hw/fmopl.c

   1 /*
   2 **
   3 ** File: fmopl.c -- software implementation of FM sound generator
   4 **
   5 ** Copyright (C) 1999,2000 Tatsuyuki Satoh , MultiArcadeMachineEmurator development
   6 **
   7 ** Version 0.37a
   8 **
   9 */
  10
  11 /*
  12         preliminary :
  13         Problem :
  14         note:
  15 */
  16
  17 /* This version of fmopl.c is a fork of the MAME one, relicensed under the LGPL.
  18  *
  19  * This library is free software; you can redistribute it and/or
  20  * modify it under the terms of the GNU Lesser General Public
  21  * License as published by the Free Software Foundation; either
  22  * version 2.1 of the License, or (at your option) any later version.
  23  *
  24  * This library is distributed in the hope that it will be useful,
  25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  27  * Lesser General Public License for more details.
  28  *
  29  * You should have received a copy of the GNU Lesser General Public
  30  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  31  */
  32
  33 #define INLINE          static inline
  34 #define HAS_YM3812      1
  35
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <stdarg.h>
  40 #include <math.h>
  41 //#include "driver.h"           /* use M.A.M.E. */
  42 #include "fmopl.h"
  43
  44 #ifndef PI
  45 #define PI 3.14159265358979323846
  46 #endif
  47
  48 #ifndef ARRAY_SIZE
  49 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  50 #endif
  51
  52 /* -------------------- for debug --------------------- */
  53 /* #define OPL_OUTPUT_LOG */
  54 #ifdef OPL_OUTPUT_LOG
  55 static FILE *opl_dbg_fp = NULL;
  56 static FM_OPL *opl_dbg_opl[16];
  57 static int opl_dbg_maxchip,opl_dbg_chip;
  58 #endif
  59
  60 /* -------------------- preliminary define section --------------------- */
  61 /* attack/decay rate time rate */
  62 #define OPL_ARRATE     141280  /* RATE 4 =  2826.24ms @ 3.6MHz */
  63 #define OPL_DRRATE    1956000  /* RATE 4 = 39280.64ms @ 3.6MHz */
  64
  65 #define DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */
  66
  67 #define FREQ_BITS 24                    /* frequency turn          */
  68
  69 /* counter bits = 20 , octerve 7 */
  70 #define FREQ_RATE   (1<<(FREQ_BITS-20))
  71 #define TL_BITS    (FREQ_BITS+2)
  72
  73 /* final output shift , limit minimum and maximum */
  74 #define OPL_OUTSB   (TL_BITS+3-16)              /* OPL output final shift 16bit */
  75 #define OPL_MAXOUT (0x7fff<<OPL_OUTSB)
  76 #define OPL_MINOUT (-0x8000<<OPL_OUTSB)
  77
  78 /* -------------------- quality selection --------------------- */
  79
  80 /* sinwave entries */
  81 /* used static memory = SIN_ENT * 4 (byte) */
  82 #define SIN_ENT 2048
  83
  84 /* output level entries (envelope,sinwave) */
  85 /* envelope counter lower bits */
  86 #define ENV_BITS 16
  87 /* envelope output entries */
  88 #define EG_ENT   4096
  89 /* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */
  90 /* used static  memory = EG_ENT*4 (byte)                     */
  91
  92 #define EG_OFF   ((2*EG_ENT)<<ENV_BITS)  /* OFF          */
  93 #define EG_DED   EG_OFF
  94 #define EG_DST   (EG_ENT<<ENV_BITS)      /* DECAY  START */
  95 #define EG_AED   EG_DST
  96 #define EG_AST   0                       /* ATTACK START */
  97
  98 #define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step  */
  99
 100 /* LFO table entries */
 101 #define VIB_ENT 512
 102 #define VIB_SHIFT (32-9)
 103 #define AMS_ENT 512
 104 #define AMS_SHIFT (32-9)
 105
 106 #define VIB_RATE 256
 107
 108 /* -------------------- local defines , macros --------------------- */
 109
 110 /* register number to channel number , slot offset */
 111 #define SLOT1 0
 112 #define SLOT2 1
 113
 114 /* envelope phase */
 115 #define ENV_MOD_RR  0x00
 116 #define ENV_MOD_DR  0x01
 117 #define ENV_MOD_AR  0x02
 118
 119 /* -------------------- tables --------------------- */
 120 static const int slot_array[32]=
 121 {
 122          0, 2, 4, 1, 3, 5,-1,-1,
 123          6, 8,10, 7, 9,11,-1,-1,
 124         12,14,16,13,15,17,-1,-1,
 125         -1,-1,-1,-1,-1,-1,-1,-1
 126 };
 127
 128 /* key scale level */
 129 /* table is 3dB/OCT , DV converts this in TL step at 6dB/OCT */
 130 #define DV (EG_STEP/2)
 131 static const UINT32 KSL_TABLE[8*16]=
 132 {
 133         /* OCT 0 */
 134          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 135          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 136          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 137          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 138         /* OCT 1 */
