#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/avutil.h"#include "libavutil/bswap.h"#include "libavutil/cpu.h"#include "libavutil/intreadwrite.h"#include "libavutil/mathematics.h"#include "libavutil/opt.h"#include "libavutil/pixdesc.h"#include "libavutil/x86/asm.h"#include "libavutil/x86/cpu.h"#include "rgb2rgb.h"#include "swscale.h"#include "swscale_internal.h"Go to the source code of this file.
Data Structures | |
| struct | FormatEntry |
Defines | |
| #define | _SVID_SOURCE |
| #define | _DARWIN_C_SOURCE |
| #define | LICENSE_PREFIX "libswscale license: " |
| #define | RET 0xC3 |
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. | |
| 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. | |
| const char * | sws_format_name (enum PixelFormat format) |
| static double | getSplineCoeff (double a, double b, double c, double d, double dist) |
| static 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]) |
| static void | getSubSampleFactors (int *h, int *v, enum PixelFormat format) |
| 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) |
| static int | handle_jpeg (enum PixelFormat *format) |
| static int | handle_0alpha (enum PixelFormat *format) |
| SwsContext * | sws_alloc_context (void) |
| Allocate an empty SwsContext. | |
| av_cold int | sws_init_context (SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter) |
| Initialize the swscaler context sws_context. | |
| 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. | |
| SwsFilter * | sws_getDefaultFilter (float lumaGBlur, float chromaGBlur, float lumaSharpen, float chromaSharpen, float chromaHShift, float chromaVShift, int verbose) |
| 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. | |
| static double | sws_dcVec (SwsVector *a) |
| 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. | |
| static SwsVector * | sws_getConvVec (SwsVector *a, SwsVector *b) |
| static SwsVector * | sws_sumVec (SwsVector *a, SwsVector *b) |
| static SwsVector * | sws_diffVec (SwsVector *a, SwsVector *b) |
| static SwsVector * | sws_getShiftedVec (SwsVector *a, int shift) |
| void | sws_shiftVec (SwsVector *a, int shift) |
| void | sws_addVec (SwsVector *a, SwsVector *b) |
| void | sws_subVec (SwsVector *a, SwsVector *b) |
| void | sws_convVec (SwsVector *a, SwsVector *b) |
| 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) |
| void | sws_freeFilter (SwsFilter *filter) |
| void | sws_freeContext (SwsContext *c) |
| Free the swscaler context swsContext. | |
| 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. | |
Variables | |
| static const FormatEntry | format_entries [PIX_FMT_NB] |
| const int32_t | ff_yuv2rgb_coeffs [8][4] |
| #define LICENSE_PREFIX "libswscale license: " |
| static double getSplineCoeff | ( | double | a, | |
| double | b, | |||
| double | c, | |||
| double | d, | |||
| double | dist | |||
| ) | [static] |
| static void getSubSampleFactors | ( | int * | h, | |
| int * | v, | |||
| enum PixelFormat | format | |||
| ) | [static] |
| static int handle_0alpha | ( | enum PixelFormat * | format | ) | [static] |
Definition at line 840 of file utils.c.
Referenced by sws_getCachedContext(), sws_getContext(), and sws_init_context().
| static int handle_jpeg | ( | enum PixelFormat * | format | ) | [static] |
Definition at line 820 of file utils.c.
Referenced by sws_getCachedContext(), sws_getContext(), and sws_init_context().
| 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().
Definition at line 851 of file utils.c.
Referenced by sws_getCachedContext(), and sws_getContext().
Allocate and return an uninitialized vector with length coefficients.
Definition at line 1405 of file utils.c.
Referenced by sws_cloneVec(), sws_getConstVec(), and sws_getGaussianVec().
| static double sws_dcVec | ( | SwsVector * | a | ) | [static] |
| const char* sws_format_name | ( | enum PixelFormat | format | ) |
| void sws_freeContext | ( | struct SwsContext * | swsContext | ) |
Free the swscaler context swsContext.
