| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ANDROID_SERVERS_CAMERA_CAMERASERVICE_H |
| #define ANDROID_SERVERS_CAMERA_CAMERASERVICE_H |
| |
| #include <android/hardware/BnCameraService.h> |
| #include <android/hardware/ICameraServiceListener.h> |
| |
| #include <cutils/multiuser.h> |
| #include <utils/Vector.h> |
| #include <utils/KeyedVector.h> |
| #include <binder/AppOpsManager.h> |
| #include <binder/BinderService.h> |
| #include <binder/IAppOpsCallback.h> |
| #include <camera/ICameraServiceProxy.h> |
| #include <hardware/camera.h> |
| |
| #include <camera/VendorTagDescriptor.h> |
| #include <camera/CaptureResult.h> |
| #include <camera/CameraParameters.h> |
| |
| #include "CameraFlashlight.h" |
| |
| #include "common/CameraModule.h" |
| #include "media/RingBuffer.h" |
| #include "utils/AutoConditionLock.h" |
| #include "utils/ClientManager.h" |
| |
| #include <set> |
| #include <string> |
| #include <map> |
| #include <memory> |
| #include <utility> |
| |
| namespace android { |
| |
| extern volatile int32_t gLogLevel; |
| |
| class MemoryHeapBase; |
| class MediaPlayer; |
| |
| class CameraService : |
| public BinderService<CameraService>, |
| public ::android::hardware::BnCameraService, |
| public IBinder::DeathRecipient, |
| public camera_module_callbacks_t |
| { |
| friend class BinderService<CameraService>; |
| public: |
| class Client; |
| class BasicClient; |
| |
| // The effective API level. The Camera2 API running in LEGACY mode counts as API_1. |
| enum apiLevel { |
| API_1 = 1, |
| API_2 = 2 |
| }; |
| |
| // Process state (mirrors frameworks/base/core/java/android/app/ActivityManager.java) |
| static const int PROCESS_STATE_NONEXISTENT = -1; |
| static const int PROCESS_STATE_TOP = 2; |
| static const int PROCESS_STATE_TOP_SLEEPING = 5; |
| |
| // 3 second busy timeout when other clients are connecting |
| static const nsecs_t DEFAULT_CONNECT_TIMEOUT_NS = 3000000000; |
| |
| // 1 second busy timeout when other clients are disconnecting |
| static const nsecs_t DEFAULT_DISCONNECT_TIMEOUT_NS = 1000000000; |
| |
| // Default number of messages to store in eviction log |
| static const size_t DEFAULT_EVENT_LOG_LENGTH = 100; |
| |
| // Event log ID |
| static const int SN_EVENT_LOG_ID = 0x534e4554; |
| |
| // Implementation of BinderService<T> |
| static char const* getServiceName() { return "media.camera"; } |
| |
| CameraService(); |
| virtual ~CameraService(); |
| |
| ///////////////////////////////////////////////////////////////////// |
| // HAL Callbacks |
| virtual void onDeviceStatusChanged(camera_device_status_t cameraId, |
| camera_device_status_t newStatus); |
| virtual void onTorchStatusChanged(const String8& cameraId, |
| int32_t newStatus); |
| |
| ///////////////////////////////////////////////////////////////////// |
| // ICameraService |
| virtual binder::Status getNumberOfCameras(int32_t type, int32_t* numCameras); |
| |
| virtual binder::Status getCameraInfo(int cameraId, |
| hardware::CameraInfo* cameraInfo); |
| virtual binder::Status getCameraCharacteristics(int cameraId, |
| CameraMetadata* cameraInfo); |
| virtual binder::Status getCameraVendorTagDescriptor( |
| /*out*/ |
| hardware::camera2::params::VendorTagDescriptor* desc); |
| |
| virtual binder::Status connect(const sp<hardware::ICameraClient>& cameraClient, |
| int32_t cameraId, const String16& clientPackageName, |
| int32_t clientUid, int clientPid, |
| /*out*/ |
| sp<hardware::ICamera>* device); |
| |
| virtual binder::Status connectLegacy(const sp<hardware::ICameraClient>& cameraClient, |
| int32_t cameraId, int32_t halVersion, |
| const String16& clientPackageName, int32_t clientUid, |
| /*out*/ |
| sp<hardware::ICamera>* device); |
| |
| virtual binder::Status connectDevice( |
| const sp<hardware::camera2::ICameraDeviceCallbacks>& cameraCb, int32_t cameraId, |
| const String16& clientPackageName, int32_t clientUid, |
| /*out*/ |
| sp<hardware::camera2::ICameraDeviceUser>* device); |
| |
| virtual binder::Status addListener(const sp<hardware::ICameraServiceListener>& listener); |
| virtual binder::Status removeListener( |
| const sp<hardware::ICameraServiceListener>& listener); |
| |
| virtual binder::Status getLegacyParameters( |
| int32_t cameraId, |
| /*out*/ |
| String16* parameters); |
| |
| virtual binder::Status setTorchMode(const String16& cameraId, bool enabled, |
| const sp<IBinder>& clientBinder); |
