i.MX ProcessorsのトピックRe: Camera Zoom

Camera Zoom

karanbhagoji — Mon, 08 Aug 2016 18:10:21 GMT

Hello all,

Having a problem with the Camera. I am using the sabresd board(mx6) with android lollipop , freescale release with kernel 3.10.53.

With the problem about the Camera, we are looking into the camera zoom feature, I would like to implement the digital zoom on this version and my product , is there any piece of code or implementation already done?. I am using the ov5640 mipi camera . If not kindly guide us to implement the same.

At android Hal layer we are using libcamera2 libaries.

Thanking you

Regards,

Karan

Re: Camera Zoom

igorpadykov — Tue, 09 Aug 2016 00:10:34 GMT

Hi Karan

please check examples on

https://community.freescale.com/docs/DOC-93822

OV5640 Auto Focus Drivers

Best regards

igor

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Re: Camera Zoom

karanbhagoji — Thu, 18 Aug 2016 03:49:26 GMT

Hello Igor ,

I have checked the above , but when trying to implement the same I came across the some codes where I observe that the zoom feature is enables as in the files ,

/frameworks/av/services/camera/libcameraservice/api1/client2/Parameters.cpp

Further more when trying to find the cause of the failure, we followed the logcat and came across the snippet in the file,

frameworks/base/core/java/android/hardware/camera2/legacy/LegacyRequestMapper.java as

	// Add all non-zero weight regions to the list
	List<MeteringRectangle> meteringRectangleList = new ArrayList<>();
	for (MeteringRectangle rect : meteringRegions) {
	if (rect.getMeteringWeight() != MeteringRectangle.METERING_WEIGHT_DONT_CARE) {
	meteringRectangleList.add(rect);
	}
	}
	if (meteringRectangleList.size() == 0) {
	Log.w(TAG, "Only received metering rectangles with weight 0.");
	return Arrays.asList(ParameterUtils.CAMERA_AREA_DEFAULT);
	}
	// Ignore any regions beyond our maximum supported count
	int countMeteringAreas =
	Math.min(maxNumMeteringAreas, meteringRectangleList.size());
	List<Camera.Area> meteringAreaList = new ArrayList<>(countMeteringAreas);

	for (int i = 0; i < countMeteringAreas; ++i) {
	MeteringRectangle rect = meteringRectangleList.get(i);
	ParameterUtils.MeteringData meteringData =
	ParameterUtils.convertMeteringRectangleToLegacy(activeArray, rect, zoomData);
	meteringAreaList.add(meteringData.meteringArea);
	}

Based on this I believe that to enable the zoom feature on the camera the measuring (weighted sum ) of the AWB has to be calculated . From the above code the log is seen Only received metering rectangles with weight 0. and the it is exiting , without setting the metering area for the zoom , and zoom feature.Is it possible to get around this error Can you guide me through this ?

Regards,

Karan