preview_output.h
Overview
The preview_output.h file declares the preview output concepts.
Library: libohcamera.so
System capability: SystemCapability.Multimedia.Camera.Core
Since: 11
Related module: OH_Camera
Summary
Structs
| Name | Description |
|---|---|
| PreviewOutput_Callbacks | Defines the callbacks used for preview output. |
Types
| Name | Description |
|---|---|
| Camera_PreviewOutput | Defines the preview output object. |
| (*OH_PreviewOutput_OnFrameStart) (Camera_PreviewOutput *previewOutput) | Defines the pointer to the callback defined in the PreviewOutput_Callbacks struct and used to report preview output frame start events. |
| (*OH_PreviewOutput_OnFrameEnd) (Camera_PreviewOutput *previewOutput, int32_t frameCount) | Defines the pointer to the callback defined in the PreviewOutput_Callbacks struct and used to report preview output frame end events. |
| (*OH_PreviewOutput_OnError) (Camera_PreviewOutput *previewOutput, Camera_ErrorCode errorCode) | Defines the pointer to the callback defined in the PreviewOutput_Callbacks struct and used to report preview output errors. |
| PreviewOutput_Callbacks | Defines the callbacks used for preview output. |
Functions
| Name | Description |
|---|---|
| OH_PreviewOutput_RegisterCallback (Camera_PreviewOutput *previewOutput, PreviewOutput_Callbacks *callback) | Registers a callback to listen for preview output events. |
| OH_PreviewOutput_UnregisterCallback (Camera_PreviewOutput *previewOutput, PreviewOutput_Callbacks *callback) | Unregisters the callback used to listen for preview output events. |
| OH_PreviewOutput_Start (Camera_PreviewOutput *previewOutput) | Starts preview output. |
| OH_PreviewOutput_Stop (Camera_PreviewOutput *previewOutput) | Stops preview output. |
| OH_PreviewOutput_Release (Camera_PreviewOutput *previewOutput) | Releases a PreviewOutput instance. |