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/*
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**
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** File: fmopl.c -- software implementation of FM sound generator
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**
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** Copyright (C) 1999,2000 Tatsuyuki Satoh , MultiArcadeMachineEmurator development
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**
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** Version 0.37a
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**
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*/
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/*
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preliminary :
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Problem :
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note:
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*/
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/* This version of fmopl.c is a fork of the MAME one, relicensed under the LGPL.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#define INLINE static inline |
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#define HAS_YM3812 1 |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <stdarg.h> |
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#include <math.h> |
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//#include "driver.h" /* use M.A.M.E. */
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#include "fmopl.h" |
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#ifndef PI
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#define PI 3.14159265358979323846 |
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#endif
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#ifndef ARRAY_SIZE
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) |
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#endif
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/* -------------------- for debug --------------------- */
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/* #define OPL_OUTPUT_LOG */
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#ifdef OPL_OUTPUT_LOG
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static FILE *opl_dbg_fp = NULL; |
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static FM_OPL *opl_dbg_opl[16]; |
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static int opl_dbg_maxchip,opl_dbg_chip; |
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#endif
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/* -------------------- preliminary define section --------------------- */
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/* attack/decay rate time rate */
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#define OPL_ARRATE 141280 /* RATE 4 = 2826.24ms @ 3.6MHz */ |
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#define OPL_DRRATE 1956000 /* RATE 4 = 39280.64ms @ 3.6MHz */ |
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#define DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */ |
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#define FREQ_BITS 24 /* frequency turn */ |
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/* counter bits = 20 , octerve 7 */
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#define FREQ_RATE (1<<(FREQ_BITS-20)) |
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#define TL_BITS (FREQ_BITS+2) |
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/* final output shift , limit minimum and maximum */
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#define OPL_OUTSB (TL_BITS+3-16) /* OPL output final shift 16bit */ |
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#define OPL_MAXOUT (0x7fff<<OPL_OUTSB) |
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#define OPL_MINOUT (-0x8000<<OPL_OUTSB) |
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/* -------------------- quality selection --------------------- */
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/* sinwave entries */
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/* used static memory = SIN_ENT * 4 (byte) */
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#define SIN_ENT 2048 |
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/* output level entries (envelope,sinwave) */
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/* envelope counter lower bits */
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#define ENV_BITS 16 |
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/* envelope output entries */
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#define EG_ENT 4096 |
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/* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */
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/* used static memory = EG_ENT*4 (byte) */
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#define EG_OFF ((2*EG_ENT)<<ENV_BITS) /* OFF */ |
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#define EG_DED EG_OFF
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#define EG_DST (EG_ENT<<ENV_BITS) /* DECAY START */ |
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#define EG_AED EG_DST
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#define EG_AST 0 /* ATTACK START */ |
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#define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */ |
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/* LFO table entries */
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#define VIB_ENT 512 |
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#define VIB_SHIFT (32-9) |
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#define AMS_ENT 512 |
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#define AMS_SHIFT (32-9) |
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#define VIB_RATE 256 |
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/* -------------------- local defines , macros --------------------- */
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/* register number to channel number , slot offset */
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#define SLOT1 0 |
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#define SLOT2 1 |
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/* envelope phase */
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#define ENV_MOD_RR 0x00 |
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#define ENV_MOD_DR 0x01 |
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#define ENV_MOD_AR 0x02 |
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/* -------------------- tables --------------------- */
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static const int slot_array[32]= |
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{
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0, 2, 4, 1, 3, 5,-1,-1, |
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6, 8,10, 7, 9,11,-1,-1, |
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12,14,16,13,15,17,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1 |
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}; |
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/* key scale level */
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/* table is 3dB/OCT , DV converts this in TL step at 6dB/OCT */
