services/camera/libcameraservice/ProCamera2Client.cpp - fp2-dev/platform/frameworks/av - Gitiles

 /*
  * 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.
  */

 #define LOG_TAG "ProCamera2Client"
 #define ATRACE_TAG ATRACE_TAG_CAMERA
 //#define LOG_NDEBUG 0

 #include <utils/Log.h>
 #include <utils/Trace.h>

 #include <cutils/properties.h>
 #include <gui/Surface.h>
 #include <gui/Surface.h>
 #include "camera2/Parameters.h"
 #include "ProCamera2Client.h"
 #include "camera2/ProFrameProcessor.h"

 namespace android {
 using namespace camera2;

 static int getCallingPid() {
     return IPCThreadState::self()->getCallingPid();
 }

 static int getCallingUid() {
     return IPCThreadState::self()->getCallingUid();
 }

 // Interface used by CameraService

 ProCamera2Client::ProCamera2Client(const sp<CameraService>& cameraService,
         const sp<IProCameraCallbacks>& remoteCallback,
         int cameraId,
         int cameraFacing,
         int clientPid,
         int servicePid):
         ProClient(cameraService, remoteCallback,
                 cameraId, cameraFacing, clientPid, servicePid),
         mSharedCameraCallbacks(remoteCallback)
 {
     ATRACE_CALL();
     ALOGI("ProCamera %d: Opened", cameraId);

     mDevice = new Camera2Device(cameraId);

     mExclusiveLock = false;
 }

 status_t ProCamera2Client::checkPid(const char* checkLocation) const {
     int callingPid = getCallingPid();
     if (callingPid == mClientPid) return NO_ERROR;

     ALOGE("%s: attempt to use a locked camera from a different process"
             " (old pid %d, new pid %d)", checkLocation, mClientPid, callingPid);
     return PERMISSION_DENIED;
 }

 status_t ProCamera2Client::initialize(camera_module_t *module)
 {
     ATRACE_CALL();
     ALOGV("%s: Initializing client for camera %d", __FUNCTION__, mCameraId);
     status_t res;

     res = mDevice->initialize(module);
     if (res != OK) {
         ALOGE("%s: Camera %d: unable to initialize device: %s (%d)",
                 __FUNCTION__, mCameraId, strerror(-res), res);
         return NO_INIT;
     }

     res = mDevice->setNotifyCallback(this);

     String8 threadName;
     mFrameProcessor = new ProFrameProcessor(this);
     threadName = String8::format("PC2-%d-FrameProc",
             mCameraId);
     mFrameProcessor->run(threadName.string());

     mFrameProcessor->registerListener(FRAME_PROCESSOR_LISTENER_MIN_ID,
                                       FRAME_PROCESSOR_LISTENER_MAX_ID,
                                       /*listener*/this);

     return OK;
 }

 ProCamera2Client::~ProCamera2Client() {
     ATRACE_CALL();

     mDestructionStarted = true;

     disconnect();

     ALOGI("ProCamera %d: Closed", mCameraId);
 }

 status_t ProCamera2Client::exclusiveTryLock() {
     ATRACE_CALL();
     ALOGV("%s", __FUNCTION__);

     Mutex::Autolock icl(mIProCameraUserLock);
     SharedCameraCallbacks::Lock l(mSharedCameraCallbacks);

     if (!mExclusiveLock) {
         mExclusiveLock = true;

         if (mRemoteCallback != NULL) {
             mRemoteCallback->onLockStatusChanged(
                               IProCameraCallbacks::LOCK_ACQUIRED);
         }

         ALOGV("%s: exclusive lock acquired", __FUNCTION__);

         return OK;
     }

     // TODO: have a PERMISSION_DENIED case for when someone else owns the lock

     // don't allow recursive locking
     ALOGW("%s: exclusive lock already exists - recursive locking is not"
           "allowed", __FUNCTION__);

     return ALREADY_EXISTS;
 }

 status_t ProCamera2Client::exclusiveLock() {
     ATRACE_CALL();
     ALOGV("%s", __FUNCTION__);

