camera/hal/intel/ipu3/AAL/RequestThread.cpp - mirrors/cros/chromiumos/platform2 - Git at Google

 /*
  * Copyright (C) 2014-2018 Intel Corporation
  *
  * 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 "RequestThread"

 #include "RequestThread.h"
 #include "ResultProcessor.h"
 #include "CameraMetadataHelper.h"
 #include "PlatformData.h"
 #include "PerformanceTraces.h"

 namespace cros {
 namespace intel {
 /**
  * Stream type value conversion. Android headers are missing this.
  */
 const metadata_value_t streamTypeValues[] = {
     { "OUTPUT", CAMERA3_STREAM_OUTPUT },
     { "INPUT", CAMERA3_STREAM_INPUT },
     { "BIDIRECTIONAL", CAMERA3_STREAM_BIDIRECTIONAL }
 };

 RequestThread::RequestThread(int cameraId, ICameraHw* aCameraHW)
     : mCameraId(cameraId),
       mCameraHw(aCameraHW),
       mRequestsInHAL(0),
       mWaitingRequest(nullptr),
       mBlockAction(REQBLK_NONBLOCKING),
       mInitialized(false),
       mResultProcessor(nullptr),
       mStreamSeqNo(0),
       mCameraThread("Cam3ReqThread"),
       mWaitRequest(base::WaitableEvent::ResetPolicy::MANUAL,
                    base::WaitableEvent::InitialState::NOT_SIGNALED) {
   LOG1("@%s", __FUNCTION__);

   // Run Cam3ReqThread thread
   if (run() != OK) {
     LOGE("Failed to run Cam3ReqThread thread");
   }
 }

 RequestThread::~RequestThread()
 {
     deinit();
 }

 status_t
 RequestThread::init(const camera3_callback_ops_t *callback_ops)
 {
     LOG1("@%s", __FUNCTION__);

     mRequestsPool.init(MAX_REQUEST_IN_PROCESS_NUM);

     mResultProcessor = new ResultProcessor(this, callback_ops);
     mCameraHw->registerErrorCallback(mResultProcessor);
     mInitialized = true;
     return NO_ERROR;
 }

 status_t
 RequestThread::deinit()
 {
     if (!mInitialized) {
         return NO_ERROR;
     }

     if (mResultProcessor) {
         mCameraHw->registerErrorCallback(nullptr);
         mBlockAction = REQBLK_NONBLOCKING;
         mResultProcessor->requestExitAndWait();
         delete mResultProcessor;
         mResultProcessor = nullptr;
     }

     base::Callback<status_t()> closure =
             base::Bind(&RequestThread::handleExit, base::Unretained(this));
     mCameraThread.PostTaskAsync<status_t>(FROM_HERE, closure);

     mCameraThread.Stop();

     // Delete all streams
     for (unsigned int i = 0; i < mLocalStreams.size(); i++) {
         CameraStream *s = mLocalStreams.at(i);
         delete s;
     }

     mStreams.clear();
     mLocalStreams.clear();

     mWaitingRequest = nullptr;
     mBlockAction = REQBLK_NONBLOCKING;
     mRequestsPool.deInit();
     mInitialized = false;
     return NO_ERROR;
 }

 status_t RequestThread::run()
 {
     if (!mCameraThread.Start()) {
         LOGE("Camera thread failed to start");
         return UNKNOWN_ERROR;
     }
     return OK;
 }

 status_t
 RequestThread::configureStreams(camera3_stream_configuration_t *stream_list)
 {
     MessageConfigureStreams msg;
     msg.list = stream_list;

     status_t status = NO_ERROR;
     base::Callback<status_t()> closure =
             base::Bind(&RequestThread::handleConfigureStreams,
                        base::Unretained(this),
                        base::Passed(std::move(msg)));
     mCameraThread.PostTaskSync<status_t>(FROM_HERE, closure, &status);
     return status;
 }

 status_t RequestThread::handleConfigureStreams(MessageConfigureStreams msg)
 {
     LOG1("@%s", __FUNCTION__);

     status_t status = NO_ERROR;
     mLastSettings.clear();
     mWaitingRequest = nullptr;

