CameraService.cpp revision f2326ac96366ec4d05f470cc4a0b407e7805bab7 
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    // Note: Unlike the ordering for ActivityManager, persistent system processes will always lose
523    //       the camera to the top/foreground applications.
524    switch(procState) {
525        case PROCESS_STATE_TOP: // User visible
526            return 100;
527        case PROCESS_STATE_IMPORTANT_FOREGROUND: // Foreground
528            return 90;
529        case PROCESS_STATE_PERSISTENT: // Persistent system services
530        case PROCESS_STATE_PERSISTENT_UI:
531            return 80;
532        case PROCESS_STATE_IMPORTANT_BACKGROUND: // "Important" background processes
533            return 70;
534        case PROCESS_STATE_BACKUP: // Everything else
535        case PROCESS_STATE_HEAVY_WEIGHT:
536        case PROCESS_STATE_SERVICE:
537        case PROCESS_STATE_RECEIVER:
538        case PROCESS_STATE_HOME:
539        case PROCESS_STATE_LAST_ACTIVITY:
540        case PROCESS_STATE_CACHED_ACTIVITY:
541        case PROCESS_STATE_CACHED_ACTIVITY_CLIENT:
542        case PROCESS_STATE_CACHED_EMPTY:
543            return 1;
544        case PROCESS_STATE_NONEXISTENT:
545            return -1;
546        default:
547            ALOGE("%s: Received unknown process state from ActivityManagerService!", __FUNCTION__);
548            return -1;
549    }
550}
551
552status_t CameraService::getCameraVendorTagDescriptor(/*out*/sp<VendorTagDescriptor>& desc) {
553    if (!mModule) {
554        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
555        return -ENODEV;
556    }
557
558    desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
559    return OK;
560}
561
562int CameraService::getDeviceVersion(int cameraId, int* facing) {
563    struct camera_info info;
564    if (mModule->getCameraInfo(cameraId, &info) != OK) {
565        return -1;
566    }
567
568    int deviceVersion;
569    if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) {
570        deviceVersion = info.device_version;
571    } else {
572        deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
573    }
574
575    if (facing) {
576        *facing = info.facing;
577    }
578
579    return deviceVersion;
580}
581
582status_t CameraService::filterGetInfoErrorCode(status_t err) {
583    switch(err) {
584        case NO_ERROR:
585        case -EINVAL:
586            return err;
587        default:
588            break;
589    }
590    return -ENODEV;
591}
592
593bool CameraService::setUpVendorTags() {
594    vendor_tag_ops_t vOps = vendor_tag_ops_t();
595
596    // Check if vendor operations have been implemented
597    if (!mModule->isVendorTagDefined()) {
598        ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__);
599        return false;
600    }
601
602    ATRACE_BEGIN("camera3->get_metadata_vendor_tag_ops");
603    mModule->getVendorTagOps(&vOps);
604    ATRACE_END();
605
606    // Ensure all vendor operations are present
607    if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL ||
608            vOps.get_section_name == NULL || vOps.get_tag_name == NULL ||
609            vOps.get_tag_type == NULL) {
610        ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions."
611               , __FUNCTION__);
612        return false;
613    }
614
615    // Read all vendor tag definitions into a descriptor
616    sp<VendorTagDescriptor> desc;
617    status_t res;
618    if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc))
619            != OK) {
620        ALOGE("%s: Could not generate descriptor from vendor tag operations,"
621              "received error %s (%d). Camera clients will not be able to use"
622              "vendor tags", __FUNCTION__, strerror(res), res);
623        return false;
624    }
625
626    // Set the global descriptor to use with camera metadata
627    VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc);
628    return true;
629}
630
631status_t CameraService::makeClient(const sp<CameraService>& cameraService,
632        const sp<IInterface>& cameraCb, const String16& packageName, const String8& cameraId,
633        int facing, int clientPid, uid_t clientUid, int servicePid, bool legacyMode,
634        int halVersion, int deviceVersion, apiLevel effectiveApiLevel,
635        /*out*/sp<BasicClient>* client) {
636
637    // TODO: Update CameraClients + HAL interface to use strings for Camera IDs
638    int id = cameraIdToInt(cameraId);
639    if (id == -1) {
640        ALOGE("%s: Invalid camera ID %s, cannot convert to integer.", __FUNCTION__,
641                cameraId.string());
642        return BAD_VALUE;
643    }
644
645    if (halVersion < 0 || halVersion == deviceVersion) {
646        // Default path: HAL version is unspecified by caller, create CameraClient
647        // based on device version reported by the HAL.
648        switch(deviceVersion) {
649          case CAMERA_DEVICE_API_VERSION_1_0:
650            if (effectiveApiLevel == API_1) {  // Camera1 API route
651                sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
652                *client = new CameraClient(cameraService, tmp, packageName, id, facing,
653                        clientPid, clientUid, getpid(), legacyMode);
654            } else { // Camera2 API route
655                ALOGW("Camera using old HAL version: %d", deviceVersion);
656                return -EOPNOTSUPP;
657            }
658            break;
659          case CAMERA_DEVICE_API_VERSION_2_0:
660          case CAMERA_DEVICE_API_VERSION_2_1:
661          case CAMERA_DEVICE_API_VERSION_3_0:
662          case CAMERA_DEVICE_API_VERSION_3_1:
663          case CAMERA_DEVICE_API_VERSION_3_2:
664          case CAMERA_DEVICE_API_VERSION_3_3:
665            if (effectiveApiLevel == API_1) { // Camera1 API route
666                sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
667                *client = new Camera2Client(cameraService, tmp, packageName, id, facing,
668                        clientPid, clientUid, servicePid, legacyMode);
669            } else { // Camera2 API route
670                sp<ICameraDeviceCallbacks> tmp =
671                        static_cast<ICameraDeviceCallbacks*>(cameraCb.get());
672                *client = new CameraDeviceClient(cameraService, tmp, packageName, id,
673                        facing, clientPid, clientUid, servicePid);
674            }
675            break;
676          default:
677            // Should not be reachable
678            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
679            return INVALID_OPERATION;
680        }
681    } else {
682        // A particular HAL version is requested by caller. Create CameraClient
683        // based on the requested HAL version.
684        if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 &&
685            halVersion == CAMERA_DEVICE_API_VERSION_1_0) {
686            // Only support higher HAL version device opened as HAL1.0 device.
687            sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get());
688            *client = new CameraClient(cameraService, tmp, packageName, id, facing,
689                    clientPid, clientUid, servicePid, legacyMode);
690        } else {
691            // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet.