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#define DV (EG_STEP/2) |
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static const UINT32 KSL_TABLE[8*16]= |
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{
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/* OCT 0 */
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
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/* OCT 1 */
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
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0.000/DV, 0.750/DV, 1.125/DV, 1.500/DV, |
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1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV, |
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/* OCT 2 */
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
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0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV, |
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3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV, |
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4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV, |
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/* OCT 3 */
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0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV, |
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3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV, |
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6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV, |
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7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV, |
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/* OCT 4 */
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0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV, |
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6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV, |
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9.000/DV, 9.750/DV,10.125/DV,10.500/DV, |
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10.875/DV,11.250/DV,11.625/DV,12.000/DV, |
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/* OCT 5 */
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0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV, |
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9.000/DV,10.125/DV,10.875/DV,11.625/DV, |
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12.000/DV,12.750/DV,13.125/DV,13.500/DV, |
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13.875/DV,14.250/DV,14.625/DV,15.000/DV, |
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/* OCT 6 */
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0.000/DV, 6.000/DV, 9.000/DV,10.875/DV, |
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12.000/DV,13.125/DV,13.875/DV,14.625/DV, |
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15.000/DV,15.750/DV,16.125/DV,16.500/DV, |
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16.875/DV,17.250/DV,17.625/DV,18.000/DV, |
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/* OCT 7 */
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0.000/DV, 9.000/DV,12.000/DV,13.875/DV, |
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15.000/DV,16.125/DV,16.875/DV,17.625/DV, |
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18.000/DV,18.750/DV,19.125/DV,19.500/DV, |
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19.875/DV,20.250/DV,20.625/DV,21.000/DV |
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}; |
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#undef DV
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/* sustain lebel table (3db per step) */
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/* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/
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#define SC(db) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST |
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static const INT32 SL_TABLE[16]={ |
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SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7), |
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SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31) |
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}; |
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#undef SC
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#define TL_MAX (EG_ENT*2) /* limit(tl + ksr + envelope) + sinwave */ |
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/* TotalLevel : 48 24 12 6 3 1.5 0.75 (dB) */
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/* TL_TABLE[ 0 to TL_MAX ] : plus section */
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/* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */
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static INT32 *TL_TABLE;
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/* pointers to TL_TABLE with sinwave output offset */
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static INT32 **SIN_TABLE;
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/* LFO table */
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static INT32 *AMS_TABLE;
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static INT32 *VIB_TABLE;
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/* envelope output curve table */
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/* attack + decay + OFF */
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static INT32 ENV_CURVE[2*EG_ENT+1]; |
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/* multiple table */
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#define ML 2 |
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static const UINT32 MUL_TABLE[16]= { |
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/* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */
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0.50*ML, 1.00*ML, 2.00*ML, 3.00*ML, 4.00*ML, 5.00*ML, 6.00*ML, 7.00*ML, |
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8.00*ML, 9.00*ML,10.00*ML,10.00*ML,12.00*ML,12.00*ML,15.00*ML,15.00*ML |
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}; |
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#undef ML
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/* dummy attack / decay rate ( when rate == 0 ) */
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static INT32 RATE_0[16]= |
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{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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/* -------------------- static state --------------------- */
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/* lock level of common table */
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static int num_lock = 0; |
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/* work table */
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static void *cur_chip = NULL; /* current chip point */ |
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/* currenct chip state */
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/* static OPLSAMPLE *bufL,*bufR; */
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static OPL_CH *S_CH;
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static OPL_CH *E_CH;
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OPL_SLOT *SLOT7_1,*SLOT7_2,*SLOT8_1,*SLOT8_2; |
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static INT32 outd[1]; |
