Camera2ClientBase.cpp revision 32fa6d0e65dbf956e253a1006e9419dce2fe75c9 
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#define LOG_TAG "Camera2ClientBase"
18#define ATRACE_TAG ATRACE_TAG_CAMERA
19//#define LOG_NDEBUG 0
20
21#include <inttypes.h>
22
23#include <utils/Log.h>
24#include <utils/Trace.h>
25
26#include <cutils/properties.h>
27#include <gui/Surface.h>
28#include <gui/Surface.h>
29
30#include "common/Camera2ClientBase.h"
31
32#include "api2/CameraDeviceClient.h"
33
34#include "CameraDeviceFactory.h"
35
36namespace android {
37using namespace camera2;
38
39static int getCallingPid() {
40    return IPCThreadState::self()->getCallingPid();
41}
42
43// Interface used by CameraService
44
45template <typename TClientBase>
46Camera2ClientBase<TClientBase>::Camera2ClientBase(
47        const sp<CameraService>& cameraService,
48        const sp<TCamCallbacks>& remoteCallback,
49        const String16& clientPackageName,
50        int cameraId,
51        int cameraFacing,
52        int clientPid,
53        uid_t clientUid,
54        int servicePid):
55        TClientBase(cameraService, remoteCallback, clientPackageName,
56                cameraId, cameraFacing, clientPid, clientUid, servicePid),
57        mSharedCameraCallbacks(remoteCallback),
58        mDeviceVersion(cameraService->getDeviceVersion(cameraId))
59{
60    ALOGI("Camera %d: Opened. Client: %s (PID %d, UID %d)", cameraId,
61            String8(clientPackageName).string(), clientPid, clientUid);
62
63    mInitialClientPid = clientPid;
64    mDevice = CameraDeviceFactory::createDevice(cameraId);
65    LOG_ALWAYS_FATAL_IF(mDevice == 0, "Device should never be NULL here.");
66}
67
68template <typename TClientBase>
69status_t Camera2ClientBase<TClientBase>::checkPid(const char* checkLocation)
70        const {
71
72    int callingPid = getCallingPid();
73    if (callingPid == TClientBase::mClientPid) return NO_ERROR;
74
75    ALOGE("%s: attempt to use a locked camera from a different process"
76            " (old pid %d, new pid %d)", checkLocation, TClientBase::mClientPid, callingPid);
77    return PERMISSION_DENIED;
78}
79
80template <typename TClientBase>
81status_t Camera2ClientBase<TClientBase>::initialize(CameraModule *module) {
82    ATRACE_CALL();
83    ALOGV("%s: Initializing client for camera %d", __FUNCTION__,
84          TClientBase::mCameraId);
85    status_t res;
86
87    // Verify ops permissions
88    res = TClientBase::startCameraOps();
89    if (res != OK) {
90        return res;
91    }
92
93    if (mDevice == NULL) {
94        ALOGE("%s: Camera %d: No device connected",
95                __FUNCTION__, TClientBase::mCameraId);
96        return NO_INIT;
97    }
98
99    res = mDevice->initialize(module);
100    if (res != OK) {
101        ALOGE("%s: Camera %d: unable to initialize device: %s (%d)",
102                __FUNCTION__, TClientBase::mCameraId, strerror(-res), res);
103        return res;
104    }
105
106    res = mDevice->setNotifyCallback(this);
107
108    return OK;
109}
110
111template <typename TClientBase>
112Camera2ClientBase<TClientBase>::~Camera2ClientBase() {
113    ATRACE_CALL();
114
115    TClientBase::mDestructionStarted = true;
116
117    disconnect();
118
119    ALOGI("Closed Camera %d. Client was: %s (PID %d, UID %u)",
120            TClientBase::mCameraId,
121            String8(TClientBase::mOpPackageName).string(),
122            mInitialClientPid, TClientBase::mClientUid);
123}
124
125template <typename TClientBase>
126status_t Camera2ClientBase<TClientBase>::dump(int fd,
127                                              const Vector<String16>& args) {
128    String8 result;
129    result.appendFormat("Camera2ClientBase[%d] (%p) PID: %d, dump:\n",
130            TClientBase::mCameraId,
131            (TClientBase::getRemoteCallback() != NULL ?
