lancir.h File Reference

Self-contained header-only "LANCIR" image resizing algorithm. More...

#include <cstring>
#include <cmath>
#include <stdint.h>

Go to the source code of this file.

Classes
class	avir::CLancIR
	LANCIR image resizer class. More...
class	avir::CLancIRParams
	LANCIR resizing parameters class. More...
class	avir::CLancIR::CResizeFilters
	Class for fractional delay filter bank storage and calculation. More...
struct	avir::CLancIR::CResizePos
	Structure defines source scanline positions and filters for each destination pixel. More...
class	avir::CLancIR::CResizeScanline
	Scanline resizing positions class. More...
class	avir::CLancIR::CResizeFilters::CSineGen
	Sine-wave signal generator class. More...

Macros
#define	LANCIR_ALIGN   4
	Address alignment (granularity) used by resizing functions, in bytes.
#define	LANCIR_LF_POST
	Scanline resize function epilogue.
#define	LANCIR_LF_PRE
	Scanline resize function prologue.
#define	LANCIR_NULLPTR
	Macro is defined, if nullptr workaround is in use, for pre-C++11 compilers. Undefined at the end of file.
#define	nullptr   NULL

Detailed Description

Self-contained header-only "LANCIR" image resizing algorithm.

Version

3.1

This is a self-contained inclusion file for the "LANCIR" image resizer, a part of the AVIR library. Features scalar, AVX, SSE2, NEON, and WASM SIMD128 optimizations as well as batched resizing technique which provides a better CPU cache performance.

AVIR Copyright (c) 2015-2025 Aleksey Vaneev

Macro Definition Documentation

LANCIR_LF_POST

#define LANCIR_LF_POST

Value:

                op += opinc; \
                rp++; \
            }

Scanline resize function epilogue.

LANCIR_LF_PRE

#define LANCIR_LF_PRE

Value:

            const CResizePos* const rpe = rp + DstLen; \
            while( rp != rpe ) \
            { \
                const float* flt = rp -> flt; \
                const float* ip; \
                if( UseSP ) \
                { \
                    ip = (const float*) ( (intptr_t) sp + rp -> spo ); \
                } \
                else \
                { \
                    ip = (const float*) rp -> spo; \
                }

Scanline resize function prologue.