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 #ifndef ANDROID_SERVERS_CAMERA_CAMERASERVICE_H 18 #define ANDROID_SERVERS_CAMERA_CAMERASERVICE_H 19 20 #include <android/hardware/BnCameraService.h> 21 #include <android/hardware/ICameraServiceListener.h> 22 23 #include <cutils/multiuser.h> 24 #include <utils/Vector.h> 25 #include <utils/KeyedVector.h> 26 #include <binder/AppOpsManager.h> 27 #include <binder/BinderService.h> 28 #include <binder/IAppOpsCallback.h> 29 #include <camera/ICameraServiceProxy.h> 30 #include <hardware/camera.h> 31 32 #include <camera/VendorTagDescriptor.h> 33 #include <camera/CaptureResult.h> 34 #include <camera/CameraParameters.h> 35 36 #include "CameraFlashlight.h" 37 38 #include "common/CameraModule.h" 39 #include "media/RingBuffer.h" 40 #include "utils/AutoConditionLock.h" 41 #include "utils/ClientManager.h" 42 43 #include <set> 44 #include <string> 45 #include <map> 46 #include <memory> 47 #include <utility> 48 49 namespace android { 50 51 extern volatile int32_t gLogLevel; 52 53 class MemoryHeapBase; 54 class MediaPlayer; 55 56 class CameraService : 57 public BinderService<CameraService>, 58 public ::android::hardware::BnCameraService, 59 public IBinder::DeathRecipient, 60 public camera_module_callbacks_t 61 { 62 friend class BinderService<CameraService>; 63 public: 64 class Client; 65 class BasicClient; 66 67 // The effective API level. The Camera2 API running in LEGACY mode counts as API_1. 68 enum apiLevel { 69 API_1 = 1, 70 API_2 = 2 71 }; 72 73 // Process state (mirrors frameworks/base/core/java/android/app/ActivityManager.java) 74 static const int PROCESS_STATE_NONEXISTENT = -1; 75 static const int PROCESS_STATE_TOP = 2; 76 static const int PROCESS_STATE_TOP_SLEEPING = 5; 77 78 // 3 second busy timeout when other clients are connecting 79 static const nsecs_t DEFAULT_CONNECT_TIMEOUT_NS = 3000000000; 80 81 // 1 second busy timeout when other clients are disconnecting 82 static const nsecs_t DEFAULT_DISCONNECT_TIMEOUT_NS = 1000000000; 83 84 // Default number of messages to store in eviction log 85 static const size_t DEFAULT_EVENT_LOG_LENGTH = 100; 86 87 // Event log ID 88 static const int SN_EVENT_LOG_ID = 0x534e4554; 89 90 // Implementation of BinderService<T> 91 static char const* getServiceName() { return "media.camera"; } 92 93 CameraService(); 94 virtual ~CameraService(); 95 96 ///////////////////////////////////////////////////////////////////// 97 // HAL Callbacks 98 virtual void onDeviceStatusChanged(camera_device_status_t cameraId, 99 camera_device_status_t newStatus); 100 virtual void onTorchStatusChanged(const String8& cameraId, 101 int32_t newStatus); 102 103 ///////////////////////////////////////////////////////////////////// 104 // ICameraService 105 virtual binder::Status getNumberOfCameras(int32_t type, int32_t* numCameras); 106 107 virtual binder::Status getCameraInfo(int cameraId, 108 hardware::CameraInfo* cameraInfo); 109 virtual binder::Status getCameraCharacteristics(int cameraId, 110 CameraMetadata* cameraInfo); 111 virtual binder::Status getCameraVendorTagDescriptor( 112 /*out*/ 113 hardware::camera2::params::VendorTagDescriptor* desc); 114 115 virtual binder::Status connect(const sp<hardware::ICameraClient>& cameraClient, 116 int32_t cameraId, const String16& clientPackageName, 117 int32_t clientUid, int clientPid, 118 /*out*/ 119 sp<hardware::ICamera>* device); 120 121 virtual binder::Status connectLegacy(const sp<hardware::ICameraClient>& cameraClient, 122 int32_t cameraId, int32_t halVersion, 123 const String16& clientPackageName, int32_t clientUid, 124 /*out*/ 125 sp<hardware::ICamera>* device); 126 127 virtual binder::Status connectDevice( 128 const sp<hardware::camera2::ICameraDeviceCallbacks>& cameraCb, int32_t cameraId, 129 const String16& clientPackageName, int32_t clientUid, 130 /*out*/ 131 sp<hardware::camera2::ICameraDeviceUser>* device); 132 133 virtual binder::Status addListener(const sp<hardware::ICameraServiceListener>& listener); 134 virtual binder::Status removeListener( 135 const sp<hardware::ICameraServiceListener>& listener); 136 137 virtual binder::Status getLegacyParameters( 138 int32_t cameraId, 139 /*out*/ 140 String16* parameters); 141 142 virtual binder::Status setTorchMode(const String16& cameraId, bool enabled, 143 const sp<IBinder>& clientBinder); 144 145 virtual binder::Status notifySystemEvent(int32_t eventId, 