Camera2ClientBase.cpp revision f1e98d857ec377f2c9b916073d40732e6ebb7ced 
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 <utils/Log.h>
22#include <utils/Trace.h>
23
24#include <cutils/properties.h>
25#include <gui/Surface.h>
26#include <gui/Surface.h>
27
28#include "common/Camera2ClientBase.h"
29
30#include "api2/CameraDeviceClient.h"
31
32#include "CameraDeviceFactory.h"
33
34namespace android {
35using namespace camera2;
36
37static int getCallingPid() {
38    return IPCThreadState::self()->getCallingPid();
39}
40
41// Interface used by CameraService
42
43template <typename TClientBase>
44Camera2ClientBase<TClientBase>::Camera2ClientBase(
45        const sp<CameraService>& cameraService,
46        const sp<TCamCallbacks>& remoteCallback,
47        const String16& clientPackageName,
48        int cameraId,
49        int cameraFacing,
50        int clientPid,
51        uid_t clientUid,
52        int servicePid):
53        TClientBase(cameraService, remoteCallback, clientPackageName,
54                cameraId, cameraFacing, clientPid, clientUid, servicePid),
55        mSharedCameraCallbacks(remoteCallback)
56{
57    ALOGI("Camera %d: Opened", cameraId);
58
59    mDevice = CameraDeviceFactory::createDevice(cameraId);
60    LOG_ALWAYS_FATAL_IF(mDevice == 0, "Device should never be NULL here.");
61}
62
63template <typename TClientBase>
64status_t Camera2ClientBase<TClientBase>::checkPid(const char* checkLocation)
65        const {
66
67    int callingPid = getCallingPid();
68    if (callingPid == TClientBase::mClientPid) return NO_ERROR;
69
70    ALOGE("%s: attempt to use a locked camera from a different process"
71            " (old pid %d, new pid %d)", checkLocation, TClientBase::mClientPid, callingPid);
72    return PERMISSION_DENIED;
73}
74
75template <typename TClientBase>
76status_t Camera2ClientBase<TClientBase>::initialize(camera_module_t *module) {
77    ATRACE_CALL();
78    ALOGV("%s: Initializing client for camera %d", __FUNCTION__,
79          TClientBase::mCameraId);
80    status_t res;
81
82    // Verify ops permissions
83    res = TClientBase::startCameraOps();
84    if (res != OK) {
85        return res;
86    }
87
88    if (mDevice == NULL) {
89        ALOGE("%s: Camera %d: No device connected",
90                __FUNCTION__, TClientBase::mCameraId);
91        return NO_INIT;
92    }
93
94    res = mDevice->initialize(module);
95    if (res != OK) {
96        ALOGE("%s: Camera %d: unable to initialize device: %s (%d)",
97                __FUNCTION__, TClientBase::mCameraId, strerror(-res), res);
98        return res;
99    }
100
101    res = mDevice->setNotifyCallback(this);
102
103    return OK;
104}
105
106template <typename TClientBase>
107Camera2ClientBase<TClientBase>::~Camera2ClientBase() {
108    ATRACE_CALL();
109
110    TClientBase::mDestructionStarted = true;
111
112    TClientBase::finishCameraOps();
113
114    disconnect();
115
116    ALOGI("Closed Camera %d", TClientBase::mCameraId);
117}
118
119template <typename TClientBase>
120status_t Camera2ClientBase<TClientBase>::dump(int fd,
121                                              const Vector<String16>& args) {
122    String8 result;
123    result.appendFormat("Camera2ClientBase[%d] (%p) PID: %d, dump:\n",
124            TClientBase::mCameraId,
125            TClientBase::getRemoteCallback()->asBinder().get(),
126            TClientBase::mClientPid);
127    result.append("  State: ");
128
129    write(fd, result.string(), result.size());
130    // TODO: print dynamic/request section from most recent requests
131
132    return dumpDevice(fd, args);
133}
134
135template <typename TClientBase>
136status_t Camera2ClientBase<TClientBase>::dumpDevice(
137                                                int fd,
138                                                const Vector<String16>& args) {
139    String8 result;
140
141    result = "  Device dump:\n";
142    write(fd, result.string(), result.size());
143
144    if (!mDevice.get()) {
145        result = "  *** Device is detached\n";
146        write(fd, result.string(), result.size());
147        return NO_ERROR;
148    }
149
150    status_t res = mDevice->dump(fd, args);
151    if (res != OK) {
152        result = String8::format("   Error dumping device: %s (%d)",
153                strerror(-res), res);
154        write(fd, result.string(), result.size());
155    }
156
157    return NO_ERROR;
158}
159
160// ICameraClient2BaseUser interface
161
162
163template <typename TClientBase>
164void Camera2ClientBase<TClientBase>::disconnect() {
165    ATRACE_CALL();
166    Mutex::Autolock icl(mBinderSerializationLock);
167
168    // Allow both client and the media server to disconnect at all times
169    int callingPid = getCallingPid();
170    if (callingPid != TClientBase::mClientPid &&
171        callingPid != TClientBase::mServicePid) return;
172
173    ALOGV("Camera %d: Shutting down", TClientBase::mCameraId);
174
175    detachDevice();
176
177    CameraService::BasicClient::disconnect();
