예제 #1
0
  public static boolean isFlashSupported(Camera camera, Context context) {

    mPreferences = PreferenceManager.getDefaultSharedPreferences(context);
    if (camera != null) {
      Camera.Parameters mParameters = camera.getParameters();

      if (mParameters.getFlashMode() == null) {
        mPrefFlash = mPreferences.edit().putBoolean("mPrefFlash", false).commit();
        return false;
      }

      List<String> mSupportedFlashModes = mParameters.getSupportedFlashModes();
      if (mSupportedFlashModes == null
          || mSupportedFlashModes.isEmpty()
          || mSupportedFlashModes.size() == 1
              && mSupportedFlashModes.get(0).equals(Camera.Parameters.FLASH_MODE_OFF)) {
        mPrefFlash = mPreferences.edit().putBoolean("mPrefFlash", false).commit();
        return false;
      }
    } else {
      mPrefFlash = mPreferences.edit().putBoolean("mPrefFlash", false).commit();
      return false;
    }

    mPrefFlash = mPreferences.edit().putBoolean("mPrefFlash", true).commit();
    return true;
  }
예제 #2
0
 public void offLight() {
   if (camera != null) {
     Camera.Parameters parameter = camera.getParameters();
     parameter.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
     camera.setParameters(parameter);
   }
 }
 public static void setBestPreviewFPS(Camera.Parameters parameters, int minFPS, int maxFPS) {
   List<int[]> supportedPreviewFpsRanges = parameters.getSupportedPreviewFpsRange();
   Log.i(TAG, "Supported FPS ranges: " + toString(supportedPreviewFpsRanges));
   if (supportedPreviewFpsRanges != null && !supportedPreviewFpsRanges.isEmpty()) {
     int[] suitableFPSRange = null;
     for (int[] fpsRange : supportedPreviewFpsRanges) {
       int thisMin = fpsRange[Camera.Parameters.PREVIEW_FPS_MIN_INDEX];
       int thisMax = fpsRange[Camera.Parameters.PREVIEW_FPS_MAX_INDEX];
       if (thisMin >= minFPS * 1000 && thisMax <= maxFPS * 1000) {
         suitableFPSRange = fpsRange;
         break;
       }
     }
     if (suitableFPSRange == null) {
       Log.i(TAG, "No suitable FPS range?");
     } else {
       int[] currentFpsRange = new int[2];
       parameters.getPreviewFpsRange(currentFpsRange);
       if (Arrays.equals(currentFpsRange, suitableFPSRange)) {
         Log.i(TAG, "FPS range already set to " + Arrays.toString(suitableFPSRange));
       } else {
         Log.i(TAG, "Setting FPS range to " + Arrays.toString(suitableFPSRange));
         parameters.setPreviewFpsRange(
             suitableFPSRange[Camera.Parameters.PREVIEW_FPS_MIN_INDEX],
             suitableFPSRange[Camera.Parameters.PREVIEW_FPS_MAX_INDEX]);
       }
     }
   }
 }
예제 #4
0
 @Override
 public void setPreviewHeight(int mPreviewHeight) {
   this.mPreviewHeight = mPreviewHeight;
   Camera.Parameters parameters = mCamera.getParameters();
   // 设置预览照片的大小
   parameters.setPreviewSize(mPreviewWidth, mPreviewHeight);
 }
  @Override
  public void onPreviewFrame(byte[] data, Camera camera) {
    Camera.Parameters params = camera.getParameters();
    int w = params.getPreviewSize().width;
    int h = params.getPreviewSize().height;
    int format = params.getPreviewFormat();

    ByteArrayOutputStream out = new ByteArrayOutputStream();
    YuvImage image = new YuvImage(data, format, w, h, null);
    Rect area = new Rect(0, 0, w, h);

    long start = System.currentTimeMillis();
    image.compressToJpeg(area, imageQuality, out);
    long end = System.currentTimeMillis();

    long pingTime = ServerConnector.getInstance().getPingTime() + (end - start);
    if (pingTime > 50 && imageQuality > 25) {
      imageQuality--;
    } else if (pingTime < 50 && imageQuality < 100) {
      imageQuality++;
    }

