Module filter 

Filter operations for video codec implementations.

This module provides filtering primitives used in:

• Scaling (horizontal and vertical resampling)
• Loop filtering (deblocking)
• In-loop restoration filters

All operations are designed to map efficiently to SIMD instructions.

Structs

FilterOps

Filter operations using SIMD.

LoopFilterParams

Deblocking filter strength parameters.

Constants

BILINEAR_COEFFS

Bilinear interpolation coefficients (2-tap).

SUBPEL_6TAP_COEFFS

6-tap sub-pixel interpolation coefficients.

SUBPEL_8TAP_REGULAR

8-tap high-quality interpolation coefficients (AV1 regular filter).

Functions

calculate_thresholds

Calculate loop filter thresholds from parameters.

filter_ops

Create a filter operations instance with scalar fallback.

loop_filter_4

Simple 4-tap deblocking filter.

loop_filter_8

Strong 8-tap deblocking filter.