/**
 * @file llvieweraudio.h
 * @brief Audio functions that used to be in viewer.cpp
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * 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
 * $/LicenseInfo$
 */

#ifndef LL_VIEWERAUDIO_H
#define LL_VIEWERAUDIO_H

#include "llframetimer.h"
#include "llsingleton.h"

// comment out to turn off wind
#define kAUDIO_ENABLE_WIND
//#define kAUDIO_ENABLE_WATER 1 // comment out to turn off water

void init_audio();
void audio_update_volume(bool force_update = true);
void audio_update_listener();
void audio_update_wind(bool force_update = true);

class LLViewerAudio : public LLSingleton<LLViewerAudio>
{
    LLSINGLETON(LLViewerAudio);
    virtual ~LLViewerAudio();

public:

    enum EFadeState
    {
        FADE_IDLE,
        FADE_IN,
        FADE_OUT,
    };

    void startInternetStreamWithAutoFade(const std::string &streamURI);
    void stopInternetStreamWithAutoFade();

    bool onIdleUpdate();

    EFadeState getFadeState() { return mFadeState; }
    bool isDone() { return mDone; };
    F32 getFadeVolume();
    bool getForcedTeleportFade() { return mForcedTeleportFade; };
    void setForcedTeleportFade(bool fade) { mForcedTeleportFade = fade;} ;
    std::string getNextStreamURI() { return mNextStreamURI; };
    void setNextStreamURI(const std::string &stream) { mNextStreamURI = stream; } ;
    void setWasPlaying(bool playing) { mWasPlaying = playing;} ;

private:

    bool mDone;
    F32 mFadeTime;
    std::string mNextStreamURI;
    EFadeState mFadeState;
    LLFrameTimer stream_fade_timer;
    bool mIdleListnerActive;
    bool mForcedTeleportFade;
    bool mWasPlaying;
    boost::signals2::connection mTeleportFailedConnection;
    boost::signals2::connection mTeleportFinishedConnection;
    boost::signals2::connection mTeleportStartedConnection;

    void registerIdleListener();
    void deregisterIdleListener() { mIdleListnerActive = false; };
    void startFading();
    void onTeleportFailed();
    void onTeleportFinished(const LLVector3d& pos, const bool& local);
    void onTeleportStarted();
};

#endif //LL_VIEWER_H