| |
| virtual binder::Status notifySystemEvent(int32_t eventId, |
| const std::vector<int32_t>& args); |
| |
| // OK = supports api of that version, -EOPNOTSUPP = does not support |
| virtual binder::Status supportsCameraApi( |
| int32_t cameraId, int32_t apiVersion, |
| /*out*/ |
| bool *isSupported); |
| |
| // Extra permissions checks |
| virtual status_t onTransact(uint32_t code, const Parcel& data, |
| Parcel* reply, uint32_t flags); |
| |
| virtual status_t dump(int fd, const Vector<String16>& args); |
| |
| ///////////////////////////////////////////////////////////////////// |
| // Client functionality |
| |
| enum sound_kind { |
| SOUND_SHUTTER = 0, |
| SOUND_RECORDING_START = 1, |
| SOUND_RECORDING_STOP = 2, |
| NUM_SOUNDS |
| }; |
| |
| void loadSound(); |
| void playSound(sound_kind kind); |
| void releaseSound(); |
| |
| /** |
| * Update the state of a given camera device (open/close/active/idle) with |
| * the camera proxy service in the system service |
| */ |
| static void updateProxyDeviceState( |
| ICameraServiceProxy::CameraState newState, |
| const String8& cameraId); |
| |
| ///////////////////////////////////////////////////////////////////// |
| // CameraDeviceFactory functionality |
| int getDeviceVersion(int cameraId, int* facing = NULL); |
| |
| ///////////////////////////////////////////////////////////////////// |
| // Shared utilities |
| static binder::Status filterGetInfoErrorCode(status_t err); |
| |
| ///////////////////////////////////////////////////////////////////// |
| // CameraClient functionality |
| |
| class BasicClient : public virtual RefBase { |
| public: |
| virtual status_t initialize(CameraModule *module) = 0; |
| virtual binder::Status disconnect(); |
| |
| // because we can't virtually inherit IInterface, which breaks |
| // virtual inheritance |
| virtual sp<IBinder> asBinderWrapper() = 0; |
| |
| // Return the remote callback binder object (e.g. ICameraDeviceCallbacks) |
| sp<IBinder> getRemote() { |
| return mRemoteBinder; |
| } |
| |
| // Disallows dumping over binder interface |
| virtual status_t dump(int fd, const Vector<String16>& args); |
| // Internal dump method to be called by CameraService |
| virtual status_t dumpClient(int fd, const Vector<String16>& args) = 0; |
| |
| // Return the package name for this client |
| virtual String16 getPackageName() const; |
| |
| // Notify client about a fatal error |
| virtual void notifyError(int32_t errorCode, |
| const CaptureResultExtras& resultExtras) = 0; |
| |
| // Get the UID of the application client using this |
| virtual uid_t getClientUid() const; |
| |
| // Get the PID of the application client using this |
| virtual int getClientPid() const; |
| |
| // Check what API level is used for this client. This is used to determine which |
| // superclass this can be cast to. |
| virtual bool canCastToApiClient(apiLevel level) const; |
| protected: |
| BasicClient(const sp<CameraService>& cameraService, |
| const sp<IBinder>& remoteCallback, |
| const String16& clientPackageName, |
| int cameraId, |
| int cameraFacing, |
| int clientPid, |
| uid_t clientUid, |
| int servicePid); |
| |
| virtual ~BasicClient(); |
| |
| // the instance is in the middle of destruction. When this is set, |
| // the instance should not be accessed from callback. |
| // CameraService's mClientLock should be acquired to access this. |
| // - subclasses should set this to true in their destructors. |
| bool mDestructionStarted; |
| |
| // these are initialized in the constructor. |
| sp<CameraService> mCameraService; // immutable after constructor |
| int mCameraId; // immutable after constructor |
| int mCameraFacing; // immutable after constructor |
| String16 mClientPackageName; // immutable after constructor |
| pid_t mClientPid; |
| uid_t mClientUid; // immutable after constructor |
| pid_t mServicePid; // immutable after constructor |
| bool mDisconnected; |
| |
| // - The app-side Binder interface to receive callbacks from us |
| sp<IBinder> mRemoteBinder; // immutable after constructor |
| |
| // permissions management |
| status_t startCameraOps(); |
| status_t finishCameraOps(); |
| |
| private: |
| AppOpsManager mAppOpsManager; |
| |
| class OpsCallback : public BnAppOpsCallback { |
| public: |
| OpsCallback(wp<BasicClient> client); |
| virtual void opChanged(int32_t op, const String16& packageName); |
| |
| private: |
