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 ATRACE_TAG ATRACE_TAG_CAMERA
19//#define LOG_NDEBUG 0
20
21#include <algorithm>
22#include <climits>
23#include <stdio.h>
24#include <cstring>
25#include <ctime>
26#include <string>
27#include <sys/types.h>
28#include <inttypes.h>
29#include <pthread.h>
30
31#include <android/hardware/ICamera.h>
32#include <android/hardware/ICameraClient.h>
33
34#include <binder/AppOpsManager.h>
35#include <binder/IPCThreadState.h>
36#include <binder/IServiceManager.h>
37#include <binder/MemoryBase.h>
38#include <binder/MemoryHeapBase.h>
39#include <binder/ProcessInfoService.h>
40#include <cutils/atomic.h>
41#include <cutils/properties.h>
42#include <gui/Surface.h>
43#include <hardware/hardware.h>
44#include <memunreachable/memunreachable.h>
45#include <media/AudioSystem.h>
46#include <media/IMediaHTTPService.h>
47#include <media/mediaplayer.h>
48#include <mediautils/BatteryNotifier.h>
49#include <utils/Errors.h>
50#include <utils/Log.h>
51#include <utils/String16.h>
52#include <utils/Trace.h>
53#include <private/android_filesystem_config.h>
54#include <system/camera_vendor_tags.h>
55#include <system/camera_metadata.h>
56#include <system/camera.h>
57
58#include "CameraService.h"
59#include "api1/CameraClient.h"
60#include "api1/Camera2Client.h"
61#include "api2/CameraDeviceClient.h"
62#include "utils/CameraTraces.h"
63
64namespace {
65    const char* kPermissionServiceName = "permission";
66}; // namespace anonymous
67
68namespace android {
69
70using binder::Status;
71using namespace hardware;
72
73// ----------------------------------------------------------------------------
74// Logging support -- this is for debugging only
75// Use "adb shell dumpsys media.camera -v 1" to change it.
76volatile int32_t gLogLevel = 0;
77
78#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__);
79#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__);
80
81static void setLogLevel(int level) {
82    android_atomic_write(level, &gLogLevel);
83}
84
85// Convenience methods for constructing binder::Status objects for error returns
86
87#define STATUS_ERROR(errorCode, errorString) \
88    binder::Status::fromServiceSpecificError(errorCode, \
89            String8::format("%s:%d: %s", __FUNCTION__, __LINE__, errorString))
90
91#define STATUS_ERROR_FMT(errorCode, errorString, ...) \
92    binder::Status::fromServiceSpecificError(errorCode, \
93            String8::format("%s:%d: " errorString, __FUNCTION__, __LINE__, \
94                    __VA_ARGS__))
95
96// ----------------------------------------------------------------------------
97
98extern "C" {
99static void camera_device_status_change(
100        const struct camera_module_callbacks* callbacks,
101        int camera_id,
102        int new_status) {
103    sp<CameraService> cs = const_cast<CameraService*>(
104            static_cast<const CameraService*>(callbacks));
105
106    cs->onDeviceStatusChanged(static_cast<camera_device_status_t>(camera_id),
107            static_cast<camera_device_status_t>(new_status));
108}
109
110static void torch_mode_status_change(
111        const struct camera_module_callbacks* callbacks,
112        const char* camera_id,
113        int new_status) {
114    if (!callbacks || !camera_id) {
115        ALOGE("%s invalid parameters. callbacks %p, camera_id %p", __FUNCTION__,
116                callbacks, camera_id);
117    }
118    sp<CameraService> cs = const_cast<CameraService*>(
119                                static_cast<const CameraService*>(callbacks));
120
121    int32_t status;
122    switch (new_status) {
123        case TORCH_MODE_STATUS_NOT_AVAILABLE:
124            status = ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE;
125            break;
126        case TORCH_MODE_STATUS_AVAILABLE_OFF:
127            status = ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF;
128            break;
129        case TORCH_MODE_STATUS_AVAILABLE_ON:
130            status = ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON;
131            break;
132        default:
133            ALOGE("Unknown torch status %d", new_status);
134            return;
135    }
136
137    cs->onTorchStatusChanged(
138        String8(camera_id),
139        status);
140}
141} // extern "C"
142
143// ----------------------------------------------------------------------------
144
145// This is ugly and only safe if we never re-create the CameraService, but
146// should be ok for now.
147static CameraService *gCameraService;
148
149CameraService::CameraService() :
150        mEventLog(DEFAULT_EVENT_LOG_LENGTH),
151        mNumberOfCameras(0), mNumberOfNormalCameras(0),
152        mSoundRef(0), mModule(nullptr) {
153    ALOGI("CameraService started (pid=%d)", getpid());
154    gCameraService = this;
155
156    this->camera_device_status_change = android::camera_device_status_change;
157    this->torch_mode_status_change = android::torch_mode_status_change;
158
159    mServiceLockWrapper = std::make_shared<WaitableMutexWrapper>(&mServiceLock);
160}
161
162void CameraService::onFirstRef()
163{
164    ALOGI("CameraService process starting");
165
166    BnCameraService::onFirstRef();
167
168    // Update battery life tracking if service is restarting
169    BatteryNotifier& notifier(BatteryNotifier::getInstance());
170    notifier.noteResetCamera();
171    notifier.noteResetFlashlight();
172
173    camera_module_t *rawModule;
174    int err = hw_get_module(CAMERA_HARDWARE_MODULE_ID,
175            (const hw_module_t **)&rawModule);
176    if (err < 0) {
177        ALOGE("Could not load camera HAL module: %d (%s)", err, strerror(-err));
178        logServiceError("Could not load camera HAL module", err);
179        return;
180    }
181
182    mModule = new CameraModule(rawModule);
183    err = mModule->init();
184    if (err != OK) {
185        ALOGE("Could not initialize camera HAL module: %d (%s)", err,
186            strerror(-err));
187        logServiceError("Could not initialize camera HAL module", err);
188
189        delete mModule;
190        mModule = nullptr;
191        return;
192    }
193    ALOGI("Loaded \"%s\" camera module", mModule->getModuleName());
194
195    mNumberOfCameras = mModule->getNumberOfCameras();
196    mNumberOfNormalCameras = mNumberOfCameras;
197
198    // Setup vendor tags before we call get_camera_info the first time
199    // because HAL might need to setup static vendor keys in get_camera_info
200    VendorTagDescriptor::clearGlobalVendorTagDescriptor();
201    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_2) {
202        setUpVendorTags();
203    }
204
205    mFlashlight = new CameraFlashlight(*mModule, *this);
206    status_t res = mFlashlight->findFlashUnits();
207    if (res) {
208        // impossible because we haven't open any camera devices.
209        ALOGE("Failed to find flash units.");
210    }
211
212    int latestStrangeCameraId = INT_MAX;
213    for (int i = 0; i < mNumberOfCameras; i++) {
214        String8 cameraId = String8::format("%d", i);
215
216        // Get camera info
217
218        struct camera_info info;
219        bool haveInfo = true;
220        status_t rc = mModule->getCameraInfo(i, &info);
221        if (rc != NO_ERROR) {
222            ALOGE("%s: Received error loading camera info for device %d, cost and"
223                    " conflicting devices fields set to defaults for this device.",
224                    __FUNCTION__, i);
225            haveInfo = false;
226        }
227
228        // Check for backwards-compatibility support
229        if (haveInfo) {
230            if (checkCameraCapabilities(i, info, &latestStrangeCameraId) != OK) {
231                delete mModule;
232                mModule = nullptr;
233                return;
234            }
235        }
236
237        // Defaults to use for cost and conflicting devices
238        int cost = 100;
239        char** conflicting_devices = nullptr;
240        size_t conflicting_devices_length = 0;
241
242        // If using post-2.4 module version, query the cost + conflicting devices from the HAL
243        if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_4 && haveInfo) {
244            cost = info.resource_cost;
245            conflicting_devices = info.conflicting_devices;
246            conflicting_devices_length = info.conflicting_devices_length;
247        }
248
249        std::set<String8> conflicting;
250        for (size_t i = 0; i < conflicting_devices_length; i++) {
251            conflicting.emplace(String8(conflicting_devices[i]));
252        }
253
254        // Initialize state for each camera device
255        {
256            Mutex::Autolock lock(mCameraStatesLock);
257            mCameraStates.emplace(cameraId, std::make_shared<CameraState>(cameraId, cost,
258                    conflicting));
259        }
260
261        if (mFlashlight->hasFlashUnit(cameraId)) {
262            mTorchStatusMap.add(cameraId,
263                    ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF);
264        }
265    }
266
267    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_1) {
268        mModule->setCallbacks(this);
269    }
270
271    CameraService::pingCameraServiceProxy();
272}
273
274sp<ICameraServiceProxy> CameraService::getCameraServiceProxy() {
275    sp<IServiceManager> sm = defaultServiceManager();
276    sp<IBinder> binder = sm->getService(String16("media.camera.proxy"));
277    if (binder == nullptr) {
278        return nullptr;
279    }
280    sp<ICameraServiceProxy> proxyBinder = interface_cast<ICameraServiceProxy>(binder);
281    return proxyBinder;
282}
283
284void CameraService::pingCameraServiceProxy() {
285    sp<ICameraServiceProxy> proxyBinder = getCameraServiceProxy();
286    if (proxyBinder == nullptr) return;
287    proxyBinder->pingForUserUpdate();
288}
289
290CameraService::~CameraService() {
291    if (mModule) {
292        delete mModule;
293        mModule = nullptr;
294    }
295    VendorTagDescriptor::clearGlobalVendorTagDescriptor();
296    gCameraService = nullptr;
297}
298
299void CameraService::onDeviceStatusChanged(camera_device_status_t  cameraId,
300        camera_device_status_t newStatus) {
301    ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__,
302          cameraId, newStatus);
303
304    String8 id = String8::format("%d", cameraId);
305    std::shared_ptr<CameraState> state = getCameraState(id);
306
307    if (state == nullptr) {
308        ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId);
309        return;
310    }
311
312    int32_t oldStatus = state->getStatus();
313
314    if (oldStatus == static_cast<int32_t>(newStatus)) {
315        ALOGE("%s: State transition to the same status %#x not allowed", __FUNCTION__, newStatus);
316        return;
317    }
318
319    if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) {
320        logDeviceRemoved(id, String8::format("Device status changed from %d to %d", oldStatus,
321                newStatus));
322        sp<BasicClient> clientToDisconnect;
323        {
324            // Don't do this in updateStatus to avoid deadlock over mServiceLock
325            Mutex::Autolock lock(mServiceLock);
326
327            // Set the device status to NOT_PRESENT, clients will no longer be able to connect
328            // to this device until the status changes
329            updateStatus(ICameraServiceListener::STATUS_NOT_PRESENT, id);
330
331            // Remove cached shim parameters
332            state->setShimParams(CameraParameters());
333
334            // Remove the client from the list of active clients
335            clientToDisconnect = removeClientLocked(id);
336
337            // Notify the client of disconnection
338            clientToDisconnect->notifyError(
339                    hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
340                    CaptureResultExtras{});
341        }
342
343        ALOGI("%s: Client for camera ID %s evicted due to device status change from HAL",
344                __FUNCTION__, id.string());
345
346        // Disconnect client
347        if (clientToDisconnect.get() != nullptr) {
348            // Ensure not in binder RPC so client disconnect PID checks work correctly
349            LOG_ALWAYS_FATAL_IF(getCallingPid() != getpid(),
350                    "onDeviceStatusChanged must be called from the camera service process!");
351            clientToDisconnect->disconnect();
352        }
353
354    } else {
355        if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
356            logDeviceAdded(id, String8::format("Device status changed from %d to %d", oldStatus,
357                    newStatus));
358        }
359        updateStatus(static_cast<int32_t>(newStatus), id);
360    }
361
362}
363
364void CameraService::onTorchStatusChanged(const String8& cameraId,
365        int32_t newStatus) {
366    Mutex::Autolock al(mTorchStatusMutex);
367    onTorchStatusChangedLocked(cameraId, newStatus);
368}
369
370void CameraService::onTorchStatusChangedLocked(const String8& cameraId,
371        int32_t newStatus) {
372    ALOGI("%s: Torch status changed for cameraId=%s, newStatus=%d",
373            __FUNCTION__, cameraId.string(), newStatus);
374
375    int32_t status;
376    status_t res = getTorchStatusLocked(cameraId, &status);
377    if (res) {
378        ALOGE("%s: cannot get torch status of camera %s: %s (%d)",
379                __FUNCTION__, cameraId.string(), strerror(-res), res);
380        return;
381    }
382    if (status == newStatus) {
383        return;
384    }
385
386    res = setTorchStatusLocked(cameraId, newStatus);
387    if (res) {
388        ALOGE("%s: Failed to set the torch status to %d: %s (%d)", __FUNCTION__,
389                (uint32_t)newStatus, strerror(-res), res);
390        return;
391    }
392
393    {
394        // Update battery life logging for flashlight
395        Mutex::Autolock al(mTorchUidMapMutex);
396        auto iter = mTorchUidMap.find(cameraId);
397        if (iter != mTorchUidMap.end()) {
398            int oldUid = iter->second.second;
399            int newUid = iter->second.first;
400            BatteryNotifier& notifier(BatteryNotifier::getInstance());
401            if (oldUid != newUid) {
402                // If the UID has changed, log the status and update current UID in mTorchUidMap
403                if (status == ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON) {
404                    notifier.noteFlashlightOff(cameraId, oldUid);
405                }
406                if (newStatus == ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON) {
407                    notifier.noteFlashlightOn(cameraId, newUid);
408                }
409                iter->second.second = newUid;
410            } else {
411                // If the UID has not changed, log the status
412                if (newStatus == ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON) {
413                    notifier.noteFlashlightOn(cameraId, oldUid);
414                } else {
415                    notifier.noteFlashlightOff(cameraId, oldUid);
416                }
417            }
418        }
419    }
420
421    {
422        Mutex::Autolock lock(mStatusListenerLock);
423        for (auto& i : mListenerList) {
424            i->onTorchStatusChanged(newStatus, String16{cameraId});
425        }
426    }
427}
428
429Status CameraService::getNumberOfCameras(int32_t type, int32_t* numCameras) {
430    ATRACE_CALL();
431    switch (type) {
432        case CAMERA_TYPE_BACKWARD_COMPATIBLE:
433            *numCameras = mNumberOfNormalCameras;
434            break;
435        case CAMERA_TYPE_ALL:
436            *numCameras = mNumberOfCameras;
437            break;
438        default:
439            ALOGW("%s: Unknown camera type %d",
440                    __FUNCTION__, type);
441            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
442                    "Unknown camera type %d", type);
443    }
444    return Status::ok();
445}
446
447Status CameraService::getCameraInfo(int cameraId,
448        CameraInfo* cameraInfo) {
449    ATRACE_CALL();
450    if (!mModule) {
451        return STATUS_ERROR(ERROR_DISCONNECTED,
452                "Camera subsystem is not available");
453    }
454
455    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
456        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT,
457                "CameraId is not valid");
458    }
459
460    struct camera_info info;
461    Status rc = filterGetInfoErrorCode(
462        mModule->getCameraInfo(cameraId, &info));
463
464    if (rc.isOk()) {
465        cameraInfo->facing = info.facing;
466        cameraInfo->orientation = info.orientation;
467        // CameraInfo is for android.hardware.Camera which does not
468        // support external camera facing. The closest approximation would be
469        // front camera.
