/**
 * {@inheritDoc}
 */
@Override
public int compare(Size size, Size size2) {
    checkNotNull(size, "size must not be null");
    checkNotNull(size2, "size2 must not be null");

    if (size.equals(size2)) {
        return 0;
    }

    long width = size.getWidth();
    long width2 = size2.getWidth();
    long area = width * size.getHeight();
    long area2 = width2 * size2.getHeight();

    if (area == area2) {
        return (width > width2) ? 1 : -1;
    }

    return (area > area2) ? 1 : -1;
}
 

/**
 * Given {@code choices} of {@code Size}s supported by a camera, chooses the smallest one whose
 * width and height are at least as large as the respective requested values, and whose aspect
 * ratio matches with the specified value.
 *
 * @param choices     The list of sizes that the camera supports for the intended output class
 * @param width       The minimum desired width
 * @param height      The minimum desired height
 * @param aspectRatio The aspect ratio
 * @return The optimal {@code Size}, or an arbitrary one if none were big enough
 */
private static Size chooseOptimalSize(Size[] choices, int width, int height, Size aspectRatio) {
    // Collect the supported resolutions that are at least as big as the preview Surface
    List<Size> bigEnough = new ArrayList<Size>();
    int w = aspectRatio.getWidth();
    int h = aspectRatio.getHeight();
    for (Size option : choices) {
        if (option.getHeight() == option.getWidth() * h / w &&
                option.getWidth() >= width && option.getHeight() >= height) {
            bigEnough.add(option);
        }
    }

    // Pick the smallest of those, assuming we found any
    if (bigEnough.size() > 0) {
        return Collections.min(bigEnough, new CompareSizesByArea());
    } else {
        Log.e(TAG, "Couldn't find any suitable preview size");
        return choices[0];
    }
}
 

/**
 * Given {@code choices} of {@code Size}s supported by a camera, chooses the smallest one whose
 * width and height are at least as large as the minimum of both, or an exact match if possible.
 *
 * @param choices The list of sizes that the camera supports for the intended output class
 * @return The optimal {@code Size}, or an arbitrary one if none were big enough
 */
private static Size chooseOptimalSize(final Size[] choices) {
    final int minSize = Math.max(Math.min(DESIRED_PREVIEW_SIZE.getWidth(),
            DESIRED_PREVIEW_SIZE.getHeight()), MINIMUM_PREVIEW_SIZE);

    // Collect the supported resolutions that are at least as big as the preview Surface
    final List<Size> bigEnough = new ArrayList();
    for (final Size option : choices) {
        if (option.equals(DESIRED_PREVIEW_SIZE)) {
            return DESIRED_PREVIEW_SIZE;
        }

        if (option.getHeight() >= minSize && option.getWidth() >= minSize) {
            bigEnough.add(option);
        }
    }

    // Pick the smallest of those, assuming we found any
    return (bigEnough.size() > 0) ? Collections.min(bigEnough, new CompareSizesByArea()) : choices[0];
}
 

/**
 * カメラがサポートしているプレビューサイズから指定のサイズに近い値を返却します.
 *
 * @param width 横幅
 * @param height 縦幅
 * @return 近い値
 */
public Size getApproximatePreviewSize(final int width, final int height) {
    List<Size> sizes = getSupportedPreviewSizes();
    if (sizes.isEmpty()) {
        return null;
    }

    Size currentSize = sizes.get(0);
    int value = Integer.MAX_VALUE;
    for (Size size : sizes) {
        int dw = width - size.getWidth();
        int dh = height - size.getHeight();
        int dist = dw * dw + dh * dh;
        if (dist < value) {
            currentSize = size;
            value = dist;
        }
    }
    return currentSize;
}
 

