qemu/hw/audio/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 HAS_YM3812      1
  34
  35 #include "qemu/osdep.h"
  36 #include <math.h>
  37 //#include "driver.h"           /* use M.A.M.E. */
  38 #include "fmopl.h"
  39
  40 #ifndef PI
  41 #define PI 3.14159265358979323846
  42 #endif
  43
  44 #ifndef ARRAY_SIZE
  45 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  46 #endif
  47
  48 /* -------------------- for debug --------------------- */
  49 /* #define OPL_OUTPUT_LOG */
  50 #ifdef OPL_OUTPUT_LOG
  51 static FILE *opl_dbg_fp = NULL;
  52 static FM_OPL *opl_dbg_opl[16];
  53 static int opl_dbg_maxchip,opl_dbg_chip;
  54 #endif
  55
  56 /* -------------------- preliminary define section --------------------- */
  57 /* attack/decay rate time rate */
  58 #define OPL_ARRATE     141280  /* RATE 4 =  2826.24ms @ 3.6MHz */
  59 #define OPL_DRRATE    1956000  /* RATE 4 = 39280.64ms @ 3.6MHz */
  60
  61 #define DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */
  62
  63 #define FREQ_BITS 24                    /* frequency turn          */
  64
  65 /* counter bits = 20 , octerve 7 */
  66 #define FREQ_RATE   (1<<(FREQ_BITS-20))
  67 #define TL_BITS    (FREQ_BITS+2)
  68
  69 /* final output shift , limit minimum and maximum */
  70 #define OPL_OUTSB   (TL_BITS+3-16)              /* OPL output final shift 16bit */
  71 #define OPL_MAXOUT (0x7fff<<OPL_OUTSB)
  72 #define OPL_MINOUT (-0x8000<<OPL_OUTSB)
  73
  74 /* -------------------- quality selection --------------------- */
  75
  76 /* sinwave entries */
  77 /* used static memory = SIN_ENT * 4 (byte) */
  78 #define SIN_ENT 2048
  79
  80 /* output level entries (envelope,sinwave) */
  81 /* envelope counter lower bits */
  82 #define ENV_BITS 16
  83 /* envelope output entries */
  84 #define EG_ENT   4096
  85 /* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */
  86 /* used static  memory = EG_ENT*4 (byte)                     */
  87
  88 #define EG_OFF   ((2*EG_ENT)<<ENV_BITS)  /* OFF          */
  89 #define EG_DED   EG_OFF
  90 #define EG_DST   (EG_ENT<<ENV_BITS)      /* DECAY  START */
  91 #define EG_AED   EG_DST
  92 #define EG_AST   0                       /* ATTACK START */
  93
  94 #define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step  */
  95
  96 /* LFO table entries */
  97 #define VIB_ENT 512
  98 #define VIB_SHIFT (32-9)
  99 #define AMS_ENT 512
 100 #define AMS_SHIFT (32-9)
 101
 102 #define VIB_RATE 256
 103
 104 /* -------------------- local defines , macros --------------------- */
 105
 106 /* register number to channel number , slot offset */
 107 #define SLOT1 0
 108 #define SLOT2 1
 109
 110 /* envelope phase */
 111 #define ENV_MOD_RR  0x00
 112 #define ENV_MOD_DR  0x01
 113 #define ENV_MOD_AR  0x02
 114
 115 /* -------------------- tables --------------------- */
 116 static const int slot_array[32]=
 117 {
 118          0, 2, 4, 1, 3, 5,-1,-1,
 119          6, 8,10, 7, 9,11,-1,-1,
 120         12,14,16,13,15,17,-1,-1,
 121         -1,-1,-1,-1,-1,-1,-1,-1
 122 };
 123
 124 /* key scale level */
 125 /* table is 3dB/OCT , DV converts this in TL step at 6dB/OCT */
 126 #define DV (EG_STEP/2)
 127 static const UINT32 KSL_TABLE[8*16]=
 128 {
 129         /* OCT 0 */
 130          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 131          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 132          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 133          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 134         /* OCT 1 */
 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, 0.750/DV, 1.125/DV, 1.500/DV,
 138          1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV,
 139         /* OCT 2 */
 140          0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
 141          0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV,
 142          3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV,
 143          4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV,
 144         /* OCT 3 */
 145          0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV,
 146          3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV,
 147          6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV,
 148          7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV,
 149         /* OCT 4 */
 150          0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV,
 151          6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV,
 152          9.000/DV, 9.750/DV,10.125/DV,10.500/DV,
 153         10.875/DV,11.250/DV,11.625/DV,12.000/DV,
 154         /* OCT 5 */
 155          0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV,
 156          9.000/DV,10.125/DV,10.875/DV,11.625/DV,
 157         12.000/DV,12.750/DV,13.125/DV,13.500/DV,
 158         13.875/DV,14.250/DV,14.625/DV,15.000/DV,
 159         /* OCT 6 */
 160          0.000/DV, 6.000/DV, 9.000/DV,10.875/DV,
 161         12.000/DV,13.125/DV,13.875/DV,14.625/DV,
 162         15.000/DV,15.750/DV,16.125/DV,16.500/DV,
 163         16.875/DV,17.250/DV,17.625/DV,18.000/DV,
 164         /* OCT 7 */
 165          0.000/DV, 9.000/DV,12.000/DV,13.875/DV,
 166         15.000/DV,16.125/DV,16.875/DV,17.625/DV,
 167         18.000/DV,18.750/DV,19.125/DV,19.500/DV,
 168         19.875/DV,20.250/DV,20.625/DV,21.000/DV
 169 };
 170 #undef DV
 171
 172 /* sustain lebel table (3db per step) */
 173 /* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/
 174 #define SC(db) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST
 175 static const INT32 SL_TABLE[16]={
 176  SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7),
 177  SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31)
 178 };
 179 #undef SC
 180
 181 #define TL_MAX (EG_ENT*2) /* limit(tl + ksr + envelope) + sinwave */
 182 /* TotalLevel : 48 24 12  6  3 1.5 0.75 (dB) */
 183 /* TL_TABLE[ 0      to TL_MAX          ] : plus  section */
 184 /* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */
 185 static INT32 *TL_TABLE;
 186
 187 /* pointers to TL_TABLE with sinwave output offset */
 188 static INT32 **SIN_TABLE;
 189
 190 /* LFO table */
 191 static INT32 *AMS_TABLE;
 192 static INT32 *VIB_TABLE;
 193
 194 /* envelope output curve table */
 195 /* attack + decay + OFF */
 196 static INT32 ENV_CURVE[2*EG_ENT+1];
 197
 198 /* multiple table */
 199 #define ML 2
 200 static const UINT32 MUL_TABLE[16]= {
 201 /* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */
 202    0.50*ML, 1.00*ML, 2.00*ML, 3.00*ML, 4.00*ML, 5.00*ML, 6.00*ML, 7.00*ML,
 203    8.00*ML, 9.00*ML,10.00*ML,10.00*ML,12.00*ML,12.00*ML,15.00*ML,15.00*ML
 204 };
 205 #undef ML
 206
 207 /* dummy attack / decay rate ( when rate == 0 ) */
 208 static INT32 RATE_0[16]=
 209 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
 210
 211 /* -------------------- static state --------------------- */
 212
 213 /* lock level of common table */
 214 static int num_lock = 0;
 215
 216 /* work table */