470        if (cameraInfo->orientation == CAMERA_FACING_EXTERNAL) {
471            cameraInfo->orientation = CAMERA_FACING_FRONT;
472        }
473    }
474    return rc;
475}
476
477int CameraService::cameraIdToInt(const String8& cameraId) {
478    errno = 0;
479    size_t pos = 0;
480    int ret = stoi(std::string{cameraId.string()}, &pos);
481    if (errno != 0 || pos != cameraId.size()) {
482        return -1;
483    }
484    return ret;
485}
486
487Status CameraService::generateShimMetadata(int cameraId, /*out*/CameraMetadata* cameraInfo) {
488    ATRACE_CALL();
489
490    Status ret = Status::ok();
491
492    struct CameraInfo info;
493    if (!(ret = getCameraInfo(cameraId, &info)).isOk()) {
494        return ret;
495    }
496
497    CameraMetadata shimInfo;
498    int32_t orientation = static_cast<int32_t>(info.orientation);
499    status_t rc;
500    if ((rc = shimInfo.update(ANDROID_SENSOR_ORIENTATION, &orientation, 1)) != OK) {
501        return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
502                "Error updating metadata: %d (%s)", rc, strerror(-rc));
503    }
504
505    uint8_t facing = (info.facing == CAMERA_FACING_FRONT) ?
506            ANDROID_LENS_FACING_FRONT : ANDROID_LENS_FACING_BACK;
507    if ((rc = shimInfo.update(ANDROID_LENS_FACING, &facing, 1)) != OK) {
508        return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
509                "Error updating metadata: %d (%s)", rc, strerror(-rc));
510    }
511
512    CameraParameters shimParams;
513    if (!(ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)).isOk()) {
514        // Error logged by callee
515        return ret;
516    }
517
518    Vector<Size> sizes;
519    Vector<Size> jpegSizes;
520    Vector<int32_t> formats;
521    {
522        shimParams.getSupportedPreviewSizes(/*out*/sizes);
523        shimParams.getSupportedPreviewFormats(/*out*/formats);
524        shimParams.getSupportedPictureSizes(/*out*/jpegSizes);
525    }
526
527    // Always include IMPLEMENTATION_DEFINED
528    formats.add(HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED);
529
530    const size_t INTS_PER_CONFIG = 4;
531
532    // Build available stream configurations metadata
533    size_t streamConfigSize = (sizes.size() * formats.size() + jpegSizes.size()) * INTS_PER_CONFIG;
534
535    Vector<int32_t> streamConfigs;
536    streamConfigs.setCapacity(streamConfigSize);
537
538    for (size_t i = 0; i < formats.size(); ++i) {
539        for (size_t j = 0; j < sizes.size(); ++j) {
540            streamConfigs.add(formats[i]);
541            streamConfigs.add(sizes[j].width);
542            streamConfigs.add(sizes[j].height);
543            streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
544        }
545    }
546
547    for (size_t i = 0; i < jpegSizes.size(); ++i) {
548        streamConfigs.add(HAL_PIXEL_FORMAT_BLOB);
549        streamConfigs.add(jpegSizes[i].width);
550        streamConfigs.add(jpegSizes[i].height);
551        streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
552    }
553
554    if ((rc = shimInfo.update(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS,
555            streamConfigs.array(), streamConfigSize)) != OK) {
556        return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
557                "Error updating metadata: %d (%s)", rc, strerror(-rc));
558    }
559
560    int64_t fakeMinFrames[0];
561    // TODO: Fixme, don't fake min frame durations.
562    if ((rc = shimInfo.update(ANDROID_SCALER_AVAILABLE_MIN_FRAME_DURATIONS,
563            fakeMinFrames, 0)) != OK) {
564        return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
565                "Error updating metadata: %d (%s)", rc, strerror(-rc));
566    }
567
568    int64_t fakeStalls[0];
569    // TODO: Fixme, don't fake stall durations.
570    if ((rc = shimInfo.update(ANDROID_SCALER_AVAILABLE_STALL_DURATIONS,
571            fakeStalls, 0)) != OK) {
572        return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
573                "Error updating metadata: %d (%s)", rc, strerror(-rc));
574    }
575
576    *cameraInfo = shimInfo;
577    return ret;
578}
579
580Status CameraService::getCameraCharacteristics(int cameraId,
581                                                CameraMetadata* cameraInfo) {
582    ATRACE_CALL();
583    if (!cameraInfo) {
584        ALOGE("%s: cameraInfo is NULL", __FUNCTION__);
585        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "cameraInfo is NULL");
586    }
587
588    if (!mModule) {
589        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
590        return STATUS_ERROR(ERROR_DISCONNECTED,
591                "Camera subsystem is not available");;
592    }
593
594    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
595        ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId);
596        return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
597                "Invalid camera id: %d", cameraId);
598    }
599
600    int facing;
601    Status ret;
602    if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0 ||
603            getDeviceVersion(cameraId, &facing) < CAMERA_DEVICE_API_VERSION_3_0) {
604        /**
605         * Backwards compatibility mode for old HALs:
606         * - Convert CameraInfo into static CameraMetadata properties.
607         * - Retrieve cached CameraParameters for this camera.  If none exist,
608         *   attempt to open CameraClient and retrieve the CameraParameters.
609         * - Convert cached CameraParameters into static CameraMetadata
610         *   properties.
611         */
612        ALOGI("%s: Switching to HAL1 shim implementation...", __FUNCTION__);
613
614        ret = generateShimMetadata(cameraId, cameraInfo);
615    } else {
616        /**
617         * Normal HAL 2.1+ codepath.
618         */
619        struct camera_info info;
620        ret = filterGetInfoErrorCode(mModule->getCameraInfo(cameraId, &info));
621        if (ret.isOk()) {
622            *cameraInfo = info.static_camera_characteristics;
623        }
624    }
625
626    return ret;
627}
628
629int CameraService::getCallingPid() {
630    return IPCThreadState::self()->getCallingPid();
631}
632
633int CameraService::getCallingUid() {
634    return IPCThreadState::self()->getCallingUid();
635}
636
637String8 CameraService::getFormattedCurrentTime() {
638    time_t now = time(nullptr);
639    char formattedTime[64];
640    strftime(formattedTime, sizeof(formattedTime), "%m-%d %H:%M:%S", localtime(&now));
641    return String8(formattedTime);
642}
643
644int CameraService::getCameraPriorityFromProcState(int procState) {
645    // Find the priority for the camera usage based on the process state.  Higher priority clients
646    // win for evictions.
647    if (procState < 0) {
648        ALOGE("%s: Received invalid process state %d from ActivityManagerService!", __FUNCTION__,
649                procState);
650        return -1;
651    }
652    // Treat sleeping TOP processes the same as regular TOP processes, for
653    // access priority.  This is important for lock-screen camera launch scenarios
654    if (procState == PROCESS_STATE_TOP_SLEEPING) {
655        procState = PROCESS_STATE_TOP;
656    }
657    return INT_MAX - procState;
658}
659
660Status CameraService::getCameraVendorTagDescriptor(
661        /*out*/
662        hardware::camera2::params::VendorTagDescriptor* desc) {
663    ATRACE_CALL();
664    if (!mModule) {
665        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
666        return STATUS_ERROR(ERROR_DISCONNECTED, "Camera subsystem not available");
667    }
668    sp<VendorTagDescriptor> globalDescriptor = VendorTagDescriptor::getGlobalVendorTagDescriptor();
669    if (globalDescriptor != nullptr) {
670        *desc = *(globalDescriptor.get());
671    }
672    return Status::ok();
673}
674
675int CameraService::getDeviceVersion(int cameraId, int* facing) {
676    ATRACE_CALL();
677    struct camera_info info;
678    if (mModule->getCameraInfo(cameraId, &info) != OK) {
679        return -1;
680    }
681
682    int deviceVersion;
683    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) {
684        deviceVersion = info.device_version;
685    } else {
686        deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
687    }
688
689    if (facing) {
690        *facing = info.facing;
691    }
692
693    return deviceVersion;
694}
695
696Status CameraService::filterGetInfoErrorCode(status_t err) {
697    switch(err) {
698        case NO_ERROR:
699            return Status::ok();
700        case -EINVAL:
701            return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT,
702                    "CameraId is not valid for HAL module");
703        case -ENODEV:
704            return STATUS_ERROR(ERROR_DISCONNECTED,
705                    "Camera device not available");
706        default:
707            return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
708                    "Camera HAL encountered error %d: %s",
709                    err, strerror(-err));
710    }
711}
712
713bool CameraService::setUpVendorTags() {
714    ATRACE_CALL();
715    vendor_tag_ops_t vOps = vendor_tag_ops_t();
716
717    // Check if vendor operations have been implemented
718    if (!mModule->isVendorTagDefined()) {
719        ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__);
720        return false;
721    }
722
723    mModule->getVendorTagOps(&vOps);
724
725    // Ensure all vendor operations are present
726    if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL ||
727            vOps.get_section_name == NULL || vOps.get_tag_name == NULL ||
728            vOps.get_tag_type == NULL) {
729        ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions."
730               , __FUNCTION__);
731        return false;
732    }
733
734    // Read all vendor tag definitions into a descriptor
735    sp<VendorTagDescriptor> desc;
736    status_t res;
737    if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc))
738            != OK) {
739        ALOGE("%s: Could not generate descriptor from vendor tag operations,"
740              "received error %s (%d). Camera clients will not be able to use"
741              "vendor tags", __FUNCTION__, strerror(res), res);
742        return false;
743    }
744
745    // Set the global descriptor to use with camera metadata
746    VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc);
747    return true;
748}
749
750Status CameraService::makeClient(const sp<CameraService>& cameraService,
751        const sp<IInterface>& cameraCb, const String16& packageName, int cameraId,
752        int facing, int clientPid, uid_t clientUid, int servicePid, bool legacyMode,
753        int halVersion, int deviceVersion, apiLevel effectiveApiLevel,
754        /*out*/sp<BasicClient>* client) {
755
756    if (halVersion < 0 || halVersion == deviceVersion) {
757        // Default path: HAL version is unspecified by caller, create CameraClient
758        // based on device version reported by the HAL.
