Java StreamConfigurationMap類代碼示例

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
/**
 * <p>Collects some information from {@link #mCameraCharacteristics}.</p>
 * <p>This rewrites {@link #mPreviewSizes}, {@link #mPictureSizes}, and optionally,
 * {@link #mAspectRatio}.</p>
 */
private void collectCameraInfo() {
    StreamConfigurationMap map = mCameraCharacteristics.get(
            CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
    if (map == null) {
        throw new IllegalStateException("Failed to get configuration map: " + mCameraId);
    }
    mPreviewSizes.clear();
    for (android.util.Size size : map.getOutputSizes(mPreview.getOutputClass())) {
        mPreviewSizes.add(new Size(size.getWidth(), size.getHeight()));
    }
    mPictureSizes.clear();
    collectPictureSizes(mPictureSizes, map);

    if (!mPreviewSizes.ratios().contains(mAspectRatio)) {
        mAspectRatio = mPreviewSizes.ratios().iterator().next();
    }
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
public void open() {
    try {
        CameraManager manager = (CameraManager) mActivity.getSystemService(Context.CAMERA_SERVICE);
        for (String cameraId : manager.getCameraIdList()) {
            CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId);
            if (characteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_BACK) {
                StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
                mCameraSize = map.getOutputSizes(SurfaceTexture.class)[0];

                HandlerThread thread = new HandlerThread("OpenCamera");
                thread.start();
                Handler backgroundHandler = new Handler(thread.getLooper());

                manager.openCamera(cameraId, mCameraDeviceCallback, null);

                // カメラの物理的な情報を得る
                mCameraCharacteristics = manager.getCameraCharacteristics( cameraId );
                return;
            }
        }
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
@Override
public void collectRatioSizes() {
    ratioSizeList.clear();
    CameraCharacteristics characteristics;
    StreamConfigurationMap map = null;
    try {
        characteristics = ((CameraManager) getContext().getSystemService(Context.CAMERA_SERVICE)).getCameraCharacteristics(Integer.toString(Integer.parseInt(getCameraId())));
        map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }

    Size[] outputSizes = map.getOutputSizes(SurfaceTexture.class);
    if (outputSizes != null) {
        List<Double> ratioList = new ArrayList<>();
        for (Size size : outputSizes) {
            double ratio = (double) size.getWidth() / (double) size.getHeight();
            if (!ratioList.contains(ratio)) {
                ratioList.add(ratio);
                ratioSizeList.add(new AspectRatio(ratio, size.getWidth(), size.getHeight()));
            }
        }
    }
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
private void startPreview() {
    try {
        CameraCharacteristics characteristics = cameraManager.getCameraCharacteristics(cameraId);
        StreamConfigurationMap configMap = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);

        Size previewSize = Util.getPreferredPreviewSize(
                configMap.getOutputSizes(ImageFormat.JPEG),textureView.getWidth(), textureView.getHeight());

        surfaceTexture.setDefaultBufferSize(previewSize.getWidth(),previewSize.getHeight());
        Surface surface = new Surface(surfaceTexture);
        captureBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
        captureBuilder.addTarget(surface);

        cameraDevice.createCaptureSession(Arrays.asList(surface),captureSessionCallback,backgroundHandler);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
@Override
protected List<PreviewSize> getSupportedSize() {
    try {
        CameraCharacteristics characteristics = mCameraManager.getCameraCharacteristics(
                getCurrentCameraId());
        StreamConfigurationMap map =
                characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
        if (map == null) {
            return Collections.singletonList(new PreviewSize(mPreviewWidth, mPreviewHeight));
        }
        Size[] supportedSize = map.getOutputSizes(SurfaceTexture.class);
        if (supportedSize == null || supportedSize.length == 0) {
            return Collections.singletonList(new PreviewSize(mPreviewWidth, mPreviewHeight));
        }
        List<PreviewSize> results = new ArrayList<>();
        for (Size size : supportedSize) {
            results.add(new PreviewSize(size.getWidth(), size.getHeight()));
        }
        return results;
    } catch (CameraAccessException e) {
        throw new CameraAccessError();
    }
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
private List<Size> getSizes(StreamConfigurationMap map) {
    Size[] sizes = map.getOutputSizes(MediaRecorder.class);

