camera_get_supported_manual_white_balance_rb_gain()

Retrieve the supported manual white balance red/blue gain values

Synopsis:

#include <camera/camera_3a.h>

camera_error_t camera_get_supported_manual_white_balance_rb_gain(camera_handle_t handle,
                                                                 unsigned numasked,
                                                                 unsigned *numsupported,
                                                                 unsigned *gainvalues,
                                                                 bool *maxmin)

Arguments:

handle: The handle returned by a call to the camera_open() function.
numasked: The requested number of white balance red/blue gain values to return in the gainvalues array. You can specify a value of zero to determine the number of supported white balance red/blue gain values.
numsupported: A pointer to an integer that will be updated with the number of supported white balance red/blue gain values.
gainvalues: A pointer to an unsigned array that will be updated with the manual white balance red/blue gain values that are supported. Ensure that you allocate an array with numasked elements. For details about the meaning of the values returned in this array, see the maxmin description.
maxmin: A pointer to a bool that will specify how to interpret the gainvalues argument. This argument will be true if the first of two values returned in the array is to be interpreted as the maximum supported white balance red/blue gain value and the second as the minimum supported value. It will be false if the values are to be interpreted as the discrete white balance red/blue gain values that are supported.

Library:

libcamapi

Description:

Use this function to retrieve the set of supported manual white balance red/blue gain values for the camera.

Ensure that the gainvalues argument points to an array which has at least numasked elements allocated. To determine an appropriate size for this array, you can invoke this function in presizing mode by setting the numasked argument to 0 or the gainvalues argument to NULL. The function then returns, in the numsupported argument, the maximum array size required. You can then allocate an array of this size and invoke the function again with numasked set to that previous numsupported value.

The values that you retrieve using this function can be set using the camera_set_manual_white_balance_rb_gain().

Returns:

CAMERA_EOK when the function successfully completes, otherwise another camera_error_t value that provides the reason that the call failed.

Page updated: March 12, 2026