utils.c File Reference

#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/cpu.h"
#include "libavutil/emms.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/libm.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/slicethread.h"
#include "libavutil/thread.h"
#include "libavutil/aarch64/cpu.h"
#include "libavutil/ppc/cpu.h"
#include "libavutil/x86/asm.h"
#include "libavutil/x86/cpu.h"
#include "libavutil/loongarch/cpu.h"
#include "rgb2rgb.h"
#include "swscale.h"
#include "swscale_internal.h"
#include "utils.h"
#include "graph.h"

Go to the source code of this file.

Data Structures
struct	FormatEntry
struct	ScaleAlgorithm

Macros
#define	_DEFAULT_SOURCE
#define	_SVID_SOURCE
#define	_DARWIN_C_SOURCE
#define	USE_MMAP   0

Functions
static SwsContext *	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 without performing initialization. More...
int	ff_shuffle_filter_coefficients (SwsInternal *c, int *filterPos, int filterSize, int16_t *filter, int dstW)
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 (SwsInternal *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 (SwsInternal *c, const int table[4], int dstRange)
static void	fill_xyztables (SwsInternal *c)
static int	handle_jpeg (enum AVPixelFormat *format)
static int	handle_0alpha (enum AVPixelFormat *format)
static int	handle_xyz (enum AVPixelFormat *format)
static void	handle_formats (SwsContext *sws)
static int	range_override_needed (enum AVPixelFormat format)
int	sws_setColorspaceDetails (SwsContext *sws, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
int	sws_getColorspaceDetails (SwsContext *sws, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
SwsContext *	sws_alloc_context (void)
	Allocate an empty SwsContext and set its fields to default values. More...
static uint16_t *	alloc_gamma_tbl (double e)
static enum AVPixelFormat	alphaless_fmt (enum AVPixelFormat fmt)
av_cold int	ff_sws_init_single_context (SwsContext *sws, SwsFilter *srcFilter, SwsFilter *dstFilter)
static int	context_init_threaded (SwsContext *sws, SwsFilter *src_filter, SwsFilter *dst_filter)
av_cold int	sws_init_context (SwsContext *sws, SwsFilter *srcFilter, SwsFilter *dstFilter)
	Initialize the swscaler context sws_context. 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)
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...
static SwsVector *	sws_getConstVec (double c, int length)
	Allocate and return a vector with length coefficients, all with the same value c. More...
static 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_sumVec (SwsVector *a, SwsVector *b)
static SwsVector *	sws_getShiftedVec (SwsVector *a, int shift)
static void	sws_shiftVec (SwsVector *a, int shift)
static void	sws_addVec (SwsVector *a, SwsVector *b)
static 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)
SwsFilter *	sws_getDefaultFilter (float lumaGBlur, float chromaGBlur, float lumaSharpen, float chromaSharpen, float chromaHShift, float chromaVShift, int verbose)
void	sws_freeContext (SwsContext *sws)
	Free the swscaler context swsContext. More...
void	sws_free_context (SwsContext **pctx)
	Free the context and everything associated with it, and write NULL to the provided pointer. More...
SwsContext *	sws_getCachedContext (SwsContext *prev, 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...
int	ff_range_add (RangeList *rl, unsigned int start, unsigned int len)
SwsFormat	ff_fmt_from_frame (const AVFrame *frame, int field)
	This function also sanitizes and strips the input data, removing irrelevant fields for certain formats. More...
int	sws_test_format (enum AVPixelFormat format, int output)
	Test if a given pixel format is supported. More...
int	sws_test_colorspace (enum AVColorSpace csp, int output)
	Test if a given color space is supported. More...
int	sws_test_primaries (enum AVColorPrimaries prim, int output)
	Test if a given set of color primaries is supported. More...
int	sws_test_transfer (enum AVColorTransferCharacteristic trc, int output)
	Test if a given color transfer function is supported. More...
static int	test_range (enum AVColorRange range)
static int	test_loc (enum AVChromaLocation loc)
int	ff_test_fmt (const SwsFormat *fmt, int output)
int	sws_test_frame (const AVFrame *frame, int output)
	Helper function to run all sws_test_* against a frame, as well as testing the basic frame properties for sanity. More...
int	sws_is_noop (const AVFrame *dst, const AVFrame *src)
	Check if a given conversion is a noop. More...

Variables
static const FormatEntry	format_entries []
static const ScaleAlgorithm	scale_algorithms []

Macro Definition Documentation

_DEFAULT_SOURCE

#define _DEFAULT_SOURCE

Definition at line 24 of file utils.c.

_SVID_SOURCE

#define _SVID_SOURCE

Definition at line 25 of file utils.c.

_DARWIN_C_SOURCE

#define _DARWIN_C_SOURCE

Definition at line 26 of file utils.c.

USE_MMAP

#define USE_MMAP   0

Function Documentation

alloc_set_opts()

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

static

Allocate and return an SwsContext without performing initialization.

Definition at line 292 of file utils.c.

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

ff_shuffle_filter_coefficients()

int ff_shuffle_filter_coefficients	(	SwsInternal *	c,
		int *	filterPos,
		int	filterSize,
		int16_t *	filter,
		int	dstW
	)

Definition at line 316 of file utils.c.

Referenced by check_hscale(), and ff_sws_init_single_context().

getSplineCoeff()

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

static

Definition at line 391 of file utils.c.

Referenced by initFilter().

get_local_pos()

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

static

Definition at line 404 of file utils.c.

