CameraService.cpp revision 1bbe0a4c47997d33ad02192df612ad9f2ef25fed 
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 <media/AudioSystem.h>
45#include <media/IMediaHTTPService.h>
46#include <media/mediaplayer.h>
47#include <mediautils/BatteryNotifier.h>
48#include <utils/Errors.h>
49#include <utils/Log.h>
50#include <utils/String16.h>
51#include <utils/Trace.h>
52#include <private/android_filesystem_config.h>
53#include <system/camera_vendor_tags.h>
54#include <system/camera_metadata.h>
55#include <system/camera.h>
56
57#include "CameraService.h"
58#include "api1/CameraClient.h"
59#include "api1/Camera2Client.h"
60#include "api2/CameraDeviceClient.h"
61#include "utils/CameraTraces.h"
62
63namespace {
64    const char* kPermissionServiceName = "permission";
65}; // namespace anonymous
66
67namespace android {
68
69using binder::Status;
70using namespace hardware;
71
72// ----------------------------------------------------------------------------
73// Logging support -- this is for debugging only
74// Use "adb shell dumpsys media.camera -v 1" to change it.
75volatile int32_t gLogLevel = 0;
76
77#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__);
78#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__);
79
80static void setLogLevel(int level) {
81    android_atomic_write(level, &gLogLevel);
82}
83
84// Convenience methods for constructing binder::Status objects for error returns
85
86#define STATUS_ERROR(errorCode, errorString) \
87    binder::Status::fromServiceSpecificError(errorCode, \
88            String8::format("%s:%d: %s", __FUNCTION__, __LINE__, errorString))
89
90#define STATUS_ERROR_FMT(errorCode, errorString, ...) \
91    binder::Status::fromServiceSpecificError(errorCode, \
92            String8::format("%s:%d: " errorString, __FUNCTION__, __LINE__, \
93                    __VA_ARGS__))
94
95// ----------------------------------------------------------------------------
96
97extern "C" {
98static void camera_device_status_change(
99        const struct camera_module_callbacks* callbacks,
100        int camera_id,
101        int new_status) {
102    sp<CameraService> cs = const_cast<CameraService*>(
103            static_cast<const CameraService*>(callbacks));
104
105    cs->onDeviceStatusChanged(camera_id,
106            static_cast<camera_device_status_t>(new_status));
107}
108
109static void torch_mode_status_change(
110        const struct camera_module_callbacks* callbacks,
111        const char* camera_id,
112        int new_status) {
113    if (!callbacks || !camera_id) {
114        ALOGE("%s invalid parameters. callbacks %p, camera_id %p", __FUNCTION__,
115                callbacks, camera_id);
116    }
117    sp<CameraService> cs = const_cast<CameraService*>(
118                                static_cast<const CameraService*>(callbacks));
119
120    int32_t status;
121    switch (new_status) {
122        case TORCH_MODE_STATUS_NOT_AVAILABLE:
123            status = ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE;
124            break;
125        case TORCH_MODE_STATUS_AVAILABLE_OFF:
126            status = ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF;
127            break;
128        case TORCH_MODE_STATUS_AVAILABLE_ON:
129            status = ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON;
130            break;
131        default:
132            ALOGE("Unknown torch status %d", new_status);
133            return;
134    }
135
136    cs->onTorchStatusChanged(
137        String8(camera_id),
138        status);
139}
140} // extern "C"
141
142// ----------------------------------------------------------------------------
143
144// This is ugly and only safe if we never re-create the CameraService, but
145// should be ok for now.
146static CameraService *gCameraService;
147
148CameraService::CameraService() :
149        mEventLog(DEFAULT_EVENT_LOG_LENGTH),
150        mNumberOfCameras(0), mNumberOfNormalCameras(0),
151        mSoundRef(0), mModule(nullptr) {
152    ALOGI("CameraService started (pid=%d)", getpid());
153    gCameraService = this;
154
155    this->camera_device_status_change = android::camera_device_status_change;
156    this->torch_mode_status_change = android::torch_mode_status_change;
157
158    mServiceLockWrapper = std::make_shared<WaitableMutexWrapper>(&mServiceLock);
159}
160
161void CameraService::onFirstRef()
162{
163    ALOGI("CameraService process starting");
164
165    BnCameraService::onFirstRef();
166
167    // Update battery life tracking if service is restarting
168    BatteryNotifier& notifier(BatteryNotifier::getInstance());
169    notifier.noteResetCamera();
170    notifier.noteResetFlashlight();
171
172    camera_module_t *rawModule;
173    int err = hw_get_module(CAMERA_HARDWARE_MODULE_ID,
174            (const hw_module_t **)&rawModule);
175    if (err < 0) {
176        ALOGE("Could not load camera HAL module: %d (%s)", err, strerror(-err));
177        logServiceError("Could not load camera HAL module", err);
178        return;
179    }
180
181    mModule = new CameraModule(rawModule);
182    err = mModule->init();
183    if (err != OK) {
184        ALOGE("Could not initialize camera HAL module: %d (%s)", err,
185            strerror(-err));
186        logServiceError("Could not initialize camera HAL module", err);
187
188        delete mModule;
189        mModule = nullptr;
190        return;
191    }
192    ALOGI("Loaded \"%s\" camera module", mModule->getModuleName());
193
194    mNumberOfCameras = mModule->getNumberOfCameras();
195    mNumberOfNormalCameras = mNumberOfCameras;
196
197    // Setup vendor tags before we call get_camera_info the first time
198    // because HAL might need to setup static vendor keys in get_camera_info
199    VendorTagDescriptor::clearGlobalVendorTagDescriptor();
200    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_2) {
201        setUpVendorTags();
202    }
203
204    mFlashlight = new CameraFlashlight(*mModule, *this);
205    status_t res = mFlashlight->findFlashUnits();
206    if (res) {
207        // impossible because we haven't open any camera devices.
208        ALOGE("Failed to find flash units.");
209    }
210
211    int latestStrangeCameraId = INT_MAX;
212    for (int i = 0; i < mNumberOfCameras; i++) {
213        String8 cameraId = String8::format("%d", i);
214
215        // Get camera info
216
217        struct camera_info info;
218        bool haveInfo = true;
219        status_t rc = mModule->getCameraInfo(i, &info);
220        if (rc != NO_ERROR) {
221            ALOGE("%s: Received error loading camera info for device %d, cost and"
222                    " conflicting devices fields set to defaults for this device.",
223                    __FUNCTION__, i);
224            haveInfo = false;
225        }
226
227        // Check for backwards-compatibility support
228        if (haveInfo) {
229            if (checkCameraCapabilities(i, info, &latestStrangeCameraId) != OK) {
230                delete mModule;
231                mModule = nullptr;
232                return;
233            }
234        }
235
236        // Defaults to use for cost and conflicting devices
237        int cost = 100;
238        char** conflicting_devices = nullptr;
239        size_t conflicting_devices_length = 0;
240
241        // If using post-2.4 module version, query the cost + conflicting devices from the HAL
242        if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_4 && haveInfo) {
243            cost = info.resource_cost;
244            conflicting_devices = info.conflicting_devices;
245            conflicting_devices_length = info.conflicting_devices_length;
246        }
247
248        std::set<String8> conflicting;
249        for (size_t i = 0; i < conflicting_devices_length; i++) {
250            conflicting.emplace(String8(conflicting_devices[i]));
251        }
252
253        // Initialize state for each camera device
254        {
255            Mutex::Autolock lock(mCameraStatesLock);
256            mCameraStates.emplace(cameraId, std::make_shared<CameraState>(cameraId, cost,
257                    conflicting));
258        }
259
260        if (mFlashlight->hasFlashUnit(cameraId)) {
261            mTorchStatusMap.add(cameraId,
262                    ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF);
263        }
264    }
265
266    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_1) {
267        mModule->setCallbacks(this);
268    }
269
270    CameraService::pingCameraServiceProxy();
271}
272
273sp<ICameraServiceProxy> CameraService::getCameraServiceProxy() {
274    sp<ICameraServiceProxy> proxyBinder = nullptr;
275#ifndef __BRILLO__
276    sp<IServiceManager> sm = defaultServiceManager();
277    sp<IBinder> binder = sm->getService(String16("media.camera.proxy"));
278    if (binder != nullptr) {
279        proxyBinder = interface_cast<ICameraServiceProxy>(binder);
280    }
281#endif
282    return proxyBinder;
283}
284
285void CameraService::pingCameraServiceProxy() {
286    sp<ICameraServiceProxy> proxyBinder = getCameraServiceProxy();
287    if (proxyBinder == nullptr) return;
288    proxyBinder->pingForUserUpdate();
289}
290
291CameraService::~CameraService() {
292    if (mModule) {
293        delete mModule;
294        mModule = nullptr;
295    }
296    VendorTagDescriptor::clearGlobalVendorTagDescriptor();
297    gCameraService = nullptr;
298}
299
300void CameraService::onDeviceStatusChanged(int  cameraId,
301        camera_device_status_t newStatus) {
302    ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__,
303          cameraId, newStatus);
304
305    String8 id = String8::format("%d", cameraId);
