CameraService.cpp revision 8131a26957de26f15c6b41a64eb299ff61888e88
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "CameraService" 18#define ATRACE_TAG ATRACE_TAG_CAMERA 19//#define LOG_NDEBUG 0 20 21#include <algorithm> 22#include <climits> 23#include <stdio.h> 24#include <cstring> 25#include <ctime> 26#include <string> 27#include <sys/types.h> 28#include <inttypes.h> 29#include <pthread.h> 30 31#include <android/hardware/ICamera.h> 32#include <android/hardware/ICameraClient.h> 33 34#include <android-base/macros.h> 35#include <android-base/parseint.h> 36#include <binder/AppOpsManager.h> 37#include <binder/IPCThreadState.h> 38#include <binder/IServiceManager.h> 39#include <binder/MemoryBase.h> 40#include <binder/MemoryHeapBase.h> 41#include <binder/ProcessInfoService.h> 42#include <cutils/atomic.h> 43#include <cutils/properties.h> 44#include <gui/Surface.h> 45#include <hardware/hardware.h> 46#include <memunreachable/memunreachable.h> 47#include <media/AudioSystem.h> 48#include <media/IMediaHTTPService.h> 49#include <media/mediaplayer.h> 50#include <mediautils/BatteryNotifier.h> 51#include <utils/Errors.h> 52#include <utils/Log.h> 53#include <utils/String16.h> 54#include <utils/Trace.h> 55#include <private/android_filesystem_config.h> 56#include <system/camera_vendor_tags.h> 57#include <system/camera_metadata.h> 58 59#include <system/camera.h> 60 61#include <android/hidl/manager/1.0/IServiceManager.h> 62#include <hidl/ServiceManagement.h> 63 64#include "CameraService.h" 65#include "api1/CameraClient.h" 66#include "api1/Camera2Client.h" 67#include "api2/CameraDeviceClient.h" 68#include "utils/CameraTraces.h" 69 70namespace { 71 const char* kPermissionServiceName = "permission"; 72}; // namespace anonymous 73 74namespace android { 75 76using binder::Status; 77using hardware::ICamera; 78using hardware::ICameraClient; 79using hardware::ICameraServiceListener; 80using hardware::camera::common::V1_0::CameraDeviceStatus; 81using hardware::camera::common::V1_0::TorchModeStatus; 82 83// ---------------------------------------------------------------------------- 84// Logging support -- this is for debugging only 85// Use "adb shell dumpsys media.camera -v 1" to change it. 86volatile int32_t gLogLevel = 0; 87 88#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__); 89#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__); 90 91static void setLogLevel(int level) { 92 android_atomic_write(level, &gLogLevel); 93} 94 95// Convenience methods for constructing binder::Status objects for error returns 96 97#define STATUS_ERROR(errorCode, errorString) \ 98 binder::Status::fromServiceSpecificError(errorCode, \ 99 String8::format("%s:%d: %s", __FUNCTION__, __LINE__, errorString)) 100 101#define STATUS_ERROR_FMT(errorCode, errorString, ...) \ 102 binder::Status::fromServiceSpecificError(errorCode, \ 103 String8::format("%s:%d: " errorString, __FUNCTION__, __LINE__, \ 104 __VA_ARGS__)) 105 106// ---------------------------------------------------------------------------- 107 108extern "C" { 109static void camera_device_status_change( 110 const struct camera_module_callbacks* callbacks, 111 int camera_id, 112 int new_status) { 113 sp<CameraService> cs = const_cast<CameraService*>( 114 static_cast<const CameraService*>(callbacks)); 115 String8 id = String8::format("%d", camera_id); 116 117 CameraDeviceStatus newStatus{CameraDeviceStatus::NOT_PRESENT}; 118 switch (new_status) { 119 case CAMERA_DEVICE_STATUS_NOT_PRESENT: 120 newStatus = CameraDeviceStatus::NOT_PRESENT; 121 break; 122 case CAMERA_DEVICE_STATUS_PRESENT: 123 newStatus = CameraDeviceStatus::PRESENT; 124 break; 125 case CAMERA_DEVICE_STATUS_ENUMERATING: 126 newStatus = CameraDeviceStatus::ENUMERATING; 127 break; 128 default: 129 ALOGW("Unknown device status change to %d", new_status); 130 break; 131 } 132 cs->onDeviceStatusChanged(id, newStatus); 133} 134 135static void torch_mode_status_change( 136 const struct camera_module_callbacks* callbacks, 137 const char* camera_id, 138 int new_status) { 139 if (!callbacks || !camera_id) { 140 ALOGE("%s invalid parameters. callbacks %p, camera_id %p", __FUNCTION__, 141 callbacks, camera_id); 142 } 143 sp<CameraService> cs = const_cast<CameraService*>( 144 static_cast<const CameraService*>(callbacks)); 145 146 TorchModeStatus status; 147 switch (new_status) { 148 case TORCH_MODE_STATUS_NOT_AVAILABLE: 149 status = TorchModeStatus::NOT_AVAILABLE; 150 break; 151 case TORCH_MODE_STATUS_AVAILABLE_OFF: 152 status = TorchModeStatus::AVAILABLE_OFF; 153 break; 154 case TORCH_MODE_STATUS_AVAILABLE_ON: 155 status = TorchModeStatus::AVAILABLE_ON; 156 break; 157 default: 158 ALOGE("Unknown torch status %d", new_status); 159 return; 160 } 161 162 cs->onTorchStatusChanged( 163 String8(camera_id), 164 status); 165} 166} // extern "C" 167 168// ---------------------------------------------------------------------------- 169 170CameraService::CameraService() : 171 mEventLog(DEFAULT_EVENT_LOG_LENGTH), 172 mNumberOfCameras(0), mNumberOfNormalCameras(0), 173 mSoundRef(0), mInitialized(false), mModule(nullptr) { 174 ALOGI("CameraService started (pid=%d)", getpid()); 175 176 this->camera_device_status_change = android::camera_device_status_change; 177 this->torch_mode_status_change = android::torch_mode_status_change; 178 179 mServiceLockWrapper = std::make_shared<WaitableMutexWrapper>(&mServiceLock); 180} 181 182void CameraService::onFirstRef() 183{ 184 ALOGI("CameraService process starting"); 185 186 BnCameraService::onFirstRef(); 187 188 // Update battery life tracking if service is restarting 189 BatteryNotifier& notifier(BatteryNotifier::getInstance()); 190 notifier.noteResetCamera(); 191 notifier.noteResetFlashlight(); 192 193 status_t res = INVALID_OPERATION; 194 195 bool disableTreble = property_get_bool("camera.disable_treble", false); 196 if (disableTreble) { 197 ALOGI("Treble disabled - using legacy path"); 198 res = loadLegacyHalModule(); 199 } else { 200 res = enumerateProviders(); 201 } 202 if (res == OK) { 203 mInitialized = true; 204 } 205 206 CameraService::pingCameraServiceProxy(); 207} 208 209status_t CameraService::loadLegacyHalModule() { 210 camera_module_t *rawModule; 211 int err = hw_get_module(CAMERA_HARDWARE_MODULE_ID, 212 (const hw_module_t **)&rawModule); 213 if (err < 0) { 214 ALOGE("Could not load camera HAL module: %d (%s)", err, strerror(-err)); 215 logServiceError("Could not load camera HAL module", err); 216 return INVALID_OPERATION; 217 } 218 219 mModule = new CameraModule(rawModule); 220 err = mModule->init(); 221 if (err != OK) { 222 ALOGE("Could not initialize camera HAL module: %d (%s)", err, 223 strerror(-err)); 224 logServiceError("Could not initialize camera HAL module", err); 225 226 delete mModule; 227 mModule = nullptr; 228 return INVALID_OPERATION; 229 } 230 ALOGI("Loaded \"%s\" camera module", mModule->getModuleName()); 231 232 mNumberOfCameras = mModule->getNumberOfCameras(); 233 mNumberOfNormalCameras = mNumberOfCameras; 234 235 // Setup vendor tags before we call get_camera_info the first time 236 // because HAL might need to setup static vendor keys in get_camera_info 237 VendorTagDescriptor::clearGlobalVendorTagDescriptor(); 238 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_2) { 239 setUpVendorTags(); 240 } 241 242 mFlashlight = new CameraFlashlight(mModule, this); 243 status_t res = mFlashlight->findFlashUnits(); 244 if (res) { 245 // impossible because we haven't open any camera devices. 246 ALOGE("Failed to find flash units."); 247 } 248 249 int latestStrangeCameraId = INT_MAX; 250 for (int i = 0; i < mNumberOfCameras; i++) { 251 String8 cameraId = String8::format("%d", i); 252 253 // Get camera info 254 255 struct camera_info info; 256 bool haveInfo = true; 257 status_t rc = mModule->getCameraInfo(i, &info); 258 if (rc != NO_ERROR) { 259 ALOGE("%s: Received error loading camera info for device %d, cost and" 260 " conflicting devices fields set to defaults for this device.", 261 __FUNCTION__, i); 262 haveInfo = false; 263 } 264 265 // Check for backwards-compatibility support 266 if (haveInfo) { 267 if (checkCameraCapabilities(i, info, &latestStrangeCameraId) != OK) { 268 delete mModule; 269 mModule = nullptr; 270 return INVALID_OPERATION; 271 } 272 } 273 274 // Defaults to use for cost and conflicting devices 275 int cost = 100; 276 char** conflicting_devices = nullptr; 277 size_t conflicting_devices_length = 0; 278 279 // If using post-2.4 module version, query the cost + conflicting devices from the HAL 280 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_4 && haveInfo) { 281 cost = info.resource_cost; 282 conflicting_devices = info.conflicting_devices; 283 conflicting_devices_length = info.conflicting_devices_length; 284 } 285 286 std::set<String8> conflicting; 287 for (size_t i = 0; i < conflicting_devices_length; i++) { 288 conflicting.emplace(String8(conflicting_devices[i])); 289 } 290 291 // Initialize state for each camera device 292 { 293 Mutex::Autolock lock(mCameraStatesLock); 294 mCameraStates.emplace(cameraId, std::make_shared<CameraState>(cameraId, cost, 295 conflicting)); 296 } 297 298 if (mFlashlight->hasFlashUnit(cameraId)) { 299 mTorchStatusMap.add(cameraId, 300 TorchModeStatus::AVAILABLE_OFF); 301 } 302 } 303 304 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_1) { 305 mModule->setCallbacks(this); 306 } 307 308 return OK; 309} 310 311status_t CameraService::enumerateProviders() { 312 mCameraProviderManager = new CameraProviderManager(); 313 status_t res; 314 res = mCameraProviderManager->initialize(this); 315 if (res != OK) { 316 ALOGE("%s: Unable to initialize camera provider manager: %s (%d)", 317 __FUNCTION__, strerror(-res), res); 318 return res; 319 } 320 321 mNumberOfCameras = mCameraProviderManager->getCameraCount(); 322 mNumberOfNormalCameras = mCameraProviderManager->getStandardCameraCount(); 323 324 // Setup vendor tags before we call get_camera_info the first time 325 // because HAL might need to setup static vendor keys in get_camera_info 326 // TODO: maybe put this into CameraProviderManager::initialize()? 327 mCameraProviderManager->setUpVendorTags(); 328 329 mFlashlight = new CameraFlashlight(mCameraProviderManager, this); 330 res = mFlashlight->findFlashUnits(); 331 if (res != OK) { 332 ALOGE("Failed to enumerate flash units: %s (%d)", strerror(-res), res); 333 } 334 335 // TODO: Verify device versions are in support 336 337 for (auto& cameraId : mCameraProviderManager->getCameraDeviceIds()) { 338 hardware::camera::common::V1_0::CameraResourceCost cost; 339 res = mCameraProviderManager->getResourceCost(cameraId, &cost); 340 if (res != OK) { 341 ALOGE("Failed to query device resource cost: %s (%d)", strerror(-res), res); 342 continue; 343 } 344 std::set<String8> conflicting; 345 for (size_t i = 0; i < cost.conflictingDevices.size(); i++) { 346 conflicting.emplace(String8(cost.conflictingDevices[i].c_str())); 347 } 348 String8 id8 = String8(cameraId.c_str()); 349 350 Mutex::Autolock lock(mCameraStatesLock); 351 mCameraStates.emplace(id8, 352 std::make_shared<CameraState>(id8, cost.resourceCost, conflicting)); 353 354 if (mFlashlight->hasFlashUnit(id8)) { 355 mTorchStatusMap.add(id8, 356 TorchModeStatus::AVAILABLE_OFF); 357 } 358 } 359 360 return OK; 361} 362 363 364sp<ICameraServiceProxy> CameraService::getCameraServiceProxy() { 365 sp<ICameraServiceProxy> proxyBinder = nullptr; 366#ifndef __BRILLO__ 367 sp<IServiceManager> sm = defaultServiceManager(); 368 // Use checkService because cameraserver normally starts before the 369 // system server and the proxy service. So the long timeout that getService 370 // has before giving up is inappropriate. 