146 const std::vector<int32_t>& args); 147 148 // OK = supports api of that version, -EOPNOTSUPP = does not support 149 virtual binder::Status supportsCameraApi( 150 int32_t cameraId, int32_t apiVersion, 151 /*out*/ 152 bool *isSupported); 153 154 // Extra permissions checks 155 virtual status_t onTransact(uint32_t code, const Parcel& data, 156 Parcel* reply, uint32_t flags); 157 158 virtual status_t dump(int fd, const Vector<String16>& args); 159 160 ///////////////////////////////////////////////////////////////////// 161 // Client functionality 162 163 enum sound_kind { 164 SOUND_SHUTTER = 0, 165 SOUND_RECORDING_START = 1, 166 SOUND_RECORDING_STOP = 2, 167 NUM_SOUNDS 168 }; 169 170 void loadSound(); 171 void playSound(sound_kind kind); 172 void releaseSound(); 173 174 /** 175 * Update the state of a given camera device (open/close/active/idle) with 176 * the camera proxy service in the system service 177 */ 178 static void updateProxyDeviceState( 179 ICameraServiceProxy::CameraState newState, 180 const String8& cameraId); 181 182 ///////////////////////////////////////////////////////////////////// 183 // CameraDeviceFactory functionality 184 int getDeviceVersion(int cameraId, int* facing = NULL); 185 186 ///////////////////////////////////////////////////////////////////// 187 // Shared utilities 188 static binder::Status filterGetInfoErrorCode(status_t err); 189 190 ///////////////////////////////////////////////////////////////////// 191 // CameraClient functionality 192 193 class BasicClient : public virtual RefBase { 194 public: 195 virtual status_t initialize(CameraModule *module) = 0; 196 virtual binder::Status disconnect(); 197 198 // because we can't virtually inherit IInterface, which breaks 199 // virtual inheritance 200 virtual sp<IBinder> asBinderWrapper() = 0; 201 202 // Return the remote callback binder object (e.g. ICameraDeviceCallbacks) 203 sp<IBinder> getRemote() { 204 return mRemoteBinder; 205 } 206 207 // Disallows dumping over binder interface 208 virtual status_t dump(int fd, const Vector<String16>& args); 209 // Internal dump method to be called by CameraService 210 virtual status_t dumpClient(int fd, const Vector<String16>& args) = 0; 211 212 // Return the package name for this client 213 virtual String16 getPackageName() const; 214 215 // Notify client about a fatal error 216 virtual void notifyError(int32_t errorCode, 217 const CaptureResultExtras& resultExtras) = 0; 218 219 // Get the UID of the application client using this 220 virtual uid_t getClientUid() const; 221 222 // Get the PID of the application client using this 223 virtual int getClientPid() const; 224 225 // Check what API level is used for this client. This is used to determine which 226 // superclass this can be cast to. 227 virtual bool canCastToApiClient(apiLevel level) const; 228 protected: 229 BasicClient(const sp<CameraService>& cameraService, 230 const sp<IBinder>& remoteCallback, 231 const String16& clientPackageName, 232 int cameraId, 233 int cameraFacing, 234 int clientPid, 235 uid_t clientUid, 236 int servicePid); 237 238 virtual ~BasicClient(); 239 240 // the instance is in the middle of destruction. When this is set, 241 // the instance should not be accessed from callback. 242 // CameraService's mClientLock should be acquired to access this. 243 // - subclasses should set this to true in their destructors. 244 bool mDestructionStarted; 245 246 // these are initialized in the constructor. 247 sp<CameraService> mCameraService; // immutable after constructor 248 int mCameraId; // immutable after constructor 249 int mCameraFacing; // immutable after constructor 250 String16 mClientPackageName; // immutable after constructor 251 pid_t mClientPid; 252 uid_t mClientUid; // immutable after constructor 253 pid_t mServicePid; // immutable after constructor 254 bool mDisconnected; 255 256 // - The app-side Binder interface to receive callbacks from us 257 sp<IBinder> mRemoteBinder; // immutable after constructor 258 259 // permissions management 260 status_t startCameraOps(); 261 status_t finishCameraOps(); 262 263 private: 264 AppOpsManager mAppOpsManager; 265 266 class OpsCallback : public BnAppOpsCallback { 267 public: 268 OpsCallback(wp<BasicClient> client); 269 virtual void opChanged(int32_t op, const String16& packageName); 270 271 private: 272 wp<BasicClient> mClient; 273 274 }; // class OpsCallback 275 276 sp<OpsCallback> mOpsCallback; 277 // Track whether startCameraOps was called successfully, to avoid 278 // finishing what we didn't start. 