CameraService.cpp revision 0492686c4703b3ddbff52d047ef226b973a3388a 
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
664    *desc = *(VendorTagDescriptor::getGlobalVendorTagDescriptor().get());
665    return Status::ok();
666}
667
668int CameraService::getDeviceVersion(int cameraId, int* facing) {
669    ATRACE_CALL();
670    struct camera_info info;
671    if (mModule->getCameraInfo(cameraId, &info) != OK) {
672        return -1;
673    }
674
675    int deviceVersion;
676    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) {
677        deviceVersion = info.device_version;
678    } else {
679        deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
680    }
681
682    if (facing) {
683        *facing = info.facing;
684    }
685
686    return deviceVersion;
687}
688
689Status CameraService::filterGetInfoErrorCode(status_t err) {
690    switch(err) {
691        case NO_ERROR:
692            return Status::ok();
693        case -EINVAL:
694            return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT,
695                    "CameraId is not valid for HAL module");
696        case -ENODEV:
697            return STATUS_ERROR(ERROR_DISCONNECTED,
698                    "Camera device not available");
699        default:
700            return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
701                    "Camera HAL encountered error %d: %s",
702                    err, strerror(-err));
703    }
704}
705
706bool CameraService::setUpVendorTags() {
707    ATRACE_CALL();
708    vendor_tag_ops_t vOps = vendor_tag_ops_t();
709
710    // Check if vendor operations have been implemented
711    if (!mModule->isVendorTagDefined()) {
712        ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__);
713        return false;
714    }
715
716    mModule->getVendorTagOps(&vOps);
717
718    // Ensure all vendor operations are present
719    if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL ||
720            vOps.get_section_name == NULL || vOps.get_tag_name == NULL ||
721            vOps.get_tag_type == NULL) {
722        ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions."
723               , __FUNCTION__);
724        return false;
725    }
726
727    // Read all vendor tag definitions into a descriptor
728    sp<VendorTagDescriptor> desc;
729    status_t res;
730    if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc))
731            != OK) {
732        ALOGE("%s: Could not generate descriptor from vendor tag operations,"
733              "received error %s (%d). Camera clients will not be able to use"
734              "vendor tags", __FUNCTION__, strerror(res), res);
735        return false;
736    }
737
738    // Set the global descriptor to use with camera metadata
739    VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc);
740    return true;
741}
742
743Status CameraService::makeClient(const sp<CameraService>& cameraService,
744        const sp<IInterface>& cameraCb, const String16& packageName, int cameraId,
745        int facing, int clientPid, uid_t clientUid, int servicePid, bool legacyMode,
746        int halVersion, int deviceVersion, apiLevel effectiveApiLevel,
747        /*out*/sp<BasicClient>* client) {
748
749    if (halVersion < 0 || halVersion == deviceVersion) {
750        // Default path: HAL version is unspecified by caller, create CameraClient
751        // based on device version reported by the HAL.
752        switch(deviceVersion) {
753          case CAMERA_DEVICE_API_VERSION_1_0:
754            if (effectiveApiLevel == API_1) {  // Camera1 API route
755                sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
756                *client = new CameraClient(cameraService, tmp, packageName, cameraId, facing,
757                        clientPid, clientUid, getpid(), legacyMode);
758            } else { // Camera2 API route
759                ALOGW("Camera using old HAL version: %d", deviceVersion);
760                return STATUS_ERROR_FMT(ERROR_DEPRECATED_HAL,
761                        "Camera device \"%d\" HAL version %d does not support camera2 API",
762                        cameraId, deviceVersion);
763            }
764            break;
765          case CAMERA_DEVICE_API_VERSION_3_0:
766          case CAMERA_DEVICE_API_VERSION_3_1:
767          case CAMERA_DEVICE_API_VERSION_3_2:
768          case CAMERA_DEVICE_API_VERSION_3_3:
769            if (effectiveApiLevel == API_1) { // Camera1 API route
770                sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
771                *client = new Camera2Client(cameraService, tmp, packageName, cameraId, facing,
772                        clientPid, clientUid, servicePid, legacyMode);
773            } else { // Camera2 API route
774                sp<hardware::camera2::ICameraDeviceCallbacks> tmp =
775                        static_cast<hardware::camera2::ICameraDeviceCallbacks*>(cameraCb.get());
776                *client = new CameraDeviceClient(cameraService, tmp, packageName, cameraId,
777                        facing, clientPid, clientUid, servicePid);
778            }
779            break;
780          default:
781            // Should not be reachable
782            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
783            return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
784                    "Camera device \"%d\" has unknown HAL version %d",
785                    cameraId, deviceVersion);
786        }
787    } else {
788        // A particular HAL version is requested by caller. Create CameraClient
789        // based on the requested HAL version.
790        if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 &&
791            halVersion == CAMERA_DEVICE_API_VERSION_1_0) {
792            // Only support higher HAL version device opened as HAL1.0 device.
793            sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
794            *client = new CameraClient(cameraService, tmp, packageName, cameraId, facing,
795                    clientPid, clientUid, servicePid, legacyMode);
796        } else {
797            // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet.
798            ALOGE("Invalid camera HAL version %x: HAL %x device can only be"
799                    " opened as HAL %x device", halVersion, deviceVersion,
800                    CAMERA_DEVICE_API_VERSION_1_0);
801            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
802                    "Camera device \"%d\" (HAL version %d) cannot be opened as HAL version %d",
803                    cameraId, deviceVersion, halVersion);
804        }
805    }
806    return Status::ok();
807}
808
809String8 CameraService::toString(std::set<userid_t> intSet) {
810    String8 s("");
811    bool first = true;
812    for (userid_t i : intSet) {
813        if (first) {
814            s.appendFormat("%d", i);
815            first = false;
816        } else {
817            s.appendFormat(", %d", i);
818        }
819    }
820    return s;
821}
822
823Status CameraService::initializeShimMetadata(int cameraId) {
824    int uid = getCallingUid();
825
826    String16 internalPackageName("cameraserver");
827    String8 id = String8::format("%d", cameraId);
828    Status ret = Status::ok();
829    sp<Client> tmp = nullptr;
830    if (!(ret = connectHelper<ICameraClient,Client>(
831            sp<ICameraClient>{nullptr}, id, static_cast<int>(CAMERA_HAL_API_VERSION_UNSPECIFIED),
832            internalPackageName, uid, USE_CALLING_PID,
833            API_1, /*legacyMode*/ false, /*shimUpdateOnly*/ true,
834            /*out*/ tmp)
835            ).isOk()) {
836        ALOGE("%s: Error initializing shim metadata: %s", __FUNCTION__, ret.toString8().string());
837    }
838    return ret;
839}
840
841Status CameraService::getLegacyParametersLazy(int cameraId,
842        /*out*/
843        CameraParameters* parameters) {
844
845    ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId);
846
847    Status ret = Status::ok();
848
849    if (parameters == NULL) {
850        ALOGE("%s: parameters must not be null", __FUNCTION__);
851        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Parameters must not be null");
852    }
853
854    String8 id = String8::format("%d", cameraId);
855
856    // Check if we already have parameters
857    {
858        // Scope for service lock
859        Mutex::Autolock lock(mServiceLock);
860        auto cameraState = getCameraState(id);
861        if (cameraState == nullptr) {
862            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
863            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
864                    "Invalid camera ID: %s", id.string());
865        }
866        CameraParameters p = cameraState->getShimParams();
867        if (!p.isEmpty()) {
868            *parameters = p;
869            return ret;
870        }
871    }
872
873    int64_t token = IPCThreadState::self()->clearCallingIdentity();
874    ret = initializeShimMetadata(cameraId);
875    IPCThreadState::self()->restoreCallingIdentity(token);
876    if (!ret.isOk()) {
877        // Error already logged by callee
878        return ret;
879    }
880
881    // Check for parameters again
882    {
883        // Scope for service lock
884        Mutex::Autolock lock(mServiceLock);
885        auto cameraState = getCameraState(id);
886        if (cameraState == nullptr) {
887            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
888            return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
889                    "Invalid camera ID: %s", id.string());
890        }
891        CameraParameters p = cameraState->getShimParams();
892        if (!p.isEmpty()) {
893            *parameters = p;
894            return ret;
895        }
896    }
897
898    ALOGE("%s: Parameters were not initialized, or were empty.  Device may not be present.",
899            __FUNCTION__);
900    return STATUS_ERROR(ERROR_INVALID_OPERATION, "Unable to initialize legacy parameters");
901}
902
903// Can camera service trust the caller based on the calling UID?