 217 static void *cur_chip = NULL;   /* current chip point */
 218 /* currenct chip state */
 219 /* static OPLSAMPLE  *bufL,*bufR; */
 220 static OPL_CH *S_CH;
 221 static OPL_CH *E_CH;
 222 static OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2;
 223
 224 static INT32 outd[1];
 225 static INT32 ams;
 226 static INT32 vib;
 227 static INT32 *ams_table;
 228 static INT32 *vib_table;
 229 static INT32 amsIncr;
 230 static INT32 vibIncr;
 231 static INT32 feedback2;         /* connect for SLOT 2 */
 232
 233 /* log output level */
 234 #define LOG_ERR  3      /* ERROR       */
 235 #define LOG_WAR  2      /* WARNING     */
 236 #define LOG_INF  1      /* INFORMATION */
 237
 238 //#define LOG_LEVEL LOG_INF
 239 #define LOG_LEVEL       LOG_ERR
 240
 241 //#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x
 242 #define LOG(n,x)
 243
 244 /* --------------------- subroutines  --------------------- */
 245
 246 static inline int Limit( int val, int max, int min ) {
 247         if ( val > max )
 248                 val = max;
 249         else if ( val < min )
 250                 val = min;
 251
 252         return val;
 253 }
 254
 255 /* status set and IRQ handling */
 256 static inline void OPL_STATUS_SET(FM_OPL *OPL,int flag)
 257 {
 258         /* set status flag */
 259         OPL->status |= flag;
 260         if(!(OPL->status & 0x80))
 261         {
 262                 if(OPL->status & OPL->statusmask)
 263                 {       /* IRQ on */
 264                         OPL->status |= 0x80;
 265                         /* callback user interrupt handler (IRQ is OFF to ON) */
 266                         if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,1);
 267                 }
 268         }
 269 }
 270
 271 /* status reset and IRQ handling */
 272 static inline void OPL_STATUS_RESET(FM_OPL *OPL,int flag)
 273 {
 274         /* reset status flag */
 275         OPL->status &=~flag;
 276         if((OPL->status & 0x80))
 277         {
 278                 if (!(OPL->status & OPL->statusmask) )
 279                 {
 280                         OPL->status &= 0x7f;
 281                         /* callback user interrupt handler (IRQ is ON to OFF) */
 282                         if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,0);
 283                 }
 284         }
 285 }
 286
 287 /* IRQ mask set */
 288 static inline void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag)
 289 {
 290         OPL->statusmask = flag;
 291         /* IRQ handling check */
 292         OPL_STATUS_SET(OPL,0);
 293         OPL_STATUS_RESET(OPL,0);
 294 }
 295
 296 /* ----- key on  ----- */
 297 static inline void OPL_KEYON(OPL_SLOT *SLOT)
 298 {
 299         /* sin wave restart */
 300         SLOT->Cnt = 0;
 301         /* set attack */
 302         SLOT->evm = ENV_MOD_AR;
 303         SLOT->evs = SLOT->evsa;
 304         SLOT->evc = EG_AST;
 305         SLOT->eve = EG_AED;
 306 }
 307 /* ----- key off ----- */
 308 static inline void OPL_KEYOFF(OPL_SLOT *SLOT)
 309 {
 310         if( SLOT->evm > ENV_MOD_RR)
 311         {
 312                 /* set envelope counter from envleope output */
 313                 SLOT->evm = ENV_MOD_RR;
 314                 if( !(SLOT->evc&EG_DST) )
 315                         //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST;
 316                         SLOT->evc = EG_DST;
 317                 SLOT->eve = EG_DED;
 318                 SLOT->evs = SLOT->evsr;
 319         }
 320 }
 321
 322 /* ---------- calcrate Envelope Generator & Phase Generator ---------- */
 323 /* return : envelope output */
 324 static inline UINT32 OPL_CALC_SLOT( OPL_SLOT *SLOT )
 325 {
 326         /* calcrate envelope generator */
 327         if( (SLOT->evc+=SLOT->evs) >= SLOT->eve )
 328         {
 329                 switch( SLOT->evm ){
 330                 case ENV_MOD_AR: /* ATTACK -> DECAY1 */
 331                         /* next DR */
 332                         SLOT->evm = ENV_MOD_DR;
 333                         SLOT->evc = EG_DST;
 334                         SLOT->eve = SLOT->SL;
 335                         SLOT->evs = SLOT->evsd;
 336                         break;
 337                 case ENV_MOD_DR: /* DECAY -> SL or RR */
 338                         SLOT->evc = SLOT->SL;
 339                         SLOT->eve = EG_DED;
 340                         if(SLOT->eg_typ)
 341                         {
 342                                 SLOT->evs = 0;
 343                         }
 344                         else
 345                         {
 346                                 SLOT->evm = ENV_MOD_RR;
 347                                 SLOT->evs = SLOT->evsr;
 348                         }
 349                         break;
 350                 case ENV_MOD_RR: /* RR -> OFF */
 351                         SLOT->evc = EG_OFF;
 352                         SLOT->eve = EG_OFF+1;
 353                         SLOT->evs = 0;
 354                         break;
 355                 }
 356         }
 357         /* calcrate envelope */
 358         return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0);
 359 }
 360
 361 /* set algorithm connection */
 362 static void set_algorithm( OPL_CH *CH)
 363 {
 364         INT32 *carrier = &outd[0];
 365         CH->connect1 = CH->CON ? carrier : &feedback2;
 366         CH->connect2 = carrier;
 367 }
 368
 369 /* ---------- frequency counter for operater update ---------- */
 370 static inline void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT)
 371 {
 372         int ksr;
 373
 374         /* frequency step counter */
 375         SLOT->Incr = CH->fc * SLOT->mul;
 376         ksr = CH->kcode >> SLOT->KSR;
 377
 378         if( SLOT->ksr != ksr )
 379         {
 380                 SLOT->ksr = ksr;
 381                 /* attack , decay rate recalcration */
 382                 SLOT->evsa = SLOT->AR[ksr];
 383                 SLOT->evsd = SLOT->DR[ksr];
 384                 SLOT->evsr = SLOT->RR[ksr];
 385         }
 386         SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
 387 }
 388
 389 /* set multi,am,vib,EG-TYP,KSR,mul */
 390 static inline void set_mul(FM_OPL *OPL,int slot,int v)
 391 {
 392         OPL_CH   *CH   = &OPL->P_CH[slot/2];
 393         OPL_SLOT *SLOT = &CH->SLOT[slot&1];
 394
 395         SLOT->mul    = MUL_TABLE[v&0x0f];
 396         SLOT->KSR    = (v&0x10) ? 0 : 2;
 397         SLOT->eg_typ = (v&0x20)>>5;
 398         SLOT->vib    = (v&0x40);
 399         SLOT->ams    = (v&0x80);
 400         CALC_FCSLOT(CH,SLOT);
 401 }
 402
 403 /* set ksl & tl */
 404 static inline void set_ksl_tl(FM_OPL *OPL,int slot,int v)
 405 {
 406         OPL_CH   *CH   = &OPL->P_CH[slot/2];
 407         OPL_SLOT *SLOT = &CH->SLOT[slot&1];
 408         int ksl = v>>6; /* 0 / 1.5 / 3 / 6 db/OCT */
 409
 410         SLOT->ksl = ksl ? 3-ksl : 31;
 411         SLOT->TL  = (v&0x3f)*(0.75/EG_STEP); /* 0.75db step */
 412