     Mutex::Autolock icl(mIProCameraUserLock);
     SharedCameraCallbacks::Lock l(mSharedCameraCallbacks);

     /**
      * TODO: this should asynchronously 'wait' until the lock becomes available
      * if another client already has an exclusive lock.
      *
      * once we have proper sharing support this will need to do
      * more than just return immediately
      */
     if (!mExclusiveLock) {
         mExclusiveLock = true;

         if (mRemoteCallback != NULL) {
             mRemoteCallback->onLockStatusChanged(IProCameraCallbacks::LOCK_ACQUIRED);
         }

         ALOGV("%s: exclusive lock acquired", __FUNCTION__);

         return OK;
     }

     // don't allow recursive locking
     ALOGW("%s: exclusive lock already exists - recursive locking is not allowed"
                                                                 , __FUNCTION__);
     return ALREADY_EXISTS;
 }

 status_t ProCamera2Client::exclusiveUnlock() {
     ATRACE_CALL();
     ALOGV("%s", __FUNCTION__);

     Mutex::Autolock icl(mIProCameraUserLock);
     SharedCameraCallbacks::Lock l(mSharedCameraCallbacks);

     // don't allow unlocking if we have no lock
     if (!mExclusiveLock) {
         ALOGW("%s: cannot unlock, no lock was held in the first place",
               __FUNCTION__);
         return BAD_VALUE;
     }

     mExclusiveLock = false;
     if (mRemoteCallback != NULL ) {
         mRemoteCallback->onLockStatusChanged(
                                        IProCameraCallbacks::LOCK_RELEASED);
     }
     ALOGV("%s: exclusive lock released", __FUNCTION__);

     return OK;
 }

 bool ProCamera2Client::hasExclusiveLock() {
     return mExclusiveLock;
 }

 status_t ProCamera2Client::submitRequest(camera_metadata_t* request,
                                          bool streaming) {
     ATRACE_CALL();
     ALOGV("%s", __FUNCTION__);

     Mutex::Autolock icl(mIProCameraUserLock);
     if (!mExclusiveLock) {
         return PERMISSION_DENIED;
     }

     CameraMetadata metadata(request);

     if (streaming) {
         return mDevice->setStreamingRequest(metadata);
     } else {
         return mDevice->capture(metadata);
     }

     // unreachable. thx gcc for a useless warning
     return OK;
 }

 status_t ProCamera2Client::cancelRequest(int requestId) {
     ATRACE_CALL();
     ALOGV("%s", __FUNCTION__);

     Mutex::Autolock icl(mIProCameraUserLock);
     if (!mExclusiveLock) {
         return PERMISSION_DENIED;
     }

     ALOGE("%s: not fully implemented yet", __FUNCTION__);
     return INVALID_OPERATION;
 }

 status_t ProCamera2Client::requestStream(int streamId) {
     ALOGE("%s: not implemented yet", __FUNCTION__);

     return INVALID_OPERATION;
 }

 status_t ProCamera2Client::cancelStream(int streamId) {
     ATRACE_CALL();
     ALOGV("%s (streamId = 0x%x)", __FUNCTION__, streamId);

     status_t res;
     if ( (res = checkPid(__FUNCTION__) ) != OK) return res;

     Mutex::Autolock icl(mIProCameraUserLock);

     mDevice->clearStreamingRequest();

     status_t code;
     if ((code = mDevice->waitUntilDrained()) != OK) {
         ALOGE("%s: waitUntilDrained failed with code 0x%x", __FUNCTION__, code);
     }

     return mDevice->deleteStream(streamId);
 }

 status_t ProCamera2Client::createStream(int width, int height, int format,
                       const sp<IGraphicBufferProducer>& bufferProducer,
                       /*out*/
                       int* streamId)
 {
     if (streamId) {
         *streamId = -1;
     }

