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/* |
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* SID.cpp - 6581 emulation |
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* |
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* Frodo (C) 1994-1997,2002-2005 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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/* |
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* Incompatibilities: |
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* ------------------ |
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* |
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* - Lots of empirically determined constants in the filter calculations |
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*/ |
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|
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#include "sysdeps.h" |
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#include <math.h> |
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|
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#include "SID.h" |
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#include "Prefs.h" |
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|
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#ifdef __BEOS__ |
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#include <media/SoundPlayer.h> |
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#endif |
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|
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#ifdef AMIGA |
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#include <exec/types.h> |
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#include <utility/hooks.h> |
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#include <devices/ahi.h> |
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#define USE_FIXPOINT_MATHS |
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#define FIXPOINT_PREC 16 // number of fractional bits used in fixpoint representation |
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#define PRECOMPUTE_RESONANCE |
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#define ldSINTAB 9 // size of sinus table (0 to 90 degrees) |
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#endif |
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|
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#ifdef SUN |
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extern "C" { |
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#include <sys/audioio.h> |
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} |
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#endif |
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|
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#ifdef __hpux |
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extern "C" { |
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#include <sys/audio.h> |
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} |
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#endif |
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|
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#ifdef __mac__ |
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#include <Sound.h> |
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#define M_PI 3.14159265358979323846 |
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#endif |
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|
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#ifdef WIN32 |
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class DigitalPlayer; |
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#endif |
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|
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#ifdef __riscos__ |
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#include "ROLib.h" |
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# ifndef M_PI |
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# define M_PI 3.14159265358979323846 |
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# endif |
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#define USE_FIXPOINT_MATHS |
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#define FIXPOINT_PREC 16 // number of fractional bits used in fixpoint representation |
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#define PRECOMPUTE_RESONANCE |
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#define ldSINTAB 9 // size of sinus table (0 to 90 degrees) |
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#endif |
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|
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|
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#ifdef USE_FIXPOINT_MATHS |
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#include "FixPoint.h" |
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#endif |
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|
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|
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/* |
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* Resonance frequency polynomials |
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*/ |
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|
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#define CALC_RESONANCE_LP(f) (227.755\ |
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- 1.7635 * f\ |
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- 0.0176385 * f * f\ |
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+ 0.00333484 * f * f * f\ |
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- 9.05683E-6 * f * f * f * f) |
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|
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#define CALC_RESONANCE_HP(f) (366.374\ |
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- 14.0052 * f\ |
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+ 0.603212 * f * f\ |
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- 0.000880196 * f * f * f) |
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|
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|
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/* |
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* Random number generator for noise waveform |
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*/ |
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|
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static uint8 sid_random(void); |
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static uint8 sid_random(void) |
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{ |
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static uint32 seed = 1; |
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seed = seed * 1103515245 + 12345; |
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return seed >> 16; |
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} |
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|
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|
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/* |
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* Constructor |
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*/ |
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|
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MOS6581::MOS6581(C64 *c64) : the_c64(c64) |
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{ |
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the_renderer = NULL; |
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for (int i=0; i<32; i++) |
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regs[i] = 0; |
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|
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// Open the renderer |
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open_close_renderer(SIDTYPE_NONE, ThePrefs.SIDType); |
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} |
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|
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|
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/* |
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* Destructor |
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*/ |
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|
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MOS6581::~MOS6581() |
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{ |