| wp<BasicClient> mClient; |
| |
| }; // class OpsCallback |
| |
| sp<OpsCallback> mOpsCallback; |
| // Track whether startCameraOps was called successfully, to avoid |
| // finishing what we didn't start. |
| bool mOpsActive; |
| |
| // IAppOpsCallback interface, indirected through opListener |
| virtual void opChanged(int32_t op, const String16& packageName); |
| }; // class BasicClient |
| |
| class Client : public hardware::BnCamera, public BasicClient |
| { |
| public: |
| typedef hardware::ICameraClient TCamCallbacks; |
| |
| // ICamera interface (see ICamera for details) |
| virtual binder::Status disconnect(); |
| virtual status_t connect(const sp<hardware::ICameraClient>& client) = 0; |
| virtual status_t lock() = 0; |
| virtual status_t unlock() = 0; |
| virtual status_t setPreviewTarget(const sp<IGraphicBufferProducer>& bufferProducer)=0; |
| virtual void setPreviewCallbackFlag(int flag) = 0; |
| virtual status_t setPreviewCallbackTarget( |
| const sp<IGraphicBufferProducer>& callbackProducer) = 0; |
| virtual status_t startPreview() = 0; |
| virtual void stopPreview() = 0; |
| virtual bool previewEnabled() = 0; |
| virtual status_t setVideoBufferMode(int32_t videoBufferMode) = 0; |
| virtual status_t startRecording() = 0; |
| virtual void stopRecording() = 0; |
| virtual bool recordingEnabled() = 0; |
| virtual void releaseRecordingFrame(const sp<IMemory>& mem) = 0; |
| virtual status_t autoFocus() = 0; |
| virtual status_t cancelAutoFocus() = 0; |
| virtual status_t takePicture(int msgType) = 0; |
| virtual status_t setParameters(const String8& params) = 0; |
| virtual String8 getParameters() const = 0; |
| virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) = 0; |
| virtual status_t setVideoTarget(const sp<IGraphicBufferProducer>& bufferProducer) = 0; |
| |
| // Interface used by CameraService |
| Client(const sp<CameraService>& cameraService, |
| const sp<hardware::ICameraClient>& cameraClient, |
| const String16& clientPackageName, |
| int cameraId, |
| int cameraFacing, |
| int clientPid, |
| uid_t clientUid, |
| int servicePid); |
| ~Client(); |
| |
| // return our camera client |
| const sp<hardware::ICameraClient>& getRemoteCallback() { |
| return mRemoteCallback; |
| } |
| |
| virtual sp<IBinder> asBinderWrapper() { |
| return asBinder(this); |
| } |
| |
| virtual void notifyError(int32_t errorCode, |
| const CaptureResultExtras& resultExtras); |
| |
| // Check what API level is used for this client. This is used to determine which |
| // superclass this can be cast to. |
| virtual bool canCastToApiClient(apiLevel level) const; |
| protected: |
| // Convert client from cookie. |
| static sp<CameraService::Client> getClientFromCookie(void* user); |
| |
| // Initialized in constructor |
| |
| // - The app-side Binder interface to receive callbacks from us |
| sp<hardware::ICameraClient> mRemoteCallback; |
| |
| }; // class Client |
| |
| /** |
| * A listener class that implements the LISTENER interface for use with a ClientManager, and |
| * implements the following methods: |
| * void onClientRemoved(const ClientDescriptor<KEY, VALUE>& descriptor); |
| * void onClientAdded(const ClientDescriptor<KEY, VALUE>& descriptor); |
| */ |
| class ClientEventListener { |
| public: |
| void onClientAdded(const resource_policy::ClientDescriptor<String8, |
| sp<CameraService::BasicClient>>& descriptor); |
| void onClientRemoved(const resource_policy::ClientDescriptor<String8, |
| sp<CameraService::BasicClient>>& descriptor); |
| }; // class ClientEventListener |
| |
| typedef std::shared_ptr<resource_policy::ClientDescriptor<String8, |
| sp<CameraService::BasicClient>>> DescriptorPtr; |
| |
| /** |
| * A container class for managing active camera clients that are using HAL devices. Active |
| * clients are represented by ClientDescriptor objects that contain strong pointers to the |
| * actual BasicClient subclass binder interface implementation. |
| * |
| * This class manages the eviction behavior for the camera clients. See the parent class |
| * implementation in utils/ClientManager for the specifics of this behavior. |
| */ |
| class CameraClientManager : public resource_policy::ClientManager<String8, |
| sp<CameraService::BasicClient>, ClientEventListener> { |
| public: |
| CameraClientManager(); |
| virtual ~CameraClientManager(); |
| |
| /** |
| * Return a strong pointer to the active BasicClient for this camera ID, or an empty |