279 bool mOpsActive; 280 281 // IAppOpsCallback interface, indirected through opListener 282 virtual void opChanged(int32_t op, const String16& packageName); 283 }; // class BasicClient 284 285 class Client : public hardware::BnCamera, public BasicClient 286 { 287 public: 288 typedef hardware::ICameraClient TCamCallbacks; 289 290 // ICamera interface (see ICamera for details) 291 virtual binder::Status disconnect(); 292 virtual status_t connect(const sp<hardware::ICameraClient>& client) = 0; 293 virtual status_t lock() = 0; 294 virtual status_t unlock() = 0; 295 virtual status_t setPreviewTarget(const sp<IGraphicBufferProducer>& bufferProducer)=0; 296 virtual void setPreviewCallbackFlag(int flag) = 0; 297 virtual status_t setPreviewCallbackTarget( 298 const sp<IGraphicBufferProducer>& callbackProducer) = 0; 299 virtual status_t startPreview() = 0; 300 virtual void stopPreview() = 0; 301 virtual bool previewEnabled() = 0; 302 virtual status_t setVideoBufferMode(int32_t videoBufferMode) = 0; 303 virtual status_t startRecording() = 0; 304 virtual void stopRecording() = 0; 305 virtual bool recordingEnabled() = 0; 306 virtual void releaseRecordingFrame(const sp<IMemory>& mem) = 0; 307 virtual status_t autoFocus() = 0; 308 virtual status_t cancelAutoFocus() = 0; 309 virtual status_t takePicture(int msgType) = 0; 310 virtual status_t setParameters(const String8& params) = 0; 311 virtual String8 getParameters() const = 0; 312 virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) = 0; 313 virtual status_t setVideoTarget(const sp<IGraphicBufferProducer>& bufferProducer) = 0; 314 315 // Interface used by CameraService 316 Client(const sp<CameraService>& cameraService, 317 const sp<hardware::ICameraClient>& cameraClient, 318 const String16& clientPackageName, 319 int cameraId, 320 int cameraFacing, 321 int clientPid, 322 uid_t clientUid, 323 int servicePid); 324 ~Client(); 325 326 // return our camera client 327 const sp<hardware::ICameraClient>& getRemoteCallback() { 328 return mRemoteCallback; 329 } 330 331 virtual sp<IBinder> asBinderWrapper() { 332 return asBinder(this); 333 } 334 335 virtual void notifyError(int32_t errorCode, 336 const CaptureResultExtras& resultExtras); 337 338 // Check what API level is used for this client. This is used to determine which 339 // superclass this can be cast to. 340 virtual bool canCastToApiClient(apiLevel level) const; 341 protected: 342 // Convert client from cookie. 343 static sp<CameraService::Client> getClientFromCookie(void* user); 344 345 // Initialized in constructor 346 347 // - The app-side Binder interface to receive callbacks from us 348 sp<hardware::ICameraClient> mRemoteCallback; 349 350 }; // class Client 351 352 /** 353 * A listener class that implements the LISTENER interface for use with a ClientManager, and 354 * implements the following methods: 355 * void onClientRemoved(const ClientDescriptor<KEY, VALUE>& descriptor); 356 * void onClientAdded(const ClientDescriptor<KEY, VALUE>& descriptor); 357 */ 358 class ClientEventListener { 359 public: 360 void onClientAdded(const resource_policy::ClientDescriptor<String8, 361 sp<CameraService::BasicClient>>& descriptor); 362 void onClientRemoved(const resource_policy::ClientDescriptor<String8, 363 sp<CameraService::BasicClient>>& descriptor); 364 }; // class ClientEventListener 365 366 typedef std::shared_ptr<resource_policy::ClientDescriptor<String8, 367 sp<CameraService::BasicClient>>> DescriptorPtr; 368 369 /** 370 * A container class for managing active camera clients that are using HAL devices. Active 371 * clients are represented by ClientDescriptor objects that contain strong pointers to the 372 * actual BasicClient subclass binder interface implementation. 373 * 374 * This class manages the eviction behavior for the camera clients. See the parent class 375 * implementation in utils/ClientManager for the specifics of this behavior. 376 */ 377 class CameraClientManager : public resource_policy::ClientManager<String8, 378 sp<CameraService::BasicClient>, ClientEventListener> { 379 public: 380 CameraClientManager(); 381 virtual ~CameraClientManager(); 382 383 /** 384 * Return a strong pointer to the active BasicClient for this camera ID, or an empty 385 * if none exists. 