xbmc/utils/BitstreamStats.h

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #pragma once
  10
  11 #include <stdint.h>
  12
  13 class BitstreamStats final
  14 {
  15 public:
  16   // in order not to cause a performance hit, we should only check the clock when
  17   // we reach m_nEstimatedBitrate bits.
  18   // if this value is 1, we will calculate bitrate on every sample.
  19   explicit BitstreamStats(unsigned int nEstimatedBitrate=(10240*8) /*10Kbit*/);
  20
  21   void AddSampleBytes(unsigned int nBytes);
  22   void AddSampleBits(unsigned int nBits);
  23
  24   inline double GetBitrate()    const { return m_dBitrate; }
  25   inline double GetMaxBitrate() const { return m_dMaxBitrate; }
  26   inline double GetMinBitrate() const { return m_dMinBitrate; }
  27
  28   void Start();
  29   void CalculateBitrate();
  30
  31 private:
  32   double m_dBitrate;
  33   double m_dMaxBitrate;
  34   double m_dMinBitrate;
  35   unsigned int m_nBitCount;
  36   unsigned int m_nEstimatedBitrate; // when we reach this amount of bits we check current bitrate.
  37   int64_t m_tmStart;
  38   static int64_t m_tmFreq;
  39 };
  40