sync with upstream

1 files changed, 40 insertions, 0 deletions

diff --git a/xbmc/utils/BitstreamStats.h b/xbmc/utils/BitstreamStats.h
new file mode 100644
index 0000000..13413c6
--- /dev/null
+++ b/xbmc/utils/BitstreamStats.h
@@ -0,0 +1,40 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+class BitstreamStats final
+{
+public:
+  // in order not to cause a performance hit, we should only check the clock when
+  // we reach m_nEstimatedBitrate bits.
+  // if this value is 1, we will calculate bitrate on every sample.
+  explicit BitstreamStats(unsigned int nEstimatedBitrate=(10240*8) /*10Kbit*/);
+
+  void AddSampleBytes(unsigned int nBytes);
+  void AddSampleBits(unsigned int nBits);
+
+  inline double GetBitrate()    const { return m_dBitrate; }
+  inline double GetMaxBitrate() const { return m_dMaxBitrate; }
+  inline double GetMinBitrate() const { return m_dMinBitrate; }
+
+  void Start();
+  void CalculateBitrate();
+
+private:
+  double m_dBitrate;
+  double m_dMaxBitrate;
+  double m_dMinBitrate;
+  unsigned int m_nBitCount;
+  unsigned int m_nEstimatedBitrate; // when we reach this amount of bits we check current bitrate.
+  int64_t m_tmStart;
+  static int64_t m_tmFreq;
+};
+