     ATRACE_CALL();
     ALOGV("%s (w = %d, h = %d, f = 0x%x)", __FUNCTION__, width, height, format);

     status_t res;
     if ( (res = checkPid(__FUNCTION__) ) != OK) return res;

     Mutex::Autolock icl(mIProCameraUserLock);

     sp<IBinder> binder;
     sp<ANativeWindow> window;
     if (bufferProducer != 0) {
         binder = bufferProducer->asBinder();
         window = new Surface(bufferProducer);
     }

     return mDevice->createStream(window, width, height, format, /*size*/1,
                                  streamId);
 }

 // Create a request object from a template.
 // -- Caller owns the newly allocated metadata
 status_t ProCamera2Client::createDefaultRequest(int templateId,
                              /*out*/
                               camera_metadata** request)
 {
     ATRACE_CALL();
     ALOGV("%s (templateId = 0x%x)", __FUNCTION__, templateId);

     if (request) {
         *request = NULL;
     }

     status_t res;
     if ( (res = checkPid(__FUNCTION__) ) != OK) return res;

     Mutex::Autolock icl(mIProCameraUserLock);

     CameraMetadata metadata;
     if ( (res = mDevice->createDefaultRequest(templateId, &metadata) ) == OK) {
         *request = metadata.release();
     }

     return res;
 }

 status_t ProCamera2Client::getCameraInfo(int cameraId,
                                          /*out*/
                                          camera_metadata** info)
 {
     if (cameraId != mCameraId) {
         return INVALID_OPERATION;
     }

     CameraMetadata deviceInfo = mDevice->info();
     *info = deviceInfo.release();

     return OK;
 }

 status_t ProCamera2Client::dump(int fd, const Vector<String16>& args) {
     String8 result;
     result.appendFormat("ProCamera2Client[%d] (%p) PID: %d, dump:\n",
             mCameraId,
             getRemoteCallback()->asBinder().get(),
             mClientPid);
     result.append("  State: ");

     // TODO: print dynamic/request section from most recent requests
     mFrameProcessor->dump(fd, args);

 #define CASE_APPEND_ENUM(x) case x: result.append(#x "\n"); break;

     result = "  Device dump:\n";
     write(fd, result.string(), result.size());

     status_t res = mDevice->dump(fd, args);
     if (res != OK) {
         result = String8::format("   Error dumping device: %s (%d)",
                 strerror(-res), res);
         write(fd, result.string(), result.size());
     }

 #undef CASE_APPEND_ENUM
     return NO_ERROR;
 }

 // IProCameraUser interface

 void ProCamera2Client::disconnect() {
     ATRACE_CALL();
     Mutex::Autolock icl(mIProCameraUserLock);
     status_t res;

     // Allow both client and the media server to disconnect at all times
     int callingPid = getCallingPid();
     if (callingPid != mClientPid && callingPid != mServicePid) return;

     if (mDevice == 0) return;

     ALOGV("Camera %d: Shutting down", mCameraId);
     mFrameProcessor->removeListener(FRAME_PROCESSOR_LISTENER_MIN_ID,
                                     FRAME_PROCESSOR_LISTENER_MAX_ID,
                                     /*listener*/this);
     mFrameProcessor->requestExit();
     ALOGV("Camera %d: Waiting for threads", mCameraId);
     mFrameProcessor->join();
     ALOGV("Camera %d: Disconnecting device", mCameraId);

     mDevice->disconnect();

     mDevice.clear();

