CameraService.cpp revision 2882bb9a94bba6477552e7f696984e8e1ce052ff 
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),
126        mLastUserId(DEFAULT_LAST_USER_ID), 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
679status_t CameraService::initializeShimMetadata(int cameraId) {
680    int uid = getCallingUid();
681
682    String16 internalPackageName("media");
683    String8 id = String8::format("%d", cameraId);
684    status_t ret = NO_ERROR;
685    sp<Client> tmp = nullptr;
686    if ((ret = connectHelper<ICameraClient,Client>(sp<ICameraClient>{nullptr}, id,
687            static_cast<int>(CAMERA_HAL_API_VERSION_UNSPECIFIED), internalPackageName, uid, API_1,
688            false, true, tmp)) != NO_ERROR) {
689        ALOGE("%s: Error %d (%s) initializing shim metadata.", __FUNCTION__, ret, strerror(ret));
690        return ret;
691    }
692    return NO_ERROR;
693}
694
695status_t CameraService::getLegacyParametersLazy(int cameraId,
696        /*out*/
697        CameraParameters* parameters) {
698
699    ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId);
700
701    status_t ret = 0;
702
703    if (parameters == NULL) {
704        ALOGE("%s: parameters must not be null", __FUNCTION__);
705        return BAD_VALUE;
706    }
707
708    String8 id = String8::format("%d", cameraId);
709
710    // Check if we already have parameters
711    {
712        // Scope for service lock
713        Mutex::Autolock lock(mServiceLock);
714        auto cameraState = getCameraState(id);
715        if (cameraState == nullptr) {
716            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
717            return BAD_VALUE;
718        }
719        CameraParameters p = cameraState->getShimParams();
720        if (!p.isEmpty()) {
721            *parameters = p;
722            return NO_ERROR;
723        }
724    }
725
726    int64_t token = IPCThreadState::self()->clearCallingIdentity();
727    ret = initializeShimMetadata(cameraId);
728    IPCThreadState::self()->restoreCallingIdentity(token);
729    if (ret != NO_ERROR) {
730        // Error already logged by callee
731        return ret;
732    }
733
734    // Check for parameters again
735    {
736        // Scope for service lock
737        Mutex::Autolock lock(mServiceLock);
738        auto cameraState = getCameraState(id);
739        if (cameraState == nullptr) {
740            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
741            return BAD_VALUE;
742        }
743        CameraParameters p = cameraState->getShimParams();
744        if (!p.isEmpty()) {
745            *parameters = p;
746            return NO_ERROR;
747        }
748    }
749
750    ALOGE("%s: Parameters were not initialized, or were empty.  Device may not be present.",
751            __FUNCTION__);
752    return INVALID_OPERATION;
753}
754
755status_t CameraService::validateConnectLocked(const String8& cameraId, /*inout*/int& clientUid)
756        const {
757
758    int callingPid = getCallingPid();
759
760    if (clientUid == USE_CALLING_UID) {
761        clientUid = getCallingUid();
762    } else {
763        // We only trust our own process to forward client UIDs
764        if (callingPid != getpid()) {
765            ALOGE("CameraService::connect X (PID %d) rejected (don't trust clientUid %d)",
766                    callingPid, clientUid);
767            return PERMISSION_DENIED;
768        }
769    }
770
771    if (!mModule) {
772        ALOGE("CameraService::connect X (PID %d) rejected (camera HAL module not loaded)",
773                callingPid);
774        return -ENODEV;
775    }
776
777    if (getCameraState(cameraId) == nullptr) {
778        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
779                cameraId.string());
780        return -ENODEV;
781    }
782
783    // Check device policy for this camera
784    char value[PROPERTY_VALUE_MAX];
785    char key[PROPERTY_KEY_MAX];
786    int clientUserId = multiuser_get_user_id(clientUid);
787    snprintf(key, PROPERTY_KEY_MAX, "sys.secpolicy.camera.off_%d", clientUserId);
788    property_get(key, value, "0");
789    if (strcmp(value, "1") == 0) {
790        // Camera is disabled by DevicePolicyManager.
791        ALOGE("CameraService::connect X (PID %d) rejected (camera %s is disabled by device "
792                "policy)", callingPid, cameraId.string());
793        return -EACCES;
794    }
795
796    // Only allow clients who are being used by the current foreground device user, unless calling
797    // from our own process.
798    if (callingPid != getpid() &&
799            (mLastUserId != clientUserId && mLastUserId != DEFAULT_LAST_USER_ID)) {
800        ALOGE("CameraService::connect X (PID %d) rejected (cannot connect from previous "
801                "device user %d, current device user %d)", callingPid, clientUserId, mLastUserId);
802        return PERMISSION_DENIED;
803    }
804
805    return checkIfDeviceIsUsable(cameraId);
806}
807
808status_t CameraService::checkIfDeviceIsUsable(const String8& cameraId) const {
809    auto cameraState = getCameraState(cameraId);
810    int callingPid = getCallingPid();
811    if (cameraState == nullptr) {
812        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
813                cameraId.string());
814        return -ENODEV;
815    }
816
817    ICameraServiceListener::Status currentStatus = cameraState->getStatus();
818    if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
819        ALOGE("CameraService::connect X (PID %d) rejected (camera %s is not connected)",
820                callingPid, cameraId.string());
821        return -ENODEV;
822    } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
823        ALOGE("CameraService::connect X (PID %d) rejected, (camera %s is initializing)",
824                callingPid, cameraId.string());
825        return -EBUSY;
826    }
827
828    return NO_ERROR;
829}
830
831void CameraService::finishConnectLocked(const sp<BasicClient>& client,
832        const CameraService::DescriptorPtr& desc) {
833
834    // Make a descriptor for the incoming client
835    auto clientDescriptor = CameraService::CameraClientManager::makeClientDescriptor(client, desc);
836    auto evicted = mActiveClientManager.addAndEvict(clientDescriptor);
837
838    logConnected(desc->getKey(), static_cast<int>(desc->getOwnerId()),
839            String8(client->getPackageName()));
840
841    if (evicted.size() > 0) {
842        // This should never happen - clients should already have been removed in disconnect
843        for (auto& i : evicted) {
844            ALOGE("%s: Invalid state: Client for camera %s was not removed in disconnect",
845                    __FUNCTION__, i->getKey().string());
846        }
847
848        LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, clients not evicted properly",
849                __FUNCTION__);
850    }
851}
852
853status_t CameraService::handleEvictionsLocked(const String8& cameraId, int clientPid,
854        apiLevel effectiveApiLevel, const sp<IBinder>& remoteCallback, const String8& packageName,
855        /*out*/
856        sp<BasicClient>* client,
857        std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>* partial) {
858
859    status_t ret = NO_ERROR;
860    std::vector<DescriptorPtr> evictedClients;
861    DescriptorPtr clientDescriptor;
862    {
863        if (effectiveApiLevel == API_1) {
864            // If we are using API1, any existing client for this camera ID with the same remote
865            // should be returned rather than evicted to allow MediaRecorder to work properly.
