropriate type.
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*
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* @note The struct should be allocated with
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* av_dynamic_hdr_plus_alloc() and its size is not a part of
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* the public ABI.
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*/
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typedef struct AVDynamicHDRPlus {
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/**
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* Country code by Rec. ITU-T T.35 Annex A. The value shall be 0xB5.
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*/
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uint8_t itu_t_t35_country_code;
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/**
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* Application version in the application defining document in ST-2094
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* suite. The value shall be set to 0.
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*/
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uint8_t application_version;
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/**
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* The number of processing windows. The value shall be in the range
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* of 1 to 3, inclusive.
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*/
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uint8_t num_windows;
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/**
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* The color transform parameters for every processing window.
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*/
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AVHDRPlusColorTransformParams params[3];
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/**
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* The nominal maximum display luminance of the targeted system display,
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* in units of 0.0001 candelas per square metre. The value shall be in
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* the range of 0 to 10000, inclusive.
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*/
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AVRational targeted_system_display_maximum_luminance;
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/**
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* This flag shall be equal to 0 in bit streams conforming to this version
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* of this Specification. The value 1 is reserved for future use.
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*/
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uint8_t targeted_system_display_actual_peak_luminance_flag;
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/**
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* The number of rows in the targeted system_display_actual_peak_luminance
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* array. The value shall be in the range of 2 to 25, inclusive.
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*/
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uint8_t num_rows_targeted_system_display_actual_peak_luminance;
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/**
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* The number of columns in the
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* targeted_system_display_actual_peak_luminance array. The value shall be
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* in the range of 2 to 25, inclusive.
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*/
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uint8_t num_cols_targeted_system_display_actual_peak_luminance;
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/**
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* The normalized actual peak luminance of the targeted system display. The
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* values should be in the range of 0 to 1, inclusive and in multiples of
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* 1/15.
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*/
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AVRational targeted_system_display_actual_peak_luminance[25][25];
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/**
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* This flag shall be equal to 0 in bitstreams conforming to this version of
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* this Specification. The value 1 is reserved for future use.
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*/
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uint8_t mastering_display_actual_peak_luminance_flag;
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/**
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* The number of rows in the mastering_display_actual_peak_luminance array.
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* The value shall be in the range of 2 to 25, inclusive.
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*/
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uint8_t num_rows_mastering_display_actual_peak_luminance;
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/**
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* The number of columns in the mastering_display_actual_peak_luminance
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* array. The value shall be in the range of 2 to 25, inclusive.
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*/
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uint8_t num_cols_mastering_display_actual_peak_luminance;
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/**
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* The normalized actual peak luminance of the mastering display used for
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* mastering the image essence. The values should be in the range of 0 to 1,
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* inclusive and in multiples of 1/15.
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*/
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AVRational mastering_display_actual_peak_luminance[25][25];
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} AVDynamicHDRPlus;
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/**
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* Allocate an AVDynamicHDRPlus structure and set its fields to
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* default values. The resulting struct can be freed using av_freep().
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*
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* @return An AVDynamicHDRPlus filled with default values or NULL
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* on failure.
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*/
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AVDynamicHDRPlus *av_dynamic_hdr_plus_alloc(size_t *size);
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/**
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* Allocate a complete AVDynamicHDRPlus and add it to the frame.
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* @param frame The frame which side data is added to.
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*
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* @return The AVDynamicHDRPlus structure to be filled by caller or NULL
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* on failure.
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*/
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AVDynamicHDRPlus *av_dynamic_hdr_plus_create_side_data(AVFrame *frame);
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/**
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* Parse the user data registered ITU-T T.35 to AVbuffer (AVDynamicHDRPlus).
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* The T.35 buffer must begin with the application mode, skipping the
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* country code, terminal provider codes, and application identifier.
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* @param s A pointer containing the decoded AVDynamicHDRPlus structure.
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* @param data The byte array containing the raw ITU-T T.35 data.
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* @param size Size of the data array in bytes.
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*
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* @return >= 0 on success. Otherwise, returns the appropriate AVERROR.
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*/
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int av_dynamic_hdr_plus_from_t35(AVDynamicHDRPlus *s, const uint8_t *data,
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size_t size);
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#define AV_HDR_PLUS_MAX_PAYLOAD_SIZE 907
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/**
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* Serialize dynamic HDR10+ metadata to a user data registered ITU-T T.35 buffer,
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* excluding the first 48 bytes of the header, and beginning with the application mode.
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* @param s A pointer containing the decoded AVDynamicHDRPlus structure.
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* @param data[in,out] A pointer to pointer to a byte buffer to be filled with the
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* serialized metadata.
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* If *data is NULL, a buffer be will be allocated and a pointer to
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* it stored in its place. The caller assumes ownership of the buffer.
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* May be NULL, in which case the function will only store the
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* required buffer size in *size.
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* @param size[in,out] A pointer to a size to be set to the returned buffer's size.
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* If *data is not NULL, *size must contain the size of the input
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* buffer. May be NULL only if *data is NULL.
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*
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* @return >= 0 on success. Otherwise, returns the appropriate AVERROR.
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*/
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int av_dynamic_hdr_plus_to_t35(const AVDynamicHDRPlus *s, uint8_t **data, size_t *size);
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#endif /* AVUTIL_HDR_DYNAMIC_METADATA_H */
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