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Side by Side Diff: cc/frame_rate_counter.cc

Issue 11189043: cc: Rename cc classes and members to match filenames (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 8 years, 2 months ago
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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" 5 #include "config.h"
6 6
7 #include "CCFrameRateCounter.h" 7 #include "CCFrameRateCounter.h"
8 8
9 #include <cmath> 9 #include <cmath>
10 10
11 #include "CCProxy.h" 11 #include "CCProxy.h"
12 #include <public/Platform.h> 12 #include <public/Platform.h>
13 13
14 namespace cc { 14 namespace cc {
15 15
16 const double CCFrameRateCounter::kFrameTooFast = 1.0 / 70.0; // measured in seco nds 16 const double FrameRateCounter::kFrameTooFast = 1.0 / 70.0; // measured in second s
17 const double CCFrameRateCounter::kFrameTooSlow = 1.0 / 12.0; 17 const double FrameRateCounter::kFrameTooSlow = 1.0 / 12.0;
18 const double CCFrameRateCounter::kDroppedFrameTime = 1.0 / 50.0; 18 const double FrameRateCounter::kDroppedFrameTime = 1.0 / 50.0;
19 19
20 // safeMod works on -1, returning m-1 in that case. 20 // safeMod works on -1, returning m-1 in that case.
21 static inline int safeMod(int number, int modulus) 21 static inline int safeMod(int number, int modulus)
22 { 22 {
23 return (number + modulus) % modulus; 23 return (number + modulus) % modulus;
24 } 24 }
25 25
26 // static 26 // static
27 scoped_ptr<CCFrameRateCounter> CCFrameRateCounter::create() { 27 scoped_ptr<FrameRateCounter> FrameRateCounter::create() {
28 return make_scoped_ptr(new CCFrameRateCounter()); 28 return make_scoped_ptr(new FrameRateCounter());
29 } 29 }
30 30
31 inline base::TimeDelta CCFrameRateCounter::frameInterval(int frameNumber) const 31 inline base::TimeDelta FrameRateCounter::frameInterval(int frameNumber) const
32 { 32 {
33 return m_timeStampHistory[frameIndex(frameNumber)] - 33 return m_timeStampHistory[frameIndex(frameNumber)] -
34 m_timeStampHistory[frameIndex(frameNumber - 1)]; 34 m_timeStampHistory[frameIndex(frameNumber - 1)];
35 } 35 }
36 36
37 inline int CCFrameRateCounter::frameIndex(int frameNumber) const 37 inline int FrameRateCounter::frameIndex(int frameNumber) const
38 { 38 {
39 return safeMod(frameNumber, kTimeStampHistorySize); 39 return safeMod(frameNumber, kTimeStampHistorySize);
40 } 40 }
41 41
42 CCFrameRateCounter::CCFrameRateCounter() 42 FrameRateCounter::FrameRateCounter()
43 : m_currentFrameNumber(1) 43 : m_currentFrameNumber(1)
44 , m_droppedFrameCount(0) 44 , m_droppedFrameCount(0)
45 { 45 {
46 m_timeStampHistory[0] = base::TimeTicks::Now(); 46 m_timeStampHistory[0] = base::TimeTicks::Now();
47 m_timeStampHistory[1] = m_timeStampHistory[0]; 47 m_timeStampHistory[1] = m_timeStampHistory[0];
48 for (int i = 2; i < kTimeStampHistorySize; i++) 48 for (int i = 2; i < kTimeStampHistorySize; i++)
49 m_timeStampHistory[i] = base::TimeTicks(); 49 m_timeStampHistory[i] = base::TimeTicks();
50 } 50 }
51 51
52 void CCFrameRateCounter::markBeginningOfFrame(base::TimeTicks timestamp) 52 void FrameRateCounter::markBeginningOfFrame(base::TimeTicks timestamp)
53 { 53 {
54 m_timeStampHistory[frameIndex(m_currentFrameNumber)] = timestamp; 54 m_timeStampHistory[frameIndex(m_currentFrameNumber)] = timestamp;
55 base::TimeDelta frameIntervalSeconds = frameInterval(m_currentFrameNumber); 55 base::TimeDelta frameIntervalSeconds = frameInterval(m_currentFrameNumber);
56 56
57 if (CCProxy::hasImplThread() && m_currentFrameNumber > 0) { 57 if (Proxy::hasImplThread() && m_currentFrameNumber > 0) {
58 double drawDelayMs = frameIntervalSeconds.InMillisecondsF(); 58 double drawDelayMs = frameIntervalSeconds.InMillisecondsF();
59 WebKit::Platform::current()->histogramCustomCounts("Renderer4.Compositor ThreadImplDrawDelay", static_cast<int>(drawDelayMs), 1, 120, 60); 59 WebKit::Platform::current()->histogramCustomCounts("Renderer4.Compositor ThreadImplDrawDelay", static_cast<int>(drawDelayMs), 1, 120, 60);
