CameraDeviceUserShim.java revision a1d662716b3da384dfe3a758f079e0cbd089784a 
1/*
2 * Copyright (C) 2014 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
17package android.hardware.camera2.legacy;
18
19import android.hardware.Camera;
20import android.hardware.camera2.CameraAccessException;
21import android.hardware.camera2.CaptureRequest;
22import android.hardware.camera2.ICameraDeviceCallbacks;
23import android.hardware.camera2.ICameraDeviceUser;
24import android.hardware.camera2.utils.LongParcelable;
25import android.hardware.camera2.impl.CameraMetadataNative;
26import android.hardware.camera2.utils.CameraBinderDecorator;
27import android.hardware.camera2.utils.CameraRuntimeException;
28import android.os.IBinder;
29import android.os.RemoteException;
30import android.util.Log;
31import android.util.SparseArray;
32import android.view.Surface;
33
34import java.util.ArrayList;
35import java.util.List;
36import java.util.concurrent.atomic.AtomicInteger;
37
38/**
39 * Compatibility implementation of the Camera2 API binder interface.
40 *
41 * <p>
42 * This is intended to be called from the same process as client
43 * {@link android.hardware.camera2.CameraDevice}, and wraps a
44 * {@link android.hardware.camera2.legacy.LegacyCameraDevice} that emulates Camera2 service using
45 * the Camera1 API.
46 * </p>
47 *
48 * <p>
49 * Keep up to date with ICameraDeviceUser.aidl.
50 * </p>
51 */
52public class CameraDeviceUserShim implements ICameraDeviceUser {
53    private static final String TAG = "CameraDeviceUserShim";
54
55    private static final boolean DEBUG = Log.isLoggable(LegacyCameraDevice.DEBUG_PROP, Log.DEBUG);
56
57    private final LegacyCameraDevice mLegacyDevice;
58
59    private final Object mConfigureLock = new Object();
60    private int mSurfaceIdCounter;
61    private boolean mConfiguring;
62    private final SparseArray<Surface> mSurfaces;
63
64    protected CameraDeviceUserShim(int cameraId, LegacyCameraDevice legacyCamera) {
65        mLegacyDevice = legacyCamera;
66        mConfiguring = false;
67        mSurfaces = new SparseArray<Surface>();
68
69        mSurfaceIdCounter = 0;
70    }
71
72    public static CameraDeviceUserShim connectBinderShim(ICameraDeviceCallbacks callbacks,
73                                                         int cameraId) {
74        if (DEBUG) {
75            Log.d(TAG, "Opening shim Camera device");
76        }
77        // TODO: Move open/init into LegacyCameraDevice thread when API is switched to async.
78        Camera legacyCamera = Camera.openUninitialized();
79        int initErrors = legacyCamera.cameraInitUnspecified(cameraId);
80
81        // Check errors old HAL initialization
82        CameraBinderDecorator.throwOnError(initErrors);
83
84        LegacyCameraDevice device = new LegacyCameraDevice(cameraId, legacyCamera, callbacks);
85        return new CameraDeviceUserShim(cameraId, device);
86    }
87
88    @Override
89    public void disconnect() {
90        if (DEBUG) {
91            Log.d(TAG, "disconnect called.");
92        }
93        mLegacyDevice.close();
94    }
95
96    @Override
97    public int submitRequest(CaptureRequest request, boolean streaming,
98                             /*out*/LongParcelable lastFrameNumber) {
99        if (DEBUG) {
100            Log.d(TAG, "submitRequest called.");
101        }
102        synchronized(mConfigureLock) {
103            if (mConfiguring) {
104                Log.e(TAG, "Cannot submit request, configuration change in progress.");
105                return CameraBinderDecorator.INVALID_OPERATION;
106            }
107        }
108        return mLegacyDevice.submitRequest(request, streaming, lastFrameNumber);
109    }
110
111    @Override
112    public int submitRequestList(List<CaptureRequest> request, boolean streaming,
113                                 /*out*/LongParcelable lastFrameNumber) {
114        if (DEBUG) {
115            Log.d(TAG, "submitRequestList called.");
116        }
117        synchronized(mConfigureLock) {
118            if (mConfiguring) {
119                Log.e(TAG, "Cannot submit request, configuration change in progress.");
120                return CameraBinderDecorator.INVALID_OPERATION;
121            }
122        }
123        return mLegacyDevice.submitRequestList(request, streaming, lastFrameNumber);
124    }
125
126    @Override
127    public int cancelRequest(int requestId, /*out*/LongParcelable lastFrameNumber) {
128        if (DEBUG) {
129            Log.d(TAG, "cancelRequest called.");
130        }
131        synchronized(mConfigureLock) {
132            if (mConfiguring) {
133                Log.e(TAG, "Cannot cancel request, configuration change in progress.");
134                return CameraBinderDecorator.INVALID_OPERATION;
135            }
136        }
