CameraService.cpp revision 6267b539d0d1ee7118aafd976d75cb8db397bc24 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "CameraService"
18//#define LOG_NDEBUG 0
19
20#include <algorithm>
21#include <climits>
22#include <stdio.h>
23#include <cstring>
24#include <ctime>
25#include <string>
26#include <sys/types.h>
27#include <inttypes.h>
28#include <pthread.h>
29
30#include <binder/AppOpsManager.h>
31#include <binder/IPCThreadState.h>
32#include <binder/IServiceManager.h>
33#include <binder/MemoryBase.h>
34#include <binder/MemoryHeapBase.h>
35#include <binder/ProcessInfoService.h>
36#include <cutils/atomic.h>
37#include <cutils/properties.h>
38#include <gui/Surface.h>
39#include <hardware/hardware.h>
40#include <media/AudioSystem.h>
41#include <media/IMediaHTTPService.h>
42#include <media/mediaplayer.h>
43#include <utils/Errors.h>
44#include <utils/Log.h>
45#include <utils/String16.h>
46#include <utils/Trace.h>
47#include <system/camera_vendor_tags.h>
48#include <system/camera_metadata.h>
49#include <system/camera.h>
50
51#include "CameraService.h"
52#include "api1/CameraClient.h"
53#include "api1/Camera2Client.h"
54#include "api2/CameraDeviceClient.h"
55#include "utils/CameraTraces.h"
56#include "CameraDeviceFactory.h"
57
58namespace android {
59
60// ----------------------------------------------------------------------------
61// Logging support -- this is for debugging only
62// Use "adb shell dumpsys media.camera -v 1" to change it.
63volatile int32_t gLogLevel = 0;
64
65#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__);
66#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__);
67
68static void setLogLevel(int level) {
69    android_atomic_write(level, &gLogLevel);
70}
71
72// ----------------------------------------------------------------------------
73
74extern "C" {
75static void camera_device_status_change(
76        const struct camera_module_callbacks* callbacks,
77        int camera_id,
78        int new_status) {
79    sp<CameraService> cs = const_cast<CameraService*>(
80            static_cast<const CameraService*>(callbacks));
81
82    cs->onDeviceStatusChanged(static_cast<camera_device_status_t>(camera_id),
83            static_cast<camera_device_status_t>(new_status));
84}
85
86static void torch_mode_status_change(
87        const struct camera_module_callbacks* callbacks,
88        const char* camera_id,
89        int new_status) {
90    if (!callbacks || !camera_id) {
91        ALOGE("%s invalid parameters. callbacks %p, camera_id %p", __FUNCTION__,
92                callbacks, camera_id);
93    }
94    sp<CameraService> cs = const_cast<CameraService*>(
95                                static_cast<const CameraService*>(callbacks));
96
97    ICameraServiceListener::TorchStatus status;
98    switch (new_status) {
99        case TORCH_MODE_STATUS_NOT_AVAILABLE:
100            status = ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE;
101            break;
102        case TORCH_MODE_STATUS_AVAILABLE_OFF:
103            status = ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF;
104            break;
105        case TORCH_MODE_STATUS_AVAILABLE_ON:
106            status = ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON;
107            break;
108        default:
109            ALOGE("Unknown torch status %d", new_status);
110            return;
111    }
112
113    cs->onTorchStatusChanged(
114        String8(camera_id),
115        status);
116}
117} // extern "C"
118
119// ----------------------------------------------------------------------------
120
121// This is ugly and only safe if we never re-create the CameraService, but
122// should be ok for now.
123static CameraService *gCameraService;
124
125CameraService::CameraService() : mEventLog(DEFAULT_EVENT_LOG_LENGTH), mAllowedUsers(),
126        mSoundRef(0), mModule(0), mFlashlight(0) {
127    ALOGI("CameraService started (pid=%d)", getpid());
128    gCameraService = this;
129
130    this->camera_device_status_change = android::camera_device_status_change;
131    this->torch_mode_status_change = android::torch_mode_status_change;
132
133    mServiceLockWrapper = std::make_shared<WaitableMutexWrapper>(&mServiceLock);
134}
135
136void CameraService::onFirstRef()
137{
138    ALOGI("CameraService process starting");
139
140    BnCameraService::onFirstRef();
141
142    camera_module_t *rawModule;
143    int err = hw_get_module(CAMERA_HARDWARE_MODULE_ID,
144            (const hw_module_t **)&rawModule);
145    if (err < 0) {
146        ALOGE("Could not load camera HAL module: %d (%s)", err, strerror(-err));
147        logServiceError("Could not load camera HAL module", err);
148        mNumberOfCameras = 0;
149        return;
150    }
151
152    mModule = new CameraModule(rawModule);
153    ALOGI("Loaded \"%s\" camera module", mModule->getModuleName());
154    err = mModule->init();
155    if (err != OK) {
156        ALOGE("Could not initialize camera HAL module: %d (%s)", err,
157            strerror(-err));
158        logServiceError("Could not initialize camera HAL module", err);
159
160        mNumberOfCameras = 0;
161        delete mModule;
162        mModule = nullptr;
163        return;
164    }
165
166    mNumberOfCameras = mModule->getNumberOfCameras();
167
168    mFlashlight = new CameraFlashlight(*mModule, *this);
169    status_t res = mFlashlight->findFlashUnits();
170    if (res) {
171        // impossible because we haven't open any camera devices.
172        ALOGE("Failed to find flash units.");
173    }
174
175    for (int i = 0; i < mNumberOfCameras; i++) {
176        String8 cameraId = String8::format("%d", i);
177
178        // Defaults to use for cost and conflicting devices
179        int cost = 100;
180        char** conflicting_devices = nullptr;
181        size_t conflicting_devices_length = 0;
182
183        // If using post-2.4 module version, query the cost + conflicting devices from the HAL
184        if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_4) {
185            struct camera_info info;
186            status_t rc = mModule->getCameraInfo(i, &info);
187            if (rc == NO_ERROR) {
188                cost = info.resource_cost;
189                conflicting_devices = info.conflicting_devices;
190                conflicting_devices_length = info.conflicting_devices_length;
191            } else {
192                ALOGE("%s: Received error loading camera info for device %d, cost and"
193                        " conflicting devices fields set to defaults for this device.",
194                        __FUNCTION__, i);
195            }
196        }
197
198        std::set<String8> conflicting;
199        for (size_t i = 0; i < conflicting_devices_length; i++) {
200            conflicting.emplace(String8(conflicting_devices[i]));
201        }
202
203        // Initialize state for each camera device
204        {
205            Mutex::Autolock lock(mCameraStatesLock);
206            mCameraStates.emplace(cameraId, std::make_shared<CameraState>(cameraId, cost,
207                    conflicting));
208        }
209
210        if (mFlashlight->hasFlashUnit(cameraId)) {
211            mTorchStatusMap.add(cameraId,
212                    ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF);
213        }
214    }
215
216    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_1) {
217        mModule->setCallbacks(this);
218    }
219
220    VendorTagDescriptor::clearGlobalVendorTagDescriptor();
221
222    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_2) {
223        setUpVendorTags();
224    }
225
226    CameraDeviceFactory::registerService(this);
227}
228
229CameraService::~CameraService() {
230    if (mModule) {
231        delete mModule;
232        mModule = nullptr;
233    }
234    VendorTagDescriptor::clearGlobalVendorTagDescriptor();
235    gCameraService = nullptr;
236}
237
238void CameraService::onDeviceStatusChanged(camera_device_status_t  cameraId,
239        camera_device_status_t newStatus) {
240    ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__,
241          cameraId, newStatus);
242
243    String8 id = String8::format("%d", cameraId);
244    std::shared_ptr<CameraState> state = getCameraState(id);
245
246    if (state == nullptr) {
247        ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId);
248        return;
249    }
250
251    ICameraServiceListener::Status oldStatus = state->getStatus();
252
253    if (oldStatus == static_cast<ICameraServiceListener::Status>(newStatus)) {
254        ALOGE("%s: State transition to the same status %#x not allowed", __FUNCTION__, newStatus);
255        return;
256    }
257
258    if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) {
259        logDeviceRemoved(id, String8::format("Device status changed from %d to %d", oldStatus,
260                newStatus));
261        sp<BasicClient> clientToDisconnect;
262        {
263            // Don't do this in updateStatus to avoid deadlock over mServiceLock
264            Mutex::Autolock lock(mServiceLock);
265
266            // Set the device status to NOT_PRESENT, clients will no longer be able to connect
267            // to this device until the status changes
268            updateStatus(ICameraServiceListener::STATUS_NOT_PRESENT, id);
269
270            // Remove cached shim parameters
271            state->setShimParams(CameraParameters());
272
273            // Remove the client from the list of active clients
274            clientToDisconnect = removeClientLocked(id);
275
276            // Notify the client of disconnection
277            clientToDisconnect->notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
278                    CaptureResultExtras{});
279        }
280
281        ALOGI("%s: Client for camera ID %s evicted due to device status change from HAL",
282                __FUNCTION__, id.string());
283
284        // Disconnect client
285        if (clientToDisconnect.get() != nullptr) {
286            // Ensure not in binder RPC so client disconnect PID checks work correctly
287            LOG_ALWAYS_FATAL_IF(getCallingPid() != getpid(),
288                    "onDeviceStatusChanged must be called from the camera service process!");
289            clientToDisconnect->disconnect();
290        }
291
292    } else {
293        if (oldStatus == ICameraServiceListener::Status::STATUS_NOT_PRESENT) {
294            logDeviceAdded(id, String8::format("Device status changed from %d to %d", oldStatus,
295                    newStatus));
296        }
297        updateStatus(static_cast<ICameraServiceListener::Status>(newStatus), id);
298    }
299
300}
301
302void CameraService::onTorchStatusChanged(const String8& cameraId,
303        ICameraServiceListener::TorchStatus newStatus) {
304    Mutex::Autolock al(mTorchStatusMutex);
305    onTorchStatusChangedLocked(cameraId, newStatus);
306}
307
308void CameraService::onTorchStatusChangedLocked(const String8& cameraId,
309        ICameraServiceListener::TorchStatus newStatus) {
310    ALOGI("%s: Torch status changed for cameraId=%s, newStatus=%d",
311            __FUNCTION__, cameraId.string(), newStatus);
312
313    ICameraServiceListener::TorchStatus status;
314    status_t res = getTorchStatusLocked(cameraId, &status);
315    if (res) {
316        ALOGE("%s: cannot get torch status of camera %s: %s (%d)",
317                __FUNCTION__, cameraId.string(), strerror(-res), res);
318        return;
319    }
320    if (status == newStatus) {
321        return;
322    }
323
324    res = setTorchStatusLocked(cameraId, newStatus);
325    if (res) {
326        ALOGE("%s: Failed to set the torch status", __FUNCTION__,
327                (uint32_t)newStatus);
328        return;
329    }
330
331    {
332        Mutex::Autolock lock(mStatusListenerLock);
333        for (auto& i : mListenerList) {
334            i->onTorchStatusChanged(newStatus, String16{cameraId});
335        }
336    }
337}
338
339
340int32_t CameraService::getNumberOfCameras() {
341    return mNumberOfCameras;
342}
343
344status_t CameraService::getCameraInfo(int cameraId,
345                                      struct CameraInfo* cameraInfo) {
346    if (!mModule) {
347        return -ENODEV;
348    }
349
350    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
351        return BAD_VALUE;
352    }
353
354    struct camera_info info;
355    status_t rc = filterGetInfoErrorCode(
356        mModule->getCameraInfo(cameraId, &info));
357    cameraInfo->facing = info.facing;
358    cameraInfo->orientation = info.orientation;
359    return rc;
360}
361
362int CameraService::cameraIdToInt(const String8& cameraId) {
363    errno = 0;
364    size_t pos = 0;
365    int ret = stoi(std::string{cameraId.string()}, &pos);
366    if (errno != 0 || pos != cameraId.size()) {
367        return -1;
368    }
369    return ret;
370}
371
372status_t CameraService::generateShimMetadata(int cameraId, /*out*/CameraMetadata* cameraInfo) {
373    status_t ret = OK;
374    struct CameraInfo info;
375    if ((ret = getCameraInfo(cameraId, &info)) != OK) {
376        return ret;
377    }
378
379    CameraMetadata shimInfo;
380    int32_t orientation = static_cast<int32_t>(info.orientation);
381    if ((ret = shimInfo.update(ANDROID_SENSOR_ORIENTATION, &orientation, 1)) != OK) {
382        return ret;
383    }
384
385    uint8_t facing = (info.facing == CAMERA_FACING_FRONT) ?