306    std::shared_ptr<CameraState> state = getCameraState(id);
307
308    if (state == nullptr) {
309        ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId);
310        return;
311    }
312
313    int32_t oldStatus = state->getStatus();
314
315    if (oldStatus == static_cast<int32_t>(newStatus)) {
316        ALOGE("%s: State transition to the same status %#x not allowed", __FUNCTION__, newStatus);
317        return;
318    }
319
320    if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) {
321        logDeviceRemoved(id, String8::format("Device status changed from %d to %d", oldStatus,
322                newStatus));
323        sp<BasicClient> clientToDisconnect;
324        {
325            // Don't do this in updateStatus to avoid deadlock over mServiceLock
326            Mutex::Autolock lock(mServiceLock);
327
328            // Set the device status to NOT_PRESENT, clients will no longer be able to connect
329            // to this device until the status changes
330            updateStatus(ICameraServiceListener::STATUS_NOT_PRESENT, id);
331
332            // Remove cached shim parameters
333            state->setShimParams(CameraParameters());
334
335            // Remove the client from the list of active clients
336            clientToDisconnect = removeClientLocked(id);
337
338            // Notify the client of disconnection
339            clientToDisconnect->notifyError(
340                    hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
341                    CaptureResultExtras{});
342        }
343
344        ALOGI("%s: Client for camera ID %s evicted due to device status change from HAL",
345                __FUNCTION__, id.string());
346
347        // Disconnect client
348        if (clientToDisconnect.get() != nullptr) {
349            // Ensure not in binder RPC so client disconnect PID checks work correctly
350            LOG_ALWAYS_FATAL_IF(getCallingPid() != getpid(),
351                    "onDeviceStatusChanged must be called from the camera service process!");
352            clientToDisconnect->disconnect();
353        }
354
355    } else {
356        if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
357            logDeviceAdded(id, String8::format("Device status changed from %d to %d", oldStatus,
358                    newStatus));
359        }
360        updateStatus(static_cast<int32_t>(newStatus), id);
361    }
362
363}
364
365void CameraService::onTorchStatusChanged(const String8& cameraId,
366        int32_t newStatus) {
367    Mutex::Autolock al(mTorchStatusMutex);
368    onTorchStatusChangedLocked(cameraId, newStatus);
369}
370
371void CameraService::onTorchStatusChangedLocked(const String8& cameraId,
372        int32_t newStatus) {
373    ALOGI("%s: Torch status changed for cameraId=%s, newStatus=%d",
374            __FUNCTION__, cameraId.string(), newStatus);
375
376    int32_t status;
377    status_t res = getTorchStatusLocked(cameraId, &status);
378    if (res) {
379        ALOGE("%s: cannot get torch status of camera %s: %s (%d)",
380                __FUNCTION__, cameraId.string(), strerror(-res), res);
381        return;
382    }
383    if (status == newStatus) {
384        return;
385    }
386
387    res = setTorchStatusLocked(cameraId, newStatus);
388    if (res) {
389        ALOGE("%s: Failed to set the torch status to %d: %s (%d)", __FUNCTION__,
390                (uint32_t)newStatus, strerror(-res), res);
391        return;
392    }
393
394    {
395        // Update battery life logging for flashlight
396        Mutex::Autolock al(mTorchUidMapMutex);
397        auto iter = mTorchUidMap.find(cameraId);
398        if (iter != mTorchUidMap.end()) {
399            int oldUid = iter->second.second;
400            int newUid = iter->second.first;
401            BatteryNotifier& notifier(BatteryNotifier::getInstance());
402            if (oldUid != newUid) {
403                // If the UID has changed, log the status and update current UID in mTorchUidMap
404                if (status == ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON) {
405                    notifier.noteFlashlightOff(cameraId, oldUid);
406                }
407                if (newStatus == ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON) {
408                    notifier.noteFlashlightOn(cameraId, newUid);
409                }
410                iter->second.second = newUid;
411            } else {
412                // If the UID has not changed, log the status
413                if (newStatus == ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON) {
414                    notifier.noteFlashlightOn(cameraId, oldUid);
415                } else {
416                    notifier.noteFlashlightOff(cameraId, oldUid);
417                }
418            }
419        }
420    }
421
422    {
423        Mutex::Autolock lock(mStatusListenerLock);
424        for (auto& i : mListenerList) {
425            i->onTorchStatusChanged(newStatus, String16{cameraId});
426        }
427    }
428}
429
430Status CameraService::getNumberOfCameras(int32_t type, int32_t* numCameras) {
431    ATRACE_CALL();
432    switch (type) {
433        case CAMERA_TYPE_BACKWARD_COMPATIBLE:
434            *numCameras = mNumberOfNormalCameras;
435            break;
436        case CAMERA_TYPE_ALL:
437            *numCameras = mNumberOfCameras;
438            break;
439        default:
440            ALOGW("%s: Unknown camera type %d",
441                    __FUNCTION__, type);
442            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
443                    "Unknown camera type %d", type);
444    }
445    return Status::ok();
446}
447
448Status CameraService::getCameraInfo(int cameraId,
449        CameraInfo* cameraInfo) {
450    ATRACE_CALL();
451    if (!mModule) {
452        return STATUS_ERROR(ERROR_DISCONNECTED,
453                "Camera subsystem is not available");
454    }
455
456    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
457        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT,
458                "CameraId is not valid");
459    }
460
461    struct camera_info info;
462    Status rc = filterGetInfoErrorCode(
463        mModule->getCameraInfo(cameraId, &info));
464
465    if (rc.isOk()) {
466        cameraInfo->facing = info.facing;
467        cameraInfo->orientation = info.orientation;
468    }
469    return rc;
470}
471
472int CameraService::cameraIdToInt(const String8& cameraId) {
473    errno = 0;
474    size_t pos = 0;
475    int ret = stoi(std::string{cameraId.string()}, &pos);
476    if (errno != 0 || pos != cameraId.size()) {
477        return -1;
478    }
479    return ret;
480}
481
482Status CameraService::generateShimMetadata(int cameraId, /*out*/CameraMetadata* cameraInfo) {
483    ATRACE_CALL();
484
485    Status ret = Status::ok();
486
487    struct CameraInfo info;
488    if (!(ret = getCameraInfo(cameraId, &info)).isOk()) {
489        return ret;
490    }
491
492    CameraMetadata shimInfo;
493    int32_t orientation = static_cast<int32_t>(info.orientation);
494    status_t rc;
495    if ((rc = shimInfo.update(ANDROID_SENSOR_ORIENTATION, &orientation, 1)) != OK) {
496        return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
497                "Error updating metadata: %d (%s)", rc, strerror(-rc));
498    }
499
500    uint8_t facing = (info.facing == CAMERA_FACING_FRONT) ?
501            ANDROID_LENS_FACING_FRONT : ANDROID_LENS_FACING_BACK;
502    if ((rc = shimInfo.update(ANDROID_LENS_FACING, &facing, 1)) != OK) {
503        return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
504                "Error updating metadata: %d (%s)", rc, strerror(-rc));
505    }
506
507    CameraParameters shimParams;
508    if (!(ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)).isOk()) {
509        // Error logged by callee
510        return ret;
511    }
512
513    Vector<Size> sizes;
514    Vector<Size> jpegSizes;
515    Vector<int32_t> formats;
516    {
517        shimParams.getSupportedPreviewSizes(/*out*/sizes);
518        shimParams.getSupportedPreviewFormats(/*out*/formats);
519        shimParams.getSupportedPictureSizes(/*out*/jpegSizes);
520    }
521
522    // Always include IMPLEMENTATION_DEFINED
523    formats.add(HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED);
524
525    const size_t INTS_PER_CONFIG = 4;
526
527    // Build available stream configurations metadata
528    size_t streamConfigSize = (sizes.size() * formats.size() + jpegSizes.size()) * INTS_PER_CONFIG;
529
530    Vector<int32_t> streamConfigs;
531    streamConfigs.setCapacity(streamConfigSize);
532
533    for (size_t i = 0; i < formats.size(); ++i) {
534        for (size_t j = 0; j < sizes.size(); ++j) {
535            streamConfigs.add(formats[i]);
536            streamConfigs.add(sizes[j].width);
537            streamConfigs.add(sizes[j].height);
538            streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
539        }
540    }
541
542    for (size_t i = 0; i < jpegSizes.size(); ++i) {
543        streamConfigs.add(HAL_PIXEL_FORMAT_BLOB);
544        streamConfigs.add(jpegSizes[i].width);
545        streamConfigs.add(jpegSizes[i].height);
546        streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
547    }
548
549    if ((rc = shimInfo.update(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS,
550            streamConfigs.array(), streamConfigSize)) != OK) {
551        return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
552                "Error updating metadata: %d (%s)", rc, strerror(-rc));
553    }
554
555    int64_t fakeMinFrames[0];
556    // TODO: Fixme, don't fake min frame durations.
