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/csp.h"
#include "libavutil/emms.h"
#include "libavutil/hdr_dynamic_metadata.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/libm.h"
#include "libavutil/mastering_display_metadata.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...
static int	infer_prim_ref (SwsColor *csp, const SwsColor *ref)
static int	infer_trc_ref (SwsColor *csp, const SwsColor *ref)
int	ff_infer_colors (SwsColor *src, SwsColor *dst)
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 295 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 319 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 394 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 407 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 436 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 845 of file utils.c.

Referenced by sws_setColorspaceDetails().

fill_xyztables()

static void fill_xyztables ( SwsInternal *  c )

static

Definition at line 939 of file utils.c.

Referenced by handle_formats().

handle_jpeg()

static int handle_jpeg ( enum AVPixelFormat *  format )

static

Definition at line 975 of file utils.c.

Referenced by sws_init_context().

handle_0alpha()

static int handle_0alpha ( enum AVPixelFormat *  format )

static

Definition at line 1013 of file utils.c.

Referenced by handle_formats().

handle_xyz()

static int handle_xyz ( enum AVPixelFormat *  format )

static

Definition at line 1024 of file utils.c.

Referenced by handle_formats().

handle_formats()

static void handle_formats ( SwsContext *  sws )

static

Definition at line 1033 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 1044 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 1244 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 1258 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 1319 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 2037 of file utils.c.

Referenced by sws_init_context().

isnan_vec()

static int isnan_vec ( SwsVector *  a )

static

Definition at line 2140 of file utils.c.

Referenced by sws_getDefaultFilter().

makenan_vec()

static void makenan_vec ( SwsVector *  a )

static

Definition at line 2149 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 2204 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 2223 of file utils.c.

Referenced by sws_getDefaultFilter().

sws_dcVec()

static double sws_dcVec ( SwsVector *  a )

static

Definition at line 2228 of file utils.c.

Referenced by sws_normalizeVec().

sws_sumVec()

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

static

Definition at line 2252 of file utils.c.

Referenced by sws_addVec().

sws_getShiftedVec()

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

static

Definition at line 2270 of file utils.c.

Referenced by sws_shiftVec().

sws_shiftVec()

static void sws_shiftVec ( SwsVector *  a, int  shift  )

static

Definition at line 2288 of file utils.c.

Referenced by sws_getDefaultFilter().

sws_addVec()

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

static

Definition at line 2302 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 2320 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 2592 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.

Calculate largest value from histogram to use as fallback for clips with missing MaxSCL information. Note that this may end up picking the "reserved" value at the 5% percentile, which in practice appears to track the brightest pixel in the scene.

Definition at line 2656 of file utils.c.

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

infer_prim_ref()

static int infer_prim_ref ( SwsColor *  csp, const SwsColor *  ref  )

static

Definition at line 2808 of file utils.c.

Referenced by ff_infer_colors().

infer_trc_ref()

static int infer_trc_ref ( SwsColor *  csp, const SwsColor *  ref  )

static

Definition at line 2832 of file utils.c.

Referenced by ff_infer_colors().

ff_infer_colors()

int ff_infer_colors	(	SwsColor *	src,
		SwsColor *	dst
	)

Definition at line 2857 of file utils.c.

Referenced by adapt_colors().

test_range()

static int test_range ( enum AVColorRange  range )

static

Definition at line 2909 of file utils.c.

Referenced by ff_test_fmt().

test_loc()

static int test_loc ( enum AVChromaLocation  loc )

static

Definition at line 2914 of file utils.c.

Referenced by ff_test_fmt().

ff_test_fmt()

int ff_test_fmt	(	const SwsFormat *	fmt,
		int	output
	)

Definition at line 2919 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 75 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 422 of file utils.c.

Referenced by ff_sws_init_single_context(), and initFilter().