1 files changed, 136 insertions, 0 deletions
diff --git a/plugins/sid/sidplay-libs/resid/sid.h b/plugins/sid/sidplay-libs/resid/sid.h
new file mode 100644
index 00000000..33754547
--- /dev/null
+++ b/plugins/sid/sidplay-libs/resid/sid.h
@@ -0,0 +1,136 @@
+//  ---------------------------------------------------------------------------
+//  This file is part of reSID, a MOS6581 SID emulator engine.
+//  Copyright (C) 2002  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"
+
+enum
+{   // VC <= 6 patch
+    RESID_FIR_ORDER = 123,
+    RESID_FIR_N     = RESID_FIR_ORDER/2 + 1,
+    RESID_FIR_RES   = 512,
+    RESID_FIR_SHIFT = 16
+};
+
+RESID_NAMESPACE_START
+
+class SID
+{
+public:
+  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);
+  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);
+  void mute(reg8 channel, bool enable);
+
+  // 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 exponential_counter[3];
+    reg8 envelope_counter[3];
+    bool hold_zero[3];
+  };
+    
+  State read_state();
+  void write_state(const State& state);
+
+  // 16-bit output.
+  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(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;
+
+  // Sampling variables.
+  cycle_count sample_offset;
+  short sample_prev;
+  unsigned int sample_index;
+  short sample[16384];
+
+  // Sampling constants.
+  // VC <= 6 patch
+  static const int FIR_ORDER;
+  static const int FIR_N;
+  static const int FIR_RES;
+  static const int FIR_SHIFT;
+  sampling_method sampling;
+  cycle_count cycles_per_sample;
+  cycle_count fstep_per_cycle;
+  cycle_count sample_delay;
+  int fir_N;
+  int foffset_max;
+  // VC <= 6 patch
+  short fir[RESID_FIR_N*RESID_FIR_RES + 1];
+  short fir_diff[RESID_FIR_N*RESID_FIR_RES + 1];
+};
+
+RESID_NAMESPACE_STOP
+
+#endif // not __SID_H__