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diff --git a/game/shared/voice_gamemgr.h b/game/shared/voice_gamemgr.h
new file mode 100644
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+++ b/game/shared/voice_gamemgr.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef VOICE_GAMEMGR_H
+#define VOICE_GAMEMGR_H
+#pragma once
+
+
+#include "voice_common.h"
+
+
+class CGameRules;
+class CBasePlayer;
+
+abstract_class IVoiceGameMgrHelper
+{
+public:
+	virtual				~IVoiceGameMgrHelper() {}
+
+	// Called each frame to determine which players are allowed to hear each other.	This overrides
+	// whatever squelch settings players have.
+	virtual bool		CanPlayerHearPlayer(CBasePlayer *pListener, CBasePlayer *pTalker, bool &bProximity ) = 0;
+};
+
+
+// CVoiceGameMgr manages which clients can hear which other clients.
+class CVoiceGameMgr
+{
+public:
+						CVoiceGameMgr();
+	virtual				~CVoiceGameMgr();
+	
+	bool				Init(
+		IVoiceGameMgrHelper *m_pHelper,
+		int maxClients
+		);
+
+	void				SetHelper(IVoiceGameMgrHelper *pHelper);
+
+	// Updates which players can hear which other players.
+	// If gameplay mode is DM, then only players within the PVS can hear each other.
+	// If gameplay mode is teamplay, then only players on the same team can hear each other.
+	// Player masks are always applied.
+	void				Update(double frametime);
+
+	// Called when a new client connects (unsquelches its entity for everyone).
+	void				ClientConnected(struct edict_t *pEdict);
+
+	// Called on ClientCommand. Checks for the squelch and unsquelch commands.
+	// Returns true if it handled the command.
+	bool				ClientCommand(CBasePlayer *pPlayer, const CCommand &args );
+
+	bool				CheckProximity( int iDistance );
+	void				SetProximityDistance( int iDistance );
+
+	bool				IsPlayerIgnoringPlayer( int iTalker, int iListener );
+
+private:
+
+	// Force it to update the client masks.
+	void				UpdateMasks();
+
+
+private:
+	IVoiceGameMgrHelper	*m_pHelper;
+	int					m_nMaxPlayers;
+	double				m_UpdateInterval;						// How long since the last update.
+	int					m_iProximityDistance;
+};
+
+
+// Use this to access CVoiceGameMgr.
+CVoiceGameMgr* GetVoiceGameMgr();
+
+
+
+#endif // VOICE_GAMEMGR_H