| * if none exists. |
| */ |
| sp<CameraService::BasicClient> getCameraClient(const String8& id) const; |
| |
| /** |
| * Return a string describing the current state. |
| */ |
| String8 toString() const; |
| |
| /** |
| * Make a ClientDescriptor object wrapping the given BasicClient strong pointer. |
| */ |
| static DescriptorPtr makeClientDescriptor(const String8& key, const sp<BasicClient>& value, |
| int32_t cost, const std::set<String8>& conflictingKeys, int32_t priority, |
| int32_t ownerId); |
| |
| /** |
| * Make a ClientDescriptor object wrapping the given BasicClient strong pointer with |
| * values intialized from a prior ClientDescriptor. |
| */ |
| static DescriptorPtr makeClientDescriptor(const sp<BasicClient>& value, |
| const CameraService::DescriptorPtr& partial); |
| |
| }; // class CameraClientManager |
| |
| private: |
| |
| /** |
| * Container class for the state of each logical camera device, including: ID, status, and |
| * dependencies on other devices. The mapping of camera ID -> state saved in mCameraStates |
| * represents the camera devices advertised by the HAL (and any USB devices, when we add |
| * those). |
| * |
| * This container does NOT represent an active camera client. These are represented using |
| * the ClientDescriptors stored in mActiveClientManager. |
| */ |
| class CameraState { |
| public: |
| /** |
| * Make a new CameraState and set the ID, cost, and conflicting devices using the values |
| * returned in the HAL's camera_info struct for each device. |
| */ |
| CameraState(const String8& id, int cost, const std::set<String8>& conflicting); |
| virtual ~CameraState(); |
| |
| /** |
| * Return the status for this device. |
| * |
| * This method acquires mStatusLock. |
| */ |
| int32_t getStatus() const; |
| |
| /** |
| * This function updates the status for this camera device, unless the given status |
| * is in the given list of rejected status states, and execute the function passed in |
| * with a signature onStatusUpdateLocked(const String8&, int32_t) |
| * if the status has changed. |
| * |
| * This method is idempotent, and will not result in the function passed to |
| * onStatusUpdateLocked being called more than once for the same arguments. |
| * This method aquires mStatusLock. |
| */ |
| template<class Func> |
| void updateStatus(int32_t status, const String8& cameraId, |
| std::initializer_list<int32_t> rejectSourceStates, |
| Func onStatusUpdatedLocked); |
| |
| /** |
| * Return the last set CameraParameters object generated from the information returned by |
| * the HAL for this device (or an empty CameraParameters object if none has been set). |
| */ |
| CameraParameters getShimParams() const; |
| |
| /** |
| * Set the CameraParameters for this device. |
| */ |
| void setShimParams(const CameraParameters& params); |
| |
| /** |
| * Return the resource_cost advertised by the HAL for this device. |
| */ |
| int getCost() const; |
| |
| /** |
| * Return a set of the IDs of conflicting devices advertised by the HAL for this device. |
| */ |
| std::set<String8> getConflicting() const; |
| |
| /** |
| * Return the ID of this camera device. |
| */ |
| String8 getId() const; |
| |
| private: |
| const String8 mId; |
| int32_t mStatus; // protected by mStatusLock |
| const int mCost; |
| std::set<String8> mConflicting; |
| mutable Mutex mStatusLock; |
| CameraParameters mShimParams; |
| }; // class CameraState |
| |
| // Delay-load the Camera HAL module |
| virtual void onFirstRef(); |
| |
| // Check if we can connect, before we acquire the service lock. |
| // The returned originalClientPid is the PID of the original process that wants to connect to |
| // camera. |
| // The returned clientPid is the PID of the client that directly connects to camera. |
| // originalClientPid and clientPid are usually the same except when the application uses |
| // mediaserver to connect to camera (using MediaRecorder to connect to camera). In that case, |
| // clientPid is the PID of mediaserver and originalClientPid is the PID of the application. |
| binder::Status validateConnectLocked(const String8& cameraId, const String8& clientName8, |
| /*inout*/int& clientUid, /*inout*/int& clientPid, /*out*/int& originalClientPid) const; |
| |
| // Handle active client evictions, and update service state. |
| // Only call with with mServiceLock held. |