 413         if( !(OPL->mode&0x80) )
 414         {       /* not CSM latch total level */
 415                 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
 416         }
 417 }
 418
 419 /* set attack rate & decay rate  */
 420 static inline void set_ar_dr(FM_OPL *OPL,int slot,int v)
 421 {
 422         OPL_CH   *CH   = &OPL->P_CH[slot/2];
 423         OPL_SLOT *SLOT = &CH->SLOT[slot&1];
 424         int ar = v>>4;
 425         int dr = v&0x0f;
 426
 427         SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0;
 428         SLOT->evsa = SLOT->AR[SLOT->ksr];
 429         if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa;
 430
 431         SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0;
 432         SLOT->evsd = SLOT->DR[SLOT->ksr];
 433         if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd;
 434 }
 435
 436 /* set sustain level & release rate */
 437 static inline void set_sl_rr(FM_OPL *OPL,int slot,int v)
 438 {
 439         OPL_CH   *CH   = &OPL->P_CH[slot/2];
 440         OPL_SLOT *SLOT = &CH->SLOT[slot&1];
 441         int sl = v>>4;
 442         int rr = v & 0x0f;
 443
 444         SLOT->SL = SL_TABLE[sl];
 445         if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL;
 446         SLOT->RR = &OPL->DR_TABLE[rr<<2];
 447         SLOT->evsr = SLOT->RR[SLOT->ksr];
 448         if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr;
 449 }
 450
 451 /* operator output calcrator */
 452 #define OP_OUT(slot,env,con)   slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env]
 453 /* ---------- calcrate one of channel ---------- */
 454 static inline void OPL_CALC_CH( OPL_CH *CH )
 455 {
 456         UINT32 env_out;
 457         OPL_SLOT *SLOT;
 458
 459         feedback2 = 0;
 460         /* SLOT 1 */
 461         SLOT = &CH->SLOT[SLOT1];
 462         env_out=OPL_CALC_SLOT(SLOT);
 463         if( env_out < EG_ENT-1 )
 464         {
 465                 /* PG */
 466                 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
 467                 else          SLOT->Cnt += SLOT->Incr;
 468                 /* connectoion */
 469                 if(CH->FB)
 470                 {
 471                         int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB;
 472                         CH->op1_out[1] = CH->op1_out[0];
 473                         *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1);
 474                 }
 475                 else
 476                 {
 477                         *CH->connect1 += OP_OUT(SLOT,env_out,0);
 478                 }
 479         }else
 480         {
 481                 CH->op1_out[1] = CH->op1_out[0];
 482                 CH->op1_out[0] = 0;
 483         }
 484         /* SLOT 2 */
 485         SLOT = &CH->SLOT[SLOT2];
 486         env_out=OPL_CALC_SLOT(SLOT);
 487         if( env_out < EG_ENT-1 )
 488         {
 489                 /* PG */
 490                 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
 491                 else          SLOT->Cnt += SLOT->Incr;
 492                 /* connectoion */
 493                 outd[0] += OP_OUT(SLOT,env_out, feedback2);
 494         }
 495 }
 496
 497 /* ---------- calcrate rhythm block ---------- */
 498 #define WHITE_NOISE_db 6.0
 499 static inline void OPL_CALC_RH( OPL_CH *CH )
 500 {
 501         UINT32 env_tam,env_sd,env_top,env_hh;
 502         int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP);
 503         INT32 tone8;
 504
 505         OPL_SLOT *SLOT;
 506         int env_out;
 507
 508         /* BD : same as FM serial mode and output level is large */
 509         feedback2 = 0;
 510         /* SLOT 1 */
 511         SLOT = &CH[6].SLOT[SLOT1];
 512         env_out=OPL_CALC_SLOT(SLOT);
 513         if( env_out < EG_ENT-1 )
 514         {
 515                 /* PG */
 516                 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
 517                 else          SLOT->Cnt += SLOT->Incr;
 518                 /* connectoion */
 519                 if(CH[6].FB)
 520                 {
 521                         int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB;
 522                         CH[6].op1_out[1] = CH[6].op1_out[0];
 523                         feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1);
 524                 }
 525                 else
 526                 {
 527                         feedback2 = OP_OUT(SLOT,env_out,0);
 528                 }
 529         }else
 530         {
 531                 feedback2 = 0;
 532                 CH[6].op1_out[1] = CH[6].op1_out[0];
 533                 CH[6].op1_out[0] = 0;
 534         }
 535         /* SLOT 2 */
 536         SLOT = &CH[6].SLOT[SLOT2];
 537         env_out=OPL_CALC_SLOT(SLOT);
 538         if( env_out < EG_ENT-1 )
 539         {
 540                 /* PG */
 541                 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
 542                 else          SLOT->Cnt += SLOT->Incr;
 543                 /* connectoion */
 544                 outd[0] += OP_OUT(SLOT,env_out, feedback2)*2;
 545         }
 546
 547         // SD  (17) = mul14[fnum7] + white noise
 548         // TAM (15) = mul15[fnum8]
 549         // TOP (18) = fnum6(mul18[fnum8]+whitenoise)
 550         // HH  (14) = fnum7(mul18[fnum8]+whitenoise) + white noise
 551         env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise;
 552         env_tam=OPL_CALC_SLOT(SLOT8_1);
 553         env_top=OPL_CALC_SLOT(SLOT8_2);
 554         env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise;
 555
 556         /* PG */
 557         if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE);
 558         else             SLOT7_1->Cnt += 2*SLOT7_1->Incr;
 559         if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE);
 560         else             SLOT7_2->Cnt += (CH[7].fc*8);
 561         if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE);
 562         else             SLOT8_1->Cnt += SLOT8_1->Incr;
 563         if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE);
 564         else             SLOT8_2->Cnt += (CH[8].fc*48);
 565
 566         tone8 = OP_OUT(SLOT8_2,whitenoise,0 );
 567
 568         /* SD */
 569         if( env_sd < EG_ENT-1 )
 570                 outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8;
 571         /* TAM */
 572         if( env_tam < EG_ENT-1 )
 573                 outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2;
 574         /* TOP-CY */
 575         if( env_top < EG_ENT-1 )
 576                 outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2;
 577         /* HH */
 578         if( env_hh  < EG_ENT-1 )
 579                 outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2;
 580 }
 581
 582 /* ----------- initialize time tabls ----------- */
 583 static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE )
 584 {
 585         int i;
 586         double rate;
 587
 588         /* make attack rate & decay rate tables */