904static bool isTrustedCallingUid(uid_t uid) {
905    switch (uid) {
906        case AID_MEDIA:         // mediaserver
907        case AID_CAMERASERVER: // cameraserver
908            return true;
909        default:
910            return false;
911    }
912}
913
914Status CameraService::validateConnectLocked(const String8& cameraId,
915        const String8& clientName8, /*inout*/int& clientUid, /*inout*/int& clientPid) const {
916
917#if !defined(__BRILLO__)
918    Status allowed = validateClientPermissionsLocked(cameraId, clientName8, clientUid, clientPid);
919    if (!allowed.isOk()) {
920        return allowed;
921    }
922#endif  // defined(__BRILLO__)
923
924    int callingPid = getCallingPid();
925
926    if (!mModule) {
927        ALOGE("CameraService::connect X (PID %d) rejected (camera HAL module not loaded)",
928                callingPid);
929        return STATUS_ERROR_FMT(ERROR_DISCONNECTED,
930                "No camera HAL module available to open camera device \"%s\"", cameraId.string());
931    }
932
933    if (getCameraState(cameraId) == nullptr) {
934        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
935                cameraId.string());
936        return STATUS_ERROR_FMT(ERROR_DISCONNECTED,
937                "No camera device with ID \"%s\" available", cameraId.string());
938    }
939
940    status_t err = checkIfDeviceIsUsable(cameraId);
941    if (err != NO_ERROR) {
942        switch(err) {
943            case -ENODEV:
944            case -EBUSY:
945                return STATUS_ERROR_FMT(ERROR_DISCONNECTED,
946                        "No camera device with ID \"%s\" currently available", cameraId.string());
947            default:
948                return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
949                        "Unknown error connecting to ID \"%s\"", cameraId.string());
950        }
951    }
952    return Status::ok();
953}
954
955Status CameraService::validateClientPermissionsLocked(const String8& cameraId,
956        const String8& clientName8, int& clientUid, int& clientPid) const {
957    int callingPid = getCallingPid();
958    int callingUid = getCallingUid();
959
960    // Check if we can trust clientUid
961    if (clientUid == USE_CALLING_UID) {
962        clientUid = callingUid;
963    } else if (!isTrustedCallingUid(callingUid)) {
964        ALOGE("CameraService::connect X (calling PID %d, calling UID %d) rejected "
965                "(don't trust clientUid %d)", callingPid, callingUid, clientUid);
966        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
967                "Untrusted caller (calling PID %d, UID %d) trying to "
968                "forward camera access to camera %s for client %s (PID %d, UID %d)",
969                callingPid, callingUid, cameraId.string(),
970                clientName8.string(), clientUid, clientPid);
971    }
972
973    // Check if we can trust clientPid
974    if (clientPid == USE_CALLING_PID) {
975        clientPid = callingPid;
976    } else if (!isTrustedCallingUid(callingUid)) {
977        ALOGE("CameraService::connect X (calling PID %d, calling UID %d) rejected "
978                "(don't trust clientPid %d)", callingPid, callingUid, clientPid);
979        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
980                "Untrusted caller (calling PID %d, UID %d) trying to "
981                "forward camera access to camera %s for client %s (PID %d, UID %d)",
982                callingPid, callingUid, cameraId.string(),
983                clientName8.string(), clientUid, clientPid);
984    }
985
986    // If it's not calling from cameraserver, check the permission.
987    if (callingPid != getpid() &&
988            !checkPermission(String16("android.permission.CAMERA"), clientPid, clientUid)) {
989        ALOGE("Permission Denial: can't use the camera pid=%d, uid=%d", clientPid, clientUid);
990        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
991                "Caller \"%s\" (PID %d, UID %d) cannot open camera \"%s\" without camera permission",
992                clientName8.string(), clientUid, clientPid, cameraId.string());
993    }
994
995    userid_t clientUserId = multiuser_get_user_id(clientUid);
996
997    // Only allow clients who are being used by the current foreground device user, unless calling
998    // from our own process.
999    if (callingPid != getpid() && (mAllowedUsers.find(clientUserId) == mAllowedUsers.end())) {
1000        ALOGE("CameraService::connect X (PID %d) rejected (cannot connect from "
1001                "device user %d, currently allowed device users: %s)", callingPid, clientUserId,
1002                toString(mAllowedUsers).string());
1003        return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED,
1004                "Callers from device user %d are not currently allowed to connect to camera \"%s\"",
1005                clientUserId, cameraId.string());
1006    }
1007
1008    return Status::ok();
1009}
1010
1011status_t CameraService::checkIfDeviceIsUsable(const String8& cameraId) const {
1012    auto cameraState = getCameraState(cameraId);
1013    int callingPid = getCallingPid();
1014    if (cameraState == nullptr) {
1015        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
1016                cameraId.string());
1017        return -ENODEV;
1018    }
1019
1020    int32_t currentStatus = cameraState->getStatus();
1021    if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
1022        ALOGE("CameraService::connect X (PID %d) rejected (camera %s is not connected)",
1023                callingPid, cameraId.string());
1024        return -ENODEV;
1025    } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
1026        ALOGE("CameraService::connect X (PID %d) rejected, (camera %s is initializing)",
1027                callingPid, cameraId.string());
1028        return -EBUSY;
1029    }
1030
1031    return NO_ERROR;
1032}
1033
1034void CameraService::finishConnectLocked(const sp<BasicClient>& client,
1035        const CameraService::DescriptorPtr& desc) {
1036
1037    // Make a descriptor for the incoming client
1038    auto clientDescriptor = CameraService::CameraClientManager::makeClientDescriptor(client, desc);
1039    auto evicted = mActiveClientManager.addAndEvict(clientDescriptor);
1040
1041    logConnected(desc->getKey(), static_cast<int>(desc->getOwnerId()),
1042            String8(client->getPackageName()));
1043
1044    if (evicted.size() > 0) {
1045        // This should never happen - clients should already have been removed in disconnect
1046        for (auto& i : evicted) {
1047            ALOGE("%s: Invalid state: Client for camera %s was not removed in disconnect",
1048                    __FUNCTION__, i->getKey().string());
1049        }
1050
1051        LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, clients not evicted properly",
1052                __FUNCTION__);
1053    }
1054
1055    // And register a death notification for the client callback. Do
1056    // this last to avoid Binder policy where a nested Binder
1057    // transaction might be pre-empted to service the client death
1058    // notification if the client process dies before linkToDeath is
1059    // invoked.
1060    sp<IBinder> remoteCallback = client->getRemote();
1061    if (remoteCallback != nullptr) {
1062        remoteCallback->linkToDeath(this);
1063    }
1064}
1065
1066status_t CameraService::handleEvictionsLocked(const String8& cameraId, int clientPid,
1067        apiLevel effectiveApiLevel, const sp<IBinder>& remoteCallback, const String8& packageName,
1068        /*out*/
1069        sp<BasicClient>* client,
1070        std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>* partial) {
1071    ATRACE_CALL();
1072    status_t ret = NO_ERROR;
1073    std::vector<DescriptorPtr> evictedClients;
1074    DescriptorPtr clientDescriptor;
1075    {
1076        if (effectiveApiLevel == API_1) {
1077            // If we are using API1, any existing client for this camera ID with the same remote
1078            // should be returned rather than evicted to allow MediaRecorder to work properly.
1079
1080            auto current = mActiveClientManager.get(cameraId);
1081            if (current != nullptr) {
1082                auto clientSp = current->getValue();
1083                if (clientSp.get() != nullptr) { // should never be needed
1084                    if (!clientSp->canCastToApiClient(effectiveApiLevel)) {
1085                        ALOGW("CameraService connect called from same client, but with a different"
1086                                " API level, evicting prior client...");
1087                    } else if (clientSp->getRemote() == remoteCallback) {
1088                        ALOGI("CameraService::connect X (PID %d) (second call from same"
1089                                " app binder, returning the same client)", clientPid);
1090                        *client = clientSp;
1091                        return NO_ERROR;
1092                    }
1093                }
1094            }
1095        }
1096
1097        // Get current active client PIDs
1098        std::vector<int> ownerPids(mActiveClientManager.getAllOwners());
1099        ownerPids.push_back(clientPid);
1100
1101        // Use the value +PROCESS_STATE_NONEXISTENT, to avoid taking
1102        // address of PROCESS_STATE_NONEXISTENT as a reference argument
1103        // for the vector constructor. PROCESS_STATE_NONEXISTENT does
1104        // not have an out-of-class definition.