692            ALOGE("Invalid camera HAL version %x: HAL %x device can only be"
693                    " opened as HAL %x device", halVersion, deviceVersion,
694                    CAMERA_DEVICE_API_VERSION_1_0);
695            return INVALID_OPERATION;
696        }
697    }
698    return NO_ERROR;
699}
700
701status_t CameraService::initializeShimMetadata(int cameraId) {
702    int uid = getCallingUid();
703
704    String16 internalPackageName("media");
705    String8 id = String8::format("%d", cameraId);
706    status_t ret = NO_ERROR;
707    sp<Client> tmp = nullptr;
708    if ((ret = connectHelper<ICameraClient,Client>(sp<ICameraClient>{nullptr}, id,
709            static_cast<int>(CAMERA_HAL_API_VERSION_UNSPECIFIED), internalPackageName, uid, API_1,
710            false, true, tmp)) != NO_ERROR) {
711        ALOGE("%s: Error %d (%s) initializing shim metadata.", __FUNCTION__, ret, strerror(ret));
712        return ret;
713    }
714    return NO_ERROR;
715}
716
717status_t CameraService::getLegacyParametersLazy(int cameraId,
718        /*out*/
719        CameraParameters* parameters) {
720
721    ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId);
722
723    status_t ret = 0;
724
725    if (parameters == NULL) {
726        ALOGE("%s: parameters must not be null", __FUNCTION__);
727        return BAD_VALUE;
728    }
729
730    String8 id = String8::format("%d", cameraId);
731
732    // Check if we already have parameters
733    {
734        // Scope for service lock
735        Mutex::Autolock lock(mServiceLock);
736        auto cameraState = getCameraState(id);
737        if (cameraState == nullptr) {
738            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
739            return BAD_VALUE;
740        }
741        CameraParameters p = cameraState->getShimParams();
742        if (!p.isEmpty()) {
743            *parameters = p;
744            return NO_ERROR;
745        }
746    }
747
748    int64_t token = IPCThreadState::self()->clearCallingIdentity();
749    ret = initializeShimMetadata(cameraId);
750    IPCThreadState::self()->restoreCallingIdentity(token);
751    if (ret != NO_ERROR) {
752        // Error already logged by callee
753        return ret;
754    }
755
756    // Check for parameters again
757    {
758        // Scope for service lock
759        Mutex::Autolock lock(mServiceLock);
760        auto cameraState = getCameraState(id);
761        if (cameraState == nullptr) {
762            ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string());
763            return BAD_VALUE;
764        }
765        CameraParameters p = cameraState->getShimParams();
766        if (!p.isEmpty()) {
767            *parameters = p;
768            return NO_ERROR;
769        }
770    }
771
772    ALOGE("%s: Parameters were not initialized, or were empty.  Device may not be present.",
773            __FUNCTION__);
774    return INVALID_OPERATION;
775}
776
777status_t CameraService::validateConnectLocked(const String8& cameraId, /*inout*/int& clientUid)
778        const {
779
780    int callingPid = getCallingPid();
781
782    if (clientUid == USE_CALLING_UID) {
783        clientUid = getCallingUid();
784    } else {
785        // We only trust our own process to forward client UIDs
786        if (callingPid != getpid()) {
787            ALOGE("CameraService::connect X (PID %d) rejected (don't trust clientUid %d)",
788                    callingPid, clientUid);
789            return PERMISSION_DENIED;
790        }
791    }
792
793    if (!mModule) {
794        ALOGE("CameraService::connect X (PID %d) rejected (camera HAL module not loaded)",
795                callingPid);
796        return -ENODEV;
797    }
798
799    if (getCameraState(cameraId) == nullptr) {
800        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
801                cameraId.string());
802        return -ENODEV;
803    }
804
805    // Check device policy for this camera
806    char value[PROPERTY_VALUE_MAX];
807    char key[PROPERTY_KEY_MAX];
808    int clientUserId = multiuser_get_user_id(clientUid);
809    snprintf(key, PROPERTY_KEY_MAX, "sys.secpolicy.camera.off_%d", clientUserId);
810    property_get(key, value, "0");
811    if (strcmp(value, "1") == 0) {
812        // Camera is disabled by DevicePolicyManager.
813        ALOGE("CameraService::connect X (PID %d) rejected (camera %s is disabled by device "
814                "policy)", callingPid, cameraId.string());
815        return -EACCES;
816    }
817
818    // Only allow clients who are being used by the current foreground device user, unless calling
819    // from our own process.
820    if (callingPid != getpid() &&
821            (mLastUserId != clientUserId && mLastUserId != DEFAULT_LAST_USER_ID)) {
822        ALOGE("CameraService::connect X (PID %d) rejected (cannot connect from previous "
823                "device user %d, current device user %d)", callingPid, clientUserId, mLastUserId);
824        return PERMISSION_DENIED;
825    }
826
827    return checkIfDeviceIsUsable(cameraId);
828}
829
830status_t CameraService::checkIfDeviceIsUsable(const String8& cameraId) const {
831    auto cameraState = getCameraState(cameraId);
832    int callingPid = getCallingPid();
833    if (cameraState == nullptr) {
834        ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid,
835                cameraId.string());
836        return -ENODEV;
837    }
838
839    ICameraServiceListener::Status currentStatus = cameraState->getStatus();
840    if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
841        ALOGE("CameraService::connect X (PID %d) rejected (camera %s is not connected)",
842                callingPid, cameraId.string());
843        return -ENODEV;
844    } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
845        ALOGE("CameraService::connect X (PID %d) rejected, (camera %s is initializing)",
846                callingPid, cameraId.string());
847        return -EBUSY;
848    }
849
850    return NO_ERROR;
851}
852
853void CameraService::finishConnectLocked(const sp<BasicClient>& client,
854        const CameraService::DescriptorPtr& desc) {
855
856    // Make a descriptor for the incoming client
857    auto clientDescriptor = CameraService::CameraClientManager::makeClientDescriptor(client, desc);
858    auto evicted = mActiveClientManager.addAndEvict(clientDescriptor);
859
860    logConnected(desc->getKey(), static_cast<int>(desc->getOwnerId()),
861            String8(client->getPackageName()));
862
863    if (evicted.size() > 0) {
864        // This should never happen - clients should already have been removed in disconnect
865        for (auto& i : evicted) {
866            ALOGE("%s: Invalid state: Client for camera %s was not removed in disconnect",
867                    __FUNCTION__, i->getKey().string());
868        }
869
870        LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, clients not evicted properly",
871                __FUNCTION__);
872    }
873}
874
875status_t CameraService::handleEvictionsLocked(const String8& cameraId, int clientPid,
876        apiLevel effectiveApiLevel, const sp<IBinder>& remoteCallback, const String8& packageName,
877        /*out*/
878        sp<BasicClient>* client,
879        std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>* partial) {
880
881    status_t ret = NO_ERROR;
882    std::vector<DescriptorPtr> evictedClients;
883    DescriptorPtr clientDescriptor;
884    {
885        if (effectiveApiLevel == API_1) {
886            // If we are using API1, any existing client for this camera ID with the same remote
887            // should be returned rather than evicted to allow MediaRecorder to work properly.
888
889            auto current = mActiveClientManager.get(cameraId);
890            if (current != nullptr) {
891                auto clientSp = current->getValue();
892                if (clientSp.get() != nullptr) { // should never be needed
893                    if (clientSp->getRemote() == remoteCallback) {
894                        ALOGI("CameraService::connect X (PID %d) (second call from same"
895                                "app binder, returning the same client)", clientPid);
896                        *client = clientSp;
897                        return NO_ERROR;
898                    }
899                }
900            }
901        }
902
903        // Return error if the device was unplugged or removed by the HAL for some reason
904        if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) {
905            return ret;
906        }
907
908        // Get current active client PIDs
909        std::vector<int> ownerPids(mActiveClientManager.getAllOwners());
910        ownerPids.push_back(clientPid);
911
912        // Use the value +PROCESS_STATE_NONEXISTENT, to avoid taking
913        // address of PROCESS_STATE_NONEXISTENT as a reference argument
914        // for the vector constructor. PROCESS_STATE_NONEXISTENT does
915        // not have an out-of-class definition.
