//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: Soundscapes.txt resource file processor
//
//=============================================================================//


#include "cbase.h"
#include <keyvalues.h>
#include "engine/IEngineSound.h"
#include "filesystem.h"
#include "SoundEmitterSystem/isoundemittersystembase.h"
#include "soundchars.h"
#include "view.h"
#include "engine/ivdebugoverlay.h"
#include "tier0/icommandline.h"
#include "strtools.h"

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"

// Only allow recursive references to be 8 levels deep.
// This test will flag any circular references and bail.
#define MAX_SOUNDSCAPE_RECURSION	8

const float DEFAULT_SOUND_RADIUS = 36.0f;
// Keep an array of all looping sounds so they can be faded in/out
// OPTIMIZE: Get a handle/pointer to the engine's sound channel instead 
//			of searching each frame!
enum soundfadestyle_t
{
	FADE_VOLUME_LINEAR = 0,
	FADE_VOLUME_SINE = 1,
};

// contains a set of data to implement a simple envelope to fade in/out sounds
struct soundfader_t
{
	float m_flCurrent;
	float m_flTarget;
	float m_flRate;
	float m_flStart;
	float m_flFadeT;
	int	m_nType;

	bool IsFading()
	{
		return ( m_flCurrent != m_flTarget ) ? true : false;
	}

	void FadeToValue( float flTarget, float flRate, soundfadestyle_t fadeType )
	{
		m_flStart = m_flCurrent;
		m_flFadeT = 0;
		m_flTarget = flTarget;
		m_flRate = flRate;
		m_nType = fadeType;
	}

	void ForceToTargetValue( float flTarget )
	{
		m_flFadeT = 1.0f;
		m_flCurrent = m_flTarget = flTarget;
		m_flRate = 0;
	}

	void UpdateFade( float flDt )
	{
		m_flFadeT += flDt * m_flRate;
		if ( m_flFadeT >= 1.0f )
		{
			ForceToTargetValue( m_flTarget );
			return;
		}
		float flFactor = m_flFadeT;
		float flDelta = m_flTarget - m_flStart;
		switch ( m_nType )
		{
		case FADE_VOLUME_LINEAR:
			break;
		case FADE_VOLUME_SINE:
			if ( flDelta >= 0 )
			{
				flFactor = sin( m_flFadeT * M_PI * 0.5f );
			}
			else
			{
				flFactor = 1.0f - cos( m_flFadeT * M_PI * 0.5f );
			}
			break;
		}
		m_flCurrent = m_flStart + flDelta * flFactor;
	}
};

struct loopingsound_t
{
	Vector		position;		// position (if !isAmbient)
	const char *pWaveName;		// name of the wave file
	soundfader_t m_volume;
	soundlevel_t soundlevel;	// sound level (if !isAmbient)
	int			pitch;			// pitch shift
	int			id;				// Used to fade out sounds that don't belong to the most current setting
	int			engineGuid;
	float		radius;			// if set, sound plays at full volume inside the radius and fallsoff as you move out of the radius.  Sound will lose directionality as you move inside the radius
	bool		isAmbient;		// Ambient sounds have no spatialization - they play from everywhere
};

ConVar soundscape_fadetime( "soundscape_fadetime", "3.0", FCVAR_CHEAT, "Time to crossfade sound effects between soundscapes" );
ConVar soundscape_message("soundscape_message","0");
ConVar soundscape_radius_debug( "soundscape_radius_debug", "0", FCVAR_CHEAT, "Prints current volume of radius sounds" );

float GetSoundscapeFadeRate()
{
	float flFadeTime = soundscape_fadetime.GetFloat();
	float flFadeRate = 1.0f / (flFadeTime > 0 ? flFadeTime : 3.0f);

	return flFadeRate;
}

#include "tier2/interval.h"

struct randomsound_t
{
	Vector		position;
	float		nextPlayTime;	// time to play a sound from the set
	interval_t	time;
	interval_t	volume;
	interval_t	pitch;
	interval_t	soundlevel;
	float		masterVolume;
	int			waveCount;
	bool		isAmbient;
	bool		isRandom;
	KeyValues	*pWaves;

	void Init()
	{
		memset( this, 0, sizeof(*this) );
	}
};

struct subsoundscapeparams_t
{
	Vector  vForcedTextOriginAmbient;
	int		recurseLevel;		// test for infinite loops in the script / circular refs
	float	masterVolume;
	float	flFadeRate;
	int		startingPosition;
	int		positionOverride;	// forces all sounds to this position
	int		ambientPositionOverride;	// forces all ambient sounds to this position
	bool	allowDSP;
	bool	wroteSoundMixer;
	bool	wroteDSPVolume;
	bool	bForceTextOriginAmbient;
};

Vector getVectorFromString(const char *pString)
{
	char tempString[128];
	Q_strncpy( tempString, pString, sizeof(tempString) );

	Vector result;
	int i = 0;
	char *token = strtok( tempString, "," );
	while( token )
	{
		result[i] = atof( token );
		token = strtok( NULL, "," );
		i++;
	}
	return result;
}
class C_SoundscapeSystem : public CBaseGameSystemPerFrame
{
public:
	virtual char const *Name() { return "C_SoundScapeSystem"; }

	C_SoundscapeSystem()
	{
		m_nRestoreFrame = -1;
	}

	~C_SoundscapeSystem() {}

	void OnStopAllSounds()
	{
		for ( int hh = 0; hh < MAX_SPLITSCREEN_PLAYERS; ++hh )
		{
			ACTIVE_SPLITSCREEN_PLAYER_GUARD( hh );
			GetPerUser(hh).m_params.entIndex = 0;
			GetPerUser(hh).m_params.soundscapeIndex = -1;
			GetPerUser(hh).m_loopingSounds.Purge();
			GetPerUser(hh).m_randomSounds.Purge();
		}
	}

	// IClientSystem hooks, not needed
	virtual void LevelInitPreEntity()
	{
		Shutdown();
		Init();

		TouchSoundFiles();
	}

	virtual void LevelInitPostEntity() 
	{
		if ( !m_pSoundMixerVar )
		{
			m_pSoundMixerVar = (ConVar *)cvar->FindVar( "snd_soundmixer" );
		}
		if ( !m_pDSPVolumeVar )
		{
			m_pDSPVolumeVar = (ConVar *)cvar->FindVar( "dsp_volume" );
		}
	}

	// The level is shutdown in two parts
	virtual void LevelShutdownPreEntity() {}
	// Entities are deleted / released here...
	virtual void LevelShutdownPostEntity()
	{
		OnStopAllSounds();
	}

	virtual void OnSave() {}
	virtual void OnRestore()
	{
		m_nRestoreFrame = gpGlobals->framecount;
	}
	virtual void SafeRemoveIfDesired() {}