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static INT32 ams;
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static INT32 vib;
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INT32 *ams_table; |
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INT32 *vib_table; |
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static INT32 amsIncr;
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static INT32 vibIncr;
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static INT32 feedback2; /* connect for SLOT 2 */ |
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/* log output level */
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#define LOG_ERR 3 /* ERROR */ |
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#define LOG_WAR 2 /* WARNING */ |
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#define LOG_INF 1 /* INFORMATION */ |
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//#define LOG_LEVEL LOG_INF
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#define LOG_LEVEL LOG_ERR
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//#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x
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#define LOG(n,x)
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/* --------------------- subroutines --------------------- */
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INLINE int Limit( int val, int max, int min ) { |
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if ( val > max )
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val = max; |
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else if ( val < min ) |
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val = min; |
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return val;
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} |
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/* status set and IRQ handling */
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INLINE void OPL_STATUS_SET(FM_OPL *OPL,int flag) |
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{
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/* set status flag */
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OPL->status |= flag; |
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if(!(OPL->status & 0x80)) |
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{
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if(OPL->status & OPL->statusmask)
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{ /* IRQ on */
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OPL->status |= 0x80;
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/* callback user interrupt handler (IRQ is OFF to ON) */
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if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,1); |
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} |
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} |
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} |
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/* status reset and IRQ handling */
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INLINE void OPL_STATUS_RESET(FM_OPL *OPL,int flag) |
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{
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/* reset status flag */
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OPL->status &=~flag; |
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if((OPL->status & 0x80)) |
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{
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if (!(OPL->status & OPL->statusmask) )
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{
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OPL->status &= 0x7f;
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/* callback user interrupt handler (IRQ is ON to OFF) */
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if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,0); |
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} |
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} |
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} |
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/* IRQ mask set */
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INLINE void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag) |
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{
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OPL->statusmask = flag; |
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/* IRQ handling check */
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OPL_STATUS_SET(OPL,0);
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OPL_STATUS_RESET(OPL,0);
|
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} |
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|
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/* ----- key on ----- */
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INLINE void OPL_KEYON(OPL_SLOT *SLOT)
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{
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/* sin wave restart */
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SLOT->Cnt = 0;
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/* set attack */
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SLOT->evm = ENV_MOD_AR; |
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SLOT->evs = SLOT->evsa; |
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SLOT->evc = EG_AST; |
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SLOT->eve = EG_AED; |
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} |
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/* ----- key off ----- */
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INLINE void OPL_KEYOFF(OPL_SLOT *SLOT)
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{
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if( SLOT->evm > ENV_MOD_RR)
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{
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/* set envelope counter from envleope output */
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SLOT->evm = ENV_MOD_RR; |
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if( !(SLOT->evc&EG_DST) )
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//SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST;
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SLOT->evc = EG_DST; |
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SLOT->eve = EG_DED; |
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SLOT->evs = SLOT->evsr; |
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} |
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} |
| 325 |
|
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/* ---------- calcrate Envelope Generator & Phase Generator ---------- */
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/* return : envelope output */
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INLINE UINT32 OPL_CALC_SLOT( OPL_SLOT *SLOT ) |
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{
|
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/* calcrate envelope generator */
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if( (SLOT->evc+=SLOT->evs) >= SLOT->eve )
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{
|
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switch( SLOT->evm ){
|