916        std::vector<int> priorities(ownerPids.size(), +PROCESS_STATE_NONEXISTENT);
917
918        // Get priorites of all active PIDs
919        ProcessInfoService::getProcessStatesFromPids(ownerPids.size(), &ownerPids[0],
920                /*out*/&priorities[0]);
921
922        // Update all active clients' priorities
923        std::map<int,int> pidToPriorityMap;
924        for (size_t i = 0; i < ownerPids.size() - 1; i++) {
925            pidToPriorityMap.emplace(ownerPids[i], getCameraPriorityFromProcState(priorities[i]));
926        }
927        mActiveClientManager.updatePriorities(pidToPriorityMap);
928
929        // Get state for the given cameraId
930        auto state = getCameraState(cameraId);
931        if (state == nullptr) {
932            ALOGE("CameraService::connect X (PID %d) rejected (no camera device with ID %s)",
933                clientPid, cameraId.string());
934            return BAD_VALUE;
935        }
936
937        // Make descriptor for incoming client
938        clientDescriptor = CameraClientManager::makeClientDescriptor(cameraId,
939                sp<BasicClient>{nullptr}, static_cast<int32_t>(state->getCost()),
940                state->getConflicting(),
941                getCameraPriorityFromProcState(priorities[priorities.size() - 1]), clientPid);
942
943        // Find clients that would be evicted
944        auto evicted = mActiveClientManager.wouldEvict(clientDescriptor);
945
946        // If the incoming client was 'evicted,' higher priority clients have the camera in the
947        // background, so we cannot do evictions
948        if (std::find(evicted.begin(), evicted.end(), clientDescriptor) != evicted.end()) {
949            ALOGE("CameraService::connect X (PID %d) rejected (existing client(s) with higher"
950                    " priority).", clientPid);
951
952            sp<BasicClient> clientSp = clientDescriptor->getValue();
953            String8 curTime = getFormattedCurrentTime();
954            auto incompatibleClients =
955                    mActiveClientManager.getIncompatibleClients(clientDescriptor);
956
957            String8 msg = String8::format("%s : DENIED connect device %s client for package %s "
958                    "(PID %d, priority %d) due to eviction policy", curTime.string(),
959                    cameraId.string(), packageName.string(), clientPid,
960                    getCameraPriorityFromProcState(priorities[priorities.size() - 1]));
961
962            for (auto& i : incompatibleClients) {
963                msg.appendFormat("\n   - Blocked by existing device %s client for package %s"
964                        "(PID %" PRId32 ", priority %" PRId32 ")", i->getKey().string(),
965                        String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(),
966                        i->getPriority());
967            }
968
969            // Log the client's attempt
970            Mutex::Autolock l(mLogLock);
971            mEventLog.add(msg);
972
973            return -EBUSY;
974        }
975
976        for (auto& i : evicted) {
977            sp<BasicClient> clientSp = i->getValue();
978            if (clientSp.get() == nullptr) {
979                ALOGE("%s: Invalid state: Null client in active client list.", __FUNCTION__);
980
981                // TODO: Remove this
982                LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, null client in active list",
983                        __FUNCTION__);
984                mActiveClientManager.remove(i);
985                continue;
986            }
987
988            ALOGE("CameraService::connect evicting conflicting client for camera ID %s",
989                    i->getKey().string());
990            evictedClients.push_back(i);
991
992            // Log the clients evicted
993            logEvent(String8::format("EVICT device %s client held by package %s (PID"
994                    " %" PRId32 ", priority %" PRId32 ")\n   - Evicted by device %s client for"
995                    " package %s (PID %d, priority %" PRId32 ")",
996                    i->getKey().string(), String8{clientSp->getPackageName()}.string(),
997                    i->getOwnerId(), i->getPriority(), cameraId.string(),
998                    packageName.string(), clientPid,
999                    getCameraPriorityFromProcState(priorities[priorities.size() - 1])));
1000
1001            // Notify the client of disconnection
1002            clientSp->notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
1003                    CaptureResultExtras());
1004        }
1005    }
1006
1007    // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1008    // other clients from connecting in mServiceLockWrapper if held
1009    mServiceLock.unlock();
1010
1011    // Clear caller identity temporarily so client disconnect PID checks work correctly
1012    int64_t token = IPCThreadState::self()->clearCallingIdentity();
1013
1014    // Destroy evicted clients
1015    for (auto& i : evictedClients) {
1016        // Disconnect is blocking, and should only have returned when HAL has cleaned up
1017        i->getValue()->disconnect(); // Clients will remove themselves from the active client list
1018    }
1019
1020    IPCThreadState::self()->restoreCallingIdentity(token);
1021
1022    for (const auto& i : evictedClients) {
1023        ALOGV("%s: Waiting for disconnect to complete for client for device %s (PID %" PRId32 ")",
1024                __FUNCTION__, i->getKey().string(), i->getOwnerId());
1025        ret = mActiveClientManager.waitUntilRemoved(i, DEFAULT_DISCONNECT_TIMEOUT_NS);
1026        if (ret == TIMED_OUT) {
1027            ALOGE("%s: Timed out waiting for client for device %s to disconnect, "
1028                    "current clients:\n%s", __FUNCTION__, i->getKey().string(),
1029                    mActiveClientManager.toString().string());
1030            return -EBUSY;
1031        }
1032        if (ret != NO_ERROR) {
1033            ALOGE("%s: Received error waiting for client for device %s to disconnect: %s (%d), "
1034                    "current clients:\n%s", __FUNCTION__, i->getKey().string(), strerror(-ret),
1035                    ret, mActiveClientManager.toString().string());
1036            return ret;
1037        }
1038    }
1039
1040    evictedClients.clear();
1041
1042    // Once clients have been disconnected, relock
1043    mServiceLock.lock();
1044
1045    // Check again if the device was unplugged or something while we weren't holding mServiceLock
1046    if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) {
1047        return ret;
1048    }
1049
1050    *partial = clientDescriptor;
1051    return NO_ERROR;
1052}
1053
1054status_t CameraService::connect(
1055        const sp<ICameraClient>& cameraClient,
1056        int cameraId,
1057        const String16& clientPackageName,
1058        int clientUid,
1059        /*out*/
1060        sp<ICamera>& device) {
1061
1062    status_t ret = NO_ERROR;
1063    String8 id = String8::format("%d", cameraId);
1064    sp<Client> client = nullptr;
1065    ret = connectHelper<ICameraClient,Client>(cameraClient, id, CAMERA_HAL_API_VERSION_UNSPECIFIED,
1066            clientPackageName, clientUid, API_1, false, false, /*out*/client);
1067
1068    if(ret != NO_ERROR) {
1069        logRejected(id, getCallingPid(), String8(clientPackageName),
1070                String8::format("%s (%d)", strerror(-ret), ret));
1071        return ret;
1072    }
1073
1074    device = client;
1075    return NO_ERROR;
1076}
1077
1078status_t CameraService::connectLegacy(
1079        const sp<ICameraClient>& cameraClient,
1080        int cameraId, int halVersion,
1081        const String16& clientPackageName,
1082        int clientUid,
1083        /*out*/
1084        sp<ICamera>& device) {
1085
1086    String8 id = String8::format("%d", cameraId);
1087    int apiVersion = mModule->getModuleApiVersion();
1088    if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED &&
1089            apiVersion < CAMERA_MODULE_API_VERSION_2_3) {
1090        /*
1091         * Either the HAL version is unspecified in which case this just creates
1092         * a camera client selected by the latest device version, or
1093         * it's a particular version in which case the HAL must supported
1094         * the open_legacy call
1095         */
1096        ALOGE("%s: camera HAL module version %x doesn't support connecting to legacy HAL devices!",
1097                __FUNCTION__, apiVersion);
1098        logRejected(id, getCallingPid(), String8(clientPackageName),
1099                String8("HAL module version doesn't support legacy HAL connections"));
1100        return INVALID_OPERATION;
1101    }
1102
1103    status_t ret = NO_ERROR;
1104    sp<Client> client = nullptr;
1105    ret = connectHelper<ICameraClient,Client>(cameraClient, id, halVersion, clientPackageName,
1106            clientUid, API_1, true, false, /*out*/client);
1107
1108    if(ret != NO_ERROR) {
1109        logRejected(id, getCallingPid(), String8(clientPackageName),
1110                String8::format("%s (%d)", strerror(-ret), ret));
1111        return ret;
1112    }
1113
1114    device = client;
1115    return NO_ERROR;
1116}
1117
1118status_t CameraService::connectDevice(
1119        const sp<ICameraDeviceCallbacks>& cameraCb,
1120        int cameraId,
1121        const String16& clientPackageName,
1122        int clientUid,
1123        /*out*/
1124        sp<ICameraDeviceUser>& device) {
1125
1126    status_t ret = NO_ERROR;
1127    String8 id = String8::format("%d", cameraId);
1128    sp<CameraDeviceClient> client = nullptr;
1129    ret = connectHelper<ICameraDeviceCallbacks,CameraDeviceClient>(cameraCb, id,
1130            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, clientUid, API_2, false, false,
1131            /*out*/client);
1132
1133    if(ret != NO_ERROR) {
1134        logRejected(id, getCallingPid(), String8(clientPackageName),
1135                String8::format("%s (%d)", strerror(-ret), ret));
1136        return ret;
1137    }
1138
1139    device = client;
1140    return NO_ERROR;
1141}
1142
1143status_t CameraService::setTorchMode(const String16& cameraId, bool enabled,
1144        const sp<IBinder>& clientBinder) {
1145    if (enabled && clientBinder == NULL) {
1146        ALOGE("%s: torch client binder is NULL", __FUNCTION__);
1147        return -EINVAL;
1148    }
1149
1150    String8 id = String8(cameraId.string());
1151
1152    // verify id is valid.
