CameraService.cpp revision 29cdd9bb46437ab580deabf33b2242106e0090b6 
1/*
2 * Copyright (C) 2008 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 "CameraService"
18//#define LOG_NDEBUG 0
19
20#include <stdio.h>
21#include <string.h>
22#include <sys/types.h>
23#include <pthread.h>
24
25#include <binder/AppOpsManager.h>
26#include <binder/IPCThreadState.h>
27#include <binder/IServiceManager.h>
28#include <binder/MemoryBase.h>
29#include <binder/MemoryHeapBase.h>
30#include <cutils/atomic.h>
31#include <cutils/properties.h>
32#include <gui/Surface.h>
33#include <hardware/hardware.h>
34#include <media/AudioSystem.h>
35#include <media/IMediaHTTPService.h>
36#include <media/mediaplayer.h>
37#include <utils/Errors.h>
38#include <utils/Log.h>
39#include <utils/String16.h>
40#include <utils/Trace.h>
41#include <system/camera_vendor_tags.h>
42
43#include "CameraService.h"
44#include "api1/CameraClient.h"
45#include "api1/Camera2Client.h"
46#include "api_pro/ProCamera2Client.h"
47#include "api2/CameraDeviceClient.h"
48#include "utils/CameraTraces.h"
49#include "CameraDeviceFactory.h"
50
51namespace android {
52
53// ----------------------------------------------------------------------------
54// Logging support -- this is for debugging only
55// Use "adb shell dumpsys media.camera -v 1" to change it.
56volatile int32_t gLogLevel = 0;
57
58#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__);
59#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__);
60
61static void setLogLevel(int level) {
62    android_atomic_write(level, &gLogLevel);
63}
64
65// ----------------------------------------------------------------------------
66
67static int getCallingPid() {
68    return IPCThreadState::self()->getCallingPid();
69}
70
71static int getCallingUid() {
72    return IPCThreadState::self()->getCallingUid();
73}
74
75extern "C" {
76static void camera_device_status_change(
77        const struct camera_module_callbacks* callbacks,
78        int camera_id,
79        int new_status) {
80    sp<CameraService> cs = const_cast<CameraService*>(
81                                static_cast<const CameraService*>(callbacks));
82
83    cs->onDeviceStatusChanged(
84        camera_id,
85        new_status);
86}
87} // extern "C"
88
89// ----------------------------------------------------------------------------
90
91// This is ugly and only safe if we never re-create the CameraService, but
92// should be ok for now.
93static CameraService *gCameraService;
94
95CameraService::CameraService()
96    :mSoundRef(0), mModule(0)
97{
98    ALOGI("CameraService started (pid=%d)", getpid());
99    gCameraService = this;
100
101    for (size_t i = 0; i < MAX_CAMERAS; ++i) {
102        mStatusList[i] = ICameraServiceListener::STATUS_PRESENT;
103    }
104
105    this->camera_device_status_change = android::camera_device_status_change;
106}
107
108void CameraService::onFirstRef()
109{
110    LOG1("CameraService::onFirstRef");
111
112    BnCameraService::onFirstRef();
113
114    if (hw_get_module(CAMERA_HARDWARE_MODULE_ID,
115                (const hw_module_t **)&mModule) < 0) {
116        ALOGE("Could not load camera HAL module");
117        mNumberOfCameras = 0;
118    }
119    else {
120        ALOGI("Loaded \"%s\" camera module", mModule->common.name);
121        mNumberOfCameras = mModule->get_number_of_cameras();
122        if (mNumberOfCameras > MAX_CAMERAS) {
123            ALOGE("Number of cameras(%d) > MAX_CAMERAS(%d).",
124                    mNumberOfCameras, MAX_CAMERAS);
125            mNumberOfCameras = MAX_CAMERAS;
126        }
127        for (int i = 0; i < mNumberOfCameras; i++) {
128            setCameraFree(i);
129        }
130
131        if (mModule->common.module_api_version >=
132                CAMERA_MODULE_API_VERSION_2_1) {
133            mModule->set_callbacks(this);
134        }
135
136        VendorTagDescriptor::clearGlobalVendorTagDescriptor();
137
138        if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_2) {
139            setUpVendorTags();
140        }
141
142        CameraDeviceFactory::registerService(this);
143    }
144}
145
146CameraService::~CameraService() {
147    for (int i = 0; i < mNumberOfCameras; i++) {
148        if (mBusy[i]) {
149            ALOGE("camera %d is still in use in destructor!", i);
150        }
151    }
152
153    VendorTagDescriptor::clearGlobalVendorTagDescriptor();
154    gCameraService = NULL;
155}
156
157void CameraService::onDeviceStatusChanged(int cameraId,
158                                          int newStatus)
159{
160    ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__,
161          cameraId, newStatus);
162
163    if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
164        ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId);
165        return;
166    }
167
168    if ((int)getStatus(cameraId) == newStatus) {
169        ALOGE("%s: State transition to the same status 0x%x not allowed",
170              __FUNCTION__, (uint32_t)newStatus);
171        return;
172    }
173
174    /* don't do this in updateStatus
175       since it is also called from connect and we could get into a deadlock */
176    if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) {
177        Vector<sp<BasicClient> > clientsToDisconnect;
178        {
179           Mutex::Autolock al(mServiceLock);
180
181           /* Find all clients that we need to disconnect */
182           sp<BasicClient> client = mClient[cameraId].promote();
183           if (client.get() != NULL) {
184               clientsToDisconnect.push_back(client);
185           }
186
187           int i = cameraId;
188           for (size_t j = 0; j < mProClientList[i].size(); ++j) {
189               sp<ProClient> cl = mProClientList[i][j].promote();
190               if (cl != NULL) {
191                   clientsToDisconnect.push_back(cl);
192               }
193           }
194        }
195
196        /* now disconnect them. don't hold the lock
197           or we can get into a deadlock */
198
199        for (size_t i = 0; i < clientsToDisconnect.size(); ++i) {
200            sp<BasicClient> client = clientsToDisconnect[i];
201
202            client->disconnect();
203            /**
204             * The remote app will no longer be able to call methods on the
205             * client since the client PID will be reset to 0
206             */
207        }
208
209        ALOGV("%s: After unplug, disconnected %zu clients",
210              __FUNCTION__, clientsToDisconnect.size());
211    }
212
213    updateStatus(
214            static_cast<ICameraServiceListener::Status>(newStatus), cameraId);
215
216}
217
218int32_t CameraService::getNumberOfCameras() {
219    return mNumberOfCameras;
220}
221
222status_t CameraService::getCameraInfo(int cameraId,
223                                      struct CameraInfo* cameraInfo) {
224    if (!mModule) {
225        return -ENODEV;
226    }
227
228    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
229        return BAD_VALUE;
230    }
231
232    struct camera_info info;
233    status_t rc = mModule->get_camera_info(cameraId, &info);
234    cameraInfo->facing = info.facing;
235    cameraInfo->orientation = info.orientation;
236    return rc;
237}
238
239status_t CameraService::getCameraCharacteristics(int cameraId,
240                                                CameraMetadata* cameraInfo) {
241    if (!cameraInfo) {
242        ALOGE("%s: cameraInfo is NULL", __FUNCTION__);
243        return BAD_VALUE;
244    }
245
246    if (!mModule) {
247        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
248        return -ENODEV;
249    }
250
251    if (mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_0) {
252        // TODO: Remove this check once HAL1 shim is in place.
