#include <inttypes.h>#include <string.h>#include <math.h>#include <stdio.h>#include "config.h"#include <assert.h>#include "swscale.h"#include "swscale_internal.h"#include "rgb2rgb.h"#include "libavutil/intreadwrite.h"#include "libavutil/x86_cpu.h"#include "libavutil/cpu.h"#include "libavutil/avutil.h"#include "libavutil/bswap.h"#include "libavutil/mathematics.h"#include "libavutil/opt.h"#include "libavutil/pixdesc.h"#include "libavutil/avassert.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) |
| Returns the LIBSWSCALE_VERSION_INT constant. | |
| const char * | swscale_configuration (void) |
| Returns the libswscale build-time configuration. | |
| const char * | swscale_license (void) |
| Returns the libswscale license. | |
| int | sws_isSupportedInput (enum PixelFormat pix_fmt) |
| Returns a positive value if pix_fmt is a supported input format, 0 otherwise. | |
| int | sws_isSupportedOutput (enum PixelFormat pix_fmt) |
| Returns 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, int16_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) |
| SwsContext * | sws_alloc_context (void) |
| Allocates an empty SwsContext. | |
| int | sws_init_context (SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter) |
| Initializes 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) |
| Allocates and returns a SwsContext. | |
| SwsFilter * | sws_getDefaultFilter (float lumaGBlur, float chromaGBlur, float lumaSharpen, float chromaSharpen, float chromaHShift, float chromaVShift, int verbose) |
| SwsVector * | sws_allocVec (int length) |
| Allocates and returns an uninitialized vector with length coefficients. | |
| SwsVector * | sws_getGaussianVec (double variance, double quality) |
| Returns a normalized Gaussian curve used to filter stuff quality=3 is high quality, lower is lower quality. | |
| SwsVector * | sws_getConstVec (double c, int length) |
| Allocates and returns a vector with length coefficients, all with the same value c. | |
| SwsVector * | sws_getIdentityVec (void) |
| Allocates and returns a vector with just one coefficient, with value 1.0. | |
| static double | sws_dcVec (SwsVector *a) |
| void | sws_scaleVec (SwsVector *a, double scalar) |
| Scales all the coefficients of a by the scalar value. | |
| void | sws_normalizeVec (SwsVector *a, double height) |
| Scales 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) |
| Allocates and returns 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) |
| Prints 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) |
| Frees 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) |
| Checks if context can be reused, otherwise reallocates 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_jpeg | ( | enum PixelFormat * | format | ) | [static] |
Definition at line 743 of file utils.c.
Referenced by sws_getCachedContext(), sws_getContext(), and sws_init_context().
| SwsContext* sws_alloc_context | ( | void | ) | [read] |
Allocates 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 758 of file utils.c.
Referenced by sws_getCachedContext(), and sws_getContext().
| SwsVector* sws_allocVec | ( | int | length | ) |
Allocates and returns an uninitialized vector with length coefficients.
Definition at line 1217 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 | ) |
Frees the swscaler context swsContext.
If swsContext is NULL, then does nothing.
Definition at line 1448 of file utils.c.
Referenced by config_props(), do_video_resample(), doTest(), freeBuffers(), main(), stream_close(), sws_getCachedContext(), sws_getContext(), transcode(), uninit(), and uninit_opts().
| void sws_freeVec | ( | SwsVector * | a | ) |
Definition at line 1429 of file utils.c.
Referenced by 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] |
Checks if context can be reused, otherwise reallocates 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 1507 of file utils.c.
Referenced by queue_picture().
| 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 | |||
| ) |
Allocates and returns a vector with length coefficients, all with the same value c.
Definition at line 1249 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] |
Allocates and returns a 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 1123 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 | |||
| ) |
Returns a normalized Gaussian curve used to filter stuff quality=3 is high quality, lower is lower quality.
Definition at line 1229 of file utils.c.
Referenced by allocStuff(), and sws_getDefaultFilter().
| SwsVector* sws_getIdentityVec | ( | void | ) |
Allocates and returns a vector with just one coefficient, with value 1.0.
Definition at line 1263 of file utils.c.
Referenced by sws_getDefaultFilter().
| int sws_init_context | ( | struct SwsContext * | sws_context, | |
| SwsFilter * | srcFilter, | |||
| SwsFilter * | dstFilter | |||
| ) |
Initializes the swscaler context sws_context.
Definition at line 768 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 | |||
| ) |
Scales all the coefficients of a so that their sum equals height.
Definition at line 1287 of file utils.c.
Referenced by sws_getDefaultFilter(), and sws_getGaussianVec().
Prints with av_log() a textual representation of the vector a if log_level <= av_log_level.
Definition at line 1406 of file utils.c.
Referenced by sws_getDefaultFilter().
| void sws_scaleVec | ( | SwsVector * | a, | |
| double | scalar | |||
| ) |
Scales all the coefficients of a by the scalar value.
Definition at line 1279 of file utils.c.
Referenced by allocStuff(), 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 | |||
| ) |
| inv_table | the yuv2rgb coefficients, normally ff_yuv2rgb_coeffs[x] |
Definition at line 701 of file utils.c.
Referenced by sws_getCachedContext(), and sws_getContext().
| void sws_shiftVec | ( | SwsVector * | a, | |
| int | shift | |||
| ) |
| 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 44 of file yuv2rgb.c.
Referenced by sws_getCachedContext(), sws_getCoefficients(), and sws_getContext().
const FormatEntry format_entries[PIX_FMT_NB] [static] |
1.5.8