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Large Pack of OldSkool DOS MOD Trackers
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goattracker_2.68.zip
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resid-fp
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voice.h
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C/C++ Source or Header
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2009-01-03
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// ---------------------------------------------------------------------------
// This file is part of reSID, a MOS6581 SID emulator engine.
// Copyright (C) 2004 Dag Lem <resid@nimrod.no>
//
// This program 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 2 of the License, or
// (at your option) any later version.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
// ---------------------------------------------------------------------------
#ifndef __VOICE_FP_H__
#define __VOICE_FP_H__
#include "siddefs-fp.h"
#include "wave.h"
#include "envelope.h"
class VoiceFP
{
public:
VoiceFP();
void set_chip_model(chip_model model);
void set_sync_source(VoiceFP*);
void reset();
void writeCONTROL_REG(reg8);
// Amplitude modulated waveform output.
// Range [-2048*255, 2047*255].
RESID_INLINE float output();
void set_nonlinearity(float nl);
protected:
void calculate_dac_tables();
WaveformGeneratorFP wave;
EnvelopeGeneratorFP envelope;
// Multiplying D/A DC offset.
float voice_DC, wave_zero, nonlinearity;
float env_dac[256];
float voice_dac[4096];
friend class SIDFP;
};
// ----------------------------------------------------------------------------
// Amplitude modulated waveform output.
// Ideal range [-2048*255, 2047*255].
// ----------------------------------------------------------------------------
RESID_INLINE
float VoiceFP::output()
{
unsigned int w = wave.output();
unsigned int e = envelope.output();
float _w = voice_dac[w];
float _e = env_dac[e];
return _w * _e + voice_DC;
}
#endif // not __VOICE_FP_H__