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author | enne@chromium.org <enne@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-10-12 22:43:41 +0000 |
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committer | enne@chromium.org <enne@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-10-12 22:43:41 +0000 |
commit | cd57cc5a246367c2558fefa04ae9eca8f4d545d2 (patch) | |
tree | a2235045e9c5e4ff028d641b76f5d01aa5461b26 /cc/CCFrameRateCounter.h | |
parent | 3fe7ba055be580443445895c0ee01ada3b628487 (diff) | |
download | chromium_src-cd57cc5a246367c2558fefa04ae9eca8f4d545d2.zip chromium_src-cd57cc5a246367c2558fefa04ae9eca8f4d545d2.tar.gz chromium_src-cd57cc5a246367c2558fefa04ae9eca8f4d545d2.tar.bz2 |
[cc] Rename all cc/ filenames to Chromium style
BUG=155413
Review URL: https://codereview.chromium.org/11122003
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@161671 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'cc/CCFrameRateCounter.h')
-rw-r--r-- | cc/CCFrameRateCounter.h | 70 |
1 files changed, 2 insertions, 68 deletions
diff --git a/cc/CCFrameRateCounter.h b/cc/CCFrameRateCounter.h index 76b4224..1a4708c 100644 --- a/cc/CCFrameRateCounter.h +++ b/cc/CCFrameRateCounter.h @@ -2,71 +2,5 @@ // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. -#ifndef CCFrameRateCounter_h -#define CCFrameRateCounter_h - -#if USE(ACCELERATED_COMPOSITING) - -#include "base/basictypes.h" -#include <wtf/PassOwnPtr.h> - -namespace cc { - -// This class maintains a history of timestamps, and provides functionality to -// intelligently compute average frames per second (and standard deviation). -class CCFrameRateCounter { -public: - static PassOwnPtr<CCFrameRateCounter> create() - { - return adoptPtr(new CCFrameRateCounter()); - } - - void markBeginningOfFrame(double timestamp); - void markEndOfFrame(); - int currentFrameNumber() const { return m_currentFrameNumber; } - void getAverageFPSAndStandardDeviation(double& averageFPS, double& standardDeviation) const; - int timeStampHistorySize() const { return kTimeStampHistorySize; } - - // n = 0 returns the oldest frame retained in the history, - // while n = timeStampHistorySize() - 1 returns the timestamp most recent frame. - double timeStampOfRecentFrame(int /* n */); - - // This is a heuristic that can be used to ignore frames in a reasonable way. Returns - // true if the given frame interval is too fast or too slow, based on constant thresholds. - bool isBadFrameInterval(double intervalBetweenConsecutiveFrames) const; - - int droppedFrameCount() const { return m_droppedFrameCount; } - -private: - CCFrameRateCounter(); - - double frameInterval(int frameNumber) const; - int frameIndex(int frameNumber) const; - bool isBadFrame(int frameNumber) const; - - // Two thresholds (measured in seconds) that describe what is considered to be a "no-op frame" that should not be counted. - // - if the frame is too fast, then given our compositor implementation, the frame probably was a no-op and did not draw. - // - if the frame is too slow, then there is probably not animating content, so we should not pollute the average. - static const double kFrameTooFast; - static const double kFrameTooSlow; - - // If a frame takes longer than this threshold (measured in seconds) then we - // (naively) assume that it missed a screen refresh; that is, we dropped a frame. - // FIXME: Determine this threshold based on monitor refresh rate, crbug.com/138642. - static const double kDroppedFrameTime; - - static const int kTimeStampHistorySize = 120; - - int m_currentFrameNumber; - double m_timeStampHistory[kTimeStampHistorySize]; - - int m_droppedFrameCount; - - DISALLOW_COPY_AND_ASSIGN(CCFrameRateCounter); -}; - -} // namespace cc - -#endif // USE(ACCELERATED_COMPOSITING) - -#endif +// Temporary forwarding header +#include "cc/frame_rate_counter.h" |