Loading...
Searching...
No Matches
swscale.h File Reference
libswscale

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"`

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
| Perform full chroma upsampling when upscaling to RGB.
#define | SWS_FULL_CHR_H_INP 0x4000
| Perform full chroma interpolation when downscaling RGB sources.
#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.
const char * | swscale_license (void)
| Return the libswscale license.
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)
struct SwsContext * | sws_alloc_context (void)
| Allocate an empty SwsContext.
av_warn_unused_result int | sws_init_context (struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter)
| Initialize the swscaler context sws_context.
void | sws_freeContext (struct SwsContext *swsContext)
| Free the swscaler context swsContext.
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.
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.
int | sws_scale_frame (struct SwsContext *c, AVFrame *dst, const AVFrame *src)
| Scale source data from src and write the output to dst.
int | sws_frame_start (struct SwsContext *c, AVFrame *dst, const AVFrame *src)
| Initialize the scaling process for a given pair of source/destination frames.
void | sws_frame_end (struct SwsContext *c)
| Finish the scaling process for a pair of source/destination frames previously submitted with sws_frame_start().
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().
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().
unsigned int | sws_receive_slice_alignment (const struct SwsContext *c)
| Get the alignment required for slices.
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.
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)
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.
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.
const AVClass * | sws_get_class (void)
| Get the AVClass for swsContext.

## Detailed Description

external API header

Definition in file swscale.h.