aboutsummaryrefslogtreecommitdiffstats
path: root/hw/audio/fmopl.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/audio/fmopl.c')
-rw-r--r--hw/audio/fmopl.c1211
1 files changed, 1211 insertions, 0 deletions
diff --git a/hw/audio/fmopl.c b/hw/audio/fmopl.c
new file mode 100644
index 000000000..8a71a569f
--- /dev/null
+++ b/hw/audio/fmopl.c
@@ -0,0 +1,1211 @@
+/*
+**
+** File: fmopl.c -- software implementation of FM sound generator
+**
+** Copyright (C) 1999,2000 Tatsuyuki Satoh , MultiArcadeMachineEmurator development
+**
+** Version 0.37a
+**
+*/
+
+/*
+ preliminary :
+ Problem :
+ note:
+*/
+
+/* This version of fmopl.c is a fork of the MAME one, relicensed under the LGPL.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include <math.h>
+//#include "driver.h" /* use M.A.M.E. */
+#include "fmopl.h"
+#ifndef PI
+#define PI 3.14159265358979323846
+#endif
+
+/* -------------------- for debug --------------------- */
+/* #define OPL_OUTPUT_LOG */
+#ifdef OPL_OUTPUT_LOG
+static FILE *opl_dbg_fp = NULL;
+static FM_OPL *opl_dbg_opl[16];
+static int opl_dbg_maxchip,opl_dbg_chip;
+#endif
+
+/* -------------------- preliminary define section --------------------- */
+/* attack/decay rate time rate */
+#define OPL_ARRATE 141280 /* RATE 4 = 2826.24ms @ 3.6MHz */
+#define OPL_DRRATE 1956000 /* RATE 4 = 39280.64ms @ 3.6MHz */
+
+#define DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */
+
+#define FREQ_BITS 24 /* frequency turn */
+
+/* counter bits = 20 , octerve 7 */
+#define FREQ_RATE (1<<(FREQ_BITS-20))
+#define TL_BITS (FREQ_BITS+2)
+
+/* final output shift , limit minimum and maximum */
+#define OPL_OUTSB (TL_BITS+3-16) /* OPL output final shift 16bit */
+#define OPL_MAXOUT (0x7fff<<OPL_OUTSB)
+#define OPL_MINOUT (-0x8000<<OPL_OUTSB)
+
+/* -------------------- quality selection --------------------- */
+
+/* sinwave entries */
+/* used static memory = SIN_ENT * 4 (byte) */
+#define SIN_ENT 2048
+
+/* output level entries (envelope,sinwave) */
+/* envelope counter lower bits */
+#define ENV_BITS 16
+/* envelope output entries */
+#define EG_ENT 4096
+/* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */
+/* used static memory = EG_ENT*4 (byte) */
+
+#define EG_OFF ((2*EG_ENT)<<ENV_BITS) /* OFF */
+#define EG_DED EG_OFF
+#define EG_DST (EG_ENT<<ENV_BITS) /* DECAY START */
+#define EG_AED EG_DST
+#define EG_AST 0 /* ATTACK START */
+
+#define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */
+
+/* LFO table entries */
+#define VIB_ENT 512
+#define VIB_SHIFT (32-9)
+#define AMS_ENT 512
+#define AMS_SHIFT (32-9)
+
+#define VIB_RATE 256
+
+/* -------------------- local defines , macros --------------------- */
+
+/* register number to channel number , slot offset */
+#define SLOT1 0
+#define SLOT2 1
+
+/* envelope phase */
+#define ENV_MOD_RR 0x00
+#define ENV_MOD_DR 0x01
+#define ENV_MOD_AR 0x02
+
+/* -------------------- tables --------------------- */
+static const int slot_array[32]=
+{
+ 0, 2, 4, 1, 3, 5,-1,-1,
+ 6, 8,10, 7, 9,11,-1,-1,
+ 12,14,16,13,15,17,-1,-1,
+ -1,-1,-1,-1,-1,-1,-1,-1
+};
+
+/* key scale level */
+/* table is 3dB/OCT , DV converts this in TL step at 6dB/OCT */
+#define DV (EG_STEP/2)
+static const uint32_t KSL_TABLE[8*16]=
+{
+ /* OCT 0 */
+ 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
+ 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
+ 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
+ 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
+ /* OCT 1 */
+ 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
+ 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
+ 0.000/DV, 0.750/DV, 1.125/DV, 1.500/DV,
+ 1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV,
+ /* OCT 2 */
+ 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
+ 0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV,
+ 3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV,
+ 4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV,