866
867            auto current = mActiveClientManager.get(cameraId);
868            if (current != nullptr) {
869                auto clientSp = current->getValue();
870                if (clientSp.get() != nullptr) { // should never be needed
871                    if (!clientSp->canCastToApiClient(effectiveApiLevel)) {
872                        ALOGW("CameraService connect called from same client, but with a different"
873                                " API level, evicting prior client...");
874                    } else if (clientSp->getRemote() == remoteCallback) {
875                        ALOGI("CameraService::connect X (PID %d) (second call from same"
876                                " app binder, returning the same client)", clientPid);
877                        *client = clientSp;
878                        return NO_ERROR;
879                    }
880                }
881            }
882        }
883
884        // Return error if the device was unplugged or removed by the HAL for some reason
885        if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) {
886            return ret;
887        }
888
889        // Get current active client PIDs
890        std::vector<int> ownerPids(mActiveClientManager.getAllOwners());
891        ownerPids.push_back(clientPid);
892
893        // Use the value +PROCESS_STATE_NONEXISTENT, to avoid taking
894        // address of PROCESS_STATE_NONEXISTENT as a reference argument
895        // for the vector constructor. PROCESS_STATE_NONEXISTENT does
896        // not have an out-of-class definition.
897        std::vector<int> priorities(ownerPids.size(), +PROCESS_STATE_NONEXISTENT);
898
899        // Get priorites of all active PIDs
900        ProcessInfoService::getProcessStatesFromPids(ownerPids.size(), &ownerPids[0],
901                /*out*/&priorities[0]);
902
903        // Update all active clients' priorities
904        std::map<int,int> pidToPriorityMap;
905        for (size_t i = 0; i < ownerPids.size() - 1; i++) {
906            pidToPriorityMap.emplace(ownerPids[i], getCameraPriorityFromProcState(priorities[i]));
907        }
908        mActiveClientManager.updatePriorities(pidToPriorityMap);
909
910        // Get state for the given cameraId
911        auto state = getCameraState(cameraId);
912        if (state == nullptr) {
913            ALOGE("CameraService::connect X (PID %d) rejected (no camera device with ID %s)",
914                clientPid, cameraId.string());
915            return BAD_VALUE;
916        }
917
918        // Make descriptor for incoming client
919        clientDescriptor = CameraClientManager::makeClientDescriptor(cameraId,
920                sp<BasicClient>{nullptr}, static_cast<int32_t>(state->getCost()),
921                state->getConflicting(),
922                getCameraPriorityFromProcState(priorities[priorities.size() - 1]), clientPid);
923
924        // Find clients that would be evicted
925        auto evicted = mActiveClientManager.wouldEvict(clientDescriptor);
926
927        // If the incoming client was 'evicted,' higher priority clients have the camera in the
928        // background, so we cannot do evictions
929        if (std::find(evicted.begin(), evicted.end(), clientDescriptor) != evicted.end()) {
930            ALOGE("CameraService::connect X (PID %d) rejected (existing client(s) with higher"
931                    " priority).", clientPid);
932
933            sp<BasicClient> clientSp = clientDescriptor->getValue();
934            String8 curTime = getFormattedCurrentTime();
935            auto incompatibleClients =
936                    mActiveClientManager.getIncompatibleClients(clientDescriptor);
937
938            String8 msg = String8::format("%s : DENIED connect device %s client for package %s "
939                    "(PID %d, priority %d) due to eviction policy", curTime.string(),
940                    cameraId.string(), packageName.string(), clientPid,
941                    getCameraPriorityFromProcState(priorities[priorities.size() - 1]));
942
943            for (auto& i : incompatibleClients) {
944                msg.appendFormat("\n   - Blocked by existing device %s client for package %s"
945                        "(PID %" PRId32 ", priority %" PRId32 ")", i->getKey().string(),
946                        String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(),
947                        i->getPriority());
948            }
949
950            // Log the client's attempt
951            Mutex::Autolock l(mLogLock);
952            mEventLog.add(msg);
953
954            return -EBUSY;
955        }
956
957        for (auto& i : evicted) {
958            sp<BasicClient> clientSp = i->getValue();
959            if (clientSp.get() == nullptr) {
960                ALOGE("%s: Invalid state: Null client in active client list.", __FUNCTION__);
961
962                // TODO: Remove this
963                LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, null client in active list",
964                        __FUNCTION__);
965                mActiveClientManager.remove(i);
966                continue;
967            }
968
969            ALOGE("CameraService::connect evicting conflicting client for camera ID %s",
970                    i->getKey().string());
971            evictedClients.push_back(i);
972
973            // Log the clients evicted
974            logEvent(String8::format("EVICT device %s client held by package %s (PID"
975                    " %" PRId32 ", priority %" PRId32 ")\n   - Evicted by device %s client for"
976                    " package %s (PID %d, priority %" PRId32 ")",
977                    i->getKey().string(), String8{clientSp->getPackageName()}.string(),
978                    i->getOwnerId(), i->getPriority(), cameraId.string(),
979                    packageName.string(), clientPid,
980                    getCameraPriorityFromProcState(priorities[priorities.size() - 1])));
981
982            // Notify the client of disconnection
983            clientSp->notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
984                    CaptureResultExtras());
985        }
986    }
987
988    // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
989    // other clients from connecting in mServiceLockWrapper if held
990    mServiceLock.unlock();
991
992    // Clear caller identity temporarily so client disconnect PID checks work correctly
993    int64_t token = IPCThreadState::self()->clearCallingIdentity();
994
995    // Destroy evicted clients
996    for (auto& i : evictedClients) {
997        // Disconnect is blocking, and should only have returned when HAL has cleaned up
998        i->getValue()->disconnect(); // Clients will remove themselves from the active client list
999    }
1000
1001    IPCThreadState::self()->restoreCallingIdentity(token);
1002
1003    for (const auto& i : evictedClients) {
1004        ALOGV("%s: Waiting for disconnect to complete for client for device %s (PID %" PRId32 ")",
1005                __FUNCTION__, i->getKey().string(), i->getOwnerId());
1006        ret = mActiveClientManager.waitUntilRemoved(i, DEFAULT_DISCONNECT_TIMEOUT_NS);
1007        if (ret == TIMED_OUT) {
1008            ALOGE("%s: Timed out waiting for client for device %s to disconnect, "
1009                    "current clients:\n%s", __FUNCTION__, i->getKey().string(),
1010                    mActiveClientManager.toString().string());
1011            return -EBUSY;
1012        }
1013        if (ret != NO_ERROR) {
1014            ALOGE("%s: Received error waiting for client for device %s to disconnect: %s (%d), "
1015                    "current clients:\n%s", __FUNCTION__, i->getKey().string(), strerror(-ret),
1016                    ret, mActiveClientManager.toString().string());
1017            return ret;
1018        }
1019    }
1020
1021    evictedClients.clear();
1022
1023    // Once clients have been disconnected, relock
1024    mServiceLock.lock();
1025
1026    // Check again if the device was unplugged or something while we weren't holding mServiceLock