137        long lastFrame = mLegacyDevice.cancelRequest(requestId);
138        lastFrameNumber.setNumber(lastFrame);
139        return CameraBinderDecorator.NO_ERROR;
140    }
141
142    @Override
143    public int beginConfigure() {
144        if (DEBUG) {
145            Log.d(TAG, "beginConfigure called.");
146        }
147        synchronized(mConfigureLock) {
148            if (mConfiguring) {
149                Log.e(TAG, "Cannot begin configure, configuration change already in progress.");
150                return CameraBinderDecorator.INVALID_OPERATION;
151            }
152            mConfiguring = true;
153        }
154        return CameraBinderDecorator.NO_ERROR;
155    }
156
157    @Override
158    public int endConfigure() {
159        if (DEBUG) {
160            Log.d(TAG, "endConfigure called.");
161        }
162        ArrayList<Surface> surfaces = null;
163        synchronized(mConfigureLock) {
164            if (!mConfiguring) {
165                Log.e(TAG, "Cannot end configure, no configuration change in progress.");
166                return CameraBinderDecorator.INVALID_OPERATION;
167            }
168            int numSurfaces = mSurfaces.size();
169            if (numSurfaces > 0) {
170                for (int i = 0; i < numSurfaces; ++i) {
171                    surfaces.add(mSurfaces.valueAt(i));
172                }
173            }
174            mConfiguring = false;
175        }
176        return mLegacyDevice.configureOutputs(surfaces);
177    }
178
179    @Override
180    public int deleteStream(int streamId) {
181        if (DEBUG) {
182            Log.d(TAG, "deleteStream called.");
183        }
184        synchronized(mConfigureLock) {
185            if (!mConfiguring) {
186                Log.e(TAG, "Cannot delete stream, beginConfigure hasn't been called yet.");
187                return CameraBinderDecorator.INVALID_OPERATION;
188            }
189            int index = mSurfaces.indexOfKey(streamId);
190            if (index < 0) {
191                Log.e(TAG, "Cannot delete stream, stream id " + streamId + " doesn't exist.");
192                return CameraBinderDecorator.BAD_VALUE;
193            }
194            mSurfaces.removeAt(index);
195        }
196        return CameraBinderDecorator.NO_ERROR;
197    }
198
199    @Override
200    public int createStream(int width, int height, int format, Surface surface) {
201        if (DEBUG) {
202            Log.d(TAG, "createStream called.");
203        }
204        synchronized(mConfigureLock) {
205            if (!mConfiguring) {
206                Log.e(TAG, "Cannot create stream, beginConfigure hasn't been called yet.");
207                return CameraBinderDecorator.INVALID_OPERATION;
208            }
209            int id = ++mSurfaceIdCounter;
210            mSurfaces.put(id, surface);
211            return id;
212        }
213    }
214
215    @Override
216    public int createDefaultRequest(int templateId, /*out*/CameraMetadataNative request) {
217        if (DEBUG) {
218            Log.d(TAG, "createDefaultRequest called.");
219        }
220        // TODO: implement createDefaultRequest.
221        Log.e(TAG, "createDefaultRequest unimplemented.");
222        return CameraBinderDecorator.NO_ERROR;
223    }
224
225    @Override
226    public int getCameraInfo(/*out*/CameraMetadataNative info) {
227        if (DEBUG) {
228            Log.d(TAG, "getCameraInfo called.");
229        }
230        // TODO: implement getCameraInfo.
231        Log.e(TAG, "getCameraInfo unimplemented.");
232        return CameraBinderDecorator.NO_ERROR;
233    }
234
235    @Override
236    public int waitUntilIdle() throws RemoteException {
237        if (DEBUG) {
238            Log.d(TAG, "waitUntilIdle called.");
239        }
240        synchronized(mConfigureLock) {
241            if (mConfiguring) {
242                Log.e(TAG, "Cannot wait until idle, configuration change in progress.");
243                return CameraBinderDecorator.INVALID_OPERATION;
244            }
245        }
246        mLegacyDevice.waitUntilIdle();
247        return CameraBinderDecorator.NO_ERROR;
248    }
249
250    @Override
251    public int flush(/*out*/LongParcelable lastFrameNumber) {
252        if (DEBUG) {
253            Log.d(TAG, "flush called.");
254        }
255        synchronized(mConfigureLock) {
256            if (mConfiguring) {
257                Log.e(TAG, "Cannot flush, configuration change in progress.");
258                return CameraBinderDecorator.INVALID_OPERATION;
259            }
260        }
261        // TODO: implement flush.
262        return CameraBinderDecorator.NO_ERROR;
263    }
264
265    @Override
266    public IBinder asBinder() {
267        // This is solely intended to be used for in-process binding.
268        return null;
269    }
270}
271