Camera2ClientBase.cpp revision cb0652e5a850b2fcd919e977247e87239efaf70e 
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{
59    ALOGI("Camera %d: Opened", cameraId);
60
61    mDevice = CameraDeviceFactory::createDevice(cameraId);
62    LOG_ALWAYS_FATAL_IF(mDevice == 0, "Device should never be NULL here.");
63}
64
65template <typename TClientBase>
66status_t Camera2ClientBase<TClientBase>::checkPid(const char* checkLocation)
67        const {
68
69    int callingPid = getCallingPid();
70    if (callingPid == TClientBase::mClientPid) return NO_ERROR;
71
72    ALOGE("%s: attempt to use a locked camera from a different process"
73            " (old pid %d, new pid %d)", checkLocation, TClientBase::mClientPid, callingPid);
74    return PERMISSION_DENIED;
75}
76
77template <typename TClientBase>
78status_t Camera2ClientBase<TClientBase>::initialize(camera_module_t *module) {
79    ATRACE_CALL();
80    ALOGV("%s: Initializing client for camera %d", __FUNCTION__,
81          TClientBase::mCameraId);
82    status_t res;
83
84    // Verify ops permissions
85    res = TClientBase::startCameraOps();
86    if (res != OK) {
87        return res;
88    }
89
90    if (mDevice == NULL) {
91        ALOGE("%s: Camera %d: No device connected",
92                __FUNCTION__, TClientBase::mCameraId);
93        return NO_INIT;
94    }
95
96    res = mDevice->initialize(module);
97    if (res != OK) {
98        ALOGE("%s: Camera %d: unable to initialize device: %s (%d)",
99                __FUNCTION__, TClientBase::mCameraId, strerror(-res), res);
100        return res;
101    }
102
103    res = mDevice->setNotifyCallback(this);
104
105    return OK;
106}
107
108template <typename TClientBase>
109Camera2ClientBase<TClientBase>::~Camera2ClientBase() {
110    ATRACE_CALL();
111
112    TClientBase::mDestructionStarted = true;
113
114    TClientBase::finishCameraOps();
115
116    disconnect();
117
118    ALOGI("Closed Camera %d", TClientBase::mCameraId);
119}
120
121template <typename TClientBase>
122status_t Camera2ClientBase<TClientBase>::dump(int fd,
123                                              const Vector<String16>& args) {
124    String8 result;
125    result.appendFormat("Camera2ClientBase[%d] (%p) PID: %d, dump:\n",
126            TClientBase::mCameraId,
127            TClientBase::getRemoteCallback()->asBinder().get(),
128            TClientBase::mClientPid);
129    result.append("  State: ");
130
131    write(fd, result.string(), result.size());
132    // TODO: print dynamic/request section from most recent requests
133
134    return dumpDevice(fd, args);
135}
136
137template <typename TClientBase>
138status_t Camera2ClientBase<TClientBase>::dumpDevice(
139                                                int fd,
140                                                const Vector<String16>& args) {
141    String8 result;
142
143    result = "  Device dump:\n";
144    write(fd, result.string(), result.size());
145
146    if (!mDevice.get()) {
147        result = "  *** Device is detached\n";
148        write(fd, result.string(), result.size());
149        return NO_ERROR;
150    }
151
152    status_t res = mDevice->dump(fd, args);
153    if (res != OK) {
154        result = String8::format("   Error dumping device: %s (%d)",
155                strerror(-res), res);
156        write(fd, result.string(), result.size());
157    }
158
159    return NO_ERROR;
160}
161
162// ICameraClient2BaseUser interface
163
164
165template <typename TClientBase>
166void Camera2ClientBase<TClientBase>::disconnect() {
167    ATRACE_CALL();
168    Mutex::Autolock icl(mBinderSerializationLock);
169
170    // Allow both client and the media server to disconnect at all times
171    int callingPid = getCallingPid();
172    if (callingPid != TClientBase::mClientPid &&
173        callingPid != TClientBase::mServicePid) return;
174
175    ALOGV("Camera %d: Shutting down", TClientBase::mCameraId);
176
177    detachDevice();
178
179    CameraService::BasicClient::disconnect();
180
181    ALOGV("Camera %d: Shut down complete complete", TClientBase::mCameraId);
182}
183
184template <typename TClientBase>
185void Camera2ClientBase<TClientBase>::detachDevice() {
186    if (mDevice == 0) return;
187    mDevice->disconnect();
188
189    mDevice.clear();
190
191    ALOGV("Camera %d: Detach complete", TClientBase::mCameraId);
192}
193
194template <typename TClientBase>
195status_t Camera2ClientBase<TClientBase>::connect(
196        const sp<TCamCallbacks>& client) {
197    ATRACE_CALL();
198    ALOGV("%s: E", __FUNCTION__);