| status_t handleEvictionsLocked(const String8& cameraId, int clientPid, |
| apiLevel effectiveApiLevel, const sp<IBinder>& remoteCallback, const String8& packageName, |
| /*out*/ |
| sp<BasicClient>* client, |
| std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>>* partial); |
| |
| // Single implementation shared between the various connect calls |
| template<class CALLBACK, class CLIENT> |
| binder::Status connectHelper(const sp<CALLBACK>& cameraCb, const String8& cameraId, |
| int halVersion, const String16& clientPackageName, |
| int clientUid, int clientPid, |
| apiLevel effectiveApiLevel, bool legacyMode, bool shimUpdateOnly, |
| /*out*/sp<CLIENT>& device); |
| |
| // Lock guarding camera service state |
| Mutex mServiceLock; |
| |
| // Condition to use with mServiceLock, used to handle simultaneous connect calls from clients |
| std::shared_ptr<WaitableMutexWrapper> mServiceLockWrapper; |
| |
| // Return NO_ERROR if the device with a give ID can be connected to |
| status_t checkIfDeviceIsUsable(const String8& cameraId) const; |
| |
| // Container for managing currently active application-layer clients |
| CameraClientManager mActiveClientManager; |
| |
| // Mapping from camera ID -> state for each device, map is protected by mCameraStatesLock |
| std::map<String8, std::shared_ptr<CameraState>> mCameraStates; |
| |
| // Mutex guarding mCameraStates map |
| mutable Mutex mCameraStatesLock; |
| |
| // Circular buffer for storing event logging for dumps |
| RingBuffer<String8> mEventLog; |
| Mutex mLogLock; |
| |
| // Currently allowed user IDs |
| std::set<userid_t> mAllowedUsers; |
| |
| /** |
| * Check camera capabilities, such as support for basic color operation |
| */ |
| int checkCameraCapabilities(int id, camera_info info, int *latestStrangeCameraId); |
| |
| /** |
| * Get the camera state for a given camera id. |
| * |
| * This acquires mCameraStatesLock. |
| */ |
| std::shared_ptr<CameraService::CameraState> getCameraState(const String8& cameraId) const; |
| |
| /** |
| * Evict client who's remote binder has died. Returns true if this client was in the active |
| * list and was disconnected. |
| * |
| * This method acquires mServiceLock. |
| */ |
| bool evictClientIdByRemote(const wp<IBinder>& cameraClient); |
| |
| /** |
| * Remove the given client from the active clients list; does not disconnect the client. |
| * |
| * This method acquires mServiceLock. |
| */ |
| void removeByClient(const BasicClient* client); |
| |
| /** |
| * Add new client to active clients list after conflicting clients have disconnected using the |
| * values set in the partial descriptor passed in to construct the actual client descriptor. |
| * This is typically called at the end of a connect call. |
| * |
| * This method must be called with mServiceLock held. |
| */ |
| void finishConnectLocked(const sp<BasicClient>& client, const DescriptorPtr& desc); |
| |
| /** |
| * Returns the integer corresponding to the given camera ID string, or -1 on failure. |
| */ |
| static int cameraIdToInt(const String8& cameraId); |
| |
| /** |
| * Remove a single client corresponding to the given camera id from the list of active clients. |
| * If none exists, return an empty strongpointer. |
| * |
| * This method must be called with mServiceLock held. |
| */ |
| sp<CameraService::BasicClient> removeClientLocked(const String8& cameraId); |
| |
| /** |
| * Handle a notification that the current device user has changed. |
| */ |
| void doUserSwitch(const std::vector<int32_t>& newUserIds); |
| |
| /** |
| * Add an event log message. |
| */ |
| void logEvent(const char* event); |
| |
| /** |
| * Add an event log message that a client has been disconnected. |
| */ |
| void logDisconnected(const char* cameraId, int clientPid, const char* clientPackage); |
| |
| /** |
| * Add an event log message that a client has been connected. |
| */ |
| void logConnected(const char* cameraId, int clientPid, const char* clientPackage); |
| |
| /** |
| * Add an event log message that a client's connect attempt has been rejected. |
| */ |
| void logRejected(const char* cameraId, int clientPid, const char* clientPackage, |
| const char* reason); |
| |
| /** |
| * Add an event log message that the current device user has been switched. |
| */ |
| void logUserSwitch(const std::set<userid_t>& oldUserIds, |
| const std::set<userid_t>& newUserIds); |
| |
| /** |
