CameraService.cpp revision 4afbdecf8c6dc5ad04f6fa6c8712ce2c56a00c47
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "CameraService" 18#define ATRACE_TAG ATRACE_TAG_CAMERA 19//#define LOG_NDEBUG 0 20 21#include <algorithm> 22#include <climits> 23#include <stdio.h> 24#include <cstring> 25#include <ctime> 26#include <string> 27#include <sys/types.h> 28#include <inttypes.h> 29#include <pthread.h> 30 31#include <android/hardware/ICamera.h> 32#include <android/hardware/ICameraClient.h> 33 34#include <binder/AppOpsManager.h> 35#include <binder/IPCThreadState.h> 36#include <binder/IServiceManager.h> 37#include <binder/MemoryBase.h> 38#include <binder/MemoryHeapBase.h> 39#include <binder/ProcessInfoService.h> 40#include <cutils/atomic.h> 41#include <cutils/properties.h> 42#include <gui/Surface.h> 43#include <hardware/hardware.h> 44#include <memunreachable/memunreachable.h> 45#include <media/AudioSystem.h> 46#include <media/IMediaHTTPService.h> 47#include <media/mediaplayer.h> 48#include <mediautils/BatteryNotifier.h> 49#include <utils/Errors.h> 50#include <utils/Log.h> 51#include <utils/String16.h> 52#include <utils/Trace.h> 53#include <private/android_filesystem_config.h> 54#include <system/camera_vendor_tags.h> 55#include <system/camera_metadata.h> 56#include <system/camera.h> 57 58#include "CameraService.h" 59#include "api1/CameraClient.h" 60#include "api1/Camera2Client.h" 61#include "api2/CameraDeviceClient.h" 62#include "utils/CameraTraces.h" 63 64namespace { 65 const char* kPermissionServiceName = "permission"; 66}; // namespace anonymous 67 68namespace android { 69 70using binder::Status; 71using namespace hardware; 72 73// ---------------------------------------------------------------------------- 74// Logging support -- this is for debugging only 75// Use "adb shell dumpsys media.camera -v 1" to change it. 76volatile int32_t gLogLevel = 0; 77 78#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__); 79#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__); 80 81static void setLogLevel(int level) { 82 android_atomic_write(level, &gLogLevel); 83} 84 85// Convenience methods for constructing binder::Status objects for error returns 86 87#define STATUS_ERROR(errorCode, errorString) \ 88 binder::Status::fromServiceSpecificError(errorCode, \ 89 String8::format("%s:%d: %s", __FUNCTION__, __LINE__, errorString)) 90 91#define STATUS_ERROR_FMT(errorCode, errorString, ...) \ 92 binder::Status::fromServiceSpecificError(errorCode, \ 93 String8::format("%s:%d: " errorString, __FUNCTION__, __LINE__, \ 94 __VA_ARGS__)) 95 96// ---------------------------------------------------------------------------- 97 98extern "C" { 99static void camera_device_status_change( 100 const struct camera_module_callbacks* callbacks, 101 int camera_id, 102 int new_status) { 103 sp<CameraService> cs = const_cast<CameraService*>( 104 static_cast<const CameraService*>(callbacks)); 105 106 cs->onDeviceStatusChanged(static_cast<camera_device_status_t>(camera_id), 107 static_cast<camera_device_status_t>(new_status)); 108} 109 110static void torch_mode_status_change( 111 const struct camera_module_callbacks* callbacks, 112 const char* camera_id, 113 int new_status) { 114 if (!callbacks || !camera_id) { 115 ALOGE("%s invalid parameters. callbacks %p, camera_id %p", __FUNCTION__, 116 callbacks, camera_id); 117 } 118 sp<CameraService> cs = const_cast<CameraService*>( 119 static_cast<const CameraService*>(callbacks)); 120 121 int32_t status; 122 switch (new_status) { 123 case TORCH_MODE_STATUS_NOT_AVAILABLE: 124 status = ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE; 125 break; 126 case TORCH_MODE_STATUS_AVAILABLE_OFF: 127 status = ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF; 128 break; 129 case TORCH_MODE_STATUS_AVAILABLE_ON: 130 status = ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON; 131 break; 132 default: 133 ALOGE("Unknown torch status %d", new_status); 134 return; 135 } 136 137 cs->onTorchStatusChanged( 138 String8(camera_id), 139 status); 140} 141} // extern "C" 142 143// ---------------------------------------------------------------------------- 144 145// This is ugly and only safe if we never re-create the CameraService, but 146// should be ok for now. 147static CameraService *gCameraService; 148 149CameraService::CameraService() : 150 mEventLog(DEFAULT_EVENT_LOG_LENGTH), 151 mNumberOfCameras(0), mNumberOfNormalCameras(0), 152 mSoundRef(0), mModule(nullptr) { 153 ALOGI("CameraService started (pid=%d)", getpid()); 154 gCameraService = this; 155 156 this->camera_device_status_change = android::camera_device_status_change; 157 this->torch_mode_status_change = android::torch_mode_status_change; 158 159 mServiceLockWrapper = std::make_shared<WaitableMutexWrapper>(&mServiceLock); 160} 161 162void CameraService::onFirstRef() 163{ 164 ALOGI("CameraService process starting"); 165 166 BnCameraService::onFirstRef(); 167 168 // Update battery life tracking if service is restarting 169 BatteryNotifier& notifier(BatteryNotifier::getInstance()); 170 notifier.noteResetCamera(); 171 notifier.noteResetFlashlight(); 172 173 camera_module_t *rawModule; 174 int err = hw_get_module(CAMERA_HARDWARE_MODULE_ID, 175 (const hw_module_t **)&rawModule); 176 if (err < 0) { 177 ALOGE("Could not load camera HAL module: %d (%s)", err, strerror(-err)); 178 logServiceError("Could not load camera HAL module", err); 179 return; 180 } 181 182 mModule = new CameraModule(rawModule); 183 err = mModule->init(); 184 if (err != OK) { 185 ALOGE("Could not initialize camera HAL module: %d (%s)", err, 186 strerror(-err)); 187 logServiceError("Could not initialize camera HAL module", err); 188 189 delete mModule; 190 mModule = nullptr; 191 return; 192 } 193 ALOGI("Loaded \"%s\" camera module", mModule->getModuleName()); 194 195 mNumberOfCameras = mModule->getNumberOfCameras(); 196 mNumberOfNormalCameras = mNumberOfCameras; 197 198 // Setup vendor tags before we call get_camera_info the first time 199 // because HAL might need to setup static vendor keys in get_camera_info 200 VendorTagDescriptor::clearGlobalVendorTagDescriptor(); 201 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_2) { 202 setUpVendorTags(); 203 } 204 205 mFlashlight = new CameraFlashlight(*mModule, *this); 206 status_t res = mFlashlight->findFlashUnits(); 207 if (res) { 208 // impossible because we haven't open any camera devices. 209 ALOGE("Failed to find flash units."); 210 } 211 212 int latestStrangeCameraId = INT_MAX; 213 for (int i = 0; i < mNumberOfCameras; i++) { 214 String8 cameraId = String8::format("%d", i); 215 216 // Get camera info 217 218 struct camera_info info; 219 bool haveInfo = true; 220 status_t rc = mModule->getCameraInfo(i, &info); 221 if (rc != NO_ERROR) { 222 ALOGE("%s: Received error loading camera info for device %d, cost and" 223 " conflicting devices fields set to defaults for this device.", 224 __FUNCTION__, i); 225 haveInfo = false; 226 } 227 228 // Check for backwards-compatibility support 229 if (haveInfo) { 230 if (checkCameraCapabilities(i, info, &latestStrangeCameraId) != OK) { 231 delete mModule; 232 mModule = nullptr; 233 return; 234 } 235 } 236 237 // Defaults to use for cost and conflicting devices 238 int cost = 100; 239 char** conflicting_devices = nullptr; 240 size_t conflicting_devices_length = 0; 241 242 // If using post-2.4 module version, query the cost + conflicting devices from the HAL 243 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_4 && haveInfo) { 244 cost = info.resource_cost; 245 conflicting_devices = info.conflicting_devices; 246 conflicting_devices_length = info.conflicting_devices_length; 247 } 248 249 std::set<String8> conflicting; 250 for (size_t i = 0; i < conflicting_devices_length; i++) { 251 conflicting.emplace(String8(conflicting_devices[i])); 252 } 253 254 // Initialize state for each camera device 255 { 256 Mutex::Autolock lock(mCameraStatesLock); 257 mCameraStates.emplace(cameraId, std::make_shared<CameraState>(cameraId, cost, 258 conflicting)); 259 } 260 261 if (mFlashlight->hasFlashUnit(cameraId)) { 262 mTorchStatusMap.add(cameraId, 263 ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF); 264 } 265 } 266 267 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_1) { 268 mModule->setCallbacks(this); 269 } 270 271 CameraService::pingCameraServiceProxy(); 272} 273 274sp<ICameraServiceProxy> CameraService::getCameraServiceProxy() { 275 sp<IServiceManager> sm = defaultServiceManager(); 276 sp<IBinder> binder = sm->getService(String16("media.camera.proxy")); 277 if (binder == nullptr) { 278 return nullptr; 279 } 280 sp<ICameraServiceProxy> proxyBinder = interface_cast<ICameraServiceProxy>(binder); 281 return proxyBinder; 282} 283 284void CameraService::pingCameraServiceProxy() { 285 sp<ICameraServiceProxy> proxyBinder = getCameraServiceProxy(); 286 if (proxyBinder == nullptr) return; 287 proxyBinder->pingForUserUpdate(); 288} 289 290CameraService::~CameraService() { 291 if (mModule) { 292 delete mModule; 293 mModule = nullptr; 294 } 295 VendorTagDescriptor::clearGlobalVendorTagDescriptor(); 296 gCameraService = nullptr; 297} 298 299void CameraService::onDeviceStatusChanged(camera_device_status_t cameraId, 300 camera_device_status_t newStatus) { 301 ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__, 302 cameraId, newStatus); 303 304 String8 id = String8::format("%d", cameraId); 305 std::shared_ptr<CameraState> state = getCameraState(id); 306 307 if (state == nullptr) { 308 ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId); 309 return; 310 } 311 312 int32_t oldStatus = state->getStatus(); 313 314 if (oldStatus == static_cast<int32_t>(newStatus)) { 315 ALOGE("%s: State transition to the same status %#x not allowed", __FUNCTION__, newStatus); 316 return; 317 } 318 319 if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) { 320 logDeviceRemoved(id, String8::format("Device status changed from %d to %d", oldStatus, 321 newStatus)); 322 sp<BasicClient> clientToDisconnect; 323 { 324 // Don't do this in updateStatus to avoid deadlock over mServiceLock 325 Mutex::Autolock lock(mServiceLock); 326 327 // Set the device status to NOT_PRESENT, clients will no longer be able to connect 328 // to this device until the status changes 329 updateStatus(ICameraServiceListener::STATUS_NOT_PRESENT, id); 330 331 // Remove cached shim parameters 332 state->setShimParams(CameraParameters()); 333 334 // Remove the client from the list of active clients 335 clientToDisconnect = removeClientLocked(id); 336 337 // Notify the client of disconnection 338 clientToDisconnect->notifyError( 339 hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED, 340 CaptureResultExtras{}); 341 } 342 343 ALOGI("%s: Client for camera ID %s evicted due to device status change from HAL", 344 __FUNCTION__, id.string()); 345 346 // Disconnect client 347 if (clientToDisconnect.get() != nullptr) { 348 // Ensure not in binder RPC so client disconnect PID checks work correctly 349 LOG_ALWAYS_FATAL_IF(getCallingPid() != getpid(), 350 "onDeviceStatusChanged must be called from the camera service process!"); 351 clientToDisconnect->disconnect(); 352 } 353 354 } else { 355 if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT) { 356 logDeviceAdded(id, String8::format("Device status changed from %d to %d", oldStatus, 357 newStatus)); 358 } 359 updateStatus(static_cast<int32_t>(newStatus), id); 360 } 361 362} 363 364void CameraService::onTorchStatusChanged(const String8& cameraId, 365 int32_t newStatus) { 366 Mutex::Autolock al(mTorchStatusMutex); 367 onTorchStatusChangedLocked(cameraId, newStatus); 368} 369 370void CameraService::onTorchStatusChangedLocked(const String8& cameraId, 371 int32_t newStatus) { 372 ALOGI("%s: Torch status changed for cameraId=%s, newStatus=%d", 373 __FUNCTION__, cameraId.string(), newStatus); 374 375 int32_t status; 376 status_t res = getTorchStatusLocked(cameraId, &status); 377 if (res) { 378 ALOGE("%s: cannot get torch status of camera %s: %s (%d)", 379 __FUNCTION__, cameraId.string(), strerror(-res), res); 380 