+ /* OCT 3 */
+ 0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV,
+ 3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV,
+ 6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV,
+ 7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV,
+ /* OCT 4 */
+ 0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV,
+ 6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV,
+ 9.000/DV, 9.750/DV,10.125/DV,10.500/DV,
+ 10.875/DV,11.250/DV,11.625/DV,12.000/DV,
+ /* OCT 5 */
+ 0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV,
+ 9.000/DV,10.125/DV,10.875/DV,11.625/DV,
+ 12.000/DV,12.750/DV,13.125/DV,13.500/DV,
+ 13.875/DV,14.250/DV,14.625/DV,15.000/DV,
+ /* OCT 6 */
+ 0.000/DV, 6.000/DV, 9.000/DV,10.875/DV,
+ 12.000/DV,13.125/DV,13.875/DV,14.625/DV,
+ 15.000/DV,15.750/DV,16.125/DV,16.500/DV,
+ 16.875/DV,17.250/DV,17.625/DV,18.000/DV,
+ /* OCT 7 */
+ 0.000/DV, 9.000/DV,12.000/DV,13.875/DV,
+ 15.000/DV,16.125/DV,16.875/DV,17.625/DV,
+ 18.000/DV,18.750/DV,19.125/DV,19.500/DV,
+ 19.875/DV,20.250/DV,20.625/DV,21.000/DV
+};
+#undef DV
+
+/* sustain lebel table (3db per step) */
+/* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/
+#define SC(db) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST
+static const int32_t SL_TABLE[16]={
+ SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7),
+ SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31)
+};
+#undef SC
+
+#define TL_MAX (EG_ENT*2) /* limit(tl + ksr + envelope) + sinwave */
+/* TotalLevel : 48 24 12 6 3 1.5 0.75 (dB) */
+/* TL_TABLE[ 0 to TL_MAX ] : plus section */
+/* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */
+static int32_t *TL_TABLE;
+
+/* pointers to TL_TABLE with sinwave output offset */
+static int32_t **SIN_TABLE;
+
+/* LFO table */
+static int32_t *AMS_TABLE;
+static int32_t *VIB_TABLE;
+
+/* envelope output curve table */
+/* attack + decay + OFF */
+static int32_t *ENV_CURVE;
+
+/* multiple table */
+#define ML 2
+static const uint32_t MUL_TABLE[16]= {
+/* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */
+ 0.50*ML, 1.00*ML, 2.00*ML, 3.00*ML, 4.00*ML, 5.00*ML, 6.00*ML, 7.00*ML,
+ 8.00*ML, 9.00*ML,10.00*ML,10.00*ML,12.00*ML,12.00*ML,15.00*ML,15.00*ML
+};
+#undef ML
+
+/* dummy attack / decay rate ( when rate == 0 ) */
+static int32_t RATE_0[16]=
+{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+
+/* -------------------- static state --------------------- */
+
+/* lock level of common table */
+static int num_lock = 0;
+
+/* work table */
+static void *cur_chip = NULL; /* current chip point */
+/* currenct chip state */
+/* static OPLSAMPLE *bufL,*bufR; */
+static OPL_CH *S_CH;
+static OPL_CH *E_CH;
+static OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2;
+
+static int32_t outd[1];
+static int32_t ams;
+static int32_t vib;
+static int32_t *ams_table;
+static int32_t *vib_table;
+static int32_t amsIncr;
+static int32_t vibIncr;
+static int32_t feedback2; /* connect for SLOT 2 */
+
+/* log output level */
+#define LOG_ERR 3 /* ERROR */
+#define LOG_WAR 2 /* WARNING */
+#define LOG_INF 1 /* INFORMATION */
+
+//#define LOG_LEVEL LOG_INF
+#define LOG_LEVEL LOG_ERR
+
+//#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x
+#define LOG(n,x)
+
+/* --------------------- subroutines --------------------- */
+
+static inline int Limit( int val, int max, int min ) {
+ if ( val > max )
+ val = max;
+ else if ( val < min )
+ val = min;
+
+ return val;
+}
+
+/* status set and IRQ handling */
+static inline void OPL_STATUS_SET(FM_OPL *OPL,int flag)
+{
+ /* set status flag */
+ OPL->status |= flag;
+ if(!(OPL->status & 0x80))
+ {
+ if(OPL->status & OPL->statusmask)
+ { /* IRQ on */
+ OPL->status |= 0x80;
+ }
+ }
+}
+
+/* status reset and IRQ handling */
+static inline void OPL_STATUS_RESET(FM_OPL *OPL,int flag)
+{
+ /* reset status flag */
+ OPL->status &=~flag;
+ if((OPL->status & 0x80))
+ {
+ if (!(OPL->status & OPL->statusmask) )
+ {
+ OPL->status &= 0x7f;
+ }
+ }
+}
+