     uint32_t streamsNum = msg.list->num_streams;
     int inStreamsNum = 0;
     int outStreamsNum = 0;
     uint32_t operation_mode = msg.list->operation_mode;
     camera3_stream_t *stream = nullptr;
     CameraStream * s = nullptr;
     LOG1("Received %d streams, operation mode %d :", streamsNum, operation_mode);
     if (operation_mode != CAMERA3_STREAM_CONFIGURATION_NORMAL_MODE &&
         operation_mode != CAMERA3_STREAM_CONFIGURATION_CONSTRAINED_HIGH_SPEED_MODE) {
         LOGE("Unknown operation mode %d!", operation_mode);
         return BAD_VALUE;
     }
     // Check number and type of streams
     for (uint32_t i = 0; i < streamsNum; i++) {
         stream = msg.list->streams[i];
         LOG1("Config stream (%s): %dx%d, fmt %s, usage %d, max buffers:%d, priv %p",
                 METAID2STR(streamTypeValues, stream->stream_type),
                 stream->width, stream->height,
                 METAID2STR(android_scaler_availableFormats_values, stream->format),
                 stream->usage,
                 stream->max_buffers, stream->priv);
         if (stream->stream_type == CAMERA3_STREAM_OUTPUT)
             outStreamsNum++;
         else if (stream->stream_type == CAMERA3_STREAM_INPUT)
             inStreamsNum++;
         else if (stream->stream_type == CAMERA3_STREAM_BIDIRECTIONAL) {
             inStreamsNum++;
             outStreamsNum++;
         } else {
             LOGE("Unknown stream type %d!", stream->stream_type);
             return BAD_VALUE;
         }
         if (inStreamsNum > 1) {
             LOGE("Too many input streams : %d !", inStreamsNum);
             return BAD_VALUE;
         }
     }

     if (!outStreamsNum) {
         LOGE("No output streams!");
         return BAD_VALUE;
     }

     // Mark all streams as NOT active
     for (unsigned int i = 0; i < mStreams.size(); i++) {
         s = (CameraStream *)(mStreams.at(i)->priv);
         s->setActive(false);
     }

     // Create for new streams
     for (uint32_t i = 0; i < streamsNum; i++) {
         stream = msg.list->streams[i];
         if (!stream->priv) {
             mStreams.push_back(stream);
             CameraStream* localStream = new CameraStream(mStreamSeqNo, stream, mResultProcessor);
             mLocalStreams.push_back(localStream);
             localStream->setActive(true);
             stream->priv = localStream;
             mStreamSeqNo++;
         } else {
             static_cast<CameraStream *>(stream->priv)->setActive(true);
         }
      }

     // Delete inactive streams
     deleteStreams(true);

     status = mCameraHw->configStreams(mStreams, operation_mode);
     if (status != NO_ERROR) {
         LOGE("Error configuring the streams @%s:%d", __FUNCTION__, __LINE__);
         // delete all streams
         deleteStreams(false);
         return status;
     }

     std::vector<CameraStream*> activeStreams;
     for (unsigned int i = 0; i < mStreams.size(); i++)
         activeStreams.push_back(static_cast<CameraStream*>(mStreams.at(i)->priv));

     return status;

 }

 status_t
 RequestThread::constructDefaultRequest(int type,
                                             camera_metadata_t** meta)
 {
     MessageConstructDefaultRequest msg;
     msg.type= type;
     msg.request = meta;
     status_t status = NO_ERROR;
     base::Callback<status_t()> closure =
             base::Bind(&RequestThread::handleConstructDefaultRequest,
                        base::Unretained(this),
                        base::Passed(std::move(msg)));
     mCameraThread.PostTaskSync<status_t>(FROM_HERE, closure, &status);
     return status;
 }

 status_t
 RequestThread::handleConstructDefaultRequest(MessageConstructDefaultRequest msg)
 {
     LOG2("@%s", __FUNCTION__);
     int requestType = msg.type;
     const camera_metadata_t* defaultRequest;
     defaultRequest = mCameraHw->getDefaultRequestSettings(requestType);
     *(msg.request) = (camera_metadata_t*)defaultRequest;

     return (*(msg.request)) ? NO_ERROR : NO_MEMORY;
 }

 status_t
 RequestThread::processCaptureRequest(camera3_capture_request_t *request)
 {
     MessageProcessCaptureRequest msg;
     msg.request3 = request;

     status_t status = NO_ERROR;
     base::Callback<status_t()> closure =
             base::Bind(&RequestThread::handleProcessCaptureRequest,
                        base::Unretained(this),
                        base::Passed(std::move(msg)));
     mCameraThread.PostTaskSync<status_t>(FROM_HERE, closure, &status);
     if (mBlockAction != REQBLK_NONBLOCKING) {
         mWaitRequest.Reset();
         mWaitRequest.Wait();
     }
     return status;
 }