    // StreamConfigurationMap.getOutputSizes(MediaRecorder.class) only tells us if the
    // camera supports these sizes. It does not tell us if MediaRecorder supports these
    // sizes, odd as that sounds. Therefore, we need to filter ourselves manually.
    List<Size> filtered;
    if (CamcorderProfile.hasProfile(getCameraId(), CamcorderProfile.QUALITY_2160P)) {
        filtered = filter(sizes, SIZE_4K);
        if (!filtered.isEmpty()) {
            return filtered;
        }
    }
    if (CamcorderProfile.hasProfile(getCameraId(), CamcorderProfile.QUALITY_1080P)) {
        filtered = filter(sizes, SIZE_1080P);
        if (!filtered.isEmpty()) {
            return filtered;
        }
    }
    if (CamcorderProfile.hasProfile(getCameraId(), CamcorderProfile.QUALITY_720P)) {
        filtered = filter(sizes, SIZE_720P);
        if (!filtered.isEmpty()) {
            return filtered;
        }
    }
    if (CamcorderProfile.hasProfile(getCameraId(), CamcorderProfile.QUALITY_480P)) {
        filtered = filter(sizes, SIZE_480P);
        if (!filtered.isEmpty()) {
            return filtered;
        }
    }
    return Arrays.asList(sizes);
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
@Override
void initialize(StreamConfigurationMap map) {
    if (DEBUG) Log.d(TAG, "Initializing PreviewSession");
    super.initialize(chooseOptimalSize(getSizes(map), mCameraView.getWidth(), mCameraView.getHeight()));

    SurfaceTexture texture = mCameraView.getSurfaceTexture();
    if (texture == null) {
        // This will be caught in Camera2Module.setSession
        throw new IllegalStateException(
                "Expected a SurfaceTexture to exist, but none does. "
                    + "Was the SurfaceTexture already closed?");
    }
    texture.setDefaultBufferSize(getWidth(), getHeight());

    // This is the output Surface we need to start the preview.
    mSurface = new Surface(texture);
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
private static Size findBestPreviewSize(@NonNull StreamConfigurationMap scMap, int width, int height) {
    List<Size> sizes = new ArrayList<>(Arrays.asList(scMap.getOutputSizes(SurfaceTexture.class)));
    for (Iterator<Size> itr = sizes.iterator(); itr.hasNext(); ) {
        Size size = itr.next();
        if (size.getWidth() < width || size.getHeight() < height) {
            itr.remove();
        }
    }
    if (sizes.size() == 0) {
        sizes = new ArrayList<>(Arrays.asList(scMap.getOutputSizes(SurfaceTexture.class)));
    }
    Collections.sort(sizes, new Comparator<Size>() {
        @Override
        public int compare(Size s1, Size s2) {
            return s2.getWidth() * s2.getHeight() - s1.getWidth() * s1.getHeight();
        }
    });
    return (sizes.size() > 0) ? sizes.get(sizes.size() - 1) : null;
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
/**
 * @return The largest supported picture size.
 */
public Size getDefaultPictureSize() {
    StreamConfigurationMap configs = mCharacteristics.get(
            CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
    android.util.Size[] supportedSizes = configs.getOutputSizes(sCaptureImageFormat);

    // Find the largest supported size.
    android.util.Size largestSupportedSize = supportedSizes[0];
    long largestSupportedSizePixels = largestSupportedSize.getWidth()
            * largestSupportedSize.getHeight();
    for (int i = 0; i < supportedSizes.length; i++) {
        long numPixels = supportedSizes[i].getWidth() * supportedSizes[i].getHeight();
        if (numPixels > largestSupportedSizePixels) {
            largestSupportedSize = supportedSizes[i];
            largestSupportedSizePixels = numPixels;
        }
    }

    return new Size(largestSupportedSize.getWidth(),
            largestSupportedSize.getHeight());
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
private String chooseCamera() {
  final CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
  try {
    for (final String cameraId : manager.getCameraIdList()) {
      final CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId);

      // We don't use a front facing camera in this sample.
      final Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING);
      if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT) {
        continue;
      }

      final StreamConfigurationMap map =
          characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);

      if (map == null) {
        continue;
      }

      useCamera2API = isHardwareLevelSupported(characteristics,
          CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_FULL);
      LOGGER.i("Camera API lv2?: %s", useCamera2API);
      return cameraId;
    }
  } catch (CameraAccessException e) {
    LOGGER.e(e, "Not allowed to access camera");
  }

  return null;
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
@Override
protected void collectPictureSizes(SizeMap sizes, StreamConfigurationMap map) {
    // Try to get hi-res output sizes
    android.util.Size[] outputSizes = map.getHighResolutionOutputSizes(ImageFormat.JPEG);
    if (outputSizes != null) {
        for (android.util.Size size : map.getHighResolutionOutputSizes(ImageFormat.JPEG)) {
            sizes.add(new Size(size.getWidth(), size.getHeight()));
        }
    }
    if (sizes.isEmpty()) {
        super.collectPictureSizes(sizes, map);
    }
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
/**
 * Configure the surfaceview and RS processing.
 */
private void configureSurfaces() {
    // Find a good size for output - largest 16:9 aspect ratio that's less than 720p
    final int MAX_WIDTH = 1280;
    final float TARGET_ASPECT = 16.f / 9.f;
    final float ASPECT_TOLERANCE = 0.1f;

