gecko-dev/dom/media/FrameStatistics.h
2016-03-21 18:50:41 +13:00

97 lines
2.9 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef FrameStatistics_h_
#define FrameStatistics_h_
namespace mozilla {
// Frame decoding/painting related performance counters.
// Threadsafe.
class FrameStatistics {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FrameStatistics);
FrameStatistics() :
mReentrantMonitor("FrameStats"),
mParsedFrames(0),
mDecodedFrames(0),
mPresentedFrames(0),
mDroppedFrames(0) {}
// Returns number of frames which have been parsed from the media.
// Can be called on any thread.
uint32_t GetParsedFrames() {
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mParsedFrames;
}
// Returns the number of parsed frames which have been decoded.
// Can be called on any thread.
uint32_t GetDecodedFrames() {
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mDecodedFrames;
}
// Returns the number of decoded frames which have been sent to the rendering
// pipeline for painting ("presented").
// Can be called on any thread.
uint32_t GetPresentedFrames() {
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mPresentedFrames;
}
// Number of frames that have been skipped because they have missed their
// compoisition deadline.
uint32_t GetDroppedFrames() {
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mDroppedFrames;
}
// Increments the parsed and decoded frame counters by the passed in counts.
// Can be called on any thread.
void NotifyDecodedFrames(uint32_t aParsed, uint32_t aDecoded,
uint32_t aDropped) {
if (aParsed == 0 && aDecoded == 0 && aDropped == 0)
return;
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
mParsedFrames += aParsed;
mDecodedFrames += aDecoded;
mDroppedFrames += aDropped;
}
// Increments the presented frame counters.
// Can be called on any thread.
void NotifyPresentedFrame() {
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
++mPresentedFrames;
}
private:
~FrameStatistics() {}
// ReentrantMonitor to protect access of playback statistics.
ReentrantMonitor mReentrantMonitor;
// Number of frames parsed and demuxed from media.
// Access protected by mReentrantMonitor.
uint32_t mParsedFrames;
// Number of parsed frames which were actually decoded.
// Access protected by mReentrantMonitor.
uint32_t mDecodedFrames;
// Number of decoded frames which were actually sent down the rendering
// pipeline to be painted ("presented"). Access protected by mReentrantMonitor.
uint32_t mPresentedFrames;
uint32_t mDroppedFrames;
};
} // namespace mozilla
#endif