    Log.i("image", "" + imageQuality);

    ServerConnector.getInstance().pushImage(out.toByteArray());
  }
예제 #6
0
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Hide the window title.
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
    getWindow().setFormat(PixelFormat.UNKNOWN);
    setContentView(R.layout.main);

    // Create an instance of Camera
    mCamera = getCameraInstance();
    Camera.Parameters mParameters = mCamera.getParameters();
    mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
    // mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_ON);
    mCamera.setParameters(mParameters);

    // Create our Preview view and set it as the content of our activity.
    mPreview = new Preview(this, mCamera);
    FrameLayout preview = (FrameLayout) findViewById(R.id.preview);
    preview.addView(mPreview);

    // Create our Overlay
    mOverlay = new Overlay(this);
    preview.addView(mOverlay);
    mPreview.setOverlay(mOverlay);

    // Setting buttons
    buttonProc = (Button) findViewById(R.id.buttonProc);
    buttonBinImage = (Button) findViewById(R.id.buttonBinaryImage);
    buttonReset = (Button) findViewById(R.id.buttonReset);
    buttonProc.setOnClickListener(snapAndProcess());
    buttonBinImage.setOnClickListener(switchBinaryImage());
    buttonReset.setOnClickListener(reset());
  }
  public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
    Log.e(TAG, "surfaceChanged => w=" + w + ", h=" + h);
    // If your preview can change or rotate, take care of those events here.
    // Make sure to stop the preview before resizing or reformatting it.
    if (mHolder.getSurface() == null) {
      // preview surface does not exist
      return;
    }

    // stop preview before making changes
    try {
      mCamera.stopPreview();
    } catch (Exception e) {
      // ignore: tried to stop a non-existent preview
    }

    // set preview size and make any resize, rotate or reformatting changes here
    // start preview with new settings
    try {
      Camera.Parameters parameters = mCamera.getParameters();

      /* INSERT ZOOM HERE */

      parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
      parameters.setRotation(90);
      mCamera.setParameters(parameters);
      mCamera.setDisplayOrientation(90);

      mCamera.setPreviewDisplay(mHolder);
      mCamera.startPreview();

    } catch (Exception e) {
      Log.d(TAG, "Error starting camera preview: " + e.getMessage());
    }
  }
  private void setPreviewCallback() {
    if (mCamera == null) {
      android.util.Log.e("MOSYNC INTERNAL", "No Preview set");
      return;
    }

    try {
      // We have to use and static instance of the camera in the reflection here
      mSetPreviewCallbackWithBuffer =
          mCamera
              .getClass()
              .getMethod("setPreviewCallbackWithBuffer", Camera.PreviewCallback.class);

      Camera.Parameters parameters = getCurrentParameters();
      Camera.Size size = parameters.getPreviewSize();

      mCallbackBuffer = new byte[size.width * size.height * 4];

      mCamera.addCallbackBuffer(mCallbackBuffer);

      mIsUsingPreviewCallbackBuffer = true;

      mCamera.setPreviewCallbackWithBuffer(previewCallback);

    } catch (NoSuchMethodException nsme) {
      mIsUsingPreviewCallbackBuffer = false;

      mCamera.setPreviewCallback(previewCallback);
    }
  }
예제 #9
0
  @Override
  public void surfaceCreated(SurfaceHolder holder) {
    try {
      // open the camera
      camera = Camera.open(1);
    } catch (RuntimeException e) {
      // check for exceptions
      System.err.println(e);
      return;
    }
    Camera.Parameters param;
    param = camera.getParameters();

