NVIDIA DeepStream SDK API Reference

6.1 Release

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Metadata Structures

Detailed Description

Define structures that hold metadata.

Data Structures

struct  _NvDsComp_BboxInfo
 Holds unclipped positional bounding box coordinates of the object processed by the component. More...
 
struct  _NvDsMetaPool
 Holds information about a given metadata pool. More...
 
struct  _NvDsBaseMeta
 Holds information about base metadata of a given metadata type. More...
 
struct  _NvDsBatchMeta
 Holds information about a formed batch containing frames from different sources. More...
 
struct  _NvDsFrameMeta
 Holds metadata for a frame in a batch. More...
 
struct  _NvDsObjectMeta
 Holds metadata for an object in the frame. More...
 
struct  _NvDsClassifierMeta
 Holds classifier metadata for an object. More...
 
struct  _NvDsLabelInfo
 Holds label metadata for the classifier. More...
 
struct  NvDsDisplayMeta
 Holds display metadata that the user can specify in the frame. More...
 
struct  _NvDsUserMeta
 Holds user metadata. More...
 
struct  _NvDsAudioFrameMeta
 Holds metadata for a audio frame in a batch. More...
 

Macros

#define MAX_USER_FIELDS   4
 Defines the number of additional fields available to the user in the metadata structure. More...
 
#define MAX_RESERVED_FIELDS   4
 
#define MAX_LABEL_SIZE   128
 Defines the maximum size of an array for storing a text result. More...
 
#define MAX_ELEMENTS_IN_DISPLAY_META   16
 Defines the maximum number of elements that a given display meta can hold. More...
 
#define UNTRACKED_OBJECT_ID   0xFFFFFFFFFFFFFFFF
 Defines an untracked object ID. More...
 

Typedefs

typedef GList NvDsFrameMetaList
 
typedef GList NvDsUserMetaList
 
typedef GList NvDsObjectMetaList
 
typedef GList NvDisplayMetaList
 
typedef GList NvDsClassifierMetaList
 
typedef GList NvDsLabelInfoList
 
typedef GList NvDsMetaList
 
typedef void NvDsElementMeta
 
typedef gpointer(* NvDsMetaCopyFunc )(gpointer data, gpointer user_data)
 Defines the type of a callback to copy metadata. More...
 
typedef void(* NvDsMetaReleaseFunc )(gpointer data, gpointer user_data)
 Defines the type of a callback to free metadata. More...
 
typedef struct _NvDsComp_BboxInfo NvDsComp_BboxInfo
 Holds unclipped positional bounding box coordinates of the object processed by the component. More...
 
typedef struct _NvDsMetaPool NvDsMetaPool
 Holds information about a given metadata pool. More...
 
typedef struct _NvDsBaseMeta NvDsBaseMeta
 Holds information about base metadata of a given metadata type. More...
 
typedef struct _NvDsBatchMeta NvDsBatchMeta
 Holds information about a formed batch containing frames from different sources. More...
 
typedef struct _NvDsFrameMeta NvDsFrameMeta
 Holds metadata for a frame in a batch. More...
 
typedef struct _NvDsObjectMeta NvDsObjectMeta
 Holds metadata for an object in the frame. More...
 
typedef struct _NvDsClassifierMeta NvDsClassifierMeta
 Holds classifier metadata for an object. More...
 
typedef struct _NvDsLabelInfo NvDsLabelInfo
 Holds label metadata for the classifier. More...
 
typedef struct NvDsDisplayMeta NvDsDisplayMeta
 Holds display metadata that the user can specify in the frame. More...
 
typedef struct _NvDsUserMeta NvDsUserMeta
 Holds user metadata. More...
 
typedef struct _NvDsAudioFrameMeta NvDsAudioFrameMeta
 Holds metadata for a audio frame in a batch. More...
 

Enumerations

enum  NvDsMetaType {
  NVDS_INVALID_META =-1,
  NVDS_BATCH_META = 1,
  NVDS_FRAME_META,
  NVDS_OBJ_META,
  NVDS_DISPLAY_META,
  NVDS_CLASSIFIER_META,
  NVDS_LABEL_INFO_META,
  NVDS_USER_META,
  NVDS_PAYLOAD_META,
  NVDS_EVENT_MSG_META,
  NVDS_OPTICAL_FLOW_META,
  NVDS_LATENCY_MEASUREMENT_META,
  NVDSINFER_TENSOR_OUTPUT_META,
  NVDSINFER_SEGMENTATION_META,
  NVDS_CROP_IMAGE_META,
  NVDS_TRACKER_PAST_FRAME_META,
  NVDS_AUDIO_BATCH_META,
  NVDS_AUDIO_FRAME_META,
  NVDS_PREPROCESS_FRAME_META,
  NVDS_PREPROCESS_BATCH_META,
  NVDS_CUSTOM_MSG_BLOB,
  NVDS_RESERVED_META = 4095,
  NVDS_GST_CUSTOM_META = 4096,
  NVDS_START_USER_META = NVDS_GST_CUSTOM_META + 4096 + 1,
  NVDS_FORCE32_META = 0x7FFFFFFF
}
 Specifies the type of metadata. More...
 

Functions

void nvds_acquire_meta_lock (NvDsBatchMeta *batch_meta)
 Acquires a lock before updating metadata. More...
 
void nvds_release_meta_lock (NvDsBatchMeta *batch_meta)
 Releases the lock after updating metadata. More...
 
NvDsBatchMetanvds_create_batch_meta (guint max_batch_size)
 Creates a batch metadata structure for a batch of specified size. More...
 
gboolean nvds_destroy_batch_meta (NvDsBatchMeta *batch_meta)
 Destroys a batch metadata structure. More...
 
NvDsFrameMetanvds_acquire_frame_meta_from_pool (NvDsBatchMeta *batch_meta)
 Acquires a frame meta from a batch's frame meta pool. More...
 
void nvds_add_frame_meta_to_batch (NvDsBatchMeta *batch_meta, NvDsFrameMeta *frame_meta)
 Adds a frame meta to a batch meta. More...
 
void nvds_remove_frame_meta_from_batch (NvDsBatchMeta *batch_meta, NvDsFrameMeta *frame_meta)
 Removes a frame meta from a batch meta. More...
 
NvDsObjectMetanvds_acquire_obj_meta_from_pool (NvDsBatchMeta *batch_meta)
 Acquires an object meta from a batch meta's object meta pool. More...
 
void nvds_add_obj_meta_to_frame (NvDsFrameMeta *frame_meta, NvDsObjectMeta *obj_meta, NvDsObjectMeta *obj_parent)
 Adds an object meta to a frame meta. More...
 
void nvds_remove_obj_meta_from_frame (NvDsFrameMeta *frame_meta, NvDsObjectMeta *obj_meta)
 Removes an object meta from the frame meta to which it is attached. More...
 