759        switch(deviceVersion) {
760          case CAMERA_DEVICE_API_VERSION_1_0:
761            if (effectiveApiLevel == API_1) {  // Camera1 API route
762                sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
763                *client = new CameraClient(cameraService, tmp, packageName, cameraId, facing,
764                        clientPid, clientUid, getpid(), legacyMode);
765            } else { // Camera2 API route
766                ALOGW("Camera using old HAL version: %d", deviceVersion);
767                return STATUS_ERROR_FMT(ERROR_DEPRECATED_HAL,
768                        "Camera device \"%d\" HAL version %d does not support camera2 API",
769                        cameraId, deviceVersion);
770            }
771            break;
772          case CAMERA_DEVICE_API_VERSION_3_0:
773          case CAMERA_DEVICE_API_VERSION_3_1:
774          case CAMERA_DEVICE_API_VERSION_3_2:
775          case CAMERA_DEVICE_API_VERSION_3_3:
776          case CAMERA_DEVICE_API_VERSION_3_4:
777            if (effectiveApiLevel == API_1) { // Camera1 API route
778                sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
779                *client = new Camera2Client(cameraService, tmp, packageName, cameraId, facing,
780                        clientPid, clientUid, servicePid, legacyMode);
781            } else { // Camera2 API route
782                sp<hardware::camera2::ICameraDeviceCallbacks> tmp =
783                        static_cast<hardware::camera2::ICameraDeviceCallbacks*>(cameraCb.get());
784                *client = new CameraDeviceClient(cameraService, tmp, packageName, cameraId,
785                        facing, clientPid, clientUid, servicePid);
786            }
787            break;
788          default:
789            // Should not be reachable
790            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
791            return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
792                    "Camera device \"%d\" has unknown HAL version %d",
793                    cameraId, deviceVersion);
794        }
795    } else {
796        // A particular HAL version is requested by caller. Create CameraClient
797        // based on the requested HAL version.
798        if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 &&
799            halVersion == CAMERA_DEVICE_API_VERSION_1_0) {
800            // Only support higher HAL version device opened as HAL1.0 device.
801            sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
802            *client = new CameraClient(cameraService, tmp, packageName, cameraId, facing,
803                    clientPid, clientUid, servicePid, legacyMode);
804        } else {
805            // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet.
806            ALOGE("Invalid camera HAL version %x: HAL %x device can only be"
807                    " opened as HAL %x device", halVersion, deviceVersion,
808                    CAMERA_DEVICE_API_VERSION_1_0);
809            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
810                    "Camera device \"%d\" (HAL version %d) cannot be opened as HAL version %d",
811                    cameraId, deviceVersion, halVersion);
812        }
813    }
814    return Status::ok();
815}
816
817String8 CameraService::toString(std::set<userid_t> intSet) {
818    String8 s("");
819    bool first = true;
820    for (userid_t i : intSet) {
821        if (first) {
822            s.appendFormat("%d", i);
823            first = false;
824        } else {
825            s.appendFormat(", %d", i);
826        }
827    }
828    return s;
829}
830
831Status CameraService::initializeShimMetadata(int cameraId) {
832    int uid = getCallingUid();
833
834    String16 internalPackageName("cameraserver");
835    String8 id = String8::format("%d", cameraId);
836    Status ret = Status::ok();
837    sp<Client> tmp = nullptr;
838    if (!(ret = connectHelper<ICameraClient,Client>(
839            sp<ICameraClient>{nullptr}, id, static_cast<int>(CAMERA_HAL_API_VERSION_UNSPECIFIED),
840            internalPackageName, uid, USE_CALLING_PID,
841            API_1, /*legacyMode*/ false, /*shimUpdateOnly*/ true,
842            /*out*/ tmp)
843            ).isOk()) {
844        ALOGE("%s: Error initializing shim metadata: %s", __FUNCTION__, ret.toString8().string());
845    }
846    return ret;
847}
848
849Status CameraService::getLegacyParametersLazy(int cameraId,
850        /*out*/
851        CameraParameters* parameters) {
852
853    ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId);
854
855    Status ret = Status::ok();
856
857    if (parameters == NULL) {
858        ALOGE("%s: parameters must not be null", __FUNCTION__);
859        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Parameters must not be null");
860    }
861
862    String8 id = String8::format("%d", cameraId);
863
864    // Check if we already have parameters
865    {
866        // Scope for service lock
867        Mutex::Autolock lock(mServiceLock);
868        auto cameraState = getCameraState(id);
869        if (cameraState == nullptr) {
870            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
871            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
872                    "Invalid camera ID: %s", id.string());
873        }
874        CameraParameters p = cameraState->getShimParams();
875        if (!p.isEmpty()) {
876            *parameters = p;
877            return ret;
878        }
879    }
880
881    int64_t token = IPCThreadState::self()->clearCallingIdentity();
882    ret = initializeShimMetadata(cameraId);
883    IPCThreadState::self()->restoreCallingIdentity(token);
884    if (!ret.isOk()) {
885        // Error already logged by callee
886        return ret;
887    }
888
889    // Check for parameters again
890    {
891        // Scope for service lock
892        Mutex::Autolock lock(mServiceLock);
893        auto cameraState = getCameraState(id);
894        if (cameraState == nullptr) {
895            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
896            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
897                    "Invalid camera ID: %s", id.string());
898        }
899        CameraParameters p = cameraState->getShimParams();
900        if (!p.isEmpty()) {
901            *parameters = p;
902            return ret;
903        }
904    }
905
906    ALOGE("%s: Parameters were not initialized, or were empty.  Device may not be present.",
907            __FUNCTION__);
908    return STATUS_ERROR(ERROR_INVALID_OPERATION, "Unable to initialize legacy parameters");
909}
910
911// Can camera service trust the caller based on the calling UID?
912static bool isTrustedCallingUid(uid_t uid) {
913    switch (uid) {
914        case AID_MEDIA:         // mediaserver
915        case AID_CAMERASERVER: // cameraserver
916            return true;
917        default:
918            return false;
919    }
920}
921
922Status CameraService::validateConnectLocked(const String8& cameraId,
923        const String8& clientName8, /*inout*/int& clientUid, /*inout*/int& clientPid,
924        /*out*/int& originalClientPid) const {
925
926    int callingPid = getCallingPid();
927    int callingUid = getCallingUid();
928
929    // Check if we can trust clientUid
930    if (clientUid == USE_CALLING_UID) {
931        clientUid = callingUid;
932    } else if (!isTrustedCallingUid(callingUid)) {
933        ALOGE("CameraService::connect X (calling PID %d, calling UID %d) rejected "
934                "(don't trust clientUid %d)", callingPid, callingUid, clientUid);
935        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
936                "Untrusted caller (calling PID %d, UID %d) trying to "
937                "forward camera access to camera %s for client %s (PID %d, UID %d)",
938                callingPid, callingUid, cameraId.string(),
939                clientName8.string(), clientUid, clientPid);
940    }
941
942    // Check if we can trust clientPid
943    if (clientPid == USE_CALLING_PID) {
944        clientPid = callingPid;
945    } else if (!isTrustedCallingUid(callingUid)) {
946        ALOGE("CameraService::connect X (calling PID %d, calling UID %d) rejected "
947                "(don't trust clientPid %d)", callingPid, callingUid, clientPid);
948        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
949                "Untrusted caller (calling PID %d, UID %d) trying to "
950                "forward camera access to camera %s for client %s (PID %d, UID %d)",
951                callingPid, callingUid, cameraId.string(),
952                clientName8.string(), clientUid, clientPid);
953    }
954
955    // If it's not calling from cameraserver, check the permission.
956    if (callingPid != getpid() &&
957            !checkPermission(String16("android.permission.CAMERA"), clientPid, clientUid)) {
958        ALOGE("Permission Denial: can't use the camera pid=%d, uid=%d", clientPid, clientUid);
959        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
960                "Caller \"%s\" (PID %d, UID %d) cannot open camera \"%s\" without camera permission",
961                clientName8.string(), clientUid, clientPid, cameraId.string());
962    }
963
964    // Only use passed in clientPid to check permission. Use calling PID as the client PID that's
965    // connected to camera service directly.
966    originalClientPid = clientPid;
967    clientPid = callingPid;
968
969    if (!mModule) {
970        ALOGE("CameraService::connect X (PID %d) rejected (camera HAL module not loaded)",
971                callingPid);
972        return STATUS_ERROR_FMT(ERROR_DISCONNECTED,
973                "No camera HAL module available to open camera device \"%s\"", cameraId.string());
974    }
975
976    if (getCameraState(cameraId) == nullptr) {
977        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
978                cameraId.string());
979        return STATUS_ERROR_FMT(ERROR_DISCONNECTED,
980                "No camera device with ID \"%s\" available", cameraId.string());
981    }
982
983    userid_t clientUserId = multiuser_get_user_id(clientUid);
984
985    // Only allow clients who are being used by the current foreground device user, unless calling
986    // from our own process.
987    if (callingPid != getpid() && (mAllowedUsers.find(clientUserId) == mAllowedUsers.end())) {
988        ALOGE("CameraService::connect X (PID %d) rejected (cannot connect from "
989                "device user %d, currently allowed device users: %s)", callingPid, clientUserId,
990                toString(mAllowedUsers).string());
991        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
992                "Callers from device user %d are not currently allowed to connect to camera \"%s\"",
993                clientUserId, cameraId.string());
994    }
995
996    status_t err = checkIfDeviceIsUsable(cameraId);
997    if (err != NO_ERROR) {
998        switch(err) {
999            case -ENODEV:
1000            case -EBUSY:
1001                return STATUS_ERROR_FMT(ERROR_DISCONNECTED,
1002                        "No camera device with ID \"%s\" currently available", cameraId.string());
1003            default:
1004                return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
1005                        "Unknown error connecting to ID \"%s\"", cameraId.string());
1006        }
1007    }
1008    return Status::ok();
1009}
1010
1011status_t CameraService::checkIfDeviceIsUsable(const String8& cameraId) const {
1012    auto cameraState = getCameraState(cameraId);
1013    int callingPid = getCallingPid();
1014    if (cameraState == nullptr) {
1015        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
1016                cameraId.string());
1017        return -ENODEV;
1018    }
1019
1020    int32_t currentStatus = cameraState->getStatus();
1021    if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
1022        ALOGE("CameraService::connect X (PID %d) rejected (camera %s is not connected)",
1023                callingPid, cameraId.string());
1024        return -ENODEV;
1025    } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
1026        ALOGE("CameraService::connect X (PID %d) rejected, (camera %s is initializing)",
1027                callingPid, cameraId.string());
1028        return -EBUSY;
1029    }
1030
1031    return NO_ERROR;
1032}
1033
1034void CameraService::finishConnectLocked(const sp<BasicClient>& client,
1035        const CameraService::DescriptorPtr& desc) {
1036
1037    // Make a descriptor for the incoming client
1038    auto clientDescriptor = CameraService::CameraClientManager::makeClientDescriptor(client, desc);
1039    auto evicted = mActiveClientManager.addAndEvict(clientDescriptor);
1040
1041    logConnected(desc->getKey(), static_cast<int>(desc->getOwnerId()),
1042            String8(client->getPackageName()));
1043
1044    if (evicted.size() > 0) {
1045        // This should never happen - clients should already have been removed in disconnect
1046        for (auto& i : evicted) {
1047            ALOGE("%s: Invalid state: Client for camera %s was not removed in disconnect",
1048                    __FUNCTION__, i->getKey().string());
1049        }
1050
1051        LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, clients not evicted properly",
1052                __FUNCTION__);
1053    }
1054
1055    // And register a death notification for the client callback. Do
1056    // this last to avoid Binder policy where a nested Binder
1057    // transaction might be pre-empted to service the client death
1058    // notification if the client process dies before linkToDeath is
1059    // invoked.
1060    sp<IBinder> remoteCallback = client->getRemote();
1061    if (remoteCallback != nullptr) {
1062        remoteCallback->linkToDeath(this);
1063    }
1064}
1065
1066status_t CameraService::handleEvictionsLocked(const String8& cameraId, int clientPid,
1067        apiLevel effectiveApiLevel, const sp<IBinder>& remoteCallback, const String8& packageName,
1068        /*out*/
1069        sp<BasicClient>* client,
1070        std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>* partial) {
1071    ATRACE_CALL();
1072    status_t ret = NO_ERROR;
1073    std::vector<DescriptorPtr> evictedClients;
1074    DescriptorPtr clientDescriptor;
1075    {
1076        if (effectiveApiLevel == API_1) {
1077            // If we are using API1, any existing client for this camera ID with the same remote
1078            // should be returned rather than evicted to allow MediaRecorder to work properly.