 589         for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0;
 590         for (i = 4;i <= 60;i++){
 591                 rate  = OPL->freqbase;                                          /* frequency rate */
 592                 if( i < 60 ) rate *= 1.0+(i&3)*0.25;            /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */
 593                 rate *= 1<<((i>>2)-1);                                          /* b2-5 : shift bit */
 594                 rate *= (double)(EG_ENT<<ENV_BITS);
 595                 OPL->AR_TABLE[i] = rate / ARRATE;
 596                 OPL->DR_TABLE[i] = rate / DRRATE;
 597         }
 598         for (i = 60; i < ARRAY_SIZE(OPL->AR_TABLE); i++)
 599         {
 600                 OPL->AR_TABLE[i] = EG_AED-1;
 601                 OPL->DR_TABLE[i] = OPL->DR_TABLE[60];
 602         }
 603 #if 0
 604         for (i = 0;i < 64 ;i++){        /* make for overflow area */
 605                 LOG(LOG_WAR, ("rate %2d , ar %f ms , dr %f ms\n", i,
 606                         ((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate),
 607                         ((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) ));
 608         }
 609 #endif
 610 }
 611
 612 /* ---------- generic table initialize ---------- */
 613 static int OPLOpenTable( void )
 614 {
 615         int s,t;
 616         double rate;
 617         int i,j;
 618         double pom;
 619
 620         /* allocate dynamic tables */
 621         if( (TL_TABLE = malloc(TL_MAX*2*sizeof(INT32))) == NULL)
 622                 return 0;
 623         if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(INT32 *))) == NULL)
 624         {
 625                 free(TL_TABLE);
 626                 return 0;
 627         }
 628         if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(INT32))) == NULL)
 629         {
 630                 free(TL_TABLE);
 631                 free(SIN_TABLE);
 632                 return 0;
 633         }
 634         if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(INT32))) == NULL)
 635         {
 636                 free(TL_TABLE);
 637                 free(SIN_TABLE);
 638                 free(AMS_TABLE);
 639                 return 0;
 640         }
 641         /* make total level table */
 642         for (t = 0;t < EG_ENT-1 ;t++){
 643                 rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20);   /* dB -> voltage */
 644                 TL_TABLE[       t] =  (int)rate;
 645                 TL_TABLE[TL_MAX+t] = -TL_TABLE[t];
 646 /*              LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/
 647         }
 648         /* fill volume off area */
 649         for ( t = EG_ENT-1; t < TL_MAX ;t++){
 650                 TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0;
 651         }
 652
 653         /* make sinwave table (total level offet) */
 654         /* degree 0 = degree 180                   = off */
 655         SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2]         = &TL_TABLE[EG_ENT-1];
 656         for (s = 1;s <= SIN_ENT/4;s++){
 657                 pom = sin(2*PI*s/SIN_ENT); /* sin     */
 658                 pom = 20*log10(1/pom);     /* decibel */
 659                 j = pom / EG_STEP;         /* TL_TABLE steps */
 660
 661         /* degree 0   -  90    , degree 180 -  90 : plus section */
 662                 SIN_TABLE[          s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j];
 663         /* degree 180 - 270    , degree 360 - 270 : minus section */
 664                 SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT  -s] = &TL_TABLE[TL_MAX+j];
 665 /*              LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/
 666         }
 667         for (s = 0;s < SIN_ENT;s++)
 668         {
 669                 SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT];
 670                 SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)];
 671                 SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s];
 672         }
 673
 674         /* envelope counter -> envelope output table */
 675         for (i=0; i<EG_ENT; i++)
 676         {
 677                 /* ATTACK curve */
 678                 pom = pow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT;
 679                 /* if( pom >= EG_ENT ) pom = EG_ENT-1; */
 680                 ENV_CURVE[i] = (int)pom;
 681                 /* DECAY ,RELEASE curve */
 682                 ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i;
 683         }
 684         /* off */
 685         ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1;
 686         /* make LFO ams table */
 687         for (i=0; i<AMS_ENT; i++)
 688         {
 689                 pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */
 690                 AMS_TABLE[i]         = (1.0/EG_STEP)*pom; /* 1dB   */
 691                 AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom; /* 4.8dB */
 692         }
 693         /* make LFO vibrate table */
 694         for (i=0; i<VIB_ENT; i++)
 695         {
 696                 /* 100cent = 1seminote = 6% ?? */
 697                 pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */
 698                 VIB_TABLE[i]         = VIB_RATE + (pom*0.07); /* +- 7cent */
 699                 VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14); /* +-14cent */
 700                 /* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */
 701         }
 702         return 1;
 703 }
 704
 705
 706 static void OPLCloseTable( void )
 707 {
 708         free(TL_TABLE);
 709         free(SIN_TABLE);
 710         free(AMS_TABLE);
 711         free(VIB_TABLE);
 712 }
 713
 714 /* CSM Key Control */
 715 static inline void CSMKeyControll(OPL_CH *CH)
 716 {
 717         OPL_SLOT *slot1 = &CH->SLOT[SLOT1];
 718         OPL_SLOT *slot2 = &CH->SLOT[SLOT2];
 719         /* all key off */
 720         OPL_KEYOFF(slot1);
 721         OPL_KEYOFF(slot2);
 722         /* total level latch */
 723         slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl);
 724         slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl);
 725         /* key on */
 726         CH->op1_out[0] = CH->op1_out[1] = 0;
 727         OPL_KEYON(slot1);
 728         OPL_KEYON(slot2);
 729 }
 730
 731 /* ---------- opl initialize ---------- */
 732 static void OPL_initialize(FM_OPL *OPL)
 733 {
 734         int fn;
 735
 736         /* frequency base */
 737         OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72  : 0;
 738         /* Timer base time */
 739         OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 );
 740         /* make time tables */
 741         init_timetables( OPL , OPL_ARRATE , OPL_DRRATE );
 742         /* make fnumber -> increment counter table */
 743         for( fn=0 ; fn < 1024 ; fn++ )
 744         {
 745                 OPL->FN_TABLE[fn] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2;
