#include "config.h"
#include <inttypes.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/avutil.h"
#include "libavutil/bswap.h"
#include "libavutil/cpu.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/libm.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/aarch64/cpu.h"
#include "libavutil/ppc/cpu.h"
#include "libavutil/x86/asm.h"
#include "libavutil/x86/cpu.h"
#include "rgb2rgb.h"
#include "swscale.h"
#include "swscale_internal.h"

Data Structures
struct	FormatEntry

struct	ScaleAlgorithm

Macros
#define	_DEFAULT_SOURCE

#define	_SVID_SOURCE

#define	_DARWIN_C_SOURCE

#define	attribute_deprecated

#define	LICENSE_PREFIX "libswscale license: "

#define	USE_MMAP 0

Functions
static void	handle_formats (SwsContext *c)

unsigned	swscale_version (void)

const char *	swscale_configuration (void)
	Return the libswscale build-time configuration. More...

const char *	swscale_license (void)
	Return the libswscale license. More...

int	sws_isSupportedInput (enum AVPixelFormat pix_fmt)
	Return a positive value if pix_fmt is a supported input format, 0 otherwise. More...

int	sws_isSupportedOutput (enum AVPixelFormat pix_fmt)
	Return a positive value if pix_fmt is a supported output format, 0 otherwise. More...

int	sws_isSupportedEndiannessConversion (enum AVPixelFormat pix_fmt)

static double	getSplineCoeff (double a, double b, double c, double d, double dist)

static av_cold int	get_local_pos (SwsContext *s, int chr_subsample, int pos, int dir)

static av_cold int	initFilter (int16_t outFilter, int32_t filterPos, int outFilterSize, int xInc, int srcW, int dstW, int filterAlign, int one, int flags, int cpu_flags, SwsVector srcFilter, SwsVector *dstFilter, double param[2], int srcPos, int dstPos)

static void	fill_rgb2yuv_table (SwsContext *c, const int table[4], int dstRange)

static void	fill_xyztables (struct SwsContext *c)

int	sws_setColorspaceDetails (struct SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)

int	sws_getColorspaceDetails (struct SwsContext c, int inv_table, int srcRange, int *table, int dstRange, int brightness, int contrast, int *saturation)

static int	handle_jpeg (enum AVPixelFormat *format)

static int	handle_0alpha (enum AVPixelFormat *format)

static int	handle_xyz (enum AVPixelFormat *format)

SwsContext *	sws_alloc_context (void)
	Allocate an empty SwsContext. More...

static uint16_t *	alloc_gamma_tbl (double e)

static enum AVPixelFormat	alphaless_fmt (enum AVPixelFormat fmt)

av_cold int	sws_init_context (SwsContext c, SwsFilter srcFilter, SwsFilter *dstFilter)
	Initialize the swscaler context sws_context. More...

SwsContext *	sws_alloc_set_opts (int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, const double *param)
	Allocate and return an SwsContext. More...

SwsContext *	sws_getContext (int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter srcFilter, SwsFilter dstFilter, const double *param)
	Allocate and return an SwsContext. More...

static int	isnan_vec (SwsVector *a)

static void	makenan_vec (SwsVector *a)

SwsFilter *	sws_getDefaultFilter (float lumaGBlur, float chromaGBlur, float lumaSharpen, float chromaSharpen, float chromaHShift, float chromaVShift, int verbose)

SwsVector *	sws_allocVec (int length)
	Allocate and return an uninitialized vector with length coefficients. More...

SwsVector *	sws_getGaussianVec (double variance, double quality)
	Return a normalized Gaussian curve used to filter stuff quality = 3 is high quality, lower is lower quality. More...

SwsVector *	sws_getConstVec (double c, int length)
	Allocate and return a vector with length coefficients, all with the same value c. More...