    // modify parameter
    param.setPreviewSize(352, 288);
    camera.setParameters(param);
    try {
      // The Surface has been created, now tell the camera where to draw
      // the preview.
      camera.setPreviewDisplay(surfaceHolder);
      camera.setDisplayOrientation(90);
      camera.startPreview();
    } catch (Exception e) {
      // check for exceptions
      System.err.println(e);
      return;
    }
  }
예제 #10
0
  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

    if (mHolder.getSurface() == null) {
      // preview surface does not exist
      return;
    }

    // stop preview before making changes
    try {
      mCamera.stopPreview();
    } catch (Exception e) {
      // ignore: tried to stop a non-existent preview
    }

    // Sets preview size.
    Camera.Parameters parameters = mCamera.getParameters();
    List<Camera.Size> sizes = parameters.getSupportedPreviewSizes();
    Camera.Size cs = sizes.get(0);
    parameters.setPreviewSize(cs.width, cs.height);
    mCamera.setParameters(parameters);

    // start preview with new settings
    try {
      mCamera.setPreviewDisplay(mHolder);
      mCamera.startPreview();

    } catch (Exception e) {
      Log.d(TAG, "Error starting camera preview: " + e.getMessage());
    }
    Log.e(TAG, "SurfaceChanged.");
  }
예제 #11
0
  private void doSetTorch(Camera.Parameters parameters, boolean newSetting, boolean safeMode) {
    String flashMode;
    if (newSetting) {
      flashMode =
          findSettableValue(
              parameters.getSupportedFlashModes(),
              Camera.Parameters.FLASH_MODE_TORCH,
              Camera.Parameters.FLASH_MODE_ON);
    } else {
      flashMode =
          findSettableValue(parameters.getSupportedFlashModes(), Camera.Parameters.FLASH_MODE_OFF);
    }
    if (flashMode != null) {
      parameters.setFlashMode(flashMode);
    }

    /*
     * SharedPreferences prefs =
     * PreferenceManager.getDefaultSharedPreferences(context); if
     * (!prefs.getBoolean(PreferencesActivity.KEY_DISABLE_EXPOSURE, false))
     * { if (!safeMode) { int minExposure =
     * parameters.getMinExposureCompensation(); int maxExposure =
     * parameters.getMaxExposureCompensation(); if (minExposure != 0 ||
     * maxExposure != 0) { float step =
     * parameters.getExposureCompensationStep(); int desiredCompensation; if
     * (newSetting) { // Light on; set low exposue compensation
     * desiredCompensation = Math.max((int) (MIN_EXPOSURE_COMPENSATION /
     * step), minExposure); } else { // Light off; set high compensation
     * desiredCompensation = Math.min((int) (MAX_EXPOSURE_COMPENSATION /
     * step), maxExposure); } Log.i(TAG, "Setting exposure compensation to "
     * + desiredCompensation + " / " + (step * desiredCompensation));
     * parameters.setExposureCompensation(desiredCompensation); } else {
     * Log.i(TAG, "Camera does not support exposure compensation"); } } }
     */
  }
예제 #12
0
  /**
   * Attempts to find a preview size that matches the provided width and height (which specify the
   * dimensions of the encoded video). If it fails to find a match it just uses the default preview
   * size.
   *
   * <p>TODO: should do a best-fit match.
   */
  private static void choosePreviewSize(Camera.Parameters parms, int width, int height) {
    // We should make sure that the requested MPEG size is less than the preferred
    // size, and has the same aspect ratio.
    Camera.Size ppsfv = parms.getPreferredPreviewSizeForVideo();
    if (ppsfv != null) {
      Log.d(TAG, "Camera preferred preview size for video is " + ppsfv.width + "x" + ppsfv.height);
    }

    // for (Camera.Size size : parms.getSupportedPreviewSizes()) {
    //    Log.d(TAG, "supported: " + size.width + "x" + size.height);
    // }

    for (Camera.Size size : parms.getSupportedPreviewSizes()) {
      if (size.width == width && size.height == height) {
        parms.setPreviewSize(width, height);
        return;
      }
    }

