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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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_
#include "mozilla/ReentrantMonitor.h"
namespace mozilla {
struct FrameStatisticsData
{
// Number of frames parsed and demuxed from media.
// Access protected by mReentrantMonitor.
uint64_t mParsedFrames = 0;
// Number of parsed frames which were actually decoded.
// Access protected by mReentrantMonitor.
uint64_t mDecodedFrames = 0;
// Number of decoded frames which were actually sent down the rendering
// pipeline to be painted ("presented"). Access protected by mReentrantMonitor.
uint64_t mPresentedFrames = 0;
// Number of frames that have been skipped because they have missed their
// composition deadline.
uint64_t mDroppedFrames = 0;
// Sum of all inter-keyframe segment durations, in microseconds.
// Dividing by count will give the average inter-keyframe time.
uint64_t mInterKeyframeSum_us = 0;
// Number of inter-keyframe segments summed so far.
size_t mInterKeyframeCount = 0;
// Maximum inter-keyframe segment duration, in microseconds.
uint64_t mInterKeyFrameMax_us = 0;
FrameStatisticsData() = default;
FrameStatisticsData(uint64_t aParsed, uint64_t aDecoded, uint64_t aDropped)
: mParsedFrames(aParsed)
, mDecodedFrames(aDecoded)
, mDroppedFrames(aDropped)
{}
void
Accumulate(const FrameStatisticsData& aStats)
{
mParsedFrames += aStats.mParsedFrames;
mDecodedFrames += aStats.mDecodedFrames;
mPresentedFrames += aStats.mPresentedFrames;
mDroppedFrames += aStats.mDroppedFrames;
mInterKeyframeSum_us += aStats.mInterKeyframeSum_us;
mInterKeyframeCount += aStats.mInterKeyframeCount;
// It doesn't make sense to add max numbers, instead keep the bigger one.
if (mInterKeyFrameMax_us < aStats.mInterKeyFrameMax_us) {
mInterKeyFrameMax_us = aStats.mInterKeyFrameMax_us;
}
}
};
// Frame decoding/painting related performance counters.
// Threadsafe.
class FrameStatistics
{
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FrameStatistics);
FrameStatistics()
: mReentrantMonitor("FrameStats")
{}
// Returns a copy of all frame statistics data.
// Can be called on any thread.
FrameStatisticsData GetFrameStatisticsData() const
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mFrameStatisticsData;
}
// Returns number of frames which have been parsed from the media.
// Can be called on any thread.
uint64_t GetParsedFrames() const
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mFrameStatisticsData.mParsedFrames;
}
// Returns the number of parsed frames which have been decoded.
// Can be called on any thread.
uint64_t GetDecodedFrames() const
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mFrameStatisticsData.mDecodedFrames;
}
// Returns the number of decoded frames which have been sent to the rendering
// pipeline for painting ("presented").
// Can be called on any thread.
uint64_t GetPresentedFrames() const
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mFrameStatisticsData.mPresentedFrames;
}
// Returns the number of frames that have been skipped because they have
// missed their composition deadline.
uint64_t GetDroppedFrames() const
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mFrameStatisticsData.mDroppedFrames;
}
// Increments the parsed and decoded frame counters by the passed in counts.
// Can be called on any thread.
void NotifyDecodedFrames(const FrameStatisticsData& aStats)
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
mFrameStatisticsData.Accumulate(aStats);
}
// Increments the presented frame counters.
// Can be called on any thread.
void NotifyPresentedFrame()
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
++mFrameStatisticsData.mPresentedFrames;
}
private:
~FrameStatistics() {}
// ReentrantMonitor to protect access of playback statistics.
mutable ReentrantMonitor mReentrantMonitor;
FrameStatisticsData mFrameStatisticsData;
};
} // namespace mozilla
#endif // FrameStatistics_h_
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