3 ** Copyright (C) 2013, The Android Open Source Project
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
9 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
18 //#define LOG_NDEBUG 0
19 #define LOG_TAG "CameraBase"
20 #include <utils/Log.h>
21 #include <utils/threads.h>
22 #include <utils/Mutex.h>
23 #include <cutils/properties.h>
25 #include <android/hardware/ICameraService.h>
27 #include <binder/IPCThreadState.h>
28 #include <binder/IServiceManager.h>
29 #include <binder/IMemory.h>
31 #include <camera/CameraBase.h>
33 // needed to instantiate
34 #include <camera/Camera.h>
36 #include <system/camera_metadata.h>
42 status_t CameraInfo::writeToParcel(android::Parcel* parcel) const {
44 res = parcel->writeInt32(facing);
45 if (res != OK) return res;
46 res = parcel->writeInt32(orientation);
50 status_t CameraInfo::readFromParcel(const android::Parcel* parcel) {
52 res = parcel->readInt32(&facing);
53 if (res != OK) return res;
54 res = parcel->readInt32(&orientation);
58 status_t CameraStatus::writeToParcel(android::Parcel* parcel) const {
59 auto res = parcel->writeString16(String16(cameraId));
60 if (res != OK) return res;
62 res = parcel->writeInt32(status);
66 status_t CameraStatus::readFromParcel(const android::Parcel* parcel) {
67 String16 tempCameraId;
68 auto res = parcel->readString16(&tempCameraId);
69 if (res != OK) return res;
70 cameraId = String8(tempCameraId);
72 res = parcel->readInt32(&status);
76 } // namespace hardware
79 sp<::android::hardware::ICameraService> gCameraService;
80 const int kCameraServicePollDelay = 500000; // 0.5s
81 const char* kCameraServiceName = "media.camera";
85 class DeathNotifier : public IBinder::DeathRecipient
91 virtual void binderDied(const wp<IBinder>& /*who*/) {
93 Mutex::Autolock _l(gLock);
94 gCameraService.clear();
95 ALOGW("Camera service died!");
99 sp<DeathNotifier> gDeathNotifier;
100 }; // namespace anonymous
102 ///////////////////////////////////////////////////////////
103 // CameraBase definition
104 ///////////////////////////////////////////////////////////
106 // establish binder interface to camera service
107 template <typename TCam, typename TCamTraits>
108 const sp<::android::hardware::ICameraService> CameraBase<TCam, TCamTraits>::getCameraService()
110 Mutex::Autolock _l(gLock);
111 if (gCameraService.get() == 0) {
112 char value[PROPERTY_VALUE_MAX];
113 property_get("config.disable_cameraservice", value, "0");
114 if (strncmp(value, "0", 2) != 0 && strncasecmp(value, "false", 6) != 0) {
115 return gCameraService;
118 sp<IServiceManager> sm = defaultServiceManager();
121 binder = sm->getService(String16(kCameraServiceName));
125 ALOGW("CameraService not published, waiting...");
126 usleep(kCameraServicePollDelay);
128 if (gDeathNotifier == NULL) {
129 gDeathNotifier = new DeathNotifier();
131 binder->linkToDeath(gDeathNotifier);
132 gCameraService = interface_cast<::android::hardware::ICameraService>(binder);
134 ALOGE_IF(gCameraService == 0, "no CameraService!?");
135 return gCameraService;
138 template <typename TCam, typename TCamTraits>
139 sp<TCam> CameraBase<TCam, TCamTraits>::connect(int cameraId,
140 const String16& clientPackageName,
141 int clientUid, int clientPid)
143 ALOGV("%s: connect", __FUNCTION__);
144 sp<TCam> c = new TCam(cameraId);
145 sp<TCamCallbacks> cl = c;
146 const sp<::android::hardware::ICameraService> cs = getCameraService();
150 TCamConnectService fnConnectService = TCamTraits::fnConnectService;
151 ret = (cs.get()->*fnConnectService)(cl, cameraId, clientPackageName, clientUid,
152 clientPid, /*out*/ &c->mCamera);
154 if (ret.isOk() && c->mCamera != nullptr) {
155 IInterface::asBinder(c->mCamera)->linkToDeath(c);
156 c->mStatus = NO_ERROR;
158 ALOGW("An error occurred while connecting to camera %d: %s", cameraId,
159 (cs == nullptr) ? "Service not available" : ret.toString8().string());
165 template <typename TCam, typename TCamTraits>
166 void CameraBase<TCam, TCamTraits>::disconnect()
168 ALOGV("%s: disconnect", __FUNCTION__);
170 mCamera->disconnect();
171 IInterface::asBinder(mCamera)->unlinkToDeath(this);
174 ALOGV("%s: disconnect (done)", __FUNCTION__);
177 template <typename TCam, typename TCamTraits>
178 CameraBase<TCam, TCamTraits>::CameraBase(int cameraId) :
179 mStatus(UNKNOWN_ERROR),
184 template <typename TCam, typename TCamTraits>
185 CameraBase<TCam, TCamTraits>::~CameraBase()
189 template <typename TCam, typename TCamTraits>
190 sp<typename TCamTraits::TCamUser> CameraBase<TCam, TCamTraits>::remote()
195 template <typename TCam, typename TCamTraits>
196 status_t CameraBase<TCam, TCamTraits>::getStatus()
201 template <typename TCam, typename TCamTraits>
202 void CameraBase<TCam, TCamTraits>::binderDied(const wp<IBinder>& /*who*/) {
203 ALOGW("mediaserver's remote binder Camera object died");
204 notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_SERVER_DIED, /*ext2*/0);
207 template <typename TCam, typename TCamTraits>
208 void CameraBase<TCam, TCamTraits>::setListener(const sp<TCamListener>& listener)
210 Mutex::Autolock _l(mLock);
211 mListener = listener;
214 // callback from camera service
215 template <typename TCam, typename TCamTraits>
216 void CameraBase<TCam, TCamTraits>::notifyCallback(int32_t msgType,
220 sp<TCamListener> listener;
222 Mutex::Autolock _l(mLock);
223 listener = mListener;
225 if (listener != NULL) {
226 listener->notify(msgType, ext1, ext2);
230 template <typename TCam, typename TCamTraits>
231 int CameraBase<TCam, TCamTraits>::getNumberOfCameras() {
232 const sp<::android::hardware::ICameraService> cs = getCameraService();
235 // as required by the public Java APIs
239 binder::Status res = cs->getNumberOfCameras(
240 ::android::hardware::ICameraService::CAMERA_TYPE_BACKWARD_COMPATIBLE,
243 ALOGE("Error reading number of cameras: %s",
244 res.toString8().string());
250 // this can be in BaseCamera but it should be an instance method
251 template <typename TCam, typename TCamTraits>
252 status_t CameraBase<TCam, TCamTraits>::getCameraInfo(int cameraId,
253 struct hardware::CameraInfo* cameraInfo) {
254 const sp<::android::hardware::ICameraService> cs = getCameraService();
255 if (cs == 0) return UNKNOWN_ERROR;
256 binder::Status res = cs->getCameraInfo(cameraId, cameraInfo);
257 return res.isOk() ? OK : res.serviceSpecificErrorCode();
260 template class CameraBase<Camera>;
262 } // namespace android