/** 
 * @file llaudiosourcevo.cpp
 * @author Douglas Soo, James Cook
 * @brief Audio sources attached to viewer objects
 *
 * $LicenseInfo:firstyear=2006&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llaudiosourcevo.h"

#include "llagentcamera.h"
#include "llmutelist.h"
#include "llviewerparcelmgr.h"

LLAudioSourceVO::LLAudioSourceVO(const LLUUID &sound_id, const LLUUID& owner_id, const F32 gain, LLViewerObject *objectp)
	:	LLAudioSource(sound_id, owner_id, gain, LLAudioEngine::AUDIO_TYPE_SFX), 
	mObjectp(objectp)
{
	update();
}

LLAudioSourceVO::~LLAudioSourceVO()
{
	if (mObjectp)
	{
		mObjectp->clearAttachedSound();
	}
	mObjectp = NULL;
}

void LLAudioSourceVO::setGain(const F32 gain)
{
	mGain = llclamp(gain, 0.f, 1.f);
}

void LLAudioSourceVO::updateMute()
{
	if (!mObjectp || mObjectp->isDead())
	{
	  	mSourceMuted = true;
		return;
	}

	bool mute = false;
	LLVector3d pos_global;

	if (mObjectp->isAttachment())
	{
		LLViewerObject* parent = mObjectp;
		while (parent && !parent->isAvatar())
		{
			parent = (LLViewerObject*)parent->getParent();
		}
		if (parent)
		{
			pos_global = parent->getPositionGlobal();
		}
	}
	else
	{
		pos_global = mObjectp->getPositionGlobal();
	}

	if (!LLViewerParcelMgr::getInstance()->canHearSound(pos_global))
	{
		mute = true;
	}

	if (!mute)
	{
		if (LLMuteList::getInstance()->isMuted(mObjectp->getID()))
		{
			mute = true;
		}
		else if (LLMuteList::getInstance()->isMuted(mOwnerID, LLMute::flagObjectSounds))
		{
			mute = true;
		}
		else if (mObjectp->isAttachment())
		{
			LLViewerObject* parent = mObjectp;
			while (parent && !parent->isAvatar())
			{
				parent = (LLViewerObject*)parent->getParent();
			}
			if (parent 
				&& LLMuteList::getInstance()->isMuted(parent->getID()))
			{
				mute = true;
			}
		}
	}

	if (mute != mSourceMuted)
	{
		mSourceMuted = mute;
		if (mSourceMuted)
		{
		  	// Stop the sound.
			this->play(LLUUID::null);
		}
		else
		{
		  	// Muted sounds keep there data at all times, because
			// it's the place where the audio UUID is stored.
			// However, it's possible that mCurrentDatap is
			// NULL when this source did only preload sounds.
			if (mCurrentDatap)
			{
		  		// Restart the sound.
				this->play(mCurrentDatap->getID());
			}
		}
	}
}

void LLAudioSourceVO::update()
{
	updateMute();

	if (!mObjectp)
	{
		return;
	}

	if (mObjectp->isDead())
	{
		mObjectp = NULL;
		return;
	}

	if (mSourceMuted)
	{
	  	return;
	}

	if (mObjectp->isHUDAttachment())
	{
		mPositionGlobal = gAgentCamera.getCameraPositionGlobal();
	}
	else
	{
		mPositionGlobal = mObjectp->getPositionGlobal();
	}
	if (mObjectp->getSubParent())
	{
		mVelocity = mObjectp->getSubParent()->getVelocity();
	}
	else
	{
		mVelocity = mObjectp->getVelocity();
	}

	LLAudioSource::update();
}