386            ANDROID_LENS_FACING_FRONT : ANDROID_LENS_FACING_BACK;
387    if ((ret = shimInfo.update(ANDROID_LENS_FACING, &facing, 1)) != OK) {
388        return ret;
389    }
390
391    CameraParameters shimParams;
392    if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) {
393        // Error logged by callee
394        return ret;
395    }
396
397    Vector<Size> sizes;
398    Vector<Size> jpegSizes;
399    Vector<int32_t> formats;
400    const char* supportedPreviewFormats;
401    {
402        shimParams.getSupportedPreviewSizes(/*out*/sizes);
403        shimParams.getSupportedPreviewFormats(/*out*/formats);
404        shimParams.getSupportedPictureSizes(/*out*/jpegSizes);
405    }
406
407    // Always include IMPLEMENTATION_DEFINED
408    formats.add(HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED);
409
410    const size_t INTS_PER_CONFIG = 4;
411
412    // Build available stream configurations metadata
413    size_t streamConfigSize = (sizes.size() * formats.size() + jpegSizes.size()) * INTS_PER_CONFIG;
414
415    Vector<int32_t> streamConfigs;
416    streamConfigs.setCapacity(streamConfigSize);
417
418    for (size_t i = 0; i < formats.size(); ++i) {
419        for (size_t j = 0; j < sizes.size(); ++j) {
420            streamConfigs.add(formats[i]);
421            streamConfigs.add(sizes[j].width);
422            streamConfigs.add(sizes[j].height);
423            streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
424        }
425    }
426
427    for (size_t i = 0; i < jpegSizes.size(); ++i) {
428        streamConfigs.add(HAL_PIXEL_FORMAT_BLOB);
429        streamConfigs.add(jpegSizes[i].width);
430        streamConfigs.add(jpegSizes[i].height);
431        streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
432    }
433
434    if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS,
435            streamConfigs.array(), streamConfigSize)) != OK) {
436        return ret;
437    }
438
439    int64_t fakeMinFrames[0];
440    // TODO: Fixme, don't fake min frame durations.
441    if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_MIN_FRAME_DURATIONS,
442            fakeMinFrames, 0)) != OK) {
443        return ret;
444    }
445
446    int64_t fakeStalls[0];
447    // TODO: Fixme, don't fake stall durations.
448    if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_STALL_DURATIONS,
449            fakeStalls, 0)) != OK) {
450        return ret;
451    }
452
453    *cameraInfo = shimInfo;
454    return OK;
455}
456
457status_t CameraService::getCameraCharacteristics(int cameraId,
458                                                CameraMetadata* cameraInfo) {
459    if (!cameraInfo) {
460        ALOGE("%s: cameraInfo is NULL", __FUNCTION__);
461        return BAD_VALUE;
462    }
463
464    if (!mModule) {
465        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
466        return -ENODEV;
467    }
468
469    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
470        ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId);
471        return BAD_VALUE;
472    }
473
474    int facing;
475    status_t ret = OK;
476    if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0 ||
477            getDeviceVersion(cameraId, &facing) <= CAMERA_DEVICE_API_VERSION_2_1 ) {
478        /**
479         * Backwards compatibility mode for old HALs:
480         * - Convert CameraInfo into static CameraMetadata properties.
481         * - Retrieve cached CameraParameters for this camera.  If none exist,
482         *   attempt to open CameraClient and retrieve the CameraParameters.
483         * - Convert cached CameraParameters into static CameraMetadata
484         *   properties.
485         */
486        ALOGI("%s: Switching to HAL1 shim implementation...", __FUNCTION__);
487
488        if ((ret = generateShimMetadata(cameraId, cameraInfo)) != OK) {
489            return ret;
490        }
491
492    } else {
493        /**
494         * Normal HAL 2.1+ codepath.
495         */
496        struct camera_info info;
497        ret = filterGetInfoErrorCode(mModule->getCameraInfo(cameraId, &info));
498        *cameraInfo = info.static_camera_characteristics;
499    }
500
501    return ret;
502}
503
504int CameraService::getCallingPid() {
505    return IPCThreadState::self()->getCallingPid();
506}
507
508int CameraService::getCallingUid() {
509    return IPCThreadState::self()->getCallingUid();
510}
511
512String8 CameraService::getFormattedCurrentTime() {
513    time_t now = time(nullptr);
514    char formattedTime[64];
515    strftime(formattedTime, sizeof(formattedTime), "%m-%d %H:%M:%S", localtime(&now));
516    return String8(formattedTime);
517}
518
519int CameraService::getCameraPriorityFromProcState(int procState) {
520    // Find the priority for the camera usage based on the process state.  Higher priority clients
521    // win for evictions.
522    if (procState < 0) {
523        ALOGE("%s: Received invalid process state %d from ActivityManagerService!", __FUNCTION__,
524                procState);
525        return -1;
526    }
527    return INT_MAX - procState;
528}
529
530status_t CameraService::getCameraVendorTagDescriptor(/*out*/sp<VendorTagDescriptor>& desc) {
531    if (!mModule) {
532        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
533        return -ENODEV;
534    }
535
536    desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
537    return OK;
538}
539
540int CameraService::getDeviceVersion(int cameraId, int* facing) {
541    struct camera_info info;
542    if (mModule->getCameraInfo(cameraId, &info) != OK) {
543        return -1;
544    }
545
546    int deviceVersion;
547    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) {
548        deviceVersion = info.device_version;
549    } else {
550        deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
551    }
552
553    if (facing) {
554        *facing = info.facing;
555    }
556
557    return deviceVersion;
558}
559
560status_t CameraService::filterGetInfoErrorCode(status_t err) {
561    switch(err) {
562        case NO_ERROR:
563        case -EINVAL:
564            return err;
565        default:
566            break;
567    }
568    return -ENODEV;
569}
570
571bool CameraService::setUpVendorTags() {
572    vendor_tag_ops_t vOps = vendor_tag_ops_t();
573
574    // Check if vendor operations have been implemented
575    if (!mModule->isVendorTagDefined()) {
576        ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__);
577        return false;
578    }
579
580    ATRACE_BEGIN("camera3->get_metadata_vendor_tag_ops");
581    mModule->getVendorTagOps(&vOps);
582    ATRACE_END();
583
584    // Ensure all vendor operations are present
585    if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL ||
586            vOps.get_section_name == NULL || vOps.get_tag_name == NULL ||
587            vOps.get_tag_type == NULL) {
588        ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions."
589               , __FUNCTION__);
590        return false;
591    }
592
593    // Read all vendor tag definitions into a descriptor
594    sp<VendorTagDescriptor> desc;
595    status_t res;
596    if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc))
597            != OK) {
598        ALOGE("%s: Could not generate descriptor from vendor tag operations,"
599              "received error %s (%d). Camera clients will not be able to use"
600              "vendor tags", __FUNCTION__, strerror(res), res);
601        return false;
602    }
603
604    // Set the global descriptor to use with camera metadata
605    VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc);
606    return true;
607}
608
609status_t CameraService::makeClient(const sp<CameraService>& cameraService,
610        const sp<IInterface>& cameraCb, const String16& packageName, const String8& cameraId,
611        int facing, int clientPid, uid_t clientUid, int servicePid, bool legacyMode,
612        int halVersion, int deviceVersion, apiLevel effectiveApiLevel,
613        /*out*/sp<BasicClient>* client) {
614
615    // TODO: Update CameraClients + HAL interface to use strings for Camera IDs
616    int id = cameraIdToInt(cameraId);
617    if (id == -1) {
618        ALOGE("%s: Invalid camera ID %s, cannot convert to integer.", __FUNCTION__,
619                cameraId.string());
620        return BAD_VALUE;
621    }
622
623    if (halVersion < 0 || halVersion == deviceVersion) {
624        // Default path: HAL version is unspecified by caller, create CameraClient
625        // based on device version reported by the HAL.