 746         }
 747         /* LFO freq.table */
 748         OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0;
 749         OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0;
 750 }
 751
 752 /* ---------- write a OPL registers ---------- */
 753 static void OPLWriteReg(FM_OPL *OPL, int r, int v)
 754 {
 755         OPL_CH *CH;
 756         int slot;
 757         int block_fnum;
 758
 759         switch(r&0xe0)
 760         {
 761         case 0x00: /* 00-1f:control */
 762                 switch(r&0x1f)
 763                 {
 764                 case 0x01:
 765                         /* wave selector enable */
 766                         if(OPL->type&OPL_TYPE_WAVESEL)
 767                         {
 768                                 OPL->wavesel = v&0x20;
 769                                 if(!OPL->wavesel)
 770                                 {
 771                                         /* preset compatible mode */
 772                                         int c;
 773                                         for(c=0;c<OPL->max_ch;c++)
 774                                         {
 775                                                 OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0];
 776                                                 OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0];
 777                                         }
 778                                 }
 779                         }
 780                         return;
 781                 case 0x02:      /* Timer 1 */
 782                         OPL->T[0] = (256-v)*4;
 783                         break;
 784                 case 0x03:      /* Timer 2 */
 785                         OPL->T[1] = (256-v)*16;
 786                         return;
 787                 case 0x04:      /* IRQ clear / mask and Timer enable */
 788                         if(v&0x80)
 789                         {       /* IRQ flag clear */
 790                                 OPL_STATUS_RESET(OPL,0x7f);
 791                         }
 792                         else
 793                         {       /* set IRQ mask ,timer enable*/
 794                                 UINT8 st1 = v&1;
 795                                 UINT8 st2 = (v>>1)&1;
 796                                 /* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */
 797                                 OPL_STATUS_RESET(OPL,v&0x78);
 798                                 OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01);
 799                                 /* timer 2 */
 800                                 if(OPL->st[1] != st2)
 801                                 {
 802                                         double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0;
 803                                         OPL->st[1] = st2;
 804                                         if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+1,interval);
 805                                 }
 806                                 /* timer 1 */
 807                                 if(OPL->st[0] != st1)
 808                                 {
 809                                         double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0;
 810                                         OPL->st[0] = st1;
 811                                         if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+0,interval);
 812                                 }
 813                         }
 814                         return;
 815 #if BUILD_Y8950
 816                 case 0x06:              /* Key Board OUT */
 817                         if(OPL->type&OPL_TYPE_KEYBOARD)
 818                         {
 819                                 if(OPL->keyboardhandler_w)
 820                                         OPL->keyboardhandler_w(OPL->keyboard_param,v);
 821                                 else
 822                                         LOG(LOG_WAR,("OPL:write unmapped KEYBOARD port\n"));
 823                         }
 824                         return;
 825                 case 0x07:      /* DELTA-T control : START,REC,MEMDATA,REPT,SPOFF,x,x,RST */
 826                         if(OPL->type&OPL_TYPE_ADPCM)
 827                                 YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v);
 828                         return;
 829                 case 0x08:      /* MODE,DELTA-T : CSM,NOTESEL,x,x,smpl,da/ad,64k,rom */
 830                         OPL->mode = v;
 831                         v&=0x1f;        /* for DELTA-T unit */
 832                 case 0x09:              /* START ADD */
 833                 case 0x0a:
 834                 case 0x0b:              /* STOP ADD  */
 835                 case 0x0c:
 836                 case 0x0d:              /* PRESCALE   */
 837                 case 0x0e:
 838                 case 0x0f:              /* ADPCM data */
 839                 case 0x10:              /* DELTA-N    */
 840                 case 0x11:              /* DELTA-N    */
 841                 case 0x12:              /* EG-CTRL    */
 842                         if(OPL->type&OPL_TYPE_ADPCM)
 843                                 YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v);
 844                         return;
 845 #if 0
 846                 case 0x15:              /* DAC data    */
 847                 case 0x16:
 848                 case 0x17:              /* SHIFT    */
 849                         return;
 850                 case 0x18:              /* I/O CTRL (Direction) */
 851                         if(OPL->type&OPL_TYPE_IO)
 852                                 OPL->portDirection = v&0x0f;
 853                         return;
 854                 case 0x19:              /* I/O DATA */
 855                         if(OPL->type&OPL_TYPE_IO)
 856                         {
 857                                 OPL->portLatch = v;
 858                                 if(OPL->porthandler_w)
 859                                         OPL->porthandler_w(OPL->port_param,v&OPL->portDirection);
 860                         }
 861                         return;
 862                 case 0x1a:              /* PCM data */
 863                         return;
 864 #endif
 865 #endif
 866                 }
 867                 break;
 868         case 0x20:      /* am,vib,ksr,eg type,mul */
 869                 slot = slot_array[r&0x1f];
 870                 if(slot == -1) return;
 871                 set_mul(OPL,slot,v);
 872                 return;
 873         case 0x40:
 874                 slot = slot_array[r&0x1f];
 875                 if(slot == -1) return;
 876                 set_ksl_tl(OPL,slot,v);
 877                 return;
 878         case 0x60:
 879                 slot = slot_array[r&0x1f];
 880                 if(slot == -1) return;
 881                 set_ar_dr(OPL,slot,v);
 882                 return;
 883         case 0x80:
