gva_tensor_meta.h File Reference

This file contains helper functions to control _GstGVATensorMeta instances. More...

Go to the source code of this file.

Classes
struct	_GstGVATensorMeta
	This struct represents raw tensor metadata and contains instance of parent GstMeta and fields describing inference result tensor. This metadata instances is attached to buffer by gvainference elements. More...

Typedefs
typedef struct _GstGVATensorMeta	GstGVATensorMeta

Enumerations
enum	GVAPrecision { GVA_PRECISION_UNSPECIFIED = 255, GVA_PRECISION_FP32 = 10, GVA_PRECISION_U8 = 40 }
	This enum describes model layer precision. More...
enum	GVALayout { GVA_LAYOUT_ANY = 0, GVA_LAYOUT_NCHW = 1, GVA_LAYOUT_NHWC = 2, GVA_LAYOUT_NC = 193 }
	This enum describes model layer layout. More...

Functions
const void *	gva_get_tensor_data (GstStructure *s, gsize *nbytes)
	This function returns a pointer to the fixed array of tensor bytes. More...
const GstMetaInfo *	gst_gva_tensor_meta_get_info (void)
	This function registers, if needed, and returns GstMetaInfo for _GstGVATensorMeta. More...
GType	gst_gva_tensor_meta_api_get_type (void)
	This function registers, if needed, and returns a GType for api "GstGVATensorMetaAPI" and associate it with GVA_TENSOR_META_TAG tag. More...
GstGVATensorMeta *	find_tensor_meta (GstBuffer *buffer, const char *model_name, const char *output_layer)
	This function searches for first _GstGVATensorMeta instance that satisfies passed parameters. More...
GstGVATensorMeta *	find_tensor_meta_ext (GstBuffer *buffer, const char *model_name, const char *output_layer, const char *element_id)
	This function searches for first _GstGVATensorMeta instance that satisfies passed parameters. More...

Detailed Description

This file contains helper functions to control _GstGVATensorMeta instances.

Enumeration Type Documentation

GVALayout

enum GVALayout

This enum describes model layer layout.

Enumerator
GVA_LAYOUT_ANY	unspecified layout
GVA_LAYOUT_NCHW	NCWH layout
GVA_LAYOUT_NHWC	NHWC layout
GVA_LAYOUT_NC	NC layout

GVAPrecision

enum GVAPrecision

This enum describes model layer precision.

Enumerator
GVA_PRECISION_UNSPECIFIED	default value
GVA_PRECISION_FP32	32bit floating point value
GVA_PRECISION_U8	unsignned 8bit integer value

Function Documentation

find_tensor_meta()

GstGVATensorMeta* find_tensor_meta	(	GstBuffer *	buffer,
		const char *	model_name,
		const char *	output_layer
	)

This function searches for first _GstGVATensorMeta instance that satisfies passed parameters.

Parameters

buffer	GstBuffer* that is searched for metadata
model_name	substring that should be in _GstGVATensorMeta instance's model_name
output_layer	substring that should be in _GstGVATensorMeta instance's layer_name

Returns

GstGVATensorMeta* for found instance or NULL if none are found

find_tensor_meta_ext()

GstGVATensorMeta* find_tensor_meta_ext	(	GstBuffer *	buffer,
		const char *	model_name,
		const char *	output_layer,
		const char *	element_id
	)

This function searches for first _GstGVATensorMeta instance that satisfies passed parameters.

Parameters

buffer	GstBuffer* that is searched for metadata
model_name	substring that should be in _GstGVATensorMeta instance's model_name
output_layer	substring that should be in _GstGVATensorMeta instance's layer_name
element_id	element_id substring that should be in _GstGVATensorMeta instance's element_id

Returns

GstGVATensorMeta* for found instance or NULL if none are found

gst_gva_tensor_meta_api_get_type()

GType gst_gva_tensor_meta_api_get_type

(

void

)

This function registers, if needed, and returns a GType for api "GstGVATensorMetaAPI" and associate it with GVA_TENSOR_META_TAG tag.

Returns

GType type

gst_gva_tensor_meta_get_info()

const GstMetaInfo* gst_gva_tensor_meta_get_info

(

void

)

This function registers, if needed, and returns GstMetaInfo for _GstGVATensorMeta.

Returns

GstMetaInfo* for registered type

gva_get_tensor_data()

const void* gva_get_tensor_data ( GstStructure *  s, gsize *  nbytes  )

inline

This function returns a pointer to the fixed array of tensor bytes.

Parameters

	s	GstStructure* to get tensor from. It's assumed that tensor data is stored in "data_buffer" field
[out]	nbytes	pointer to the location to store the number of bytes in returned array

Returns

void* to tensor data as bytes, NULL if s has no "data_buffer" field