1079
1080            auto current = mActiveClientManager.get(cameraId);
1081            if (current != nullptr) {
1082                auto clientSp = current->getValue();
1083                if (clientSp.get() != nullptr) { // should never be needed
1084                    if (!clientSp->canCastToApiClient(effectiveApiLevel)) {
1085                        ALOGW("CameraService connect called from same client, but with a different"
1086                                " API level, evicting prior client...");
1087                    } else if (clientSp->getRemote() == remoteCallback) {
1088                        ALOGI("CameraService::connect X (PID %d) (second call from same"
1089                                " app binder, returning the same client)", clientPid);
1090                        *client = clientSp;
1091                        return NO_ERROR;
1092                    }
1093                }
1094            }
1095        }
1096
1097        // Get current active client PIDs
1098        std::vector<int> ownerPids(mActiveClientManager.getAllOwners());
1099        ownerPids.push_back(clientPid);
1100
1101        // Use the value +PROCESS_STATE_NONEXISTENT, to avoid taking
1102        // address of PROCESS_STATE_NONEXISTENT as a reference argument
1103        // for the vector constructor. PROCESS_STATE_NONEXISTENT does
1104        // not have an out-of-class definition.
1105        std::vector<int> priorities(ownerPids.size(), +PROCESS_STATE_NONEXISTENT);
1106
1107        // Get priorites of all active PIDs
1108        ProcessInfoService::getProcessStatesFromPids(ownerPids.size(), &ownerPids[0],
1109                /*out*/&priorities[0]);
1110
1111        // Update all active clients' priorities
1112        std::map<int,int> pidToPriorityMap;
1113        for (size_t i = 0; i < ownerPids.size() - 1; i++) {
1114            pidToPriorityMap.emplace(ownerPids[i], getCameraPriorityFromProcState(priorities[i]));
1115        }
1116        mActiveClientManager.updatePriorities(pidToPriorityMap);
1117
1118        // Get state for the given cameraId
1119        auto state = getCameraState(cameraId);
1120        if (state == nullptr) {
1121            ALOGE("CameraService::connect X (PID %d) rejected (no camera device with ID %s)",
1122                clientPid, cameraId.string());
1123            // Should never get here because validateConnectLocked should have errored out
1124            return BAD_VALUE;
1125        }
1126
1127        // Make descriptor for incoming client
1128        clientDescriptor = CameraClientManager::makeClientDescriptor(cameraId,
1129                sp<BasicClient>{nullptr}, static_cast<int32_t>(state->getCost()),
1130                state->getConflicting(),
1131                getCameraPriorityFromProcState(priorities[priorities.size() - 1]), clientPid);
1132
1133        // Find clients that would be evicted
1134        auto evicted = mActiveClientManager.wouldEvict(clientDescriptor);
1135
1136        // If the incoming client was 'evicted,' higher priority clients have the camera in the
1137        // background, so we cannot do evictions
1138        if (std::find(evicted.begin(), evicted.end(), clientDescriptor) != evicted.end()) {
1139            ALOGE("CameraService::connect X (PID %d) rejected (existing client(s) with higher"
1140                    " priority).", clientPid);
1141
1142            sp<BasicClient> clientSp = clientDescriptor->getValue();
1143            String8 curTime = getFormattedCurrentTime();
1144            auto incompatibleClients =
1145                    mActiveClientManager.getIncompatibleClients(clientDescriptor);
1146
1147            String8 msg = String8::format("%s : DENIED connect device %s client for package %s "
1148                    "(PID %d, priority %d) due to eviction policy", curTime.string(),
1149                    cameraId.string(), packageName.string(), clientPid,
1150                    getCameraPriorityFromProcState(priorities[priorities.size() - 1]));
1151
1152            for (auto& i : incompatibleClients) {
1153                msg.appendFormat("\n   - Blocked by existing device %s client for package %s"
1154                        "(PID %" PRId32 ", priority %" PRId32 ")", i->getKey().string(),
1155                        String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(),
1156                        i->getPriority());
1157                ALOGE("   Conflicts with: Device %s, client package %s (PID %"
1158                        PRId32 ", priority %" PRId32 ")", i->getKey().string(),
1159                        String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(),
1160                        i->getPriority());
1161            }
1162
1163            // Log the client's attempt
1164            Mutex::Autolock l(mLogLock);
1165            mEventLog.add(msg);
1166
1167            return -EBUSY;
1168        }
1169
1170        for (auto& i : evicted) {
1171            sp<BasicClient> clientSp = i->getValue();
1172            if (clientSp.get() == nullptr) {
1173                ALOGE("%s: Invalid state: Null client in active client list.", __FUNCTION__);
1174
1175                // TODO: Remove this
1176                LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, null client in active list",
1177                        __FUNCTION__);
1178                mActiveClientManager.remove(i);
1179                continue;
1180            }
1181
1182            ALOGE("CameraService::connect evicting conflicting client for camera ID %s",
1183                    i->getKey().string());
1184            evictedClients.push_back(i);
1185
1186            // Log the clients evicted
1187            logEvent(String8::format("EVICT device %s client held by package %s (PID"
1188                    " %" PRId32 ", priority %" PRId32 ")\n   - Evicted by device %s client for"
1189                    " package %s (PID %d, priority %" PRId32 ")",
1190                    i->getKey().string(), String8{clientSp->getPackageName()}.string(),
1191                    i->getOwnerId(), i->getPriority(), cameraId.string(),
1192                    packageName.string(), clientPid,
1193                    getCameraPriorityFromProcState(priorities[priorities.size() - 1])));
1194
1195            // Notify the client of disconnection
1196            clientSp->notifyError(hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
1197                    CaptureResultExtras());
1198        }
1199    }
1200
1201    // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1202    // other clients from connecting in mServiceLockWrapper if held
1203    mServiceLock.unlock();
1204
1205    // Clear caller identity temporarily so client disconnect PID checks work correctly
1206    int64_t token = IPCThreadState::self()->clearCallingIdentity();
1207
1208    // Destroy evicted clients
1209    for (auto& i : evictedClients) {
1210        // Disconnect is blocking, and should only have returned when HAL has cleaned up
1211        i->getValue()->disconnect(); // Clients will remove themselves from the active client list
1212    }
1213
1214    IPCThreadState::self()->restoreCallingIdentity(token);
1215
1216    for (const auto& i : evictedClients) {
1217        ALOGV("%s: Waiting for disconnect to complete for client for device %s (PID %" PRId32 ")",
1218                __FUNCTION__, i->getKey().string(), i->getOwnerId());
1219        ret = mActiveClientManager.waitUntilRemoved(i, DEFAULT_DISCONNECT_TIMEOUT_NS);
1220        if (ret == TIMED_OUT) {
1221            ALOGE("%s: Timed out waiting for client for device %s to disconnect, "
1222                    "current clients:\n%s", __FUNCTION__, i->getKey().string(),
1223                    mActiveClientManager.toString().string());
1224            return -EBUSY;
1225        }
1226        if (ret != NO_ERROR) {
1227            ALOGE("%s: Received error waiting for client for device %s to disconnect: %s (%d), "
1228                    "current clients:\n%s", __FUNCTION__, i->getKey().string(), strerror(-ret),
1229                    ret, mActiveClientManager.toString().string());
1230            return ret;
1231        }
1232    }
1233
1234    evictedClients.clear();
1235
1236    // Once clients have been disconnected, relock
1237    mServiceLock.lock();
1238
1239    // Check again if the device was unplugged or something while we weren't holding mServiceLock
1240    if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) {
1241        return ret;
1242    }
1243
1244    *partial = clientDescriptor;
1245    return NO_ERROR;
1246}
1247
1248Status CameraService::connect(
1249        const sp<ICameraClient>& cameraClient,
1250        int cameraId,
1251        const String16& clientPackageName,
1252        int clientUid,
1253        int clientPid,
1254        /*out*/
1255        sp<ICamera>* device) {
1256
1257    ATRACE_CALL();
1258    Status ret = Status::ok();
1259    String8 id = String8::format("%d", cameraId);
1260    sp<Client> client = nullptr;
1261    ret = connectHelper<ICameraClient,Client>(cameraClient, id,
1262            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, clientUid, clientPid, API_1,
1263            /*legacyMode*/ false, /*shimUpdateOnly*/ false,
1264            /*out*/client);
1265
1266    if(!ret.isOk()) {
1267        logRejected(id, getCallingPid(), String8(clientPackageName),
1268                ret.toString8());
1269        return ret;
1270    }
1271
1272    *device = client;
1273    return ret;
1274}
1275
1276Status CameraService::connectLegacy(
1277        const sp<ICameraClient>& cameraClient,
1278        int cameraId, int halVersion,
1279        const String16& clientPackageName,
1280        int clientUid,
1281        /*out*/
1282        sp<ICamera>* device) {
1283
1284    ATRACE_CALL();
1285    String8 id = String8::format("%d", cameraId);
1286    int apiVersion = mModule->getModuleApiVersion();
1287    if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED &&
1288            apiVersion < CAMERA_MODULE_API_VERSION_2_3) {
1289        /*
1290         * Either the HAL version is unspecified in which case this just creates
1291         * a camera client selected by the latest device version, or
1292         * it's a particular version in which case the HAL must supported
1293         * the open_legacy call
1294         */
1295        String8 msg = String8::format("Camera HAL module version %x too old for connectLegacy!",
1296                apiVersion);
1297        ALOGE("%s: %s",
1298                __FUNCTION__, msg.string());
1299        logRejected(id, getCallingPid(), String8(clientPackageName),
1300                msg);
1301        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string());
1302    }
1303
1304    Status ret = Status::ok();
1305    sp<Client> client = nullptr;
1306    ret = connectHelper<ICameraClient,Client>(cameraClient, id, halVersion,
1307            clientPackageName, clientUid, USE_CALLING_PID, API_1,
1308            /*legacyMode*/ true, /*shimUpdateOnly*/ false,
1309            /*out*/client);
1310
1311    if(!ret.isOk()) {
1312        logRejected(id, getCallingPid(), String8(clientPackageName),
1313                ret.toString8());
1314        return ret;
1315    }
1316
1317    *device = client;
1318    return ret;
1319}
1320
1321Status CameraService::connectDevice(
1322        const sp<hardware::camera2::ICameraDeviceCallbacks>& cameraCb,
1323        int cameraId,
1324        const String16& clientPackageName,
1325        int clientUid,
1326        /*out*/
1327        sp<hardware::camera2::ICameraDeviceUser>* device) {
1328
1329    ATRACE_CALL();
1330    Status ret = Status::ok();
1331    String8 id = String8::format("%d", cameraId);
1332    sp<CameraDeviceClient> client = nullptr;
1333    ret = connectHelper<hardware::camera2::ICameraDeviceCallbacks,CameraDeviceClient>(cameraCb, id,
1334            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName,
1335            clientUid, USE_CALLING_PID, API_2,
1336            /*legacyMode*/ false, /*shimUpdateOnly*/ false,
1337            /*out*/client);
1338
1339    if(!ret.isOk()) {
1340        logRejected(id, getCallingPid(), String8(clientPackageName),
1341                ret.toString8());
1342        return ret;
1343    }
1344
1345    *device = client;
1346    return ret;
1347}
1348
1349Status CameraService::setTorchMode(const String16& cameraId, bool enabled,
1350        const sp<IBinder>& clientBinder) {
1351
1352    ATRACE_CALL();
1353    if (enabled && clientBinder == nullptr) {
1354        ALOGE("%s: torch client binder is NULL", __FUNCTION__);
1355        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT,
1356                "Torch client Binder is null");
1357    }
1358
1359    String8 id = String8(cameraId.string());
1360    int uid = getCallingUid();
1361
1362    // verify id is valid.
