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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 __SID_H__
- #define __SID_H__
-
- #include "siddefs.h"
- #include "voice.h"
- #include "filter.h"
- #include "extfilt.h"
- #include "pot.h"
-
- class SID
- {
- public:
- SID();
- ~SID();
-
- void set_chip_model(chip_model model);
- void enable_filter(bool enable);
- void enable_external_filter(bool enable);
- bool set_sampling_parameters(double clock_freq, sampling_method method,
- double sample_freq, double pass_freq = -1,
- double filter_scale = 0.97);
- void adjust_sampling_frequency(double sample_freq);
-
- void fc_default(const fc_point*& points, int& count);
- PointPlotter<sound_sample> fc_plotter();
-
- void clock();
- void clock(cycle_count delta_t);
- int clock(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);
-
- // Read/write state.
- class State
- {
- public:
- State();
-
- char sid_register[0x20];
-
- reg8 bus_value;
- cycle_count bus_value_ttl;
-
- reg24 accumulator[3];
- reg24 shift_register[3];
- reg16 rate_counter[3];
- reg16 rate_counter_period[3];
- reg16 exponential_counter[3];
- reg16 exponential_counter_period[3];
- reg8 envelope_counter[3];
- EnvelopeGenerator::State envelope_state[3];
- bool hold_zero[3];
- };
-
- State read_state();
- void write_state(const State& state);
-
- // 16-bit input (EXT IN).
- void input(int sample);
-
- // 16-bit output (AUDIO OUT).
- int output();
- // n-bit output.
- int output(int bits);
-
- protected:
- static double I0(double x);
- RESID_INLINE int clock_fast(cycle_count& delta_t, short* buf, int n,
- int interleave);
- RESID_INLINE int clock_interpolate(cycle_count& delta_t, short* buf, int n,
- int interleave);
- RESID_INLINE int clock_resample_interpolate(cycle_count& delta_t, short* buf,
- int n, int interleave);
- RESID_INLINE int clock_resample_fast(cycle_count& delta_t, short* buf,
- int n, int interleave);
-
- Voice voice[3];
- Filter filter;
- ExternalFilter extfilt;
- Potentiometer potx;
- Potentiometer poty;
-
- reg8 bus_value;
- cycle_count bus_value_ttl;
-
- double clock_frequency;
-
- // External audio input.
- int ext_in;
-
- // Sampling variables.
- sampling_method sampling;
- cycle_count cycles_per_sample;
- cycle_count sample_offset;
- int sample_index;
- short sample_prev;
- int fir_N;
- int fir_RES;
-
- // Ring buffer with overflow for contiguous storage of RINGSIZE samples.
- short* sample;
-
- // FIR_RES filter tables (FIR_N*FIR_RES).
- short* fir;
- };
-
- #endif // not __SID_H__
-