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case ENV_MOD_AR: /* ATTACK -> DECAY1 */ |
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/* next DR */
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SLOT->evm = ENV_MOD_DR; |
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SLOT->evc = EG_DST; |
| 338 |
SLOT->eve = SLOT->SL; |
| 339 |
SLOT->evs = SLOT->evsd; |
| 340 |
break;
|
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case ENV_MOD_DR: /* DECAY -> SL or RR */ |
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SLOT->evc = SLOT->SL; |
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SLOT->eve = EG_DED; |
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if(SLOT->eg_typ)
|
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{
|
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SLOT->evs = 0;
|
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} |
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else
|
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{
|
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SLOT->evm = ENV_MOD_RR; |
| 351 |
SLOT->evs = SLOT->evsr; |
| 352 |
} |
| 353 |
break;
|
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case ENV_MOD_RR: /* RR -> OFF */ |
| 355 |
SLOT->evc = EG_OFF; |
| 356 |
SLOT->eve = EG_OFF+1;
|
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SLOT->evs = 0;
|
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break;
|
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} |
| 360 |
} |
| 361 |
/* calcrate envelope */
|
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return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0); |
| 363 |
} |
| 364 |
|
| 365 |
/* set algorythm connection */
|
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static void set_algorythm( OPL_CH *CH) |
| 367 |
{
|
| 368 |
INT32 *carrier = &outd[0];
|
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CH->connect1 = CH->CON ? carrier : &feedback2; |
| 370 |
CH->connect2 = carrier; |
| 371 |
} |
| 372 |
|
| 373 |
/* ---------- frequency counter for operater update ---------- */
|
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INLINE void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT)
|
| 375 |
{
|
| 376 |
int ksr;
|
| 377 |
|
| 378 |
/* frequency step counter */
|
| 379 |
SLOT->Incr = CH->fc * SLOT->mul; |
| 380 |
ksr = CH->kcode >> SLOT->KSR; |
| 381 |
|
| 382 |
if( SLOT->ksr != ksr )
|
| 383 |
{
|
| 384 |
SLOT->ksr = ksr; |
| 385 |
/* attack , decay rate recalcration */
|
| 386 |
SLOT->evsa = SLOT->AR[ksr]; |
| 387 |
SLOT->evsd = SLOT->DR[ksr]; |
| 388 |
SLOT->evsr = SLOT->RR[ksr]; |
| 389 |
} |
| 390 |
SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); |
| 391 |
} |
| 392 |
|
| 393 |
/* set multi,am,vib,EG-TYP,KSR,mul */
|
| 394 |
INLINE void set_mul(FM_OPL *OPL,int slot,int v) |
| 395 |
{
|
| 396 |
OPL_CH *CH = &OPL->P_CH[slot/2];
|
| 397 |
OPL_SLOT *SLOT = &CH->SLOT[slot&1];
|
| 398 |
|
| 399 |
SLOT->mul = MUL_TABLE[v&0x0f];
|
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SLOT->KSR = (v&0x10) ? 0 : 2; |
| 401 |
SLOT->eg_typ = (v&0x20)>>5; |
| 402 |
SLOT->vib = (v&0x40);
|
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SLOT->ams = (v&0x80);
|
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CALC_FCSLOT(CH,SLOT); |
| 405 |
} |
| 406 |
|
| 407 |
/* set ksl & tl */
|
| 408 |
INLINE void set_ksl_tl(FM_OPL *OPL,int slot,int v) |
| 409 |
{
|
| 410 |
OPL_CH *CH = &OPL->P_CH[slot/2];
|
| 411 |
OPL_SLOT *SLOT = &CH->SLOT[slot&1];
|
| 412 |
int ksl = v>>6; /* 0 / 1.5 / 3 / 6 db/OCT */ |
| 413 |
|
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SLOT->ksl = ksl ? 3-ksl : 31; |
| 415 |
SLOT->TL = (v&0x3f)*(0.75/EG_STEP); /* 0.75db step */ |
| 416 |
|
| 417 |
if( !(OPL->mode&0x80) ) |
| 418 |
{ /* not CSM latch total level */
|
| 419 |
SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); |
| 420 |
} |
| 421 |
} |
| 422 |
|
| 423 |
/* set attack rate & decay rate */
|
| 424 |
INLINE void set_ar_dr(FM_OPL *OPL,int slot,int v) |
| 425 |
{
|
| 426 |
OPL_CH *CH = &OPL->P_CH[slot/2];
|
| 427 |
OPL_SLOT *SLOT = &CH->SLOT[slot&1];
|
| 428 |
int ar = v>>4; |
| 429 |
int dr = v&0x0f; |
| 430 |
|
| 431 |
SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0;
|
| 432 |
SLOT->evsa = SLOT->AR[SLOT->ksr]; |
| 433 |
if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa;
|
| 434 |
|
| 435 |
SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0;
|
| 436 |
SLOT->evsd = SLOT->DR[SLOT->ksr]; |
| 437 |
if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd;
|
| 438 |
} |
| 439 |
|
| 440 |
/* set sustain level & release rate */
|
| 441 |
INLINE void set_sl_rr(FM_OPL *OPL,int slot,int v) |
| 442 |
{
|
| 443 |
OPL_CH *CH = &OPL->P_CH[slot/2];
|
| 444 |
OPL_SLOT *SLOT = &CH->SLOT[slot&1];
|
| 445 |
int sl = v>>4; |
| 446 |
int rr = v & 0x0f; |
| 447 |
|
| 448 |
SLOT->SL = SL_TABLE[sl]; |
| 449 |
if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL;
|
| 450 |
SLOT->RR = &OPL->DR_TABLE[rr<<2];
|
| 451 |
SLOT->evsr = SLOT->RR[SLOT->ksr]; |
| 452 |
if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr;
|
| 453 |
} |
| 454 |
|
| 455 |
/* operator output calcrator */
|
| 456 |
#define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env] |
| 457 |
/* ---------- calcrate one of channel ---------- */
|
| 458 |
INLINE void OPL_CALC_CH( OPL_CH *CH )
|
| 459 |
{
|
| 460 |
UINT32 env_out; |
| 461 |
OPL_SLOT *SLOT; |
| 462 |
|
| 463 |
feedback2 = 0;
|
| 464 |
/* SLOT 1 */
|
| 465 |
SLOT = &CH->SLOT[SLOT1]; |
| 466 |
env_out=OPL_CALC_SLOT(SLOT); |
| 467 |
if( env_out < EG_ENT-1 ) |
| 468 |
{
|
| 469 |
/* PG */
|
| 470 |
if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
|
| 471 |
else SLOT->Cnt += SLOT->Incr;
|
| 472 |
/* connectoion */
|
| 473 |
if(CH->FB)
|
| 474 |
{
|
| 475 |
int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB; |
| 476 |
CH->op1_out[1] = CH->op1_out[0]; |
| 477 |
*CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1);
|
| 478 |
} |
| 479 |
else
|
| 480 |
{
|
| 481 |
*CH->connect1 += OP_OUT(SLOT,env_out,0);
|
| 482 |
} |
| 483 |
}else
|
| 484 |
{
|
| 485 |
CH->op1_out[1] = CH->op1_out[0]; |
| 486 |
CH->op1_out[0] = 0; |
| 487 |
} |
| 488 |
/* SLOT 2 */
|
| 489 |
SLOT = &CH->SLOT[SLOT2]; |
| 490 |
env_out=OPL_CALC_SLOT(SLOT); |
| 491 |
if( env_out < EG_ENT-1 ) |
| 492 |
{
|
| 493 |
/* PG */
|
| 494 |
if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
|
| 495 |
else SLOT->Cnt += SLOT->Incr;
|
| 496 |
/* connectoion */
|
| 497 |
outd[0] += OP_OUT(SLOT,env_out, feedback2);
|
| 498 |
} |
| 499 |
} |
| 500 |
|
| 501 |
/* ---------- calcrate rythm block ---------- */
|
| 502 |
#define WHITE_NOISE_db 6.0 |
| 503 |
INLINE void OPL_CALC_RH( OPL_CH *CH )
|
| 504 |
{
|
| 505 |
UINT32 env_tam,env_sd,env_top,env_hh; |
| 506 |
int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP); |
| 507 |
INT32 tone8; |
| 508 |
|
| 509 |
OPL_SLOT *SLOT; |
| 510 |
int env_out;
|
| 511 |
|
| 512 |
/* BD : same as FM serial mode and output level is large */
|
| 513 |
feedback2 = 0;
|
| 514 |
/* SLOT 1 */
|
| 515 |
SLOT = &CH[6].SLOT[SLOT1];
|
| 516 |
env_out=OPL_CALC_SLOT(SLOT); |
| 517 |
if( env_out < EG_ENT-1 ) |
| 518 |
{
|
| 519 |
/* PG */
|
| 520 |
if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
|
| 521 |
else SLOT->Cnt += SLOT->Incr;
|
| 522 |
/* connectoion */
|
| 523 |
if(CH[6].FB) |
| 524 |
{
|
| 525 |
int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB; |
| 526 |