253        ALOGE("%s: Only HAL module version V2 or higher supports static metadata", __FUNCTION__);
254        return BAD_VALUE;
255    }
256
257    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
258        ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId);
259        return BAD_VALUE;
260    }
261
262    int facing;
263    if (getDeviceVersion(cameraId, &facing) == CAMERA_DEVICE_API_VERSION_1_0) {
264        // TODO: Remove this check once HAL1 shim is in place.
265        ALOGE("%s: HAL1 doesn't support static metadata yet", __FUNCTION__);
266        return BAD_VALUE;
267    }
268
269    if (getDeviceVersion(cameraId, &facing) <= CAMERA_DEVICE_API_VERSION_2_1) {
270        // Disable HAL2.x support for camera2 API for now.
271        ALOGW("%s: HAL2.x doesn't support getCameraCharacteristics for now", __FUNCTION__);
272        return BAD_VALUE;
273    }
274
275    struct camera_info info;
276    status_t ret = mModule->get_camera_info(cameraId, &info);
277    *cameraInfo = info.static_camera_characteristics;
278
279    return ret;
280}
281
282status_t CameraService::getCameraVendorTagDescriptor(/*out*/sp<VendorTagDescriptor>& desc) {
283    if (!mModule) {
284        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
285        return -ENODEV;
286    }
287
288    if (mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_2) {
289        // TODO: Remove this check once HAL1 shim is in place.
290        ALOGW("%s: Only HAL module version V2.2 or higher supports vendor tags", __FUNCTION__);
291        return -EOPNOTSUPP;
292    }
293
294    desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
295    return OK;
296}
297
298int CameraService::getDeviceVersion(int cameraId, int* facing) {
299    struct camera_info info;
300    if (mModule->get_camera_info(cameraId, &info) != OK) {
301        return -1;
302    }
303
304    int deviceVersion;
305    if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_0) {
306        deviceVersion = info.device_version;
307    } else {
308        deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
309    }
310
311    if (facing) {
312        *facing = info.facing;
313    }
314
315    return deviceVersion;
316}
317
318bool CameraService::isValidCameraId(int cameraId) {
319    int facing;
320    int deviceVersion = getDeviceVersion(cameraId, &facing);
321
322    switch(deviceVersion) {
323      case CAMERA_DEVICE_API_VERSION_1_0:
324      case CAMERA_DEVICE_API_VERSION_2_0:
325      case CAMERA_DEVICE_API_VERSION_2_1:
326      case CAMERA_DEVICE_API_VERSION_3_0:
327        return true;
328      default:
329        return false;
330    }
331
332    return false;
333}
334
335bool CameraService::setUpVendorTags() {
336    vendor_tag_ops_t vOps = vendor_tag_ops_t();
337
338    // Check if vendor operations have been implemented
339    if (mModule->get_vendor_tag_ops == NULL) {
340        ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__);
341        return false;
342    }
343
344    ATRACE_BEGIN("camera3->get_metadata_vendor_tag_ops");
345    mModule->get_vendor_tag_ops(&vOps);
346    ATRACE_END();
347
348    // Ensure all vendor operations are present
349    if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL ||
350            vOps.get_section_name == NULL || vOps.get_tag_name == NULL ||
351            vOps.get_tag_type == NULL) {
352        ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions."
353               , __FUNCTION__);
354        return false;
355    }
356
357    // Read all vendor tag definitions into a descriptor
358    sp<VendorTagDescriptor> desc;
359    status_t res;
360    if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc))
361            != OK) {
362        ALOGE("%s: Could not generate descriptor from vendor tag operations,"
363              "received error %s (%d). Camera clients will not be able to use"
364              "vendor tags", __FUNCTION__, strerror(res), res);
365        return false;
366    }
367
368    // Set the global descriptor to use with camera metadata
369    VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc);
370    return true;
371}
372
373status_t CameraService::validateConnect(int cameraId,
374                                    /*inout*/
375                                    int& clientUid) const {
376
377    int callingPid = getCallingPid();
378
379    if (clientUid == USE_CALLING_UID) {
380        clientUid = getCallingUid();
381    } else {
382        // We only trust our own process to forward client UIDs
383        if (callingPid != getpid()) {
384            ALOGE("CameraService::connect X (pid %d) rejected (don't trust clientUid)",
385                    callingPid);
386            return PERMISSION_DENIED;
387        }
388    }
389
390    if (!mModule) {
391        ALOGE("Camera HAL module not loaded");
392        return -ENODEV;
393    }
394
395    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
396        ALOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).",
397            callingPid, cameraId);
398        return -ENODEV;
399    }
400
401    char value[PROPERTY_VALUE_MAX];
402    property_get("sys.secpolicy.camera.disabled", value, "0");
403    if (strcmp(value, "1") == 0) {
404        // Camera is disabled by DevicePolicyManager.