626        switch(deviceVersion) {
627          case CAMERA_DEVICE_API_VERSION_1_0:
628            if (effectiveApiLevel == API_1) {  // Camera1 API route
629                sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
630                *client = new CameraClient(cameraService, tmp, packageName, id, facing,
631                        clientPid, clientUid, getpid(), legacyMode);
632            } else { // Camera2 API route
633                ALOGW("Camera using old HAL version: %d", deviceVersion);
634                return -EOPNOTSUPP;
635            }
636            break;
637          case CAMERA_DEVICE_API_VERSION_2_0:
638          case CAMERA_DEVICE_API_VERSION_2_1:
639          case CAMERA_DEVICE_API_VERSION_3_0:
640          case CAMERA_DEVICE_API_VERSION_3_1:
641          case CAMERA_DEVICE_API_VERSION_3_2:
642          case CAMERA_DEVICE_API_VERSION_3_3:
643            if (effectiveApiLevel == API_1) { // Camera1 API route
644                sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
645                *client = new Camera2Client(cameraService, tmp, packageName, id, facing,
646                        clientPid, clientUid, servicePid, legacyMode);
647            } else { // Camera2 API route
648                sp<ICameraDeviceCallbacks> tmp =
649                        static_cast<ICameraDeviceCallbacks*>(cameraCb.get());
650                *client = new CameraDeviceClient(cameraService, tmp, packageName, id,
651                        facing, clientPid, clientUid, servicePid);
652            }
653            break;
654          default:
655            // Should not be reachable
656            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
657            return INVALID_OPERATION;
658        }
659    } else {
660        // A particular HAL version is requested by caller. Create CameraClient
661        // based on the requested HAL version.
662        if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 &&
663            halVersion == CAMERA_DEVICE_API_VERSION_1_0) {
664            // Only support higher HAL version device opened as HAL1.0 device.
665            sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
666            *client = new CameraClient(cameraService, tmp, packageName, id, facing,
667                    clientPid, clientUid, servicePid, legacyMode);
668        } else {
669            // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet.
670            ALOGE("Invalid camera HAL version %x: HAL %x device can only be"
671                    " opened as HAL %x device", halVersion, deviceVersion,
672                    CAMERA_DEVICE_API_VERSION_1_0);
673            return INVALID_OPERATION;
674        }
675    }
676    return NO_ERROR;
677}
678
679String8 CameraService::toString(std::set<userid_t> intSet) {
680    String8 s("");
681    bool first = true;
682    for (userid_t i : intSet) {
683        if (first) {
684            s.appendFormat("%d", i);
685            first = false;
686        } else {
687            s.appendFormat(", %d", i);
688        }
689    }
690    return s;
691}
692
693status_t CameraService::initializeShimMetadata(int cameraId) {
694    int uid = getCallingUid();
695
696    String16 internalPackageName("media");
697    String8 id = String8::format("%d", cameraId);
698    status_t ret = NO_ERROR;
699    sp<Client> tmp = nullptr;
700    if ((ret = connectHelper<ICameraClient,Client>(sp<ICameraClient>{nullptr}, id,
701            static_cast<int>(CAMERA_HAL_API_VERSION_UNSPECIFIED), internalPackageName, uid, API_1,
702            false, true, tmp)) != NO_ERROR) {
703        ALOGE("%s: Error %d (%s) initializing shim metadata.", __FUNCTION__, ret, strerror(ret));
704        return ret;
705    }
706    return NO_ERROR;
707}
708
709status_t CameraService::getLegacyParametersLazy(int cameraId,
710        /*out*/
711        CameraParameters* parameters) {
712
713    ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId);
714
715    status_t ret = 0;
716
717    if (parameters == NULL) {
718        ALOGE("%s: parameters must not be null", __FUNCTION__);
719        return BAD_VALUE;
720    }
721
722    String8 id = String8::format("%d", cameraId);
723
724    // Check if we already have parameters
725    {
726        // Scope for service lock
727        Mutex::Autolock lock(mServiceLock);
728        auto cameraState = getCameraState(id);
729        if (cameraState == nullptr) {
730            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
731            return BAD_VALUE;
732        }
733        CameraParameters p = cameraState->getShimParams();
734        if (!p.isEmpty()) {
735            *parameters = p;
736            return NO_ERROR;
737        }
738    }
739
740    int64_t token = IPCThreadState::self()->clearCallingIdentity();
741    ret = initializeShimMetadata(cameraId);
742    IPCThreadState::self()->restoreCallingIdentity(token);
743    if (ret != NO_ERROR) {
744        // Error already logged by callee
745        return ret;
746    }
747
748    // Check for parameters again
749    {
750        // Scope for service lock
751        Mutex::Autolock lock(mServiceLock);
752        auto cameraState = getCameraState(id);
753        if (cameraState == nullptr) {
754            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
755            return BAD_VALUE;
756        }
757        CameraParameters p = cameraState->getShimParams();
758        if (!p.isEmpty()) {
759            *parameters = p;
760            return NO_ERROR;
761        }
762    }
763
764    ALOGE("%s: Parameters were not initialized, or were empty.  Device may not be present.",
765            __FUNCTION__);
766    return INVALID_OPERATION;
767}
768
769status_t CameraService::validateConnectLocked(const String8& cameraId, /*inout*/int& clientUid)
770        const {
771
772    int callingPid = getCallingPid();
773
774    if (clientUid == USE_CALLING_UID) {
775        clientUid = getCallingUid();
776    } else {
777        // We only trust our own process to forward client UIDs
778        if (callingPid != getpid()) {
779            ALOGE("CameraService::connect X (PID %d) rejected (don't trust clientUid %d)",
780                    callingPid, clientUid);
781            return PERMISSION_DENIED;
782        }
783    }
784
785    if (!mModule) {
786        ALOGE("CameraService::connect X (PID %d) rejected (camera HAL module not loaded)",
787                callingPid);
788        return -ENODEV;
789    }
790
791    if (getCameraState(cameraId) == nullptr) {
792        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
793                cameraId.string());
794        return -ENODEV;
795    }
796
797    // Check device policy for this camera
798    char value[PROPERTY_VALUE_MAX];
799    char key[PROPERTY_KEY_MAX];
800    userid_t clientUserId = multiuser_get_user_id(clientUid);
801    snprintf(key, PROPERTY_KEY_MAX, "sys.secpolicy.camera.off_%d", clientUserId);
802    property_get(key, value, "0");
803    if (strcmp(value, "1") == 0) {
804        // Camera is disabled by DevicePolicyManager.
805        ALOGE("CameraService::connect X (PID %d) rejected (camera %s is disabled by device "
806                "policy)", callingPid, cameraId.string());
807        return -EACCES;
808    }
809
810    // Only allow clients who are being used by the current foreground device user, unless calling
811    // from our own process.
812    if (callingPid != getpid() && (mAllowedUsers.find(clientUserId) == mAllowedUsers.end())) {
813        ALOGE("CameraService::connect X (PID %d) rejected (cannot connect from "
814                "device user %d, currently allowed device users: %s)", callingPid, clientUserId,
815                toString(mAllowedUsers).string());
816        return PERMISSION_DENIED;
817    }
818
819    return checkIfDeviceIsUsable(cameraId);
820}
821
822status_t CameraService::checkIfDeviceIsUsable(const String8& cameraId) const {
823    auto cameraState = getCameraState(cameraId);
824    int callingPid = getCallingPid();
825    if (cameraState == nullptr) {
826        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
827                cameraId.string());
828        return -ENODEV;
829    }
830
831    ICameraServiceListener::Status currentStatus = cameraState->getStatus();
832    if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
833        ALOGE("CameraService::connect X (PID %d) rejected (camera %s is not connected)",
834                callingPid, cameraId.string());
835        return -ENODEV;
836    } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
837        ALOGE("CameraService::connect X (PID %d) rejected, (camera %s is initializing)",
838                callingPid, cameraId.string());
839        return -EBUSY;
840    }
841
842    return NO_ERROR;
843}
844
845void CameraService::finishConnectLocked(const sp<BasicClient>& client,
846        const CameraService::DescriptorPtr& desc) {
847
848    // Make a descriptor for the incoming client
849    auto clientDescriptor = CameraService::CameraClientManager::makeClientDescriptor(client, desc);
850    auto evicted = mActiveClientManager.addAndEvict(clientDescriptor);
851
852    logConnected(desc->getKey(), static_cast<int>(desc->getOwnerId()),
853            String8(client->getPackageName()));
854
855    if (evicted.size() > 0) {
856        // This should never happen - clients should already have been removed in disconnect
857        for (auto& i : evicted) {
858            ALOGE("%s: Invalid state: Client for camera %s was not removed in disconnect",
859                    __FUNCTION__, i->getKey().string());
860        }
861
862        LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, clients not evicted properly",
863                __FUNCTION__);
864    }
865}
866
867status_t CameraService::handleEvictionsLocked(const String8& cameraId, int clientPid,
868        apiLevel effectiveApiLevel, const sp<IBinder>& remoteCallback, const String8& packageName,
869        /*out*/
870        sp<BasicClient>* client,
871        std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>* partial) {
872
873    status_t ret = NO_ERROR;
874    std::vector<DescriptorPtr> evictedClients;
875    DescriptorPtr clientDescriptor;
876    {
877        if (effectiveApiLevel == API_1) {
878            // If we are using API1, any existing client for this camera ID with the same remote
879            // should be returned rather than evicted to allow MediaRecorder to work properly.
880
881            auto current = mActiveClientManager.get(cameraId);
882            if (current != nullptr) {
883                auto clientSp = current->getValue();
884                if (clientSp.get() != nullptr) { // should never be needed
885                    if (!clientSp->canCastToApiClient(effectiveApiLevel)) {
886                        ALOGW("CameraService connect called from same client, but with a different"
887                                " API level, evicting prior client...");
888                    } else if (clientSp->getRemote() == remoteCallback) {
889                        ALOGI("CameraService::connect X (PID %d) (second call from same"
890                                " app binder, returning the same client)", clientPid);
891                        *client = clientSp;
892                        return NO_ERROR;
893                    }
894                }
895            }
896        }
897
898        // Return error if the device was unplugged or removed by the HAL for some reason
899        if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) {
900            return ret;
901        }
902
903        // Get current active client PIDs
904        std::vector<int> ownerPids(mActiveClientManager.getAllOwners());
905        ownerPids.push_back(clientPid);
906
907        // Use the value +PROCESS_STATE_NONEXISTENT, to avoid taking
908        // address of PROCESS_STATE_NONEXISTENT as a reference argument
909        // for the vector constructor. PROCESS_STATE_NONEXISTENT does
910        // not have an out-of-class definition.