 // NO_ERROR: request process is OK (waiting for ISP mode change or shutter)
 // BAD_VALUE: request is not correct
 // else: request process failed due to device error
 status_t
 RequestThread::handleProcessCaptureRequest(MessageProcessCaptureRequest msg)
 {
     LOG2("%s:", __FUNCTION__);
     status_t status = BAD_VALUE;

     Camera3Request *request;
     status = mRequestsPool.acquireItem(&request);
     if (status != NO_ERROR) {
         LOGE("Failed to acquire empty  Request from the pool (%d)", status);
         return status;
     }
     // Request counter
     mRequestsInHAL++;
     PERFORMANCE_HAL_ATRACE_PARAM1("mRequestsInHAL", mRequestsInHAL);

     /**
      * Settings may be nullptr in repeating requests but not in the first one
      * check that now.
      */
     if (msg.request3->settings) {
         MetadataHelper::dumpMetadata(msg.request3->settings);
         // This assignment implies a memcopy.
         // mLastSettings has a copy of the current settings
         mLastSettings = msg.request3->settings;
     } else if (mLastSettings.isEmpty()) {
         status = BAD_VALUE;
         LOGE("ERROR: nullptr settings for the first request!");
         goto badRequest;
     }

     status = request->init(msg.request3,
                            mResultProcessor,
                            mLastSettings, mCameraId);
     if (status != NO_ERROR) {
         LOGE("Failed to initialize Request (%d)", status);
         goto badRequest;
     }

     // HAL should block user to send this new request when:
     //   1. The count of requests in process reached the PSL capacity.
     //   2. When the request requires reconfiguring the ISP in a manner which
     //      requires stopping the pipeline and emptying the driver from buffers
     //   3. when any of the streams has all buffers in HAL

     // Send for capture
     status = captureRequest(request);
     if (status == REQBLK_WAIT_ALL_PREVIOUS_COMPLETED || status == REQBLK_WAIT_ONE_REQUEST_COMPLETED) {
         // Need ISP reconfiguration
         mWaitingRequest = request;
         mBlockAction = status;
         return NO_ERROR;
     } else if (status != NO_ERROR) {
         status =  UNKNOWN_ERROR;
         goto badRequest;
     }

     if (!areAllStreamsUnderMaxBuffers()) {
         // Request Q is full
         mBlockAction = REQBLK_WAIT_ONE_REQUEST_COMPLETED;
     }
     return NO_ERROR;

 badRequest:
     request->deInit();
     mRequestsPool.releaseItem(request);
     mRequestsInHAL--;
     return status;
 }

 int
 RequestThread::returnRequest(Camera3Request* req)
 {
     MessageStreamOutDone msg;
     msg.request = req;
     msg.reqId = req->getId();

     base::Callback<status_t()> closure =
             base::Bind(&RequestThread::handleReturnRequest,
                        base::Unretained(this), base::Passed(std::move(msg)));
     mCameraThread.PostTaskAsync<status_t>(FROM_HERE, closure);
     return 0;
 }

 status_t
 RequestThread::handleReturnRequest(MessageStreamOutDone msg)
 {
     Camera3Request* request = msg.request;
     status_t status = NO_ERROR;

     request->deInit();
     mRequestsPool.releaseItem(request);
     mRequestsInHAL--;
     // Check blocked request
     if (mBlockAction != REQBLK_NONBLOCKING) {
         if (mWaitingRequest != nullptr &&
                 ((mBlockAction == REQBLK_WAIT_ONE_REQUEST_COMPLETED) ||
                 (mBlockAction == REQBLK_WAIT_ALL_PREVIOUS_COMPLETED && mRequestsInHAL == 1))) {
             status = captureRequest(mWaitingRequest);
             if (status != NO_ERROR) {
                 mWaitingRequest->deInit();
                 mRequestsPool.releaseItem(mWaitingRequest);
                 mRequestsInHAL--;
             }
             mWaitingRequest = nullptr;
         }
         if (mWaitingRequest == nullptr) {
             if (areAllStreamsUnderMaxBuffers()) {
                 mBlockAction = REQBLK_NONBLOCKING;
                 mWaitRequest.Signal();
             }
         }
     }