	// Called before rendering
	virtual void PreRender() { }

	// Called after rendering
	virtual void PostRender() { }

	// IClientSystem hooks used
	virtual bool Init();
	virtual void Shutdown();
	// Gets called each frame
	virtual void Update( float frametime );

	void PrintDebugInfo()
	{
		Msg( "\n------- CLIENT SOUNDSCAPES -------\n" );
		for ( int i=0; i < m_soundscapes.Count(); i++ )
		{
			Msg( "- %d: %s\n", i, m_soundscapes[i]->GetName() );
		}

		Split_t &slot = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT());

		if ( slot.m_forcedSoundscapeIndex )
		{
			Msg( "- PLAYING DEBUG SOUNDSCAPE: %d [%s]\n", slot.m_forcedSoundscapeIndex, SoundscapeNameByIndex(slot.m_forcedSoundscapeIndex) );
		}
		Msg( "- CURRENT SOUNDSCAPE: %d [%s]\n", slot.m_params.soundscapeIndex.Get(), SoundscapeNameByIndex(slot.m_params.soundscapeIndex) );
		Msg( "----------------------------------\n\n" );
	}


	// local functions
	void UpdateAudioParams( audioparams_t &audio );
	void GetAudioParams( audioparams_t &out ) const { out = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT()).m_params; }
	int GetCurrentSoundscape() 
	{ 
		Split_t &slot = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT());

		if ( slot.m_forcedSoundscapeIndex >= 0 )
			return slot.m_forcedSoundscapeIndex;
		return slot.m_params.soundscapeIndex; 
	}
	void DevReportSoundscapeName( int index );
	void UpdateLoopingSounds( float frametime );
	int AddLoopingAmbient( const char *pSoundName, float volume, int pitch, float radius, float flFadeRate );
	void UpdateLoopingSound( loopingsound_t &loopSound );
	void StopLoopingSound( loopingsound_t &loopSound );
	int AddLoopingSound( const char *pSoundName, bool isAmbient, float volume, 
		soundlevel_t soundLevel, int pitch, const Vector &position, float radius, float flFadeRate );
	int AddRandomSound( const randomsound_t &sound );
	void PlayRandomSound( randomsound_t &sound );
	void UpdateRandomSounds( float gameClock );
	Vector GenerateRandomSoundPosition();

	void ForceSoundscape( const char *pSoundscapeName, float radius );

	int FindSoundscapeByName( const char *pSoundscapeName );
	const char *SoundscapeNameByIndex( int index );
	KeyValues *SoundscapeByIndex( int index );

	// main-level soundscape processing, called on new soundscape
	void StartNewSoundscape( KeyValues *pSoundscape );
	void StartSubSoundscape( KeyValues *pSoundscape, subsoundscapeparams_t &params );

	// root level soundscape keys
	// add a process for each new command here
	// "dsp"
	void ProcessDSP( KeyValues *pDSP );
	// "dsp_player"
	void ProcessDSPPlayer( KeyValues *pDSPPlayer );
	// "fadetime"
	void ProcessSoundscapeFadetime( KeyValues *pKey, subsoundscapeparams_t &params );
	// "playlooping"
	void ProcessPlayLooping( KeyValues *pPlayLooping, const subsoundscapeparams_t &params );	
	// "playrandom"
	void ProcessPlayRandom( KeyValues *pPlayRandom, const subsoundscapeparams_t &params );
	// "playsoundscape"
	void ProcessPlaySoundscape( KeyValues *pPlaySoundscape, subsoundscapeparams_t &params );
	// "soundmixer"
	void ProcessSoundMixer( KeyValues *pSoundMixer, subsoundscapeparams_t &params );
	// "dsp_volume"
	void ProcessDSPVolume( KeyValues *pKey, subsoundscapeparams_t &params );


private:

	bool	IsBeingRestored() const
	{
		return gpGlobals->framecount == m_nRestoreFrame ? true : false;
	}

	void	AddSoundScapeFile( const char *filename );

	void		TouchPlayLooping( KeyValues *pAmbient );
	void		TouchPlayRandom( KeyValues *pPlayRandom );
	void		TouchWaveFiles( KeyValues *pSoundScape );
	void		TouchSoundFile( char const *wavefile );

	void		TouchSoundFiles();

	int							m_nRestoreFrame;

	CUtlVector< KeyValues * >	m_SoundscapeScripts;	// The whole script file in memory
	CUtlVector<KeyValues *>		m_soundscapes;			// Lookup by index of each root section
	struct Split_t
	{
		audioparams_t				m_params;				// current player audio params
		CUtlVector<loopingsound_t>	m_loopingSounds;		// list of currently playing sounds
		CUtlVector<randomsound_t>	m_randomSounds;			// list of random sound commands
		float						m_nextRandomTime;		// next time to play a random sound
		int							m_loopingSoundId;		// marks when the sound was issued
		int							m_forcedSoundscapeIndex;// >= 0 if this a "forced" soundscape? i.e. debug mode?
		float						m_forcedSoundscapeRadius;// distance to spatialized sounds
	};

	Split_t						m_PerUser[ MAX_SPLITSCREEN_PLAYERS ];

	Split_t						&GetPerUser( int nSlot )
	{
		return m_PerUser[ nSlot ];
	}

	const Split_t						&GetPerUser( int nSlot ) const
	{
		return m_PerUser[ nSlot ];
	}


	static ConVar *m_pDSPVolumeVar;
	static ConVar *m_pSoundMixerVar;

};


// singleton system
C_SoundscapeSystem g_SoundscapeSystem;
ConVar *C_SoundscapeSystem::m_pDSPVolumeVar = NULL;
ConVar *C_SoundscapeSystem::m_pSoundMixerVar = NULL;

IGameSystem *ClientSoundscapeSystem()
{
	return &g_SoundscapeSystem;
}

C_SoundscapeSystem *GetClientSoundscapeSystem()
{
	return &g_SoundscapeSystem;
}

void Soundscape_OnStopAllSounds()
{
	GetClientSoundscapeSystem()->OnStopAllSounds();
}


// player got a network update
void Soundscape_Update( audioparams_t &audio )
{
	GetClientSoundscapeSystem()->UpdateAudioParams( audio );
}

#define SOUNDSCAPE_MANIFEST_FILE				"scripts/soundscapes_manifest.txt"

void C_SoundscapeSystem::AddSoundScapeFile( const char *filename )
{
	KeyValues *script = new KeyValues( filename );
	if ( filesystem->LoadKeyValues( *script, IFileSystem::TYPE_SOUNDSCAPE, filename, "GAME" ) )
	{
		// parse out all of the top level sections and save their names
		KeyValues *pKeys = script;
		while ( pKeys )
		{
			// save pointers to all sections in the root
			// each one is a soundscape
			if ( pKeys->GetFirstSubKey() )
			{
				m_soundscapes.AddToTail( pKeys );
			}
			pKeys = pKeys->GetNextKey();
		}

