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/*
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**
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** Copyright (C) 2008, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#ifndef ANDROID_SERVERS_CAMERA_CAMERASERVICE_H
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#define ANDROID_SERVERS_CAMERA_CAMERASERVICE_H
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#include <utils/Vector.h>
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#include <binder/AppOpsManager.h>
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#include <binder/BinderService.h>
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#include <binder/IAppOpsCallback.h>
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#include <camera/ICameraService.h>
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#include <hardware/camera.h>
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#include <camera/ICamera.h>
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#include <camera/ICameraClient.h>
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#include <camera/IProCameraUser.h>
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#include <camera/IProCameraCallbacks.h>
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#include <camera/camera2/ICameraDeviceUser.h>
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#include <camera/camera2/ICameraDeviceCallbacks.h>
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#include <camera/ICameraServiceListener.h>
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/* This needs to be increased if we can have more cameras */
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#define MAX_CAMERAS 2
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namespace android {
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extern volatile int32_t gLogLevel;
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class MemoryHeapBase;
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class MediaPlayer;
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class CameraService :
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public BinderService<CameraService>,
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public BnCameraService,
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public IBinder::DeathRecipient,
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public camera_module_callbacks_t
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{
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friend class BinderService<CameraService>;
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public:
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class Client;
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class BasicClient;
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// Implementation of BinderService<T>
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static char const* getServiceName() { return "media.camera"; }
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CameraService();
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virtual ~CameraService();
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/////////////////////////////////////////////////////////////////////
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// HAL Callbacks
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virtual void onDeviceStatusChanged(int cameraId,
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int newStatus);
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/////////////////////////////////////////////////////////////////////
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// ICameraService
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virtual int32_t getNumberOfCameras();
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virtual status_t getCameraInfo(int cameraId,
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struct CameraInfo* cameraInfo);
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virtual status_t getCameraCharacteristics(int cameraId,
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CameraMetadata* cameraInfo);
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virtual status_t connect(const sp<ICameraClient>& cameraClient, int cameraId,
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const String16& clientPackageName, int clientUid,
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/*out*/
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sp<ICamera>& device);
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virtual status_t connectPro(const sp<IProCameraCallbacks>& cameraCb,
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int cameraId, const String16& clientPackageName, int clientUid,
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/*out*/
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sp<IProCameraUser>& device);
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virtual status_t connectDevice(
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const sp<ICameraDeviceCallbacks>& cameraCb,
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int cameraId,
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const String16& clientPackageName,
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int clientUid,
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/*out*/
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sp<ICameraDeviceUser>& device);
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virtual status_t addListener(const sp<ICameraServiceListener>& listener);
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virtual status_t removeListener(
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const sp<ICameraServiceListener>& listener);
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// Extra permissions checks
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virtual status_t onTransact(uint32_t code, const Parcel& data,
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Parcel* reply, uint32_t flags);
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virtual status_t dump(int fd, const Vector<String16>& args);
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/////////////////////////////////////////////////////////////////////
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// Client functionality
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virtual void removeClientByRemote(const wp<IBinder>& remoteBinder);
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enum sound_kind {
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SOUND_SHUTTER = 0,
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SOUND_RECORDING = 1,
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NUM_SOUNDS
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};
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void loadSound();
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void playSound(sound_kind kind);
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void releaseSound();
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/////////////////////////////////////////////////////////////////////
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// CameraDeviceFactory functionality
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int getDeviceVersion(int cameraId, int* facing = NULL);
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/////////////////////////////////////////////////////////////////////
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// CameraClient functionality
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// returns plain pointer of client. Note that mClientLock should be acquired to
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// prevent the client from destruction. The result can be NULL.