     ProClient::disconnect();
 }

 status_t ProCamera2Client::connect(const sp<IProCameraCallbacks>& client) {
     ATRACE_CALL();
     ALOGV("%s: E", __FUNCTION__);
     Mutex::Autolock icl(mIProCameraUserLock);

     if (mClientPid != 0 && getCallingPid() != mClientPid) {
         ALOGE("%s: Camera %d: Connection attempt from pid %d; "
                 "current locked to pid %d", __FUNCTION__,
                 mCameraId, getCallingPid(), mClientPid);
         return BAD_VALUE;
     }

     mClientPid = getCallingPid();

     mRemoteCallback = client;
     mSharedCameraCallbacks = client;

     return OK;
 }

 /** Device-related methods */

 void ProCamera2Client::notifyError(int errorCode, int arg1, int arg2) {
     ALOGE("Error condition %d reported by HAL, arguments %d, %d", errorCode,
                                                                     arg1, arg2);
 }

 void ProCamera2Client::notifyShutter(int frameNumber, nsecs_t timestamp) {
     ALOGV("%s: Shutter notification for frame %d at time %lld", __FUNCTION__,
             frameNumber, timestamp);
 }

 void ProCamera2Client::notifyAutoFocus(uint8_t newState, int triggerId) {
     ALOGV("%s: Autofocus state now %d, last trigger %d",
             __FUNCTION__, newState, triggerId);

     SharedCameraCallbacks::Lock l(mSharedCameraCallbacks);
     if (l.mRemoteCallback != 0) {
         l.mRemoteCallback->notifyCallback(CAMERA_MSG_FOCUS_MOVE,
                 1, 0);
     }
     if (l.mRemoteCallback != 0) {
         l.mRemoteCallback->notifyCallback(CAMERA_MSG_FOCUS,
                 1, 0);
     }
 }

 void ProCamera2Client::notifyAutoExposure(uint8_t newState, int triggerId) {
     ALOGV("%s: Autoexposure state now %d, last trigger %d",
             __FUNCTION__, newState, triggerId);
 }

 void ProCamera2Client::notifyAutoWhitebalance(uint8_t newState, int triggerId) {
     ALOGV("%s: Auto-whitebalance state now %d, last trigger %d",
             __FUNCTION__, newState, triggerId);
 }

 int ProCamera2Client::getCameraId() const {
     return mCameraId;
 }

 const sp<Camera2Device>& ProCamera2Client::getCameraDevice() {
     return mDevice;
 }

 const sp<CameraService>& ProCamera2Client::getCameraService() {
     return mCameraService;
 }

 ProCamera2Client::SharedCameraCallbacks::Lock::Lock(
                                                  SharedCameraCallbacks &client):
         mRemoteCallback(client.mRemoteCallback),
         mSharedClient(client) {
     mSharedClient.mRemoteCallbackLock.lock();
 }

 ProCamera2Client::SharedCameraCallbacks::Lock::~Lock() {
     mSharedClient.mRemoteCallbackLock.unlock();
 }

 ProCamera2Client::SharedCameraCallbacks::SharedCameraCallbacks
                                          (const sp<IProCameraCallbacks>&client):
         mRemoteCallback(client) {
 }

 ProCamera2Client::SharedCameraCallbacks&
                              ProCamera2Client::SharedCameraCallbacks::operator=(
         const sp<IProCameraCallbacks>&client) {
     Mutex::Autolock l(mRemoteCallbackLock);
     mRemoteCallback = client;
     return *this;
 }

 void ProCamera2Client::SharedCameraCallbacks::clear() {
     Mutex::Autolock l(mRemoteCallbackLock);
     mRemoteCallback.clear();
 }

 void ProCamera2Client::onFrameAvailable(int32_t frameId,
                                         const CameraMetadata& frame) {
     ATRACE_CALL();
     ALOGV("%s", __FUNCTION__);

     Mutex::Autolock icl(mIProCameraUserLock);
     SharedCameraCallbacks::Lock l(mSharedCameraCallbacks);

     if (mRemoteCallback != NULL) {
         CameraMetadata tmp(frame);
         camera_metadata_t* meta = tmp.release();
         ALOGV("%s: meta = %p ", __FUNCTION__, meta);
         mRemoteCallback->onResultReceived(frameId, meta);
         tmp.acquire(meta);
     }

