swscale.h File Reference

---

Detailed Description

external api for the swscale stuff

Definition in file swscale.h.

Go to the source code of this file.

Classes
struct	SwsVector
struct	SwsFilter
Functions
void	sws_freeContext (struct SwsContext *swsContext)
struct SwsContext *	sws_getContext (int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)
int	sws_scale (struct SwsContext *context, uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
	swscale warper, so we don't need to export the SwsContext.
int	sws_scale_ordered (struct SwsContext *context, uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[]) attribute_deprecated
	swscale warper, so we don't need to export the SwsContext
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_getGaussianVec (double variance, double quality)
	returns a normalized gaussian curve used to filter stuff quality=3 is high quality, lowwer is lowwer quality
SwsVector *	sws_getConstVec (double c, int length)
SwsVector *	sws_getIdentityVec (void)
void	sws_scaleVec (SwsVector *a, double scalar)
void	sws_normalizeVec (SwsVector *a, double 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)
void	sws_printVec (SwsVector *a)
void	sws_freeVec (SwsVector *a)
SwsFilter *	sws_getDefaultFilter (float lumaGBlur, float chromaGBlur, float lumaSarpen, float chromaSharpen, float chromaHShift, float chromaVShift, int verbose)
void	sws_freeFilter (SwsFilter *filter)
struct SwsContext *	sws_getCachedContext (struct SwsContext *context, int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)
	Checks if context is valid or reallocs a new one instead.

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Function Documentation

void sws_freeContext

(

struct SwsContext *

swsContext

)

Definition at line 549 of file imgresample.c.

Referenced by doTest(), and sws_getCachedContext().

struct SwsContext* sws_getContext	(	int	srcW,
		int	srcH,
		int	srcFormat,
		int	dstW,
		int	dstH,
		int	dstFormat,
		int	flags,
		SwsFilter *	srcFilter,
		SwsFilter *	dstFilter,
		double *	param
	)			[read]

Definition at line 515 of file imgresample.c.

Referenced by doTest(), main(), and sws_getCachedContext().

int sws_scale	(	SwsContext *	c,
		uint8_t *	src[],
		int	srcStride[],
		int	srcSliceY,
		int	srcSliceH,
		uint8_t *	dst[],
		int	dstStride[]
	)

swscale warper, so we don't need to export the SwsContext.

assumes planar YUV to be in YUV order instead of YVU

Definition at line 599 of file imgresample.c.

Referenced by doTest(), main(), and sws_scale_ordered().

int sws_scale_ordered	(	struct SwsContext *	context,
		uint8_t *	src[],
		int	srcStride[],
		int	srcSliceY,
		int	srcSliceH,
		uint8_t *	dst[],
		int	dstStride[]
	)

swscale warper, so we don't need to export the SwsContext

Definition at line 2580 of file swscale.c.

int sws_setColorspaceDetails	(	SwsContext *	c,
		const int	inv_table[4],
		int	srcRange,
		const int	table[4],
		int	dstRange,
		int	brightness,
		int	contrast,
		int	saturation
	)

Parameters:

	inv_table	the yuv2rgb coeffs, normally Inverse_Table_6_9[x]
	fullRange	if 1 then the luma range is 0..255 if 0 it is 16..235

Returns:

-1 if not supported

Definition at line 1931 of file swscale.c.

Referenced by sws_getContext().

int sws_getColorspaceDetails	(	SwsContext *	c,
		int **	inv_table,
		int *	srcRange,
		int **	table,
		int *	dstRange,
		int *	brightness,
		int *	contrast,
		int *	saturation
	)

Returns:

-1 if not supported

Definition at line 1990 of file swscale.c.

SwsVector* sws_getGaussianVec	(	double	variance,
		double	quality
	)

returns a normalized gaussian curve used to filter stuff quality=3 is high quality, lowwer is lowwer quality

Definition at line 2647 of file swscale.c.

Referenced by sws_getDefaultFilter().

SwsVector* sws_getConstVec	(	double	c,
		int	length
	)

Definition at line 2668 of file swscale.c.

Referenced by sws_getIdentityVec().

SwsVector* sws_getIdentityVec

(

void

)

Definition at line 2683 of file swscale.c.

Referenced by sws_getDefaultFilter().

void sws_scaleVec	(	SwsVector *	a,
		double	scalar
	)

Definition at line 2697 of file swscale.c.

Referenced by sws_getDefaultFilter(), and sws_normalizeVec().

void sws_normalizeVec	(	SwsVector *	a,
		double	height
	)

Definition at line 2704 of file swscale.c.

Referenced by sws_getDefaultFilter(), and sws_getGaussianVec().

void sws_convVec	(	SwsVector *	a,
		SwsVector *	b
	)

Definition at line 2808 of file swscale.c.

void sws_addVec	(	SwsVector *	a,
		SwsVector *	b
	)

Definition at line 2792 of file swscale.c.

Referenced by sws_getDefaultFilter().

void sws_subVec	(	SwsVector *	a,
		SwsVector *	b
	)

Definition at line 2800 of file swscale.c.

void sws_shiftVec	(	SwsVector *	a,
		int	shift
	)

Definition at line 2784 of file swscale.c.

Referenced by sws_getDefaultFilter().

SwsVector* sws_cloneVec

(

SwsVector *

a

)

Definition at line 2816 of file swscale.c.

void sws_printVec

(

SwsVector *

a

)

Definition at line 2829 of file swscale.c.

Referenced by sws_getDefaultFilter().

void sws_freeVec

(

SwsVector *

a

)

Definition at line 2852 of file swscale.c.

Referenced by initFilter(), sws_freeFilter(), and sws_getDefaultFilter().

SwsFilter* sws_getDefaultFilter	(	float	lumaGBlur,
		float	chromaGBlur,
		float	lumaSarpen,
		float	chromaSharpen,
		float	chromaHShift,
		float	chromaVShift,
		int	verbose
	)

Definition at line 2585 of file swscale.c.

void sws_freeFilter

(

SwsFilter *

filter

)

Definition at line 2860 of file swscale.c.

struct SwsContext* sws_getCachedContext	(	struct SwsContext *	context,
		int	srcW,
		int	srcH,
		int	srcFormat,
		int	dstW,
		int	dstH,
		int	dstFormat,
		int	flags,
		SwsFilter *	srcFilter,
		SwsFilter *	dstFilter,
		double *	param
	)			[read]

Checks if context is valid or reallocs a new one instead.

If context is NULL, just calls sws_getContext() to get a new one. Otherwise, checks if the parameters are the same already saved in context. If that is the case, returns the current context. Otherwise, frees context and gets a new one.

Be warned that srcFilter, dstFilter are not checked, they are asumed to remain valid.

Definition at line 574 of file imgresample.c.