return; 381 } 382 if (status == newStatus) { 383 return; 384 } 385 386 res = setTorchStatusLocked(cameraId, newStatus); 387 if (res) { 388 ALOGE("%s: Failed to set the torch status to %d: %s (%d)", __FUNCTION__, 389 (uint32_t)newStatus, strerror(-res), res); 390 return; 391 } 392 393 { 394 // Update battery life logging for flashlight 395 Mutex::Autolock al(mTorchUidMapMutex); 396 auto iter = mTorchUidMap.find(cameraId); 397 if (iter != mTorchUidMap.end()) { 398 int oldUid = iter->second.second; 399 int newUid = iter->second.first; 400 BatteryNotifier& notifier(BatteryNotifier::getInstance()); 401 if (oldUid != newUid) { 402 // If the UID has changed, log the status and update current UID in mTorchUidMap 403 if (status == ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON) { 404 notifier.noteFlashlightOff(cameraId, oldUid); 405 } 406 if (newStatus == ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON) { 407 notifier.noteFlashlightOn(cameraId, newUid); 408 } 409 iter->second.second = newUid; 410 } else { 411 // If the UID has not changed, log the status 412 if (newStatus == ICameraServiceListener::TORCH_STATUS_AVAILABLE_ON) { 413 notifier.noteFlashlightOn(cameraId, oldUid); 414 } else { 415 notifier.noteFlashlightOff(cameraId, oldUid); 416 } 417 } 418 } 419 } 420 421 { 422 Mutex::Autolock lock(mStatusListenerLock); 423 for (auto& i : mListenerList) { 424 i->onTorchStatusChanged(newStatus, String16{cameraId}); 425 } 426 } 427} 428 429Status CameraService::getNumberOfCameras(int32_t type, int32_t* numCameras) { 430 ATRACE_CALL(); 431 switch (type) { 432 case CAMERA_TYPE_BACKWARD_COMPATIBLE: 433 *numCameras = mNumberOfNormalCameras; 434 break; 435 case CAMERA_TYPE_ALL: 436 *numCameras = mNumberOfCameras; 437 break; 438 default: 439 ALOGW("%s: Unknown camera type %d", 440 __FUNCTION__, type); 441 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 442 "Unknown camera type %d", type); 443 } 444 return Status::ok(); 445} 446 447Status CameraService::getCameraInfo(int cameraId, 448 CameraInfo* cameraInfo) { 449 ATRACE_CALL(); 450 if (!mModule) { 451 return STATUS_ERROR(ERROR_DISCONNECTED, 452 "Camera subsystem is not available"); 453 } 454 455 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 456 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, 457 "CameraId is not valid"); 458 } 459 460 struct camera_info info; 461 Status rc = filterGetInfoErrorCode( 462 mModule->getCameraInfo(cameraId, &info)); 463 464 if (rc.isOk()) { 465 cameraInfo->facing = info.facing; 466 cameraInfo->orientation = info.orientation; 467 // CameraInfo is for android.hardware.Camera which does not 468 // support external camera facing. The closest approximation would be 469 // front camera. 470 if (cameraInfo->orientation == CAMERA_FACING_EXTERNAL) { 471 cameraInfo->orientation = CAMERA_FACING_FRONT; 472 } 473 } 474 return rc; 475} 476 477int CameraService::cameraIdToInt(const String8& cameraId) { 478 errno = 0; 479 size_t pos = 0; 480 int ret = stoi(std::string{cameraId.string()}, &pos); 481 if (errno != 0 || pos != cameraId.size()) { 482 return -1; 483 } 484 return ret; 485} 486 487Status CameraService::generateShimMetadata(int cameraId, /*out*/CameraMetadata* cameraInfo) { 488 ATRACE_CALL(); 489 490 Status ret = Status::ok(); 491 492 struct CameraInfo info; 493 if (!(ret = getCameraInfo(cameraId, &info)).isOk()) { 494 return ret; 495 } 496 497 CameraMetadata shimInfo; 498 int32_t orientation = static_cast<int32_t>(info.orientation); 499 status_t rc; 500 if ((rc = shimInfo.update(ANDROID_SENSOR_ORIENTATION, &orientation, 1)) != OK) { 501 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 502 "Error updating metadata: %d (%s)", rc, strerror(-rc)); 503 } 504 505 uint8_t facing = (info.facing == CAMERA_FACING_FRONT) ? 506 ANDROID_LENS_FACING_FRONT : ANDROID_LENS_FACING_BACK; 507 if ((rc = shimInfo.update(ANDROID_LENS_FACING, &facing, 1)) != OK) { 508 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 509 "Error updating metadata: %d (%s)", rc, strerror(-rc)); 510 } 511 512 CameraParameters shimParams; 513 if (!(ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)).isOk()) { 514 // Error logged by callee 515 return ret; 516 } 517 518 Vector<Size> sizes; 519 Vector<Size> jpegSizes; 520 Vector<int32_t> formats; 521 { 522 shimParams.getSupportedPreviewSizes(/*out*/sizes); 523 shimParams.getSupportedPreviewFormats(/*out*/formats); 524 shimParams.getSupportedPictureSizes(/*out*/jpegSizes); 525 } 526 527 // Always include IMPLEMENTATION_DEFINED 528 formats.add(HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED); 529 530 const size_t INTS_PER_CONFIG = 4; 531 532 // Build available stream configurations metadata 533 size_t streamConfigSize = (sizes.size() * formats.size() + jpegSizes.size()) * INTS_PER_CONFIG; 534 535 Vector<int32_t> streamConfigs; 536 streamConfigs.setCapacity(streamConfigSize); 537 538 for (size_t i = 0; i < formats.size(); ++i) { 539 for (size_t j = 0; j < sizes.size(); ++j) { 540 streamConfigs.add(formats[i]); 541 streamConfigs.add(sizes[j].width); 542 streamConfigs.add(sizes[j].height); 543 streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT); 544 } 545 } 546 547 for (size_t i = 0; i < jpegSizes.size(); ++i) { 548 streamConfigs.add(HAL_PIXEL_FORMAT_BLOB); 549 streamConfigs.add(jpegSizes[i].width); 550 streamConfigs.add(jpegSizes[i].height); 551 streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT); 552 } 553 554 if ((rc = shimInfo.update(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS, 555 streamConfigs.array(), streamConfigSize)) != OK) { 556 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 557 "Error updating metadata: %d (%s)", rc, strerror(-rc)); 558 } 559 560 int64_t fakeMinFrames[0]; 561 // TODO: Fixme, don't fake min frame durations. 562 if ((rc = shimInfo.update(ANDROID_SCALER_AVAILABLE_MIN_FRAME_DURATIONS, 563 fakeMinFrames, 0)) != OK) { 564 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 565 "Error updating metadata: %d (%s)", rc, strerror(-rc)); 566 } 567 568 int64_t fakeStalls[0]; 569 // TODO: Fixme, don't fake stall durations. 570 if ((rc = shimInfo.update(ANDROID_SCALER_AVAILABLE_STALL_DURATIONS, 571 fakeStalls, 0)) != OK) { 572 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 573 "Error updating metadata: %d (%s)", rc, strerror(-rc)); 574 } 575 576 *cameraInfo = shimInfo; 577 return ret; 578} 579 580Status CameraService::getCameraCharacteristics(int cameraId, 581 CameraMetadata* cameraInfo) { 582 ATRACE_CALL(); 583 if (!cameraInfo) { 584 ALOGE("%s: cameraInfo is NULL", __FUNCTION__); 585 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "cameraInfo is NULL"); 586 } 587 588 if (!mModule) { 589 ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__); 590 return STATUS_ERROR(ERROR_DISCONNECTED, 591 "Camera subsystem is not available");; 592 } 593 594 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 595 ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId); 596 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 597 "Invalid camera id: %d", cameraId); 598 } 599 600 int facing; 601 Status ret; 602 if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0 || 603 getDeviceVersion(cameraId, &facing) < CAMERA_DEVICE_API_VERSION_3_0) { 604 /** 605 * Backwards compatibility mode for old HALs: 606 * - Convert CameraInfo into static CameraMetadata properties. 607 * - Retrieve cached CameraParameters for this camera. If none exist, 608 * attempt to open CameraClient and retrieve the CameraParameters. 609 * - Convert cached CameraParameters into static CameraMetadata 610 * properties. 611 */ 612 ALOGI("%s: Switching to HAL1 shim implementation...", __FUNCTION__); 613 614 ret = generateShimMetadata(cameraId, cameraInfo); 615 } else { 616 /** 617 * Normal HAL 2.1+ codepath. 618 */ 619 struct camera_info info; 620 ret = filterGetInfoErrorCode(mModule->getCameraInfo(cameraId, &info)); 621 if (ret.isOk()) { 622 *cameraInfo = info.static_camera_characteristics; 623 } 624 } 625 626 return ret; 627} 628 629int CameraService::getCallingPid() { 630 return IPCThreadState::self()->getCallingPid(); 631} 632 633int CameraService::getCallingUid() { 634 return IPCThreadState::self()->getCallingUid(); 635} 636 637String8 CameraService::getFormattedCurrentTime() { 638 time_t now = time(nullptr); 639 char formattedTime[64]; 640 strftime(formattedTime, sizeof(formattedTime), "%m-%d %H:%M:%S", localtime(&now)); 641 return String8(formattedTime); 642} 643 644int CameraService::getCameraPriorityFromProcState(int procState) { 645 // Find the priority for the camera usage based on the process state. Higher priority clients 646 // win for evictions. 647 if (procState < 0) { 648 ALOGE("%s: Received invalid process state %d from ActivityManagerService!", __FUNCTION__, 649 procState); 650 return -1; 651 } 652 // Treat sleeping TOP processes the same as regular TOP processes, for 653 // access priority. This is important for lock-screen camera launch scenarios 654 if (procState == PROCESS_STATE_TOP_SLEEPING) { 655 procState = PROCESS_STATE_TOP; 656 } 657 return INT_MAX - procState; 658} 659 660Status CameraService::getCameraVendorTagDescriptor( 661 /*out*/ 662 hardware::camera2::params::VendorTagDescriptor* desc) { 663 ATRACE_CALL(); 664 if (!mModule) { 665 ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__); 666 return STATUS_ERROR(ERROR_DISCONNECTED, "Camera subsystem not available"); 667 } 668 sp<VendorTagDescriptor> globalDescriptor = VendorTagDescriptor::getGlobalVendorTagDescriptor(); 669 if (globalDescriptor != nullptr) { 670 *desc = *(globalDescriptor.get()); 671 } 672 return Status::ok(); 673} 674 675int CameraService::getDeviceVersion(int cameraId, int* facing) { 676 ATRACE_CALL(); 677 struct camera_info info; 678 if (mModule->getCameraInfo(cameraId, &info) != OK) { 679 return -1; 680 } 681 682 int deviceVersion; 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 } 692 693 return deviceVersion; 694} 695 696Status CameraService::filterGetInfoErrorCode(status_t err) { 697 switch(err) { 698 case NO_ERROR: 699 return Status::ok(); 700 case -EINVAL: 701 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, 702 "CameraId is not valid for HAL module"); 703 case -ENODEV: 704 return STATUS_ERROR(ERROR_DISCONNECTED, 705 "Camera device not available"); 706 default: 707 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 708 "Camera HAL encountered error %d: %s", 709 err, strerror(-err)); 710 } 711} 712 713bool CameraService::setUpVendorTags() { 714 ATRACE_CALL(); 715 vendor_tag_ops_t vOps = vendor_tag_ops_t(); 716 717 // Check if vendor operations have been implemented 718 if (!mModule->isVendorTagDefined()) { 719 ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__); 720 return false; 721 } 722 723 mModule->getVendorTagOps(&vOps); 724 725 // Ensure all vendor operations are present 726 if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL || 727 vOps.get_section_name == NULL || vOps.get_tag_name == NULL || 728 vOps.get_tag_type == NULL) { 729 ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions." 730 , __FUNCTION__); 731 return false; 732 } 733 734 // Read all vendor tag definitions into a descriptor 735 sp<VendorTagDescriptor> desc; 736 status_t res; 737 if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc)) 738 != OK) { 739 ALOGE("%s: Could not generate descriptor from vendor tag operations," 740 "received error %s (%d). Camera clients will not be able to use" 741 "vendor tags", __FUNCTION__, strerror(res), res); 742 return false; 743 } 744 745 // Set the global descriptor to use with camera metadata 746 VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc); 747 return true; 748} 749 750Status CameraService::makeClient(const sp<CameraService>& cameraService, 751 const sp<IInterface>& cameraCb, const String16& packageName, int cameraId, 752 int facing, int clientPid, uid_t clientUid, int servicePid, bool legacyMode, 753 int halVersion, int deviceVersion, apiLevel effectiveApiLevel, 754 /*out*/sp<BasicClient>* client) { 755 756 if (halVersion < 0 || halVersion == deviceVersion) { 757 // Default path: HAL version is unspecified by caller, create CameraClient 758 // based on device version reported by the HAL. 759 switch(deviceVersion) { 760 case CAMERA_DEVICE_API_VERSION_1_0: 761 if (effectiveApiLevel == API_1) { // Camera1 API route 762 sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get()); 763 *client = new CameraClient(cameraService, tmp, packageName, cameraId, facing, 764 clientPid, clientUid, getpid(), legacyMode); 765 } else { // Camera2 API route 766 ALOGW("Camera using old HAL version: %d", deviceVersion); 767 return STATUS_ERROR_FMT(ERROR_DEPRECATED_HAL, 768 "Camera device \"%d\" HAL version %d does not support camera2 API", 769 cameraId, deviceVersion); 770 } 771 break; 772 case CAMERA_DEVICE_API_VERSION_3_0: 773 case CAMERA_DEVICE_API_VERSION_3_1: 774 case CAMERA_DEVICE_API_VERSION_3_2: 775 case CAMERA_DEVICE_API_VERSION_3_3: 776 case CAMERA_DEVICE_API_VERSION_3_4: 777 if (effectiveApiLevel == API_1) { // Camera1 API route 778 sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get()); 779 *client = new Camera2Client(cameraService, tmp, packageName, cameraId, facing, 780 clientPid, clientUid, servicePid, legacyMode); 781 } else { // Camera2 API route 782 sp<hardware::camera2::ICameraDeviceCallbacks> tmp = 783 static_cast<hardware::camera2::ICameraDeviceCallbacks*>(cameraCb.get()); 784 *client = new CameraDeviceClient(cameraService, tmp, packageName, cameraId, 785 facing, clientPid, clientUid, servicePid); 786 } 787 break; 788 default: 789 // Should not be reachable 790 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 791 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 792 "Camera device \"%d\" has unknown HAL version %d", 793 cameraId, deviceVersion); 794 } 795 } else { 796 // A particular HAL version is requested by caller. Create CameraClient 797 // based on the requested HAL version. 798 if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 && 799 halVersion == CAMERA_DEVICE_API_VERSION_1_0) { 800 // Only support higher HAL version device opened as HAL1.0 device. 801 sp<ICameraClient> tmp = static_cast<ICameraClient*>(cameraCb.get()); 802 *client = new CameraClient(cameraService, tmp, packageName, cameraId, facing, 803 clientPid, clientUid, servicePid, legacyMode); 804 } else { 805 // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet. 806 ALOGE("Invalid camera HAL version %x: HAL %x device can only be" 807 " opened as HAL %x device", halVersion, deviceVersion, 808 CAMERA_DEVICE_API_VERSION_1_0); 809 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 810 "Camera device \"%d\" (HAL version %d) cannot be opened as HAL version %d", 811 cameraId, deviceVersion, halVersion); 812 } 813 } 814 return Status::ok(); 815} 816 817String8 CameraService::toString(std::set<userid_t> intSet) { 818 String8 s(""); 819 bool first = true; 820 for (userid_t i : intSet) { 821 if (first) { 822 s.appendFormat("%d", i); 823 first = false; 824 } else { 825 s.appendFormat(", %d", i); 826 } 827 } 828 return s; 829} 830 831Status CameraService::initializeShimMetadata(int cameraId) { 832 int uid = getCallingUid(); 833 834 String16 internalPackageName("cameraserver"); 835 String8 id = String8::format("%d", cameraId); 836 Status ret = Status::ok(); 837 sp<Client> tmp = nullptr; 838 if (!(ret = connectHelper<ICameraClient,Client>( 839 sp<ICameraClient>{nullptr}, id, static_cast<int>(CAMERA_HAL_API_VERSION_UNSPECIFIED), 840 internalPackageName, uid, USE_CALLING_PID, 841 API_1, /*legacyMode*/ false, /*shimUpdateOnly*/ true, 842 /*out*/ tmp) 843 ).isOk()) { 844 ALOGE("%s: Error initializing shim metadata: %s", __FUNCTION__, ret.toString8().string()); 845 } 846 return ret; 847} 848 849Status CameraService::getLegacyParametersLazy(int cameraId, 850 /*out*/ 851 CameraParameters* parameters) { 852 853 ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId); 854 855 Status ret = Status::ok(); 856 857 if (parameters == NULL) { 858 ALOGE("%s: parameters must not be null", __FUNCTION__); 859 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Parameters must not be null"); 860 } 861 862 String8 id = String8::format("%d", cameraId); 863 864 // Check if we already have parameters 865 { 866 // Scope for service lock 867 Mutex::Autolock lock(mServiceLock); 868 auto cameraState = getCameraState(id); 869 if (cameraState == nullptr) { 870 ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string()); 871 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 872 "Invalid camera ID: %s", id.string()); 873 } 874 CameraParameters p = cameraState->getShimParams(); 875 if (!p.isEmpty()) { 876 *parameters = p; 877 return ret; 878 } 879 } 880 881 int64_t token = IPCThreadState::self()->clearCallingIdentity(); 882 ret = initializeShimMetadata(cameraId); 883 IPCThreadState::self()->restoreCallingIdentity(token); 884 if (!ret.isOk()) { 885 // Error already logged by callee 886 return ret; 887 } 888 889 // Check for parameters again 890 { 891 // Scope for service lock 892 Mutex::Autolock lock(mServiceLock); 893 auto cameraState = getCameraState(id); 894 if (cameraState == nullptr) { 895 ALOGE("%s: Invalid camera ID: %s", __FUNCTION__, id.string()); 896 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 897 "Invalid camera ID: %s", id.string()); 898 } 899 CameraParameters p = cameraState->getShimParams(); 900 if (!p.isEmpty()) { 901 *parameters = p; 902 return ret; 903 } 904 } 905 906 ALOGE("%s: Parameters were not initialized, or were empty. Device may not be present.", 907 __FUNCTION__); 908 return STATUS_ERROR(ERROR_INVALID_OPERATION, "Unable to initialize legacy parameters"); 909} 910 911// Can camera service trust the caller based on the calling UID? 912static bool isTrustedCallingUid(uid_t uid) { 913 switch (uid) { 914 case AID_MEDIA: // mediaserver 915 case AID_CAMERASERVER: // cameraserver 916 return true; 917 default: 918 return false; 919 } 920} 921 922Status CameraService::validateConnectLocked(const String8& cameraId, 923 const String8& clientName8, /*inout*/int& clientUid, /*inout*/int& clientPid, 924 /*out*/int& originalClientPid) const { 925 926 int callingPid = getCallingPid(); 927 int callingUid = getCallingUid(); 928 929 // Check if we can trust clientUid 930 if (clientUid == USE_CALLING_UID) { 931 clientUid = callingUid; 932 } else if (!isTrustedCallingUid(callingUid)) { 933 ALOGE("CameraService::connect X (calling PID %d, calling UID %d) rejected " 934 "(don't trust clientUid %d)", callingPid, callingUid, clientUid); 935 return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, 936 "Untrusted caller (calling PID %d, UID %d) trying to " 937 "forward camera access to camera %s for client %s (PID %d, UID %d)", 938 callingPid, callingUid, cameraId.string(), 939 clientName8.string(), clientUid, clientPid); 940 } 941 942 // Check if we can trust clientPid 943 if (clientPid == USE_CALLING_PID) { 944 clientPid = callingPid; 945 } else if (!isTrustedCallingUid(callingUid)) { 946 ALOGE("CameraService::connect X (calling PID %d, calling UID %d) rejected " 947 "(don't trust clientPid %d)", callingPid, callingUid, clientPid); 948 return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, 949 "Untrusted caller (calling PID %d, UID %d) trying to " 950 "forward camera access to camera %s for client %s (PID %d, UID %d)", 951 callingPid, callingUid, cameraId.string(), 952 clientName8.string(), clientUid, clientPid); 953 } 954 955 // If it's not calling from cameraserver, check the permission. 956 if (callingPid != getpid() && 957 !checkPermission(String16("android.permission.CAMERA"), clientPid, clientUid)) { 958 ALOGE("Permission Denial: can't use the camera pid=%d, uid=%d", clientPid, clientUid); 959 return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, 960 "Caller \"%s\" (PID %d, UID %d) cannot open camera \"%s\" without camera permission", 961 clientName8.string(), clientUid, clientPid, cameraId.string()); 962 } 963 964 // Only use passed in clientPid to check permission. Use calling PID as the client PID that's 965 // connected to camera service directly. 966 originalClientPid = clientPid; 967 clientPid = callingPid; 968 969 if (!mModule) { 970 ALOGE("CameraService::connect X (PID %d) rejected (camera HAL module not loaded)", 971 callingPid); 972 return STATUS_ERROR_FMT(ERROR_DISCONNECTED, 973 "No camera HAL module available to open camera device \"%s\"", cameraId.string()); 974 } 975 976 if (getCameraState(cameraId) == nullptr) { 977 ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid, 978 cameraId.string()); 979 return STATUS_ERROR_FMT(ERROR_DISCONNECTED, 980 "No camera device with ID \"%s\" available", cameraId.string()); 981 } 982 983 userid_t clientUserId = multiuser_get_user_id(clientUid); 984 985 // Only allow clients who are being used by the current foreground device user, unless calling 986 // from our own process. 987 if (callingPid != getpid() && (mAllowedUsers.find(clientUserId) == mAllowedUsers.end())) { 988 ALOGE("CameraService::connect X (PID %d) rejected (cannot connect from " 989 "device user %d, currently allowed device users: %s)", callingPid, clientUserId, 990 toString(mAllowedUsers).string()); 991 return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, 992 "Callers from device user %d are not currently allowed to connect to camera \"%s\"", 993 clientUserId, cameraId.string()); 994 } 995 996 status_t err = checkIfDeviceIsUsable(cameraId); 997 if (err != NO_ERROR) { 998 switch(err) { 999 case -ENODEV: 1000 case -EBUSY: 1001 return STATUS_ERROR_FMT(ERROR_DISCONNECTED, 1002 "No camera device with ID \"%s\" currently available", cameraId.string()); 1003 default: 1004 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 1005 "Unknown error connecting to ID \"%s\"", cameraId.string()); 1006 } 1007 } 1008 return Status::ok(); 1009} 1010 1011status_t CameraService::checkIfDeviceIsUsable(const String8& cameraId) const { 1012 auto cameraState = getCameraState(cameraId); 1013 int callingPid = getCallingPid(); 1014 if (cameraState == nullptr) { 1015 ALOGE("CameraService::connect X (PID %d) rejected (invalid camera ID %s)", callingPid, 1016 cameraId.string()); 1017 return -ENODEV; 1018 } 1019 1020 int32_t currentStatus = cameraState->getStatus(); 1021 if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) { 1022 ALOGE("CameraService::connect X (PID %d) rejected (camera %s is not connected)", 1023 callingPid, cameraId.string()); 1024 return -ENODEV; 1025 } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) { 1026 ALOGE("CameraService::connect X (PID %d) rejected, (camera %s is initializing)", 1027 callingPid, cameraId.string()); 1028 return -EBUSY; 1029 } 1030 1031 return NO_ERROR; 1032} 1033 1034void CameraService::finishConnectLocked(const sp<BasicClient>& client, 1035 const CameraService::DescriptorPtr& desc) { 1036 1037 // Make a descriptor for the incoming client 1038 auto clientDescriptor = CameraService::CameraClientManager::makeClientDescriptor(client, desc); 1039 auto evicted = mActiveClientManager.addAndEvict(clientDescriptor); 1040 1041 logConnected(desc->getKey(), static_cast<int>(desc->getOwnerId()), 1042 String8(client->getPackageName())); 1043 1044 if (evicted.size() > 0) { 1045 // This should never happen - clients should already have been removed in disconnect 1046 for (auto& i : evicted) { 1047 ALOGE("%s: Invalid state: Client for camera %s was not removed in disconnect", 1048 __FUNCTION__, i->getKey().string()); 1049 } 1050 1051 LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, clients not evicted properly", 1052 __FUNCTION__); 1053 } 1054 1055 // And register a death notification for the client callback. Do 1056 // this last to avoid Binder policy where a nested Binder 1057 // transaction might be pre-empted to service the client death 1058 // notification if the client process dies before linkToDeath is 1059 // invoked. 