CH[6].op1_out[1] = CH[6].op1_out[0]; |
| 527 |
feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1); |
| 528 |
} |
| 529 |
else
|
| 530 |
{
|
| 531 |
feedback2 = OP_OUT(SLOT,env_out,0);
|
| 532 |
} |
| 533 |
}else
|
| 534 |
{
|
| 535 |
feedback2 = 0;
|
| 536 |
CH[6].op1_out[1] = CH[6].op1_out[0]; |
| 537 |
CH[6].op1_out[0] = 0; |
| 538 |
} |
| 539 |
/* SLOT 2 */
|
| 540 |
SLOT = &CH[6].SLOT[SLOT2];
|
| 541 |
env_out=OPL_CALC_SLOT(SLOT); |
| 542 |
if( env_out < EG_ENT-1 ) |
| 543 |
{
|
| 544 |
/* PG */
|
| 545 |
if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
|
| 546 |
else SLOT->Cnt += SLOT->Incr;
|
| 547 |
/* connectoion */
|
| 548 |
outd[0] += OP_OUT(SLOT,env_out, feedback2)*2; |
| 549 |
} |
| 550 |
|
| 551 |
// SD (17) = mul14[fnum7] + white noise
|
| 552 |
// TAM (15) = mul15[fnum8]
|
| 553 |
// TOP (18) = fnum6(mul18[fnum8]+whitenoise)
|
| 554 |
// HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise
|
| 555 |
env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise; |
| 556 |
env_tam=OPL_CALC_SLOT(SLOT8_1); |
| 557 |
env_top=OPL_CALC_SLOT(SLOT8_2); |
| 558 |
env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise; |
| 559 |
|
| 560 |
/* PG */
|
| 561 |
if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE); |
| 562 |
else SLOT7_1->Cnt += 2*SLOT7_1->Incr; |
| 563 |
if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE); |
| 564 |
else SLOT7_2->Cnt += (CH[7].fc*8); |
| 565 |
if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE);
|
| 566 |
else SLOT8_1->Cnt += SLOT8_1->Incr;
|
| 567 |
if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE); |
| 568 |
else SLOT8_2->Cnt += (CH[8].fc*48); |
| 569 |
|
| 570 |
tone8 = OP_OUT(SLOT8_2,whitenoise,0 );
|
| 571 |
|
| 572 |
/* SD */
|
| 573 |
if( env_sd < EG_ENT-1 ) |
| 574 |
outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8; |
| 575 |
/* TAM */
|
| 576 |
if( env_tam < EG_ENT-1 ) |
| 577 |
outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2; |
| 578 |
/* TOP-CY */
|
| 579 |
if( env_top < EG_ENT-1 ) |
| 580 |
outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2; |
| 581 |
/* HH */
|
| 582 |
if( env_hh < EG_ENT-1 ) |
| 583 |
outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2; |
| 584 |
} |
| 585 |
|
| 586 |
/* ----------- initialize time tabls ----------- */
|
| 587 |
static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE ) |
| 588 |
{
|
| 589 |
int i;
|
| 590 |
double rate;
|
| 591 |
|
| 592 |
/* make attack rate & decay rate tables */
|
| 593 |
for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0; |
| 594 |
for (i = 4;i <= 60;i++){ |
| 595 |
rate = OPL->freqbase; /* frequency rate */
|
| 596 |
if( i < 60 ) rate *= 1.0+(i&3)*0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */ |
| 597 |
rate *= 1<<((i>>2)-1); /* b2-5 : shift bit */ |
| 598 |
rate *= (double)(EG_ENT<<ENV_BITS);
|
| 599 |
OPL->AR_TABLE[i] = rate / ARRATE; |
| 600 |
OPL->DR_TABLE[i] = rate / DRRATE; |
| 601 |
} |
| 602 |
for (i = 60; i < ARRAY_SIZE(OPL->AR_TABLE); i++) |
| 603 |
{
|
| 604 |
OPL->AR_TABLE[i] = EG_AED-1;
|
| 605 |
OPL->DR_TABLE[i] = OPL->DR_TABLE[60];
|
| 606 |
} |
| 607 |
#if 0
|
| 608 |
for (i = 0;i < 64 ;i++){ /* make for overflow area */
|
| 609 |
LOG(LOG_WAR,("rate %2d , ar %f ms , dr %f ms \n",i,
|
| 610 |
((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate),
|
| 611 |
((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) ));
|
| 612 |
}
|
| 613 |
#endif
|
| 614 |
} |
| 615 |
|
| 616 |
/* ---------- generic table initialize ---------- */
|
| 617 |
static int OPLOpenTable( void ) |
| 618 |
{
|
| 619 |
int s,t;
|
| 620 |
double rate;
|
| 621 |
int i,j;
|
| 622 |
double pom;
|
| 623 |
|
| 624 |
/* allocate dynamic tables */
|
| 625 |
if( (TL_TABLE = malloc(TL_MAX*2*sizeof(INT32))) == NULL) |
| 626 |
return 0; |
| 627 |
if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(INT32 *))) == NULL) |
| 628 |
{
|
| 629 |
free(TL_TABLE); |
| 630 |
return 0; |
| 631 |
} |
| 632 |
if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(INT32))) == NULL) |
| 633 |
{
|
| 634 |
free(TL_TABLE); |
| 635 |
free(SIN_TABLE); |
| 636 |
return 0; |
| 637 |
} |
| 638 |
if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(INT32))) == NULL) |
| 639 |
{
|
| 640 |
free(TL_TABLE); |
| 641 |
free(SIN_TABLE); |
| 642 |
free(AMS_TABLE); |
| 643 |
return 0; |
| 644 |
} |
| 645 |
/* make total level table */
|
| 646 |
for (t = 0;t < EG_ENT-1 ;t++){ |
| 647 |
rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20); /* dB -> voltage */ |
| 648 |
TL_TABLE[ t] = (int)rate;
|
| 649 |
TL_TABLE[TL_MAX+t] = -TL_TABLE[t]; |
| 650 |
/* LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/
|
| 651 |
} |
| 652 |
/* fill volume off area */
|
| 653 |
for ( t = EG_ENT-1; t < TL_MAX ;t++){ |
| 654 |
TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0;
|
| 655 |
} |
| 656 |
|
| 657 |
/* make sinwave table (total level offet) */
|
| 658 |
/* degree 0 = degree 180 = off */
|
| 659 |
SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2] = &TL_TABLE[EG_ENT-1]; |
| 660 |
for (s = 1;s <= SIN_ENT/4;s++){ |
| 661 |
pom = sin(2*PI*s/SIN_ENT); /* sin */ |
| 662 |
pom = 20*log10(1/pom); /* decibel */ |
| 663 |
j = pom / EG_STEP; /* TL_TABLE steps */
|
| 664 |
|
| 665 |
/* degree 0 - 90 , degree 180 - 90 : plus section */
|
| 666 |
SIN_TABLE[ s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j];
|
| 667 |
/* degree 180 - 270 , degree 360 - 270 : minus section */
|
| 668 |
SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT -s] = &TL_TABLE[TL_MAX+j];
|
| 669 |
/* LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/
|
| 670 |
} |
| 671 |
for (s = 0;s < SIN_ENT;s++) |
| 672 |
{
|
| 673 |
SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT]; |
| 674 |
SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)]; |
| 675 |
SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s]; |
| 676 |
} |
| 677 |
|
| 678 |
/* envelope counter -> envelope output table */
|
| 679 |
for (i=0; i<EG_ENT; i++) |
| 680 |
{
|
| 681 |
/* ATTACK curve */
|
| 682 |
pom = pow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT; |
| 683 |
/* if( pom >= EG_ENT ) pom = EG_ENT-1; */
|
| 684 |
ENV_CURVE[i] = (int)pom;
|
| 685 |
/* DECAY ,RELEASE curve */
|
| 686 |
ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i; |
| 687 |
} |
| 688 |
/* off */
|
| 689 |
ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1;
|
| 690 |
/* make LFO ams table */
|
| 691 |
for (i=0; i<AMS_ENT; i++) |
| 692 |
{
|
| 693 |
pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */ |
| 694 |
AMS_TABLE[i] = (1.0/EG_STEP)*pom; /* 1dB */ |
| 695 |
AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom; /* 4.8dB */ |
| 696 |
} |
| 697 |
/* make LFO vibrate table */
|
| 698 |
for (i=0; i<VIB_ENT; i++) |
| 699 |
{
|
| 700 |
/* 100cent = 1seminote = 6% ?? */
|
| 701 |
pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */ |
| 702 |
VIB_TABLE[i] = VIB_RATE + (pom*0.07); /* +- 7cent */ |
| 703 |
VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14); /* +-14cent */ |
| 704 |
/* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */
|
| 705 |
} |
| 706 |
return 1; |
| 707 |
} |
| 708 |
|
| 709 |
|
| 710 |
static void OPLCloseTable( void ) |
| 711 |
{
|
| 712 |
free(TL_TABLE); |
| 713 |
free(SIN_TABLE); |
| 714 |
free(AMS_TABLE); |
| 715 |
free(VIB_TABLE); |
| 716 |
} |
| 717 |
|
| 718 |
/* CSM Key Controll */
|
| 719 |
INLINE void CSMKeyControll(OPL_CH *CH)
|
| 720 |
{
|
| 721 |