1153    auto state = getCameraState(id);
1154    if (state == nullptr) {
1155        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1156        return -EINVAL;
1157    }
1158
1159    ICameraServiceListener::Status cameraStatus = state->getStatus();
1160    if (cameraStatus != ICameraServiceListener::STATUS_PRESENT &&
1161            cameraStatus != ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1162        ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
1163        return -EINVAL;
1164    }
1165
1166    {
1167        Mutex::Autolock al(mTorchStatusMutex);
1168        ICameraServiceListener::TorchStatus status;
1169        status_t res = getTorchStatusLocked(id, &status);
1170        if (res) {
1171            ALOGE("%s: getting current torch status failed for camera %s",
1172                    __FUNCTION__, id.string());
1173            return -EINVAL;
1174        }
1175
1176        if (status == ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE) {
1177            if (cameraStatus == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1178                ALOGE("%s: torch mode of camera %s is not available because "
1179                        "camera is in use", __FUNCTION__, id.string());
1180                return -EBUSY;
1181            } else {
1182                ALOGE("%s: torch mode of camera %s is not available due to "
1183                        "insufficient resources", __FUNCTION__, id.string());
1184                return -EUSERS;
1185            }
1186        }
1187    }
1188
1189    status_t res = mFlashlight->setTorchMode(id, enabled);
1190    if (res) {
1191        ALOGE("%s: setting torch mode of camera %s to %d failed. %s (%d)",
1192                __FUNCTION__, id.string(), enabled, strerror(-res), res);
1193        return res;
1194    }
1195
1196    {
1197        // update the link to client's death
1198        Mutex::Autolock al(mTorchClientMapMutex);
1199        ssize_t index = mTorchClientMap.indexOfKey(id);
1200        if (enabled) {
1201            if (index == NAME_NOT_FOUND) {
1202                mTorchClientMap.add(id, clientBinder);
1203            } else {
1204                const sp<IBinder> oldBinder = mTorchClientMap.valueAt(index);
1205                oldBinder->unlinkToDeath(this);
1206
1207                mTorchClientMap.replaceValueAt(index, clientBinder);
1208            }
1209            clientBinder->linkToDeath(this);
1210        } else if (index != NAME_NOT_FOUND) {
1211            sp<IBinder> oldBinder = mTorchClientMap.valueAt(index);
1212            oldBinder->unlinkToDeath(this);
1213        }
1214    }
1215
1216    return OK;
1217}
1218
1219void CameraService::notifySystemEvent(int eventId, int arg0) {
1220    switch(eventId) {
1221        case ICameraService::USER_SWITCHED: {
1222            doUserSwitch(/*newUserId*/arg0);
1223            break;
1224        }
1225        case ICameraService::NO_EVENT:
1226        default: {
1227            ALOGW("%s: Received invalid system event from system_server: %d", __FUNCTION__,
1228                    eventId);
1229            break;
1230        }
1231    }
1232}
1233
1234status_t CameraService::addListener(
1235                                const sp<ICameraServiceListener>& listener) {
1236    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
1237
1238    if (listener == 0) {
1239        ALOGE("%s: Listener must not be null", __FUNCTION__);
1240        return BAD_VALUE;
1241    }
1242
1243    Mutex::Autolock lock(mServiceLock);
1244
1245    {
1246        Mutex::Autolock lock(mStatusListenerLock);
1247        for (auto& it : mListenerList) {
1248            if (IInterface::asBinder(it) == IInterface::asBinder(listener)) {
1249                ALOGW("%s: Tried to add listener %p which was already subscribed",
1250                      __FUNCTION__, listener.get());
1251                return ALREADY_EXISTS;
1252            }
1253        }
1254
1255        mListenerList.push_back(listener);
1256    }
1257
1258
1259    /* Immediately signal current status to this listener only */
1260    {
1261        Mutex::Autolock lock(mCameraStatesLock);
1262        for (auto& i : mCameraStates) {
1263            // TODO: Update binder to use String16 for camera IDs and remove;
1264            int id = cameraIdToInt(i.first);
1265            if (id == -1) continue;
1266
1267            listener->onStatusChanged(i.second->getStatus(), id);
1268        }
1269    }
1270
1271    /* Immediately signal current torch status to this listener only */
1272    {
1273        Mutex::Autolock al(mTorchStatusMutex);
1274        for (size_t i = 0; i < mTorchStatusMap.size(); i++ ) {
1275            String16 id = String16(mTorchStatusMap.keyAt(i).string());
1276            listener->onTorchStatusChanged(mTorchStatusMap.valueAt(i), id);
1277        }
1278    }
1279
1280    return OK;
1281}
1282
1283status_t CameraService::removeListener(const sp<ICameraServiceListener>& listener) {
1284    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
1285
1286    if (listener == 0) {
1287        ALOGE("%s: Listener must not be null", __FUNCTION__);
1288        return BAD_VALUE;
1289    }
1290
1291    Mutex::Autolock lock(mServiceLock);
1292
1293    {
1294        Mutex::Autolock lock(mStatusListenerLock);
1295        for (auto it = mListenerList.begin(); it != mListenerList.end(); it++) {
1296            if (IInterface::asBinder(*it) == IInterface::asBinder(listener)) {
1297                mListenerList.erase(it);
1298                return OK;
1299            }
1300        }
1301    }
1302
1303    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
1304          __FUNCTION__, listener.get());
1305
1306    return BAD_VALUE;
1307}
1308
1309status_t CameraService::getLegacyParameters(int cameraId, /*out*/String16* parameters) {
1310    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1311
1312    if (parameters == NULL) {
1313        ALOGE("%s: parameters must not be null", __FUNCTION__);
1314        return BAD_VALUE;
1315    }
1316
1317    status_t ret = 0;
1318
1319    CameraParameters shimParams;
1320    if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) {
1321        // Error logged by caller
1322        return ret;
1323    }
1324
1325    String8 shimParamsString8 = shimParams.flatten();
1326    String16 shimParamsString16 = String16(shimParamsString8);
1327
1328    *parameters = shimParamsString16;
1329
1330    return OK;
1331}
1332
1333status_t CameraService::supportsCameraApi(int cameraId, int apiVersion) {
1334    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1335
1336    switch (apiVersion) {
1337        case API_VERSION_1:
1338        case API_VERSION_2:
1339            break;
1340        default:
1341            ALOGE("%s: Bad API version %d", __FUNCTION__, apiVersion);
1342            return BAD_VALUE;
1343    }
1344
1345    int facing = -1;
1346    int deviceVersion = getDeviceVersion(cameraId, &facing);
1347
1348    switch(deviceVersion) {
1349      case CAMERA_DEVICE_API_VERSION_1_0:
1350      case CAMERA_DEVICE_API_VERSION_2_0:
1351      case CAMERA_DEVICE_API_VERSION_2_1:
1352      case CAMERA_DEVICE_API_VERSION_3_0:
1353      case CAMERA_DEVICE_API_VERSION_3_1:
1354        if (apiVersion == API_VERSION_2) {
1355            ALOGV("%s: Camera id %d uses HAL prior to HAL3.2, doesn't support api2 without shim",
1356                    __FUNCTION__, cameraId);
1357            return -EOPNOTSUPP;
1358        } else { // if (apiVersion == API_VERSION_1) {
1359            ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported",
1360                    __FUNCTION__, cameraId);
1361            return OK;
1362        }
1363      case CAMERA_DEVICE_API_VERSION_3_2:
1364      case CAMERA_DEVICE_API_VERSION_3_3:
1365        ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly",
1366                __FUNCTION__, cameraId);
1367        return OK;
1368      case -1:
1369        ALOGE("%s: Invalid camera id %d", __FUNCTION__, cameraId);
1370        return BAD_VALUE;
1371      default:
1372        ALOGE("%s: Unknown camera device HAL version: %d", __FUNCTION__, deviceVersion);
1373        return INVALID_OPERATION;
1374    }
1375
1376    return OK;
1377}
1378
1379void CameraService::removeByClient(const BasicClient* client) {
1380    Mutex::Autolock lock(mServiceLock);
1381    for (auto& i : mActiveClientManager.getAll()) {
1382        auto clientSp = i->getValue();
1383        if (clientSp.get() == client) {
1384            mActiveClientManager.remove(i);
1385        }
1386    }
1387}
1388
1389bool CameraService::evictClientIdByRemote(const wp<IBinder>& remote) {
1390    const int callingPid = getCallingPid();
1391    const int servicePid = getpid();
1392    bool ret = false;
1393    {
1394        // Acquire mServiceLock and prevent other clients from connecting
1395        std::unique_ptr<AutoConditionLock> lock =