1060 sp<IBinder> remoteCallback = client->getRemote(); 1061 if (remoteCallback != nullptr) { 1062 remoteCallback->linkToDeath(this); 1063 } 1064} 1065 1066status_t CameraService::handleEvictionsLocked(const String8& cameraId, int clientPid, 1067 apiLevel effectiveApiLevel, const sp<IBinder>& remoteCallback, const String8& packageName, 1068 /*out*/ 1069 sp<BasicClient>* client, 1070 std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>* partial) { 1071 ATRACE_CALL(); 1072 status_t ret = NO_ERROR; 1073 std::vector<DescriptorPtr> evictedClients; 1074 DescriptorPtr clientDescriptor; 1075 { 1076 if (effectiveApiLevel == API_1) { 1077 // If we are using API1, any existing client for this camera ID with the same remote 1078 // should be returned rather than evicted to allow MediaRecorder to work properly. 1079 1080 auto current = mActiveClientManager.get(cameraId); 1081 if (current != nullptr) { 1082 auto clientSp = current->getValue(); 1083 if (clientSp.get() != nullptr) { // should never be needed 1084 if (!clientSp->canCastToApiClient(effectiveApiLevel)) { 1085 ALOGW("CameraService connect called from same client, but with a different" 1086 " API level, evicting prior client..."); 1087 } else if (clientSp->getRemote() == remoteCallback) { 1088 ALOGI("CameraService::connect X (PID %d) (second call from same" 1089 " app binder, returning the same client)", clientPid); 1090 *client = clientSp; 1091 return NO_ERROR; 1092 } 1093 } 1094 } 1095 } 1096 1097 // Get current active client PIDs 1098 std::vector<int> ownerPids(mActiveClientManager.getAllOwners()); 1099 ownerPids.push_back(clientPid); 1100 1101 // Use the value +PROCESS_STATE_NONEXISTENT, to avoid taking 1102 // address of PROCESS_STATE_NONEXISTENT as a reference argument 1103 // for the vector constructor. PROCESS_STATE_NONEXISTENT does 1104 // not have an out-of-class definition. 1105 std::vector<int> priorities(ownerPids.size(), +PROCESS_STATE_NONEXISTENT); 1106 1107 // Get priorites of all active PIDs 1108 ProcessInfoService::getProcessStatesFromPids(ownerPids.size(), &ownerPids[0], 1109 /*out*/&priorities[0]); 1110 1111 // Update all active clients' priorities 1112 std::map<int,int> pidToPriorityMap; 1113 for (size_t i = 0; i < ownerPids.size() - 1; i++) { 1114 pidToPriorityMap.emplace(ownerPids[i], getCameraPriorityFromProcState(priorities[i])); 1115 } 1116 mActiveClientManager.updatePriorities(pidToPriorityMap); 1117 1118 // Get state for the given cameraId 1119 auto state = getCameraState(cameraId); 1120 if (state == nullptr) { 1121 ALOGE("CameraService::connect X (PID %d) rejected (no camera device with ID %s)", 1122 clientPid, cameraId.string()); 1123 // Should never get here because validateConnectLocked should have errored out 1124 return BAD_VALUE; 1125 } 1126 1127 // Make descriptor for incoming client 1128 clientDescriptor = CameraClientManager::makeClientDescriptor(cameraId, 1129 sp<BasicClient>{nullptr}, static_cast<int32_t>(state->getCost()), 1130 state->getConflicting(), 1131 getCameraPriorityFromProcState(priorities[priorities.size() - 1]), clientPid); 1132 1133 // Find clients that would be evicted 1134 auto evicted = mActiveClientManager.wouldEvict(clientDescriptor); 1135 1136 // If the incoming client was 'evicted,' higher priority clients have the camera in the 1137 // background, so we cannot do evictions 1138 if (std::find(evicted.begin(), evicted.end(), clientDescriptor) != evicted.end()) { 1139 ALOGE("CameraService::connect X (PID %d) rejected (existing client(s) with higher" 1140 " priority).", clientPid); 1141 1142 sp<BasicClient> clientSp = clientDescriptor->getValue(); 1143 String8 curTime = getFormattedCurrentTime(); 1144 auto incompatibleClients = 1145 mActiveClientManager.getIncompatibleClients(clientDescriptor); 1146 1147 String8 msg = String8::format("%s : DENIED connect device %s client for package %s " 1148 "(PID %d, priority %d) due to eviction policy", curTime.string(), 1149 cameraId.string(), packageName.string(), clientPid, 1150 getCameraPriorityFromProcState(priorities[priorities.size() - 1])); 1151 1152 for (auto& i : incompatibleClients) { 1153 msg.appendFormat("\n - Blocked by existing device %s client for package %s" 1154 "(PID %" PRId32 ", priority %" PRId32 ")", i->getKey().string(), 1155 String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(), 1156 i->getPriority()); 1157 ALOGE(" Conflicts with: Device %s, client package %s (PID %" 1158 PRId32 ", priority %" PRId32 ")", i->getKey().string(), 1159 String8{i->getValue()->getPackageName()}.string(), i->getOwnerId(), 1160 i->getPriority()); 1161 } 1162 1163 // Log the client's attempt 1164 Mutex::Autolock l(mLogLock); 1165 mEventLog.add(msg); 1166 1167 return -EBUSY; 1168 } 1169 1170 for (auto& i : evicted) { 1171 sp<BasicClient> clientSp = i->getValue(); 1172 if (clientSp.get() == nullptr) { 1173 ALOGE("%s: Invalid state: Null client in active client list.", __FUNCTION__); 1174 1175 // TODO: Remove this 1176 LOG_ALWAYS_FATAL("%s: Invalid state for CameraService, null client in active list", 1177 __FUNCTION__); 1178 mActiveClientManager.remove(i); 1179 continue; 1180 } 1181 1182 ALOGE("CameraService::connect evicting conflicting client for camera ID %s", 1183 i->getKey().string()); 1184 evictedClients.push_back(i); 1185 1186 // Log the clients evicted 1187 logEvent(String8::format("EVICT device %s client held by package %s (PID" 1188 " %" PRId32 ", priority %" PRId32 ")\n - Evicted by device %s client for" 1189 " package %s (PID %d, priority %" PRId32 ")", 1190 i->getKey().string(), String8{clientSp->getPackageName()}.string(), 1191 i->getOwnerId(), i->getPriority(), cameraId.string(), 1192 packageName.string(), clientPid, 1193 getCameraPriorityFromProcState(priorities[priorities.size() - 1]))); 1194 1195 // Notify the client of disconnection 1196 clientSp->notifyError(hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED, 1197 CaptureResultExtras()); 1198 } 1199 } 1200 1201 // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking 1202 // other clients from connecting in mServiceLockWrapper if held 1203 mServiceLock.unlock(); 1204 1205 // Clear caller identity temporarily so client disconnect PID checks work correctly 1206 int64_t token = IPCThreadState::self()->clearCallingIdentity(); 1207 1208 // Destroy evicted clients 1209 for (auto& i : evictedClients) { 1210 // Disconnect is blocking, and should only have returned when HAL has cleaned up 1211 i->getValue()->disconnect(); // Clients will remove themselves from the active client list 1212 } 1213 1214 IPCThreadState::self()->restoreCallingIdentity(token); 1215 1216 for (const auto& i : evictedClients) { 1217 ALOGV("%s: Waiting for disconnect to complete for client for device %s (PID %" PRId32 ")", 1218 __FUNCTION__, i->getKey().string(), i->getOwnerId()); 1219 ret = mActiveClientManager.waitUntilRemoved(i, DEFAULT_DISCONNECT_TIMEOUT_NS); 1220 if (ret == TIMED_OUT) { 1221 ALOGE("%s: Timed out waiting for client for device %s to disconnect, " 1222 "current clients:\n%s", __FUNCTION__, i->getKey().string(), 1223 mActiveClientManager.toString().string()); 1224 return -EBUSY; 1225 } 1226 if (ret != NO_ERROR) { 1227 ALOGE("%s: Received error waiting for client for device %s to disconnect: %s (%d), " 1228 "current clients:\n%s", __FUNCTION__, i->getKey().string(), strerror(-ret), 1229 ret, mActiveClientManager.toString().string()); 1230 return ret; 1231 } 1232 } 1233 1234 evictedClients.clear(); 1235 1236 // Once clients have been disconnected, relock 1237 mServiceLock.lock(); 1238 1239 // Check again if the device was unplugged or something while we weren't holding mServiceLock 1240 if ((ret = checkIfDeviceIsUsable(cameraId)) != NO_ERROR) { 1241 return ret; 1242 } 1243 1244 *partial = clientDescriptor; 1245 return NO_ERROR; 1246} 1247 1248Status CameraService::connect( 1249 const sp<ICameraClient>& cameraClient, 1250 int cameraId, 1251 const String16& clientPackageName, 1252 int clientUid, 1253 int clientPid, 1254 /*out*/ 1255 sp<ICamera>* device) { 1256 1257 ATRACE_CALL(); 1258 Status ret = Status::ok(); 1259 String8 id = String8::format("%d", cameraId); 1260 sp<Client> client = nullptr; 1261 ret = connectHelper<ICameraClient,Client>(cameraClient, id, 1262 CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, clientUid, clientPid, API_1, 1263 /*legacyMode*/ false, /*shimUpdateOnly*/ false, 1264 /*out*/client); 1265 1266 if(!ret.isOk()) { 1267 logRejected(id, getCallingPid(), String8(clientPackageName), 1268 ret.toString8()); 1269 return ret; 1270 } 1271 1272 *device = client; 1273 return ret; 1274} 1275 1276Status CameraService::connectLegacy( 1277 const sp<ICameraClient>& cameraClient, 1278 int cameraId, int halVersion, 1279 const String16& clientPackageName, 1280 int clientUid, 1281 /*out*/ 1282 sp<ICamera>* device) { 1283 1284 ATRACE_CALL(); 1285 String8 id = String8::format("%d", cameraId); 1286 int apiVersion = mModule->getModuleApiVersion(); 1287 if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED && 1288 apiVersion < CAMERA_MODULE_API_VERSION_2_3) { 1289 /* 1290 * Either the HAL version is unspecified in which case this just creates 1291 * a camera client selected by the latest device version, or 1292 * it's a particular version in which case the HAL must supported 1293 * the open_legacy call 1294 */ 1295 String8 msg = String8::format("Camera HAL module version %x too old for connectLegacy!", 1296 apiVersion); 1297 ALOGE("%s: %s", 1298 __FUNCTION__, msg.string()); 1299 logRejected(id, getCallingPid(), String8(clientPackageName), 1300 msg); 1301 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string()); 1302 } 1303 1304 Status ret = Status::ok(); 1305 sp<Client> client = nullptr; 1306 ret = connectHelper<ICameraClient,Client>(cameraClient, id, halVersion, 1307 clientPackageName, clientUid, USE_CALLING_PID, API_1, 1308 /*legacyMode*/ true, /*shimUpdateOnly*/ false, 1309 /*out*/client); 1310 1311 if(!ret.isOk()) { 1312 logRejected(id, getCallingPid(), String8(clientPackageName), 1313 ret.toString8()); 1314 return ret; 1315 } 1316 1317 *device = client; 1318 return ret; 1319} 1320 1321Status CameraService::connectDevice( 1322 const sp<hardware::camera2::ICameraDeviceCallbacks>& cameraCb, 1323 int cameraId, 1324 const String16& clientPackageName, 1325 int clientUid, 1326 /*out*/ 1327 sp<hardware::camera2::ICameraDeviceUser>* device) { 1328 1329 ATRACE_CALL(); 1330 Status ret = Status::ok(); 1331 String8 id = String8::format("%d", cameraId); 1332 sp<CameraDeviceClient> client = nullptr; 1333 ret = connectHelper<hardware::camera2::ICameraDeviceCallbacks,CameraDeviceClient>(cameraCb, id, 1334 CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, 1335 clientUid, USE_CALLING_PID, API_2, 1336 /*legacyMode*/ false, /*shimUpdateOnly*/ false, 1337 /*out*/client); 1338 1339 if(!ret.isOk()) { 1340 logRejected(id, getCallingPid(), String8(clientPackageName), 1341 ret.toString8()); 1342 return ret; 1343 } 1344 1345 *device = client; 1346 return ret; 1347} 1348 1349Status CameraService::setTorchMode(const String16& cameraId, bool enabled, 1350 const sp<IBinder>& clientBinder) { 1351 1352 ATRACE_CALL(); 1353 if (enabled && clientBinder == nullptr) { 1354 ALOGE("%s: torch client binder is NULL", __FUNCTION__); 1355 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, 1356 "Torch client Binder is null"); 1357 } 1358 1359 String8 id = String8(cameraId.string()); 1360 int uid = getCallingUid(); 1361 1362 // verify id is valid. 