FFmpeg
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Return the LIBSWSCALE_VERSION_INT constant. More...
Files | |
file | swscale.h |
external API header | |
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_CPU_CAPS_MMX 0x80000000 |
CPU caps are autodetected now, those flags are only provided for API compatibility. | |
#define | SWS_CPU_CAPS_MMXEXT 0x20000000 |
#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) |
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. | |
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_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 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. | |
Return the LIBSWSCALE_VERSION_INT constant.
#define SWS_FAST_BILINEAR 1 |
Definition at line 56 of file swscale.h.
Referenced by ff_get_unscaled_swscale(), initFilter(), selfTest(), sws_init_context(), sws_init_swscale(), and sws_init_swscale_TMPL().
#define SWS_BILINEAR 2 |
Definition at line 57 of file swscale.h.
Referenced by configure_input_video_filter(), doTest(), initFilter(), main(), selfTest(), and sws_init_context().
#define SWS_BICUBIC 4 |
Definition at line 58 of file swscale.h.
Referenced by filter_frame(), init(), init_opts(), initFilter(), selfTest(), and sws_init_context().
#define SWS_X 8 |
Definition at line 59 of file swscale.h.
Referenced by initFilter(), selfTest(), and sws_init_context().
#define SWS_POINT 0x10 |
Definition at line 60 of file swscale.h.
Referenced by ff_get_unscaled_swscale(), init(), initFilter(), selfTest(), and sws_init_context().
#define SWS_AREA 0x20 |
Definition at line 61 of file swscale.h.
Referenced by initFilter(), selfTest(), and sws_init_context().
#define SWS_BICUBLIN 0x40 |
Definition at line 62 of file swscale.h.
Referenced by sws_init_context().
#define SWS_GAUSS 0x80 |
Definition at line 63 of file swscale.h.
Referenced by initFilter(), and sws_init_context().
#define SWS_SINC 0x100 |
Definition at line 64 of file swscale.h.
Referenced by initFilter(), and sws_init_context().
#define SWS_LANCZOS 0x200 |
Definition at line 65 of file swscale.h.
Referenced by initFilter(), and sws_init_context().
#define SWS_SPLINE 0x400 |
Definition at line 66 of file swscale.h.
Referenced by initFilter(), and sws_init_context().
#define SWS_SRC_V_CHR_DROP_MASK 0x30000 |
Definition at line 68 of file swscale.h.
Referenced by sws_init_context().
#define SWS_SRC_V_CHR_DROP_SHIFT 16 |
Definition at line 69 of file swscale.h.
Referenced by sws_init_context().
#define SWS_PARAM_DEFAULT 123456 |
Definition at line 71 of file swscale.h.
Referenced by initFilter(), and sws_getCachedContext().
#define SWS_PRINT_INFO 0x1000 |
Definition at line 73 of file swscale.h.
Referenced by initFilter(), sws_init_context(), and swscale().
#define SWS_FULL_CHR_H_INT 0x2000 |
Definition at line 77 of file swscale.h.
Referenced by ff_sws_init_output_funcs(), ff_sws_init_swscale_ppc(), sws_init_context(), and sws_init_swscale_TMPL().
#define SWS_FULL_CHR_H_INP 0x4000 |
Definition at line 79 of file swscale.h.
Referenced by sws_init_context().
#define SWS_ACCURATE_RND 0x40000 |
Definition at line 81 of file swscale.h.
Referenced by ff_get_unscaled_swscale(), get_unscaled_swscale_neon(), initFilter(), and sws_init_swscale_TMPL().
#define SWS_BITEXACT 0x80000 |
Definition at line 82 of file swscale.h.
Referenced by configure_input_video_filter(), ff_get_unscaled_swscale(), ff_get_unscaled_swscale_ppc(), ff_sws_init_swscale_ppc(), initFilter(), sws_init_swscale_TMPL(), and sws_scale().
#define SWS_ERROR_DIFFUSION 0x800000 |
Definition at line 83 of file swscale.h.
Referenced by sws_init_context().
#define SWS_CPU_CAPS_MMX 0x80000000 |
#define SWS_MAX_REDUCE_CUTOFF 0.002 |
Definition at line 101 of file swscale.h.
Referenced by initFilter().
#define SWS_CS_DEFAULT 5 |
Definition at line 109 of file swscale.h.