NvDsClassifierMetanvds_acquire_classifier_meta_from_pool (NvDsBatchMeta *batch_meta)
 Acquires a classifier meta from a batch meta's classifier meta pool. More...
 
void nvds_add_classifier_meta_to_roi (NvDsRoiMeta *roi_meta, NvDsClassifierMeta *classifier_meta)
 Adds a classifier meta to the appropriate roi meta. More...
 
void nvds_remove_classifier_meta_from_roi (NvDsRoiMeta *roi_meta, NvDsClassifierMeta *classifier_meta)
 Removes a classifier meta from the roi meta to which it is attached. More...
 
void nvds_add_classifier_meta_to_object (NvDsObjectMeta *obj_meta, NvDsClassifierMeta *classifier_meta)
 Adds a classifier meta to the appropriate object meta. More...
 
void nvds_remove_classifier_meta_from_obj (NvDsObjectMeta *obj_meta, NvDsClassifierMeta *classifier_meta)
 Removes a classifier meta from the object meta to which it is attached. More...
 
NvDsDisplayMetanvds_acquire_display_meta_from_pool (NvDsBatchMeta *batch_meta)
 Acquires a display meta from a batch meta's display meta pool. More...
 
void nvds_add_display_meta_to_frame (NvDsFrameMeta *frame_meta, NvDsDisplayMeta *display_meta)
 Adds a display meta to the appropriate frame meta. More...
 
void nvds_remove_display_meta_from_frame (NvDsFrameMeta *frame_meta, NvDsDisplayMeta *display_meta)
 Removes a display meta from the frame meta to which it is attached. More...
 
NvDsLabelInfonvds_acquire_label_info_meta_from_pool (NvDsBatchMeta *batch_meta)
 Acquires a label info meta from a batch meta's label info meta pool. More...
 
void nvds_add_label_info_meta_to_classifier (NvDsClassifierMeta *classifier_meta, NvDsLabelInfo *label_info_meta)
 Adds a label info meta to a classifier meta. More...
 
void nvds_remove_label_info_meta_from_classifier (NvDsClassifierMeta *classifier_meta, NvDsLabelInfo *label_info_meta)
 Removes a label info meta from the classifier meta to which it is attached. More...
 
void nvds_add_user_meta_to_batch (NvDsBatchMeta *batch_meta, NvDsUserMeta *user_meta)
 Add a user meta to a batch meta. More...
 
void nvds_add_user_meta_to_frame (NvDsFrameMeta *frame_meta, NvDsUserMeta *user_meta)
 Add a user meta to a frame meta. More...
 
void nvds_add_user_meta_to_roi (NvDsRoiMeta *roi_meta, NvDsUserMeta *user_meta)
 Add a user meta user to an roi meta. More...
 
void nvds_add_user_meta_to_obj (NvDsObjectMeta *obj_meta, NvDsUserMeta *user_meta)
 Add a user meta user to an object meta. More...
 
NvDsUserMetanvds_acquire_user_meta_from_pool (NvDsBatchMeta *batch_meta)
 Acquires a user meta from a batch meta's user meta pool. More...
 
void nvds_remove_user_meta_from_batch (NvDsBatchMeta *batch_meta, NvDsUserMeta *user_meta)
 Removes a user meta from a batch meta to which it is attached. More...
 
void nvds_remove_user_meta_from_frame (NvDsFrameMeta *frame_meta, NvDsUserMeta *user_meta)
 Removes a user meta from a frame meta to which it is attached. More...
 
void nvds_remove_user_meta_from_roi (NvDsRoiMeta *obj_meta, NvDsUserMeta *user_meta)
 Removes a user meta from an roi meta to which it is attached. More...
 
void nvds_remove_user_meta_from_object (NvDsObjectMeta *obj_meta, NvDsUserMeta *user_meta)
 Removes a user meta from an object meta to which it is attached. More...
 
gboolean nvds_get_current_metadata_info (NvDsBatchMeta *batch_meta)
 A debugging function; prints current metadata information available after inference. More...
 
gpointer nvds_batch_meta_copy_func (gpointer data, gpointer user_data)
 Copies or transforms meta data from one buffer to another. More...
 
void nvds_batch_meta_release_func (gpointer data, gpointer user_data)
 Releases metadata from a batch meta. More...
 
NvDsFrameMetanvds_get_nth_frame_meta (NvDsFrameMetaList *frame_meta_list, guint index)
 Returns a pointer to a specified frame meta in the frame meta list. More...
 
void nvds_clear_frame_meta_list (NvDsBatchMeta *batch_meta, NvDsFrameMetaList *meta_list)
 Removes all of the frame metadata attached to a batch meta. More...
 
void nvds_clear_obj_meta_list (NvDsFrameMeta *frame_meta, NvDsObjectMetaList *meta_list)
 Removes all the object metadata attached to a frame meta. More...
 
void nvds_clear_classifier_meta_list (NvDsObjectMeta *obj_meta, NvDsClassifierMetaList *meta_list)
 Removes all of the classifier metadata attached to an object meta. More...
 
void nvds_clear_label_info_meta_list (NvDsClassifierMeta *classifier_meta, NvDsLabelInfoList *meta_list)
 Removes all of the label info metadata attached to a classifier meta. More...
 
void nvds_clear_display_meta_list (NvDsFrameMeta *frame_meta, NvDisplayMetaList *meta_list)
 Removes all of the display metadata attached to a frame meta. More...
 
void nvds_clear_batch_user_meta_list (NvDsBatchMeta *batch_meta, NvDsUserMetaList *meta_list)
 Removes all of the user metadata attached to the batch meta. More...
 
void nvds_clear_frame_user_meta_list (NvDsFrameMeta *frame_meta, NvDsUserMetaList *meta_list)
 Removes all of the user metadata attached to the frame meta. More...
 
void nvds_clear_obj_user_meta_list (NvDsObjectMeta *object_meta, NvDsUserMetaList *meta_list)
 Removes all of the user metadata attached to an object meta. More...
 
NvDsMetaListnvds_clear_meta_list (NvDsBatchMeta *batch_meta, NvDsMetaList *meta_list, NvDsMetaPool *meta_pool)
 Removes all of the metadata elements attached to a metadata list. More...
 
void nvds_copy_frame_meta (NvDsFrameMeta *src_frame_meta, NvDsFrameMeta *dst_frame_meta)
 Makes a deep copy of a frame meta to another frame meta. More...
 
void nvds_copy_obj_meta (NvDsObjectMeta *src_object_meta, NvDsObjectMeta *dst_object_meta)
 Makes a deep copy of an object meta to another object meta. More...
 
void nvds_copy_classifier_meta (NvDsClassifierMeta *src_classifier_meta, NvDsClassifierMeta *dst_classifier_meta)
 Makes a deep copy of a classifier meta to another classifier meta. More...
 
void nvds_copy_label_info_meta (NvDsLabelInfo *src_label_info, NvDsLabelInfo *dst_label_info)
 Makes a deep copy of a label info meta to another label info meta. More...
 
void nvds_copy_display_meta (NvDsDisplayMeta *src_display_meta, NvDsDisplayMeta *dst_display_meta)
 Makes a deep copy of a display meta to another display meta. More...
 
void nvds_copy_batch_user_meta_list (NvDsUserMetaList *src_user_meta_list, NvDsBatchMeta *dst_batch_meta)
 Makes a deep copy of a user meta list to the user meta list in a specified batch meta. More...
 
