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https://github.com/Team-Resurgent/XBMC4Xbox.git
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Rocky5
921f9fe9f8
If ever adding the XBMC4Xbox source to GitHub use "git add -f -A" or it wont add all the files.
88 lines
2.0 KiB
C++
88 lines
2.0 KiB
C++
/*
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* Copyright (C) 2005-2013 Team XBMC
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* http://xbmc.org
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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; either version 2, or (at your option)
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* any later version.
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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 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 XBMC; see the file COPYING. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#include "BitstreamStats.h"
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#ifdef _LINUX
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#include "linux/XTimeUtils.h"
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#endif
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LARGE_INTEGER BitstreamStats::m_tmFreq;
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BitstreamStats::BitstreamStats(unsigned int nEstimatedBitrate)
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{
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m_dBitrate = 0.0;
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m_dMaxBitrate = 0.0;
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m_dMinBitrate = -1.0;
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m_nBitCount = 0;
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m_nEstimatedBitrate = nEstimatedBitrate;
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m_tmStart.QuadPart = 0LL;
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if (m_tmFreq.QuadPart == 0LL)
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QueryPerformanceFrequency(&m_tmFreq);
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}
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BitstreamStats::~BitstreamStats()
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{
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}
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void BitstreamStats::AddSampleBytes(unsigned int nBytes)
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{
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AddSampleBits(nBytes*8);
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}
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void BitstreamStats::AddSampleBits(unsigned int nBits)
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{
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m_nBitCount += nBits;
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if (m_nBitCount >= m_nEstimatedBitrate)
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CalculateBitrate();
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}
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void BitstreamStats::Start()
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{
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m_nBitCount = 0;
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QueryPerformanceCounter(&m_tmStart);
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}
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void BitstreamStats::CalculateBitrate()
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{
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LARGE_INTEGER tmNow;
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QueryPerformanceCounter(&tmNow);
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double elapsed = (double)(tmNow.QuadPart - m_tmStart.QuadPart) / (double)m_tmFreq.QuadPart;
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// only update once every 2 seconds
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if (elapsed >= 2)
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{
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m_dBitrate = (double)m_nBitCount / elapsed;
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if (m_dBitrate > m_dMaxBitrate)
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m_dMaxBitrate = m_dBitrate;
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if (m_dBitrate < m_dMinBitrate || m_dMinBitrate == -1)
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m_dMinBitrate = m_dBitrate;
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Start();
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}
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}
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