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virtual BasicClient* getClientByIdUnsafe(int cameraId);
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virtual Mutex* getClientLockById(int cameraId);
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class BasicClient : public virtual RefBase {
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public:
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virtual status_t initialize(camera_module_t *module) = 0;
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virtual void disconnect() = 0;
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// because we can't virtually inherit IInterface, which breaks
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// virtual inheritance
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virtual sp<IBinder> asBinderWrapper() = 0;
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// Return the remote callback binder object (e.g. IProCameraCallbacks)
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sp<IBinder> getRemote() {
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return mRemoteBinder;
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}
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virtual status_t dump(int fd, const Vector<String16>& args) = 0;
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protected:
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BasicClient(const sp<CameraService>& cameraService,
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const sp<IBinder>& remoteCallback,
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const String16& clientPackageName,
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int cameraId,
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int cameraFacing,
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int clientPid,
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uid_t clientUid,
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int servicePid);
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virtual ~BasicClient();
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// the instance is in the middle of destruction. When this is set,
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// the instance should not be accessed from callback.
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// CameraService's mClientLock should be acquired to access this.
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// - subclasses should set this to true in their destructors.
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bool mDestructionStarted;
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// these are initialized in the constructor.
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sp<CameraService> mCameraService; // immutable after constructor
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int mCameraId; // immutable after constructor
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int mCameraFacing; // immutable after constructor
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const String16 mClientPackageName;
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pid_t mClientPid;
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uid_t mClientUid; // immutable after constructor
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pid_t mServicePid; // immutable after constructor
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// - The app-side Binder interface to receive callbacks from us
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sp<IBinder> mRemoteBinder; // immutable after constructor
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// permissions management
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status_t startCameraOps();
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status_t finishCameraOps();
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// Notify client about a fatal error
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virtual void notifyError() = 0;
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private:
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AppOpsManager mAppOpsManager;
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class OpsCallback : public BnAppOpsCallback {
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public:
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OpsCallback(wp<BasicClient> client);
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virtual void opChanged(int32_t op, const String16& packageName);
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private:
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wp<BasicClient> mClient;
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}; // class OpsCallback
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sp<OpsCallback> mOpsCallback;
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// Track whether startCameraOps was called successfully, to avoid
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// finishing what we didn't start.
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bool mOpsActive;
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// IAppOpsCallback interface, indirected through opListener
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virtual void opChanged(int32_t op, const String16& packageName);
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}; // class BasicClient
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class Client : public BnCamera, public BasicClient
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{
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public:
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typedef ICameraClient TCamCallbacks;
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// ICamera interface (see ICamera for details)
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virtual void disconnect();
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virtual status_t connect(const sp<ICameraClient>& client) = 0;
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virtual status_t lock() = 0;
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virtual status_t unlock() = 0;
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virtual status_t setPreviewTarget(const sp<IGraphicBufferProducer>& bufferProducer)=0;
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virtual void setPreviewCallbackFlag(int flag) = 0;
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virtual status_t setPreviewCallbackTarget(
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const sp<IGraphicBufferProducer>& callbackProducer) = 0;
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virtual status_t startPreview() = 0;
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virtual void stopPreview() = 0;
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virtual bool previewEnabled() = 0;
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virtual status_t storeMetaDataInBuffers(bool enabled) = 0;
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virtual status_t startRecording() = 0;
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virtual void stopRecording() = 0;
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virtual bool recordingEnabled() = 0;
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virtual void releaseRecordingFrame(const sp<IMemory>& mem) = 0;
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virtual status_t autoFocus() = 0;
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virtual status_t cancelAutoFocus() = 0;
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virtual status_t takePicture(int msgType) = 0;
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virtual status_t setParameters(const String8& params) = 0;
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virtual String8 getParameters() const = 0;
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virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) = 0;
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// Interface used by CameraService
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Client(const sp<CameraService>& cameraService,
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const sp<ICameraClient>& cameraClient,
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const String16& clientPackageName,
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int cameraId,
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int cameraFacing,
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int clientPid,
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uid_t clientUid,
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int servicePid);
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~Client();
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// return our camera client
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const sp<ICameraClient>& getRemoteCallback() {
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return mRemoteCallback;
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}
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virtual sp<IBinder> asBinderWrapper() {
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return asBinder();
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}
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protected:
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static Mutex* getClientLockFromCookie(void* user);
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// convert client from cookie. Client lock should be acquired before getting Client.