     return 0;
 }

 /**
  * flush
  *  if hal version >= CAMERA_DEVICE_API_VERSION_3_1, we need to support flush()
  *  this is the implement for the dummy flush, it will wait all the request to
  *  finish and then return.
  *  flush() should only return when there are no more outstanding buffers or
  *  requests left in the HAL.
  *  flush() must return within 1000ms
  */
 status_t RequestThread::flush(void)
 {
     // signal the PSL it should flush requests. PSL are free to complete the
     // results as they want to (with.

     mCameraHw->flush();

     nsecs_t startTime = systemTime();
     nsecs_t interval = 0;

     // wait 1000ms at most while there are requests in the HAL
     while (mRequestsInHAL > 0 && interval / 1000 <= 1000000) {
         usleep(10000); // wait 10ms
         interval = systemTime() - startTime;
     }

     LOG2("@%s, line:%d, mRequestsInHAL:%d, time spend:%" PRId64 "us",
             __FUNCTION__, __LINE__, mRequestsInHAL, interval / 1000);

     nsecs_t intervalTimeout = 1000000;
     if (interval / 1000 > intervalTimeout) {
         LOGE("@%s, the flush() >%" PRId64 "ms, time spend:%" PRId64 "us",
             __FUNCTION__, intervalTimeout / 1000, interval / 1000);
         return 0; // TODO: after the performance issue is resolved, change it back to -ENODEV
     }

     return 0;
 }

 status_t RequestThread::handleExit()
 {
     if (mBlockAction != REQBLK_NONBLOCKING) {
         mBlockAction = REQBLK_NONBLOCKING;
         LOG1("%s: exit - replying", __FUNCTION__);
         mWaitRequest.Signal();
     }
     return OK;
 }

 status_t
 RequestThread::captureRequest(Camera3Request* request)
 {
     status_t status;
     CameraStream *stream = nullptr;

     status = mResultProcessor->registerRequest(request);
     if (status != NO_ERROR) {
         LOGE("Error registering request to result Processor- bug");
         return status;
     }

     status = mCameraHw->processRequest(request,mRequestsInHAL);
     if (status == REQBLK_WAIT_ALL_PREVIOUS_COMPLETED
         || status == REQBLK_WAIT_ONE_REQUEST_COMPLETED) {
         return status;
     }

     // handle output buffers

     const std::vector<CameraStream*>* outStreams = request->getOutputStreams();
     if (CC_UNLIKELY(outStreams == nullptr)) {
         LOGE("there is no output streams. this should not happen");
         return BAD_VALUE;
     }
     CameraStream* streamNode = nullptr;
     for (unsigned int i = 0; i < outStreams->size(); i++) {
         streamNode = outStreams->at(i);
         stream = static_cast<CameraStream *>(streamNode);
         stream->processRequest(request);
     }

     const CameraStream* inStream = request->getInputStream();
     if (inStream) {
         stream = static_cast<CameraStream*>(const_cast<CameraStream*>(inStream));
         status = stream->processRequest(request);
         CheckError(status != NO_ERROR, status, "%s, processRequest fails", __FUNCTION__);
     }

     return status;
 }

 bool RequestThread::areAllStreamsUnderMaxBuffers() const
 {
     std::vector<CameraStream*>::const_iterator it = mLocalStreams.begin();
     while (it != mLocalStreams.end()) {
         if ((*it)->outBuffersInHal() ==
             (int32_t) (*it)->getStream()->max_buffers)
             return false;

         ++it;
     }
     return true;
 }

 void RequestThread::deleteStreams(bool inactiveOnly)
 {
     CameraStream *s = nullptr;

     unsigned int i = 0;
     while (i < mStreams.size()) {
         s = static_cast<CameraStream*>(mStreams.at(i)->priv);

         if (!inactiveOnly || !s->isActive()) {
             delete s;
             mStreams.at(i)->priv = nullptr;
             mLocalStreams.erase(mLocalStreams.begin() + i);
             mStreams.erase(mStreams.begin() + i);
         } else {
             ++i;
         }
     }
 }

 void RequestThread::dump(int fd)
 {
     LOG2("@%s", __FUNCTION__);
 }

 } /* namespace intel */
 } /* namespace cros */
	/*
	* Copyright (C) 2014-2018 Intel Corporation
	*
	* 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 "RequestThread"