557    if ((rc = shimInfo.update(ANDROID_SCALER_AVAILABLE_MIN_FRAME_DURATIONS,
558            fakeMinFrames, 0)) != OK) {
559        return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
560                "Error updating metadata: %d (%s)", rc, strerror(-rc));
561    }
562
563    int64_t fakeStalls[0];
564    // TODO: Fixme, don't fake stall durations.
565    if ((rc = shimInfo.update(ANDROID_SCALER_AVAILABLE_STALL_DURATIONS,
566            fakeStalls, 0)) != OK) {
567        return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
568                "Error updating metadata: %d (%s)", rc, strerror(-rc));
569    }
570
571    *cameraInfo = shimInfo;
572    return ret;
573}
574
575Status CameraService::getCameraCharacteristics(int cameraId,
576                                                CameraMetadata* cameraInfo) {
577    ATRACE_CALL();
578    if (!cameraInfo) {
579        ALOGE("%s: cameraInfo is NULL", __FUNCTION__);
580        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "cameraInfo is NULL");
581    }
582
583    if (!mModule) {
584        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
585        return STATUS_ERROR(ERROR_DISCONNECTED,
586                "Camera subsystem is not available");;
587    }
588
589    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
590        ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId);
591        return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
592                "Invalid camera id: %d", cameraId);
593    }
594
595    int facing;
596    Status ret;
597    if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0 ||
598            getDeviceVersion(cameraId, &facing) < CAMERA_DEVICE_API_VERSION_3_0) {
599        /**
600         * Backwards compatibility mode for old HALs:
601         * - Convert CameraInfo into static CameraMetadata properties.
602         * - Retrieve cached CameraParameters for this camera.  If none exist,
603         *   attempt to open CameraClient and retrieve the CameraParameters.
604         * - Convert cached CameraParameters into static CameraMetadata
605         *   properties.
606         */
607        ALOGI("%s: Switching to HAL1 shim implementation...", __FUNCTION__);
608
609        ret = generateShimMetadata(cameraId, cameraInfo);
610    } else {
611        /**
612         * Normal HAL 2.1+ codepath.
613         */
614        struct camera_info info;
615        ret = filterGetInfoErrorCode(mModule->getCameraInfo(cameraId, &info));
616        if (ret.isOk()) {
617            *cameraInfo = info.static_camera_characteristics;
618        }
619    }
620
621    return ret;
622}
623
624int CameraService::getCallingPid() {
625    return IPCThreadState::self()->getCallingPid();
626}
627
628int CameraService::getCallingUid() {
629    return IPCThreadState::self()->getCallingUid();
630}
631
632String8 CameraService::getFormattedCurrentTime() {
633    time_t now = time(nullptr);
634    char formattedTime[64];
635    strftime(formattedTime, sizeof(formattedTime), "%m-%d %H:%M:%S", localtime(&now));
636    return String8(formattedTime);
637}
638
639int CameraService::getCameraPriorityFromProcState(int procState) {
640    // Find the priority for the camera usage based on the process state.  Higher priority clients
641    // win for evictions.
642    if (procState < 0) {
643        ALOGE("%s: Received invalid process state %d from ActivityManagerService!", __FUNCTION__,
644                procState);
645        return -1;
646    }
647    // Treat sleeping TOP processes the same as regular TOP processes, for
648    // access priority.  This is important for lock-screen camera launch scenarios
649    if (procState == PROCESS_STATE_TOP_SLEEPING) {
650        procState = PROCESS_STATE_TOP;
651    }
652    return INT_MAX - procState;
653}
654
655Status CameraService::getCameraVendorTagDescriptor(
656        /*out*/
657        hardware::camera2::params::VendorTagDescriptor* desc) {
658    ATRACE_CALL();
659    if (!mModule) {
660        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
661        return STATUS_ERROR(ERROR_DISCONNECTED, "Camera subsystem not available");
662    }
663    sp<VendorTagDescriptor> globalDescriptor = VendorTagDescriptor::getGlobalVendorTagDescriptor();
664    if (globalDescriptor != nullptr) {
665        *desc = *(globalDescriptor.get());
666    }
667    return Status::ok();
668}
669
670int CameraService::getDeviceVersion(int cameraId, int* facing) {
671    ATRACE_CALL();
672    struct camera_info info;
673    if (mModule->getCameraInfo(cameraId, &info) != OK) {
674        return -1;
675    }
676
677    int deviceVersion;
678    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) {
679        deviceVersion = info.device_version;
680    } else {
681        deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
682    }
683
684    if (facing) {
685        *facing = info.facing;
686    }
687
688    return deviceVersion;
689}
690
691Status CameraService::filterGetInfoErrorCode(status_t err) {
692    switch(err) {
693        case NO_ERROR:
694            return Status::ok();
695        case -EINVAL:
696            return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT,
697                    "CameraId is not valid for HAL module");
698        case -ENODEV:
699            return STATUS_ERROR(ERROR_DISCONNECTED,
700                    "Camera device not available");
701        default:
702            return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
703                    "Camera HAL encountered error %d: %s",
704                    err, strerror(-err));
705    }
706}
707
708bool CameraService::setUpVendorTags() {
709    ATRACE_CALL();
710    vendor_tag_ops_t vOps = vendor_tag_ops_t();
711
712    // Check if vendor operations have been implemented
713    if (!mModule->isVendorTagDefined()) {
714        ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__);
715        return false;
716    }
717
718    mModule->getVendorTagOps(&vOps);
719
720    // Ensure all vendor operations are present
721    if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL ||
722            vOps.get_section_name == NULL || vOps.get_tag_name == NULL ||
723            vOps.get_tag_type == NULL) {
724        ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions."
725               , __FUNCTION__);
726        return false;
727    }
728
729    // Read all vendor tag definitions into a descriptor
730    sp<VendorTagDescriptor> desc;
731    status_t res;
732    if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc))
733            != OK) {
734        ALOGE("%s: Could not generate descriptor from vendor tag operations,"
735              "received error %s (%d). Camera clients will not be able to use"
736              "vendor tags", __FUNCTION__, strerror(res), res);
737        return false;
738    }
739
740    // Set the global descriptor to use with camera metadata
741    VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc);
742    return true;
743}
744
745Status CameraService::makeClient(const sp<CameraService>& cameraService,
746        const sp<IInterface>& cameraCb, const String16& packageName, int cameraId,
747        int facing, int clientPid, uid_t clientUid, int servicePid, bool legacyMode,
748        int halVersion, int deviceVersion, apiLevel effectiveApiLevel,
749        /*out*/sp<BasicClient>* client) {
750
751    if (halVersion < 0 || halVersion == deviceVersion) {
752        // Default path: HAL version is unspecified by caller, create CameraClient
753        // based on device version reported by the HAL.
