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/* 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/. */
#include "CodecStatistics.h"
#include "CSFLog.h"
#include "mozilla/Telemetry.h"
using namespace mozilla;
using namespace webrtc;
// use the same tag as VideoConduit
static const char* logTag ="WebrtcVideoSessionConduit";
VideoCodecStatistics::VideoCodecStatistics(int channel,
ViECodec* codec) :
mChannel(channel),
mSentRawFrames(0),
mPtrViECodec(codec),
mEncoderDroppedFrames(0),
mDecoderDiscardedPackets(0),
mRegisteredEncode(false),
mRegisteredDecode(false),
mReceiveState(kReceiveStateInitial)
#ifdef MOZILLA_INTERNAL_API
, mRecoveredBeforeLoss(0)
, mRecoveredLosses(0)
#endif
{
MOZ_ASSERT(mPtrViECodec);
}
VideoCodecStatistics::~VideoCodecStatistics()
{
if (mRegisteredEncode) {
mPtrViECodec->DeregisterEncoderObserver(mChannel);
}
if (mRegisteredDecode) {
mPtrViECodec->DeregisterDecoderObserver(mChannel);
}
}
void VideoCodecStatistics::Register(bool encoder)
{
if (encoder && !mRegisteredEncode) {
mPtrViECodec->RegisterEncoderObserver(mChannel, *this);
mRegisteredEncode = true;
} else if (!encoder && !mRegisteredDecode) {
mPtrViECodec->RegisterDecoderObserver(mChannel, *this);
mRegisteredDecode = true;
}
}
void VideoCodecStatistics::OutgoingRate(const int video_channel,
const uint32_t framerate,
const uint32_t bitrate)
{
unsigned int keyFrames, deltaFrames;
mPtrViECodec->GetSendCodecStatistics(video_channel, keyFrames, deltaFrames);
uint32_t dropped = mSentRawFrames - (keyFrames + deltaFrames);
CSFLogDebug(logTag,
"encoder statistics - framerate: %u, bitrate: %u, dropped frames: %u",
framerate, bitrate, dropped);
mEncoderBitRate.Push(bitrate);
mEncoderFps.Push(framerate);
mEncoderDroppedFrames += dropped;
}
void VideoCodecStatistics::IncomingCodecChanged(const int video_channel,
const VideoCodec& video_codec)
{
CSFLogDebug(logTag,
"channel %d change codec to \"%s\" ",
video_channel, video_codec.plName);
}
void VideoCodecStatistics::IncomingRate(const int video_channel,
const unsigned int framerate,
const unsigned int bitrate)
{
unsigned int discarded = mPtrViECodec->GetDiscardedPackets(video_channel);
CSFLogDebug(logTag,
"decoder statistics - framerate: %u, bitrate: %u, discarded packets %u",
framerate, bitrate, discarded);
mDecoderBitRate.Push(bitrate);
mDecoderFps.Push(framerate);
mDecoderDiscardedPackets += discarded;
}
void VideoCodecStatistics::ReceiveStateChange(const int aChannel,
VideoReceiveState aState)
{
CSFLogDebug(logTag,"New state for %d: %d (was %d)", aChannel, aState, mReceiveState);
#ifdef MOZILLA_INTERNAL_API
if (mFirstDecodeTime.IsNull()) {
mFirstDecodeTime = TimeStamp::Now();
}
/*
* Invalid transitions:
* WaitingKey -> PreemptiveNACK
* DecodingWithErrors -> PreemptiveNACK
*/
switch (mReceiveState) {
case kReceiveStateNormal:
case kReceiveStateInitial:
// in a normal state
if (aState != kReceiveStateNormal && aState != kReceiveStateInitial) {
// no longer in a normal state
if (aState != kReceiveStatePreemptiveNACK) {
mReceiveFailureTime = TimeStamp::Now();
}
} // else Normal<->Initial transition
break;
default:
// not in a normal state
if (aState == kReceiveStateNormal || aState == kReceiveStateInitial) {
if (mReceiveState == kReceiveStatePreemptiveNACK) {
mRecoveredBeforeLoss++;
CSFLogError(logTag, "Video error avoided by NACK recovery");
} else if (!mReceiveFailureTime.IsNull()) { // safety
TimeDuration timeDelta = TimeStamp::Now() - mReceiveFailureTime;
CSFLogError(logTag, "Video error duration: %u ms",
static_cast<uint32_t>(timeDelta.ToMilliseconds()));
Telemetry::Accumulate(Telemetry::WEBRTC_VIDEO_ERROR_RECOVERY_MS,
static_cast<uint32_t>(timeDelta.ToMilliseconds()));
mRecoveredLosses++; // to calculate losses per minute
mTotalLossTime += timeDelta; // To calculate % time in recovery
}
} // else non-Normal to different non-normal transition
break;
}
#endif
mReceiveState = aState;
}
void VideoCodecStatistics::EndOfCallStats()
{
#ifdef MOZILLA_INTERNAL_API
if (!mFirstDecodeTime.IsNull()) {
TimeDuration callDelta = TimeStamp::Now() - mFirstDecodeTime;
if (callDelta.ToSeconds() != 0) {
uint32_t recovered_per_min = mRecoveredBeforeLoss/(callDelta.ToSeconds()/60);
CSFLogError(logTag, "Video recovery before error per min %u", recovered_per_min);
Telemetry::Accumulate(Telemetry::WEBRTC_VIDEO_RECOVERY_BEFORE_ERROR_PER_MIN,
recovered_per_min);
uint32_t err_per_min = mRecoveredLosses/(callDelta.ToSeconds()/60);
CSFLogError(logTag, "Video recovery after error per min %u", err_per_min);
Telemetry::Accumulate(Telemetry::WEBRTC_VIDEO_RECOVERY_AFTER_ERROR_PER_MIN,
err_per_min);
float percent = (mTotalLossTime.ToSeconds()*100)/callDelta.ToSeconds();
CSFLogError(logTag, "Video error time percentage %f%%", percent);
Telemetry::Accumulate(Telemetry::WEBRTC_VIDEO_DECODE_ERROR_TIME_PERMILLE,
static_cast<uint32_t>(percent*10));
}
}
#endif
}
void VideoCodecStatistics::SentFrame()
{
mSentRawFrames++;
}
void VideoCodecStatistics::Dump()
{
Dump(mEncoderBitRate, "encoder bitrate");
Dump(mEncoderFps, "encoder fps");
Dump(mDecoderBitRate, "decoder bitrate");
Dump(mDecoderFps, "decoder fps");
}
void VideoCodecStatistics::Dump(RunningStat& s, const char *name)
{
CSFLogDebug(logTag,
"%s, mean: %f, variance: %f, standard deviation: %f",
name, s.Mean(), s.Variance(), s.StandardDeviation());
}
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