#include <filters.h>

Data Fields
SwsScaler	scaler
	The filter kernel and parameters to use. More...

double	scaler_params [SWS_NUM_SCALER_PARAMS]

int	src_size
	The relative sizes of the input and output images. More...

int	dst_size

double	virtual_size
	The virtual output size. More...

double	offset
	The sample offset, in units of input pixels. More...

Detailed Description

Definition at line 45 of file filters.h.

Field Documentation

◆ scaler

SwsScaler SwsFilterParams::scaler

The filter kernel and parameters to use.

Definition at line 49 of file filters.h.

Referenced by check_filter(), and ff_sws_filter_generate().

◆ scaler_params

double SwsFilterParams::scaler_params[SWS_NUM_SCALER_PARAMS]

Definition at line 50 of file filters.h.

Referenced by check_filter(), and ff_sws_filter_generate().

◆ src_size

int SwsFilterParams::src_size

The relative sizes of the input and output images.

Used to determine the number of rows in the output, as well as the fractional offsets of the samples in each row.

Definition at line 57 of file filters.h.

Referenced by check_filter(), and ff_sws_filter_generate().

◆ dst_size

int SwsFilterParams::dst_size

Definition at line 58 of file filters.h.

Referenced by check_filter(), and ff_sws_filter_generate().

◆ virtual_size

double SwsFilterParams::virtual_size

The virtual output size.

If zero, this is assumed to be the same as dst_size. Matters for e.g. chroma subsampling, where the the luma plane may be smaller than the dst_size. For example, a 99x99 input image has a chroma size of 50x50, which would be 100x100 after chroma upscaling; but is sampled only at 99x99 resolution. In this instance, dst_size is 99x99 and virtual_size is 100x100.

The upscaling offset from this shift is implicit and does not need to be accounted for in offset. In other words, offset is taken relative to the virtual size, not the sampled size.

Definition at line 72 of file filters.h.

Referenced by ff_sws_filter_generate().