#include <twl/camera.h>CAMERAResult CAMERA_I2CSize(CAMERASelect camera, CAMERASize size); CAMERAResult CAMERA_I2CSizeAsync(CAMERASelect camera, CAMERASize size, CAMERACallback callback, void *arg); CAMERAResult CAMERA_I2CSizeEx(CAMERASelect camera, CAMERAContext context, CAMERASize size); CAMERAResult CAMERA_I2CSizeExAsync(CAMERASelect camera, CAMERAContext context, CAMERASize size, CAMERACallback callback, void *arg);
| camera | Camera to configure (CAMERA_SELECT_IN, CAMERA_SELECT_OUT, or CAMERA_SELECT_BOTH). |
| context | Context to change. |
| size | Camera resolution. |
| callback | Function that is called when asynchronous processing has completed. |
| arg | Arguments when the callback function is invoked. |
Returns CAMERA_RESULT_SUCCESS if configuration was successful.
Changes the camera resolution.
The CAMERA_I2CSizeEx function changes the setting with a specified context. The non-Ex functions change the setting for both context A and B. See CAMERAContext for information on contexts.
Unlike CAMERA_I2CSize, the CAMERA_I2CSizeAsync function returns control immediately and runs asynchronously. Use callback to confirm that processing has completed.
Do not set CAMERA_SIZE_VGA or CAMERA_SIZE_DS_LCDx4 in any of these functions while either CAMERA_FRAME_RATE_30_TO_10, CAMERA_FRAME_RATE_30_TO_5, or CAMERA_FRAME_RATE_30 is specified with the CAMERA_I2CFrameRate* functions. Capture data becomes impossible to receive if these settings are made at the same time.
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. If camera settings are changed during image capture, therefore, an application's timing may make it impossible to get an image with the changes applied.
Occasional Shifting of Captured Images
The captured image may shift if this function is called during image capture.
Before calling this function, first stop the image capture with CAMERA_StopCapture. Then call this function. After this function completes execution, restart the image capture with CAMERA_StartCapture.
CAMERASelect
CAMERAContext
CAMERASize
CAMERACallback
CAMERAResult
2009/11/11 Explained occasional shifting of captured images.
2009/07/03 Updated information about conditions of use.
2009/03/25 Added information about changing camera settings during capture operations.
2008/10/30 Added that CAMERA_SELECT_BOTH can also be specified.
2008/1/23 Added a description that 30 fps capture is impossible at VGA resolution.
2007/10/12 Initial version.
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