void nvds_copy_frame_user_meta_list (NvDsUserMetaList *src_user_meta_list, NvDsFrameMeta *dst_frame_meta)
 Makes a deep copy of a source user meta list to the user meta list in a specified frame meta. More...
 
void nvds_copy_obj_user_meta_list (NvDsUserMetaList *src_user_meta_list, NvDsObjectMeta *dst_object_meta)
 Makes a deep copy of a source user meta list to the user meta list in a specified object meta. More...
 
void nvds_copy_display_meta_list (NvDisplayMetaList *src_display_meta_list, NvDsFrameMeta *dst_frame_meta)
 Makes a deep copy of a source display meta list to the display meta list in a specified frame meta. More...
 
void nvds_copy_frame_meta_list (NvDsFrameMetaList *src_frame_meta_list, NvDsBatchMeta *dst_batch_meta)
 Makes a deep copy of a source frame meta list to the frame meta list in a specified batch meta. More...
 
void nvds_copy_obj_meta_list (NvDsObjectMetaList *src_obj_meta_list, NvDsFrameMeta *dst_frame_meta)
 Makes a deep copy of a source object meta list to the object meta list in a specified frame meta. More...
 
void nvds_copy_classification_list (NvDsClassifierMetaList *src_classifier_meta_list, NvDsObjectMeta *dst_object_meta)
 Makes a deep copy of a source classifier meta list to the classifier meta list in a specified object meta. More...
 
void nvds_copy_label_info_list (NvDsLabelInfoList *src_label_info_list, NvDsClassifierMeta *dst_classifier_meta)
 Makes a deep copy of a source label info meta list to the label info meta list in a specified classifier meta. More...
 
NvDsMetaType nvds_get_user_meta_type (gchar *meta_descriptor)
 Generates a unique user metadata type from a specified string describing user-specific metadata. More...
 
NvDsBatchMetanvds_create_audio_batch_meta (guint max_batch_size)
 Creates a batch metadata structure for a audio batch of specified size. More...
 
gboolean nvds_destroy_audio_batch_meta (NvDsBatchMeta *batch_meta)
 Destroys a batch metadata structure. More...
 
NvDsAudioFrameMetanvds_acquire_audio_frame_meta_from_pool (NvDsBatchMeta *batch_meta)
 Acquires a audio frame meta from a batch's audio frame meta pool. More...
 
void nvds_add_audio_frame_meta_to_audio_batch (NvDsBatchMeta *batch_meta, NvDsAudioFrameMeta *frame_meta)
 Adds a audio frame meta to a batch meta. More...
 
void nvds_remove_audio_frame_meta_from_audio_batch (NvDsBatchMeta *batch_meta, NvDsAudioFrameMeta *frame_meta)
 Removes a audio frame meta from a batch meta. More...
 
void nvds_add_classifier_meta_to_audio_frame (NvDsAudioFrameMeta *frame_meta, NvDsClassifierMeta *classifier_meta)
 Adds a classifier meta the audio frame meta. More...
 
void nvds_remove_classifier_meta_from_audio_frame (NvDsAudioFrameMeta *frame_meta, NvDsClassifierMeta *classifier_meta)
 Removes a classifier meta from the audio frame meta to which it is attached. More...
 
void nvds_add_user_meta_to_audio_batch (NvDsBatchMeta *batch_meta, NvDsUserMeta *user_meta)
 Add a user meta to a audio batch meta. More...
 
void nvds_add_user_meta_to_audio_frame (NvDsAudioFrameMeta *frame_meta, NvDsUserMeta *user_meta)
 Add a user meta to a audio frame meta. More...
 
void nvds_remove_user_meta_from_audio_batch (NvDsBatchMeta *batch_meta, NvDsUserMeta *user_meta)
 Removes a user meta from a audio batch meta to which it is attached. More...
 
void nvds_remove_user_meta_from_audio_frame (NvDsAudioFrameMeta *frame_meta, NvDsUserMeta *user_meta)
 Removes a user meta from a audio frame meta to which it is attached. More...
 
gpointer nvds_audio_batch_meta_copy_func (gpointer data, gpointer user_data)
 Copies or transforms meta data from one buffer to another. More...
 
void nvds_audio_batch_meta_release_func (gpointer data, gpointer user_data)
 Releases metadata from a batch meta. More...
 
NvDsAudioFrameMetanvds_get_nth_audio_frame_meta (NvDsFrameMetaList *frame_meta_list, guint index)
 Returns a pointer to a specified frame meta in the frame meta list. More...
 
void nvds_clear_audio_frame_meta_list (NvDsBatchMeta *batch_meta, NvDsFrameMetaList *meta_list)
 Removes all of the frame metadata attached to a batch meta. More...
 
void nvds_clear_audio_classifier_meta_list (NvDsAudioFrameMeta *frame_meta, NvDsClassifierMetaList *meta_list)
 Removes all of the classifier metadata attached to an audio frame meta. More...
 
void nvds_clear_audio_batch_user_meta_list (NvDsBatchMeta *batch_meta, NvDsUserMetaList *meta_list)
 Removes all of the user metadata attached to the audio batch meta. More...
 
void nvds_clear_audio_frame_user_meta_list (NvDsAudioFrameMeta *frame_meta, NvDsUserMetaList *meta_list)
 Removes all of the user metadata attached to the audio frame meta. More...
 
void nvds_copy_audio_batch_user_meta_list (NvDsUserMetaList *src_user_meta_list, NvDsBatchMeta *dst_batch_meta)
 Makes a deep copy of a user meta list to the user meta list in a specified audio batch meta. More...
 
void nvds_copy_audio_frame_meta (NvDsAudioFrameMeta *src_frame_meta, NvDsAudioFrameMeta *dst_frame_meta)
 Makes a deep copy of a frame meta to another frame meta. More...
 
void nvds_copy_audio_frame_user_meta_list (NvDsUserMetaList *src_user_meta_list, NvDsAudioFrameMeta *dst_frame_meta)
 Makes a deep copy of a source user meta list to the user meta list in a specified audio frame meta. More...
 
void nvds_copy_audio_frame_meta_list (NvDsFrameMetaList *src_frame_meta_list, NvDsBatchMeta *dst_batch_meta)
 Makes a deep copy of a source frame meta list to the frame meta list in a specified batch meta. More...
 
void nvds_copy_audio_classification_list (NvDsClassifierMetaList *src_classifier_meta_list, NvDsAudioFrameMeta *dst_frame_meta)
 Makes a deep copy of a source classifier meta list to the classifier meta list in a specified object meta. More...
 

Macro Definition Documentation

#define MAX_ELEMENTS_IN_DISPLAY_META   16

Defines the maximum number of elements that a given display meta can hold.

Definition at line 51 of file nvdsmeta.h.

#define MAX_LABEL_SIZE   128

Defines the maximum size of an array for storing a text result.

Definition at line 48 of file nvdsmeta.h.

#define MAX_RESERVED_FIELDS   4

Definition at line 46 of file nvdsmeta.h.

