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/**
* Copyright (C) 2022 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.
*/
#include <StreamScheduler.h>
#include <ImsMediaTrace.h>
#include <stdint.h>
#include <chrono>
#include <thread>
#include <algorithm>
using namespace std::chrono;
#define RUN_WAIT_TIMEOUT_MS 1
#define STOP_WAIT_TIMEOUT_MS 1000
StreamScheduler::StreamScheduler() {}
StreamScheduler::~StreamScheduler()
{
Stop();
}
void StreamScheduler::RegisterNode(BaseNode* pNode)
{
if (pNode == nullptr)
{
return;
}
IMLOGD2("[RegisterNode] [%p], node[%s]", this, pNode->GetNodeName());
std::lock_guard<std::mutex> guard(mMutex);
mlistRegisteredNode.push_back(pNode);
}
void StreamScheduler::DeRegisterNode(BaseNode* pNode)
{
if (pNode == nullptr)
{
return;
}
IMLOGD2("[DeRegisterNode] [%p], node[%s]", this, pNode->GetNodeName());
std::lock_guard<std::mutex> guard(mMutex);
mlistRegisteredNode.remove(pNode);
}
void StreamScheduler::Start()
{
IMLOGD1("[Start] [%p] enter", this);
for (auto& node : mlistRegisteredNode)
{
if (node != nullptr)
{
IMLOGD2("[Start] [%p] registered node [%s]", this, node->GetNodeName());
}
}
if (!mlistRegisteredNode.empty())
{
IMLOGD1("[Start] [%p] Start thread", this);
StartThread();
}
IMLOGD1("[Start] [%p] exit", this);
}
void StreamScheduler::Stop()
{
IMLOGD1("[Stop] [%p] enter", this);
if (!IsThreadStopped())
{
StopThread();
Awake();
mConditionExit.wait_timeout(STOP_WAIT_TIMEOUT_MS);
}
IMLOGD1("[Stop] [%p] exit", this);
}
void StreamScheduler::Awake()
{
mConditionMain.signal();
}
void StreamScheduler::RunRegisteredNode()
{
// the list to contain non-source type node
std::list<BaseNode*> listNodesToRun;
for (auto& node : mlistRegisteredNode)
{
if (node != nullptr && node->GetState() == kNodeStateRunning && !node->IsRunTime())
{
if (node->IsSourceNode()) // process the source node
{
node->ProcessData();
}
else if (node->GetDataCount() > 0)
{
listNodesToRun.push_back(node); // store node to run
}
}
}
while (!listNodesToRun.empty())
{
std::list<BaseNode*>::iterator maxNode =
std::max_element(listNodesToRun.begin(), listNodesToRun.end(),
[=](BaseNode* a, BaseNode* b)
{
return a->GetDataCount() < b->GetDataCount();
});
if (maxNode == listNodesToRun.end())
{
break;
}
(*maxNode)->ProcessData(); // process the non runtime node
if (IsThreadStopped())
{
break;
}
listNodesToRun.remove(*maxNode);
};
}
void* StreamScheduler::run()
{
IMLOGD1("[run] [%p] enter", this);
// start nodes
mMutex.lock();
for (auto& node : mlistRegisteredNode)
{
if (node != nullptr && !node->IsRunTimeStart())
{
if (node->GetState() == kNodeStateStopped && node->ProcessStart() != RESULT_SUCCESS)
{
// TODO: report error
IMLOGE0("[run] error");
}
}
}
mMutex.unlock();
while (!IsThreadStopped())
{
mMutex.lock();
RunRegisteredNode();
mMutex.unlock();
if (IsThreadStopped())
{
break;
}
mConditionMain.wait_timeout(RUN_WAIT_TIMEOUT_MS);
}
mConditionExit.signal();
IMLOGD1("[run] [%p] exit", this);
return nullptr;
}
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