		// Keep pointer around so we can delete it at exit
		m_SoundscapeScripts.AddToTail( script );
	}
	else
	{
		script->deleteThis();
	}
}

// parse the script file, setup index table
bool C_SoundscapeSystem::Init()
{
	for ( int hh = 0; hh < MAX_SPLITSCREEN_PLAYERS; ++hh )
	{
		ACTIVE_SPLITSCREEN_PLAYER_GUARD( hh );
		GetPerUser(hh).m_loopingSoundId = 0;
	}

	const char *mapname = MapName();
	const char *mapSoundscapeFilename = NULL;
	if ( mapname && *mapname )
	{
		mapSoundscapeFilename = VarArgs( "scripts/soundscapes_%s.txt", mapname );
	}

	KeyValues *manifest = new KeyValues( SOUNDSCAPE_MANIFEST_FILE );
	if ( filesystem->LoadKeyValues( *manifest, IFileSystem::TYPE_SOUNDSCAPE, SOUNDSCAPE_MANIFEST_FILE, "GAME" ) )
	{
		for ( KeyValues *sub = manifest->GetFirstSubKey(); sub != NULL; sub = sub->GetNextKey() )
		{
			if ( !Q_stricmp( sub->GetName(), "file" ) )
			{
				// Add
				AddSoundScapeFile( sub->GetString() );
				if ( mapSoundscapeFilename && FStrEq( sub->GetString(), mapSoundscapeFilename ) )
				{
					mapSoundscapeFilename = NULL; // we've already loaded the map's soundscape
				}
				continue;
			}

			Warning( "C_SoundscapeSystem::Init:  Manifest '%s' with bogus file type '%s', expecting 'file'\n", 
				SOUNDSCAPE_MANIFEST_FILE, sub->GetName() );
		}

		if ( mapSoundscapeFilename && filesystem->FileExists( mapSoundscapeFilename ) )
		{
			AddSoundScapeFile( mapSoundscapeFilename );
		}
	}
	else
	{
		Error( "Unable to load manifest file '%s'\n", SOUNDSCAPE_MANIFEST_FILE );
	}

	manifest->deleteThis();

	return true;
}


int C_SoundscapeSystem::FindSoundscapeByName( const char *pSoundscapeName )
{
	// UNDONE: Bad perf, linear search!
	for ( int i = m_soundscapes.Count()-1; i >= 0; --i )
	{
		if ( !Q_stricmp( m_soundscapes[i]->GetName(), pSoundscapeName ) )
			return i;
	}

	return -1;
}

KeyValues *C_SoundscapeSystem::SoundscapeByIndex( int index )
{
	if ( m_soundscapes.IsValidIndex(index) )
		return m_soundscapes[index];
	return NULL;
}

const char *C_SoundscapeSystem::SoundscapeNameByIndex( int index )
{
	if ( index < m_soundscapes.Count() )
	{
		return m_soundscapes[index]->GetName();
	}

	return NULL;
}

void C_SoundscapeSystem::Shutdown()
{
	for ( int hh = 0; hh < MAX_SPLITSCREEN_PLAYERS; ++hh )
	{
		ACTIVE_SPLITSCREEN_PLAYER_GUARD( hh );
		for ( int i = GetPerUser(hh).m_loopingSounds.Count() - 1; i >= 0; --i )
		{
			loopingsound_t &sound = GetPerUser(hh).m_loopingSounds[i];

			// sound is done, remove from list.
			StopLoopingSound( sound );
		}

		// These are only necessary so we can use shutdown/init calls
		// to flush soundscape data
		GetPerUser(hh).m_loopingSounds.RemoveAll();
		GetPerUser(hh).m_randomSounds.RemoveAll();
		GetPerUser(hh).m_params.entIndex = 0;
		GetPerUser(hh).m_params.soundscapeIndex = -1;
	}

	m_soundscapes.RemoveAll();

	while ( m_SoundscapeScripts.Count() > 0 )
	{
		KeyValues *kv = m_SoundscapeScripts[ 0 ];
		m_SoundscapeScripts.Remove( 0 );
		kv->deleteThis();
	}
}

// NOTE: This will not flush the server side so you cannot add or remove
// soundscapes from the list, only change their parameters!!!!
CON_COMMAND_F(cl_soundscape_flush, "Flushes the client side soundscapes", FCVAR_SERVER_CAN_EXECUTE|FCVAR_CHEAT)
{
	FOR_EACH_VALID_SPLITSCREEN_PLAYER( hh )
	{
		ACTIVE_SPLITSCREEN_PLAYER_GUARD( hh );
		// save the current soundscape
		audioparams_t tmp;
		GetClientSoundscapeSystem()->GetAudioParams( tmp );

		// kill the system
		GetClientSoundscapeSystem()->Shutdown();

		// restart the system
		GetClientSoundscapeSystem()->Init();

		// reload the soundscape params from the temp copy
		Soundscape_Update( tmp );
	}
}


static int SoundscapeCompletion( const char *partial, char commands[ COMMAND_COMPLETION_MAXITEMS ][ COMMAND_COMPLETION_ITEM_LENGTH ] )
{
	// Autocomplete can just look at the base system
	ACTIVE_SPLITSCREEN_PLAYER_GUARD( 0 );
	int current = 0;

	const char *cmdname = "playsoundscape";
	char *substring = NULL;
	int substringLen = 0;
	if ( Q_strstr( partial, cmdname ) && strlen(partial) > strlen(cmdname) + 1 )
	{
		substring = (char *)partial + strlen( cmdname ) + 1;
		substringLen = strlen(substring);
	}

	int i = 0;
	const char *pSoundscapeName = GetClientSoundscapeSystem()->SoundscapeNameByIndex( i );
	while ( pSoundscapeName && current < COMMAND_COMPLETION_MAXITEMS )
	{
		if ( !substring || !Q_strncasecmp( pSoundscapeName, substring, substringLen ) )
		{
			Q_snprintf( commands[ current ], sizeof( commands[ current ] ), "%s %s", cmdname, pSoundscapeName );
			current++;
		}
		i++;
		pSoundscapeName = GetClientSoundscapeSystem()->SoundscapeNameByIndex( i );
	}

	return current;
}

CON_COMMAND_F_COMPLETION( playsoundscape, "Forces a soundscape to play", FCVAR_CHEAT, SoundscapeCompletion )
{
	FOR_EACH_VALID_SPLITSCREEN_PLAYER( hh )
	{
		ACTIVE_SPLITSCREEN_PLAYER_GUARD( hh );
		if ( args.ArgC() < 2 )
		{
			GetClientSoundscapeSystem()->DevReportSoundscapeName( GetClientSoundscapeSystem()->GetCurrentSoundscape() );
			continue;
		}
		const char *pSoundscapeName = args[1];
		float radius = args.ArgC() > 2 ? atof( args[2] ) : DEFAULT_SOUND_RADIUS;
		GetClientSoundscapeSystem()->ForceSoundscape( pSoundscapeName, radius );
	}
}