OPL_SLOT *slot1 = &CH->SLOT[SLOT1]; |
| 722 |
OPL_SLOT *slot2 = &CH->SLOT[SLOT2]; |
| 723 |
/* all key off */
|
| 724 |
OPL_KEYOFF(slot1); |
| 725 |
OPL_KEYOFF(slot2); |
| 726 |
/* total level latch */
|
| 727 |
slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); |
| 728 |
slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); |
| 729 |
/* key on */
|
| 730 |
CH->op1_out[0] = CH->op1_out[1] = 0; |
| 731 |
OPL_KEYON(slot1); |
| 732 |
OPL_KEYON(slot2); |
| 733 |
} |
| 734 |
|
| 735 |
/* ---------- opl initialize ---------- */
|
| 736 |
static void OPL_initalize(FM_OPL *OPL) |
| 737 |
{
|
| 738 |
int fn;
|
| 739 |
|
| 740 |
/* frequency base */
|
| 741 |
OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0; |
| 742 |
/* Timer base time */
|
| 743 |
OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 ); |
| 744 |
/* make time tables */
|
| 745 |
init_timetables( OPL , OPL_ARRATE , OPL_DRRATE ); |
| 746 |
/* make fnumber -> increment counter table */
|
| 747 |
for( fn=0 ; fn < 1024 ; fn++ ) |
| 748 |
{
|
| 749 |
OPL->FN_TABLE[fn] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2; |
| 750 |
} |
| 751 |
/* LFO freq.table */
|
| 752 |
OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0; |
| 753 |
OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0; |
| 754 |
} |
| 755 |
|
| 756 |
/* ---------- write a OPL registers ---------- */
|
| 757 |
static void OPLWriteReg(FM_OPL *OPL, int r, int v) |
| 758 |
{
|
| 759 |
OPL_CH *CH; |
| 760 |
int slot;
|
| 761 |
int block_fnum;
|
| 762 |
|
| 763 |
switch(r&0xe0) |
| 764 |
{
|
| 765 |
case 0x00: /* 00-1f:controll */ |
| 766 |
switch(r&0x1f) |
| 767 |
{
|
| 768 |
case 0x01: |
| 769 |
/* wave selector enable */
|
| 770 |
if(OPL->type&OPL_TYPE_WAVESEL)
|
| 771 |
{
|
| 772 |
OPL->wavesel = v&0x20;
|
| 773 |
if(!OPL->wavesel)
|
| 774 |
{
|
| 775 |
/* preset compatible mode */
|
| 776 |
int c;
|
| 777 |
for(c=0;c<OPL->max_ch;c++) |
| 778 |
{
|
| 779 |
OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0];
|
| 780 |
OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0];
|
| 781 |
} |
| 782 |
} |
| 783 |
} |
| 784 |
return;
|
| 785 |
case 0x02: /* Timer 1 */ |
| 786 |
OPL->T[0] = (256-v)*4; |
| 787 |
break;
|
| 788 |
case 0x03: /* Timer 2 */ |
| 789 |
OPL->T[1] = (256-v)*16; |
| 790 |
return;
|
| 791 |
case 0x04: /* IRQ clear / mask and Timer enable */ |
| 792 |
if(v&0x80) |
| 793 |
{ /* IRQ flag clear */
|
| 794 |
OPL_STATUS_RESET(OPL,0x7f);
|
| 795 |
} |
| 796 |
else
|
| 797 |
{ /* set IRQ mask ,timer enable*/
|
| 798 |
UINT8 st1 = v&1;
|
| 799 |
UINT8 st2 = (v>>1)&1; |
| 800 |
/* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */
|
| 801 |
OPL_STATUS_RESET(OPL,v&0x78);
|
| 802 |
OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01); |
| 803 |
/* timer 2 */
|
| 804 |
if(OPL->st[1] != st2) |
| 805 |
{
|
| 806 |
double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0; |
| 807 |
OPL->st[1] = st2;
|
| 808 |
if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+1,interval); |
| 809 |
} |
| 810 |
/* timer 1 */
|
| 811 |
if(OPL->st[0] != st1) |
| 812 |
{
|
| 813 |
double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0; |
| 814 |
OPL->st[0] = st1;
|
| 815 |
if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+0,interval); |
| 816 |
} |
| 817 |
} |
| 818 |
return;
|
| 819 |
#if BUILD_Y8950
|
| 820 |
case 0x06: /* Key Board OUT */ |
| 821 |
if(OPL->type&OPL_TYPE_KEYBOARD)
|
| 822 |
{
|
| 823 |
if(OPL->keyboardhandler_w)
|
| 824 |
OPL->keyboardhandler_w(OPL->keyboard_param,v); |
| 825 |
else
|
| 826 |
LOG(LOG_WAR,("OPL:write unmapped KEYBOARD port\n"));
|
| 827 |
} |
| 828 |
return;
|
| 829 |
case 0x07: /* DELTA-T controll : START,REC,MEMDATA,REPT,SPOFF,x,x,RST */ |
| 830 |
if(OPL->type&OPL_TYPE_ADPCM)
|
| 831 |
YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v);
|
| 832 |
return;
|
| 833 |
case 0x08: /* MODE,DELTA-T : CSM,NOTESEL,x,x,smpl,da/ad,64k,rom */ |
| 834 |
OPL->mode = v; |
| 835 |
v&=0x1f; /* for DELTA-T unit */ |
| 836 |
case 0x09: /* START ADD */ |
| 837 |
case 0x0a: |
| 838 |
case 0x0b: /* STOP ADD */ |
| 839 |
case 0x0c: |
| 840 |
case 0x0d: /* PRESCALE */ |
| 841 |
case 0x0e: |
| 842 |
case 0x0f: /* ADPCM data */ |
| 843 |
case 0x10: /* DELTA-N */ |
| 844 |
case 0x11: /* DELTA-N */ |
| 845 |
case 0x12: /* EG-CTRL */ |
| 846 |
if(OPL->type&OPL_TYPE_ADPCM)
|
| 847 |
YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v);
|
| 848 |
return;
|
| 849 |
#if 0
|
| 850 |
case 0x15: /* DAC data */
|
| 851 |
case 0x16:
|
| 852 |
case 0x17: /* SHIFT */
|
| 853 |
return;
|
| 854 |
case 0x18: /* I/O CTRL (Direction) */
|
| 855 |
if(OPL->type&OPL_TYPE_IO)
|
| 856 |
OPL->portDirection = v&0x0f;
|
| 857 |
return;
|
| 858 |
case 0x19: /* I/O DATA */
|
| 859 |
if(OPL->type&OPL_TYPE_IO)
|
| 860 |
{
|
| 861 |
OPL->portLatch = v;
|
| 862 |
if(OPL->porthandler_w)
|
| 863 |
OPL->porthandler_w(OPL->port_param,v&OPL->portDirection);
|
| 864 |
}
|
| 865 |
return;
|
| 866 |
case 0x1a: /* PCM data */
|
| 867 |
return;
|
| 868 |
#endif
|
| 869 |
#endif
|
| 870 |
} |
| 871 |
break;
|
| 872 |
case 0x20: /* am,vib,ksr,eg type,mul */ |
| 873 |
slot = slot_array[r&0x1f];
|
| 874 |
if(slot == -1) return; |
| 875 |
set_mul(OPL,slot,v); |
| 876 |
return;
|
| 877 |
case 0x40: |
| 878 |
slot = slot_array[r&0x1f];
|
| 879 |
if(slot == -1) return; |
| 880 |
set_ksl_tl(OPL,slot,v); |
| 881 |
return;
|
| 882 |
case 0x60: |
| 883 |
slot = slot_array[r&0x1f];
|
| 884 |
if(slot == -1) return; |
| 885 |
set_ar_dr(OPL,slot,v); |
| 886 |
return;
|
| 887 |
case 0x80: |
| 888 |
slot = slot_array[r&0x1f];
|
| 889 |
if(slot == -1) return; |
| 890 |
set_sl_rr(OPL,slot,v); |
| 891 |
return;
|
| 892 |
case 0xa0: |
| 893 |
switch(r)
|
| 894 |
{
|
| 895 |
case 0xbd: |
| 896 |
/* amsep,vibdep,r,bd,sd,tom,tc,hh */
|
| 897 |
{
|
| 898 |
UINT8 rkey = OPL->rythm^v; |
| 899 |
OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0]; |
| 900 |
OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0]; |
| 901 |
OPL->rythm = v&0x3f;
|
| 902 |
if(OPL->rythm&0x20) |
| 903 |
{
|
| 904 |
#if 0
|
| 905 |
usrintf_showmessage("OPL Rythm mode select");
|
| 906 |
#endif
|
| 907 |
/* BD key on/off */
|
| 908 |
if(rkey&0x10) |
| 909 |
{
|
| 910 |
if(v&0x10) |
| 911 |
{
|
| 912 |
OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0; |
| 913 |
OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]);
|
| 914 |
OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]);
|
| 915 |
} |
| 916 |
else
|
| 917 |
{
|
| 918 |
OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]);
|
| 919 |
OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]);
|
| 920 |
} |
| 921 |
} |
| 922 |
/* SD key on/off */
|
| 923 |
if(rkey&0x08) |
| 924 |
{
|
| 925 |
if(v&0x08) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]); |
| 926 |
else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]); |
| 927 |
}/* TAM key on/off */
|
| 928 |
if(rkey&0x04) |
| 929 |
{
|
| 930 |
if(v&0x04) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]); |
| 931 |
else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]); |
| 932 |
} |
| 933 |
/* TOP-CY key on/off */
|
| 934 |
if(rkey&0x02) |
| 935 |
{
|
| 936 |
if(v&0x02) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]); |
| 937 |
else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]); |
| 938 |
} |
| 939 |
/* HH key on/off */
|
| 940 |
if(rkey&0x01) |
| 941 |
{
|
| 942 |
if(v&0x01) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]); |
| 943 |
