mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-08-29 09:16:35 -04:00
238 lines
5.8 KiB
C++
238 lines
5.8 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2018 F4HKW //
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// for F4EXB / SDRAngel //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include "datvideostream.h"
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#include <stdio.h>
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DATVideostream::DATVideostream():
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m_objMutex(QMutex::NonRecursive)
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{
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cleanUp();
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m_intTotalReceived=0;
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m_intPacketReceived=0;
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m_intMemoryLimit = DefaultMemoryLimit;
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MultiThreaded=false;
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ThreadTimeOut=-1;
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m_objeventLoop.connect(this,SIGNAL(onDataAvailable()), &m_objeventLoop, SLOT(quit()),Qt::QueuedConnection);
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}
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DATVideostream::~DATVideostream()
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{
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m_objeventLoop.disconnect(this,SIGNAL(onDataAvailable()), &m_objeventLoop, SLOT(quit()));
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cleanUp();
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}
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void DATVideostream::cleanUp()
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{
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if(m_objFIFO.size()>0)
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{
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m_objFIFO.clear();
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}
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if(m_objeventLoop.isRunning())
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{
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m_objeventLoop.exit();
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}
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m_intBytesAvailable=0;
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m_intBytesWaiting=0;
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m_intQueueWaiting=0;
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m_intPercentBuffer=0;
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}
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bool DATVideostream::setMemoryLimit(int intMemoryLimit)
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{
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if(intMemoryLimit<=0)
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{
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return false;
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}
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m_intMemoryLimit=intMemoryLimit;
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return true;
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}
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int DATVideostream::pushData(const char * chrData, int intSize)
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{
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if(intSize<=0)
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{
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return 0;
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}
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m_objMutex.lock();
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m_intPacketReceived ++;
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m_intBytesWaiting += intSize;
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if(m_intBytesWaiting>m_intMemoryLimit)
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{
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m_intBytesWaiting -= m_objFIFO.dequeue().size();
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}
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m_objFIFO.enqueue(QByteArray(chrData,intSize));
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m_intBytesAvailable = m_objFIFO.head().size();
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m_intTotalReceived += intSize;
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m_intQueueWaiting=m_objFIFO.count();
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m_objMutex.unlock();
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if((m_objeventLoop.isRunning())
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&& (m_intQueueWaiting>=MinStackSize))
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{
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emit onDataAvailable();
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}
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if(m_intPacketReceived%MinStackSize==1)
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{
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m_intPercentBuffer = (100*m_intBytesWaiting)/m_intMemoryLimit;
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if(m_intPercentBuffer>100)
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{
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m_intPercentBuffer=100;
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}
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emit onDataPackets(&m_intQueueWaiting, &m_intBytesWaiting, &m_intPercentBuffer, &m_intTotalReceived);
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}
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return intSize;
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}
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bool DATVideostream::isSequential() const
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{
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return true;
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}
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qint64 DATVideostream::bytesAvailable() const
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{
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return m_intBytesAvailable;
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}
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void DATVideostream::close()
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{
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QIODevice::close();
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cleanUp();
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}
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bool DATVideostream::open(OpenMode mode)
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{
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//cleanUp();
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return QIODevice::open(mode);
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}
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//PROTECTED
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qint64 DATVideostream::readData(char *data, qint64 len)
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{
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QByteArray objCurrentArray;
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int intEffectiveLen=0;
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int intExpectedLen=0;
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int intThreadLoop=0;
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intExpectedLen = (int) len;
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if(intExpectedLen<=0)
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{
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return 0;
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}
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if(m_objeventLoop.isRunning())
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{
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return 0;
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}
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m_objMutex.lock();
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//DATA in FIFO ? -> Waiting for DATA
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if((m_objFIFO.isEmpty()) || (m_objFIFO.count()<MinStackSize))
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{
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m_objMutex.unlock();
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if(MultiThreaded==true)
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{
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intThreadLoop=0;
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while((m_objFIFO.isEmpty()) || (m_objFIFO.count()<MinStackSize))
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{
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QThread::msleep(5);
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intThreadLoop ++;
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if(ThreadTimeOut>=0)
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{
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if(intThreadLoop*5>ThreadTimeOut)
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{
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return -1;
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}
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}
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}
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}
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else
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{
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m_objeventLoop.exec();
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}
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m_objMutex.lock();
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}
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//Read DATA
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intEffectiveLen=m_objFIFO.head().size();
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if(intExpectedLen<intEffectiveLen)
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{
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//Partial Read
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objCurrentArray = m_objFIFO.head();
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memcpy((void *)data,objCurrentArray.constData(),intExpectedLen);
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m_objFIFO.head().remove(0,intExpectedLen);
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intEffectiveLen=intExpectedLen;
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m_intBytesWaiting -= intExpectedLen;
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}
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else
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{
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//Complete Read
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objCurrentArray = m_objFIFO.dequeue();
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memcpy((void *)data,objCurrentArray.constData(),intEffectiveLen);
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m_intBytesWaiting -= intEffectiveLen;
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}
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m_intQueueWaiting = m_objFIFO.count();
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m_intPercentBuffer = (100*m_intBytesWaiting)/m_intMemoryLimit;
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emit onDataPackets(&m_intQueueWaiting, &m_intBytesWaiting, &m_intPercentBuffer, &m_intTotalReceived);
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//Next available DATA
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m_intBytesAvailable = m_objFIFO.head().size();
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m_objMutex.unlock();
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return (qint64)intEffectiveLen;
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}
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qint64 DATVideostream::writeData(const char *data, qint64 len)
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{
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(void) data;
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(void) len;
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return 0;
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}
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qint64 DATVideostream::readLineData(char *data, qint64 maxSize)
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{
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(void) data;
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(void) maxSize;
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return 0;
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}
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