CON_COMMAND_F( stopsoundscape, "Stops all soundscape processing and fades current looping sounds", FCVAR_CHEAT )
{
	FOR_EACH_VALID_SPLITSCREEN_PLAYER( hh )
	{
		ACTIVE_SPLITSCREEN_PLAYER_GUARD( hh );
		GetClientSoundscapeSystem()->StartNewSoundscape( NULL );
	}
}

void C_SoundscapeSystem::ForceSoundscape( const char *pSoundscapeName, float radius )
{
	int index = FindSoundscapeByName( pSoundscapeName );
	if ( index >= 0 )
	{
		int nSlot = GET_ACTIVE_SPLITSCREEN_SLOT();
		GetPerUser(nSlot).m_forcedSoundscapeIndex = index;
		GetPerUser(nSlot).m_forcedSoundscapeRadius = radius;
		StartNewSoundscape( SoundscapeByIndex(index) );
	}
	else
	{
		DevWarning("Can't find soundscape %s\n", pSoundscapeName );
	}
}

void C_SoundscapeSystem::DevReportSoundscapeName( int index )
{
	const char *pName = "none";
	if ( index >= 0 && index < m_soundscapes.Count() )
	{
		pName = m_soundscapes[index]->GetName();
	}

	if ( soundscape_message.GetBool() )
	{
		Msg( "Soundscape[%d]: %s\n", GET_ACTIVE_SPLITSCREEN_SLOT(), pName  );
	}
}


// This makes all currently playing loops fade toward their target volume
void C_SoundscapeSystem::UpdateLoopingSounds( float frametime )
{
	Split_t &slot = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT());
	int fadeCount = slot.m_loopingSounds.Count();
	while ( fadeCount > 0 )
	{
		fadeCount--;
		loopingsound_t &sound = slot.m_loopingSounds[fadeCount];

		bool bUpdateSound = sound.m_volume.IsFading();

		// for radius looping sounds, volume is manually set based on listener's distance
		if ( sound.radius > 0 )
		{
			C_BasePlayer *pPlayer = C_BasePlayer::GetLocalPlayer();
			if ( pPlayer )
			{
				C_BaseEntity *pEnt = pPlayer->GetSoundscapeListener();
				if ( pEnt )
				{
					float distance = pEnt->GetAbsOrigin().DistTo( sound.position );

					if ( distance > sound.radius * 100.0f )
					{
						// long way away, let sound fade to silence
						sound.m_volume.FadeToValue( 0.01f, 1.0f, FADE_VOLUME_LINEAR );	// HACK: Don't set sound to zero volume else it'll be removed and never started again!
					}
					else
					{
						float flTarget = 1.0f;
						// inside the radius, full volume, outside fade out
						if ( distance >= sound.radius )
						{
							flTarget = 1.0f / ( 1 + 0.5f * ( distance - sound.radius ) / sound.radius );
						}
						sound.m_volume.ForceToTargetValue( flTarget );
					}

					if ( soundscape_radius_debug.GetBool() )
					{
						DevMsg( 1, "Updated looping radius sound %d to vol=%f\n", fadeCount, sound.m_volume.m_flTarget );
					}

					bUpdateSound = true;
				}
			}
		}

		if ( bUpdateSound )
		{
			sound.m_volume.UpdateFade( frametime );
			if ( sound.m_volume.m_flTarget == 0 && sound.m_volume.m_flCurrent == 0 )
			{
				// sound is done, remove from list.
				StopLoopingSound( sound );
				slot.m_loopingSounds.FastRemove( fadeCount );
			}
			else
			{
				// tell the engine about the new volume
				UpdateLoopingSound( sound );
			}
		}
	}
}

void C_SoundscapeSystem::Update( float frametime ) 
{
	FOR_EACH_VALID_SPLITSCREEN_PLAYER( hh )
	{
		ACTIVE_SPLITSCREEN_PLAYER_GUARD( hh );
		if ( GetPerUser(hh).m_forcedSoundscapeIndex >= 0 )
		{
			// generate fake positional sources
			C_BasePlayer *pPlayer = C_BasePlayer::GetLocalPlayer();
			if ( pPlayer )
			{
				Vector origin, forward, right;
				pPlayer->EyePositionAndVectors( &origin, &forward, &right, NULL );

				// put the sound origins at the corners of a box around the player
				GetPerUser(hh).m_params.localSound.Set( 0, origin + GetPerUser(hh).m_forcedSoundscapeRadius * (forward-right) );
				GetPerUser(hh).m_params.localSound.Set( 1, origin + GetPerUser(hh).m_forcedSoundscapeRadius * (forward+right) );
				GetPerUser(hh).m_params.localSound.Set( 2, origin + GetPerUser(hh).m_forcedSoundscapeRadius * (-forward-right) );
				GetPerUser(hh).m_params.localSound.Set( 3, origin + GetPerUser(hh).m_forcedSoundscapeRadius * (-forward+right) );
				GetPerUser(hh).m_params.localBits = 0x0007;
			}
		}
		// fade out the old sounds over soundscape_fadetime seconds
		UpdateLoopingSounds( frametime );
		UpdateRandomSounds( gpGlobals->curtime );
	}
}


void C_SoundscapeSystem::UpdateAudioParams( audioparams_t &audio )
{
	Split_t &slot = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT());
	if ( slot.m_params.soundscapeIndex == audio.soundscapeIndex && slot.m_params.entIndex == audio.entIndex )
		return;

	slot.m_params = audio;
	slot.m_forcedSoundscapeIndex = -1;
	if ( audio.entIndex > 0 && audio.soundscapeIndex >= 0 && audio.soundscapeIndex < m_soundscapes.Count() )
	{
		DevReportSoundscapeName( audio.soundscapeIndex );
		StartNewSoundscape( m_soundscapes[audio.soundscapeIndex] );
	}
	else
	{
		// bad index (and the soundscape file actually existed...)
		if ( audio.entIndex > 0 &&
			audio.soundscapeIndex != -1 )
		{
			DevMsg(1, "Error: Bad soundscape!\n");
		}
	}
}



// Called when a soundscape is activated (leading edge of becoming the active soundscape)
void C_SoundscapeSystem::StartNewSoundscape( KeyValues *pSoundscape )
{
	int i;

	float flFadeRate = GetSoundscapeFadeRate();
	Split_t &slot = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT());

	// Reset the system
	// fade out the current loops
	// save off the count of old looping sounds
	int nOldLoopingSoundMax = slot.m_loopingSounds.Count()-1;
	for ( i = slot.m_loopingSounds.Count()-1; i >= 0; --i )
	{
		slot.m_loopingSounds[i].m_volume.FadeToValue( 0, flFadeRate, FADE_VOLUME_SINE );
		if ( !pSoundscape )
		{
			// if we're cancelling the soundscape, stop the sound immediately
			slot.m_loopingSounds[i].m_volume.ForceToTargetValue( 0 );
		}
	}
	// update ID
	slot.m_loopingSoundId++;