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static Client* getClientFromCookie(void* user);
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virtual void notifyError();
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// Initialized in constructor
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// - The app-side Binder interface to receive callbacks from us
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sp<ICameraClient> mRemoteCallback;
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}; // class Client
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class ProClient : public BnProCameraUser, public BasicClient {
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public:
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typedef IProCameraCallbacks TCamCallbacks;
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ProClient(const sp<CameraService>& cameraService,
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const sp<IProCameraCallbacks>& remoteCallback,
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const String16& clientPackageName,
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int cameraId,
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int cameraFacing,
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int clientPid,
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uid_t clientUid,
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int servicePid);
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virtual ~ProClient();
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const sp<IProCameraCallbacks>& getRemoteCallback() {
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return mRemoteCallback;
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}
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/***
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IProCamera implementation
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***/
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virtual status_t connect(const sp<IProCameraCallbacks>& callbacks)
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= 0;
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virtual status_t exclusiveTryLock() = 0;
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virtual status_t exclusiveLock() = 0;
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virtual status_t exclusiveUnlock() = 0;
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virtual bool hasExclusiveLock() = 0;
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// Note that the callee gets a copy of the metadata.
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virtual int submitRequest(camera_metadata_t* metadata,
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bool streaming = false) = 0;
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virtual status_t cancelRequest(int requestId) = 0;
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// Callbacks from camera service
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virtual void onExclusiveLockStolen() = 0;
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protected:
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virtual void notifyError();
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sp<IProCameraCallbacks> mRemoteCallback;
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}; // class ProClient
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private:
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// Delay-load the Camera HAL module
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virtual void onFirstRef();
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// Step 1. Check if we can connect, before we acquire the service lock.
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status_t validateConnect(int cameraId,
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/*inout*/
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int& clientUid) const;
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// Step 2. Check if we can connect, after we acquire the service lock.
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bool canConnectUnsafe(int cameraId,
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const String16& clientPackageName,
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const sp<IBinder>& remoteCallback,
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/*out*/
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sp<BasicClient> &client);
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// When connection is successful, initialize client and track its death
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status_t connectFinishUnsafe(const sp<BasicClient>& client,
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const sp<IBinder>& remoteCallback);
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virtual sp<BasicClient> getClientByRemote(const wp<IBinder>& cameraClient);
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Mutex mServiceLock;
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// either a Client or CameraDeviceClient
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wp<BasicClient> mClient[MAX_CAMERAS]; // protected by mServiceLock
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Mutex mClientLock[MAX_CAMERAS]; // prevent Client destruction inside callbacks
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int mNumberOfCameras;
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typedef wp<ProClient> weak_pro_client_ptr;
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Vector<weak_pro_client_ptr> mProClientList[MAX_CAMERAS];
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// needs to be called with mServiceLock held
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sp<BasicClient> findClientUnsafe(const wp<IBinder>& cameraClient, int& outIndex);
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sp<ProClient> findProClientUnsafe(
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const wp<IBinder>& cameraCallbacksRemote);
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// atomics to record whether the hardware is allocated to some client.
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volatile int32_t mBusy[MAX_CAMERAS];
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void setCameraBusy(int cameraId);
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void setCameraFree(int cameraId);
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// sounds
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MediaPlayer* newMediaPlayer(const char *file);
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Mutex mSoundLock;
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sp<MediaPlayer> mSoundPlayer[NUM_SOUNDS];
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int mSoundRef; // reference count (release all MediaPlayer when 0)
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camera_module_t *mModule;
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Vector<sp<ICameraServiceListener> >
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mListenerList;
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// guard only mStatusList and the broadcasting of ICameraServiceListener
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mutable Mutex mStatusMutex;
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ICameraServiceListener::Status
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mStatusList[MAX_CAMERAS];
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// Read the current status (locks mStatusMutex)
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ICameraServiceListener::Status
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getStatus(int cameraId) const;
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typedef Vector<ICameraServiceListener::Status> StatusVector;
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// Broadcast the new status if it changed (locks the service mutex)
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void updateStatus(
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ICameraServiceListener::Status status,
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int32_t cameraId,
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const StatusVector *rejectSourceStates = NULL);
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// IBinder::DeathRecipient implementation
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virtual void binderDied(const wp<IBinder> &who);
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// Helpers
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bool isValidCameraId(int cameraId);
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};
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} // namespace android
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|
#endif
|