#define MAX_USER_FIELDS   4

Defines the number of additional fields available to the user in the metadata structure.

Definition at line 44 of file nvdsmeta.h.

#define UNTRACKED_OBJECT_ID   0xFFFFFFFFFFFFFFFF

Defines an untracked object ID.

Definition at line 53 of file nvdsmeta.h.

Typedef Documentation

typedef GList NvDisplayMetaList

Definition at line 58 of file nvdsmeta.h.

Holds metadata for a audio frame in a batch.

typedef struct _NvDsBaseMeta NvDsBaseMeta

Holds information about base metadata of a given metadata type.

typedef struct _NvDsBatchMeta NvDsBatchMeta

Holds information about a formed batch containing frames from different sources.

NOTE: Both Video and Audio metadata uses the same NvDsBatchMeta type. NOTE: Audio batch metadata is formed within nvinferaudio plugin and will not be corresponding to any one buffer output from nvinferaudio. The NvDsBatchMeta for audio is attached to the last input buffer when the audio batch buffering reach configurable threshold (audio frame length) and this is when inference output is available.

Holds classifier metadata for an object.

typedef GList NvDsClassifierMetaList

Definition at line 59 of file nvdsmeta.h.

Holds unclipped positional bounding box coordinates of the object processed by the component.

Holds display metadata that the user can specify in the frame.

typedef void NvDsElementMeta

Definition at line 62 of file nvdsmeta.h.

typedef struct _NvDsFrameMeta NvDsFrameMeta

Holds metadata for a frame in a batch.

typedef GList NvDsFrameMetaList

Definition at line 55 of file nvdsmeta.h.

typedef struct _NvDsLabelInfo NvDsLabelInfo

Holds label metadata for the classifier.

typedef GList NvDsLabelInfoList

Definition at line 60 of file nvdsmeta.h.

typedef gpointer(* NvDsMetaCopyFunc)(gpointer data, gpointer user_data)

Defines the type of a callback to copy metadata.

The callback is passed pointers to source metadata. It allocates the required memory, copies the content from the source metadata and returns a pointer to the destination.

Parameters
[in]dataA pointer to the source metadata.
[in]user_dataA pointer to user-specific data.

Definition at line 78 of file nvdsmeta.h.

typedef GList NvDsMetaList

Definition at line 61 of file nvdsmeta.h.

typedef struct _NvDsMetaPool NvDsMetaPool

Holds information about a given metadata pool.

typedef void(* NvDsMetaReleaseFunc)(gpointer data, gpointer user_data)

Defines the type of a callback to free metadata.

The callback is passed a pointer to metadata created by NvDsMetaCopyFunc(). It frees the metadata and any other resources that the metadata uses.

Parameters
[in]dataA pointer to the metadata to be freed.
[in]user_dataA pointer to user-specific data.

Definition at line 90 of file nvdsmeta.h.

Holds metadata for an object in the frame.

typedef GList NvDsObjectMetaList

Definition at line 57 of file nvdsmeta.h.

typedef struct _NvDsUserMeta NvDsUserMeta

Holds user metadata.

typedef GList NvDsUserMetaList

Definition at line 56 of file nvdsmeta.h.

Enumeration Type Documentation

Specifies the type of metadata.

All metadata types are subtypes of NvDsMetaType. Members that represent NVIDIA-defined types are in the range from NVDS_BATCH_META to NVDS_START_USER_META. User-defined types may be assigned values greater than or equal to NVDS_START_USER_META.

Enumerator
NVDS_INVALID_META 
NVDS_BATCH_META 

Specifies metadata type for formed batch.

NVDS_FRAME_META 

Specifies metadata type for frame.

NVDS_OBJ_META 

Specifies metadata type for a detected object.

NVDS_DISPLAY_META 

Specifies metadata type for display.

NVDS_CLASSIFIER_META 

Specifies metadata type for an object classifier.

NVDS_LABEL_INFO_META 

Specifies metadata type for a label assigned by a classifier.

NVDS_USER_META 

Reserved for internal use.

NVDS_PAYLOAD_META 

Specifies metadata type for a payload generated by a message converter.

NVDS_EVENT_MSG_META 

Specifies metadata type for a payload generated by a message broker.

NVDS_OPTICAL_FLOW_META 

Specifies metadata type for an optical flow.

NVDS_LATENCY_MEASUREMENT_META 

Specifies metadata type for a latency measurement.

NVDSINFER_TENSOR_OUTPUT_META 

Specifies metadata type for raw inference output attached by Gst-nvinfer.

See also
NvDsInferTensorMeta for details.
NVDSINFER_SEGMENTATION_META 

Specifies metadata type for segmentation model output attached by Gst-nvinfer.

See also
NvDsInferSegmentationMeta for details.
NVDS_CROP_IMAGE_META 

Specifies metadata type for JPEG-encoded object crops.

See the deepstream-image-meta-test app for details.

NVDS_TRACKER_PAST_FRAME_META 

metadata type to be set for tracking previous frames

NVDS_AUDIO_BATCH_META 

Specifies metadata type for formed audio batch.

NVDS_AUDIO_FRAME_META 

Specifies metadata type for audio frame.

NVDS_PREPROCESS_FRAME_META 

Specifies metadata type for preprocess scale&converted ROIs attached by Gst-nvdspreprocess.

See also
NvDsPreProcessFrameMeta for details.
NVDS_PREPROCESS_BATCH_META 

Specifies metadata type for preprocess batch level attached by Gst-nvdspreprocess.

See also
NvDsPreProcessBatchMeta for details.
NVDS_CUSTOM_MSG_BLOB 

Specifies user defined custom message blob to be part of payload generated.

NVDS_RESERVED_META 

Reserved field.

NVDS_GST_CUSTOM_META 

Specifies the start of a range of enum values that represent types of NVIDIA-defined Gst metas.

The range is from NVDS_GST_CUSTOM_META to NVDS_GST_CUSTOM_META+4096, inclusive.

NVDS_START_USER_META 

Start adding user specific meta types from here.

Specifies the start of a range of enum values that represent custom (application-specific) Gst meta types. A custom meta type may be assigned any enum value equal to or larger than this.

Such Gst metas may be attached by GStreamer plugins upstream from Gst-nvstreammux. They may have any contents that is a superset of the metadata in an NvDsFrameMeta.

NVDS_FORCE32_META 

Definition at line 99 of file nvdsmeta.h.

Function Documentation

NvDsAudioFrameMeta* nvds_acquire_audio_frame_meta_from_pool ( NvDsBatchMeta batch_meta)

Acquires a audio frame meta from a batch's audio frame meta pool.

You must acquire a audio frame meta before you can fill it with audio frame metadata.

Parameters
[in]batch_metaA pointer to batch meta from which to acquire a audio frame meta.
Returns
A pointer to the acquired audio frame meta.
NvDsClassifierMeta* nvds_acquire_classifier_meta_from_pool ( NvDsBatchMeta batch_meta)

Acquires a classifier meta from a batch meta's classifier meta pool.

You must acquire a classifier meta from the classifier meta pool before you can fill it with classifier metadata.

