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Bug 778682. Part 2: Wait for NotifyHasCurrentData(true) callback on the input stream before entering HAVE_CURRENT_DATA for a media element. r=cpearce

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--HG--
extra : rebase_source : c6e2fd2f258fbacd767a62751a1d1db3ceea6dd0
This commit is contained in:
Robert O'Callahan 2012-09-20 12:47:50 +12:00
parent 402b08d6f4
commit e711b93859
1 changed files with 53 additions and 9 deletions
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62
content/html/content/src/nsHTMLMediaElement.cpp
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@ -2542,8 +2542,11 @@ class nsHTMLMediaElement::StreamListener : public MediaStreamListener {
public:
StreamListener(nsHTMLMediaElement* aElement) :
mElement(aElement),
mHaveCurrentData(false),
mBlocked(false),
mMutex("nsHTMLMediaElement::StreamListener"),
mPendingNotifyOutput(false)
mPendingNotifyOutput(false),
mDidHaveCurrentData(false)
{}
void Forget() { mElement = nullptr; }
@ -2554,17 +2557,22 @@ public:
mElement->PlaybackEnded();
}
}
void UpdateReadyStateForData()
{
if (mElement && mHaveCurrentData) {
mElement->UpdateReadyStateForData(
mBlocked ? NEXT_FRAME_UNAVAILABLE_BUFFERING : NEXT_FRAME_AVAILABLE);
}
}
void DoNotifyBlocked()
{
if (mElement) {
mElement->UpdateReadyStateForData(NEXT_FRAME_UNAVAILABLE_BUFFERING);
}
mBlocked = true;
UpdateReadyStateForData();
}
void DoNotifyUnblocked()
{
if (mElement) {
mElement->UpdateReadyStateForData(NEXT_FRAME_AVAILABLE);
}
mBlocked = false;
UpdateReadyStateForData();
}
void DoNotifyOutput()
{
@ -2572,10 +2580,19 @@ public:
MutexAutoLock lock(mMutex);
mPendingNotifyOutput = false;
}
if (mElement) {
if (mElement && mHaveCurrentData) {
mElement->FireTimeUpdate(true);
}
}
void DoNotifyHaveCurrentData()
{
mHaveCurrentData = true;
if (mElement) {
mElement->FirstFrameLoaded(false);
}
UpdateReadyStateForData();
DoNotifyOutput();
}
// These notifications run on the media graph thread so we need to
// dispatch events to the main thread.
@ -2595,6 +2612,22 @@ public:
NS_NewRunnableMethod(this, &StreamListener::DoNotifyFinished);
aGraph->DispatchToMainThreadAfterStreamStateUpdate(event);
}
virtual void NotifyHasCurrentData(MediaStreamGraph* aGraph,
bool aHasCurrentData)
{
MutexAutoLock lock(mMutex);
if (mDidHaveCurrentData == aHasCurrentData)
return;
mDidHaveCurrentData = aHasCurrentData;
// Ignore the case where aHasCurrentData is false. If aHasCurrentData
// changes from true to false, we don't worry about it. Video elements
// preserve the last played frame anyway.
if (aHasCurrentData) {
nsCOMPtr<nsIRunnable> event =
NS_NewRunnableMethod(this, &StreamListener::DoNotifyHaveCurrentData);
aGraph->DispatchToMainThreadAfterStreamStateUpdate(event);
}
}
virtual void NotifyOutput(MediaStreamGraph* aGraph)
{
MutexAutoLock lock(mMutex);
@ -2607,10 +2640,15 @@ public:
}
private:
// These fields may only be accessed on the main thread
nsHTMLMediaElement* mElement;
bool mHaveCurrentData;
bool mBlocked;
// mMutex protects the fields below; they can be accessed on any thread
Mutex mMutex;
bool mPendingNotifyOutput;
bool mDidHaveCurrentData;
};
void nsHTMLMediaElement::SetupSrcMediaStreamPlayback()
@ -2638,7 +2676,11 @@ void nsHTMLMediaElement::SetupSrcMediaStreamPlayback()
ChangeReadyState(nsIDOMHTMLMediaElement::HAVE_METADATA);
DispatchAsyncEvent(NS_LITERAL_STRING("durationchange"));
DispatchAsyncEvent(NS_LITERAL_STRING("loadedmetadata"));
ResourceLoaded();
DispatchAsyncEvent(NS_LITERAL_STRING("suspend"));
mNetworkState = nsIDOMHTMLMediaElement::NETWORK_IDLE;
AddRemoveSelfReference();
// FirstFrameLoaded(false) will be called when the stream has current data,
// to complete the setup by entering the HAVE_CURRENT_DATA state.
}
void nsHTMLMediaElement::EndSrcMediaStreamPlayback()
@ -2769,6 +2811,8 @@ void nsHTMLMediaElement::FirstFrameLoaded(bool aResourceFullyLoaded)
void nsHTMLMediaElement::ResourceLoaded()
{
NS_ASSERTION(!mSrcStream, "Don't call this for streams");
mBegun = false;
mNetworkState = nsIDOMHTMLMediaElement::NETWORK_IDLE;
AddRemoveSelfReference();