371 sp<IBinder> binder = sm->checkService(String16("media.camera.proxy")); 372 if (binder != nullptr) { 373 proxyBinder = interface_cast<ICameraServiceProxy>(binder); 374 } 375#endif 376 return proxyBinder; 377} 378 379void CameraService::pingCameraServiceProxy() { 380 sp<ICameraServiceProxy> proxyBinder = getCameraServiceProxy(); 381 if (proxyBinder == nullptr) return; 382 proxyBinder->pingForUserUpdate(); 383} 384 385CameraService::~CameraService() { 386 if (mModule) { 387 delete mModule; 388 mModule = nullptr; 389 } 390 VendorTagDescriptor::clearGlobalVendorTagDescriptor(); 391} 392 393void CameraService::onDeviceStatusChanged(const String8& id, 394 CameraDeviceStatus newHalStatus) { 395 ALOGI("%s: Status changed for cameraId=%s, newStatus=%d", __FUNCTION__, 396 id.string(), newHalStatus); 397 398 StatusInternal newStatus = mapToInternal(newHalStatus); 399 400 std::shared_ptr<CameraState> state = getCameraState(id); 401 402 if (state == nullptr) { 403 ALOGE("%s: Bad camera ID %s", __FUNCTION__, id.string()); 404 return; 405 } 406 407 StatusInternal oldStatus = state->getStatus(); 408 409 if (oldStatus == newStatus) { 410 ALOGE("%s: State transition to the same status %#x not allowed", __FUNCTION__, newStatus); 411 return; 412 } 413 414 if (newStatus == StatusInternal::NOT_PRESENT) { 415 logDeviceRemoved(id, String8::format("Device status changed from %d to %d", oldStatus, 416 newStatus)); 417 sp<BasicClient> clientToDisconnect; 418 { 419 // Don't do this in updateStatus to avoid deadlock over mServiceLock 420 Mutex::Autolock lock(mServiceLock); 421 422 // Set the device status to NOT_PRESENT, clients will no longer be able to connect 423 // to this device until the status changes 424 updateStatus(StatusInternal::NOT_PRESENT, id); 425 426 // Remove cached shim parameters 427 state->setShimParams(CameraParameters()); 428 429 // Remove the client from the list of active clients 430 clientToDisconnect = removeClientLocked(id); 431 432 // Notify the client of disconnection 433 clientToDisconnect->notifyError( 434 hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED, 435 CaptureResultExtras{}); 436 } 437 438 ALOGI("%s: Client for camera ID %s evicted due to device status change from HAL", 439 __FUNCTION__, id.string()); 440 441 // Disconnect client 442 if (clientToDisconnect.get() != nullptr) { 443 // Ensure not in binder RPC so client disconnect PID checks work correctly 444 LOG_ALWAYS_FATAL_IF(getCallingPid() != getpid(), 445 "onDeviceStatusChanged must be called from the camera service process!"); 446 clientToDisconnect->disconnect(); 447 } 448 449 } else { 450 if (oldStatus == StatusInternal::NOT_PRESENT) { 451 logDeviceAdded(id, String8::format("Device status changed from %d to %d", oldStatus, 452 newStatus)); 453 } 454 updateStatus(newStatus, id); 455 } 456 457} 458 459void CameraService::onTorchStatusChanged(const String8& cameraId, 460 TorchModeStatus newStatus) { 461 Mutex::Autolock al(mTorchStatusMutex); 462 onTorchStatusChangedLocked(cameraId, newStatus); 463} 464 465void CameraService::onTorchStatusChangedLocked(const String8& cameraId, 466 TorchModeStatus newStatus) { 467 ALOGI("%s: Torch status changed for cameraId=%s, newStatus=%d", 468 __FUNCTION__, cameraId.string(), newStatus); 469 470 TorchModeStatus status; 471 status_t res = getTorchStatusLocked(cameraId, &status); 472 if (res) { 473 ALOGE("%s: cannot get torch status of camera %s: %s (%d)", 474 __FUNCTION__, cameraId.string(), strerror(-res), res); 475 return; 476 } 477 if (status == newStatus) { 478 return; 479 } 480 481 res = setTorchStatusLocked(cameraId, newStatus); 482 if (res) { 483 ALOGE("%s: Failed to set the torch status to %d: %s (%d)", __FUNCTION__, 484 (uint32_t)newStatus, strerror(-res), res); 485 return; 486 } 487 488 { 489 // Update battery life logging for flashlight 490 Mutex::Autolock al(mTorchUidMapMutex); 491 auto iter = mTorchUidMap.find(cameraId); 492 if (iter != mTorchUidMap.end()) { 493 int oldUid = iter->second.second; 494 int newUid = iter->second.first; 495 BatteryNotifier& notifier(BatteryNotifier::getInstance()); 496 if (oldUid != newUid) { 497 // If the UID has changed, log the status and update current UID in mTorchUidMap 498 if (status == TorchModeStatus::AVAILABLE_ON) { 499 notifier.noteFlashlightOff(cameraId, oldUid); 500 } 501 if (newStatus == TorchModeStatus::AVAILABLE_ON) { 502 notifier.noteFlashlightOn(cameraId, newUid); 503 } 504 iter->second.second = newUid; 505 } else { 506 // If the UID has not changed, log the status 507 if (newStatus == TorchModeStatus::AVAILABLE_ON) { 508 notifier.noteFlashlightOn(cameraId, oldUid); 509 } else { 510 notifier.noteFlashlightOff(cameraId, oldUid); 511 } 512 } 513 } 514 } 515 516 { 517 Mutex::Autolock lock(mStatusListenerLock); 518 for (auto& i : mListenerList) { 519 i->onTorchStatusChanged(mapToInterface(newStatus), String16{cameraId}); 520 } 521 } 522} 523 524Status CameraService::getNumberOfCameras(int32_t type, int32_t* numCameras) { 525 ATRACE_CALL(); 526 switch (type) { 527 case CAMERA_TYPE_BACKWARD_COMPATIBLE: 528 *numCameras = mNumberOfNormalCameras; 529 break; 530 case CAMERA_TYPE_ALL: 531 *numCameras = mNumberOfCameras; 532 break; 533 default: 534 ALOGW("%s: Unknown camera type %d", 535 __FUNCTION__, type); 536 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 537 "Unknown camera type %d", type); 538 } 539 return Status::ok(); 540} 541 542Status CameraService::getCameraInfo(int cameraId, 543 CameraInfo* cameraInfo) { 544 ATRACE_CALL(); 545 if (!mInitialized) { 546 return STATUS_ERROR(ERROR_DISCONNECTED, 547 "Camera subsystem is not available"); 548 } 549 550 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 551 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, 552 "CameraId is not valid"); 553 } 554 555 Status ret = Status::ok(); 556 if (mModule != nullptr) { 557 struct camera_info info; 558 ret = filterGetInfoErrorCode(mModule->getCameraInfo(cameraId, &info)); 559 560 if (ret.isOk()) { 561 cameraInfo->facing = info.facing; 562 cameraInfo->orientation = info.orientation; 563 // CameraInfo is for android.hardware.Camera which does not 564 // support external camera facing. The closest approximation would be 565 // front camera. 566 if (cameraInfo->facing == CAMERA_FACING_EXTERNAL) { 567 cameraInfo->facing = hardware::CAMERA_FACING_FRONT; 568 } 569 } 570 } else { 571 status_t err = mCameraProviderManager->getCameraInfo(std::to_string(cameraId), cameraInfo); 572 if (err != OK) { 573 ret = STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 574 "Error retrieving camera info from device %d: %s (%d)", cameraId, 575 strerror(-err), err); 576 } 577 } 578 return ret; 579} 580 581int CameraService::cameraIdToInt(const String8& cameraId) { 582 int id; 583 bool success = base::ParseInt(cameraId.string(), &id, 0); 584 if (!success) { 585 return -1; 586 } 587 return id; 588} 589 590Status CameraService::getCameraCharacteristics(const String16& cameraId, 591 CameraMetadata* cameraInfo) { 592 ATRACE_CALL(); 593 if (!cameraInfo) { 594 ALOGE("%s: cameraInfo is NULL", __FUNCTION__); 595 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "cameraInfo is NULL"); 596 } 597 598 if (!mInitialized) { 599 ALOGE("%s: Camera HAL couldn't be initialized", __FUNCTION__); 600 return STATUS_ERROR(ERROR_DISCONNECTED, 601 "Camera subsystem is not available");; 602 } 603 604 Status ret{}; 605 606 if (mModule != nullptr) { 607 int id = cameraIdToInt(String8(cameraId)); 608 609 if (id < 0 || id >= mNumberOfCameras) { 610 ALOGE("%s: Invalid camera id: %d", __FUNCTION__, id); 611 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 612 "Invalid camera id: %d", id); 613 } 614 615 int version = getDeviceVersion(String8(cameraId)); 616 if (version < CAMERA_DEVICE_API_VERSION_3_0) { 617 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, "Can't get camera characteristics" 618 " for devices with HAL version < 3.0, %d is version %x", id, version); 619 } 620 621 struct camera_info info; 622 ret = filterGetInfoErrorCode(mModule->getCameraInfo(id, &info)); 623 if (ret.isOk()) { 624 *cameraInfo = info.static_camera_characteristics; 625 } 626 } else { 627 status_t res = mCameraProviderManager->getCameraCharacteristics( 628 String16::std_string(cameraId), cameraInfo); 629 if (res != OK) { 630 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, "Unable to retrieve camera " 631 "characteristics for device %s: %s (%d)", String8(cameraId).string(), 632 strerror(-res), res); 633 } 634 } 635 636 return ret; 637} 638 639int CameraService::getCallingPid() { 640 return IPCThreadState::self()->getCallingPid(); 641} 642 643int CameraService::getCallingUid() { 644 return IPCThreadState::self()->getCallingUid(); 645} 646 647String8 CameraService::getFormattedCurrentTime() { 648 time_t now = time(nullptr); 649 char formattedTime[64]; 650 strftime(formattedTime, sizeof(formattedTime), "%m-%d %H:%M:%S", localtime(&now)); 651 return String8(formattedTime); 652} 653 654Status CameraService::getCameraVendorTagDescriptor( 655 /*out*/ 656 hardware::camera2::params::VendorTagDescriptor* desc) { 657 ATRACE_CALL(); 658 if (!mInitialized) { 659 ALOGE("%s: Camera HAL couldn't be initialized", __FUNCTION__); 660 return STATUS_ERROR(ERROR_DISCONNECTED, "Camera subsystem not available"); 661 } 662 sp<VendorTagDescriptor> globalDescriptor = VendorTagDescriptor::getGlobalVendorTagDescriptor(); 663 if (globalDescriptor != nullptr) { 664 *desc = *(globalDescriptor.get()); 665 } 666 return Status::ok(); 667} 668 669int CameraService::getDeviceVersion(const String8& cameraId, int* facing) { 670 ATRACE_CALL(); 671 672 int deviceVersion = 0; 673 674 if (mModule != nullptr) { 675 int id = cameraIdToInt(cameraId); 676 if (id < 0) return -1; 677 678 struct camera_info info; 679 if (mModule->getCameraInfo(id, &info) != OK) { 680 return -1; 681 } 682 683 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) { 684 deviceVersion = info.device_version; 685 } else { 686 deviceVersion = CAMERA_DEVICE_API_VERSION_1_0; 687 } 688 689 if (facing) { 690 *facing = info.facing; 691 } 692 } else { 693 status_t res; 694 hardware::hidl_version maxVersion{0,0}; 695 res = mCameraProviderManager->getHighestSupportedVersion(String8::std_string(cameraId), 696 &maxVersion); 697 if (res != OK) return -1; 698 deviceVersion = HARDWARE_DEVICE_API_VERSION(maxVersion.get_major(), maxVersion.get_minor()); 699 700 hardware::CameraInfo info; 701 if (facing) { 702 res = mCameraProviderManager->getCameraInfo(String8::std_string(cameraId), &info); 703 if (res != OK) return -1; 704 *facing = info.facing; 705 } 706 } 707 return deviceVersion; 708} 709 710Status CameraService::filterGetInfoErrorCode(status_t err) { 711 switch(err) { 712 case NO_ERROR: 713 return Status::ok(); 714 case BAD_VALUE: 715 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, 716 "CameraId is not valid for HAL module"); 717 case NO_INIT: 718 return STATUS_ERROR(ERROR_DISCONNECTED, 719 "Camera device not available"); 720 default: 721 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 722 "Camera HAL encountered error %d: %s", 723 err, strerror(-err)); 724 } 725} 726 727bool CameraService::setUpVendorTags() { 728 ATRACE_CALL(); 729 if (mModule == nullptr) return false; 730 731 vendor_tag_ops_t vOps = vendor_tag_ops_t(); 732 733 // Check if vendor operations have been implemented 734 if (!mModule->isVendorTagDefined()) { 735 ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__); 736 return false; 737 } 738 739 mModule->getVendorTagOps(&vOps); 740 741 // Ensure all vendor operations are present 742 if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL || 743 vOps.get_section_name == NULL || vOps.get_tag_name == NULL || 744 vOps.get_tag_type == NULL) { 745 ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions." 746 , __FUNCTION__); 747 return false; 748 } 749 750 // Read all vendor tag definitions into a descriptor 751 sp<VendorTagDescriptor> desc; 752 status_t res; 753 if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc)) 754 != OK) { 755 ALOGE("%s: Could not generate descriptor from vendor tag operations," 756 "received error %s (%d). Camera clients will not be able to use" 757 "vendor tags", __FUNCTION__, strerror(res), res); 758 return false; 759 } 760 761 // Set the global descriptor to use with camera metadata 762 VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc); 763 return true; 764} 765 766Status CameraService::makeClient(const sp<CameraService>& cameraService, 767 const sp<IInterface>& cameraCb, const String16& packageName, const String8& cameraId, 768 int facing, int clientPid, uid_t clientUid, int servicePid, bool legacyMode, 769 int halVersion, int deviceVersion, apiLevel effectiveApiLevel, 770 /*out*/sp<BasicClient>* client) { 771 772 if (halVersion < 0 || halVersion == deviceVersion) { 773 // Default path: HAL version is unspecified by caller, create CameraClient 774 // based on device version reported by the HAL. 775 switch(deviceVersion) { 776 case CAMERA_DEVICE_API_VERSION_1_0: 777 if (effectiveApiLevel == API_1) { // Camera1 API route 778 sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get()); 779 *client = new CameraClient(cameraService, tmp, packageName, cameraIdToInt(cameraId), 780 facing, clientPid, clientUid, getpid(), legacyMode); 781 } else { // Camera2 API route 782 ALOGW("Camera using old HAL version: %d", deviceVersion); 783 return STATUS_ERROR_FMT(ERROR_DEPRECATED_HAL, 784 "Camera device \"%s\" HAL version %d does not support camera2 API", 785 cameraId.string(), deviceVersion); 786 } 787 break; 788 case CAMERA_DEVICE_API_VERSION_3_0: 789 case CAMERA_DEVICE_API_VERSION_3_1: 790 case CAMERA_DEVICE_API_VERSION_3_2: 791 case CAMERA_DEVICE_API_VERSION_3_3: 792 case CAMERA_DEVICE_API_VERSION_3_4: 793 if (effectiveApiLevel == API_1) { // Camera1 API route 794 sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get()); 795 *client = new Camera2Client(cameraService, tmp, packageName, cameraIdToInt(cameraId), 796 facing, clientPid, clientUid, servicePid, legacyMode); 797 } else { // Camera2 API route 798 sp<hardware::camera2::ICameraDeviceCallbacks> tmp = 799 static_cast<hardware::camera2::ICameraDeviceCallbacks*>(cameraCb.get()); 800 *client = new CameraDeviceClient(cameraService, tmp, packageName, cameraId, 801 facing, clientPid, clientUid, servicePid); 802 } 803 break; 804 default: 805 // Should not be reachable 806 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 807 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 808 "Camera device \"%s\" has unknown HAL version %d", 809 cameraId.string(), deviceVersion); 810 } 811 } else { 812 // A particular HAL version is requested by caller. Create CameraClient 813 // based on the requested HAL version. 814 if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 && 815 halVersion == CAMERA_DEVICE_API_VERSION_1_0) { 816 // Only support higher HAL version device opened as HAL1.0 device. 