1027    if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) {
1028        return ret;
1029    }
1030
1031    *partial = clientDescriptor;
1032    return NO_ERROR;
1033}
1034
1035status_t CameraService::connect(
1036        const sp<ICameraClient>& cameraClient,
1037        int cameraId,
1038        const String16& clientPackageName,
1039        int clientUid,
1040        /*out*/
1041        sp<ICamera>& device) {
1042
1043    status_t ret = NO_ERROR;
1044    String8 id = String8::format("%d", cameraId);
1045    sp<Client> client = nullptr;
1046    ret = connectHelper<ICameraClient,Client>(cameraClient, id, CAMERA_HAL_API_VERSION_UNSPECIFIED,
1047            clientPackageName, clientUid, API_1, false, false, /*out*/client);
1048
1049    if(ret != NO_ERROR) {
1050        logRejected(id, getCallingPid(), String8(clientPackageName),
1051                String8::format("%s (%d)", strerror(-ret), ret));
1052        return ret;
1053    }
1054
1055    device = client;
1056    return NO_ERROR;
1057}
1058
1059status_t CameraService::connectLegacy(
1060        const sp<ICameraClient>& cameraClient,
1061        int cameraId, int halVersion,
1062        const String16& clientPackageName,
1063        int clientUid,
1064        /*out*/
1065        sp<ICamera>& device) {
1066
1067    String8 id = String8::format("%d", cameraId);
1068    int apiVersion = mModule->getModuleApiVersion();
1069    if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED &&
1070            apiVersion < CAMERA_MODULE_API_VERSION_2_3) {
1071        /*
1072         * Either the HAL version is unspecified in which case this just creates
1073         * a camera client selected by the latest device version, or
1074         * it's a particular version in which case the HAL must supported
1075         * the open_legacy call
1076         */
1077        ALOGE("%s: camera HAL module version %x doesn't support connecting to legacy HAL devices!",
1078                __FUNCTION__, apiVersion);
1079        logRejected(id, getCallingPid(), String8(clientPackageName),
1080                String8("HAL module version doesn't support legacy HAL connections"));
1081        return INVALID_OPERATION;
1082    }
1083
1084    status_t ret = NO_ERROR;
1085    sp<Client> client = nullptr;
1086    ret = connectHelper<ICameraClient,Client>(cameraClient, id, halVersion, clientPackageName,
1087            clientUid, API_1, true, false, /*out*/client);
1088
1089    if(ret != NO_ERROR) {
1090        logRejected(id, getCallingPid(), String8(clientPackageName),
1091                String8::format("%s (%d)", strerror(-ret), ret));
1092        return ret;
1093    }
1094
1095    device = client;
1096    return NO_ERROR;
1097}
1098
1099status_t CameraService::connectDevice(
1100        const sp<ICameraDeviceCallbacks>& cameraCb,
1101        int cameraId,
1102        const String16& clientPackageName,
1103        int clientUid,
1104        /*out*/
1105        sp<ICameraDeviceUser>& device) {
1106
1107    status_t ret = NO_ERROR;
1108    String8 id = String8::format("%d", cameraId);
1109    sp<CameraDeviceClient> client = nullptr;
1110    ret = connectHelper<ICameraDeviceCallbacks,CameraDeviceClient>(cameraCb, id,
1111            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, clientUid, API_2, false, false,
1112            /*out*/client);
1113
1114    if(ret != NO_ERROR) {
1115        logRejected(id, getCallingPid(), String8(clientPackageName),
1116                String8::format("%s (%d)", strerror(-ret), ret));
1117        return ret;
1118    }
1119
1120    device = client;
1121    return NO_ERROR;
1122}
1123
1124status_t CameraService::setTorchMode(const String16& cameraId, bool enabled,
1125        const sp<IBinder>& clientBinder) {
1126    if (enabled && clientBinder == NULL) {
1127        ALOGE("%s: torch client binder is NULL", __FUNCTION__);
1128        return -EINVAL;
1129    }
1130
1131    String8 id = String8(cameraId.string());
1132
1133    // verify id is valid.
1134    auto state = getCameraState(id);
1135    if (state == nullptr) {
1136        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1137        return -EINVAL;
1138    }
1139
1140    ICameraServiceListener::Status cameraStatus = state->getStatus();
1141    if (cameraStatus != ICameraServiceListener::STATUS_PRESENT &&
1142            cameraStatus != ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1143        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1144        return -EINVAL;
1145    }
1146
1147    {
1148        Mutex::Autolock al(mTorchStatusMutex);
1149        ICameraServiceListener::TorchStatus status;
1150        status_t res = getTorchStatusLocked(id, &status);
1151        if (res) {
1152            ALOGE("%s: getting current torch status failed for camera %s",
1153                    __FUNCTION__, id.string());
1154            return -EINVAL;
1155        }
1156
1157        if (status == ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE) {
1158            if (cameraStatus == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1159                ALOGE("%s: torch mode of camera %s is not available because "
1160                        "camera is in use", __FUNCTION__, id.string());
1161                return -EBUSY;
1162            } else {
1163                ALOGE("%s: torch mode of camera %s is not available due to "
1164                        "insufficient resources", __FUNCTION__, id.string());
1165                return -EUSERS;
1166            }
1167        }
1168    }
1169
1170    status_t res = mFlashlight->setTorchMode(id, enabled);
1171    if (res) {
1172        ALOGE("%s: setting torch mode of camera %s to %d failed. %s (%d)",
1173                __FUNCTION__, id.string(), enabled, strerror(-res), res);
1174        return res;
1175    }
1176
1177    {
1178        // update the link to client's death
1179        Mutex::Autolock al(mTorchClientMapMutex);
1180        ssize_t index = mTorchClientMap.indexOfKey(id);
1181        if (enabled) {
1182            if (index == NAME_NOT_FOUND) {
1183                mTorchClientMap.add(id, clientBinder);
1184            } else {
1185                const sp<IBinder> oldBinder = mTorchClientMap.valueAt(index);
1186                oldBinder->unlinkToDeath(this);
1187
1188                mTorchClientMap.replaceValueAt(index, clientBinder);
1189            }
1190            clientBinder->linkToDeath(this);
1191        } else if (index != NAME_NOT_FOUND) {
1192            sp<IBinder> oldBinder = mTorchClientMap.valueAt(index);
1193            oldBinder->unlinkToDeath(this);
1194        }
1195    }
1196
1197    return OK;
1198}
1199
1200void CameraService::notifySystemEvent(int eventId, int arg0) {
1201    switch(eventId) {
1202        case ICameraService::USER_SWITCHED: {
1203            doUserSwitch(/*newUserId*/arg0);
1204            break;
1205        }
1206        case ICameraService::NO_EVENT:
1207        default: {
1208            ALOGW("%s: Received invalid system event from system_server: %d", __FUNCTION__,
1209                    eventId);
1210            break;
1211        }
1212    }
1213}
1214
1215status_t CameraService::addListener(
1216                                const sp<ICameraServiceListener>& listener) {
1217    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
1218
1219    if (listener == 0) {
1220        ALOGE("%s: Listener must not be null", __FUNCTION__);
1221        return BAD_VALUE;
1222    }
1223
1224    Mutex::Autolock lock(mServiceLock);
1225
1226    {
1227        Mutex::Autolock lock(mStatusListenerLock);
1228        for (auto& it : mListenerList) {
1229            if (IInterface::asBinder(it) == IInterface::asBinder(listener)) {
1230                ALOGW("%s: Tried to add listener %p which was already subscribed",
1231                      __FUNCTION__, listener.get());
1232                return ALREADY_EXISTS;
1233            }
1234        }
1235
1236        mListenerList.push_back(listener);
1237    }
1238
1239
