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Large Pack of OldSkool DOS MOD Trackers
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goattracker_2.73.zip
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resid-fp
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sidfp.h
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C/C++ Source or Header
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2014-07-23
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102 lines
// ---------------------------------------------------------------------------
// 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 __SIDFP_H__
#define __SIDFP_H__
#include "siddefsfp.h"
#include "voicefp.h"
#include "filterfp.h"
#include "extfiltfp.h"
#include "potfp.h"
class SIDFP
{
public:
SIDFP();
~SIDFP();
static float kinked_dac(const int x, const float nonlinearity, const int bits);
void set_chip_model(chip_model model);
FilterFP& get_filter() { return filter; }
void enable_filter(bool enable);
bool set_sampling_parameters(double clock_freq, sampling_method method,
double sample_freq, double pass_freq = 20000);
void set_voice_nonlinearity(float nl);
void clock();
int clock(cycle_count& delta_t, short* buf, int n, int interleave = 1);
int clock_fast(cycle_count& delta_t, short* buf, int n, int interleave = 1);
void reset();
// Read/write registers.
reg8 read(reg8 offset);
void write(reg8 offset, reg8 value);
void mute(reg8 channel, bool enable);
// 16-bit input (EXT IN).
void input(int sample);
// 16-bit output (AUDIO OUT).
float output();
private:
static double I0(double x);
inline int clock_interpolate(cycle_count& delta_t, short* buf, int n,
int interleave);
inline int clock_resample_interpolate(cycle_count& delta_t, short* buf,
int n, int interleave);
inline void age_bus_value(cycle_count);
VoiceFP voice[3];
FilterFP filter;
ExternalFilterFP extfilt;
PotentiometerFP potx;
PotentiometerFP poty;
reg8 bus_value;
cycle_count bus_value_ttl;
// External audio input.
float ext_in;
// Sampling variables.
sampling_method sampling;
float cycles_per_sample;
float sample_offset;
int sample_index;
int fir_N;
int fir_RES;
/* for linear interpolation mode */
float sample_prev;
// Ring buffer with overflow for contiguous storage of RINGSIZE samples.
float* sample;
// FIR_RES filter tables (FIR_N*FIR_RES).
float* fir;
/* analog parts are run at half the rate of digital ones. */
float lastsample[3];
unsigned char filtercyclegate;
};
#endif // not __SIDFP_H__