817 sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get()); 818 *client = new CameraClient(cameraService, tmp, packageName, cameraIdToInt(cameraId), 819 facing, clientPid, clientUid, servicePid, legacyMode); 820 } else { 821 // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet. 822 ALOGE("Invalid camera HAL version %x: HAL %x device can only be" 823 " opened as HAL %x device", halVersion, deviceVersion, 824 CAMERA_DEVICE_API_VERSION_1_0); 825 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 826 "Camera device \"%s\" (HAL version %d) cannot be opened as HAL version %d", 827 cameraId.string(), deviceVersion, halVersion); 828 } 829 } 830 return Status::ok(); 831} 832 833String8 CameraService::toString(std::set<userid_t> intSet) { 834 String8 s(""); 835 bool first = true; 836 for (userid_t i : intSet) { 837 if (first) { 838 s.appendFormat("%d", i); 839 first = false; 840 } else { 841 s.appendFormat(", %d", i); 842 } 843 } 844 return s; 845} 846 847int32_t CameraService::mapToInterface(TorchModeStatus status) { 848 int32_t serviceStatus = ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE; 849 switch (status) { 850 case TorchModeStatus::NOT_AVAILABLE: 851 serviceStatus = ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE; 852 break; 853 case TorchModeStatus::AVAILABLE_OFF: 854 serviceStatus = ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF; 855 break; 856 case TorchModeStatus::AVAILABLE_ON: 857 serviceStatus = ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON; 858 break; 859 default: 860 ALOGW("Unknown new flash status: %d", status); 861 } 862 return serviceStatus; 863} 864 865CameraService::StatusInternal CameraService::mapToInternal(CameraDeviceStatus status) { 866 StatusInternal serviceStatus = StatusInternal::NOT_PRESENT; 867 switch (status) { 868 case CameraDeviceStatus::NOT_PRESENT: 869 serviceStatus = StatusInternal::NOT_PRESENT; 870 break; 871 case CameraDeviceStatus::PRESENT: 872 serviceStatus = StatusInternal::PRESENT; 873 break; 874 case CameraDeviceStatus::ENUMERATING: 875 serviceStatus = StatusInternal::ENUMERATING; 876 break; 877 default: 878 ALOGW("Unknown new HAL device status: %d", status); 879 } 880 return serviceStatus; 881} 882 883int32_t CameraService::mapToInterface(StatusInternal status) { 884 int32_t serviceStatus = ICameraServiceListener::STATUS_NOT_PRESENT; 885 switch (status) { 886 case StatusInternal::NOT_PRESENT: 887 serviceStatus = ICameraServiceListener::STATUS_NOT_PRESENT; 888 break; 889 case StatusInternal::PRESENT: 890 serviceStatus = ICameraServiceListener::STATUS_PRESENT; 891 break; 892 case StatusInternal::ENUMERATING: 893 serviceStatus = ICameraServiceListener::STATUS_ENUMERATING; 894 break; 895 case StatusInternal::NOT_AVAILABLE: 896 serviceStatus = ICameraServiceListener::STATUS_NOT_AVAILABLE; 897 break; 898 case StatusInternal::UNKNOWN: 899 serviceStatus = ICameraServiceListener::STATUS_UNKNOWN; 900 break; 901 default: 902 ALOGW("Unknown new internal device status: %d", status); 903 } 904 return serviceStatus; 905} 906 907Status CameraService::initializeShimMetadata(int cameraId) { 908 int uid = getCallingUid(); 909 910 String16 internalPackageName("cameraserver"); 911 String8 id = String8::format("%d", cameraId); 912 Status ret = Status::ok(); 913 sp<Client> tmp = nullptr; 914 if (!(ret = connectHelper<ICameraClient,Client>( 915 sp<ICameraClient>{nullptr}, id, static_cast<int>(CAMERA_HAL_API_VERSION_UNSPECIFIED), 916 internalPackageName, uid, USE_CALLING_PID, 917 API_1, /*legacyMode*/ false, /*shimUpdateOnly*/ true, 918 /*out*/ tmp) 919 ).isOk()) { 920 ALOGE("%s: Error initializing shim metadata: %s", __FUNCTION__, ret.toString8().string()); 921 } 922 return ret; 923} 924 925Status CameraService::getLegacyParametersLazy(int cameraId, 926 /*out*/ 927 CameraParameters* parameters) { 928 929 ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId); 930 931 Status ret = Status::ok(); 932 933 if (parameters == NULL) { 934 ALOGE("%s: parameters must not be null", __FUNCTION__); 935 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Parameters must not be null"); 936 } 937 938 String8 id = String8::format("%d", cameraId); 939 940 // Check if we already have parameters 941 { 942 // Scope for service lock 943 Mutex::Autolock lock(mServiceLock); 944 auto cameraState = getCameraState(id); 945 if (cameraState == nullptr) { 946 ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string()); 947 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 948 "Invalid camera ID: %s", id.string()); 949 } 950 CameraParameters p = cameraState->getShimParams(); 951 if (!p.isEmpty()) { 952 *parameters = p; 953 return ret; 954 } 955 } 956 957 int64_t token = IPCThreadState::self()->clearCallingIdentity(); 958 ret = initializeShimMetadata(cameraId); 959 IPCThreadState::self()->restoreCallingIdentity(token); 960 if (!ret.isOk()) { 961 // Error already logged by callee 962 return ret; 963 } 964 965 // Check for parameters again 966 { 967 // Scope for service lock 968 Mutex::Autolock lock(mServiceLock); 969 auto cameraState = getCameraState(id); 970 if (cameraState == nullptr) { 971 ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string()); 972 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 973 "Invalid camera ID: %s", id.string()); 974 } 975 CameraParameters p = cameraState->getShimParams(); 976 if (!p.isEmpty()) { 977 *parameters = p; 978 return ret; 979 } 980 } 981 982 ALOGE("%s: Parameters were not initialized, or were empty. Device may not be present.", 983 __FUNCTION__); 984 return STATUS_ERROR(ERROR_INVALID_OPERATION, "Unable to initialize legacy parameters"); 985} 986 987// Can camera service trust the caller based on the calling UID? 988static bool isTrustedCallingUid(uid_t uid) { 989 switch (uid) { 990 case AID_MEDIA: // mediaserver 991 case AID_CAMERASERVER: // cameraserver 992 case AID_RADIO: // telephony 993 return true; 994 default: 995 return false; 996 } 997} 998 999Status CameraService::validateConnectLocked(const String8& cameraId, 1000 const String8& clientName8, /*inout*/int& clientUid, /*inout*/int& clientPid, 1001 /*out*/int& originalClientPid) const { 1002 1003#ifdef __BRILLO__ 1004 UNUSED(clientName8); 1005 UNUSED(clientUid); 1006 UNUSED(clientPid); 1007 UNUSED(originalClientPid); 1008#else 1009 Status allowed = validateClientPermissionsLocked(cameraId, clientName8, clientUid, clientPid, 1010 originalClientPid); 1011 if (!allowed.isOk()) { 1012 return allowed; 1013 } 1014#endif // __BRILLO__ 1015 1016 int callingPid = getCallingPid(); 1017 1018 if (!mInitialized) { 1019 ALOGE("CameraService::connect X (PID %d) rejected (camera HAL module not loaded)", 1020 callingPid); 1021 return STATUS_ERROR_FMT(ERROR_DISCONNECTED, 1022 "No camera HAL module available to open camera device \"%s\"", cameraId.string()); 1023 } 1024 1025 if (getCameraState(cameraId) == nullptr) { 1026 ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid, 1027 cameraId.string()); 1028 return STATUS_ERROR_FMT(ERROR_DISCONNECTED, 1029 "No camera device with ID \"%s\" available", cameraId.string()); 1030 } 1031 1032 status_t err = checkIfDeviceIsUsable(cameraId); 1033 if (err != NO_ERROR) { 1034 switch(err) { 1035 case -ENODEV: 1036 case -EBUSY: 1037 return STATUS_ERROR_FMT(ERROR_DISCONNECTED, 1038 "No camera device with ID \"%s\" currently available", cameraId.string()); 1039 default: 1040 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 1041 "Unknown error connecting to ID \"%s\"", cameraId.string()); 1042 } 1043 } 1044 return Status::ok(); 1045} 1046 1047Status CameraService::validateClientPermissionsLocked(const String8& cameraId, 1048 const String8& clientName8, int& clientUid, int& clientPid, 1049 /*out*/int& originalClientPid) const { 1050 int callingPid = getCallingPid(); 1051 int callingUid = getCallingUid(); 1052 1053 // Check if we can trust clientUid 1054 if (clientUid == USE_CALLING_UID) { 1055 clientUid = callingUid; 1056 } else if (!isTrustedCallingUid(callingUid)) { 1057 ALOGE("CameraService::connect X (calling PID %d, calling UID %d) rejected " 1058 "(don't trust clientUid %d)", callingPid, callingUid, clientUid); 1059 return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, 1060 "Untrusted caller (calling PID %d, UID %d) trying to " 1061 "forward camera access to camera %s for client %s (PID %d, UID %d)", 1062 callingPid, callingUid, cameraId.string(), 1063 clientName8.string(), clientUid, clientPid); 1064 } 1065 1066 // Check if we can trust clientPid 1067 if (clientPid == USE_CALLING_PID) { 1068 clientPid = callingPid; 1069 } else if (!isTrustedCallingUid(callingUid)) { 1070 ALOGE("CameraService::connect X (calling PID %d, calling UID %d) rejected " 1071 "(don't trust clientPid %d)", callingPid, callingUid, clientPid); 1072 return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, 1073 "Untrusted caller (calling PID %d, UID %d) trying to " 1074 "forward camera access to camera %s for client %s (PID %d, UID %d)", 1075 callingPid, callingUid, cameraId.string(), 1076 clientName8.string(), clientUid, clientPid); 1077 } 1078 1079 // If it's not calling from cameraserver, check the permission. 1080 if (callingPid != getpid() && 1081 !checkPermission(String16("android.permission.CAMERA"), clientPid, clientUid)) { 1082 ALOGE("Permission Denial: can't use the camera pid=%d, uid=%d", clientPid, clientUid); 1083 return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, 1084 "Caller \"%s\" (PID %d, UID %d) cannot open camera \"%s\" without camera permission", 1085 clientName8.string(), clientUid, clientPid, cameraId.string()); 1086 } 1087 1088 // Only use passed in clientPid to check permission. Use calling PID as the client PID that's 1089 // connected to camera service directly. 1090 originalClientPid = clientPid; 1091 clientPid = callingPid; 1092 1093 userid_t clientUserId = multiuser_get_user_id(clientUid); 1094 1095 // Only allow clients who are being used by the current foreground device user, unless calling 1096 // from our own process. 1097 if (callingPid != getpid() && (mAllowedUsers.find(clientUserId) == mAllowedUsers.end())) { 1098 ALOGE("CameraService::connect X (PID %d) rejected (cannot connect from " 1099 "device user %d, currently allowed device users: %s)", callingPid, clientUserId, 1100 toString(mAllowedUsers).string()); 1101 return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, 1102 "Callers from device user %d are not currently allowed to connect to camera \"%s\"", 1103 clientUserId, cameraId.string()); 1104 } 1105 1106 return Status::ok(); 1107} 1108 1109status_t CameraService::checkIfDeviceIsUsable(const String8& cameraId) const { 1110 auto cameraState = getCameraState(cameraId); 1111 int callingPid = getCallingPid(); 1112 if (cameraState == nullptr) { 1113 ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid, 1114 cameraId.string()); 1115 return -ENODEV; 1116 } 1117 1118 StatusInternal currentStatus = cameraState->getStatus(); 1119 if (currentStatus == StatusInternal::NOT_PRESENT) { 1120 ALOGE("CameraService::connect X (PID %d) rejected (camera %s is not connected)", 1121 callingPid, cameraId.string()); 1122 return -ENODEV; 1123 } else if (currentStatus == StatusInternal::ENUMERATING) { 1124 ALOGE("CameraService::connect X (PID %d) rejected, (camera %s is initializing)", 1125 callingPid, cameraId.string()); 1126 return -EBUSY; 1127 } 1128 1129 return NO_ERROR; 1130} 1131 1132void CameraService::finishConnectLocked(const sp<BasicClient>& client, 1133 const CameraService::DescriptorPtr& desc) { 1134 1135 // Make a descriptor for the incoming client 1136 auto clientDescriptor = CameraService::CameraClientManager::makeClientDescriptor(client, desc); 1137 auto evicted = mActiveClientManager.addAndEvict(clientDescriptor); 1138 1139 logConnected(desc->getKey(), static_cast<int>(desc->getOwnerId()), 1140 String8(client->getPackageName())); 1141 1142 if (evicted.size() > 0) { 1143 // This should never happen - clients should already have been removed in disconnect 1144 for (auto& i : evicted) { 1145 ALOGE("%s: Invalid state: Client for camera %s was not removed in disconnect", 1146 __FUNCTION__, i->getKey().string()); 1147 } 1148 1149 LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, clients not evicted properly", 1150 __FUNCTION__); 1151 } 1152 1153 // And register a death notification for the client callback. Do 1154 // this last to avoid Binder policy where a nested Binder 1155 // transaction might be pre-empted to service the client death 1156 // notification if the client process dies before linkToDeath is 1157 // invoked. 1158 sp<IBinder> remoteCallback = client->getRemote(); 1159 if (remoteCallback != nullptr) { 1160 remoteCallback->linkToDeath(this); 1161 } 1162} 1163 1164status_t CameraService::handleEvictionsLocked(const String8& cameraId, int clientPid, 1165 apiLevel effectiveApiLevel, const sp<IBinder>& remoteCallback, const String8& packageName, 1166 /*out*/ 1167 sp<BasicClient>* client, 1168 std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>* partial) { 1169 ATRACE_CALL(); 1170 status_t ret = NO_ERROR; 1171 std::vector<DescriptorPtr> evictedClients; 1172 DescriptorPtr clientDescriptor; 1173 { 1174 if (effectiveApiLevel == API_1) { 1175 // If we are using API1, any existing client for this camera ID with the same remote 1176 // should be returned rather than evicted to allow MediaRecorder to work properly. 