386 */ 387 sp<CameraService::BasicClient> getCameraClient(const String8& id) const; 388 389 /** 390 * Return a string describing the current state. 391 */ 392 String8 toString() const; 393 394 /** 395 * Make a ClientDescriptor object wrapping the given BasicClient strong pointer. 396 */ 397 static DescriptorPtr makeClientDescriptor(const String8& key, const sp<BasicClient>& value, 398 int32_t cost, const std::set<String8>& conflictingKeys, int32_t priority, 399 int32_t ownerId); 400 401 /** 402 * Make a ClientDescriptor object wrapping the given BasicClient strong pointer with 403 * values intialized from a prior ClientDescriptor. 404 */ 405 static DescriptorPtr makeClientDescriptor(const sp<BasicClient>& value, 406 const CameraService::DescriptorPtr& partial); 407 408 }; // class CameraClientManager 409 410 private: 411 412 /** 413 * Container class for the state of each logical camera device, including: ID, status, and 414 * dependencies on other devices. The mapping of camera ID -> state saved in mCameraStates 415 * represents the camera devices advertised by the HAL (and any USB devices, when we add 416 * those). 417 * 418 * This container does NOT represent an active camera client. These are represented using 419 * the ClientDescriptors stored in mActiveClientManager. 420 */ 421 class CameraState { 422 public: 423 /** 424 * Make a new CameraState and set the ID, cost, and conflicting devices using the values 425 * returned in the HAL's camera_info struct for each device. 426 */ 427 CameraState(const String8& id, int cost, const std::set<String8>& conflicting); 428 virtual ~CameraState(); 429 430 /** 431 * Return the status for this device. 432 * 433 * This method acquires mStatusLock. 434 */ 435 int32_t getStatus() const; 436 437 /** 438 * This function updates the status for this camera device, unless the given status 439 * is in the given list of rejected status states, and execute the function passed in 440 * with a signature onStatusUpdateLocked(const String8&, int32_t) 441 * if the status has changed. 442 * 443 * This method is idempotent, and will not result in the function passed to 444 * onStatusUpdateLocked being called more than once for the same arguments. 445 * This method aquires mStatusLock. 446 */ 447 template<class Func> 448 void updateStatus(int32_t status, const String8& cameraId, 449 std::initializer_list<int32_t> rejectSourceStates, 450 Func onStatusUpdatedLocked); 451 452 /** 453 * Return the last set CameraParameters object generated from the information returned by 454 * the HAL for this device (or an empty CameraParameters object if none has been set). 455 */ 456 CameraParameters getShimParams() const; 457 458 /** 459 * Set the CameraParameters for this device. 460 */ 461 void setShimParams(const CameraParameters& params); 462 463 /** 464 * Return the resource_cost advertised by the HAL for this device. 465 */ 466 int getCost() const; 467 468 /** 469 * Return a set of the IDs of conflicting devices advertised by the HAL for this device. 470 */ 471 std::set<String8> getConflicting() const; 472 473 /** 474 * Return the ID of this camera device. 475 */ 476 String8 getId() const; 477 478 private: 479 const String8 mId; 480 int32_t mStatus; // protected by mStatusLock 481 const int mCost; 482 std::set<String8> mConflicting; 483 mutable Mutex mStatusLock; 484 CameraParameters mShimParams; 485 }; // class CameraState 486 487 // Delay-load the Camera HAL module 488 virtual void onFirstRef(); 489 490 // Check if we can connect, before we acquire the service lock. 491 // The returned originalClientPid is the PID of the original process that wants to connect to 492 // camera. 493 // The returned clientPid is the PID of the client that directly connects to camera. 494 // originalClientPid and clientPid are usually the same except when the application uses 495 // mediaserver to connect to camera (using MediaRecorder to connect to camera). In that case, 496 // clientPid is the PID of mediaserver and originalClientPid is the PID of the application. 497 binder::Status validateConnectLocked(const String8& cameraId, const String8& clientName8, 498 /*inout*/int& clientUid, /*inout*/int& clientPid, /*out*/int& originalClientPid) const; 499 500 // Handle active client evictions, and update service state. 