 139          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 140          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 141          0.000/DV, 0.750/DV, 1.125/DV, 1.500/DV,
 142          1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV,
 143         /* OCT 2 */
 144          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 145          0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV,
 146          3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV,
 147          4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV,
 148         /* OCT 3 */
 149          0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV,
 150          3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV,
 151          6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV,
 152          7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV,
 153         /* OCT 4 */
 154          0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV,
 155          6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV,
 156          9.000/DV, 9.750/DV,10.125/DV,10.500/DV,
 157         10.875/DV,11.250/DV,11.625/DV,12.000/DV,
 158         /* OCT 5 */
 159          0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV,
 160          9.000/DV,10.125/DV,10.875/DV,11.625/DV,
 161         12.000/DV,12.750/DV,13.125/DV,13.500/DV,
 162         13.875/DV,14.250/DV,14.625/DV,15.000/DV,
 163         /* OCT 6 */
 164          0.000/DV, 6.000/DV, 9.000/DV,10.875/DV,
 165         12.000/DV,13.125/DV,13.875/DV,14.625/DV,
 166         15.000/DV,15.750/DV,16.125/DV,16.500/DV,
 167         16.875/DV,17.250/DV,17.625/DV,18.000/DV,
 168         /* OCT 7 */
 169          0.000/DV, 9.000/DV,12.000/DV,13.875/DV,
 170         15.000/DV,16.125/DV,16.875/DV,17.625/DV,
 171         18.000/DV,18.750/DV,19.125/DV,19.500/DV,
 172         19.875/DV,20.250/DV,20.625/DV,21.000/DV
 173 };
 174 #undef DV
 175
 176 /* sustain lebel table (3db per step) */
 177 /* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/
 178 #define SC(db) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST
 179 static const INT32 SL_TABLE[16]={
 180  SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7),
 181  SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31)
 182 };
 183 #undef SC
 184
 185 #define TL_MAX (EG_ENT*2) /* limit(tl + ksr + envelope) + sinwave */
 186 /* TotalLevel : 48 24 12  6  3 1.5 0.75 (dB) */
 187 /* TL_TABLE[ 0      to TL_MAX          ] : plus  section */
 188 /* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */
 189 static INT32 *TL_TABLE;
 190
 191 /* pointers to TL_TABLE with sinwave output offset */
 192 static INT32 **SIN_TABLE;
 193
 194 /* LFO table */
 195 static INT32 *AMS_TABLE;
 196 static INT32 *VIB_TABLE;
 197
 198 /* envelope output curve table */
 199 /* attack + decay + OFF */
 200 static INT32 ENV_CURVE[2*EG_ENT+1];
 201
 202 /* multiple table */
 203 #define ML 2
 204 static const UINT32 MUL_TABLE[16]= {
 205 /* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */
 206    0.50*ML, 1.00*ML, 2.00*ML, 3.00*ML, 4.00*ML, 5.00*ML, 6.00*ML, 7.00*ML,
 207    8.00*ML, 9.00*ML,10.00*ML,10.00*ML,12.00*ML,12.00*ML,15.00*ML,15.00*ML
 208 };
 209 #undef ML
 210
 211 /* dummy attack / decay rate ( when rate == 0 ) */
 212 static INT32 RATE_0[16]=
 213 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
 214
 215 /* -------------------- static state --------------------- */
 216
 217 /* lock level of common table */
 218 static int num_lock = 0;
 219
 220 /* work table */
 221 static void *cur_chip = NULL;   /* current chip point */
 222 /* currenct chip state */
 223 /* static OPLSAMPLE  *bufL,*bufR; */
 224 static OPL_CH *S_CH;
 225 static OPL_CH *E_CH;
 226 OPL_SLOT *SLOT7_1,*SLOT7_2,*SLOT8_1,*SLOT8_2;
 227
 228 static INT32 outd[1];
 229 static INT32 ams;
 230 static INT32 vib;
 231 INT32  *ams_table;
 232 INT32  *vib_table;
 233 static INT32 amsIncr;
 234 static INT32 vibIncr;
 235 static INT32 feedback2;         /* connect for SLOT 2 */
 236
 237 /* log output level */
 238 #define LOG_ERR  3      /* ERROR       */
 239 #define LOG_WAR  2      /* WARNING     */
 240 #define LOG_INF  1      /* INFORMATION */
 241
 242 //#define LOG_LEVEL LOG_INF
 243 #define LOG_LEVEL       LOG_ERR
 244
 245 //#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x
 246 #define LOG(n,x)
 247
 248 /* --------------------- subroutines  --------------------- */
 249
 250 INLINE int Limit( int val, int max, int min ) {
 251         if ( val > max )
 252                 val = max;
 253         else if ( val < min )
 254                 val = min;
 255
 256         return val;
 257 }
 258