405        ALOGI("Camera is disabled. connect X (pid %d) rejected", callingPid);
406        return -EACCES;
407    }
408
409    ICameraServiceListener::Status currentStatus = getStatus(cameraId);
410    if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
411        ALOGI("Camera is not plugged in,"
412               " connect X (pid %d) rejected", callingPid);
413        return -ENODEV;
414    } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
415        ALOGI("Camera is enumerating,"
416               " connect X (pid %d) rejected", callingPid);
417        return -EBUSY;
418    }
419    // Else don't check for STATUS_NOT_AVAILABLE.
420    //  -- It's done implicitly in canConnectUnsafe /w the mBusy array
421
422    return OK;
423}
424
425bool CameraService::canConnectUnsafe(int cameraId,
426                                     const String16& clientPackageName,
427                                     const sp<IBinder>& remoteCallback,
428                                     sp<BasicClient> &client) {
429    String8 clientName8(clientPackageName);
430    int callingPid = getCallingPid();
431
432    if (mClient[cameraId] != 0) {
433        client = mClient[cameraId].promote();
434        if (client != 0) {
435            if (remoteCallback == client->getRemote()) {
436                LOG1("CameraService::connect X (pid %d) (the same client)",
437                     callingPid);
438                return true;
439            } else {
440                // TODOSC: need to support 1 regular client,
441                // multiple shared clients here
442                ALOGW("CameraService::connect X (pid %d) rejected"
443                      " (existing client).", callingPid);
444                return false;
445            }
446        }
447        mClient[cameraId].clear();
448    }
449
450    /*
451    mBusy is set to false as the last step of the Client destructor,
452    after which it is guaranteed that the Client destructor has finished (
453    including any inherited destructors)
454
455    We only need this for a Client subclasses since we don't allow
456    multiple Clents to be opened concurrently, but multiple BasicClient
457    would be fine
458    */
459    if (mBusy[cameraId]) {
460        ALOGW("CameraService::connect X (pid %d, \"%s\") rejected"
461                " (camera %d is still busy).", callingPid,
462                clientName8.string(), cameraId);
463        return false;
464    }
465
466    return true;
467}
468
469status_t CameraService::connect(
470        const sp<ICameraClient>& cameraClient,
471        int cameraId,
472        const String16& clientPackageName,
473        int clientUid,
474        /*out*/
475        sp<ICamera>& device) {
476
477    String8 clientName8(clientPackageName);
478    int callingPid = getCallingPid();
479
480    LOG1("CameraService::connect E (pid %d \"%s\", id %d)", callingPid,
481            clientName8.string(), cameraId);
482
483    status_t status = validateConnect(cameraId, /*inout*/clientUid);
484    if (status != OK) {
485        return status;
486    }
487
488
489    sp<Client> client;
490    {
491        Mutex::Autolock lock(mServiceLock);
492        sp<BasicClient> clientTmp;
493        if (!canConnectUnsafe(cameraId, clientPackageName,
494                              cameraClient->asBinder(),
495                              /*out*/clientTmp)) {
496            return -EBUSY;
497        } else if (client.get() != NULL) {
498            device = static_cast<Client*>(clientTmp.get());
499            return OK;
500        }
501
502        int facing = -1;
503        int deviceVersion = getDeviceVersion(cameraId, &facing);
504
505        // If there are other non-exclusive users of the camera,
506        //  this will tear them down before we can reuse the camera
507        if (isValidCameraId(cameraId)) {
508            // transition from PRESENT -> NOT_AVAILABLE
509            updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
510                         cameraId);
511        }
512
513        switch(deviceVersion) {
514          case CAMERA_DEVICE_API_VERSION_1_0:
515            client = new CameraClient(this, cameraClient,
516                    clientPackageName, cameraId,
517                    facing, callingPid, clientUid, getpid());
518            break;
519          case CAMERA_DEVICE_API_VERSION_2_0:
520          case CAMERA_DEVICE_API_VERSION_2_1:
521          case CAMERA_DEVICE_API_VERSION_3_0:
522            client = new Camera2Client(this, cameraClient,
523                    clientPackageName, cameraId,
524                    facing, callingPid, clientUid, getpid(),
525                    deviceVersion);
526            break;
527          case -1:
528            ALOGE("Invalid camera id %d", cameraId);
529            return BAD_VALUE;
530          default:
531            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
532            return INVALID_OPERATION;
533        }
534
535        status_t status = connectFinishUnsafe(client, client->getRemote());
536        if (status != OK) {
537            // this is probably not recoverable.. maybe the client can try again
538            // OK: we can only get here if we were originally in PRESENT state
539            updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId);
540            return status;
541        }
542
543        mClient[cameraId] = client;
544        LOG1("CameraService::connect X (id %d, this pid is %d)", cameraId,
545             getpid());
546    }
547    // important: release the mutex here so the client can call back
548    //    into the service from its destructor (can be at the end of the call)
549
550    device = client;
551    return OK;
552}
553
554status_t CameraService::connectFinishUnsafe(const sp<BasicClient>& client,
555                                            const sp<IBinder>& remoteCallback) {
556    status_t status = client->initialize(mModule);
557    if (status != OK) {
558        return status;
559    }
560
561    remoteCallback->linkToDeath(this);
562
563    return OK;
564}
565
566status_t CameraService::connectPro(
567                                        const sp<IProCameraCallbacks>& cameraCb,
568                                        int cameraId,
569                                        const String16& clientPackageName,
570                                        int clientUid,
571                                        /*out*/
572                                        sp<IProCameraUser>& device)
573{
574    String8 clientName8(clientPackageName);
575    int callingPid = getCallingPid();
576
577    LOG1("CameraService::connectPro E (pid %d \"%s\", id %d)", callingPid,
578            clientName8.string(), cameraId);
579    status_t status = validateConnect(cameraId, /*inout*/clientUid);
580    if (status != OK) {
581        return status;
582    }
583
584    sp<ProClient> client;
585    {
586        Mutex::Autolock lock(mServiceLock);
587        {
588            sp<BasicClient> client;
