LDC Node Module

Introduction

This section contains module APIs for the TIOVX LDC node tivxVpacLdcNode.

Data Structures
struct	LDCObj
	LDC Module Data Structure. More...

Functions
vx_status	app_init_ldc (vx_context context, LDCObj *ldcObj, SensorObj *sensorObj, char *objName, uint32_t num_cameras_enabled)
	LDC module init helper function. More...
void	app_deinit_ldc (LDCObj *ldcObj)
	LDC module deinit helper function. More...
void	app_delete_ldc (LDCObj *ldcObj)
	LDC module delete helper function. More...
vx_status	app_create_graph_ldc (vx_graph graph, LDCObj *ldcObj, vx_object_array input_arr, const char *target)
	LDC module create helper function. More...
vx_status	app_create_graph_ldc_write_output (vx_graph graph, LDCObj *ldcObj)
	LDC module write output helper function. More...
vx_status	app_send_cmd_ldc_write_node (LDCObj *ldcObj, vx_uint32 start_frame, vx_uint32 num_frames, vx_uint32 num_skip)
	LDC module write output helper function. More...

Macros
#define	LDC_TABLE_WIDTH   (1920)
	Default LDC table width. Can be modified as needed for use case. More...
#define	LDC_TABLE_HEIGHT   (1080)
	Default LDC table width. Can be modified as needed for use case. More...
#define	LDC_DS_FACTOR   (2)
	Default LDC downscale factor. Can be modified as needed for use case. More...
#define	LDC_BLOCK_WIDTH   (64)
	Default LDC block width. Can be modified as needed for use case. More...
#define	LDC_BLOCK_HEIGHT   (32)
	Default LDC block height. Can be modified as needed for use case. More...
#define	LDC_PIXEL_PAD   (1)
	Default LDC pixel padding. Can be modified as needed for use case. More...

Macro Definition Documentation

LDC_TABLE_WIDTH

#define LDC_TABLE_WIDTH   (1920)

Default LDC table width. Can be modified as needed for use case.

LDC_TABLE_HEIGHT

#define LDC_TABLE_HEIGHT   (1080)

Default LDC table width. Can be modified as needed for use case.

LDC_DS_FACTOR

#define LDC_DS_FACTOR   (2)

Default LDC downscale factor. Can be modified as needed for use case.

LDC_BLOCK_WIDTH

#define LDC_BLOCK_WIDTH   (64)

Default LDC block width. Can be modified as needed for use case.

LDC_BLOCK_HEIGHT

#define LDC_BLOCK_HEIGHT   (32)

Default LDC block height. Can be modified as needed for use case.

LDC_PIXEL_PAD

#define LDC_PIXEL_PAD   (1)

Default LDC pixel padding. Can be modified as needed for use case.

Function Documentation

app_init_ldc()

vx_status app_init_ldc	(	vx_context	context,
		LDCObj *	ldcObj,
		SensorObj *	sensorObj,
		char *	objName,
		uint32_t	num_cameras_enabled
	)

LDC module init helper function.

This LDC init helper function will create all the data objects required to create the LDC node

Parameters

[in]	context	OpenVX context which must be created using vxCreateContext
[out]	ldcObj	LDC Module object which gets populated with LDC node data objects
[in]	sensorObj	Sensor Module object used to initialize LDC data object parameters; must be initialized prior to passing to this function
[in]	objName	String of the name of this object
[in]	num_cameras_enabled	Number of cameras enabled

app_deinit_ldc()

void app_deinit_ldc

(

LDCObj *

ldcObj

)

LDC module deinit helper function.

This LDC deinit helper function will release all the data objects created during the app_init_ldc call

Parameters

[in,out]

ldcObj

LDC Module object which contains LDC node data objects which are released in this function

app_delete_ldc()

void app_delete_ldc

(

LDCObj *

ldcObj

)

LDC module delete helper function.

This LDC delete helper function will delete the LDC node and write node that is created during the app_create_graph_ldc call

Parameters

[in,out]

ldcObj

LDC Module object which contains LDC node objects which are released in this function

app_create_graph_ldc()

vx_status app_create_graph_ldc	(	vx_graph	graph,
		LDCObj *	ldcObj,
		vx_object_array	input_arr,
		const char *	target
	)

LDC module create helper function.

This LDC create helper function will create the node using all the data objects created during the app_init_ldc call. Internally calls app_create_graph_ldc_write_output if en_out_ldc_write is set

Parameters

[in]	graph	OpenVX graph that has been created using vxCreateGraph and where the LDC node is created
[in,out]	ldcObj	LDC Module object which contains LDC node and write node which are created in this function
[in]	input_arr	Input object array to LDC node. Must be created separately using vxCreateObjectArray
[in]	target	The name of the target (ASCII string) on which the node executes.

app_create_graph_ldc_write_output()

vx_status app_create_graph_ldc_write_output	(	vx_graph	graph,
		LDCObj *	ldcObj
	)

LDC module write output helper function.

This LDC create helper function will create the node for writing the LDC output

Parameters

[in]	graph	OpenVX graph
[in,out]	ldcObj	LDC Module object which contains LDC node and write node which are created in this function

app_send_cmd_ldc_write_node()

vx_status app_send_cmd_ldc_write_node	(	LDCObj *	ldcObj,
		vx_uint32	start_frame,
		vx_uint32	num_frames,
		vx_uint32	num_skip
	)

LDC module write output helper function.

This LDC create helper function will create the node for writing the LDC output

Parameters

[in]	ldcObj	LDC Module object which contains the write node used in this function
[in]	start_frame	Starting frame to write
[in]	num_frames	Total number of frames to write
[in]	num_skip	Number of capture frames to skip writing