    Log.w(TAG, "Unable to set preview size to " + width + "x" + height);
    if (ppsfv != null) {
      parms.setPreviewSize(ppsfv.width, ppsfv.height);
    }
    // else use whatever the default size is
  }
예제 #13
0
 // Constructor
 public AudioSynth(
     final Camera camera,
     AudioTrack redSynthesizer,
     AudioTrack greenSynthesizer,
     AudioTrack blueSynthesizer) {
   mFinished = false;
   mRGBData = null;
   mRedSynthesizer = redSynthesizer;
   mGreenSynthesizer = greenSynthesizer;
   mBlueSynthesizer = blueSynthesizer;
   redGeneratedSnd = new short[maxSamples];
   greenGeneratedSnd = new short[maxSamples];
   blueGeneratedSnd = new short[maxSamples];
   mRedHistogram = new int[256];
   mGreenHistogram = new int[256];
   mBlueHistogram = new int[256];
   mBinSquared = new double[256];
   for (int bin = 0; bin < 256; bin++) {
     mBinSquared[bin] = ((double) bin) * bin;
   }
   Camera.Parameters params = camera.getParameters();
   mImageWidth = params.getPreviewSize().width;
   mImageHeight = params.getPreviewSize().height;
   int yStride = (int) Math.ceil(mImageWidth / 16.0) * 16;
   int uvStride = (int) Math.ceil((yStride / 2) / 16.0) * 16;
   int ySize = yStride * mImageHeight;
   int uvSize = uvStride * mImageHeight / 2;
   final int size = ySize + uvSize * 2;
   mYUVBuffer = new byte[size];
   camera.addCallbackBuffer(mYUVBuffer);
   mRGBData = new int[mImageWidth * mImageHeight];
 }
예제 #14
0
 public void setupCameraParameters() {
   Camera.Size optimalSize = getOptimalPreviewSize();
   Camera.Parameters parameters = mCamera.getParameters();
   parameters.setPreviewSize(optimalSize.width, optimalSize.height);
   mCamera.setParameters(parameters);
   adjustViewSize(optimalSize);
 }
예제 #15
0
  // Called when holder has changed
  public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {

    Camera.Parameters parameters = camera.getParameters();
    List<String> focusModes = parameters.getSupportedFocusModes();
    if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
      Log.d("camera", "focus_mode_auto");
      parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
    } else {
      Log.d("camera", "focus_mode_macro");
      parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_MACRO);
    }
    Log.d("camera", "orientation: " + getResources().getConfiguration().orientation);
    int orientation = getResources().getConfiguration().orientation;
    switch (orientation) {
      case Surface.ROTATION_0:
        Log.d("camera", "ROTATION_0");
        camera.setDisplayOrientation(180);
        break;
      case Surface.ROTATION_90:
        Log.d("camera", "ROTATION_90");
        camera.setDisplayOrientation(90);
        break;
      case Surface.ROTATION_180:
        Log.d("camera", "ROTATION_180");
        camera.setDisplayOrientation(0);
        break;
      case Surface.ROTATION_270:
        Log.d("camera", "ROTATION_270");
        camera.setDisplayOrientation(270);
        break;
    }

    camera.setParameters(parameters);
    camera.startPreview();
  }
  /** Reads, one time, values from the camera that are needed by the app. */
  void initFromCameraParameters(Camera camera) {

    Camera.Parameters parameters = camera.getParameters();
    previewFormat = parameters.getPreviewFormat();
    previewFormatString = parameters.get("preview-format");
    Log.d(TAG, "Default preview format: " + previewFormat + '/' + previewFormatString);
    WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    Display display = manager.getDefaultDisplay();
    screenResolution = new Point(display.getWidth(), display.getHeight());
    Log.d(TAG, "Screen resolution: " + screenResolution);