+/* IRQ mask set */
+static inline void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag)
+{
+ OPL->statusmask = flag;
+ /* IRQ handling check */
+ OPL_STATUS_SET(OPL,0);
+ OPL_STATUS_RESET(OPL,0);
+}
+
+/* ----- key on ----- */
+static inline void OPL_KEYON(OPL_SLOT *SLOT)
+{
+ /* sin wave restart */
+ SLOT->Cnt = 0;
+ /* set attack */
+ SLOT->evm = ENV_MOD_AR;
+ SLOT->evs = SLOT->evsa;
+ SLOT->evc = EG_AST;
+ SLOT->eve = EG_AED;
+}
+/* ----- key off ----- */
+static inline void OPL_KEYOFF(OPL_SLOT *SLOT)
+{
+ if( SLOT->evm > ENV_MOD_RR)
+ {
+ /* set envelope counter from envleope output */
+ SLOT->evm = ENV_MOD_RR;
+ if( !(SLOT->evc&EG_DST) )
+ //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST;
+ SLOT->evc = EG_DST;
+ SLOT->eve = EG_DED;
+ SLOT->evs = SLOT->evsr;
+ }
+}
+
+/* ---------- calcrate Envelope Generator & Phase Generator ---------- */
+/* return : envelope output */
+static inline uint32_t OPL_CALC_SLOT( OPL_SLOT *SLOT )
+{
+ /* calcrate envelope generator */
+ if( (SLOT->evc+=SLOT->evs) >= SLOT->eve )
+ {
+ switch( SLOT->evm ){
+ case ENV_MOD_AR: /* ATTACK -> DECAY1 */
+ /* next DR */
+ SLOT->evm = ENV_MOD_DR;
+ SLOT->evc = EG_DST;
+ SLOT->eve = SLOT->SL;
+ SLOT->evs = SLOT->evsd;
+ break;
+ case ENV_MOD_DR: /* DECAY -> SL or RR */
+ SLOT->evc = SLOT->SL;
+ SLOT->eve = EG_DED;
+ if(SLOT->eg_typ)
+ {
+ SLOT->evs = 0;
+ }
+ else
+ {
+ SLOT->evm = ENV_MOD_RR;
+ SLOT->evs = SLOT->evsr;
+ }
+ break;
+ case ENV_MOD_RR: /* RR -> OFF */
+ SLOT->evc = EG_OFF;
+ SLOT->eve = EG_OFF+1;
+ SLOT->evs = 0;
+ break;
+ }
+ }
+ /* calcrate envelope */
+ return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0);
+}
+
+/* set algorithm connection */
+static void set_algorithm( OPL_CH *CH)
+{
+ int32_t *carrier = &outd[0];
+ CH->connect1 = CH->CON ? carrier : &feedback2;
+ CH->connect2 = carrier;
+}
+
+/* ---------- frequency counter for operater update ---------- */
+static inline void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT)
+{
+ int ksr;
+
+ /* frequency step counter */
+ SLOT->Incr = CH->fc * SLOT->mul;
+ ksr = CH->kcode >> SLOT->KSR;
+
+ if( SLOT->ksr != ksr )
+ {
+ SLOT->ksr = ksr;
+ /* attack , decay rate recalcration */
+ SLOT->evsa = SLOT->AR[ksr];
+ SLOT->evsd = SLOT->DR[ksr];
+ SLOT->evsr = SLOT->RR[ksr];
+ }
+ SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
+}
+
+/* set multi,am,vib,EG-TYP,KSR,mul */
+static inline void set_mul(FM_OPL *OPL,int slot,int v)
+{
+ OPL_CH *CH = &OPL->P_CH[slot/2];
+ OPL_SLOT *SLOT = &CH->SLOT[slot&1];
+
+ SLOT->mul = MUL_TABLE[v&0x0f];
+ SLOT->KSR = (v&0x10) ? 0 : 2;
+ SLOT->eg_typ = (v&0x20)>>5;
+ SLOT->vib = (v&0x40);
+ SLOT->ams = (v&0x80);
+ CALC_FCSLOT(CH,SLOT);
+}
+
+/* set ksl & tl */
+static inline void set_ksl_tl(FM_OPL *OPL,int slot,int v)
+{
+ OPL_CH *CH = &OPL->P_CH[slot/2];
+ OPL_SLOT *SLOT = &CH->SLOT[slot&1];
+ int ksl = v>>6; /* 0 / 1.5 / 3 / 6 db/OCT */
+
+ SLOT->ksl = ksl ? 3-ksl : 31;
+ SLOT->TL = (v&0x3f)*(0.75/EG_STEP); /* 0.75db step */
+
+ if( !(OPL->mode&0x80) )
+ { /* not CSM latch total level */
+ SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
+ }
+}
+
+/* set attack rate & decay rate */
+static inline void set_ar_dr(FM_OPL *OPL,int slot,int v)
+{
+ OPL_CH *CH = &OPL->P_CH[slot/2];
+ OPL_SLOT *SLOT = &CH->SLOT[slot&1];
+ int ar = v>>4;
+ int dr = v&0x0f;
+
+ SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0;
+ SLOT->evsa = SLOT->AR[SLOT->ksr];
+ if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa;
+
+ SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0;
+ SLOT->evsd = SLOT->DR[SLOT->ksr];
+ if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd;
+}
+
+/* set sustain level & release rate */
+static inline void set_sl_rr(FM_OPL *OPL,int slot,int v)
+{
+ OPL_CH *CH = &OPL->P_CH[slot/2];
+ OPL_SLOT *SLOT = &CH->SLOT[slot&1];
+ int sl = v>>4;
+ int rr = v & 0x0f;
+
+ SLOT->SL = SL_TABLE[sl];
+ if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL;
