external API header More...

#include <stdint.h>
#include "libavutil/avutil.h"
#include "libavutil/frame.h"
#include "libavutil/log.h"
#include "libavutil/pixfmt.h"
#include "version_major.h"
#include "version.h"

Data Structures
struct	SwsContext
	Main external API structure. More...
struct	SwsVector
struct	SwsFilter

Macros
#define	SWS_SRC_V_CHR_DROP_MASK 0x30000
#define	SWS_SRC_V_CHR_DROP_SHIFT 16
#define	SWS_PARAM_DEFAULT 123456
#define	SWS_MAX_REDUCE_CUTOFF 0.002
#define	SWS_CS_ITU709 1
#define	SWS_CS_FCC 4
#define	SWS_CS_ITU601 5
#define	SWS_CS_ITU624 5
#define	SWS_CS_SMPTE170M 5
#define	SWS_CS_SMPTE240M 7
#define	SWS_CS_DEFAULT 5
#define	SWS_CS_BT2020 9

Enumerations
enum	SwsDither { SWS_DITHER_NONE = 0 , SWS_DITHER_AUTO , SWS_DITHER_BAYER , SWS_DITHER_ED , SWS_DITHER_A_DITHER , SWS_DITHER_X_DITHER , SWS_DITHER_NB }
enum	SwsAlphaBlend { SWS_ALPHA_BLEND_NONE = 0 , SWS_ALPHA_BLEND_UNIFORM , SWS_ALPHA_BLEND_CHECKERBOARD , SWS_ALPHA_BLEND_NB }
enum	SwsFlags { SWS_FAST_BILINEAR = 1 << 0 , SWS_BILINEAR = 1 << 1 , SWS_BICUBIC = 1 << 2 , SWS_X = 1 << 3 , SWS_POINT = 1 << 4 , SWS_AREA = 1 << 5 , SWS_BICUBLIN = 1 << 6 , SWS_GAUSS = 1 << 7 , SWS_SINC = 1 << 8 , SWS_LANCZOS = 1 << 9 , SWS_SPLINE = 1 << 10 , SWS_STRICT = 1 << 11 , SWS_PRINT_INFO = 1 << 12 , SWS_FULL_CHR_H_INT = 1 << 13 , SWS_FULL_CHR_H_INP = 1 << 14 , SWS_ACCURATE_RND = 1 << 18 , SWS_BITEXACT = 1 << 19 , SWS_DIRECT_BGR = 1 << 15 , SWS_ERROR_DIFFUSION = 1 << 23 }
enum	SwsIntent { SWS_INTENT_PERCEPTUAL = 0 , SWS_INTENT_RELATIVE_COLORIMETRIC = 1 , SWS_INTENT_SATURATION = 2 , SWS_INTENT_ABSOLUTE_COLORIMETRIC = 3 , SWS_INTENT_NB }

Functions
unsigned	swscale_version (void)
const char *	swscale_configuration (void)
	Return the libswscale build-time configuration.
const char *	swscale_license (void)
	Return the libswscale license.
const AVClass *	sws_get_class (void)
	Get the AVClass for SwsContext.
SwsContext *	sws_alloc_context (void)
	Allocate an empty SwsContext and set its fields to default values.
void	sws_free_context (SwsContext **ctx)
	Free the context and everything associated with it, and write NULL to the provided pointer.
int	sws_test_format (enum AVPixelFormat format, int output)
	Test if a given pixel format is supported.
int	sws_test_colorspace (enum AVColorSpace colorspace, int output)
	Test if a given color space is supported.
int	sws_test_primaries (enum AVColorPrimaries primaries, int output)
	Test if a given set of color primaries is supported.
int	sws_test_transfer (enum AVColorTransferCharacteristic trc, int output)
	Test if a given color transfer function is supported.
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.
int	sws_frame_setup (SwsContext ctx, const AVFrame dst, const AVFrame *src)
	Like sws_scale_frame, but without actually scaling.
int	sws_is_noop (const AVFrame dst, const AVFrame src)
	Check if a given conversion is a noop.
int	sws_scale_frame (SwsContext c, AVFrame dst, const AVFrame *src)
	Scale source data from src and write the output to dst.
const int *	sws_getCoefficients (int colorspace)
	Return a pointer to yuv<->rgb coefficients for the given colorspace suitable for sws_setColorspaceDetails().
int	sws_isSupportedInput (enum AVPixelFormat pix_fmt)
	Return a positive value if pix_fmt is a supported input format, 0 otherwise.
int	sws_isSupportedOutput (enum AVPixelFormat pix_fmt)
	Return a positive value if pix_fmt is a supported output format, 0 otherwise.
int	sws_isSupportedEndiannessConversion (enum AVPixelFormat pix_fmt)
av_warn_unused_result int	sws_init_context (SwsContext sws_context, SwsFilter srcFilter, SwsFilter *dstFilter)
	Initialize the swscaler context sws_context.
void	sws_freeContext (SwsContext *swsContext)
	Free the swscaler context swsContext.
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.
int	sws_scale (SwsContext c, const uint8_t const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])
	Scale the image slice in srcSlice and put the resulting scaled slice in the image in dst.
int	sws_frame_start (SwsContext c, AVFrame dst, const AVFrame *src)
	Initialize the scaling process for a given pair of source/destination frames.
void	sws_frame_end (SwsContext *c)
	Finish the scaling process for a pair of source/destination frames previously submitted with sws_frame_start().
int	sws_send_slice (SwsContext *c, unsigned int slice_start, unsigned int slice_height)
	Indicate that a horizontal slice of input data is available in the source frame previously provided to sws_frame_start().
int	sws_receive_slice (SwsContext *c, unsigned int slice_start, unsigned int slice_height)
	Request a horizontal slice of the output data to be written into the frame previously provided to sws_frame_start().
unsigned int	sws_receive_slice_alignment (const SwsContext *c)
	Get the alignment required for slices.
int	sws_setColorspaceDetails (SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
int	sws_getColorspaceDetails (SwsContext c, int inv_table, int srcRange, int *table, int dstRange, int brightness, int contrast, int *saturation)
SwsVector *	sws_allocVec (int length)
	Allocate and return an uninitialized vector with length coefficients.
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.
void	sws_scaleVec (SwsVector *a, double scalar)
	Scale all the coefficients of a by the scalar value.
void	sws_normalizeVec (SwsVector *a, double height)
	Scale all the coefficients of a so that their sum equals height.
void	sws_freeVec (SwsVector *a)
SwsFilter *	sws_getDefaultFilter (float lumaGBlur, float chromaGBlur, float lumaSharpen, float chromaSharpen, float chromaHShift, float chromaVShift, int verbose)
void	sws_freeFilter (SwsFilter *filter)
SwsContext *	sws_getCachedContext (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.
void	sws_convertPalette8ToPacked32 (const uint8_t src, uint8_t dst, int num_pixels, const uint8_t *palette)
	Convert an 8-bit paletted frame into a frame with a color depth of 32 bits.
void	sws_convertPalette8ToPacked24 (const uint8_t src, uint8_t dst, int num_pixels, const uint8_t *palette)
	Convert an 8-bit paletted frame into a frame with a color depth of 24 bits.

Detailed Description

external API header

Definition in file swscale.h.

Data Structures

Macros

Enumerations

Functions

Detailed Description