Parameters
[in]batch_metaA pointer to the batch meta from which to acquire a classifier meta.
Returns
The classifier meta acquired from the batch meta's classifier meta pool.
NvDsDisplayMeta* nvds_acquire_display_meta_from_pool ( NvDsBatchMeta batch_meta)

Acquires a display meta from a batch meta's display meta pool.

You must acquire a display meta before you can fill it with display metadata.

Parameters
[in]batch_metaA pointer to the batch meta from which to acquire a display meta.
Returns
The display meta acquired from the batch meta's display meta pool.
NvDsFrameMeta* nvds_acquire_frame_meta_from_pool ( NvDsBatchMeta batch_meta)

Acquires a frame meta from a batch's frame meta pool.

You must acquire a frame meta before you can fill it with frame metadata.

Parameters
[in]batch_metaA pointer to batch meta from which to acquire a frame meta.
Returns
A pointer to the acquired frame meta.
NvDsLabelInfo* nvds_acquire_label_info_meta_from_pool ( NvDsBatchMeta batch_meta)

Acquires a label info meta from a batch meta's label info meta pool.

You must acquire a label info meta before you can fill it and add it to a classifier meta.

Parameters
[in]batch_metaA pointer to the batch meta from which to acquire a label info meta.
Returns
The label info meta acquired from the batch meta's label info meta pool.
void nvds_acquire_meta_lock ( NvDsBatchMeta batch_meta)

Acquires a lock before updating metadata.

Parameters
[in]batch_metaA pointer to the NvDsBatchMeta structure to be locked.
NvDsObjectMeta* nvds_acquire_obj_meta_from_pool ( NvDsBatchMeta batch_meta)

Acquires an object meta from a batch meta's object meta pool.

You must acquire an object meta before you can fill it with object metadata.

Parameters
[in]batch_metaA pointer to the batch meta from which to acquire an object meta.
Returns
A pointer to the acquired object meta.
NvDsUserMeta* nvds_acquire_user_meta_from_pool ( NvDsBatchMeta batch_meta)

Acquires a user meta from a batch meta's user meta pool.

You must acquire a user meta before you can fill it with user metdata and add it to a batch, frame, or object meta (call nvds_add_user_data_to_batch(), nvds_add_user_data_to_frame(), or nvds_add_user_data_to_obj()).

Parameters
[in]batch_metaA pointer to the batch meta from which to acquire a user meta.
void nvds_add_audio_frame_meta_to_audio_batch ( NvDsBatchMeta batch_meta,
NvDsAudioFrameMeta frame_meta 
)

Adds a audio frame meta to a batch meta.

Parameters
[in]batch_metaA pointer to the NvDsBatchMeta to which frame_meta is to be added.
[in]frame_metaA pointer to a frame meta to be added to batch_meta.
void nvds_add_classifier_meta_to_audio_frame ( NvDsAudioFrameMeta frame_meta,
NvDsClassifierMeta classifier_meta 
)

Adds a classifier meta the audio frame meta.

You must acquire a classifier meta with nvds_acquire_classifier_meta_from_pool() and fill it with classifier metadata before you add it to the audio frame metadata.

Parameters
[in]frame_metaA pointer to the frame meta to which classifier_meta is to be added.
[in]classifier_metaA pointer to the classifier meta to be added to obj_meta.
void nvds_add_classifier_meta_to_object ( NvDsObjectMeta obj_meta,
NvDsClassifierMeta classifier_meta 
)

Adds a classifier meta to the appropriate object meta.

You must acquire a classifier meta with nvds_acquire_classifier_meta_from_pool() and fill it with classifier metadata before you add it to the object metadata.

Parameters
[in]obj_metaA pointer to the object meta to which classifier_meta is to be added.
[in]classifier_metaA pointer to the classifier meta to be added to obj_meta.
void nvds_add_classifier_meta_to_roi ( NvDsRoiMeta roi_meta,
NvDsClassifierMeta classifier_meta 
)

Adds a classifier meta to the appropriate roi meta.

You must acquire a classifier meta with nvds_acquire_classifier_meta_from_pool() and fill it with classifier metadata before you add it to the roi metadata.

Parameters
[in]roi_metaA pointer to the roi meta to which classifier_meta is to be added.
[in]classifier_metaA pointer to the classifier meta to be added to roi_meta.
void nvds_add_display_meta_to_frame ( NvDsFrameMeta frame_meta,
NvDsDisplayMeta display_meta 
)

Adds a display meta to the appropriate frame meta.

You must acquire a display meta with nvds_)acquire_display_meta_from_pool() and fill it with display metadata before you can add it to the frame meta.

Parameters
[in]frame_metaA pointer to frame meta to which display_meta is to be added.
[in]display_metaA pointer to the display meta to be added to frame_meta.
void nvds_add_frame_meta_to_batch ( NvDsBatchMeta batch_meta,
NvDsFrameMeta frame_meta 
)

Adds a frame meta to a batch meta.

Parameters
[in]batch_metaA pointer to the NvDsBatchMeta to which frame_meta is to be added.
[in]frame_metaA pointer to a frame meta to be added to batch_meta.
void nvds_add_label_info_meta_to_classifier ( NvDsClassifierMeta classifier_meta,
NvDsLabelInfo label_info_meta 
)

Adds a label info meta to a classifier meta.

Parameters
[in]classifier_metaA pointer to the classifier meta to which label_info_meta is to be added.
[in]label_info_metaA pointer to the label info meta to be added to classifier_meta.
void nvds_add_obj_meta_to_frame ( NvDsFrameMeta frame_meta,
NvDsObjectMeta obj_meta,
NvDsObjectMeta obj_parent 
)

Adds an object meta to a frame meta.

You must acquire the object meta with nvds_acquire_object_meta_from_pool() and fill it with metadata before you add to to the frame meta.

Parameters
[in]frame_metaA pointer to the frame meta to which obj_meta is to be added.
[in]obj_metaA pointer to an object meta to be added to frame_meta.
[in]obj_parentA pointer to the this object meta's parent object meta. This pointer is stored in obj_meta->parent.
void nvds_add_user_meta_to_audio_batch ( NvDsBatchMeta batch_meta,
NvDsUserMeta user_meta 
)

Add a user meta to a audio batch meta.

Parameters
[in]batch_metaA pointer to batch meta to which user_meta is to be added.
[in]user_metaA pointer to a user meta to be added to batch_meta.
void nvds_add_user_meta_to_audio_frame ( NvDsAudioFrameMeta frame_meta,
NvDsUserMeta user_meta 
)

Add a user meta to a audio frame meta.

Parameters
[in]frame_metaA pointer to the frame meta to which user_meta is to be added.
[in]user_metaA pointer to a user meta to be added to frame_meta.
void nvds_add_user_meta_to_batch ( NvDsBatchMeta batch_meta,
NvDsUserMeta user_meta 
)

Add a user meta to a batch meta.

Parameters
[in]batch_metaA pointer to batch meta to which user_meta is to be added.
[in]user_metaA pointer to a user meta to be added to batch_meta.
void nvds_add_user_meta_to_frame ( NvDsFrameMeta frame_meta,
NvDsUserMeta user_meta 
)

Add a user meta to a frame meta.