 }

 } // namespace android
	/*
	* 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.
	*/

	#define LOG_TAG "ProCamera2Client"
	#define ATRACE_TAG ATRACE_TAG_CAMERA
	//#define LOG_NDEBUG 0

	#include <utils/Log.h>
	#include <utils/Trace.h>

	#include <cutils/properties.h>
	#include <gui/Surface.h>
	#include <gui/Surface.h>
	#include "camera2/Parameters.h"
	#include "ProCamera2Client.h"
	#include "camera2/ProFrameProcessor.h"

	namespace android {
	using namespace camera2;

	static int getCallingPid() {
	return IPCThreadState::self()->getCallingPid();
	}

	static int getCallingUid() {
	return IPCThreadState::self()->getCallingUid();
	}

	// Interface used by CameraService

	ProCamera2Client::ProCamera2Client(const sp<CameraService>& cameraService,
	const sp<IProCameraCallbacks>& remoteCallback,
	int cameraId,
	int cameraFacing,
	int clientPid,
	int servicePid):
	ProClient(cameraService, remoteCallback,
	cameraId, cameraFacing, clientPid, servicePid),
	mSharedCameraCallbacks(remoteCallback)
	{
	ATRACE_CALL();
	ALOGI("ProCamera %d: Opened", cameraId);

	mDevice = new Camera2Device(cameraId);

	mExclusiveLock = false;
	}

	status_t ProCamera2Client::checkPid(const char* checkLocation) const {
	int callingPid = getCallingPid();
	if (callingPid == mClientPid) return NO_ERROR;

	ALOGE("%s: attempt to use a locked camera from a different process"
	" (old pid %d, new pid %d)", checkLocation, mClientPid, callingPid);
	return PERMISSION_DENIED;
	}

	status_t ProCamera2Client::initialize(camera_module_t *module)
	{
	ATRACE_CALL();
	ALOGV("%s: Initializing client for camera %d", __FUNCTION__, mCameraId);
	status_t res;

	res = mDevice->initialize(module);
	if (res != OK) {
	ALOGE("%s: Camera %d: unable to initialize device: %s (%d)",
	__FUNCTION__, mCameraId, strerror(-res), res);
	return NO_INIT;
	}

	res = mDevice->setNotifyCallback(this);

	String8 threadName;
	mFrameProcessor = new ProFrameProcessor(this);
	threadName = String8::format("PC2-%d-FrameProc",
	mCameraId);
	mFrameProcessor->run(threadName.string());

	mFrameProcessor->registerListener(FRAME_PROCESSOR_LISTENER_MIN_ID,
	FRAME_PROCESSOR_LISTENER_MAX_ID,
	/listener/this);

	return OK;
	}

	ProCamera2Client::~ProCamera2Client() {
	ATRACE_CALL();

	mDestructionStarted = true;

	disconnect();

	ALOGI("ProCamera %d: Closed", mCameraId);
	}

	status_t ProCamera2Client::exclusiveTryLock() {
	ATRACE_CALL();
	ALOGV("%s", __FUNCTION__);

	Mutex::Autolock icl(mIProCameraUserLock);
	SharedCameraCallbacks::Lock l(mSharedCameraCallbacks);

	if (!mExclusiveLock) {
	mExclusiveLock = true;

	if (mRemoteCallback != NULL) {
	mRemoteCallback->onLockStatusChanged(
	IProCameraCallbacks::LOCK_ACQUIRED);
	}

	ALOGV("%s: exclusive lock acquired", __FUNCTION__);

	return OK;
	}

	// TODO: have a PERMISSION_DENIED case for when someone else owns the lock

	// don't allow recursive locking
	ALOGW("%s: exclusive lock already exists - recursive locking is not"
	"allowed", __FUNCTION__);

	return ALREADY_EXISTS;
	}

	status_t ProCamera2Client::exclusiveLock() {
	ATRACE_CALL();
	ALOGV("%s", __FUNCTION__);