132                    IInterface::asBinder(TClientBase::getRemoteCallback()).get() : NULL),
133            TClientBase::mClientPid);
134    result.append("  State: ");
135
136    write(fd, result.string(), result.size());
137    // TODO: print dynamic/request section from most recent requests
138
139    return dumpDevice(fd, args);
140}
141
142template <typename TClientBase>
143status_t Camera2ClientBase<TClientBase>::dumpDevice(
144                                                int fd,
145                                                const Vector<String16>& args) {
146    String8 result;
147
148    result = "  Device dump:\n";
149    write(fd, result.string(), result.size());
150
151    if (!mDevice.get()) {
152        result = "  *** Device is detached\n";
153        write(fd, result.string(), result.size());
154        return NO_ERROR;
155    }
156
157    status_t res = mDevice->dump(fd, args);
158    if (res != OK) {
159        result = String8::format("   Error dumping device: %s (%d)",
160                strerror(-res), res);
161        write(fd, result.string(), result.size());
162    }
163
164    return NO_ERROR;
165}
166
167// ICameraClient2BaseUser interface
168
169
170template <typename TClientBase>
171void Camera2ClientBase<TClientBase>::disconnect() {
172    ATRACE_CALL();
173    Mutex::Autolock icl(mBinderSerializationLock);
174
175    // Allow both client and the media server to disconnect at all times
176    int callingPid = getCallingPid();
177    if (callingPid != TClientBase::mClientPid &&
178        callingPid != TClientBase::mServicePid) return;
179
180    ALOGV("Camera %d: Shutting down", TClientBase::mCameraId);
181
182    detachDevice();
183
184    CameraService::BasicClient::disconnect();
185
186    ALOGV("Camera %d: Shut down complete complete", TClientBase::mCameraId);
187}
188
189template <typename TClientBase>
190void Camera2ClientBase<TClientBase>::detachDevice() {
191    if (mDevice == 0) return;
192    mDevice->disconnect();
193
194    mDevice.clear();
195
196    ALOGV("Camera %d: Detach complete", TClientBase::mCameraId);
197}
198
199template <typename TClientBase>
200status_t Camera2ClientBase<TClientBase>::connect(
201        const sp<TCamCallbacks>& client) {
202    ATRACE_CALL();
203    ALOGV("%s: E", __FUNCTION__);
204    Mutex::Autolock icl(mBinderSerializationLock);
205
206    if (TClientBase::mClientPid != 0 &&
207        getCallingPid() != TClientBase::mClientPid) {
208
209        ALOGE("%s: Camera %d: Connection attempt from pid %d; "
210                "current locked to pid %d",
211                __FUNCTION__,
212                TClientBase::mCameraId,
213                getCallingPid(),
214                TClientBase::mClientPid);
215        return BAD_VALUE;
216    }
217
218    TClientBase::mClientPid = getCallingPid();
219
220    TClientBase::mRemoteCallback = client;
221    mSharedCameraCallbacks = client;
222
223    return OK;
224}
225
226/** Device-related methods */
227
228template <typename TClientBase>
229void Camera2ClientBase<TClientBase>::notifyError(
230        ICameraDeviceCallbacks::CameraErrorCode errorCode,
231        const CaptureResultExtras& resultExtras) {
232    ALOGE("Error condition %d reported by HAL, requestId %" PRId32, errorCode,
233          resultExtras.requestId);
234}
235
236template <typename TClientBase>
237void Camera2ClientBase<TClientBase>::notifyIdle() {
238    ALOGV("Camera device is now idle");
239}
240
241template <typename TClientBase>
242void Camera2ClientBase<TClientBase>::notifyShutter(const CaptureResultExtras& resultExtras,