589            if (!canConnectUnsafe(cameraId, clientPackageName,
590                                  cameraCb->asBinder(),
591                                  /*out*/client)) {
592                return -EBUSY;
593            }
594        }
595
596        int facing = -1;
597        int deviceVersion = getDeviceVersion(cameraId, &facing);
598
599        switch(deviceVersion) {
600          case CAMERA_DEVICE_API_VERSION_1_0:
601            ALOGE("Camera id %d uses HALv1, doesn't support ProCamera",
602                  cameraId);
603            return -EOPNOTSUPP;
604            break;
605          case CAMERA_DEVICE_API_VERSION_2_0:
606          case CAMERA_DEVICE_API_VERSION_2_1:
607          case CAMERA_DEVICE_API_VERSION_3_0:
608            client = new ProCamera2Client(this, cameraCb, String16(),
609                    cameraId, facing, callingPid, USE_CALLING_UID, getpid());
610            break;
611          case -1:
612            ALOGE("Invalid camera id %d", cameraId);
613            return BAD_VALUE;
614          default:
615            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
616            return INVALID_OPERATION;
617        }
618
619        status_t status = connectFinishUnsafe(client, client->getRemote());
620        if (status != OK) {
621            return status;
622        }
623
624        mProClientList[cameraId].push(client);
625
626        LOG1("CameraService::connectPro X (id %d, this pid is %d)", cameraId,
627                getpid());
628    }
629    // important: release the mutex here so the client can call back
630    //    into the service from its destructor (can be at the end of the call)
631    device = client;
632    return OK;
633}
634
635status_t CameraService::connectDevice(
636        const sp<ICameraDeviceCallbacks>& cameraCb,
637        int cameraId,
638        const String16& clientPackageName,
639        int clientUid,
640        /*out*/
641        sp<ICameraDeviceUser>& device)
642{
643
644    String8 clientName8(clientPackageName);
645    int callingPid = getCallingPid();
646
647    LOG1("CameraService::connectDevice E (pid %d \"%s\", id %d)", callingPid,
648            clientName8.string(), cameraId);
649
650    status_t status = validateConnect(cameraId, /*inout*/clientUid);
651    if (status != OK) {
652        return status;
653    }
654
655    sp<CameraDeviceClient> client;
656    {
657        Mutex::Autolock lock(mServiceLock);
658        {
659            sp<BasicClient> client;
660            if (!canConnectUnsafe(cameraId, clientPackageName,
661                                  cameraCb->asBinder(),
662                                  /*out*/client)) {
663                return -EBUSY;
664            }
665        }
666
667        int facing = -1;
668        int deviceVersion = getDeviceVersion(cameraId, &facing);
669
670        // If there are other non-exclusive users of the camera,
671        //  this will tear them down before we can reuse the camera
672        if (isValidCameraId(cameraId)) {
673            // transition from PRESENT -> NOT_AVAILABLE
674            updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
675                         cameraId);
676        }
677
678        switch(deviceVersion) {
679          case CAMERA_DEVICE_API_VERSION_1_0:
680            ALOGW("Camera using old HAL version: %d", deviceVersion);
681            return -EOPNOTSUPP;
682           // TODO: don't allow 2.0  Only allow 2.1 and higher
683          case CAMERA_DEVICE_API_VERSION_2_0:
684          case CAMERA_DEVICE_API_VERSION_2_1:
685          case CAMERA_DEVICE_API_VERSION_3_0:
686            client = new CameraDeviceClient(this, cameraCb, String16(),
687                    cameraId, facing, callingPid, USE_CALLING_UID, getpid());
688            break;
689          case -1:
690            ALOGE("Invalid camera id %d", cameraId);
691            return BAD_VALUE;
692          default:
693            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
694            return INVALID_OPERATION;
695        }
696
697        status_t status = connectFinishUnsafe(client, client->getRemote());
698        if (status != OK) {
699            // this is probably not recoverable.. maybe the client can try again
700            // OK: we can only get here if we were originally in PRESENT state
701            updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId);
702            return status;
703        }
704
705        LOG1("CameraService::connectDevice X (id %d, this pid is %d)", cameraId,
706                getpid());
707
708        mClient[cameraId] = client;
709    }
710    // important: release the mutex here so the client can call back
711    //    into the service from its destructor (can be at the end of the call)
712
713    device = client;
714    return OK;
715}
716
717
718status_t CameraService::addListener(
719                                const sp<ICameraServiceListener>& listener) {
720    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
721
722    if (listener == 0) {
723        ALOGE("%s: Listener must not be null", __FUNCTION__);
724        return BAD_VALUE;
725    }
726
727    Mutex::Autolock lock(mServiceLock);
728
729    Vector<sp<ICameraServiceListener> >::iterator it, end;
730    for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
731        if ((*it)->asBinder() == listener->asBinder()) {
732            ALOGW("%s: Tried to add listener %p which was already subscribed",
733                  __FUNCTION__, listener.get());
734            return ALREADY_EXISTS;
735        }
736    }
737
738    mListenerList.push_back(listener);
739
740    /* Immediately signal current status to this listener only */
741    {
742        Mutex::Autolock m(mStatusMutex) ;
743        int numCams = getNumberOfCameras();
744        for (int i = 0; i < numCams; ++i) {
745            listener->onStatusChanged(mStatusList[i], i);
746        }
747    }
748
749    return OK;
750}
751status_t CameraService::removeListener(
752                                const sp<ICameraServiceListener>& listener) {
753    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
754
755    if (listener == 0) {
756        ALOGE("%s: Listener must not be null", __FUNCTION__);
757        return BAD_VALUE;
758    }
759
760    Mutex::Autolock lock(mServiceLock);
761
762    Vector<sp<ICameraServiceListener> >::iterator it;
763    for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
764        if ((*it)->asBinder() == listener->asBinder()) {
765            mListenerList.erase(it);
766            return OK;
767        }
768    }
769
770    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
771          __FUNCTION__, listener.get());
772
773    return BAD_VALUE;
774}
775
776void CameraService::removeClientByRemote(const wp<IBinder>& remoteBinder) {
777    int callingPid = getCallingPid();
778    LOG1("CameraService::removeClientByRemote E (pid %d)", callingPid);
779
780    // Declare this before the lock to make absolutely sure the
781    // destructor won't be called with the lock held.
