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Bug 1184058 - AudioChannelAgent should be muted when used without a proper window object, r=alwu

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This commit is contained in:
Andrea Marchesini 2015-08-27 09:12:21 +01:00
parent b68734b7da
commit 338ccab7dc
1 changed files with 21 additions and 10 deletions
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13
dom/audiochannel/AudioChannelAgent.cpp
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@ -85,6 +85,8 @@ AudioChannelAgent::InitInternal(nsIDOMWindow* aWindow, int32_t aChannelType,
nsIAudioChannelAgentCallback *aCallback,
bool aUseWeakRef)
{
MOZ_ASSERT(aWindow);
// We syncd the enum of channel type between nsIAudioChannelAgent.idl and
// AudioChannelBinding.h the same.
MOZ_ASSERT(int(AUDIO_AGENT_CHANNEL_NORMAL) == int(AudioChannel::Normal) &&
@ -103,7 +105,6 @@ AudioChannelAgent::InitInternal(nsIDOMWindow* aWindow, int32_t aChannelType,
return NS_ERROR_FAILURE;
}
if (aWindow) {
nsCOMPtr<nsPIDOMWindow> pInnerWindow = do_QueryInterface(aWindow);
MOZ_ASSERT(pInnerWindow->IsInnerWindow());
mInnerWindowID = pInnerWindow->WindowID();
@ -114,6 +115,9 @@ AudioChannelAgent::InitInternal(nsIDOMWindow* aWindow, int32_t aChannelType,
if (mWindow) {
mWindow = mWindow->GetOuterWindow();
}
if (!mWindow) {
return NS_ERROR_FAILURE;
}
mAudioChannelType = aChannelType;
@ -134,6 +138,13 @@ NS_IMETHODIMP AudioChannelAgent::NotifyStartedPlaying(uint32_t aNotifyPlayback,
MOZ_ASSERT(aVolume);
MOZ_ASSERT(aMuted);
// Window-less AudioChannelAgents are muted by default.
if (!mWindow) {
*aVolume = 0;
*aMuted = true;
return NS_OK;
}
nsRefPtr<AudioChannelService> service = AudioChannelService::GetOrCreate();
if (mAudioChannelType == AUDIO_AGENT_CHANNEL_ERROR ||
service == nullptr || mIsRegToService) {