| * Add an event log message that a device has been removed by the HAL |
| */ |
| void logDeviceRemoved(const char* cameraId, const char* reason); |
| |
| /** |
| * Add an event log message that a device has been added by the HAL |
| */ |
| void logDeviceAdded(const char* cameraId, const char* reason); |
| |
| /** |
| * Add an event log message that a client has unexpectedly died. |
| */ |
| void logClientDied(int clientPid, const char* reason); |
| |
| /** |
| * Add a event log message that a serious service-level error has occured |
| * The errorCode should be one of the Android Errors |
| */ |
| void logServiceError(const char* msg, int errorCode); |
| |
| /** |
| * Dump the event log to an FD |
| */ |
| void dumpEventLog(int fd); |
| |
| int mNumberOfCameras; |
| int mNumberOfNormalCameras; |
| |
| // sounds |
| MediaPlayer* newMediaPlayer(const char *file); |
| |
| Mutex mSoundLock; |
| sp<MediaPlayer> mSoundPlayer[NUM_SOUNDS]; |
| int mSoundRef; // reference count (release all MediaPlayer when 0) |
| |
| CameraModule* mModule; |
| |
| // Guarded by mStatusListenerMutex |
| std::vector<sp<hardware::ICameraServiceListener>> mListenerList; |
| Mutex mStatusListenerLock; |
| |
| /** |
| * Update the status for the given camera id (if that device exists), and broadcast the |
| * status update to all current ICameraServiceListeners if the status has changed. Any |
| * statuses in rejectedSourceStates will be ignored. |
| * |
| * This method must be idempotent. |
| * This method acquires mStatusLock and mStatusListenerLock. |
| */ |
| void updateStatus(int32_t status, const String8& cameraId, |
| std::initializer_list<int32_t> rejectedSourceStates); |
| void updateStatus(int32_t status, const String8& cameraId); |
| |
| // flashlight control |
| sp<CameraFlashlight> mFlashlight; |
| // guard mTorchStatusMap |
| Mutex mTorchStatusMutex; |
| // guard mTorchClientMap |
| Mutex mTorchClientMapMutex; |
| // guard mTorchUidMap |
| Mutex mTorchUidMapMutex; |
| // camera id -> torch status |
| KeyedVector<String8, int32_t> mTorchStatusMap; |
| // camera id -> torch client binder |
| // only store the last client that turns on each camera's torch mode |
| KeyedVector<String8, sp<IBinder>> mTorchClientMap; |
| // camera id -> [incoming uid, current uid] pair |
| std::map<String8, std::pair<int, int>> mTorchUidMap; |
| |
| // check and handle if torch client's process has died |
| void handleTorchClientBinderDied(const wp<IBinder> &who); |
| |
| // handle torch mode status change and invoke callbacks. mTorchStatusMutex |
| // should be locked. |
| void onTorchStatusChangedLocked(const String8& cameraId, |
| int32_t newStatus); |
| |
| // get a camera's torch status. mTorchStatusMutex should be locked. |
| status_t getTorchStatusLocked(const String8 &cameraId, |
| int32_t *status) const; |
| |
| // set a camera's torch status. mTorchStatusMutex should be locked. |
| status_t setTorchStatusLocked(const String8 &cameraId, |
| int32_t status); |
| |
| // IBinder::DeathRecipient implementation |
| virtual void binderDied(const wp<IBinder> &who); |
| |
| // Helpers |
| |
| bool setUpVendorTags(); |
| |
| /** |
| * Initialize and cache the metadata used by the HAL1 shim for a given cameraId. |
| * |
| * Sets Status to a service-specific error on failure |
| */ |
| binder::Status initializeShimMetadata(int cameraId); |
| |
| /** |
| * Get the cached CameraParameters for the camera. If they haven't been |
| * cached yet, then initialize them for the first time. |
| * |
| * Sets Status to a service-specific error on failure |
| */ |
| binder::Status getLegacyParametersLazy(int cameraId, /*out*/CameraParameters* parameters); |
| |
| /** |
| * Generate the CameraCharacteristics metadata required by the Camera2 API |
| * from the available HAL1 CameraParameters and CameraInfo. |
| * |
| * Sets Status to a service-specific error on failure |
| */ |
| binder::Status generateShimMetadata(int cameraId, /*out*/CameraMetadata* cameraInfo); |
| |
| static int getCallingPid(); |
| |
| static int getCallingUid(); |
| |
| /** |
| * Get the current system time as a formatted string. |
| */ |
| static String8 getFormattedCurrentTime(); |
| |
| /** |
| * Get the camera eviction priority from the current process state given by ActivityManager. |
| */ |
| static int getCameraPriorityFromProcState(int procState); |
| |