782    Mutex::Autolock lock(mServiceLock);
783
784    int outIndex;
785    sp<BasicClient> client = findClientUnsafe(remoteBinder, outIndex);
786
787    if (client != 0) {
788        // Found our camera, clear and leave.
789        LOG1("removeClient: clear camera %d", outIndex);
790        mClient[outIndex].clear();
791
792        client->getRemote()->unlinkToDeath(this);
793    } else {
794
795        sp<ProClient> clientPro = findProClientUnsafe(remoteBinder);
796
797        if (clientPro != NULL) {
798            // Found our camera, clear and leave.
799            LOG1("removeClient: clear pro %p", clientPro.get());
800
801            clientPro->getRemoteCallback()->asBinder()->unlinkToDeath(this);
802        }
803    }
804
805    LOG1("CameraService::removeClientByRemote X (pid %d)", callingPid);
806}
807
808sp<CameraService::ProClient> CameraService::findProClientUnsafe(
809                        const wp<IBinder>& cameraCallbacksRemote)
810{
811    sp<ProClient> clientPro;
812
813    for (int i = 0; i < mNumberOfCameras; ++i) {
814        Vector<size_t> removeIdx;
815
816        for (size_t j = 0; j < mProClientList[i].size(); ++j) {
817            wp<ProClient> cl = mProClientList[i][j];
818
819            sp<ProClient> clStrong = cl.promote();
820            if (clStrong != NULL && clStrong->getRemote() == cameraCallbacksRemote) {
821                clientPro = clStrong;
822                break;
823            } else if (clStrong == NULL) {
824                // mark to clean up dead ptr
825                removeIdx.push(j);
826            }
827        }
828
829        // remove stale ptrs (in reverse so the indices dont change)
830        for (ssize_t j = (ssize_t)removeIdx.size() - 1; j >= 0; --j) {
831            mProClientList[i].removeAt(removeIdx[j]);
832        }
833
834    }
835
836    return clientPro;
837}
838
839sp<CameraService::BasicClient> CameraService::findClientUnsafe(
840                        const wp<IBinder>& cameraClient, int& outIndex) {
841    sp<BasicClient> client;
842
843    for (int i = 0; i < mNumberOfCameras; i++) {
844
845        // This happens when we have already disconnected (or this is
846        // just another unused camera).
847        if (mClient[i] == 0) continue;
848
849        // Promote mClient. It can fail if we are called from this path:
850        // Client::~Client() -> disconnect() -> removeClientByRemote().
851        client = mClient[i].promote();
852
853        // Clean up stale client entry
854        if (client == NULL) {
855            mClient[i].clear();
856            continue;
857        }
858
859        if (cameraClient == client->getRemote()) {
860            // Found our camera
861            outIndex = i;
862            return client;
863        }
864    }
865
866    outIndex = -1;
867    return NULL;
868}
869
870CameraService::BasicClient* CameraService::getClientByIdUnsafe(int cameraId) {
871    if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
872    return mClient[cameraId].unsafe_get();
873}
874
875Mutex* CameraService::getClientLockById(int cameraId) {
876    if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
877    return &mClientLock[cameraId];
878}
879
880sp<CameraService::BasicClient> CameraService::getClientByRemote(
881                                const wp<IBinder>& cameraClient) {
882
883    // Declare this before the lock to make absolutely sure the
884    // destructor won't be called with the lock held.
885    sp<BasicClient> client;
886
887    Mutex::Autolock lock(mServiceLock);
888
889    int outIndex;
890    client = findClientUnsafe(cameraClient, outIndex);
891
892    return client;
893}
894
895status_t CameraService::onTransact(
896    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) {
897    // Permission checks
898    switch (code) {
899        case BnCameraService::CONNECT:
900        case BnCameraService::CONNECT_PRO:
901            const int pid = getCallingPid();
902            const int self_pid = getpid();
903            if (pid != self_pid) {
904                // we're called from a different process, do the real check
905                if (!checkCallingPermission(
906                        String16("android.permission.CAMERA"))) {
907                    const int uid = getCallingUid();
908                    ALOGE("Permission Denial: "
909                         "can't use the camera pid=%d, uid=%d", pid, uid);
910                    return PERMISSION_DENIED;
911                }
912            }
913            break;
914    }
915
916    return BnCameraService::onTransact(code, data, reply, flags);
917}
918
919// The reason we need this busy bit is a new CameraService::connect() request
920// may come in while the previous Client's destructor has not been run or is
921// still running. If the last strong reference of the previous Client is gone
922// but the destructor has not been finished, we should not allow the new Client
923// to be created because we need to wait for the previous Client to tear down
924// the hardware first.