	#include "RequestThread.h"
	#include "ResultProcessor.h"
	#include "CameraMetadataHelper.h"
	#include "PlatformData.h"
	#include "PerformanceTraces.h"

	namespace cros {
	namespace intel {
	/**
	* Stream type value conversion. Android headers are missing this.
	*/
	const metadata_value_t streamTypeValues[] = {
	{ "OUTPUT", CAMERA3_STREAM_OUTPUT },
	{ "INPUT", CAMERA3_STREAM_INPUT },
	{ "BIDIRECTIONAL", CAMERA3_STREAM_BIDIRECTIONAL }
	};

	RequestThread::RequestThread(int cameraId, ICameraHw* aCameraHW)
	: mCameraId(cameraId),
	mCameraHw(aCameraHW),
	mRequestsInHAL(0),
	mWaitingRequest(nullptr),
	mBlockAction(REQBLK_NONBLOCKING),
	mInitialized(false),
	mResultProcessor(nullptr),
	mStreamSeqNo(0),
	mCameraThread("Cam3ReqThread"),
	mWaitRequest(base::WaitableEvent::ResetPolicy::MANUAL,
	base::WaitableEvent::InitialState::NOT_SIGNALED) {
	LOG1("@%s", __FUNCTION__);

	// Run Cam3ReqThread thread
	if (run() != OK) {
	LOGE("Failed to run Cam3ReqThread thread");
	}
	}

	RequestThread::~RequestThread()
	{
	deinit();
	}

	status_t
	RequestThread::init(const camera3_callback_ops_t *callback_ops)
	{
	LOG1("@%s", __FUNCTION__);

	mRequestsPool.init(MAX_REQUEST_IN_PROCESS_NUM);

	mResultProcessor = new ResultProcessor(this, callback_ops);
	mCameraHw->registerErrorCallback(mResultProcessor);
	mInitialized = true;
	return NO_ERROR;
	}

	status_t
	RequestThread::deinit()
	{
	if (!mInitialized) {
	return NO_ERROR;
	}

	if (mResultProcessor) {
	mCameraHw->registerErrorCallback(nullptr);
	mBlockAction = REQBLK_NONBLOCKING;
	mResultProcessor->requestExitAndWait();
	delete mResultProcessor;
	mResultProcessor = nullptr;
	}

	base::Callback<status_t()> closure =
	base::Bind(&RequestThread::handleExit, base::Unretained(this));
	mCameraThread.PostTaskAsync<status_t>(FROM_HERE, closure);

	mCameraThread.Stop();

	// Delete all streams
	for (unsigned int i = 0; i < mLocalStreams.size(); i++) {
	CameraStream *s = mLocalStreams.at(i);
	delete s;
	}

	mStreams.clear();
	mLocalStreams.clear();

	mWaitingRequest = nullptr;
	mBlockAction = REQBLK_NONBLOCKING;
	mRequestsPool.deInit();
	mInitialized = false;
	return NO_ERROR;
	}

	status_t RequestThread::run()
	{
	if (!mCameraThread.Start()) {
	LOGE("Camera thread failed to start");
	return UNKNOWN_ERROR;
	}
	return OK;
	}

	status_t
	RequestThread::configureStreams(camera3_stream_configuration_t *stream_list)
	{
	MessageConfigureStreams msg;
	msg.list = stream_list;

	status_t status = NO_ERROR;
	base::Callback<status_t()> closure =
	base::Bind(&RequestThread::handleConfigureStreams,
	base::Unretained(this),
	base::Passed(std::move(msg)));
	mCameraThread.PostTaskSync<status_t>(FROM_HERE, closure, &status);
	return status;
	}

	status_t RequestThread::handleConfigureStreams(MessageConfigureStreams msg)
	{
	LOG1("@%s", __FUNCTION__);

	status_t status = NO_ERROR;
	mLastSettings.clear();
	mWaitingRequest = nullptr;