1396                AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1397
1398
1399        std::vector<sp<BasicClient>> evicted;
1400        for (auto& i : mActiveClientManager.getAll()) {
1401            auto clientSp = i->getValue();
1402            if (clientSp.get() == nullptr) {
1403                ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1404                mActiveClientManager.remove(i);
1405                continue;
1406            }
1407            if (remote == clientSp->getRemote() && (callingPid == servicePid ||
1408                    callingPid == clientSp->getClientPid())) {
1409                mActiveClientManager.remove(i);
1410                evicted.push_back(clientSp);
1411
1412                // Notify the client of disconnection
1413                clientSp->notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED,
1414                        CaptureResultExtras());
1415            }
1416        }
1417
1418        // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking
1419        // other clients from connecting in mServiceLockWrapper if held
1420        mServiceLock.unlock();
1421
1422        // Do not clear caller identity, remote caller should be client proccess
1423
1424        for (auto& i : evicted) {
1425            if (i.get() != nullptr) {
1426                i->disconnect();
1427                ret = true;
1428            }
1429        }
1430
1431        // Reacquire mServiceLock
1432        mServiceLock.lock();
1433
1434    } // lock is destroyed, allow further connect calls
1435
1436    return ret;
1437}
1438
1439
1440std::shared_ptr<CameraService::CameraState> CameraService::getCameraState(
1441        const String8& cameraId) const {
1442    std::shared_ptr<CameraState> state;
1443    {
1444        Mutex::Autolock lock(mCameraStatesLock);
1445        auto iter = mCameraStates.find(cameraId);
1446        if (iter != mCameraStates.end()) {
1447            state = iter->second;
1448        }
1449    }
1450    return state;
1451}
1452
1453sp<CameraService::BasicClient> CameraService::removeClientLocked(const String8& cameraId) {
1454    // Remove from active clients list
1455    auto clientDescriptorPtr = mActiveClientManager.remove(cameraId);
1456    if (clientDescriptorPtr == nullptr) {
1457        ALOGW("%s: Could not evict client, no client for camera ID %s", __FUNCTION__,
1458                cameraId.string());
1459        return sp<BasicClient>{nullptr};
1460    }
1461
1462    return clientDescriptorPtr->getValue();
1463}
1464
1465void CameraService::doUserSwitch(int newUserId) {
1466    // Acquire mServiceLock and prevent other clients from connecting
1467    std::unique_ptr<AutoConditionLock> lock =
1468            AutoConditionLock::waitAndAcquire(mServiceLockWrapper);
1469
1470    if (newUserId <= 0) {
1471        ALOGW("%s: Bad user ID %d given during user switch, resetting to default.", __FUNCTION__,
1472                newUserId);
1473        newUserId = DEFAULT_LAST_USER_ID;
1474    }
1475
1476    logUserSwitch(mLastUserId, newUserId);
1477
1478    mLastUserId = newUserId;
1479
1480    // Current user has switched, evict all current clients.
1481    std::vector<sp<BasicClient>> evicted;
1482    for (auto& i : mActiveClientManager.getAll()) {
1483        auto clientSp = i->getValue();
1484
1485        if (clientSp.get() == nullptr) {
1486            ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__);
1487            continue;
1488        }
1489
1490        evicted.push_back(clientSp);
1491
1492        String8 curTime = getFormattedCurrentTime();
1493
1494        ALOGE("Evicting conflicting client for camera ID %s due to user change",
1495                i->getKey().string());
1496
1497        // Log the clients evicted
1498        logEvent(String8::format("EVICT device %s client held by package %s (PID %"
1499                PRId32 ", priority %" PRId32 ")\n   - Evicted due to user switch.",
1500                i->getKey().string(), String8{clientSp->getPackageName()}.string(),
1501                i->getOwnerId(), i->getPriority()));
1502
1503    }
1504
1505    // Do not hold mServiceLock while disconnecting clients, but retain the condition
1506    // blocking other clients from connecting in mServiceLockWrapper if held.
1507    mServiceLock.unlock();
1508
1509    // Clear caller identity temporarily so client disconnect PID checks work correctly
1510    int64_t token = IPCThreadState::self()->clearCallingIdentity();
1511
1512    for (auto& i : evicted) {
1513        i->disconnect();
1514    }
1515
1516    IPCThreadState::self()->restoreCallingIdentity(token);
1517
1518    // Reacquire mServiceLock
1519    mServiceLock.lock();
1520}
1521
1522void CameraService::logEvent(const char* event) {
1523    String8 curTime = getFormattedCurrentTime();
1524    Mutex::Autolock l(mLogLock);
1525    mEventLog.add(String8::format("%s : %s", curTime.string(), event));
1526}
1527
1528void CameraService::logDisconnected(const char* cameraId, int clientPid,
1529        const char* clientPackage) {
1530    // Log the clients evicted
1531    logEvent(String8::format("DISCONNECT device %s client for package %s (PID %d)", cameraId,
1532            clientPackage, clientPid));
1533}
1534
1535void CameraService::logConnected(const char* cameraId, int clientPid,
1536        const char* clientPackage) {
1537    // Log the clients evicted
1538    logEvent(String8::format("CONNECT device %s client for package %s (PID %d)", cameraId,
1539            clientPackage, clientPid));
1540}
1541
1542void CameraService::logRejected(const char* cameraId, int clientPid,
1543        const char* clientPackage, const char* reason) {
1544    // Log the client rejected
1545    logEvent(String8::format("REJECT device %s client for package %s (PID %d), reason: (%s)",
1546            cameraId, clientPackage, clientPid, reason));
1547}
1548
1549void CameraService::logUserSwitch(int oldUserId, int newUserId) {
1550    // Log the new and old users
1551    logEvent(String8::format("USER_SWITCH from old user: %d , to new user: %d", oldUserId,
1552            newUserId));
1553}
1554
1555void CameraService::logDeviceRemoved(const char* cameraId, const char* reason) {
1556    // Log the device removal
1557    logEvent(String8::format("REMOVE device %s, reason: (%s)", cameraId, reason));
1558}
1559
1560void CameraService::logDeviceAdded(const char* cameraId, const char* reason) {
1561    // Log the device removal
1562    logEvent(String8::format("ADD device %s, reason: (%s)", cameraId, reason));
1563}
1564
1565void CameraService::logClientDied(int clientPid, const char* reason) {
1566    // Log the device removal
1567    logEvent(String8::format("DIED client(s) with PID %d, reason: (%s)", clientPid, reason));
1568}
1569
1570void CameraService::logServiceError(const char* msg, int errorCode) {
1571    String8 curTime = getFormattedCurrentTime();
1572    logEvent(String8::format("SERVICE ERROR: %s : %d (%s)", msg, errorCode, strerror(errorCode)));
1573}
1574
1575status_t CameraService::onTransact(uint32_t code, const Parcel& data, Parcel* reply,
1576        uint32_t flags) {
1577
1578    const int pid = getCallingPid();
1579    const int selfPid = getpid();
1580
1581    // Permission checks
1582    switch (code) {
1583        case BnCameraService::CONNECT:
1584        case BnCameraService::CONNECT_DEVICE:
1585        case BnCameraService::CONNECT_LEGACY: {
1586            if (pid != selfPid) {
1587                // we're called from a different process, do the real check
1588                if (!checkCallingPermission(
1589                        String16("android.permission.CAMERA"))) {
1590                    const int uid = getCallingUid();
1591                    ALOGE("Permission Denial: "
1592                         "can't use the camera pid=%d, uid=%d", pid, uid);
1593                    return PERMISSION_DENIED;
1594                }
1595            }
1596            break;
1597        }
1598        case BnCameraService::NOTIFY_SYSTEM_EVENT: {
1599            if (pid != selfPid) {
1600                // Ensure we're being called by system_server, or similar process with
1601                // permissions to notify the camera service about system events
1602                if (!checkCallingPermission(
1603                        String16("android.permission.CAMERA_SEND_SYSTEM_EVENTS"))) {
1604                    const int uid = getCallingUid();
1605                    ALOGE("Permission Denial: cannot send updates to camera service about system"
1606                            " events from pid=%d, uid=%d", pid, uid);
1607                    return PERMISSION_DENIED;
1608                }
1609            }
1610            break;
1611        }
1612    }
1613
1614    return BnCameraService::onTransact(code, data, reply, flags);
1615}
1616
1617// We share the media players for shutter and recording sound for all clients.