1240    /* Immediately signal current status to this listener only */
1241    {
1242        Mutex::Autolock lock(mCameraStatesLock);
1243        for (auto& i : mCameraStates) {
1244            // TODO: Update binder to use String16 for camera IDs and remove;
1245            int id = cameraIdToInt(i.first);
1246            if (id == -1) continue;
1247
1248            listener->onStatusChanged(i.second->getStatus(), id);
1249        }
1250    }
1251
1252    /* Immediately signal current torch status to this listener only */
1253    {
1254        Mutex::Autolock al(mTorchStatusMutex);
1255        for (size_t i = 0; i < mTorchStatusMap.size(); i++ ) {
1256            String16 id = String16(mTorchStatusMap.keyAt(i).string());
1257            listener->onTorchStatusChanged(mTorchStatusMap.valueAt(i), id);
1258        }
1259    }
1260
1261    return OK;
1262}
1263
1264status_t CameraService::removeListener(const sp<ICameraServiceListener>& listener) {
1265    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
1266
1267    if (listener == 0) {
1268        ALOGE("%s: Listener must not be null", __FUNCTION__);
1269        return BAD_VALUE;
1270    }
1271
1272    Mutex::Autolock lock(mServiceLock);
1273
1274    {
1275        Mutex::Autolock lock(mStatusListenerLock);
1276        for (auto it = mListenerList.begin(); it != mListenerList.end(); it++) {
1277            if (IInterface::asBinder(*it) == IInterface::asBinder(listener)) {
1278                mListenerList.erase(it);
1279                return OK;
1280            }
1281        }
1282    }
1283
1284    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
1285          __FUNCTION__, listener.get());
1286
1287    return BAD_VALUE;
1288}
1289
1290status_t CameraService::getLegacyParameters(int cameraId, /*out*/String16* parameters) {
1291    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1292
1293    if (parameters == NULL) {
1294        ALOGE("%s: parameters must not be null", __FUNCTION__);
1295        return BAD_VALUE;
1296    }
1297
1298    status_t ret = 0;
1299
1300    CameraParameters shimParams;
1301    if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) {
1302        // Error logged by caller
1303        return ret;
1304    }
1305
1306    String8 shimParamsString8 = shimParams.flatten();
1307    String16 shimParamsString16 = String16(shimParamsString8);
1308
1309    *parameters = shimParamsString16;
1310
1311    return OK;
1312}
1313
1314status_t CameraService::supportsCameraApi(int cameraId, int apiVersion) {
1315    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1316
1317    switch (apiVersion) {
1318        case API_VERSION_1:
1319        case API_VERSION_2:
1320            break;
1321        default:
1322            ALOGE("%s: Bad API version %d", __FUNCTION__, apiVersion);
1323            return BAD_VALUE;
1324    }
1325
1326    int facing = -1;
1327    int deviceVersion = getDeviceVersion(cameraId, &facing);
1328
1329    switch(deviceVersion) {
1330      case CAMERA_DEVICE_API_VERSION_1_0:
1331      case CAMERA_DEVICE_API_VERSION_2_0:
1332      case CAMERA_DEVICE_API_VERSION_2_1:
1333      case CAMERA_DEVICE_API_VERSION_3_0:
1334      case CAMERA_DEVICE_API_VERSION_3_1:
1335        if (apiVersion == API_VERSION_2) {
1336            ALOGV("%s: Camera id %d uses HAL prior to HAL3.2, doesn't support api2 without shim",
1337                    __FUNCTION__, cameraId);
1338            return -EOPNOTSUPP;
1339        } else { // if (apiVersion == API_VERSION_1) {
1340            ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported",
1341                    __FUNCTION__, cameraId);
1342            return OK;
1343        }
1344      case CAMERA_DEVICE_API_VERSION_3_2:
1345      case CAMERA_DEVICE_API_VERSION_3_3:
1346        ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly",
1347                __FUNCTION__, cameraId);
1348        return OK;
1349      case -1:
1350        ALOGE("%s: Invalid camera id %d", __FUNCTION__, cameraId);
1351        return BAD_VALUE;
1352      default:
1353        ALOGE("%s: Unknown camera device HAL version: %d", __FUNCTION__, deviceVersion);
1354        return INVALID_OPERATION;
1355    }
1356
1357    return OK;
1358}
1359
1360void CameraService::removeByClient(const BasicClient* client) {
1361    Mutex::Autolock lock(mServiceLock);
1362    for (auto& i : mActiveClientManager.getAll()) {
1363        auto clientSp = i->getValue();
1364        if (clientSp.get() == client) {
1365            mActiveClientManager.remove(i);
1366        }
1367    }
1368}
1369
1370bool CameraService::evictClientIdByRemote(const wp<IBinder>& remote) {
1371    const int callingPid = getCallingPid();
1372    const int servicePid = getpid();
1373    bool ret = false;
1374    {
1375        // Acquire mServiceLock and prevent other clients from connecting
1376        std::unique_ptr<AutoConditionLock> lock =
1377                AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1378
1379
1380        std::vector<sp<BasicClient>> evicted;
1381        for (auto& i : mActiveClientManager.getAll()) {
1382            auto clientSp = i->getValue();
1383            if (clientSp.get() == nullptr) {
1384                ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1385                mActiveClientManager.remove(i);
1386                continue;
1387            }
1388            if (remote == clientSp->getRemote() && (callingPid == servicePid ||
1389                    callingPid == clientSp->getClientPid())) {
1390                mActiveClientManager.remove(i);
1391                evicted.push_back(clientSp);
1392
1393                // Notify the client of disconnection
1394                clientSp->notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
1395                        CaptureResultExtras());
1396            }
1397        }
1398
1399        // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1400        // other clients from connecting in mServiceLockWrapper if held
1401        mServiceLock.unlock();
1402
1403        // Do not clear caller identity, remote caller should be client proccess
1404
1405        for (auto& i : evicted) {
1406            if (i.get() != nullptr) {
1407                i->disconnect();
1408                ret = true;
1409            }
1410        }
1411
1412        // Reacquire mServiceLock
1413        mServiceLock.lock();
1414
1415    } // lock is destroyed, allow further connect calls
1416
1417    return ret;
1418}
1419
1420
1421std::shared_ptr<CameraService::CameraState> CameraService::getCameraState(
1422        const String8& cameraId) const {
1423    std::shared_ptr<CameraState> state;
1424    {
1425        Mutex::Autolock lock(mCameraStatesLock);
1426        auto iter = mCameraStates.find(cameraId);
1427        if (iter != mCameraStates.end()) {
1428            state = iter->second;
1429        }
1430    }
1431    return state;
1432}
1433
1434sp<CameraService::BasicClient> CameraService::removeClientLocked(const String8& cameraId) {
1435    // Remove from active clients list
1436    auto clientDescriptorPtr = mActiveClientManager.remove(cameraId);
1437    if (clientDescriptorPtr == nullptr) {
1438        ALOGW("%s: Could not evict client, no client for camera ID %s", __FUNCTION__,
1439                cameraId.string());
1440        return sp<BasicClient>{nullptr};
1441    }
1442
1443    return clientDescriptorPtr->getValue();
1444}
1445
1446void CameraService::doUserSwitch(int newUserId) {
1447    // Acquire mServiceLock and prevent other clients from connecting
1448    std::unique_ptr<AutoConditionLock> lock =
1449            AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1450
1451    if (newUserId <= 0) {
1452        ALOGW("%s: Bad user ID %d given during user switch, resetting to default.", __FUNCTION__,
1453                newUserId);
1454        newUserId = DEFAULT_LAST_USER_ID;
1455    }
1456
1457    logUserSwitch(mLastUserId, newUserId);
1458
1459    mLastUserId = newUserId;
1460
1461    // Current user has switched, evict all current clients.
