Camera2ClientBase.cpp revision b9d2f3333369183344aa89c7be1e643a44296d48 
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(camera_module_t *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::mClientPackageName).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()->asBinder().get(),
132            TClientBase::mClientPid);
133    result.append("  State: ");
134
135    write(fd, result.string(), result.size());
136    // TODO: print dynamic/request section from most recent requests
137
138    return dumpDevice(fd, args);
139}
140
141template <typename TClientBase>
142status_t Camera2ClientBase<TClientBase>::dumpDevice(
143                                                int fd,
144                                                const Vector<String16>& args) {
145    String8 result;
146
147    result = "  Device dump:\n";
148    write(fd, result.string(), result.size());
149
150    if (!mDevice.get()) {
151        result = "  *** Device is detached\n";
152        write(fd, result.string(), result.size());
153        return NO_ERROR;
154    }
155
156    status_t res = mDevice->dump(fd, args);
157    if (res != OK) {
158        result = String8::format("   Error dumping device: %s (%d)",
159                strerror(-res), res);
160        write(fd, result.string(), result.size());
161    }
162
163    return NO_ERROR;
164}
165
166// ICameraClient2BaseUser interface
167
168
169template <typename TClientBase>
170void Camera2ClientBase<TClientBase>::disconnect() {
171    ATRACE_CALL();
172    Mutex::Autolock icl(mBinderSerializationLock);
173
174    // Allow both client and the media server to disconnect at all times
175    int callingPid = getCallingPid();
176    if (callingPid != TClientBase::mClientPid &&
177        callingPid != TClientBase::mServicePid) return;
178
179    ALOGV("Camera %d: Shutting down", TClientBase::mCameraId);
180
181    detachDevice();
182
183    CameraService::BasicClient::disconnect();
184
185    ALOGV("Camera %d: Shut down complete complete", TClientBase::mCameraId);
186}
187
188template <typename TClientBase>
189void Camera2ClientBase<TClientBase>::detachDevice() {
190    if (mDevice == 0) return;
191    mDevice->disconnect();
192
193    mDevice.clear();
194
195    ALOGV("Camera %d: Detach complete", TClientBase::mCameraId);
196}
197
198template <typename TClientBase>
199status_t Camera2ClientBase<TClientBase>::connect(
200        const sp<TCamCallbacks>& client) {
201    ATRACE_CALL();
202    ALOGV("%s: E", __FUNCTION__);
203    Mutex::Autolock icl(mBinderSerializationLock);
204
205    if (TClientBase::mClientPid != 0 &&
206        getCallingPid() != TClientBase::mClientPid) {
207
208        ALOGE("%s: Camera %d: Connection attempt from pid %d; "
209                "current locked to pid %d",
210                __FUNCTION__,
211                TClientBase::mCameraId,
212                getCallingPid(),
213                TClientBase::mClientPid);
214        return BAD_VALUE;
215    }
216
217    TClientBase::mClientPid = getCallingPid();
218
219    TClientBase::mRemoteCallback = client;
220    mSharedCameraCallbacks = client;
221
222    return OK;
223}
224
225/** Device-related methods */
226
227template <typename TClientBase>
228void Camera2ClientBase<TClientBase>::notifyError(
229        ICameraDeviceCallbacks::CameraErrorCode errorCode,
230        const CaptureResultExtras& resultExtras) {
231    ALOGE("Error condition %d reported by HAL, requestId %" PRId32, errorCode,
232          resultExtras.requestId);
233}
234
235template <typename TClientBase>
236void Camera2ClientBase<TClientBase>::notifyIdle() {
237    ALOGV("Camera device is now idle");
238}
239
240template <typename TClientBase>
241void Camera2ClientBase<TClientBase>::notifyShutter(const CaptureResultExtras& resultExtras,
242                                                   nsecs_t timestamp) {
243    (void)resultExtras;
244    (void)timestamp;
245
246    ALOGV("%s: Shutter notification for request id %" PRId32 " at time %" PRId64,
247            __FUNCTION__, resultExtras.requestId, timestamp);
248}
249
250template <typename TClientBase>
251void Camera2ClientBase<TClientBase>::notifyAutoFocus(uint8_t newState,
252                                                     int triggerId) {
253    (void)newState;
254    (void)triggerId;
255
256    ALOGV("%s: Autofocus state now %d, last trigger %d",
257          __FUNCTION__, newState, triggerId);
258
259}
260
261template <typename TClientBase>
262void Camera2ClientBase<TClientBase>::notifyAutoExposure(uint8_t newState,
263                                                        int triggerId) {
264    (void)newState;
265    (void)triggerId;
266
267    ALOGV("%s: Autoexposure state now %d, last trigger %d",
268            __FUNCTION__, newState, triggerId);
269}
270
271template <typename TClientBase>
272void Camera2ClientBase<TClientBase>::notifyAutoWhitebalance(uint8_t newState,
273                                                            int triggerId) {
274    (void)newState;
275    (void)triggerId;
276
277    ALOGV("%s: Auto-whitebalance state now %d, last trigger %d",
278            __FUNCTION__, newState, triggerId);
279}
280
281template <typename TClientBase>
282int Camera2ClientBase<TClientBase>::getCameraId() const {
283    return TClientBase::mCameraId;
284}
285
286template <typename TClientBase>
287int Camera2ClientBase<TClientBase>::getCameraDeviceVersion() const {
288    return mDeviceVersion;
289}
290
291template <typename TClientBase>
292const sp<CameraDeviceBase>& Camera2ClientBase<TClientBase>::getCameraDevice() {
293    return mDevice;
294}
295
296template <typename TClientBase>
297const sp<CameraService>& Camera2ClientBase<TClientBase>::getCameraService() {
298    return TClientBase::mCameraService;
299}
300
301template <typename TClientBase>
302Camera2ClientBase<TClientBase>::SharedCameraCallbacks::Lock::Lock(
303        SharedCameraCallbacks &client) :
304
305        mRemoteCallback(client.mRemoteCallback),
306        mSharedClient(client) {
307
308    mSharedClient.mRemoteCallbackLock.lock();
309}
310
311template <typename TClientBase>
312Camera2ClientBase<TClientBase>::SharedCameraCallbacks::Lock::~Lock() {
313    mSharedClient.mRemoteCallbackLock.unlock();
314}
315
316template <typename TClientBase>
317Camera2ClientBase<TClientBase>::SharedCameraCallbacks::SharedCameraCallbacks(
318        const sp<TCamCallbacks>&client) :
319
320        mRemoteCallback(client) {
321}
322
323template <typename TClientBase>
324typename Camera2ClientBase<TClientBase>::SharedCameraCallbacks&
325Camera2ClientBase<TClientBase>::SharedCameraCallbacks::operator=(
326        const sp<TCamCallbacks>&client) {
327
328    Mutex::Autolock l(mRemoteCallbackLock);
329    mRemoteCallback = client;
330    return *this;
331}
332
333template <typename TClientBase>
334void Camera2ClientBase<TClientBase>::SharedCameraCallbacks::clear() {
335    Mutex::Autolock l(mRemoteCallbackLock);
336    mRemoteCallback.clear();
337}
338
339template class Camera2ClientBase<CameraService::ProClient>;
340template class Camera2ClientBase<CameraService::Client>;
341template class Camera2ClientBase<CameraDeviceClientBase>;
342
343} // namespace android
344