925void CameraService::setCameraBusy(int cameraId) {
926    android_atomic_write(1, &mBusy[cameraId]);
927
928    ALOGV("setCameraBusy cameraId=%d", cameraId);
929}
930
931void CameraService::setCameraFree(int cameraId) {
932    android_atomic_write(0, &mBusy[cameraId]);
933
934    ALOGV("setCameraFree cameraId=%d", cameraId);
935}
936
937// We share the media players for shutter and recording sound for all clients.
938// A reference count is kept to determine when we will actually release the
939// media players.
940
941MediaPlayer* CameraService::newMediaPlayer(const char *file) {
942    MediaPlayer* mp = new MediaPlayer();
943    if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) {
944        mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
945        mp->prepare();
946    } else {
947        ALOGE("Failed to load CameraService sounds: %s", file);
948        return NULL;
949    }
950    return mp;
951}
952
953void CameraService::loadSound() {
954    Mutex::Autolock lock(mSoundLock);
955    LOG1("CameraService::loadSound ref=%d", mSoundRef);
956    if (mSoundRef++) return;
957
958    mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
959    mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
960}
961
962void CameraService::releaseSound() {
963    Mutex::Autolock lock(mSoundLock);
964    LOG1("CameraService::releaseSound ref=%d", mSoundRef);
965    if (--mSoundRef) return;
966
967    for (int i = 0; i < NUM_SOUNDS; i++) {
968        if (mSoundPlayer[i] != 0) {
969            mSoundPlayer[i]->disconnect();
970            mSoundPlayer[i].clear();
971        }
972    }
973}
974
975void CameraService::playSound(sound_kind kind) {
976    LOG1("playSound(%d)", kind);
977    Mutex::Autolock lock(mSoundLock);
978    sp<MediaPlayer> player = mSoundPlayer[kind];
979    if (player != 0) {
980        player->seekTo(0);
981        player->start();
982    }
983}
984
985// ----------------------------------------------------------------------------
986
987CameraService::Client::Client(const sp<CameraService>& cameraService,
988        const sp<ICameraClient>& cameraClient,
989        const String16& clientPackageName,
990        int cameraId, int cameraFacing,
991        int clientPid, uid_t clientUid,
992        int servicePid) :
993        CameraService::BasicClient(cameraService, cameraClient->asBinder(),
994                clientPackageName,
995                cameraId, cameraFacing,
996                clientPid, clientUid,
997                servicePid)
998{
999    int callingPid = getCallingPid();
1000    LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
1001
1002    mRemoteCallback = cameraClient;
1003
1004    cameraService->setCameraBusy(cameraId);
1005    cameraService->loadSound();
1006
1007    LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
1008}
1009
1010// tear down the client
1011CameraService::Client::~Client() {
1012    ALOGV("~Client");
1013    mDestructionStarted = true;
1014
1015    mCameraService->releaseSound();
1016    // unconditionally disconnect. function is idempotent
1017    Client::disconnect();
1018}
1019
1020CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
1021        const sp<IBinder>& remoteCallback,
1022        const String16& clientPackageName,
1023        int cameraId, int cameraFacing,
1024        int clientPid, uid_t clientUid,
1025        int servicePid):
1026        mClientPackageName(clientPackageName)
1027{
1028    mCameraService = cameraService;
1029    mRemoteBinder = remoteCallback;
1030    mCameraId = cameraId;
1031    mCameraFacing = cameraFacing;
1032    mClientPid = clientPid;
1033    mClientUid = clientUid;
1034    mServicePid = servicePid;
1035    mOpsActive = false;
1036    mDestructionStarted = false;
1037}
1038
1039CameraService::BasicClient::~BasicClient() {
1040    ALOGV("~BasicClient");
1041    mDestructionStarted = true;
1042}
1043
1044void CameraService::BasicClient::disconnect() {
1045    ALOGV("BasicClient::disconnect");
1046    mCameraService->removeClientByRemote(mRemoteBinder);
1047    // client shouldn't be able to call into us anymore
1048    mClientPid = 0;
1049}
1050
1051status_t CameraService::BasicClient::startCameraOps() {
1052    int32_t res;
1053
1054    mOpsCallback = new OpsCallback(this);
1055
1056    {
1057        ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
1058              __FUNCTION__, String8(mClientPackageName).string(), mClientUid);
1059    }
1060
1061    mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
1062            mClientPackageName, mOpsCallback);
1063    res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
1064            mClientUid, mClientPackageName);
1065
1066    if (res != AppOpsManager::MODE_ALLOWED) {
1067        ALOGI("Camera %d: Access for \"%s\" has been revoked",
1068                mCameraId, String8(mClientPackageName).string());
1069        return PERMISSION_DENIED;
1070    }
1071    mOpsActive = true;
1072    return OK;
1073}
1074
1075status_t CameraService::BasicClient::finishCameraOps() {
1076    if (mOpsActive) {
1077        mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
1078                mClientPackageName);
1079        mOpsActive = false;
1080    }
1081    mAppOpsManager.stopWatchingMode(mOpsCallback);
1082    mOpsCallback.clear();
1083
1084    return OK;
1085}
1086
1087void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
1088    String8 name(packageName);
1089    String8 myName(mClientPackageName);
1090
1091    if (op != AppOpsManager::OP_CAMERA) {
1092        ALOGW("Unexpected app ops notification received: %d", op);
1093        return;
1094    }
1095
1096    int32_t res;
1097    res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
1098            mClientUid, mClientPackageName);
1099    ALOGV("checkOp returns: %d, %s ", res,
1100            res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
1101            res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
1102            res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
1103            "UNKNOWN");
1104
1105    if (res != AppOpsManager::MODE_ALLOWED) {
1106        ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
1107                myName.string());
1108        // Reset the client PID to allow server-initiated disconnect,
1109        // and to prevent further calls by client.