    // ���һЩ�ֻ��޷�ɨ���BUG����������i9228��i9220.
    Point screenResolutionForCamera = new Point();
    screenResolutionForCamera.x = screenResolution.x;
    screenResolutionForCamera.y = screenResolution.y;
    // preview size is always something like 480*320, other 320*480
    if (screenResolution.x < screenResolution.y) {
      screenResolutionForCamera.x = screenResolution.y;
      screenResolutionForCamera.y = screenResolution.x;
    }

    cameraResolution = getCameraResolution(parameters, screenResolutionForCamera);
    // cameraResolution = getCameraResolution(parameters, screenResolution);
    Log.d(TAG, "Camera resolution: " + screenResolution);
  }
예제 #17
0
 public void onPreviewFrame(byte[] data, Camera camera) {
   Camera.Parameters parameters = camera.getParameters();
   width = parameters.getPreviewSize().width;
   height = parameters.getPreviewSize().height;
   yuvImage = new YuvImage(data, ImageFormat.NV21, width, height, null);
   looped += 1;
 }
예제 #18
0
  public void setCaptureQuality(int cameraType, String captureQuality) {
    Camera camera = _cameras.get(cameraType);
    if (camera == null) {
      return;
    }

    Camera.Parameters parameters = camera.getParameters();
    Camera.Size pictureSize = null;
    switch (captureQuality) {
      case RCTCameraModule.RCT_CAMERA_CAPTURE_QUALITY_LOW:
        pictureSize = getSmallestSize(parameters.getSupportedPictureSizes());
        break;
      case RCTCameraModule.RCT_CAMERA_CAPTURE_QUALITY_MEDIUM:
        List<Camera.Size> sizes = parameters.getSupportedPictureSizes();
        pictureSize = sizes.get(sizes.size() / 2);
        break;
      case RCTCameraModule.RCT_CAMERA_CAPTURE_QUALITY_HIGH:
        pictureSize =
            getBestSize(
                parameters.getSupportedPictureSizes(), Integer.MAX_VALUE, Integer.MAX_VALUE);
    }

    if (pictureSize != null) {
      parameters.setPictureSize(pictureSize.width, pictureSize.height);
      camera.setParameters(parameters);
    }
  }
  private static Point getCameraResolution(Camera.Parameters parameters, Point screenResolution) {

    String previewSizeValueString = parameters.get("preview-size-values");
    // saw this on Xperia
    if (previewSizeValueString == null) {
      previewSizeValueString = parameters.get("preview-size-value");
    }

    Point cameraResolution = null;

    if (CameraManager.mDesiredWidth == 0) CameraManager.mDesiredWidth = screenResolution.x;
    if (CameraManager.mDesiredHeight == 0) CameraManager.mDesiredHeight = screenResolution.y;

    List<Size> sizes = parameters.getSupportedPreviewSizes();

    int minDif = 99999;
    int minIndex = -1;

    for (int i = 0; i < sizes.size(); i++) {
      int dif =
          Math.abs(sizes.get(i).width - CameraManager.mDesiredWidth)
              + Math.abs(sizes.get(i).height - CameraManager.mDesiredHeight);
      if (dif < minDif) {
        minDif = dif;
        minIndex = i;
      }
    }

    cameraResolution = new Point(sizes.get(minIndex).width, sizes.get(minIndex).height);

    // cameraResolution = findBestPreviewSizeValue(previewSizeValueString,
    // screenResolution);

    return cameraResolution;
  }
예제 #20
0
  public void setFlashMode(int cameraType, int flashMode) {
    Camera camera = _cameras.get(cameraType);
    if (null == camera) {
      return;
    }

    Camera.Parameters parameters = camera.getParameters();
    String value = parameters.getFlashMode();
    switch (flashMode) {
      case RCTCameraModule.RCT_CAMERA_FLASH_MODE_AUTO:
        value = Camera.Parameters.FLASH_MODE_AUTO;
        break;
      case RCTCameraModule.RCT_CAMERA_FLASH_MODE_ON:
        value = Camera.Parameters.FLASH_MODE_ON;
        break;
      case RCTCameraModule.RCT_CAMERA_FLASH_MODE_OFF:
        value = Camera.Parameters.FLASH_MODE_OFF;
        break;
    }
    List<String> flashModes = parameters.getSupportedFlashModes();
    if (flashModes != null && flashModes.contains(value)) {
      parameters.setFlashMode(value);
      camera.setParameters(parameters);
    }
  }
  private void checkRearCamera() {
    Camera camera = null;
    try {
      camera = Camera.open();
      if (camera != null) {
        assertAvailable(PackageManager.FEATURE_CAMERA);