Parameters
[in]frame_metaA pointer to the frame meta to which user_meta is to be added.
[in]user_metaA pointer to a user meta to be added to frame_meta.
void nvds_add_user_meta_to_obj ( NvDsObjectMeta obj_meta,
NvDsUserMeta user_meta 
)

Add a user meta user to an object meta.

Parameters
[in]obj_metaA pointer to the object meta to which user_meta is to be added.
[in]user_metaA pointer to the user meta to be added to obj_meta.
void nvds_add_user_meta_to_roi ( NvDsRoiMeta roi_meta,
NvDsUserMeta user_meta 
)

Add a user meta user to an roi meta.

Parameters
[in]roi_metaA pointer to the roi meta to which user_meta is to be added.
[in]user_metaA pointer to the user meta to be added to roi_meta.
gpointer nvds_audio_batch_meta_copy_func ( gpointer  data,
gpointer  user_data 
)

Copies or transforms meta data from one buffer to another.

Parameters
[in]dataA pointer to a batch meta (of type NvDsBatchMeta), cast to gpointer.
[in]user_dataCurrently not in use and should be set to NULL.
Returns
A pointer to a metadata structure, to be cast to type NvDsBatchMeta.
void nvds_audio_batch_meta_release_func ( gpointer  data,
gpointer  user_data 
)

Releases metadata from a batch meta.

Parameters
[in]dataA pointer to a batch meta (type NvDsBatchMeta), cast to gpointer.
[in]user_dataCurrently not in use and should be set to NULL.
gpointer nvds_batch_meta_copy_func ( gpointer  data,
gpointer  user_data 
)

Copies or transforms meta data from one buffer to another.

Parameters
[in]dataA pointer to a batch meta (of type NvDsBatchMeta), cast to gpointer.
[in]user_dataCurrently not in use and should be set to NULL.
Returns
A pointer to a metadata structure, to be cast to type NvDsBatchMeta.
void nvds_batch_meta_release_func ( gpointer  data,
gpointer  user_data 
)

Releases metadata from a batch meta.

Parameters
[in]dataA pointer to a batch meta (type NvDsBatchMeta), cast to gpointer.
[in]user_dataCurrently not in use and should be set to NULL.
void nvds_clear_audio_batch_user_meta_list ( NvDsBatchMeta batch_meta,
NvDsUserMetaList meta_list 
)

Removes all of the user metadata attached to the audio batch meta.

Parameters
[in]batch_metaA pointer to the audio batch meta whose user meta list is to be cleared.
[in]meta_listA pointer to the user meta list to be cleared
void nvds_clear_audio_classifier_meta_list ( NvDsAudioFrameMeta frame_meta,
NvDsClassifierMetaList meta_list 
)

Removes all of the classifier metadata attached to an audio frame meta.

Parameters
[in]frame_metaA pointer to NvDsAudioFrameMeta from which NvDsClassifierMetaList needs to be cleared
[in]meta_listA pointer to NvDsClassifierMetaList which needs to be cleared
void nvds_clear_audio_frame_meta_list ( NvDsBatchMeta batch_meta,
NvDsFrameMetaList meta_list 
)

Removes all of the frame metadata attached to a batch meta.

Parameters
[in]batch_metaA pointer to the batch whose frame meta list is to be cleared.
[in]meta_listA pointer to the frame meta list to be cleared.
void nvds_clear_audio_frame_user_meta_list ( NvDsAudioFrameMeta frame_meta,
NvDsUserMetaList meta_list 
)

Removes all of the user metadata attached to the audio frame meta.

Parameters
[in]frame_metaA pointer to the audio frame meta whose user meta list is to be cleared.
[in]meta_listA pointer to the user meta list to be cleared.
void nvds_clear_batch_user_meta_list ( NvDsBatchMeta batch_meta,
NvDsUserMetaList meta_list 
)

Removes all of the user metadata attached to the batch meta.

Parameters
[in]batch_metaA pointer to the batch meta whose user meta list is to be cleared.
[in]meta_listA pointer to the user meta list to be cleared
void nvds_clear_classifier_meta_list ( NvDsObjectMeta obj_meta,
NvDsClassifierMetaList meta_list 
)

Removes all of the classifier metadata attached to an object meta.

Parameters
[in]obj_metaA pointer to NvDsObjectMeta from which NvDsClassifierMetaList needs to be cleared
[in]meta_listA pointer to NvDsClassifierMetaList which needs to be cleared
void nvds_clear_display_meta_list ( NvDsFrameMeta frame_meta,
NvDisplayMetaList meta_list 
)

Removes all of the display metadata attached to a frame meta.

Parameters
[in]frame_metaA pointer to the frame meta whose display meta list is to be cleared.
[in]meta_listA pointer to the display meta list to be cleared.
void nvds_clear_frame_meta_list ( NvDsBatchMeta batch_meta,
NvDsFrameMetaList meta_list 
)

Removes all of the frame metadata attached to a batch meta.

Parameters
[in]batch_metaA pointer to the batch whose frame meta list is to be cleared.
[in]meta_listA pointer to the frame meta list to be cleared.
void nvds_clear_frame_user_meta_list ( NvDsFrameMeta frame_meta,
NvDsUserMetaList meta_list 
)

Removes all of the user metadata attached to the frame meta.

Parameters
[in]frame_metaA pointer to the frame meta whose user meta list is to be cleared.
[in]meta_listA pointer to the user meta list to be cleared.
void nvds_clear_label_info_meta_list ( NvDsClassifierMeta classifier_meta,
NvDsLabelInfoList meta_list 
)

Removes all of the label info metadata attached to a classifier meta.

Parameters
[in]classifier_metaA pointer to the classifier meta whose label info meta list is to be cleared.
[in]meta_listA pointer to the label info meta list to be cleared.
NvDsMetaList* nvds_clear_meta_list ( NvDsBatchMeta batch_meta,
NvDsMetaList meta_list,
NvDsMetaPool meta_pool 
)

Removes all of the metadata elements attached to a metadata list.

Parameters
[in]batch_metaA pointer to a batch meta.
[in]meta_listA pointer to meta list to be cleared.
[in]meta_poolA pointer to the meta pool that contains meta_list.
Returns
A pointer to the updated meta list.
void nvds_clear_obj_meta_list ( NvDsFrameMeta frame_meta,
NvDsObjectMetaList meta_list 
)

Removes all the object metadata attached to a frame meta.

Parameters
[in]frame_metaA pointer to the frame meta whose object meta list is to be cleared.
[in]meta_listA pointer to the object meta list to be cleared.
void nvds_clear_obj_user_meta_list ( NvDsObjectMeta object_meta,
NvDsUserMetaList meta_list 
)

Removes all of the user metadata attached to an object meta.

Parameters
[in]object_metaA pointer to the object meta whose user meta list is to be cleared.
[in]meta_listA pointer to the user meta list to be cleared.
void nvds_copy_audio_batch_user_meta_list ( NvDsUserMetaList src_user_meta_list,
NvDsBatchMeta dst_batch_meta 
)

Makes a deep copy of a user meta list to the user meta list in a specified audio batch meta.