+ SLOT->RR = &OPL->DR_TABLE[rr<<2];
+ SLOT->evsr = SLOT->RR[SLOT->ksr];
+ if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr;
+}
+
+/* operator output calcrator */
+#define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env]
+/* ---------- calcrate one of channel ---------- */
+static inline void OPL_CALC_CH( OPL_CH *CH )
+{
+ uint32_t env_out;
+ OPL_SLOT *SLOT;
+
+ feedback2 = 0;
+ /* SLOT 1 */
+ SLOT = &CH->SLOT[SLOT1];
+ env_out=OPL_CALC_SLOT(SLOT);
+ if( env_out < EG_ENT-1 )
+ {
+ /* PG */
+ if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
+ else SLOT->Cnt += SLOT->Incr;
+ /* connectoion */
+ if(CH->FB)
+ {
+ int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB;
+ CH->op1_out[1] = CH->op1_out[0];
+ *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1);
+ }
+ else
+ {
+ *CH->connect1 += OP_OUT(SLOT,env_out,0);
+ }
+ }else
+ {
+ CH->op1_out[1] = CH->op1_out[0];
+ CH->op1_out[0] = 0;
+ }
+ /* SLOT 2 */
+ SLOT = &CH->SLOT[SLOT2];
+ env_out=OPL_CALC_SLOT(SLOT);
+ if( env_out < EG_ENT-1 )
+ {
+ /* PG */
+ if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
+ else SLOT->Cnt += SLOT->Incr;
+ /* connectoion */
+ outd[0] += OP_OUT(SLOT,env_out, feedback2);
+ }
+}
+
+/* ---------- calcrate rhythm block ---------- */
+#define WHITE_NOISE_db 6.0
+static inline void OPL_CALC_RH( OPL_CH *CH )
+{
+ uint32_t env_tam,env_sd,env_top,env_hh;
+ int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP);
+ int32_t tone8;
+
+ OPL_SLOT *SLOT;
+ int env_out;
+
+ /* BD : same as FM serial mode and output level is large */
+ feedback2 = 0;
+ /* SLOT 1 */
+ SLOT = &CH[6].SLOT[SLOT1];
+ env_out=OPL_CALC_SLOT(SLOT);
+ if( env_out < EG_ENT-1 )
+ {
+ /* PG */
+ if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
+ else SLOT->Cnt += SLOT->Incr;
+ /* connectoion */
+ if(CH[6].FB)
+ {
+ int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB;
+ CH[6].op1_out[1] = CH[6].op1_out[0];
+ feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1);
+ }
+ else
+ {
+ feedback2 = OP_OUT(SLOT,env_out,0);
+ }
+ }else
+ {
+ feedback2 = 0;
+ CH[6].op1_out[1] = CH[6].op1_out[0];
+ CH[6].op1_out[0] = 0;
+ }
+ /* SLOT 2 */
+ SLOT = &CH[6].SLOT[SLOT2];
+ env_out=OPL_CALC_SLOT(SLOT);
+ if( env_out < EG_ENT-1 )
+ {
+ /* PG */
+ if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
+ else SLOT->Cnt += SLOT->Incr;
+ /* connectoion */
+ outd[0] += OP_OUT(SLOT,env_out, feedback2)*2;
+ }
+
+ // SD (17) = mul14[fnum7] + white noise
+ // TAM (15) = mul15[fnum8]
+ // TOP (18) = fnum6(mul18[fnum8]+whitenoise)
+ // HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise
+ env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise;
+ env_tam=OPL_CALC_SLOT(SLOT8_1);
+ env_top=OPL_CALC_SLOT(SLOT8_2);
+ env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise;
+
+ /* PG */
+ if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE);
+ else SLOT7_1->Cnt += 2*SLOT7_1->Incr;
+ if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE);
+ else SLOT7_2->Cnt += (CH[7].fc*8);
+ if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE);
+ else SLOT8_1->Cnt += SLOT8_1->Incr;
+ if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE);
+ else SLOT8_2->Cnt += (CH[8].fc*48);
+
+ tone8 = OP_OUT(SLOT8_2,whitenoise,0 );
+
+ /* SD */
+ if( env_sd < EG_ENT-1 )
+ outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8;
+ /* TAM */
+ if( env_tam < EG_ENT-1 )
+ outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2;
+ /* TOP-CY */
+ if( env_top < EG_ENT-1 )
+ outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2;
+ /* HH */
+ if( env_hh < EG_ENT-1 )
+ outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2;
+}
+
+/* ----------- initialize time tabls ----------- */
+static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE )
+{
+ int i;
+ double rate;
+
+ /* make attack rate & decay rate tables */
+ for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0;
+ for (i = 4;i <= 60;i++){
