Examples with Camera android.hardware.Camera used on opensource projects

Example 26 with Camera

use of android.hardware.Camera in project platform_frameworks_base by android.

the class LegacyFaceDetectMapper method mapResultFaces.

/**
     * Update the {@code result} camera metadata map with the new value for the
     * {@code statistics.faces} and {@code statistics.faceDetectMode}.
     *
     * <p>Face detect callbacks are processed in the background, and each call to
     * {@link #mapResultFaces} will have the latest faces as reflected by the camera1 callbacks.</p>
     *
     * <p>If the scene mode was set to {@code FACE_PRIORITY} but face detection is disabled,
     * the camera will still run face detection in the background, but no faces will be reported
     * in the capture result.</p>
     *
     * @param result a non-{@code null} result
     * @param legacyRequest a non-{@code null} request (read-only)
     */
public void mapResultFaces(CameraMetadataNative result, LegacyRequest legacyRequest) {
    checkNotNull(result, "result must not be null");
    checkNotNull(legacyRequest, "legacyRequest must not be null");
    Camera.Face[] faces, previousFaces;
    int fdMode;
    boolean fdScenePriority;
    synchronized (mLock) {
        fdMode = mFaceDetectReporting ? STATISTICS_FACE_DETECT_MODE_SIMPLE : STATISTICS_FACE_DETECT_MODE_OFF;
        if (mFaceDetectReporting) {
            faces = mFaces;
        } else {
            faces = null;
        }
        fdScenePriority = mFaceDetectScenePriority;
        previousFaces = mFacesPrev;
        mFacesPrev = faces;
    }
    CameraCharacteristics characteristics = legacyRequest.characteristics;
    CaptureRequest request = legacyRequest.captureRequest;
    Size previewSize = legacyRequest.previewSize;
    Camera.Parameters params = legacyRequest.parameters;
    Rect activeArray = characteristics.get(CameraCharacteristics.SENSOR_INFO_ACTIVE_ARRAY_SIZE);
    ZoomData zoomData = ParameterUtils.convertScalerCropRegion(activeArray, request.get(CaptureRequest.SCALER_CROP_REGION), previewSize, params);
    List<Face> convertedFaces = new ArrayList<>();
    if (faces != null) {
        for (Camera.Face face : faces) {
            if (face != null) {
                convertedFaces.add(ParameterUtils.convertFaceFromLegacy(face, activeArray, zoomData));
            } else {
                Log.w(TAG, "mapResultFaces - read NULL face from camera1 device");
            }
        }
    }
    if (DEBUG && previousFaces != faces) {
        // Log only in verbose and IF the faces changed
        Log.v(TAG, "mapResultFaces - changed to " + ListUtils.listToString(convertedFaces));
    }
    result.set(CaptureResult.STATISTICS_FACES, convertedFaces.toArray(new Face[0]));
    result.set(CaptureResult.STATISTICS_FACE_DETECT_MODE, fdMode);
    // Override scene mode with FACE_PRIORITY if the request was using FACE_PRIORITY
    if (fdScenePriority) {
        result.set(CaptureResult.CONTROL_SCENE_MODE, CONTROL_SCENE_MODE_FACE_PRIORITY);
    }
}

Example 27 with Camera

use of android.hardware.Camera in project QrcodeScanner by xiaofan-android.

the class CameraPreview method releaseCamera.

public void releaseCamera() {
    mMainHandler.removeCallbacks(mWaitRunnable);
    mAutoFocusHandler.removeCallbacks(mDoAutoFocus);
    if (mCamera != null) {
        // 解决Camera在释放过程中发生预览回调的问题
        Camera camera = mCamera;
        mCamera = null;
        camera.release();
    }
    if (mPreviewThread != null && mPreviewThread.isAlive()) {
        mPreviewThread.quit();
        mPreviewThread = null;
    }
}

Example 28 with Camera

use of android.hardware.Camera in project android-zxing by PearceXu.

the class CameraConfigurationManager method initFromCameraParameters.