@SuppressWarnings("unchecked")
private void layoutOverflowPanelItems(List<MenuItem> menuItems) {
    ArrayAdapter<MenuItem> overflowPanelAdapter = (ArrayAdapter<MenuItem>) mOverflowPanel.getAdapter();
    overflowPanelAdapter.clear();
    final int size = menuItems.size();
    for (int i = 0; i < size; i++) {
        overflowPanelAdapter.add(menuItems.get(i));
    }
    mOverflowPanel.setAdapter(overflowPanelAdapter);
    if (mOpenOverflowUpwards) {
        mOverflowPanel.setY(0);
    } else {
        mOverflowPanel.setY(mOverflowButtonSize.getHeight());
    }
    int width = Math.max(getOverflowWidth(), mOverflowButtonSize.getWidth());
    int height = calculateOverflowHeight(MAX_OVERFLOW_SIZE);
    mOverflowPanelSize = new Size(width, height);
    setSize(mOverflowPanel, mOverflowPanelSize);
}
 

/**
 * カメラデバイスの設定を初期化します.
 */
private void initSettings() {
    try {
        String cameraId = Camera2Helper.getCameraId(mCameraManager, CameraCharacteristics.LENS_FACING_BACK);
        if (cameraId == null) {
            cameraId = Camera2Helper.getCameraId(mCameraManager, CameraCharacteristics.LENS_FACING_FRONT);
        }
        mSettings.setCameraId(cameraId);
    } catch (Exception e) {
        throw new RuntimeException("Not support.");
    }

    List<Size> pictureSizes = mSettings.getSupportedPictureSizes();
    if (!pictureSizes.isEmpty()) {
        mSettings.setPictureSize(pictureSizes.get(0));
    }

    List<Size> previewSizes = mSettings.getSupportedPreviewSizes();
    if (!previewSizes.isEmpty()) {
        mSettings.setPreviewSize(previewSizes.get(previewSizes.size() - 2));
    }
}
 

@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();
    }
}
 

/**
 * カメラID に対応したカメラデバイスがサポートしているプレビューサイズのリストを取得します.
 *
 * @param cameraManager カメラマネージャ
 * @param cameraId カメラID
 * @return サポートしているプレビューサイズのリスト
 */
@NonNull
private static List<Size> getSupportedPreviewSizes(final CameraManager cameraManager, final String cameraId) {
    List<Size> previewSizes = new ArrayList<>();
    try {
        CameraCharacteristics characteristics = cameraManager.getCameraCharacteristics(cameraId);
        StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
        if (map != null) {
            previewSizes = Arrays.asList(map.getOutputSizes(SurfaceTexture.class));
            Collections.sort(previewSizes, SIZE_COMPARATOR);
        }
    } catch (CameraAccessException e) {
        // ignore.
    }
    return previewSizes;
}
 

public Size[] getCameraResolutions(Facing facing) {
  try {
    CameraCharacteristics characteristics = getCharacteristicsForFacing(cameraManager, facing);
    if (characteristics == null) {
      return new Size[0];
    }

    StreamConfigurationMap streamConfigurationMap =
        characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
    Size[] outputSizes = streamConfigurationMap.getOutputSizes(SurfaceTexture.class);
    return outputSizes != null ? outputSizes : new Size[0];
  } catch (CameraAccessException | NullPointerException e) {
    Log.e(TAG, "Error", e);
    return new Size[0];
  }
}
 

/**
 * Given {@code choices} of {@code Size}s supported by a camera, chooses the smallest one whose
 * width and height are at least as large as the respective requested values, and whose aspect
 * ratio matches with the specified value.
 *
 * @param choices     The list of sizes that the camera supports for the intended output class
 * @param width       The minimum desired width
 * @param height      The minimum desired height
 * @param aspectRatio The aspect ratio
 * @return The optimal {@code Size}, or an arbitrary one if none were big enough
 */
@SuppressLint("LongLogTag")
@DebugLog
private static Size chooseOptimalSize(
        final Size[] choices, final int width, final int height, final Size aspectRatio) {
    // Collect the supported resolutions that are at least as big as the preview Surface
    final List<Size> bigEnough = new ArrayList<Size>();
    for (final Size option : choices) {
        if (option.getHeight() >= MINIMUM_PREVIEW_SIZE && option.getWidth() >= MINIMUM_PREVIEW_SIZE) {
            Log.i(TAG, "Adding size: " + option.getWidth() + "x" + option.getHeight());
            bigEnough.add(option);
        } else {
            Log.i(TAG, "Not adding size: " + option.getWidth() + "x" + option.getHeight());
        }
    }

