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path: root/indra/newview/llviewerparcelmediaautoplay.cpp
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/**
 * @file llviewerparcelmediaautoplay.cpp
 * @author Karl Stiefvater
 * @brief timer to automatically play media in a parcel
 *
 * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
 * $License$
 */

#include "llviewerprecompiledheaders.h"
#include "llviewerparcelmediaautoplay.h"
#include "llviewerparcelmedia.h"
#include "llviewercontrol.h"
#include "llviewermedia.h"
#include "llparcel.h"
#include "llviewerparcelmgr.h"
#include "lluuid.h"
#include "message.h"
#include "llviewerimagelist.h"         // for texture stats
#include "llagent.h"

const F32 AUTOPLAY_TIME  = 5;          // how many seconds before we autoplay
const F32 AUTOPLAY_SIZE  = 24*24;      // how big the texture must be (pixel area) before we autoplay
const F32 AUTOPLAY_SPEED = 0.1f;        // how slow should the agent be moving to autoplay

LLViewerParcelMediaAutoPlay::LLViewerParcelMediaAutoPlay() :
	LLEventTimer(1),
	mPlayed(FALSE),
	mTimeInParcel(0)
{
}

static LLViewerParcelMediaAutoPlay *sAutoPlay = NULL;

// static
void LLViewerParcelMediaAutoPlay::initClass()
{
	if (!sAutoPlay)
		sAutoPlay = new LLViewerParcelMediaAutoPlay;
}

// static
void LLViewerParcelMediaAutoPlay::cleanupClass()
{
	if (sAutoPlay)
		delete sAutoPlay;
}

// static
void LLViewerParcelMediaAutoPlay::playStarted()
{
	if (sAutoPlay)
	{
		sAutoPlay->mPlayed = TRUE;
	}
}

BOOL LLViewerParcelMediaAutoPlay::tick()
{
	LLParcel *this_parcel = NULL;
	std::string this_media_url;
	LLUUID this_media_texture_id;
	S32 this_parcel_id = 0;
	
	if (gParcelMgr)
	{
		this_parcel = gParcelMgr->getAgentParcel();
	}

	if (this_parcel)
	{
		this_media_url = std::string(this_parcel->getMediaURL());

		this_media_texture_id = this_parcel->getMediaID();

		this_parcel_id = this_parcel->getLocalID();
	}

	if (this_parcel_id != mLastParcelID)
	{
		// we've entered a new parcel
		mPlayed    = FALSE;                   // we haven't autoplayed yet
		mTimeInParcel = 0;                    // reset our timer
		mLastParcelID = this_parcel_id;
	}

	mTimeInParcel += mPeriod;                 // increase mTimeInParcel by the amount of time between ticks

	if ((!mPlayed) &&                         // if we've never played
		(mTimeInParcel > AUTOPLAY_TIME) &&    // and if we've been here for so many seconds
		(this_media_url.size() != 0) &&       // and if the parcel has media
		(!LLViewerMedia::isMediaPlaying()))   // and if the media is not already playing
	{
		if (this_media_texture_id.notNull())  // and if the media texture is good
		{
			LLViewerImage *image = gImageList.getImage(this_media_texture_id, FALSE);

			F32 image_size = 0;
			
			if (image)
			{
				image_size = image->mMaxVirtualSize;
			}

			if (gAgent.getVelocity().magVec() < AUTOPLAY_SPEED) // and if the agent is stopped (slow enough)
			{
				if (image_size > AUTOPLAY_SIZE)    // and if the target texture is big enough on screen
				{
					if (this_parcel)
					{
						if (gSavedSettings.getBOOL("ParcelMediaAutoPlayEnable"))
						{
							// and last but not least, only play when autoplay is enabled
							LLViewerParcelMedia::play(this_parcel);
						}
					}

					mPlayed = TRUE;
				}
			}
		}
	}

	
	return FALSE; // continue ticking forever please.
}