60 } 60 }
61 61
62 if (!isBadFrameInterval(frameIntervalSeconds) && 62 if (!isBadFrameInterval(frameIntervalSeconds) &&
63 frameIntervalSeconds.InSecondsF() > kDroppedFrameTime) 63 frameIntervalSeconds.InSecondsF() > kDroppedFrameTime)
64 ++m_droppedFrameCount; 64 ++m_droppedFrameCount;
65 } 65 }
66 66
67 void CCFrameRateCounter::markEndOfFrame() 67 void FrameRateCounter::markEndOfFrame()
68 { 68 {
69 m_currentFrameNumber += 1; 69 m_currentFrameNumber += 1;
70 } 70 }
71 71
72 bool CCFrameRateCounter::isBadFrameInterval(base::TimeDelta intervalBetweenConse cutiveFrames) const 72 bool FrameRateCounter::isBadFrameInterval(base::TimeDelta intervalBetweenConsecu tiveFrames) const
73 { 73 {
74 bool schedulerAllowsDoubleFrames = !CCProxy::hasImplThread(); 74 bool schedulerAllowsDoubleFrames = !Proxy::hasImplThread();
75 bool intervalTooFast = schedulerAllowsDoubleFrames && intervalBetweenConsecu tiveFrames.InSecondsF() < kFrameTooFast; 75 bool intervalTooFast = schedulerAllowsDoubleFrames && intervalBetweenConsecu tiveFrames.InSecondsF() < kFrameTooFast;
76 bool intervalTooSlow = intervalBetweenConsecutiveFrames.InSecondsF() > kFram eTooSlow; 76 bool intervalTooSlow = intervalBetweenConsecutiveFrames.InSecondsF() > kFram eTooSlow;
77 return intervalTooFast || intervalTooSlow; 77 return intervalTooFast || intervalTooSlow;
78 } 78 }
79 79
80 bool CCFrameRateCounter::isBadFrame(int frameNumber) const 80 bool FrameRateCounter::isBadFrame(int frameNumber) const
81 { 81 {
82 return isBadFrameInterval(frameInterval(frameNumber)); 82 return isBadFrameInterval(frameInterval(frameNumber));
83 } 83 }
84 84
85 void CCFrameRateCounter::getAverageFPSAndStandardDeviation(double& averageFPS, d ouble& standardDeviation) const 85 void FrameRateCounter::getAverageFPSAndStandardDeviation(double& averageFPS, dou ble& standardDeviation) const
86 { 86 {
87 int frame = m_currentFrameNumber - 1; 87 int frame = m_currentFrameNumber - 1;
88 averageFPS = 0; 88 averageFPS = 0;
89 int averageFPSCount = 0; 89 int averageFPSCount = 0;
90 double fpsVarianceNumerator = 0; 90 double fpsVarianceNumerator = 0;
91 91
92 // Walk backwards through the samples looking for a run of good frame 92 // Walk backwards through the samples looking for a run of good frame
93 // timings from which to compute the mean and standard deviation. 93 // timings from which to compute the mean and standard deviation.
94 // 94 //
95 // Slow frames occur just because the user is inactive, and should be 95 // Slow frames occur just because the user is inactive, and should be
(...skipping 21 matching lines...) Expand all
117 --frame; 117 --frame;
118 if (frameIndex(frame) == frameIndex(m_currentFrameNumber) || frame < 0) { 118 if (frameIndex(frame) == frameIndex(m_currentFrameNumber) || frame < 0) {
119 // We've gone through all available historical data, so stop. 119 // We've gone through all available historical data, so stop.
120 break; 120 break;
121 } 121 }
122 } 122 }
123 123
124 standardDeviation = sqrt(fpsVarianceNumerator / averageFPSCount); 124 standardDeviation = sqrt(fpsVarianceNumerator / averageFPSCount);
125 } 125 }
126 126
127 base::TimeTicks CCFrameRateCounter::timeStampOfRecentFrame(int n) 127 base::TimeTicks FrameRateCounter::timeStampOfRecentFrame(int n)
128 { 128 {
129 ASSERT(n >= 0 && n < kTimeStampHistorySize); 129 ASSERT(n >= 0 && n < kTimeStampHistorySize);
130 int desiredIndex = (frameIndex(m_currentFrameNumber) + n) % kTimeStampHistor ySize; 130 int desiredIndex = (frameIndex(m_currentFrameNumber) + n) % kTimeStampHistor ySize;
131 return m_timeStampHistory[desiredIndex]; 131 return m_timeStampHistory[desiredIndex];
132 } 132 }
133 133
134 } // namespace cc 134 } // namespace cc
135 135
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