1105        std::vector<int> priorities(ownerPids.size(), +PROCESS_STATE_NONEXISTENT);
1106
1107        // Get priorites of all active PIDs
1108        ProcessInfoService::getProcessStatesFromPids(ownerPids.size(), &ownerPids[0],
1109                /*out*/&priorities[0]);
1110
1111        // Update all active clients' priorities
1112        std::map<int,int> pidToPriorityMap;
1113        for (size_t i = 0; i < ownerPids.size() - 1; i++) {
1114            pidToPriorityMap.emplace(ownerPids[i], getCameraPriorityFromProcState(priorities[i]));
1115        }
1116        mActiveClientManager.updatePriorities(pidToPriorityMap);
1117
1118        // Get state for the given cameraId
1119        auto state = getCameraState(cameraId);
1120        if (state == nullptr) {
1121            ALOGE("CameraService::connect X (PID %d) rejected (no camera device with ID %s)",
1122                clientPid, cameraId.string());
1123            // Should never get here because validateConnectLocked should have errored out
1124            return BAD_VALUE;
1125        }
1126
1127        // Make descriptor for incoming client
1128        clientDescriptor = CameraClientManager::makeClientDescriptor(cameraId,
1129                sp<BasicClient>{nullptr}, static_cast<int32_t>(state->getCost()),
1130                state->getConflicting(),
1131                getCameraPriorityFromProcState(priorities[priorities.size() - 1]), clientPid);
1132
1133        // Find clients that would be evicted
1134        auto evicted = mActiveClientManager.wouldEvict(clientDescriptor);
1135
1136        // If the incoming client was 'evicted,' higher priority clients have the camera in the
1137        // background, so we cannot do evictions
1138        if (std::find(evicted.begin(), evicted.end(), clientDescriptor) != evicted.end()) {
1139            ALOGE("CameraService::connect X (PID %d) rejected (existing client(s) with higher"
1140                    " priority).", clientPid);
1141
1142            sp<BasicClient> clientSp = clientDescriptor->getValue();
1143            String8 curTime = getFormattedCurrentTime();
1144            auto incompatibleClients =
1145                    mActiveClientManager.getIncompatibleClients(clientDescriptor);
1146
1147            String8 msg = String8::format("%s : DENIED connect device %s client for package %s "
1148                    "(PID %d, priority %d) due to eviction policy", curTime.string(),
1149                    cameraId.string(), packageName.string(), clientPid,
1150                    getCameraPriorityFromProcState(priorities[priorities.size() - 1]));
1151
1152            for (auto& i : incompatibleClients) {
1153                msg.appendFormat("\n   - Blocked by existing device %s client for package %s"
1154                        "(PID %" PRId32 ", priority %" PRId32 ")", i->getKey().string(),
1155                        String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(),
1156                        i->getPriority());
1157                ALOGE("   Conflicts with: Device %s, client package %s (PID %"
1158                        PRId32 ", priority %" PRId32 ")", i->getKey().string(),
1159                        String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(),
1160                        i->getPriority());
1161            }
1162
1163            // Log the client's attempt
1164            Mutex::Autolock l(mLogLock);
1165            mEventLog.add(msg);
1166
1167            return -EBUSY;
1168        }
1169
1170        for (auto& i : evicted) {
1171            sp<BasicClient> clientSp = i->getValue();
1172            if (clientSp.get() == nullptr) {
1173                ALOGE("%s: Invalid state: Null client in active client list.", __FUNCTION__);
1174
1175                // TODO: Remove this
1176                LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, null client in active list",
1177                        __FUNCTION__);
1178                mActiveClientManager.remove(i);
1179                continue;
1180            }
1181
1182            ALOGE("CameraService::connect evicting conflicting client for camera ID %s",
1183                    i->getKey().string());
1184            evictedClients.push_back(i);
1185
1186            // Log the clients evicted
1187            logEvent(String8::format("EVICT device %s client held by package %s (PID"
1188                    " %" PRId32 ", priority %" PRId32 ")\n   - Evicted by device %s client for"
1189                    " package %s (PID %d, priority %" PRId32 ")",
1190                    i->getKey().string(), String8{clientSp->getPackageName()}.string(),
1191                    i->getOwnerId(), i->getPriority(), cameraId.string(),
1192                    packageName.string(), clientPid,
1193                    getCameraPriorityFromProcState(priorities[priorities.size() - 1])));
1194
1195            // Notify the client of disconnection
1196            clientSp->notifyError(hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
1197                    CaptureResultExtras());
1198        }
1199    }
1200
1201    // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1202    // other clients from connecting in mServiceLockWrapper if held
1203    mServiceLock.unlock();
1204
1205    // Clear caller identity temporarily so client disconnect PID checks work correctly
1206    int64_t token = IPCThreadState::self()->clearCallingIdentity();
1207
1208    // Destroy evicted clients
1209    for (auto& i : evictedClients) {
1210        // Disconnect is blocking, and should only have returned when HAL has cleaned up
1211        i->getValue()->disconnect(); // Clients will remove themselves from the active client list
1212    }
1213
1214    IPCThreadState::self()->restoreCallingIdentity(token);
1215
1216    for (const auto& i : evictedClients) {
1217        ALOGV("%s: Waiting for disconnect to complete for client for device %s (PID %" PRId32 ")",
1218                __FUNCTION__, i->getKey().string(), i->getOwnerId());
1219        ret = mActiveClientManager.waitUntilRemoved(i, DEFAULT_DISCONNECT_TIMEOUT_NS);
1220        if (ret == TIMED_OUT) {
1221            ALOGE("%s: Timed out waiting for client for device %s to disconnect, "
1222                    "current clients:\n%s", __FUNCTION__, i->getKey().string(),
1223                    mActiveClientManager.toString().string());
1224            return -EBUSY;
1225        }
1226        if (ret != NO_ERROR) {
1227            ALOGE("%s: Received error waiting for client for device %s to disconnect: %s (%d), "
1228                    "current clients:\n%s", __FUNCTION__, i->getKey().string(), strerror(-ret),
1229                    ret, mActiveClientManager.toString().string());
1230            return ret;
1231        }
1232    }
1233
1234    evictedClients.clear();
1235
1236    // Once clients have been disconnected, relock
1237    mServiceLock.lock();
1238
1239    // Check again if the device was unplugged or something while we weren't holding mServiceLock
1240    if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) {
1241        return ret;
1242    }
1243
1244    *partial = clientDescriptor;
1245    return NO_ERROR;
1246}
1247
1248Status CameraService::connect(
1249        const sp<ICameraClient>& cameraClient,
1250        int cameraId,
1251        const String16& clientPackageName,
1252        int clientUid,
1253        int clientPid,
1254        /*out*/
1255        sp<ICamera>* device) {
1256
1257    ATRACE_CALL();
1258    Status ret = Status::ok();
1259    String8 id = String8::format("%d", cameraId);
1260    sp<Client> client = nullptr;
1261    ret = connectHelper<ICameraClient,Client>(cameraClient, id,
1262            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, clientUid, clientPid, API_1,
1263            /*legacyMode*/ false, /*shimUpdateOnly*/ false,
1264            /*out*/client);
1265
1266    if(!ret.isOk()) {
1267        logRejected(id, getCallingPid(), String8(clientPackageName),
1268                ret.toString8());
1269        return ret;
1270    }
1271
1272    *device = client;
1273    return ret;
1274}
1275
1276Status CameraService::connectLegacy(
1277        const sp<ICameraClient>& cameraClient,
1278        int cameraId, int halVersion,
1279        const String16& clientPackageName,
1280        int clientUid,
1281        /*out*/
1282        sp<ICamera>* device) {
1283
1284    ATRACE_CALL();
1285    String8 id = String8::format("%d", cameraId);
1286    int apiVersion = mModule->getModuleApiVersion();
1287    if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED &&
1288            apiVersion < CAMERA_MODULE_API_VERSION_2_3) {
1289        /*
1290         * Either the HAL version is unspecified in which case this just creates
1291         * a camera client selected by the latest device version, or
1292         * it's a particular version in which case the HAL must supported
1293         * the open_legacy call
1294         */
1295        String8 msg = String8::format("Camera HAL module version %x too old for connectLegacy!",
1296                apiVersion);
1297        ALOGE("%s: %s",
1298                __FUNCTION__, msg.string());
1299        logRejected(id, getCallingPid(), String8(clientPackageName),
1300                msg);
1301        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string());
1302    }
1303
1304    Status ret = Status::ok();
1305    sp<Client> client = nullptr;
1306    ret = connectHelper<ICameraClient,Client>(cameraClient, id, halVersion,
1307            clientPackageName, clientUid, USE_CALLING_PID, API_1,
1308            /*legacyMode*/ true, /*shimUpdateOnly*/ false,
1309            /*out*/client);
1310
1311    if(!ret.isOk()) {
1312        logRejected(id, getCallingPid(), String8(clientPackageName),
1313                ret.toString8());
1314        return ret;
1315    }
1316
1317    *device = client;
1318    return ret;
1319}
1320
1321Status CameraService::connectDevice(
1322        const sp<hardware::camera2::ICameraDeviceCallbacks>& cameraCb,
1323        int cameraId,
1324        const String16& clientPackageName,
1325        int clientUid,
1326        /*out*/
1327        sp<hardware::camera2::ICameraDeviceUser>* device) {
1328
1329    ATRACE_CALL();
1330    Status ret = Status::ok();
1331    String8 id = String8::format("%d", cameraId);
1332    sp<CameraDeviceClient> client = nullptr;
1333    ret = connectHelper<hardware::camera2::ICameraDeviceCallbacks,CameraDeviceClient>(cameraCb, id,
1334            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName,
1335            clientUid, USE_CALLING_PID, API_2,
1336            /*legacyMode*/ false, /*shimUpdateOnly*/ false,
1337            /*out*/client);
1338
1339    if(!ret.isOk()) {
1340        logRejected(id, getCallingPid(), String8(clientPackageName),
1341                ret.toString8());
1342        return ret;
1343    }
1344
1345    *device = client;
1346    return ret;
1347}
1348
1349Status CameraService::setTorchMode(const String16& cameraId, bool enabled,
1350        const sp<IBinder>& clientBinder) {
1351
1352    ATRACE_CALL();
1353    if (enabled && clientBinder == nullptr) {
1354        ALOGE("%s: torch client binder is NULL", __FUNCTION__);
1355        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT,
1356                "Torch client Binder is null");
1357    }
1358
1359    String8 id = String8(cameraId.string());
1360    int uid = getCallingUid();
1361
1362    // verify id is valid.