| static binder::Status makeClient(const sp<CameraService>& cameraService, |
| const sp<IInterface>& cameraCb, const String16& packageName, int cameraId, |
| int facing, int clientPid, uid_t clientUid, int servicePid, bool legacyMode, |
| int halVersion, int deviceVersion, apiLevel effectiveApiLevel, |
| /*out*/sp<BasicClient>* client); |
| |
| status_t checkCameraAccess(const String16& opPackageName); |
| |
| static String8 toString(std::set<userid_t> intSet); |
| |
| static sp<ICameraServiceProxy> getCameraServiceProxy(); |
| static void pingCameraServiceProxy(); |
| |
| }; |
| |
| template<class Func> |
| void CameraService::CameraState::updateStatus(int32_t status, |
| const String8& cameraId, |
| std::initializer_list<int32_t> rejectSourceStates, |
| Func onStatusUpdatedLocked) { |
| Mutex::Autolock lock(mStatusLock); |
| int32_t oldStatus = mStatus; |
| mStatus = status; |
| |
| if (oldStatus == status) { |
| return; |
| } |
| |
| ALOGV("%s: Status has changed for camera ID %s from %#x to %#x", __FUNCTION__, |
| cameraId.string(), oldStatus, status); |
| |
| if (oldStatus == hardware::ICameraServiceListener::STATUS_NOT_PRESENT && |
| (status != hardware::ICameraServiceListener::STATUS_PRESENT && |
| status != hardware::ICameraServiceListener::STATUS_ENUMERATING)) { |
| |
| ALOGW("%s: From NOT_PRESENT can only transition into PRESENT or ENUMERATING", |
| __FUNCTION__); |
| mStatus = oldStatus; |
| return; |
| } |
| |
| /** |
| * Sometimes we want to conditionally do a transition. |
| * For example if a client disconnects, we want to go to PRESENT |
| * only if we weren't already in NOT_PRESENT or ENUMERATING. |
| */ |
| for (auto& rejectStatus : rejectSourceStates) { |
| if (oldStatus == rejectStatus) { |
| ALOGV("%s: Rejecting status transition for Camera ID %s, since the source " |
| "state was was in one of the bad states.", __FUNCTION__, cameraId.string()); |
| mStatus = oldStatus; |
| return; |
| } |
| } |
| |
| onStatusUpdatedLocked(cameraId, status); |
| } |
| |
| #define STATUS_ERROR(errorCode, errorString) \ |
| binder::Status::fromServiceSpecificError(errorCode, \ |
| String8::format("%s:%d: %s", __FUNCTION__, __LINE__, errorString)) |
| |
| #define STATUS_ERROR_FMT(errorCode, errorString, ...) \ |
| binder::Status::fromServiceSpecificError(errorCode, \ |
| String8::format("%s:%d: " errorString, __FUNCTION__, __LINE__, __VA_ARGS__)) |
| |
| |
| template<class CALLBACK, class CLIENT> |
| binder::Status CameraService::connectHelper(const sp<CALLBACK>& cameraCb, const String8& cameraId, |
| int halVersion, const String16& clientPackageName, int clientUid, int clientPid, |
| apiLevel effectiveApiLevel, bool legacyMode, bool shimUpdateOnly, |
| /*out*/sp<CLIENT>& device) { |
| binder::Status ret = binder::Status::ok(); |
| |
| String8 clientName8(clientPackageName); |
| |
| int originalClientPid = 0; |
| |
| ALOGI("CameraService::connect call (PID %d \"%s\", camera ID %s) for HAL version %s and " |
| "Camera API version %d", clientPid, clientName8.string(), cameraId.string(), |
| (halVersion == -1) ? "default" : std::to_string(halVersion).c_str(), |
| static_cast<int>(effectiveApiLevel)); |
| |
| sp<CLIENT> client = nullptr; |
| { |
| // Acquire mServiceLock and prevent other clients from connecting |
| std::unique_ptr<AutoConditionLock> lock = |
| AutoConditionLock::waitAndAcquire(mServiceLockWrapper, DEFAULT_CONNECT_TIMEOUT_NS); |
| |
| if (lock == nullptr) { |
| ALOGE("CameraService::connect (PID %d) rejected (too many other clients connecting)." |
| , clientPid); |
| return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE, |
| "Cannot open camera %s for \"%s\" (PID %d): Too many other clients connecting", |
| cameraId.string(), clientName8.string(), clientPid); |
| } |
| |
| // Enforce client permissions and do basic sanity checks |
| if(!(ret = validateConnectLocked(cameraId, clientName8, |
| /*inout*/clientUid, /*inout*/clientPid, /*out*/originalClientPid)).isOk()) { |
| return ret; |
| } |
| |
| // Check the shim parameters after acquiring lock, if they have already been updated and |
| // we were doing a shim update, return immediately |
| if (shimUpdateOnly) { |
| auto cameraState = getCameraState(cameraId); |
| if (cameraState != nullptr) { |
| if (!cameraState->getShimParams().isEmpty()) return ret; |
| } |
| } |
| |
| status_t err; |
| |
| sp<BasicClient> clientTmp = nullptr; |
| std::shared_ptr<resource_policy::ClientDescriptor<String8, sp<BasicClient>>> partial; |