754        switch(deviceVersion) {
755          case CAMERA_DEVICE_API_VERSION_1_0:
756            if (effectiveApiLevel == API_1) {  // Camera1 API route
757                sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
758                *client = new CameraClient(cameraService, tmp, packageName, cameraId, facing,
759                        clientPid, clientUid, getpid(), legacyMode);
760            } else { // Camera2 API route
761                ALOGW("Camera using old HAL version: %d", deviceVersion);
762                return STATUS_ERROR_FMT(ERROR_DEPRECATED_HAL,
763                        "Camera device \"%d\" HAL version %d does not support camera2 API",
764                        cameraId, deviceVersion);
765            }
766            break;
767          case CAMERA_DEVICE_API_VERSION_3_0:
768          case CAMERA_DEVICE_API_VERSION_3_1:
769          case CAMERA_DEVICE_API_VERSION_3_2:
770          case CAMERA_DEVICE_API_VERSION_3_3:
771            if (effectiveApiLevel == API_1) { // Camera1 API route
772                sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
773                *client = new Camera2Client(cameraService, tmp, packageName, cameraId, facing,
774                        clientPid, clientUid, servicePid, legacyMode);
775            } else { // Camera2 API route
776                sp<hardware::camera2::ICameraDeviceCallbacks> tmp =
777                        static_cast<hardware::camera2::ICameraDeviceCallbacks*>(cameraCb.get());
778                *client = new CameraDeviceClient(cameraService, tmp, packageName, cameraId,
779                        facing, clientPid, clientUid, servicePid);
780            }
781            break;
782          default:
783            // Should not be reachable
784            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
785            return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
786                    "Camera device \"%d\" has unknown HAL version %d",
787                    cameraId, deviceVersion);
788        }
789    } else {
790        // A particular HAL version is requested by caller. Create CameraClient
791        // based on the requested HAL version.
792        if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 &&
793            halVersion == CAMERA_DEVICE_API_VERSION_1_0) {
794            // Only support higher HAL version device opened as HAL1.0 device.
795            sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
796            *client = new CameraClient(cameraService, tmp, packageName, cameraId, facing,
797                    clientPid, clientUid, servicePid, legacyMode);
798        } else {
799            // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet.
800            ALOGE("Invalid camera HAL version %x: HAL %x device can only be"
801                    " opened as HAL %x device", halVersion, deviceVersion,
802                    CAMERA_DEVICE_API_VERSION_1_0);
803            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
804                    "Camera device \"%d\" (HAL version %d) cannot be opened as HAL version %d",
805                    cameraId, deviceVersion, halVersion);
806        }
807    }
808    return Status::ok();
809}
810
811String8 CameraService::toString(std::set<userid_t> intSet) {
812    String8 s("");
813    bool first = true;
814    for (userid_t i : intSet) {
815        if (first) {
816            s.appendFormat("%d", i);
817            first = false;
818        } else {
819            s.appendFormat(", %d", i);
820        }
821    }
822    return s;
823}
824
825Status CameraService::initializeShimMetadata(int cameraId) {
826    int uid = getCallingUid();
827
828    String16 internalPackageName("cameraserver");
829    String8 id = String8::format("%d", cameraId);
830    Status ret = Status::ok();
831    sp<Client> tmp = nullptr;
832    if (!(ret = connectHelper<ICameraClient,Client>(
833            sp<ICameraClient>{nullptr}, id, static_cast<int>(CAMERA_HAL_API_VERSION_UNSPECIFIED),
834            internalPackageName, uid, USE_CALLING_PID,
835            API_1, /*legacyMode*/ false, /*shimUpdateOnly*/ true,
836            /*out*/ tmp)
837            ).isOk()) {
838        ALOGE("%s: Error initializing shim metadata: %s", __FUNCTION__, ret.toString8().string());
839    }
840    return ret;
841}
842
843Status CameraService::getLegacyParametersLazy(int cameraId,
844        /*out*/
845        CameraParameters* parameters) {
846
847    ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId);
848
849    Status ret = Status::ok();
850
851    if (parameters == NULL) {
852        ALOGE("%s: parameters must not be null", __FUNCTION__);
853        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Parameters must not be null");
854    }
855
856    String8 id = String8::format("%d", cameraId);
857
858    // Check if we already have parameters
859    {
860        // Scope for service lock
861        Mutex::Autolock lock(mServiceLock);
862        auto cameraState = getCameraState(id);
863        if (cameraState == nullptr) {
864            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
865            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
866                    "Invalid camera ID: %s", id.string());
867        }
868        CameraParameters p = cameraState->getShimParams();
869        if (!p.isEmpty()) {
870            *parameters = p;
871            return ret;
872        }
873    }
874
875    int64_t token = IPCThreadState::self()->clearCallingIdentity();
876    ret = initializeShimMetadata(cameraId);
877    IPCThreadState::self()->restoreCallingIdentity(token);
878    if (!ret.isOk()) {
879        // Error already logged by callee
880        return ret;
881    }
882
883    // Check for parameters again
884    {
885        // Scope for service lock
886        Mutex::Autolock lock(mServiceLock);
887        auto cameraState = getCameraState(id);
888        if (cameraState == nullptr) {
889            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
890            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
891                    "Invalid camera ID: %s", id.string());
892        }
893        CameraParameters p = cameraState->getShimParams();
894        if (!p.isEmpty()) {
895            *parameters = p;
896            return ret;
897        }
898    }
899
900    ALOGE("%s: Parameters were not initialized, or were empty.  Device may not be present.",
901            __FUNCTION__);
902    return STATUS_ERROR(ERROR_INVALID_OPERATION, "Unable to initialize legacy parameters");
903}
904
905// Can camera service trust the caller based on the calling UID?
906static bool isTrustedCallingUid(uid_t uid) {
907    switch (uid) {
908        case AID_MEDIA:         // mediaserver
909        case AID_CAMERASERVER: // cameraserver
910            return true;
911        default:
912            return false;
913    }
914}
915
916Status CameraService::validateConnectLocked(const String8& cameraId,
917        const String8& clientName8, /*inout*/int& clientUid, /*inout*/int& clientPid) const {
918
919#if !defined(__BRILLO__)
920    Status allowed = validateClientPermissionsLocked(cameraId, clientName8, clientUid, clientPid);
921    if (!allowed.isOk()) {
922        return allowed;
923    }
924#endif  // defined(__BRILLO__)
925
926    int callingPid = getCallingPid();
927
928    if (!mModule) {
929        ALOGE("CameraService::connect X (PID %d) rejected (camera HAL module not loaded)",
930                callingPid);
931        return STATUS_ERROR_FMT(ERROR_DISCONNECTED,
932                "No camera HAL module available to open camera device \"%s\"", cameraId.string());
933    }
934
935    if (getCameraState(cameraId) == nullptr) {
936        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
937                cameraId.string());
938        return STATUS_ERROR_FMT(ERROR_DISCONNECTED,
939                "No camera device with ID \"%s\" available", cameraId.string());
940    }
941
942    status_t err = checkIfDeviceIsUsable(cameraId);
943    if (err != NO_ERROR) {
944        switch(err) {
945            case -ENODEV:
946            case -EBUSY:
947                return STATUS_ERROR_FMT(ERROR_DISCONNECTED,
948                        "No camera device with ID \"%s\" currently available", cameraId.string());
949            default:
950                return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
951                        "Unknown error connecting to ID \"%s\"", cameraId.string());
952        }
953    }
954    return Status::ok();
955}
956
957Status CameraService::validateClientPermissionsLocked(const String8& cameraId,
958        const String8& clientName8, int& clientUid, int& clientPid) const {
959    int callingPid = getCallingPid();
960    int callingUid = getCallingUid();
961
962    // Check if we can trust clientUid
963    if (clientUid == USE_CALLING_UID) {
964        clientUid = callingUid;
965    } else if (!isTrustedCallingUid(callingUid)) {
966        ALOGE("CameraService::connect X (calling PID %d, calling UID %d) rejected "
967                "(don't trust clientUid %d)", callingPid, callingUid, clientUid);
968        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
969                "Untrusted caller (calling PID %d, UID %d) trying to "
970                "forward camera access to camera %s for client %s (PID %d, UID %d)",
971                callingPid, callingUid, cameraId.string(),
972                clientName8.string(), clientUid, clientPid);
973    }
974
975    // Check if we can trust clientPid
976    if (clientPid == USE_CALLING_PID) {
977        clientPid = callingPid;
978    } else if (!isTrustedCallingUid(callingUid)) {
979        ALOGE("CameraService::connect X (calling PID %d, calling UID %d) rejected "
980                "(don't trust clientPid %d)", callingPid, callingUid, clientPid);
981        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
982                "Untrusted caller (calling PID %d, UID %d) trying to "
983                "forward camera access to camera %s for client %s (PID %d, UID %d)",
984                callingPid, callingUid, cameraId.string(),
985                clientName8.string(), clientUid, clientPid);
986    }
987
988    // If it's not calling from cameraserver, check the permission.
989    if (callingPid != getpid() &&
990            !checkPermission(String16("android.permission.CAMERA"), clientPid, clientUid)) {
991        ALOGE("Permission Denial: can't use the camera pid=%d, uid=%d", clientPid, clientUid);
992        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
993                "Caller \"%s\" (PID %d, UID %d) cannot open camera \"%s\" without camera permission",
994                clientName8.string(), clientUid, clientPid, cameraId.string());
995    }
996
997    userid_t clientUserId = multiuser_get_user_id(clientUid);
998
999    // Only allow clients who are being used by the current foreground device user, unless calling
1000    // from our own process.