	Mutex::Autolock icl(mIProCameraUserLock);
	SharedCameraCallbacks::Lock l(mSharedCameraCallbacks);

	/**
	* TODO: this should asynchronously 'wait' until the lock becomes available
	* if another client already has an exclusive lock.
	*
	* once we have proper sharing support this will need to do
	* more than just return immediately
	*/
	if (!mExclusiveLock) {
	mExclusiveLock = true;

	if (mRemoteCallback != NULL) {
	mRemoteCallback->onLockStatusChanged(IProCameraCallbacks::LOCK_ACQUIRED);
	}

	ALOGV("%s: exclusive lock acquired", __FUNCTION__);

	return OK;
	}

	// don't allow recursive locking
	ALOGW("%s: exclusive lock already exists - recursive locking is not allowed"
	, __FUNCTION__);
	return ALREADY_EXISTS;
	}

	status_t ProCamera2Client::exclusiveUnlock() {
	ATRACE_CALL();
	ALOGV("%s", __FUNCTION__);

	Mutex::Autolock icl(mIProCameraUserLock);
	SharedCameraCallbacks::Lock l(mSharedCameraCallbacks);

	// don't allow unlocking if we have no lock
	if (!mExclusiveLock) {
	ALOGW("%s: cannot unlock, no lock was held in the first place",
	__FUNCTION__);
	return BAD_VALUE;
	}

	mExclusiveLock = false;
	if (mRemoteCallback != NULL ) {
	mRemoteCallback->onLockStatusChanged(
	IProCameraCallbacks::LOCK_RELEASED);
	}
	ALOGV("%s: exclusive lock released", __FUNCTION__);

	return OK;
	}

	bool ProCamera2Client::hasExclusiveLock() {
	return mExclusiveLock;
	}

	status_t ProCamera2Client::submitRequest(camera_metadata_t* request,
	bool streaming) {
	ATRACE_CALL();
	ALOGV("%s", __FUNCTION__);

	Mutex::Autolock icl(mIProCameraUserLock);
	if (!mExclusiveLock) {
	return PERMISSION_DENIED;
	}

	CameraMetadata metadata(request);

	if (streaming) {
	return mDevice->setStreamingRequest(metadata);
	} else {
	return mDevice->capture(metadata);
	}

	// unreachable. thx gcc for a useless warning
	return OK;
	}

	status_t ProCamera2Client::cancelRequest(int requestId) {
	ATRACE_CALL();
	ALOGV("%s", __FUNCTION__);

	Mutex::Autolock icl(mIProCameraUserLock);
	if (!mExclusiveLock) {
	return PERMISSION_DENIED;
	}

	ALOGE("%s: not fully implemented yet", __FUNCTION__);
	return INVALID_OPERATION;
	}

	status_t ProCamera2Client::requestStream(int streamId) {
	ALOGE("%s: not implemented yet", __FUNCTION__);

	return INVALID_OPERATION;
	}

	status_t ProCamera2Client::cancelStream(int streamId) {
	ATRACE_CALL();
	ALOGV("%s (streamId = 0x%x)", __FUNCTION__, streamId);

	status_t res;
	if ( (res = checkPid(__FUNCTION__) ) != OK) return res;

	Mutex::Autolock icl(mIProCameraUserLock);

	mDevice->clearStreamingRequest();

	status_t code;
	if ((code = mDevice->waitUntilDrained()) != OK) {
	ALOGE("%s: waitUntilDrained failed with code 0x%x", __FUNCTION__, code);
	}

	return mDevice->deleteStream(streamId);
	}

	status_t ProCamera2Client::createStream(int width, int height, int format,
	const sp<IGraphicBufferProducer>& bufferProducer,
	/out/
	int* streamId)
	{
	if (streamId) {
	*streamId = -1;
	}