1618// A reference count is kept to determine when we will actually release the
1619// media players.
1620
1621MediaPlayer* CameraService::newMediaPlayer(const char *file) {
1622    MediaPlayer* mp = new MediaPlayer();
1623    if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) {
1624        mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
1625        mp->prepare();
1626    } else {
1627        ALOGE("Failed to load CameraService sounds: %s", file);
1628        return NULL;
1629    }
1630    return mp;
1631}
1632
1633void CameraService::loadSound() {
1634    Mutex::Autolock lock(mSoundLock);
1635    LOG1("CameraService::loadSound ref=%d", mSoundRef);
1636    if (mSoundRef++) return;
1637
1638    mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
1639    mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
1640}
1641
1642void CameraService::releaseSound() {
1643    Mutex::Autolock lock(mSoundLock);
1644    LOG1("CameraService::releaseSound ref=%d", mSoundRef);
1645    if (--mSoundRef) return;
1646
1647    for (int i = 0; i < NUM_SOUNDS; i++) {
1648        if (mSoundPlayer[i] != 0) {
1649            mSoundPlayer[i]->disconnect();
1650            mSoundPlayer[i].clear();
1651        }
1652    }
1653}
1654
1655void CameraService::playSound(sound_kind kind) {
1656    LOG1("playSound(%d)", kind);
1657    Mutex::Autolock lock(mSoundLock);
1658    sp<MediaPlayer> player = mSoundPlayer[kind];
1659    if (player != 0) {
1660        player->seekTo(0);
1661        player->start();
1662    }
1663}
1664
1665// ----------------------------------------------------------------------------
1666
1667CameraService::Client::Client(const sp<CameraService>& cameraService,
1668        const sp<ICameraClient>& cameraClient,
1669        const String16& clientPackageName,
1670        int cameraId, int cameraFacing,
1671        int clientPid, uid_t clientUid,
1672        int servicePid) :
1673        CameraService::BasicClient(cameraService,
1674                IInterface::asBinder(cameraClient),
1675                clientPackageName,
1676                cameraId, cameraFacing,
1677                clientPid, clientUid,
1678                servicePid)
1679{
1680    int callingPid = getCallingPid();
1681    LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
1682
1683    mRemoteCallback = cameraClient;
1684
1685    cameraService->loadSound();
1686
1687    LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
1688}
1689
1690// tear down the client
1691CameraService::Client::~Client() {
1692    ALOGV("~Client");
1693    mDestructionStarted = true;
1694
1695    mCameraService->releaseSound();
1696    // unconditionally disconnect. function is idempotent
1697    Client::disconnect();
1698}
1699
1700CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
1701        const sp<IBinder>& remoteCallback,
1702        const String16& clientPackageName,
1703        int cameraId, int cameraFacing,
1704        int clientPid, uid_t clientUid,
1705        int servicePid):
1706        mClientPackageName(clientPackageName), mDisconnected(false)
1707{
1708    mCameraService = cameraService;
1709    mRemoteBinder = remoteCallback;
1710    mCameraId = cameraId;
1711    mCameraFacing = cameraFacing;
1712    mClientPid = clientPid;
1713    mClientUid = clientUid;
1714    mServicePid = servicePid;
1715    mOpsActive = false;
1716    mDestructionStarted = false;
1717}
1718
1719CameraService::BasicClient::~BasicClient() {
1720    ALOGV("~BasicClient");
1721    mDestructionStarted = true;
1722}
1723
1724void CameraService::BasicClient::disconnect() {
1725    if (mDisconnected) {
1726        ALOGE("%s: Disconnect called on already disconnected client for device %d", __FUNCTION__,
1727                mCameraId);
1728        return;
1729    }
1730    mDisconnected = true;;
1731
1732    mCameraService->removeByClient(this);
1733    mCameraService->logDisconnected(String8::format("%d", mCameraId), mClientPid,
1734            String8(mClientPackageName));
1735
1736    sp<IBinder> remote = getRemote();
1737    if (remote != nullptr) {
1738        remote->unlinkToDeath(mCameraService);
1739    }
1740
1741    finishCameraOps();
1742    ALOGI("%s: Disconnected client for camera %d for PID %d", __FUNCTION__, mCameraId, mClientPid);
1743
1744    // client shouldn't be able to call into us anymore
1745    mClientPid = 0;
1746}
1747
1748String16 CameraService::BasicClient::getPackageName() const {
1749    return mClientPackageName;
1750}
1751
1752
1753int CameraService::BasicClient::getClientPid() const {
1754    return mClientPid;
1755}
1756
1757status_t CameraService::BasicClient::startCameraOps() {
1758    int32_t res;
1759    // Notify app ops that the camera is not available
1760    mOpsCallback = new OpsCallback(this);
1761
1762    {
1763        ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
1764              __FUNCTION__, String8(mClientPackageName).string(), mClientUid);
1765    }
1766
1767    mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
1768            mClientPackageName, mOpsCallback);
1769    res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
1770            mClientUid, mClientPackageName);
1771
1772    if (res != AppOpsManager::MODE_ALLOWED) {
1773        ALOGI("Camera %d: Access for \"%s\" has been revoked",
1774                mCameraId, String8(mClientPackageName).string());
1775        return PERMISSION_DENIED;
1776    }
1777
1778    mOpsActive = true;
1779
1780    // Transition device availability listeners from PRESENT -> NOT_AVAILABLE
1781    mCameraService->updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
1782            String8::format("%d", mCameraId));
1783
1784    return OK;
1785}
1786
1787status_t CameraService::BasicClient::finishCameraOps() {
1788    // Check if startCameraOps succeeded, and if so, finish the camera op
1789    if (mOpsActive) {
1790        // Notify app ops that the camera is available again
1791        mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
1792                mClientPackageName);
1793        mOpsActive = false;
1794
1795        auto rejected = {ICameraServiceListener::STATUS_NOT_PRESENT,
1796                ICameraServiceListener::STATUS_ENUMERATING};
1797
1798        // Transition to PRESENT if the camera is not in either of the rejected states
1799        mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
1800                String8::format("%d", mCameraId), rejected);
1801
1802        // Notify flashlight that a camera device is closed.
1803        mCameraService->mFlashlight->deviceClosed(
1804                String8::format("%d", mCameraId));
1805    }
1806    // Always stop watching, even if no camera op is active
1807    if (mOpsCallback != NULL) {
1808        mAppOpsManager.stopWatchingMode(mOpsCallback);
1809    }
1810    mOpsCallback.clear();
1811
1812    return OK;
1813}
1814
1815void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
1816    String8 name(packageName);
1817    String8 myName(mClientPackageName);
1818
1819    if (op != AppOpsManager::OP_CAMERA) {
1820        ALOGW("Unexpected app ops notification received: %d", op);
1821        return;
1822    }
1823
1824    int32_t res;
1825    res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
1826            mClientUid, mClientPackageName);
1827    ALOGV("checkOp returns: %d, %s ", res,
1828            res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
1829            res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
1830            res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
1831            "UNKNOWN");
1832
1833    if (res != AppOpsManager::MODE_ALLOWED) {
1834        ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
1835                myName.string());
1836        // Reset the client PID to allow server-initiated disconnect,
1837        // and to prevent further calls by client.
1838        mClientPid = getCallingPid();
1839        CaptureResultExtras resultExtras; // a dummy result (invalid)
1840        notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras);
1841        disconnect();
1842    }
1843}
1844
1845// ----------------------------------------------------------------------------
1846
1847// Provide client strong pointer for callbacks.