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// Close the renderer |
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open_close_renderer(ThePrefs.SIDType, SIDTYPE_NONE); |
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} |
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|
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|
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/* |
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* Reset the SID |
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*/ |
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|
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void MOS6581::Reset(void) |
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{ |
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for (int i=0; i<32; i++) |
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regs[i] = 0; |
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last_sid_byte = 0; |
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|
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// Reset the renderer |
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if (the_renderer != NULL) |
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the_renderer->Reset(); |
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} |
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|
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|
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/* |
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* Preferences may have changed |
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*/ |
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|
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void MOS6581::NewPrefs(Prefs *prefs) |
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{ |
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open_close_renderer(ThePrefs.SIDType, prefs->SIDType); |
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if (the_renderer != NULL) |
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the_renderer->NewPrefs(prefs); |
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} |
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|
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|
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/* |
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* Pause sound output |
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*/ |
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|
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void MOS6581::PauseSound(void) |
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{ |
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if (the_renderer != NULL) |
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the_renderer->Pause(); |
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} |
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|
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|
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/* |
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* Resume sound output |
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*/ |
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|
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void MOS6581::ResumeSound(void) |
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{ |
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if (the_renderer != NULL) |
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the_renderer->Resume(); |
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} |
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|
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|
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/* |
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* Get SID state |
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*/ |
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|
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void MOS6581::GetState(MOS6581State *ss) |
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{ |
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ss->freq_lo_1 = regs[0]; |
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ss->freq_hi_1 = regs[1]; |
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ss->pw_lo_1 = regs[2]; |
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ss->pw_hi_1 = regs[3]; |
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ss->ctrl_1 = regs[4]; |
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ss->AD_1 = regs[5]; |
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ss->SR_1 = regs[6]; |
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|
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ss->freq_lo_2 = regs[7]; |
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ss->freq_hi_2 = regs[8]; |
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ss->pw_lo_2 = regs[9]; |
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ss->pw_hi_2 = regs[10]; |
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ss->ctrl_2 = regs[11]; |
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ss->AD_2 = regs[12]; |
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ss->SR_2 = regs[13]; |
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|
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ss->freq_lo_3 = regs[14]; |
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ss->freq_hi_3 = regs[15]; |
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ss->pw_lo_3 = regs[16]; |
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ss->pw_hi_3 = regs[17]; |
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ss->ctrl_3 = regs[18]; |
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ss->AD_3 = regs[19]; |
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ss->SR_3 = regs[20]; |
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|
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ss->fc_lo = regs[21]; |
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ss->fc_hi = regs[22]; |
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ss->res_filt = regs[23]; |
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ss->mode_vol = regs[24]; |
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|
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ss->pot_x = 0xff; |
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ss->pot_y = 0xff; |
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ss->osc_3 = 0; |
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ss->env_3 = 0; |
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} |
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|
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|
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/* |
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* Restore SID state |
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*/ |
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|
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void MOS6581::SetState(MOS6581State *ss) |
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{ |
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regs[0] = ss->freq_lo_1; |
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regs[1] = ss->freq_hi_1; |
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regs[2] = ss->pw_lo_1; |
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regs[3] = ss->pw_hi_1; |
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regs[4] = ss->ctrl_1; |
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regs[5] = ss->AD_1; |
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regs[6] = ss->SR_1; |
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|
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regs[7] = ss->freq_lo_2; |
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regs[8] = ss->freq_hi_2; |
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regs[9] = ss->pw_lo_2; |
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regs[10] = ss->pw_hi_2; |
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regs[11] = ss->ctrl_2; |
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regs[12] = ss->AD_2; |
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regs[13] = ss->SR_2; |
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|
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regs[14] = ss->freq_lo_3; |
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regs[15] = ss->freq_hi_3; |