    // Pick the smallest of those, assuming we found any
    if (bigEnough.size() > 0) {
        final Size chosenSize = Collections.min(bigEnough, new CompareSizesByArea());
        Log.i(TAG, "Chosen size: " + chosenSize.getWidth() + "x" + chosenSize.getHeight());
        return chosenSize;
    } else {
        Log.e(TAG, "Couldn't find any suitable preview size");
        return choices[0];
    }
}
 

protected void setFragment() {
    cameraId = chooseCamera();
    final CameraConnectionFragment fragment =
            CameraConnectionFragment.newInstance(
                    new CameraConnectionFragment.ConnectionCallback() {
                        @Override
                        public void onPreviewSizeChosen(final Size previewSize, final Size cameraViewSize, final int rotation) {
                            BaseCameraActivity.this.onPreviewSizeChosen(previewSize, cameraViewSize, rotation);
                        }
                    },
                    this,
                    getLayoutId(),
                    getDesiredPreviewFrameSize());

    fragment.setCamera(cameraId);

    getFragmentManager()
            .beginTransaction()
            .replace(R.id.camera_container, fragment)
            .commit();
}
 

/**
 * Configures the necessary {@link Matrix} transformation to `mTextureView`.
 * This method should be called after the camera preview size is determined in
 * setUpCameraOutputs and also the size of `mTextureView` is fixed.
 *
 * @param viewWidth  The width of `mTextureView`
 * @param viewHeight The height of `mTextureView`
 */
private void configureTransform(final int viewWidth, final int viewHeight) {
    Size previewSize = mSettings.getPreviewSize();
    int rotation = Camera2Helper.getDisplayRotation(mContext);
    Matrix matrix = new Matrix();
    RectF viewRect = new RectF(0, 0, viewWidth, viewHeight);
    RectF bufferRect = new RectF(0, 0, previewSize.getHeight(), previewSize.getWidth());
    float centerX = viewRect.centerX();
    float centerY = viewRect.centerY();
    if (Surface.ROTATION_90 == rotation || Surface.ROTATION_270 == rotation) {
        bufferRect.offset(centerX - bufferRect.centerX(), centerY - bufferRect.centerY());
        matrix.setRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.FILL);
        float scale = Math.max(
                (float) viewHeight / previewSize.getHeight(),
                (float) viewWidth / previewSize.getWidth());
        matrix.postScale(scale, scale, centerX, centerY);
        matrix.postRotate(90 * (rotation - 2), centerX, centerY);
    } else if (Surface.ROTATION_180 == rotation) {
        matrix.postRotate(180, centerX, centerY);
    }
    mTextureView.setTransform(matrix);
}
 

private void appendOutputsString(StringBuilder sb) {
    sb.append("Outputs(");
    int[] formats = getOutputFormats();
    for (int format : formats) {
        Size[] sizes = getOutputSizes(format);
        for (Size size : sizes) {
            long minFrameDuration = getOutputMinFrameDuration(format, size);
            long stallDuration = getOutputStallDuration(format, size);
            sb.append(String.format("[w:%d, h:%d, format:%s(%d), min_duration:%d, " +
                    "stall:%d], ", size.getWidth(), size.getHeight(), formatToString(format),
                    format, minFrameDuration, stallDuration));
        }
    }
    // Remove the pending ", "
    if (sb.charAt(sb.length() - 1) == ' ') {
        sb.delete(sb.length() - 2, sb.length());
    }
    sb.append(")");
}
 

