Angus Kong | 20fad24 | 2013-11-11 18:23:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.camera.app; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.hardware.Camera; |
| 21 | import android.os.Handler; |
| 22 | import android.util.Log; |
| 23 | |
| 24 | import com.android.camera.CameraDisabledException; |
| 25 | import com.android.camera.util.CameraUtil; |
| 26 | |
| 27 | /** |
| 28 | * A class which implements {@link com.android.camera.app.CameraProvider} used |
| 29 | * by {@link com.android.camera.CameraActivity}. |
| 30 | * TODO: Make this class package private. |
| 31 | */ |
| 32 | public class CameraController implements CameraManager.CameraOpenCallback, CameraProvider { |
| 33 | private final String TAG = "CameraController"; |
Sascha Haeberling | 846d3ab | 2014-02-04 12:48:55 +0100 | [diff] [blame^] | 34 | private final Context mContext; |
Angus Kong | 20fad24 | 2013-11-11 18:23:46 -0800 | [diff] [blame] | 35 | private CameraManager.CameraOpenCallback mCallbackReceiver; |
Sascha Haeberling | 846d3ab | 2014-02-04 12:48:55 +0100 | [diff] [blame^] | 36 | private final Handler mCallbackHandler; |
Angus Kong | 20fad24 | 2013-11-11 18:23:46 -0800 | [diff] [blame] | 37 | private final CameraManager mCameraManager; |
| 38 | private final Camera.CameraInfo[] mCameraInfos; |
| 39 | private final int mNumberOfCameras; |
| 40 | private final int mFirstBackCameraId; |
| 41 | private final int mFirstFrontCameraId; |
| 42 | |
| 43 | private CameraManager.CameraProxy mCameraProxy; |
| 44 | private int mRequestingCameraId = -1; |
| 45 | |
| 46 | /** |
| 47 | * Constructor. |
| 48 | * |
| 49 | * @param context The {@link android.content.Context} used to check if the |
| 50 | * camera is disabled. |
| 51 | * @param handler The {@link android.os.Handler} to post the camera |
| 52 | * callbacks to. |
| 53 | * @param cameraManager Used for camera open/close. |
| 54 | */ |
| 55 | public CameraController(Context context, CameraManager.CameraOpenCallback callbackReceiver, |
| 56 | Handler handler, CameraManager cameraManager) { |
| 57 | mContext = context; |
| 58 | mCallbackReceiver = callbackReceiver; |
| 59 | mCallbackHandler = handler; |
| 60 | mCameraManager = cameraManager; |
| 61 | mNumberOfCameras = Camera.getNumberOfCameras(); |
| 62 | mCameraInfos = new Camera.CameraInfo[mNumberOfCameras]; |
| 63 | for (int i = 0; i < mNumberOfCameras; i++) { |
| 64 | mCameraInfos[i] = new Camera.CameraInfo(); |
| 65 | Camera.getCameraInfo(i, mCameraInfos[i]); |
| 66 | } |
| 67 | |
| 68 | int firstFront = -1; |
| 69 | int firstBack = -1; |
| 70 | // Get the first (smallest) back and first front camera id. |
Angus Kong | 18500a4 | 2013-11-21 18:14:14 -0800 | [diff] [blame] | 71 | for (int i = mNumberOfCameras - 1; i >= 0; i--) { |
Angus Kong | 20fad24 | 2013-11-11 18:23:46 -0800 | [diff] [blame] | 72 | if (mCameraInfos[i].facing == Camera.CameraInfo.CAMERA_FACING_BACK) { |
| 73 | firstBack = i; |
| 74 | } else { |
| 75 | if (mCameraInfos[i].facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { |
| 76 | firstFront = i; |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | mFirstBackCameraId = firstBack; |
| 81 | mFirstFrontCameraId = firstFront; |
| 82 | } |
| 83 | |
| 84 | @Override |
| 85 | public Camera.CameraInfo[] getCameraInfo() { |
| 86 | return mCameraInfos; |
| 87 | } |
| 88 | |
| 89 | @Override |
| 90 | public int getNumberOfCameras() { |
| 91 | return mNumberOfCameras; |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | public int getFirstBackCameraId() { |
| 96 | return mFirstBackCameraId; |
| 97 | } |
| 98 | |
| 99 | @Override |
| 100 | public int getFirstFrontCameraId() { |
| 101 | return mFirstFrontCameraId; |
| 102 | } |
| 103 | |
| 104 | @Override |
Angus Kong | 39b460b | 2013-12-06 20:55:36 -0800 | [diff] [blame] | 105 | public boolean isFrontFacingCamera(int id) { |
| 106 | if (id >= mCameraInfos.length || mCameraInfos[id] == null) { |
| 107 | Log.e(TAG, "Camera info not available:" + id); |
