Fixed a shutdown crash in LLAudioEngine::assetCallback, and fixed behavior when soundsource re-issues a sound whilst a sound is currently playing for same source. (LLAudioChannel[Impl]::play now re-starts sound if already playing)

indra/llaudio/llaudioengine.cpp

@@ -1249,6 +1249,9 @@ void LLAudioEngine::startNextTransfer()
 // static
 void LLAudioEngine::assetCallback(LLVFS *vfs, const LLUUID &uuid, LLAssetType::EType type, void *user_data, S32 result_code, LLExtStat ext_status)
 {
+	if(!gAudiop)
+		return;
+
 	if (result_code)
 	{
 		LL_INFOS("AudioEngine") << "Boom, error in audio file transfer: " << LLAssetStorage::getErrorString( result_code ) << " (" << result_code << ")" << LL_ENDL;
@@ -1469,6 +1472,19 @@ bool LLAudioSource::play(const LLUUID &audio_uuid)
 			return true;
 		}
 	}
+	else if(mCurrentDatap == adp)	//Desired sound did not change. Just re-play it.
+	{
+		if(getChannel() && getChannel()->isPlaying())
+			getChannel()->play();
+		return true;
+	}
+	else							//Desired sound did change. Release the old channel if set.
+	{
+		if(getChannel())
+			getChannel()->cleanup();
+		mPlayedOnce = false;		//Reset the played flag so the new sound is actually started up.
+	}
+
 	mCurrentDatap = adp;
 
 	// Make sure the audio engine knows that we want to request this sound.

indra/llaudio/llaudioengine_fmod.cpp

@@ -600,6 +600,12 @@ void LLAudioChannelFMOD::play()
 		llwarns << "Playing without a channelID, aborting" << llendl;
 		return;
 	}
+	
+	if(!FSOUND_IsPaused(mChannelID))
+	{
+		FSOUND_SetPaused(mChannelID, true);
+		FSOUND_SetCurrentPosition(mChannelID, 0);
+	}
 
 	if (!FSOUND_SetPaused(mChannelID, false))
 	{

indra/llaudio/llaudioengine_fmodex.cpp

@@ -823,6 +823,13 @@ void LLAudioChannelFMODEX::play()
 
 	gSoundCheck.assertActiveState(this,true);
 
+	bool paused=true;
+	Check_FMOD_Error(mChannelp->getPaused(&paused), "FMOD::Channel::getPaused");
+	if(!paused)
+	{
+		Check_FMOD_Error(mChannelp->setPaused(true), "FMOD::Channel::setPaused");
+		Check_FMOD_Error(mChannelp->setPosition(0,FMOD_TIMEUNIT_PCMBYTES), "FMOD::Channel::setPosition");
+	}
 	Check_FMOD_Error(mChannelp->setPaused(false), "FMOD::Channel::setPaused");
 
 	if(sVerboseDebugging)

indra/llaudio/llaudioengine_openal.cpp

@@ -199,11 +199,13 @@ void LLAudioChannelOpenAL::play()
 		return;
 	}
 
-	if(!isPlaying())
+	if(isPlaying())
 	{
-		alSourcePlay(mALSource);
-		getSource()->setPlayedOnce(true);
+		alSourceStop(mALSource);
 	}
+
+	alSourcePlay(mALSource);
+	getSource()->setPlayedOnce(true);
 }
 
 void LLAudioChannelOpenAL::playSynced(LLAudioChannel *channelp)

indra/newview/llviewerobject.cpp

@@ -4901,11 +4901,7 @@ void LLViewerObject::setAttachedSound(const LLUUID &audio_uuid, const LLUUID& ow
 		mAudioSourcep->setSyncMaster(flags & LL_SOUND_FLAG_SYNC_MASTER);
 		mAudioSourcep->setSyncSlave(flags & LL_SOUND_FLAG_SYNC_SLAVE);
 		mAudioSourcep->setQueueSounds(queue);
-		if(!queue) // stop any current sound first to avoid "farts of doom" (SL-1541) -MG
-		{
-			mAudioSourcep->play(LLUUID::null);
-		}
-		
+
 		// Play this sound if region maturity permits
 		if( gAgent.canAccessMaturityAtGlobal(this->getPositionGlobal()) )
 		{