gecko/dom/ipc/AudioChild.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=2 et tw=80 : */
2012-05-21 04:12:37 -07:00
/* 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 "mozilla/dom/AudioChild.h"
namespace mozilla {
namespace dom {
NS_IMPL_THREADSAFE_ADDREF(AudioChild);
NS_IMPL_THREADSAFE_RELEASE(AudioChild);
AudioChild::AudioChild()
: mLastPosition(-1),
mLastPositionTimestamp(0),
mWriteCounter(0),
mMinWriteSize(-2),// Initial value, -2, error on -1
mAudioReentrantMonitor("AudioChild.mReentrantMonitor"),
mIPCOpen(true),
mDrained(false)
{
MOZ_COUNT_CTOR(AudioChild);
}
AudioChild::~AudioChild()
{
MOZ_COUNT_DTOR(AudioChild);
}
void
AudioChild::ActorDestroy(ActorDestroyReason aWhy)
{
mIPCOpen = false;
}
bool
AudioChild::RecvPositionInFramesUpdate(const int64_t& position,
const int64_t& time)
{
mLastPosition = position;
mLastPositionTimestamp = time;
return true;
}
bool
AudioChild::RecvDrainDone()
{
ReentrantMonitorAutoEnter mon(mAudioReentrantMonitor);
mDrained = true;
mAudioReentrantMonitor.NotifyAll();
return true;
}
int32_t
AudioChild::WaitForMinWriteSize()
{
ReentrantMonitorAutoEnter mon(mAudioReentrantMonitor);
// -2 : initial value
while (mMinWriteSize == -2 && mIPCOpen) {
mAudioReentrantMonitor.Wait();
}
return mMinWriteSize;
}
bool
AudioChild::RecvMinWriteSizeDone(const int32_t& minFrames)
{
ReentrantMonitorAutoEnter mon(mAudioReentrantMonitor);
mMinWriteSize = minFrames;
mAudioReentrantMonitor.NotifyAll();
return true;
}
void
AudioChild::WaitForDrain()
{
ReentrantMonitorAutoEnter mon(mAudioReentrantMonitor);
while (!mDrained && mIPCOpen) {
mAudioReentrantMonitor.Wait();
}
}
bool
AudioChild::RecvWriteDone()
{
ReentrantMonitorAutoEnter mon(mAudioReentrantMonitor);
mWriteCounter += 1;
mAudioReentrantMonitor.NotifyAll();
return true;
}
void
AudioChild::WaitForWrite()
{
ReentrantMonitorAutoEnter mon(mAudioReentrantMonitor);
uint64_t writeCounter = mWriteCounter;
while (mWriteCounter == writeCounter && mIPCOpen) {
mAudioReentrantMonitor.Wait();
}
}
int64_t
AudioChild::GetLastKnownPosition()
{
return mLastPosition;
}
int64_t
AudioChild::GetLastKnownPositionTimestamp()
{
return mLastPositionTimestamp;
}
} // namespace dom
} // namespace mozilla