 884                 slot = slot_array[r&0x1f];
 885                 if(slot == -1) return;
 886                 set_sl_rr(OPL,slot,v);
 887                 return;
 888         case 0xa0:
 889                 switch(r)
 890                 {
 891                 case 0xbd:
 892                         /* amsep,vibdep,r,bd,sd,tom,tc,hh */
 893                         {
 894                         UINT8 rkey = OPL->rhythm^v;
 895                         OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0];
 896                         OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0];
 897                         OPL->rhythm  = v&0x3f;
 898                         if(OPL->rhythm&0x20)
 899                         {
 900 #if 0
 901                                 usrintf_showmessage("OPL Rhythm mode select");
 902 #endif
 903                                 /* BD key on/off */
 904                                 if(rkey&0x10)
 905                                 {
 906                                         if(v&0x10)
 907                                         {
 908                                                 OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0;
 909                                                 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]);
 910                                                 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]);
 911                                         }
 912                                         else
 913                                         {
 914                                                 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]);
 915                                                 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]);
 916                                         }
 917                                 }
 918                                 /* SD key on/off */
 919                                 if(rkey&0x08)
 920                                 {
 921                                         if(v&0x08) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]);
 922                                         else       OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]);
 923                                 }/* TAM key on/off */
 924                                 if(rkey&0x04)
 925                                 {
 926                                         if(v&0x04) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]);
 927                                         else       OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]);
 928                                 }
 929                                 /* TOP-CY key on/off */
 930                                 if(rkey&0x02)
 931                                 {
 932                                         if(v&0x02) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]);
 933                                         else       OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]);
 934                                 }
 935                                 /* HH key on/off */
 936                                 if(rkey&0x01)
 937                                 {
 938                                         if(v&0x01) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]);
 939                                         else       OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]);
 940                                 }
 941                         }
 942                         }
 943                         return;
 944                 }
 945                 /* keyon,block,fnum */
 946                 if( (r&0x0f) > 8) return;
 947                 CH = &OPL->P_CH[r&0x0f];
 948                 if(!(r&0x10))
 949                 {       /* a0-a8 */
 950                         block_fnum  = (CH->block_fnum&0x1f00) | v;
 951                 }
 952                 else
 953                 {       /* b0-b8 */
 954                         int keyon = (v>>5)&1;
 955                         block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff);
 956                         if(CH->keyon != keyon)
 957                         {
 958                                 if( (CH->keyon=keyon) )
 959                                 {
 960                                         CH->op1_out[0] = CH->op1_out[1] = 0;
 961                                         OPL_KEYON(&CH->SLOT[SLOT1]);
 962                                         OPL_KEYON(&CH->SLOT[SLOT2]);
 963                                 }
 964                                 else
 965                                 {
 966                                         OPL_KEYOFF(&CH->SLOT[SLOT1]);
 967                                         OPL_KEYOFF(&CH->SLOT[SLOT2]);
 968                                 }
 969                         }
 970                 }
 971                 /* update */
 972                 if(CH->block_fnum != block_fnum)
 973                 {
 974                         int blockRv = 7-(block_fnum>>10);
 975                         int fnum   = block_fnum&0x3ff;
 976                         CH->block_fnum = block_fnum;
 977
 978                         CH->ksl_base = KSL_TABLE[block_fnum>>6];
 979                         CH->fc = OPL->FN_TABLE[fnum]>>blockRv;
 980                         CH->kcode = CH->block_fnum>>9;
 981                         if( (OPL->mode&0x40) && CH->block_fnum&0x100) CH->kcode |=1;
 982                         CALC_FCSLOT(CH,&CH->SLOT[SLOT1]);
 983                         CALC_FCSLOT(CH,&CH->SLOT[SLOT2]);
 984                 }
 985                 return;
 986         case 0xc0:
 987                 /* FB,C */
 988                 if( (r&0x0f) > 8) return;
 989                 CH = &OPL->P_CH[r&0x0f];
 990                 {
 991                 int feedback = (v>>1)&7;
 992                 CH->FB   = feedback ? (8+1) - feedback : 0;
 993                 CH->CON = v&1;
 994                 set_algorithm(CH);
 995                 }
 996                 return;
 997         case 0xe0: /* wave type */
 998                 slot = slot_array[r&0x1f];
 999                 if(slot == -1) return;
1000                 CH = &OPL->P_CH[slot/2];
1001                 if(OPL->wavesel)
1002                 {
1003                         /* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */
1004                         CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT];
1005                 }
1006                 return;
1007         }
1008 }
1009
1010 /* lock/unlock for common table */
1011 static int OPL_LockTable(void)
1012 {
1013         num_lock++;
1014         if(num_lock>1) return 0;
1015         /* first time */
1016         cur_chip = NULL;
1017         /* allocate total level table (128kb space) */
1018         if( !OPLOpenTable() )
1019         {
1020                 num_lock--;
1021                 return -1;
1022         }
1023         return 0;
