harmony 鸿蒙metadata_output.h
metadata_output.h
Overview
The metadata_output.h file declares the metadata output concepts.
Library: libohcamera.so
File to include: <ohcamera/metadata_output.h>
System capability: SystemCapability.Multimedia.Camera.Core
Since: 11
Related module: OH_Camera
Summary
Structs
| Name | Description |
|---|---|
| struct MetadataOutput_Callbacks | Describes the callbacks related to metadata output. |
Types
| Name | Description |
|---|---|
| typedef struct Camera_MetadataOutput Camera_MetadataOutput | Defines a struct for the metadata output object. |
| typedef void(* OH_MetadataOutput_OnMetadataObjectAvailable) (Camera_MetadataOutput *metadataOutput, Camera_MetadataObject *metadataObject, uint32_t size) | Defines the pointer to the callback defined in the MetadataOutput_Callbacks struct and used to report metadata output data. |
| typedef void(* OH_MetadataOutput_OnError) (Camera_MetadataOutput *metadataOutput, Camera_ErrorCode errorCode) | Defines the pointer to the callback defined in the MetadataOutput_Callbacks struct and used to report metadata output errors. |
| typedef struct MetadataOutput_Callbacks MetadataOutput_Callbacks | Defines a struct for the callback functions of metadata output. |
Functions
| Name | Description |
|---|---|
| Camera_ErrorCode OH_MetadataOutput_RegisterCallback (Camera_MetadataOutput *metadataOutput, MetadataOutput_Callbacks *callback) | Registers a callback to listen for metadata output events. |
| Camera_ErrorCode OH_MetadataOutput_UnregisterCallback (Camera_MetadataOutput *metadataOutput, MetadataOutput_Callbacks *callback) | Unregisters the callback used to listen for metadata output events. |
| Camera_ErrorCode OH_MetadataOutput_Start (Camera_MetadataOutput *metadataOutput) | Starts metadata output. |
| Camera_ErrorCode OH_MetadataOutput_Stop (Camera_MetadataOutput *metadataOutput) | Stops metadata output. |
| Camera_ErrorCode OH_MetadataOutput_Release (Camera_MetadataOutput *metadataOutput) | Releases a MetadataOutput instance. |
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