 259 /* status set and IRQ handling */
 260 INLINE void OPL_STATUS_SET(FM_OPL *OPL,int flag)
 261 {
 262         /* set status flag */
 263         OPL->status |= flag;
 264         if(!(OPL->status & 0x80))
 265         {
 266                 if(OPL->status & OPL->statusmask)
 267                 {       /* IRQ on */
 268                         OPL->status |= 0x80;
 269                         /* callback user interrupt handler (IRQ is OFF to ON) */
 270                         if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,1);
 271                 }
 272         }
 273 }
 274
 275 /* status reset and IRQ handling */
 276 INLINE void OPL_STATUS_RESET(FM_OPL *OPL,int flag)
 277 {
 278         /* reset status flag */
 279         OPL->status &=~flag;
 280         if((OPL->status & 0x80))
 281         {
 282                 if (!(OPL->status & OPL->statusmask) )
 283                 {
 284                         OPL->status &= 0x7f;
 285                         /* callback user interrupt handler (IRQ is ON to OFF) */
 286                         if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,0);
 287                 }
 288         }
 289 }
 290
 291 /* IRQ mask set */
 292 INLINE void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag)
 293 {
 294         OPL->statusmask = flag;
 295         /* IRQ handling check */
 296         OPL_STATUS_SET(OPL,0);
 297         OPL_STATUS_RESET(OPL,0);
 298 }
 299
 300 /* ----- key on  ----- */
 301 INLINE void OPL_KEYON(OPL_SLOT *SLOT)
 302 {
 303         /* sin wave restart */
 304         SLOT->Cnt = 0;
 305         /* set attack */
 306         SLOT->evm = ENV_MOD_AR;
 307         SLOT->evs = SLOT->evsa;
 308         SLOT->evc = EG_AST;
 309         SLOT->eve = EG_AED;
 310 }
 311 /* ----- key off ----- */
 312 INLINE void OPL_KEYOFF(OPL_SLOT *SLOT)
 313 {
 314         if( SLOT->evm > ENV_MOD_RR)
 315         {
 316                 /* set envelope counter from envleope output */
 317                 SLOT->evm = ENV_MOD_RR;
 318                 if( !(SLOT->evc&EG_DST) )
 319                         //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST;
 320                         SLOT->evc = EG_DST;
 321                 SLOT->eve = EG_DED;
 322                 SLOT->evs = SLOT->evsr;
 323         }
 324 }
 325
 326 /* ---------- calcrate Envelope Generator & Phase Generator ---------- */
 327 /* return : envelope output */
 328 INLINE UINT32 OPL_CALC_SLOT( OPL_SLOT *SLOT )
 329 {
 330         /* calcrate envelope generator */
 331         if( (SLOT->evc+=SLOT->evs) >= SLOT->eve )
 332         {
 333                 switch( SLOT->evm ){
 334                 case ENV_MOD_AR: /* ATTACK -> DECAY1 */
 335                         /* next DR */
 336                         SLOT->evm = ENV_MOD_DR;
 337                         SLOT->evc = EG_DST;
 338                         SLOT->eve = SLOT->SL;
 339                         SLOT->evs = SLOT->evsd;
 340                         break;
 341                 case ENV_MOD_DR: /* DECAY -> SL or RR */
 342                         SLOT->evc = SLOT->SL;
 343                         SLOT->eve = EG_DED;
 344                         if(SLOT->eg_typ)
 345                         {
 346                                 SLOT->evs = 0;
 347                         }
 348                         else
 349                         {
 350                                 SLOT->evm = ENV_MOD_RR;
 351                                 SLOT->evs = SLOT->evsr;
 352                         }
 353                         break;
 354                 case ENV_MOD_RR: /* RR -> OFF */
 355                         SLOT->evc = EG_OFF;
 356                         SLOT->eve = EG_OFF+1;
 357                         SLOT->evs = 0;
 358                         break;
 359                 }
 360         }
 361         /* calcrate envelope */
 362         return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0);
 363 }
 364
 365 /* set algorythm connection */
 366 static void set_algorythm( OPL_CH *CH)
 367 {
 368         INT32 *carrier = &outd[0];
 369         CH->connect1 = CH->CON ? carrier : &feedback2;
 370         CH->connect2 = carrier;
 371 }
 372
 373 /* ---------- frequency counter for operater update ---------- */
 374 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];
 400         SLOT->KSR    = (v&0x10) ? 0 : 2;
 401         SLOT->eg_typ = (v&0x20)>>5;
 402         SLOT->vib    = (v&0x40);
 403         SLOT->ams    = (v&0x80);
 404         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
 414         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 }