protected void setFragment() {
    cameraId = chooseCamera();
    final CameraConnectionFragment fragment =
            CameraConnectionFragment.newInstance(
                    new CameraConnectionFragment.ConnectionCallback() {
                        @Override
                        public void onPreviewSizeChosen(final Size previewSize, final Size cameraViewSize, final int rotation) {
                            BaseCameraActivity.this.onPreviewSizeChosen(previewSize, cameraViewSize, rotation);
                        }
                    },
                    this,
                    getLayoutId(),
                    getDesiredPreviewFrameSize());

    fragment.setCamera(cameraId);

    getFragmentManager()
            .beginTransaction()
            .replace(R.id.camera_container, fragment)
            .commit();
}
 

/**
 * Create a new {@link HighSpeedVideoConfiguration}.
 *
 * @param width image width, in pixels (positive)
 * @param height image height, in pixels (positive)
 * @param fpsMin minimum frames per second for the configuration (positive)
 * @param fpsMax maximum frames per second for the configuration (larger or equal to 60)
 *
 * @throws IllegalArgumentException
 *              if width/height/fpsMin were not positive or fpsMax less than 60
 *
 * @hide
 */
public HighSpeedVideoConfiguration(
        final int width, final int height, final int fpsMin, final int fpsMax,
        final int batchSizeMax) {
    if (fpsMax < HIGH_SPEED_MAX_MINIMAL_FPS) {
        throw new IllegalArgumentException("fpsMax must be at least " +
                HIGH_SPEED_MAX_MINIMAL_FPS);
    }
    mFpsMax = fpsMax;
    mWidth = checkArgumentPositive(width, "width must be positive");
    mHeight = checkArgumentPositive(height, "height must be positive");
    mFpsMin = checkArgumentPositive(fpsMin, "fpsMin must be positive");
    mSize = new Size(mWidth, mHeight);
    mBatchSizeMax = checkArgumentPositive(batchSizeMax, "batchSizeMax must be positive");
    mFpsRange = new Range<Integer>(mFpsMin, mFpsMax);
}
 

public static ImageTransferFormatSelectorDialogFragment newInstance(boolean isEInkModeEnabled, Size resolution) {
    ImageTransferFormatSelectorDialogFragment fragment = new ImageTransferFormatSelectorDialogFragment();
    Bundle args = new Bundle();
    args.putBoolean(ARG_PARAM_ISEINKMODEENABLED, isEInkModeEnabled);
    args.putInt(ARG_PARAM_RESOLUTION_WIDTH, resolution.getWidth());
    args.putInt(ARG_PARAM_RESOLUTION_HEIGHT, resolution.getHeight());
    fragment.setArguments(args);
    return fragment;
}
 

protected Size calculateViewSize(int width, int height, Size maxSize) {
    int h = maxSize.getWidth() * height / width;
    if (h % 2 != 0) {
        h--;
    }
    if (maxSize.getHeight() < h) {
        int w = maxSize.getHeight() * width / height;
        if (w % 2 != 0) {
            w--;
        }
        return new Size(w, maxSize.getHeight());
    }
    return new Size(maxSize.getWidth(), h);
}
 

private Size chooseOptimalSize(Size[] sizes, int viewWidth, int viewHeight, Size pictureSize) {
    int totalRotation = getRotation();
    boolean swapRotation = totalRotation == 90 || totalRotation == 270;
    int width = swapRotation ? viewHeight : viewWidth;
    int height = swapRotation ? viewWidth : viewHeight;
    return getSuitableSize(sizes, width, height, pictureSize);
}
 

public static CameraConnectionFragment newInstance(
        final ConnectionCallback callback,
        final OnImageAvailableListener imageListener,
        final int layout,
        final Size inputSize) {
    return new CameraConnectionFragment(callback, imageListener, layout, inputSize);
}
 

