Image Scaling Interface

Detailed Description

Interface for image scaling.

Summary

The Image Scaling interface provides a general API for configuring and controlling image scaling.

Data Structures
struct	isu_status_t
struct	isu_callback_args_t
struct	isu_buffer_cfg_t
struct	isu_cfg_t
struct	isu_runtime_cfg_t
struct	isu_api_t
struct	isu_instance_t

Typedefs
typedef void	isu_ctrl_t

Enumerations
enum	isu_state_t
enum	isu_color_format_t
enum	isu_data_swap_t

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Data Structure Documentation

isu_status_t

struct isu_status_t

Image Scaling status

Data Fields
isu_state_t	state	status of scaling module

isu_callback_args_t

struct isu_callback_args_t

Scaling callback function parameter data

Data Fields
void const *	p_context	Placeholder for user data.

isu_buffer_cfg_t

struct isu_buffer_cfg_t

Image Scaling configuration

Data Fields
uint32_t	hsize	Horizontal size.
uint32_t	vsize	Vertical size.
uint32_t	hstride	memory stride
isu_color_format_t	format	color format
isu_data_swap_t	data_swap	data swap setting
uint32_t *	p_base	base address for plane0
uint32_t *	p_base_cbcr	base address for plane1(for Cb and Cr component)

isu_cfg_t

struct isu_cfg_t

ISU configuration parameters

Data Fields
isu_buffer_cfg_t	input
	input configuration
isu_buffer_cfg_t	output
	output configuration
void(*	p_callback )(isu_callback_args_t *p_args)
	Callback provided when a image conversion ISR occurs.
void const *	p_extend
	Placeholder for user data.

isu_runtime_cfg_t

struct isu_runtime_cfg_t

ISU runtime configuration parameters

Data Fields
isu_buffer_cfg_t	input	input configuration
isu_buffer_cfg_t	output	output configuration

isu_api_t

struct isu_api_t

Shared Interface definition for image scaling peripheral

Data Fields
fsp_err_t(*	open )(isu_ctrl_t *const p_ctrl, isu_cfg_t const *const p_cfg)
fsp_err_t(*	close )(isu_ctrl_t *const p_ctrl)
fsp_err_t(*	start )(isu_ctrl_t *const p_ctrl)
fsp_err_t(*	changeCfg )(isu_ctrl_t *const p_ctrl, isu_runtime_cfg_t *const p_runtime_cfg)

Field Documentation

open

fsp_err_t(* isu_api_t::open) (isu_ctrl_t *const p_ctrl, isu_cfg_t const *const p_cfg)

Open scaling device.

Parameters

[in,out]	p_ctrl	Pointer to scaling interface control block.
[in]	p_cfg	Pointer to scaling configuration structure.

close

fsp_err_t(* isu_api_t::close) (isu_ctrl_t *const p_ctrl)

Close scaling device.

Parameters

[in]

p_ctrl

Pointer to scaling interface control block.

start

fsp_err_t(* isu_api_t::start) (isu_ctrl_t *const p_ctrl)

Start image scaling.

Parameters

[in]

p_ctrl

Pointer to scaling interface control block.

changeCfg

fsp_err_t(* isu_api_t::changeCfg) (isu_ctrl_t *const p_ctrl, isu_runtime_cfg_t *const p_runtime_cfg)

Change image scaling configuration.

Parameters

[in]

p_ctrl

Pointer to scaling interface control block.

isu_instance_t

struct isu_instance_t

This structure encompasses everything that is needed to use an instance of this interface.

Data Fields
isu_ctrl_t *	p_ctrl	Pointer to the control structure for this instance.
isu_cfg_t const *	p_cfg	Pointer to the configuration structure for this instance.
isu_api_t const *	p_api	Pointer to the API structure for this instance.

Typedef Documentation

isu_ctrl_t

typedef void isu_ctrl_t

Image Scaling control block

Enumeration Type Documentation

isu_state_t

enum isu_state_t

Image Scaling module state

Enumerator
ISU_STATE_IDLE	Image Scaling is idle.
ISU_IN_PROGRESS	Image Scaling in progress.
ISU_STATE_BUSY	Image Scaling reset in progress.

isu_color_format_t

enum isu_color_format_t

Color format setting

Enumerator
ISU_COLOR_FORMAT_RGB565	RGB565.
ISU_COLOR_FORMAT_RGB888	RGB888.
ISU_COLOR_FORMAT_BGR888	BGR888.
ISU_COLOR_FORMAT_ARGB8888	ARGB8888.
ISU_COLOR_FORMAT_RGBA8888	RGBA8888.
ISU_COLOR_FORMAT_ABGR8888	ABGR888.
ISU_COLOR_FORMAT_YCBCR422_UYVY	YCbCr422 UYVY.
ISU_COLOR_FORMAT_YCBCR422_YUY2	YCbCr422 YUY2.
ISU_COLOR_FORMAT_YCBCR422_NV16	YCbCr422 NV16.
ISU_COLOR_FORMAT_YCBCR420_NV12	YCbCR420 NV12.
ISU_COLOR_FORMAT_RAW8	RAW8.
ISU_COLOR_FORMAT_RAW10	RAW10.
ISU_COLOR_FORMAT_RAW12	RAW12.

isu_data_swap_t

enum isu_data_swap_t

Data swap setting

Enumerator
ISU_DATA_SWAP_8BIT	8 bit data swap setting
ISU_DATA_SWAP_16BIT	16bit data swap setting
ISU_DATA_SWAP_32BIT	32bit data swap setting