	uint32_t streamsNum = msg.list->num_streams;
	int inStreamsNum = 0;
	int outStreamsNum = 0;
	uint32_t operation_mode = msg.list->operation_mode;
	camera3_stream_t *stream = nullptr;
	CameraStream * s = nullptr;
	LOG1("Received %d streams, operation mode %d :", streamsNum, operation_mode);
	if (operation_mode != CAMERA3_STREAM_CONFIGURATION_NORMAL_MODE &&
	operation_mode != CAMERA3_STREAM_CONFIGURATION_CONSTRAINED_HIGH_SPEED_MODE) {
	LOGE("Unknown operation mode %d!", operation_mode);
	return BAD_VALUE;
	}
	// Check number and type of streams
	for (uint32_t i = 0; i < streamsNum; i++) {
	stream = msg.list->streams[i];
	LOG1("Config stream (%s): %dx%d, fmt %s, usage %d, max buffers:%d, priv %p",
	METAID2STR(streamTypeValues, stream->stream_type),
	stream->width, stream->height,
	METAID2STR(android_scaler_availableFormats_values, stream->format),
	stream->usage,
	stream->max_buffers, stream->priv);
	if (stream->stream_type == CAMERA3_STREAM_OUTPUT)
	outStreamsNum++;
	else if (stream->stream_type == CAMERA3_STREAM_INPUT)
	inStreamsNum++;
	else if (stream->stream_type == CAMERA3_STREAM_BIDIRECTIONAL) {
	inStreamsNum++;
	outStreamsNum++;
	} else {
	LOGE("Unknown stream type %d!", stream->stream_type);
	return BAD_VALUE;
	}
	if (inStreamsNum > 1) {
	LOGE("Too many input streams : %d !", inStreamsNum);
	return BAD_VALUE;
	}
	}

	if (!outStreamsNum) {
	LOGE("No output streams!");
	return BAD_VALUE;
	}

	// Mark all streams as NOT active
	for (unsigned int i = 0; i < mStreams.size(); i++) {
	s = (CameraStream *)(mStreams.at(i)->priv);
	s->setActive(false);
	}

	// Create for new streams
	for (uint32_t i = 0; i < streamsNum; i++) {
	stream = msg.list->streams[i];
	if (!stream->priv) {
	mStreams.push_back(stream);
	CameraStream* localStream = new CameraStream(mStreamSeqNo, stream, mResultProcessor);
	mLocalStreams.push_back(localStream);
	localStream->setActive(true);
	stream->priv = localStream;
	mStreamSeqNo++;
	} else {
	static_cast<CameraStream *>(stream->priv)->setActive(true);
	}
	}

	// Delete inactive streams
	deleteStreams(true);

	status = mCameraHw->configStreams(mStreams, operation_mode);
	if (status != NO_ERROR) {
	LOGE("Error configuring the streams @%s:%d", __FUNCTION__, __LINE__);
	// delete all streams
	deleteStreams(false);
	return status;
	}

	std::vector<CameraStream*> activeStreams;
	for (unsigned int i = 0; i < mStreams.size(); i++)
	activeStreams.push_back(static_cast<CameraStream*>(mStreams.at(i)->priv));

	return status;

	}

	status_t
	RequestThread::constructDefaultRequest(int type,
	camera_metadata_t** meta)
	{
	MessageConstructDefaultRequest msg;
	msg.type= type;
	msg.request = meta;
	status_t status = NO_ERROR;
	base::Callback<status_t()> closure =
	base::Bind(&RequestThread::handleConstructDefaultRequest,
	base::Unretained(this),
	base::Passed(std::move(msg)));
	mCameraThread.PostTaskSync<status_t>(FROM_HERE, closure, &status);
	return status;
	}

	status_t
	RequestThread::handleConstructDefaultRequest(MessageConstructDefaultRequest msg)
	{
	LOG2("@%s", __FUNCTION__);
	int requestType = msg.type;
	const camera_metadata_t* defaultRequest;
	defaultRequest = mCameraHw->getDefaultRequestSettings(requestType);
	(msg.request) = (camera_metadata_t)defaultRequest;

	return (*(msg.request)) ? NO_ERROR : NO_MEMORY;
	}

	status_t
	RequestThread::processCaptureRequest(camera3_capture_request_t *request)
	{
	MessageProcessCaptureRequest msg;
	msg.request3 = request;

	status_t status = NO_ERROR;
	base::Callback<status_t()> closure =
	base::Bind(&RequestThread::handleProcessCaptureRequest,
	base::Unretained(this),
	base::Passed(std::move(msg)));
	mCameraThread.PostTaskSync<status_t>(FROM_HERE, closure, &status);
	if (mBlockAction != REQBLK_NONBLOCKING) {
	mWaitRequest.Reset();
	mWaitRequest.Wait();
	}
	return status;
	}