1001    if (callingPid != getpid() && (mAllowedUsers.find(clientUserId) == mAllowedUsers.end())) {
1002        ALOGE("CameraService::connect X (PID %d) rejected (cannot connect from "
1003                "device user %d, currently allowed device users: %s)", callingPid, clientUserId,
1004                toString(mAllowedUsers).string());
1005        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
1006                "Callers from device user %d are not currently allowed to connect to camera \"%s\"",
1007                clientUserId, cameraId.string());
1008    }
1009
1010    return Status::ok();
1011}
1012
1013status_t CameraService::checkIfDeviceIsUsable(const String8& cameraId) const {
1014    auto cameraState = getCameraState(cameraId);
1015    int callingPid = getCallingPid();
1016    if (cameraState == nullptr) {
1017        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
1018                cameraId.string());
1019        return -ENODEV;
1020    }
1021
1022    int32_t currentStatus = cameraState->getStatus();
1023    if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
1024        ALOGE("CameraService::connect X (PID %d) rejected (camera %s is not connected)",
1025                callingPid, cameraId.string());
1026        return -ENODEV;
1027    } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
1028        ALOGE("CameraService::connect X (PID %d) rejected, (camera %s is initializing)",
1029                callingPid, cameraId.string());
1030        return -EBUSY;
1031    }
1032
1033    return NO_ERROR;
1034}
1035
1036void CameraService::finishConnectLocked(const sp<BasicClient>& client,
1037        const CameraService::DescriptorPtr& desc) {
1038
1039    // Make a descriptor for the incoming client
1040    auto clientDescriptor = CameraService::CameraClientManager::makeClientDescriptor(client, desc);
1041    auto evicted = mActiveClientManager.addAndEvict(clientDescriptor);
1042
1043    logConnected(desc->getKey(), static_cast<int>(desc->getOwnerId()),
1044            String8(client->getPackageName()));
1045
1046    if (evicted.size() > 0) {
1047        // This should never happen - clients should already have been removed in disconnect
1048        for (auto& i : evicted) {
1049            ALOGE("%s: Invalid state: Client for camera %s was not removed in disconnect",
1050                    __FUNCTION__, i->getKey().string());
1051        }
1052
1053        LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, clients not evicted properly",
1054                __FUNCTION__);
1055    }
1056
1057    // And register a death notification for the client callback. Do
1058    // this last to avoid Binder policy where a nested Binder
1059    // transaction might be pre-empted to service the client death
1060    // notification if the client process dies before linkToDeath is
1061    // invoked.
1062    sp<IBinder> remoteCallback = client->getRemote();
1063    if (remoteCallback != nullptr) {
1064        remoteCallback->linkToDeath(this);
1065    }
1066}
1067
1068status_t CameraService::handleEvictionsLocked(const String8& cameraId, int clientPid,
1069        apiLevel effectiveApiLevel, const sp<IBinder>& remoteCallback, const String8& packageName,
1070        /*out*/
1071        sp<BasicClient>* client,
1072        std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>* partial) {
1073    ATRACE_CALL();
1074    status_t ret = NO_ERROR;
1075    std::vector<DescriptorPtr> evictedClients;
1076    DescriptorPtr clientDescriptor;
1077    {
1078        if (effectiveApiLevel == API_1) {
1079            // If we are using API1, any existing client for this camera ID with the same remote
1080            // should be returned rather than evicted to allow MediaRecorder to work properly.
1081
1082            auto current = mActiveClientManager.get(cameraId);
1083            if (current != nullptr) {
1084                auto clientSp = current->getValue();
1085                if (clientSp.get() != nullptr) { // should never be needed
1086                    if (!clientSp->canCastToApiClient(effectiveApiLevel)) {
1087                        ALOGW("CameraService connect called from same client, but with a different"
1088                                " API level, evicting prior client...");
1089                    } else if (clientSp->getRemote() == remoteCallback) {
1090                        ALOGI("CameraService::connect X (PID %d) (second call from same"
1091                                " app binder, returning the same client)", clientPid);
1092                        *client = clientSp;
1093                        return NO_ERROR;
1094                    }
1095                }
1096            }
1097        }
1098
1099        // Get current active client PIDs
1100        std::vector<int> ownerPids(mActiveClientManager.getAllOwners());
1101        ownerPids.push_back(clientPid);
1102
1103        // Use the value +PROCESS_STATE_NONEXISTENT, to avoid taking
1104        // address of PROCESS_STATE_NONEXISTENT as a reference argument
1105        // for the vector constructor. PROCESS_STATE_NONEXISTENT does
1106        // not have an out-of-class definition.
1107        std::vector<int> priorities(ownerPids.size(), +PROCESS_STATE_NONEXISTENT);
1108
1109        // Get priorites of all active PIDs
1110        ProcessInfoService::getProcessStatesFromPids(ownerPids.size(), &ownerPids[0],
1111                /*out*/&priorities[0]);
1112
1113        // Update all active clients' priorities
1114        std::map<int,int> pidToPriorityMap;
1115        for (size_t i = 0; i < ownerPids.size() - 1; i++) {
1116            pidToPriorityMap.emplace(ownerPids[i], getCameraPriorityFromProcState(priorities[i]));
1117        }
1118        mActiveClientManager.updatePriorities(pidToPriorityMap);
1119
1120        // Get state for the given cameraId
1121        auto state = getCameraState(cameraId);
1122        if (state == nullptr) {
1123            ALOGE("CameraService::connect X (PID %d) rejected (no camera device with ID %s)",
1124                clientPid, cameraId.string());
1125            // Should never get here because validateConnectLocked should have errored out
1126            return BAD_VALUE;
1127        }
1128
1129        // Make descriptor for incoming client
1130        clientDescriptor = CameraClientManager::makeClientDescriptor(cameraId,
1131                sp<BasicClient>{nullptr}, static_cast<int32_t>(state->getCost()),
1132                state->getConflicting(),
1133                getCameraPriorityFromProcState(priorities[priorities.size() - 1]), clientPid);
1134
1135        // Find clients that would be evicted
1136        auto evicted = mActiveClientManager.wouldEvict(clientDescriptor);
1137
1138        // If the incoming client was 'evicted,' higher priority clients have the camera in the
1139        // background, so we cannot do evictions
1140        if (std::find(evicted.begin(), evicted.end(), clientDescriptor) != evicted.end()) {
1141            ALOGE("CameraService::connect X (PID %d) rejected (existing client(s) with higher"
1142                    " priority).", clientPid);
1143
1144            sp<BasicClient> clientSp = clientDescriptor->getValue();
1145            String8 curTime = getFormattedCurrentTime();
1146            auto incompatibleClients =
1147                    mActiveClientManager.getIncompatibleClients(clientDescriptor);
1148
1149            String8 msg = String8::format("%s : DENIED connect device %s client for package %s "
1150                    "(PID %d, priority %d) due to eviction policy", curTime.string(),
1151                    cameraId.string(), packageName.string(), clientPid,
1152                    getCameraPriorityFromProcState(priorities[priorities.size() - 1]));
1153
1154            for (auto& i : incompatibleClients) {
1155                msg.appendFormat("\n   - Blocked by existing device %s client for package %s"
1156                        "(PID %" PRId32 ", priority %" PRId32 ")", i->getKey().string(),
1157                        String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(),
1158                        i->getPriority());
1159                ALOGE("   Conflicts with: Device %s, client package %s (PID %"
1160                        PRId32 ", priority %" PRId32 ")", i->getKey().string(),
