content/browser/power_profiler/power_data_provider.h

   1 // Copyright 2014 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 CONTENT_BROWSER_POWER_PROFILER_POWER_DATA_PROVIDER_H_
   6 #define CONTENT_BROWSER_POWER_PROFILER_POWER_DATA_PROVIDER_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "content/browser/power_profiler/power_event.h"
  12
  13 namespace base {
  14 class TimeDelta;
  15 }  // namespace base
  16
  17 namespace content {
  18
  19 typedef std::vector<PowerEvent> PowerEventVector;
  20
  21 // A class used to get power usage.
  22 class PowerDataProvider {
  23  public:
  24   enum AccuracyLevel {
  25     High,
  26     Moderate,
  27     Low
  28   };
  29
  30   static scoped_ptr<PowerDataProvider> Create();
  31
  32   PowerDataProvider() {}
  33   virtual ~PowerDataProvider() {}
  34
  35   // Returns a vector of power events, one per type, for the types it supports.
  36   virtual PowerEventVector GetData() = 0;
  37
  38   // Returns sampling rate at which the provider can operate.
  39   virtual base::TimeDelta GetSamplingRate() = 0;
  40
  41   // Returns accuracy level of the provider.
  42   virtual AccuracyLevel GetAccuracyLevel() = 0;
  43 };
  44
  45 }  // namespace content
  46
  47 #endif  // CONTENT_BROWSER_POWER_PROFILER_POWER_DATA_PROVIDER_H_