	// clear all random sounds
	slot.m_randomSounds.RemoveAll();
	slot.m_nextRandomTime = gpGlobals->curtime;

	if ( pSoundscape )
	{
		subsoundscapeparams_t params;
		params.allowDSP = true;
		params.wroteSoundMixer = false;
		params.wroteDSPVolume = false;

		params.masterVolume = 1.0;
		params.startingPosition = 0;
		params.recurseLevel = 0;
		params.positionOverride = -1;
		params.ambientPositionOverride = -1;
		params.flFadeRate = flFadeRate;
		params.bForceTextOriginAmbient = false;
		params.vForcedTextOriginAmbient.Init();

		StartSubSoundscape( pSoundscape, params );

		if ( !params.wroteDSPVolume )
		{
			m_pDSPVolumeVar->Revert();
		}
		if ( !params.wroteSoundMixer )
		{
			m_pSoundMixerVar->Revert();
		}
		// if we processed a fade rate, update the fade
		// This is a little bit of a hack but since we don't pre-parse soundscapes
		// into structs we can't know if there is a rate change on this soundscape
		if ( params.flFadeRate != flFadeRate )
		{
			for ( i = nOldLoopingSoundMax; i >= 0; --i )
			{
				// if we're still fading out at the old rate, fade at the new rate
				if ( slot.m_loopingSounds[i].m_volume.m_flTarget == 0.0f && slot.m_loopingSounds[i].m_volume.m_flRate == flFadeRate )
				{
					slot.m_loopingSounds[i].m_volume.m_flRate = params.flFadeRate;
				}
			}
		}
	}
}

void C_SoundscapeSystem::StartSubSoundscape( KeyValues *pSoundscape, subsoundscapeparams_t &params )
{
	// Parse/process all of the commands
	KeyValues *pKey = pSoundscape->GetFirstSubKey();
	while ( pKey )
	{
		if ( !Q_strcasecmp( pKey->GetName(), "dsp" ) )
		{
			if ( params.allowDSP )
			{
				ProcessDSP( pKey );
			}
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "dsp_player" ) )
		{
			if ( params.allowDSP )
			{
				ProcessDSPPlayer( pKey );
			}
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "fadetime" ) )
		{
			// don't allow setting these recursively since they are order dependent
			if ( params.recurseLevel < 1 )
			{
				ProcessSoundscapeFadetime( pKey, params );
			}
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "playlooping" ) )
		{
			ProcessPlayLooping( pKey, params );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "playrandom" ) )
		{
			ProcessPlayRandom( pKey, params );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "playsoundscape" ) )
		{
			ProcessPlaySoundscape( pKey, params );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "Soundmixer" ) )
		{
			if ( params.allowDSP )
			{
				ProcessSoundMixer( pKey, params );
			}
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "dsp_volume" ) )
		{
			if ( params.allowDSP )
			{
				ProcessDSPVolume( pKey, params );
			}
		}
		// add new commands here
		else
		{
			DevMsg( 1, "Soundscape %s:Unknown command %s\n", pSoundscape->GetName(), pKey->GetName() );
		}
		pKey = pKey->GetNextKey();
	}
}

// add a process for each new command here

// change DSP effect
void C_SoundscapeSystem::ProcessDSP( KeyValues *pDSP )
{
	int roomType = pDSP->GetInt();
	CLocalPlayerFilter filter;
	enginesound->SetRoomType( filter, roomType );
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : *pDSPPlayer - 
//-----------------------------------------------------------------------------
void C_SoundscapeSystem::ProcessDSPPlayer( KeyValues *pDSPPlayer )
{
	int dspType = pDSPPlayer->GetInt();
	CLocalPlayerFilter filter;
	enginesound->SetPlayerDSP( filter, dspType, false );
}


void C_SoundscapeSystem::ProcessSoundMixer( KeyValues *pSoundMixer, subsoundscapeparams_t &params )
{
	C_BasePlayer *pPlayer = C_BasePlayer::GetLocalPlayer();
	if ( !pPlayer || pPlayer->CanSetSoundMixer() )
	{
		m_pSoundMixerVar->SetValue( pSoundMixer->GetString() );
		params.wroteSoundMixer = true;
	}
}

void C_SoundscapeSystem::ProcessDSPVolume( KeyValues *pKey, subsoundscapeparams_t &params )
{
	m_pDSPVolumeVar->SetValue( pKey->GetFloat() );
	params.wroteDSPVolume = true;
}

void C_SoundscapeSystem::ProcessSoundscapeFadetime( KeyValues *pKey, subsoundscapeparams_t &params )
{
	float flFadeTime = pKey->GetFloat();
	if ( flFadeTime > 0.0f )
	{
		params.flFadeRate = 1.0f / flFadeTime;
	}
}

// start a new looping sound
void C_SoundscapeSystem::ProcessPlayLooping( KeyValues *pAmbient, const subsoundscapeparams_t &params )
{
	float volume = 0;
	soundlevel_t soundlevel = ATTN_TO_SNDLVL(ATTN_NORM);
	const char *pSoundName = NULL;
	int pitch = PITCH_NORM;
	int positionIndex = -1;
	bool randomPosition = false;
	bool suppress = false;
	bool useTextOrigin = false;
	Vector textOrigin;
	float radius = 0;

	Split_t &slot = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT());

	KeyValues *pKey = pAmbient->GetFirstSubKey();
	while ( pKey )
	{
		if ( !Q_strcasecmp( pKey->GetName(), "volume" ) )
		{
			volume = params.masterVolume * RandomInterval( ReadInterval( pKey->GetString() ) );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "pitch" ) )
		{
			pitch = RandomInterval( ReadInterval( pKey->GetString() ) );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "wave" ) )
		{
			pSoundName = pKey->GetString();
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "origin" ) )
		{
			textOrigin = getVectorFromString(pKey->GetString());
			useTextOrigin = true;
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "position" ) )
		{
			if ( !Q_strcasecmp( pKey->GetString(), "random" ) )
			{
				randomPosition = true;
			}
			else
			{
				positionIndex = params.startingPosition + pKey->GetInt();
			}
		//	positionIndex = params.startingPosition + pKey->GetInt();
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "attenuation" ) )
		{
			soundlevel = ATTN_TO_SNDLVL( RandomInterval( ReadInterval( pKey->GetString() ) ) );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "soundlevel" ) )
		{
			if ( !Q_strncasecmp( pKey->GetString(), "SNDLVL_", strlen( "SNDLVL_" ) ) )
			{
				soundlevel = TextToSoundLevel( pKey->GetString() );
			}
			else
			{
				soundlevel = (soundlevel_t)((int)RandomInterval( ReadInterval( pKey->GetString() ) ));
			}
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "suppress_on_restore" ) )
		{
			suppress = Q_atoi( pKey->GetString() ) != 0 ? true : false;
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "radius" ) )
		{
			radius = (float) atof( pKey->GetString() );
		}
		else
		{
			DevMsg( 1, "Ambient %s:Unknown command %s\n", pAmbient->GetName(), pKey->GetName() );
		}
		pKey = pKey->GetNextKey();
	}

	if ( positionIndex < 0 )
	{
		positionIndex = params.ambientPositionOverride;
	}
	else if ( params.positionOverride >= 0 )
	{
		positionIndex = params.positionOverride;
	}
	if ( params.bForceTextOriginAmbient && positionIndex < 0 )
	{
		useTextOrigin = true;
		textOrigin = params.vForcedTextOriginAmbient;
	}