| if ((err = handleEvictionsLocked(cameraId, originalClientPid, effectiveApiLevel, |
| IInterface::asBinder(cameraCb), clientName8, /*out*/&clientTmp, |
| /*out*/&partial)) != NO_ERROR) { |
| switch (err) { |
| case -ENODEV: |
| return STATUS_ERROR_FMT(ERROR_DISCONNECTED, |
| "No camera device with ID \"%s\" currently available", |
| cameraId.string()); |
| case -EBUSY: |
| return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE, |
| "Higher-priority client using camera, ID \"%s\" currently unavailable", |
| cameraId.string()); |
| default: |
| return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, |
| "Unexpected error %s (%d) opening camera \"%s\"", |
| strerror(-err), err, cameraId.string()); |
| } |
| } |
| |
| if (clientTmp.get() != nullptr) { |
| // Handle special case for API1 MediaRecorder where the existing client is returned |
| device = static_cast<CLIENT*>(clientTmp.get()); |
| return ret; |
| } |
| |
| // give flashlight a chance to close devices if necessary. |
| mFlashlight->prepareDeviceOpen(cameraId); |
| |
| // TODO: Update getDeviceVersion + HAL interface to use strings for Camera IDs |
| int id = cameraIdToInt(cameraId); |
| if (id == -1) { |
| ALOGE("%s: Invalid camera ID %s, cannot get device version from HAL.", __FUNCTION__, |
| cameraId.string()); |
| return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, |
| "Bad camera ID \"%s\" passed to camera open", cameraId.string()); |
| } |
| |
| int facing = -1; |
| int deviceVersion = getDeviceVersion(id, /*out*/&facing); |
| sp<BasicClient> tmp = nullptr; |
| if(!(ret = makeClient(this, cameraCb, clientPackageName, id, facing, clientPid, |
| clientUid, getpid(), legacyMode, halVersion, deviceVersion, effectiveApiLevel, |
| /*out*/&tmp)).isOk()) { |
| return ret; |
| } |
| client = static_cast<CLIENT*>(tmp.get()); |
| |
| LOG_ALWAYS_FATAL_IF(client.get() == nullptr, "%s: CameraService in invalid state", |
| __FUNCTION__); |
| |
| if ((err = client->initialize(mModule)) != OK) { |
| ALOGE("%s: Could not initialize client from HAL module.", __FUNCTION__); |
| // Errors could be from the HAL module open call or from AppOpsManager |
| switch(err) { |
| case BAD_VALUE: |
| return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, |
| "Illegal argument to HAL module for camera \"%s\"", cameraId.string()); |
| case -EBUSY: |
| return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE, |
| "Camera \"%s\" is already open", cameraId.string()); |
| case -EUSERS: |
| return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE, |
| "Too many cameras already open, cannot open camera \"%s\"", |
| cameraId.string()); |
| case PERMISSION_DENIED: |
| return STATUS_ERROR_FMT(ERROR_PERMISSION_DENIED, |
| "No permission to open camera \"%s\"", cameraId.string()); |
| case -EACCES: |
| return STATUS_ERROR_FMT(ERROR_DISABLED, |
| "Camera \"%s\" disabled by policy", cameraId.string()); |
| case -ENODEV: |
| default: |
| return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, |
| "Failed to initialize camera \"%s\": %s (%d)", cameraId.string(), |
| strerror(-err), err); |
| } |
| } |
| |
| // Update shim paremeters for legacy clients |
| if (effectiveApiLevel == API_1) { |
| // Assume we have always received a Client subclass for API1 |
| sp<Client> shimClient = reinterpret_cast<Client*>(client.get()); |
| String8 rawParams = shimClient->getParameters(); |
| CameraParameters params(rawParams); |
| |
| auto cameraState = getCameraState(cameraId); |
| if (cameraState != nullptr) { |
| cameraState->setShimParams(params); |
| } else { |
| ALOGE("%s: Cannot update shim parameters for camera %s, no such device exists.", |
| __FUNCTION__, cameraId.string()); |
| } |
| } |
| |
| if (shimUpdateOnly) { |
| // If only updating legacy shim parameters, immediately disconnect client |
| mServiceLock.unlock(); |
| client->disconnect(); |
| mServiceLock.lock(); |
| } else { |
| // Otherwise, add client to active clients list |
| finishConnectLocked(client, partial); |
| } |
| } // lock is destroyed, allow further connect calls |
| |
| // Important: release the mutex here so the client can call back into the service from its |
| // destructor (can be at the end of the call) |
| device = client; |
| return ret; |
| } |
| |
| #undef STATUS_ERROR_FMT |
| #undef STATUS_ERROR |
| |
| } // namespace android |
| |
| #endif |