1161                        String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(),
1162                        i->getPriority());
1163            }
1164
1165            // Log the client's attempt
1166            Mutex::Autolock l(mLogLock);
1167            mEventLog.add(msg);
1168
1169            return -EBUSY;
1170        }
1171
1172        for (auto& i : evicted) {
1173            sp<BasicClient> clientSp = i->getValue();
1174            if (clientSp.get() == nullptr) {
1175                ALOGE("%s: Invalid state: Null client in active client list.", __FUNCTION__);
1176
1177                // TODO: Remove this
1178                LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, null client in active list",
1179                        __FUNCTION__);
1180                mActiveClientManager.remove(i);
1181                continue;
1182            }
1183
1184            ALOGE("CameraService::connect evicting conflicting client for camera ID %s",
1185                    i->getKey().string());
1186            evictedClients.push_back(i);
1187
1188            // Log the clients evicted
1189            logEvent(String8::format("EVICT device %s client held by package %s (PID"
1190                    " %" PRId32 ", priority %" PRId32 ")\n   - Evicted by device %s client for"
1191                    " package %s (PID %d, priority %" PRId32 ")",
1192                    i->getKey().string(), String8{clientSp->getPackageName()}.string(),
1193                    i->getOwnerId(), i->getPriority(), cameraId.string(),
1194                    packageName.string(), clientPid,
1195                    getCameraPriorityFromProcState(priorities[priorities.size() - 1])));
1196
1197            // Notify the client of disconnection
1198            clientSp->notifyError(hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
1199                    CaptureResultExtras());
1200        }
1201    }
1202
1203    // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1204    // other clients from connecting in mServiceLockWrapper if held
1205    mServiceLock.unlock();
1206
1207    // Clear caller identity temporarily so client disconnect PID checks work correctly
1208    int64_t token = IPCThreadState::self()->clearCallingIdentity();
1209
1210    // Destroy evicted clients
1211    for (auto& i : evictedClients) {
1212        // Disconnect is blocking, and should only have returned when HAL has cleaned up
1213        i->getValue()->disconnect(); // Clients will remove themselves from the active client list
1214    }
1215
1216    IPCThreadState::self()->restoreCallingIdentity(token);
1217
1218    for (const auto& i : evictedClients) {
1219        ALOGV("%s: Waiting for disconnect to complete for client for device %s (PID %" PRId32 ")",
1220                __FUNCTION__, i->getKey().string(), i->getOwnerId());
1221        ret = mActiveClientManager.waitUntilRemoved(i, DEFAULT_DISCONNECT_TIMEOUT_NS);
1222        if (ret == TIMED_OUT) {
1223            ALOGE("%s: Timed out waiting for client for device %s to disconnect, "
1224                    "current clients:\n%s", __FUNCTION__, i->getKey().string(),
1225                    mActiveClientManager.toString().string());
1226            return -EBUSY;
1227        }
1228        if (ret != NO_ERROR) {
1229            ALOGE("%s: Received error waiting for client for device %s to disconnect: %s (%d), "
1230                    "current clients:\n%s", __FUNCTION__, i->getKey().string(), strerror(-ret),
1231                    ret, mActiveClientManager.toString().string());
1232            return ret;
1233        }
1234    }
1235
1236    evictedClients.clear();
1237
1238    // Once clients have been disconnected, relock
1239    mServiceLock.lock();
1240
1241    // Check again if the device was unplugged or something while we weren't holding mServiceLock
1242    if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) {
1243        return ret;
1244    }
1245
1246    *partial = clientDescriptor;
1247    return NO_ERROR;
1248}
1249
1250Status CameraService::connect(
1251        const sp<ICameraClient>& cameraClient,
1252        int cameraId,
1253        const String16& clientPackageName,
1254        int clientUid,
1255        int clientPid,
1256        /*out*/
1257        sp<ICamera>* device) {
1258
1259    ATRACE_CALL();
1260    Status ret = Status::ok();
1261    String8 id = String8::format("%d", cameraId);
1262    sp<Client> client = nullptr;
1263    ret = connectHelper<ICameraClient,Client>(cameraClient, id,
1264            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, clientUid, clientPid, API_1,
1265            /*legacyMode*/ false, /*shimUpdateOnly*/ false,
1266            /*out*/client);
1267
1268    if(!ret.isOk()) {
1269        logRejected(id, getCallingPid(), String8(clientPackageName),
1270                ret.toString8());
1271        return ret;
1272    }
1273
1274    *device = client;
1275    return ret;
1276}
1277
1278Status CameraService::connectLegacy(
1279        const sp<ICameraClient>& cameraClient,
1280        int cameraId, int halVersion,
1281        const String16& clientPackageName,
1282        int clientUid,
1283        /*out*/
1284        sp<ICamera>* device) {
1285
1286    ATRACE_CALL();
1287    String8 id = String8::format("%d", cameraId);
1288    int apiVersion = mModule->getModuleApiVersion();
1289    if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED &&
1290            apiVersion < CAMERA_MODULE_API_VERSION_2_3) {
1291        /*
1292         * Either the HAL version is unspecified in which case this just creates
1293         * a camera client selected by the latest device version, or
1294         * it's a particular version in which case the HAL must supported
1295         * the open_legacy call
1296         */
1297        String8 msg = String8::format("Camera HAL module version %x too old for connectLegacy!",
1298                apiVersion);
1299        ALOGE("%s: %s",
1300                __FUNCTION__, msg.string());
1301        logRejected(id, getCallingPid(), String8(clientPackageName),
1302                msg);
1303        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string());
1304    }
1305
1306    Status ret = Status::ok();
1307    sp<Client> client = nullptr;
1308    ret = connectHelper<ICameraClient,Client>(cameraClient, id, halVersion,
1309            clientPackageName, clientUid, USE_CALLING_PID, API_1,
1310            /*legacyMode*/ true, /*shimUpdateOnly*/ false,
1311            /*out*/client);
1312
1313    if(!ret.isOk()) {
1314        logRejected(id, getCallingPid(), String8(clientPackageName),
1315                ret.toString8());
1316        return ret;
1317    }
1318
1319    *device = client;
1320    return ret;
1321}
1322
1323Status CameraService::connectDevice(
1324        const sp<hardware::camera2::ICameraDeviceCallbacks>& cameraCb,
1325        int cameraId,
1326        const String16& clientPackageName,
1327        int clientUid,
1328        /*out*/
1329        sp<hardware::camera2::ICameraDeviceUser>* device) {
1330
1331    ATRACE_CALL();
1332    Status ret = Status::ok();
1333    String8 id = String8::format("%d", cameraId);
1334    sp<CameraDeviceClient> client = nullptr;
1335    ret = connectHelper<hardware::camera2::ICameraDeviceCallbacks,CameraDeviceClient>(cameraCb, id,
1336            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName,
1337            clientUid, USE_CALLING_PID, API_2,
1338            /*legacyMode*/ false, /*shimUpdateOnly*/ false,
1339            /*out*/client);
1340
1341    if(!ret.isOk()) {
1342        logRejected(id, getCallingPid(), String8(clientPackageName),
1343                ret.toString8());
1344        return ret;
1345    }
1346
1347    *device = client;
1348    return ret;
1349}
1350
1351Status CameraService::setTorchMode(const String16& cameraId, bool enabled,
1352        const sp<IBinder>& clientBinder) {
1353
1354    ATRACE_CALL();
1355    if (enabled && clientBinder == nullptr) {
1356        ALOGE("%s: torch client binder is NULL", __FUNCTION__);
1357        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT,
1358                "Torch client Binder is null");
1359    }
1360
1361    String8 id = String8(cameraId.string());
1362    int uid = getCallingUid();
1363
1364    // verify id is valid.