	// NO_ERROR: request process is OK (waiting for ISP mode change or shutter)
	// BAD_VALUE: request is not correct
	// else: request process failed due to device error
	status_t
	RequestThread::handleProcessCaptureRequest(MessageProcessCaptureRequest msg)
	{
	LOG2("%s:", __FUNCTION__);
	status_t status = BAD_VALUE;

	Camera3Request *request;
	status = mRequestsPool.acquireItem(&request);
	if (status != NO_ERROR) {
	LOGE("Failed to acquire empty Request from the pool (%d)", status);
	return status;
	}
	// Request counter
	mRequestsInHAL++;
	PERFORMANCE_HAL_ATRACE_PARAM1("mRequestsInHAL", mRequestsInHAL);

	/**
	* Settings may be nullptr in repeating requests but not in the first one
	* check that now.
	*/
	if (msg.request3->settings) {
	MetadataHelper::dumpMetadata(msg.request3->settings);
	// This assignment implies a memcopy.
	// mLastSettings has a copy of the current settings
	mLastSettings = msg.request3->settings;
	} else if (mLastSettings.isEmpty()) {
	status = BAD_VALUE;
	LOGE("ERROR: nullptr settings for the first request!");
	goto badRequest;
	}

	status = request->init(msg.request3,
	mResultProcessor,
	mLastSettings, mCameraId);
	if (status != NO_ERROR) {
	LOGE("Failed to initialize Request (%d)", status);
	goto badRequest;
	}

	// HAL should block user to send this new request when:
	// 1. The count of requests in process reached the PSL capacity.
	// 2. When the request requires reconfiguring the ISP in a manner which
	// requires stopping the pipeline and emptying the driver from buffers
	// 3. when any of the streams has all buffers in HAL

	// Send for capture
	status = captureRequest(request);
	if (status == REQBLK_WAIT_ALL_PREVIOUS_COMPLETED \|\| status == REQBLK_WAIT_ONE_REQUEST_COMPLETED) {
	// Need ISP reconfiguration
	mWaitingRequest = request;
	mBlockAction = status;
	return NO_ERROR;
	} else if (status != NO_ERROR) {
	status = UNKNOWN_ERROR;
	goto badRequest;
	}

	if (!areAllStreamsUnderMaxBuffers()) {
	// Request Q is full
	mBlockAction = REQBLK_WAIT_ONE_REQUEST_COMPLETED;
	}
	return NO_ERROR;

	badRequest:
	request->deInit();
	mRequestsPool.releaseItem(request);
	mRequestsInHAL--;
	return status;
	}

	int
	RequestThread::returnRequest(Camera3Request* req)
	{
	MessageStreamOutDone msg;
	msg.request = req;
	msg.reqId = req->getId();

	base::Callback<status_t()> closure =
	base::Bind(&RequestThread::handleReturnRequest,
	base::Unretained(this), base::Passed(std::move(msg)));
	mCameraThread.PostTaskAsync<status_t>(FROM_HERE, closure);
	return 0;
	}

	status_t
	RequestThread::handleReturnRequest(MessageStreamOutDone msg)
	{
	Camera3Request* request = msg.request;
	status_t status = NO_ERROR;

	request->deInit();
	mRequestsPool.releaseItem(request);
	mRequestsInHAL--;
	// Check blocked request
	if (mBlockAction != REQBLK_NONBLOCKING) {
	if (mWaitingRequest != nullptr &&
	((mBlockAction == REQBLK_WAIT_ONE_REQUEST_COMPLETED) \|\|
	(mBlockAction == REQBLK_WAIT_ALL_PREVIOUS_COMPLETED && mRequestsInHAL == 1))) {
	status = captureRequest(mWaitingRequest);
	if (status != NO_ERROR) {
	mWaitingRequest->deInit();
	mRequestsPool.releaseItem(mWaitingRequest);
	mRequestsInHAL--;
	}
	mWaitingRequest = nullptr;
	}
	if (mWaitingRequest == nullptr) {
	if (areAllStreamsUnderMaxBuffers()) {
	mBlockAction = REQBLK_NONBLOCKING;
	mWaitRequest.Signal();
	}
	}
	}

	return 0;
	}

	/**
	* flush
	* if hal version >= CAMERA_DEVICE_API_VERSION_3_1, we need to support flush()
	* this is the implement for the dummy flush, it will wait all the request to
	* finish and then return.
	* flush() should only return when there are no more outstanding buffers or
	* requests left in the HAL.
	* flush() must return within 1000ms
	*/
	status_t RequestThread::flush(void)
	{
	// signal the PSL it should flush requests. PSL are free to complete the
	// results as they want to (with.

