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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 __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__
-