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authorenne@chromium.org <enne@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>2012-10-12 22:43:41 +0000
committerenne@chromium.org <enne@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>2012-10-12 22:43:41 +0000
commitcd57cc5a246367c2558fefa04ae9eca8f4d545d2 (patch)
treea2235045e9c5e4ff028d641b76f5d01aa5461b26 /cc/CCFrameRateCounter.h
parent3fe7ba055be580443445895c0ee01ada3b628487 (diff)
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[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.h70
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"