1363    auto state = getCameraState(id);
1364    if (state == nullptr) {
1365        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1366        return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
1367                "Camera ID \"%s\" is a not valid camera ID", id.string());
1368    }
1369
1370    int32_t cameraStatus = state->getStatus();
1371    if (cameraStatus != ICameraServiceListener::STATUS_PRESENT &&
1372            cameraStatus != ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1373        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1374        return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
1375                "Camera ID \"%s\" is a not valid camera ID", id.string());
1376    }
1377
1378    {
1379        Mutex::Autolock al(mTorchStatusMutex);
1380        int32_t status;
1381        status_t err = getTorchStatusLocked(id, &status);
1382        if (err != OK) {
1383            if (err == NAME_NOT_FOUND) {
1384                return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
1385                        "Camera \"%s\" does not have a flash unit", id.string());
1386            }
1387            ALOGE("%s: getting current torch status failed for camera %s",
1388                    __FUNCTION__, id.string());
1389            return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
1390                    "Error updating torch status for camera \"%s\": %s (%d)", id.string(),
1391                    strerror(-err), err);
1392        }
1393
1394        if (status == ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE) {
1395            if (cameraStatus == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1396                ALOGE("%s: torch mode of camera %s is not available because "
1397                        "camera is in use", __FUNCTION__, id.string());
1398                return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE,
1399                        "Torch for camera \"%s\" is not available due to an existing camera user",
1400                        id.string());
1401            } else {
1402                ALOGE("%s: torch mode of camera %s is not available due to "
1403                        "insufficient resources", __FUNCTION__, id.string());
1404                return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE,
1405                        "Torch for camera \"%s\" is not available due to insufficient resources",
1406                        id.string());
1407            }
1408        }
1409    }
1410
1411    {
1412        // Update UID map - this is used in the torch status changed callbacks, so must be done
1413        // before setTorchMode
1414        Mutex::Autolock al(mTorchUidMapMutex);
1415        if (mTorchUidMap.find(id) == mTorchUidMap.end()) {
1416            mTorchUidMap[id].first = uid;
1417            mTorchUidMap[id].second = uid;
1418        } else {
1419            // Set the pending UID
1420            mTorchUidMap[id].first = uid;
1421        }
1422    }
1423
1424    status_t err = mFlashlight->setTorchMode(id, enabled);
1425
1426    if (err != OK) {
1427        int32_t errorCode;
1428        String8 msg;
1429        switch (err) {
1430            case -ENOSYS:
1431                msg = String8::format("Camera \"%s\" has no flashlight",
1432                    id.string());
1433                errorCode = ERROR_ILLEGAL_ARGUMENT;
1434                break;
1435            default:
1436                msg = String8::format(
1437                    "Setting torch mode of camera \"%s\" to %d failed: %s (%d)",
1438                    id.string(), enabled, strerror(-err), err);
1439                errorCode = ERROR_INVALID_OPERATION;
1440        }
1441        ALOGE("%s: %s", __FUNCTION__, msg.string());
1442        return STATUS_ERROR(errorCode, msg.string());
1443    }
1444
1445    {
1446        // update the link to client's death
1447        Mutex::Autolock al(mTorchClientMapMutex);
1448        ssize_t index = mTorchClientMap.indexOfKey(id);
1449        if (enabled) {
1450            if (index == NAME_NOT_FOUND) {
1451                mTorchClientMap.add(id, clientBinder);
1452            } else {
1453                mTorchClientMap.valueAt(index)->unlinkToDeath(this);
1454                mTorchClientMap.replaceValueAt(index, clientBinder);
1455            }
1456            clientBinder->linkToDeath(this);
1457        } else if (index != NAME_NOT_FOUND) {
1458            mTorchClientMap.valueAt(index)->unlinkToDeath(this);
1459        }
1460    }
1461
1462    return Status::ok();
1463}
1464
1465Status CameraService::notifySystemEvent(int32_t eventId,
1466        const std::vector<int32_t>& args) {
1467    ATRACE_CALL();
1468
1469    switch(eventId) {
1470        case ICameraService::EVENT_USER_SWITCHED: {
1471            doUserSwitch(/*newUserIds*/ args);
1472            break;
1473        }
1474        case ICameraService::EVENT_NONE:
1475        default: {
1476            ALOGW("%s: Received invalid system event from system_server: %d", __FUNCTION__,
1477                    eventId);
1478            break;
1479        }
1480    }
1481    return Status::ok();
1482}
1483
1484Status CameraService::addListener(const sp<ICameraServiceListener>& listener) {
1485    ATRACE_CALL();
1486
1487    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
1488
1489    if (listener == nullptr) {
1490        ALOGE("%s: Listener must not be null", __FUNCTION__);
1491        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Null listener given to addListener");
1492    }
1493
1494    Mutex::Autolock lock(mServiceLock);
1495
1496    {
1497        Mutex::Autolock lock(mStatusListenerLock);
1498        for (auto& it : mListenerList) {
1499            if (IInterface::asBinder(it) == IInterface::asBinder(listener)) {
1500                ALOGW("%s: Tried to add listener %p which was already subscribed",
1501                      __FUNCTION__, listener.get());
1502                return STATUS_ERROR(ERROR_ALREADY_EXISTS, "Listener already registered");
1503            }
1504        }
1505
1506        mListenerList.push_back(listener);
1507    }
1508
1509
1510    /* Immediately signal current status to this listener only */
1511    {
1512        Mutex::Autolock lock(mCameraStatesLock);
1513        for (auto& i : mCameraStates) {
1514            // TODO: Update binder to use String16 for camera IDs and remove;
1515            int id = cameraIdToInt(i.first);
1516            if (id == -1) continue;
1517
1518            listener->onStatusChanged(i.second->getStatus(), id);
1519        }
1520    }
1521
1522    /* Immediately signal current torch status to this listener only */
1523    {
1524        Mutex::Autolock al(mTorchStatusMutex);
1525        for (size_t i = 0; i < mTorchStatusMap.size(); i++ ) {
1526            String16 id = String16(mTorchStatusMap.keyAt(i).string());
1527            listener->onTorchStatusChanged(mTorchStatusMap.valueAt(i), id);
1528        }
1529    }
1530
1531    return Status::ok();
1532}
1533
1534Status CameraService::removeListener(const sp<ICameraServiceListener>& listener) {
1535    ATRACE_CALL();
1536
1537    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
1538
1539    if (listener == 0) {
1540        ALOGE("%s: Listener must not be null", __FUNCTION__);
1541        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Null listener given to removeListener");
1542    }
1543
1544    Mutex::Autolock lock(mServiceLock);
1545
1546    {
1547        Mutex::Autolock lock(mStatusListenerLock);
1548        for (auto it = mListenerList.begin(); it != mListenerList.end(); it++) {
1549            if (IInterface::asBinder(*it) == IInterface::asBinder(listener)) {
1550                mListenerList.erase(it);
1551                return Status::ok();
1552            }
1553        }
1554    }
1555
1556    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
1557          __FUNCTION__, listener.get());
1558
1559    return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Unregistered listener given to removeListener");
1560}
1561
1562Status CameraService::getLegacyParameters(int cameraId, /*out*/String16* parameters) {
1563
1564    ATRACE_CALL();
1565    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1566
1567    if (parameters == NULL) {
1568        ALOGE("%s: parameters must not be null", __FUNCTION__);
1569        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Parameters must not be null");
1570    }
1571
1572    Status ret = Status::ok();
1573
1574    CameraParameters shimParams;
1575    if (!(ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)).isOk()) {
1576        // Error logged by caller
1577        return ret;
1578    }
1579
1580    String8 shimParamsString8 = shimParams.flatten();
1581    String16 shimParamsString16 = String16(shimParamsString8);
1582
1583    *parameters = shimParamsString16;
1584
1585    return ret;
1586}
1587
1588Status CameraService::supportsCameraApi(int cameraId, int apiVersion, bool *isSupported) {
1589    ATRACE_CALL();
1590
1591    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1592
1593    switch (apiVersion) {
1594        case API_VERSION_1:
1595        case API_VERSION_2:
1596            break;
1597        default:
1598            String8 msg = String8::format("Unknown API version %d", apiVersion);
1599            ALOGE("%s: %s", __FUNCTION__, msg.string());
1600            return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string());
1601    }
1602
1603    int facing = -1;
1604    int deviceVersion = getDeviceVersion(cameraId, &facing);
1605
1606    switch(deviceVersion) {
1607        case CAMERA_DEVICE_API_VERSION_1_0:
1608        case CAMERA_DEVICE_API_VERSION_3_0:
1609        case CAMERA_DEVICE_API_VERSION_3_1:
1610            if (apiVersion == API_VERSION_2) {
1611                ALOGV("%s: Camera id %d uses HAL version %d <3.2, doesn't support api2 without shim",
1612                        __FUNCTION__, cameraId, deviceVersion);
1613                *isSupported = false;
1614            } else { // if (apiVersion == API_VERSION_1) {
1615                ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported",
1616                        __FUNCTION__, cameraId);
1617                *isSupported = true;
1618            }
1619            break;
1620        case CAMERA_DEVICE_API_VERSION_3_2:
1621        case CAMERA_DEVICE_API_VERSION_3_3:
1622        case CAMERA_DEVICE_API_VERSION_3_4:
1623            ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly",
1624                    __FUNCTION__, cameraId);
1625            *isSupported = true;
1626            break;
1627        case -1: {
1628            String8 msg = String8::format("Unknown camera ID %d", cameraId);
1629            ALOGE("%s: %s", __FUNCTION__, msg.string());
1630            return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string());
1631        }
1632        default: {
1633            String8 msg = String8::format("Unknown device version %d for device %d",
1634                    deviceVersion, cameraId);
1635            ALOGE("%s: %s", __FUNCTION__, msg.string());
1636            return STATUS_ERROR(ERROR_INVALID_OPERATION, msg.string());
1637        }
1638    }
1639
1640    return Status::ok();
1641}
1642
1643void CameraService::removeByClient(const BasicClient* client) {
1644    Mutex::Autolock lock(mServiceLock);
1645    for (auto& i : mActiveClientManager.getAll()) {
1646        auto clientSp = i->getValue();
1647        if (clientSp.get() == client) {
1648            mActiveClientManager.remove(i);
1649        }
1650    }
1651}
1652
1653bool CameraService::evictClientIdByRemote(const wp<IBinder>& remote) {
1654    const int callingPid = getCallingPid();
1655    const int servicePid = getpid();
1656    bool ret = false;
1657    {
1658        // Acquire mServiceLock and prevent other clients from connecting
1659        std::unique_ptr<AutoConditionLock> lock =
1660                AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1661
1662
1663        std::vector<sp<BasicClient>> evicted;
1664        for (auto& i : mActiveClientManager.getAll()) {
1665            auto clientSp = i->getValue();
1666            if (clientSp.get() == nullptr) {
1667                ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1668                mActiveClientManager.remove(i);
1669                continue;
1670            }
1671            if (remote == clientSp->getRemote() && (callingPid == servicePid ||
1672                    callingPid == clientSp->getClientPid())) {
1673                mActiveClientManager.remove(i);
1674                evicted.push_back(clientSp);
1675
1676                // Notify the client of disconnection
1677                clientSp->notifyError(
1678                        hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
1679                        CaptureResultExtras());
1680            }
1681        }
1682
1683        // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1684        // other clients from connecting in mServiceLockWrapper if held
1685        mServiceLock.unlock();
1686
1687        // Do not clear caller identity, remote caller should be client proccess
1688
1689        for (auto& i : evicted) {
1690            if (i.get() != nullptr) {
1691                i->disconnect();
1692                ret = true;
1693            }
1694        }
1695
1696        // Reacquire mServiceLock
1697        mServiceLock.lock();
1698
1699    } // lock is destroyed, allow further connect calls
1700
1701    return ret;
1702}
1703
1704
1705/**
1706 * Check camera capabilities, such as support for basic color operation
1707 * Also check that the device HAL version is still in support
1708 */
1709int CameraService::checkCameraCapabilities(int id, camera_info info, int *latestStrangeCameraId) {
1710    // device_version undefined in CAMERA_MODULE_API_VERSION_1_0,
1711    // All CAMERA_MODULE_API_VERSION_1_0 devices are backward-compatible
1712    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) {
1713        // Verify the device version is in the supported range
1714        switch (info.device_version) {
1715            case CAMERA_DEVICE_API_VERSION_1_0:
1716            case CAMERA_DEVICE_API_VERSION_3_0:
1717            case CAMERA_DEVICE_API_VERSION_3_1:
1718            case CAMERA_DEVICE_API_VERSION_3_2:
1719            case CAMERA_DEVICE_API_VERSION_3_3:
1720            case CAMERA_DEVICE_API_VERSION_3_4:
1721                // in support
1722                break;
1723            case CAMERA_DEVICE_API_VERSION_2_0:
1724            case CAMERA_DEVICE_API_VERSION_2_1:
1725                // no longer supported
1726            default:
1727                ALOGE("%s: Device %d has HAL version %x, which is not supported",
1728                        __FUNCTION__, id, info.device_version);
1729                String8 msg = String8::format(
1730                        "Unsupported device HAL version %x for device %d",
1731                        info.device_version, id);
1732                logServiceError(msg.string(), NO_INIT);
1733                return NO_INIT;
1734        }
1735    }
1736
1737    // Assume all devices pre-v3.3 are backward-compatible
1738    bool isBackwardCompatible = true;
1739    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0
1740            && info.device_version >= CAMERA_DEVICE_API_VERSION_3_3) {
1741        isBackwardCompatible = false;
1742        status_t res;
1743        camera_metadata_ro_entry_t caps;
1744        res = find_camera_metadata_ro_entry(
1745            info.static_camera_characteristics,
1746            ANDROID_REQUEST_AVAILABLE_CAPABILITIES,
1747            &caps);
1748        if (res != 0) {
1749            ALOGW("%s: Unable to find camera capabilities for camera device %d",
1750                    __FUNCTION__, id);
1751            caps.count = 0;
1752        }
1753        for (size_t i = 0; i < caps.count; i++) {
1754            if (caps.data.u8[i] ==
1755                    ANDROID_REQUEST_AVAILABLE_CAPABILITIES_BACKWARD_COMPATIBLE) {
1756                isBackwardCompatible = true;
1757                break;
1758            }
1759        }
1760    }
1761
1762    if (!isBackwardCompatible) {
1763        mNumberOfNormalCameras--;
1764        *latestStrangeCameraId = id;
1765    } else {
1766        if (id > *latestStrangeCameraId) {
1767            ALOGE("%s: Normal camera ID %d higher than strange camera ID %d. "
1768                    "This is not allowed due backward-compatibility requirements",
1769                    __FUNCTION__, id, *latestStrangeCameraId);
1770            logServiceError("Invalid order of camera devices", NO_INIT);
1771            mNumberOfCameras = 0;
1772            mNumberOfNormalCameras = 0;
1773            return NO_INIT;
1774        }
1775    }
1776    return OK;
1777}
1778
1779std::shared_ptr<CameraService::CameraState> CameraService::getCameraState(
1780        const String8& cameraId) const {
1781    std::shared_ptr<CameraState> state;
1782    {
1783        Mutex::Autolock lock(mCameraStatesLock);
1784        auto iter = mCameraStates.find(cameraId);
1785        if (iter != mCameraStates.end()) {
1786            state = iter->second;
1787        }
1788    }
1789    return state;
1790}
1791
1792sp<CameraService::BasicClient> CameraService::removeClientLocked(const String8& cameraId) {
1793    // Remove from active clients list
1794    auto clientDescriptorPtr = mActiveClientManager.remove(cameraId);
1795    if (clientDescriptorPtr == nullptr) {
1796        ALOGW("%s: Could not evict client, no client for camera ID %s", __FUNCTION__,
1797                cameraId.string());
1798        return sp<BasicClient>{nullptr};
1799    }
1800
1801    return clientDescriptorPtr->getValue();
1802}
1803
1804void CameraService::doUserSwitch(const std::vector<int32_t>& newUserIds) {
1805    // Acquire mServiceLock and prevent other clients from connecting
1806    std::unique_ptr<AutoConditionLock> lock =
1807            AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1808
1809    std::set<userid_t> newAllowedUsers;
1810    for (size_t i = 0; i < newUserIds.size(); i++) {
1811        if (newUserIds[i] < 0) {
1812            ALOGE("%s: Bad user ID %d given during user switch, ignoring.",
1813                    __FUNCTION__, newUserIds[i]);
1814            return;
1815        }
1816        newAllowedUsers.insert(static_cast<userid_t>(newUserIds[i]));
1817    }
1818
1819
1820    if (newAllowedUsers == mAllowedUsers) {
1821        ALOGW("%s: Received notification of user switch with no updated user IDs.", __FUNCTION__);
1822        return;
1823    }
1824
1825    logUserSwitch(mAllowedUsers, newAllowedUsers);
1826
1827    mAllowedUsers = std::move(newAllowedUsers);
1828
1829    // Current user has switched, evict all current clients.
