swscale.h File Reference

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

Go to the source code of this file.

Data Structures
struct	SwsVector
struct	SwsFilter

Macros
#define	SWS_FAST_BILINEAR   1
#define	SWS_BILINEAR   2
#define	SWS_BICUBIC   4
#define	SWS_X   8
#define	SWS_POINT   0x10
#define	SWS_AREA   0x20
#define	SWS_BICUBLIN   0x40
#define	SWS_GAUSS   0x80
#define	SWS_SINC   0x100
#define	SWS_LANCZOS   0x200
#define	SWS_SPLINE   0x400
#define	SWS_SRC_V_CHR_DROP_MASK   0x30000
#define	SWS_SRC_V_CHR_DROP_SHIFT   16
#define	SWS_PARAM_DEFAULT   123456
#define	SWS_PRINT_INFO   0x1000
#define	SWS_FULL_CHR_H_INT   0x2000
#define	SWS_FULL_CHR_H_INP   0x4000
#define	SWS_DIRECT_BGR   0x8000
#define	SWS_ACCURATE_RND   0x40000
#define	SWS_BITEXACT   0x80000
#define	SWS_ERROR_DIFFUSION   0x800000
#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

Functions
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...
const int *	sws_getCoefficients (int colorspace)
	Return a pointer to yuv<->rgb coefficients for the given colorspace suitable for sws_setColorspaceDetails(). 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)
struct SwsContext *	sws_alloc_context (void)
	Allocate an empty SwsContext. More...
av_warn_unused_result int	sws_init_context (struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter)
	Initialize the swscaler context sws_context. More...
void	sws_freeContext (struct SwsContext *swsContext)
	Free the swscaler context swsContext. More...
struct 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...
int	sws_scale (struct 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. More...
int	sws_scale_frame (struct SwsContext *c, AVFrame *dst, const AVFrame *src)
	Scale source data from src and write the output to dst. More...
int	sws_frame_start (struct SwsContext *c, AVFrame *dst, const AVFrame *src)
	Initialize the scaling process for a given pair of source/destination frames. More...
void	sws_frame_end (struct SwsContext *c)
	Finish the scaling process for a pair of source/destination frames previously submitted with sws_frame_start(). More...
int	sws_send_slice (struct 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(). More...
int	sws_receive_slice (struct 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(). More...
unsigned int	sws_receive_slice_alignment (const struct SwsContext *c)
	Get the alignment required for slices. More...
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)
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...
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...
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)
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...
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. More...
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. More...
const AVClass *	sws_get_class (void)
	Get the AVClass for swsContext. More...

Detailed Description

external API header

Definition in file swscale.h.