1363 auto state = getCameraState(id); 1364 if (state == nullptr) { 1365 ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string()); 1366 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 1367 "Camera ID \"%s\" is a not valid camera ID", id.string()); 1368 } 1369 1370 int32_t cameraStatus = state->getStatus(); 1371 if (cameraStatus != ICameraServiceListener::STATUS_PRESENT && 1372 cameraStatus != ICameraServiceListener::STATUS_NOT_AVAILABLE) { 1373 ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string()); 1374 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 1375 "Camera ID \"%s\" is a not valid camera ID", id.string()); 1376 } 1377 1378 { 1379 Mutex::Autolock al(mTorchStatusMutex); 1380 int32_t status; 1381 status_t err = getTorchStatusLocked(id, &status); 1382 if (err != OK) { 1383 if (err == NAME_NOT_FOUND) { 1384 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 1385 "Camera \"%s\" does not have a flash unit", id.string()); 1386 } 1387 ALOGE("%s: getting current torch status failed for camera %s", 1388 __FUNCTION__, id.string()); 1389 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 1390 "Error updating torch status for camera \"%s\": %s (%d)", id.string(), 1391 strerror(-err), err); 1392 } 1393 1394 if (status == ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE) { 1395 if (cameraStatus == ICameraServiceListener::STATUS_NOT_AVAILABLE) { 1396 ALOGE("%s: torch mode of camera %s is not available because " 1397 "camera is in use", __FUNCTION__, id.string()); 1398 return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE, 1399 "Torch for camera \"%s\" is not available due to an existing camera user", 1400 id.string()); 1401 } else { 1402 ALOGE("%s: torch mode of camera %s is not available due to " 1403 "insufficient resources", __FUNCTION__, id.string()); 1404 return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE, 1405 "Torch for camera \"%s\" is not available due to insufficient resources", 1406 id.string()); 1407 } 1408 } 1409 } 1410 1411 { 1412 // Update UID map - this is used in the torch status changed callbacks, so must be done 1413 // before setTorchMode 1414 Mutex::Autolock al(mTorchUidMapMutex); 1415 if (mTorchUidMap.find(id) == mTorchUidMap.end()) { 1416 mTorchUidMap[id].first = uid; 1417 mTorchUidMap[id].second = uid; 1418 } else { 1419 // Set the pending UID 1420 mTorchUidMap[id].first = uid; 1421 } 1422 } 1423 1424 status_t err = mFlashlight->setTorchMode(id, enabled); 1425 1426 if (err != OK) { 1427 int32_t errorCode; 1428 String8 msg; 1429 switch (err) { 1430 case -ENOSYS: 1431 msg = String8::format("Camera \"%s\" has no flashlight", 1432 id.string()); 1433 errorCode = ERROR_ILLEGAL_ARGUMENT; 1434 break; 1435 default: 1436 msg = String8::format( 1437 "Setting torch mode of camera \"%s\" to %d failed: %s (%d)", 1438 id.string(), enabled, strerror(-err), err); 1439 errorCode = ERROR_INVALID_OPERATION; 1440 } 1441 ALOGE("%s: %s", __FUNCTION__, msg.string()); 1442 return STATUS_ERROR(errorCode, msg.string()); 1443 } 1444 1445 { 1446 // update the link to client's death 1447 Mutex::Autolock al(mTorchClientMapMutex); 1448 ssize_t index = mTorchClientMap.indexOfKey(id); 1449 if (enabled) { 1450 if (index == NAME_NOT_FOUND) { 1451 mTorchClientMap.add(id, clientBinder); 1452 } else { 1453 mTorchClientMap.valueAt(index)->unlinkToDeath(this); 1454 mTorchClientMap.replaceValueAt(index, clientBinder); 1455 } 1456 clientBinder->linkToDeath(this); 1457 } else if (index != NAME_NOT_FOUND) { 1458 mTorchClientMap.valueAt(index)->unlinkToDeath(this); 1459 } 1460 } 1461 1462 return Status::ok(); 1463} 1464 1465Status CameraService::notifySystemEvent(int32_t eventId, 1466 const std::vector<int32_t>& args) { 1467 ATRACE_CALL(); 1468 1469 switch(eventId) { 1470 case ICameraService::EVENT_USER_SWITCHED: { 1471 doUserSwitch(/*newUserIds*/ args); 1472 break; 1473 } 1474 case ICameraService::EVENT_NONE: 1475 default: { 1476 ALOGW("%s: Received invalid system event from system_server: %d", __FUNCTION__, 1477 eventId); 1478 break; 1479 } 1480 } 1481 return Status::ok(); 1482} 1483 1484Status CameraService::addListener(const sp<ICameraServiceListener>& listener) { 1485 ATRACE_CALL(); 1486 1487 ALOGV("%s: Add listener %p", __FUNCTION__, listener.get()); 1488 1489 if (listener == nullptr) { 1490 ALOGE("%s: Listener must not be null", __FUNCTION__); 1491 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Null listener given to addListener"); 1492 } 1493 1494 Mutex::Autolock lock(mServiceLock); 1495 1496 { 1497 Mutex::Autolock lock(mStatusListenerLock); 1498 for (auto& it : mListenerList) { 1499 if (IInterface::asBinder(it) == IInterface::asBinder(listener)) { 1500 ALOGW("%s: Tried to add listener %p which was already subscribed", 1501 __FUNCTION__, listener.get()); 1502 return STATUS_ERROR(ERROR_ALREADY_EXISTS, "Listener already registered"); 1503 } 1504 } 1505 1506 mListenerList.push_back(listener); 1507 } 1508 1509 1510 /* Immediately signal current status to this listener only */ 1511 { 1512 Mutex::Autolock lock(mCameraStatesLock); 1513 for (auto& i : mCameraStates) { 1514 // TODO: Update binder to use String16 for camera IDs and remove; 1515 int id = cameraIdToInt(i.first); 1516 if (id == -1) continue; 1517 1518 listener->onStatusChanged(i.second->getStatus(), id); 1519 } 1520 } 1521 1522 /* Immediately signal current torch status to this listener only */ 1523 { 1524 Mutex::Autolock al(mTorchStatusMutex); 1525 for (size_t i = 0; i < mTorchStatusMap.size(); i++ ) { 1526 String16 id = String16(mTorchStatusMap.keyAt(i).string()); 1527 listener->onTorchStatusChanged(mTorchStatusMap.valueAt(i), id); 1528 } 1529 } 1530 1531 return Status::ok(); 1532} 1533 1534Status CameraService::removeListener(const sp<ICameraServiceListener>& listener) { 1535 ATRACE_CALL(); 1536 1537 ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get()); 1538 1539 if (listener == 0) { 1540 ALOGE("%s: Listener must not be null", __FUNCTION__); 1541 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Null listener given to removeListener"); 1542 } 1543 1544 Mutex::Autolock lock(mServiceLock); 1545 1546 { 1547 Mutex::Autolock lock(mStatusListenerLock); 1548 for (auto it = mListenerList.begin(); it != mListenerList.end(); it++) { 1549 if (IInterface::asBinder(*it) == IInterface::asBinder(listener)) { 1550 mListenerList.erase(it); 1551 return Status::ok(); 1552 } 1553 } 1554 } 1555 1556 ALOGW("%s: Tried to remove a listener %p which was not subscribed", 1557 __FUNCTION__, listener.get()); 1558 1559 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Unregistered listener given to removeListener"); 1560} 1561 1562Status CameraService::getLegacyParameters(int cameraId, /*out*/String16* parameters) { 1563 1564 ATRACE_CALL(); 1565 ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId); 1566 1567 if (parameters == NULL) { 1568 ALOGE("%s: parameters must not be null", __FUNCTION__); 1569 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Parameters must not be null"); 1570 } 1571 1572 Status ret = Status::ok(); 1573 1574 CameraParameters shimParams; 1575 if (!(ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)).isOk()) { 1576 // Error logged by caller 1577 return ret; 1578 } 1579 1580 String8 shimParamsString8 = shimParams.flatten(); 1581 String16 shimParamsString16 = String16(shimParamsString8); 1582 1583 *parameters = shimParamsString16; 1584 1585 return ret; 1586} 1587 1588Status CameraService::supportsCameraApi(int cameraId, int apiVersion, bool *isSupported) { 1589 ATRACE_CALL(); 1590 1591 ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId); 1592 1593 switch (apiVersion) { 1594 case API_VERSION_1: 1595 case API_VERSION_2: 1596 break; 1597 default: 1598 String8 msg = String8::format("Unknown API version %d", apiVersion); 1599 ALOGE("%s: %s", __FUNCTION__, msg.string()); 1600 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string()); 1601 } 1602 1603 int facing = -1; 1604 int deviceVersion = getDeviceVersion(cameraId, &facing); 1605 1606 switch(deviceVersion) { 1607 case CAMERA_DEVICE_API_VERSION_1_0: 1608 case CAMERA_DEVICE_API_VERSION_3_0: 1609 case CAMERA_DEVICE_API_VERSION_3_1: 1610 if (apiVersion == API_VERSION_2) { 1611 ALOGV("%s: Camera id %d uses HAL version %d <3.2, doesn't support api2 without shim", 1612 __FUNCTION__, cameraId, deviceVersion); 1613 *isSupported = false; 1614 } else { // if (apiVersion == API_VERSION_1) { 1615 ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported", 1616 __FUNCTION__, cameraId); 1617 *isSupported = true; 1618 } 1619 break; 1620 case CAMERA_DEVICE_API_VERSION_3_2: 1621 case CAMERA_DEVICE_API_VERSION_3_3: 1622 case CAMERA_DEVICE_API_VERSION_3_4: 1623 ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly", 1624 __FUNCTION__, cameraId); 1625 *isSupported = true; 1626 break; 1627 case -1: { 1628 String8 msg = String8::format("Unknown camera ID %d", cameraId); 1629 ALOGE("%s: %s", __FUNCTION__, msg.string()); 1630 return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, msg.string()); 1631 } 1632 default: { 1633 String8 msg = String8::format("Unknown device version %d for device %d", 1634 deviceVersion, cameraId); 1635 ALOGE("%s: %s", __FUNCTION__, msg.string()); 1636 return STATUS_ERROR(ERROR_INVALID_OPERATION, msg.string()); 1637 } 1638 } 1639 1640 return Status::ok(); 1641} 1642 1643void CameraService::removeByClient(const BasicClient* client) { 1644 Mutex::Autolock lock(mServiceLock); 1645 for (auto& i : mActiveClientManager.getAll()) { 1646 auto clientSp = i->getValue(); 1647 if (clientSp.get() == client) { 1648 mActiveClientManager.remove(i); 1649 } 1650 } 1651} 1652 1653bool CameraService::evictClientIdByRemote(const wp<IBinder>& remote) { 1654 const int callingPid = getCallingPid(); 1655 const int servicePid = getpid(); 1656 bool ret = false; 1657 { 1658 // Acquire mServiceLock and prevent other clients from connecting 1659 std::unique_ptr<AutoConditionLock> lock = 1660 AutoConditionLock::waitAndAcquire(mServiceLockWrapper); 1661 1662 1663 std::vector<sp<BasicClient>> evicted; 1664 for (auto& i : mActiveClientManager.getAll()) { 1665 auto clientSp = i->getValue(); 1666 if (clientSp.get() == nullptr) { 1667 ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__); 1668 mActiveClientManager.remove(i); 1669 continue; 1670 } 1671 if (remote == clientSp->getRemote() && (callingPid == servicePid || 1672 callingPid == clientSp->getClientPid())) { 1673 mActiveClientManager.remove(i); 1674 evicted.push_back(clientSp); 1675 1676 // Notify the client of disconnection 1677 clientSp->notifyError( 1678 hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DISCONNECTED, 1679 CaptureResultExtras()); 1680 } 1681 } 1682 1683 // Do not hold mServiceLock while disconnecting clients, but retain the condition blocking 1684 // other clients from connecting in mServiceLockWrapper if held 1685 mServiceLock.unlock(); 1686 1687 // Do not clear caller identity, remote caller should be client proccess 1688 1689 for (auto& i : evicted) { 1690 if (i.get() != nullptr) { 1691 i->disconnect(); 1692 ret = true; 1693 } 1694 } 1695 1696 // Reacquire mServiceLock 1697 mServiceLock.lock(); 1698 1699 } // lock is destroyed, allow further connect calls 1700 1701 return ret; 1702} 1703 1704 1705/** 1706 * Check camera capabilities, such as support for basic color operation 1707 * Also check that the device HAL version is still in support 1708 */ 1709int CameraService::checkCameraCapabilities(int id, camera_info info, int *latestStrangeCameraId) { 1710 // device_version undefined in CAMERA_MODULE_API_VERSION_1_0, 1711 // All CAMERA_MODULE_API_VERSION_1_0 devices are backward-compatible 1712 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0) { 1713 // Verify the device version is in the supported range 1714 switch (info.device_version) { 1715 case CAMERA_DEVICE_API_VERSION_1_0: 1716 case CAMERA_DEVICE_API_VERSION_3_0: 1717 case CAMERA_DEVICE_API_VERSION_3_1: 1718 case CAMERA_DEVICE_API_VERSION_3_2: 1719 case CAMERA_DEVICE_API_VERSION_3_3: 1720 case CAMERA_DEVICE_API_VERSION_3_4: 1721 // in support 1722 break; 1723 case CAMERA_DEVICE_API_VERSION_2_0: 1724 case CAMERA_DEVICE_API_VERSION_2_1: 1725 // no longer supported 1726 default: 1727 ALOGE("%s: Device %d has HAL version %x, which is not supported", 1728 __FUNCTION__, id, info.device_version); 1729 String8 msg = String8::format( 1730 "Unsupported device HAL version %x for device %d", 1731 info.device_version, id); 1732 logServiceError(msg.string(), NO_INIT); 1733 return NO_INIT; 1734 } 1735 } 1736 1737 // Assume all devices pre-v3.3 are backward-compatible 1738 bool isBackwardCompatible = true; 1739 if (mModule->getModuleApiVersion() >= CAMERA_MODULE_API_VERSION_2_0 1740 && info.device_version >= CAMERA_DEVICE_API_VERSION_3_3) { 1741 isBackwardCompatible = false; 