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/*
* Copyright (C) 2013 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_CAMERA2CLIENT_BASE_H
#define ANDROID_SERVERS_CAMERA_CAMERA2CLIENT_BASE_H
#include "common/CameraDeviceBase.h"
#include "common/CameraModule.h"
#include "camera/CaptureResult.h"
namespace android {
class IMemory;
class CameraService;
template <typename TClientBase>
class Camera2ClientBase :
public TClientBase,
public CameraDeviceBase::NotificationListener
{
public:
typedef typename TClientBase::TCamCallbacks TCamCallbacks;
/**
* Base binder interface (see ICamera/ICameraDeviceUser for details)
*/
virtual status_t connect(const sp<TCamCallbacks>& callbacks);
virtual void disconnect();
/**
* Interface used by CameraService
*/
// TODO: too many params, move into a ClientArgs<T>
Camera2ClientBase(const sp<CameraService>& cameraService,
const sp<TCamCallbacks>& remoteCallback,
const String16& clientPackageName,
int cameraId,
int cameraFacing,
int clientPid,
uid_t clientUid,
int servicePid);
virtual ~Camera2ClientBase();
virtual status_t initialize(CameraModule *module);
virtual status_t dump(int fd, const Vector<String16>& args);
/**
* CameraDeviceBase::NotificationListener implementation
*/
virtual void notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
const CaptureResultExtras& resultExtras);
virtual void notifyIdle();
virtual void notifyShutter(const CaptureResultExtras& resultExtras,
nsecs_t timestamp);
virtual void notifyAutoFocus(uint8_t newState, int triggerId);
virtual void notifyAutoExposure(uint8_t newState, int triggerId);
virtual void notifyAutoWhitebalance(uint8_t newState,
int triggerId);
virtual void notifyPrepared(int streamId);
int getCameraId() const;
const sp<CameraDeviceBase>&
getCameraDevice();
int getCameraDeviceVersion() const;
const sp<CameraService>&
getCameraService();
/**
* Interface used by independent components of CameraClient2Base.
*/
// Simple class to ensure that access to TCamCallbacks is serialized
// by requiring mRemoteCallbackLock to be locked before access to
// mRemoteCallback is possible.
class SharedCameraCallbacks {
public:
class Lock {
public:
Lock(SharedCameraCallbacks &client);
~Lock();
sp<TCamCallbacks> &mRemoteCallback;
private:
SharedCameraCallbacks &mSharedClient;
};
SharedCameraCallbacks(const sp<TCamCallbacks>& client);
SharedCameraCallbacks& operator=(const sp<TCamCallbacks>& client);
void clear();
private:
sp<TCamCallbacks> mRemoteCallback;
mutable Mutex mRemoteCallbackLock;
} mSharedCameraCallbacks;
protected:
// The PID provided in the constructor call
pid_t mInitialClientPid;
virtual sp<IBinder> asBinderWrapper() {
return IInterface::asBinder(this);
}
virtual status_t dumpDevice(int fd, const Vector<String16>& args);
/** Binder client interface-related private members */
// Mutex that must be locked by methods implementing the binder client
// interface. Ensures serialization between incoming client calls.
// All methods in this class hierarchy that append 'L' to the name assume
// that mBinderSerializationLock is locked when they're called
mutable Mutex mBinderSerializationLock;
/** CameraDeviceBase instance wrapping HAL2+ entry */
const int mDeviceVersion;
sp<CameraDeviceBase> mDevice;
/** Utility members */
// Verify that caller is the owner of the camera
status_t checkPid(const char *checkLocation) const;
virtual void detachDevice();
bool mDeviceActive;
};
}; // namespace android
#endif
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