SwsVector *	sws_getIdentityVec (void)
	Allocate and return a vector with just one coefficient, with value 1.0. More...

static double	sws_dcVec (SwsVector *a)

void	sws_scaleVec (SwsVector *a, double scalar)
	Scale all the coefficients of a by the scalar value. More...

void	sws_normalizeVec (SwsVector *a, double height)
	Scale all the coefficients of a so that their sum equals height. More...

static SwsVector *	sws_getConvVec (SwsVector a, SwsVector b)

static SwsVector *	sws_sumVec (SwsVector a, SwsVector b)

static SwsVector *	sws_diffVec (SwsVector a, SwsVector b)

static SwsVector *	sws_getShiftedVec (SwsVector *a, int shift)

void	sws_shiftVec (SwsVector *a, int shift)

void	sws_addVec (SwsVector a, SwsVector b)

void	sws_subVec (SwsVector a, SwsVector b)

void	sws_convVec (SwsVector a, SwsVector b)

SwsVector *	sws_cloneVec (SwsVector *a)

void	sws_printVec2 (SwsVector a, AVClass log_ctx, int log_level)
	Print with av_log() a textual representation of the vector a if log_level <= av_log_level. More...

void	sws_freeVec (SwsVector *a)

void	sws_freeFilter (SwsFilter *filter)

void	sws_freeContext (SwsContext *c)
	Free the swscaler context swsContext. More...

struct SwsContext *	sws_getCachedContext (struct SwsContext context, int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter srcFilter, SwsFilter dstFilter, const double param)
	Check if context can be reused, otherwise reallocate a new one. More...

Variables
static const FormatEntry	format_entries [AV_PIX_FMT_NB]

static const ScaleAlgorithm	scale_algorithms []

Macro Definition Documentation

◆ _DEFAULT_SOURCE

#define _DEFAULT_SOURCE

Definition at line 23 of file utils.c.

◆ _SVID_SOURCE

#define _SVID_SOURCE

Definition at line 24 of file utils.c.

◆ _DARWIN_C_SOURCE

#define _DARWIN_C_SOURCE

Definition at line 25 of file utils.c.

◆ attribute_deprecated

#define attribute_deprecated

Definition at line 60 of file utils.c.

◆ LICENSE_PREFIX

#define LICENSE_PREFIX "libswscale license: "

◆ USE_MMAP

#define USE_MMAP 0

Function Documentation

◆ handle_formats()

static void handle_formats ( SwsContext * c )

static

Definition at line 1069 of file utils.c.

Referenced by sws_init_context(), and sws_setColorspaceDetails().

◆ getSplineCoeff()

static double getSplineCoeff	(	double	a,
		double	b,
		double	c,
		double	d,
		double	dist
	)

static

Definition at line 289 of file utils.c.

Referenced by initFilter().

◆ get_local_pos()

static av_cold int get_local_pos	(	SwsContext *	s,
		int	chr_subsample,
		int	pos,
		int	dir
	)

static

Definition at line 302 of file utils.c.

Referenced by sws_init_context().

◆ initFilter()

static av_cold int initFilter	(	int16_t **	outFilter,
		int32_t **	filterPos,
		int *	outFilterSize,
		int	xInc,
		int	srcW,
		int	dstW,
		int	filterAlign,
		int	one,
		int	flags,
		int	cpu_flags,
		SwsVector *	srcFilter,
		SwsVector *	dstFilter,
		double	param[2],
		int	srcPos,
		int	dstPos
	)

static

Definition at line 331 of file utils.c.

Referenced by sws_init_context().

◆ fill_rgb2yuv_table()

static void fill_rgb2yuv_table	(	SwsContext *	c,
		const int	table[4],
		int	dstRange
	)

static

dstRange &&

Definition at line 728 of file utils.c.

Referenced by sws_setColorspaceDetails().

◆ fill_xyztables()

static void fill_xyztables ( struct SwsContext * c )

static

Definition at line 822 of file utils.c.

Referenced by handle_formats().

◆ handle_jpeg()

static int handle_jpeg ( enum AVPixelFormat * format )

static

Definition at line 1011 of file utils.c.

Referenced by sws_init_context().

◆ handle_0alpha()

static int handle_0alpha ( enum AVPixelFormat * format )

static

Definition at line 1049 of file utils.c.

Referenced by handle_formats().

◆ handle_xyz()

static int handle_xyz ( enum AVPixelFormat * format )

static

Definition at line 1060 of file utils.c.

Referenced by handle_formats().

◆ alloc_gamma_tbl()

static uint16_t* alloc_gamma_tbl ( double e )

static

Definition at line 1093 of file utils.c.

Referenced by sws_init_context().