1462    std::vector<sp<BasicClient>> evicted;
1463    for (auto& i : mActiveClientManager.getAll()) {
1464        auto clientSp = i->getValue();
1465
1466        if (clientSp.get() == nullptr) {
1467            ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1468            continue;
1469        }
1470
1471        evicted.push_back(clientSp);
1472
1473        String8 curTime = getFormattedCurrentTime();
1474
1475        ALOGE("Evicting conflicting client for camera ID %s due to user change",
1476                i->getKey().string());
1477
1478        // Log the clients evicted
1479        logEvent(String8::format("EVICT device %s client held by package %s (PID %"
1480                PRId32 ", priority %" PRId32 ")\n   - Evicted due to user switch.",
1481                i->getKey().string(), String8{clientSp->getPackageName()}.string(),
1482                i->getOwnerId(), i->getPriority()));
1483
1484    }
1485
1486    // Do not hold mServiceLock while disconnecting clients, but retain the condition
1487    // blocking other clients from connecting in mServiceLockWrapper if held.
1488    mServiceLock.unlock();
1489
1490    // Clear caller identity temporarily so client disconnect PID checks work correctly
1491    int64_t token = IPCThreadState::self()->clearCallingIdentity();
1492
1493    for (auto& i : evicted) {
1494        i->disconnect();
1495    }
1496
1497    IPCThreadState::self()->restoreCallingIdentity(token);
1498
1499    // Reacquire mServiceLock
1500    mServiceLock.lock();
1501}
1502
1503void CameraService::logEvent(const char* event) {
1504    String8 curTime = getFormattedCurrentTime();
1505    Mutex::Autolock l(mLogLock);
1506    mEventLog.add(String8::format("%s : %s", curTime.string(), event));
1507}
1508
1509void CameraService::logDisconnected(const char* cameraId, int clientPid,
1510        const char* clientPackage) {
1511    // Log the clients evicted
1512    logEvent(String8::format("DISCONNECT device %s client for package %s (PID %d)", cameraId,
1513            clientPackage, clientPid));
1514}
1515
1516void CameraService::logConnected(const char* cameraId, int clientPid,
1517        const char* clientPackage) {
1518    // Log the clients evicted
1519    logEvent(String8::format("CONNECT device %s client for package %s (PID %d)", cameraId,
1520            clientPackage, clientPid));
1521}
1522
1523void CameraService::logRejected(const char* cameraId, int clientPid,
1524        const char* clientPackage, const char* reason) {
1525    // Log the client rejected
1526    logEvent(String8::format("REJECT device %s client for package %s (PID %d), reason: (%s)",
1527            cameraId, clientPackage, clientPid, reason));
1528}
1529
1530void CameraService::logUserSwitch(int oldUserId, int newUserId) {
1531    // Log the new and old users
1532    logEvent(String8::format("USER_SWITCH from old user: %d , to new user: %d", oldUserId,
1533            newUserId));
1534}
1535
1536void CameraService::logDeviceRemoved(const char* cameraId, const char* reason) {
1537    // Log the device removal
1538    logEvent(String8::format("REMOVE device %s, reason: (%s)", cameraId, reason));
1539}
1540
1541void CameraService::logDeviceAdded(const char* cameraId, const char* reason) {
1542    // Log the device removal
1543    logEvent(String8::format("ADD device %s, reason: (%s)", cameraId, reason));
1544}
1545
1546void CameraService::logClientDied(int clientPid, const char* reason) {
1547    // Log the device removal
1548    logEvent(String8::format("DIED client(s) with PID %d, reason: (%s)", clientPid, reason));
1549}
1550
1551void CameraService::logServiceError(const char* msg, int errorCode) {
1552    String8 curTime = getFormattedCurrentTime();
1553    logEvent(String8::format("SERVICE ERROR: %s : %d (%s)", msg, errorCode, strerror(errorCode)));
1554}
1555
1556status_t CameraService::onTransact(uint32_t code, const Parcel& data, Parcel* reply,
1557        uint32_t flags) {
1558
1559    const int pid = getCallingPid();
1560    const int selfPid = getpid();
1561
1562    // Permission checks
1563    switch (code) {
1564        case BnCameraService::CONNECT:
1565        case BnCameraService::CONNECT_DEVICE:
1566        case BnCameraService::CONNECT_LEGACY: {
1567            if (pid != selfPid) {
1568                // we're called from a different process, do the real check
1569                if (!checkCallingPermission(
1570                        String16("android.permission.CAMERA"))) {
1571                    const int uid = getCallingUid();
1572                    ALOGE("Permission Denial: "
1573                         "can't use the camera pid=%d, uid=%d", pid, uid);
1574                    return PERMISSION_DENIED;
1575                }
1576            }
1577            break;
1578        }
1579        case BnCameraService::NOTIFY_SYSTEM_EVENT: {
1580            if (pid != selfPid) {
1581                // Ensure we're being called by system_server, or similar process with
1582                // permissions to notify the camera service about system events
1583                if (!checkCallingPermission(
1584                        String16("android.permission.CAMERA_SEND_SYSTEM_EVENTS"))) {
1585                    const int uid = getCallingUid();
1586                    ALOGE("Permission Denial: cannot send updates to camera service about system"
1587                            " events from pid=%d, uid=%d", pid, uid);
1588                    return PERMISSION_DENIED;
1589                }
1590            }
1591            break;
1592        }
1593    }
1594
1595    return BnCameraService::onTransact(code, data, reply, flags);
1596}
1597
1598// We share the media players for shutter and recording sound for all clients.
1599// A reference count is kept to determine when we will actually release the
1600// media players.