1742 status_t res; 1743 camera_metadata_ro_entry_t caps; 1744 res = find_camera_metadata_ro_entry( 1745 info.static_camera_characteristics, 1746 ANDROID_REQUEST_AVAILABLE_CAPABILITIES, 1747 &caps); 1748 if (res != 0) { 1749 ALOGW("%s: Unable to find camera capabilities for camera device %d", 1750 __FUNCTION__, id); 1751 caps.count = 0; 1752 } 1753 for (size_t i = 0; i < caps.count; i++) { 1754 if (caps.data.u8[i] == 1755 ANDROID_REQUEST_AVAILABLE_CAPABILITIES_BACKWARD_COMPATIBLE) { 1756 isBackwardCompatible = true; 1757 break; 1758 } 1759 } 1760 } 1761 1762 if (!isBackwardCompatible) { 1763 mNumberOfNormalCameras--; 1764 *latestStrangeCameraId = id; 1765 } else { 1766 if (id > *latestStrangeCameraId) { 1767 ALOGE("%s: Normal camera ID %d higher than strange camera ID %d. " 1768 "This is not allowed due backward-compatibility requirements", 1769 __FUNCTION__, id, *latestStrangeCameraId); 1770 logServiceError("Invalid order of camera devices", NO_INIT); 1771 mNumberOfCameras = 0; 1772 mNumberOfNormalCameras = 0; 1773 return NO_INIT; 1774 } 1775 } 1776 return OK; 1777} 1778 1779std::shared_ptr<CameraService::CameraState> CameraService::getCameraState( 1780 const String8& cameraId) const { 1781 std::shared_ptr<CameraState> state; 1782 { 1783 Mutex::Autolock lock(mCameraStatesLock); 1784 auto iter = mCameraStates.find(cameraId); 1785 if (iter != mCameraStates.end()) { 1786 state = iter->second; 1787 } 1788 } 1789 return state; 1790} 1791 1792sp<CameraService::BasicClient> CameraService::removeClientLocked(const String8& cameraId) { 1793 // Remove from active clients list 1794 auto clientDescriptorPtr = mActiveClientManager.remove(cameraId); 1795 if (clientDescriptorPtr == nullptr) { 1796 ALOGW("%s: Could not evict client, no client for camera ID %s", __FUNCTION__, 1797 cameraId.string()); 1798 return sp<BasicClient>{nullptr}; 1799 } 1800 1801 return clientDescriptorPtr->getValue(); 1802} 1803 1804void CameraService::doUserSwitch(const std::vector<int32_t>& newUserIds) { 1805 // Acquire mServiceLock and prevent other clients from connecting 1806 std::unique_ptr<AutoConditionLock> lock = 1807 AutoConditionLock::waitAndAcquire(mServiceLockWrapper); 1808 1809 std::set<userid_t> newAllowedUsers; 1810 for (size_t i = 0; i < newUserIds.size(); i++) { 1811 if (newUserIds[i] < 0) { 1812 ALOGE("%s: Bad user ID %d given during user switch, ignoring.", 1813 __FUNCTION__, newUserIds[i]); 1814 return; 1815 } 1816 newAllowedUsers.insert(static_cast<userid_t>(newUserIds[i])); 1817 } 1818 1819 1820 if (newAllowedUsers == mAllowedUsers) { 1821 ALOGW("%s: Received notification of user switch with no updated user IDs.", __FUNCTION__); 1822 return; 1823 } 1824 1825 logUserSwitch(mAllowedUsers, newAllowedUsers); 1826 1827 mAllowedUsers = std::move(newAllowedUsers); 1828 1829 // Current user has switched, evict all current clients. 1830 std::vector<sp<BasicClient>> evicted; 1831 for (auto& i : mActiveClientManager.getAll()) { 1832 auto clientSp = i->getValue(); 1833 1834 if (clientSp.get() == nullptr) { 1835 ALOGE("%s: Dead client still in mActiveClientManager.", __FUNCTION__); 1836 continue; 1837 } 1838 1839 // Don't evict clients that are still allowed. 1840 uid_t clientUid = clientSp->getClientUid(); 1841 userid_t clientUserId = multiuser_get_user_id(clientUid); 1842 if (mAllowedUsers.find(clientUserId) != mAllowedUsers.end()) { 1843 continue; 1844 } 1845 1846 evicted.push_back(clientSp); 1847 1848 String8 curTime = getFormattedCurrentTime(); 1849 1850 ALOGE("Evicting conflicting client for camera ID %s due to user change", 1851 i->getKey().string()); 1852 1853 // Log the clients evicted 1854 logEvent(String8::format("EVICT device %s client held by package %s (PID %" 1855 PRId32 ", priority %" PRId32 ")\n - Evicted due to user switch.", 1856 i->getKey().string(), String8{clientSp->getPackageName()}.string(), 1857 i->getOwnerId(), i->getPriority())); 1858 1859 } 1860 1861 // Do not hold mServiceLock while disconnecting clients, but retain the condition 1862 // blocking other clients from connecting in mServiceLockWrapper if held. 1863 mServiceLock.unlock(); 1864 1865 // Clear caller identity temporarily so client disconnect PID checks work correctly 1866 int64_t token = IPCThreadState::self()->clearCallingIdentity(); 1867 1868 for (auto& i : evicted) { 1869 i->disconnect(); 1870 } 1871 1872 IPCThreadState::self()->restoreCallingIdentity(token); 1873 1874 // Reacquire mServiceLock 1875 mServiceLock.lock(); 1876} 1877 1878void CameraService::logEvent(const char* event) { 1879 String8 curTime = getFormattedCurrentTime(); 1880 Mutex::Autolock l(mLogLock); 1881 mEventLog.add(String8::format("%s : %s", curTime.string(), event)); 1882} 1883 1884void CameraService::logDisconnected(const char* cameraId, int clientPid, 1885 const char* clientPackage) { 1886 // Log the clients evicted 1887 logEvent(String8::format("DISCONNECT device %s client for package %s (PID %d)", cameraId, 1888 clientPackage, clientPid)); 1889} 1890 1891void CameraService::logConnected(const char* cameraId, int clientPid, 1892 const char* clientPackage) { 1893 // Log the clients evicted 1894 logEvent(String8::format("CONNECT device %s client for package %s (PID %d)", cameraId, 1895 clientPackage, clientPid)); 1896} 1897 1898void CameraService::logRejected(const char* cameraId, int clientPid, 1899 const char* clientPackage, const char* reason) { 1900 // Log the client rejected 1901 logEvent(String8::format("REJECT device %s client for package %s (PID %d), reason: (%s)", 1902 cameraId, clientPackage, clientPid, reason)); 1903} 1904 1905void CameraService::logUserSwitch(const std::set<userid_t>& oldUserIds, 1906 const std::set<userid_t>& newUserIds) { 1907 String8 newUsers = toString(newUserIds); 1908 String8 oldUsers = toString(oldUserIds); 1909 // Log the new and old users 1910 logEvent(String8::format("USER_SWITCH previous allowed users: %s , current allowed users: %s", 1911 oldUsers.string(), newUsers.string())); 1912} 1913 1914void CameraService::logDeviceRemoved(const char* cameraId, const char* reason) { 1915 // Log the device removal 1916 logEvent(String8::format("REMOVE device %s, reason: (%s)", cameraId, reason)); 1917} 1918 1919void CameraService::logDeviceAdded(const char* cameraId, const char* reason) { 1920 // Log the device removal 1921 logEvent(String8::format("ADD device %s, reason: (%s)", cameraId, reason)); 1922} 1923 1924void CameraService::logClientDied(int clientPid, const char* reason) { 1925 // Log the device removal 1926 logEvent(String8::format("DIED client(s) with PID %d, reason: (%s)", clientPid, reason)); 1927} 1928 1929void CameraService::logServiceError(const char* msg, int errorCode) { 1930 String8 curTime = getFormattedCurrentTime(); 1931 logEvent(String8::format("SERVICE ERROR: %s : %d (%s)", msg, errorCode, strerror(-errorCode))); 1932} 1933 1934status_t CameraService::onTransact(uint32_t code, const Parcel& data, Parcel* reply, 1935 uint32_t flags) { 1936 1937 const int pid = getCallingPid(); 1938 const int selfPid = getpid(); 1939 1940 // Permission checks 1941 switch (code) { 1942 case BnCameraService::NOTIFYSYSTEMEVENT: { 1943 if (pid != selfPid) { 1944 // Ensure we're being called by system_server, or similar process with 1945 // permissions to notify the camera service about system events 1946 if (!checkCallingPermission( 1947 String16("android.permission.CAMERA_SEND_SYSTEM_EVENTS"))) { 1948 const int uid = getCallingUid(); 1949 ALOGE("Permission Denial: cannot send updates to camera service about system" 1950 " events from pid=%d, uid=%d", pid, uid); 1951 return PERMISSION_DENIED; 1952 } 1953 } 1954 break; 1955 } 1956 } 1957 1958 return BnCameraService::onTransact(code, data, reply, flags); 1959} 1960 1961// We share the media players for shutter and recording sound for all clients. 1962// A reference count is kept to determine when we will actually release the 1963// media players. 1964 1965MediaPlayer* CameraService::newMediaPlayer(const char *file) { 1966 MediaPlayer* mp = new MediaPlayer(); 1967 if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) { 1968 mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE); 1969 mp->prepare(); 1970 } else { 1971 ALOGE("Failed to load CameraService sounds: %s", file); 1972 return NULL; 1973 } 1974 return mp; 1975} 1976 1977void CameraService::loadSound() { 1978 ATRACE_CALL(); 1979 1980 Mutex::Autolock lock(mSoundLock); 1981 LOG1("CameraService::loadSound ref=%d", mSoundRef); 1982 if (mSoundRef++) return; 1983 1984 mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg"); 1985 mSoundPlayer[SOUND_RECORDING_START] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg"); 1986 mSoundPlayer[SOUND_RECORDING_STOP] = newMediaPlayer("/system/media/audio/ui/VideoStop.ogg"); 1987} 1988 1989void CameraService::releaseSound() { 1990 Mutex::Autolock lock(mSoundLock); 1991 LOG1("CameraService::releaseSound ref=%d", mSoundRef); 1992 if (--mSoundRef) return; 1993 1994 for (int i = 0; i < NUM_SOUNDS; i++) { 1995 if (mSoundPlayer[i] != 0) { 1996 mSoundPlayer[i]->disconnect(); 1997 mSoundPlayer[i].clear(); 1998 } 1999 } 2000} 2001 2002void CameraService::playSound(sound_kind kind) { 2003 ATRACE_CALL(); 2004 2005 LOG1("playSound(%d)", kind); 2006 Mutex::Autolock lock(mSoundLock); 2007 sp<MediaPlayer> player = mSoundPlayer[kind]; 2008 if (player != 0) { 2009 player->seekTo(0); 2010 player->start(); 2011 } 2012} 2013 2014// ---------------------------------------------------------------------------- 2015 2016CameraService::Client::Client(const sp<CameraService>& cameraService, 2017 const sp<ICameraClient>& cameraClient, 2018 const String16& clientPackageName, 2019 int cameraId, int cameraFacing, 2020 int clientPid, uid_t clientUid, 2021 int servicePid) : 2022 CameraService::BasicClient(cameraService, 2023 IInterface::asBinder(cameraClient), 2024 clientPackageName, 2025 cameraId, cameraFacing, 2026 clientPid, clientUid, 2027 servicePid) 2028{ 2029 int callingPid = getCallingPid(); 2030 LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId); 2031 2032 mRemoteCallback = cameraClient; 2033 2034 cameraService->loadSound(); 2035 2036 LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId); 2037} 2038 2039// tear down the client 2040CameraService::Client::~Client() { 2041 ALOGV("~Client"); 2042 mDestructionStarted = true; 2043 2044 mCameraService->releaseSound(); 2045 // unconditionally disconnect. function is idempotent 2046 Client::disconnect(); 2047} 2048 2049CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService, 2050 const sp<IBinder>& remoteCallback, 2051 const String16& clientPackageName, 2052 int cameraId, int cameraFacing, 2053 int clientPid, uid_t clientUid, 2054 int servicePid): 2055 mClientPackageName(clientPackageName), mDisconnected(false) 2056{ 2057 mCameraService = cameraService; 2058 mRemoteBinder = remoteCallback; 2059 mCameraId = cameraId; 2060 mCameraFacing = cameraFacing; 2061 mClientPid = clientPid; 2062 mClientUid = clientUid; 2063 mServicePid = servicePid; 2064 mOpsActive = false; 2065 mDestructionStarted = false; 2066 2067 // In some cases the calling code has no access to the package it runs under. 