1830    std::vector<sp<BasicClient>> evicted;
1831    for (auto& i : mActiveClientManager.getAll()) {
1832        auto clientSp = i->getValue();
1833
1834        if (clientSp.get() == nullptr) {
1835            ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1836            continue;
1837        }
1838
1839        // Don't evict clients that are still allowed.
1840        uid_t clientUid = clientSp->getClientUid();
1841        userid_t clientUserId = multiuser_get_user_id(clientUid);
1842        if (mAllowedUsers.find(clientUserId) != mAllowedUsers.end()) {
1843            continue;
1844        }
1845
1846        evicted.push_back(clientSp);
1847
1848        String8 curTime = getFormattedCurrentTime();
1849
1850        ALOGE("Evicting conflicting client for camera ID %s due to user change",
1851                i->getKey().string());
1852
1853        // Log the clients evicted
1854        logEvent(String8::format("EVICT device %s client held by package %s (PID %"
1855                PRId32 ", priority %" PRId32 ")\n   - Evicted due to user switch.",
1856                i->getKey().string(), String8{clientSp->getPackageName()}.string(),
1857                i->getOwnerId(), i->getPriority()));
1858
1859    }
1860
1861    // Do not hold mServiceLock while disconnecting clients, but retain the condition
1862    // blocking other clients from connecting in mServiceLockWrapper if held.
1863    mServiceLock.unlock();
1864
1865    // Clear caller identity temporarily so client disconnect PID checks work correctly
1866    int64_t token = IPCThreadState::self()->clearCallingIdentity();
1867
1868    for (auto& i : evicted) {
1869        i->disconnect();
1870    }
1871
1872    IPCThreadState::self()->restoreCallingIdentity(token);
1873
1874    // Reacquire mServiceLock
1875    mServiceLock.lock();
1876}
1877
1878void CameraService::logEvent(const char* event) {
1879    String8 curTime = getFormattedCurrentTime();
1880    Mutex::Autolock l(mLogLock);
1881    mEventLog.add(String8::format("%s : %s", curTime.string(), event));
1882}
1883
1884void CameraService::logDisconnected(const char* cameraId, int clientPid,
1885        const char* clientPackage) {
1886    // Log the clients evicted
1887    logEvent(String8::format("DISCONNECT device %s client for package %s (PID %d)", cameraId,
1888            clientPackage, clientPid));
1889}
1890
1891void CameraService::logConnected(const char* cameraId, int clientPid,
1892        const char* clientPackage) {
1893    // Log the clients evicted
1894    logEvent(String8::format("CONNECT device %s client for package %s (PID %d)", cameraId,
1895            clientPackage, clientPid));
1896}
1897
1898void CameraService::logRejected(const char* cameraId, int clientPid,
1899        const char* clientPackage, const char* reason) {
1900    // Log the client rejected
1901    logEvent(String8::format("REJECT device %s client for package %s (PID %d), reason: (%s)",
1902            cameraId, clientPackage, clientPid, reason));
1903}
1904
1905void CameraService::logUserSwitch(const std::set<userid_t>& oldUserIds,
1906        const std::set<userid_t>& newUserIds) {
1907    String8 newUsers = toString(newUserIds);
1908    String8 oldUsers = toString(oldUserIds);
1909    // Log the new and old users
1910    logEvent(String8::format("USER_SWITCH previous allowed users: %s , current allowed users: %s",
1911            oldUsers.string(), newUsers.string()));
1912}
1913
1914void CameraService::logDeviceRemoved(const char* cameraId, const char* reason) {
1915    // Log the device removal
1916    logEvent(String8::format("REMOVE device %s, reason: (%s)", cameraId, reason));
1917}
1918
1919void CameraService::logDeviceAdded(const char* cameraId, const char* reason) {
1920    // Log the device removal
1921    logEvent(String8::format("ADD device %s, reason: (%s)", cameraId, reason));
1922}
1923
1924void CameraService::logClientDied(int clientPid, const char* reason) {
1925    // Log the device removal
1926    logEvent(String8::format("DIED client(s) with PID %d, reason: (%s)", clientPid, reason));
1927}
1928
1929void CameraService::logServiceError(const char* msg, int errorCode) {
1930    String8 curTime = getFormattedCurrentTime();
1931    logEvent(String8::format("SERVICE ERROR: %s : %d (%s)", msg, errorCode, strerror(-errorCode)));
1932}
1933
1934status_t CameraService::onTransact(uint32_t code, const Parcel& data, Parcel* reply,
1935        uint32_t flags) {
1936
1937    const int pid = getCallingPid();
1938    const int selfPid = getpid();
1939
1940    // Permission checks
1941    switch (code) {
1942        case BnCameraService::NOTIFYSYSTEMEVENT: {
1943            if (pid != selfPid) {
1944                // Ensure we're being called by system_server, or similar process with
1945                // permissions to notify the camera service about system events
1946                if (!checkCallingPermission(
1947                        String16("android.permission.CAMERA_SEND_SYSTEM_EVENTS"))) {
1948                    const int uid = getCallingUid();
1949                    ALOGE("Permission Denial: cannot send updates to camera service about system"
1950                            " events from pid=%d, uid=%d", pid, uid);
1951                    return PERMISSION_DENIED;
1952                }
1953            }
1954            break;
1955        }
1956    }
1957
1958    return BnCameraService::onTransact(code, data, reply, flags);
1959}
1960
1961// We share the media players for shutter and recording sound for all clients.
1962// A reference count is kept to determine when we will actually release the
1963// media players.
1964
1965MediaPlayer* CameraService::newMediaPlayer(const char *file) {
1966    MediaPlayer* mp = new MediaPlayer();
1967    if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) {
1968        mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
1969        mp->prepare();
1970    } else {
1971        ALOGE("Failed to load CameraService sounds: %s", file);
1972        return NULL;
1973    }
1974    return mp;
1975}
1976
1977void CameraService::loadSound() {
1978    ATRACE_CALL();
1979
1980    Mutex::Autolock lock(mSoundLock);
1981    LOG1("CameraService::loadSound ref=%d", mSoundRef);
1982    if (mSoundRef++) return;
1983
1984    mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
1985    mSoundPlayer[SOUND_RECORDING_START] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
1986    mSoundPlayer[SOUND_RECORDING_STOP] = newMediaPlayer("/system/media/audio/ui/VideoStop.ogg");
1987}
1988
1989void CameraService::releaseSound() {
1990    Mutex::Autolock lock(mSoundLock);
1991    LOG1("CameraService::releaseSound ref=%d", mSoundRef);
1992    if (--mSoundRef) return;
1993
1994    for (int i = 0; i < NUM_SOUNDS; i++) {
1995        if (mSoundPlayer[i] != 0) {
1996            mSoundPlayer[i]->disconnect();
1997            mSoundPlayer[i].clear();
1998        }
1999    }
2000}
2001
2002void CameraService::playSound(sound_kind kind) {
2003    ATRACE_CALL();
2004
2005    LOG1("playSound(%d)", kind);
2006    Mutex::Autolock lock(mSoundLock);
2007    sp<MediaPlayer> player = mSoundPlayer[kind];
2008    if (player != 0) {
2009        player->seekTo(0);
2010        player->start();
2011    }
2012}
2013
2014// ----------------------------------------------------------------------------
2015
2016CameraService::Client::Client(const sp<CameraService>& cameraService,
2017        const sp<ICameraClient>& cameraClient,
2018        const String16& clientPackageName,
2019        int cameraId, int cameraFacing,
2020        int clientPid, uid_t clientUid,
2021        int servicePid) :
2022        CameraService::BasicClient(cameraService,
2023                IInterface::asBinder(cameraClient),
2024                clientPackageName,
2025                cameraId, cameraFacing,
2026                clientPid, clientUid,
2027                servicePid)
2028{
2029    int callingPid = getCallingPid();
2030    LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
2031
2032    mRemoteCallback = cameraClient;
2033
2034    cameraService->loadSound();
2035
2036    LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
2037}
2038
2039// tear down the client
2040CameraService::Client::~Client() {
2041    ALOGV("~Client");
2042    mDestructionStarted = true;
2043
2044    mCameraService->releaseSound();
2045    // unconditionally disconnect. function is idempotent
2046    Client::disconnect();
2047}
2048
2049CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
2050        const sp<IBinder>& remoteCallback,
2051        const String16& clientPackageName,
2052        int cameraId, int cameraFacing,
2053        int clientPid, uid_t clientUid,
2054        int servicePid):
2055        mClientPackageName(clientPackageName), mDisconnected(false)
2056{
2057    mCameraService = cameraService;
2058    mRemoteBinder = remoteCallback;
2059    mCameraId = cameraId;
2060    mCameraFacing = cameraFacing;
2061    mClientPid = clientPid;
2062    mClientUid = clientUid;
2063    mServicePid = servicePid;
2064    mOpsActive = false;
2065    mDestructionStarted = false;
2066
2067    // In some cases the calling code has no access to the package it runs under.
2068    // For example, NDK camera API.
2069    // In this case we will get the packages for the calling UID and pick the first one
2070    // for attributing the app op. This will work correctly for runtime permissions
2071    // as for legacy apps we will toggle the app op for all packages in the UID.
2072    // The caveat is that the operation may be attributed to the wrong package and
2073    // stats based on app ops may be slightly off.
