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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_PROCAMERA2CLIENT_H
#define ANDROID_SERVERS_CAMERA_PROCAMERA2CLIENT_H
#include "Camera2Device.h"
#include "CameraService.h"
#include "camera2/ProFrameProcessor.h"
namespace android {
class IMemory;
/**
* Implements the binder IProCameraUser API,
* meant for HAL2-level private API access.
*/
class ProCamera2Client :
public CameraService::ProClient,
public Camera2Device::NotificationListener,
public camera2::ProFrameProcessor::FilteredListener
{
public:
/**
* IProCameraUser interface (see IProCameraUser for details)
*/
virtual status_t connect(const sp<IProCameraCallbacks>& callbacks);
virtual void disconnect();
virtual status_t exclusiveTryLock();
virtual status_t exclusiveLock();
virtual status_t exclusiveUnlock();
virtual bool hasExclusiveLock();
// Note that the callee gets a copy of the metadata.
virtual int submitRequest(camera_metadata_t* metadata,
bool streaming = false);
virtual status_t cancelRequest(int requestId);
virtual status_t requestStream(int streamId);
virtual status_t cancelStream(int streamId);
virtual status_t createStream(int width, int height, int format,
const sp<IGraphicBufferProducer>& bufferProducer,
/*out*/
int* streamId);
// Create a request object from a template.
// -- Caller owns the newly allocated metadata
virtual status_t createDefaultRequest(int templateId,
/*out*/
camera_metadata** request);
// Get the static metadata for the camera
// -- Caller owns the newly allocated metadata
virtual status_t getCameraInfo(int cameraId,
/*out*/
camera_metadata** info);
/**
* Interface used by CameraService
*/
ProCamera2Client(const sp<CameraService>& cameraService,
const sp<IProCameraCallbacks>& remoteCallback,
const String16& clientPackageName,
int cameraId,
int cameraFacing,
int clientPid,
uid_t clientUid,
int servicePid);
virtual ~ProCamera2Client();
status_t initialize(camera_module_t *module);
virtual status_t dump(int fd, const Vector<String16>& args);
/**
* Interface used by Camera2Device
*/
virtual void notifyError(int errorCode, int arg1, int arg2);
virtual void notifyShutter(int frameNumber, 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);
int getCameraId() const;
const sp<Camera2Device>& getCameraDevice();
const sp<CameraService>& getCameraService();
/**
* Interface used by independent components of ProCamera2Client.
*/
// Simple class to ensure that access to IProCameraCallbacks is serialized
// by requiring mRemoteCallbackLock to be locked before access to
// mCameraClient is possible.
class SharedCameraCallbacks {
public:
class Lock {
public:
Lock(SharedCameraCallbacks &client);
~Lock();
sp<IProCameraCallbacks> &mRemoteCallback;
private:
SharedCameraCallbacks &mSharedClient;
};
SharedCameraCallbacks(const sp<IProCameraCallbacks>& client);
SharedCameraCallbacks& operator=(const sp<IProCameraCallbacks>& client);
void clear();
private:
sp<IProCameraCallbacks> mRemoteCallback;
mutable Mutex mRemoteCallbackLock;
} mSharedCameraCallbacks;
protected:
/** FilteredListener implementation **/
virtual void onFrameAvailable(int32_t frameId, const CameraMetadata& frame);
private:
/** IProCameraUser interface-related private members */
// Mutex that must be locked by methods implementing the IProCameraUser
// interface. Ensures serialization between incoming IProCameraUser calls.
// All methods below that append 'L' to the name assume that
// mIProCameraUserLock is locked when they're called
mutable Mutex mIProCameraUserLock;
// Used with stream IDs
static const int NO_STREAM = -1;
/* Preview/Recording related members */
sp<IBinder> mPreviewSurface;
/** Preview callback related members */
sp<camera2::ProFrameProcessor> mFrameProcessor;
static const int32_t FRAME_PROCESSOR_LISTENER_MIN_ID = 0;
static const int32_t FRAME_PROCESSOR_LISTENER_MAX_ID = 0x7fffffffL;
/** Camera2Device instance wrapping HAL2 entry */
sp<Camera2Device> mDevice;
/** Utility members */
// Verify that caller is the owner of the camera
status_t checkPid(const char *checkLocation) const;
// Whether or not we have an exclusive lock on the device
// - if no we can't modify the request queue.
// note that creating/deleting streams we own is still OK
bool mExclusiveLock;
};
}; // namespace android
#endif
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