Overview

Data Structures
struct	XV_Vscaler_l2
	V Scaler Layer 2 data. More...

Hw Configuration
The following constants define the scaler HW MAX configuration
enum	XV_VSCALER_TYPE
	This typedef eumerates the Scaler Type. More...
enum	XV_VSCALER_TAPS
	This typedef enumerates the supported taps. More...
int	XV_VScalerInitialize (XV_Vscaler_l2 *InstancePtr, u16 DeviceId)
	This function initializes the core instance. More...
void	XV_VScalerStart (XV_Vscaler_l2 *InstancePtr)
	This function starts the vertical scaler core. More...
void	XV_VScalerStop (XV_Vscaler_l2 *InstancePtr)
	This function stops the vertical scaler core. More...
void	XV_VScalerLoadExtCoeff (XV_Vscaler_l2 *InstancePtr, u16 num_phases, u16 num_taps, const short *Coeff)
	This function loads user defined filter coefficients in the scaler coefficient storage. More...
int	XV_VScalerSetup (XV_Vscaler_l2 *InstancePtr, u32 WidthIn, u32 HeightIn, u32 HeightOut, u32 ColorFormat)
	This function configures the scaler core registers with the specified configuration parameters of the axi stream. More...
void	XV_VScalerDbgReportStatus (XV_Vscaler_l2 *InstancePtr)
	This function prints V Scaler status on the console. More...
#define	XV_VSCALER_MAX_V_TAPS   (12)
#define	XV_VSCALER_MAX_V_PHASES   (64)
#define	XV_VscalerIs420Enabled(InstancePtr)   ((InstancePtr)->Vsc.Config.Is420Enabled)
	This macro checks if Vscaler instance is enabled for 4:2:0 processing. More...

Macro Definition Documentation

#define XV_VscalerIs420Enabled

(

InstancePtr

)

((InstancePtr)->Vsc.Config.Is420Enabled)

This macro checks if Vscaler instance is enabled for 4:2:0 processing.

Parameters

InstancePtr

is pointer to Vscaler core layer 2

Returns

Returns 1 if condition is TRUE or 0 if FALSE

Referenced by XV_VScalerDbgReportStatus(), and XV_VScalerSetup().

Enumeration Type Documentation

enum XV_VSCALER_TAPS

This typedef enumerates the supported taps.

enum XV_VSCALER_TYPE

This typedef eumerates the Scaler Type.

Function Documentation

void XV_VScalerDbgReportStatus

(

XV_Vscaler_l2 *

InstancePtr

)

This function prints V Scaler status on the console.

Parameters

InstancePtr

is the instance pointer to the core instance.

Returns

None

References XV_vscaler_Config::BaseAddress, XV_vscaler::Config, XV_vscaler_Config::NumTaps, XV_vscaler_Config::PhaseShift, XV_vscaler_Config::ScalerType, and XV_VscalerIs420Enabled.

int XV_VScalerInitialize	(	XV_Vscaler_l2 *	InstancePtr,
		u16	DeviceId
	)

This function initializes the core instance.

Parameters

InstancePtr	is a pointer to core instance to be worked upon
DeviceId	is instance id of the core

Returns

XST_SUCCESS if device is found and initialized XST_DEVICE_NOT_FOUND if device is not found

void XV_VScalerLoadExtCoeff	(	XV_Vscaler_l2 *	InstancePtr,
		u16	num_phases,
		u16	num_taps,
		const short *	Coeff
	)

This function loads user defined filter coefficients in the scaler coefficient storage.

Parameters

InstancePtr	is a pointer to the core instance to be worked on.
num_phases	is the number of phases in coefficient table
num_taps	is the number of taps in coefficient table
Coeff	is a pointer to user defined filter coefficients table

Returns

None

References XV_vscaler::Config, and XV_vscaler_Config::PhaseShift.

int XV_VScalerSetup	(	XV_Vscaler_l2 *	InstancePtr,
		u32	WidthIn,
		u32	HeightIn,
		u32	HeightOut,
		u32	ColorFormat
	)

This function configures the scaler core registers with the specified configuration parameters of the axi stream.

Parameters

InstancePtr	is a pointer to the core instance to be worked on.
WidthIn	is the input stream width
HeightIn	is the input stream height
HeightOut	is the output stream height
ColorFormat	is the color format of the stream

Returns

None

References XV_vscaler::Config, XV_vscaler_Config::PixPerClk, XV_vscaler_Config::ScalerType, and XV_VscalerIs420Enabled.

void XV_VScalerStart

(

XV_Vscaler_l2 *

InstancePtr

)

This function starts the vertical scaler core.

Parameters

InstancePtr

is a pointer to the core instance to be worked on.

Returns

None

void XV_VScalerStop

(

XV_Vscaler_l2 *

InstancePtr

)

This function stops the vertical scaler core.

Parameters

InstancePtr

is a pointer to the core instance to be worked on.

Returns

None