external api for the swscale stuff More...
#include "libavutil/avutil.h"
#include "libavutil/log.h"
#include "libavutil/pixfmt.h"
Go to the source code of this file.
Data Structures | |
struct | SwsVector |
struct | SwsFilter |
Defines | |
#define | LIBSWSCALE_VERSION_MAJOR 2 |
#define | LIBSWSCALE_VERSION_MINOR 1 |
#define | LIBSWSCALE_VERSION_MICRO 100 |
#define | LIBSWSCALE_VERSION_INT |
#define | LIBSWSCALE_VERSION |
#define | LIBSWSCALE_BUILD LIBSWSCALE_VERSION_INT |
#define | LIBSWSCALE_IDENT "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION) |
#define | FF_API_SWS_GETCONTEXT (LIBSWSCALE_VERSION_MAJOR < 3) |
Those FF_API_* defines are not part of public API. | |
#define | FF_API_SWS_CPU_CAPS (LIBSWSCALE_VERSION_MAJOR < 3) |
#define | FF_API_SWS_FORMAT_NAME (LIBSWSCALE_VERSION_MAJOR < 3) |
#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_CPU_CAPS_MMX 0x80000000 |
CPU caps are autodetected now, those flags are only provided for API compatibility. | |
#define | SWS_CPU_CAPS_MMX2 0x20000000 |
#define | SWS_CPU_CAPS_3DNOW 0x40000000 |
#define | SWS_CPU_CAPS_ALTIVEC 0x10000000 |
#define | SWS_CPU_CAPS_BFIN 0x01000000 |
#define | SWS_CPU_CAPS_SSE2 0x02000000 |
#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 |
Functions | |
unsigned | swscale_version (void) |
Return the LIBSWSCALE_VERSION_INT constant. | |
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 PixelFormat pix_fmt) |
Return a positive value if pix_fmt is a supported input format, 0 otherwise. | |
int | sws_isSupportedOutput (enum PixelFormat pix_fmt) |
Return a positive value if pix_fmt is a supported output format, 0 otherwise. | |
struct SwsContext * | sws_alloc_context (void) |
Allocate an empty SwsContext. | |
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 PixelFormat srcFormat, int dstW, int dstH, enum PixelFormat 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_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. | |
SwsVector * | sws_getConstVec (double c, int length) |
Allocate and return a vector with length coefficients, all with the same value c. | |
SwsVector * | sws_getIdentityVec (void) |
Allocate and return a vector with just one coefficient, with value 1.0. | |
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_convVec (SwsVector *a, SwsVector *b) |
void | sws_addVec (SwsVector *a, SwsVector *b) |
void | sws_subVec (SwsVector *a, SwsVector *b) |
void | sws_shiftVec (SwsVector *a, int shift) |
SwsVector * | sws_cloneVec (SwsVector *a) |
Allocate and return a clone of the vector a, that is a vector with the same coefficients as a. | |
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. | |
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 PixelFormat srcFormat, int dstW, int dstH, enum PixelFormat 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. |
external api for the swscale stuff
Definition in file swscale.h.
#define FF_API_SWS_FORMAT_NAME (LIBSWSCALE_VERSION_MAJOR < 3) |
#define FF_API_SWS_GETCONTEXT (LIBSWSCALE_VERSION_MAJOR < 3) |
#define LIBSWSCALE_IDENT "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION) |
#define LIBSWSCALE_VERSION |
#define LIBSWSCALE_VERSION_INT |
#define SWS_CPU_CAPS_MMX 0x80000000 |
struct SwsContext* sws_alloc_context | ( | void | ) | [read] |
Allocate an empty SwsContext.
This must be filled and passed to sws_init_context(). For filling see AVOptions, options.c and sws_setColorspaceDetails().
SwsVector* sws_allocVec | ( | int | length | ) |
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.
With the palette format "ABCD", the destination frame ends up with the format "ABC".
src | source frame buffer | |
dst | destination frame buffer | |
num_pixels | number of pixels to convert | |
palette | array with [256] entries, which must match color arrangement (RGB or BGR) of src |
Definition at line 1075 of file swscale_unscaled.c.
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.
The output frame will have the same packed format as the palette.
src | source frame buffer | |
dst | destination frame buffer | |
num_pixels | number of pixels to convert | |
palette | array with [256] entries, which must match color arrangement (RGB or BGR) of src |
Definition at line 1065 of file swscale_unscaled.c.
void sws_freeContext | ( | struct SwsContext * | swsContext | ) |
const AVClass* sws_get_class | ( | void | ) |
Get the AVClass for swsContext.