Parameters
[in]src_user_meta_listA pointer to the source user meta list.
[in]dst_batch_metaA pointer to the destination batch meta.
void nvds_copy_audio_classification_list ( NvDsClassifierMetaList src_classifier_meta_list,
NvDsAudioFrameMeta dst_frame_meta 
)

Makes a deep copy of a source classifier meta list to the classifier meta list in a specified object meta.

Parameters
[in]src_classifier_meta_listA pointer to the source classifier meta list.
[in]dst_frame_metaA pointer to the destination audio frame meta.
void nvds_copy_audio_frame_meta ( NvDsAudioFrameMeta src_frame_meta,
NvDsAudioFrameMeta dst_frame_meta 
)

Makes a deep copy of a frame meta to another frame meta.

Parameters
[in]src_frame_metaA pointer to the source frame meta.
[in]dst_frame_metaA pointer to the destination frame meta.
void nvds_copy_audio_frame_meta_list ( NvDsFrameMetaList src_frame_meta_list,
NvDsBatchMeta dst_batch_meta 
)

Makes a deep copy of a source frame meta list to the frame meta list in a specified batch meta.

Parameters
[in]src_frame_meta_listA pointer to the source frame meta list.
[in]dst_batch_metaA pointer to the destination batch meta.
void nvds_copy_audio_frame_user_meta_list ( NvDsUserMetaList src_user_meta_list,
NvDsAudioFrameMeta dst_frame_meta 
)

Makes a deep copy of a source user meta list to the user meta list in a specified audio frame meta.

Parameters
[in]src_user_meta_listA pointer to the source user meta list.
[in]dst_frame_metaA pointer to the destination audio frame meta.
void nvds_copy_batch_user_meta_list ( NvDsUserMetaList src_user_meta_list,
NvDsBatchMeta dst_batch_meta 
)

Makes a deep copy of a user meta list to the user meta list in a specified batch meta.

Parameters
[in]src_user_meta_listA pointer to the source user meta list.
[in]dst_batch_metaA pointer to the destination batch meta.
void nvds_copy_classification_list ( NvDsClassifierMetaList src_classifier_meta_list,
NvDsObjectMeta dst_object_meta 
)

Makes a deep copy of a source classifier meta list to the classifier meta list in a specified object meta.

Parameters
[in]src_classifier_meta_listA pointer to the source classifier meta list.
[in]dst_object_metaA pointer to the destination object meta.
void nvds_copy_classifier_meta ( NvDsClassifierMeta src_classifier_meta,
NvDsClassifierMeta dst_classifier_meta 
)

Makes a deep copy of a classifier meta to another classifier meta.

Parameters
[in]src_classifier_metaA pointer to the source classifier meta.
[in]dst_classifier_metaA pointer to the destination classifier meta.
void nvds_copy_display_meta ( NvDsDisplayMeta src_display_meta,
NvDsDisplayMeta dst_display_meta 
)

Makes a deep copy of a display meta to another display meta.

Parameters
[in]src_display_metaA pointer to the source display meta.
[in]dst_display_metaA pointer to destination display meta.
void nvds_copy_display_meta_list ( NvDisplayMetaList src_display_meta_list,
NvDsFrameMeta dst_frame_meta 
)

Makes a deep copy of a source display meta list to the display meta list in a specified frame meta.

Parameters
[in]src_display_meta_listA pointer to the source display meta list.
[in]dst_frame_metaA pointer to the destination frame meta.
void nvds_copy_frame_meta ( NvDsFrameMeta src_frame_meta,
NvDsFrameMeta dst_frame_meta 
)

Makes a deep copy of a frame meta to another frame meta.

Parameters
[in]src_frame_metaA pointer to the source frame meta.
[in]dst_frame_metaA pointer to the destination frame meta.
void nvds_copy_frame_meta_list ( NvDsFrameMetaList src_frame_meta_list,
NvDsBatchMeta dst_batch_meta 
)

Makes a deep copy of a source frame meta list to the frame meta list in a specified batch meta.

Parameters
[in]src_frame_meta_listA pointer to the source frame meta list.
[in]dst_batch_metaA pointer to the destination batch meta.
void nvds_copy_frame_user_meta_list ( NvDsUserMetaList src_user_meta_list,
NvDsFrameMeta dst_frame_meta 
)

Makes a deep copy of a source user meta list to the user meta list in a specified frame meta.

Parameters
[in]src_user_meta_listA pointer to the source user meta list.
[in]dst_frame_metaA pointer to the destination frame meta.
void nvds_copy_label_info_list ( NvDsLabelInfoList src_label_info_list,
NvDsClassifierMeta dst_classifier_meta 
)

Makes a deep copy of a source label info meta list to the label info meta list in a specified classifier meta.

Parameters
[in]src_label_info_listA pointer to the source label info meta list.
[in]dst_classifier_metaA pointer to the destination classifier meta.
void nvds_copy_label_info_meta ( NvDsLabelInfo src_label_info,
NvDsLabelInfo dst_label_info 
)

Makes a deep copy of a label info meta to another label info meta.

Parameters
[in]src_label_infoA pointer to the source label info meta.
[in]dst_label_infoA pointer to the destination label info meta.
void nvds_copy_obj_meta ( NvDsObjectMeta src_object_meta,
NvDsObjectMeta dst_object_meta 
)

Makes a deep copy of an object meta to another object meta.

Parameters
[in]src_object_metaA pointer to the source object meta.
[in]dst_object_metaA pointer to the destination object meta.
void nvds_copy_obj_meta_list ( NvDsObjectMetaList src_obj_meta_list,
NvDsFrameMeta dst_frame_meta 
)

Makes a deep copy of a source object meta list to the object meta list in a specified frame meta.

Parameters
[in]src_obj_meta_listA pointer to the source object meta list.
[in]dst_frame_metaA pointer to the destination frame meta.
void nvds_copy_obj_user_meta_list ( NvDsUserMetaList src_user_meta_list,
NvDsObjectMeta dst_object_meta 
)

Makes a deep copy of a source user meta list to the user meta list in a specified object meta.

Parameters
[in]src_user_meta_listA pointer to the source user meta list.
[in]dst_object_metaA pointer to the destination object meta.
NvDsBatchMeta* nvds_create_audio_batch_meta ( guint  max_batch_size)

Creates a batch metadata structure for a audio batch of specified size.

Parameters
[in]max_batch_sizeThe maximum number of frames in the batch. @ return A pointer to the created structure.
NvDsBatchMeta* nvds_create_batch_meta ( guint  max_batch_size)

Creates a batch metadata structure for a batch of specified size.

Parameters
[in]max_batch_sizeThe maximum number of frames in the batch. @ return A pointer to the created structure.
gboolean nvds_destroy_audio_batch_meta ( NvDsBatchMeta batch_meta)

Destroys a batch metadata structure.

Parameters
[in]batch_metaA pointer to audio batch metadata structure to be destroyed.
Returns
True if the object was successfully destroyed, or false otherwise.
gboolean nvds_destroy_batch_meta ( NvDsBatchMeta batch_meta)

Destroys a batch metadata structure.