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regs[16] = ss->pw_lo_3; |
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regs[17] = ss->pw_hi_3; |
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regs[18] = ss->ctrl_3; |
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regs[19] = ss->AD_3; |
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regs[20] = ss->SR_3; |
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|
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regs[21] = ss->fc_lo; |
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regs[22] = ss->fc_hi; |
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regs[23] = ss->res_filt; |
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regs[24] = ss->mode_vol; |
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|
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// Stuff the new register values into the renderer |
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if (the_renderer != NULL) |
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for (int i=0; i<25; i++) |
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the_renderer->WriteRegister(i, regs[i]); |
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} |
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|
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|
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/** |
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** Renderer for digital SID emulation (SIDTYPE_DIGITAL) |
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**/ |
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|
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#if defined(AMIGA) || defined(__riscos__) |
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const uint32 SAMPLE_FREQ = 22050; // Sample output frequency in Hz |
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#else |
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const uint32 SAMPLE_FREQ = 44100; // Sample output frequency in Hz |
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#endif |
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const uint32 SID_FREQ = 985248; // SID frequency in Hz |
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const uint32 CALC_FREQ = 50; // Frequency at which calc_buffer is called in Hz (should be 50Hz) |
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const uint32 SID_CYCLES = SID_FREQ/SAMPLE_FREQ; // # of SID clocks per sample frame |
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const int SAMPLE_BUF_SIZE = 0x138*2;// Size of buffer for sampled voice (double buffered) |
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|
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// SID waveforms (some of them :-) |
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enum { |
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WAVE_NONE, |
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WAVE_TRI, |
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WAVE_SAW, |
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WAVE_TRISAW, |
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WAVE_RECT, |
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WAVE_TRIRECT, |
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WAVE_SAWRECT, |
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WAVE_TRISAWRECT, |
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WAVE_NOISE |
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}; |
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|
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// EG states |
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enum { |
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EG_IDLE, |
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EG_ATTACK, |
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EG_DECAY, |
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EG_RELEASE |
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}; |
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|
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// Filter types |
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enum { |
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FILT_NONE, |
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FILT_LP, |
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FILT_BP, |
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FILT_LPBP, |
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FILT_HP, |
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FILT_NOTCH, |
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FILT_HPBP, |
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FILT_ALL |
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}; |
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|
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// Structure for one voice |
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struct DRVoice { |
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int wave; // Selected waveform |
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int eg_state; // Current state of EG |
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DRVoice *mod_by; // Voice that modulates this one |
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DRVoice *mod_to; // Voice that is modulated by this one |
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|
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uint32 count; // Counter for waveform generator, 8.16 fixed |
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uint32 add; // Added to counter in every frame |
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|
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uint16 freq; // SID frequency value |
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uint16 pw; // SID pulse-width value |
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|
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uint32 a_add; // EG parameters |
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uint32 d_sub; |
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uint32 s_level; |
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uint32 r_sub; |
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uint32 eg_level; // Current EG level, 8.16 fixed |
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|
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uint32 noise; // Last noise generator output value |
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|
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bool gate; // EG gate bit |
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bool ring; // Ring modulation bit |
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bool test; // Test bit |
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bool filter; // Flag: Voice filtered |
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|
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// The following bit is set for the modulating |
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// voice, not for the modulated one (as the SID bits) |
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bool sync; // Sync modulation bit |
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bool mute; // Voice muted (voice 3 only) |
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}; |
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|
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// Renderer class |
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class DigitalRenderer : public SIDRenderer { |
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public: |
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#if defined(__BEOS__) || defined(__riscos__) |
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DigitalRenderer(C64 *c64); |
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#else |
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DigitalRenderer(); |
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#endif |
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virtual ~DigitalRenderer(); |
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|
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virtual void Reset(void); |
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virtual void EmulateLine(void); |
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virtual void WriteRegister(uint16 adr, uint8 byte); |
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virtual void NewPrefs(Prefs *prefs); |