Referenced by ff_sws_init_single_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 433 of file utils.c.

Referenced by ff_sws_init_single_context().

fill_rgb2yuv_table()

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

static

dstRange &&

Definition at line 842 of file utils.c.

Referenced by sws_setColorspaceDetails().

fill_xyztables()

static void fill_xyztables ( SwsInternal *  c )

static

Definition at line 936 of file utils.c.

Referenced by handle_formats().

handle_jpeg()

static int handle_jpeg ( enum AVPixelFormat *  format )

static

Definition at line 972 of file utils.c.

Referenced by sws_init_context().

handle_0alpha()

static int handle_0alpha ( enum AVPixelFormat *  format )

static

Definition at line 1010 of file utils.c.

Referenced by handle_formats().

handle_xyz()

static int handle_xyz ( enum AVPixelFormat *  format )

static

Definition at line 1021 of file utils.c.

Referenced by handle_formats().

handle_formats()

static void handle_formats ( SwsContext *  sws )

static

Definition at line 1030 of file utils.c.

Referenced by ff_sws_init_single_context(), and sws_setColorspaceDetails().

range_override_needed()

static int range_override_needed ( enum AVPixelFormat  format )

static

Definition at line 1041 of file utils.c.

Referenced by sws_getColorspaceDetails(), and sws_setColorspaceDetails().

alloc_gamma_tbl()

static uint16_t* alloc_gamma_tbl ( double  e )

static

Definition at line 1241 of file utils.c.

Referenced by ff_sws_init_single_context().

alphaless_fmt()

static enum AVPixelFormat alphaless_fmt ( enum AVPixelFormat  fmt )

static

Definition at line 1255 of file utils.c.

Referenced by ff_sws_init_single_context().

ff_sws_init_single_context()

av_cold int ff_sws_init_single_context	(	SwsContext *	sws,
		SwsFilter *	srcFilter,
		SwsFilter *	dstFilter
	)

Definition at line 1316 of file utils.c.

Referenced by context_init_threaded(), init_legacy_subpass(), and sws_init_context().

context_init_threaded()

static int context_init_threaded ( SwsContext *  sws, SwsFilter *  src_filter, SwsFilter *  dst_filter  )

static

Definition at line 2034 of file utils.c.

Referenced by sws_init_context().

isnan_vec()

static int isnan_vec ( SwsVector *  a )

static

Definition at line 2137 of file utils.c.

Referenced by sws_getDefaultFilter().

makenan_vec()

static void makenan_vec ( SwsVector *  a )

static

Definition at line 2146 of file utils.c.

Referenced by sws_addVec(), and sws_shiftVec().

sws_getConstVec()

static SwsVector* sws_getConstVec ( double  c, int  length  )

static

Allocate and return a vector with length coefficients, all with the same value c.

Definition at line 2201 of file utils.c.

Referenced by sws_getIdentityVec(), sws_getShiftedVec(), and sws_sumVec().

sws_getIdentityVec()

static SwsVector* sws_getIdentityVec ( void  )

static

Allocate and return a vector with just one coefficient, with value 1.0.

Definition at line 2220 of file utils.c.

Referenced by sws_getDefaultFilter().

sws_dcVec()

static double sws_dcVec ( SwsVector *  a )

static

Definition at line 2225 of file utils.c.

Referenced by sws_normalizeVec().

sws_sumVec()

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

static

Definition at line 2249 of file utils.c.

Referenced by sws_addVec().

sws_getShiftedVec()

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

static

Definition at line 2267 of file utils.c.

Referenced by sws_shiftVec().

sws_shiftVec()

static void sws_shiftVec ( SwsVector *  a, int  shift  )

static

Definition at line 2285 of file utils.c.

Referenced by sws_getDefaultFilter().

sws_addVec()

static void sws_addVec ( SwsVector *  a, SwsVector *  b  )

static

Definition at line 2299 of file utils.c.

Referenced by sws_getDefaultFilter().

sws_printVec2()

static void sws_printVec2 ( SwsVector *  a, AVClass *  log_ctx, int  log_level  )

static

Print with av_log() a textual representation of the vector a if log_level <= av_log_level.

Definition at line 2317 of file utils.c.

Referenced by sws_getDefaultFilter().

ff_range_add()

int ff_range_add	(	RangeList *	rl,
		unsigned int	start,
		unsigned int	len
	)

Definition at line 2589 of file utils.c.

Referenced by sws_send_slice().

ff_fmt_from_frame()

SwsFormat ff_fmt_from_frame	(	const AVFrame *	frame,
		int	field
	)

This function also sanitizes and strips the input data, removing irrelevant fields for certain formats.

Definition at line 2653 of file utils.c.

Referenced by sws_frame_setup(), sws_is_noop(), and sws_test_frame().

test_range()

static int test_range ( enum AVColorRange  range )

static

Definition at line 2745 of file utils.c.

Referenced by ff_test_fmt().

test_loc()

static int test_loc ( enum AVChromaLocation  loc )

static

Definition at line 2750 of file utils.c.

Referenced by ff_test_fmt().

ff_test_fmt()

int ff_test_fmt	(	const SwsFormat *	fmt,
		int	output
	)

Definition at line 2755 of file utils.c.

Referenced by sws_frame_setup(), and sws_test_frame().

Variable Documentation

format_entries

const FormatEntry format_entries[]

static

Definition at line 72 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 419 of file utils.c.

Referenced by ff_sws_init_single_context(), and initFilter().