Referenced by sws_getCoefficients().
const char* swscale_configuration | ( | void | ) |
const char* swscale_license | ( | void | ) |
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. |
Definition at line 49 of file yuv2rgb.c.
Referenced by parse_yuv_type().
int sws_isSupportedInput | ( | enum AVPixelFormat | pix_fmt | ) |
int sws_isSupportedOutput | ( | enum AVPixelFormat | pix_fmt | ) |
int sws_isSupportedEndiannessConversion | ( | enum AVPixelFormat | pix_fmt | ) |
[in] | pix_fmt | the pixel format |
Definition at line 237 of file utils.c.
Referenced by query_formats(), and sws_init_context().
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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 1108 of file utils.c.
Referenced by config_props(), filter_frame(), sws_getCachedContext(), and sws_getContext().
int sws_init_context | ( | struct SwsContext * | sws_context, |
SwsFilter * | srcFilter, | ||
SwsFilter * | dstFilter | ||
) |
Initialize the swscaler context sws_context.
Definition at line 1122 of file utils.c.
Referenced by config_props(), filter_frame(), sws_getCachedContext(), and sws_getContext().
void sws_freeContext | ( | struct SwsContext * | swsContext | ) |
Free the swscaler context swsContext.
If swsContext is NULL, then does nothing.
Definition at line 2008 of file utils.c.
Referenced by close_filter_param(), close_stream(), config_props(), doTest(), ff_scale_image(), filter_frame(), main(), stream_close(), sws_getCachedContext(), sws_getContext(), uninit(), uninit_opts(), and uninit_parse_context().
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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 1663 of file utils.c.
Referenced by doTest(), ff_scale_image(), init_opts(), main(), and open_filter_param().
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 921 of file swscale.c.
Referenced by blur(), doTest(), ff_scale_image(), filter_frame(), main(), queue_picture(), scale_slice(), and wrap().
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 980 of file utils.c.
Referenced by filter_frame(), and sws_init_context().
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.
Definition at line 1757 of file utils.c.
Referenced by sws_cloneVec(), sws_getConstVec(), and sws_getGaussianVec().
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 1774 of file utils.c.
Referenced by alloc_sws_context(), open_filter_param(), and sws_getDefaultFilter().
SwsVector* sws_getConstVec | ( | double | c, |
int | length | ||
) |
Allocate and return a vector with length coefficients, all with the same value c.
Definition at line 1800 of file utils.c.
Referenced by sws_diffVec(), sws_getConvVec(), sws_getIdentityVec(), sws_getShiftedVec(), and sws_sumVec().
Allocate and return a vector with just one coefficient, with value 1.0.
Definition at line 1814 of file utils.c.
Referenced by sws_getDefaultFilter().
Scale all the coefficients of a by the scalar value.
Definition at line 1830 of file utils.c.
Referenced by alloc_sws_context(), sws_getDefaultFilter(), and sws_normalizeVec().
Scale all the coefficients of a so that their sum equals height.
Definition at line 1838 of file utils.c.
Referenced by sws_getDefaultFilter(), and sws_getGaussianVec().
Definition at line 1922 of file utils.c.
Referenced by sws_getDefaultFilter().
Definition at line 1913 of file utils.c.
Referenced by sws_getDefaultFilter().
Print with av_log() a textual representation of the vector a if log_level <= av_log_level.
Definition at line 1961 of file utils.c.
Referenced by sws_getDefaultFilter().
Definition at line 1987 of file utils.c.
Referenced by alloc_sws_context(), open_filter_param(), sws_freeFilter(), and sws_getDefaultFilter().
SwsFilter* sws_getDefaultFilter | ( | float | lumaGBlur, |
float | chromaGBlur, | ||
float | lumaSharpen, | ||
float | chromaSharpen, | ||
float | chromaHShift, | ||
float | chromaVShift, | ||
int | verbose | ||
) |
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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 2075 of file utils.c.
Referenced by alloc_sws_context(), and queue_picture().
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 1759 of file swscale_unscaled.c.
Referenced by palToRgbWrapper().
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 1769 of file swscale_unscaled.c.
Referenced by palToRgbWrapper().
Get the AVClass for swsContext.
It can be used in combination with AV_OPT_SEARCH_FAKE_OBJ for examining options.
Definition at line 90 of file options.c.
Referenced by child_class_next(), init_dict(), opt_default(), and show_help_default().