# CAMERA_I2CContextSwitch*

## Syntax

  `#include <twl/camera.h>`
  `CAMERAResult CAMERA_I2CContextSwitch(CAMERASelect camera, CAMERAContext context);`
  `CAMERAResult CAMERA_I2CContextSwitchAsync(CAMERASelect camera, CAMERAContext context, CAMERACallback callback, void *arg);`

## Arguments

camera | Camera to change the context for (`CAMERA_SELECT_IN` or `CAMERA_SELECT_OUT`).
context | Context to change.
callback | Function that is called when asynchronous processing has completed.
arg | Arguments when the callback function is invoked.

## Return Values

Returns `CAMERA_RESULT_SUCCESS` if changes were possible.

## Description

Switches the camera settings context. It is faster to switch the context than to configure settings individually.
When you switch the settings for the specified camera and the specified context (A or B), you cannot set camera to `CAMERA_SELECT_NONE` or context to `CAMERA_CONTEXT_BOTH`.
Unlike `CAMERA_I2CContextSwitch`, the `CAMERA_I2CContextSwitchAsync` function returns control immediately and runs asynchronously. Use callback to confirm that processing has completed.
Note:
If camera settings are changed using any of the `CAMERA_I2C*` functions, the changes may be delayed for approximately one frame before they are applied. Consequently, note that if camera settings are changed while capturing, the application may not be able to get an updated image (an image with changes applied) at the time the application intended.

## See Also

`CAMERASelect`
`CAMERAContext`
`CAMERACallback`
`CAMERAResult`

## Revision History

2009/03/25 Added a note on changes to camera settings during capture operations.
2007/10/12 Initial version.

CONFIDENTIAL