else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]); |
| 944 |
} |
| 945 |
} |
| 946 |
} |
| 947 |
return;
|
| 948 |
} |
| 949 |
/* keyon,block,fnum */
|
| 950 |
if( (r&0x0f) > 8) return; |
| 951 |
CH = &OPL->P_CH[r&0x0f];
|
| 952 |
if(!(r&0x10)) |
| 953 |
{ /* a0-a8 */
|
| 954 |
block_fnum = (CH->block_fnum&0x1f00) | v;
|
| 955 |
} |
| 956 |
else
|
| 957 |
{ /* b0-b8 */
|
| 958 |
int keyon = (v>>5)&1; |
| 959 |
block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff); |
| 960 |
if(CH->keyon != keyon)
|
| 961 |
{
|
| 962 |
if( (CH->keyon=keyon) )
|
| 963 |
{
|
| 964 |
CH->op1_out[0] = CH->op1_out[1] = 0; |
| 965 |
OPL_KEYON(&CH->SLOT[SLOT1]); |
| 966 |
OPL_KEYON(&CH->SLOT[SLOT2]); |
| 967 |
} |
| 968 |
else
|
| 969 |
{
|
| 970 |
OPL_KEYOFF(&CH->SLOT[SLOT1]); |
| 971 |
OPL_KEYOFF(&CH->SLOT[SLOT2]); |
| 972 |
} |
| 973 |
} |
| 974 |
} |
| 975 |
/* update */
|
| 976 |
if(CH->block_fnum != block_fnum)
|
| 977 |
{
|
| 978 |
int blockRv = 7-(block_fnum>>10); |
| 979 |
int fnum = block_fnum&0x3ff; |
| 980 |
CH->block_fnum = block_fnum; |
| 981 |
|
| 982 |
CH->ksl_base = KSL_TABLE[block_fnum>>6];
|
| 983 |
CH->fc = OPL->FN_TABLE[fnum]>>blockRv; |
| 984 |
CH->kcode = CH->block_fnum>>9;
|
| 985 |
if( (OPL->mode&0x40) && CH->block_fnum&0x100) CH->kcode |=1; |
| 986 |
CALC_FCSLOT(CH,&CH->SLOT[SLOT1]); |
| 987 |
CALC_FCSLOT(CH,&CH->SLOT[SLOT2]); |
| 988 |
} |
| 989 |
return;
|
| 990 |
case 0xc0: |
| 991 |
/* FB,C */
|
| 992 |
if( (r&0x0f) > 8) return; |
| 993 |
CH = &OPL->P_CH[r&0x0f];
|
| 994 |
{
|
| 995 |
int feedback = (v>>1)&7; |
| 996 |
CH->FB = feedback ? (8+1) - feedback : 0; |
| 997 |
CH->CON = v&1;
|
| 998 |
set_algorythm(CH); |
| 999 |
} |
| 1000 |
return;
|
| 1001 |
case 0xe0: /* wave type */ |
| 1002 |
slot = slot_array[r&0x1f];
|
| 1003 |
if(slot == -1) return; |
| 1004 |
CH = &OPL->P_CH[slot/2];
|
| 1005 |
if(OPL->wavesel)
|
| 1006 |
{
|
| 1007 |
/* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */
|
| 1008 |
CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT]; |
| 1009 |
} |
| 1010 |
return;
|
| 1011 |
} |
| 1012 |
} |
| 1013 |
|
| 1014 |
/* lock/unlock for common table */
|
| 1015 |
static int OPL_LockTable(void) |
| 1016 |
{
|
| 1017 |
num_lock++; |
| 1018 |
if(num_lock>1) return 0; |
| 1019 |
/* first time */
|
| 1020 |
cur_chip = NULL;
|
| 1021 |
/* allocate total level table (128kb space) */
|
| 1022 |
if( !OPLOpenTable() )
|
| 1023 |
{
|
| 1024 |
num_lock--; |
| 1025 |
return -1; |
| 1026 |
} |
| 1027 |
return 0; |
| 1028 |
} |
| 1029 |
|
| 1030 |
static void OPL_UnLockTable(void) |
| 1031 |
{
|
| 1032 |
if(num_lock) num_lock--;
|
| 1033 |
if(num_lock) return; |
| 1034 |
/* last time */
|
| 1035 |
cur_chip = NULL;
|
| 1036 |
OPLCloseTable(); |
| 1037 |
} |
| 1038 |
|
| 1039 |
#if (BUILD_YM3812 || BUILD_YM3526)
|
| 1040 |
/*******************************************************************************/
|
| 1041 |
/* YM3812 local section */
|
| 1042 |
/*******************************************************************************/
|
| 1043 |
|
| 1044 |
/* ---------- update one of chip ----------- */
|
| 1045 |
void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, int length) |
| 1046 |
{
|
| 1047 |
int i;
|
| 1048 |
int data;
|
| 1049 |
OPLSAMPLE *buf = buffer; |
| 1050 |
UINT32 amsCnt = OPL->amsCnt; |
| 1051 |
UINT32 vibCnt = OPL->vibCnt; |
| 1052 |
UINT8 rythm = OPL->rythm&0x20;
|
| 1053 |
OPL_CH *CH,*R_CH; |
| 1054 |
|
| 1055 |
if( (void *)OPL != cur_chip ){ |
| 1056 |
cur_chip = (void *)OPL;
|
| 1057 |
/* channel pointers */
|
| 1058 |
S_CH = OPL->P_CH; |
| 1059 |
E_CH = &S_CH[9];
|
| 1060 |
/* rythm slot */
|
| 1061 |
SLOT7_1 = &S_CH[7].SLOT[SLOT1];
|
| 1062 |
SLOT7_2 = &S_CH[7].SLOT[SLOT2];
|
| 1063 |
SLOT8_1 = &S_CH[8].SLOT[SLOT1];
|
| 1064 |
SLOT8_2 = &S_CH[8].SLOT[SLOT2];
|
| 1065 |
/* LFO state */
|
| 1066 |
amsIncr = OPL->amsIncr; |
| 1067 |
vibIncr = OPL->vibIncr; |
| 1068 |
ams_table = OPL->ams_table; |
| 1069 |
vib_table = OPL->vib_table; |
| 1070 |
} |
| 1071 |
R_CH = rythm ? &S_CH[6] : E_CH;
|
| 1072 |
for( i=0; i < length ; i++ ) |
| 1073 |
{
|
| 1074 |
/* channel A channel B channel C */
|
| 1075 |
/* LFO */
|
| 1076 |
ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT]; |
| 1077 |
vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT]; |
| 1078 |
outd[0] = 0; |
| 1079 |
/* FM part */
|
| 1080 |
for(CH=S_CH ; CH < R_CH ; CH++)
|
| 1081 |
OPL_CALC_CH(CH); |
| 1082 |
/* Rythn part */
|
| 1083 |
if(rythm)
|
| 1084 |
OPL_CALC_RH(S_CH); |
| 1085 |
/* limit check */
|
| 1086 |
data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT );
|
| 1087 |
/* store to sound buffer */
|
| 1088 |
buf[i] = data >> OPL_OUTSB; |
| 1089 |
} |
| 1090 |
|
| 1091 |
OPL->amsCnt = amsCnt; |
| 1092 |
OPL->vibCnt = vibCnt; |
| 1093 |
#ifdef OPL_OUTPUT_LOG
|
| 1094 |
if(opl_dbg_fp)
|
| 1095 |
{
|
| 1096 |
for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) |
| 1097 |
if( opl_dbg_opl[opl_dbg_chip] == OPL) break; |
| 1098 |
fprintf(opl_dbg_fp,"%c%c%c",0x20+opl_dbg_chip,length&0xff,length/256); |
| 1099 |
} |
| 1100 |
#endif
|
| 1101 |
} |
| 1102 |
#endif /* (BUILD_YM3812 || BUILD_YM3526) */ |
| 1103 |
|
| 1104 |
#if BUILD_Y8950
|
| 1105 |
|
| 1106 |
void Y8950UpdateOne(FM_OPL *OPL, INT16 *buffer, int length) |
| 1107 |
{
|
| 1108 |
int i;
|
| 1109 |
int data;
|
| 1110 |
OPLSAMPLE *buf = buffer; |
| 1111 |
UINT32 amsCnt = OPL->amsCnt; |
| 1112 |
UINT32 vibCnt = OPL->vibCnt; |
| 1113 |
UINT8 rythm = OPL->rythm&0x20;
|
| 1114 |
OPL_CH *CH,*R_CH; |
| 1115 |
YM_DELTAT *DELTAT = OPL->deltat; |
| 1116 |
|
| 1117 |
/* setup DELTA-T unit */
|
| 1118 |
YM_DELTAT_DECODE_PRESET(DELTAT); |
| 1119 |
|
| 1120 |
if( (void *)OPL != cur_chip ){ |
| 1121 |
cur_chip = (void *)OPL;
|
| 1122 |
/* channel pointers */
|
| 1123 |
S_CH = OPL->P_CH; |
| 1124 |
E_CH = &S_CH[9];
|
| 1125 |
/* rythm slot */
|
| 1126 |
SLOT7_1 = &S_CH[7].SLOT[SLOT1];
|
| 1127 |
SLOT7_2 = &S_CH[7].SLOT[SLOT2];
|
| 1128 |
SLOT8_1 = &S_CH[8].SLOT[SLOT1];
|
| 1129 |
SLOT8_2 = &S_CH[8].SLOT[SLOT2];
|
| 1130 |
/* LFO state */
|
| 1131 |
amsIncr = OPL->amsIncr; |
| 1132 |
vibIncr = OPL->vibIncr; |
| 1133 |
ams_table = OPL->ams_table; |
| 1134 |
vib_table = OPL->vib_table; |
| 1135 |
} |
| 1136 |
R_CH = rythm ? &S_CH[6] : E_CH;
|
| 1137 |
for( i=0; i < length ; i++ ) |
| 1138 |
{
|
| 1139 |
/* channel A channel B channel C */
|
| 1140 |
/* LFO */
|
| 1141 |
ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT]; |
| 1142 |
vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT]; |
| 1143 |
outd[0] = 0; |
| 1144 |
/* deltaT ADPCM */
|
| 1145 |
if( DELTAT->portstate )
|
| 1146 |
YM_DELTAT_ADPCM_CALC(DELTAT); |
| 1147 |
/* FM part */
|
| 1148 |
for(CH=S_CH ; CH < R_CH ; CH++)
|
| 1149 |
OPL_CALC_CH(CH); |
| 1150 |
/* Rythn part */
|
| 1151 |
if(rythm)
|
| 1152 |
OPL_CALC_RH(S_CH); |
| 1153 |
/* limit check */
|
| 1154 |
data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT );
|
| 1155 |
/* store to sound buffer */
|
| 1156 |
buf[i] = data >> OPL_OUTSB; |
| 1157 |
} |
| 1158 |
OPL->amsCnt = amsCnt; |
| 1159 |
OPL->vibCnt = vibCnt; |
| 1160 |
/* deltaT START flag */
|
| 1161 |
if( !DELTAT->portstate )
|
| 1162 |
OPL->status &= 0xfe;
|
| 1163 |
} |
| 1164 |
#endif
|
| 1165 |
|
| 1166 |
/* ---------- reset one of chip ---------- */
|
| 1167 |
void OPLResetChip(FM_OPL *OPL)
|
| 1168 |
{
|
| 1169 |
int c,s;
|
| 1170 |
int i;
|
| 1171 |
|
| 1172 |
/* reset chip */
|
| 1173 |
OPL->mode = 0; /* normal mode */ |
| 1174 |
OPL_STATUS_RESET(OPL,0x7f);