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virtual void Pause(void); |
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virtual void Resume(void); |
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|
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private: |
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void init_sound(void); |
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void calc_filter(void); |
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#ifdef __riscos__ |
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void calc_buffer(uint8 *buf, long count); |
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#else |
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void calc_buffer(int16 *buf, long count); |
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#endif |
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|
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bool ready; // Flag: Renderer has initialized and is ready |
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uint8 volume; // Master volume |
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|
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static uint16 TriTable[0x1000*2]; // Tables for certain waveforms |
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static const uint16 TriSawTable[0x100]; |
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static const uint16 TriRectTable[0x100]; |
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static const uint16 SawRectTable[0x100]; |
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static const uint16 TriSawRectTable[0x100]; |
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static const uint32 EGTable[16]; // Increment/decrement values for all A/D/R settings |
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static const uint8 EGDRShift[256]; // For exponential approximation of D/R |
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static const int16 SampleTab[16]; // Table for sampled voice |
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|
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DRVoice voice[3]; // Data for 3 voices |
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|
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uint8 f_type; // Filter type |
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uint8 f_freq; // SID filter frequency (upper 8 bits) |
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uint8 f_res; // Filter resonance (0..15) |
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#ifdef USE_FIXPOINT_MATHS |
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FixPoint f_ampl; |
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FixPoint d1, d2, g1, g2; |
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int32 xn1, xn2, yn1, yn2; // can become very large |
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FixPoint sidquot; |
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#ifdef PRECOMPUTE_RESONANCE |
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FixPoint resonanceLP[256]; |
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FixPoint resonanceHP[256]; |
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#endif |
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#else |
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float f_ampl; // IIR filter input attenuation |
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float d1, d2, g1, g2; // IIR filter coefficients |
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float xn1, xn2, yn1, yn2; // IIR filter previous input/output signal |
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#ifdef PRECOMPUTE_RESONANCE |
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float resonanceLP[256]; // shortcut for calc_filter |
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float resonanceHP[256]; |
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#endif |
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#endif |
415 |
|
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uint8 sample_buf[SAMPLE_BUF_SIZE]; // Buffer for sampled voice |
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int sample_in_ptr; // Index in sample_buf for writing |
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|
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#ifdef __BEOS__ |
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static void buffer_proc(void *cookie, void *buffer, size_t size, const media_raw_audio_format &format); |
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C64 *the_c64; // Pointer to C64 object |
422 |
BSoundPlayer *the_player; // Pointer to sound player |
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bool player_stopped; // Flag: player stopped |
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#endif |
425 |
|
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#ifdef AMIGA |
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static void sub_invoc(void); // Sound sub-process |
428 |
void sub_func(void); |
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struct Process *sound_process; |
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int quit_sig, pause_sig, |
431 |
resume_sig, ahi_sig; // Sub-process signals |
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struct Task *main_task; // Main task |
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int main_sig; // Main task signals |
434 |
static ULONG sound_func(void); // AHI callback |
435 |
struct MsgPort *ahi_port; // Port and IORequest for AHI |
436 |
struct AHIRequest *ahi_io; |
437 |
struct AHIAudioCtrl *ahi_ctrl; // AHI control structure |
438 |
struct AHISampleInfo sample[2]; // SampleInfos for double buffering |
439 |
struct Hook sf_hook; // Hook for callback function |
440 |
int play_buf; // Number of buffer currently playing |
441 |
#endif |
442 |
|
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#ifdef __linux__ |
444 |
int devfd, sndbufsize, buffer_rate; |
445 |
int16 *sound_buffer; |
446 |
#endif |
447 |
|
448 |
#ifdef SUN |
449 |
int fd; |
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audio_info status; |
451 |
uint_t sent_samples,delta_samples; |
452 |
int16 *sound_calc_buf; |
453 |
#endif |
454 |
|
455 |
#ifdef __hpux |
456 |
int fd; |
457 |
audio_status status; |
458 |
int16 *sound_calc_buf; |
459 |
int linecnt; |
460 |
#endif |
461 |
|
462 |
#ifdef __mac__ |
463 |
SndChannelPtr chan1; |
464 |
SndDoubleBufferHeader myDblHeader; |
465 |
SndDoubleBufferPtr sampleBuffer1, sampleBuffer2; |
466 |
SCStatus myStatus; |
467 |
short sndbufsize; |
468 |
OSErr err; |
469 |
|
470 |
static void doubleBackProc(SndChannelPtr chan, SndDoubleBufferPtr doubleBuffer); |
471 |
#endif |
472 |
|
473 |
#ifdef WIN32 |
474 |
public: |
475 |
void VBlank(void); |
476 |
|
477 |
private: |
478 |
void StartPlayer(void); |
479 |
void StopPlayer(void); |
480 |
|
481 |
BOOL direct_sound; |
482 |
DigitalPlayer *ThePlayer; |
483 |
SWORD *sound_buffer; |
484 |
int to_output; |
485 |
int sb_pos; |
486 |
int divisor; |
487 |
int *lead; |
488 |
int lead_pos; |
489 |
#endif |
490 |
|
491 |
#ifdef __riscos__ |
492 |
int linecnt, sndbufsize; |
493 |
uint8 *sound_buffer; |
494 |
C64 *the_c64; |
495 |
#endif |
496 |
}; |
497 |
|
498 |
// Static data members |
499 |
uint16 DigitalRenderer::TriTable[0x1000*2]; |
500 |
|
501 |
#ifndef EMUL_MOS8580 |
502 |
// Sampled from a 6581R4 |
503 |
const uint16 DigitalRenderer::TriSawTable[0x100] = { |
504 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
505 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
506 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
507 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
508 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
509 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
510 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
511 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0808, |
512 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
513 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
514 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
515 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
516 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
517 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
518 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
519 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x1010, 0x3C3C, |