911        std::vector<int> priorities(ownerPids.size(), +PROCESS_STATE_NONEXISTENT);
912
913        // Get priorites of all active PIDs
914        ProcessInfoService::getProcessStatesFromPids(ownerPids.size(), &ownerPids[0],
915                /*out*/&priorities[0]);
916
917        // Update all active clients' priorities
918        std::map<int,int> pidToPriorityMap;
919        for (size_t i = 0; i < ownerPids.size() - 1; i++) {
920            pidToPriorityMap.emplace(ownerPids[i], getCameraPriorityFromProcState(priorities[i]));
921        }
922        mActiveClientManager.updatePriorities(pidToPriorityMap);
923
924        // Get state for the given cameraId
925        auto state = getCameraState(cameraId);
926        if (state == nullptr) {
927            ALOGE("CameraService::connect X (PID %d) rejected (no camera device with ID %s)",
928                clientPid, cameraId.string());
929            return BAD_VALUE;
930        }
931
932        // Make descriptor for incoming client
933        clientDescriptor = CameraClientManager::makeClientDescriptor(cameraId,
934                sp<BasicClient>{nullptr}, static_cast<int32_t>(state->getCost()),
935                state->getConflicting(),
936                getCameraPriorityFromProcState(priorities[priorities.size() - 1]), clientPid);
937
938        // Find clients that would be evicted
939        auto evicted = mActiveClientManager.wouldEvict(clientDescriptor);
940
941        // If the incoming client was 'evicted,' higher priority clients have the camera in the
942        // background, so we cannot do evictions
943        if (std::find(evicted.begin(), evicted.end(), clientDescriptor) != evicted.end()) {
944            ALOGE("CameraService::connect X (PID %d) rejected (existing client(s) with higher"
945                    " priority).", clientPid);
946
947            sp<BasicClient> clientSp = clientDescriptor->getValue();
948            String8 curTime = getFormattedCurrentTime();
949            auto incompatibleClients =
950                    mActiveClientManager.getIncompatibleClients(clientDescriptor);
951
952            String8 msg = String8::format("%s : DENIED connect device %s client for package %s "
953                    "(PID %d, priority %d) due to eviction policy", curTime.string(),
954                    cameraId.string(), packageName.string(), clientPid,
955                    getCameraPriorityFromProcState(priorities[priorities.size() - 1]));
956
957            for (auto& i : incompatibleClients) {
958                msg.appendFormat("\n   - Blocked by existing device %s client for package %s"
959                        "(PID %" PRId32 ", priority %" PRId32 ")", i->getKey().string(),
960                        String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(),
961                        i->getPriority());
962            }
963
964            // Log the client's attempt
965            Mutex::Autolock l(mLogLock);
966            mEventLog.add(msg);
967
968            return -EBUSY;
969        }
970
971        for (auto& i : evicted) {
972            sp<BasicClient> clientSp = i->getValue();
973            if (clientSp.get() == nullptr) {
974                ALOGE("%s: Invalid state: Null client in active client list.", __FUNCTION__);
975
976                // TODO: Remove this
977                LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, null client in active list",
978                        __FUNCTION__);
979                mActiveClientManager.remove(i);
980                continue;
981            }
982
983            ALOGE("CameraService::connect evicting conflicting client for camera ID %s",
984                    i->getKey().string());
985            evictedClients.push_back(i);
986
987            // Log the clients evicted
988            logEvent(String8::format("EVICT device %s client held by package %s (PID"
989                    " %" PRId32 ", priority %" PRId32 ")\n   - Evicted by device %s client for"
990                    " package %s (PID %d, priority %" PRId32 ")",
991                    i->getKey().string(), String8{clientSp->getPackageName()}.string(),
992                    i->getOwnerId(), i->getPriority(), cameraId.string(),
993                    packageName.string(), clientPid,
994                    getCameraPriorityFromProcState(priorities[priorities.size() - 1])));
995
996            // Notify the client of disconnection
997            clientSp->notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
998                    CaptureResultExtras());
999        }
1000    }
1001
1002    // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1003    // other clients from connecting in mServiceLockWrapper if held
1004    mServiceLock.unlock();
1005
1006    // Clear caller identity temporarily so client disconnect PID checks work correctly
1007    int64_t token = IPCThreadState::self()->clearCallingIdentity();
1008
1009    // Destroy evicted clients
1010    for (auto& i : evictedClients) {
1011        // Disconnect is blocking, and should only have returned when HAL has cleaned up
1012        i->getValue()->disconnect(); // Clients will remove themselves from the active client list
1013    }
1014
1015    IPCThreadState::self()->restoreCallingIdentity(token);
1016
1017    for (const auto& i : evictedClients) {
1018        ALOGV("%s: Waiting for disconnect to complete for client for device %s (PID %" PRId32 ")",
1019                __FUNCTION__, i->getKey().string(), i->getOwnerId());
1020        ret = mActiveClientManager.waitUntilRemoved(i, DEFAULT_DISCONNECT_TIMEOUT_NS);
1021        if (ret == TIMED_OUT) {
1022            ALOGE("%s: Timed out waiting for client for device %s to disconnect, "
1023                    "current clients:\n%s", __FUNCTION__, i->getKey().string(),
1024                    mActiveClientManager.toString().string());
1025            return -EBUSY;
1026        }
1027        if (ret != NO_ERROR) {
1028            ALOGE("%s: Received error waiting for client for device %s to disconnect: %s (%d), "
1029                    "current clients:\n%s", __FUNCTION__, i->getKey().string(), strerror(-ret),
1030                    ret, mActiveClientManager.toString().string());
1031            return ret;
1032        }
1033    }
1034
1035    evictedClients.clear();
1036
1037    // Once clients have been disconnected, relock
1038    mServiceLock.lock();
1039
1040    // Check again if the device was unplugged or something while we weren't holding mServiceLock
1041    if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) {
1042        return ret;
1043    }
1044
1045    *partial = clientDescriptor;
1046    return NO_ERROR;
1047}
1048
1049status_t CameraService::connect(
1050        const sp<ICameraClient>& cameraClient,
1051        int cameraId,
1052        const String16& clientPackageName,
1053        int clientUid,
1054        /*out*/
1055        sp<ICamera>& device) {
1056
1057    status_t ret = NO_ERROR;
1058    String8 id = String8::format("%d", cameraId);
1059    sp<Client> client = nullptr;
1060    ret = connectHelper<ICameraClient,Client>(cameraClient, id, CAMERA_HAL_API_VERSION_UNSPECIFIED,
1061            clientPackageName, clientUid, API_1, false, false, /*out*/client);
1062
1063    if(ret != NO_ERROR) {
1064        logRejected(id, getCallingPid(), String8(clientPackageName),
1065                String8::format("%s (%d)", strerror(-ret), ret));
1066        return ret;
1067    }
1068
1069    device = client;
1070    return NO_ERROR;
1071}
1072
1073status_t CameraService::connectLegacy(
1074        const sp<ICameraClient>& cameraClient,
1075        int cameraId, int halVersion,
1076        const String16& clientPackageName,
1077        int clientUid,
1078        /*out*/
1079        sp<ICamera>& device) {
1080
1081    String8 id = String8::format("%d", cameraId);
1082    int apiVersion = mModule->getModuleApiVersion();
1083    if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED &&
1084            apiVersion < CAMERA_MODULE_API_VERSION_2_3) {
1085        /*
1086         * Either the HAL version is unspecified in which case this just creates
1087         * a camera client selected by the latest device version, or
1088         * it's a particular version in which case the HAL must supported
1089         * the open_legacy call
1090         */
1091        ALOGE("%s: camera HAL module version %x doesn't support connecting to legacy HAL devices!",
1092                __FUNCTION__, apiVersion);
1093        logRejected(id, getCallingPid(), String8(clientPackageName),
1094                String8("HAL module version doesn't support legacy HAL connections"));
1095        return INVALID_OPERATION;
1096    }
1097
1098    status_t ret = NO_ERROR;
1099    sp<Client> client = nullptr;
1100    ret = connectHelper<ICameraClient,Client>(cameraClient, id, halVersion, clientPackageName,
1101            clientUid, API_1, true, false, /*out*/client);
1102
1103    if(ret != NO_ERROR) {
1104        logRejected(id, getCallingPid(), String8(clientPackageName),
1105                String8::format("%s (%d)", strerror(-ret), ret));
1106        return ret;
1107    }
1108
1109    device = client;
1110    return NO_ERROR;
1111}
1112
1113status_t CameraService::connectDevice(
1114        const sp<ICameraDeviceCallbacks>& cameraCb,
1115        int cameraId,
1116        const String16& clientPackageName,
1117        int clientUid,
1118        /*out*/
1119        sp<ICameraDeviceUser>& device) {
1120
1121    status_t ret = NO_ERROR;
1122    String8 id = String8::format("%d", cameraId);
1123    sp<CameraDeviceClient> client = nullptr;
1124    ret = connectHelper<ICameraDeviceCallbacks,CameraDeviceClient>(cameraCb, id,
1125            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, clientUid, API_2, false, false,
1126            /*out*/client);
1127
1128    if(ret != NO_ERROR) {
1129        logRejected(id, getCallingPid(), String8(clientPackageName),
1130                String8::format("%s (%d)", strerror(-ret), ret));
1131        return ret;
1132    }
1133
1134    device = client;
1135    return NO_ERROR;
1136}
1137
1138status_t CameraService::setTorchMode(const String16& cameraId, bool enabled,
1139        const sp<IBinder>& clientBinder) {
1140    if (enabled && clientBinder == NULL) {
1141        ALOGE("%s: torch client binder is NULL", __FUNCTION__);
1142        return -EINVAL;
1143    }
1144
1145    String8 id = String8(cameraId.string());
1146
1147    // verify id is valid.
