Home | History | Annotate | Download | only in power_profiler 
      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_
     48