+ rate = OPL->freqbase; /* frequency rate */
+ if( i < 60 ) rate *= 1.0+(i&3)*0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */
+ rate *= 1<<((i>>2)-1); /* b2-5 : shift bit */
+ rate *= (double)(EG_ENT<<ENV_BITS);
+ OPL->AR_TABLE[i] = rate / ARRATE;
+ OPL->DR_TABLE[i] = rate / DRRATE;
+ }
+ for (i = 60; i < ARRAY_SIZE(OPL->AR_TABLE); i++)
+ {
+ OPL->AR_TABLE[i] = EG_AED-1;
+ OPL->DR_TABLE[i] = OPL->DR_TABLE[60];
+ }
+#if 0
+ for (i = 0;i < 64 ;i++){ /* make for overflow area */
+ LOG(LOG_WAR, ("rate %2d , ar %f ms , dr %f ms\n", i,
+ ((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate),
+ ((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) ));
+ }
+#endif
+}
+
+/* ---------- generic table initialize ---------- */
+static int OPLOpenTable( void )
+{
+ int s,t;
+ double rate;
+ int i,j;
+ double pom;
+
+ /* allocate dynamic tables */
+ if( (TL_TABLE = malloc(TL_MAX*2*sizeof(int32_t))) == NULL)
+ return 0;
+ if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(int32_t *))) == NULL)
+ {
+ free(TL_TABLE);
+ return 0;
+ }
+ if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(int32_t))) == NULL)
+ {
+ free(TL_TABLE);
+ free(SIN_TABLE);
+ return 0;
+ }
+ if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(int32_t))) == NULL)
+ {
+ free(TL_TABLE);
+ free(SIN_TABLE);
+ free(AMS_TABLE);
+ return 0;
+ }
+ ENV_CURVE = g_new(int32_t, 2 * EG_ENT + 1);
+ /* make total level table */
+ for (t = 0;t < EG_ENT-1 ;t++){
+ rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20); /* dB -> voltage */
+ TL_TABLE[ t] = (int)rate;
+ TL_TABLE[TL_MAX+t] = -TL_TABLE[t];
+/* LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/
+ }
+ /* fill volume off area */
+ for ( t = EG_ENT-1; t < TL_MAX ;t++){
+ TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0;
+ }
+
+ /* make sinwave table (total level offet) */
+ /* degree 0 = degree 180 = off */
+ SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2] = &TL_TABLE[EG_ENT-1];
+ for (s = 1;s <= SIN_ENT/4;s++){
+ pom = sin(2*PI*s/SIN_ENT); /* sin */
+ pom = 20*log10(1/pom); /* decibel */
+ j = pom / EG_STEP; /* TL_TABLE steps */
+
+ /* degree 0 - 90 , degree 180 - 90 : plus section */
+ SIN_TABLE[ s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j];
+ /* degree 180 - 270 , degree 360 - 270 : minus section */
+ SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT -s] = &TL_TABLE[TL_MAX+j];
+/* LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/
+ }
+ for (s = 0;s < SIN_ENT;s++)
+ {
+ SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT];
+ SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)];
+ SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s];
+ }
+
+ /* envelope counter -> envelope output table */
+ for (i=0; i<EG_ENT; i++)
+ {
+ /* ATTACK curve */
+ pom = pow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT;
+ /* if( pom >= EG_ENT ) pom = EG_ENT-1; */
+ ENV_CURVE[i] = (int)pom;
+ /* DECAY ,RELEASE curve */
+ ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i;
+ }
+ /* off */
+ ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1;
+ /* make LFO ams table */
+ for (i=0; i<AMS_ENT; i++)
+ {
+ pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */
+ AMS_TABLE[i] = (1.0/EG_STEP)*pom; /* 1dB */
+ AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom; /* 4.8dB */
+ }
+ /* make LFO vibrate table */
+ for (i=0; i<VIB_ENT; i++)
+ {
+ /* 100cent = 1seminote = 6% ?? */
+ pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */
+ VIB_TABLE[i] = VIB_RATE + (pom*0.07); /* +- 7cent */
+ VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14); /* +-14cent */
+ /* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */
+ }
+ return 1;
+}
+
+
+static void OPLCloseTable( void )
+{
+ g_free(ENV_CURVE);
+ free(TL_TABLE);
+ free(SIN_TABLE);
+ free(AMS_TABLE);
+ free(VIB_TABLE);
+}
+
+/* CSM Key Control */
+static inline void CSMKeyControll(OPL_CH *CH)
+{
+ OPL_SLOT *slot1 = &CH->SLOT[SLOT1];