1363    auto state = getCameraState(id);
1364    if (state == nullptr) {
1365        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1366        return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
1367                "Camera ID \"%s\" is a not valid camera ID", id.string());
1368    }
1369
1370    int32_t cameraStatus = state->getStatus();
1371    if (cameraStatus != ICameraServiceListener::STATUS_PRESENT &&
1372            cameraStatus != ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1373        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1374        return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
1375                "Camera ID \"%s\" is a not valid camera ID", id.string());
1376    }
1377
1378    {
1379        Mutex::Autolock al(mTorchStatusMutex);
1380        int32_t status;
1381        status_t err = getTorchStatusLocked(id, &status);
1382        if (err != OK) {
1383            if (err == NAME_NOT_FOUND) {
1384                return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
1385                        "Camera \"%s\" does not have a flash unit", id.string());
1386            }
1387            ALOGE("%s: getting current torch status failed for camera %s",
1388                    __FUNCTION__, id.string());
1389            return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
1390                    "Error updating torch status for camera \"%s\": %s (%d)", id.string(),
1391                    strerror(-err), err);
1392        }
1393
1394        if (status == ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE) {
1395            if (cameraStatus == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1396                ALOGE("%s: torch mode of camera %s is not available because "
1397                        "camera is in use", __FUNCTION__, id.string());
1398                return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE,
1399                        "Torch for camera \"%s\" is not available due to an existing camera user",
1400                        id.string());
1401            } else {
1402                ALOGE("%s: torch mode of camera %s is not available due to "
1403                        "insufficient resources", __FUNCTION__, id.string());
1404                return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE,
1405                        "Torch for camera \"%s\" is not available due to insufficient resources",
1406                        id.string());
1407            }
1408        }
1409    }
1410
1411    {
1412        // Update UID map - this is used in the torch status changed callbacks, so must be done
1413        // before setTorchMode
1414        Mutex::Autolock al(mTorchUidMapMutex);
1415        if (mTorchUidMap.find(id) == mTorchUidMap.end()) {
1416            mTorchUidMap[id].first = uid;
1417            mTorchUidMap[id].second = uid;
1418        } else {
1419            // Set the pending UID
1420            mTorchUidMap[id].first = uid;
1421        }
1422    }
1423
1424    status_t err = mFlashlight->setTorchMode(id, enabled);
1425
1426    if (err != OK) {
1427        int32_t errorCode;
1428        String8 msg;
1429        switch (err) {
1430            case -ENOSYS:
1431                msg = String8::format("Camera \"%s\" has no flashlight",
1432                    id.string());
1433                errorCode = ERROR_ILLEGAL_ARGUMENT;
1434                break;
1435            default:
1436                msg = String8::format(
1437                    "Setting torch mode of camera \"%s\" to %d failed: %s (%d)",
1438                    id.string(), enabled, strerror(-err), err);
1439                errorCode = ERROR_INVALID_OPERATION;
1440        }
1441        ALOGE("%s: %s", __FUNCTION__, msg.string());
1442        return STATUS_ERROR(errorCode, msg.string());
1443    }
1444
1445    {
1446        // update the link to client's death
1447        Mutex::Autolock al(mTorchClientMapMutex);
1448        ssize_t index = mTorchClientMap.indexOfKey(id);
1449        if (enabled) {
1450            if (index == NAME_NOT_FOUND) {
1451                mTorchClientMap.add(id, clientBinder);
1452            } else {
1453                mTorchClientMap.valueAt(index)->unlinkToDeath(this);
1454                mTorchClientMap.replaceValueAt(index, clientBinder);
1455            }
1456            clientBinder->linkToDeath(this);
1457        } else if (index != NAME_NOT_FOUND) {
1458            mTorchClientMap.valueAt(index)->unlinkToDeath(this);
1459        }
1460    }
1461
1462    return Status::ok();
1463}
1464
1465Status CameraService::notifySystemEvent(int32_t eventId,
1466        const std::vector<int32_t>& args) {
1467    ATRACE_CALL();
1468
1469    switch(eventId) {
1470        case ICameraService::EVENT_USER_SWITCHED: {
1471            doUserSwitch(/*newUserIds*/ args);
1472            break;
1473        }
1474        case ICameraService::EVENT_NONE:
1475        default: {
1476            ALOGW("%s: Received invalid system event from system_server: %d", __FUNCTION__,
1477                    eventId);
1478            break;
1479        }
1480    }
1481    return Status::ok();
1482}
1483
1484Status CameraService::addListener(const sp<ICameraServiceListener>& listener) {
1485    ATRACE_CALL();
1486
1487    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
1488
1489    if (listener == nullptr) {
1490        ALOGE("%s: Listener must not be null", __FUNCTION__);
1491        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Null listener given to addListener");
1492    }
1493
1494    Mutex::Autolock lock(mServiceLock);
1495
1496    {
1497        Mutex::Autolock lock(mStatusListenerLock);
1498        for (auto& it : mListenerList) {
1499            if (IInterface::asBinder(it) == IInterface::asBinder(listener)) {
1500                ALOGW("%s: Tried to add listener %p which was already subscribed",
1501                      __FUNCTION__, listener.get());
1502                return STATUS_ERROR(ERROR_ALREADY_EXISTS, "Listener already registered");
1503            }
1504        }
1505
1506        mListenerList.push_back(listener);
1507    }
1508
1509
1510    /* Immediately signal current status to this listener only */
1511    {
1512        Mutex::Autolock lock(mCameraStatesLock);
1513        for (auto& i : mCameraStates) {
1514            // TODO: Update binder to use String16 for camera IDs and remove;
1515            int id = cameraIdToInt(i.first);
1516            if (id == -1) continue;
1517
1518            listener->onStatusChanged(i.second->getStatus(), id);
1519        }
1520    }
1521
1522    /* Immediately signal current torch status to this listener only */
1523    {
1524        Mutex::Autolock al(mTorchStatusMutex);
1525        for (size_t i = 0; i < mTorchStatusMap.size(); i++ ) {
1526            String16 id = String16(mTorchStatusMap.keyAt(i).string());
1527            listener->onTorchStatusChanged(mTorchStatusMap.valueAt(i), id);
1528        }
1529    }
1530
1531    return Status::ok();
1532}
1533
1534Status CameraService::removeListener(const sp<ICameraServiceListener>& listener) {
1535    ATRACE_CALL();
1536
1537    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
1538
1539    if (listener == 0) {
1540        ALOGE("%s: Listener must not be null", __FUNCTION__);
1541        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Null listener given to removeListener");
1542    }
1543
1544    Mutex::Autolock lock(mServiceLock);
1545
1546    {
1547        Mutex::Autolock lock(mStatusListenerLock);
1548        for (auto it = mListenerList.begin(); it != mListenerList.end(); it++) {
1549            if (IInterface::asBinder(*it) == IInterface::asBinder(listener)) {
1550                mListenerList.erase(it);
1551                return Status::ok();
1552            }
1553        }
1554    }
1555
1556    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
1557          __FUNCTION__, listener.get());
1558
1559    return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Unregistered listener given to removeListener");
1560}
1561
1562Status CameraService::getLegacyParameters(int cameraId, /*out*/String16* parameters) {
1563
1564    ATRACE_CALL();
1565    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1566
1567    if (parameters == NULL) {
1568        ALOGE("%s: parameters must not be null", __FUNCTION__);
1569        return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Parameters must not be null");
1570    }
1571
1572    Status ret = Status::ok();
1573
1574    CameraParameters shimParams;
1575    if (!(ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)).isOk()) {
1576        // Error logged by caller
1577        return ret;
1578    }
1579
1580    String8 shimParamsString8 = shimParams.flatten();
1581    String16 shimParamsString16 = String16(shimParamsString8);
1582
1583    *parameters = shimParamsString16;
1584
1585    return ret;
1586}
1587
1588Status CameraService::supportsCameraApi(int cameraId, int apiVersion, bool *isSupported) {
1589    ATRACE_CALL();
1590
1591    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1592
1593    switch (apiVersion) {
1594        case API_VERSION_1:
1595        case API_VERSION_2:
1596            break;
1597        default:
1598            String8 msg = String8::format("Unknown API version %d", apiVersion);
1599            ALOGE("%s: %s", __FUNCTION__, msg.string());
1600            return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string());
1601    }
1602
1603    int facing = -1;
1604    int deviceVersion = getDeviceVersion(cameraId, &facing);
1605
1606    switch(deviceVersion) {
1607        case CAMERA_DEVICE_API_VERSION_1_0:
1608        case CAMERA_DEVICE_API_VERSION_3_0:
1609        case CAMERA_DEVICE_API_VERSION_3_1:
1610            if (apiVersion == API_VERSION_2) {
1611                ALOGV("%s: Camera id %d uses HAL version %d <3.2, doesn't support api2 without shim",
1612                        __FUNCTION__, cameraId, deviceVersion);
1613                *isSupported = false;
1614            } else { // if (apiVersion == API_VERSION_1) {
1615                ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported",
1616                        __FUNCTION__, cameraId);
1617                *isSupported = true;
1618            }
1619            break;
1620        case CAMERA_DEVICE_API_VERSION_3_2:
1621        case CAMERA_DEVICE_API_VERSION_3_3:
1622            ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly",
1623                    __FUNCTION__, cameraId);
1624            *isSupported = true;
1625            break;
1626        case -1: {
1627            String8 msg = String8::format("Unknown camera ID %d", cameraId);
1628            ALOGE("%s: %s", __FUNCTION__, msg.string());
1629            return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string());
1630        }
1631        default: {
1632            String8 msg = String8::format("Unknown device version %d for device %d",
1633                    deviceVersion, cameraId);
1634            ALOGE("%s: %s", __FUNCTION__, msg.string());
1635            return STATUS_ERROR(ERROR_INVALID_OPERATION, msg.string());
1636        }
1637    }
1638
1639    return Status::ok();
1640}
1641
1642void CameraService::removeByClient(const BasicClient* client) {
1643    Mutex::Autolock lock(mServiceLock);
1644    for (auto& i : mActiveClientManager.getAll()) {
1645        auto clientSp = i->getValue();
1646        if (clientSp.get() == client) {
1647            mActiveClientManager.remove(i);
1648        }
1649    }
1650}
1651
1652bool CameraService::evictClientIdByRemote(const wp<IBinder>& remote) {
1653    const int callingPid = getCallingPid();
1654    const int servicePid = getpid();
1655    bool ret = false;
1656    {
1657        // Acquire mServiceLock and prevent other clients from connecting
1658        std::unique_ptr<AutoConditionLock> lock =
1659                AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1660
1661
1662        std::vector<sp<BasicClient>> evicted;
1663        for (auto& i : mActiveClientManager.getAll()) {
1664            auto clientSp = i->getValue();
