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 "device3/Camera3Device.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        mDeviceActive(false)
60{
61    ALOGI("Camera %d: Opened. Client: %s (PID %d, UID %d)", cameraId,
62            String8(clientPackageName).string(), clientPid, clientUid);
63
64    mInitialClientPid = clientPid;
65    mDevice = new Camera3Device(cameraId);
66    LOG_ALWAYS_FATAL_IF(mDevice == 0, "Device should never be NULL here.");
67}
68
69template <typename TClientBase>
70status_t Camera2ClientBase<TClientBase>::checkPid(const char* checkLocation)
71        const {
72
73    int callingPid = getCallingPid();
74    if (callingPid == TClientBase::mClientPid) return NO_ERROR;
75
76    ALOGE("%s: attempt to use a locked camera from a different process"
77            " (old pid %d, new pid %d)", checkLocation, TClientBase::mClientPid, callingPid);
78    return PERMISSION_DENIED;
79}
80
81template <typename TClientBase>
82status_t Camera2ClientBase<TClientBase>::initialize(CameraModule *module) {
83    ATRACE_CALL();
84    ALOGV("%s: Initializing client for camera %d", __FUNCTION__,
85          TClientBase::mCameraId);
86    status_t res;
87
88    // Verify ops permissions
89    res = TClientBase::startCameraOps();
90    if (res != OK) {
91        return res;
92    }
93
94    if (mDevice == NULL) {
95        ALOGE("%s: Camera %d: No device connected",
96                __FUNCTION__, TClientBase::mCameraId);
97        return NO_INIT;
98    }
99
100    res = mDevice->initialize(module);
101    if (res != OK) {
102        ALOGE("%s: Camera %d: unable to initialize device: %s (%d)",
103                __FUNCTION__, TClientBase::mCameraId, strerror(-res), res);
104        return res;
105    }
106
107    res = mDevice->setNotifyCallback(this);
108
109    return OK;
110}
111
112template <typename TClientBase>
113Camera2ClientBase<TClientBase>::~Camera2ClientBase() {
114    ATRACE_CALL();
115
116    TClientBase::mDestructionStarted = true;
117
118    disconnect();
119
120    ALOGI("Closed Camera %d. Client was: %s (PID %d, UID %u)",
121            TClientBase::mCameraId,
122            String8(TClientBase::mClientPackageName).string(),
123            mInitialClientPid, TClientBase::mClientUid);
124}
125
126template <typename TClientBase>
127status_t Camera2ClientBase<TClientBase>::dumpClient(int fd,
128                                              const Vector<String16>& args) {
129    String8 result;
130    result.appendFormat("Camera2ClientBase[%d] (%p) PID: %d, dump:\n",
131            TClientBase::mCameraId,
132            (TClientBase::getRemoteCallback() != NULL ?
133                    IInterface::asBinder(TClientBase::getRemoteCallback()).get() : NULL),
134            TClientBase::mClientPid);
135    result.append("  State: ");
136
137    write(fd, result.string(), result.size());
138    // TODO: print dynamic/request section from most recent requests
139
140    return dumpDevice(fd, args);
141}
142
143template <typename TClientBase>
144status_t Camera2ClientBase<TClientBase>::dumpDevice(
145                                                int fd,
146                                                const Vector<String16>& args) {
147    String8 result;
148
149    result = "  Device dump:\n";
150    write(fd, result.string(), result.size());
151
152    if (!mDevice.get()) {
153        result = "  *** Device is detached\n";
154        write(fd, result.string(), result.size());
155        return NO_ERROR;
156    }
157
158    status_t res = mDevice->dump(fd, args);
159    if (res != OK) {
160        result = String8::format("   Error dumping device: %s (%d)",
161                strerror(-res), res);
162        write(fd, result.string(), result.size());
163    }
164
165    return NO_ERROR;
166}
167
168// ICameraClient2BaseUser interface
169
170
171template <typename TClientBase>
172binder::Status Camera2ClientBase<TClientBase>::disconnect() {
173    ATRACE_CALL();
174    Mutex::Autolock icl(mBinderSerializationLock);
175
176    binder::Status res = binder::Status::ok();
177    // Allow both client and the media server to disconnect at all times
178    int callingPid = getCallingPid();
179    if (callingPid != TClientBase::mClientPid &&
180        callingPid != TClientBase::mServicePid) return res;
181
182    ALOGV("Camera %d: Shutting down", TClientBase::mCameraId);
183
184    detachDevice();
185
186    CameraService::BasicClient::disconnect();
187
188    ALOGV("Camera %d: Shut down complete complete", TClientBase::mCameraId);
189
190    return res;
191}
192
193template <typename TClientBase>
194void Camera2ClientBase<TClientBase>::detachDevice() {
195    if (mDevice == 0) return;
196    mDevice->disconnect();
197
198    mDevice.clear();
199
200    ALOGV("Camera %d: Detach complete", TClientBase::mCameraId);
201}
202
203template <typename TClientBase>
204status_t Camera2ClientBase<TClientBase>::connect(
205        const sp<TCamCallbacks>& client) {
206    ATRACE_CALL();
207    ALOGV("%s: E", __FUNCTION__);
208    Mutex::Autolock icl(mBinderSerializationLock);
209
210    if (TClientBase::mClientPid != 0 &&
211        getCallingPid() != TClientBase::mClientPid) {
212
213        ALOGE("%s: Camera %d: Connection attempt from pid %d; "
214                "current locked to pid %d",
215                __FUNCTION__,