+ OPL_SLOT *slot2 = &CH->SLOT[SLOT2];
+ /* all key off */
+ OPL_KEYOFF(slot1);
+ OPL_KEYOFF(slot2);
+ /* total level latch */
+ slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl);
+ slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl);
+ /* key on */
+ CH->op1_out[0] = CH->op1_out[1] = 0;
+ OPL_KEYON(slot1);
+ OPL_KEYON(slot2);
+}
+
+/* ---------- opl initialize ---------- */
+static void OPL_initialize(FM_OPL *OPL)
+{
+ int fn;
+
+ /* frequency base */
+ OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0;
+ /* Timer base time */
+ OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 );
+ /* make time tables */
+ init_timetables( OPL , OPL_ARRATE , OPL_DRRATE );
+ /* make fnumber -> increment counter table */
+ for( fn=0 ; fn < 1024 ; fn++ )
+ {
+ OPL->FN_TABLE[fn] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2;
+ }
+ /* LFO freq.table */
+ OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0;
+ OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0;
+}
+
+/* ---------- write a OPL registers ---------- */
+static void OPLWriteReg(FM_OPL *OPL, int r, int v)
+{
+ OPL_CH *CH;
+ int slot;
+ int block_fnum;
+
+ switch(r&0xe0)
+ {
+ case 0x00: /* 00-1f:control */
+ switch(r&0x1f)
+ {
+ case 0x01:
+ /* wave selector enable */
+ OPL->wavesel = v&0x20;
+ if(!OPL->wavesel)
+ {
+ /* preset compatible mode */
+ int c;
+ for(c=0;c<OPL->max_ch;c++)
+ {
+ OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0];
+ OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0];
+ }
+ }
+ return;
+ case 0x02: /* Timer 1 */
+ OPL->T[0] = (256-v)*4;
+ break;
+ case 0x03: /* Timer 2 */
+ OPL->T[1] = (256-v)*16;
+ return;
+ case 0x04: /* IRQ clear / mask and Timer enable */
+ if(v&0x80)
+ { /* IRQ flag clear */
+ OPL_STATUS_RESET(OPL,0x7f);
+ }
+ else
+ { /* set IRQ mask ,timer enable*/
+ uint8_t st1 = v&1;
+ uint8_t st2 = (v>>1)&1;
+ /* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */
+ OPL_STATUS_RESET(OPL,v&0x78);
+ OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01);
+ /* timer 2 */
+ if(OPL->st[1] != st2)
+ {
+ double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0;
+ OPL->st[1] = st2;
+ if (OPL->TimerHandler) {
+ (OPL->TimerHandler)(OPL->TimerParam, 1, interval);
+ }
+ }
+ /* timer 1 */
+ if(OPL->st[0] != st1)
+ {
+ double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0;
+ OPL->st[0] = st1;
+ if (OPL->TimerHandler) {
+ (OPL->TimerHandler)(OPL->TimerParam, 0, interval);
+ }
+ }
+ }
+ return;
+ }
+ break;
+ case 0x20: /* am,vib,ksr,eg type,mul */
+ slot = slot_array[r&0x1f];
+ if(slot == -1) return;
+ set_mul(OPL,slot,v);
+ return;
+ case 0x40:
+ slot = slot_array[r&0x1f];
+ if(slot == -1) return;
+ set_ksl_tl(OPL,slot,v);
+ return;
+ case 0x60:
+ slot = slot_array[r&0x1f];
+ if(slot == -1) return;
+ set_ar_dr(OPL,slot,v);
+ return;
+ case 0x80:
+ slot = slot_array[r&0x1f];
+ if(slot == -1) return;
+ set_sl_rr(OPL,slot,v);
+ return;
+ case 0xa0:
+ switch(r)
+ {
+ case 0xbd:
+ /* amsep,vibdep,r,bd,sd,tom,tc,hh */
+ {
+ uint8_t rkey = OPL->rhythm^v;
+ OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0];
+ OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0];
+ OPL->rhythm = v&0x3f;
+ if(OPL->rhythm&0x20)
+ {
+#if 0
+ usrintf_showmessage("OPL Rhythm mode select");
+#endif
+ /* BD key on/off */
+ if(rkey&0x10)
+ {
+ if(v&0x10)
+ {
+ OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0;
+ OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]);
+ OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]);
+ }
+ else
+ {
+ OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]);
+ OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]);
+ }
+ }
+ /* SD key on/off */
+ if(rkey&0x08)
+ {
+ if(v&0x08) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]);
+ else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]);
+ }/* TAM key on/off */
+ if(rkey&0x04)
+ {
+ if(v&0x04) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]);
