AVFilmGrainH274Params Struct Reference

This structure describes how to handle film grain synthesis for codecs using the ITU-T H.274 Versatile suplemental enhancement information message. More...

#include <film_grain_params.h>

Data Fields
int	model_id
	Specifies the film grain simulation mode. More...
int	blending_mode_id
	Specifies the blending mode used to blend the simulated film grain with the decoded images. More...
int	log2_scale_factor
	Specifies a scale factor used in the film grain characterization equations. More...
int	component_model_present [3]
	Indicates if the modelling of film grain for a given component is present. More...
uint16_t	num_intensity_intervals [3]
	Specifies the number of intensity intervals for which a specific set of model values has been estimated, with a range of [1, 256]. More...
uint8_t	num_model_values [3]
	Specifies the number of model values present for each intensity interval in which the film grain has been modelled, with a range of [1, 6]. More...
uint8_t	intensity_interval_lower_bound [3][256]
	Specifies the lower ounds of each intensity interval for whichthe set of model values applies for the component. More...
uint8_t	intensity_interval_upper_bound [3][256]
	Specifies the upper bound of each intensity interval for which the set of model values applies for the component. More...
int16_t	comp_model_value [3][256][6]
	Specifies the model values for the component for each intensity interval. More...

Detailed Description

This structure describes how to handle film grain synthesis for codecs using the ITU-T H.274 Versatile suplemental enhancement information message.

Note

The struct must be allocated as part of AVFilmGrainParams using av_film_grain_params_alloc(). Its size is not a part of the public ABI.

Definition at line 132 of file film_grain_params.h.

Field Documentation

model_id

int AVFilmGrainH274Params::model_id

Specifies the film grain simulation mode.

0 = Frequency filtering, 1 = Auto-regression

Definition at line 137 of file film_grain_params.h.

Referenced by ff_h2645_sei_to_frame(), ff_h274_apply_film_grain(), and print_film_grain_params().

blending_mode_id

int AVFilmGrainH274Params::blending_mode_id

Specifies the blending mode used to blend the simulated film grain with the decoded images.

0 = Additive, 1 = Multiplicative

Definition at line 145 of file film_grain_params.h.

Referenced by ff_h2645_sei_to_frame(), and print_film_grain_params().

log2_scale_factor

int AVFilmGrainH274Params::log2_scale_factor

Specifies a scale factor used in the film grain characterization equations.

Definition at line 150 of file film_grain_params.h.

Referenced by ff_h2645_sei_to_frame(), generate(), and print_film_grain_params().

component_model_present

int AVFilmGrainH274Params::component_model_present[3]

Indicates if the modelling of film grain for a given component is present.

Definition at line 155 of file film_grain_params.h.

Referenced by ff_h2645_sei_to_frame(), ff_h274_apply_film_grain(), and print_film_grain_params().

num_intensity_intervals

uint16_t AVFilmGrainH274Params::num_intensity_intervals[3]

Specifies the number of intensity intervals for which a specific set of model values has been estimated, with a range of [1, 256].

Definition at line 161 of file film_grain_params.h.

Referenced by ff_h2645_sei_to_frame(), ff_h274_apply_film_grain(), generate(), and print_film_grain_params().

num_model_values

uint8_t AVFilmGrainH274Params::num_model_values[3]

Specifies the number of model values present for each intensity interval in which the film grain has been modelled, with a range of [1, 6].

Definition at line 167 of file film_grain_params.h.

Referenced by ff_h2645_sei_to_frame(), and print_film_grain_params().

intensity_interval_lower_bound

uint8_t AVFilmGrainH274Params::intensity_interval_lower_bound[3][256]

Specifies the lower ounds of each intensity interval for whichthe set of model values applies for the component.

Definition at line 173 of file film_grain_params.h.

Referenced by ff_h2645_sei_to_frame(), generate(), and print_film_grain_params().

intensity_interval_upper_bound

uint8_t AVFilmGrainH274Params::intensity_interval_upper_bound[3][256]

Specifies the upper bound of each intensity interval for which the set of model values applies for the component.

Definition at line 179 of file film_grain_params.h.

Referenced by ff_h2645_sei_to_frame(), and print_film_grain_params().

comp_model_value

int16_t AVFilmGrainH274Params::comp_model_value[3][256][6]

Specifies the model values for the component for each intensity interval.

• When model_id == 0, the following applies: For comp_model_value[y], the range of values is [0, 2^bit_depth_luma - 1] For comp_model_value[cb..cr], the range of values is [0, 2^bit_depth_chroma - 1]
• Otherwise, the following applies: For comp_model_value[y], the range of values is [-2^(bit_depth_luma - 1), 2^(bit_depth_luma - 1) - 1] For comp_model_value[cb..cr], the range of values is [-2^(bit_depth_chroma - 1), 2^(bit_depth_chroma - 1) - 1]

Definition at line 190 of file film_grain_params.h.

Referenced by ff_h2645_sei_to_frame(), ff_h274_apply_film_grain(), generate(), and print_film_grain_params().

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The documentation for this struct was generated from the following file:

• libavutil/film_grain_params.h