        Camera.Parameters params = camera.getParameters();
        if (params.getSupportedFocusModes().contains(Parameters.FOCUS_MODE_AUTO)) {
          assertAvailable(PackageManager.FEATURE_CAMERA_AUTOFOCUS);
        } else {
          assertNotAvailable(PackageManager.FEATURE_CAMERA_AUTOFOCUS);
        }

        if (params.getFlashMode() != null) {
          assertAvailable(PackageManager.FEATURE_CAMERA_FLASH);
        } else {
          assertNotAvailable(PackageManager.FEATURE_CAMERA_FLASH);
        }
      } else {
        assertNotAvailable(PackageManager.FEATURE_CAMERA);
        assertNotAvailable(PackageManager.FEATURE_CAMERA_AUTOFOCUS);
        assertNotAvailable(PackageManager.FEATURE_CAMERA_FLASH);
      }
    } finally {
      if (camera != null) {
        camera.release();
      }
    }
  }
예제 #22
0
  public int doZoom(float scale) {
    synchronized (mCameraLock) {
      if (mCamera == null) {
        return 0;
      }
      int currentZoom = 0;
      int maxZoom;
      Camera.Parameters parameters = mCamera.getParameters();
      if (!parameters.isZoomSupported()) {
        Log.w(TAG, mContext.getString(R.string.zoom_not_supported));
        return currentZoom;
      }
      maxZoom = parameters.getMaxZoom();

      currentZoom = parameters.getZoom() + 1;
      float newZoom;
      if (scale > 1) {
        newZoom = currentZoom + scale * (maxZoom / 10);
      } else {
        newZoom = currentZoom * scale;
      }
      currentZoom = Math.round(newZoom) - 1;
      if (currentZoom < 0) {
        currentZoom = 0;
      } else if (currentZoom > maxZoom) {
        currentZoom = maxZoom;
      }
      parameters.setZoom(currentZoom);
      mCamera.setParameters(parameters);
      return currentZoom;
    }
  }
  private static Point getCameraResolution(Camera.Parameters parameters, Point screenResolution) {

    String previewSizeValueString = parameters.get("preview-size-values");
    // saw this on Xperia
    if (previewSizeValueString == null) {
      previewSizeValueString = parameters.get("preview-size-value");
    }

    Point cameraResolution = null;

    if (previewSizeValueString != null) {
      Log.d(TAG, "preview-size-values parameter: " + previewSizeValueString);
      Log.d(TAG, "preview-size-values parameter: " + previewSizeValueString);
      cameraResolution = findBestPreviewSizeValue(previewSizeValueString, screenResolution);
      //      cameraResolution = new Point(1280, 720);
      Log.d(TAG, "BestPreviewSizeValue: " + cameraResolution);
    }

    if (cameraResolution == null) {
      // Ensure that the camera resolution is a multiple of 8, as the screen may not be.
      cameraResolution = new Point((screenResolution.x >> 3) << 3, (screenResolution.y >> 3) << 3);
    }

    return cameraResolution;
  }
예제 #24
0
  /**
   * Generates a list of acceptable preview sizes. Preview sizes are not acceptable if there is not
   * a corresponding picture size of the same aspect ratio. If there is a corresponding picture size
   * of the same aspect ratio, the picture size is paired up with the preview size.
   *
   * <p>This is necessary because even if we don't use still pictures, the still picture size must
   * be set to a size that is the same aspect ratio as the preview size we choose. Otherwise, the
   * preview images may be distorted on some devices.
   */
  private static List<SizePair> generateValidPreviewSizeList(Camera camera, Context context) {
    Camera.Parameters parameters = camera.getParameters();
    List<Camera.Size> supportedPreviewSizes = parameters.getSupportedPreviewSizes();
    List<Camera.Size> supportedPictureSizes = parameters.getSupportedPictureSizes();
    List<SizePair> validPreviewSizes = new ArrayList<>();
    for (Camera.Size previewSize : supportedPreviewSizes) {
      float previewAspectRatio = (float) previewSize.width / (float) previewSize.height;