501 // Only call with with mServiceLock held. 502 status_t handleEvictionsLocked(const String8& cameraId, int clientPid, 503 apiLevel effectiveApiLevel, const sp<IBinder>& remoteCallback, const String8& packageName, 504 /*out*/ 505 sp<BasicClient>* client, 506 std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>* partial); 507 508 // Single implementation shared between the various connect calls 509 template<class CALLBACK, class CLIENT> 510 binder::Status connectHelper(const sp<CALLBACK>& cameraCb, const String8& cameraId, 511 int halVersion, const String16& clientPackageName, 512 int clientUid, int clientPid, 513 apiLevel effectiveApiLevel, bool legacyMode, bool shimUpdateOnly, 514 /*out*/sp<CLIENT>& device); 515 516 // Lock guarding camera service state 517 Mutex mServiceLock; 518 519 // Condition to use with mServiceLock, used to handle simultaneous connect calls from clients 520 std::shared_ptr<WaitableMutexWrapper> mServiceLockWrapper; 521 522 // Return NO_ERROR if the device with a give ID can be connected to 523 status_t checkIfDeviceIsUsable(const String8& cameraId) const; 524 525 // Container for managing currently active application-layer clients 526 CameraClientManager mActiveClientManager; 527 528 // Mapping from camera ID -> state for each device, map is protected by mCameraStatesLock 529 std::map<String8, std::shared_ptr<CameraState>> mCameraStates; 530 531 // Mutex guarding mCameraStates map 532 mutable Mutex mCameraStatesLock; 533 534 // Circular buffer for storing event logging for dumps 535 RingBuffer<String8> mEventLog; 536 Mutex mLogLock; 537 538 // Currently allowed user IDs 539 std::set<userid_t> mAllowedUsers; 540 541 /** 542 * Check camera capabilities, such as support for basic color operation 543 */ 544 int checkCameraCapabilities(int id, camera_info info, int *latestStrangeCameraId); 545 546 /** 547 * Get the camera state for a given camera id. 548 * 549 * This acquires mCameraStatesLock. 550 */ 551 std::shared_ptr<CameraService::CameraState> getCameraState(const String8& cameraId) const; 552 553 /** 554 * Evict client who's remote binder has died. Returns true if this client was in the active 555 * list and was disconnected. 556 * 557 * This method acquires mServiceLock. 558 */ 559 bool evictClientIdByRemote(const wp<IBinder>& cameraClient); 560 561 /** 562 * Remove the given client from the active clients list; does not disconnect the client. 563 * 564 * This method acquires mServiceLock. 565 */ 566 void removeByClient(const BasicClient* client); 567 568 /** 569 * Add new client to active clients list after conflicting clients have disconnected using the 570 * values set in the partial descriptor passed in to construct the actual client descriptor. 571 * This is typically called at the end of a connect call. 572 * 573 * This method must be called with mServiceLock held. 574 */ 575 void finishConnectLocked(const sp<BasicClient>& client, const DescriptorPtr& desc); 576 577 /** 578 * Returns the integer corresponding to the given camera ID string, or -1 on failure. 579 */ 580 static int cameraIdToInt(const String8& cameraId); 581 582 /** 583 * Remove a single client corresponding to the given camera id from the list of active clients. 584 * If none exists, return an empty strongpointer. 585 * 586 * This method must be called with mServiceLock held. 587 */ 588 sp<CameraService::BasicClient> removeClientLocked(const String8& cameraId); 589 590 /** 591 * Handle a notification that the current device user has changed. 592 */ 593 void doUserSwitch(const std::vector<int32_t>& newUserIds); 594 595 /** 596 * Add an event log message. 597 */ 598 void logEvent(const char* event); 599 600 /** 601 * Add an event log message that a client has been disconnected. 602 */ 603 void logDisconnected(const char* cameraId, int clientPid, const char* clientPackage); 604 605 /** 606 * Add an event log message that a client has been connected. 607 */ 608 void logConnected(const char* cameraId, int clientPid, const char* clientPackage); 609 610 /** 611 * Add an event log message that a client's connect attempt has been rejected. 612 */ 613 void logRejected(const char* cameraId, int clientPid, const char* clientPackage, 614 const char* reason); 615 616 /** 617 * Add an event log message that the current device user has been switched. 