1601
1602MediaPlayer* CameraService::newMediaPlayer(const char *file) {
1603    MediaPlayer* mp = new MediaPlayer();
1604    if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) {
1605        mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
1606        mp->prepare();
1607    } else {
1608        ALOGE("Failed to load CameraService sounds: %s", file);
1609        return NULL;
1610    }
1611    return mp;
1612}
1613
1614void CameraService::loadSound() {
1615    Mutex::Autolock lock(mSoundLock);
1616    LOG1("CameraService::loadSound ref=%d", mSoundRef);
1617    if (mSoundRef++) return;
1618
1619    mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
1620    mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
1621}
1622
1623void CameraService::releaseSound() {
1624    Mutex::Autolock lock(mSoundLock);
1625    LOG1("CameraService::releaseSound ref=%d", mSoundRef);
1626    if (--mSoundRef) return;
1627
1628    for (int i = 0; i < NUM_SOUNDS; i++) {
1629        if (mSoundPlayer[i] != 0) {
1630            mSoundPlayer[i]->disconnect();
1631            mSoundPlayer[i].clear();
1632        }
1633    }
1634}
1635
1636void CameraService::playSound(sound_kind kind) {
1637    LOG1("playSound(%d)", kind);
1638    Mutex::Autolock lock(mSoundLock);
1639    sp<MediaPlayer> player = mSoundPlayer[kind];
1640    if (player != 0) {
1641        player->seekTo(0);
1642        player->start();
1643    }
1644}
1645
1646// ----------------------------------------------------------------------------
1647
1648CameraService::Client::Client(const sp<CameraService>& cameraService,
1649        const sp<ICameraClient>& cameraClient,
1650        const String16& clientPackageName,
1651        int cameraId, int cameraFacing,
1652        int clientPid, uid_t clientUid,
1653        int servicePid) :
1654        CameraService::BasicClient(cameraService,
1655                IInterface::asBinder(cameraClient),
1656                clientPackageName,
1657                cameraId, cameraFacing,
1658                clientPid, clientUid,
1659                servicePid)
1660{
1661    int callingPid = getCallingPid();
1662    LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
1663
1664    mRemoteCallback = cameraClient;
1665
1666    cameraService->loadSound();
1667
1668    LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
1669}
1670
1671// tear down the client
1672CameraService::Client::~Client() {
1673    ALOGV("~Client");
1674    mDestructionStarted = true;
1675
1676    mCameraService->releaseSound();
1677    // unconditionally disconnect. function is idempotent
1678    Client::disconnect();
1679}
1680
1681CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
1682        const sp<IBinder>& remoteCallback,
1683        const String16& clientPackageName,
1684        int cameraId, int cameraFacing,
1685        int clientPid, uid_t clientUid,
1686        int servicePid):
1687        mClientPackageName(clientPackageName), mDisconnected(false)
1688{
1689    mCameraService = cameraService;
1690    mRemoteBinder = remoteCallback;
1691    mCameraId = cameraId;
1692    mCameraFacing = cameraFacing;
1693    mClientPid = clientPid;
1694    mClientUid = clientUid;
1695    mServicePid = servicePid;
1696    mOpsActive = false;
1697    mDestructionStarted = false;
1698}
1699
1700CameraService::BasicClient::~BasicClient() {
1701    ALOGV("~BasicClient");
1702    mDestructionStarted = true;
1703}
1704
1705void CameraService::BasicClient::disconnect() {
1706    if (mDisconnected) {
1707        ALOGE("%s: Disconnect called on already disconnected client for device %d", __FUNCTION__,
1708                mCameraId);
1709        return;
1710    }
1711    mDisconnected = true;;
1712
1713    mCameraService->removeByClient(this);
1714    mCameraService->logDisconnected(String8::format("%d", mCameraId), mClientPid,
1715            String8(mClientPackageName));
1716
1717    sp<IBinder> remote = getRemote();
1718    if (remote != nullptr) {
1719        remote->unlinkToDeath(mCameraService);
1720    }
1721
1722    finishCameraOps();
1723    ALOGI("%s: Disconnected client for camera %d for PID %d", __FUNCTION__, mCameraId, mClientPid);
1724
1725    // client shouldn't be able to call into us anymore
1726    mClientPid = 0;
1727}
1728
1729String16 CameraService::BasicClient::getPackageName() const {
1730    return mClientPackageName;
1731}
1732
1733
1734int CameraService::BasicClient::getClientPid() const {
1735    return mClientPid;
1736}
1737
1738bool CameraService::BasicClient::canCastToApiClient(apiLevel level) const {
1739    // Defaults to API2.
1740    return level == API_2;
1741}
1742
1743status_t CameraService::BasicClient::startCameraOps() {
1744    int32_t res;
1745    // Notify app ops that the camera is not available
1746    mOpsCallback = new OpsCallback(this);
1747
1748    {
1749        ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
1750              __FUNCTION__, String8(mClientPackageName).string(), mClientUid);
1751    }
1752
1753    mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
1754            mClientPackageName, mOpsCallback);
1755    res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
1756            mClientUid, mClientPackageName);
1757
1758    if (res == AppOpsManager::MODE_ERRORED) {
1759        ALOGI("Camera %d: Access for \"%s\" has been revoked",
1760                mCameraId, String8(mClientPackageName).string());
1761        return PERMISSION_DENIED;
1762    }
1763
1764    if (res == AppOpsManager::MODE_IGNORED) {
1765        ALOGI("Camera %d: Access for \"%s\" has been restricted",
1766                mCameraId, String8(mClientPackageName).string());
1767        return INVALID_OPERATION;
1768    }
1769
1770    mOpsActive = true;
1771
1772    // Transition device availability listeners from PRESENT -> NOT_AVAILABLE
1773    mCameraService->updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
1774            String8::format("%d", mCameraId));
1775
1776    return OK;
1777}
1778
1779status_t CameraService::BasicClient::finishCameraOps() {
1780    // Check if startCameraOps succeeded, and if so, finish the camera op
1781    if (mOpsActive) {
1782        // Notify app ops that the camera is available again
1783        mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
1784                mClientPackageName);
1785        mOpsActive = false;
1786
1787        auto rejected = {ICameraServiceListener::STATUS_NOT_PRESENT,
1788                ICameraServiceListener::STATUS_ENUMERATING};
1789
1790        // Transition to PRESENT if the camera is not in either of the rejected states
1791        mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
1792                String8::format("%d", mCameraId), rejected);
1793
1794        // Notify flashlight that a camera device is closed.
1795        mCameraService->mFlashlight->deviceClosed(
1796                String8::format("%d", mCameraId));
1797    }
1798    // Always stop watching, even if no camera op is active
1799    if (mOpsCallback != NULL) {
1800        mAppOpsManager.stopWatchingMode(mOpsCallback);
1801    }
1802    mOpsCallback.clear();
1803
1804    return OK;
1805}
1806
1807void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
1808    String8 name(packageName);
1809    String8 myName(mClientPackageName);
1810
1811    if (op != AppOpsManager::OP_CAMERA) {
1812        ALOGW("Unexpected app ops notification received: %d", op);
1813        return;
1814    }
1815
1816    int32_t res;
1817    res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
1818            mClientUid, mClientPackageName);
1819    ALOGV("checkOp returns: %d, %s ", res,
1820            res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
1821            res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
1822            res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
1823            "UNKNOWN");
1824
1825    if (res != AppOpsManager::MODE_ALLOWED) {
1826        ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
1827                myName.string());
1828        // Reset the client PID to allow server-initiated disconnect,
1829        // and to prevent further calls by client.
1830        mClientPid = getCallingPid();
1831        CaptureResultExtras resultExtras; // a dummy result (invalid)
1832        notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras);
1833        disconnect();
1834    }
1835}
1836
1837// ----------------------------------------------------------------------------
1838
1839// Provide client strong pointer for callbacks.
