gecko/content/media/Latency.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 MOZILLA_LATENCY_H
#define MOZILLA_LATENCY_H
#include "mozilla/TimeStamp.h"
#include "prlog.h"
#include "nsCOMPtr.h"
#include "nsIThread.h"
#include "mozilla/Monitor.h"
#include "nsISupportsImpl.h"
#include "nsObserverService.h"
class AsyncLatencyLogger;
class LogEvent;
PRLogModuleInfo* GetLatencyLog();
// This class is a singleton. It is refcounted.
class AsyncLatencyLogger : public nsIObserver
{
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOBSERVER
public:
enum LatencyLogIndex {
AudioMediaStreamTrack,
VideoMediaStreamTrack,
Cubeb,
AudioStream,
NetEQ,
_MAX_INDEX
};
void Log(LatencyLogIndex index, uint64_t aID, int64_t value);
void WriteLog(LatencyLogIndex index, uint64_t aID, int64_t value);
static AsyncLatencyLogger* Get(bool aStartTimer = false);
static void InitializeStatics();
// After this is called, the global log object may go away
static void ShutdownLogger();
private:
AsyncLatencyLogger();
virtual ~AsyncLatencyLogger();
int64_t GetTimeStamp();
void Init();
// Shut down the thread associated with this, and make sure it doesn't
// start up again.
void Shutdown();
// The thread on which the IO happens
nsCOMPtr<nsIThread> mThread;
// This can be initialized on multiple threads, but is protected by a
// monitor. After the initialization phase, it is accessed on the log
// thread only.
mozilla::TimeStamp mStart;
// This monitor protects mStart and mMediaLatencyLog for the
// initialization sequence. It is initialized at layout startup, and
// destroyed at layout shutdown.
mozilla::Mutex mMutex;
};
void LogLatency(AsyncLatencyLogger::LatencyLogIndex index, uint64_t aID, int64_t value);
#endif