CDEF

Collaboration diagram for CDEF:

Functions
void	av1_cdef_frame (YV12_BUFFER_CONFIG *frame, AV1_COMMON *const cm, MACROBLOCKD *xd, cdef_init_fb_row_t cdef_init_fb_row_fn)
	Function for applying CDEF to a frame. More...
void	av1_cdef_search (struct MultiThreadInfo *mt_info, const YV12_BUFFER_CONFIG *frame, const YV12_BUFFER_CONFIG *ref, AV1_COMMON *cm, MACROBLOCKD *xd, CDEF_PICK_METHOD pick_method, int rdmult, int skip_cdef_feature, int frames_since_key, CDEF_CONTROL cdef_control, const int is_screen_content, int non_reference_frame)
	AV1 CDEF parameter search. More...

Detailed Description

This module describes the CDEF parameter search algorithm in AV1. More details will be added.

Function Documentation

av1_cdef_frame()

void av1_cdef_frame	(	YV12_BUFFER_CONFIG *	frame,
		AV1_COMMON *const	cm,
		MACROBLOCKD *	xd,
		cdef_init_fb_row_t	cdef_init_fb_row_fn
	)

Function for applying CDEF to a frame.

This function applies CDEF to a frame.

Parameters

[in,out]	frame	Compressed frame buffer
[in,out]	cm	Pointer to top level common structure
[in]	xd	Pointer to common current coding block structure
[in]	cdef_init_fb_row_fn	Function Pointer

Returns

Nothing is returned. Instead, the filtered frame is output in frame.

av1_cdef_search()

void av1_cdef_search	(	struct MultiThreadInfo *	mt_info,
		const YV12_BUFFER_CONFIG *	frame,
		const YV12_BUFFER_CONFIG *	ref,
		AV1_COMMON *	cm,
		MACROBLOCKD *	xd,
		CDEF_PICK_METHOD	pick_method,
		int	rdmult,
		int	skip_cdef_feature,
		int	frames_since_key,
		CDEF_CONTROL	cdef_control,
		const int	is_screen_content,
		int	non_reference_frame
	)

AV1 CDEF parameter search.

Searches for optimal CDEF parameters for frame

Parameters

[in]	mt_info	Pointer to multi-threading parameters
[in]	frame	Compressed frame buffer
[in]	ref	Source frame buffer
[in,out]	cm	Pointer to top level common structure
[in]	xd	Pointer to common current coding block structure
[in]	pick_method	The method used to select params
[in]	rdmult	rd multiplier to use in making param choices
[in]	skip_cdef_feature	Speed feature to skip cdef
[in]	frames_since_key	Number of frames since key frame
[in]	cdef_control	Parameter that controls CDEF application
[in]	is_screen_content	Whether it is screen content type
[in]	non_reference_frame	Indicates if current frame is non-reference

Returns

Nothing is returned. Instead, optimal CDEF parameters are stored in the cdef_info structure of type CdefInfo inside cm:

• cdef_bits: Bits of strength parameters
• nb_cdef_strengths: Number of strength parameters
• cdef_strengths: list of nb_cdef_strengths strength parameters for the luma plane.
• uv_cdef_strengths: list of nb_cdef_strengths strength parameters for the chroma planes.
• damping_factor: CDEF damping factor.