	// Sound is mared as "suppress_on_restore" so don't restart it
	if ( IsBeingRestored() && suppress )
	{
		return;
	}

	if ( volume != 0 && pSoundName != NULL )
	{
		if ( randomPosition )
		{
			AddLoopingSound( pSoundName, false, volume, soundlevel, pitch, GenerateRandomSoundPosition(), radius, params.flFadeRate );
		}
		else if ( useTextOrigin )
		{
			AddLoopingSound( pSoundName, false, volume, soundlevel, pitch, textOrigin, radius, params.flFadeRate );
		}
		else if ( positionIndex < 0 )
		{
			AddLoopingAmbient( pSoundName, volume, pitch, radius, params.flFadeRate );
		}
		else
		{
			if ( positionIndex > 31 || !(slot.m_params.localBits & (1<<positionIndex) ) )
			{
				// suppress sounds if the position isn't available
				//DevMsg( 1, "Bad position %d\n", positionIndex );
				return;
			}
			AddLoopingSound( pSoundName, false, volume, soundlevel, pitch, slot.m_params.localSound[positionIndex], radius, params.flFadeRate );
		}
	}
}

void C_SoundscapeSystem::TouchSoundFile( char const *wavefile )
{
	filesystem->GetFileTime( VarArgs( "sound/%s", PSkipSoundChars( wavefile ) ), "GAME" );
}

// start a new looping sound
void C_SoundscapeSystem::TouchPlayLooping( KeyValues *pAmbient )
{
	KeyValues *pKey = pAmbient->GetFirstSubKey();
	while ( pKey )
	{
		if ( !Q_strcasecmp( pKey->GetName(), "wave" ) )
		{
			char const *pSoundName = pKey->GetString();

			// Touch the file
			TouchSoundFile( pSoundName );
		}

		pKey = pKey->GetNextKey();
	}
}


Vector C_SoundscapeSystem::GenerateRandomSoundPosition()
{
	float angle = random->RandomFloat( -180, 180 );
	float sinAngle, cosAngle;
	SinCos( angle, &sinAngle, &cosAngle );
	C_BasePlayer *pPlayer = C_BasePlayer::GetLocalPlayer();
	if ( pPlayer )
	{
		Vector origin, forward, right;
		pPlayer->EyePositionAndVectors( &origin, &forward, &right, NULL );
		return origin + DEFAULT_SOUND_RADIUS * (cosAngle * right + sinAngle * forward);
	}
	else
	{
		return CurrentViewOrigin() + DEFAULT_SOUND_RADIUS * (cosAngle * CurrentViewRight() + sinAngle * CurrentViewForward());
	}
}

void C_SoundscapeSystem::TouchSoundFiles()
{
	if ( !CommandLine()->FindParm( "-makereslists" ) )
		return;

	int c = m_soundscapes.Count();
	for ( int i = 0; i < c ; ++i )
	{
		TouchWaveFiles( m_soundscapes[ i ] );
	}
}

void C_SoundscapeSystem::TouchWaveFiles( KeyValues *pSoundScape )
{
	KeyValues *pKey = pSoundScape->GetFirstSubKey();
	while ( pKey )
	{
		if ( !Q_strcasecmp( pKey->GetName(), "playlooping" ) )
		{
			TouchPlayLooping( pKey );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "playrandom" ) )
		{
			TouchPlayRandom( pKey );
		}

		pKey = pKey->GetNextKey();
	}

}

// puts a recurring random sound event into the queue
void C_SoundscapeSystem::TouchPlayRandom( KeyValues *pPlayRandom )
{
	KeyValues *pKey = pPlayRandom->GetFirstSubKey();
	while ( pKey )
	{
		if ( !Q_strcasecmp( pKey->GetName(), "rndwave" ) )
		{
			KeyValues *pWaves = pKey->GetFirstSubKey();
			while ( pWaves )
			{
				TouchSoundFile( pWaves->GetString() );

				pWaves = pWaves->GetNextKey();
			}
		}

		pKey = pKey->GetNextKey();
	}
}

// puts a recurring random sound event into the queue
void C_SoundscapeSystem::ProcessPlayRandom( KeyValues *pPlayRandom, const subsoundscapeparams_t &params )
{
	randomsound_t sound;
	sound.Init();
	sound.masterVolume = params.masterVolume;
	int positionIndex = -1;
	bool suppress = false;
	bool randomPosition = false;
	bool useTextOrigin = false;
	Vector textOrigin;
	Split_t &slot = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT());

	KeyValues *pKey = pPlayRandom->GetFirstSubKey();
	while ( pKey )
	{
		if ( !Q_strcasecmp( pKey->GetName(), "volume" ) )
		{
			sound.volume = ReadInterval( pKey->GetString() );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "pitch" ) )
		{
			sound.pitch = ReadInterval( pKey->GetString() );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "attenuation" ) )
		{
			interval_t atten = ReadInterval( pKey->GetString() );
			sound.soundlevel.start = ATTN_TO_SNDLVL( atten.start );
			sound.soundlevel.range = ATTN_TO_SNDLVL( atten.start + atten.range ) - sound.soundlevel.start;
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "soundlevel" ) )
		{
			if ( !Q_strncasecmp( pKey->GetString(), "SNDLVL_", strlen( "SNDLVL_" ) ) )
			{
				sound.soundlevel.start = TextToSoundLevel( pKey->GetString() );
				sound.soundlevel.range = 0;
			}
			else
			{
				sound.soundlevel = ReadInterval( pKey->GetString() );
			}
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "time" ) )
		{
			sound.time = ReadInterval( pKey->GetString() );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "rndwave" ) )
		{
			KeyValues *pWaves = pKey->GetFirstSubKey();
			sound.pWaves = pWaves;
			sound.waveCount = 0;
			while ( pWaves )
			{
				sound.waveCount++;
				pWaves = pWaves->GetNextKey();
			}
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "position" ) )
		{
			if ( !Q_strcasecmp( pKey->GetString(), "random" ) )
			{
				randomPosition = true;
			}
			else
			{
				positionIndex = params.startingPosition + pKey->GetInt();
			}
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "origin" ) )
		{
			const char *originString = pKey->GetString();
			textOrigin = getVectorFromString(originString);	
			useTextOrigin = true;
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "suppress_on_restore" ) )
		{
			suppress = Q_atoi( pKey->GetString() ) != 0 ? true : false;
		}
		else
		{
			DevMsg( 1, "Random Sound %s:Unknown command %s\n", pPlayRandom->GetName(), pKey->GetName() );
		}