216                TClientBase::mCameraId,
217                getCallingPid(),
218                TClientBase::mClientPid);
219        return BAD_VALUE;
220    }
221
222    TClientBase::mClientPid = getCallingPid();
223
224    TClientBase::mRemoteCallback = client;
225    mSharedCameraCallbacks = client;
226
227    return OK;
228}
229
230/** Device-related methods */
231
232template <typename TClientBase>
233void Camera2ClientBase<TClientBase>::notifyError(
234        int32_t errorCode,
235        const CaptureResultExtras& resultExtras) {
236    ALOGE("Error condition %d reported by HAL, requestId %" PRId32, errorCode,
237          resultExtras.requestId);
238}
239
240template <typename TClientBase>
241void Camera2ClientBase<TClientBase>::notifyIdle() {
242    if (mDeviceActive) {
243        getCameraService()->updateProxyDeviceState(
244            ICameraServiceProxy::CAMERA_STATE_IDLE,
245            String8::format("%d", TClientBase::mCameraId));
246    }
247    mDeviceActive = false;
248
249    ALOGV("Camera device is now idle");
250}
251
252template <typename TClientBase>
253void Camera2ClientBase<TClientBase>::notifyShutter(const CaptureResultExtras& resultExtras,
254                                                   nsecs_t timestamp) {
255    (void)resultExtras;
256    (void)timestamp;
257
258    if (!mDeviceActive) {
259        getCameraService()->updateProxyDeviceState(
260            ICameraServiceProxy::CAMERA_STATE_ACTIVE,
261            String8::format("%d", TClientBase::mCameraId));
262    }
263    mDeviceActive = true;
264
265    ALOGV("%s: Shutter notification for request id %" PRId32 " at time %" PRId64,
266            __FUNCTION__, resultExtras.requestId, timestamp);
267}
268
269template <typename TClientBase>
270void Camera2ClientBase<TClientBase>::notifyAutoFocus(uint8_t newState,
271                                                     int triggerId) {
272    (void)newState;
273    (void)triggerId;
274
275    ALOGV("%s: Autofocus state now %d, last trigger %d",
276          __FUNCTION__, newState, triggerId);
277
278}
279
280template <typename TClientBase>
281void Camera2ClientBase<TClientBase>::notifyAutoExposure(uint8_t newState,
282                                                        int triggerId) {
283    (void)newState;
284    (void)triggerId;
285
286    ALOGV("%s: Autoexposure state now %d, last trigger %d",
287            __FUNCTION__, newState, triggerId);
288}
289
290template <typename TClientBase>
291void Camera2ClientBase<TClientBase>::notifyAutoWhitebalance(uint8_t newState,
292                                                            int triggerId) {
293    (void)newState;
294    (void)triggerId;
295
296    ALOGV("%s: Auto-whitebalance state now %d, last trigger %d",
297            __FUNCTION__, newState, triggerId);
298}
299
300template <typename TClientBase>
301void Camera2ClientBase<TClientBase>::notifyPrepared(int streamId) {
302    (void)streamId;
303
304    ALOGV("%s: Stream %d now prepared",
305            __FUNCTION__, streamId);
306}
307
308template <typename TClientBase>
309void Camera2ClientBase<TClientBase>::notifyRepeatingRequestError(long lastFrameNumber) {
310    (void)lastFrameNumber;
311
312    ALOGV("%s: Repeating request was stopped. Last frame number is %ld",
313            __FUNCTION__, lastFrameNumber);
314}
315
316template <typename TClientBase>
317int Camera2ClientBase<TClientBase>::getCameraId() const {
318    return TClientBase::mCameraId;
319}
320
321template <typename TClientBase>
322int Camera2ClientBase<TClientBase>::getCameraDeviceVersion() const {
323    return mDeviceVersion;
324}
325
326template <typename TClientBase>
327const sp<CameraDeviceBase>& Camera2ClientBase<TClientBase>::getCameraDevice() {
328    return mDevice;
329}
330
331template <typename TClientBase>
332const sp<CameraService>& Camera2ClientBase<TClientBase>::getCameraService() {
333    return TClientBase::mCameraService;
334}
335
336template <typename TClientBase>
337Camera2ClientBase<TClientBase>::SharedCameraCallbacks::Lock::Lock(
338        SharedCameraCallbacks &client) :
339
340        mRemoteCallback(client.mRemoteCallback),
341        mSharedClient(client) {
342
343    mSharedClient.mRemoteCallbackLock.lock();
344}
345
346template <typename TClientBase>
347Camera2ClientBase<TClientBase>::SharedCameraCallbacks::Lock::~Lock() {
348    mSharedClient.mRemoteCallbackLock.unlock();
349}
350
351template <typename TClientBase>
352Camera2ClientBase<TClientBase>::SharedCameraCallbacks::SharedCameraCallbacks(
353        const sp<TCamCallbacks>&client) :
354
355        mRemoteCallback(client) {
356}
357
358template <typename TClientBase>
359typename Camera2ClientBase<TClientBase>::SharedCameraCallbacks&
360Camera2ClientBase<TClientBase>::SharedCameraCallbacks::operator=(
361        const sp<TCamCallbacks>&client) {
362
363    Mutex::Autolock l(mRemoteCallbackLock);
364    mRemoteCallback = client;
365    return *this;
366}
367
368template <typename TClientBase>
369void Camera2ClientBase<TClientBase>::SharedCameraCallbacks::clear() {
370    Mutex::Autolock l(mRemoteCallbackLock);
371    mRemoteCallback.clear();
372}
373
374template class Camera2ClientBase<CameraService::Client>;
375template class Camera2ClientBase<CameraDeviceClientBase>;
376
377} // namespace android
378