618 */ 619 void logUserSwitch(const std::set<userid_t>& oldUserIds, 620 const std::set<userid_t>& newUserIds); 621 622 /** 623 * Add an event log message that a device has been removed by the HAL 624 */ 625 void logDeviceRemoved(const char* cameraId, const char* reason); 626 627 /** 628 * Add an event log message that a device has been added by the HAL 629 */ 630 void logDeviceAdded(const char* cameraId, const char* reason); 631 632 /** 633 * Add an event log message that a client has unexpectedly died. 634 */ 635 void logClientDied(int clientPid, const char* reason); 636 637 /** 638 * Add a event log message that a serious service-level error has occured 639 * The errorCode should be one of the Android Errors 640 */ 641 void logServiceError(const char* msg, int errorCode); 642 643 /** 644 * Dump the event log to an FD 645 */ 646 void dumpEventLog(int fd); 647 648 int mNumberOfCameras; 649 int mNumberOfNormalCameras; 650 651 // sounds 652 MediaPlayer* newMediaPlayer(const char *file); 653 654 Mutex mSoundLock; 655 sp<MediaPlayer> mSoundPlayer[NUM_SOUNDS]; 656 int mSoundRef; // reference count (release all MediaPlayer when 0) 657 658 CameraModule* mModule; 659 660 // Guarded by mStatusListenerMutex 661 std::vector<sp<hardware::ICameraServiceListener>> mListenerList; 662 Mutex mStatusListenerLock; 663 664 /** 665 * Update the status for the given camera id (if that device exists), and broadcast the 666 * status update to all current ICameraServiceListeners if the status has changed. Any 667 * statuses in rejectedSourceStates will be ignored. 668 * 669 * This method must be idempotent. 670 * This method acquires mStatusLock and mStatusListenerLock. 671 */ 672 void updateStatus(int32_t status, const String8& cameraId, 673 std::initializer_list<int32_t> rejectedSourceStates); 674 void updateStatus(int32_t status, const String8& cameraId); 675 676 // flashlight control 677 sp<CameraFlashlight> mFlashlight; 678 // guard mTorchStatusMap 679 Mutex mTorchStatusMutex; 680 // guard mTorchClientMap 681 Mutex mTorchClientMapMutex; 682 // guard mTorchUidMap 683 Mutex mTorchUidMapMutex; 684 // camera id -> torch status 685 KeyedVector<String8, int32_t> mTorchStatusMap; 686 // camera id -> torch client binder 687 // only store the last client that turns on each camera's torch mode 688 KeyedVector<String8, sp<IBinder>> mTorchClientMap; 689 // camera id -> [incoming uid, current uid] pair 690 std::map<String8, std::pair<int, int>> mTorchUidMap; 691 692 // check and handle if torch client's process has died 693 void handleTorchClientBinderDied(const wp<IBinder> &who); 694 695 // handle torch mode status change and invoke callbacks. mTorchStatusMutex 696 // should be locked. 697 void onTorchStatusChangedLocked(const String8& cameraId, 698 int32_t newStatus); 699 700 // get a camera's torch status. mTorchStatusMutex should be locked. 701 status_t getTorchStatusLocked(const String8 &cameraId, 702 int32_t *status) const; 703 704 // set a camera's torch status. mTorchStatusMutex should be locked. 705 status_t setTorchStatusLocked(const String8 &cameraId, 706 int32_t status); 707 708 // IBinder::DeathRecipient implementation 709 virtual void binderDied(const wp<IBinder> &who); 710 711 // Helpers 712 713 bool setUpVendorTags(); 714 715 /** 716 * Initialize and cache the metadata used by the HAL1 shim for a given cameraId. 717 * 718 * Sets Status to a service-specific error on failure 719 */ 720 binder::Status initializeShimMetadata(int cameraId); 721 722 /** 723 * Get the cached CameraParameters for the camera. If they haven't been 724 * cached yet, then initialize them for the first time. 725 * 726 * Sets Status to a service-specific error on failure 727 */ 728 binder::Status getLegacyParametersLazy(int cameraId, /*out*/CameraParameters* parameters); 729 730 /** 731 * Generate the CameraCharacteristics metadata required by the Camera2 API 732 * from the available HAL1 CameraParameters and CameraInfo. 733 * 734 * Sets Status to a service-specific error on failure 735 */ 736 binder::Status generateShimMetadata(int cameraId, /*out*/CameraMetadata* cameraInfo); 737 738 static int getCallingPid(); 739 740 static int getCallingUid(); 741 742 /** 743 * Get the current system time as a formatted string. 744 */ 745 static String8 getFormattedCurrentTime(); 746 747 /** 748 * Get the camera eviction priority from the current process state given by ActivityManager. 