	ATRACE_CALL();
	ALOGV("%s (w = %d, h = %d, f = 0x%x)", __FUNCTION__, width, height, format);

	status_t res;
	if ( (res = checkPid(__FUNCTION__) ) != OK) return res;

	Mutex::Autolock icl(mIProCameraUserLock);

	sp<IBinder> binder;
	sp<ANativeWindow> window;
	if (bufferProducer != 0) {
	binder = bufferProducer->asBinder();
	window = new Surface(bufferProducer);
	}

	return mDevice->createStream(window, width, height, format, /size/1,
	streamId);
	}

	// Create a request object from a template.
	// -- Caller owns the newly allocated metadata
	status_t ProCamera2Client::createDefaultRequest(int templateId,
	/out/
	camera_metadata** request)
	{
	ATRACE_CALL();
	ALOGV("%s (templateId = 0x%x)", __FUNCTION__, templateId);

	if (request) {
	*request = NULL;
	}

	status_t res;
	if ( (res = checkPid(__FUNCTION__) ) != OK) return res;

	Mutex::Autolock icl(mIProCameraUserLock);

	CameraMetadata metadata;
	if ( (res = mDevice->createDefaultRequest(templateId, &metadata) ) == OK) {
	*request = metadata.release();
	}

	return res;
	}

	status_t ProCamera2Client::getCameraInfo(int cameraId,
	/out/
	camera_metadata** info)
	{
	if (cameraId != mCameraId) {
	return INVALID_OPERATION;
	}

	CameraMetadata deviceInfo = mDevice->info();
	*info = deviceInfo.release();

	return OK;
	}

	status_t ProCamera2Client::dump(int fd, const Vector<String16>& args) {
	String8 result;
	result.appendFormat("ProCamera2Client[%d] (%p) PID: %d, dump:\n",
	mCameraId,
	getRemoteCallback()->asBinder().get(),
	mClientPid);
	result.append(" State: ");

	// TODO: print dynamic/request section from most recent requests
	mFrameProcessor->dump(fd, args);

	#define CASE_APPEND_ENUM(x) case x: result.append(#x "\n"); break;

	result = " Device dump:\n";
	write(fd, result.string(), result.size());

	status_t res = mDevice->dump(fd, args);
	if (res != OK) {
	result = String8::format(" Error dumping device: %s (%d)",
	strerror(-res), res);
	write(fd, result.string(), result.size());
	}

	#undef CASE_APPEND_ENUM
	return NO_ERROR;
	}

	// IProCameraUser interface

	void ProCamera2Client::disconnect() {
	ATRACE_CALL();
	Mutex::Autolock icl(mIProCameraUserLock);
	status_t res;

	// Allow both client and the media server to disconnect at all times
	int callingPid = getCallingPid();
	if (callingPid != mClientPid && callingPid != mServicePid) return;

	if (mDevice == 0) return;

	ALOGV("Camera %d: Shutting down", mCameraId);
	mFrameProcessor->removeListener(FRAME_PROCESSOR_LISTENER_MIN_ID,
	FRAME_PROCESSOR_LISTENER_MAX_ID,
	/listener/this);
	mFrameProcessor->requestExit();
	ALOGV("Camera %d: Waiting for threads", mCameraId);
	mFrameProcessor->join();
	ALOGV("Camera %d: Disconnecting device", mCameraId);

	mDevice->disconnect();

	mDevice.clear();