1365    auto state = getCameraState(id);
1366    if (state == nullptr) {
1367        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1368        return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
1369                "Camera ID \"%s\" is a not valid camera ID", id.string());
1370    }
1371
1372    int32_t cameraStatus = state->getStatus();
1373    if (cameraStatus != ICameraServiceListener::STATUS_PRESENT &&
1374            cameraStatus != ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1375        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1376        return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
1377                "Camera ID \"%s\" is a not valid camera ID", id.string());
1378    }
1379
1380    {
1381        Mutex::Autolock al(mTorchStatusMutex);
1382        int32_t status;
1383        status_t err = getTorchStatusLocked(id, &status);
1384        if (err != OK) {
1385            if (err == NAME_NOT_FOUND) {
1386                return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
1387                        "Camera \"%s\" does not have a flash unit", id.string());
1388            }
1389            ALOGE("%s: getting current torch status failed for camera %s",
1390                    __FUNCTION__, id.string());
1391            return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
1392                    "Error updating torch status for camera \"%s\": %s (%d)", id.string(),
1393                    strerror(-err), err);
1394        }
1395
1396        if (status == ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE) {
1397            if (cameraStatus == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1398                ALOGE("%s: torch mode of camera %s is not available because "
1399                        "camera is in use", __FUNCTION__, id.string());
1400                return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE,
1401                        "Torch for camera \"%s\" is not available due to an existing camera user",
1402                        id.string());
1403            } else {
1404                ALOGE("%s: torch mode of camera %s is not available due to "
1405                        "insufficient resources", __FUNCTION__, id.string());
1406                return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE,
1407                        "Torch for camera \"%s\" is not available due to insufficient resources",
1408                        id.string());
1409            }
1410        }
1411    }
1412
1413    {
1414        // Update UID map - this is used in the torch status changed callbacks, so must be done
1415        // before setTorchMode
1416        Mutex::Autolock al(mTorchUidMapMutex);
1417        if (mTorchUidMap.find(id) == mTorchUidMap.end()) {
1418            mTorchUidMap[id].first = uid;
1419            mTorchUidMap[id].second = uid;
1420        } else {
1421            // Set the pending UID
1422            mTorchUidMap[id].first = uid;
1423        }
1424    }
1425
1426    status_t err = mFlashlight->setTorchMode(id, enabled);
1427
1428    if (err != OK) {
1429        int32_t errorCode;
1430        String8 msg;
1431        switch (err) {
1432            case -ENOSYS:
1433                msg = String8::format("Camera \"%s\" has no flashlight",
1434                    id.string());
1435                errorCode = ERROR_ILLEGAL_ARGUMENT;
1436                break;
1437            default:
1438                msg = String8::format(
1439                    "Setting torch mode of camera \"%s\" to %d failed: %s (%d)",
1440                    id.string(), enabled, strerror(-err), err);
1441                errorCode = ERROR_INVALID_OPERATION;
1442        }
1443        ALOGE("%s: %s", __FUNCTION__, msg.string());
1444        return STATUS_ERROR(errorCode, msg.string());
1445    }
1446
1447    {
1448        // update the link to client's death
1449        Mutex::Autolock al(mTorchClientMapMutex);
1450        ssize_t index = mTorchClientMap.indexOfKey(id);
1451        if (enabled) {
1452            if (index == NAME_NOT_FOUND) {
1453                mTorchClientMap.add(id, clientBinder);
1454            } else {
1455                mTorchClientMap.valueAt(index)->unlinkToDeath(this);
1456                mTorchClientMap.replaceValueAt(index, clientBinder);
1457            }
1458            clientBinder->linkToDeath(this);
1459        } else if (index != NAME_NOT_FOUND) {
1460            mTorchClientMap.valueAt(index)->unlinkToDeath(this);
1461        }
1462    }
1463
1464    return Status::ok();
1465}
1466
1467Status CameraService::notifySystemEvent(int32_t eventId,
1468        const std::vector<int32_t>& args) {
1469    ATRACE_CALL();
1470
1471    switch(eventId) {
1472        case ICameraService::EVENT_USER_SWITCHED: {
1473            doUserSwitch(/*newUserIds*/ args);
1474            break;
1475        }
1476        case ICameraService::EVENT_NONE:
1477        default: {
1478            ALOGW("%s: Received invalid system event from system_server: %d", __FUNCTION__,
1479                    eventId);
1480            break;
1481        }
1482    }
1483    return Status::ok();
1484}
1485
1486Status CameraService::addListener(const sp<ICameraServiceListener>& listener) {
1487    ATRACE_CALL();
1488
1489    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
1490
1491    if (listener == nullptr) {
1492        ALOGE("%s: Listener must not be null", __FUNCTION__);
1493        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Null listener given to addListener");
1494    }
1495
1496    Mutex::Autolock lock(mServiceLock);
1497
1498    {
1499        Mutex::Autolock lock(mStatusListenerLock);
1500        for (auto& it : mListenerList) {
1501            if (IInterface::asBinder(it) == IInterface::asBinder(listener)) {
1502                ALOGW("%s: Tried to add listener %p which was already subscribed",
1503                      __FUNCTION__, listener.get());
1504                return STATUS_ERROR(ERROR_ALREADY_EXISTS, "Listener already registered");
1505            }
1506        }
1507
1508        mListenerList.push_back(listener);
1509    }
1510
1511
1512    /* Immediately signal current status to this listener only */
1513    {
1514        Mutex::Autolock lock(mCameraStatesLock);
1515        for (auto& i : mCameraStates) {
1516            // TODO: Update binder to use String16 for camera IDs and remove;
1517            int id = cameraIdToInt(i.first);
1518            if (id == -1) continue;
1519
1520            listener->onStatusChanged(i.second->getStatus(), id);
1521        }
1522    }
1523
1524    /* Immediately signal current torch status to this listener only */
1525    {
1526        Mutex::Autolock al(mTorchStatusMutex);
1527        for (size_t i = 0; i < mTorchStatusMap.size(); i++ ) {
1528            String16 id = String16(mTorchStatusMap.keyAt(i).string());
1529            listener->onTorchStatusChanged(mTorchStatusMap.valueAt(i), id);
1530        }
1531    }
1532
1533    return Status::ok();
1534}
1535
1536Status CameraService::removeListener(const sp<ICameraServiceListener>& listener) {
1537    ATRACE_CALL();
1538
1539    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
1540
1541    if (listener == 0) {
1542        ALOGE("%s: Listener must not be null", __FUNCTION__);
1543        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Null listener given to removeListener");
1544    }
1545
1546    Mutex::Autolock lock(mServiceLock);
1547
1548    {
1549        Mutex::Autolock lock(mStatusListenerLock);
1550        for (auto it = mListenerList.begin(); it != mListenerList.end(); it++) {
1551            if (IInterface::asBinder(*it) == IInterface::asBinder(listener)) {
1552                mListenerList.erase(it);
1553                return Status::ok();
1554            }
1555        }
1556    }
1557
1558    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
1559          __FUNCTION__, listener.get());
1560
1561    return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Unregistered listener given to removeListener");
1562}
1563
1564Status CameraService::getLegacyParameters(int cameraId, /*out*/String16* parameters) {
1565
1566    ATRACE_CALL();
1567    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1568
1569    if (parameters == NULL) {
1570        ALOGE("%s: parameters must not be null", __FUNCTION__);
1571        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Parameters must not be null");
1572    }
1573
1574    Status ret = Status::ok();
1575
1576    CameraParameters shimParams;
1577    if (!(ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)).isOk()) {
1578        // Error logged by caller
1579        return ret;
1580    }
1581
1582    String8 shimParamsString8 = shimParams.flatten();
1583    String16 shimParamsString16 = String16(shimParamsString8);
1584
1585    *parameters = shimParamsString16;
1586
1587    return ret;
1588}
1589
1590Status CameraService::supportsCameraApi(int cameraId, int apiVersion, bool *isSupported) {
1591    ATRACE_CALL();
1592
1593    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1594
1595    switch (apiVersion) {
1596        case API_VERSION_1:
1597        case API_VERSION_2:
1598            break;
1599        default:
1600            String8 msg = String8::format("Unknown API version %d", apiVersion);
1601            ALOGE("%s: %s", __FUNCTION__, msg.string());
1602            return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string());
1603    }
1604
1605    int facing = -1;
1606    int deviceVersion = getDeviceVersion(cameraId, &facing);
1607
1608    switch(deviceVersion) {
1609        case CAMERA_DEVICE_API_VERSION_1_0:
1610        case CAMERA_DEVICE_API_VERSION_3_0:
1611        case CAMERA_DEVICE_API_VERSION_3_1:
1612            if (apiVersion == API_VERSION_2) {
1613                ALOGV("%s: Camera id %d uses HAL version %d <3.2, doesn't support api2 without shim",
1614                        __FUNCTION__, cameraId, deviceVersion);
1615                *isSupported = false;
1616            } else { // if (apiVersion == API_VERSION_1) {
1617                ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported",
1618                        __FUNCTION__, cameraId);
1619                *isSupported = true;
1620            }
