D:/opendownloadmanager/ODM-1.x/vmsSpeedTracker.cpp

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/*
  Free Download Manager Copyright (c) 2003-2007 FreeDownloadManager.ORG
  Open Download Manager Copyright (c) 2008-2010 OpenDownloadManager.ORG
*/        

#include "stdafx.h"
#include "vmsSpeedTracker.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif        

vmsSpeedTracker::vmsSpeedTracker()
{
        m_nLowSpeedFactor = 3;
        m_nLowSpeedDuration = 60;

        Reset ();
}

vmsSpeedTracker::~vmsSpeedTracker()
{

}

void vmsSpeedTracker::CurrentSpeedIs(int nSpeed)
{
        if (m_cAvrSpeedsAtStart < 20)
        {
                m_nAvrSpeedAtStart = (m_nAvrSpeedAtStart * m_cAvrSpeedsAtStart + nSpeed) / 
                        (m_cAvrSpeedsAtStart + 1);
                m_cAvrSpeedsAtStart++;

                LOG ("[speed] [measure " << (DWORD)m_cAvrSpeedsAtStart << "] avg: " << (DWORD)m_nAvrSpeedAtStart << nl);
        }
        else
        {
                LOG ("[speed] avg: " << (DWORD)m_nAvrSpeedAtStart << " current: " << (DWORD)nSpeed << nl);

                if (nSpeed == 0 || m_nAvrSpeedAtStart / nSpeed >= (UINT)m_nLowSpeedFactor)
                        m_cTooLowSpeeds++; 
                else
                        m_cTooLowSpeeds = 0; 
        }
}

bool vmsSpeedTracker::CheckCurrentSpeedTooLow()
{
        return m_cTooLowSpeeds > m_nLowSpeedDuration;
}

void vmsSpeedTracker::Reset()
{
        m_nAvrSpeedAtStart = 0;
        m_cAvrSpeedsAtStart = 0;
        m_cTooLowSpeeds = 0;
}

void vmsSpeedTracker::set_LowSpeedFactor(int i)
{
        if (i > 1)
                m_nLowSpeedFactor = i;
}

void vmsSpeedTracker::set_LowSpeedDuration(int i)
{
        if (i >= 60)
                m_nLowSpeedDuration = i;
}

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