1177 1178 auto current = mActiveClientManager.get(cameraId); 1179 if (current != nullptr) { 1180 auto clientSp = current->getValue(); 1181 if (clientSp.get() != nullptr) { // should never be needed 1182 if (!clientSp->canCastToApiClient(effectiveApiLevel)) { 1183 ALOGW("CameraService connect called from same client, but with a different" 1184 " API level, evicting prior client..."); 1185 } else if (clientSp->getRemote() == remoteCallback) { 1186 ALOGI("CameraService::connect X (PID %d) (second call from same" 1187 " app binder, returning the same client)", clientPid); 1188 *client = clientSp; 1189 return NO_ERROR; 1190 } 1191 } 1192 } 1193 } 1194 1195 // Get current active client PIDs 1196 std::vector<int> ownerPids(mActiveClientManager.getAllOwners()); 1197 ownerPids.push_back(clientPid); 1198 1199 std::vector<int> priorityScores(ownerPids.size()); 1200 std::vector<int> states(ownerPids.size()); 1201 1202 // Get priority scores of all active PIDs 1203 status_t err = ProcessInfoService::getProcessStatesScoresFromPids( 1204 ownerPids.size(), &ownerPids[0], /*out*/&states[0], 1205 /*out*/&priorityScores[0]); 1206 if (err != OK) { 1207 ALOGE("%s: Priority score query failed: %d", 1208 __FUNCTION__, err); 1209 return err; 1210 } 1211 1212 // Update all active clients' priorities 1213 std::map<int,resource_policy::ClientPriority> pidToPriorityMap; 1214 for (size_t i = 0; i < ownerPids.size() - 1; i++) { 1215 pidToPriorityMap.emplace(ownerPids[i], 1216 resource_policy::ClientPriority(priorityScores[i], states[i])); 1217 } 1218 mActiveClientManager.updatePriorities(pidToPriorityMap); 1219 1220 // Get state for the given cameraId 1221 auto state = getCameraState(cameraId); 1222 if (state == nullptr) { 1223 ALOGE("CameraService::connect X (PID %d) rejected (no camera device with ID %s)", 1224 clientPid, cameraId.string()); 1225 // Should never get here because validateConnectLocked should have errored out 1226 return BAD_VALUE; 1227 } 1228 1229 // Make descriptor for incoming client 1230 clientDescriptor = CameraClientManager::makeClientDescriptor(cameraId, 1231 sp<BasicClient>{nullptr}, static_cast<int32_t>(state->getCost()), 1232 state->getConflicting(), 1233 priorityScores[priorityScores.size() - 1], 1234 clientPid, 1235 states[states.size() - 1]); 1236 1237 // Find clients that would be evicted 1238 auto evicted = mActiveClientManager.wouldEvict(clientDescriptor); 1239 1240 // If the incoming client was 'evicted,' higher priority clients have the camera in the 1241 // background, so we cannot do evictions 1242 if (std::find(evicted.begin(), evicted.end(), clientDescriptor) != evicted.end()) { 1243 ALOGE("CameraService::connect X (PID %d) rejected (existing client(s) with higher" 1244 " priority).", clientPid); 1245 1246 sp<BasicClient> clientSp = clientDescriptor->getValue(); 1247 String8 curTime = getFormattedCurrentTime(); 1248 auto incompatibleClients = 1249 mActiveClientManager.getIncompatibleClients(clientDescriptor); 1250 1251 String8 msg = String8::format("%s : DENIED connect device %s client for package %s " 1252 "(PID %d, score %d state %d) due to eviction policy", curTime.string(), 1253 cameraId.string(), packageName.string(), clientPid, 1254 priorityScores[priorityScores.size() - 1], 1255 states[states.size() - 1]); 1256 1257 for (auto& i : incompatibleClients) { 1258 msg.appendFormat("\n - Blocked by existing device %s client for package %s" 1259 "(PID %" PRId32 ", score %" PRId32 ", state %" PRId32 ")", 1260 i->getKey().string(), 1261 String8{i->getValue()->getPackageName()}.string(), 1262 i->getOwnerId(), i->getPriority().getScore(), 1263 i->getPriority().getState()); 1264 ALOGE(" Conflicts with: Device %s, client package %s (PID %" 1265 PRId32 ", score %" PRId32 ", state %" PRId32 ")", i->getKey().string(), 1266 String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(), 1267 i->getPriority().getScore(), i->getPriority().getState()); 1268 } 1269 1270 // Log the client's attempt 1271 Mutex::Autolock l(mLogLock); 1272 mEventLog.add(msg); 1273 1274 return -EBUSY; 1275 } 1276 1277 for (auto& i : evicted) { 1278 sp<BasicClient> clientSp = i->getValue(); 1279 if (clientSp.get() == nullptr) { 1280 ALOGE("%s: Invalid state: Null client in active client list.", __FUNCTION__); 1281 1282 // TODO: Remove this 1283 LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, null client in active list", 1284 __FUNCTION__); 1285 mActiveClientManager.remove(i); 1286 continue; 1287 } 1288 1289 ALOGE("CameraService::connect evicting conflicting client for camera ID %s", 1290 i->getKey().string()); 1291 evictedClients.push_back(i); 1292 1293 // Log the clients evicted 1294 logEvent(String8::format("EVICT device %s client held by package %s (PID" 1295 " %" PRId32 ", score %" PRId32 ", state %" PRId32 ")\n - Evicted by device %s client for" 1296 " package %s (PID %d, score %" PRId32 ", state %" PRId32 ")", 1297 i->getKey().string(), String8{clientSp->getPackageName()}.string(), 1298 i->getOwnerId(), i->getPriority().getScore(), 1299 i->getPriority().getState(), cameraId.string(), 1300 packageName.string(), clientPid, 1301 priorityScores[priorityScores.size() - 1], 1302 states[states.size() - 1])); 1303 1304 // Notify the client of disconnection 1305 clientSp->notifyError(hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED, 1306 CaptureResultExtras()); 1307 } 1308 } 1309 1310 // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking 1311 // other clients from connecting in mServiceLockWrapper if held 1312 mServiceLock.unlock(); 1313 1314 // Clear caller identity temporarily so client disconnect PID checks work correctly 1315 int64_t token = IPCThreadState::self()->clearCallingIdentity(); 1316 1317 // Destroy evicted clients 1318 for (auto& i : evictedClients) { 1319 // Disconnect is blocking, and should only have returned when HAL has cleaned up 1320 i->getValue()->disconnect(); // Clients will remove themselves from the active client list 1321 } 1322 1323 IPCThreadState::self()->restoreCallingIdentity(token); 1324 1325 for (const auto& i : evictedClients) { 1326 ALOGV("%s: Waiting for disconnect to complete for client for device %s (PID %" PRId32 ")", 1327 __FUNCTION__, i->getKey().string(), i->getOwnerId()); 1328 ret = mActiveClientManager.waitUntilRemoved(i, DEFAULT_DISCONNECT_TIMEOUT_NS); 1329 if (ret == TIMED_OUT) { 1330 ALOGE("%s: Timed out waiting for client for device %s to disconnect, " 1331 "current clients:\n%s", __FUNCTION__, i->getKey().string(), 1332 mActiveClientManager.toString().string()); 1333 return -EBUSY; 1334 } 1335 if (ret != NO_ERROR) { 1336 ALOGE("%s: Received error waiting for client for device %s to disconnect: %s (%d), " 1337 "current clients:\n%s", __FUNCTION__, i->getKey().string(), strerror(-ret), 1338 ret, mActiveClientManager.toString().string()); 1339 return ret; 1340 } 1341 } 1342 1343 evictedClients.clear(); 1344 1345 // Once clients have been disconnected, relock 1346 mServiceLock.lock(); 1347 1348 // Check again if the device was unplugged or something while we weren't holding mServiceLock 1349 if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) { 1350 return ret; 1351 } 1352 1353 *partial = clientDescriptor; 1354 return NO_ERROR; 1355} 1356 1357Status CameraService::connect( 1358 const sp<ICameraClient>& cameraClient, 1359 int cameraId, 1360 const String16& clientPackageName, 1361 int clientUid, 1362 int clientPid, 1363 /*out*/ 1364 sp<ICamera>* device) { 1365 1366 ATRACE_CALL(); 1367 Status ret = Status::ok(); 1368 String8 id = String8::format("%d", cameraId); 1369 sp<Client> client = nullptr; 1370 ret = connectHelper<ICameraClient,Client>(cameraClient, id, 1371 CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, clientUid, clientPid, API_1, 1372 /*legacyMode*/ false, /*shimUpdateOnly*/ false, 1373 /*out*/client); 1374 1375 if(!ret.isOk()) { 1376 logRejected(id, getCallingPid(), String8(clientPackageName), 1377 ret.toString8()); 1378 return ret; 1379 } 1380 1381 *device = client; 1382 return ret; 1383} 1384 1385Status CameraService::connectLegacy( 1386 const sp<ICameraClient>& cameraClient, 1387 int cameraId, int halVersion, 1388 const String16& clientPackageName, 1389 int clientUid, 1390 /*out*/ 1391 sp<ICamera>* device) { 1392 1393 ATRACE_CALL(); 1394 String8 id = String8::format("%d", cameraId); 1395 if (mModule != nullptr) { 1396 int apiVersion = mModule->getModuleApiVersion(); 1397 if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED && 1398 apiVersion < CAMERA_MODULE_API_VERSION_2_3) { 1399 /* 1400 * Either the HAL version is unspecified in which case this just creates 1401 * a camera client selected by the latest device version, or 1402 * it's a particular version in which case the HAL must supported 1403 * the open_legacy call 1404 */ 1405 String8 msg = String8::format("Camera HAL module version %x too old for connectLegacy!", 1406 apiVersion); 1407 ALOGE("%s: %s", 1408 __FUNCTION__, msg.string()); 1409 logRejected(id, getCallingPid(), String8(clientPackageName), 1410 msg); 1411 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string()); 1412 } 1413 } 1414 1415 Status ret = Status::ok(); 1416 sp<Client> client = nullptr; 1417 ret = connectHelper<ICameraClient,Client>(cameraClient, id, halVersion, 1418 clientPackageName, clientUid, USE_CALLING_PID, API_1, 1419 /*legacyMode*/ true, /*shimUpdateOnly*/ false, 1420 /*out*/client); 1421 1422 if(!ret.isOk()) { 1423 logRejected(id, getCallingPid(), String8(clientPackageName), 1424 ret.toString8()); 1425 return ret; 1426 } 1427 1428 *device = client; 1429 return ret; 1430} 1431 1432Status CameraService::connectDevice( 1433 const sp<hardware::camera2::ICameraDeviceCallbacks>& cameraCb, 1434 const String16& cameraId, 1435 const String16& clientPackageName, 1436 int clientUid, 1437 /*out*/ 1438 sp<hardware::camera2::ICameraDeviceUser>* device) { 1439 1440 ATRACE_CALL(); 1441 Status ret = Status::ok(); 1442 String8 id = String8(cameraId); 1443 sp<CameraDeviceClient> client = nullptr; 1444 ret = connectHelper<hardware::camera2::ICameraDeviceCallbacks,CameraDeviceClient>(cameraCb, id, 1445 CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, 1446 clientUid, USE_CALLING_PID, API_2, 1447 /*legacyMode*/ false, /*shimUpdateOnly*/ false, 1448 /*out*/client); 1449 1450 if(!ret.isOk()) { 1451 logRejected(id, getCallingPid(), String8(clientPackageName), 1452 ret.toString8()); 1453 return ret; 1454 } 1455 1456 *device = client; 1457 return ret; 1458} 1459 1460template<class CALLBACK, class CLIENT> 1461Status CameraService::connectHelper(const sp<CALLBACK>& cameraCb, const String8& cameraId, 1462 int halVersion, const String16& clientPackageName, int clientUid, int clientPid, 1463 apiLevel effectiveApiLevel, bool legacyMode, bool shimUpdateOnly, 1464 /*out*/sp<CLIENT>& device) { 1465 binder::Status ret = binder::Status::ok(); 1466 1467 String8 clientName8(clientPackageName); 1468 1469 int originalClientPid = 0; 1470 1471 ALOGI("CameraService::connect call (PID %d \"%s\", camera ID %s) for HAL version %s and " 1472 "Camera API version %d", clientPid, clientName8.string(), cameraId.string(), 1473 (halVersion == -1) ? "default" : std::to_string(halVersion).c_str(), 1474 static_cast<int>(effectiveApiLevel)); 1475 1476 sp<CLIENT> client = nullptr; 1477 { 1478 // Acquire mServiceLock and prevent other clients from connecting 1479 std::unique_ptr<AutoConditionLock> lock = 1480 AutoConditionLock::waitAndAcquire(mServiceLockWrapper, DEFAULT_CONNECT_TIMEOUT_NS); 1481 1482 if (lock == nullptr) { 1483 ALOGE("CameraService::connect (PID %d) rejected (too many other clients connecting)." 1484 , clientPid); 1485 return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE, 1486 "Cannot open camera %s for \"%s\" (PID %d): Too many other clients connecting", 1487 cameraId.string(), clientName8.string(), clientPid); 1488 } 1489 1490 // Enforce client permissions and do basic sanity checks 1491 if(!(ret = validateConnectLocked(cameraId, clientName8, 1492 /*inout*/clientUid, /*inout*/clientPid, /*out*/originalClientPid)).isOk()) { 1493 return ret; 1494 } 1495 1496 // Check the shim parameters after acquiring lock, if they have already been updated and 1497 // we were doing a shim update, return immediately 1498 if (shimUpdateOnly) { 1499 auto cameraState = getCameraState(cameraId); 1500 if (cameraState != nullptr) { 1501 if (!cameraState->getShimParams().isEmpty()) return ret; 1502 } 1503 } 1504 1505 status_t err; 1506 1507 sp<BasicClient> clientTmp = nullptr; 1508 std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>> partial; 1509 if ((err = handleEvictionsLocked(cameraId, originalClientPid, effectiveApiLevel, 1510 IInterface::asBinder(cameraCb), clientName8, /*out*/&clientTmp, 1511 /*out*/&partial)) != NO_ERROR) { 1512 switch (err) { 1513 case -ENODEV: 1514 return STATUS_ERROR_FMT(ERROR_DISCONNECTED, 1515 "No camera device with ID \"%s\" currently available", 1516 cameraId.string()); 1517 case -EBUSY: 1518 return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE, 1519 "Higher-priority client using camera, ID \"%s\" currently unavailable", 1520 cameraId.string()); 1521 default: 1522 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 1523 "Unexpected error %s (%d) opening camera \"%s\"", 1524 strerror(-err), err, cameraId.string()); 1525 } 1526 } 1527 1528 if (clientTmp.get() != nullptr) { 1529 // Handle special case for API1 MediaRecorder where the existing client is returned 1530 device = static_cast<CLIENT*>(clientTmp.get()); 1531 return ret; 1532 } 1533 1534 // give flashlight a chance to close devices if necessary. 