    StreamConfigurationMap configs =
            mCameraInfo.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);

    Size[] outputSizes = configs.getOutputSizes(SurfaceHolder.class);

    Size outputSize = outputSizes[0];
    float outputAspect = (float) outputSize.getWidth() / outputSize.getHeight();
    for (Size candidateSize : outputSizes) {
        if (candidateSize.getWidth() > MAX_WIDTH)
            continue;
        float candidateAspect = (float) candidateSize.getWidth() / candidateSize.getHeight();
        boolean goodCandidateAspect =
                Math.abs(candidateAspect - TARGET_ASPECT) < ASPECT_TOLERANCE;
        boolean goodOutputAspect = Math.abs(outputAspect - TARGET_ASPECT) < ASPECT_TOLERANCE;
        if ((goodCandidateAspect && !goodOutputAspect) ||
                candidateSize.getWidth() > outputSize.getWidth()) {
            outputSize = candidateSize;
            outputAspect = candidateAspect;
        }
    }
    Log.i(TAG, "Resolution chosen: " + outputSize);

    setupProcessing(outputSize);

    // this will trigger onSurfaceChanged()
    getViewfinderSurfaceView().getHolder()
            .setFixedSize(outputSize.getWidth(), outputSize.getHeight());
    getViewfinderSurfaceView().setAspectRatio(outputAspect);
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
/**
 * Sets the preview size of the fragment
 * @param width  The width of available size for camera preview
 * @param height The height of available size for camera preview
 * @param swappedDimensions - boolean indicating if dimensions need to be swapped
 * @param map - Configurationmap of the camera
 * @return mPreviewSize - the previewsize that is set in the fragment
 */
private Size setFragmentPreviewSize(int width, int height, boolean swappedDimensions, StreamConfigurationMap map) {
    // For still image captures, we use the largest available size.
    Size largest = Collections.max(
            Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)),
            new CameraFragmentUtil.CompareSizesByArea());

    Point displaySize = new Point();
    fragment.getActivity().getWindowManager().getDefaultDisplay().getSize(displaySize);
    int rotatedPreviewWidth = width;
    int rotatedPreviewHeight = height;
    int maxPreviewWidth = displaySize.x;
    int maxPreviewHeight = displaySize.y;

    if (swappedDimensions) {
        rotatedPreviewWidth = height;
        rotatedPreviewHeight = width;
        maxPreviewWidth = displaySize.y;
        maxPreviewHeight = displaySize.x;
    }

    if (maxPreviewWidth > MAX_PREVIEW_WIDTH) {
        maxPreviewWidth = MAX_PREVIEW_WIDTH;
    }
    if (maxPreviewHeight > MAX_PREVIEW_HEIGHT) {
        maxPreviewHeight = MAX_PREVIEW_HEIGHT;
    }
    // Attempting to use too large a preview size could  exceed the camera bus' bandwidth
    // limitation, resulting in gorgeous previews but the storage of garbage capture data.
    Size mPreviewSize = CameraFragmentUtil.chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class),
            rotatedPreviewWidth, rotatedPreviewHeight, maxPreviewWidth,
            maxPreviewHeight, largest);
    fragment.setPreviewSize(mPreviewSize);
    return mPreviewSize;
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
public Size[] getCameraResolutionsBack() {
  try {
    CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics("0");
    if (cameraCharacteristics.get(CameraCharacteristics.LENS_FACING)
        != CameraCharacteristics.LENS_FACING_BACK) {
      cameraCharacteristics = cameraManager.getCameraCharacteristics("1");
    }
    StreamConfigurationMap streamConfigurationMap =
        cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
    return streamConfigurationMap.getOutputSizes(SurfaceTexture.class);
  } catch (CameraAccessException e) {
    Log.e(TAG, e.getMessage());
    return new Size[0];
  }
}
 

import android.hardware.camera2.params.StreamConfigurationMap; //導入依賴的package包/類
public Size[] getCameraResolutionsFront() {
  try {
    CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics("0");
    if (cameraCharacteristics.get(CameraCharacteristics.LENS_FACING)
        != CameraCharacteristics.LENS_FACING_FRONT) {
      cameraCharacteristics = cameraManager.getCameraCharacteristics("1");
    }
    StreamConfigurationMap streamConfigurationMap =
        cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
    return streamConfigurationMap.getOutputSizes(SurfaceTexture.class);
  } catch (CameraAccessException e) {
    Log.e(TAG, e.getMessage());
    return new Size[0];
  }
}