1 /*
2  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #ifndef MODULES_AUDIO_PROCESSING_TEST_PERFORMANCE_TIMER_H_
12 #define MODULES_AUDIO_PROCESSING_TEST_PERFORMANCE_TIMER_H_
13 
14 #include <vector>
15 
16 #include "absl/types/optional.h"
17 #include "system_wrappers/include/clock.h"
18 
19 namespace webrtc {
20 namespace test {
21 
22 class PerformanceTimer {
23  public:
24   explicit PerformanceTimer(int num_frames_to_process);
25   ~PerformanceTimer();
26 
27   void StartTimer();
28   void StopTimer();
29 
30   double GetDurationAverage() const;
31   double GetDurationStandardDeviation() const;
32 
33   // These methods are the same as those above, but they ignore the first
34   // |number_of_warmup_samples| measurements.
35   double GetDurationAverage(size_t number_of_warmup_samples) const;
36   double GetDurationStandardDeviation(size_t number_of_warmup_samples) const;
37 
38  private:
39   webrtc::Clock* clock_;
40   absl::optional<int64_t> start_timestamp_us_;
41   std::vector<int64_t> timestamps_us_;
42 };
43 
44 }  // namespace test
45 }  // namespace webrtc
46 
47 #endif  // MODULES_AUDIO_PROCESSING_TEST_PERFORMANCE_TIMER_H_
48