1535 mFlashlight->prepareDeviceOpen(cameraId); 1536 1537 int facing = -1; 1538 int deviceVersion = getDeviceVersion(cameraId, /*out*/&facing); 1539 if (facing == -1) { 1540 ALOGE("%s: Unable to get camera device \"%s\" facing", __FUNCTION__, cameraId.string()); 1541 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 1542 "Unable to get camera device \"%s\" facing", cameraId.string()); 1543 } 1544 1545 sp<BasicClient> tmp = nullptr; 1546 if(!(ret = makeClient(this, cameraCb, clientPackageName, cameraId, facing, clientPid, 1547 clientUid, getpid(), legacyMode, halVersion, deviceVersion, effectiveApiLevel, 1548 /*out*/&tmp)).isOk()) { 1549 return ret; 1550 } 1551 client = static_cast<CLIENT*>(tmp.get()); 1552 1553 LOG_ALWAYS_FATAL_IF(client.get() == nullptr, "%s: CameraService in invalid state", 1554 __FUNCTION__); 1555 1556 if (mModule != nullptr) { 1557 err = client->initialize(mModule); 1558 } else { 1559 err = client->initialize(mCameraProviderManager); 1560 } 1561 1562 if (err != OK) { 1563 ALOGE("%s: Could not initialize client from HAL.", __FUNCTION__); 1564 // Errors could be from the HAL module open call or from AppOpsManager 1565 switch(err) { 1566 case BAD_VALUE: 1567 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 1568 "Illegal argument to HAL module for camera \"%s\"", cameraId.string()); 1569 case -EBUSY: 1570 return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE, 1571 "Camera \"%s\" is already open", cameraId.string()); 1572 case -EUSERS: 1573 return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE, 1574 "Too many cameras already open, cannot open camera \"%s\"", 1575 cameraId.string()); 1576 case PERMISSION_DENIED: 1577 return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, 1578 "No permission to open camera \"%s\"", cameraId.string()); 1579 case -EACCES: 1580 return STATUS_ERROR_FMT(ERROR_DISABLED, 1581 "Camera \"%s\" disabled by policy", cameraId.string()); 1582 case -ENODEV: 1583 default: 1584 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 1585 "Failed to initialize camera \"%s\": %s (%d)", cameraId.string(), 1586 strerror(-err), err); 1587 } 1588 } 1589 1590 // Update shim paremeters for legacy clients 1591 if (effectiveApiLevel == API_1) { 1592 // Assume we have always received a Client subclass for API1 1593 sp<Client> shimClient = reinterpret_cast<Client*>(client.get()); 1594 String8 rawParams = shimClient->getParameters(); 1595 CameraParameters params(rawParams); 1596 1597 auto cameraState = getCameraState(cameraId); 1598 if (cameraState != nullptr) { 1599 cameraState->setShimParams(params); 1600 } else { 1601 ALOGE("%s: Cannot update shim parameters for camera %s, no such device exists.", 1602 __FUNCTION__, cameraId.string()); 1603 } 1604 } 1605 1606 if (shimUpdateOnly) { 1607 // If only updating legacy shim parameters, immediately disconnect client 1608 mServiceLock.unlock(); 1609 client->disconnect(); 1610 mServiceLock.lock(); 1611 } else { 1612 // Otherwise, add client to active clients list 1613 finishConnectLocked(client, partial); 1614 } 1615 } // lock is destroyed, allow further connect calls 1616 1617 // Important: release the mutex here so the client can call back into the service from its 1618 // destructor (can be at the end of the call) 1619 device = client; 1620 return ret; 1621} 1622 1623Status CameraService::setTorchMode(const String16& cameraId, bool enabled, 1624 const sp<IBinder>& clientBinder) { 1625 Mutex::Autolock lock(mServiceLock); 1626 1627 ATRACE_CALL(); 1628 if (enabled && clientBinder == nullptr) { 1629 ALOGE("%s: torch client binder is NULL", __FUNCTION__); 1630 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, 1631 "Torch client Binder is null"); 1632 } 1633 1634 String8 id = String8(cameraId.string()); 1635 int uid = getCallingUid(); 1636 1637 // verify id is valid. 1638 auto state = getCameraState(id); 1639 if (state == nullptr) { 1640 ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string()); 1641 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 1642 "Camera ID \"%s\" is a not valid camera ID", id.string()); 1643 } 1644 1645 StatusInternal cameraStatus = state->getStatus(); 1646 if (cameraStatus != StatusInternal::PRESENT && 1647 cameraStatus != StatusInternal::NOT_AVAILABLE) { 1648 ALOGE("%s: camera id is invalid %s, status %d", __FUNCTION__, id.string(), (int)cameraStatus); 1649 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 1650 "Camera ID \"%s\" is a not valid camera ID", id.string()); 1651 } 1652 1653 { 1654 Mutex::Autolock al(mTorchStatusMutex); 1655 TorchModeStatus status; 1656 status_t err = getTorchStatusLocked(id, &status); 1657 if (err != OK) { 1658 if (err == NAME_NOT_FOUND) { 1659 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 1660 "Camera \"%s\" does not have a flash unit", id.string()); 1661 } 1662 ALOGE("%s: getting current torch status failed for camera %s", 1663 __FUNCTION__, id.string()); 1664 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 1665 "Error updating torch status for camera \"%s\": %s (%d)", id.string(), 1666 strerror(-err), err); 1667 } 1668 1669 if (status == TorchModeStatus::NOT_AVAILABLE) { 1670 if (cameraStatus == StatusInternal::NOT_AVAILABLE) { 1671 ALOGE("%s: torch mode of camera %s is not available because " 1672 "camera is in use", __FUNCTION__, id.string()); 1673 return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE, 1674 "Torch for camera \"%s\" is not available due to an existing camera user", 1675 id.string()); 1676 } else { 1677 ALOGE("%s: torch mode of camera %s is not available due to " 1678 "insufficient resources", __FUNCTION__, id.string()); 1679 return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE, 1680 "Torch for camera \"%s\" is not available due to insufficient resources", 1681 id.string()); 1682 } 1683 } 1684 } 1685 1686 { 1687 // Update UID map - this is used in the torch status changed callbacks, so must be done 1688 // before setTorchMode 1689 Mutex::Autolock al(mTorchUidMapMutex); 1690 if (mTorchUidMap.find(id) == mTorchUidMap.end()) { 1691 mTorchUidMap[id].first = uid; 1692 mTorchUidMap[id].second = uid; 1693 } else { 1694 // Set the pending UID 1695 mTorchUidMap[id].first = uid; 1696 } 1697 } 1698 1699 status_t err = mFlashlight->setTorchMode(id, enabled); 1700 1701 if (err != OK) { 1702 int32_t errorCode; 1703 String8 msg; 1704 switch (err) { 1705 case -ENOSYS: 1706 msg = String8::format("Camera \"%s\" has no flashlight", 1707 id.string()); 1708 errorCode = ERROR_ILLEGAL_ARGUMENT; 1709 break; 1710 default: 1711 msg = String8::format( 1712 "Setting torch mode of camera \"%s\" to %d failed: %s (%d)", 1713 id.string(), enabled, strerror(-err), err); 1714 errorCode = ERROR_INVALID_OPERATION; 1715 } 1716 ALOGE("%s: %s", __FUNCTION__, msg.string()); 1717 return STATUS_ERROR(errorCode, msg.string()); 1718 } 1719 1720 { 1721 // update the link to client's death 1722 Mutex::Autolock al(mTorchClientMapMutex); 1723 ssize_t index = mTorchClientMap.indexOfKey(id); 1724 if (enabled) { 1725 if (index == NAME_NOT_FOUND) { 1726 mTorchClientMap.add(id, clientBinder); 1727 } else { 1728 mTorchClientMap.valueAt(index)->unlinkToDeath(this); 1729 mTorchClientMap.replaceValueAt(index, clientBinder); 1730 } 1731 clientBinder->linkToDeath(this); 1732 } else if (index != NAME_NOT_FOUND) { 1733 mTorchClientMap.valueAt(index)->unlinkToDeath(this); 1734 } 1735 } 1736 1737 return Status::ok(); 1738} 1739 1740Status CameraService::notifySystemEvent(int32_t eventId, 1741 const std::vector<int32_t>& args) { 1742 ATRACE_CALL(); 1743 1744 switch(eventId) { 1745 case ICameraService::EVENT_USER_SWITCHED: { 1746 doUserSwitch(/*newUserIds*/ args); 1747 break; 1748 } 1749 case ICameraService::EVENT_NONE: 1750 default: { 1751 ALOGW("%s: Received invalid system event from system_server: %d", __FUNCTION__, 1752 eventId); 1753 break; 1754 } 1755 } 1756 return Status::ok(); 1757} 1758 1759Status CameraService::addListener(const sp<ICameraServiceListener>& listener, 1760 /*out*/ 1761 std::vector<hardware::CameraStatus> *cameraStatuses) { 1762 ATRACE_CALL(); 1763 1764 ALOGV("%s: Add listener %p", __FUNCTION__, listener.get()); 1765 1766 if (listener == nullptr) { 1767 ALOGE("%s: Listener must not be null", __FUNCTION__); 1768 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Null listener given to addListener"); 1769 } 1770 1771 Mutex::Autolock lock(mServiceLock); 1772 1773 { 1774 Mutex::Autolock lock(mStatusListenerLock); 1775 for (auto& it : mListenerList) { 1776 if (IInterface::asBinder(it) == IInterface::asBinder(listener)) { 1777 ALOGW("%s: Tried to add listener %p which was already subscribed", 1778 __FUNCTION__, listener.get()); 1779 return STATUS_ERROR(ERROR_ALREADY_EXISTS, "Listener already registered"); 1780 } 1781 } 1782 1783 mListenerList.push_back(listener); 1784 } 1785 1786 /* Collect current devices and status */ 1787 { 1788 Mutex::Autolock lock(mCameraStatesLock); 1789 for (auto& i : mCameraStates) { 1790 cameraStatuses->emplace_back(i.first, mapToInterface(i.second->getStatus())); 1791 } 1792 } 1793 1794 /* 1795 * Immediately signal current torch status to this listener only 1796 * This may be a subset of all the devices, so don't include it in the response directly 1797 */ 1798 { 1799 Mutex::Autolock al(mTorchStatusMutex); 1800 for (size_t i = 0; i < mTorchStatusMap.size(); i++ ) { 1801 String16 id = String16(mTorchStatusMap.keyAt(i).string()); 1802 listener->onTorchStatusChanged(mapToInterface(mTorchStatusMap.valueAt(i)), id); 1803 } 1804 } 1805 1806 return Status::ok(); 1807} 1808 1809Status CameraService::removeListener(const sp<ICameraServiceListener>& listener) { 1810 ATRACE_CALL(); 1811 1812 ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get()); 1813 1814 if (listener == 0) { 1815 ALOGE("%s: Listener must not be null", __FUNCTION__); 1816 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Null listener given to removeListener"); 1817 } 1818 1819 Mutex::Autolock lock(mServiceLock); 1820 1821 { 1822 Mutex::Autolock lock(mStatusListenerLock); 1823 for (auto it = mListenerList.begin(); it != mListenerList.end(); it++) { 1824 if (IInterface::asBinder(*it) == IInterface::asBinder(listener)) { 1825 mListenerList.erase(it); 1826 return Status::ok(); 1827 } 1828 } 1829 } 1830 1831 ALOGW("%s: Tried to remove a listener %p which was not subscribed", 1832 __FUNCTION__, listener.get()); 1833 1834 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Unregistered listener given to removeListener"); 1835} 1836 1837Status CameraService::getLegacyParameters(int cameraId, /*out*/String16* parameters) { 1838 1839 ATRACE_CALL(); 1840 ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId); 1841 1842 if (parameters == NULL) { 1843 ALOGE("%s: parameters must not be null", __FUNCTION__); 1844 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Parameters must not be null"); 1845 } 1846 1847 Status ret = Status::ok(); 1848 1849 CameraParameters shimParams; 1850 if (!(ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)).isOk()) { 1851 // Error logged by caller 1852 return ret; 1853 } 1854 1855 String8 shimParamsString8 = shimParams.flatten(); 1856 String16 shimParamsString16 = String16(shimParamsString8); 1857 1858 *parameters = shimParamsString16; 1859 1860 return ret; 1861} 1862 1863Status CameraService::supportsCameraApi(const String16& cameraId, int apiVersion, 1864 /*out*/ bool *isSupported) { 1865 ATRACE_CALL(); 1866 1867 const String8 id = String8(cameraId); 1868 1869 ALOGV("%s: for camera ID = %s", __FUNCTION__, id.string()); 1870 1871 switch (apiVersion) { 1872 case API_VERSION_1: 1873 case API_VERSION_2: 1874 break; 1875 default: 1876 String8 msg = String8::format("Unknown API version %d", apiVersion); 1877 ALOGE("%s: %s", __FUNCTION__, msg.string()); 1878 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string()); 1879 } 1880 1881 int facing = -1; 1882 int deviceVersion = getDeviceVersion(id, /*out*/ &facing); 1883 if (facing == -1) { 1884 String8 msg = String8::format("Unable to get facing for camera device %s", 1885 id.string()); 1886 ALOGE("%s: %s", __FUNCTION__, msg.string()); 1887 return STATUS_ERROR(ERROR_INVALID_OPERATION, msg.string()); 1888 } 1889 switch(deviceVersion) { 1890 case CAMERA_DEVICE_API_VERSION_1_0: 1891 case CAMERA_DEVICE_API_VERSION_3_0: 1892 case CAMERA_DEVICE_API_VERSION_3_1: 1893 if (apiVersion == API_VERSION_2) { 1894 ALOGV("%s: Camera id %s uses HAL version %d <3.2, doesn't support api2 without shim", 1895 __FUNCTION__, id.string(), deviceVersion); 1896 *isSupported = false; 1897 } else { // if (apiVersion == API_VERSION_1) { 1898 ALOGV("%s: Camera id %s uses older HAL before 3.2, but api1 is always supported", 1899 __FUNCTION__, id.string()); 1900 *isSupported = true; 1901 } 1902 break; 1903 case CAMERA_DEVICE_API_VERSION_3_2: 1904 case CAMERA_DEVICE_API_VERSION_3_3: 1905 case CAMERA_DEVICE_API_VERSION_3_4: 1906 ALOGV("%s: Camera id %s uses HAL3.2 or newer, supports api1/api2 directly", 1907 __FUNCTION__, id.string()); 1908 *isSupported = true; 1909 break; 1910 case -1: { 1911 String8 msg = String8::format("Unknown camera ID %s", id.string()); 1912 ALOGE("%s: %s", __FUNCTION__, msg.string()); 1913 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string()); 1914 } 1915 default: { 1916 String8 msg = String8::format("Unknown device version %x for device %s", 1917 deviceVersion, id.string()); 1918 