It can be used in combination with AV_OPT_SEARCH_FAKE_OBJ for examining options.
struct SwsContext* sws_getCachedContext | ( | struct SwsContext * | context, | |
int | srcW, | |||
int | srcH, | |||
enum PixelFormat | srcFormat, | |||
int | dstW, | |||
int | dstH, | |||
enum PixelFormat | dstFormat, | |||
int | flags, | |||
SwsFilter * | srcFilter, | |||
SwsFilter * | dstFilter, | |||
const double * | param | |||
) | [read] |
Check if context can be reused, otherwise reallocate a new one.
If context is NULL, just calls sws_getContext() to get a new context. Otherwise, checks if the parameters are the ones already saved in context. If that is the case, returns the current context. Otherwise, frees context and gets a new context with the new parameters.
Be warned that srcFilter and dstFilter are not checked, they are assumed to remain the same.
const int* sws_getCoefficients | ( | int | colorspace | ) |
Return a pointer to yuv<->rgb coefficients for the given colorspace suitable for sws_setColorspaceDetails().
colorspace | One of the SWS_CS_* macros. If invalid, SWS_CS_DEFAULT is used. |
int sws_getColorspaceDetails | ( | struct SwsContext * | c, | |
int ** | inv_table, | |||
int * | srcRange, | |||
int ** | table, | |||
int * | dstRange, | |||
int * | brightness, | |||
int * | contrast, | |||
int * | saturation | |||
) |
SwsVector* sws_getConstVec | ( | double | c, | |
int | length | |||
) |
struct SwsContext* sws_getContext | ( | int | srcW, | |
int | srcH, | |||
enum PixelFormat | srcFormat, | |||
int | dstW, | |||
int | dstH, | |||
enum PixelFormat | dstFormat, | |||
int | flags, | |||
SwsFilter * | srcFilter, | |||
SwsFilter * | dstFilter, | |||
const double * | param | |||
) | [read] |
Allocate and return an SwsContext.
You need it to perform scaling/conversion operations using sws_scale().
srcW | the width of the source image | |
srcH | the height of the source image | |
srcFormat | the source image format | |
dstW | the width of the destination image | |
dstH | the height of the destination image | |
dstFormat | the destination image format | |
flags | specify which algorithm and options to use for rescaling |
Definition at line 1143 of file utils.c.
Referenced by allocStuff(), config_props(), do_video_resample(), doTest(), init_opts(), main(), sws_getContextFromCmdLine(), and write_video_frame().
SwsFilter* sws_getDefaultFilter | ( | float | lumaGBlur, | |
float | chromaGBlur, | |||
float | lumaSharpen, | |||
float | chromaSharpen, | |||
float | chromaHShift, | |||
float | chromaVShift, | |||
int | verbose | |||
) |
SwsVector* sws_getGaussianVec | ( | double | variance, | |
double | quality | |||
) |
SwsVector* sws_getIdentityVec | ( | void | ) |
int sws_init_context | ( | struct SwsContext * | sws_context, | |
SwsFilter * | srcFilter, | |||
SwsFilter * | dstFilter | |||
) |
int sws_isSupportedInput | ( | enum PixelFormat | pix_fmt | ) |
int sws_isSupportedOutput | ( | enum PixelFormat | pix_fmt | ) |
void sws_normalizeVec | ( | SwsVector * | a, | |
double | height | |||
) |
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.
A slice is a sequence of consecutive rows in an image.
Slices have to be provided in sequential order, either in top-bottom or bottom-top order. If slices are provided in non-sequential order the behavior of the function is undefined.
c | the scaling context previously created with sws_getContext() | |
srcSlice | the array containing the pointers to the planes of the source slice | |
srcStride | the array containing the strides for each plane of the source image | |
srcSliceY | the position in the source image of the slice to process, that is the number (counted starting from zero) in the image of the first row of the slice | |
srcSliceH | the height of the source slice, that is the number of rows in the slice | |
dst | the array containing the pointers to the planes of the destination image | |
dstStride | the array containing the strides for each plane of the destination image |
Scale the image slice in srcSlice and put the resulting scaled slice in the image in dst.
Assumes planar YUV to be in YUV order instead of YVU.
Definition at line 906 of file swscale_unscaled.c.
void sws_scaleVec | ( | SwsVector * | a, | |
double | scalar | |||
) |
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 | |||
) |
const char* swscale_configuration | ( | void | ) |
const char* swscale_license | ( | void | ) |