media/base/android/test_statistics.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_BASE_ANDROID_TEST_STATISTICS_H_
   6 #define MEDIA_BASE_ANDROID_TEST_STATISTICS_H_
   7
   8 namespace media {
   9
  10 // Class that computes statistics: number of calls, minimum and maximum values.
  11 // It is used for in tests PTS statistics to verify that playback did actually
  12 // happen.
  13
  14 template <typename T>
  15 class Minimax {
  16  public:
  17   Minimax() : num_values_(0) {}
  18   ~Minimax() {}
  19
  20   void AddValue(const T& value) {
  21     if (num_values_ == 0)
  22       min_ = max_ = value;
  23     else if (value < min_)
  24       min_ = value;
  25     else if (max_ < value)
  26       max_ = value;
  27
  28     ++num_values_;
  29   }
  30
  31   void Clear() {
  32     min_ = T();
  33     max_ = T();
  34     num_values_ = 0;
  35   }
  36
  37   const T& min() const { return min_; }
  38   const T& max() const { return max_; }
  39   int num_values() const { return num_values_; }
  40
  41  private:
  42   T min_;
  43   T max_;
  44   int num_values_;
  45 };
  46
  47 }  // namespace media
  48
  49 #endif  // MEDIA_BASE_ANDROID_TEST_STATISTICS_H_