1840sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) {
1841    String8 cameraId = String8::format("%d", (int)(intptr_t) user);
1842    auto clientDescriptor = gCameraService->mActiveClientManager.get(cameraId);
1843    if (clientDescriptor != nullptr) {
1844        return sp<Client>{
1845                static_cast<Client*>(clientDescriptor->getValue().get())};
1846    }
1847    return sp<Client>{nullptr};
1848}
1849
1850void CameraService::Client::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1851        const CaptureResultExtras& resultExtras) {
1852    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1853}
1854
1855// NOTE: function is idempotent
1856void CameraService::Client::disconnect() {
1857    ALOGV("Client::disconnect");
1858    BasicClient::disconnect();
1859}
1860
1861bool CameraService::Client::canCastToApiClient(apiLevel level) const {
1862    return level == API_1;
1863}
1864
1865CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
1866        mClient(client) {
1867}
1868
1869void CameraService::Client::OpsCallback::opChanged(int32_t op,
1870        const String16& packageName) {
1871    sp<BasicClient> client = mClient.promote();
1872    if (client != NULL) {
1873        client->opChanged(op, packageName);
1874    }
1875}
1876
1877// ----------------------------------------------------------------------------
1878//                  CameraState
1879// ----------------------------------------------------------------------------
1880
1881CameraService::CameraState::CameraState(const String8& id, int cost,
1882        const std::set<String8>& conflicting) : mId(id),
1883        mStatus(ICameraServiceListener::STATUS_PRESENT), mCost(cost), mConflicting(conflicting) {}
1884
1885CameraService::CameraState::~CameraState() {}
1886
1887ICameraServiceListener::Status CameraService::CameraState::getStatus() const {
1888    Mutex::Autolock lock(mStatusLock);
1889    return mStatus;
1890}
1891
1892CameraParameters CameraService::CameraState::getShimParams() const {
1893    return mShimParams;
1894}
1895
1896void CameraService::CameraState::setShimParams(const CameraParameters& params) {
1897    mShimParams = params;
1898}
1899
1900int CameraService::CameraState::getCost() const {
1901    return mCost;
1902}
1903
1904std::set<String8> CameraService::CameraState::getConflicting() const {
1905    return mConflicting;
1906}
1907
1908String8 CameraService::CameraState::getId() const {
1909    return mId;
1910}
1911
1912// ----------------------------------------------------------------------------
1913//                  CameraClientManager
1914// ----------------------------------------------------------------------------
1915
1916CameraService::CameraClientManager::~CameraClientManager() {}
1917
1918sp<CameraService::BasicClient> CameraService::CameraClientManager::getCameraClient(
1919        const String8& id) const {
1920    auto descriptor = get(id);
1921    if (descriptor == nullptr) {
1922        return sp<BasicClient>{nullptr};
1923    }
1924    return descriptor->getValue();
1925}
1926
1927String8 CameraService::CameraClientManager::toString() const {
1928    auto all = getAll();
1929    String8 ret("[");
1930    bool hasAny = false;
1931    for (auto& i : all) {
1932        hasAny = true;
1933        String8 key = i->getKey();
1934        int32_t cost = i->getCost();
1935        int32_t pid = i->getOwnerId();
1936        int32_t priority = i->getPriority();
1937        auto conflicting = i->getConflicting();
1938        auto clientSp = i->getValue();
1939        String8 packageName;
1940        if (clientSp.get() != nullptr) {
1941            packageName = String8{clientSp->getPackageName()};
1942        }
1943        ret.appendFormat("\n(Camera ID: %s, Cost: %" PRId32 ", PID: %" PRId32 ", Priority: %"
1944                PRId32 ", ", key.string(), cost, pid, priority);
1945
1946        if (packageName.size() != 0) {
1947            ret.appendFormat("Client Package Name: %s", packageName.string());
1948        }
1949
1950        ret.append(", Conflicting Client Devices: {");
1951        for (auto& j : conflicting) {
1952            ret.appendFormat("%s, ", j.string());
1953        }
1954        ret.append("})");
1955    }
1956    if (hasAny) ret.append("\n");
1957    ret.append("]\n");
1958    return ret;
1959}
1960
1961CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor(
1962        const String8& key, const sp<BasicClient>& value, int32_t cost,
1963        const std::set<String8>& conflictingKeys, int32_t priority, int32_t ownerId) {
1964
1965    return std::make_shared<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>(
1966            key, value, cost, conflictingKeys, priority, ownerId);
1967}
1968
1969CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor(
1970        const sp<BasicClient>& value, const CameraService::DescriptorPtr& partial) {
1971    return makeClientDescriptor(partial->getKey(), value, partial->getCost(),
1972            partial->getConflicting(), partial->getPriority(), partial->getOwnerId());
1973}
1974
1975// ----------------------------------------------------------------------------
1976
1977static const int kDumpLockRetries = 50;
1978static const int kDumpLockSleep = 60000;
1979
1980static bool tryLock(Mutex& mutex)
1981{
1982    bool locked = false;
1983    for (int i = 0; i < kDumpLockRetries; ++i) {
1984        if (mutex.tryLock() == NO_ERROR) {
1985            locked = true;
1986            break;
1987        }
1988        usleep(kDumpLockSleep);
1989    }
1990    return locked;
1991}
1992
1993status_t CameraService::dump(int fd, const Vector<String16>& args) {
1994    String8 result("Dump of the Camera Service:\n");
1995    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
1996        result.appendFormat("Permission Denial: "
1997                "can't dump CameraService from pid=%d, uid=%d\n",
1998                getCallingPid(),
1999                getCallingUid());
2000        write(fd, result.string(), result.size());
2001    } else {
2002        bool locked = tryLock(mServiceLock);
2003        // failed to lock - CameraService is probably deadlocked
2004        if (!locked) {
2005            result.append("CameraService may be deadlocked\n");
2006            write(fd, result.string(), result.size());
2007        }
2008
2009        bool hasClient = false;
2010        if (!mModule) {
2011            result = String8::format("No camera module available!\n");
2012            write(fd, result.string(), result.size());
2013
2014            // Dump event log for error information
2015            dumpEventLog(fd);
2016
2017            if (locked) mServiceLock.unlock();
2018            return NO_ERROR;
2019        }
2020
2021        result = String8::format("Camera module HAL API version: 0x%x\n", mModule->getHalApiVersion());
2022        result.appendFormat("Camera module API version: 0x%x\n", mModule->getModuleApiVersion());
2023        result.appendFormat("Camera module name: %s\n", mModule->getModuleName());
2024        result.appendFormat("Camera module author: %s\n", mModule->getModuleAuthor());
2025        result.appendFormat("Number of camera devices: %d\n", mNumberOfCameras);
2026        String8 activeClientString = mActiveClientManager.toString();
2027        result.appendFormat("Active Camera Clients:\n%s", activeClientString.string());
2028
2029        sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
2030        if (desc == NULL) {
2031            result.appendFormat("Vendor tags left unimplemented.\n");
2032        } else {
2033            result.appendFormat("Vendor tag definitions:\n");
2034        }
2035
2036        write(fd, result.string(), result.size());
2037
2038        if (desc != NULL) {
2039            desc->dump(fd, /*verbosity*/2, /*indentation*/4);
2040        }
2041
2042        dumpEventLog(fd);
2043
2044        bool stateLocked = tryLock(mCameraStatesLock);
2045        if (!stateLocked) {
2046            result = String8::format("CameraStates in use, may be deadlocked\n");
2047            write(fd, result.string(), result.size());
2048        }
2049
2050        for (auto& state : mCameraStates) {
2051            String8 cameraId = state.first;
2052            result = String8::format("Camera %s information:\n", cameraId.string());
2053            camera_info info;
2054
2055            // TODO: Change getCameraInfo + HAL to use String cameraIds
2056            status_t rc = mModule->getCameraInfo(cameraIdToInt(cameraId), &info);
2057            if (rc != OK) {
2058                result.appendFormat("  Error reading static information!\n");
2059                write(fd, result.string(), result.size());
2060            } else {
2061                result.appendFormat("  Facing: %s\n",
2062                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
2063                result.appendFormat("  Orientation: %d\n", info.orientation);
2064                int deviceVersion;
2065                if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0) {
2066                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
2067                } else {