2068 // For example, NDK camera API. 2069 // In this case we will get the packages for the calling UID and pick the first one 2070 // for attributing the app op. This will work correctly for runtime permissions 2071 // as for legacy apps we will toggle the app op for all packages in the UID. 2072 // The caveat is that the operation may be attributed to the wrong package and 2073 // stats based on app ops may be slightly off. 2074 if (mClientPackageName.size() <= 0) { 2075 sp<IServiceManager> sm = defaultServiceManager(); 2076 sp<IBinder> binder = sm->getService(String16(kPermissionServiceName)); 2077 if (binder == 0) { 2078 ALOGE("Cannot get permission service"); 2079 // Leave mClientPackageName unchanged (empty) and the further interaction 2080 // with camera will fail in BasicClient::startCameraOps 2081 return; 2082 } 2083 2084 sp<IPermissionController> permCtrl = interface_cast<IPermissionController>(binder); 2085 Vector<String16> packages; 2086 2087 permCtrl->getPackagesForUid(mClientUid, packages); 2088 2089 if (packages.isEmpty()) { 2090 ALOGE("No packages for calling UID"); 2091 // Leave mClientPackageName unchanged (empty) and the further interaction 2092 // with camera will fail in BasicClient::startCameraOps 2093 return; 2094 } 2095 mClientPackageName = packages[0]; 2096 } 2097} 2098 2099CameraService::BasicClient::~BasicClient() { 2100 ALOGV("~BasicClient"); 2101 mDestructionStarted = true; 2102} 2103 2104binder::Status CameraService::BasicClient::disconnect() { 2105 binder::Status res = Status::ok(); 2106 if (mDisconnected) { 2107 return res; 2108 } 2109 mDisconnected = true; 2110 2111 mCameraService->removeByClient(this); 2112 mCameraService->logDisconnected(String8::format("%d", mCameraId), mClientPid, 2113 String8(mClientPackageName)); 2114 2115 sp<IBinder> remote = getRemote(); 2116 if (remote != nullptr) { 2117 remote->unlinkToDeath(mCameraService); 2118 } 2119 2120 finishCameraOps(); 2121 ALOGI("%s: Disconnected client for camera %d for PID %d", __FUNCTION__, mCameraId, mClientPid); 2122 2123 // client shouldn't be able to call into us anymore 2124 mClientPid = 0; 2125 2126 return res; 2127} 2128 2129status_t CameraService::BasicClient::dump(int, const Vector<String16>&) { 2130 // No dumping of clients directly over Binder, 2131 // must go through CameraService::dump 2132 android_errorWriteWithInfoLog(SN_EVENT_LOG_ID, "26265403", 2133 IPCThreadState::self()->getCallingUid(), NULL, 0); 2134 return OK; 2135} 2136 2137String16 CameraService::BasicClient::getPackageName() const { 2138 return mClientPackageName; 2139} 2140 2141 2142int CameraService::BasicClient::getClientPid() const { 2143 return mClientPid; 2144} 2145 2146uid_t CameraService::BasicClient::getClientUid() const { 2147 return mClientUid; 2148} 2149 2150bool CameraService::BasicClient::canCastToApiClient(apiLevel level) const { 2151 // Defaults to API2. 2152 return level == API_2; 2153} 2154 2155status_t CameraService::BasicClient::startCameraOps() { 2156 ATRACE_CALL(); 2157 2158 int32_t res; 2159 // Notify app ops that the camera is not available 2160 mOpsCallback = new OpsCallback(this); 2161 2162 { 2163 ALOGV("%s: Start camera ops, package name = %s, client UID = %d", 2164 __FUNCTION__, String8(mClientPackageName).string(), mClientUid); 2165 } 2166 2167 mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA, 2168 mClientPackageName, mOpsCallback); 2169 res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA, 2170 mClientUid, mClientPackageName); 2171 2172 if (res == AppOpsManager::MODE_ERRORED) { 2173 ALOGI("Camera %d: Access for \"%s\" has been revoked", 2174 mCameraId, String8(mClientPackageName).string()); 2175 return PERMISSION_DENIED; 2176 } 2177 2178 if (res == AppOpsManager::MODE_IGNORED) { 2179 ALOGI("Camera %d: Access for \"%s\" has been restricted", 2180 mCameraId, String8(mClientPackageName).string()); 2181 // Return the same error as for device policy manager rejection 2182 return -EACCES; 2183 } 2184 2185 mOpsActive = true; 2186 2187 // Transition device availability listeners from PRESENT -> NOT_AVAILABLE 2188 mCameraService->updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE, 2189 String8::format("%d", mCameraId)); 2190 2191 // Transition device state to OPEN 2192 mCameraService->updateProxyDeviceState(ICameraServiceProxy::CAMERA_STATE_OPEN, 2193 String8::format("%d", mCameraId)); 2194 2195 return OK; 2196} 2197 2198status_t CameraService::BasicClient::finishCameraOps() { 2199 ATRACE_CALL(); 2200 2201 // Check if startCameraOps succeeded, and if so, finish the camera op 2202 if (mOpsActive) { 2203 // Notify app ops that the camera is available again 2204 mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid, 2205 mClientPackageName); 2206 mOpsActive = false; 2207 2208 std::initializer_list<int32_t> rejected = {ICameraServiceListener::STATUS_NOT_PRESENT, 2209 ICameraServiceListener::STATUS_ENUMERATING}; 2210 2211 // Transition to PRESENT if the camera is not in either of the rejected states 2212 mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT, 2213 String8::format("%d", mCameraId), rejected); 2214 2215 // Transition device state to CLOSED 2216 mCameraService->updateProxyDeviceState(ICameraServiceProxy::CAMERA_STATE_CLOSED, 2217 String8::format("%d", mCameraId)); 2218 2219 // Notify flashlight that a camera device is closed. 2220 mCameraService->mFlashlight->deviceClosed( 2221 String8::format("%d", mCameraId)); 2222 } 2223 // Always stop watching, even if no camera op is active 2224 if (mOpsCallback != NULL) { 2225 mAppOpsManager.stopWatchingMode(mOpsCallback); 2226 } 2227 mOpsCallback.clear(); 2228 2229 return OK; 2230} 2231 2232void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) { 2233 ATRACE_CALL(); 2234 2235 String8 name(packageName); 2236 String8 myName(mClientPackageName); 2237 2238 if (op != AppOpsManager::OP_CAMERA) { 2239 ALOGW("Unexpected app ops notification received: %d", op); 2240 return; 2241 } 2242 2243 int32_t res; 2244 res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA, 2245 mClientUid, mClientPackageName); 2246 ALOGV("checkOp returns: %d, %s ", res, 2247 res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" : 2248 res == AppOpsManager::MODE_IGNORED ? "IGNORED" : 2249 res == AppOpsManager::MODE_ERRORED ? "ERRORED" : 2250 "UNKNOWN"); 2251 2252 if (res != AppOpsManager::MODE_ALLOWED) { 2253 ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId, 2254 myName.string()); 2255 // Reset the client PID to allow server-initiated disconnect, 2256 // and to prevent further calls by client. 2257 mClientPid = getCallingPid(); 2258 CaptureResultExtras resultExtras; // a dummy result (invalid) 2259 notifyError(hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras); 2260 disconnect(); 2261 } 2262} 2263 2264// ---------------------------------------------------------------------------- 2265 2266// Provide client strong pointer for callbacks. 2267sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) { 2268 String8 cameraId = String8::format("%d", (int)(intptr_t) user); 2269 auto clientDescriptor = gCameraService->mActiveClientManager.get(cameraId); 2270 if (clientDescriptor != nullptr) { 2271 return sp<Client>{ 2272 static_cast<Client*>(clientDescriptor->getValue().get())}; 2273 } 2274 return sp<Client>{nullptr}; 2275} 2276 2277void CameraService::Client::notifyError(int32_t errorCode, 2278 const CaptureResultExtras& resultExtras) { 2279 (void) errorCode; 2280 (void) resultExtras; 2281 if (mRemoteCallback != NULL) { 2282 mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0); 2283 } else { 2284 ALOGE("mRemoteCallback is NULL!!"); 2285 } 2286} 2287 2288// NOTE: function is idempotent 2289binder::Status CameraService::Client::disconnect() { 2290 ALOGV("Client::disconnect"); 2291 return BasicClient::disconnect(); 2292} 2293 2294bool CameraService::Client::canCastToApiClient(apiLevel level) const { 2295 return level == API_1; 2296} 2297 2298CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client): 2299 mClient(client) { 2300} 2301 2302void CameraService::Client::OpsCallback::opChanged(int32_t op, 2303 const String16& packageName) { 2304 sp<BasicClient> client = mClient.promote(); 2305 if (client != NULL) { 2306 client->opChanged(op, packageName); 2307 } 2308} 2309 2310// ---------------------------------------------------------------------------- 2311// CameraState 2312// ---------------------------------------------------------------------------- 2313 2314CameraService::CameraState::CameraState(const String8& id, int cost, 2315 const std::set<String8>& conflicting) : mId(id), 2316 mStatus(ICameraServiceListener::STATUS_PRESENT), mCost(cost), mConflicting(conflicting) {} 2317 2318CameraService::CameraState::~CameraState() {} 2319 2320int32_t CameraService::CameraState::getStatus() const { 2321 Mutex::Autolock lock(mStatusLock); 2322 return mStatus; 2323} 2324 2325CameraParameters CameraService::CameraState::getShimParams() const { 2326 return mShimParams; 2327} 2328 2329void CameraService::CameraState::setShimParams(const CameraParameters& params) { 2330 mShimParams = params; 2331} 2332 2333int CameraService::CameraState::getCost() const { 2334 return mCost; 2335} 2336 2337std::set<String8> CameraService::CameraState::getConflicting() const { 2338 return mConflicting; 2339} 2340 2341String8 CameraService::CameraState::getId() const { 2342 return mId; 2343} 2344 2345// ---------------------------------------------------------------------------- 2346// ClientEventListener 2347// ---------------------------------------------------------------------------- 2348 2349void CameraService::ClientEventListener::onClientAdded( 2350 const resource_policy::ClientDescriptor<String8, 2351 sp<CameraService::BasicClient>>& descriptor) { 2352 auto basicClient = descriptor.getValue(); 2353 if (basicClient.get() != nullptr) { 2354 BatteryNotifier& notifier(BatteryNotifier::getInstance()); 2355 notifier.noteStartCamera(descriptor.getKey(), 2356 static_cast<int>(basicClient->getClientUid())); 2357 } 2358} 2359 2360void CameraService::ClientEventListener::onClientRemoved( 2361 const resource_policy::ClientDescriptor<String8, 2362 sp<CameraService::BasicClient>>& descriptor) { 2363 auto basicClient = descriptor.getValue(); 2364 if (basicClient.get() != nullptr) { 2365 BatteryNotifier& notifier(BatteryNotifier::getInstance()); 2366 notifier.noteStopCamera(descriptor.getKey(), 2367 static_cast<int>(basicClient->getClientUid())); 2368 } 2369} 2370 2371 2372// ---------------------------------------------------------------------------- 2373// CameraClientManager 2374// ---------------------------------------------------------------------------- 2375 2376CameraService::CameraClientManager::CameraClientManager() { 2377 setListener(std::make_shared<ClientEventListener>()); 2378} 2379 2380CameraService::CameraClientManager::~CameraClientManager() {} 2381 2382sp<CameraService::BasicClient> CameraService::CameraClientManager::getCameraClient( 2383 const String8& id) const { 2384 auto descriptor = get(id); 2385 if (descriptor == nullptr) { 2386 return sp<BasicClient>{nullptr}; 2387 } 2388 return descriptor->getValue(); 2389} 2390 2391String8 CameraService::CameraClientManager::toString() const { 2392 auto all = getAll(); 2393 String8 ret("["); 2394 bool hasAny = false; 2395 for (auto& i : all) { 2396 hasAny = true; 2397 String8 key = i->getKey(); 2398 int32_t cost = i->getCost(); 2399 int32_t pid = i->getOwnerId(); 2400 int32_t priority = i->getPriority(); 2401 auto conflicting = i->getConflicting(); 2402 auto clientSp = i->getValue(); 2403 String8 packageName; 2404 userid_t clientUserId = 0; 2405 if (clientSp.get() != nullptr) { 2406 packageName = String8{clientSp->getPackageName()}; 2407 uid_t clientUid = clientSp->getClientUid(); 2408 clientUserId = multiuser_get_user_id(clientUid); 2409 } 2410 ret.appendFormat("\n(Camera ID: %s, Cost: %" PRId32 ", PID: %" PRId32 ", Priority: %" 2411 PRId32 ", ", key.string(), cost, pid, priority); 2412 2413 if (clientSp.get() != nullptr) { 2414 ret.appendFormat("User Id: %d, ", clientUserId); 2415 } 2416 if (packageName.size() != 0) { 2417 ret.appendFormat("Client Package Name: %s", packageName.string()); 2418 } 2419 2420 ret.append(", Conflicting Client Devices: {"); 2421 for (auto& j : conflicting) { 2422 ret.appendFormat("%s, ", j.string()); 2423 } 2424 ret.append("})"); 2425 } 2426 if (hasAny) ret.append("\n"); 2427 ret.append("]\n"); 2428 return ret; 2429} 2430 2431CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor( 2432 const String8& key, const sp<BasicClient>& value, int32_t cost, 2433 const std::set<String8>& conflictingKeys, int32_t priority, int32_t ownerId) { 2434 2435 return std::make_shared<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>( 2436 key, value, cost, conflictingKeys, priority, ownerId); 2437} 2438 2439CameraService::DescriptorPtr CameraService::CameraClientManager::makeClientDescriptor( 2440 const sp<BasicClient>& value, const CameraService::DescriptorPtr& partial) { 2441 return makeClientDescriptor(partial->getKey(), value, partial->getCost(), 2442 partial->getConflicting(), partial->getPriority(), partial->getOwnerId()); 2443} 2444 2445// ---------------------------------------------------------------------------- 2446 2447static const int kDumpLockRetries = 50; 2448static const int kDumpLockSleep = 60000; 2449 2450static bool tryLock(Mutex& mutex) 2451{ 2452 bool locked = false; 2453 for (int i = 0; i < kDumpLockRetries; ++i) { 2454 if (mutex.tryLock() == NO_ERROR) { 2455 locked = true; 2456 break; 2457 } 2458 usleep(kDumpLockSleep); 2459 } 2460 return locked; 2461} 2462 2463status_t CameraService::dump(int fd, const Vector<String16>& args) { 2464 ATRACE_CALL(); 2465 2466 String8 result("Dump of the Camera Service:\n"); 2467 if (checkCallingPermission(String16("android.permission.DUMP")) == false) { 2468 result = result.format("Permission Denial: " 2469 "can't dump CameraService from pid=%d, uid=%d\n", 2470 getCallingPid(), 2471 getCallingUid()); 2472 write(fd, result.string(), result.size()); 2473 } else { 2474 bool locked = tryLock(mServiceLock); 2475 // failed to lock - CameraService is probably deadlocked 2476 if (!locked) { 2477 result.append("CameraService may be deadlocked\n"); 2478 write(fd, result.string(), result.size()); 2479 } 2480 2481 bool hasClient = false; 2482 if (!mModule) { 2483 result = String8::format("No camera module available!