| /* |
| * Copyright (C) 2015 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.one.v2; |
| |
| import android.annotation.TargetApi; |
| import android.hardware.camera2.CameraAccessException; |
| import android.hardware.camera2.CameraCharacteristics; |
| import android.hardware.camera2.CameraManager; |
| import android.os.Build.VERSION_CODES; |
| |
| import com.android.camera.debug.Log; |
| import com.android.camera.debug.Log.Tag; |
| import com.android.camera.device.CameraId; |
| import com.android.camera.one.OneCamera.Facing; |
| import com.android.camera.one.OneCameraAccessException; |
| import com.android.camera.one.OneCameraCharacteristics; |
| import com.android.camera.one.OneCameraManager; |
| import com.android.camera.util.AndroidServices; |
| import com.android.camera.util.ApiHelper; |
| import com.google.common.base.Optional; |
| |
| import javax.annotation.Nonnull; |
| |
| /** |
| * Pick camera ids from a list of devices based on defined characteristics. |
| */ |
| @TargetApi(VERSION_CODES.LOLLIPOP) |
| public class Camera2OneCameraManagerImpl implements OneCameraManager { |
| private static final Tag TAG = new Tag("Camera2OneCamMgr"); |
| /** |
| * Create a new camera2 api hardware manager. |
| */ |
| public static Optional<Camera2OneCameraManagerImpl> create() { |
| if (!ApiHelper.HAS_CAMERA_2_API) { |
| return Optional.absent(); |
| } |
| CameraManager cameraManager; |
| try { |
| cameraManager = AndroidServices.instance().provideCameraManager(); |
| } catch (IllegalStateException ex) { |
| Log.e(TAG, "camera2.CameraManager is not available."); |
| return Optional.absent(); |
| } |
| Camera2OneCameraManagerImpl hardwareManager = |
| new Camera2OneCameraManagerImpl(cameraManager); |
| return Optional.of(hardwareManager); |
| } |
| |
| private final CameraManager mCameraManager; |
| |
| public Camera2OneCameraManagerImpl(CameraManager cameraManger) { |
| mCameraManager = cameraManger; |
| } |
| |
| @Override |
| public boolean hasCamera() { |
| try { |
| String[] ids = mCameraManager.getCameraIdList(); |
| return ids != null && ids.length > 0; |
| } catch (CameraAccessException ex) { |
| Log.e(TAG, "Unable to read camera list.", ex); |
| return false; |
| } |
| } |
| |
| @Override |
| public boolean hasCameraFacing(@Nonnull Facing direction) { |
| return findCameraId(direction) != null; |
| } |
| |
| @Override |
| public CameraId findFirstCamera() { |
| try { |
| String[] ids = mCameraManager.getCameraIdList(); |
| if(ids != null && ids.length > 0) { |
| return CameraId.from(ids[0]); |
| } |
| } catch (CameraAccessException ex) { |
| Log.e(TAG, "Unable to read camera list.", ex); |
| } |
| |
| return null; |
| } |
| |
| @Override |
| public CameraId findFirstCameraFacing(@Nonnull Facing facing) { |
| String cameraId = findCameraId(facing); |
| return (cameraId != null) ? CameraId.from(cameraId) : null; |
| } |
| |
| @Override |
| public OneCameraCharacteristics getOneCameraCharacteristics( |
| @Nonnull CameraId key) |
| throws OneCameraAccessException { |
| return new OneCameraCharacteristicsImpl(getCameraCharacteristics(key)); |
| } |
| |
| public CameraCharacteristics getCameraCharacteristics( |
| @Nonnull CameraId key) |
| throws OneCameraAccessException { |
| try { |
| return mCameraManager.getCameraCharacteristics(key.getValue()); |
| } catch (CameraAccessException ex) { |
| throw new OneCameraAccessException("Unable to get camera characteristics", ex); |
| } |
| } |
| |
| /** Returns the ID of the first camera facing the given direction. */ |
| private String findCameraId(Facing facing) { |
| if (facing == Facing.FRONT) { |
| return findFirstFrontCameraId(); |
| } else { |
| return findFirstBackCameraId(); |
| } |
| } |
| |
| /** Returns the ID of the first back-facing camera. */ |
| private String findFirstBackCameraId() { |
| Log.d(TAG, "Getting First BACK Camera"); |
| String cameraId = findFirstCameraIdFacing(CameraCharacteristics.LENS_FACING_BACK); |
| if (cameraId == null) { |
| Log.w(TAG, "No back-facing camera found."); |
| } |
| return cameraId; |
| } |
| |
| /** Returns the ID of the first front-facing camera. */ |
| private String findFirstFrontCameraId() { |
| Log.d(TAG, "Getting First FRONT Camera"); |
| String cameraId = findFirstCameraIdFacing(CameraCharacteristics.LENS_FACING_FRONT); |
| if (cameraId == null) { |
| Log.w(TAG, "No front-facing camera found."); |
| } |
| return cameraId; |
| } |
| |
| |
| /** Returns the ID of the first camera facing the given direction. */ |
| private String findFirstCameraIdFacing(int facing) { |
| try { |
| String[] cameraIds = mCameraManager.getCameraIdList(); |
| for (String cameraId : cameraIds) { |
| CameraCharacteristics characteristics = mCameraManager |
| .getCameraCharacteristics(cameraId); |
| if (characteristics.get(CameraCharacteristics.LENS_FACING) == facing) { |
| return cameraId; |
| } |
| } |
| } catch (CameraAccessException ex) { |
| Log.w(TAG, "Unable to get camera ID", ex); |
| } |
| return null; |
| } |
| |
| } |