mirror of
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137 lines
3.0 KiB
C++
137 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// We want this available in opt builds
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#define FORCE_PR_LOG
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#include "Latency.h"
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#include "nsThreadUtils.h"
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#include <prlog.h>
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#include <cmath>
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#include <algorithm>
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#include <mozilla/StaticPtr.h>
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using namespace mozilla;
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const char* LatencyLogIndex2Strings[] = {
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"Audio MediaStreamTrack",
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"Video MediaStreamTrack",
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"Cubeb",
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"AudioStream",
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"NetStat"
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};
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static StaticRefPtr<AsyncLatencyLogger> gAsyncLogger;
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PRLogModuleInfo*
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GetLatencyLog()
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{
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static PRLogModuleInfo* sLog;
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if (!sLog) {
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sLog = PR_NewLogModule("MediaLatency");
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}
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return sLog;
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}
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class LogEvent : public nsRunnable
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{
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public:
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LogEvent(AsyncLatencyLogger::LatencyLogIndex aIndex, uint64_t aID, int64_t aValue) :
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mIndex(aIndex),
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mID(aID),
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mValue(aValue)
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{}
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~LogEvent() {}
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NS_IMETHOD Run() {
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AsyncLatencyLogger::Get(true)->WriteLog(mIndex, mID, mValue);
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return NS_OK;
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}
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protected:
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AsyncLatencyLogger::LatencyLogIndex mIndex;
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uint64_t mID;
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int64_t mValue;
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};
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// This is the only function that clients should use.
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void LogLatency(AsyncLatencyLogger::LatencyLogIndex aIndex, uint64_t aID, int64_t aValue)
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{
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AsyncLatencyLogger::Get()->Log(aIndex, aID, aValue);
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}
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void AsyncLatencyLogger::InitializeStatics()
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{
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NS_ASSERTION(NS_IsMainThread(), "Main thread only");
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GetLatencyLog();
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gAsyncLogger = new AsyncLatencyLogger();
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}
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void AsyncLatencyLogger::Shutdown()
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{
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gAsyncLogger = nullptr;
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}
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/* static */
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AsyncLatencyLogger* AsyncLatencyLogger::Get(bool aStartTimer)
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{
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if (aStartTimer) {
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gAsyncLogger->Init();
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}
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return gAsyncLogger;
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}
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AsyncLatencyLogger::AsyncLatencyLogger()
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: mThread(nullptr),
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mMutex("AsyncLatencyLogger")
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{ }
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AsyncLatencyLogger::~AsyncLatencyLogger()
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{
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MutexAutoLock lock(mMutex);
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if (mThread) {
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mThread->Shutdown();
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}
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mStart = TimeStamp();
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}
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void AsyncLatencyLogger::Init()
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{
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MutexAutoLock lock(mMutex);
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if (mStart.IsNull()) {
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mStart = TimeStamp::Now();
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nsresult rv = NS_NewNamedThread("Latency Logger", getter_AddRefs(mThread));
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NS_ENSURE_SUCCESS_VOID(rv);
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}
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}
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// aID is a sub-identifier (in particular a specific MediaStramTrack)
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void AsyncLatencyLogger::WriteLog(LatencyLogIndex aIndex, uint64_t aID, int64_t aValue)
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{
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PR_LOG(GetLatencyLog(), PR_LOG_DEBUG,
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("%s,%llu,%lld.,%lld.",
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LatencyLogIndex2Strings[aIndex], aID, GetTimeStamp(), aValue));
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}
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int64_t AsyncLatencyLogger::GetTimeStamp()
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{
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TimeDuration t = TimeStamp::Now() - mStart;
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return t.ToMilliseconds();
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}
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void AsyncLatencyLogger::Log(LatencyLogIndex aIndex, uint64_t aID, int64_t aValue)
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{
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if (PR_LOG_TEST(GetLatencyLog(), PR_LOG_DEBUG)) {
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nsCOMPtr<nsIRunnable> event = new LogEvent(aIndex, aID, aValue);
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if (mThread) {
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mThread->Dispatch(event, NS_DISPATCH_NORMAL);
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}
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}
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}
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