	mCameraHw->flush();

	nsecs_t startTime = systemTime();
	nsecs_t interval = 0;

	// wait 1000ms at most while there are requests in the HAL
	while (mRequestsInHAL > 0 && interval / 1000 <= 1000000) {
	usleep(10000); // wait 10ms
	interval = systemTime() - startTime;
	}

	LOG2("@%s, line:%d, mRequestsInHAL:%d, time spend:%" PRId64 "us",
	__FUNCTION__, __LINE__, mRequestsInHAL, interval / 1000);

	nsecs_t intervalTimeout = 1000000;
	if (interval / 1000 > intervalTimeout) {
	LOGE("@%s, the flush() >%" PRId64 "ms, time spend:%" PRId64 "us",
	__FUNCTION__, intervalTimeout / 1000, interval / 1000);
	return 0; // TODO: after the performance issue is resolved, change it back to -ENODEV
	}

	return 0;
	}

	status_t RequestThread::handleExit()
	{
	if (mBlockAction != REQBLK_NONBLOCKING) {
	mBlockAction = REQBLK_NONBLOCKING;
	LOG1("%s: exit - replying", __FUNCTION__);
	mWaitRequest.Signal();
	}
	return OK;
	}

	status_t
	RequestThread::captureRequest(Camera3Request* request)
	{
	status_t status;
	CameraStream *stream = nullptr;

	status = mResultProcessor->registerRequest(request);
	if (status != NO_ERROR) {
	LOGE("Error registering request to result Processor- bug");
	return status;
	}

	status = mCameraHw->processRequest(request,mRequestsInHAL);
	if (status == REQBLK_WAIT_ALL_PREVIOUS_COMPLETED
	\|\| status == REQBLK_WAIT_ONE_REQUEST_COMPLETED) {
	return status;
	}

	// handle output buffers

	const std::vector<CameraStream> outStreams = request->getOutputStreams();
	if (CC_UNLIKELY(outStreams == nullptr)) {
	LOGE("there is no output streams. this should not happen");
	return BAD_VALUE;
	}
	CameraStream* streamNode = nullptr;
	for (unsigned int i = 0; i < outStreams->size(); i++) {
	streamNode = outStreams->at(i);
	stream = static_cast<CameraStream *>(streamNode);
	stream->processRequest(request);
	}

	const CameraStream* inStream = request->getInputStream();
	if (inStream) {
	stream = static_cast<CameraStream>(const_cast<CameraStream>(inStream));
	status = stream->processRequest(request);
	CheckError(status != NO_ERROR, status, "%s, processRequest fails", __FUNCTION__);
	}

	return status;
	}

	bool RequestThread::areAllStreamsUnderMaxBuffers() const
	{
	std::vector<CameraStream*>::const_iterator it = mLocalStreams.begin();
	while (it != mLocalStreams.end()) {
	if ((*it)->outBuffersInHal() ==
	(int32_t) (*it)->getStream()->max_buffers)
	return false;

	++it;
	}
	return true;
	}

	void RequestThread::deleteStreams(bool inactiveOnly)
	{
	CameraStream *s = nullptr;

	unsigned int i = 0;
	while (i < mStreams.size()) {
	s = static_cast<CameraStream*>(mStreams.at(i)->priv);

	if (!inactiveOnly \|\| !s->isActive()) {
	delete s;
	mStreams.at(i)->priv = nullptr;
	mLocalStreams.erase(mLocalStreams.begin() + i);
	mStreams.erase(mStreams.begin() + i);
	} else {
	++i;
	}
	}
	}

	void RequestThread::dump(int fd)
	{
	LOG2("@%s", __FUNCTION__);
	}

	} /* namespace intel */
	} /* namespace cros */