1148    auto state = getCameraState(id);
1149    if (state == nullptr) {
1150        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1151        return -EINVAL;
1152    }
1153
1154    ICameraServiceListener::Status cameraStatus = state->getStatus();
1155    if (cameraStatus != ICameraServiceListener::STATUS_PRESENT &&
1156            cameraStatus != ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1157        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1158        return -EINVAL;
1159    }
1160
1161    {
1162        Mutex::Autolock al(mTorchStatusMutex);
1163        ICameraServiceListener::TorchStatus status;
1164        status_t res = getTorchStatusLocked(id, &status);
1165        if (res) {
1166            ALOGE("%s: getting current torch status failed for camera %s",
1167                    __FUNCTION__, id.string());
1168            return -EINVAL;
1169        }
1170
1171        if (status == ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE) {
1172            if (cameraStatus == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1173                ALOGE("%s: torch mode of camera %s is not available because "
1174                        "camera is in use", __FUNCTION__, id.string());
1175                return -EBUSY;
1176            } else {
1177                ALOGE("%s: torch mode of camera %s is not available due to "
1178                        "insufficient resources", __FUNCTION__, id.string());
1179                return -EUSERS;
1180            }
1181        }
1182    }
1183
1184    status_t res = mFlashlight->setTorchMode(id, enabled);
1185    if (res) {
1186        ALOGE("%s: setting torch mode of camera %s to %d failed. %s (%d)",
1187                __FUNCTION__, id.string(), enabled, strerror(-res), res);
1188        return res;
1189    }
1190
1191    {
1192        // update the link to client's death
1193        Mutex::Autolock al(mTorchClientMapMutex);
1194        ssize_t index = mTorchClientMap.indexOfKey(id);
1195        if (enabled) {
1196            if (index == NAME_NOT_FOUND) {
1197                mTorchClientMap.add(id, clientBinder);
1198            } else {
1199                const sp<IBinder> oldBinder = mTorchClientMap.valueAt(index);
1200                oldBinder->unlinkToDeath(this);
1201
1202                mTorchClientMap.replaceValueAt(index, clientBinder);
1203            }
1204            clientBinder->linkToDeath(this);
1205        } else if (index != NAME_NOT_FOUND) {
1206            sp<IBinder> oldBinder = mTorchClientMap.valueAt(index);
1207            oldBinder->unlinkToDeath(this);
1208        }
1209    }
1210
1211    return OK;
1212}
1213
1214void CameraService::notifySystemEvent(int32_t eventId, const int32_t* args, size_t length) {
1215    switch(eventId) {
1216        case ICameraService::USER_SWITCHED: {
1217            doUserSwitch(/*newUserIds*/args, /*length*/length);
1218            break;
1219        }
1220        case ICameraService::NO_EVENT:
1221        default: {
1222            ALOGW("%s: Received invalid system event from system_server: %d", __FUNCTION__,
1223                    eventId);
1224            break;
1225        }
1226    }
1227}
1228
1229status_t CameraService::addListener(
1230                                const sp<ICameraServiceListener>& listener) {
1231    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
1232
1233    if (listener == 0) {
1234        ALOGE("%s: Listener must not be null", __FUNCTION__);
1235        return BAD_VALUE;
1236    }
1237
1238    Mutex::Autolock lock(mServiceLock);
1239
1240    {
1241        Mutex::Autolock lock(mStatusListenerLock);
1242        for (auto& it : mListenerList) {
1243            if (IInterface::asBinder(it) == IInterface::asBinder(listener)) {
1244                ALOGW("%s: Tried to add listener %p which was already subscribed",
1245                      __FUNCTION__, listener.get());
1246                return ALREADY_EXISTS;
1247            }
1248        }
1249
1250        mListenerList.push_back(listener);
1251    }
1252
1253
1254    /* Immediately signal current status to this listener only */
1255    {
1256        Mutex::Autolock lock(mCameraStatesLock);
1257        for (auto& i : mCameraStates) {
1258            // TODO: Update binder to use String16 for camera IDs and remove;
1259            int id = cameraIdToInt(i.first);
1260            if (id == -1) continue;
1261
1262            listener->onStatusChanged(i.second->getStatus(), id);
1263        }
1264    }
1265
1266    /* Immediately signal current torch status to this listener only */
1267    {
1268        Mutex::Autolock al(mTorchStatusMutex);
1269        for (size_t i = 0; i < mTorchStatusMap.size(); i++ ) {
1270            String16 id = String16(mTorchStatusMap.keyAt(i).string());
1271            listener->onTorchStatusChanged(mTorchStatusMap.valueAt(i), id);
1272        }
1273    }
1274
1275    return OK;
1276}
1277
1278status_t CameraService::removeListener(const sp<ICameraServiceListener>& listener) {
1279    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
1280
1281    if (listener == 0) {
1282        ALOGE("%s: Listener must not be null", __FUNCTION__);
1283        return BAD_VALUE;
1284    }
1285
1286    Mutex::Autolock lock(mServiceLock);
1287
1288    {
1289        Mutex::Autolock lock(mStatusListenerLock);
1290        for (auto it = mListenerList.begin(); it != mListenerList.end(); it++) {
1291            if (IInterface::asBinder(*it) == IInterface::asBinder(listener)) {
1292                mListenerList.erase(it);
1293                return OK;
1294            }
1295        }
1296    }
1297
1298    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
1299          __FUNCTION__, listener.get());
1300
1301    return BAD_VALUE;
1302}
1303
1304status_t CameraService::getLegacyParameters(int cameraId, /*out*/String16* parameters) {
1305    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1306
1307    if (parameters == NULL) {
1308        ALOGE("%s: parameters must not be null", __FUNCTION__);
1309        return BAD_VALUE;
1310    }
1311
1312    status_t ret = 0;
1313
1314    CameraParameters shimParams;
1315    if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) {
1316        // Error logged by caller
1317        return ret;
1318    }
1319
1320    String8 shimParamsString8 = shimParams.flatten();
1321    String16 shimParamsString16 = String16(shimParamsString8);
1322
1323    *parameters = shimParamsString16;
1324
1325    return OK;
1326}
1327
1328status_t CameraService::supportsCameraApi(int cameraId, int apiVersion) {
1329    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1330
1331    switch (apiVersion) {
1332        case API_VERSION_1:
1333        case API_VERSION_2:
1334            break;
1335        default:
1336            ALOGE("%s: Bad API version %d", __FUNCTION__, apiVersion);
1337            return BAD_VALUE;
1338    }
1339
1340    int facing = -1;
1341    int deviceVersion = getDeviceVersion(cameraId, &facing);
1342
1343    switch(deviceVersion) {
1344      case CAMERA_DEVICE_API_VERSION_1_0:
1345      case CAMERA_DEVICE_API_VERSION_2_0:
1346      case CAMERA_DEVICE_API_VERSION_2_1:
1347      case CAMERA_DEVICE_API_VERSION_3_0:
1348      case CAMERA_DEVICE_API_VERSION_3_1:
1349        if (apiVersion == API_VERSION_2) {
1350            ALOGV("%s: Camera id %d uses HAL prior to HAL3.2, doesn't support api2 without shim",
1351                    __FUNCTION__, cameraId);
1352            return -EOPNOTSUPP;
1353        } else { // if (apiVersion == API_VERSION_1) {
1354            ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported",
1355                    __FUNCTION__, cameraId);
1356            return OK;
1357        }
1358      case CAMERA_DEVICE_API_VERSION_3_2:
1359      case CAMERA_DEVICE_API_VERSION_3_3:
1360        ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly",
1361                __FUNCTION__, cameraId);
1362        return OK;
1363      case -1:
1364        ALOGE("%s: Invalid camera id %d", __FUNCTION__, cameraId);
1365        return BAD_VALUE;
1366      default:
1367        ALOGE("%s: Unknown camera device HAL version: %d", __FUNCTION__, deviceVersion);
1368        return INVALID_OPERATION;
1369    }
1370
1371    return OK;
1372}
1373
1374void CameraService::removeByClient(const BasicClient* client) {
1375    Mutex::Autolock lock(mServiceLock);
1376    for (auto& i : mActiveClientManager.getAll()) {
1377        auto clientSp = i->getValue();
1378        if (clientSp.get() == client) {
1379            mActiveClientManager.remove(i);
1380        }
1381    }
1382}
1383
1384bool CameraService::evictClientIdByRemote(const wp<IBinder>& remote) {
1385    const int callingPid = getCallingPid();
1386    const int servicePid = getpid();
1387    bool ret = false;
1388    {
1389        // Acquire mServiceLock and prevent other clients from connecting
1390        std::unique_ptr<AutoConditionLock> lock =
1391                AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1392
1393
1394        std::vector<sp<BasicClient>> evicted;
1395        for (auto& i : mActiveClientManager.getAll()) {
1396            auto clientSp = i->getValue();
1397            if (clientSp.get() == nullptr) {
1398                ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1399                mActiveClientManager.remove(i);
1400                continue;
1401            }
1402            if (remote == clientSp->getRemote() && (callingPid == servicePid ||
1403                    callingPid == clientSp->getClientPid())) {
1404                mActiveClientManager.remove(i);
1405                evicted.push_back(clientSp);
1406
1407                // Notify the client of disconnection
1408                clientSp->notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
1409                        CaptureResultExtras());
1410            }
1411        }
1412
1413        // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1414        // other clients from connecting in mServiceLockWrapper if held
1415        mServiceLock.unlock();
1416
1417        // Do not clear caller identity, remote caller should be client proccess
1418
1419        for (auto& i : evicted) {
1420            if (i.get() != nullptr) {
1421                i->disconnect();
1422                ret = true;
1423            }
1424        }
1425
1426        // Reacquire mServiceLock
1427        mServiceLock.lock();
1428
1429    } // lock is destroyed, allow further connect calls
1430
1431    return ret;
1432}
1433
1434
1435std::shared_ptr<CameraService::CameraState> CameraService::getCameraState(
1436        const String8& cameraId) const {
1437    std::shared_ptr<CameraState> state;
1438    {
1439        Mutex::Autolock lock(mCameraStatesLock);
1440        auto iter = mCameraStates.find(cameraId);
1441        if (iter != mCameraStates.end()) {
1442            state = iter->second;
1443        }
1444    }
1445    return state;
1446}
1447
1448sp<CameraService::BasicClient> CameraService::removeClientLocked(const String8& cameraId) {
1449    // Remove from active clients list
1450    auto clientDescriptorPtr = mActiveClientManager.remove(cameraId);
1451    if (clientDescriptorPtr == nullptr) {
1452        ALOGW("%s: Could not evict client, no client for camera ID %s", __FUNCTION__,
1453                cameraId.string());
1454        return sp<BasicClient>{nullptr};
1455    }
1456
1457    return clientDescriptorPtr->getValue();
1458}
1459
1460void CameraService::doUserSwitch(const int32_t* newUserId, size_t length) {
1461    // Acquire mServiceLock and prevent other clients from connecting
1462    std::unique_ptr<AutoConditionLock> lock =
1463            AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1464
1465    std::set<userid_t> newAllowedUsers;
1466    for (size_t i = 0; i < length; i++) {
1467        if (newUserId[i] < 0) {
1468            ALOGE("%s: Bad user ID %d given during user switch, ignoring.",
1469                    __FUNCTION__, newUserId[i]);
1470            return;
1471        }
1472        newAllowedUsers.insert(static_cast<userid_t>(newUserId[i]));
1473    }
1474
1475
1476    if (newAllowedUsers == mAllowedUsers) {
1477        ALOGW("%s: Received notification of user switch with no updated user IDs.", __FUNCTION__);
1478        return;
1479    }
1480
1481    logUserSwitch(mAllowedUsers, newAllowedUsers);
1482
1483    mAllowedUsers = std::move(newAllowedUsers);
1484
1485    // Current user has switched, evict all current clients.