520 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
521 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
522 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
523 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
524 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
525 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
526 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
527 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0808, |
528 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
529 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
530 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
531 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
532 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
533 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
534 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
535 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x1010, 0x3C3C |
536 |
}; |
537 |
|
538 |
const uint16 DigitalRenderer::TriRectTable[0x100] = { |
539 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
540 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
541 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
542 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
543 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
544 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
545 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
546 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
547 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
548 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
549 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
550 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x8080, |
551 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
552 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x8080, |
553 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x8080, 0xC0C0, |
554 |
0x0000, 0x8080, 0x8080, 0xE0E0, 0x8080, 0xE0E0, 0xF0F0, 0xFCFC, |
555 |
0xFFFF, 0xFCFC, 0xFAFA, 0xF0F0, 0xF6F6, 0xE0E0, 0xE0E0, 0x8080, |
556 |
0xEEEE, 0xE0E0, 0xE0E0, 0x8080, 0xC0C0, 0x0000, 0x0000, 0x0000, |
557 |
0xDEDE, 0xC0C0, 0xC0C0, 0x0000, 0x8080, 0x0000, 0x0000, 0x0000, |
558 |
0x8080, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
559 |
0xBEBE, 0x8080, 0x8080, 0x0000, 0x8080, 0x0000, 0x0000, 0x0000, |
560 |
0x8080, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
561 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
562 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
563 |
0x7E7E, 0x4040, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
564 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
565 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
566 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
567 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
568 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
569 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
570 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 |
571 |
}; |
572 |
|
573 |
const uint16 DigitalRenderer::SawRectTable[0x100] = { |
574 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
575 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
576 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
577 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
578 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
579 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
580 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
581 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
582 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
583 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
584 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
585 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
586 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
587 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
588 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
589 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x7878, |
590 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
591 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
592 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
593 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
594 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
595 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
596 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
597 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
598 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
599 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
600 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
601 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
602 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
603 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
604 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
605 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x7878 |
606 |
}; |
607 |
|
608 |
const uint16 DigitalRenderer::TriSawRectTable[0x100] = { |
609 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
610 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
611 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
612 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
613 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
614 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
615 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
616 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
617 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
618 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
619 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
620 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
621 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
622 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
623 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
624 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
625 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
626 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
627 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
628 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
629 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
630 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
631 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
632 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
633 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
634 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
635 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
636 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
637 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
638 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
639 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
640 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 |
641 |
}; |
642 |
#else |
643 |
// Sampled from an 8580R5 |
644 |
const uint16 DigitalRenderer::TriSawTable[0x100] = { |
645 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
646 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
647 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
648 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
649 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
650 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
651 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
652 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0808, |
653 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
654 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
655 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
656 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
657 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
658 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
659 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
660 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x1818, 0x3C3C, |
661 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
662 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
663 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
664 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
665 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
666 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
667 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
668 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x1C1C, |
669 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