243                                                   nsecs_t timestamp) {
244    (void)resultExtras;
245    (void)timestamp;
246
247    ALOGV("%s: Shutter notification for request id %" PRId32 " at time %" PRId64,
248            __FUNCTION__, resultExtras.requestId, timestamp);
249}
250
251template <typename TClientBase>
252void Camera2ClientBase<TClientBase>::notifyAutoFocus(uint8_t newState,
253                                                     int triggerId) {
254    (void)newState;
255    (void)triggerId;
256
257    ALOGV("%s: Autofocus state now %d, last trigger %d",
258          __FUNCTION__, newState, triggerId);
259
260}
261
262template <typename TClientBase>
263void Camera2ClientBase<TClientBase>::notifyAutoExposure(uint8_t newState,
264                                                        int triggerId) {
265    (void)newState;
266    (void)triggerId;
267
268    ALOGV("%s: Autoexposure state now %d, last trigger %d",
269            __FUNCTION__, newState, triggerId);
270}
271
272template <typename TClientBase>
273void Camera2ClientBase<TClientBase>::notifyAutoWhitebalance(uint8_t newState,
274                                                            int triggerId) {
275    (void)newState;
276    (void)triggerId;
277
278    ALOGV("%s: Auto-whitebalance state now %d, last trigger %d",
279            __FUNCTION__, newState, triggerId);
280}
281
282template <typename TClientBase>
283void Camera2ClientBase<TClientBase>::notifyPrepared(int streamId) {
284    (void)streamId;
285
286    ALOGV("%s: Stream %d now prepared",
287            __FUNCTION__, streamId);
288}
289
290template <typename TClientBase>
291int Camera2ClientBase<TClientBase>::getCameraId() const {
292    return TClientBase::mCameraId;
293}
294
295template <typename TClientBase>
296int Camera2ClientBase<TClientBase>::getCameraDeviceVersion() const {
297    return mDeviceVersion;
298}
299
300template <typename TClientBase>
301const sp<CameraDeviceBase>& Camera2ClientBase<TClientBase>::getCameraDevice() {
302    return mDevice;
303}
304
305template <typename TClientBase>
306const sp<CameraService>& Camera2ClientBase<TClientBase>::getCameraService() {
307    return TClientBase::mCameraService;
308}
309
310template <typename TClientBase>
311Camera2ClientBase<TClientBase>::SharedCameraCallbacks::Lock::Lock(
312        SharedCameraCallbacks &client) :
313
314        mRemoteCallback(client.mRemoteCallback),
315        mSharedClient(client) {
316
317    mSharedClient.mRemoteCallbackLock.lock();
318}
319
320template <typename TClientBase>
321Camera2ClientBase<TClientBase>::SharedCameraCallbacks::Lock::~Lock() {
322    mSharedClient.mRemoteCallbackLock.unlock();
323}
324
325template <typename TClientBase>
326Camera2ClientBase<TClientBase>::SharedCameraCallbacks::SharedCameraCallbacks(
327        const sp<TCamCallbacks>&client) :
328
329        mRemoteCallback(client) {
330}
331
332template <typename TClientBase>
333typename Camera2ClientBase<TClientBase>::SharedCameraCallbacks&
334Camera2ClientBase<TClientBase>::SharedCameraCallbacks::operator=(
335        const sp<TCamCallbacks>&client) {
336
337    Mutex::Autolock l(mRemoteCallbackLock);
338    mRemoteCallback = client;
339    return *this;
340}
341
342template <typename TClientBase>
343void Camera2ClientBase<TClientBase>::SharedCameraCallbacks::clear() {
344    Mutex::Autolock l(mRemoteCallbackLock);
345    mRemoteCallback.clear();
346}
347
348template class Camera2ClientBase<CameraService::Client>;
349template class Camera2ClientBase<CameraDeviceClientBase>;
350
351} // namespace android
352