1486    std::vector<sp<BasicClient>> evicted;
1487    for (auto& i : mActiveClientManager.getAll()) {
1488        auto clientSp = i->getValue();
1489
1490        if (clientSp.get() == nullptr) {
1491            ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1492            continue;
1493        }
1494
1495        // Don't evict clients that are still allowed.
1496        uid_t clientUid = clientSp->getClientUid();
1497        userid_t clientUserId = multiuser_get_user_id(clientUid);
1498        if (mAllowedUsers.find(clientUserId) != mAllowedUsers.end()) {
1499            continue;
1500        }
1501
1502        evicted.push_back(clientSp);
1503
1504        String8 curTime = getFormattedCurrentTime();
1505
1506        ALOGE("Evicting conflicting client for camera ID %s due to user change",
1507                i->getKey().string());
1508
1509        // Log the clients evicted
1510        logEvent(String8::format("EVICT device %s client held by package %s (PID %"
1511                PRId32 ", priority %" PRId32 ")\n   - Evicted due to user switch.",
1512                i->getKey().string(), String8{clientSp->getPackageName()}.string(),
1513                i->getOwnerId(), i->getPriority()));
1514
1515    }
1516
1517    // Do not hold mServiceLock while disconnecting clients, but retain the condition
1518    // blocking other clients from connecting in mServiceLockWrapper if held.
1519    mServiceLock.unlock();
1520
1521    // Clear caller identity temporarily so client disconnect PID checks work correctly
1522    int64_t token = IPCThreadState::self()->clearCallingIdentity();
1523
1524    for (auto& i : evicted) {
1525        i->disconnect();
1526    }
1527
1528    IPCThreadState::self()->restoreCallingIdentity(token);
1529
1530    // Reacquire mServiceLock
1531    mServiceLock.lock();
1532}
1533
1534void CameraService::logEvent(const char* event) {
1535    String8 curTime = getFormattedCurrentTime();
1536    Mutex::Autolock l(mLogLock);
1537    mEventLog.add(String8::format("%s : %s", curTime.string(), event));
1538}
1539
1540void CameraService::logDisconnected(const char* cameraId, int clientPid,
1541        const char* clientPackage) {
1542    // Log the clients evicted
1543    logEvent(String8::format("DISCONNECT device %s client for package %s (PID %d)", cameraId,
1544            clientPackage, clientPid));
1545}
1546
1547void CameraService::logConnected(const char* cameraId, int clientPid,
1548        const char* clientPackage) {
1549    // Log the clients evicted
1550    logEvent(String8::format("CONNECT device %s client for package %s (PID %d)", cameraId,
1551            clientPackage, clientPid));
1552}
1553
1554void CameraService::logRejected(const char* cameraId, int clientPid,
1555        const char* clientPackage, const char* reason) {
1556    // Log the client rejected
1557    logEvent(String8::format("REJECT device %s client for package %s (PID %d), reason: (%s)",
1558            cameraId, clientPackage, clientPid, reason));
1559}
1560
1561void CameraService::logUserSwitch(const std::set<userid_t>& oldUserIds,
1562        const std::set<userid_t>& newUserIds) {
1563    String8 newUsers = toString(newUserIds);
1564    String8 oldUsers = toString(oldUserIds);
1565    // Log the new and old users
1566    logEvent(String8::format("USER_SWITCH previous allowed users: %s , current allowed users: %s",
1567            oldUsers.string(), newUsers.string()));
1568}
1569
1570void CameraService::logDeviceRemoved(const char* cameraId, const char* reason) {
1571    // Log the device removal
1572    logEvent(String8::format("REMOVE device %s, reason: (%s)", cameraId, reason));
1573}
1574
1575void CameraService::logDeviceAdded(const char* cameraId, const char* reason) {
1576    // Log the device removal
1577    logEvent(String8::format("ADD device %s, reason: (%s)", cameraId, reason));
1578}
1579
1580void CameraService::logClientDied(int clientPid, const char* reason) {
1581    // Log the device removal
1582    logEvent(String8::format("DIED client(s) with PID %d, reason: (%s)", clientPid, reason));
1583}
1584
1585void CameraService::logServiceError(const char* msg, int errorCode) {
1586    String8 curTime = getFormattedCurrentTime();
1587    logEvent(String8::format("SERVICE ERROR: %s : %d (%s)", msg, errorCode, strerror(errorCode)));
1588}
1589
1590status_t CameraService::onTransact(uint32_t code, const Parcel& data, Parcel* reply,
1591        uint32_t flags) {
1592
1593    const int pid = getCallingPid();
1594    const int selfPid = getpid();
1595
1596    // Permission checks
1597    switch (code) {
1598        case BnCameraService::CONNECT:
1599        case BnCameraService::CONNECT_DEVICE:
1600        case BnCameraService::CONNECT_LEGACY: {
1601            if (pid != selfPid) {
1602                // we're called from a different process, do the real check
1603                if (!checkCallingPermission(
1604                        String16("android.permission.CAMERA"))) {
1605                    const int uid = getCallingUid();
1606                    ALOGE("Permission Denial: "
1607                         "can't use the camera pid=%d, uid=%d", pid, uid);
1608                    return PERMISSION_DENIED;
1609                }
1610            }
1611            break;
1612        }
1613        case BnCameraService::NOTIFY_SYSTEM_EVENT: {
1614            if (pid != selfPid) {
1615                // Ensure we're being called by system_server, or similar process with
1616                // permissions to notify the camera service about system events
1617                if (!checkCallingPermission(
1618                        String16("android.permission.CAMERA_SEND_SYSTEM_EVENTS"))) {
1619                    const int uid = getCallingUid();
1620                    ALOGE("Permission Denial: cannot send updates to camera service about system"
1621                            " events from pid=%d, uid=%d", pid, uid);
1622                    return PERMISSION_DENIED;
1623                }
1624            }
1625            break;
1626        }
1627    }
1628
1629    return BnCameraService::onTransact(code, data, reply, flags);
1630}
1631
1632// We share the media players for shutter and recording sound for all clients.
1633// A reference count is kept to determine when we will actually release the
1634// media players.
1635
1636MediaPlayer* CameraService::newMediaPlayer(const char *file) {
1637    MediaPlayer* mp = new MediaPlayer();
1638    if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) {
1639        mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
1640        mp->prepare();
1641    } else {
1642        ALOGE("Failed to load CameraService sounds: %s", file);
1643        return NULL;
1644    }
1645    return mp;
1646}
1647
1648void CameraService::loadSound() {
1649    Mutex::Autolock lock(mSoundLock);
1650    LOG1("CameraService::loadSound ref=%d", mSoundRef);
1651    if (mSoundRef++) return;
1652
1653    mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
1654    mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
1655}
1656
1657void CameraService::releaseSound() {
1658    Mutex::Autolock lock(mSoundLock);
1659    LOG1("CameraService::releaseSound ref=%d", mSoundRef);
1660    if (--mSoundRef) return;
1661
1662    for (int i = 0; i < NUM_SOUNDS; i++) {
1663        if (mSoundPlayer[i] != 0) {
1664            mSoundPlayer[i]->disconnect();
1665            mSoundPlayer[i].clear();
1666        }
1667    }
1668}
1669
1670void CameraService::playSound(sound_kind kind) {
1671    LOG1("playSound(%d)", kind);
1672    Mutex::Autolock lock(mSoundLock);
1673    sp<MediaPlayer> player = mSoundPlayer[kind];
1674    if (player != 0) {
1675        player->seekTo(0);
1676        player->start();
1677    }
1678}
1679
1680// ----------------------------------------------------------------------------
1681
1682CameraService::Client::Client(const sp<CameraService>& cameraService,
1683        const sp<ICameraClient>& cameraClient,
1684        const String16& clientPackageName,
1685        int cameraId, int cameraFacing,
1686        int clientPid, uid_t clientUid,
1687        int servicePid) :
1688        CameraService::BasicClient(cameraService,
1689                IInterface::asBinder(cameraClient),
1690                clientPackageName,
1691                cameraId, cameraFacing,
1692                clientPid, clientUid,
1693                servicePid)
1694{
1695    int callingPid = getCallingPid();
1696    LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
1697
1698    mRemoteCallback = cameraClient;
1699
1700    cameraService->loadSound();
1701
1702    LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
1703}
1704
1705// tear down the client
1706CameraService::Client::~Client() {
1707    ALOGV("~Client");
1708    mDestructionStarted = true;
1709
1710    mCameraService->releaseSound();
1711    // unconditionally disconnect. function is idempotent
1712    Client::disconnect();
1713}
1714
1715CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
1716        const sp<IBinder>& remoteCallback,
1717        const String16& clientPackageName,
1718        int cameraId, int cameraFacing,
1719        int clientPid, uid_t clientUid,
1720        int servicePid):
1721        mClientPackageName(clientPackageName), mDisconnected(false)
1722{
1723    mCameraService = cameraService;
1724    mRemoteBinder = remoteCallback;
1725    mCameraId = cameraId;
1726    mCameraFacing = cameraFacing;
1727    mClientPid = clientPid;
1728    mClientUid = clientUid;
1729    mServicePid = servicePid;
1730    mOpsActive = false;
1731    mDestructionStarted = false;
1732}
1733
1734CameraService::BasicClient::~BasicClient() {
1735    ALOGV("~BasicClient");
1736    mDestructionStarted = true;
1737}
1738
1739void CameraService::BasicClient::disconnect() {
1740    if (mDisconnected) {
1741        ALOGE("%s: Disconnect called on already disconnected client for device %d", __FUNCTION__,
1742                mCameraId);
1743        return;
1744    }
1745    mDisconnected = true;;
1746
1747    mCameraService->removeByClient(this);
1748    mCameraService->logDisconnected(String8::format("%d", mCameraId), mClientPid,
1749            String8(mClientPackageName));
1750
1751    sp<IBinder> remote = getRemote();
1752    if (remote != nullptr) {
1753        remote->unlinkToDeath(mCameraService);
1754    }
1755
1756    finishCameraOps();
1757    ALOGI("%s: Disconnected client for camera %d for PID %d", __FUNCTION__, mCameraId, mClientPid);
1758
1759    // client shouldn't be able to call into us anymore
1760    mClientPid = 0;
1761}
1762
1763String16 CameraService::BasicClient::getPackageName() const {
1764    return mClientPackageName;
1765}
1766
1767
1768int CameraService::BasicClient::getClientPid() const {
1769    return mClientPid;
1770}
1771
1772uid_t CameraService::BasicClient::getClientUid() const {
1773    return mClientUid;
1774}
1775
1776bool CameraService::BasicClient::canCastToApiClient(apiLevel level) const {
1777    // Defaults to API2.