1621            break;
1622        case CAMERA_DEVICE_API_VERSION_3_2:
1623        case CAMERA_DEVICE_API_VERSION_3_3:
1624            ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly",
1625                    __FUNCTION__, cameraId);
1626            *isSupported = true;
1627            break;
1628        case -1: {
1629            String8 msg = String8::format("Unknown camera ID %d", cameraId);
1630            ALOGE("%s: %s", __FUNCTION__, msg.string());
1631            return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string());
1632        }
1633        default: {
1634            String8 msg = String8::format("Unknown device version %d for device %d",
1635                    deviceVersion, cameraId);
1636            ALOGE("%s: %s", __FUNCTION__, msg.string());
1637            return STATUS_ERROR(ERROR_INVALID_OPERATION, msg.string());
1638        }
1639    }
1640
1641    return Status::ok();
1642}
1643
1644void CameraService::removeByClient(const BasicClient* client) {
1645    Mutex::Autolock lock(mServiceLock);
1646    for (auto& i : mActiveClientManager.getAll()) {
1647        auto clientSp = i->getValue();
1648        if (clientSp.get() == client) {
1649            mActiveClientManager.remove(i);
1650        }
1651    }
1652}
1653
1654bool CameraService::evictClientIdByRemote(const wp<IBinder>& remote) {
1655    const int callingPid = getCallingPid();
1656    const int servicePid = getpid();
1657    bool ret = false;
1658    {
1659        // Acquire mServiceLock and prevent other clients from connecting
1660        std::unique_ptr<AutoConditionLock> lock =
1661                AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1662
1663
1664        std::vector<sp<BasicClient>> evicted;
1665        for (auto& i : mActiveClientManager.getAll()) {
1666            auto clientSp = i->getValue();
1667            if (clientSp.get() == nullptr) {
1668                ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1669                mActiveClientManager.remove(i);
1670                continue;
1671            }
1672            if (remote == clientSp->getRemote() && (callingPid == servicePid ||
1673                    callingPid == clientSp->getClientPid())) {
1674                mActiveClientManager.remove(i);
1675                evicted.push_back(clientSp);
1676
1677                // Notify the client of disconnection
1678                clientSp->notifyError(
1679                        hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
1680                        CaptureResultExtras());
1681            }
1682        }
1683
1684        // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1685        // other clients from connecting in mServiceLockWrapper if held
1686        mServiceLock.unlock();
1687
1688        // Do not clear caller identity, remote caller should be client proccess
1689
1690        for (auto& i : evicted) {
1691            if (i.get() != nullptr) {
1692                i->disconnect();
1693                ret = true;
1694            }
1695        }
1696
1697        // Reacquire mServiceLock
1698        mServiceLock.lock();
1699
1700    } // lock is destroyed, allow further connect calls
1701
1702    return ret;
1703}
1704
1705
1706/**
1707 * Check camera capabilities, such as support for basic color operation
1708 * Also check that the device HAL version is still in support
1709 */
1710int CameraService::checkCameraCapabilities(int id, camera_info info, int *latestStrangeCameraId) {
1711    // device_version undefined in CAMERA_MODULE_API_VERSION_1_0,
1712    // All CAMERA_MODULE_API_VERSION_1_0 devices are backward-compatible
1713    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) {
1714        // Verify the device version is in the supported range
1715        switch (info.device_version) {
1716            case CAMERA_DEVICE_API_VERSION_1_0:
1717            case CAMERA_DEVICE_API_VERSION_3_0:
1718            case CAMERA_DEVICE_API_VERSION_3_1:
1719            case CAMERA_DEVICE_API_VERSION_3_2:
1720            case CAMERA_DEVICE_API_VERSION_3_3:
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        // change logging level
2609        int n = args.size();
2610        for (int i = 0; i + 1 < n; i++) {
2611            String16 verboseOption("-v");
2612            if (args[i] == verboseOption) {
2613                String8 levelStr(args[i+1]);
2614                int level = atoi(levelStr.string());
2615                result = String8::format("\nSetting log level to %d.\n", level);
2616                setLogLevel(level);
2617                write(fd, result.string(), result.size());
2618            }
2619        }
2620    }
2621    return NO_ERROR;
2622}
2623
2624void CameraService::dumpEventLog(int fd) {
2625    String8 result = String8("\nPrior client events (most recent at top):\n");
2626
2627    Mutex::Autolock l(mLogLock);
2628    for (const auto& msg : mEventLog) {
2629        result.appendFormat("  %s\n", msg.string());
2630    }
2631
2632    if (mEventLog.size() == DEFAULT_EVENT_LOG_LENGTH) {
2633        result.append("  ...\n");
2634    } else if (mEventLog.size() == 0) {
2635        result.append("  [no events yet]\n");
2636    }
2637    result.append("\n");
2638
2639    write(fd, result.string(), result.size());
2640}
2641
2642void CameraService::handleTorchClientBinderDied(const wp<IBinder> &who) {
2643    Mutex::Autolock al(mTorchClientMapMutex);
2644    for (size_t i = 0; i < mTorchClientMap.size(); i++) {
2645        if (mTorchClientMap[i] == who) {
2646            // turn off the torch mode that was turned on by dead client
2647            String8 cameraId = mTorchClientMap.keyAt(i);
2648            status_t res = mFlashlight->setTorchMode(cameraId, false);
2649            if (res) {
2650                ALOGE("%s: torch client died but couldn't turn off torch: "
2651                    "%s (%d)", __FUNCTION__, strerror(-res), res);
2652                return;
2653            }
2654            mTorchClientMap.removeItemsAt(i);
2655            break;
2656        }
2657    }
2658}
2659
2660/*virtual*/void CameraService::binderDied(const wp<IBinder> &who) {
2661
2662    /**
2663      * While tempting to promote the wp<IBinder> into a sp, it's actually not supported by the
2664      * binder driver
2665      */
2666
2667    logClientDied(getCallingPid(), String8("Binder died unexpectedly"));
2668
2669    // check torch client
2670    handleTorchClientBinderDied(who);
2671
2672    // check camera device client
2673    if(!evictClientIdByRemote(who)) {
2674        ALOGV("%s: Java client's binder death already cleaned up (normal case)", __FUNCTION__);
2675        return;
2676    }
2677
2678    ALOGE("%s: Java client's binder died, removing it from the list of active clients",
2679            __FUNCTION__);
2680}
2681
2682void CameraService::updateStatus(int32_t status, const String8& cameraId) {
2683    updateStatus(status, cameraId, {});
2684}
2685
2686void CameraService::updateStatus(int32_t status, const String8& cameraId,
2687        std::initializer_list<int32_t> rejectSourceStates) {
2688    // Do not lock mServiceLock here or can get into a deadlock from
2689    // connect() -> disconnect -> updateStatus
2690
2691    auto state = getCameraState(cameraId);
2692
2693    if (state == nullptr) {
2694        ALOGW("%s: Could not update the status for %s, no such device exists", __FUNCTION__,
2695                cameraId.string());
2696        return;
2697    }
2698
2699    // Update the status for this camera state, then send the onStatusChangedCallbacks to each
2700    // of the listeners with both the mStatusStatus and mStatusListenerLock held
2701    state->updateStatus(status, cameraId, rejectSourceStates, [this]
2702            (const String8& cameraId, int32_t status) {
2703
2704            if (status != ICameraServiceListener::STATUS_ENUMERATING) {
2705                // Update torch status if it has a flash unit.
2706                Mutex::Autolock al(mTorchStatusMutex);
2707                int32_t torchStatus;
2708                if (getTorchStatusLocked(cameraId, &torchStatus) !=
2709                        NAME_NOT_FOUND) {
2710                    int32_t newTorchStatus =
2711                            status == ICameraServiceListener::STATUS_PRESENT ?
2712                            ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF :
2713                            ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE;
2714                    if (torchStatus != newTorchStatus) {
2715                        onTorchStatusChangedLocked(cameraId, newTorchStatus);
2716                    }
2717                }
2718            }
2719
2720            Mutex::Autolock lock(mStatusListenerLock);
2721
2722            for (auto& listener : mListenerList) {
2723                // TODO: Refactor status listeners to use strings for Camera IDs and remove this.
2724                int id = cameraIdToInt(cameraId);
2725                if (id != -1) listener->onStatusChanged(status, id);
2726            }
2727        });
2728}
2729
2730void CameraService::updateProxyDeviceState(ICameraServiceProxy::CameraState newState,
2731        const String8& cameraId) {
2732    sp<ICameraServiceProxy> proxyBinder = getCameraServiceProxy();
2733    if (proxyBinder == nullptr) return;
2734    String16 id(cameraId);
2735    proxyBinder->notifyCameraState(id, newState);
2736}
2737
2738status_t CameraService::getTorchStatusLocked(
2739        const String8& cameraId,
2740        int32_t *status) const {
2741    if (!status) {
2742        return BAD_VALUE;
2743    }
2744    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2745    if (index == NAME_NOT_FOUND) {
2746        // invalid camera ID or the camera doesn't have a flash unit
2747        return NAME_NOT_FOUND;
2748    }
2749
2750    *status = mTorchStatusMap.valueAt(index);
2751    return OK;
2752}
2753
2754status_t CameraService::setTorchStatusLocked(const String8& cameraId,
2755        int32_t status) {
2756    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2757    if (index == NAME_NOT_FOUND) {
2758        return BAD_VALUE;
2759    }
2760    int32_t& item =
2761            mTorchStatusMap.editValueAt(index);
2762    item = status;
2763
2764    return OK;
2765}
2766
2767}; // namespace android
2768