ALOGE("%s: %s", __FUNCTION__, msg.string()); 1919 return STATUS_ERROR(ERROR_INVALID_OPERATION, msg.string()); 1920 } 1921 } 1922 1923 return Status::ok(); 1924} 1925 1926void CameraService::removeByClient(const BasicClient* client) { 1927 Mutex::Autolock lock(mServiceLock); 1928 for (auto& i : mActiveClientManager.getAll()) { 1929 auto clientSp = i->getValue(); 1930 if (clientSp.get() == client) { 1931 mActiveClientManager.remove(i); 1932 } 1933 } 1934} 1935 1936bool CameraService::evictClientIdByRemote(const wp<IBinder>& remote) { 1937 const int callingPid = getCallingPid(); 1938 const int servicePid = getpid(); 1939 bool ret = false; 1940 { 1941 // Acquire mServiceLock and prevent other clients from connecting 1942 std::unique_ptr<AutoConditionLock> lock = 1943 AutoConditionLock::waitAndAcquire(mServiceLockWrapper); 1944 1945 1946 std::vector<sp<BasicClient>> evicted; 1947 for (auto& i : mActiveClientManager.getAll()) { 1948 auto clientSp = i->getValue(); 1949 if (clientSp.get() == nullptr) { 1950 ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__); 1951 mActiveClientManager.remove(i); 1952 continue; 1953 } 1954 if (remote == clientSp->getRemote() && (callingPid == servicePid || 1955 callingPid == clientSp->getClientPid())) { 1956 mActiveClientManager.remove(i); 1957 evicted.push_back(clientSp); 1958 1959 // Notify the client of disconnection 1960 clientSp->notifyError( 1961 hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED, 1962 CaptureResultExtras()); 1963 } 1964 } 1965 1966 // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking 1967 // other clients from connecting in mServiceLockWrapper if held 1968 mServiceLock.unlock(); 1969 1970 // Do not clear caller identity, remote caller should be client proccess 1971 1972 for (auto& i : evicted) { 1973 if (i.get() != nullptr) { 1974 i->disconnect(); 1975 ret = true; 1976 } 1977 } 1978 1979 // Reacquire mServiceLock 1980 mServiceLock.lock(); 1981 1982 } // lock is destroyed, allow further connect calls 1983 1984 return ret; 1985} 1986 1987 1988/** 1989 * Check camera capabilities, such as support for basic color operation 1990 * Also check that the device HAL version is still in support 1991 */ 1992int CameraService::checkCameraCapabilities(int id, camera_info info, int *latestStrangeCameraId) { 1993 if (mModule == nullptr) return NO_INIT; 1994 1995 // device_version undefined in CAMERA_MODULE_API_VERSION_1_0, 1996 // All CAMERA_MODULE_API_VERSION_1_0 devices are backward-compatible 1997 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) { 1998 // Verify the device version is in the supported range 1999 switch (info.device_version) { 2000 case CAMERA_DEVICE_API_VERSION_1_0: 2001 case CAMERA_DEVICE_API_VERSION_3_0: 2002 case CAMERA_DEVICE_API_VERSION_3_1: 2003 case CAMERA_DEVICE_API_VERSION_3_2: 2004 case CAMERA_DEVICE_API_VERSION_3_3: 2005 case CAMERA_DEVICE_API_VERSION_3_4: 2006 // in support 2007 break; 2008 case CAMERA_DEVICE_API_VERSION_2_0: 2009 case CAMERA_DEVICE_API_VERSION_2_1: 2010 // no longer supported 2011 default: 2012 ALOGE("%s: Device %d has HAL version %x, which is not supported", 2013 __FUNCTION__, id, info.device_version); 2014 String8 msg = String8::format( 2015 "Unsupported device HAL version %x for device %d", 2016 info.device_version, id); 2017 logServiceError(msg.string(), NO_INIT); 2018 return NO_INIT; 2019 } 2020 } 2021 2022 // Assume all devices pre-v3.3 are backward-compatible 2023 bool isBackwardCompatible = true; 2024 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0 2025 && info.device_version >= CAMERA_DEVICE_API_VERSION_3_3) { 2026 isBackwardCompatible = false; 2027 status_t res; 2028 camera_metadata_ro_entry_t caps; 2029 res = find_camera_metadata_ro_entry( 2030 info.static_camera_characteristics, 2031 ANDROID_REQUEST_AVAILABLE_CAPABILITIES, 2032 &caps); 2033 if (res != 0) { 2034 ALOGW("%s: Unable to find camera capabilities for camera device %d", 2035 __FUNCTION__, id); 2036 caps.count = 0; 2037 } 2038 for (size_t i = 0; i < caps.count; i++) { 2039 if (caps.data.u8[i] == 2040 ANDROID_REQUEST_AVAILABLE_CAPABILITIES_BACKWARD_COMPATIBLE) { 2041 isBackwardCompatible = true; 2042 break; 2043 } 2044 } 2045 } 2046 2047 if (!isBackwardCompatible) { 2048 mNumberOfNormalCameras--; 2049 *latestStrangeCameraId = id; 2050 } else { 2051 if (id > *latestStrangeCameraId) { 2052 ALOGE("%s: Normal camera ID %d higher than strange camera ID %d. " 2053 "This is not allowed due backward-compatibility requirements", 2054 __FUNCTION__, id, *latestStrangeCameraId); 2055 logServiceError("Invalid order of camera devices", NO_INIT); 2056 mNumberOfCameras = 0; 2057 mNumberOfNormalCameras = 0; 2058 return NO_INIT; 2059 } 2060 } 2061 return OK; 2062} 2063 2064std::shared_ptr<CameraService::CameraState> CameraService::getCameraState( 2065 const String8& cameraId) const { 2066 std::shared_ptr<CameraState> state; 2067 { 2068 Mutex::Autolock lock(mCameraStatesLock); 2069 auto iter = mCameraStates.find(cameraId); 2070 if (iter != mCameraStates.end()) { 2071 state = iter->second; 2072 } 2073 } 2074 return state; 2075} 2076 2077sp<CameraService::BasicClient> CameraService::removeClientLocked(const String8& cameraId) { 2078 // Remove from active clients list 2079 auto clientDescriptorPtr = mActiveClientManager.remove(cameraId); 2080 if (clientDescriptorPtr == nullptr) { 2081 ALOGW("%s: Could not evict client, no client for camera ID %s", __FUNCTION__, 2082 cameraId.string()); 2083 return sp<BasicClient>{nullptr}; 2084 } 2085 2086 return clientDescriptorPtr->getValue(); 2087} 2088 2089void CameraService::doUserSwitch(const std::vector<int32_t>& newUserIds) { 2090 // Acquire mServiceLock and prevent other clients from connecting 2091 std::unique_ptr<AutoConditionLock> lock = 2092 AutoConditionLock::waitAndAcquire(mServiceLockWrapper); 2093 2094 std::set<userid_t> newAllowedUsers; 2095 for (size_t i = 0; i < newUserIds.size(); i++) { 2096 if (newUserIds[i] < 0) { 2097 ALOGE("%s: Bad user ID %d given during user switch, ignoring.", 2098 __FUNCTION__, newUserIds[i]); 2099 return; 2100 } 2101 newAllowedUsers.insert(static_cast<userid_t>(newUserIds[i])); 2102 } 2103 2104 2105 if (newAllowedUsers == mAllowedUsers) { 2106 ALOGW("%s: Received notification of user switch with no updated user IDs.", __FUNCTION__); 2107 return; 2108 } 2109 2110 logUserSwitch(mAllowedUsers, newAllowedUsers); 2111 2112 mAllowedUsers = std::move(newAllowedUsers); 2113 2114 // Current user has switched, evict all current clients. 2115 std::vector<sp<BasicClient>> evicted; 2116 for (auto& i : mActiveClientManager.getAll()) { 2117 auto clientSp = i->getValue(); 2118 2119 if (clientSp.get() == nullptr) { 2120 ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__); 2121 continue; 2122 } 2123 2124 // Don't evict clients that are still allowed. 2125 uid_t clientUid = clientSp->getClientUid(); 2126 userid_t clientUserId = multiuser_get_user_id(clientUid); 2127 if (mAllowedUsers.find(clientUserId) != mAllowedUsers.end()) { 2128 continue; 2129 } 2130 2131 evicted.push_back(clientSp); 2132 2133 String8 curTime = getFormattedCurrentTime(); 2134 2135 ALOGE("Evicting conflicting client for camera ID %s due to user change", 2136 i->getKey().string()); 2137 2138 // Log the clients evicted 2139 logEvent(String8::format("EVICT device %s client held by package %s (PID %" 2140 PRId32 ", score %" PRId32 ", state %" PRId32 ")\n - Evicted due" 2141 " to user switch.", i->getKey().string(), 2142 String8{clientSp->getPackageName()}.string(), 2143 i->getOwnerId(), i->getPriority().getScore(), 2144 i->getPriority().getState())); 2145 2146 } 2147 2148 // Do not hold mServiceLock while disconnecting clients, but retain the condition 2149 // blocking other clients from connecting in mServiceLockWrapper if held. 2150 mServiceLock.unlock(); 2151 2152 // Clear caller identity temporarily so client disconnect PID checks work correctly 2153 int64_t token = IPCThreadState::self()->clearCallingIdentity(); 2154 2155 for (auto& i : evicted) { 2156 i->disconnect(); 2157 } 2158 2159 IPCThreadState::self()->restoreCallingIdentity(token); 2160 2161 // Reacquire mServiceLock 2162 mServiceLock.lock(); 2163} 2164 2165void CameraService::logEvent(const char* event) { 2166 String8 curTime = getFormattedCurrentTime(); 2167 Mutex::Autolock l(mLogLock); 2168 mEventLog.add(String8::format("%s : %s", curTime.string(), event)); 2169} 2170 2171void CameraService::logDisconnected(const char* cameraId, int clientPid, 2172 const char* clientPackage) { 2173 // Log the clients evicted 2174 logEvent(String8::format("DISCONNECT device %s client for package %s (PID %d)", cameraId, 2175 clientPackage, clientPid)); 2176} 2177 2178void CameraService::logConnected(const char* cameraId, int clientPid, 2179 const char* clientPackage) { 2180 // Log the clients evicted 2181 logEvent(String8::format("CONNECT device %s client for package %s (PID %d)", cameraId, 2182 clientPackage, clientPid)); 2183} 2184 2185void CameraService::logRejected(const char* cameraId, int clientPid, 2186 const char* clientPackage, const char* reason) { 2187 // Log the client rejected 2188 logEvent(String8::format("REJECT device %s client for package %s (PID %d), reason: (%s)", 2189 cameraId, clientPackage, clientPid, reason)); 2190} 2191 2192void CameraService::logUserSwitch(const std::set<userid_t>& oldUserIds, 2193 const std::set<userid_t>& newUserIds) { 2194 String8 newUsers = toString(newUserIds); 2195 String8 oldUsers = toString(oldUserIds); 2196 if (oldUsers.size() == 0) { 2197 oldUsers = "<None>"; 2198 } 2199 // Log the new and old users 2200 logEvent(String8::format("USER_SWITCH previous allowed user IDs: %s, current allowed user IDs: %s", 2201 oldUsers.string(), newUsers.string())); 2202} 2203 2204void CameraService::logDeviceRemoved(const char* cameraId, const char* reason) { 2205 // Log the device removal 2206 logEvent(String8::format("REMOVE device %s, reason: (%s)", cameraId, reason)); 2207} 2208 2209void CameraService::logDeviceAdded(const char* cameraId, const char* reason) { 2210 // Log the device removal 2211 logEvent(String8::format("ADD device %s, reason: (%s)", cameraId, reason)); 2212} 2213 2214void CameraService::logClientDied(int clientPid, const char* reason) { 2215 // Log the device removal 2216 logEvent(String8::format("DIED client(s) with PID %d, reason: (%s)", clientPid, reason)); 2217} 2218 2219void CameraService::logServiceError(const char* msg, int errorCode) { 2220 String8 curTime = getFormattedCurrentTime(); 2221 logEvent(String8::format("SERVICE ERROR: %s : %d (%s)", msg, errorCode, strerror(-errorCode))); 2222} 2223 2224status_t CameraService::onTransact(uint32_t code, const Parcel& data, Parcel* reply, 2225 uint32_t flags) { 2226 2227 const int pid = getCallingPid(); 2228 const int selfPid = getpid(); 2229 2230 // Permission checks 2231 switch (code) { 2232 case BnCameraService::NOTIFYSYSTEMEVENT: { 2233 if (pid != selfPid) { 2234 // Ensure we're being called by system_server, or similar process with 2235 // permissions to notify the camera service about system events 2236 if (!checkCallingPermission( 2237 String16("android.permission.CAMERA_SEND_SYSTEM_EVENTS"))) { 2238 const int uid = getCallingUid(); 2239 ALOGE("Permission Denial: cannot send updates to camera service about system" 2240 " events from pid=%d, uid=%d", pid, uid); 2241 return PERMISSION_DENIED; 2242 } 2243 } 2244 break; 2245 } 2246 } 2247 2248 return BnCameraService::onTransact(code, data, reply, flags); 2249} 2250 2251// We share the media players for shutter and recording sound for all clients. 2252// A reference count is kept to determine when we will actually release the 2253// media players. 