1665            if (clientSp.get() == nullptr) {
1666                ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1667                mActiveClientManager.remove(i);
1668                continue;
1669            }
1670            if (remote == clientSp->getRemote() && (callingPid == servicePid ||
1671                    callingPid == clientSp->getClientPid())) {
1672                mActiveClientManager.remove(i);
1673                evicted.push_back(clientSp);
1674
1675                // Notify the client of disconnection
1676                clientSp->notifyError(
1677                        hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
1678                        CaptureResultExtras());
1679            }
1680        }
1681
1682        // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1683        // other clients from connecting in mServiceLockWrapper if held
1684        mServiceLock.unlock();
1685
1686        // Do not clear caller identity, remote caller should be client proccess
1687
1688        for (auto& i : evicted) {
1689            if (i.get() != nullptr) {
1690                i->disconnect();
1691                ret = true;
1692            }
1693        }
1694
1695        // Reacquire mServiceLock
1696        mServiceLock.lock();
1697
1698    } // lock is destroyed, allow further connect calls
1699
1700    return ret;
1701}
1702
1703
1704/**
1705 * Check camera capabilities, such as support for basic color operation
1706 * Also check that the device HAL version is still in support
1707 */
1708int CameraService::checkCameraCapabilities(int id, camera_info info, int *latestStrangeCameraId) {
1709    // device_version undefined in CAMERA_MODULE_API_VERSION_1_0,
1710    // All CAMERA_MODULE_API_VERSION_1_0 devices are backward-compatible
1711    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) {
1712        // Verify the device version is in the supported range
1713        switch (info.device_version) {
1714            case CAMERA_DEVICE_API_VERSION_1_0:
1715            case CAMERA_DEVICE_API_VERSION_3_0:
1716            case CAMERA_DEVICE_API_VERSION_3_1:
1717            case CAMERA_DEVICE_API_VERSION_3_2:
1718            case CAMERA_DEVICE_API_VERSION_3_3:
1719                // in support
1720                break;
1721            case CAMERA_DEVICE_API_VERSION_2_0:
1722            case CAMERA_DEVICE_API_VERSION_2_1:
1723                // no longer supported
1724            default:
1725                ALOGE("%s: Device %d has HAL version %x, which is not supported",
1726                        __FUNCTION__, id, info.device_version);
1727                String8 msg = String8::format(
1728                        "Unsupported device HAL version %x for device %d",
1729                        info.device_version, id);
1730                logServiceError(msg.string(), NO_INIT);
1731                return NO_INIT;
1732        }
1733    }
1734
1735    // Assume all devices pre-v3.3 are backward-compatible
1736    bool isBackwardCompatible = true;
1737    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0
1738            && info.device_version >= CAMERA_DEVICE_API_VERSION_3_3) {
1739        isBackwardCompatible = false;
1740        status_t res;
1741        camera_metadata_ro_entry_t caps;
1742        res = find_camera_metadata_ro_entry(
1743            info.static_camera_characteristics,
1744            ANDROID_REQUEST_AVAILABLE_CAPABILITIES,
1745            &caps);
1746        if (res != 0) {
1747            ALOGW("%s: Unable to find camera capabilities for camera device %d",
1748                    __FUNCTION__, id);
1749            caps.count = 0;
1750        }
1751        for (size_t i = 0; i < caps.count; i++) {
1752            if (caps.data.u8[i] ==
1753                    ANDROID_REQUEST_AVAILABLE_CAPABILITIES_BACKWARD_COMPATIBLE) {
1754                isBackwardCompatible = true;
1755                break;
1756            }
1757        }
1758    }
1759
1760    if (!isBackwardCompatible) {
1761        mNumberOfNormalCameras--;
1762        *latestStrangeCameraId = id;
1763    } else {
1764        if (id > *latestStrangeCameraId) {
1765            ALOGE("%s: Normal camera ID %d higher than strange camera ID %d. "
1766                    "This is not allowed due backward-compatibility requirements",
1767                    __FUNCTION__, id, *latestStrangeCameraId);
1768            logServiceError("Invalid order of camera devices", NO_INIT);
1769            mNumberOfCameras = 0;
1770            mNumberOfNormalCameras = 0;
1771            return NO_INIT;
1772        }
1773    }
1774    return OK;
1775}
1776
1777std::shared_ptr<CameraService::CameraState> CameraService::getCameraState(
1778        const String8& cameraId) const {
1779    std::shared_ptr<CameraState> state;
1780    {
1781        Mutex::Autolock lock(mCameraStatesLock);
1782        auto iter = mCameraStates.find(cameraId);
1783        if (iter != mCameraStates.end()) {
1784            state = iter->second;
1785        }
1786    }
1787    return state;
1788}
1789
1790sp<CameraService::BasicClient> CameraService::removeClientLocked(const String8& cameraId) {
1791    // Remove from active clients list
1792    auto clientDescriptorPtr = mActiveClientManager.remove(cameraId);
1793    if (clientDescriptorPtr == nullptr) {
1794        ALOGW("%s: Could not evict client, no client for camera ID %s", __FUNCTION__,
1795                cameraId.string());
1796        return sp<BasicClient>{nullptr};
1797    }
1798
1799    return clientDescriptorPtr->getValue();
1800}
1801
1802void CameraService::doUserSwitch(const std::vector<int32_t>& newUserIds) {
1803    // Acquire mServiceLock and prevent other clients from connecting
1804    std::unique_ptr<AutoConditionLock> lock =
1805            AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1806
1807    std::set<userid_t> newAllowedUsers;
1808    for (size_t i = 0; i < newUserIds.size(); i++) {
1809        if (newUserIds[i] < 0) {
1810            ALOGE("%s: Bad user ID %d given during user switch, ignoring.",
1811                    __FUNCTION__, newUserIds[i]);
1812            return;
1813        }
1814        newAllowedUsers.insert(static_cast<userid_t>(newUserIds[i]));
1815    }
1816
1817
1818    if (newAllowedUsers == mAllowedUsers) {
1819        ALOGW("%s: Received notification of user switch with no updated user IDs.", __FUNCTION__);
1820        return;
1821    }
1822
1823    logUserSwitch(mAllowedUsers, newAllowedUsers);
1824
1825    mAllowedUsers = std::move(newAllowedUsers);
1826
1827    // Current user has switched, evict all current clients.
1828    std::vector<sp<BasicClient>> evicted;
1829    for (auto& i : mActiveClientManager.getAll()) {
1830        auto clientSp = i->getValue();
1831
1832        if (clientSp.get() == nullptr) {
1833            ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1834            continue;
1835        }
1836
1837        // Don't evict clients that are still allowed.
1838        uid_t clientUid = clientSp->getClientUid();
1839        userid_t clientUserId = multiuser_get_user_id(clientUid);
1840        if (mAllowedUsers.find(clientUserId) != mAllowedUsers.end()) {
1841            continue;
1842        }
1843
1844        evicted.push_back(clientSp);
1845
1846        String8 curTime = getFormattedCurrentTime();
1847
1848        ALOGE("Evicting conflicting client for camera ID %s due to user change",
1849                i->getKey().string());
1850
1851        // Log the clients evicted
1852        logEvent(String8::format("EVICT device %s client held by package %s (PID %"
1853                PRId32 ", priority %" PRId32 ")\n   - Evicted due to user switch.",
1854                i->getKey().string(), String8{clientSp->getPackageName()}.string(),
1855                i->getOwnerId(), i->getPriority()));
1856
1857    }
1858
1859    // Do not hold mServiceLock while disconnecting clients, but retain the condition
1860    // blocking other clients from connecting in mServiceLockWrapper if held.
1861    mServiceLock.unlock();
1862
1863    // Clear caller identity temporarily so client disconnect PID checks work correctly
1864    int64_t token = IPCThreadState::self()->clearCallingIdentity();
1865
1866    for (auto& i : evicted) {
1867        i->disconnect();
1868    }
1869
1870    IPCThreadState::self()->restoreCallingIdentity(token);
1871
1872    // Reacquire mServiceLock
1873    mServiceLock.lock();
1874}
1875
1876void CameraService::logEvent(const char* event) {
1877    String8 curTime = getFormattedCurrentTime();
1878    Mutex::Autolock l(mLogLock);
1879    mEventLog.add(String8::format("%s : %s", curTime.string(), event));
1880}
1881
1882void CameraService::logDisconnected(const char* cameraId, int clientPid,
1883        const char* clientPackage) {
1884    // Log the clients evicted
1885    logEvent(String8::format("DISCONNECT device %s client for package %s (PID %d)", cameraId,
1886            clientPackage, clientPid));
1887}
1888
1889void CameraService::logConnected(const char* cameraId, int clientPid,
1890        const char* clientPackage) {
1891    // Log the clients evicted
1892    logEvent(String8::format("CONNECT device %s client for package %s (PID %d)", cameraId,
1893            clientPackage, clientPid));
1894}
1895
1896void CameraService::logRejected(const char* cameraId, int clientPid,
1897        const char* clientPackage, const char* reason) {
1898    // Log the client rejected
1899    logEvent(String8::format("REJECT device %s client for package %s (PID %d), reason: (%s)",
1900            cameraId, clientPackage, clientPid, reason));
1901}
1902
1903void CameraService::logUserSwitch(const std::set<userid_t>& oldUserIds,
1904        const std::set<userid_t>& newUserIds) {
1905    String8 newUsers = toString(newUserIds);
1906    String8 oldUsers = toString(oldUserIds);
1907    // Log the new and old users
1908    logEvent(String8::format("USER_SWITCH previous allowed users: %s , current allowed users: %s",
1909            oldUsers.string(), newUsers.string()));
1910}
1911
1912void CameraService::logDeviceRemoved(const char* cameraId, const char* reason) {
1913    // Log the device removal
1914    logEvent(String8::format("REMOVE device %s, reason: (%s)", cameraId, reason));
1915}
1916
1917void CameraService::logDeviceAdded(const char* cameraId, const char* reason) {
1918    // Log the device removal
1919    logEvent(String8::format("ADD device %s, reason: (%s)", cameraId, reason));
1920}
1921
1922void CameraService::logClientDied(int clientPid, const char* reason) {
1923    // Log the device removal
1924    logEvent(String8::format("DIED client(s) with PID %d, reason: (%s)", clientPid, reason));
1925}
1926
1927void CameraService::logServiceError(const char* msg, int errorCode) {
1928    String8 curTime = getFormattedCurrentTime();
1929    logEvent(String8::format("SERVICE ERROR: %s : %d (%s)", msg, errorCode, strerror(-errorCode)));
1930}
1931
1932status_t CameraService::onTransact(uint32_t code, const Parcel& data, Parcel* reply,
1933        uint32_t flags) {
1934
1935    const int pid = getCallingPid();
1936    const int selfPid = getpid();
1937
1938    // Permission checks
1939    switch (code) {
1940        case BnCameraService::NOTIFYSYSTEMEVENT: {
1941            if (pid != selfPid) {
1942                // Ensure we're being called by system_server, or similar process with
1943                // permissions to notify the camera service about system events
1944                if (!checkCallingPermission(
1945                        String16("android.permission.CAMERA_SEND_SYSTEM_EVENTS"))) {
1946                    const int uid = getCallingUid();
1947                    ALOGE("Permission Denial: cannot send updates to camera service about system"
1948                            " events from pid=%d, uid=%d", pid, uid);
1949                    return PERMISSION_DENIED;
1950                }
1951            }
1952            break;
1953        }
1954    }
1955
1956    return BnCameraService::onTransact(code, data, reply, flags);
1957}
1958
1959// We share the media players for shutter and recording sound for all clients.