1024 }
1025
1026 static void OPL_UnLockTable(void)
1027 {
1028         if(num_lock) num_lock--;
1029         if(num_lock) return;
1030         /* last time */
1031         cur_chip = NULL;
1032         OPLCloseTable();
1033 }
1034
1035 #if (BUILD_YM3812 || BUILD_YM3526)
1036 /*******************************************************************************/
1037 /*              YM3812 local section                                                   */
1038 /*******************************************************************************/
1039
1040 /* ---------- update one of chip ----------- */
1041 void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, int length)
1042 {
1043     int i;
1044         int data;
1045         OPLSAMPLE *buf = buffer;
1046         UINT32 amsCnt  = OPL->amsCnt;
1047         UINT32 vibCnt  = OPL->vibCnt;
1048         UINT8 rhythm = OPL->rhythm&0x20;
1049         OPL_CH *CH,*R_CH;
1050
1051         if( (void *)OPL != cur_chip ){
1052                 cur_chip = (void *)OPL;
1053                 /* channel pointers */
1054                 S_CH = OPL->P_CH;
1055                 E_CH = &S_CH[9];
1056                 /* rhythm slot */
1057                 SLOT7_1 = &S_CH[7].SLOT[SLOT1];
1058                 SLOT7_2 = &S_CH[7].SLOT[SLOT2];
1059                 SLOT8_1 = &S_CH[8].SLOT[SLOT1];
1060                 SLOT8_2 = &S_CH[8].SLOT[SLOT2];
1061                 /* LFO state */
1062                 amsIncr = OPL->amsIncr;
1063                 vibIncr = OPL->vibIncr;
1064                 ams_table = OPL->ams_table;
1065                 vib_table = OPL->vib_table;
1066         }
1067         R_CH = rhythm ? &S_CH[6] : E_CH;
1068     for( i=0; i < length ; i++ )
1069         {
1070                 /*            channel A         channel B         channel C      */
1071                 /* LFO */
1072                 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT];
1073                 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT];
1074                 outd[0] = 0;
1075                 /* FM part */
1076                 for(CH=S_CH ; CH < R_CH ; CH++)
1077                         OPL_CALC_CH(CH);
1078                 /* Rythn part */
1079                 if(rhythm)
1080                         OPL_CALC_RH(S_CH);
1081                 /* limit check */
1082                 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT );
1083                 /* store to sound buffer */
1084                 buf[i] = data >> OPL_OUTSB;
1085         }
1086
1087         OPL->amsCnt = amsCnt;
1088         OPL->vibCnt = vibCnt;
1089 #ifdef OPL_OUTPUT_LOG
1090         if(opl_dbg_fp)
1091         {
1092                 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++)
1093                         if( opl_dbg_opl[opl_dbg_chip] == OPL) break;
1094                 fprintf(opl_dbg_fp,"%c%c%c",0x20+opl_dbg_chip,length&0xff,length/256);
1095         }
1096 #endif
1097 }
1098 #endif /* (BUILD_YM3812 || BUILD_YM3526) */
1099
1100 #if BUILD_Y8950
1101
1102 void Y8950UpdateOne(FM_OPL *OPL, INT16 *buffer, int length)
1103 {
1104     int i;
1105         int data;
1106         OPLSAMPLE *buf = buffer;
1107         UINT32 amsCnt  = OPL->amsCnt;
1108         UINT32 vibCnt  = OPL->vibCnt;
1109         UINT8 rhythm = OPL->rhythm&0x20;
1110         OPL_CH *CH,*R_CH;
1111         YM_DELTAT *DELTAT = OPL->deltat;
1112
1113         /* setup DELTA-T unit */
1114         YM_DELTAT_DECODE_PRESET(DELTAT);
1115
1116         if( (void *)OPL != cur_chip ){
1117                 cur_chip = (void *)OPL;
1118                 /* channel pointers */
1119                 S_CH = OPL->P_CH;
1120                 E_CH = &S_CH[9];
1121                 /* rhythm slot */
1122                 SLOT7_1 = &S_CH[7].SLOT[SLOT1];
1123                 SLOT7_2 = &S_CH[7].SLOT[SLOT2];
1124                 SLOT8_1 = &S_CH[8].SLOT[SLOT1];
1125                 SLOT8_2 = &S_CH[8].SLOT[SLOT2];
1126                 /* LFO state */
1127                 amsIncr = OPL->amsIncr;
1128                 vibIncr = OPL->vibIncr;
1129                 ams_table = OPL->ams_table;
1130                 vib_table = OPL->vib_table;
1131         }
1132         R_CH = rhythm ? &S_CH[6] : E_CH;
1133     for( i=0; i < length ; i++ )
1134         {
1135                 /*            channel A         channel B         channel C      */
1136                 /* LFO */
1137                 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT];
1138                 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT];
1139                 outd[0] = 0;
1140                 /* deltaT ADPCM */
1141                 if( DELTAT->portstate )
1142                         YM_DELTAT_ADPCM_CALC(DELTAT);
1143                 /* FM part */
1144                 for(CH=S_CH ; CH < R_CH ; CH++)
1145                         OPL_CALC_CH(CH);
1146                 /* Rythn part */
1147                 if(rhythm)
1148                         OPL_CALC_RH(S_CH);
1149                 /* limit check */
1150                 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT );
1151                 /* store to sound buffer */
1152                 buf[i] = data >> OPL_OUTSB;
1153         }
1154         OPL->amsCnt = amsCnt;
1155         OPL->vibCnt = vibCnt;
1156         /* deltaT START flag */
1157         if( !DELTAT->portstate )
1158                 OPL->status &= 0xfe;
1159 }
1160 #endif
1161
1162 /* ---------- reset one of chip ---------- */
1163 void OPLResetChip(FM_OPL *OPL)
1164 {
1165         int c,s;
1166         int i;
1167
1168         /* reset chip */
1169         OPL->mode   = 0;        /* normal mode */
1170         OPL_STATUS_RESET(OPL,0x7f);
1171         /* reset with register write */
1172         OPLWriteReg(OPL,0x01,0); /* wabesel disable */
1173         OPLWriteReg(OPL,0x02,0); /* Timer1 */
1174         OPLWriteReg(OPL,0x03,0); /* Timer2 */
1175         OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */
1176         for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0);
1177         /* reset operator parameter */
1178         for( c = 0 ; c < OPL->max_ch ; c++ )
1179         {
1180                 OPL_CH *CH = &OPL->P_CH[c];
1181                 /* OPL->P_CH[c].PAN = OPN_CENTER; */
1182                 for(s = 0 ; s < 2 ; s++ )
1183                 {
1184                         /* wave table */
1185                         CH->SLOT[s].wavetable = &SIN_TABLE[0];
1186                         /* CH->SLOT[s].evm = ENV_MOD_RR; */
1187                         CH->SLOT[s].evc = EG_OFF;
1188                         CH->SLOT[s].eve = EG_OFF+1;
1189                         CH->SLOT[s].evs = 0;
1190                 }
1191         }
1192 #if BUILD_Y8950
1193         if(OPL->type&OPL_TYPE_ADPCM)
1194         {
1195                 YM_DELTAT *DELTAT = OPL->deltat;
1196
1197                 DELTAT->freqbase = OPL->freqbase;
1198                 DELTAT->output_pointer = outd;