+ else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]);
+ }
+ /* TOP-CY key on/off */
+ if(rkey&0x02)
+ {
+ if(v&0x02) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]);
+ else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]);
+ }
+ /* HH key on/off */
+ if(rkey&0x01)
+ {
+ if(v&0x01) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]);
+ else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]);
+ }
+ }
+ }
+ return;
+ }
+ /* keyon,block,fnum */
+ if( (r&0x0f) > 8) return;
+ CH = &OPL->P_CH[r&0x0f];
+ if(!(r&0x10))
+ { /* a0-a8 */
+ block_fnum = (CH->block_fnum&0x1f00) | v;
+ }
+ else
+ { /* b0-b8 */
+ int keyon = (v>>5)&1;
+ block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff);
+ if(CH->keyon != keyon)
+ {
+ if( (CH->keyon=keyon) )
+ {
+ CH->op1_out[0] = CH->op1_out[1] = 0;
+ OPL_KEYON(&CH->SLOT[SLOT1]);
+ OPL_KEYON(&CH->SLOT[SLOT2]);
+ }
+ else
+ {
+ OPL_KEYOFF(&CH->SLOT[SLOT1]);
+ OPL_KEYOFF(&CH->SLOT[SLOT2]);
+ }
+ }
+ }
+ /* update */
+ if(CH->block_fnum != block_fnum)
+ {
+ int blockRv = 7-(block_fnum>>10);
+ int fnum = block_fnum&0x3ff;
+ CH->block_fnum = block_fnum;
+
+ CH->ksl_base = KSL_TABLE[block_fnum>>6];
+ CH->fc = OPL->FN_TABLE[fnum]>>blockRv;
+ CH->kcode = CH->block_fnum>>9;
+ if( (OPL->mode&0x40) && CH->block_fnum&0x100) CH->kcode |=1;
+ CALC_FCSLOT(CH,&CH->SLOT[SLOT1]);
+ CALC_FCSLOT(CH,&CH->SLOT[SLOT2]);
+ }
+ return;
+ case 0xc0:
+ /* FB,C */
+ if( (r&0x0f) > 8) return;
+ CH = &OPL->P_CH[r&0x0f];
+ {
+ int feedback = (v>>1)&7;
+ CH->FB = feedback ? (8+1) - feedback : 0;
+ CH->CON = v&1;
+ set_algorithm(CH);
+ }
+ return;
+ case 0xe0: /* wave type */
+ slot = slot_array[r&0x1f];
+ if(slot == -1) return;
+ CH = &OPL->P_CH[slot/2];
+ if(OPL->wavesel)
+ {
+ /* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */
+ CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT];
+ }
+ return;
+ }
+}
+
+/* lock/unlock for common table */
+static int OPL_LockTable(void)
+{
+ num_lock++;
+ if(num_lock>1) return 0;
+ /* first time */
+ cur_chip = NULL;
+ /* allocate total level table (128kb space) */
+ if( !OPLOpenTable() )
+ {
+ num_lock--;
+ return -1;
+ }
+ return 0;
+}
+
+static void OPL_UnLockTable(void)
+{
+ if(num_lock) num_lock--;
+ if(num_lock) return;
+ /* last time */
+ cur_chip = NULL;
+ OPLCloseTable();
+}
+
+/*******************************************************************************/
+/* YM3812 local section */
+/*******************************************************************************/
+
+/* ---------- update one of chip ----------- */
+void YM3812UpdateOne(FM_OPL *OPL, int16_t *buffer, int length)
+{
+ int i;
+ int data;
+ int16_t *buf = buffer;
+ uint32_t amsCnt = OPL->amsCnt;
+ uint32_t vibCnt = OPL->vibCnt;
+ uint8_t rhythm = OPL->rhythm&0x20;
+ OPL_CH *CH,*R_CH;
+
+ if( (void *)OPL != cur_chip ){
+ cur_chip = (void *)OPL;
+ /* channel pointers */
+ S_CH = OPL->P_CH;
+ E_CH = &S_CH[9];
+ /* rhythm slot */
+ SLOT7_1 = &S_CH[7].SLOT[SLOT1];
+ SLOT7_2 = &S_CH[7].SLOT[SLOT2];
+ SLOT8_1 = &S_CH[8].SLOT[SLOT1];
+ SLOT8_2 = &S_CH[8].SLOT[SLOT2];
+ /* LFO state */
+ amsIncr = OPL->amsIncr;
+ vibIncr = OPL->vibIncr;
+ ams_table = OPL->ams_table;
+ vib_table = OPL->vib_table;
+ }
+ R_CH = rhythm ? &S_CH[6] : E_CH;
+ for( i=0; i < length ; i++ )
+ {
+ /* channel A channel B channel C */
+ /* LFO */
+ ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT];
+ vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT];
+ outd[0] = 0;
+ /* FM part */
+ for(CH=S_CH ; CH < R_CH ; CH++)
+ OPL_CALC_CH(CH);
+ /* Rythn part */
+ if(rhythm)
+ OPL_CALC_RH(S_CH);
+ /* limit check */
+ data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT );
+ /* store to sound buffer */
+ buf[i] = data >> OPL_OUTSB;
+ }
+
+ OPL->amsCnt = amsCnt;
+ OPL->vibCnt = vibCnt;
+#ifdef OPL_OUTPUT_LOG
+ if(opl_dbg_fp)
+ {
+ for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++)
+ if( opl_dbg_opl[opl_dbg_chip] == OPL) break;