1960// A reference count is kept to determine when we will actually release the
1961// media players.
1962
1963MediaPlayer* CameraService::newMediaPlayer(const char *file) {
1964    MediaPlayer* mp = new MediaPlayer();
1965    if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) {
1966        mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
1967        mp->prepare();
1968    } else {
1969        ALOGE("Failed to load CameraService sounds: %s", file);
1970        return NULL;
1971    }
1972    return mp;
1973}
1974
1975void CameraService::loadSound() {
1976    ATRACE_CALL();
1977
1978    Mutex::Autolock lock(mSoundLock);
1979    LOG1("CameraService::loadSound ref=%d", mSoundRef);
1980    if (mSoundRef++) return;
1981
1982    mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
1983    mSoundPlayer[SOUND_RECORDING_START] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
1984    mSoundPlayer[SOUND_RECORDING_STOP] = newMediaPlayer("/system/media/audio/ui/VideoStop.ogg");
1985}
1986
1987void CameraService::releaseSound() {
1988    Mutex::Autolock lock(mSoundLock);
1989    LOG1("CameraService::releaseSound ref=%d", mSoundRef);
1990    if (--mSoundRef) return;
1991
1992    for (int i = 0; i < NUM_SOUNDS; i++) {
1993        if (mSoundPlayer[i] != 0) {
1994            mSoundPlayer[i]->disconnect();
1995            mSoundPlayer[i].clear();
1996        }
1997    }
1998}
1999
2000void CameraService::playSound(sound_kind kind) {
2001    ATRACE_CALL();
2002
2003    LOG1("playSound(%d)", kind);
2004    Mutex::Autolock lock(mSoundLock);
2005    sp<MediaPlayer> player = mSoundPlayer[kind];
2006    if (player != 0) {
2007        player->seekTo(0);
2008        player->start();
2009    }
2010}
2011
2012// ----------------------------------------------------------------------------
2013
2014CameraService::Client::Client(const sp<CameraService>& cameraService,
2015        const sp<ICameraClient>& cameraClient,
2016        const String16& clientPackageName,
2017        int cameraId, int cameraFacing,
2018        int clientPid, uid_t clientUid,
2019        int servicePid) :
2020        CameraService::BasicClient(cameraService,
2021                IInterface::asBinder(cameraClient),
2022                clientPackageName,
2023                cameraId, cameraFacing,
2024                clientPid, clientUid,
2025                servicePid)
2026{
2027    int callingPid = getCallingPid();
2028    LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
2029
2030    mRemoteCallback = cameraClient;
2031
2032    cameraService->loadSound();
2033
2034    LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
2035}
2036
2037// tear down the client
2038CameraService::Client::~Client() {
2039    ALOGV("~Client");
2040    mDestructionStarted = true;
2041
2042    mCameraService->releaseSound();
2043    // unconditionally disconnect. function is idempotent
2044    Client::disconnect();
2045}
2046
2047CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
2048        const sp<IBinder>& remoteCallback,
2049        const String16& clientPackageName,
2050        int cameraId, int cameraFacing,
2051        int clientPid, uid_t clientUid,
2052        int servicePid):
2053        mClientPackageName(clientPackageName), mDisconnected(false)
2054{
2055    mCameraService = cameraService;
2056    mRemoteBinder = remoteCallback;
2057    mCameraId = cameraId;
2058    mCameraFacing = cameraFacing;
2059    mClientPid = clientPid;
2060    mClientUid = clientUid;
2061    mServicePid = servicePid;
2062    mOpsActive = false;
2063    mDestructionStarted = false;
2064
2065    // In some cases the calling code has no access to the package it runs under.
2066    // For example, NDK camera API.
2067    // In this case we will get the packages for the calling UID and pick the first one
2068    // for attributing the app op. This will work correctly for runtime permissions
2069    // as for legacy apps we will toggle the app op for all packages in the UID.
2070    // The caveat is that the operation may be attributed to the wrong package and
2071    // stats based on app ops may be slightly off.
2072    if (mClientPackageName.size() <= 0) {
2073        sp<IServiceManager> sm = defaultServiceManager();
2074        sp<IBinder> binder = sm->getService(String16(kPermissionServiceName));
2075        if (binder == 0) {
2076            ALOGE("Cannot get permission service");
2077            // Leave mClientPackageName unchanged (empty) and the further interaction
2078            // with camera will fail in BasicClient::startCameraOps
2079            return;
2080        }
2081
2082        sp<IPermissionController> permCtrl = interface_cast<IPermissionController>(binder);
2083        Vector<String16> packages;
2084
2085        permCtrl->getPackagesForUid(mClientUid, packages);
2086
2087        if (packages.isEmpty()) {
2088            ALOGE("No packages for calling UID");
2089            // Leave mClientPackageName unchanged (empty) and the further interaction
2090            // with camera will fail in BasicClient::startCameraOps
2091            return;
2092        }
2093        mClientPackageName = packages[0];
2094    }
2095}
2096
2097CameraService::BasicClient::~BasicClient() {
2098    ALOGV("~BasicClient");
2099    mDestructionStarted = true;
2100}
2101
2102binder::Status CameraService::BasicClient::disconnect() {
2103    binder::Status res = Status::ok();
2104    if (mDisconnected) {
2105        return res;
2106    }
2107    mDisconnected = true;
2108
2109    mCameraService->removeByClient(this);
2110    mCameraService->logDisconnected(String8::format("%d", mCameraId), mClientPid,
2111            String8(mClientPackageName));
2112
2113    sp<IBinder> remote = getRemote();
2114    if (remote != nullptr) {
2115        remote->unlinkToDeath(mCameraService);
2116    }
2117
2118    finishCameraOps();
2119    ALOGI("%s: Disconnected client for camera %d for PID %d", __FUNCTION__, mCameraId, mClientPid);
2120
2121    // client shouldn't be able to call into us anymore
2122    mClientPid = 0;
2123
2124    return res;
2125}
2126
2127status_t CameraService::BasicClient::dump(int, const Vector<String16>&) {
2128    // No dumping of clients directly over Binder,
2129    // must go through CameraService::dump
2130    android_errorWriteWithInfoLog(SN_EVENT_LOG_ID, "26265403",
2131            IPCThreadState::self()->getCallingUid(), NULL, 0);
2132    return OK;
2133}
2134
2135String16 CameraService::BasicClient::getPackageName() const {
2136    return mClientPackageName;
2137}
2138
2139
2140int CameraService::BasicClient::getClientPid() const {
2141    return mClientPid;
2142}
2143
2144uid_t CameraService::BasicClient::getClientUid() const {
2145    return mClientUid;
2146}
2147
2148bool CameraService::BasicClient::canCastToApiClient(apiLevel level) const {
2149    // Defaults to API2.
2150    return level == API_2;
2151}
2152
2153status_t CameraService::BasicClient::startCameraOps() {
2154    ATRACE_CALL();
2155
2156    int32_t res;
2157    // Notify app ops that the camera is not available
2158    mOpsCallback = new OpsCallback(this);
2159
2160    {
2161        ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
2162              __FUNCTION__, String8(mClientPackageName).string(), mClientUid);
2163    }
2164
2165    mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
2166            mClientPackageName, mOpsCallback);
2167    res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
2168            mClientUid, mClientPackageName);
2169
2170    if (res == AppOpsManager::MODE_ERRORED) {
2171        ALOGI("Camera %d: Access for \"%s\" has been revoked",
2172                mCameraId, String8(mClientPackageName).string());
2173        return PERMISSION_DENIED;
2174    }
2175
2176    if (res == AppOpsManager::MODE_IGNORED) {
2177        ALOGI("Camera %d: Access for \"%s\" has been restricted",
2178                mCameraId, String8(mClientPackageName).string());
2179        // Return the same error as for device policy manager rejection
2180        return -EACCES;
2181    }
2182
2183    mOpsActive = true;
2184
2185    // Transition device availability listeners from PRESENT -> NOT_AVAILABLE
2186    mCameraService->updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
2187            String8::format("%d", mCameraId));
2188
2189    // Transition device state to OPEN
2190    mCameraService->updateProxyDeviceState(ICameraServiceProxy::CAMERA_STATE_OPEN,
2191            String8::format("%d", mCameraId));
2192
2193    return OK;
2194}
2195
2196status_t CameraService::BasicClient::finishCameraOps() {
2197    ATRACE_CALL();
2198
2199    // Check if startCameraOps succeeded, and if so, finish the camera op
2200    if (mOpsActive) {
2201        // Notify app ops that the camera is available again
2202        mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
2203                mClientPackageName);
2204        mOpsActive = false;
2205
2206        std::initializer_list<int32_t> rejected = {ICameraServiceListener::STATUS_NOT_PRESENT,
2207                ICameraServiceListener::STATUS_ENUMERATING};
2208
2209        // Transition to PRESENT if the camera is not in either of the rejected states
2210        mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
2211                String8::format("%d", mCameraId), rejected);
2212
2213        // Transition device state to CLOSED
2214        mCameraService->updateProxyDeviceState(ICameraServiceProxy::CAMERA_STATE_CLOSED,
2215                String8::format("%d", mCameraId));
2216
2217        // Notify flashlight that a camera device is closed.
