CameraDeviceUserShim.java revision 3e4fed203fe7c945c53c6d6bb9f160932a1d15b3 
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.cameraInit(cameraId);
80        // Check errors old HAL initialization
81        if (Camera.checkInitErrors(initErrors)) {
82            // TODO: Map over old camera error codes.  This likely involves improving the error
83            // reporting in the HAL1 connect path.
84            throw new CameraRuntimeException(CameraAccessException.CAMERA_DISCONNECTED);
85        }
86        LegacyCameraDevice device = new LegacyCameraDevice(cameraId, legacyCamera, callbacks);
87        return new CameraDeviceUserShim(cameraId, device);
88    }
89
90    @Override
91    public void disconnect() {
92        if (DEBUG) {
93            Log.d(TAG, "disconnect called.");
94        }
95        mLegacyDevice.close();
96    }
97
98    @Override
99    public int submitRequest(CaptureRequest request, boolean streaming,
100                             /*out*/LongParcelable lastFrameNumber) {
101        if (DEBUG) {
102            Log.d(TAG, "submitRequest called.");
103        }
104        synchronized(mConfigureLock) {
105            if (mConfiguring) {
106                Log.e(TAG, "Cannot submit request, configuration change in progress.");
107                return CameraBinderDecorator.INVALID_OPERATION;
108            }
109        }
110        return mLegacyDevice.submitRequest(request, streaming, lastFrameNumber);
111    }
112
113    @Override
114    public int submitRequestList(List<CaptureRequest> request, boolean streaming,
115                                 /*out*/LongParcelable lastFrameNumber) {
116        if (DEBUG) {
117            Log.d(TAG, "submitRequestList called.");
118        }
119        synchronized(mConfigureLock) {
120            if (mConfiguring) {
121                Log.e(TAG, "Cannot submit request, configuration change in progress.");
122                return CameraBinderDecorator.INVALID_OPERATION;
123            }
124        }
125        return mLegacyDevice.submitRequestList(request, streaming, lastFrameNumber);
126    }
127
128    @Override
129    public int cancelRequest(int requestId, /*out*/LongParcelable lastFrameNumber) {
130        if (DEBUG) {
131            Log.d(TAG, "cancelRequest called.");
132        }
133        synchronized(mConfigureLock) {
134            if (mConfiguring) {
135                Log.e(TAG, "Cannot cancel request, configuration change in progress.");
136                return CameraBinderDecorator.INVALID_OPERATION;
137            }
138        }
139        long lastFrame = mLegacyDevice.cancelRequest(requestId);
140        lastFrameNumber.setNumber(lastFrame);
141        return CameraBinderDecorator.NO_ERROR;
142    }
143
144    @Override
145    public int beginConfigure() {
146        if (DEBUG) {
147            Log.d(TAG, "beginConfigure called.");
148        }
149        synchronized(mConfigureLock) {
150            if (mConfiguring) {
151                Log.e(TAG, "Cannot begin configure, configuration change already in progress.");
152                return CameraBinderDecorator.INVALID_OPERATION;
153            }
154            mConfiguring = true;
155        }
156        return CameraBinderDecorator.NO_ERROR;
157    }
158
159    @Override
160    public int endConfigure() {
161        if (DEBUG) {
162            Log.d(TAG, "endConfigure called.");
163        }
164        ArrayList<Surface> surfaces = null;
165        synchronized(mConfigureLock) {
166            if (!mConfiguring) {
167                Log.e(TAG, "Cannot end configure, no configuration change in progress.");
168                return CameraBinderDecorator.INVALID_OPERATION;
169            }
170            int numSurfaces = mSurfaces.size();
171            if (numSurfaces > 0) {
172                for (int i = 0; i < numSurfaces; ++i) {
173                    surfaces.add(mSurfaces.valueAt(i));
174                }
175            }
176            mConfiguring = false;
177        }
178        return mLegacyDevice.configureOutputs(surfaces);
179    }
180
181    @Override
182    public int deleteStream(int streamId) {
183        if (DEBUG) {
184            Log.d(TAG, "deleteStream called.");
185        }
186        synchronized(mConfigureLock) {
187            if (!mConfiguring) {
188                Log.e(TAG, "Cannot delete stream, beginConfigure hasn't been called yet.");
189                return CameraBinderDecorator.INVALID_OPERATION;
190            }
191            int index = mSurfaces.indexOfKey(streamId);
192            if (index < 0) {
193                Log.e(TAG, "Cannot delete stream, stream id " + streamId + " doesn't exist.");
194                return CameraBinderDecorator.BAD_VALUE;
195            }
196            mSurfaces.removeAt(index);
197        }
198        return CameraBinderDecorator.NO_ERROR;
199    }
200
201    @Override
202    public int createStream(int width, int height, int format, Surface surface) {
203        if (DEBUG) {
204            Log.d(TAG, "createStream called.");
205        }
206        synchronized(mConfigureLock) {
207            if (!mConfiguring) {
208                Log.e(TAG, "Cannot create stream, beginConfigure hasn't been called yet.");
209                return CameraBinderDecorator.INVALID_OPERATION;
210            }
211            int id = ++mSurfaceIdCounter;
212            mSurfaces.put(id, surface);
213            return id;
214        }
215    }
216
217    @Override
218    public int createDefaultRequest(int templateId, /*out*/CameraMetadataNative request) {
219        if (DEBUG) {
220            Log.d(TAG, "createDefaultRequest called.");
221        }
222        // TODO: implement createDefaultRequest.
223        Log.e(TAG, "createDefaultRequest unimplemented.");
224        return CameraBinderDecorator.NO_ERROR;
225    }
226
227    @Override
228    public int getCameraInfo(/*out*/CameraMetadataNative info) {
229        if (DEBUG) {
230            Log.d(TAG, "getCameraInfo called.");
231        }
232        // TODO: implement getCameraInfo.
233        Log.e(TAG, "getCameraInfo unimplemented.");
234        return CameraBinderDecorator.NO_ERROR;
235    }
236
237    @Override
238    public int waitUntilIdle() throws RemoteException {
239        if (DEBUG) {
240            Log.d(TAG, "waitUntilIdle called.");
241        }
242        synchronized(mConfigureLock) {
243            if (mConfiguring) {
244                Log.e(TAG, "Cannot wait until idle, configuration change in progress.");
245                return CameraBinderDecorator.INVALID_OPERATION;
246            }
247        }
248        mLegacyDevice.waitUntilIdle();
249        return CameraBinderDecorator.NO_ERROR;
250    }
251
252    @Override
253    public int flush(/*out*/LongParcelable lastFrameNumber) {
254        if (DEBUG) {
255            Log.d(TAG, "flush called.");
256        }
257        synchronized(mConfigureLock) {
258            if (mConfiguring) {
259                Log.e(TAG, "Cannot flush, configuration change in progress.");
260                return CameraBinderDecorator.INVALID_OPERATION;
261            }
262        }
263        // TODO: implement flush.
264        return CameraBinderDecorator.NO_ERROR;
265    }
266
267    @Override
268    public IBinder asBinder() {
269        // This is solely intended to be used for in-process binding.
270        return null;
271    }
272}
273