/**
 * Reads, one time, values from the camera that are needed by the app.
 */
void initFromCameraParameters(OpenCamera camera) {
    Camera.Parameters parameters = camera.getCamera().getParameters();
    WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    Display display = manager.getDefaultDisplay();
    int displayRotation = display.getRotation();
    int cwRotationFromNaturalToDisplay;
    switch(displayRotation) {
        case Surface.ROTATION_0:
            cwRotationFromNaturalToDisplay = 0;
            break;
        case Surface.ROTATION_90:
            cwRotationFromNaturalToDisplay = 90;
            break;
        case Surface.ROTATION_180:
            cwRotationFromNaturalToDisplay = 180;
            break;
        case Surface.ROTATION_270:
            cwRotationFromNaturalToDisplay = 270;
            break;
        default:
            // Have seen this return incorrect values like -90
            if (displayRotation % 90 == 0) {
                cwRotationFromNaturalToDisplay = (360 + displayRotation) % 360;
            } else {
                throw new IllegalArgumentException("Bad rotation: " + displayRotation);
            }
    }
    Log.i(TAG, "Display at: " + cwRotationFromNaturalToDisplay);
    int cwRotationFromNaturalToCamera = camera.getOrientation();
    Log.i(TAG, "Camera at: " + cwRotationFromNaturalToCamera);
    // Still not 100% sure about this. But acts like we need to flip this:
    if (camera.getFacing() == CameraFacing.FRONT) {
        cwRotationFromNaturalToCamera = (360 - cwRotationFromNaturalToCamera) % 360;
        Log.i(TAG, "Front camera overriden to: " + cwRotationFromNaturalToCamera);
    }
    /*
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    String overrideRotationString;
    if (camera.getFacing() == CameraFacing.FRONT) {
      overrideRotationString = prefs.getString(PreferencesActivity.KEY_FORCE_CAMERA_ORIENTATION_FRONT, null);
    } else {
      overrideRotationString = prefs.getString(PreferencesActivity.KEY_FORCE_CAMERA_ORIENTATION, null);
    }
    if (overrideRotationString != null && !"-".equals(overrideRotationString)) {
      Log.i(TAG, "Overriding camera manually to " + overrideRotationString);
      cwRotationFromNaturalToCamera = Integer.parseInt(overrideRotationString);
    }
     */
    cwRotationFromDisplayToCamera = (360 + cwRotationFromNaturalToCamera - cwRotationFromNaturalToDisplay) % 360;
    Log.i(TAG, "Final display orientation: " + cwRotationFromDisplayToCamera);
    if (camera.getFacing() == CameraFacing.FRONT) {
        Log.i(TAG, "Compensating rotation for front camera");
        cwNeededRotation = (360 - cwRotationFromDisplayToCamera) % 360;
    } else {
        cwNeededRotation = cwRotationFromDisplayToCamera;
    }
    Log.i(TAG, "Clockwise rotation from display to camera: " + cwNeededRotation);
    Point theScreenResolution = new Point();
    display.getSize(theScreenResolution);
    screenResolution = theScreenResolution;
    Log.i(TAG, "Screen resolution in current orientation: " + screenResolution);
    cameraResolution = CameraConfigurationUtils.findBestPreviewSizeValue(parameters, screenResolution);
    Log.i(TAG, "Camera resolution: " + cameraResolution);
    bestPreviewSize = CameraConfigurationUtils.findBestPreviewSizeValue(parameters, screenResolution);
    Log.i(TAG, "Best available preview size: " + bestPreviewSize);
    boolean isScreenPortrait = screenResolution.x < screenResolution.y;
    boolean isPreviewSizePortrait = bestPreviewSize.x < bestPreviewSize.y;
    if (isScreenPortrait == isPreviewSizePortrait) {
        previewSizeOnScreen = bestPreviewSize;
    } else {
        previewSizeOnScreen = new Point(bestPreviewSize.y, bestPreviewSize.x);
    }
    Log.i(TAG, "Preview size on screen: " + previewSizeOnScreen);
}

Example 29 with Camera

use of android.hardware.Camera in project android-zxing by PearceXu.

the class CameraManager method openDriver.

/**
 * Opens the camera driver and initializes the hardware parameters.
 *
 * @param holder The surface object which the camera will draw preview frames into.
 * @throws IOException Indicates the camera driver failed to open.
 */
public synchronized void openDriver(SurfaceHolder holder) throws IOException {
    OpenCamera theCamera = camera;
    if (theCamera == null) {
        theCamera = OpenCameraInterface.open(requestedCameraId);
        if (theCamera == null) {
            throw new IOException("Camera.open() failed to return object from driver");
        }
        camera = theCamera;
    }
    if (!initialized) {
        initialized = true;
        configManager.initFromCameraParameters(theCamera);
        if (requestedFramingRectWidth > 0 && requestedFramingRectHeight > 0) {
            setManualFramingRect(requestedFramingRectWidth, requestedFramingRectHeight);
            requestedFramingRectWidth = 0;
            requestedFramingRectHeight = 0;
        }
    }
    Camera cameraObject = theCamera.getCamera();
    Camera.Parameters parameters = cameraObject.getParameters();
    // Save these, temporarily
    String parametersFlattened = parameters == null ? null : parameters.flatten();
    try {
        configManager.setDesiredCameraParameters(theCamera, false);
    } catch (RuntimeException re) {
        // Driver failed
        Log.w(TAG, "Camera rejected parameters. Setting only minimal safe-mode parameters");
        Log.i(TAG, "Resetting to saved camera params: " + parametersFlattened);
        // Reset:
        if (parametersFlattened != null) {
            parameters = cameraObject.getParameters();
            parameters.unflatten(parametersFlattened);
            try {
                cameraObject.setParameters(parameters);
                configManager.setDesiredCameraParameters(theCamera, true);
            } catch (RuntimeException re2) {
                // Well, darn. Give up
                Log.w(TAG, "Camera rejected even safe-mode parameters! No configuration");
            }
        }
    }
    cameraObject.setPreviewDisplay(holder);
}

Example 30 with Camera

use of android.hardware.Camera in project collect by opendatakit.

the class CameraUtils method getCameraInstance.

public static Camera getCameraInstance(Activity activity, int cameraId) {
    Camera camera = Camera.open(cameraId);
    camera.setDisplayOrientation(90);
    // Set the rotation of the camera which the output picture need.
    Camera.Parameters parameters = camera.getParameters();
    int rotation = getRotationInt(activity.getWindowManager().getDefaultDisplay().getRotation());
    parameters.setRotation(calcCameraRotation(cameraId, rotation));
    camera.setParameters(parameters);
    return camera;
}