@NonNull
private static MediaFormat createVideoOutputFormatWithAvailableEncoders(@NonNull final VideoFormatMimeType mimeType,
                                                                        final int bitrate,
                                                                        @NonNull final Size outputResolution) {
    final MediaCodecList mediaCodecList = new MediaCodecList(MediaCodecList.REGULAR_CODECS);

    if (mimeType != VideoFormatMimeType.AUTO) {
        final MediaFormat mediaFormat = createVideoFormat(mimeType.getFormat(), bitrate, outputResolution);
        if (mediaCodecList.findEncoderForFormat(mediaFormat) != null) {
            return mediaFormat;
        }
    }

    final MediaFormat hevcMediaFormat = createVideoFormat(VideoFormatMimeType.HEVC.getFormat(), bitrate, outputResolution);
    if (mediaCodecList.findEncoderForFormat(hevcMediaFormat) != null) {
        return hevcMediaFormat;
    }

    final MediaFormat avcMediaFormat = createVideoFormat(VideoFormatMimeType.AVC.getFormat(), bitrate, outputResolution);
    if (mediaCodecList.findEncoderForFormat(avcMediaFormat) != null) {
        return avcMediaFormat;
    }

    final MediaFormat mp4vesMediaFormat = createVideoFormat(VideoFormatMimeType.MPEG4.getFormat(), bitrate, outputResolution);
    if (mediaCodecList.findEncoderForFormat(mp4vesMediaFormat) != null) {
        return mp4vesMediaFormat;
    }

    return createVideoFormat(VideoFormatMimeType.H263.getFormat(), bitrate, outputResolution);
}
 

/**
 * In this sample, we choose a video size with 3x4 aspect ratio. Also, we don't use sizes
 * larger than 1080p, since MediaRecorder cannot handle such a high-resolution video.
 *
 * @param choices The list of available sizes
 * @return The video size
 */
private static Size chooseVideoSize(Size[] choices) {
    for (Size size : choices) {
        if (size.getWidth() == 1280 && size.getHeight() <= 720) {
            return size;
        }
    }
    Log.e(TAG, "Couldn't find any suitable video size");
    return choices[choices.length - 1];
}
 

public synchronized CameraApi configCamera() {
    if (mCamera == null) {
        if (cameraApiCallback != null)
            cameraApiCallback.onNotSupportErrorTip(context.getString(R.string.init_camera_error));
        return this;
    }
    mCameraParameters = mCamera.getParameters();
    List<Integer> supportFormat = mCameraParameters.getSupportedPreviewFormats();
    for (Integer f : supportFormat
            ) {
        Log.e(TAG, "configCamera: f = " + f + "--");
    }
    List<Camera.Size> supportedPreviewSizes = mCameraParameters.getSupportedPreviewSizes();
    if (!isPreviewSizeSupport(supportedPreviewSizes)) {
        mPreviewWidth = DEFAULT_PREVIEW_WIDTH;
        mPreviewHeight = DEFAULT_PREVIEW_HEIGHT;
    }
    mCameraParameters.setPreviewFormat(ImageFormat.NV21);
    mCameraParameters.setPreviewSize(mPreviewWidth, mPreviewHeight);
    setCameraFps(mCameraParameters, fps);
    mCamera.setParameters(mCameraParameters);
    setupOrientaition(context);
    for (int i = 0; i < BUFFER_COUNT; i++) {
        mCamera.addCallbackBuffer(new byte[mPreviewHeight * mPreviewWidth * 3 / 2]);
    }
    return this;
}
 

public static CameraConnectionFragment newInstance(
        final ConnectionCallback callback,
        final OnImageAvailableListener imageListener,
        final int layout,
        final Size inputSize,
        CameraOpenListener openListener) {
    return new CameraConnectionFragment(callback, imageListener, layout, inputSize, openListener);
}
 

static Size getBestCameraSize(Size[] availableCameraResolutions, Size minSize) {
    // This should select the closest size that is not too small
    Arrays.sort(availableCameraResolutions, new CompareSizesByArea()); // Sort by smallest first
    for (Size resolution : availableCameraResolutions) {
        if (resolution.getWidth() >= minSize.getWidth() &&
                resolution.getHeight() >= minSize.getHeight()) {
            return resolution;
        }
    }
    return null;
}
 

private CameraConnectionFragment(
        final ConnectionCallback connectionCallback,
        final OnImageAvailableListener imageListener,
        final int layout,
        final Size inputSize) {
    this.cameraConnectionCallback = connectionCallback;
    this.imageListener = imageListener;
    this.layout = layout;
    this.inputSize = inputSize;
}
 