◆ alphaless_fmt()

static enum AVPixelFormat alphaless_fmt ( enum AVPixelFormat fmt )

static

Definition at line 1107 of file utils.c.

Referenced by sws_init_context().

◆ sws_alloc_set_opts()

SwsContext* sws_alloc_set_opts	(	int	srcW,
		int	srcH,
		enum AVPixelFormat	srcFormat,
		int	dstW,
		int	dstH,
		enum AVPixelFormat	dstFormat,
		int	flags,
		const double *	param
	)

Allocate and return an SwsContext.

This is like sws_getContext() but does not perform the init step, allowing the user to set additional AVOptions.

See also: sws_getContext()

Definition at line 1866 of file utils.c.

Referenced by sws_getContext(), sws_init_context(), and sws_setColorspaceDetails().

◆ isnan_vec()

static int isnan_vec ( SwsVector * a )

static

Definition at line 1912 of file utils.c.

Referenced by sws_getDefaultFilter().

◆ makenan_vec()

static void makenan_vec ( SwsVector * a )

static

Definition at line 1921 of file utils.c.

Referenced by sws_addVec(), sws_convVec(), sws_shiftVec(), and sws_subVec().

◆ sws_dcVec()

static double sws_dcVec ( SwsVector * a )

static

Definition at line 2087 of file utils.c.

Referenced by sws_normalizeVec().

◆ sws_getConvVec()

static SwsVector* sws_getConvVec	(	SwsVector *	a,
		SwsVector *	b
	)

static

Definition at line 2112 of file utils.c.

Referenced by sws_convVec().

◆ sws_sumVec()

static SwsVector* sws_sumVec	(	SwsVector *	a,
		SwsVector *	b
	)

static

Definition at line 2131 of file utils.c.

Referenced by sws_addVec().

◆ sws_diffVec()

static SwsVector* sws_diffVec	(	SwsVector *	a,
		SwsVector *	b
	)

static

Definition at line 2149 of file utils.c.

Referenced by sws_subVec().

◆ sws_getShiftedVec()

static SwsVector* sws_getShiftedVec	(	SwsVector *	a,
		int	shift
	)

static

Definition at line 2168 of file utils.c.

Referenced by sws_shiftVec().

Variable Documentation

◆ format_entries

const FormatEntry format_entries[AV_PIX_FMT_NB]

static

Definition at line 98 of file utils.c.

Referenced by sws_isSupportedEndiannessConversion(), sws_isSupportedInput(), and sws_isSupportedOutput().

◆ scale_algorithms

const ScaleAlgorithm scale_algorithms[]

static

Initial value:

= {
    { SWS_AREA,          "area averaging",                  1  },
    { SWS_BICUBIC,       "bicubic",                         4 },
    { SWS_BICUBLIN,      "luma bicubic / chroma bilinear", -1 },
    { SWS_BILINEAR,      "bilinear",                        2 },
    { SWS_FAST_BILINEAR, "fast bilinear",                  -1 },
    { SWS_GAUSS,         "Gaussian",                        8  },
    { SWS_LANCZOS,       "Lanczos",                        -1  },
    { SWS_POINT,         "nearest neighbor / point",       -1 },
    { SWS_SINC,          "sinc",                           20  },
    { SWS_SPLINE,        "bicubic spline",                 20  },
    { SWS_X,             "experimental",                    8 },
}

Definition at line 317 of file utils.c.

Referenced by initFilter(), and sws_init_context().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ _DEFAULT_SOURCE

◆ _SVID_SOURCE

◆ _DARWIN_C_SOURCE

◆ attribute_deprecated

◆ LICENSE_PREFIX

◆ USE_MMAP

Function Documentation

◆ handle_formats()

◆ getSplineCoeff()

◆ get_local_pos()

◆ initFilter()

◆ fill_rgb2yuv_table()

◆ fill_xyztables()

◆ handle_jpeg()

◆ handle_0alpha()

◆ handle_xyz()

◆ alloc_gamma_tbl()

◆ alphaless_fmt()

◆ sws_alloc_set_opts()

◆ isnan_vec()

◆ makenan_vec()

◆ sws_dcVec()

◆ sws_getConvVec()

◆ sws_sumVec()

◆ sws_diffVec()

◆ sws_getShiftedVec()

Variable Documentation

◆ format_entries

◆ scale_algorithms