2218        mCameraService->mFlashlight->deviceClosed(
2219                String8::format("%d", mCameraId));
2220    }
2221    // Always stop watching, even if no camera op is active
2222    if (mOpsCallback != NULL) {
2223        mAppOpsManager.stopWatchingMode(mOpsCallback);
2224    }
2225    mOpsCallback.clear();
2226
2227    return OK;
2228}
2229
2230void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
2231    ATRACE_CALL();
2232
2233    String8 name(packageName);
2234    String8 myName(mClientPackageName);
2235
2236    if (op != AppOpsManager::OP_CAMERA) {
2237        ALOGW("Unexpected app ops notification received: %d", op);
2238        return;
2239    }
2240
2241    int32_t res;
2242    res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
2243            mClientUid, mClientPackageName);
2244    ALOGV("checkOp returns: %d, %s ", res,
2245            res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
2246            res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
2247            res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
2248            "UNKNOWN");
2249
2250    if (res != AppOpsManager::MODE_ALLOWED) {
2251        ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
2252                myName.string());
2253        // Reset the client PID to allow server-initiated disconnect,
2254        // and to prevent further calls by client.
2255        mClientPid = getCallingPid();
2256        CaptureResultExtras resultExtras; // a dummy result (invalid)
2257        notifyError(hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras);
2258        disconnect();
2259    }
2260}
2261
2262// ----------------------------------------------------------------------------
2263
2264// Provide client strong pointer for callbacks.
2265sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) {
2266    String8 cameraId = String8::format("%d", (int)(intptr_t) user);
2267    auto clientDescriptor = gCameraService->mActiveClientManager.get(cameraId);
2268    if (clientDescriptor != nullptr) {
2269        return sp<Client>{
2270                static_cast<Client*>(clientDescriptor->getValue().get())};
2271    }
2272    return sp<Client>{nullptr};
2273}
2274
2275void CameraService::Client::notifyError(int32_t errorCode,
2276        const CaptureResultExtras& resultExtras) {
2277    (void) errorCode;
2278    (void) resultExtras;
2279    if (mRemoteCallback != NULL) {
2280        mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
2281    } else {
2282        ALOGE("mRemoteCallback is NULL!!");
2283    }
2284}
2285
2286// NOTE: function is idempotent
2287binder::Status CameraService::Client::disconnect() {
2288    ALOGV("Client::disconnect");
2289    return BasicClient::disconnect();
2290}
2291
2292bool CameraService::Client::canCastToApiClient(apiLevel level) const {
2293    return level == API_1;
2294}
2295
2296CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
2297        mClient(client) {
2298}
2299
2300void CameraService::Client::OpsCallback::opChanged(int32_t op,
2301        const String16& packageName) {
2302    sp<BasicClient> client = mClient.promote();
2303    if (client != NULL) {
2304        client->opChanged(op, packageName);
2305    }
2306}
2307
2308// ----------------------------------------------------------------------------
2309//                  CameraState
2310// ----------------------------------------------------------------------------
2311
2312CameraService::CameraState::CameraState(const String8& id, int cost,
2313        const std::set<String8>& conflicting) : mId(id),
2314        mStatus(ICameraServiceListener::STATUS_PRESENT), mCost(cost), mConflicting(conflicting) {}
2315
2316CameraService::CameraState::~CameraState() {}
2317
2318int32_t CameraService::CameraState::getStatus() const {
2319    Mutex::Autolock lock(mStatusLock);
2320    return mStatus;
2321}
2322
2323CameraParameters CameraService::CameraState::getShimParams() const {
2324    return mShimParams;
2325}
2326
2327void CameraService::CameraState::setShimParams(const CameraParameters& params) {
2328    mShimParams = params;
2329}
2330
2331int CameraService::CameraState::getCost() const {
2332    return mCost;
2333}
2334
2335std::set<String8> CameraService::CameraState::getConflicting() const {
2336    return mConflicting;
2337}
2338
2339String8 CameraService::CameraState::getId() const {
2340    return mId;
2341}
2342
2343// ----------------------------------------------------------------------------
2344//                  ClientEventListener
2345// ----------------------------------------------------------------------------
2346
2347void CameraService::ClientEventListener::onClientAdded(
2348        const resource_policy::ClientDescriptor<String8,
2349        sp<CameraService::BasicClient>>& descriptor) {
2350    auto basicClient = descriptor.getValue();
2351    if (basicClient.get() != nullptr) {
2352        BatteryNotifier& notifier(BatteryNotifier::getInstance());
2353        notifier.noteStartCamera(descriptor.getKey(),
2354                static_cast<int>(basicClient->getClientUid()));
2355    }
2356}
2357
2358void CameraService::ClientEventListener::onClientRemoved(
2359        const resource_policy::ClientDescriptor<String8,
2360        sp<CameraService::BasicClient>>& descriptor) {
2361    auto basicClient = descriptor.getValue();
2362    if (basicClient.get() != nullptr) {
2363        BatteryNotifier& notifier(BatteryNotifier::getInstance());
2364        notifier.noteStopCamera(descriptor.getKey(),
2365                static_cast<int>(basicClient->getClientUid()));
2366    }
2367}
2368
2369
2370// ----------------------------------------------------------------------------
2371//                  CameraClientManager
2372// ----------------------------------------------------------------------------
2373
2374CameraService::CameraClientManager::CameraClientManager() {
2375    setListener(std::make_shared<ClientEventListener>());
2376}
2377
2378CameraService::CameraClientManager::~CameraClientManager() {}
2379
2380sp<CameraService::BasicClient> CameraService::CameraClientManager::getCameraClient(
2381        const String8& id) const {
2382    auto descriptor = get(id);
2383    if (descriptor == nullptr) {
2384        return sp<BasicClient>{nullptr};
2385    }
2386    return descriptor->getValue();
2387}
2388
2389String8 CameraService::CameraClientManager::toString() const {
2390    auto all = getAll();
2391    String8 ret("[");
2392    bool hasAny = false;
2393    for (auto& i : all) {
2394        hasAny = true;
2395        String8 key = i->getKey();
2396        int32_t cost = i->getCost();
2397        int32_t pid = i->getOwnerId();
2398        int32_t priority = i->getPriority();
2399        auto conflicting = i->getConflicting();
2400        auto clientSp = i->getValue();
2401        String8 packageName;
2402        userid_t clientUserId = 0;
2403        if (clientSp.get() != nullptr) {
2404            packageName = String8{clientSp->getPackageName()};
2405            uid_t clientUid = clientSp->getClientUid();
2406            clientUserId = multiuser_get_user_id(clientUid);
2407        }
2408        ret.appendFormat("\n(Camera ID: %s, Cost: %" PRId32 ", PID: %" PRId32 ", Priority: %"
2409                PRId32 ", ", key.string(), cost, pid, priority);
2410
2411        if (clientSp.get() != nullptr) {
2412            ret.appendFormat("User Id: %d, ", clientUserId);
2413        }
2414        if (packageName.size() != 0) {
2415            ret.appendFormat("Client Package Name: %s", packageName.string());
2416        }
2417
2418        ret.append(", Conflicting Client Devices: {");
2419        for (auto& j : conflicting) {
2420            ret.appendFormat("%s, ", j.string());
2421        }
2422        ret.append("})");
2423    }
2424    if (hasAny) ret.append("\n");
2425    ret.append("]\n");
2426    return ret;
2427}
2428
2429CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor(
2430        const String8& key, const sp<BasicClient>& value, int32_t cost,
2431        const std::set<String8>& conflictingKeys, int32_t priority, int32_t ownerId) {
2432
2433    return std::make_shared<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>(
2434            key, value, cost, conflictingKeys, priority, ownerId);
2435}
2436
2437CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor(
2438        const sp<BasicClient>& value, const CameraService::DescriptorPtr& partial) {
2439    return makeClientDescriptor(partial->getKey(), value, partial->getCost(),
2440            partial->getConflicting(), partial->getPriority(), partial->getOwnerId());
2441}
2442
2443// ----------------------------------------------------------------------------
2444
2445static const int kDumpLockRetries = 50;
2446static const int kDumpLockSleep = 60000;
2447
2448static bool tryLock(Mutex& mutex)
2449{
2450    bool locked = false;
2451    for (int i = 0; i < kDumpLockRetries; ++i) {
2452        if (mutex.tryLock() == NO_ERROR) {
2453            locked = true;
2454            break;
2455        }
2456        usleep(kDumpLockSleep);
2457    }
2458    return locked;
2459}
2460
2461status_t CameraService::dump(int fd, const Vector<String16>& args) {
2462    ATRACE_CALL();
2463
2464    String8 result("Dump of the Camera Service:\n");
2465    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
2466        result = result.format("Permission Denial: "
2467                "can't dump CameraService from pid=%d, uid=%d\n",
2468                getCallingPid(),
2469                getCallingUid());
2470        write(fd, result.string(), result.size());
2471    } else {
2472        bool locked = tryLock(mServiceLock);
2473        // failed to lock - CameraService is probably deadlocked
2474        if (!locked) {
2475            result.append("CameraService may be deadlocked\n");
2476            write(fd, result.string(), result.size());
2477        }
2478
2479        bool hasClient = false;
2480        if (!mModule) {
2481            result = String8::format("No camera module available!\n");
2482            write(fd, result.string(), result.size());
2483
2484            // Dump event log for error information
2485            dumpEventLog(fd);
2486
2487            if (locked) mServiceLock.unlock();
2488            return NO_ERROR;
2489        }
2490
2491        result = String8::format("Camera module HAL API version: 0x%x\n", mModule->getHalApiVersion());
2492        result.appendFormat("Camera module API version: 0x%x\n", mModule->getModuleApiVersion());
2493        result.appendFormat("Camera module name: %s\n", mModule->getModuleName());
2494        result.appendFormat("Camera module author: %s\n", mModule->getModuleAuthor());
2495        result.appendFormat("Number of camera devices: %d\n", mNumberOfCameras);
2496        result.appendFormat("Number of normal camera devices: %d\n", mNumberOfNormalCameras);
2497        String8 activeClientString = mActiveClientManager.toString();
2498        result.appendFormat("Active Camera Clients:\n%s", activeClientString.string());
2499        result.appendFormat("Allowed users:\n%s\n", toString(mAllowedUsers).string());