749 */ 750 static int getCameraPriorityFromProcState(int procState); 751 752 static binder::Status makeClient(const sp<CameraService>& cameraService, 753 const sp<IInterface>& cameraCb, const String16& packageName, int cameraId, 754 int facing, int clientPid, uid_t clientUid, int servicePid, bool legacyMode, 755 int halVersion, int deviceVersion, apiLevel effectiveApiLevel, 756 /*out*/sp<BasicClient>* client); 757 758 status_t checkCameraAccess(const String16& opPackageName); 759 760 static String8 toString(std::set<userid_t> intSet); 761 762 static sp<ICameraServiceProxy> getCameraServiceProxy(); 763 static void pingCameraServiceProxy(); 764 765 }; 766 767 template<class Func> 768 void CameraService::CameraState::updateStatus(int32_t status, 769 const String8& cameraId, 770 std::initializer_list<int32_t> rejectSourceStates, 771 Func onStatusUpdatedLocked) { 772 Mutex::Autolock lock(mStatusLock); 773 int32_t oldStatus = mStatus; 774 mStatus = status; 775 776 if (oldStatus == status) { 777 return; 778 } 779 780 ALOGV("%s: Status has changed for camera ID %s from %#x to %#x", __FUNCTION__, 781 cameraId.string(), oldStatus, status); 782 783 if (oldStatus == hardware::ICameraServiceListener::STATUS_NOT_PRESENT && 784 (status != hardware::ICameraServiceListener::STATUS_PRESENT && 785 status != hardware::ICameraServiceListener::STATUS_ENUMERATING)) { 786 787 ALOGW("%s: From NOT_PRESENT can only transition into PRESENT or ENUMERATING", 788 __FUNCTION__); 789 mStatus = oldStatus; 790 return; 791 } 792 793 /** 794 * Sometimes we want to conditionally do a transition. 795 * For example if a client disconnects, we want to go to PRESENT 796 * only if we weren't already in NOT_PRESENT or ENUMERATING. 797 */ 798 for (auto& rejectStatus : rejectSourceStates) { 799 if (oldStatus == rejectStatus) { 800 ALOGV("%s: Rejecting status transition for Camera ID %s, since the source " 801 "state was was in one of the bad states.", __FUNCTION__, cameraId.string()); 802 mStatus = oldStatus; 803 return; 804 } 805 } 806 807 onStatusUpdatedLocked(cameraId, status); 808 } 809 810 #define STATUS_ERROR(errorCode, errorString) \ 811 binder::Status::fromServiceSpecificError(errorCode, \ 812 String8::format("%s:%d: %s", __FUNCTION__, __LINE__, errorString)) 813 814 #define STATUS_ERROR_FMT(errorCode, errorString, ...) \ 815 binder::Status::fromServiceSpecificError(errorCode, \ 816 String8::format("%s:%d: " errorString, __FUNCTION__, __LINE__, __VA_ARGS__)) 817 818 819 template<class CALLBACK, class CLIENT> 820 binder::Status CameraService::connectHelper(const sp<CALLBACK>& cameraCb, const String8& cameraId, 821 int halVersion, const String16& clientPackageName, int clientUid, int clientPid, 822 apiLevel effectiveApiLevel, bool legacyMode, bool shimUpdateOnly, 823 /*out*/sp<CLIENT>& device) { 824 binder::Status ret = binder::Status::ok(); 825 826 String8 clientName8(clientPackageName); 827 828 int originalClientPid = 0; 829 830 ALOGI("CameraService::connect call (PID %d \"%s\", camera ID %s) for HAL version %s and " 831 "Camera API version %d", clientPid, clientName8.string(), cameraId.string(), 832 (halVersion == -1) ? "default" : std::to_string(halVersion).c_str(), 833 static_cast<int>(effectiveApiLevel)); 834 835 sp<CLIENT> client = nullptr; 836 { 837 // Acquire mServiceLock and prevent other clients from connecting 838 std::unique_ptr<AutoConditionLock> lock = 839 AutoConditionLock::waitAndAcquire(mServiceLockWrapper, DEFAULT_CONNECT_TIMEOUT_NS); 840 841 if (lock == nullptr) { 842 ALOGE("CameraService::connect (PID %d) rejected (too many other clients connecting)." 843 , clientPid); 844 return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE, 845 "Cannot open camera %s for \"%s\" (PID %d): Too many other clients connecting", 846 cameraId.string(), clientName8.string(), clientPid); 847 } 848 849 // Enforce client permissions and do basic sanity checks 850 if(!