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neo/sound/SoundVoice.h

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+/*
+===========================================================================
+
+Doom 3 BFG Edition GPL Source Code
+Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company. 
+
+This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").  
+
+Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Doom 3 BFG Edition Source Code 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.
+
+In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.
+
+If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
+
+===========================================================================
+*/
+#ifndef __SOUNDVOICE_H__
+#define __SOUNDVOICE_H__
+
+/*
+================================================
+idSoundVoice_Base
+================================================
+*/
+
+class idSoundVoice_Base {
+public:
+				idSoundVoice_Base();
+
+	static void InitSurround( int outputChannels, int channelMask );
+
+	void		CalculateSurround( int srcChannels, float pLevelMatrix[ MAX_CHANNELS_PER_VOICE * MAX_CHANNELS_PER_VOICE ], float scale );
+
+	void		SetPosition( const idVec3 & p ) { position = p; }
+	void		SetGain( float g ) { gain = g; }
+	void		SetCenterChannel( float c ) { centerChannel = c; }
+	void		SetPitch( float p ) { pitch = p; }
+	void		SetInnerRadius( float r ) { innerRadius = r; }
+	void		SetChannelMask( uint32 mask ) { channelMask = mask; }
+
+	const idSoundSample * GetCurrentSample();
+
+	// Controls the low pass filter, where 0.0f = no filtering, 1.0f = full filter
+	void		SetOcclusion( float f ) { occlusion = f; }
+
+	float		GetGain() { return gain; }
+	float		GetPitch() { return pitch; }
+
+protected:
+	idVec3		position;			// Position of the sound relative to listener
+	float		gain;				// Volume (0-1)
+	float		centerChannel;		// Value (0-1) which indicates how much of this voice goes to the center channel
+	float		pitch;				// Pitch multiplier
+	float		innerRadius;		// Anything closer than this is omni
+	float		occlusion;			// How much of this sound is occluded (0-1)
+	uint32		channelMask;		// Set to override the default channel mask
+
+	// These are some setting used to do SSF_DISTANCE_BASED_STERO blending
+	float		innerSampleRangeSqr;
+	float		outerSampleRangeSqr;
+
+	idList< idSoundSample *, TAG_AUDIO> samples;
+
+	// These are constants which are initialized with InitSurround
+	//-------------------------------------------------------------
+
+	static idVec2 speakerPositions[idWaveFile::CHANNEL_INDEX_MAX];
+
+	// This is to figure out which speakers are "next to" this one
+	static int speakerLeft[idWaveFile::CHANNEL_INDEX_MAX];
+	static int speakerRight[idWaveFile::CHANNEL_INDEX_MAX];
+
+	// Number of channels in the output hardware
+	static int dstChannels;
+
+	// Mask indicating which speakers exist in the hardware configuration
+	static int dstMask;
+
+	// dstMap maps a destination channel to a speaker
+	// invMap maps a speaker to a destination channel
+	static int dstCenter;
+	static int dstLFE;
+	static int dstMap[MAX_CHANNELS_PER_VOICE];
+	static int invMap[idWaveFile::CHANNEL_INDEX_MAX];
+
+	// specifies what volume to specify for each channel when a speaker is omni
+	static float omniLevel;
+};
+
+#endif