      // By looping through the picture sizes in order, we favor the higher resolutions.
      // We choose the highest resolution in order to support taking the full resolution
      // picture later.
      for (Camera.Size pictureSize : supportedPictureSizes) {
        float pictureAspectRatio = (float) pictureSize.width / (float) pictureSize.height;
        if (Math.abs(previewAspectRatio - pictureAspectRatio) < ASPECT_RATIO_TOLERANCE) {
          validPreviewSizes.add(new SizePair(previewSize, pictureSize));
          break;
        }
      }
    }

    // If there are no picture sizes with the same aspect ratio as any preview sizes, allow all
    // of the preview sizes and hope that the camera can handle it.  Probably unlikely, but we
    // still account for it.
    if (validPreviewSizes.size() == 0) {
      Log.w(TAG, context.getString(R.string.no_same_Aspect_ratio));
      for (Camera.Size previewSize : supportedPreviewSizes) {
        // The null picture size will let us know that we shouldn't set a picture size.
        validPreviewSizes.add(new SizePair(previewSize, null));
      }
    }

    return validPreviewSizes;
  }
  public void onPreviewFrame(byte[] data, Camera camera) {
    Camera.Parameters parameters = camera.getParameters();
    Camera.Size size = parameters.getPreviewSize();

    Image barcode = new Image(size.width, size.height, "Y800");
    barcode.setData(data);

    int result = mScanner.scanImage(barcode);

    if (result != 0) {
      mCamera.cancelAutoFocus();
      mCamera.setPreviewCallback(null);
      mCamera.stopPreview();
      mPreviewing = false;
      SymbolSet syms = mScanner.getResults();
      for (Symbol sym : syms) {
        String symData = sym.getData();
        if (!TextUtils.isEmpty(symData)) {
          Intent dataIntent = new Intent();
          dataIntent.putExtra(SCAN_RESULT, symData);
          dataIntent.putExtra(SCAN_RESULT_TYPE, sym.getType());
          setResult(Activity.RESULT_OK, dataIntent);
          finish();
          break;
        }
      }
    }
  }
  private void doSetTorch(Camera.Parameters parameters, boolean newSetting, boolean safeMode) {
    String flashMode;
    if (newSetting) {
      flashMode =
          findSettableValue(
              parameters.getSupportedFlashModes(),
              Camera.Parameters.FLASH_MODE_TORCH,
              Camera.Parameters.FLASH_MODE_ON);
    } else {
      flashMode =
          findSettableValue(parameters.getSupportedFlashModes(), Camera.Parameters.FLASH_MODE_OFF);
    }
    if (flashMode != null) {
      parameters.setFlashMode(flashMode);
    }

    /*
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    if (!prefs.getBoolean(PreferencesActivity.KEY_DISABLE_EXPOSURE, false)) {
      if (!safeMode) {
        ExposureInterface exposure = new ExposureManager().build();
        exposure.setExposure(parameters, newSetting);
      }
    }
     */
  }
  public VideoHdrWidget(CameraManager cam, Context context) {
    super(cam, context, R.drawable.ic_widget_placeholder); // TODO: Icon, video hdr

    setVideoOnly(true);

