Tizen 2.3 - Native Application API

Camera: Controlling a Camera Device

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Contents

• Introduction to Tizen Camera API • Main Features • Camera State Changes

• Using Camera API • Initalizing the Camera • Taking a Photo

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Introduction to Tizen Camera API

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Main Features

• Offers basic camera features – preview and capture

• Main features of Camera API: • Preview images

• Supports various pixel formats – NV12, NV12T, NV16 … • Preview at frame rate • rotate/flip the preview

• Capture and save images • Control camera settings

• Contrast • Exposure • Brightness • Effects • ...

• Simultaneous use of multiple sensors(front/backside camera) is not allowed

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Camera State Changes

• Changes of Camera state(Camera lifecylce)

None Created

Previewing Capturing

Captured

camera_create()

camera_destroy()

camera_start_preview()

camera_stop_preview()

camera_start_preview()

camera_capture_start()

Automatic transition

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Using Camera API

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Initializing the Camera

Initializing the camera

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Initializing the Camera

• First, include the <camera.h> header file

• Create a structure for storing camera handle global data

• Example

• Create additional variables to specify if taking photos and auto-focusing are allowed

• Create a handle for the camera using the camera_create() function

Specifies the camera sensor (front/backside camera)

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Initializing the Camera

• The camera_create() function will return negative error value if it fails

• After creating a camera handle, camera_get_state() function will notify the current state of the camera

• If the state is not camera_state_created • Reinitialize the camera

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Initializing the Camera

• Use camera_attr_set_image_quality() to set image quality of the camera

• Set the display for showing preview images • Must be done before previewing

Supported value for quality: 1~100

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References

• Tizen Camera Guide - https://developer.tizen.org/ko/docu

mentation/guides/native-application

• Tizen Camera Tutorial - https://developer.tizen.org/ko/doc

umentation/tutorials/native-application/multimedia/camer

a

• Tizen Native API - https://developer.tizen.org/dev-guide/2

.3.0/org.tizen.native.mobile.apireference/group__CAPI__ME

DIA__CAMERA__MODULE.html#ga3ddd0982778fdfacd369

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