		pKey = pKey->GetNextKey();
	}

	if ( positionIndex < 0 )
	{
		positionIndex = params.ambientPositionOverride;
	}
	else if ( params.positionOverride >= 0 )
	{
		positionIndex = params.positionOverride;
		randomPosition = false; // override trumps random position
	}
	if ( params.bForceTextOriginAmbient && positionIndex < 0 )
	{
		useTextOrigin = true;
		textOrigin = params.vForcedTextOriginAmbient;
		randomPosition = false;
	}

	// Sound is mared as "suppress_on_restore" so don't restart it
	if ( IsBeingRestored() && suppress )
	{
		return;
	}

	if ( sound.waveCount != 0 )
	{
		if ( positionIndex < 0 && !randomPosition && !useTextOrigin )
		{
			sound.isAmbient = true;
			AddRandomSound( sound );
		}
		else
		{
			sound.isAmbient = false;
			if ( randomPosition )
			{
				sound.isRandom = true;
			}
			else if ( useTextOrigin )
			{
				sound.position = textOrigin;
			}
			else
			{
				if ( positionIndex > 31 || !(slot.m_params.localBits & (1<<positionIndex) ) )
				{
					// suppress sounds if the position isn't available
					//DevMsg( 1, "Bad position %d\n", positionIndex );
					return;
				}
				sound.position = slot.m_params.localSound[positionIndex];
			}
			AddRandomSound( sound );
		}
	}
}

void C_SoundscapeSystem::ProcessPlaySoundscape( KeyValues *pPlaySoundscape, subsoundscapeparams_t &paramsIn )
{
	subsoundscapeparams_t subParams = paramsIn;

	// sub-soundscapes NEVER set the DSP effects
	subParams.allowDSP = false;
	subParams.recurseLevel++;
	if ( subParams.recurseLevel > MAX_SOUNDSCAPE_RECURSION )
	{
		DevMsg( "Error!  Soundscape recursion overrun!\n" );
		return;
	}
	KeyValues *pKey = pPlaySoundscape->GetFirstSubKey();
	const char *pSoundscapeName = NULL;
	while ( pKey )
	{
		if ( !Q_strcasecmp( pKey->GetName(), "volume" ) )
		{
			subParams.masterVolume = paramsIn.masterVolume * RandomInterval( ReadInterval( pKey->GetString() ) );
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "position" ) )
		{
			subParams.startingPosition = paramsIn.startingPosition + pKey->GetInt();
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "positionoverride" ) )
		{
			if ( paramsIn.positionOverride < 0 )
			{
				subParams.positionOverride = paramsIn.startingPosition + pKey->GetInt();
				// positionoverride is only ever used to make a whole soundscape come from a point in space
				// So go ahead and default ambients there too.
				subParams.ambientPositionOverride = paramsIn.startingPosition + pKey->GetInt();
			}
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "ambientpositionoverride" ) )
		{
			if ( paramsIn.ambientPositionOverride < 0 )
			{
				subParams.ambientPositionOverride = paramsIn.startingPosition + pKey->GetInt();
			}
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "ambientoriginoverride" ) )
		{
			subParams.vForcedTextOriginAmbient = getVectorFromString(pKey->GetString());
			subParams.bForceTextOriginAmbient = true;
		}
		else if ( !Q_strcasecmp( pKey->GetName(), "name" ) )
		{
			pSoundscapeName = pKey->GetString();
		}
		else if ( !Q_strcasecmp(pKey->GetName(), "soundlevel") )
		{
			DevMsg(1,"soundlevel not supported on sub-soundscapes\n");
		}
		else
		{
			DevMsg( 1, "Playsoundscape %s:Unknown command %s\n", pSoundscapeName ? pSoundscapeName : pPlaySoundscape->GetName(), pKey->GetName() );
		}
		pKey = pKey->GetNextKey();
	}

	if ( pSoundscapeName )
	{
		KeyValues *pSoundscapeKeys = SoundscapeByIndex( FindSoundscapeByName( pSoundscapeName ) );
		if ( pSoundscapeKeys )
		{
			StartSubSoundscape( pSoundscapeKeys, subParams );
		}
		else
		{
			DevMsg( 1, "Trying to play unknown soundscape %s\n", pSoundscapeName );
		}
	}
}

// special kind of looping sound with no spatialization
int C_SoundscapeSystem::AddLoopingAmbient( const char *pSoundName, float volume, int pitch, float radius, float flFadeRate )
{
	return AddLoopingSound( pSoundName, true, volume, SNDLVL_NORM, pitch, vec3_origin, radius, flFadeRate );
}

// add a looping sound to the list
// NOTE: will reuse existing entry (fade from current volume) if possible
//		this prevents pops
int C_SoundscapeSystem::AddLoopingSound( const char *pSoundName, bool isAmbient, float volume, soundlevel_t soundlevel, int pitch, const Vector &position, float radius, float flFadeRate )
{
	Split_t &slot = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT());

	loopingsound_t *pSoundSlot = NULL;
	int soundSlot = slot.m_loopingSounds.Count() - 1;
	bool bForceSoundUpdate = false;
	while ( soundSlot >= 0 )
	{
		loopingsound_t &sound = slot.m_loopingSounds[soundSlot];

		// NOTE: Will always restart/crossfade positional sounds
		if ( sound.id != slot.m_loopingSoundId && 
			sound.pitch == pitch && 
			!Q_strcasecmp( pSoundName, sound.pWaveName ) )
		{
			// Ambient sounds can reuse the slots.
			if ( isAmbient == true && 
				sound.isAmbient == true )
			{
				// reuse this sound
				pSoundSlot = &sound;
				break;
			}
			// Positional sounds can reuse the slots if the positions are the same.
			else if ( isAmbient == sound.isAmbient )
			{
				if ( VectorsAreEqual( position, sound.position, 0.1f ) )
				{
					// reuse this sound
					pSoundSlot = &sound;
					break;
				}
			}
		}
		soundSlot--;
	}

	if ( soundSlot < 0 )
	{
		// can't find the sound in the list, make a new one
		soundSlot = slot.m_loopingSounds.AddToTail();
		if ( isAmbient )
		{
			// start at 0 and fade in
			enginesound->EmitAmbientSound( pSoundName, 0, pitch );
			slot.m_loopingSounds[soundSlot].m_volume.m_flCurrent = 0.0;
		}
		else
		{
			// non-ambients at 0 volume are culled, so start at 0.05
			CLocalPlayerFilter filter;