Parameters
[in]batch_metaA pointer to batch metadata structure to be destroyed.
Returns
True if the object was successfully destroyed, or false otherwise.
gboolean nvds_get_current_metadata_info ( NvDsBatchMeta batch_meta)

A debugging function; prints current metadata information available after inference.

This function should be called after inference.

Parameters
[in]batch_metaA pointer to a batch meta from which to print information.
Returns
NvDsAudioFrameMeta* nvds_get_nth_audio_frame_meta ( NvDsFrameMetaList frame_meta_list,
guint  index 
)

Returns a pointer to a specified frame meta in the frame meta list.

Parameters
[in]frame_meta_listA pointer to a list of pointers to frame metas.
[in]indexThe index of the frame meta to be returned.
Returns
A pointer to the index'th frame meta in the frame meta list.
NvDsFrameMeta* nvds_get_nth_frame_meta ( NvDsFrameMetaList frame_meta_list,
guint  index 
)

Returns a pointer to a specified frame meta in the frame meta list.

Parameters
[in]frame_meta_listA pointer to a list of pointers to frame metas.
[in]indexThe index of the frame meta to be returned.
Returns
A pointer to the index'th frame meta in the frame meta list.
NvDsMetaType nvds_get_user_meta_type ( gchar *  meta_descriptor)

Generates a unique user metadata type from a specified string describing user-specific metadata.

Parameters
[in]meta_descriptorA pointer to a string describing user-specific metadata. The string must be in the format ORG_NAME.COMPONENT_NAME.METADATA_DESCRIPTION, e.g. NVIDIA.NVINFER.TENSOR_METADATA.
void nvds_release_meta_lock ( NvDsBatchMeta batch_meta)

Releases the lock after updating metadata.

Parameters
[in]batch_metaA pointer to NvDsBatchMeta structure to be unlocked.
void nvds_remove_audio_frame_meta_from_audio_batch ( NvDsBatchMeta batch_meta,
NvDsAudioFrameMeta frame_meta 
)

Removes a audio frame meta from a batch meta.

Parameters
[in]batch_metaA pointer to the batch meta from which frame_meta is to be removed.
[in]frame_metaA pointer to the frame meta to be removed from batch_meta.
void nvds_remove_classifier_meta_from_audio_frame ( NvDsAudioFrameMeta frame_meta,
NvDsClassifierMeta classifier_meta 
)

Removes a classifier meta from the audio frame meta to which it is attached.

Parameters
[in]frame_metaA pointer to the frame meta from which classifier_meta is to be removed.
[in]classifier_metaA pointer to the classifier meta to be removed from frame_meta.
void nvds_remove_classifier_meta_from_obj ( NvDsObjectMeta obj_meta,
NvDsClassifierMeta classifier_meta 
)

Removes a classifier meta from the object meta to which it is attached.

Parameters
[in]obj_metaA pointer to the object meta from which classifier_meta is to be removed.
[in]classifier_metaA pointer to the classifier meta to be removed from obj_meta.
void nvds_remove_classifier_meta_from_roi ( NvDsRoiMeta roi_meta,
NvDsClassifierMeta classifier_meta 
)

Removes a classifier meta from the roi meta to which it is attached.

Parameters
[in]roi_metaA pointer to the roi meta from which classifier_meta is to be removed.
[in]classifier_metaA pointer to the classifier meta to be removed from roi_meta.
void nvds_remove_display_meta_from_frame ( NvDsFrameMeta frame_meta,
NvDsDisplayMeta display_meta 
)

Removes a display meta from the frame meta to which it is attached.

Parameters
[in]frame_metaA pointer to the frame meta from which display_meta is to be removed.
[in]display_metaA pointer to the display meta to be removed from frame_meta.
void nvds_remove_frame_meta_from_batch ( NvDsBatchMeta batch_meta,
NvDsFrameMeta frame_meta 
)

Removes a frame meta from a batch meta.

Parameters
[in]batch_metaA pointer to the batch meta from which frame_meta is to be removed.
[in]frame_metaA pointer to the frame meta to be removed from batch_meta.
void nvds_remove_label_info_meta_from_classifier ( NvDsClassifierMeta classifier_meta,
NvDsLabelInfo label_info_meta 
)

Removes a label info meta from the classifier meta to which it is attached.

Parameters
[in]classifier_metaA pointer to the classifier meta from which label_info_meta is to be removed.
[in]label_info_metaA pointer to the label info meta to be removed from classifier_meta.
void nvds_remove_obj_meta_from_frame ( NvDsFrameMeta frame_meta,
NvDsObjectMeta obj_meta 
)

Removes an object meta from the frame meta to which it is attached.

Parameters
[in]frame_metaA pointer to frame meta from which obj_meta is to be removed.
[in]obj_metaA pointer to the object meta to be removed from frame_meta.
void nvds_remove_user_meta_from_audio_batch ( NvDsBatchMeta batch_meta,
NvDsUserMeta user_meta 
)

Removes a user meta from a audio batch meta to which it is attached.

Parameters
[in]batch_metaA pointer to the audio batch meta from which user_meta is to be removed.
[in]user_metaA pointer to the user meta to be removed from batch_meta.

returns acquired NvDsUserMeta pointer from user meta pool

void nvds_remove_user_meta_from_audio_frame ( NvDsAudioFrameMeta frame_meta,
NvDsUserMeta user_meta 
)

Removes a user meta from a audio frame meta to which it is attached.

Parameters
[in]frame_metaA pointer to the frame meta from which user_meta is to be removed.
[in]user_metaA pointer to the user meta to be removed from frame_meta.
void nvds_remove_user_meta_from_batch ( NvDsBatchMeta batch_meta,
NvDsUserMeta user_meta 
)

Removes a user meta from a batch meta to which it is attached.

Parameters
[in]batch_metaA pointer to the batch meta from which user_meta is to be removed.
[in]user_metaA pointer to the user meta to be removed from batch_meta.

returns acquired NvDsUserMeta pointer from user meta pool

void nvds_remove_user_meta_from_frame ( NvDsFrameMeta frame_meta,
NvDsUserMeta user_meta 
)

Removes a user meta from a frame meta to which it is attached.

Parameters
[in]frame_metaA pointer to the frame meta from which user_meta is to be removed.
[in]user_metaA pointer to the user meta to be removed from frame_meta.
void nvds_remove_user_meta_from_object ( NvDsObjectMeta obj_meta,
NvDsUserMeta user_meta 
)

Removes a user meta from an object meta to which it is attached.

Parameters
[in]obj_metaA pointer to the object meta from which user_meta is to be removed.
[in]user_metaA pointer to the user to be removed from obj_meta.
void nvds_remove_user_meta_from_roi ( NvDsRoiMeta obj_meta,
NvDsUserMeta user_meta 
)

Removes a user meta from an roi meta to which it is attached.

Parameters
[in]roi_metaA pointer to the roi meta from which user_meta is to be removed.
[in]user_metaA pointer to the user to be removed from roi_meta.