    // We cannot inflate from XML here, because there are device-specific keys and values
    Camera.Parameters params = mCamManager.getParameters();
    if (params == null) {
      return;
    }

    if (params.get(KEY_SONY_VIDEO_HDR) != null) {
      // Use Sony values
      setKey(KEY_SONY_VIDEO_HDR);
      addValue("off", R.drawable.ic_widget_hdr_off, context.getString(R.string.disabled));
      addValue("on", R.drawable.ic_widget_hdr_on, context.getString(R.string.enabled));
    } else if (params.get(KEY_QCOM_VIDEO_HDR) != null) {
      // Use Qcom values
      setKey(KEY_QCOM_VIDEO_HDR);
      addValue("0", R.drawable.ic_widget_hdr_off, context.getString(R.string.disabled));
      addValue("1", R.drawable.ic_widget_hdr_on, context.getString(R.string.enabled));
    }

    getToggleButton().setHintText(R.string.widget_videohdr);
  }
 private void initCamera() {
   if (!isPreview) {
     camera = Camera.open();
   }
   if (camera != null && !isPreview) {
     streamIt = new StreamIt();
     try {
       Camera.Parameters parameters = camera.getParameters();
       parameters.setPreviewSize(screenWidth, screenHeight); // 设置预览照片的大小	
       parameters.setPreviewFpsRange(20, 30); // 每秒显示20~30帧	
       parameters.setPictureFormat(ImageFormat.NV21); // 设置图片格式	
       parameters.setPictureSize(screenWidth, screenHeight); // 设置照片的大小
       camera.setPreviewDisplay(surfaceHolder); // 通过SurfaceView显示取景画面
       camera.setPreviewCallback(streamIt); // 设置回调的类	
       camera.startPreview(); // 开始预览	
       camera.autoFocus(null); // 自动对焦
     } catch (Exception e) {
       e.printStackTrace();
     }
     isPreview = true;
     Thread postThread2 = new Thread(new postThread());
     postThread2.start();
     System.out.println("线程启动了@@@@@@@@@@@@@@@@@@@@@@@@@@");
   }
 }
 public static void setBestExposure(Camera.Parameters parameters, boolean lightOn) {
   int minExposure = parameters.getMinExposureCompensation();
   int maxExposure = parameters.getMaxExposureCompensation();
   float step = parameters.getExposureCompensationStep();
   if ((minExposure != 0 || maxExposure != 0) && step > 0.0f) {
     // Set low when light is on
     float targetCompensation = lightOn ? MIN_EXPOSURE_COMPENSATION : MAX_EXPOSURE_COMPENSATION;
     int compensationSteps = Math.round(targetCompensation / step);
     float actualCompensation = step * compensationSteps;
     // Clamp value:
     compensationSteps = Math.max(Math.min(compensationSteps, maxExposure), minExposure);
     if (parameters.getExposureCompensation() == compensationSteps) {
       Log.i(
           TAG,
           "Exposure compensation already set to "
               + compensationSteps
               + " / "
               + actualCompensation);
     } else {
       Log.i(
           TAG,
           "Setting exposure compensation to " + compensationSteps + " / " + actualCompensation);
       parameters.setExposureCompensation(compensationSteps);
     }
   } else {
     Log.i(TAG, "Camera does not support exposure compensation");
   }
 }
예제 #30
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  @Override
  public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i2, int i3) {
    Log.e("ok", "surfaceChanged => w=" + i2 + ", h=" + i3);
    // before changing the application orientation, you need to stop the preview, rotate and then
    // start it again
    if (surfaceHolder.getSurface() == null) // check if the surface is ready to receive camera data
    return;

    try {
      mCamera.stopPreview();
    } catch (Exception e) {
      // this will happen when you are trying the camera if it's not running
    }

    // now, recreate the camera preview
    try {

      Camera.Parameters parameters = mCamera.getParameters();
      List<String> focusModes = parameters.getSupportedFocusModes();
      if (focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
        parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
      }
      parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
      mCamera.setParameters(parameters);
      mCamera.setDisplayOrientation(90);
      mCamera.startPreview(mHolder);
    } catch (IOException e) {
      Log.d("ERROR", "Camera error on surfaceChanged " + e.getMessage());
    }
  }