1110        mClientPid = getCallingPid();
1111        notifyError();
1112        disconnect();
1113    }
1114}
1115
1116// ----------------------------------------------------------------------------
1117
1118Mutex* CameraService::Client::getClientLockFromCookie(void* user) {
1119    return gCameraService->getClientLockById((int)(intptr_t) user);
1120}
1121
1122// Provide client pointer for callbacks. Client lock returned from getClientLockFromCookie should
1123// be acquired for this to be safe
1124CameraService::Client* CameraService::Client::getClientFromCookie(void* user) {
1125    BasicClient *basicClient = gCameraService->getClientByIdUnsafe((int)(intptr_t) user);
1126    // OK: only CameraClient calls this, and they already cast anyway.
1127    Client* client = static_cast<Client*>(basicClient);
1128
1129    // This could happen if the Client is in the process of shutting down (the
1130    // last strong reference is gone, but the destructor hasn't finished
1131    // stopping the hardware).
1132    if (client == NULL) return NULL;
1133
1134    // destruction already started, so should not be accessed
1135    if (client->mDestructionStarted) return NULL;
1136
1137    return client;
1138}
1139
1140void CameraService::Client::notifyError() {
1141    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1142}
1143
1144// NOTE: function is idempotent
1145void CameraService::Client::disconnect() {
1146    ALOGV("Client::disconnect");
1147    BasicClient::disconnect();
1148    mCameraService->setCameraFree(mCameraId);
1149
1150    StatusVector rejectSourceStates;
1151    rejectSourceStates.push_back(ICameraServiceListener::STATUS_NOT_PRESENT);
1152    rejectSourceStates.push_back(ICameraServiceListener::STATUS_ENUMERATING);
1153
1154    // Transition to PRESENT if the camera is not in either of above 2 states
1155    mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
1156                                 mCameraId,
1157                                 &rejectSourceStates);
1158}
1159
1160CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
1161        mClient(client) {
1162}
1163
1164void CameraService::Client::OpsCallback::opChanged(int32_t op,
1165        const String16& packageName) {
1166    sp<BasicClient> client = mClient.promote();
1167    if (client != NULL) {
1168        client->opChanged(op, packageName);
1169    }
1170}
1171
1172// ----------------------------------------------------------------------------
1173//                  IProCamera
1174// ----------------------------------------------------------------------------
1175
1176CameraService::ProClient::ProClient(const sp<CameraService>& cameraService,
1177        const sp<IProCameraCallbacks>& remoteCallback,
1178        const String16& clientPackageName,
1179        int cameraId,
1180        int cameraFacing,
1181        int clientPid,
1182        uid_t clientUid,
1183        int servicePid)
1184        : CameraService::BasicClient(cameraService, remoteCallback->asBinder(),
1185                clientPackageName, cameraId, cameraFacing,
1186                clientPid,  clientUid, servicePid)
1187{
1188    mRemoteCallback = remoteCallback;
1189}
1190
1191CameraService::ProClient::~ProClient() {
1192}
1193
1194void CameraService::ProClient::notifyError() {
1195    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1196}
1197
1198// ----------------------------------------------------------------------------
1199
1200static const int kDumpLockRetries = 50;
1201static const int kDumpLockSleep = 60000;
1202
1203static bool tryLock(Mutex& mutex)
1204{
1205    bool locked = false;
1206    for (int i = 0; i < kDumpLockRetries; ++i) {
1207        if (mutex.tryLock() == NO_ERROR) {
1208            locked = true;
1209            break;
1210        }
1211        usleep(kDumpLockSleep);
1212    }
1213    return locked;
1214}
1215
1216status_t CameraService::dump(int fd, const Vector<String16>& args) {
1217    String8 result;
1218    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
1219        result.appendFormat("Permission Denial: "
1220                "can't dump CameraService from pid=%d, uid=%d\n",
1221                getCallingPid(),
1222                getCallingUid());
1223        write(fd, result.string(), result.size());
1224    } else {
1225        bool locked = tryLock(mServiceLock);
1226        // failed to lock - CameraService is probably deadlocked
1227        if (!locked) {
1228            result.append("CameraService may be deadlocked\n");
1229            write(fd, result.string(), result.size());
1230        }
1231
1232        bool hasClient = false;
1233        if (!mModule) {
1234            result = String8::format("No camera module available!\n");
1235            write(fd, result.string(), result.size());
1236            if (locked) mServiceLock.unlock();
1237            return NO_ERROR;
1238        }
1239
1240        result = String8::format("Camera module HAL API version: 0x%x\n",
1241                mModule->common.hal_api_version);
1242        result.appendFormat("Camera module API version: 0x%x\n",
1243                mModule->common.module_api_version);
1244        result.appendFormat("Camera module name: %s\n",
1245                mModule->common.name);
1246        result.appendFormat("Camera module author: %s\n",
1247                mModule->common.author);
1248        result.appendFormat("Number of camera devices: %d\n\n", mNumberOfCameras);
1249        write(fd, result.string(), result.size());
1250        for (int i = 0; i < mNumberOfCameras; i++) {
1251            result = String8::format("Camera %d static information:\n", i);
1252            camera_info info;
1253
1254            status_t rc = mModule->get_camera_info(i, &info);
1255            if (rc != OK) {
1256                result.appendFormat("  Error reading static information!\n");
1257                write(fd, result.string(), result.size());
1258            } else {
1259                result.appendFormat("  Facing: %s\n",
1260                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
1261                result.appendFormat("  Orientation: %d\n", info.orientation);
1262                int deviceVersion;
1263                if (mModule->common.module_api_version <
1264                        CAMERA_MODULE_API_VERSION_2_0) {
1265                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
1266                } else {