2068                    deviceVersion = info.device_version;
2069                }
2070
2071                auto conflicting = state.second->getConflicting();
2072                result.appendFormat("  Resource Cost: %d\n", state.second->getCost());
2073                result.appendFormat("  Conflicting Devices:");
2074                for (auto& id : conflicting) {
2075                    result.appendFormat(" %s", cameraId.string());
2076                }
2077                if (conflicting.size() == 0) {
2078                    result.appendFormat(" NONE");
2079                }
2080                result.appendFormat("\n");
2081
2082                result.appendFormat("  Device version: %#x\n", deviceVersion);
2083                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
2084                    result.appendFormat("  Device static metadata:\n");
2085                    write(fd, result.string(), result.size());
2086                    dump_indented_camera_metadata(info.static_camera_characteristics,
2087                            fd, /*verbosity*/2, /*indentation*/4);
2088                } else {
2089                    write(fd, result.string(), result.size());
2090                }
2091
2092                CameraParameters p = state.second->getShimParams();
2093                if (!p.isEmpty()) {
2094                    result = String8::format("  Camera1 API shim is using parameters:\n        ");
2095                    write(fd, result.string(), result.size());
2096                    p.dump(fd, args);
2097                }
2098            }
2099
2100            auto clientDescriptor = mActiveClientManager.get(cameraId);
2101            if (clientDescriptor == nullptr) {
2102                result = String8::format("  Device %s is closed, no client instance\n",
2103                        cameraId.string());
2104                write(fd, result.string(), result.size());
2105                continue;
2106            }
2107            hasClient = true;
2108            result = String8::format("  Device %s is open. Client instance dump:\n\n",
2109                    cameraId.string());
2110            result.appendFormat("Client priority level: %d\n", clientDescriptor->getPriority());
2111            result.appendFormat("Client PID: %d\n", clientDescriptor->getOwnerId());
2112
2113            auto client = clientDescriptor->getValue();
2114            result.appendFormat("Client package: %s\n",
2115                    String8(client->getPackageName()).string());
2116            write(fd, result.string(), result.size());
2117
2118            client->dump(fd, args);
2119        }
2120
2121        if (stateLocked) mCameraStatesLock.unlock();
2122
2123        if (!hasClient) {
2124            result = String8::format("\nNo active camera clients yet.\n");
2125            write(fd, result.string(), result.size());
2126        }
2127
2128        if (locked) mServiceLock.unlock();
2129
2130        // Dump camera traces if there were any
2131        write(fd, "\n", 1);
2132        camera3::CameraTraces::dump(fd, args);
2133
2134        // change logging level
2135        int n = args.size();
2136        for (int i = 0; i + 1 < n; i++) {
2137            String16 verboseOption("-v");
2138            if (args[i] == verboseOption) {
2139                String8 levelStr(args[i+1]);
2140                int level = atoi(levelStr.string());
2141                result = String8::format("\nSetting log level to %d.\n", level);
2142                setLogLevel(level);
2143                write(fd, result.string(), result.size());
2144            }
2145        }
2146    }
2147    return NO_ERROR;
2148}
2149
2150void CameraService::dumpEventLog(int fd) {
2151    String8 result = String8("\nPrior client events (most recent at top):\n");
2152
2153    Mutex::Autolock l(mLogLock);
2154    for (const auto& msg : mEventLog) {
2155        result.appendFormat("  %s\n", msg.string());
2156    }
2157
2158    if (mEventLog.size() == DEFAULT_EVENT_LOG_LENGTH) {
2159        result.append("  ...\n");
2160    } else if (mEventLog.size() == 0) {
2161        result.append("  [no events yet]\n");
2162    }
2163    result.append("\n");
2164
2165    write(fd, result.string(), result.size());
2166}
2167
2168void CameraService::handleTorchClientBinderDied(const wp<IBinder> &who) {
2169    Mutex::Autolock al(mTorchClientMapMutex);
2170    for (size_t i = 0; i < mTorchClientMap.size(); i++) {
2171        if (mTorchClientMap[i] == who) {
2172            // turn off the torch mode that was turned on by dead client
2173            String8 cameraId = mTorchClientMap.keyAt(i);
2174            status_t res = mFlashlight->setTorchMode(cameraId, false);
2175            if (res) {
2176                ALOGE("%s: torch client died but couldn't turn off torch: "
2177                    "%s (%d)", __FUNCTION__, strerror(-res), res);
2178                return;
2179            }
2180            mTorchClientMap.removeItemsAt(i);
2181            break;
2182        }
2183    }
2184}
2185
2186/*virtual*/void CameraService::binderDied(const wp<IBinder> &who) {
2187
2188    /**
2189      * While tempting to promote the wp<IBinder> into a sp, it's actually not supported by the
2190      * binder driver
2191      */
2192
2193    logClientDied(getCallingPid(), String8("Binder died unexpectedly"));
2194
2195    // check torch client
2196    handleTorchClientBinderDied(who);
2197
2198    // check camera device client
2199    if(!evictClientIdByRemote(who)) {
2200        ALOGV("%s: Java client's binder death already cleaned up (normal case)", __FUNCTION__);
2201        return;
2202    }
2203
2204    ALOGE("%s: Java client's binder died, removing it from the list of active clients",
2205            __FUNCTION__);
2206}
2207
2208void CameraService::updateStatus(ICameraServiceListener::Status status, const String8& cameraId) {
2209    updateStatus(status, cameraId, {});
2210}
2211
2212void CameraService::updateStatus(ICameraServiceListener::Status status, const String8& cameraId,
2213        std::initializer_list<ICameraServiceListener::Status> rejectSourceStates) {
2214    // Do not lock mServiceLock here or can get into a deadlock from
2215    // connect() -> disconnect -> updateStatus
2216
2217    auto state = getCameraState(cameraId);
2218
2219    if (state == nullptr) {
2220        ALOGW("%s: Could not update the status for %s, no such device exists", __FUNCTION__,
2221                cameraId.string());
2222        return;
2223    }
2224
2225    // Update the status for this camera state, then send the onStatusChangedCallbacks to each
2226    // of the listeners with both the mStatusStatus and mStatusListenerLock held
2227    state->updateStatus(status, cameraId, rejectSourceStates, [this]
2228            (const String8& cameraId, ICameraServiceListener::Status status) {
2229
2230            if (status != ICameraServiceListener::STATUS_ENUMERATING) {
2231                // Update torch status if it has a flash unit.
2232                Mutex::Autolock al(mTorchStatusMutex);
2233                ICameraServiceListener::TorchStatus torchStatus;
2234                if (getTorchStatusLocked(cameraId, &torchStatus) !=
2235                        NAME_NOT_FOUND) {
2236                    ICameraServiceListener::TorchStatus newTorchStatus =
2237                            status == ICameraServiceListener::STATUS_PRESENT ?
2238                            ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF :
2239                            ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE;
2240                    if (torchStatus != newTorchStatus) {
2241                        onTorchStatusChangedLocked(cameraId, newTorchStatus);
2242                    }
2243                }
2244            }
2245
2246            Mutex::Autolock lock(mStatusListenerLock);
2247
2248            for (auto& listener : mListenerList) {
2249                // TODO: Refactor status listeners to use strings for Camera IDs and remove this.
2250                int id = cameraIdToInt(cameraId);
2251                if (id != -1) listener->onStatusChanged(status, id);
2252            }
2253        });
2254}
2255
2256status_t CameraService::getTorchStatusLocked(
2257        const String8& cameraId,
2258        ICameraServiceListener::TorchStatus *status) const {
2259    if (!status) {
2260        return BAD_VALUE;
2261    }
2262    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2263    if (index == NAME_NOT_FOUND) {
2264        // invalid camera ID or the camera doesn't have a flash unit
2265        return NAME_NOT_FOUND;
2266    }
2267
2268    *status = mTorchStatusMap.valueAt(index);
2269    return OK;
2270}
2271
2272status_t CameraService::setTorchStatusLocked(const String8& cameraId,
2273        ICameraServiceListener::TorchStatus status) {
2274    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2275    if (index == NAME_NOT_FOUND) {
2276        return BAD_VALUE;
2277    }
2278    ICameraServiceListener::TorchStatus& item =
2279            mTorchStatusMap.editValueAt(index);
2280    item = status;
2281
2282    return OK;
2283}
2284
2285}; // namespace android
2286