(ret = validateConnectLocked(cameraId, clientName8, 851 /*inout*/clientUid, /*inout*/clientPid, /*out*/originalClientPid)).isOk()) { 852 return ret; 853 } 854 855 // Check the shim parameters after acquiring lock, if they have already been updated and 856 // we were doing a shim update, return immediately 857 if (shimUpdateOnly) { 858 auto cameraState = getCameraState(cameraId); 859 if (cameraState != nullptr) { 860 if (!cameraState->getShimParams().isEmpty()) return ret; 861 } 862 } 863 864 status_t err; 865 866 sp<BasicClient> clientTmp = nullptr; 867 std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>> partial; 868 if ((err = handleEvictionsLocked(cameraId, originalClientPid, effectiveApiLevel, 869 IInterface::asBinder(cameraCb), clientName8, /*out*/&clientTmp, 870 /*out*/&partial)) != NO_ERROR) { 871 switch (err) { 872 case -ENODEV: 873 return STATUS_ERROR_FMT(ERROR_DISCONNECTED, 874 "No camera device with ID \"%s\" currently available", 875 cameraId.string()); 876 case -EBUSY: 877 return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE, 878 "Higher-priority client using camera, ID \"%s\" currently unavailable", 879 cameraId.string()); 880 default: 881 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 882 "Unexpected error %s (%d) opening camera \"%s\"", 883 strerror(-err), err, cameraId.string()); 884 } 885 } 886 887 if (clientTmp.get() != nullptr) { 888 // Handle special case for API1 MediaRecorder where the existing client is returned 889 device = static_cast<CLIENT*>(clientTmp.get()); 890 return ret; 891 } 892 893 // give flashlight a chance to close devices if necessary. 894 mFlashlight->prepareDeviceOpen(cameraId); 895 896 // TODO: Update getDeviceVersion + HAL interface to use strings for Camera IDs 897 int id = cameraIdToInt(cameraId); 898 if (id == -1) { 899 ALOGE("%s: Invalid camera ID %s, cannot get device version from HAL.", __FUNCTION__, 900 cameraId.string()); 901 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 902 "Bad camera ID \"%s\" passed to camera open", cameraId.string()); 903 } 904 905 int facing = -1; 906 int deviceVersion = getDeviceVersion(id, /*out*/&facing); 907 sp<BasicClient> tmp = nullptr; 908 if(!(ret = makeClient(this, cameraCb, clientPackageName, id, facing, clientPid, 909 clientUid, getpid(), legacyMode, halVersion, deviceVersion, effectiveApiLevel, 910 /*out*/&tmp)).isOk()) { 911 return ret; 912 } 913 client = static_cast<CLIENT*>(tmp.get()); 914 915 LOG_ALWAYS_FATAL_IF(client.get() == nullptr, "%s: CameraService in invalid state", 916 __FUNCTION__); 917 918 if ((err = client->initialize(mModule)) != OK) { 919 ALOGE("%s: Could not initialize client from HAL module.", __FUNCTION__); 920 // Errors could be from the HAL module open call or from AppOpsManager 921 switch(err) { 922 case BAD_VALUE: 923 return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, 924 "Illegal argument to HAL module for camera \"%s\"", cameraId.string()); 925 case -EBUSY: 926 return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE, 927 "Camera \"%s\" is already open", cameraId.string()); 928 case -EUSERS: 929 return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE, 930 "Too many cameras already open, cannot open camera \"%s\"", 931 cameraId.string()); 932 case PERMISSION_DENIED: 933 return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, 934 "No permission to open camera \"%s\"", cameraId.string()); 935 case -EACCES: 936 return STATUS_ERROR_FMT(ERROR_DISABLED, 937 "Camera \"%s\" disabled by policy", cameraId.string()); 938 case -ENODEV: 939 default: 940 return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, 941 "Failed to initialize camera \"%s\": %s (%d)", cameraId.string(), 942 strerror(-err), err); 943 } 944 } 945 946 // Update shim paremeters for legacy clients 947 if (effectiveApiLevel == API_1) { 948 // Assume we have always received a Client subclass for API1 949 sp<Client> shimClient = reinterpret_cast<Client*>(client.get()); 950 String8 rawParams = shimClient->getParameters(); 951 CameraParameters params(rawParams); 952 953 auto cameraState = getCameraState(cameraId); 954 if (cameraState != nullptr) { 955 cameraState->setShimParams(params); 956 } else { 957 ALOGE("%s: Cannot update shim parameters for camera %s, no such device exists.", 958 __FUNCTION__, cameraId.string()); 959 } 960 } 961 962 if (shimUpdateOnly) { 963 // If only updating legacy shim parameters, immediately disconnect client 964 mServiceLock.unlock(); 965 client->disconnect(); 966 mServiceLock.lock(); 967 } else { 968 // Otherwise, add client to active clients list 969 finishConnectLocked(client, partial); 970 } 971 } // lock is destroyed, allow further connect calls 972 973 // Important: release the mutex here so the client can call back into the service from its 974 // destructor (can be at the end of the call) 975 device = client; 976 return ret; 977 } 978 979 #undef STATUS_ERROR_FMT 980 #undef STATUS_ERROR 981 982 } // namespace android 983 984 #endif 985