670 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
671 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
672 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
673 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
674 |
0x0000, 0x0000, 0x0000, 0x0000, 0x8080, 0x0000, 0x8080, 0x8080, |
675 |
0xC0C0, 0xC0C0, 0xC0C0, 0xC0C0, 0xC0C0, 0xC0C0, 0xC0C0, 0xE0E0, |
676 |
0xF0F0, 0xF0F0, 0xF0F0, 0xF0F0, 0xF8F8, 0xF8F8, 0xFCFC, 0xFEFE |
677 |
}; |
678 |
|
679 |
const uint16 DigitalRenderer::TriRectTable[0x100] = { |
680 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
681 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
682 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
683 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
684 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
685 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
686 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
687 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
688 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
689 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
690 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
691 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
692 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
693 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
694 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
695 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
696 |
0xFFFF, 0xFCFC, 0xF8F8, 0xF0F0, 0xF4F4, 0xF0F0, 0xF0F0, 0xE0E0, |
697 |
0xECEC, 0xE0E0, 0xE0E0, 0xC0C0, 0xE0E0, 0xC0C0, 0xC0C0, 0xC0C0, |
698 |
0xDCDC, 0xC0C0, 0xC0C0, 0xC0C0, 0xC0C0, 0xC0C0, 0x8080, 0x8080, |
699 |
0xC0C0, 0x8080, 0x8080, 0x8080, 0x8080, 0x8080, 0x0000, 0x0000, |
700 |
0xBEBE, 0xA0A0, 0x8080, 0x8080, 0x8080, 0x8080, 0x8080, 0x0000, |
701 |
0x8080, 0x8080, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
702 |
0x8080, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
703 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
704 |
0x7E7E, 0x7070, 0x6060, 0x0000, 0x4040, 0x0000, 0x0000, 0x0000, |
705 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
706 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
707 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
708 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
709 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
710 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
711 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 |
712 |
}; |
713 |
|
714 |
const uint16 DigitalRenderer::SawRectTable[0x100] = { |
715 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
716 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
717 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
718 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
719 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
720 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
721 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
722 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
723 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
724 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
725 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
726 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
727 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
728 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
729 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
730 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
731 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
732 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
733 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
734 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
735 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
736 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x8080, |
737 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x8080, 0x8080, |
738 |
0x0000, 0x8080, 0x8080, 0x8080, 0x8080, 0x8080, 0xB0B0, 0xBEBE, |
739 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x8080, |
740 |
0x0000, 0x0000, 0x0000, 0x8080, 0x8080, 0x8080, 0x8080, 0xC0C0, |
741 |
0x0000, 0x8080, 0x8080, 0x8080, 0x8080, 0x8080, 0x8080, 0xC0C0, |
742 |
0x8080, 0x8080, 0xC0C0, 0xC0C0, 0xC0C0, 0xC0C0, 0xC0C0, 0xDCDC, |
743 |
0x8080, 0x8080, 0x8080, 0xC0C0, 0xC0C0, 0xC0C0, 0xC0C0, 0xC0C0, |
744 |
0xC0C0, 0xC0C0, 0xC0C0, 0xE0E0, 0xE0E0, 0xE0E0, 0xE0E0, 0xECEC, |
745 |
0xC0C0, 0xE0E0, 0xE0E0, 0xE0E0, 0xE0E0, 0xF0F0, 0xF0F0, 0xF4F4, |
746 |
0xF0F0, 0xF0F0, 0xF8F8, 0xF8F8, 0xF8F8, 0xFCFC, 0xFEFE, 0xFFFF |
747 |
}; |
748 |
|
749 |
const uint16 DigitalRenderer::TriSawRectTable[0x100] = { |
750 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
751 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
752 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
753 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
754 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
755 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
756 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
757 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
758 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
759 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
760 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
761 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
762 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
763 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
764 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
765 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
766 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
767 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
768 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
769 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
770 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
771 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
772 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
773 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
774 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
775 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
776 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
777 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
778 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, |
779 |
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x8080, 0x8080, |
780 |
0x8080, 0x8080, 0x8080, 0x8080, 0x8080, 0x8080, 0xC0C0, 0xC0C0, |
781 |
0xC0C0, 0xC0C0, 0xE0E0, 0xE0E0, 0xE0E0, 0xF0F0, 0xF8F8, 0xFCFC |
782 |
}; |
783 |
#endif |
784 |
|
785 |
const uint32 DigitalRenderer::EGTable[16] = { |
786 |
(SID_CYCLES << 16) / 9, (SID_CYCLES << 16) / 32, |
787 |
(SID_CYCLES << 16) / 63, (SID_CYCLES << 16) / 95, |
788 |
(SID_CYCLES << 16) / 149, (SID_CYCLES << 16) / 220, |
789 |
(SID_CYCLES << 16) / 267, (SID_CYCLES << 16) / 313, |
790 |
(SID_CYCLES << 16) / 392, (SID_CYCLES << 16) / 977, |
791 |
(SID_CYCLES << 16) / 1954, (SID_CYCLES << 16) / 3126, |
792 |
(SID_CYCLES << 16) / 3906, (SID_CYCLES << 16) / 11720, |
793 |
(SID_CYCLES << 16) / 19531, (SID_CYCLES << 16) / 31251 |
794 |
}; |
795 |
|
796 |
const uint8 DigitalRenderer::EGDRShift[256] = { |
797 |
5,5,5,5,5,5,5,5,4,4,4,4,4,4,4,4, |
798 |
3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2, |
799 |
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, |
800 |
2,2,2,2,2,2,2,2,1,1,1,1,1,1,1,1, |
801 |
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
802 |
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
803 |
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
804 |
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
805 |
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
806 |
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
807 |
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
808 |
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
809 |
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
810 |
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
811 |
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
812 |
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
813 |
}; |
814 |
|
815 |
const int16 DigitalRenderer::SampleTab[16] = { |
816 |
0x8000, 0x9111, 0xa222, 0xb333, 0xc444, 0xd555, 0xe666, 0xf777, |
817 |
0x0888, 0x1999, 0x2aaa, 0x3bbb, 0x4ccc, 0x5ddd, 0x6eee, 0x7fff, |
818 |
}; |
819 |
|
820 |
|
821 |
/* |
822 |
* Constructor |
823 |
*/ |
824 |
|
825 |
#if defined(__BEOS__) || defined(__riscos__) |
826 |