1778    return level == API_2;
1779}
1780
1781status_t CameraService::BasicClient::startCameraOps() {
1782    int32_t res;
1783    // Notify app ops that the camera is not available
1784    mOpsCallback = new OpsCallback(this);
1785
1786    {
1787        ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
1788              __FUNCTION__, String8(mClientPackageName).string(), mClientUid);
1789    }
1790
1791    mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
1792            mClientPackageName, mOpsCallback);
1793    res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
1794            mClientUid, mClientPackageName);
1795
1796    if (res == AppOpsManager::MODE_ERRORED) {
1797        ALOGI("Camera %d: Access for \"%s\" has been revoked",
1798                mCameraId, String8(mClientPackageName).string());
1799        return PERMISSION_DENIED;
1800    }
1801
1802    if (res == AppOpsManager::MODE_IGNORED) {
1803        ALOGI("Camera %d: Access for \"%s\" has been restricted",
1804                mCameraId, String8(mClientPackageName).string());
1805        return INVALID_OPERATION;
1806    }
1807
1808    mOpsActive = true;
1809
1810    // Transition device availability listeners from PRESENT -> NOT_AVAILABLE
1811    mCameraService->updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
1812            String8::format("%d", mCameraId));
1813
1814    return OK;
1815}
1816
1817status_t CameraService::BasicClient::finishCameraOps() {
1818    // Check if startCameraOps succeeded, and if so, finish the camera op
1819    if (mOpsActive) {
1820        // Notify app ops that the camera is available again
1821        mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
1822                mClientPackageName);
1823        mOpsActive = false;
1824
1825        auto rejected = {ICameraServiceListener::STATUS_NOT_PRESENT,
1826                ICameraServiceListener::STATUS_ENUMERATING};
1827
1828        // Transition to PRESENT if the camera is not in either of the rejected states
1829        mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
1830                String8::format("%d", mCameraId), rejected);
1831
1832        // Notify flashlight that a camera device is closed.
1833        mCameraService->mFlashlight->deviceClosed(
1834                String8::format("%d", mCameraId));
1835    }
1836    // Always stop watching, even if no camera op is active
1837    if (mOpsCallback != NULL) {
1838        mAppOpsManager.stopWatchingMode(mOpsCallback);
1839    }
1840    mOpsCallback.clear();
1841
1842    return OK;
1843}
1844
1845void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
1846    String8 name(packageName);
1847    String8 myName(mClientPackageName);
1848
1849    if (op != AppOpsManager::OP_CAMERA) {
1850        ALOGW("Unexpected app ops notification received: %d", op);
1851        return;
1852    }
1853
1854    int32_t res;
1855    res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
1856            mClientUid, mClientPackageName);
1857    ALOGV("checkOp returns: %d, %s ", res,
1858            res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
1859            res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
1860            res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
1861            "UNKNOWN");
1862
1863    if (res != AppOpsManager::MODE_ALLOWED) {
1864        ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
1865                myName.string());
1866        // Reset the client PID to allow server-initiated disconnect,
1867        // and to prevent further calls by client.
1868        mClientPid = getCallingPid();
1869        CaptureResultExtras resultExtras; // a dummy result (invalid)
1870        notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras);
1871        disconnect();
1872    }
1873}
1874
1875// ----------------------------------------------------------------------------
1876
1877// Provide client strong pointer for callbacks.
1878sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) {
1879    String8 cameraId = String8::format("%d", (int)(intptr_t) user);
1880    auto clientDescriptor = gCameraService->mActiveClientManager.get(cameraId);
1881    if (clientDescriptor != nullptr) {
1882        return sp<Client>{
1883                static_cast<Client*>(clientDescriptor->getValue().get())};
1884    }
1885    return sp<Client>{nullptr};
1886}
1887
1888void CameraService::Client::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1889        const CaptureResultExtras& resultExtras) {
1890    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1891}
1892
1893// NOTE: function is idempotent
1894void CameraService::Client::disconnect() {
1895    ALOGV("Client::disconnect");
1896    BasicClient::disconnect();
1897}
1898
1899bool CameraService::Client::canCastToApiClient(apiLevel level) const {
1900    return level == API_1;
1901}
1902
1903CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
1904        mClient(client) {
1905}
1906
1907void CameraService::Client::OpsCallback::opChanged(int32_t op,
1908        const String16& packageName) {
1909    sp<BasicClient> client = mClient.promote();
1910    if (client != NULL) {
1911        client->opChanged(op, packageName);
1912    }
1913}
1914
1915// ----------------------------------------------------------------------------
1916//                  CameraState
1917// ----------------------------------------------------------------------------
1918
1919CameraService::CameraState::CameraState(const String8& id, int cost,
1920        const std::set<String8>& conflicting) : mId(id),
1921        mStatus(ICameraServiceListener::STATUS_PRESENT), mCost(cost), mConflicting(conflicting) {}
1922
1923CameraService::CameraState::~CameraState() {}
1924
1925ICameraServiceListener::Status CameraService::CameraState::getStatus() const {
1926    Mutex::Autolock lock(mStatusLock);
1927    return mStatus;
1928}
1929
1930CameraParameters CameraService::CameraState::getShimParams() const {
1931    return mShimParams;
1932}
1933
1934void CameraService::CameraState::setShimParams(const CameraParameters& params) {
1935    mShimParams = params;
1936}
1937
1938int CameraService::CameraState::getCost() const {
1939    return mCost;
1940}
1941
1942std::set<String8> CameraService::CameraState::getConflicting() const {
1943    return mConflicting;
1944}
1945
1946String8 CameraService::CameraState::getId() const {
1947    return mId;
1948}
1949
1950// ----------------------------------------------------------------------------
1951//                  CameraClientManager
1952// ----------------------------------------------------------------------------
1953
1954CameraService::CameraClientManager::~CameraClientManager() {}
1955
1956sp<CameraService::BasicClient> CameraService::CameraClientManager::getCameraClient(
1957        const String8& id) const {
1958    auto descriptor = get(id);
1959    if (descriptor == nullptr) {
1960        return sp<BasicClient>{nullptr};
1961    }
1962    return descriptor->getValue();
1963}
1964
1965String8 CameraService::CameraClientManager::toString() const {
1966    auto all = getAll();
1967    String8 ret("[");
1968    bool hasAny = false;
1969    for (auto& i : all) {
1970        hasAny = true;
1971        String8 key = i->getKey();
1972        int32_t cost = i->getCost();
1973        int32_t pid = i->getOwnerId();
1974        int32_t priority = i->getPriority();
1975        auto conflicting = i->getConflicting();
1976        auto clientSp = i->getValue();
1977        String8 packageName;
1978        userid_t clientUserId;
1979        if (clientSp.get() != nullptr) {
1980            packageName = String8{clientSp->getPackageName()};
1981            uid_t clientUid = clientSp->getClientUid();
1982            clientUserId = multiuser_get_user_id(clientUid);
1983        }
1984        ret.appendFormat("\n(Camera ID: %s, Cost: %" PRId32 ", PID: %" PRId32 ", Priority: %"
1985                PRId32 ", ", key.string(), cost, pid, priority);
1986
1987        if (clientSp.get() != nullptr) {
1988            ret.appendFormat("User Id: %d, ", clientUserId);
1989        }
1990        if (packageName.size() != 0) {
1991            ret.appendFormat("Client Package Name: %s", packageName.string());
1992        }
1993
1994        ret.append(", Conflicting Client Devices: {");
1995        for (auto& j : conflicting) {
1996            ret.appendFormat("%s, ", j.string());
1997        }
1998        ret.append("})");
1999    }
2000    if (hasAny) ret.append("\n");
2001    ret.append("]\n");
2002    return ret;
2003}
2004
2005CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor(
2006        const String8& key, const sp<BasicClient>& value, int32_t cost,
2007        const std::set<String8>& conflictingKeys, int32_t priority, int32_t ownerId) {
2008
2009    return std::make_shared<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>(
2010            key, value, cost, conflictingKeys, priority, ownerId);
2011}
2012
2013CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor(
2014        const sp<BasicClient>& value, const CameraService::DescriptorPtr& partial) {
2015    return makeClientDescriptor(partial->getKey(), value, partial->getCost(),
2016            partial->getConflicting(), partial->getPriority(), partial->getOwnerId());
2017}
2018
2019// ----------------------------------------------------------------------------
2020
2021static const int kDumpLockRetries = 50;
2022static const int kDumpLockSleep = 60000;
2023
2024static bool tryLock(Mutex& mutex)
2025{
2026    bool locked = false;
2027    for (int i = 0; i < kDumpLockRetries; ++i) {
2028        if (mutex.tryLock() == NO_ERROR) {
2029            locked = true;
2030            break;
2031        }
2032        usleep(kDumpLockSleep);
2033    }
2034    return locked;
2035}
2036
2037status_t CameraService::dump(int fd, const Vector<String16>& args) {
2038    String8 result("Dump of the Camera Service:\n");
2039    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
2040        result.appendFormat("Permission Denial: "
2041                "can't dump CameraService from pid=%d, uid=%d\n",
2042                getCallingPid(),
2043                getCallingUid());
2044        write(fd, result.string(), result.size());
2045    } else {
2046        bool locked = tryLock(mServiceLock);
2047        // failed to lock - CameraService is probably deadlocked
2048        if (!locked) {
2049            result.append("CameraService may be deadlocked\n");
2050            write(fd, result.string(), result.size());
2051        }
2052
2053        bool hasClient = false;
2054        if (!mModule) {
2055            result = String8::format("No camera module available!\n");
2056            write(fd, result.string(), result.size());
2057
2058            // Dump event log for error information
2059            dumpEventLog(fd);
2060
2061            if (locked) mServiceLock.unlock();
2062            return NO_ERROR;
2063        }
2064
2065        result = String8::format("Camera module HAL API version: 0x%x\n", mModule->getHalApiVersion());
2066        result.appendFormat("Camera module API version: 0x%x\n", mModule->getModuleApiVersion());
2067        result.appendFormat("Camera module name: %s\n", mModule->getModuleName());
2068        result.appendFormat("Camera module author: %s\n", mModule->getModuleAuthor());
