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1 // Copyright 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "config.h" | |
6 | |
7 #include "cc/frame_rate_counter.h" | 5 #include "cc/frame_rate_counter.h" |
8 | 6 |
9 #include <cmath> | 7 #include <cmath> |
10 | 8 |
11 #include "base/metrics/histogram.h" | 9 #include "base/metrics/histogram.h" |
12 #include "cc/proxy.h" | 10 #include "cc/proxy.h" |
13 | 11 |
14 namespace cc { | 12 namespace cc { |
15 | 13 |
16 const double FrameRateCounter::kFrameTooFast = 1.0 / 70.0; // measured in second
s | 14 const double FrameRateCounter::kFrameTooFast = 1.0 / 70.0; // measured in second
s |
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126 | 124 |
127 base::TimeTicks FrameRateCounter::timeStampOfRecentFrame(int n) const | 125 base::TimeTicks FrameRateCounter::timeStampOfRecentFrame(int n) const |
128 { | 126 { |
129 DCHECK(n >= 0); | 127 DCHECK(n >= 0); |
130 DCHECK(n < kTimeStampHistorySize); | 128 DCHECK(n < kTimeStampHistorySize); |
131 int desiredIndex = (frameIndex(m_currentFrameNumber) + n) % kTimeStampHistor
ySize; | 129 int desiredIndex = (frameIndex(m_currentFrameNumber) + n) % kTimeStampHistor
ySize; |
132 return m_timeStampHistory[desiredIndex]; | 130 return m_timeStampHistory[desiredIndex]; |
133 } | 131 } |
134 | 132 |
135 } // namespace cc | 133 } // namespace cc |
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