2500
2501        sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
2502        if (desc == NULL) {
2503            result.appendFormat("Vendor tags left unimplemented.\n");
2504        } else {
2505            result.appendFormat("Vendor tag definitions:\n");
2506        }
2507
2508        write(fd, result.string(), result.size());
2509
2510        if (desc != NULL) {
2511            desc->dump(fd, /*verbosity*/2, /*indentation*/4);
2512        }
2513
2514        dumpEventLog(fd);
2515
2516        bool stateLocked = tryLock(mCameraStatesLock);
2517        if (!stateLocked) {
2518            result = String8::format("CameraStates in use, may be deadlocked\n");
2519            write(fd, result.string(), result.size());
2520        }
2521
2522        for (auto& state : mCameraStates) {
2523            String8 cameraId = state.first;
2524            result = String8::format("Camera %s information:\n", cameraId.string());
2525            camera_info info;
2526
2527            // TODO: Change getCameraInfo + HAL to use String cameraIds
2528            status_t rc = mModule->getCameraInfo(cameraIdToInt(cameraId), &info);
2529            if (rc != OK) {
2530                result.appendFormat("  Error reading static information!\n");
2531                write(fd, result.string(), result.size());
2532            } else {
2533                result.appendFormat("  Facing: %s\n",
2534                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
2535                result.appendFormat("  Orientation: %d\n", info.orientation);
2536                int deviceVersion;
2537                if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0) {
2538                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
2539                } else {
2540                    deviceVersion = info.device_version;
2541                }
2542
2543                auto conflicting = state.second->getConflicting();
2544                result.appendFormat("  Resource Cost: %d\n", state.second->getCost());
2545                result.appendFormat("  Conflicting Devices:");
2546                for (auto& id : conflicting) {
2547                    result.appendFormat(" %s", id.string());
2548                }
2549                if (conflicting.size() == 0) {
2550                    result.appendFormat(" NONE");
2551                }
2552                result.appendFormat("\n");
2553
2554                result.appendFormat("  Device version: %#x\n", deviceVersion);
2555                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_3_0) {
2556                    result.appendFormat("  Device static metadata:\n");
2557                    write(fd, result.string(), result.size());
2558                    dump_indented_camera_metadata(info.static_camera_characteristics,
2559                            fd, /*verbosity*/2, /*indentation*/4);
2560                } else {
2561                    write(fd, result.string(), result.size());
2562                }
2563
2564                CameraParameters p = state.second->getShimParams();
2565                if (!p.isEmpty()) {
2566                    result = String8::format("  Camera1 API shim is using parameters:\n        ");
2567                    write(fd, result.string(), result.size());
2568                    p.dump(fd, args);
2569                }
2570            }
2571
2572            auto clientDescriptor = mActiveClientManager.get(cameraId);
2573            if (clientDescriptor == nullptr) {
2574                result = String8::format("  Device %s is closed, no client instance\n",
2575                        cameraId.string());
2576                write(fd, result.string(), result.size());
2577                continue;
2578            }
2579            hasClient = true;
2580            result = String8::format("  Device %s is open. Client instance dump:\n\n",
2581                    cameraId.string());
2582            result.appendFormat("Client priority level: %d\n", clientDescriptor->getPriority());
2583            result.appendFormat("Client PID: %d\n", clientDescriptor->getOwnerId());
2584
2585            auto client = clientDescriptor->getValue();
2586            result.appendFormat("Client package: %s\n",
2587                    String8(client->getPackageName()).string());
2588            write(fd, result.string(), result.size());
2589
2590            client->dumpClient(fd, args);
2591        }
2592
2593        if (stateLocked) mCameraStatesLock.unlock();
2594
2595        if (!hasClient) {
2596            result = String8::format("\nNo active camera clients yet.\n");
2597            write(fd, result.string(), result.size());
2598        }
2599
2600        if (locked) mServiceLock.unlock();
2601
2602        // Dump camera traces if there were any
2603        write(fd, "\n", 1);
2604        camera3::CameraTraces::dump(fd, args);
2605
2606        // change logging level
2607        int n = args.size();
2608        for (int i = 0; i + 1 < n; i++) {
2609            String16 verboseOption("-v");
2610            if (args[i] == verboseOption) {
2611                String8 levelStr(args[i+1]);
2612                int level = atoi(levelStr.string());
2613                result = String8::format("\nSetting log level to %d.\n", level);
2614                setLogLevel(level);
2615                write(fd, result.string(), result.size());
2616            }
2617        }
2618    }
2619    return NO_ERROR;
2620}
2621
2622void CameraService::dumpEventLog(int fd) {
2623    String8 result = String8("\nPrior client events (most recent at top):\n");
2624
2625    Mutex::Autolock l(mLogLock);
2626    for (const auto& msg : mEventLog) {
2627        result.appendFormat("  %s\n", msg.string());
2628    }
2629
2630    if (mEventLog.size() == DEFAULT_EVENT_LOG_LENGTH) {
2631        result.append("  ...\n");
2632    } else if (mEventLog.size() == 0) {
2633        result.append("  [no events yet]\n");
2634    }
2635    result.append("\n");
2636
2637    write(fd, result.string(), result.size());
2638}
2639
2640void CameraService::handleTorchClientBinderDied(const wp<IBinder> &who) {
2641    Mutex::Autolock al(mTorchClientMapMutex);
2642    for (size_t i = 0; i < mTorchClientMap.size(); i++) {
2643        if (mTorchClientMap[i] == who) {
2644            // turn off the torch mode that was turned on by dead client
2645            String8 cameraId = mTorchClientMap.keyAt(i);
2646            status_t res = mFlashlight->setTorchMode(cameraId, false);
2647            if (res) {
2648                ALOGE("%s: torch client died but couldn't turn off torch: "
2649                    "%s (%d)", __FUNCTION__, strerror(-res), res);
2650                return;
2651            }
2652            mTorchClientMap.removeItemsAt(i);
2653            break;
2654        }
2655    }
2656}
2657
2658/*virtual*/void CameraService::binderDied(const wp<IBinder> &who) {
2659
2660    /**
2661      * While tempting to promote the wp<IBinder> into a sp, it's actually not supported by the
2662      * binder driver
2663      */
2664
2665    logClientDied(getCallingPid(), String8("Binder died unexpectedly"));
2666
2667    // check torch client
2668    handleTorchClientBinderDied(who);
2669
2670    // check camera device client
2671    if(!evictClientIdByRemote(who)) {
2672        ALOGV("%s: Java client's binder death already cleaned up (normal case)", __FUNCTION__);
2673        return;
2674    }
2675
2676    ALOGE("%s: Java client's binder died, removing it from the list of active clients",
2677            __FUNCTION__);
2678}
2679
2680void CameraService::updateStatus(int32_t status, const String8& cameraId) {
2681    updateStatus(status, cameraId, {});
2682}
2683
2684void CameraService::updateStatus(int32_t status, const String8& cameraId,
2685        std::initializer_list<int32_t> rejectSourceStates) {
2686    // Do not lock mServiceLock here or can get into a deadlock from
2687    // connect() -> disconnect -> updateStatus
2688
2689    auto state = getCameraState(cameraId);
2690
2691    if (state == nullptr) {
2692        ALOGW("%s: Could not update the status for %s, no such device exists", __FUNCTION__,
2693                cameraId.string());
2694        return;
2695    }
2696
2697    // Update the status for this camera state, then send the onStatusChangedCallbacks to each
2698    // of the listeners with both the mStatusStatus and mStatusListenerLock held
2699    state->updateStatus(status, cameraId, rejectSourceStates, [this]
2700            (const String8& cameraId, int32_t status) {
2701
2702            if (status != ICameraServiceListener::STATUS_ENUMERATING) {
2703                // Update torch status if it has a flash unit.
2704                Mutex::Autolock al(mTorchStatusMutex);
2705                int32_t torchStatus;
2706                if (getTorchStatusLocked(cameraId, &torchStatus) !=
2707                        NAME_NOT_FOUND) {
2708                    int32_t newTorchStatus =
2709                            status == ICameraServiceListener::STATUS_PRESENT ?
2710                            ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF :
2711                            ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE;
2712                    if (torchStatus != newTorchStatus) {
2713                        onTorchStatusChangedLocked(cameraId, newTorchStatus);
2714                    }
2715                }
2716            }
2717
2718            Mutex::Autolock lock(mStatusListenerLock);
2719
2720            for (auto& listener : mListenerList) {
2721                // TODO: Refactor status listeners to use strings for Camera IDs and remove this.
2722                int id = cameraIdToInt(cameraId);
2723                if (id != -1) listener->onStatusChanged(status, id);
2724            }
2725        });
2726}
2727
2728void CameraService::updateProxyDeviceState(ICameraServiceProxy::CameraState newState,
2729        const String8& cameraId) {
2730    sp<ICameraServiceProxy> proxyBinder = getCameraServiceProxy();
2731    if (proxyBinder == nullptr) return;
2732    String16 id(cameraId);
2733    proxyBinder->notifyCameraState(id, newState);
2734}
2735
2736status_t CameraService::getTorchStatusLocked(
2737        const String8& cameraId,
2738        int32_t *status) const {
2739    if (!status) {
2740        return BAD_VALUE;
2741    }
2742    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2743    if (index == NAME_NOT_FOUND) {
2744        // invalid camera ID or the camera doesn't have a flash unit
2745        return NAME_NOT_FOUND;
2746    }
2747
2748    *status = mTorchStatusMap.valueAt(index);
2749    return OK;
2750}
2751
2752status_t CameraService::setTorchStatusLocked(const String8& cameraId,
2753        int32_t status) {
2754    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2755    if (index == NAME_NOT_FOUND) {
2756        return BAD_VALUE;
2757    }
2758    int32_t& item =
2759            mTorchStatusMap.editValueAt(index);
2760    item = status;
2761
2762    return OK;
2763}
2764
2765}; // namespace android
2766