2069        result.appendFormat("Number of camera devices: %d\n", mNumberOfCameras);
2070        String8 activeClientString = mActiveClientManager.toString();
2071        result.appendFormat("Active Camera Clients:\n%s", activeClientString.string());
2072        result.appendFormat("Allowed users:\n%s\n", toString(mAllowedUsers).string());
2073
2074        sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
2075        if (desc == NULL) {
2076            result.appendFormat("Vendor tags left unimplemented.\n");
2077        } else {
2078            result.appendFormat("Vendor tag definitions:\n");
2079        }
2080
2081        write(fd, result.string(), result.size());
2082
2083        if (desc != NULL) {
2084            desc->dump(fd, /*verbosity*/2, /*indentation*/4);
2085        }
2086
2087        dumpEventLog(fd);
2088
2089        bool stateLocked = tryLock(mCameraStatesLock);
2090        if (!stateLocked) {
2091            result = String8::format("CameraStates in use, may be deadlocked\n");
2092            write(fd, result.string(), result.size());
2093        }
2094
2095        for (auto& state : mCameraStates) {
2096            String8 cameraId = state.first;
2097            result = String8::format("Camera %s information:\n", cameraId.string());
2098            camera_info info;
2099
2100            // TODO: Change getCameraInfo + HAL to use String cameraIds
2101            status_t rc = mModule->getCameraInfo(cameraIdToInt(cameraId), &info);
2102            if (rc != OK) {
2103                result.appendFormat("  Error reading static information!\n");
2104                write(fd, result.string(), result.size());
2105            } else {
2106                result.appendFormat("  Facing: %s\n",
2107                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
2108                result.appendFormat("  Orientation: %d\n", info.orientation);
2109                int deviceVersion;
2110                if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0) {
2111                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
2112                } else {
2113                    deviceVersion = info.device_version;
2114                }
2115
2116                auto conflicting = state.second->getConflicting();
2117                result.appendFormat("  Resource Cost: %d\n", state.second->getCost());
2118                result.appendFormat("  Conflicting Devices:");
2119                for (auto& id : conflicting) {
2120                    result.appendFormat(" %s", cameraId.string());
2121                }
2122                if (conflicting.size() == 0) {
2123                    result.appendFormat(" NONE");
2124                }
2125                result.appendFormat("\n");
2126
2127                result.appendFormat("  Device version: %#x\n", deviceVersion);
2128                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
2129                    result.appendFormat("  Device static metadata:\n");
2130                    write(fd, result.string(), result.size());
2131                    dump_indented_camera_metadata(info.static_camera_characteristics,
2132                            fd, /*verbosity*/2, /*indentation*/4);
2133                } else {
2134                    write(fd, result.string(), result.size());
2135                }
2136
2137                CameraParameters p = state.second->getShimParams();
2138                if (!p.isEmpty()) {
2139                    result = String8::format("  Camera1 API shim is using parameters:\n        ");
2140                    write(fd, result.string(), result.size());
2141                    p.dump(fd, args);
2142                }
2143            }
2144
2145            auto clientDescriptor = mActiveClientManager.get(cameraId);
2146            if (clientDescriptor == nullptr) {
2147                result = String8::format("  Device %s is closed, no client instance\n",
2148                        cameraId.string());
2149                write(fd, result.string(), result.size());
2150                continue;
2151            }
2152            hasClient = true;
2153            result = String8::format("  Device %s is open. Client instance dump:\n\n",
2154                    cameraId.string());
2155            result.appendFormat("Client priority level: %d\n", clientDescriptor->getPriority());
2156            result.appendFormat("Client PID: %d\n", clientDescriptor->getOwnerId());
2157
2158            auto client = clientDescriptor->getValue();
2159            result.appendFormat("Client package: %s\n",
2160                    String8(client->getPackageName()).string());
2161            write(fd, result.string(), result.size());
2162
2163            client->dump(fd, args);
2164        }
2165
2166        if (stateLocked) mCameraStatesLock.unlock();
2167
2168        if (!hasClient) {
2169            result = String8::format("\nNo active camera clients yet.\n");
2170            write(fd, result.string(), result.size());
2171        }
2172
2173        if (locked) mServiceLock.unlock();
2174
2175        // Dump camera traces if there were any
2176        write(fd, "\n", 1);
2177        camera3::CameraTraces::dump(fd, args);
2178
2179        // change logging level
2180        int n = args.size();
2181        for (int i = 0; i + 1 < n; i++) {
2182            String16 verboseOption("-v");
2183            if (args[i] == verboseOption) {
2184                String8 levelStr(args[i+1]);
2185                int level = atoi(levelStr.string());
2186                result = String8::format("\nSetting log level to %d.\n", level);
2187                setLogLevel(level);
2188                write(fd, result.string(), result.size());
2189            }
2190        }
2191    }
2192    return NO_ERROR;
2193}
2194
2195void CameraService::dumpEventLog(int fd) {
2196    String8 result = String8("\nPrior client events (most recent at top):\n");
2197
2198    Mutex::Autolock l(mLogLock);
2199    for (const auto& msg : mEventLog) {
2200        result.appendFormat("  %s\n", msg.string());
2201    }
2202
2203    if (mEventLog.size() == DEFAULT_EVENT_LOG_LENGTH) {
2204        result.append("  ...\n");
2205    } else if (mEventLog.size() == 0) {
2206        result.append("  [no events yet]\n");
2207    }
2208    result.append("\n");
2209
2210    write(fd, result.string(), result.size());
2211}
2212
2213void CameraService::handleTorchClientBinderDied(const wp<IBinder> &who) {
2214    Mutex::Autolock al(mTorchClientMapMutex);
2215    for (size_t i = 0; i < mTorchClientMap.size(); i++) {
2216        if (mTorchClientMap[i] == who) {
2217            // turn off the torch mode that was turned on by dead client
2218            String8 cameraId = mTorchClientMap.keyAt(i);
2219            status_t res = mFlashlight->setTorchMode(cameraId, false);
2220            if (res) {
2221                ALOGE("%s: torch client died but couldn't turn off torch: "
2222                    "%s (%d)", __FUNCTION__, strerror(-res), res);
2223                return;
2224            }
2225            mTorchClientMap.removeItemsAt(i);
2226            break;
2227        }
2228    }
2229}
2230
2231/*virtual*/void CameraService::binderDied(const wp<IBinder> &who) {
2232
2233    /**
2234      * While tempting to promote the wp<IBinder> into a sp, it's actually not supported by the
2235      * binder driver
2236      */
2237
2238    logClientDied(getCallingPid(), String8("Binder died unexpectedly"));
2239
2240    // check torch client
2241    handleTorchClientBinderDied(who);
2242
2243    // check camera device client
2244    if(!evictClientIdByRemote(who)) {
2245        ALOGV("%s: Java client's binder death already cleaned up (normal case)", __FUNCTION__);
2246        return;
2247    }
2248
2249    ALOGE("%s: Java client's binder died, removing it from the list of active clients",
2250            __FUNCTION__);
2251}
2252
2253void CameraService::updateStatus(ICameraServiceListener::Status status, const String8& cameraId) {
2254    updateStatus(status, cameraId, {});
2255}
2256
2257void CameraService::updateStatus(ICameraServiceListener::Status status, const String8& cameraId,
2258        std::initializer_list<ICameraServiceListener::Status> rejectSourceStates) {
2259    // Do not lock mServiceLock here or can get into a deadlock from
2260    // connect() -> disconnect -> updateStatus
2261
2262    auto state = getCameraState(cameraId);
2263
2264    if (state == nullptr) {
2265        ALOGW("%s: Could not update the status for %s, no such device exists", __FUNCTION__,
2266                cameraId.string());
2267        return;
2268    }
2269
2270    // Update the status for this camera state, then send the onStatusChangedCallbacks to each
2271    // of the listeners with both the mStatusStatus and mStatusListenerLock held
2272    state->updateStatus(status, cameraId, rejectSourceStates, [this]
2273            (const String8& cameraId, ICameraServiceListener::Status status) {
2274
2275            if (status != ICameraServiceListener::STATUS_ENUMERATING) {
2276                // Update torch status if it has a flash unit.
2277                Mutex::Autolock al(mTorchStatusMutex);
2278                ICameraServiceListener::TorchStatus torchStatus;
2279                if (getTorchStatusLocked(cameraId, &torchStatus) !=
2280                        NAME_NOT_FOUND) {
2281                    ICameraServiceListener::TorchStatus newTorchStatus =
2282                            status == ICameraServiceListener::STATUS_PRESENT ?
2283                            ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF :
2284                            ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE;
2285                    if (torchStatus != newTorchStatus) {
2286                        onTorchStatusChangedLocked(cameraId, newTorchStatus);
2287                    }
2288                }
2289            }
2290
2291            Mutex::Autolock lock(mStatusListenerLock);
2292
2293            for (auto& listener : mListenerList) {
2294                // TODO: Refactor status listeners to use strings for Camera IDs and remove this.
2295                int id = cameraIdToInt(cameraId);
2296                if (id != -1) listener->onStatusChanged(status, id);
2297            }
2298        });
2299}
2300
2301status_t CameraService::getTorchStatusLocked(
2302        const String8& cameraId,
2303        ICameraServiceListener::TorchStatus *status) const {
2304    if (!status) {
2305        return BAD_VALUE;
2306    }
2307    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2308    if (index == NAME_NOT_FOUND) {
2309        // invalid camera ID or the camera doesn't have a flash unit
2310        return NAME_NOT_FOUND;
2311    }
2312
2313    *status = mTorchStatusMap.valueAt(index);
2314    return OK;
2315}
2316
2317status_t CameraService::setTorchStatusLocked(const String8& cameraId,
2318        ICameraServiceListener::TorchStatus status) {
2319    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2320    if (index == NAME_NOT_FOUND) {
2321        return BAD_VALUE;
2322    }
2323    ICameraServiceListener::TorchStatus& item =
2324            mTorchStatusMap.editValueAt(index);
2325    item = status;
2326
2327    return OK;
2328}
2329
2330}; // namespace android
2331