			EmitSound_t ep;
			ep.m_nChannel = CHAN_STATIC;
			ep.m_pSoundName =  pSoundName;
			ep.m_flVolume = 0.05;
			ep.m_SoundLevel = soundlevel;
			ep.m_nPitch = pitch;
			ep.m_pOrigin = &position;

			C_BaseEntity::EmitSound( filter, SOUND_FROM_WORLD, ep );
			slot.m_loopingSounds[soundSlot].m_volume.m_flCurrent = 0.05;
		}
		slot.m_loopingSounds[soundSlot].engineGuid = enginesound->GetGuidForLastSoundEmitted();
	}

	loopingsound_t &sound = slot.m_loopingSounds[soundSlot];
	// fill out the slot
	sound.pWaveName = pSoundName;
	sound.m_volume.FadeToValue( volume, flFadeRate, FADE_VOLUME_SINE );
	sound.pitch = pitch;
	sound.id = slot.m_loopingSoundId;
	sound.isAmbient = isAmbient;
	sound.position = position;
	sound.radius = radius;
	if ( radius > 0 )
	{
		sound.soundlevel = SNDLVL_NONE;	  // play without attenuation if sound has a radius (volume will be manually set based on distance of listener to the radius)
	}
	else
	{
		sound.soundlevel = soundlevel;
	}

	if (bForceSoundUpdate)
	{
		UpdateLoopingSound(sound);
	}

	return soundSlot;
}

// stop this loop forever
void C_SoundscapeSystem::StopLoopingSound( loopingsound_t &loopSound )
{
	enginesound->StopSoundByGuid( loopSound.engineGuid );
}

// update with new volume
void C_SoundscapeSystem::UpdateLoopingSound( loopingsound_t &loopSound )
{
	if ( enginesound->IsSoundStillPlaying(loopSound.engineGuid) )
	{
		enginesound->SetVolumeByGuid( loopSound.engineGuid, loopSound.m_volume.m_flCurrent );
		return;
	}

	if ( loopSound.isAmbient )
	{
		enginesound->EmitAmbientSound( loopSound.pWaveName, loopSound.m_volume.m_flCurrent, loopSound.pitch, SND_CHANGE_VOL );
	}
	else
	{
		CLocalPlayerFilter filter;

		EmitSound_t ep;
		ep.m_nChannel = CHAN_STATIC;
		ep.m_pSoundName =  loopSound.pWaveName;
		ep.m_flVolume = loopSound.m_volume.m_flCurrent;
		ep.m_SoundLevel = loopSound.soundlevel;
		ep.m_nFlags = SND_CHANGE_VOL;
		ep.m_nPitch = loopSound.pitch;
		ep.m_pOrigin = &loopSound.position;

		C_BaseEntity::EmitSound( filter, SOUND_FROM_WORLD, ep );
	}
	loopSound.engineGuid = enginesound->GetGuidForLastSoundEmitted();
}

// add a recurring random sound event
int C_SoundscapeSystem::AddRandomSound( const randomsound_t &sound )
{
	Split_t &slot = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT());
	int index = slot.m_randomSounds.AddToTail( sound );
	slot.m_randomSounds[index].nextPlayTime = gpGlobals->curtime + 0.5 * RandomInterval( sound.time );

	return index;
}

// play a random sound randomly from this parameterization table
void C_SoundscapeSystem::PlayRandomSound( randomsound_t &sound )
{
	Assert( sound.waveCount > 0 );

	int waveId = random->RandomInt( 0, sound.waveCount-1 );
	KeyValues *pWaves = sound.pWaves;
	while ( waveId > 0 && pWaves )
	{
		pWaves = pWaves->GetNextKey();
		waveId--;
	}
	if ( !pWaves )
		return;

	const char *pWaveName = pWaves->GetString();

	if ( !pWaveName )
		return;

	if ( sound.isAmbient )
	{
		enginesound->EmitAmbientSound( pWaveName, sound.masterVolume * RandomInterval( sound.volume ), (int)RandomInterval( sound.pitch ) );
	}
	else
	{
		CLocalPlayerFilter filter;

		EmitSound_t ep;
		ep.m_nChannel = CHAN_STATIC;
		ep.m_pSoundName =  pWaveName;
		ep.m_flVolume = sound.masterVolume * RandomInterval( sound.volume );
		ep.m_SoundLevel = (soundlevel_t)(int)RandomInterval( sound.soundlevel );
		ep.m_nPitch = (int)RandomInterval( sound.pitch );
		if ( sound.isRandom )
		{
			sound.position = GenerateRandomSoundPosition();
		}
		ep.m_pOrigin = &sound.position;

		C_BaseEntity::EmitSound( filter, SOUND_FROM_WORLD, ep );
	}
}

// walk the list of random sound commands and update
void C_SoundscapeSystem::UpdateRandomSounds( float gameTime )
{
	Split_t &slot = GetPerUser(GET_ACTIVE_SPLITSCREEN_SLOT());
	if ( gameTime < slot.m_nextRandomTime )
		return;

	slot.m_nextRandomTime = gameTime + 3600;	// add some big time to check again (an hour)

	for ( int i = slot.m_randomSounds.Count()-1; i >= 0; i-- )
	{
		// time to play?
		if ( gameTime >= slot.m_randomSounds[i].nextPlayTime )
		{
			// UNDONE: add this in to fix range?
			// float dt = m_randomSounds[i].nextPlayTime - gameTime;
			PlayRandomSound( slot.m_randomSounds[i] );

			// now schedule the next occurrance
			// UNDONE: add support for "play once" sounds? FastRemove() here.
			slot.m_randomSounds[i].nextPlayTime = gameTime + RandomInterval( slot.m_randomSounds[i].time );
		}

		// update next time to check the queue
		if ( slot.m_randomSounds[i].nextPlayTime < slot.m_nextRandomTime )
		{
			slot.m_nextRandomTime = slot.m_randomSounds[i].nextPlayTime;
		}
	}
}



CON_COMMAND(cl_soundscape_printdebuginfo, "print soundscapes")
{
	FOR_EACH_VALID_SPLITSCREEN_PLAYER( hh )
	{
		ACTIVE_SPLITSCREEN_PLAYER_GUARD( hh );
		GetClientSoundscapeSystem()->PrintDebugInfo();
	}
}


CON_COMMAND(cl_ss_origin, "print origin in script format")
{
	Vector org = MainViewOrigin( GET_ACTIVE_SPLITSCREEN_SLOT() );
	Warning("\"origin\"\t\"%.1f, %.1f, %.1f\"\n", org.x, org.y, org.z );
}