DigitalRenderer::DigitalRenderer(C64 *c64) : the_c64(c64) |
827 |
#else |
828 |
DigitalRenderer::DigitalRenderer() |
829 |
#endif |
830 |
{ |
831 |
// Link voices together |
832 |
voice[0].mod_by = &voice[2]; |
833 |
voice[1].mod_by = &voice[0]; |
834 |
voice[2].mod_by = &voice[1]; |
835 |
voice[0].mod_to = &voice[1]; |
836 |
voice[1].mod_to = &voice[2]; |
837 |
voice[2].mod_to = &voice[0]; |
838 |
|
839 |
// Calculate triangle table |
840 |
for (int i=0; i<0x1000; i++) { |
841 |
TriTable[i] = (i << 4) | (i >> 8); |
842 |
TriTable[0x1fff-i] = (i << 4) | (i >> 8); |
843 |
} |
844 |
|
845 |
#ifdef PRECOMPUTE_RESONANCE |
846 |
#ifdef USE_FIXPOINT_MATHS |
847 |
// slow floating point doesn't matter much on startup! |
848 |
for (int i=0; i<256; i++) { |
849 |
resonanceLP[i] = FixNo(CALC_RESONANCE_LP(i)); |
850 |
resonanceHP[i] = FixNo(CALC_RESONANCE_HP(i)); |
851 |
} |
852 |
// Pre-compute the quotient. No problem since int-part is small enough |
853 |
sidquot = (int32)((((double)SID_FREQ)*65536) / SAMPLE_FREQ); |
854 |
// compute lookup table for sin and cos |
855 |
InitFixSinTab(); |
856 |
#else |
857 |
for (int i=0; i<256; i++) { |
858 |
resonanceLP[i] = CALC_RESONANCE_LP(i); |
859 |
resonanceHP[i] = CALC_RESONANCE_HP(i); |
860 |
} |
861 |
#endif |
862 |
#endif |
863 |
|
864 |
Reset(); |
865 |
|
866 |
// System specific initialization |
867 |
init_sound(); |
868 |
} |
869 |
|
870 |
|
871 |
/* |
872 |
* Reset emulation |
873 |
*/ |
874 |
|
875 |
void DigitalRenderer::Reset(void) |
876 |
{ |
877 |
volume = 0; |
878 |
|
879 |
for (int v=0; v<3; v++) { |
880 |
voice[v].wave = WAVE_NONE; |
881 |
voice[v].eg_state = EG_IDLE; |
882 |
voice[v].count = voice[v].add = 0; |
883 |
voice[v].freq = voice[v].pw = 0; |
884 |
voice[v].eg_level = voice[v].s_level = 0; |
885 |
voice[v].a_add = voice[v].d_sub = voice[v].r_sub = EGTable[0]; |
886 |
voice[v].gate = voice[v].ring = voice[v].test = false; |
887 |
voice[v].filter = voice[v].sync = voice[v].mute = false; |
888 |
} |
889 |
|
890 |
f_type = FILT_NONE; |
891 |
f_freq = f_res = 0; |
892 |
#ifdef USE_FIXPOINT_MATHS |
893 |
f_ampl = FixNo(1); |
894 |
d1 = d2 = g1 = g2 = 0; |
895 |
xn1 = xn2 = yn1 = yn2 = 0; |
896 |
#else |
897 |
f_ampl = 1.0; |
898 |
d1 = d2 = g1 = g2 = 0.0; |
899 |
xn1 = xn2 = yn1 = yn2 = 0.0; |
900 |
#endif |
901 |
|
902 |
sample_in_ptr = 0; |
903 |
memset(sample_buf, 0, SAMPLE_BUF_SIZE); |
904 |
} |
905 |
|
906 |
|
907 |
/* |
908 |
* Write to register |
909 |
*/ |
910 |
|
911 |
void DigitalRenderer::WriteRegister(uint16 adr, uint8 byte) |
912 |
{ |
913 |
if (!ready) |
914 |
return; |
915 |
|
916 |
int v = adr/7; // Voice number |
917 |
|
918 |
switch (adr) { |
919 |
case 0: |
920 |
case 7: |
921 |
case 14: |
922 |
voice[v].freq = (voice[v].freq & 0xff00) | byte; |
923 |
#ifdef USE_FIXPOINT_MATHS |
924 |
voice[v].add = sidquot.imul((int)voice[v].freq); |
925 |
#else |
926 |
voice[v].add = (uint32)((float)voice[v].freq * SID_FREQ / SAMPLE_FREQ); |
927 |
#endif |
928 |
break; |
929 |
|
930 |
case 1: |
931 |
case 8: |
932 |
case 15: |
933 |
voice[v].freq = (voice[v].freq & 0xff) | (byte << 8); |
934 |
#ifdef USE_FIXPOINT_MATHS |
935 |
voice[v].add = sidquot.imul((int)voice[v].freq); |
936 |
#else |
937 |
voice[v].add = (uint32)((float)voice[v].freq * SID_FREQ / SAMPLE_FREQ); |
938 |
#endif |
939 |
break; |
940 |
|
941 |
case 2: |
942 |
case 9: |
943 |
case 16: |
944 |
voice[v].pw = (voice[v].pw & 0x0f00) | byte; |
945 |
break; |
946 |
|
947 |
case 3: |
948 |
case 10: |
949 |
case 17: |
950 |
voice[v].pw = (voice[v].pw & 0xff) | ((byte & 0xf) << 8); |
951 |
break; |
952 |
|
953 |
case 4: |
954 |
case 11: |
955 |
case 18: |
956 |
voice[v].wave = (byte >> 4) & 0xf; |
957 |
if ((byte & 1) != voice[v].gate) |
958 |
if (byte & 1) // Gate turned on |
959 |
voice[v].eg_state = EG_ATTACK; |
960 |
else // Gate turned off |
961 |
if (voice[v].eg_state != EG_IDLE) |
962 |
voice[v].eg_state = EG_RELEASE; |
963 |
voice[v].gate = byte & 1; |
964 |
voice[v].mod_by->sync = byte & 2; |
965 |
voice[v].ring = byte & 4; |
966 |
if ((voice[v].test = byte & 8) != 0) |
967 |
voice[v].count = 0; |
968 |
break; |
969 |
|
970 |
case 5: |
971 |
case 12: |
972 |
case 19: |
973 |
voice[v].a_add = EGTable[byte >> 4]; |
974 |
voice[v].d_sub = EGTable[byte & 0xf]; |
975 |
break; |
976 |
|
977 |
case 6: |
978 |
case 13: |
979 |
case 20: |
980 |
voice[v].s_level = (byte >> 4) * 0x111111; |
981 |
voice[v].r_sub = EGTable[byte & 0xf]; |
982 |
break; |
983 |
|
984 |
case 22: |
985 |
if (byte != f_freq) { |
986 |
f_freq = byte; |
987 |
if (ThePrefs.SIDFilters) |
988 |
calc_filter(); |
989 |
} |
990 |
break; |
991 |
|
992 |
case 23: |
993 |
voice[0].filter = byte & 1; |
994 |
voice[1].filter = byte & 2; |
995 |
voice[2].filter = byte & 4; |
996 |
if ((byte >> 4) != f_res) { |
997 |
f_res = byte >> 4; |
998 |
if (ThePrefs.SIDFilters) |
999 |
calc_filter(); |
1000 |
} |
1001 |
break; |
1002 |
|
1003 |
case 24: |
1004 |
volume = byte & 0xf; |
1005 |
voice[2].mute = byte & 0x80; |
1006 |
if (((byte >> 4) & 7) != f_type) { |
1007 |
f_type = (byte >> 4) & 7; |
1008 |
#ifdef USE_FIXPOINT_MATHS |
1009 |
xn1 = xn2 = yn1 = yn2 = 0; |
1010 |
#else |
1011 |
xn1 = xn2 = yn1 = yn2 = 0.0; |
1012 |
#endif |
1013 |
if (ThePrefs.SIDFilters) |
1014 |
calc_filter(); |
1015 |
} |
1016 |
break; |
1017 |
} |
1018 |
} |
1019 |
|
1020 |
|
1021 |
/* |
1022 |
* Preferences may have changed |
1023 |
*/ |
1024 |
|
1025 |
void DigitalRenderer::NewPrefs(Prefs *prefs) |
1026 |
{ |
1027 |
calc_filter(); |
1028 |
} |
1029 |
|
1030 |
|
1031 |
/* |
1032 |
* Calculate IIR filter coefficients |
1033 |
*/ |
1034 |
|
1035 |
void DigitalRenderer::calc_filter(void) |
1036 |
{ |
1037 |
#ifdef USE_FIXPOINT_MATHS |
1038 |
FixPoint fr, arg; |
1039 |
|
1040 |
if (f_type == FILT_ALL) |
1041 |
{ |
1042 |
d1 = 0; d2 = 0; g1 = 0; g2 = 0; f_ampl = FixNo(1); return; |
1043 |
} |
1044 |
else if (f_type == FILT_NONE) |
1045 |
{ |
1046 |
d1 = 0; d2 = 0; g1 = 0; g2 = 0; f_ampl = 0; return; |
1047 |
} |
1048 |
#else |
1049 |
float fr, arg; |
1050 |
|
1051 |
// Check for some trivial cases |
1052 |
if (f_type == FILT_ALL) { |
1053 |
d1 = 0.0; d2 = 0.0; |
1054 |
g1 = 0.0; g2 = 0.0; |
1055 |
f_ampl = 1.0; |
1056 |
return; |
1057 |
} else if (f_type == FILT_NONE) { |
1058 |
d1 = 0.0; d2 = 0.0; |
1059 |
g1 = 0.0; g2 = 0.0; |
1060 |
f_ampl = 0.0; |
1061 |
return; |
1062 |
} |
1063 |
#endif |
1064 |
|
1065 |
// Calculate resonance frequency |
1066 |
if (f_type == FILT_LP || f_type == FILT_LPBP) |
1067 |
#ifdef PRECOMPUTE_RESONANCE |
1068 |
fr = resonanceLP[f_freq]; |
1069 |
#else |
1070 |
fr = CALC_RESONANCE_LP(f_freq); |
1071 |
#endif |
1072 |
else |
1073 |
#ifdef PRECOMPUTE_RESONANCE |
1074 |
fr = resonanceHP[f_freq]; |
1075 |
#else |
1076 |
fr = CALC_RESONANCE_HP(f_freq); |
1077 |
#endif |
1078 |
|
1079 |
#ifdef USE_FIXPOINT_MATHS |
1080 |
// explanations see below. |
1081 |
arg = fr / (SAMPLE_FREQ >> 1); |
1082 |
if (arg > FixNo(0.99)) {arg = FixNo(0.99);} |
1083 |
if (arg < FixNo(0.01)) {arg = FixNo(0.01);} |
1084 |
|
1085 |
g2 = FixNo(0.55) + FixNo(1.2) * arg * (arg - 1) + FixNo(0.0133333333) * f_res; |
1086 |
g1 = FixNo(-2) * g2.sqrt() * fixcos(arg); |
1087 |
|
1088 |
if (f_type == FILT_LPBP || f_type == FILT_HPBP) {g2 += FixNo(0.1);} |
1089 |
|
1090 |
if (g1.abs() >= g2 + 1) |
1091 |
{ |
1092 |
if (g1 > 0) {g1 = g2 + FixNo(0.99);} |
1093 |
else {g1 = -(g2 + FixNo(0.99));} |
1094 |
} |
1095 |
|
1096 |
switch (f_type) |
1097 |
{ |
1098 |
case FILT_LPBP: |
1099 |
case FILT_LP: |
1100 |
d1 = FixNo(2); d2 = FixNo(1); f_ampl = FixNo(0.25) * (1 + g1 + g2); break; |
1101 |
case FILT_HPBP: |
1102 |
case FILT_HP: |
1103 |
d1 = FixNo(-2); d2 = FixNo(1); f_ampl = FixNo(0.25) * (1 - g1 + g2); break; |
1104 |
case FILT_BP: |
1105 |
d1 = 0; d2 = FixNo(-1); |
1106 |
f_ampl = FixNo(0.25) * (1 + g1 + g2) * (1 + fixcos(arg)) / fixsin(arg); |
1107 |
break; |
1108 |
case FILT_NOTCH: |
1109 |
d1 = FixNo(-2) * fixcos(arg); d2 = FixNo(1); |
1110 |
f_ampl = FixNo(0.25) * (1 + g1 + g2) * (1 + fixcos(arg)) / fixsin(arg); |
1111 |
break; |
1112 |
default: break; |
1113 |
} |
1114 |
|
1115 |
#else |
1116 |
|
1117 |
// Limit to <1/2 sample frequency, avoid div by 0 in case FILT_BP below |
1118 |
arg = fr / (float)(SAMPLE_FREQ >> 1); |
1119 |
if (arg > 0.99) |
1120 |
arg = 0.99; |
1121 |
if (arg < 0.01) |
1122 |
arg = 0.01; |
1123 |
|
1124 |
// Calculate poles (resonance frequency and resonance) |
1125 |
g2 = 0.55 + 1.2 * arg * arg - 1.2 * arg + (float)f_res * 0.0133333333; |
1126 |
g1 = -2.0 * sqrt(g2) * cos(M_PI * arg); |
1127 |
|