1848sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) {
1849    String8 cameraId = String8::format("%d", (int)(intptr_t) user);
1850    auto clientDescriptor = gCameraService->mActiveClientManager.get(cameraId);
1851    if (clientDescriptor != nullptr) {
1852        return sp<Client>{
1853                static_cast<Client*>(clientDescriptor->getValue().get())};
1854    }
1855    return sp<Client>{nullptr};
1856}
1857
1858void CameraService::Client::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1859        const CaptureResultExtras& resultExtras) {
1860    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1861}
1862
1863// NOTE: function is idempotent
1864void CameraService::Client::disconnect() {
1865    ALOGV("Client::disconnect");
1866    BasicClient::disconnect();
1867}
1868
1869CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
1870        mClient(client) {
1871}
1872
1873void CameraService::Client::OpsCallback::opChanged(int32_t op,
1874        const String16& packageName) {
1875    sp<BasicClient> client = mClient.promote();
1876    if (client != NULL) {
1877        client->opChanged(op, packageName);
1878    }
1879}
1880
1881// ----------------------------------------------------------------------------
1882//                  CameraState
1883// ----------------------------------------------------------------------------
1884
1885CameraService::CameraState::CameraState(const String8& id, int cost,
1886        const std::set<String8>& conflicting) : mId(id),
1887        mStatus(ICameraServiceListener::STATUS_PRESENT), mCost(cost), mConflicting(conflicting) {}
1888
1889CameraService::CameraState::~CameraState() {}
1890
1891ICameraServiceListener::Status CameraService::CameraState::getStatus() const {
1892    Mutex::Autolock lock(mStatusLock);
1893    return mStatus;
1894}
1895
1896CameraParameters CameraService::CameraState::getShimParams() const {
1897    return mShimParams;
1898}
1899
1900void CameraService::CameraState::setShimParams(const CameraParameters& params) {
1901    mShimParams = params;
1902}
1903
1904int CameraService::CameraState::getCost() const {
1905    return mCost;
1906}
1907
1908std::set<String8> CameraService::CameraState::getConflicting() const {
1909    return mConflicting;
1910}
1911
1912String8 CameraService::CameraState::getId() const {
1913    return mId;
1914}
1915
1916// ----------------------------------------------------------------------------
1917//                  CameraClientManager
1918// ----------------------------------------------------------------------------
1919
1920CameraService::CameraClientManager::~CameraClientManager() {}
1921
1922sp<CameraService::BasicClient> CameraService::CameraClientManager::getCameraClient(
1923        const String8& id) const {
1924    auto descriptor = get(id);
1925    if (descriptor == nullptr) {
1926        return sp<BasicClient>{nullptr};
1927    }
1928    return descriptor->getValue();
1929}
1930
1931String8 CameraService::CameraClientManager::toString() const {
1932    auto all = getAll();
1933    String8 ret("[");
1934    bool hasAny = false;
1935    for (auto& i : all) {
1936        hasAny = true;
1937        String8 key = i->getKey();
1938        int32_t cost = i->getCost();
1939        int32_t pid = i->getOwnerId();
1940        int32_t priority = i->getPriority();
1941        auto conflicting = i->getConflicting();
1942        auto clientSp = i->getValue();
1943        String8 packageName;
1944        if (clientSp.get() != nullptr) {
1945            packageName = String8{clientSp->getPackageName()};
1946        }
1947        ret.appendFormat("\n(Camera ID: %s, Cost: %" PRId32 ", PID: %" PRId32 ", Priority: %"
1948                PRId32 ", ", key.string(), cost, pid, priority);
1949
1950        if (packageName.size() != 0) {
1951            ret.appendFormat("Client Package Name: %s", packageName.string());
1952        }
1953
1954        ret.append(", Conflicting Client Devices: {");
1955        for (auto& j : conflicting) {
1956            ret.appendFormat("%s, ", j.string());
1957        }
1958        ret.append("})");
1959    }
1960    if (hasAny) ret.append("\n");
1961    ret.append("]\n");
1962    return ret;
1963}
1964
1965CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor(
1966        const String8& key, const sp<BasicClient>& value, int32_t cost,
1967        const std::set<String8>& conflictingKeys, int32_t priority, int32_t ownerId) {
1968
1969    return std::make_shared<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>(
1970            key, value, cost, conflictingKeys, priority, ownerId);
1971}
1972
1973CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor(
1974        const sp<BasicClient>& value, const CameraService::DescriptorPtr& partial) {
1975    return makeClientDescriptor(partial->getKey(), value, partial->getCost(),
1976            partial->getConflicting(), partial->getPriority(), partial->getOwnerId());
1977}
1978
1979// ----------------------------------------------------------------------------
1980
1981static const int kDumpLockRetries = 50;
1982static const int kDumpLockSleep = 60000;
1983
1984static bool tryLock(Mutex& mutex)
1985{
1986    bool locked = false;
1987    for (int i = 0; i < kDumpLockRetries; ++i) {
1988        if (mutex.tryLock() == NO_ERROR) {
1989            locked = true;
1990            break;
1991        }
1992        usleep(kDumpLockSleep);
1993    }
1994    return locked;
1995}
1996
1997status_t CameraService::dump(int fd, const Vector<String16>& args) {
1998    String8 result("Dump of the Camera Service:\n");
1999    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
2000        result.appendFormat("Permission Denial: "
2001                "can't dump CameraService from pid=%d, uid=%d\n",
2002                getCallingPid(),
2003                getCallingUid());
2004        write(fd, result.string(), result.size());
2005    } else {
2006        bool locked = tryLock(mServiceLock);
2007        // failed to lock - CameraService is probably deadlocked
2008        if (!locked) {
2009            result.append("CameraService may be deadlocked\n");
2010            write(fd, result.string(), result.size());
2011        }
2012
2013        bool hasClient = false;
2014        if (!mModule) {
2015            result = String8::format("No camera module available!\n");
2016            write(fd, result.string(), result.size());
2017
2018            // Dump event log for error information
2019            dumpEventLog(fd);
2020
2021            if (locked) mServiceLock.unlock();
2022            return NO_ERROR;
2023        }
2024
2025        result = String8::format("Camera module HAL API version: 0x%x\n", mModule->getHalApiVersion());
2026        result.appendFormat("Camera module API version: 0x%x\n", mModule->getModuleApiVersion());
2027        result.appendFormat("Camera module name: %s\n", mModule->getModuleName());
2028        result.appendFormat("Camera module author: %s\n", mModule->getModuleAuthor());
2029        result.appendFormat("Number of camera devices: %d\n", mNumberOfCameras);
2030        String8 activeClientString = mActiveClientManager.toString();
2031        result.appendFormat("Active Camera Clients:\n%s", activeClientString.string());
2032
2033        sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
2034        if (desc == NULL) {
2035            result.appendFormat("Vendor tags left unimplemented.\n");
2036        } else {
2037            result.appendFormat("Vendor tag definitions:\n");
2038        }
2039
2040        write(fd, result.string(), result.size());
2041
2042        if (desc != NULL) {
2043            desc->dump(fd, /*verbosity*/2, /*indentation*/4);
2044        }
2045
2046        dumpEventLog(fd);
2047
2048        bool stateLocked = tryLock(mCameraStatesLock);
2049        if (!stateLocked) {
2050            result = String8::format("CameraStates in use, may be deadlocked\n");
2051            write(fd, result.string(), result.size());
2052        }
2053
2054        for (auto& state : mCameraStates) {
2055            String8 cameraId = state.first;
2056            result = String8::format("Camera %s information:\n", cameraId.string());
2057            camera_info info;
2058
2059            // TODO: Change getCameraInfo + HAL to use String cameraIds
2060            status_t rc = mModule->getCameraInfo(cameraIdToInt(cameraId), &info);
2061            if (rc != OK) {
2062                result.appendFormat("  Error reading static information!\n");
2063                write(fd, result.string(), result.size());
2064            } else {
2065                result.appendFormat("  Facing: %s\n",
2066                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
2067                result.appendFormat("  Orientation: %d\n", info.orientation);
2068                int deviceVersion;
2069                if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0) {
2070                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
2071                } else {
2072                    deviceVersion = info.device_version;
2073                }