If swsContext is NULL, then does nothing.
Definition at line 1652 of file utils.c.
Referenced by config_props(), doTest(), ff_scale_image(), freeBuffers(), main(), stream_close(), sws_getCachedContext(), sws_getContext(), uninit(), and uninit_opts().
| void sws_freeVec | ( | SwsVector * | a | ) |
Definition at line 1627 of file utils.c.
Referenced by alloc_sws_context(), allocStuff(), sws_freeFilter(), and sws_getDefaultFilter().
| 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.
Definition at line 1716 of file utils.c.
Referenced by alloc_sws_context(), and queue_picture().
Allocate and return a vector with length coefficients, all with the same value c.
Definition at line 1438 of file utils.c.
Referenced by sws_diffVec(), sws_getConvVec(), sws_getIdentityVec(), sws_getShiftedVec(), and sws_sumVec().
| 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 1304 of file utils.c.
Referenced by allocStuff(), config_props(), doTest(), ff_scale_image(), init_opts(), main(), sws_getContextFromCmdLine(), and write_video_frame().
| 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.
Definition at line 1417 of file utils.c.
Referenced by alloc_sws_context(), allocStuff(), and sws_getDefaultFilter().
| SwsVector* sws_getIdentityVec | ( | void | ) |
Allocate and return a vector with just one coefficient, with value 1.0.
Definition at line 1452 of file utils.c.
Referenced by sws_getDefaultFilter().
| av_cold int sws_init_context | ( | struct SwsContext * | sws_context, | |
| SwsFilter * | srcFilter, | |||
| SwsFilter * | dstFilter | |||
| ) |
Initialize the swscaler context sws_context.
Definition at line 861 of file utils.c.
Referenced by sws_getCachedContext(), and sws_getContext().
| int sws_isSupportedInput | ( | enum PixelFormat | pix_fmt | ) |
| int sws_isSupportedOutput | ( | enum PixelFormat | pix_fmt | ) |
| void sws_normalizeVec | ( | SwsVector * | a, | |
| double | height | |||
| ) |
Scale all the coefficients of a so that their sum equals height.
Definition at line 1476 of file utils.c.
Referenced by sws_getDefaultFilter(), and sws_getGaussianVec().
Print with av_log() a textual representation of the vector a if log_level <= av_log_level.
Definition at line 1601 of file utils.c.
Referenced by sws_getDefaultFilter().
| void sws_scaleVec | ( | SwsVector * | a, | |
| double | scalar | |||
| ) |
Scale all the coefficients of a by the scalar value.
Definition at line 1468 of file utils.c.
Referenced by alloc_sws_context(), sws_getDefaultFilter(), and sws_normalizeVec().
| 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 | |||
| ) |
| dstRange | flag indicating the while-black range of the output (1=jpeg / 0=mpeg) | |
| srcRange | flag indicating the while-black range of the input (1=jpeg / 0=mpeg) | |
| table | the yuv2rgb coefficients describing the output yuv space, normally ff_yuv2rgb_coeffs[x] | |
| inv_table | the yuv2rgb coefficients describing the input yuv space, normally ff_yuv2rgb_coeffs[x] | |
| brightness | 16.16 fixed point brightness correction | |
| contrast | 16.16 fixed point contrast correction | |
| saturation | 16.16 fixed point saturation correction |
Definition at line 774 of file utils.c.
Referenced by sws_getCachedContext(), and sws_getContext().
| const char* swscale_configuration | ( | void | ) |
| const char* swscale_license | ( | void | ) |
| unsigned swscale_version | ( | void | ) |
| const int32_t ff_yuv2rgb_coeffs[8][4] |
Definition at line 45 of file yuv2rgb.c.
Referenced by sws_getCachedContext(), sws_getCoefficients(), and sws_getContext().
const FormatEntry format_entries[PIX_FMT_NB] [static] |
1.5.8