2254 2255MediaPlayer* CameraService::newMediaPlayer(const char *file) { 2256 MediaPlayer* mp = new MediaPlayer(); 2257 if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) { 2258 mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE); 2259 mp->prepare(); 2260 } else { 2261 ALOGE("Failed to load CameraService sounds: %s", file); 2262 return NULL; 2263 } 2264 return mp; 2265} 2266 2267void CameraService::loadSound() { 2268 ATRACE_CALL(); 2269 2270 Mutex::Autolock lock(mSoundLock); 2271 LOG1("CameraService::loadSound ref=%d", mSoundRef); 2272 if (mSoundRef++) return; 2273 2274 mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg"); 2275 mSoundPlayer[SOUND_RECORDING_START] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg"); 2276 mSoundPlayer[SOUND_RECORDING_STOP] = newMediaPlayer("/system/media/audio/ui/VideoStop.ogg"); 2277} 2278 2279void CameraService::releaseSound() { 2280 Mutex::Autolock lock(mSoundLock); 2281 LOG1("CameraService::releaseSound ref=%d", mSoundRef); 2282 if (--mSoundRef) return; 2283 2284 for (int i = 0; i < NUM_SOUNDS; i++) { 2285 if (mSoundPlayer[i] != 0) { 2286 mSoundPlayer[i]->disconnect(); 2287 mSoundPlayer[i].clear(); 2288 } 2289 } 2290} 2291 2292void CameraService::playSound(sound_kind kind) { 2293 ATRACE_CALL(); 2294 2295 LOG1("playSound(%d)", kind); 2296 Mutex::Autolock lock(mSoundLock); 2297 sp<MediaPlayer> player = mSoundPlayer[kind]; 2298 if (player != 0) { 2299 player->seekTo(0); 2300 player->start(); 2301 } 2302} 2303 2304// ---------------------------------------------------------------------------- 2305 2306CameraService::Client::Client(const sp<CameraService>& cameraService, 2307 const sp<ICameraClient>& cameraClient, 2308 const String16& clientPackageName, 2309 const String8& cameraIdStr, int cameraFacing, 2310 int clientPid, uid_t clientUid, 2311 int servicePid) : 2312 CameraService::BasicClient(cameraService, 2313 IInterface::asBinder(cameraClient), 2314 clientPackageName, 2315 cameraIdStr, cameraFacing, 2316 clientPid, clientUid, 2317 servicePid), 2318 mCameraId(CameraService::cameraIdToInt(cameraIdStr)) 2319{ 2320 int callingPid = getCallingPid(); 2321 LOG1("Client::Client E (pid %d, id %d)", callingPid, mCameraId); 2322 2323 mRemoteCallback = cameraClient; 2324 2325 cameraService->loadSound(); 2326 2327 LOG1("Client::Client X (pid %d, id %d)", callingPid, mCameraId); 2328} 2329 2330// tear down the client 2331CameraService::Client::~Client() { 2332 ALOGV("~Client"); 2333 mDestructionStarted = true; 2334 2335 sCameraService->releaseSound(); 2336 // unconditionally disconnect. function is idempotent 2337 Client::disconnect(); 2338} 2339 2340sp<CameraService> CameraService::BasicClient::BasicClient::sCameraService; 2341 2342CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService, 2343 const sp<IBinder>& remoteCallback, 2344 const String16& clientPackageName, 2345 const String8& cameraIdStr, int cameraFacing, 2346 int clientPid, uid_t clientUid, 2347 int servicePid): 2348 mCameraIdStr(cameraIdStr), mCameraFacing(cameraFacing), 2349 mClientPackageName(clientPackageName), mClientPid(clientPid), mClientUid(clientUid), 2350 mServicePid(servicePid), 2351 mDisconnected(false), 2352 mRemoteBinder(remoteCallback) 2353{ 2354 if (sCameraService == nullptr) { 2355 sCameraService = cameraService; 2356 } 2357 mOpsActive = false; 2358 mDestructionStarted = false; 2359 2360 // In some cases the calling code has no access to the package it runs under. 2361 // For example, NDK camera API. 2362 // In this case we will get the packages for the calling UID and pick the first one 2363 // for attributing the app op. This will work correctly for runtime permissions 2364 // as for legacy apps we will toggle the app op for all packages in the UID. 2365 // The caveat is that the operation may be attributed to the wrong package and 2366 // stats based on app ops may be slightly off. 2367 if (mClientPackageName.size() <= 0) { 2368 sp<IServiceManager> sm = defaultServiceManager(); 2369 sp<IBinder> binder = sm->getService(String16(kPermissionServiceName)); 2370 if (binder == 0) { 2371 ALOGE("Cannot get permission service"); 2372 // Leave mClientPackageName unchanged (empty) and the further interaction 2373 // with camera will fail in BasicClient::startCameraOps 2374 return; 2375 } 2376 2377 sp<IPermissionController> permCtrl = interface_cast<IPermissionController>(binder); 2378 Vector<String16> packages; 2379 2380 permCtrl->getPackagesForUid(mClientUid, packages); 2381 2382 if (packages.isEmpty()) { 2383 ALOGE("No packages for calling UID"); 2384 // Leave mClientPackageName unchanged (empty) and the further interaction 2385 // with camera will fail in BasicClient::startCameraOps 2386 return; 2387 } 2388 mClientPackageName = packages[0]; 2389 } 2390} 2391 2392CameraService::BasicClient::~BasicClient() { 2393 ALOGV("~BasicClient"); 2394 mDestructionStarted = true; 2395} 2396 2397binder::Status CameraService::BasicClient::disconnect() { 2398 binder::Status res = Status::ok(); 2399 if (mDisconnected) { 2400 return res; 2401 } 2402 mDisconnected = true; 2403 2404 sCameraService->removeByClient(this); 2405 sCameraService->logDisconnected(mCameraIdStr, mClientPid, 2406 String8(mClientPackageName)); 2407 2408 sp<IBinder> remote = getRemote(); 2409 if (remote != nullptr) { 2410 remote->unlinkToDeath(sCameraService); 2411 } 2412 2413 finishCameraOps(); 2414 // Notify flashlight that a camera device is closed. 2415 sCameraService->mFlashlight->deviceClosed(mCameraIdStr); 2416 ALOGI("%s: Disconnected client for camera %s for PID %d", __FUNCTION__, mCameraIdStr.string(), 2417 mClientPid); 2418 2419 // client shouldn't be able to call into us anymore 2420 mClientPid = 0; 2421 2422 return res; 2423} 2424 2425status_t CameraService::BasicClient::dump(int, const Vector<String16>&) { 2426 // No dumping of clients directly over Binder, 2427 // must go through CameraService::dump 2428 android_errorWriteWithInfoLog(SN_EVENT_LOG_ID, "26265403", 2429 IPCThreadState::self()->getCallingUid(), NULL, 0); 2430 return OK; 2431} 2432 2433String16 CameraService::BasicClient::getPackageName() const { 2434 return mClientPackageName; 2435} 2436 2437 2438int CameraService::BasicClient::getClientPid() const { 2439 return mClientPid; 2440} 2441 2442uid_t CameraService::BasicClient::getClientUid() const { 2443 return mClientUid; 2444} 2445 2446bool CameraService::BasicClient::canCastToApiClient(apiLevel level) const { 2447 // Defaults to API2. 2448 return level == API_2; 2449} 2450 2451status_t CameraService::BasicClient::startCameraOps() { 2452 ATRACE_CALL(); 2453 2454 int32_t res; 2455 // Notify app ops that the camera is not available 2456 mOpsCallback = new OpsCallback(this); 2457 2458 { 2459 ALOGV("%s: Start camera ops, package name = %s, client UID = %d", 2460 __FUNCTION__, String8(mClientPackageName).string(), mClientUid); 2461 } 2462 2463 mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA, 2464 mClientPackageName, mOpsCallback); 2465 res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA, 2466 mClientUid, mClientPackageName); 2467 2468 if (res == AppOpsManager::MODE_ERRORED) { 2469 ALOGI("Camera %s: Access for \"%s\" has been revoked", 2470 mCameraIdStr.string(), String8(mClientPackageName).string()); 2471 return PERMISSION_DENIED; 2472 } 2473 2474 if (res == AppOpsManager::MODE_IGNORED) { 2475 ALOGI("Camera %s: Access for \"%s\" has been restricted", 2476 mCameraIdStr.string(), String8(mClientPackageName).string()); 2477 // Return the same error as for device policy manager rejection 2478 return -EACCES; 2479 } 2480 2481 mOpsActive = true; 2482 2483 // Transition device availability listeners from PRESENT -> NOT_AVAILABLE 2484 sCameraService->updateStatus(StatusInternal::NOT_AVAILABLE, mCameraIdStr); 2485 2486 // Transition device state to OPEN 2487 sCameraService->updateProxyDeviceState(ICameraServiceProxy::CAMERA_STATE_OPEN, 2488 mCameraIdStr); 2489 2490 return OK; 2491} 2492 2493status_t CameraService::BasicClient::finishCameraOps() { 2494 ATRACE_CALL(); 2495 2496 // Check if startCameraOps succeeded, and if so, finish the camera op 2497 if (mOpsActive) { 2498 // Notify app ops that the camera is available again 2499 mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid, 2500 mClientPackageName); 2501 mOpsActive = false; 2502 2503 std::initializer_list<StatusInternal> rejected = {StatusInternal::PRESENT, 2504 StatusInternal::ENUMERATING}; 2505 2506 // Transition to PRESENT if the camera is not in either of the rejected states 2507 sCameraService->updateStatus(StatusInternal::PRESENT, 2508 mCameraIdStr, rejected); 2509 2510 // Transition device state to CLOSED 2511 sCameraService->updateProxyDeviceState(ICameraServiceProxy::CAMERA_STATE_CLOSED, 2512 mCameraIdStr); 2513 } 2514 // Always stop watching, even if no camera op is active 2515 if (mOpsCallback != NULL) { 2516 mAppOpsManager.stopWatchingMode(mOpsCallback); 2517 } 2518 mOpsCallback.clear(); 2519 2520 return OK; 2521} 2522 2523void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) { 2524 ATRACE_CALL(); 2525 2526 String8 name(packageName); 2527 String8 myName(mClientPackageName); 2528 2529 if (op != AppOpsManager::OP_CAMERA) { 2530 ALOGW("Unexpected app ops notification received: %d", op); 2531 return; 2532 } 2533 2534 int32_t res; 2535 res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA, 2536 mClientUid, mClientPackageName); 2537 ALOGV("checkOp returns: %d, %s ", res, 2538 res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" : 2539 res == AppOpsManager::MODE_IGNORED ? "IGNORED" : 2540 res == AppOpsManager::MODE_ERRORED ? "ERRORED" : 2541 "UNKNOWN"); 2542 2543 if (res != AppOpsManager::MODE_ALLOWED) { 2544 ALOGI("Camera %s: Access for \"%s\" revoked", mCameraIdStr.string(), 2545 myName.string()); 2546 // Reset the client PID to allow server-initiated disconnect, 2547 // and to prevent further calls by client. 2548 mClientPid = getCallingPid(); 2549 CaptureResultExtras resultExtras; // a dummy result (invalid) 2550 notifyError(hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras); 2551 disconnect(); 2552 } 2553} 2554 2555// ---------------------------------------------------------------------------- 2556 2557void CameraService::Client::notifyError(int32_t errorCode, 2558 const CaptureResultExtras& resultExtras) { 2559 (void) errorCode; 2560 (void) resultExtras; 2561 if (mRemoteCallback != NULL) { 2562 mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0); 2563 } else { 2564 ALOGE("mRemoteCallback is NULL!!"); 2565 } 2566} 2567 2568// NOTE: function is idempotent 2569binder::Status CameraService::Client::disconnect() { 2570 ALOGV("Client::disconnect"); 2571 return BasicClient::disconnect(); 2572} 2573 2574bool CameraService::Client::canCastToApiClient(apiLevel level) const { 2575 return level == API_1; 2576} 2577 2578CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client): 2579 mClient(client) { 2580} 2581 2582void CameraService::Client::OpsCallback::opChanged(int32_t op, 2583 const String16& packageName) { 2584 sp<BasicClient> client = mClient.promote(); 2585 if (client != NULL) { 2586 client->opChanged(op, packageName); 2587 } 2588} 2589 2590// ---------------------------------------------------------------------------- 2591// CameraState 2592// ---------------------------------------------------------------------------- 2593 2594CameraService::CameraState::CameraState(const String8& id, int cost, 2595 const std::set<String8>& conflicting) : mId(id), 2596 mStatus(StatusInternal::PRESENT), mCost(cost), mConflicting(conflicting) {} 2597 2598CameraService::CameraState::~CameraState() {} 2599 2600CameraService::StatusInternal CameraService::CameraState::getStatus() const { 2601 Mutex::Autolock lock(mStatusLock); 2602 return mStatus; 2603} 2604 2605CameraParameters CameraService::CameraState::getShimParams() const { 2606 return mShimParams; 2607} 2608 2609void CameraService::CameraState::setShimParams(const CameraParameters& params) { 2610 mShimParams = params; 2611} 2612 2613int CameraService::CameraState::getCost() const { 2614 return mCost; 2615} 2616 2617std::set<String8> CameraService::CameraState::getConflicting() const { 2618 return mConflicting; 2619} 2620 2621String8 CameraService::CameraState::getId() const { 2622 return mId; 2623} 2624 2625// ---------------------------------------------------------------------------- 2626// ClientEventListener 2627// ---------------------------------------------------------------------------- 2628 2629void CameraService::ClientEventListener::onClientAdded( 2630 const resource_policy::ClientDescriptor<String8, 2631 sp<CameraService::BasicClient>>& descriptor) { 2632 const auto& basicClient = descriptor.getValue(); 2633 if (basicClient.get() != nullptr) { 2634 BatteryNotifier& notifier(BatteryNotifier::getInstance()); 2635 notifier.noteStartCamera(descriptor.getKey(), 2636 static_cast<int>(basicClient->getClientUid())); 2637 } 2638} 2639 2640void CameraService::ClientEventListener::onClientRemoved( 2641 const resource_policy::ClientDescriptor<String8, 2642 sp<CameraService::BasicClient>>& descriptor) { 2643 const auto& basicClient = descriptor.getValue(); 2644 if (basicClient.get() != nullptr) { 2645 BatteryNotifier& notifier(BatteryNotifier::getInstance()); 2646 notifier.noteStopCamera(descriptor.getKey(), 2647 static_cast<int>(basicClient->getClientUid())); 2648 } 2649} 2650 2651 2652// ---------------------------------------------------------------------------- 2653// CameraClientManager 2654// ---------------------------------------------------------------------------- 2655 2656CameraService::CameraClientManager::CameraClientManager() { 2657 setListener(std::make_shared<ClientEventListener>()); 2658} 2659 2660CameraService::CameraClientManager::~CameraClientManager() {} 2661 2662sp<CameraService::BasicClient> CameraService::CameraClientManager::getCameraClient( 2663 const String8& id) const { 2664 auto descriptor = get(id); 2665 if (descriptor == nullptr) { 2666 return sp<BasicClient>{nullptr}; 2667 } 2668 return descriptor->getValue(); 2669} 2670 2671String8 CameraService::CameraClientManager::toString() const { 2672 auto all = getAll(); 2673 String8 ret("["); 2674 bool hasAny = false; 2675 for (auto& i : all) { 2676 hasAny = true; 2677 String8 key = i->getKey(); 2678 int32_t cost = i->getCost(); 2679 int32_t pid = i->getOwnerId(); 2680 int32_t score = i->getPriority().getScore(); 2681 int32_t state = i->getPriority().getState(); 2682 auto conflicting = i->getConflicting(); 2683 auto clientSp = i->getValue(); 2684 String8 packageName; 2685 userid_t clientUserId = 0; 2686 if (clientSp.get() != nullptr) { 2687 packageName = String8{clientSp->getPackageName()}; 2688 uid_t clientUid = clientSp->getClientUid(); 2689 clientUserId = multiuser_get_user_id(clientUid); 2690 } 2691 ret.appendFormat("\n(Camera ID: %s, Cost: %" PRId32 ", PID: %" PRId32 ", Score: %" 2692 PRId32 ", State: %" PRId32, key.string(), cost, pid, score, state); 2693 2694 if (clientSp.get() != nullptr) { 2695 ret.appendFormat("User Id: %d, ", clientUserId); 2696 } 2697 if (packageName.size() != 