2074
2075                auto conflicting = state.second->getConflicting();
2076                result.appendFormat("  Resource Cost: %d\n", state.second->getCost());
2077                result.appendFormat("  Conflicting Devices:");
2078                for (auto& id : conflicting) {
2079                    result.appendFormat(" %s", cameraId.string());
2080                }
2081                if (conflicting.size() == 0) {
2082                    result.appendFormat(" NONE");
2083                }
2084                result.appendFormat("\n");
2085
2086                result.appendFormat("  Device version: %#x\n", deviceVersion);
2087                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
2088                    result.appendFormat("  Device static metadata:\n");
2089                    write(fd, result.string(), result.size());
2090                    dump_indented_camera_metadata(info.static_camera_characteristics,
2091                            fd, /*verbosity*/2, /*indentation*/4);
2092                } else {
2093                    write(fd, result.string(), result.size());
2094                }
2095
2096                CameraParameters p = state.second->getShimParams();
2097                if (!p.isEmpty()) {
2098                    result = String8::format("  Camera1 API shim is using parameters:\n        ");
2099                    write(fd, result.string(), result.size());
2100                    p.dump(fd, args);
2101                }
2102            }
2103
2104            auto clientDescriptor = mActiveClientManager.get(cameraId);
2105            if (clientDescriptor == nullptr) {
2106                result = String8::format("  Device %s is closed, no client instance\n",
2107                        cameraId.string());
2108                write(fd, result.string(), result.size());
2109                continue;
2110            }
2111            hasClient = true;
2112            result = String8::format("  Device %s is open. Client instance dump:\n\n",
2113                    cameraId.string());
2114            result.appendFormat("Client priority level: %d\n", clientDescriptor->getPriority());
2115            result.appendFormat("Client PID: %d\n", clientDescriptor->getOwnerId());
2116
2117            auto client = clientDescriptor->getValue();
2118            result.appendFormat("Client package: %s\n",
2119                    String8(client->getPackageName()).string());
2120            write(fd, result.string(), result.size());
2121
2122            client->dump(fd, args);
2123        }
2124
2125        if (stateLocked) mCameraStatesLock.unlock();
2126
2127        if (!hasClient) {
2128            result = String8::format("\nNo active camera clients yet.\n");
2129            write(fd, result.string(), result.size());
2130        }
2131
2132        if (locked) mServiceLock.unlock();
2133
2134        // Dump camera traces if there were any
2135        write(fd, "\n", 1);
2136        camera3::CameraTraces::dump(fd, args);
2137
2138        // change logging level
2139        int n = args.size();
2140        for (int i = 0; i + 1 < n; i++) {
2141            String16 verboseOption("-v");
2142            if (args[i] == verboseOption) {
2143                String8 levelStr(args[i+1]);
2144                int level = atoi(levelStr.string());
2145                result = String8::format("\nSetting log level to %d.\n", level);
2146                setLogLevel(level);
2147                write(fd, result.string(), result.size());
2148            }
2149        }
2150    }
2151    return NO_ERROR;
2152}
2153
2154void CameraService::dumpEventLog(int fd) {
2155    String8 result = String8("\nPrior client events (most recent at top):\n");
2156
2157    Mutex::Autolock l(mLogLock);
2158    for (const auto& msg : mEventLog) {
2159        result.appendFormat("  %s\n", msg.string());
2160    }
2161
2162    if (mEventLog.size() == DEFAULT_EVENT_LOG_LENGTH) {
2163        result.append("  ...\n");
2164    } else if (mEventLog.size() == 0) {
2165        result.append("  [no events yet]\n");
2166    }
2167    result.append("\n");
2168
2169    write(fd, result.string(), result.size());
2170}
2171
2172void CameraService::handleTorchClientBinderDied(const wp<IBinder> &who) {
2173    Mutex::Autolock al(mTorchClientMapMutex);
2174    for (size_t i = 0; i < mTorchClientMap.size(); i++) {
2175        if (mTorchClientMap[i] == who) {
2176            // turn off the torch mode that was turned on by dead client
2177            String8 cameraId = mTorchClientMap.keyAt(i);
2178            status_t res = mFlashlight->setTorchMode(cameraId, false);
2179            if (res) {
2180                ALOGE("%s: torch client died but couldn't turn off torch: "
2181                    "%s (%d)", __FUNCTION__, strerror(-res), res);
2182                return;
2183            }
2184            mTorchClientMap.removeItemsAt(i);
2185            break;
2186        }
2187    }
2188}
2189
2190/*virtual*/void CameraService::binderDied(const wp<IBinder> &who) {
2191
2192    /**
2193      * While tempting to promote the wp<IBinder> into a sp, it's actually not supported by the
2194      * binder driver
2195      */
2196
2197    logClientDied(getCallingPid(), String8("Binder died unexpectedly"));
2198
2199    // check torch client
2200    handleTorchClientBinderDied(who);
2201
2202    // check camera device client
2203    if(!evictClientIdByRemote(who)) {
2204        ALOGV("%s: Java client's binder death already cleaned up (normal case)", __FUNCTION__);
2205        return;
2206    }
2207
2208    ALOGE("%s: Java client's binder died, removing it from the list of active clients",
2209            __FUNCTION__);
2210}
2211
2212void CameraService::updateStatus(ICameraServiceListener::Status status, const String8& cameraId) {
2213    updateStatus(status, cameraId, {});
2214}
2215
2216void CameraService::updateStatus(ICameraServiceListener::Status status, const String8& cameraId,
2217        std::initializer_list<ICameraServiceListener::Status> rejectSourceStates) {
2218    // Do not lock mServiceLock here or can get into a deadlock from
2219    // connect() -> disconnect -> updateStatus
2220
2221    auto state = getCameraState(cameraId);
2222
2223    if (state == nullptr) {
2224        ALOGW("%s: Could not update the status for %s, no such device exists", __FUNCTION__,
2225                cameraId.string());
2226        return;
2227    }
2228
2229    // Update the status for this camera state, then send the onStatusChangedCallbacks to each
2230    // of the listeners with both the mStatusStatus and mStatusListenerLock held
2231    state->updateStatus(status, cameraId, rejectSourceStates, [this]
2232            (const String8& cameraId, ICameraServiceListener::Status status) {
2233
2234            if (status != ICameraServiceListener::STATUS_ENUMERATING) {
2235                // Update torch status if it has a flash unit.
2236                Mutex::Autolock al(mTorchStatusMutex);
2237                ICameraServiceListener::TorchStatus torchStatus;
2238                if (getTorchStatusLocked(cameraId, &torchStatus) !=
2239                        NAME_NOT_FOUND) {
2240                    ICameraServiceListener::TorchStatus newTorchStatus =
2241                            status == ICameraServiceListener::STATUS_PRESENT ?
2242                            ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF :
2243                            ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE;
2244                    if (torchStatus != newTorchStatus) {
2245                        onTorchStatusChangedLocked(cameraId, newTorchStatus);
2246                    }
2247                }
2248            }
2249
2250            Mutex::Autolock lock(mStatusListenerLock);
2251
2252            for (auto& listener : mListenerList) {
2253                // TODO: Refactor status listeners to use strings for Camera IDs and remove this.
2254                int id = cameraIdToInt(cameraId);
2255                if (id != -1) listener->onStatusChanged(status, id);
2256            }
2257        });
2258}
2259
2260status_t CameraService::getTorchStatusLocked(
2261        const String8& cameraId,
2262        ICameraServiceListener::TorchStatus *status) const {
2263    if (!status) {
2264        return BAD_VALUE;
2265    }
2266    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2267    if (index == NAME_NOT_FOUND) {
2268        // invalid camera ID or the camera doesn't have a flash unit
2269        return NAME_NOT_FOUND;
2270    }
2271
2272    *status = mTorchStatusMap.valueAt(index);
2273    return OK;
2274}
2275
2276status_t CameraService::setTorchStatusLocked(const String8& cameraId,
2277        ICameraServiceListener::TorchStatus status) {
2278    ssize_t index = mTorchStatusMap.indexOfKey(cameraId);
2279    if (index == NAME_NOT_FOUND) {
2280        return BAD_VALUE;
2281    }
2282    ICameraServiceListener::TorchStatus& item =
2283            mTorchStatusMap.editValueAt(index);
2284    item = status;
2285
2286    return OK;
2287}
2288
2289}; // namespace android
2290