@Override
public int compare(Size lhs, Size rhs) {
    Log.d(TAG, "compare: ");
    // We cast here to ensure the multiplications won't overflow
    return Long.signum((long) lhs.getWidth() * lhs.getHeight() -
            (long) rhs.getWidth() * rhs.getHeight());
}
 

private boolean isWithinBounds(Context context, MasterSecret masterSecret, Uri uri) throws IOException {
    try {
        InputStream is = PartAuthority.getAttachmentStream(context, masterSecret, uri);
        Size size = BitmapUtils.INSTANCE.getImageDimensions(is);
        return size.getWidth() > 0 && size.getWidth() <= getImageMaxWidth(context) &&
                size.getHeight() > 0 && size.getHeight() <= getImageMaxHeight(context);
    } catch (Exception e) {
        throw new IOException(e);
    }
}
 

public static WmDisplayCutout computeSafeInsets(DisplayCutout inner,
        int displayWidth, int displayHeight) {
    if (inner == DisplayCutout.NO_CUTOUT || inner.isBoundsEmpty()) {
        return NO_CUTOUT;
    }

    final Size displaySize = new Size(displayWidth, displayHeight);
    final Rect safeInsets = computeSafeInsets(displaySize, inner);
    return new WmDisplayCutout(inner.replaceSafeInsets(safeInsets), displaySize);
}
 

private CameraConnectionFragment(
        final ConnectionCallback connectionCallback,
        final OnImageAvailableListener imageListener,
        final int layout,
        final Size inputSize) {
    this.cameraConnectionCallback = connectionCallback;
    this.imageListener = imageListener;
    this.layout = layout;
    this.inputSize = inputSize;
}
 

/**
 * Create an OutputConfiguration from Parcel.
 */
private OutputConfiguration(@NonNull Parcel source) {
    int rotation = source.readInt();
    int surfaceSetId = source.readInt();
    int surfaceType = source.readInt();
    int width = source.readInt();
    int height = source.readInt();
    boolean isDeferred = source.readInt() == 1;
    boolean isShared = source.readInt() == 1;
    ArrayList<Surface> surfaces = new ArrayList<Surface>();
    source.readTypedList(surfaces, Surface.CREATOR);
    String physicalCameraId = source.readString();

    checkArgumentInRange(rotation, ROTATION_0, ROTATION_270, "Rotation constant");

    mSurfaceGroupId = surfaceSetId;
    mRotation = rotation;
    mSurfaces = surfaces;
    mConfiguredSize = new Size(width, height);
    mIsDeferredConfig = isDeferred;
    mIsShared = isShared;
    mSurfaces = surfaces;
    if (mSurfaces.size() > 0) {
        mSurfaceType = SURFACE_TYPE_UNKNOWN;
        mConfiguredFormat = SurfaceUtils.getSurfaceFormat(mSurfaces.get(0));
        mConfiguredDataspace = SurfaceUtils.getSurfaceDataspace(mSurfaces.get(0));
        mConfiguredGenerationId = mSurfaces.get(0).getGenerationId();
    } else {
        mSurfaceType = surfaceType;
        mConfiguredFormat = StreamConfigurationMap.imageFormatToInternal(ImageFormat.PRIVATE);
        mConfiguredDataspace =
                StreamConfigurationMap.imageFormatToDataspace(ImageFormat.PRIVATE);
        mConfiguredGenerationId = 0;
    }
    mPhysicalCameraId = physicalCameraId;
}