	ProClient::disconnect();
	}

	status_t ProCamera2Client::connect(const sp<IProCameraCallbacks>& client) {
	ATRACE_CALL();
	ALOGV("%s: E", __FUNCTION__);
	Mutex::Autolock icl(mIProCameraUserLock);

	if (mClientPid != 0 && getCallingPid() != mClientPid) {
	ALOGE("%s: Camera %d: Connection attempt from pid %d; "
	"current locked to pid %d", __FUNCTION__,
	mCameraId, getCallingPid(), mClientPid);
	return BAD_VALUE;
	}

	mClientPid = getCallingPid();

	mRemoteCallback = client;
	mSharedCameraCallbacks = client;

	return OK;
	}

	/** Device-related methods */

	void ProCamera2Client::notifyError(int errorCode, int arg1, int arg2) {
	ALOGE("Error condition %d reported by HAL, arguments %d, %d", errorCode,
	arg1, arg2);
	}

	void ProCamera2Client::notifyShutter(int frameNumber, nsecs_t timestamp) {
	ALOGV("%s: Shutter notification for frame %d at time %lld", __FUNCTION__,
	frameNumber, timestamp);
	}

	void ProCamera2Client::notifyAutoFocus(uint8_t newState, int triggerId) {
	ALOGV("%s: Autofocus state now %d, last trigger %d",
	__FUNCTION__, newState, triggerId);

	SharedCameraCallbacks::Lock l(mSharedCameraCallbacks);
	if (l.mRemoteCallback != 0) {
	l.mRemoteCallback->notifyCallback(CAMERA_MSG_FOCUS_MOVE,
	1, 0);
	}
	if (l.mRemoteCallback != 0) {
	l.mRemoteCallback->notifyCallback(CAMERA_MSG_FOCUS,
	1, 0);
	}
	}

	void ProCamera2Client::notifyAutoExposure(uint8_t newState, int triggerId) {
	ALOGV("%s: Autoexposure state now %d, last trigger %d",
	__FUNCTION__, newState, triggerId);
	}

	void ProCamera2Client::notifyAutoWhitebalance(uint8_t newState, int triggerId) {
	ALOGV("%s: Auto-whitebalance state now %d, last trigger %d",
	__FUNCTION__, newState, triggerId);
	}

	int ProCamera2Client::getCameraId() const {
	return mCameraId;
	}

	const sp<Camera2Device>& ProCamera2Client::getCameraDevice() {
	return mDevice;
	}

	const sp<CameraService>& ProCamera2Client::getCameraService() {
	return mCameraService;
	}

	ProCamera2Client::SharedCameraCallbacks::Lock::Lock(
	SharedCameraCallbacks &client):
	mRemoteCallback(client.mRemoteCallback),
	mSharedClient(client) {
	mSharedClient.mRemoteCallbackLock.lock();
	}

	ProCamera2Client::SharedCameraCallbacks::Lock::~Lock() {
	mSharedClient.mRemoteCallbackLock.unlock();
	}

	ProCamera2Client::SharedCameraCallbacks::SharedCameraCallbacks
	(const sp<IProCameraCallbacks>&client):
	mRemoteCallback(client) {
	}

	ProCamera2Client::SharedCameraCallbacks&
	ProCamera2Client::SharedCameraCallbacks::operator=(
	const sp<IProCameraCallbacks>&client) {
	Mutex::Autolock l(mRemoteCallbackLock);
	mRemoteCallback = client;
	return *this;
	}

	void ProCamera2Client::SharedCameraCallbacks::clear() {
	Mutex::Autolock l(mRemoteCallbackLock);
	mRemoteCallback.clear();
	}

	void ProCamera2Client::onFrameAvailable(int32_t frameId,
	const CameraMetadata& frame) {
	ATRACE_CALL();
	ALOGV("%s", __FUNCTION__);

	Mutex::Autolock icl(mIProCameraUserLock);
	SharedCameraCallbacks::Lock l(mSharedCameraCallbacks);

	if (mRemoteCallback != NULL) {
	CameraMetadata tmp(frame);
	camera_metadata_t* meta = tmp.release();
	ALOGV("%s: meta = %p ", __FUNCTION__, meta);
	mRemoteCallback->onResultReceived(frameId, meta);
	tmp.acquire(meta);
	}

	}

	} // namespace android