178
179    ALOGV("Camera %d: Shut down complete complete", TClientBase::mCameraId);
180}
181
182template <typename TClientBase>
183void Camera2ClientBase<TClientBase>::detachDevice() {
184    if (mDevice == 0) return;
185    mDevice->disconnect();
186
187    mDevice.clear();
188
189    ALOGV("Camera %d: Detach complete", TClientBase::mCameraId);
190}
191
192template <typename TClientBase>
193status_t Camera2ClientBase<TClientBase>::connect(
194        const sp<TCamCallbacks>& client) {
195    ATRACE_CALL();
196    ALOGV("%s: E", __FUNCTION__);
197    Mutex::Autolock icl(mBinderSerializationLock);
198
199    if (TClientBase::mClientPid != 0 &&
200        getCallingPid() != TClientBase::mClientPid) {
201
202        ALOGE("%s: Camera %d: Connection attempt from pid %d; "
203                "current locked to pid %d",
204                __FUNCTION__,
205                TClientBase::mCameraId,
206                getCallingPid(),
207                TClientBase::mClientPid);
208        return BAD_VALUE;
209    }
210
211    TClientBase::mClientPid = getCallingPid();
212
213    TClientBase::mRemoteCallback = client;
214    mSharedCameraCallbacks = client;
215
216    return OK;
217}
218
219/** Device-related methods */
220
221template <typename TClientBase>
222void Camera2ClientBase<TClientBase>::notifyError(int errorCode, int arg1,
223                                                 int arg2) {
224    ALOGE("Error condition %d reported by HAL, arguments %d, %d", errorCode,
225          arg1, arg2);
226}
227
228template <typename TClientBase>
229void Camera2ClientBase<TClientBase>::notifyIdle() {
230    ALOGV("Camera device is now idle");
231}
232
233template <typename TClientBase>
234void Camera2ClientBase<TClientBase>::notifyShutter(int requestId,
235                                                   nsecs_t timestamp) {
236    (void)requestId;
237    (void)timestamp;
238
239    ALOGV("%s: Shutter notification for request id %d at time %lld",
240            __FUNCTION__, requestId, timestamp);
241}
242
243template <typename TClientBase>
244void Camera2ClientBase<TClientBase>::notifyAutoFocus(uint8_t newState,
245                                                     int triggerId) {
246    (void)newState;
247    (void)triggerId;
248
249    ALOGV("%s: Autofocus state now %d, last trigger %d",
250          __FUNCTION__, newState, triggerId);
251
252}
253
254template <typename TClientBase>
255void Camera2ClientBase<TClientBase>::notifyAutoExposure(uint8_t newState,
256                                                        int triggerId) {
257    (void)newState;
258    (void)triggerId;
259
260    ALOGV("%s: Autoexposure state now %d, last trigger %d",
261            __FUNCTION__, newState, triggerId);
262}
263
264template <typename TClientBase>
265void Camera2ClientBase<TClientBase>::notifyAutoWhitebalance(uint8_t newState,
266                                                            int triggerId) {
267    (void)newState;
268    (void)triggerId;
269
270    ALOGV("%s: Auto-whitebalance state now %d, last trigger %d",
271            __FUNCTION__, newState, triggerId);
272}
273
274template <typename TClientBase>
275int Camera2ClientBase<TClientBase>::getCameraId() const {
276    return TClientBase::mCameraId;
277}
278
279template <typename TClientBase>
280const sp<CameraDeviceBase>& Camera2ClientBase<TClientBase>::getCameraDevice() {
281    return mDevice;
282}
283
284template <typename TClientBase>
285const sp<CameraService>& Camera2ClientBase<TClientBase>::getCameraService() {
286    return TClientBase::mCameraService;
287}
288
289template <typename TClientBase>
290Camera2ClientBase<TClientBase>::SharedCameraCallbacks::Lock::Lock(
291        SharedCameraCallbacks &client) :
292
293        mRemoteCallback(client.mRemoteCallback),
294        mSharedClient(client) {
295
296    mSharedClient.mRemoteCallbackLock.lock();
297}
298
299template <typename TClientBase>
300Camera2ClientBase<TClientBase>::SharedCameraCallbacks::Lock::~Lock() {
301    mSharedClient.mRemoteCallbackLock.unlock();
302}
303
304template <typename TClientBase>
305Camera2ClientBase<TClientBase>::SharedCameraCallbacks::SharedCameraCallbacks(
306        const sp<TCamCallbacks>&client) :
307
308        mRemoteCallback(client) {
309}
310
311template <typename TClientBase>
312typename Camera2ClientBase<TClientBase>::SharedCameraCallbacks&
313Camera2ClientBase<TClientBase>::SharedCameraCallbacks::operator=(
314        const sp<TCamCallbacks>&client) {
315
316    Mutex::Autolock l(mRemoteCallbackLock);
317    mRemoteCallback = client;
318    return *this;
319}
320
321template <typename TClientBase>
322void Camera2ClientBase<TClientBase>::SharedCameraCallbacks::clear() {
323    Mutex::Autolock l(mRemoteCallbackLock);
324    mRemoteCallback.clear();
325}
326
327template class Camera2ClientBase<CameraService::ProClient>;
328template class Camera2ClientBase<CameraService::Client>;
329template class Camera2ClientBase<CameraDeviceClientBase>;
330
331} // namespace android
332