CAMERA_I2CAutoWhiteBalance*

Syntax

#include <twl/camera.h>

CAMERAResult CAMERA_I2CAutoWhiteBalance(CAMERASelect camera, BOOL on);
CAMERAResult CAMERA_I2CAutoWhiteBalanceAsync(CAMERASelect camera, BOOL on, CAMERACallback callback, void *arg);

Arguments

camera Camera to configure (CAMERA_SELECT_IN, CAMERA_SELECT_OUT, or CAMERA_SELECT_BOTH).
on If TRUE, the auto-adjustment feature is enabled. If FALSE, it is disabled.
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 configuration was successful.

Description

Enables or disables the auto-adjustment feature for the camera's white balance when it is set to "auto" with CAMERA_WHITE_BALANCE_NORMAL. The exposure value is unstable immediately after the camera is started with the CAMERA_I2CActivate function. A value of INVALID_COMMAND is returned if CAMERA_WHITE_BALANCE_NORMAL is not set. Calling the CAMERA_I2CWhiteBalance function resets the value set by this function and enables the auto-adjustment feature.

Unlike CAMERA_I2CAutoWhiteBalance, the CAMERA_I2CAutoWhiteBalanceAsync 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
CAMERACallback
CAMERAResult

Revision History

2009/03/25 Added a note on changes to camera settings during capture operations.
2008/10/30 Noted that CAMERA_SELECT_BOTH can also be specified.
2008/08/22 Initial version.


CONFIDENTIAL