0) { 2698 ret.appendFormat("Client Package Name: %s", packageName.string()); 2699 } 2700 2701 ret.append(", Conflicting Client Devices: {"); 2702 for (auto& j : conflicting) { 2703 ret.appendFormat("%s, ", j.string()); 2704 } 2705 ret.append("})"); 2706 } 2707 if (hasAny) ret.append("\n"); 2708 ret.append("]\n"); 2709 return ret; 2710} 2711 2712CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor( 2713 const String8& key, const sp<BasicClient>& value, int32_t cost, 2714 const std::set<String8>& conflictingKeys, int32_t score, int32_t ownerId, 2715 int32_t state) { 2716 2717 return std::make_shared<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>( 2718 key, value, cost, conflictingKeys, score, ownerId, state); 2719} 2720 2721CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor( 2722 const sp<BasicClient>& value, const CameraService::DescriptorPtr& partial) { 2723 return makeClientDescriptor(partial->getKey(), value, partial->getCost(), 2724 partial->getConflicting(), partial->getPriority().getScore(), 2725 partial->getOwnerId(), partial->getPriority().getState()); 2726} 2727 2728// ---------------------------------------------------------------------------- 2729 2730static const int kDumpLockRetries = 50; 2731static const int kDumpLockSleep = 60000; 2732 2733static bool tryLock(Mutex& mutex) 2734{ 2735 bool locked = false; 2736 for (int i = 0; i < kDumpLockRetries; ++i) { 2737 if (mutex.tryLock() == NO_ERROR) { 2738 locked = true; 2739 break; 2740 } 2741 usleep(kDumpLockSleep); 2742 } 2743 return locked; 2744} 2745 2746status_t CameraService::dump(int fd, const Vector<String16>& args) { 2747 ATRACE_CALL(); 2748 2749 if (checkCallingPermission(String16("android.permission.DUMP")) == false) { 2750 dprintf(fd, "Permission Denial: can't dump CameraService from pid=%d, uid=%d\n", 2751 getCallingPid(), 2752 getCallingUid()); 2753 return NO_ERROR; 2754 } 2755 bool locked = tryLock(mServiceLock); 2756 // failed to lock - CameraService is probably deadlocked 2757 if (!locked) { 2758 dprintf(fd, "!! CameraService may be deadlocked !!\n"); 2759 } 2760 2761 if (!mInitialized) { 2762 dprintf(fd, "!! No camera HAL available !!\n"); 2763 2764 // Dump event log for error information 2765 dumpEventLog(fd); 2766 2767 if (locked) mServiceLock.unlock(); 2768 return NO_ERROR; 2769 } 2770 dprintf(fd, "\n== Service global info: ==\n\n"); 2771 dprintf(fd, "Number of camera devices: %d\n", mNumberOfCameras); 2772 dprintf(fd, "Number of normal camera devices: %d\n", mNumberOfNormalCameras); 2773 String8 activeClientString = mActiveClientManager.toString(); 2774 dprintf(fd, "Active Camera Clients:\n%s", activeClientString.string()); 2775 dprintf(fd, "Allowed user IDs: %s\n", toString(mAllowedUsers).string()); 2776 2777 dumpEventLog(fd); 2778 2779 bool stateLocked = tryLock(mCameraStatesLock); 2780 if (!stateLocked) { 2781 dprintf(fd, "CameraStates in use, may be deadlocked\n"); 2782 } 2783 2784 for (auto& state : mCameraStates) { 2785 String8 cameraId = state.first; 2786 2787 dprintf(fd, "== Camera device %s dynamic info: ==\n", cameraId.string()); 2788 2789 CameraParameters p = state.second->getShimParams(); 2790 if (!p.isEmpty()) { 2791 dprintf(fd, " Camera1 API shim is using parameters:\n "); 2792 p.dump(fd, args); 2793 } 2794 2795 auto clientDescriptor = mActiveClientManager.get(cameraId); 2796 if (clientDescriptor == nullptr) { 2797 dprintf(fd, " Device %s is closed, no client instance\n", 2798 cameraId.string()); 2799 continue; 2800 } 2801 dprintf(fd, " Device %s is open. Client instance dump:\n", 2802 cameraId.string()); 2803 dprintf(fd, " Client priority score: %d state: %d\n", 2804 clientDescriptor->getPriority().getScore(), 2805 clientDescriptor->getPriority().getState()); 2806 dprintf(fd, " Client PID: %d\n", clientDescriptor->getOwnerId()); 2807 2808 auto client = clientDescriptor->getValue(); 2809 dprintf(fd, " Client package: %s\n", 2810 String8(client->getPackageName()).string()); 2811 2812 client->dumpClient(fd, args); 2813 2814 if (mModule != nullptr) { 2815 dprintf(fd, "== Camera HAL device %s static information: ==\n", cameraId.string()); 2816 2817 camera_info info; 2818 status_t rc = mModule->getCameraInfo(cameraIdToInt(cameraId), &info); 2819 int deviceVersion = -1; 2820 if (rc != OK) { 2821 dprintf(fd, " Error reading static information!\n"); 2822 } else { 2823 dprintf(fd, " Facing: %s\n", 2824 info.facing == CAMERA_FACING_BACK ? "BACK" : 2825 info.facing == CAMERA_FACING_FRONT ? "FRONT" : "EXTERNAL"); 2826 dprintf(fd, " Orientation: %d\n", info.orientation); 2827 2828 if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0) { 2829 deviceVersion = CAMERA_DEVICE_API_VERSION_1_0; 2830 } else { 2831 deviceVersion = info.device_version; 2832 } 2833 } 2834 2835 auto conflicting = state.second->getConflicting(); 2836 dprintf(fd, " Resource Cost: %d\n", state.second->getCost()); 2837 dprintf(fd, " Conflicting Devices:"); 2838 for (auto& id : conflicting) { 2839 dprintf(fd, " %s", id.string()); 2840 } 2841 if (conflicting.size() == 0) { 2842 dprintf(fd, " NONE"); 2843 } 2844 dprintf(fd, "\n"); 2845 2846 dprintf(fd, " Device version: %#x\n", deviceVersion); 2847 if (deviceVersion >= CAMERA_DEVICE_API_VERSION_3_0) { 2848 dprintf(fd, " Device static metadata:\n"); 2849 dump_indented_camera_metadata(info.static_camera_characteristics, 2850 fd, /*verbosity*/2, /*indentation*/4); 2851 } 2852 } 2853 2854 } 2855 2856 if (stateLocked) mCameraStatesLock.unlock(); 2857 2858 if (locked) mServiceLock.unlock(); 2859 2860 if (mModule == nullptr) { 2861 mCameraProviderManager->dump(fd, args); 2862 } else { 2863 dprintf(fd, "\n== Camera Module HAL static info: ==\n"); 2864 dprintf(fd, "Camera module HAL API version: 0x%x\n", mModule->getHalApiVersion()); 2865 dprintf(fd, "Camera module API version: 0x%x\n", mModule->getModuleApiVersion()); 2866 dprintf(fd, "Camera module name: %s\n", mModule->getModuleName()); 2867 dprintf(fd, "Camera module author: %s\n", mModule->getModuleAuthor()); 2868 } 2869 2870 dprintf(fd, "\n== Vendor tags: ==\n\n"); 2871 2872 sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor(); 2873 if (desc == NULL) { 2874 dprintf(fd, "No vendor tags.\n"); 2875 } else { 2876 desc->dump(fd, /*verbosity*/2, /*indentation*/2); 2877 } 2878 2879 // Dump camera traces if there were any 2880 dprintf(fd, "\n"); 2881 camera3::CameraTraces::dump(fd, args); 2882 2883 // Process dump arguments, if any 2884 int n = args.size(); 2885 String16 verboseOption("-v"); 2886 String16 unreachableOption("--unreachable"); 2887 for (int i = 0; i < n; i++) { 2888 if (args[i] == verboseOption) { 2889 // change logging level 2890 if (i + 1 >= n) continue; 2891 String8 levelStr(args[i+1]); 2892 int level = atoi(levelStr.string()); 2893 dprintf(fd, "\nSetting log level to %d.\n", level); 2894 setLogLevel(level); 2895 } else if (args[i] == unreachableOption) { 2896 // Dump memory analysis 2897 // TODO - should limit be an argument parameter? 2898 UnreachableMemoryInfo info; 2899 bool success = GetUnreachableMemory(info, /*limit*/ 10000); 2900 if (!success) { 2901 dprintf(fd, "\n== Unable to dump unreachable memory. " 2902 "Try disabling SELinux enforcement. ==\n"); 2903 } else { 2904 dprintf(fd, "\n== Dumping unreachable memory: ==\n"); 2905 std::string s = info.ToString(/*log_contents*/ true); 2906 write(fd, s.c_str(), s.size()); 2907 } 2908 } 2909 } 2910 return NO_ERROR; 2911} 2912 2913void CameraService::dumpEventLog(int fd) { 2914 dprintf(fd, "\n== Camera service events log (most recent at top): ==\n"); 2915 2916 Mutex::Autolock l(mLogLock); 2917 for (const auto& msg : mEventLog) { 2918 dprintf(fd, " %s\n", msg.string()); 2919 } 2920 2921 if (mEventLog.size() == DEFAULT_EVENT_LOG_LENGTH) { 2922 dprintf(fd, " ...\n"); 2923 } else if (mEventLog.size() == 0) { 2924 dprintf(fd, " [no events yet]\n"); 2925 } 2926 dprintf(fd, "\n"); 2927} 2928 2929void CameraService::handleTorchClientBinderDied(const wp<IBinder> &who) { 2930 Mutex::Autolock al(mTorchClientMapMutex); 2931 for (size_t i = 0; i < mTorchClientMap.size(); i++) { 2932 if (mTorchClientMap[i] == who) { 2933 // turn off the torch mode that was turned on by dead client 2934 String8 cameraId = mTorchClientMap.keyAt(i); 2935 status_t res = mFlashlight->setTorchMode(cameraId, false); 2936 if (res) { 2937 ALOGE("%s: torch client died but couldn't turn off torch: " 2938 "%s (%d)", __FUNCTION__, strerror(-res), res); 2939 return; 2940 } 2941 mTorchClientMap.removeItemsAt(i); 2942 break; 2943 } 2944 } 2945} 2946 2947/*virtual*/void CameraService::binderDied(const wp<IBinder> &who) { 2948 2949 /** 2950 * While tempting to promote the wp<IBinder> into a sp, it's actually not supported by the 2951 * binder driver 2952 */ 2953 2954 logClientDied(getCallingPid(), String8("Binder died unexpectedly")); 2955 2956 // check torch client 2957 handleTorchClientBinderDied(who); 2958 2959 // check camera device client 2960 if(!evictClientIdByRemote(who)) { 2961 ALOGV("%s: Java client's binder death already cleaned up (normal case)", __FUNCTION__); 2962 return; 2963 } 2964 2965 ALOGE("%s: Java client's binder died, removing it from the list of active clients", 2966 __FUNCTION__); 2967} 2968 2969void CameraService::updateStatus(StatusInternal status, const String8& cameraId) { 2970 updateStatus(status, cameraId, {}); 2971} 2972 2973void CameraService::updateStatus(StatusInternal status, const String8& cameraId, 2974 std::initializer_list<StatusInternal> rejectSourceStates) { 2975 // Do not lock mServiceLock here or can get into a deadlock from 2976 // connect() -> disconnect -> updateStatus 2977 2978 auto state = getCameraState(cameraId); 2979 2980 if (state == nullptr) { 2981 ALOGW("%s: Could not update the status for %s, no such device exists", __FUNCTION__, 2982 cameraId.string()); 2983 return; 2984 } 2985 2986 // Update the status for this camera state, then send the onStatusChangedCallbacks to each 2987 // of the listeners with both the mStatusStatus and mStatusListenerLock held 2988 state->updateStatus(status, cameraId, rejectSourceStates, [this] 2989 (const String8& cameraId, StatusInternal status) { 2990 2991 if (status != StatusInternal::ENUMERATING) { 2992 // Update torch status if it has a flash unit. 2993 Mutex::Autolock al(mTorchStatusMutex); 2994 TorchModeStatus torchStatus; 2995 if (getTorchStatusLocked(cameraId, &torchStatus) != 2996 NAME_NOT_FOUND) { 2997 TorchModeStatus newTorchStatus = 2998 status == StatusInternal::PRESENT ? 2999 TorchModeStatus::AVAILABLE_OFF : 3000 TorchModeStatus::NOT_AVAILABLE; 3001 if (torchStatus != newTorchStatus) { 3002 onTorchStatusChangedLocked(cameraId, newTorchStatus); 3003 } 3004 } 3005 } 3006 3007 Mutex::Autolock lock(mStatusListenerLock); 3008 3009 for (auto& listener : mListenerList) { 3010 listener->onStatusChanged(mapToInterface(status), String16(cameraId)); 3011 } 3012 }); 3013} 3014 3015template<class Func> 3016void CameraService::CameraState::updateStatus(StatusInternal status, 3017 const String8& cameraId, 3018 std::initializer_list<StatusInternal> rejectSourceStates, 3019 Func onStatusUpdatedLocked) { 3020 Mutex::Autolock lock(mStatusLock); 3021 StatusInternal oldStatus = mStatus; 3022 mStatus = status; 3023 3024 if (oldStatus == status) { 3025 return; 3026 } 3027 3028 ALOGV("%s: Status has changed for camera ID %s from %#x to %#x", __FUNCTION__, 3029 cameraId.string(), oldStatus, status); 3030 3031 if (oldStatus == StatusInternal::NOT_PRESENT && 3032 (status != StatusInternal::PRESENT && 3033 status != StatusInternal::ENUMERATING)) { 3034 3035 ALOGW("%s: From NOT_PRESENT can only transition into PRESENT or ENUMERATING", 3036 __FUNCTION__); 3037 mStatus = oldStatus; 3038 return; 3039 } 3040 3041 /** 3042 * Sometimes we want to conditionally do a transition. 3043 * For example if a client disconnects, we want to go to PRESENT 3044 * only if we weren't already in NOT_PRESENT or ENUMERATING. 3045 */ 3046 for (auto& rejectStatus : rejectSourceStates) { 3047 if (oldStatus == rejectStatus) { 3048 ALOGV("%s: Rejecting status transition for Camera ID %s, since the source " 3049 "state was was in one of the bad states.", __FUNCTION__, cameraId.string()); 3050 mStatus = oldStatus; 3051 return; 3052 } 3053 } 3054 3055 onStatusUpdatedLocked(cameraId, status); 3056} 3057 3058void CameraService::updateProxyDeviceState(ICameraServiceProxy::CameraState newState, 3059 const String8& cameraId) { 3060 sp<ICameraServiceProxy> proxyBinder = getCameraServiceProxy(); 3061 if (proxyBinder == nullptr) return; 3062 String16 id(cameraId); 3063 proxyBinder->notifyCameraState(id, newState); 3064} 3065 3066status_t CameraService::getTorchStatusLocked( 3067 const String8& cameraId, 3068 TorchModeStatus *status) const { 3069 if (!status) { 3070 return BAD_VALUE; 3071 } 3072 ssize_t index = mTorchStatusMap.indexOfKey(cameraId); 3073 if (index == NAME_NOT_FOUND) { 3074 // invalid camera ID or the camera doesn't have a flash unit 3075 return NAME_NOT_FOUND; 3076 } 3077 3078 *status = mTorchStatusMap.valueAt(index); 3079 return OK; 3080} 3081 3082status_t CameraService::setTorchStatusLocked(const String8& cameraId, 3083 TorchModeStatus status) { 3084 ssize_t index = mTorchStatusMap.indexOfKey(cameraId); 3085 if (index == NAME_NOT_FOUND) { 3086 return BAD_VALUE; 3087 } 3088 mTorchStatusMap.editValueAt(index) = status; 3089 3090 return OK; 3091} 3092 3093}; // namespace android 3094