| 108 | return false; |
| 109 | } |
| 110 | return (mCameraInfos[id].facing == Camera.CameraInfo.CAMERA_FACING_FRONT); |
| 111 | } |
| 112 | |
| 113 | @Override |
| 114 | public boolean isBackFacingCamera(int id) { |
| 115 | if (id >= mCameraInfos.length || mCameraInfos[id] == null) { |
| 116 | Log.e(TAG, "Camera info not available:" + id); |
| 117 | return false; |
| 118 | } |
| 119 | return (mCameraInfos[id].facing == Camera.CameraInfo.CAMERA_FACING_BACK); |
| 120 | } |
| 121 | |
| 122 | @Override |
Angus Kong | 20fad24 | 2013-11-11 18:23:46 -0800 | [diff] [blame] | 123 | public void onCameraOpened(CameraManager.CameraProxy camera) { |
| 124 | mRequestingCameraId = -1; |
| 125 | mCameraProxy = camera; |
| 126 | mCallbackReceiver.onCameraOpened(camera); |
| 127 | } |
| 128 | |
| 129 | @Override |
| 130 | public void onCameraDisabled(int cameraId) { |
| 131 | mCallbackReceiver.onCameraDisabled(cameraId); |
| 132 | } |
| 133 | |
| 134 | @Override |
| 135 | public void onDeviceOpenFailure(int cameraId) { |
| 136 | mCallbackReceiver.onDeviceOpenFailure(cameraId); |
| 137 | } |
| 138 | |
| 139 | @Override |
| 140 | public void onReconnectionFailure(CameraManager mgr) { |
| 141 | mCallbackReceiver.onReconnectionFailure(mgr); |
| 142 | } |
| 143 | |
| 144 | @Override |
| 145 | public void requestCamera(int id) { |
| 146 | // Double open is avoided. |
| 147 | if (mRequestingCameraId == id) { |
| 148 | return; |
| 149 | } |
| 150 | mRequestingCameraId = id; |
| 151 | if (mCameraProxy == null) { |
| 152 | // No camera yet. |
| 153 | checkAndOpenCamera(mContext, mCameraManager, id, mCallbackHandler, this); |
| 154 | } else if (mCameraProxy.getCameraId() != id) { |
| 155 | // Already has another camera opened. |
| 156 | mCameraProxy.release(false); |
| 157 | mCameraProxy = null; |
| 158 | checkAndOpenCamera(mContext, mCameraManager, id, mCallbackHandler, this); |
| 159 | } else { |
| 160 | // The same camera, just do a reconnect. |
| 161 | mCameraProxy.reconnect(mCallbackHandler, this); |
| 162 | mCameraProxy = null; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | @Override |
| 167 | public void releaseCamera(int id) { |
| 168 | if (mCameraProxy.getCameraId() != id) { |
| 169 | throw new IllegalStateException("Trying to release an unopened camera."); |
| 170 | } |
| 171 | if (mRequestingCameraId != -1) { |
| 172 | mRequestingCameraId = -1; |
| 173 | } |
| 174 | } |
| 175 | |
Sascha Haeberling | 846d3ab | 2014-02-04 12:48:55 +0100 | [diff] [blame^] | 176 | public void removeCallbackReceiver() { |
| 177 | mCallbackReceiver = null; |
| 178 | } |
| 179 | |
Angus Kong | 20fad24 | 2013-11-11 18:23:46 -0800 | [diff] [blame] | 180 | /** |
| 181 | * Closes the opened camera device. |
| 182 | * TODO: Make this method package private. |
| 183 | */ |
| 184 | public void closeCamera() { |
| 185 | Log.v(TAG, "closing camera"); |
| 186 | if (mCameraProxy == null) { |
| 187 | return; |
| 188 | } |
| 189 | mCameraProxy.release(true); |
| 190 | mCameraProxy = null; |
| 191 | mRequestingCameraId = -1; |
| 192 | } |
| 193 | |
| 194 | private static void checkAndOpenCamera(Context context, CameraManager cameraManager, |
| 195 | final int cameraId, Handler handler, final CameraManager.CameraOpenCallback cb) { |
| 196 | try { |
| 197 | CameraUtil.throwIfCameraDisabled(context); |
| 198 | cameraManager.cameraOpen(handler, cameraId, cb); |
| 199 | } catch (CameraDisabledException ex) { |
| 200 | handler.post(new Runnable() { |
| 201 | @Override |
| 202 | public void run() { |
| 203 | cb.onCameraDisabled(cameraId); |
| 204 | } |
| 205 | }); |
| 206 | } |
| 207 | } |
Doris Liu | 4d4a4bc | 2013-12-19 18:55:54 -0800 | [diff] [blame] | 208 | |
| 209 | public void setOneShotPreviewCallback(Handler handler, |
| 210 | CameraManager.CameraPreviewDataCallback cb) { |
| 211 | mCameraProxy.setOneShotPreviewCallback(handler, cb); |
| 212 | } |
Angus Kong | 20fad24 | 2013-11-11 18:23:46 -0800 | [diff] [blame] | 213 | } |