1128 |
// Increase resonance if LP/HP combined with BP |
1129 |
if (f_type == FILT_LPBP || f_type == FILT_HPBP) |
1130 |
g2 += 0.1; |
1131 |
|
1132 |
// Stabilize filter |
1133 |
if (fabs(g1) >= g2 + 1.0) |
1134 |
if (g1 > 0.0) |
1135 |
g1 = g2 + 0.99; |
1136 |
else |
1137 |
g1 = -(g2 + 0.99); |
1138 |
|
1139 |
// Calculate roots (filter characteristic) and input attenuation |
1140 |
switch (f_type) { |
1141 |
|
1142 |
case FILT_LPBP: |
1143 |
case FILT_LP: |
1144 |
d1 = 2.0; d2 = 1.0; |
1145 |
f_ampl = 0.25 * (1.0 + g1 + g2); |
1146 |
break; |
1147 |
|
1148 |
case FILT_HPBP: |
1149 |
case FILT_HP: |
1150 |
d1 = -2.0; d2 = 1.0; |
1151 |
f_ampl = 0.25 * (1.0 - g1 + g2); |
1152 |
break; |
1153 |
|
1154 |
case FILT_BP: |
1155 |
d1 = 0.0; d2 = -1.0; |
1156 |
f_ampl = 0.25 * (1.0 + g1 + g2) * (1 + cos(M_PI * arg)) / sin(M_PI * arg); |
1157 |
break; |
1158 |
|
1159 |
case FILT_NOTCH: |
1160 |
d1 = -2.0 * cos(M_PI * arg); d2 = 1.0; |
1161 |
f_ampl = 0.25 * (1.0 + g1 + g2) * (1 + cos(M_PI * arg)) / (sin(M_PI * arg)); |
1162 |
break; |
1163 |
|
1164 |
default: |
1165 |
break; |
1166 |
} |
1167 |
#endif |
1168 |
} |
1169 |
|
1170 |
|
1171 |
/* |
1172 |
* Fill one audio buffer with calculated SID sound |
1173 |
*/ |
1174 |
|
1175 |
#ifdef __riscos__ |
1176 |
void DigitalRenderer::calc_buffer(uint8 *buf, long count) |
1177 |
#else |
1178 |
void DigitalRenderer::calc_buffer(int16 *buf, long count) |
1179 |
#endif |
1180 |
{ |
1181 |
// Get filter coefficients, so the emulator won't change |
1182 |
// them in the middle of our calculations |
1183 |
#ifdef USE_FIXPOINT_MATHS |
1184 |
FixPoint cf_ampl = f_ampl; |
1185 |
FixPoint cd1 = d1, cd2 = d2, cg1 = g1, cg2 = g2; |
1186 |
#else |
1187 |
float cf_ampl = f_ampl; |
1188 |
float cd1 = d1, cd2 = d2, cg1 = g1, cg2 = g2; |
1189 |
#endif |
1190 |
|
1191 |
#ifdef __riscos__ |
1192 |
uint8 *LinToLog, *LogScale; |
1193 |
#endif |
1194 |
|
1195 |
// Index in sample_buf for reading, 16.16 fixed |
1196 |
uint32 sample_count = (sample_in_ptr + SAMPLE_BUF_SIZE/2) << 16; |
1197 |
|
1198 |
#ifdef __riscos__ // on RISC OS we have 8 bit logarithmic sound |
1199 |
DigitalRenderer_GetTables(&LinToLog, &LogScale); // get translation tables |
1200 |
#else |
1201 |
count >>= 1; // 16 bit mono output, count is in bytes |
1202 |
#endif |
1203 |
while (count--) { |
1204 |
// Get current master volume from sample buffer, |
1205 |
// calculate sampled voice |
1206 |
uint8 master_volume = sample_buf[(sample_count >> 16) % SAMPLE_BUF_SIZE]; |
1207 |
sample_count += ((0x138 * 50) << 16) / SAMPLE_FREQ; |
1208 |
int32 sum_output = SampleTab[master_volume] << 8; |
1209 |
int32 sum_output_filter = 0; |
1210 |
|
1211 |
// Loop for all three voices |
1212 |
for (int j=0; j<3; j++) { |
1213 |
DRVoice *v = &voice[j]; |
1214 |
|
1215 |
// Envelope generators |
1216 |
uint16 envelope; |
1217 |
|
1218 |
switch (v->eg_state) { |
1219 |
case EG_ATTACK: |
1220 |
v->eg_level += v->a_add; |
1221 |
if (v->eg_level > 0xffffff) { |
1222 |
v->eg_level = 0xffffff; |
1223 |
v->eg_state = EG_DECAY; |
1224 |
} |
1225 |
break; |
1226 |
case EG_DECAY: |
1227 |
if (v->eg_level <= v->s_level || v->eg_level > 0xffffff) |
1228 |
v->eg_level = v->s_level; |
1229 |
else { |
1230 |
v->eg_level -= v->d_sub >> EGDRShift[v->eg_level >> 16]; |
1231 |
if (v->eg_level <= v->s_level || v->eg_level > 0xffffff) |
1232 |
v->eg_level = v->s_level; |
1233 |
} |
1234 |
break; |
1235 |
case EG_RELEASE: |
1236 |
v->eg_level -= v->r_sub >> EGDRShift[v->eg_level >> 16]; |
1237 |
if (v->eg_level > 0xffffff) { |
1238 |
v->eg_level = 0; |
1239 |
v->eg_state = EG_IDLE; |
1240 |
} |
1241 |
break; |
1242 |
case EG_IDLE: |
1243 |
v->eg_level = 0; |
1244 |
break; |
1245 |
} |
1246 |
envelope = (v->eg_level * master_volume) >> 20; |
1247 |
|
1248 |
// Waveform generator |
1249 |
if (v->mute) |
1250 |
continue; |
1251 |
uint16 output; |
1252 |
|
1253 |
if (!v->test) |
1254 |
v->count += v->add; |
1255 |
|
1256 |
if (v->sync && (v->count > 0x1000000)) |
1257 |
v->mod_to->count = 0; |
1258 |
|
1259 |
v->count &= 0xffffff; |
1260 |
|
1261 |
switch (v->wave) { |
1262 |
case WAVE_TRI: |
1263 |
if (v->ring) |
1264 |
output = TriTable[(v->count ^ (v->mod_by->count & 0x800000)) >> 11]; |
1265 |
else |
1266 |
output = TriTable[v->count >> 11]; |
1267 |
break; |
1268 |
case WAVE_SAW: |
1269 |
output = v->count >> 8; |
1270 |
break; |
1271 |
case WAVE_RECT: |
1272 |
if (v->count > (uint32)(v->pw << 12)) |
1273 |
output = 0xffff; |
1274 |
else |
1275 |
output = 0; |
1276 |
break; |
1277 |
case WAVE_TRISAW: |
1278 |
output = TriSawTable[v->count >> 16]; |
1279 |
break; |
1280 |
case WAVE_TRIRECT: |
1281 |
if (v->count > (uint32)(v->pw << 12)) |
1282 |
output = TriRectTable[v->count >> 16]; |
1283 |
else |
1284 |
output = 0; |
1285 |
break; |
1286 |
case WAVE_SAWRECT: |
1287 |
if (v->count > (uint32)(v->pw << 12)) |
1288 |
output = SawRectTable[v->count >> 16]; |
1289 |
else |
1290 |
output = 0; |
1291 |
break; |
1292 |
case WAVE_TRISAWRECT: |
1293 |
if (v->count > (uint32)(v->pw << 12)) |
1294 |
output = TriSawRectTable[v->count >> 16]; |
1295 |
else |
1296 |
output = 0; |
1297 |
break; |
1298 |
case WAVE_NOISE: |
1299 |
if (v->count > 0x100000) { |
1300 |
output = v->noise = sid_random() << 8; |
1301 |
v->count &= 0xfffff; |
1302 |
} else |
1303 |
output = v->noise; |
1304 |
break; |
1305 |
default: |
1306 |
output = 0x8000; |
1307 |
break; |
1308 |
} |
1309 |
if (v->filter) |
1310 |
sum_output_filter += (int16)(output ^ 0x8000) * envelope; |
1311 |
else |
1312 |
sum_output += (int16)(output ^ 0x8000) * envelope; |
1313 |
} |
1314 |
|
1315 |
// Filter |
1316 |
if (ThePrefs.SIDFilters) { |
1317 |
#ifdef USE_FIXPOINT_MATHS |
1318 |
int32 xn = cf_ampl.imul(sum_output_filter); |
1319 |
int32 yn = xn+cd1.imul(xn1)+cd2.imul(xn2)-cg1.imul(yn1)-cg2.imul(yn2); |
1320 |
yn2 = yn1; yn1 = yn; xn2 = xn1; xn1 = xn; |
1321 |
sum_output_filter = yn; |
1322 |
#else |
1323 |
float xn = (float)sum_output_filter * cf_ampl; |
1324 |
float yn = xn + cd1 * xn1 + cd2 * xn2 - cg1 * yn1 - cg2 * yn2; |
1325 |
yn2 = yn1; yn1 = yn; xn2 = xn1; xn1 = xn; |
1326 |
sum_output_filter = (int32)yn; |
1327 |
#endif |
1328 |
} |
1329 |
|
1330 |
// Write to buffer |
1331 |
#if defined(__riscos__) // lookup in 8k (13bit) translation table |
1332 |
*buf++ = LinToLog[((sum_output + sum_output_filter) >> 13) & 0x1fff]; |
1333 |
#else |
1334 |
*buf++ = (sum_output + sum_output_filter) >> 10; |
1335 |
#endif |
1336 |
} |
1337 |
} |
1338 |
|
1339 |
|
1340 |
// Manufacturer independent sound is still just a dream... |
1341 |
#if defined(__BEOS__) |
1342 |
#include "SID_Be.h" |
1343 |
|
1344 |
#elif defined(AMIGA) |
1345 |
#include "SID_Amiga.h" |
1346 |
|
1347 |
#elif defined(__linux__) |
1348 |
#include "SID_linux.h" |
1349 |
|
1350 |
#elif defined(SUN) |
1351 |
#include "SID_sun.h" |
1352 |
|
1353 |
#elif defined(__hpux) |
1354 |
#include "SID_hp.h" |
1355 |
|
1356 |
#elif defined(__mac__) |
1357 |
#include "SID_mac.h" |
1358 |
|
1359 |
#elif defined(WIN32) |
1360 |
#include "SID_WIN32.h" |
1361 |
|
1362 |
#elif defined(__riscos__) |
1363 |
#include "SID_Acorn.h" |
1364 |
|
1365 |
#else // No sound |
1366 |
void DigitalRenderer::init_sound(void) {ready = false;} |
1367 |
DigitalRenderer::~DigitalRenderer() {} |
1368 |
void DigitalRenderer::EmulateLine(void) {} |
1369 |
void DigitalRenderer::Pause(void) {} |
1370 |
void DigitalRenderer::Resume(void) {} |
1371 |
#endif |
1372 |
|
1373 |
|
1374 |
/* |
1375 |
* Open/close the renderer, according to old and new prefs |
1376 |
*/ |
1377 |
|
1378 |
void MOS6581::open_close_renderer(int old_type, int new_type) |
1379 |
{ |
1380 |
if (old_type == new_type) |
1381 |
return; |
1382 |
|
1383 |
// Delete the old renderer |
1384 |
delete the_renderer; |
1385 |
|
1386 |
// Create new renderer |
1387 |
if (new_type == SIDTYPE_DIGITAL) |
1388 |
#if defined(__BEOS__) || defined(__riscos__) |
1389 |
the_renderer = new DigitalRenderer(the_c64); |
1390 |
#else |
1391 |
the_renderer = new DigitalRenderer; |
1392 |
#endif |
1393 |
#ifdef AMIGA |
1394 |
else if (new_type == SIDTYPE_SIDCARD) |
1395 |
the_renderer = new SIDCardRenderer; |
1396 |
#endif |
1397 |
#ifdef __linux__ |
1398 |
else if (new_type == SIDTYPE_SIDCARD) |
1399 |
the_renderer = new CatweaselRenderer; |
1400 |
#endif |
1401 |
else |
1402 |
the_renderer = NULL; |
1403 |
|
1404 |
// Stuff the current register values into the new renderer |
1405 |
if (the_renderer != NULL) |
1406 |
for (int i=0; i<25; i++) |
1407 |
the_renderer->WriteRegister(i, regs[i]); |
1408 |
} |