2074    if (mClientPackageName.size() <= 0) {
2075        sp<IServiceManager> sm = defaultServiceManager();
2076        sp<IBinder> binder = sm->getService(String16(kPermissionServiceName));
2077        if (binder == 0) {
2078            ALOGE("Cannot get permission service");
2079            // Leave mClientPackageName unchanged (empty) and the further interaction
2080            // with camera will fail in BasicClient::startCameraOps
2081            return;
2082        }
2083
2084        sp<IPermissionController> permCtrl = interface_cast<IPermissionController>(binder);
2085        Vector<String16> packages;
2086
2087        permCtrl->getPackagesForUid(mClientUid, packages);
2088
2089        if (packages.isEmpty()) {
2090            ALOGE("No packages for calling UID");
2091            // Leave mClientPackageName unchanged (empty) and the further interaction
2092            // with camera will fail in BasicClient::startCameraOps
2093            return;
2094        }
2095        mClientPackageName = packages[0];
2096    }
2097}
2098
2099CameraService::BasicClient::~BasicClient() {
2100    ALOGV("~BasicClient");
2101    mDestructionStarted = true;
2102}
2103
2104binder::Status CameraService::BasicClient::disconnect() {
2105    binder::Status res = Status::ok();
2106    if (mDisconnected) {
2107        return res;
2108    }
2109    mDisconnected = true;
2110
2111    mCameraService->removeByClient(this);
2112    mCameraService->logDisconnected(String8::format("%d", mCameraId), mClientPid,
2113            String8(mClientPackageName));
2114
2115    sp<IBinder> remote = getRemote();
2116    if (remote != nullptr) {
2117        remote->unlinkToDeath(mCameraService);
2118    }
2119
2120    finishCameraOps();
2121    ALOGI("%s: Disconnected client for camera %d for PID %d", __FUNCTION__, mCameraId, mClientPid);
2122
2123    // client shouldn't be able to call into us anymore
2124    mClientPid = 0;
2125
2126    return res;
2127}
2128
2129status_t CameraService::BasicClient::dump(int, const Vector<String16>&) {
2130    // No dumping of clients directly over Binder,
2131    // must go through CameraService::dump
2132    android_errorWriteWithInfoLog(SN_EVENT_LOG_ID, "26265403",
2133            IPCThreadState::self()->getCallingUid(), NULL, 0);
2134    return OK;
2135}
2136
2137String16 CameraService::BasicClient::getPackageName() const {
2138    return mClientPackageName;
2139}
2140
2141
2142int CameraService::BasicClient::getClientPid() const {
2143    return mClientPid;
2144}
2145
2146uid_t CameraService::BasicClient::getClientUid() const {
2147    return mClientUid;
2148}
2149
2150bool CameraService::BasicClient::canCastToApiClient(apiLevel level) const {
2151    // Defaults to API2.
2152    return level == API_2;
2153}
2154
2155status_t CameraService::BasicClient::startCameraOps() {
2156    ATRACE_CALL();
2157
2158    int32_t res;
2159    // Notify app ops that the camera is not available
2160    mOpsCallback = new OpsCallback(this);
2161
2162    {
2163        ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
2164              __FUNCTION__, String8(mClientPackageName).string(), mClientUid);
2165    }
2166
2167    mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
2168            mClientPackageName, mOpsCallback);
2169    res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
2170            mClientUid, mClientPackageName);
2171
2172    if (res == AppOpsManager::MODE_ERRORED) {
2173        ALOGI("Camera %d: Access for \"%s\" has been revoked",
2174                mCameraId, String8(mClientPackageName).string());
2175        return PERMISSION_DENIED;
2176    }
2177
2178    if (res == AppOpsManager::MODE_IGNORED) {
2179        ALOGI("Camera %d: Access for \"%s\" has been restricted",
2180                mCameraId, String8(mClientPackageName).string());
2181        // Return the same error as for device policy manager rejection
2182        return -EACCES;
2183    }
2184
2185    mOpsActive = true;
2186
2187    // Transition device availability listeners from PRESENT -> NOT_AVAILABLE
2188    mCameraService->updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
2189            String8::format("%d", mCameraId));
2190
2191    // Transition device state to OPEN
2192    mCameraService->updateProxyDeviceState(ICameraServiceProxy::CAMERA_STATE_OPEN,
2193            String8::format("%d", mCameraId));
2194
2195    return OK;
2196}
2197
2198status_t CameraService::BasicClient::finishCameraOps() {
2199    ATRACE_CALL();
2200
2201    // Check if startCameraOps succeeded, and if so, finish the camera op
2202    if (mOpsActive) {
2203        // Notify app ops that the camera is available again
2204        mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
2205                mClientPackageName);
2206        mOpsActive = false;
2207
2208        std::initializer_list<int32_t> rejected = {ICameraServiceListener::STATUS_NOT_PRESENT,
2209                ICameraServiceListener::STATUS_ENUMERATING};
2210
2211        // Transition to PRESENT if the camera is not in either of the rejected states
2212        mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
2213                String8::format("%d", mCameraId), rejected);
2214
2215        // Transition device state to CLOSED
2216        mCameraService->updateProxyDeviceState(ICameraServiceProxy::CAMERA_STATE_CLOSED,
2217                String8::format("%d", mCameraId));
2218
2219        // Notify flashlight that a camera device is closed.
2220        mCameraService->mFlashlight->deviceClosed(
2221                String8::format("%d", mCameraId));
2222    }
2223    // Always stop watching, even if no camera op is active
2224    if (mOpsCallback != NULL) {
2225        mAppOpsManager.stopWatchingMode(mOpsCallback);
2226    }
2227    mOpsCallback.clear();
2228
2229    return OK;
2230}
2231
2232void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
2233    ATRACE_CALL();
2234
2235    String8 name(packageName);
2236    String8 myName(mClientPackageName);
2237
2238    if (op != AppOpsManager::OP_CAMERA) {
2239        ALOGW("Unexpected app ops notification received: %d", op);
2240        return;
2241    }
2242
2243    int32_t res;
2244    res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
2245            mClientUid, mClientPackageName);
2246    ALOGV("checkOp returns: %d, %s ", res,
2247            res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
2248            res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
2249            res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
2250            "UNKNOWN");
2251
2252    if (res != AppOpsManager::MODE_ALLOWED) {
2253        ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
2254                myName.string());
2255        // Reset the client PID to allow server-initiated disconnect,
2256        // and to prevent further calls by client.
2257        mClientPid = getCallingPid();
2258        CaptureResultExtras resultExtras; // a dummy result (invalid)
2259        notifyError(hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras);
2260        disconnect();
2261    }
2262}
2263
2264// ----------------------------------------------------------------------------
2265
2266// Provide client strong pointer for callbacks.
2267sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) {
2268    String8 cameraId = String8::format("%d", (int)(intptr_t) user);
2269    auto clientDescriptor = gCameraService->mActiveClientManager.get(cameraId);
2270    if (clientDescriptor != nullptr) {
2271        return sp<Client>{
2272                static_cast<Client*>(clientDescriptor->getValue().get())};
2273    }
2274    return sp<Client>{nullptr};
2275}
2276
2277void CameraService::Client::notifyError(int32_t errorCode,
2278        const CaptureResultExtras& resultExtras) {
2279    (void) errorCode;
2280    (void) resultExtras;
2281    if (mRemoteCallback != NULL) {
2282        mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
2283    } else {
2284        ALOGE("mRemoteCallback is NULL!!");
2285    }
2286}
2287
2288// NOTE: function is idempotent
2289binder::Status CameraService::Client::disconnect() {
2290    ALOGV("Client::disconnect");
2291    return BasicClient::disconnect();
2292}
2293
2294bool CameraService::Client::canCastToApiClient(apiLevel level) const {
2295    return level == API_1;
2296}
2297
2298CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
2299        mClient(client) {
2300}
2301
2302void CameraService::Client::OpsCallback::opChanged(int32_t op,
2303        const String16& packageName) {
2304    sp<BasicClient> client = mClient.promote();
2305    if (client != NULL) {
2306        client->opChanged(op, packageName);
2307    }
2308}
2309
2310// ----------------------------------------------------------------------------
2311//                  CameraState
2312// ----------------------------------------------------------------------------
2313
2314CameraService::CameraState::CameraState(const String8& id, int cost,
2315        const std::set<String8>& conflicting) : mId(id),
2316        mStatus(ICameraServiceListener::STATUS_PRESENT), mCost(cost), mConflicting(conflicting) {}
2317
2318CameraService::CameraState::~CameraState() {}
2319
2320int32_t CameraService::CameraState::getStatus() const {
2321    Mutex::Autolock lock(mStatusLock);
2322    return mStatus;
2323}
2324
2325CameraParameters CameraService::CameraState::getShimParams() const {
2326    return mShimParams;
2327}
2328
2329void CameraService::CameraState::setShimParams(const CameraParameters& params) {
2330    mShimParams = params;
2331}
2332
2333int CameraService::CameraState::getCost() const {
2334    return mCost;
2335}
2336
2337std::set<String8> CameraService::CameraState::getConflicting() const {
2338    return mConflicting;
2339}
2340
2341String8 CameraService::CameraState::getId() const {
2342    return mId;
2343}
2344
2345// ----------------------------------------------------------------------------
2346//                  ClientEventListener
2347// ----------------------------------------------------------------------------
2348
2349void CameraService::ClientEventListener::onClientAdded(
2350        const resource_policy::ClientDescriptor<String8,
2351        sp<CameraService::BasicClient>>& descriptor) {
2352    auto basicClient = descriptor.getValue();
2353    if (basicClient.get() != nullptr) {
2354        BatteryNotifier& notifier(BatteryNotifier::getInstance());
2355        notifier.noteStartCamera(descriptor.getKey(),
2356                static_cast<int>(basicClient->getClientUid()));
2357    }
2358}
2359
2360void CameraService::ClientEventListener::onClientRemoved(
2361        const resource_policy::ClientDescriptor<String8,
2362        sp<CameraService::BasicClient>>& descriptor) {
2363    auto basicClient = descriptor.getValue();
2364    if (basicClient.get() != nullptr) {
2365        BatteryNotifier& notifier(BatteryNotifier::getInstance());
2366        notifier.noteStopCamera(descriptor.getKey(),
2367                static_cast<int>(basicClient->getClientUid()));
2368    }
2369}
2370
2371
2372// ----------------------------------------------------------------------------
2373//                  CameraClientManager
2374// ----------------------------------------------------------------------------
2375
2376CameraService::CameraClientManager::CameraClientManager() {
2377    setListener(std::make_shared<ClientEventListener>());
2378}
2379
2380CameraService::CameraClientManager::~CameraClientManager() {}
2381
2382sp<CameraService::BasicClient> CameraService::CameraClientManager::getCameraClient(
2383        const String8& id) const {
2384    auto descriptor = get(id);
2385    if (descriptor == nullptr) {
2386        return sp<BasicClient>{nullptr};
2387    }
2388    return descriptor->getValue();
2389}
2390
2391String8 CameraService::CameraClientManager::toString() const {
2392    auto all = getAll();
2393    String8 ret("[");
2394    bool hasAny = false;
2395    for (auto& i : all) {
2396        hasAny = true;
2397        String8 key = i->getKey();
2398        int32_t cost = i->getCost();
2399        int32_t pid = i->getOwnerId();
2400        int32_t priority = i->getPriority();
2401        auto conflicting = i->getConflicting();
2402        auto clientSp = i->getValue();
2403        String8 packageName;
2404        userid_t clientUserId = 0;
2405        if (clientSp.get() != nullptr) {
2406            packageName = String8{clientSp->getPackageName()};
2407            uid_t clientUid = clientSp->getClientUid();
2408            clientUserId = multiuser_get_user_id(clientUid);
2409        }
2410        ret.appendFormat("\n(Camera ID: %s, Cost: %" PRId32 ", PID: %" PRId32 ", Priority: %"
2411                PRId32 ", ", key.string(), cost, pid, priority);
2412
2413        if (clientSp.get() != nullptr) {
2414            ret.appendFormat("User Id: %d, ", clientUserId);
2415        }
2416        if (packageName.size() != 0) {
2417            ret.appendFormat("Client Package Name: %s", packageName.string());
2418        }
2419
2420        ret.append(", Conflicting Client Devices: {");
2421        for (auto& j : conflicting) {
2422            ret.appendFormat("%s, ", j.string());
2423        }
2424        ret.append("})");
2425    }
2426    if (hasAny) ret.append("\n");
2427    ret.append("]\n");
2428    return ret;
2429}
2430
2431CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor(
2432        const String8& key, const sp<BasicClient>& value, int32_t cost,
2433        const std::set<String8>& conflictingKeys, int32_t priority, int32_t ownerId) {
2434
2435    return std::make_shared<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>(
2436            key, value, cost, conflictingKeys, priority, ownerId);
2437}
2438
2439CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor(
2440        const sp<BasicClient>& value, const CameraService::DescriptorPtr& partial) {
2441    return makeClientDescriptor(partial->getKey(), value, partial->getCost(),
2442            partial->getConflicting(), partial->getPriority(), partial->getOwnerId());
2443}
2444
2445// ----------------------------------------------------------------------------
2446
2447static const int kDumpLockRetries = 50;
2448static const int kDumpLockSleep = 60000;
2449