|
| 1175 |
/* reset with register write */
|
| 1176 |
OPLWriteReg(OPL,0x01,0); /* wabesel disable */ |
| 1177 |
OPLWriteReg(OPL,0x02,0); /* Timer1 */ |
| 1178 |
OPLWriteReg(OPL,0x03,0); /* Timer2 */ |
| 1179 |
OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */ |
| 1180 |
for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0); |
| 1181 |
/* reset OPerator paramater */
|
| 1182 |
for( c = 0 ; c < OPL->max_ch ; c++ ) |
| 1183 |
{
|
| 1184 |
OPL_CH *CH = &OPL->P_CH[c]; |
| 1185 |
/* OPL->P_CH[c].PAN = OPN_CENTER; */
|
| 1186 |
for(s = 0 ; s < 2 ; s++ ) |
| 1187 |
{
|
| 1188 |
/* wave table */
|
| 1189 |
CH->SLOT[s].wavetable = &SIN_TABLE[0];
|
| 1190 |
/* CH->SLOT[s].evm = ENV_MOD_RR; */
|
| 1191 |
CH->SLOT[s].evc = EG_OFF; |
| 1192 |
CH->SLOT[s].eve = EG_OFF+1;
|
| 1193 |
CH->SLOT[s].evs = 0;
|
| 1194 |
} |
| 1195 |
} |
| 1196 |
#if BUILD_Y8950
|
| 1197 |
if(OPL->type&OPL_TYPE_ADPCM)
|
| 1198 |
{
|
| 1199 |
YM_DELTAT *DELTAT = OPL->deltat; |
| 1200 |
|
| 1201 |
DELTAT->freqbase = OPL->freqbase; |
| 1202 |
DELTAT->output_pointer = outd; |
| 1203 |
DELTAT->portshift = 5;
|
| 1204 |
DELTAT->output_range = DELTAT_MIXING_LEVEL<<TL_BITS; |
| 1205 |
YM_DELTAT_ADPCM_Reset(DELTAT,0);
|
| 1206 |
} |
| 1207 |
#endif
|
| 1208 |
} |
| 1209 |
|
| 1210 |
/* ---------- Create one of vietual YM3812 ---------- */
|
| 1211 |
/* 'rate' is sampling rate and 'bufsiz' is the size of the */
|
| 1212 |
FM_OPL *OPLCreate(int type, int clock, int rate) |
| 1213 |
{
|
| 1214 |
char *ptr;
|
| 1215 |
FM_OPL *OPL; |
| 1216 |
int state_size;
|
| 1217 |
int max_ch = 9; /* normaly 9 channels */ |
| 1218 |
|
| 1219 |
if( OPL_LockTable() ==-1) return NULL; |
| 1220 |
/* allocate OPL state space */
|
| 1221 |
state_size = sizeof(FM_OPL);
|
| 1222 |
state_size += sizeof(OPL_CH)*max_ch;
|
| 1223 |
#if BUILD_Y8950
|
| 1224 |
if(type&OPL_TYPE_ADPCM) state_size+= sizeof(YM_DELTAT); |
| 1225 |
#endif
|
| 1226 |
/* allocate memory block */
|
| 1227 |
ptr = malloc(state_size); |
| 1228 |
if(ptr==NULL) return NULL; |
| 1229 |
/* clear */
|
| 1230 |
memset(ptr,0,state_size);
|
| 1231 |
OPL = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL);
|
| 1232 |
OPL->P_CH = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch;
|
| 1233 |
#if BUILD_Y8950
|
| 1234 |
if(type&OPL_TYPE_ADPCM) OPL->deltat = (YM_DELTAT *)ptr; ptr+=sizeof(YM_DELTAT); |
| 1235 |
#endif
|
| 1236 |
/* set channel state pointer */
|
| 1237 |
OPL->type = type; |
| 1238 |
OPL->clock = clock; |
| 1239 |
OPL->rate = rate; |
| 1240 |
OPL->max_ch = max_ch; |
| 1241 |
/* init grobal tables */
|
| 1242 |
OPL_initalize(OPL); |
| 1243 |
/* reset chip */
|
| 1244 |
OPLResetChip(OPL); |
| 1245 |
#ifdef OPL_OUTPUT_LOG
|
| 1246 |
if(!opl_dbg_fp)
|
| 1247 |
{
|
| 1248 |
opl_dbg_fp = fopen("opllog.opl","wb"); |
| 1249 |
opl_dbg_maxchip = 0;
|
| 1250 |
} |
| 1251 |
if(opl_dbg_fp)
|
| 1252 |
{
|
| 1253 |
opl_dbg_opl[opl_dbg_maxchip] = OPL; |
| 1254 |
fprintf(opl_dbg_fp,"%c%c%c%c%c%c",0x00+opl_dbg_maxchip, |
| 1255 |
type, |
| 1256 |
clock&0xff,
|
| 1257 |
(clock/0x100)&0xff, |
| 1258 |
(clock/0x10000)&0xff, |
| 1259 |
(clock/0x1000000)&0xff); |
| 1260 |
opl_dbg_maxchip++; |
| 1261 |
} |
| 1262 |
#endif
|
| 1263 |
return OPL;
|
| 1264 |
} |
| 1265 |
|
| 1266 |
/* ---------- Destroy one of vietual YM3812 ---------- */
|
| 1267 |
void OPLDestroy(FM_OPL *OPL)
|
| 1268 |
{
|
| 1269 |
#ifdef OPL_OUTPUT_LOG
|
| 1270 |
if(opl_dbg_fp)
|
| 1271 |
{
|
| 1272 |
fclose(opl_dbg_fp); |
| 1273 |
opl_dbg_fp = NULL;
|
| 1274 |
} |
| 1275 |
#endif
|
| 1276 |
OPL_UnLockTable(); |
| 1277 |
free(OPL); |
| 1278 |
} |
| 1279 |
|
| 1280 |
/* ---------- Option handlers ---------- */
|
| 1281 |
|
| 1282 |
void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset) |
| 1283 |
{
|
| 1284 |
OPL->TimerHandler = TimerHandler; |
| 1285 |
OPL->TimerParam = channelOffset; |
| 1286 |
} |
| 1287 |
void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param) |
| 1288 |
{
|
| 1289 |
OPL->IRQHandler = IRQHandler; |
| 1290 |
OPL->IRQParam = param; |
| 1291 |
} |
| 1292 |
void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param) |
| 1293 |
{
|
| 1294 |
OPL->UpdateHandler = UpdateHandler; |
| 1295 |
OPL->UpdateParam = param; |
| 1296 |
} |
| 1297 |
#if BUILD_Y8950
|
| 1298 |
void OPLSetPortHandler(FM_OPL *OPL,OPL_PORTHANDLER_W PortHandler_w,OPL_PORTHANDLER_R PortHandler_r,int param) |
| 1299 |
{
|
| 1300 |
OPL->porthandler_w = PortHandler_w; |
| 1301 |
OPL->porthandler_r = PortHandler_r; |
| 1302 |
OPL->port_param = param; |
| 1303 |
} |
| 1304 |
|
| 1305 |
void OPLSetKeyboardHandler(FM_OPL *OPL,OPL_PORTHANDLER_W KeyboardHandler_w,OPL_PORTHANDLER_R KeyboardHandler_r,int param) |
| 1306 |
{
|
| 1307 |
OPL->keyboardhandler_w = KeyboardHandler_w; |
| 1308 |
OPL->keyboardhandler_r = KeyboardHandler_r; |
| 1309 |
OPL->keyboard_param = param; |
| 1310 |
} |
| 1311 |
#endif
|
| 1312 |
/* ---------- YM3812 I/O interface ---------- */
|
| 1313 |
int OPLWrite(FM_OPL *OPL,int a,int v) |
| 1314 |
{
|
| 1315 |
if( !(a&1) ) |
| 1316 |
{ /* address port */
|
| 1317 |
OPL->address = v & 0xff;
|
| 1318 |
} |
| 1319 |
else
|
| 1320 |
{ /* data port */
|
| 1321 |
if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); |
| 1322 |
#ifdef OPL_OUTPUT_LOG
|
| 1323 |
if(opl_dbg_fp)
|
| 1324 |
{
|
| 1325 |
for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) |
| 1326 |
if( opl_dbg_opl[opl_dbg_chip] == OPL) break; |
| 1327 |
fprintf(opl_dbg_fp,"%c%c%c",0x10+opl_dbg_chip,OPL->address,v); |
| 1328 |
} |
| 1329 |
#endif
|
| 1330 |
OPLWriteReg(OPL,OPL->address,v); |
| 1331 |
} |
| 1332 |
return OPL->status>>7; |
| 1333 |
} |
| 1334 |
|
| 1335 |
unsigned char OPLRead(FM_OPL *OPL,int a) |
| 1336 |
{
|
| 1337 |
if( !(a&1) ) |
| 1338 |
{ /* status port */
|
| 1339 |
return OPL->status & (OPL->statusmask|0x80); |
| 1340 |
} |
| 1341 |
/* data port */
|
| 1342 |
switch(OPL->address)
|
| 1343 |
{
|
| 1344 |
case 0x05: /* KeyBoard IN */ |
| 1345 |
if(OPL->type&OPL_TYPE_KEYBOARD)
|
| 1346 |
{
|
| 1347 |
if(OPL->keyboardhandler_r)
|
| 1348 |
return OPL->keyboardhandler_r(OPL->keyboard_param);
|
| 1349 |
else {
|
| 1350 |
LOG(LOG_WAR,("OPL:read unmapped KEYBOARD port\n"));
|
| 1351 |
} |
| 1352 |
} |
| 1353 |
return 0; |
| 1354 |
#if 0
|
| 1355 |
case 0x0f: /* ADPCM-DATA */
|
| 1356 |
return 0;
|
| 1357 |
#endif
|
| 1358 |
case 0x19: /* I/O DATA */ |
| 1359 |
if(OPL->type&OPL_TYPE_IO)
|
| 1360 |
{
|
| 1361 |
if(OPL->porthandler_r)
|
| 1362 |
return OPL->porthandler_r(OPL->port_param);
|
| 1363 |
else {
|
| 1364 |
LOG(LOG_WAR,("OPL:read unmapped I/O port\n"));
|
| 1365 |
} |
| 1366 |
} |
| 1367 |
return 0; |
| 1368 |
case 0x1a: /* PCM-DATA */ |
| 1369 |
return 0; |
| 1370 |
} |
| 1371 |
return 0; |
| 1372 |
} |
| 1373 |
|
| 1374 |
int OPLTimerOver(FM_OPL *OPL,int c) |
| 1375 |
{
|
| 1376 |
if( c )
|
| 1377 |
{ /* Timer B */
|
| 1378 |
OPL_STATUS_SET(OPL,0x20);
|
| 1379 |
} |
| 1380 |
else
|
| 1381 |
{ /* Timer A */
|
| 1382 |
OPL_STATUS_SET(OPL,0x40);
|
| 1383 |
/* CSM mode key,TL controll */
|
| 1384 |
if( OPL->mode & 0x80 ) |
| 1385 |
{ /* CSM mode total level latch and auto key on */
|
| 1386 |
int ch;
|
| 1387 |
if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); |
| 1388 |
for(ch=0;ch<9;ch++) |
| 1389 |
CSMKeyControll( &OPL->P_CH[ch] ); |
| 1390 |
} |
| 1391 |
} |
| 1392 |
/* reload timer */
|
| 1393 |
if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+c,(double)OPL->T[c]*OPL->TimerBase); |
| 1394 |
return OPL->status>>7; |
| 1395 |
} |