199    Mutex::Autolock icl(mBinderSerializationLock);
200
201    if (TClientBase::mClientPid != 0 &&
202        getCallingPid() != TClientBase::mClientPid) {
203
204        ALOGE("%s: Camera %d: Connection attempt from pid %d; "
205                "current locked to pid %d",
206                __FUNCTION__,
207                TClientBase::mCameraId,
208                getCallingPid(),
209                TClientBase::mClientPid);
210        return BAD_VALUE;
211    }
212
213    TClientBase::mClientPid = getCallingPid();
214
215    TClientBase::mRemoteCallback = client;
216    mSharedCameraCallbacks = client;
217
218    return OK;
219}
220
221/** Device-related methods */
222
223template <typename TClientBase>
224void Camera2ClientBase<TClientBase>::notifyError(
225        ICameraDeviceCallbacks::CameraErrorCode errorCode,
226        const CaptureResultExtras& resultExtras) {
227    ALOGE("Error condition %d reported by HAL, requestId %" PRId32, errorCode,
228          resultExtras.requestId);
229}
230
231template <typename TClientBase>
232void Camera2ClientBase<TClientBase>::notifyIdle() {
233    ALOGV("Camera device is now idle");
234}
235
236template <typename TClientBase>
237void Camera2ClientBase<TClientBase>::notifyShutter(const CaptureResultExtras& resultExtras,
238                                                   nsecs_t timestamp) {
239    (void)resultExtras;
240    (void)timestamp;
241
242    ALOGV("%s: Shutter notification for request id %" PRId32 " at time %" PRId64,
243            __FUNCTION__, resultExtras.requestId, timestamp);
244}
245
246template <typename TClientBase>
247void Camera2ClientBase<TClientBase>::notifyAutoFocus(uint8_t newState,
248                                                     int triggerId) {
249    (void)newState;
250    (void)triggerId;
251
252    ALOGV("%s: Autofocus state now %d, last trigger %d",
253          __FUNCTION__, newState, triggerId);
254
255}
256
257template <typename TClientBase>
258void Camera2ClientBase<TClientBase>::notifyAutoExposure(uint8_t newState,
259                                                        int triggerId) {
260    (void)newState;
261    (void)triggerId;
262
263    ALOGV("%s: Autoexposure state now %d, last trigger %d",
264            __FUNCTION__, newState, triggerId);
265}
266
267template <typename TClientBase>
268void Camera2ClientBase<TClientBase>::notifyAutoWhitebalance(uint8_t newState,
269                                                            int triggerId) {
270    (void)newState;
271    (void)triggerId;
272
273    ALOGV("%s: Auto-whitebalance state now %d, last trigger %d",
274            __FUNCTION__, newState, triggerId);
275}
276
277template <typename TClientBase>
278int Camera2ClientBase<TClientBase>::getCameraId() const {
279    return TClientBase::mCameraId;
280}
281
282template <typename TClientBase>
283const sp<CameraDeviceBase>& Camera2ClientBase<TClientBase>::getCameraDevice() {
284    return mDevice;
285}
286
287template <typename TClientBase>
288const sp<CameraService>& Camera2ClientBase<TClientBase>::getCameraService() {
289    return TClientBase::mCameraService;
290}
291
292template <typename TClientBase>
293Camera2ClientBase<TClientBase>::SharedCameraCallbacks::Lock::Lock(
294        SharedCameraCallbacks &client) :
295
296        mRemoteCallback(client.mRemoteCallback),
297        mSharedClient(client) {
298
299    mSharedClient.mRemoteCallbackLock.lock();
300}
301
302template <typename TClientBase>
303Camera2ClientBase<TClientBase>::SharedCameraCallbacks::Lock::~Lock() {
304    mSharedClient.mRemoteCallbackLock.unlock();
305}
306
307template <typename TClientBase>
308Camera2ClientBase<TClientBase>::SharedCameraCallbacks::SharedCameraCallbacks(
309        const sp<TCamCallbacks>&client) :
310
311        mRemoteCallback(client) {
312}
313
314template <typename TClientBase>
315typename Camera2ClientBase<TClientBase>::SharedCameraCallbacks&
316Camera2ClientBase<TClientBase>::SharedCameraCallbacks::operator=(
317        const sp<TCamCallbacks>&client) {
318
319    Mutex::Autolock l(mRemoteCallbackLock);
320    mRemoteCallback = client;
321    return *this;
322}
323
324template <typename TClientBase>
325void Camera2ClientBase<TClientBase>::SharedCameraCallbacks::clear() {
326    Mutex::Autolock l(mRemoteCallbackLock);
327    mRemoteCallback.clear();
328}
329
330template class Camera2ClientBase<CameraService::ProClient>;
331template class Camera2ClientBase<CameraService::Client>;
332template class Camera2ClientBase<CameraDeviceClientBase>;
333
334} // namespace android
335