2450static bool tryLock(Mutex& mutex)
2451{
2452    bool locked = false;
2453    for (int i = 0; i < kDumpLockRetries; ++i) {
2454        if (mutex.tryLock() == NO_ERROR) {
2455            locked = true;
2456            break;
2457        }
2458        usleep(kDumpLockSleep);
2459    }
2460    return locked;
2461}
2462
2463status_t CameraService::dump(int fd, const Vector<String16>& args) {
2464    ATRACE_CALL();
2465
2466    String8 result("Dump of the Camera Service:\n");
2467    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
2468        result = result.format("Permission Denial: "
2469                "can't dump CameraService from pid=%d, uid=%d\n",
2470                getCallingPid(),
2471                getCallingUid());
2472        write(fd, result.string(), result.size());
2473    } else {
2474        bool locked = tryLock(mServiceLock);
2475        // failed to lock - CameraService is probably deadlocked
2476        if (!locked) {
2477            result.append("CameraService may be deadlocked\n");
2478            write(fd, result.string(), result.size());
2479        }
2480
2481        bool hasClient = false;
2482        if (!mModule) {
2483            result = String8::format("No camera module available!\n");
2484            write(fd, result.string(), result.size());
2485
2486            // Dump event log for error information
2487            dumpEventLog(fd);
2488
2489            if (locked) mServiceLock.unlock();
2490            return NO_ERROR;
2491        }
2492
2493        result = String8::format("Camera module HAL API version: 0x%x\n", mModule->getHalApiVersion());
2494        result.appendFormat("Camera module API version: 0x%x\n", mModule->getModuleApiVersion());
2495        result.appendFormat("Camera module name: %s\n", mModule->getModuleName());
2496        result.appendFormat("Camera module author: %s\n", mModule->getModuleAuthor());
2497        result.appendFormat("Number of camera devices: %d\n", mNumberOfCameras);
2498        result.appendFormat("Number of normal camera devices: %d\n", mNumberOfNormalCameras);
2499        String8 activeClientString = mActiveClientManager.toString();
2500        result.appendFormat("Active Camera Clients:\n%s", activeClientString.string());
2501        result.appendFormat("Allowed users:\n%s\n", toString(mAllowedUsers).string());
2502
2503        sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
2504        if (desc == NULL) {
2505            result.appendFormat("Vendor tags left unimplemented.\n");
2506        } else {
2507            result.appendFormat("Vendor tag definitions:\n");
2508        }
2509
2510        write(fd, result.string(), result.size());
2511
2512        if (desc != NULL) {
2513            desc->dump(fd, /*verbosity*/2, /*indentation*/4);
2514        }
2515
2516        dumpEventLog(fd);
2517
2518        bool stateLocked = tryLock(mCameraStatesLock);
2519        if (!stateLocked) {
2520            result = String8::format("CameraStates in use, may be deadlocked\n");
2521            write(fd, result.string(), result.size());
2522        }
2523
2524        for (auto& state : mCameraStates) {
2525            String8 cameraId = state.first;
2526            result = String8::format("Camera %s information:\n", cameraId.string());
2527            camera_info info;
2528
2529            // TODO: Change getCameraInfo + HAL to use String cameraIds
2530            status_t rc = mModule->getCameraInfo(cameraIdToInt(cameraId), &info);
2531            if (rc != OK) {
2532                result.appendFormat("  Error reading static information!\n");
2533                write(fd, result.string(), result.size());
2534            } else {
2535                result.appendFormat("  Facing: %s\n",
2536                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
2537                result.appendFormat("  Orientation: %d\n", info.orientation);
2538                int deviceVersion;
2539                if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0) {
2540                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
2541                } else {
2542                    deviceVersion = info.device_version;
2543                }
2544
2545                auto conflicting = state.second->getConflicting();
2546                result.appendFormat("  Resource Cost: %d\n", state.second->getCost());
2547                result.appendFormat("  Conflicting Devices:");
2548                for (auto& id : conflicting) {
2549                    result.appendFormat(" %s", id.string());
2550                }
2551                if (conflicting.size() == 0) {
2552                    result.appendFormat(" NONE");
2553                }
2554                result.appendFormat("\n");
2555
2556                result.appendFormat("  Device version: %#x\n", deviceVersion);
2557                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_3_0) {
2558                    result.appendFormat("  Device static metadata:\n");
2559                    write(fd, result.string(), result.size());
2560                    dump_indented_camera_metadata(info.static_camera_characteristics,
2561                            fd, /*verbosity*/2, /*indentation*/4);
2562                } else {
2563                    write(fd, result.string(), result.size());
2564                }
2565
2566                CameraParameters p = state.second->getShimParams();
2567                if (!p.isEmpty()) {
2568                    result = String8::format("  Camera1 API shim is using parameters:\n        ");
2569                    write(fd, result.string(), result.size());
2570                    p.dump(fd, args);
2571                }
2572            }
2573
2574            auto clientDescriptor = mActiveClientManager.get(cameraId);
2575            if (clientDescriptor == nullptr) {
2576                result = String8::format("  Device %s is closed, no client instance\n",
2577                        cameraId.string());
2578                write(fd, result.string(), result.size());
2579                continue;
2580            }
2581            hasClient = true;
2582            result = String8::format("  Device %s is open. Client instance dump:\n\n",
2583                    cameraId.string());
2584            result.appendFormat("Client priority level: %d\n", clientDescriptor->getPriority());
2585            result.appendFormat("Client PID: %d\n", clientDescriptor->getOwnerId());
2586
2587            auto client = clientDescriptor->getValue();
2588            result.appendFormat("Client package: %s\n",
2589                    String8(client->getPackageName()).string());
2590            write(fd, result.string(), result.size());
2591
2592            client->dumpClient(fd, args);
2593        }
2594
2595        if (stateLocked) mCameraStatesLock.unlock();
2596
2597        if (!hasClient) {
2598            result = String8::format("\nNo active camera clients yet.\n");
2599            write(fd, result.string(), result.size());
2600        }
2601
2602        if (locked) mServiceLock.unlock();
2603
2604        // Dump camera traces if there were any
2605        write(fd, "\n", 1);
2606        camera3::CameraTraces::dump(fd, args);
2607
2608        // Process dump arguments, if any
2609        int n = args.size();
2610        String16 verboseOption("-v");
2611        String16 unreachableOption("--unreachable");
2612        for (int i = 0; i < n; i++) {
2613            if (args[i] == verboseOption) {
2614                // change logging level
2615                if (i + 1 >= n) continue;
2616                String8 levelStr(args[i+1]);
2617                int level = atoi(levelStr.string());
2618                result = String8::format("\nSetting log level to %d.\n", level);
2619                setLogLevel(level);
2620                write(fd, result.string(), result.size());
2621            } else if (args[i] == unreachableOption) {
2622                // Dump memory analysis
2623                // TODO - should limit be an argument parameter?
2624                UnreachableMemoryInfo info;
2625                bool success = GetUnreachableMemory(info, /*limit*/ 10000);
2626                if (!success) {
2627                    dprintf(fd, "\nUnable to dump unreachable memory. "
2628                            "Try disabling SELinux enforcement.\n");
2629                } else {
2630                    dprintf(fd, "\nDumping unreachable memory:\n");
2631                    std::string s = info.ToString(/*log_contents*/ true);
2632                    write(fd, s.c_str(), s.size());
2633                }
2634            }
2635        }
2636    }
2637    return NO_ERROR;
2638}
2639
2640void CameraService::dumpEventLog(int fd) {
2641    String8 result = String8("\nPrior client events (most recent at top):\n");
2642
2643    Mutex::Autolock l(mLogLock);
2644    for (const auto& msg : mEventLog) {
2645        result.appendFormat("  %s\n", msg.string());
2646    }
2647
2648    if (mEventLog.size() == DEFAULT_EVENT_LOG_LENGTH) {
2649        result.append("  ...\n");
2650    } else if (mEventLog.size() == 0) {
2651        result.append("  [no events yet]\n");
2652    }
2653    result.append("\n");
2654
2655    write(fd, result.string(), result.size());
2656}
2657
2658void CameraService::handleTorchClientBinderDied(const wp<IBinder> &who) {
2659    Mutex::Autolock al(mTorchClientMapMutex);
2660    for (size_t i = 0; i < mTorchClientMap.size(); i++) {
2661        if (mTorchClientMap[i] == who) {
2662            // turn off the torch mode that was turned on by dead client
2663            String8 cameraId = mTorchClientMap.keyAt(i);
2664            status_t res = mFlashlight->setTorchMode(cameraId, false);
2665            if (res) {
2666                ALOGE("%s: torch client died but couldn't turn off torch: "
2667                    "%s (%d)", __FUNCTION__, strerror(-res), res);
2668                return;
2669            }
2670            mTorchClientMap.removeItemsAt(i);
2671            break;
2672        }
2673    }
2674}
2675
2676/*virtual*/void CameraService::binderDied(const wp<IBinder> &who) {
2677
2678    /**
2679      * While tempting to promote the wp<IBinder> into a sp, it's actually not supported by the
2680      * binder driver
2681      */
2682
2683    logClientDied(getCallingPid(), String8("Binder died unexpectedly"));
2684
2685    // check torch client
2686    handleTorchClientBinderDied(who);
2687
2688    // check camera device client
2689    if(!evictClientIdByRemote(who)) {
2690        ALOGV("%s: Java client's binder death already cleaned up (normal case)", __FUNCTION__);
2691        return;
2692    }
2693
2694    ALOGE("%s: Java client's binder died, removing it from the list of active clients",
2695            __FUNCTION__);
2696}
2697
2698void CameraService::updateStatus(int32_t status, const String8& cameraId) {
2699    updateStatus(status, cameraId, {});
2700}
2701
2702void CameraService::updateStatus(int32_t status, const String8& cameraId,
2703        std::initializer_list<int32_t> rejectSourceStates) {
2704    // Do not lock mServiceLock here or can get into a deadlock from
2705    // connect() -> disconnect -> updateStatus
2706
2707    auto state = getCameraState(cameraId);
2708
2709    if (state == nullptr) {
2710        ALOGW("%s: Could not update the status for %s, no such device exists", __FUNCTION__,
2711                cameraId.string());
2712        return;
2713    }
2714
2715    // Update the status for this camera state, then send the onStatusChangedCallbacks to each
2716    // of the listeners with both the mStatusStatus and mStatusListenerLock held
2717    state->updateStatus(status, cameraId, rejectSourceStates, [this]
2718            (const String8& cameraId, int32_t status) {
2719
2720            if (status != ICameraServiceListener::STATUS_ENUMERATING) {
2721                // Update torch status if it has a flash unit.
2722                Mutex::Autolock al(mTorchStatusMutex);
2723                int32_t torchStatus;
2724                if (getTorchStatusLocked(cameraId, &torchStatus) !=
2725                        NAME_NOT_FOUND) {
2726                    int32_t newTorchStatus =
2727                            status == ICameraServiceListener::STATUS_PRESENT ?
2728                            ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF :
2729                            ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE;
2730                    if (torchStatus != newTorchStatus) {
2731                        onTorchStatusChangedLocked(cameraId, newTorchStatus);
2732                    }
2733                }
2734            }
2735
2736            Mutex::Autolock lock(mStatusListenerLock);
2737
2738            for (auto& listener : mListenerList) {
2739                // TODO: Refactor status listeners to use strings for Camera IDs and remove this.
2740                int id = cameraIdToInt(cameraId);
2741                if (id != -1) listener->onStatusChanged(status, id);
2742            }
2743        });
2744}
2745
2746void CameraService::updateProxyDeviceState(ICameraServiceProxy::CameraState newState,
2747        const String8& cameraId) {
2748    sp<ICameraServiceProxy> proxyBinder = getCameraServiceProxy();
2749    if (proxyBinder == nullptr) return;
2750    String16 id(cameraId);
2751    proxyBinder->notifyCameraState(id, newState);
2752}
2753
2754status_t CameraService::getTorchStatusLocked(
2755        const String8& cameraId,
2756        int32_t *status) const {
2757    if (!status) {
2758        return BAD_VALUE;
2759    }
2760    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2761    if (index == NAME_NOT_FOUND) {
2762        // invalid camera ID or the camera doesn't have a flash unit
2763        return NAME_NOT_FOUND;
2764    }
2765
2766    *status = mTorchStatusMap.valueAt(index);
2767    return OK;
2768}
2769
2770status_t CameraService::setTorchStatusLocked(const String8& cameraId,
2771        int32_t status) {
2772    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2773    if (index == NAME_NOT_FOUND) {
2774        return BAD_VALUE;
2775    }
2776    int32_t& item =
2777            mTorchStatusMap.editValueAt(index);
2778    item = status;
2779
2780    return OK;
2781}
2782
2783}; // namespace android
2784