\n"); 2484 write(fd, result.string(), result.size()); 2485 2486 // Dump event log for error information 2487 dumpEventLog(fd); 2488 2489 if (locked) mServiceLock.unlock(); 2490 return NO_ERROR; 2491 } 2492 2493 result = String8::format("Camera module HAL API version: 0x%x\n", mModule->getHalApiVersion()); 2494 result.appendFormat("Camera module API version: 0x%x\n", mModule->getModuleApiVersion()); 2495 result.appendFormat("Camera module name: %s\n", mModule->getModuleName()); 2496 result.appendFormat("Camera module author: %s\n", mModule->getModuleAuthor()); 2497 result.appendFormat("Number of camera devices: %d\n", mNumberOfCameras); 2498 result.appendFormat("Number of normal camera devices: %d\n", mNumberOfNormalCameras); 2499 String8 activeClientString = mActiveClientManager.toString(); 2500 result.appendFormat("Active Camera Clients:\n%s", activeClientString.string()); 2501 result.appendFormat("Allowed users:\n%s\n", toString(mAllowedUsers).string()); 2502 2503 sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor(); 2504 if (desc == NULL) { 2505 result.appendFormat("Vendor tags left unimplemented.\n"); 2506 } else { 2507 result.appendFormat("Vendor tag definitions:\n"); 2508 } 2509 2510 write(fd, result.string(), result.size()); 2511 2512 if (desc != NULL) { 2513 desc->dump(fd, /*verbosity*/2, /*indentation*/4); 2514 } 2515 2516 dumpEventLog(fd); 2517 2518 bool stateLocked = tryLock(mCameraStatesLock); 2519 if (!stateLocked) { 2520 result = String8::format("CameraStates in use, may be deadlocked\n"); 2521 write(fd, result.string(), result.size()); 2522 } 2523 2524 for (auto& state : mCameraStates) { 2525 String8 cameraId = state.first; 2526 result = String8::format("Camera %s information:\n", cameraId.string()); 2527 camera_info info; 2528 2529 // TODO: Change getCameraInfo + HAL to use String cameraIds 2530 status_t rc = mModule->getCameraInfo(cameraIdToInt(cameraId), &info); 2531 if (rc != OK) { 2532 result.appendFormat(" Error reading static information!\n"); 2533 write(fd, result.string(), result.size()); 2534 } else { 2535 result.appendFormat(" Facing: %s\n", 2536 info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT"); 2537 result.appendFormat(" Orientation: %d\n", info.orientation); 2538 int deviceVersion; 2539 if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0) { 2540 deviceVersion = CAMERA_DEVICE_API_VERSION_1_0; 2541 } else { 2542 deviceVersion = info.device_version; 2543 } 2544 2545 auto conflicting = state.second->getConflicting(); 2546 result.appendFormat(" Resource Cost: %d\n", state.second->getCost()); 2547 result.appendFormat(" Conflicting Devices:"); 2548 for (auto& id : conflicting) { 2549 result.appendFormat(" %s", id.string()); 2550 } 2551 if (conflicting.size() == 0) { 2552 result.appendFormat(" NONE"); 2553 } 2554 result.appendFormat("\n"); 2555 2556 result.appendFormat(" Device version: %#x\n", deviceVersion); 2557 if (deviceVersion >= CAMERA_DEVICE_API_VERSION_3_0) { 2558 result.appendFormat(" Device static metadata:\n"); 2559 write(fd, result.string(), result.size()); 2560 dump_indented_camera_metadata(info.static_camera_characteristics, 2561 fd, /*verbosity*/2, /*indentation*/4); 2562 } else { 2563 write(fd, result.string(), result.size()); 2564 } 2565 2566 CameraParameters p = state.second->getShimParams(); 2567 if (!p.isEmpty()) { 2568 result = String8::format(" Camera1 API shim is using parameters:\n "); 2569 write(fd, result.string(), result.size()); 2570 p.dump(fd, args); 2571 } 2572 } 2573 2574 auto clientDescriptor = mActiveClientManager.get(cameraId); 2575 if (clientDescriptor == nullptr) { 2576 result = String8::format(" Device %s is closed, no client instance\n", 2577 cameraId.string()); 2578 write(fd, result.string(), result.size()); 2579 continue; 2580 } 2581 hasClient = true; 2582 result = String8::format(" Device %s is open. Client instance dump:\n\n", 2583 cameraId.string()); 2584 result.appendFormat("Client priority level: %d\n", clientDescriptor->getPriority()); 2585 result.appendFormat("Client PID: %d\n", clientDescriptor->getOwnerId()); 2586 2587 auto client = clientDescriptor->getValue(); 2588 result.appendFormat("Client package: %s\n", 2589 String8(client->getPackageName()).string()); 2590 write(fd, result.string(), result.size()); 2591 2592 client->dumpClient(fd, args); 2593 } 2594 2595 if (stateLocked) mCameraStatesLock.unlock(); 2596 2597 if (!hasClient) { 2598 result = String8::format("\nNo active camera clients yet.\n"); 2599 write(fd, result.string(), result.size()); 2600 } 2601 2602 if (locked) mServiceLock.unlock(); 2603 2604 // Dump camera traces if there were any 2605 write(fd, "\n", 1); 2606 camera3::CameraTraces::dump(fd, args); 2607 2608 // Process dump arguments, if any 2609 int n = args.size(); 2610 String16 verboseOption("-v"); 2611 String16 unreachableOption("--unreachable"); 2612 for (int i = 0; i < n; i++) { 2613 if (args[i] == verboseOption) { 2614 // change logging level 2615 if (i + 1 >= n) continue; 2616 String8 levelStr(args[i+1]); 2617 int level = atoi(levelStr.string()); 2618 result = String8::format("\nSetting log level to %d.\n", level); 2619 setLogLevel(level); 2620 write(fd, result.string(), result.size()); 2621 } else if (args[i] == unreachableOption) { 2622 // Dump memory analysis 2623 // TODO - should limit be an argument parameter? 2624 UnreachableMemoryInfo info; 2625 bool success = GetUnreachableMemory(info, /*limit*/ 10000); 2626 if (!success) { 2627 dprintf(fd, "\nUnable to dump unreachable memory. " 2628 "Try disabling SELinux enforcement.\n"); 2629 } else { 2630 dprintf(fd, "\nDumping unreachable memory:\n"); 2631 std::string s = info.ToString(/*log_contents*/ true); 2632 write(fd, s.c_str(), s.size()); 2633 } 2634 } 2635 } 2636 } 2637 return NO_ERROR; 2638} 2639 2640void CameraService::dumpEventLog(int fd) { 2641 String8 result = String8("\nPrior client events (most recent at top):\n"); 2642 2643 Mutex::Autolock l(mLogLock); 2644 for (const auto& msg : mEventLog) { 2645 result.appendFormat(" %s\n", msg.string()); 2646 } 2647 2648 if (mEventLog.size() == DEFAULT_EVENT_LOG_LENGTH) { 2649 result.append(" ...\n"); 2650 } else if (mEventLog.size() == 0) { 2651 result.append(" [no events yet]\n"); 2652 } 2653 result.append("\n"); 2654 2655 write(fd, result.string(), result.size()); 2656} 2657 2658void CameraService::handleTorchClientBinderDied(const wp<IBinder> &who) { 2659 Mutex::Autolock al(mTorchClientMapMutex); 2660 for (size_t i = 0; i < mTorchClientMap.size(); i++) { 2661 if (mTorchClientMap[i] == who) { 2662 // turn off the torch mode that was turned on by dead client 2663 String8 cameraId = mTorchClientMap.keyAt(i); 2664 status_t res = mFlashlight->setTorchMode(cameraId, false); 2665 if (res) { 2666 ALOGE("%s: torch client died but couldn't turn off torch: " 2667 "%s (%d)", __FUNCTION__, strerror(-res), res); 2668 return; 2669 } 2670 mTorchClientMap.removeItemsAt(i); 2671 break; 2672 } 2673 } 2674} 2675 2676/*virtual*/void CameraService::binderDied(const wp<IBinder> &who) { 2677 2678 /** 2679 * While tempting to promote the wp<IBinder> into a sp, it's actually not supported by the 2680 * binder driver 2681 */ 2682 2683 logClientDied(getCallingPid(), String8("Binder died unexpectedly")); 2684 2685 // check torch client 2686 handleTorchClientBinderDied(who); 2687 2688 // check camera device client 2689 if(!evictClientIdByRemote(who)) { 2690 ALOGV("%s: Java client's binder death already cleaned up (normal case)", __FUNCTION__); 2691 return; 2692 } 2693 2694 ALOGE("%s: Java client's binder died, removing it from the list of active clients", 2695 __FUNCTION__); 2696} 2697 2698void CameraService::updateStatus(int32_t status, const String8& cameraId) { 2699 updateStatus(status, cameraId, {}); 2700} 2701 2702void CameraService::updateStatus(int32_t status, const String8& cameraId, 2703 std::initializer_list<int32_t> rejectSourceStates) { 2704 // Do not lock mServiceLock here or can get into a deadlock from 2705 // connect() -> disconnect -> updateStatus 2706 2707 auto state = getCameraState(cameraId); 2708 2709 if (state == nullptr) { 2710 ALOGW("%s: Could not update the status for %s, no such device exists", __FUNCTION__, 2711 cameraId.string()); 2712 return; 2713 } 2714 2715 // Update the status for this camera state, then send the onStatusChangedCallbacks to each 2716 // of the listeners with both the mStatusStatus and mStatusListenerLock held 2717 state->updateStatus(status, cameraId, rejectSourceStates, [this] 2718 (const String8& cameraId, int32_t status) { 2719 2720 if (status != ICameraServiceListener::STATUS_ENUMERATING) { 2721 // Update torch status if it has a flash unit. 2722 Mutex::Autolock al(mTorchStatusMutex); 2723 int32_t torchStatus; 2724 if (getTorchStatusLocked(cameraId, &torchStatus) != 2725 NAME_NOT_FOUND) { 2726 int32_t newTorchStatus = 2727 status == ICameraServiceListener::STATUS_PRESENT ? 2728 ICameraServiceListener::TORCH_STATUS_AVAILABLE_OFF : 2729 ICameraServiceListener::TORCH_STATUS_NOT_AVAILABLE; 2730 if (torchStatus != newTorchStatus) { 2731 onTorchStatusChangedLocked(cameraId, newTorchStatus); 2732 } 2733 } 2734 } 2735 2736 Mutex::Autolock lock(mStatusListenerLock); 2737 2738 for (auto& listener : mListenerList) { 2739 // TODO: Refactor status listeners to use strings for Camera IDs and remove this. 2740 int id = cameraIdToInt(cameraId); 2741 if (id != -1) listener->onStatusChanged(status, id); 2742 } 2743 }); 2744} 2745 2746void CameraService::updateProxyDeviceState(ICameraServiceProxy::CameraState newState, 2747 const String8& cameraId) { 2748 sp<ICameraServiceProxy> proxyBinder = getCameraServiceProxy(); 2749 if (proxyBinder == nullptr) return; 2750 String16 id(cameraId); 2751 proxyBinder->notifyCameraState(id, newState); 2752} 2753 2754status_t CameraService::getTorchStatusLocked( 2755 const String8& cameraId, 2756 int32_t *status) const { 2757 if (!status) { 2758 return BAD_VALUE; 2759 } 2760 ssize_t index = mTorchStatusMap.indexOfKey(cameraId); 2761 if (index == NAME_NOT_FOUND) { 2762 // invalid camera ID or the camera doesn't have a flash unit 2763 return NAME_NOT_FOUND; 2764 } 2765 2766 *status = mTorchStatusMap.valueAt(index); 2767 return OK; 2768} 2769 2770status_t CameraService::setTorchStatusLocked(const String8& cameraId, 2771 int32_t status) { 2772 ssize_t index = mTorchStatusMap.indexOfKey(cameraId); 2773 if (index == NAME_NOT_FOUND) { 2774 return BAD_VALUE; 2775 } 2776 int32_t& item = 2777 mTorchStatusMap.editValueAt(index); 2778 item = status; 2779 2780 return OK; 2781} 2782 2783}; // namespace android 2784