1199                 DELTAT->portshift = 5;
1200                 DELTAT->output_range = DELTAT_MIXING_LEVEL<<TL_BITS;
1201                 YM_DELTAT_ADPCM_Reset(DELTAT,0);
1202         }
1203 #endif
1204 }
1205
1206 /* ----------  Create one of vietual YM3812 ----------       */
1207 /* 'rate'  is sampling rate and 'bufsiz' is the size of the  */
1208 FM_OPL *OPLCreate(int type, int clock, int rate)
1209 {
1210         char *ptr;
1211         FM_OPL *OPL;
1212         int state_size;
1213         int max_ch = 9; /* normaly 9 channels */
1214
1215         if( OPL_LockTable() ==-1) return NULL;
1216         /* allocate OPL state space */
1217         state_size  = sizeof(FM_OPL);
1218         state_size += sizeof(OPL_CH)*max_ch;
1219 #if BUILD_Y8950
1220         if(type&OPL_TYPE_ADPCM) state_size+= sizeof(YM_DELTAT);
1221 #endif
1222         /* allocate memory block */
1223         ptr = malloc(state_size);
1224         if(ptr==NULL) return NULL;
1225         /* clear */
1226         memset(ptr,0,state_size);
1227         OPL        = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL);
1228         OPL->P_CH  = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch;
1229 #if BUILD_Y8950
1230         if(type&OPL_TYPE_ADPCM) OPL->deltat = (YM_DELTAT *)ptr; ptr+=sizeof(YM_DELTAT);
1231 #endif
1232         /* set channel state pointer */
1233         OPL->type  = type;
1234         OPL->clock = clock;
1235         OPL->rate  = rate;
1236         OPL->max_ch = max_ch;
1237         /* init grobal tables */
1238         OPL_initialize(OPL);
1239         /* reset chip */
1240         OPLResetChip(OPL);
1241 #ifdef OPL_OUTPUT_LOG
1242         if(!opl_dbg_fp)
1243         {
1244                 opl_dbg_fp = fopen("opllog.opl","wb");
1245                 opl_dbg_maxchip = 0;
1246         }
1247         if(opl_dbg_fp)
1248         {
1249                 opl_dbg_opl[opl_dbg_maxchip] = OPL;
1250                 fprintf(opl_dbg_fp,"%c%c%c%c%c%c",0x00+opl_dbg_maxchip,
1251                         type,
1252                         clock&0xff,
1253                         (clock/0x100)&0xff,
1254                         (clock/0x10000)&0xff,
1255                         (clock/0x1000000)&0xff);
1256                 opl_dbg_maxchip++;
1257         }
1258 #endif
1259         return OPL;
1260 }
1261
1262 /* ----------  Destroy one of vietual YM3812 ----------       */
1263 void OPLDestroy(FM_OPL *OPL)
1264 {
1265 #ifdef OPL_OUTPUT_LOG
1266         if(opl_dbg_fp)
1267         {
1268                 fclose(opl_dbg_fp);
1269                 opl_dbg_fp = NULL;
1270         }
1271 #endif
1272         OPL_UnLockTable();
1273         free(OPL);
1274 }
1275
1276 /* ----------  Option handlers ----------       */
1277
1278 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset)
1279 {
1280         OPL->TimerHandler   = TimerHandler;
1281         OPL->TimerParam = channelOffset;
1282 }
1283 void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param)
1284 {
1285         OPL->IRQHandler     = IRQHandler;
1286         OPL->IRQParam = param;
1287 }
1288 void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param)
1289 {
1290         OPL->UpdateHandler = UpdateHandler;
1291         OPL->UpdateParam = param;
1292 }
1293 #if BUILD_Y8950
1294 void OPLSetPortHandler(FM_OPL *OPL,OPL_PORTHANDLER_W PortHandler_w,OPL_PORTHANDLER_R PortHandler_r,int param)
1295 {
1296         OPL->porthandler_w = PortHandler_w;
1297         OPL->porthandler_r = PortHandler_r;
1298         OPL->port_param = param;
1299 }
1300
1301 void OPLSetKeyboardHandler(FM_OPL *OPL,OPL_PORTHANDLER_W KeyboardHandler_w,OPL_PORTHANDLER_R KeyboardHandler_r,int param)
1302 {
1303         OPL->keyboardhandler_w = KeyboardHandler_w;
1304         OPL->keyboardhandler_r = KeyboardHandler_r;
1305         OPL->keyboard_param = param;
1306 }
1307 #endif
1308 /* ---------- YM3812 I/O interface ---------- */
1309 int OPLWrite(FM_OPL *OPL,int a,int v)
1310 {
1311         if( !(a&1) )
1312         {       /* address port */
1313                 OPL->address = v & 0xff;
1314         }
1315         else
1316         {       /* data port */
1317                 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0);
1318 #ifdef OPL_OUTPUT_LOG
1319         if(opl_dbg_fp)
1320         {
1321                 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++)
1322                         if( opl_dbg_opl[opl_dbg_chip] == OPL) break;
1323                 fprintf(opl_dbg_fp,"%c%c%c",0x10+opl_dbg_chip,OPL->address,v);
1324         }
1325 #endif
1326                 OPLWriteReg(OPL,OPL->address,v);
1327         }
1328         return OPL->status>>7;
1329 }
1330
1331 unsigned char OPLRead(FM_OPL *OPL,int a)
1332 {
1333         if( !(a&1) )
1334         {       /* status port */
1335                 return OPL->status & (OPL->statusmask|0x80);
1336         }
1337         /* data port */
1338         switch(OPL->address)
1339         {
1340         case 0x05: /* KeyBoard IN */
1341                 if(OPL->type&OPL_TYPE_KEYBOARD)
1342                 {
1343                         if(OPL->keyboardhandler_r)
1344                                 return OPL->keyboardhandler_r(OPL->keyboard_param);
1345                         else {
1346                                 LOG(LOG_WAR,("OPL:read unmapped KEYBOARD port\n"));
1347                         }
1348                 }
1349                 return 0;
1350 #if 0
1351         case 0x0f: /* ADPCM-DATA  */
1352                 return 0;
1353 #endif
1354         case 0x19: /* I/O DATA    */
1355                 if(OPL->type&OPL_TYPE_IO)
1356                 {
1357                         if(OPL->porthandler_r)
1358                                 return OPL->porthandler_r(OPL->port_param);
1359                         else {
1360                                 LOG(LOG_WAR,("OPL:read unmapped I/O port\n"));
1361                         }
1362                 }
1363                 return 0;
1364         case 0x1a: /* PCM-DATA    */
1365                 return 0;
1366         }
1367         return 0;
1368 }
1369
1370 int OPLTimerOver(FM_OPL *OPL,int c)
1371 {
1372         if( c )
1373         {       /* Timer B */
1374                 OPL_STATUS_SET(OPL,0x20);
1375         }
1376         else
1377         {       /* Timer A */
1378                 OPL_STATUS_SET(OPL,0x40);
1379                 /* CSM mode key,TL control */
1380                 if( OPL->mode & 0x80 )
1381                 {       /* CSM mode total level latch and auto key on */
1382                         int ch;
1383                         if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0);
1384                         for(ch=0;ch<9;ch++)
1385                                 CSMKeyControll( &OPL->P_CH[ch] );
1386                 }
1387         }
1388         /* reload timer */
1389         if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+c,(double)OPL->T[c]*OPL->TimerBase);
1390         return OPL->status>>7;
1391 }