1267                    deviceVersion = info.device_version;
1268                }
1269                result.appendFormat("  Device version: 0x%x\n", deviceVersion);
1270                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
1271                    result.appendFormat("  Device static metadata:\n");
1272                    write(fd, result.string(), result.size());
1273                    dump_indented_camera_metadata(info.static_camera_characteristics,
1274                            fd, 2, 4);
1275                } else {
1276                    write(fd, result.string(), result.size());
1277                }
1278            }
1279
1280            sp<BasicClient> client = mClient[i].promote();
1281            if (client == 0) {
1282                result = String8::format("  Device is closed, no client instance\n");
1283                write(fd, result.string(), result.size());
1284                continue;
1285            }
1286            hasClient = true;
1287            result = String8::format("  Device is open. Client instance dump:\n");
1288            write(fd, result.string(), result.size());
1289            client->dump(fd, args);
1290        }
1291        if (!hasClient) {
1292            result = String8::format("\nNo active camera clients yet.\n");
1293            write(fd, result.string(), result.size());
1294        }
1295
1296        if (locked) mServiceLock.unlock();
1297
1298        // Dump camera traces if there were any
1299        write(fd, "\n", 1);
1300        camera3::CameraTraces::dump(fd, args);
1301
1302        // change logging level
1303        int n = args.size();
1304        for (int i = 0; i + 1 < n; i++) {
1305            String16 verboseOption("-v");
1306            if (args[i] == verboseOption) {
1307                String8 levelStr(args[i+1]);
1308                int level = atoi(levelStr.string());
1309                result = String8::format("\nSetting log level to %d.\n", level);
1310                setLogLevel(level);
1311                write(fd, result.string(), result.size());
1312            }
1313        }
1314
1315    }
1316    return NO_ERROR;
1317}
1318
1319/*virtual*/void CameraService::binderDied(
1320    const wp<IBinder> &who) {
1321
1322    /**
1323      * While tempting to promote the wp<IBinder> into a sp,
1324      * it's actually not supported by the binder driver
1325      */
1326
1327    ALOGV("java clients' binder died");
1328
1329    sp<BasicClient> cameraClient = getClientByRemote(who);
1330
1331    if (cameraClient == 0) {
1332        ALOGV("java clients' binder death already cleaned up (normal case)");
1333        return;
1334    }
1335
1336    ALOGW("Disconnecting camera client %p since the binder for it "
1337          "died (this pid %d)", cameraClient.get(), getCallingPid());
1338
1339    cameraClient->disconnect();
1340
1341}
1342
1343void CameraService::updateStatus(ICameraServiceListener::Status status,
1344                                 int32_t cameraId,
1345                                 const StatusVector *rejectSourceStates) {
1346    // do not lock mServiceLock here or can get into a deadlock from
1347    //  connect() -> ProClient::disconnect -> updateStatus
1348    Mutex::Autolock lock(mStatusMutex);
1349
1350    ICameraServiceListener::Status oldStatus = mStatusList[cameraId];
1351
1352    mStatusList[cameraId] = status;
1353
1354    if (oldStatus != status) {
1355        ALOGV("%s: Status has changed for camera ID %d from 0x%x to 0x%x",
1356              __FUNCTION__, cameraId, (uint32_t)oldStatus, (uint32_t)status);
1357
1358        if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT &&
1359            (status != ICameraServiceListener::STATUS_PRESENT &&
1360             status != ICameraServiceListener::STATUS_ENUMERATING)) {
1361
1362            ALOGW("%s: From NOT_PRESENT can only transition into PRESENT"
1363                  " or ENUMERATING", __FUNCTION__);
1364            mStatusList[cameraId] = oldStatus;
1365            return;
1366        }
1367
1368        if (rejectSourceStates != NULL) {
1369            const StatusVector &rejectList = *rejectSourceStates;
1370            StatusVector::const_iterator it = rejectList.begin();
1371
1372            /**
1373             * Sometimes we want to conditionally do a transition.
1374             * For example if a client disconnects, we want to go to PRESENT
1375             * only if we weren't already in NOT_PRESENT or ENUMERATING.
1376             */
1377            for (; it != rejectList.end(); ++it) {
1378                if (oldStatus == *it) {
1379                    ALOGV("%s: Rejecting status transition for Camera ID %d, "
1380                          " since the source state was was in one of the bad "
1381                          " states.", __FUNCTION__, cameraId);
1382                    mStatusList[cameraId] = oldStatus;
1383                    return;
1384                }
1385            }
1386        }
1387
1388        /**
1389          * ProClients lose their exclusive lock.
1390          * - Done before the CameraClient can initialize the HAL device,
1391          *   since we want to be able to close it before they get to initialize
1392          */
1393        if (status == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1394            Vector<wp<ProClient> > proClients(mProClientList[cameraId]);
1395            Vector<wp<ProClient> >::const_iterator it;
1396
1397            for (it = proClients.begin(); it != proClients.end(); ++it) {
1398                sp<ProClient> proCl = it->promote();
1399                if (proCl.get() != NULL) {
1400                    proCl->onExclusiveLockStolen();
1401                }
1402            }
1403        }
1404
1405        Vector<sp<ICameraServiceListener> >::const_iterator it;
1406        for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1407            (*it)->onStatusChanged(status, cameraId);
1408        }
1409    }
1410}
1411
1412ICameraServiceListener::Status CameraService::getStatus(int cameraId) const {
1413    if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
1414        ALOGE("%s: Invalid camera ID %d", __FUNCTION__, cameraId);
1415        return ICameraServiceListener::STATUS_UNKNOWN;
1416    }
1417
1418    Mutex::Autolock al(mStatusMutex);
1419    return mStatusList[cameraId];
1420}
1421
1422}; // namespace android
1423