+ fprintf(opl_dbg_fp,"%c%c%c",0x20+opl_dbg_chip,length&0xff,length/256);
+ }
+#endif
+}
+
+/* ---------- reset one of chip ---------- */
+static void OPLResetChip(FM_OPL *OPL)
+{
+ int c,s;
+ int i;
+
+ /* reset chip */
+ OPL->mode = 0; /* normal mode */
+ OPL_STATUS_RESET(OPL,0x7f);
+ /* reset with register write */
+ OPLWriteReg(OPL,0x01,0); /* wabesel disable */
+ OPLWriteReg(OPL,0x02,0); /* Timer1 */
+ OPLWriteReg(OPL,0x03,0); /* Timer2 */
+ OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */
+ for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0);
+ /* reset operator parameter */
+ for( c = 0 ; c < OPL->max_ch ; c++ )
+ {
+ OPL_CH *CH = &OPL->P_CH[c];
+ /* OPL->P_CH[c].PAN = OPN_CENTER; */
+ for(s = 0 ; s < 2 ; s++ )
+ {
+ /* wave table */
+ CH->SLOT[s].wavetable = &SIN_TABLE[0];
+ /* CH->SLOT[s].evm = ENV_MOD_RR; */
+ CH->SLOT[s].evc = EG_OFF;
+ CH->SLOT[s].eve = EG_OFF+1;
+ CH->SLOT[s].evs = 0;
+ }
+ }
+}
+
+/* ---------- Create one of virtual YM3812 ---------- */
+/* 'rate' is sampling rate and 'bufsiz' is the size of the */
+FM_OPL *OPLCreate(int clock, int rate)
+{
+ char *ptr;
+ FM_OPL *OPL;
+ int state_size;
+ int max_ch = 9; /* normaly 9 channels */
+
+ if( OPL_LockTable() ==-1) return NULL;
+ /* allocate OPL state space */
+ state_size = sizeof(FM_OPL);
+ state_size += sizeof(OPL_CH)*max_ch;
+ /* allocate memory block */
+ ptr = malloc(state_size);
+ if(ptr==NULL) return NULL;
+ /* clear */
+ memset(ptr,0,state_size);
+ OPL = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL);
+ OPL->P_CH = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch;
+ /* set channel state pointer */
+ OPL->clock = clock;
+ OPL->rate = rate;
+ OPL->max_ch = max_ch;
+ /* init grobal tables */
+ OPL_initialize(OPL);
+ /* reset chip */
+ OPLResetChip(OPL);
+#ifdef OPL_OUTPUT_LOG
+ if(!opl_dbg_fp)
+ {
+ opl_dbg_fp = fopen("opllog.opl","wb");
+ opl_dbg_maxchip = 0;
+ }
+ if(opl_dbg_fp)
+ {
+ opl_dbg_opl[opl_dbg_maxchip] = OPL;
+ fprintf(opl_dbg_fp,"%c%c%c%c%c%c",0x00+opl_dbg_maxchip,
+ type,
+ clock&0xff,
+ (clock/0x100)&0xff,
+ (clock/0x10000)&0xff,
+ (clock/0x1000000)&0xff);
+ opl_dbg_maxchip++;
+ }
+#endif
+ return OPL;
+}
+
+/* ---------- Destroy one of virtual YM3812 ---------- */
+void OPLDestroy(FM_OPL *OPL)
+{
+#ifdef OPL_OUTPUT_LOG
+ if(opl_dbg_fp)
+ {
+ fclose(opl_dbg_fp);
+ opl_dbg_fp = NULL;
+ }
+#endif
+ OPL_UnLockTable();
+ free(OPL);
+}
+
+/* ---------- Option handlers ---------- */
+
+void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler,
+ void *param)
+{
+ OPL->TimerHandler = TimerHandler;
+ OPL->TimerParam = param;
+}
+
+/* ---------- YM3812 I/O interface ---------- */
+int OPLWrite(FM_OPL *OPL,int a,int v)
+{
+ if( !(a&1) )
+ { /* address port */
+ OPL->address = v & 0xff;
+ }
+ else
+ { /* data port */
+#ifdef OPL_OUTPUT_LOG
+ if(opl_dbg_fp)
+ {
+ for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++)
+ if( opl_dbg_opl[opl_dbg_chip] == OPL) break;
+ fprintf(opl_dbg_fp,"%c%c%c",0x10+opl_dbg_chip,OPL->address,v);
+ }
+#endif
+ OPLWriteReg(OPL,OPL->address,v);
+ }
+ return OPL->status>>7;
+}
+
+unsigned char OPLRead(FM_OPL *OPL,int a)
+{
+ if( !(a&1) )
+ { /* status port */
+ return OPL->status & (OPL->statusmask|0x80);
+ }
+ /* data port */
+ switch(OPL->address)
+ {
+ case 0x05: /* KeyBoard IN */
+ return 0;
+#if 0
+ case 0x0f: /* ADPCM-DATA */
+ return 0;
+#endif
+ case 0x19: /* I/O DATA */
+ return 0;
+ case 0x1a: /* PCM-DATA */
+ return 0;
+ }
+ return 0;
+}
+
+int OPLTimerOver(FM_OPL *OPL,int c)
+{
+ if( c )
+ { /* Timer B */
+ OPL_STATUS_SET(OPL,0x20);
+ }
+ else
+ { /* Timer A */
+ OPL_STATUS_SET(OPL,0x40);
+ /* CSM mode key,TL control */
+ if( OPL->mode & 0x80 )
+ { /* CSM mode total level latch and auto key on */
+ int ch;
+ for(ch=0;ch<9;ch++)
+ CSMKeyControll( &OPL->P_CH[ch] );
+ }
+ }
+ /* reload timer */
+ if (OPL->TimerHandler) {
+ (OPL->TimerHandler)(OPL->TimerParam, c,
+ (double)OPL->T[c] * OPL->TimerBase);
+ }
+ return OPL->status>>7;
+}