/* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.camera; import android.content.Context; import android.content.res.Configuration; import android.view.Surface; import com.android.camera.debug.Log; import com.android.camera.debug.Log.Tag; import com.android.camera.util.CameraUtil; import com.android.camera.util.Size; import java.util.ArrayList; /** * Common utility methods used in capture modules. */ public class CaptureModuleUtil { private static final Tag TAG = new Tag("CaptureModuleUtil"); public static int getDeviceNaturalOrientation(Context context) { Configuration config = context.getResources().getConfiguration(); int rotation = CameraUtil.getDisplayRotation(); if (((rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180) && config.orientation == Configuration.ORIENTATION_LANDSCAPE) || ((rotation == Surface.ROTATION_90 || rotation == Surface.ROTATION_270) && config.orientation == Configuration.ORIENTATION_PORTRAIT)) { return Configuration.ORIENTATION_LANDSCAPE; } else { return Configuration.ORIENTATION_PORTRAIT; } } /** * Equivalent to the * {@link CameraUtil#getOptimalPreviewSize(java.util.List, double)} * method for the camera1 api. */ public static Size getOptimalPreviewSize(Size[] sizes,double targetRatio) { return getOptimalPreviewSize(sizes, targetRatio, null); } /** * Returns the best preview size based on the current display resolution, * the available preview sizes, the target aspect ratio (typically the * aspect ratio of the picture to be taken) as well as a maximum allowed * tolerance. If tolerance is 'null', a default tolerance will be used. */ public static Size getOptimalPreviewSize(Size[] sizes, double targetRatio, Double aspectRatioTolerance) { // TODO(andyhuibers): Don't hardcode this but use device's measurements. final int MAX_ASPECT_HEIGHT = 1080; // Count sizes with height <= 1080p to mimic camera1 api behavior. int count = 0; for (Size s : sizes) { if (s.getHeight() <= MAX_ASPECT_HEIGHT) { count++; } } ArrayList camera1Sizes = new ArrayList(count); // Set array of all sizes with height <= 1080p for (Size s : sizes) { if (s.getHeight() <= MAX_ASPECT_HEIGHT) { camera1Sizes.add(new Size(s.getWidth(), s.getHeight())); } } int optimalIndex = CameraUtil .getOptimalPreviewSizeIndex(camera1Sizes, targetRatio, aspectRatioTolerance); if (optimalIndex == -1) { return null; } Size optimal = camera1Sizes.get(optimalIndex); for (Size s : sizes) { if (s.getWidth() == optimal.getWidth() && s.getHeight() == optimal.getHeight()) { return s; } } return null; } /** * Selects the preview buffer dimensions that are closest in size to the * size of the view containing the preview. */ public static Size pickBufferDimensions(Size[] supportedPreviewSizes, double bestPreviewAspectRatio, Context context) { // Swap dimensions if the device is not in its natural orientation. boolean swapDimens = (CameraUtil.getDisplayRotation() % 180) == 90; // Swap dimensions if the device's natural orientation doesn't match // the sensor orientation. if (CaptureModuleUtil.getDeviceNaturalOrientation(context) == Configuration.ORIENTATION_PORTRAIT) { swapDimens = !swapDimens; } double bestAspect = bestPreviewAspectRatio; if (swapDimens) { bestAspect = 1 / bestAspect; } Size pick = CaptureModuleUtil.getOptimalPreviewSize(supportedPreviewSizes, bestPreviewAspectRatio, null); Log.d(TAG, "Picked buffer size: " + pick.toString()); return pick; } }