apps/plugins/mikmod/virtch.c

   1 /*      MikMod sound library
   2         (c) 1998, 1999, 2000, 2001, 2002 Miodrag Vallat and others - see file
   3         AUTHORS for complete list.
   4
   5         This library is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU Library General Public License as
   7         published by the Free Software Foundation; either version 2 of
   8         the License, or (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13         GNU Library General Public License for more details.
  14
  15         You should have received a copy of the GNU Library General Public
  16         License along with this library; if not, write to the Free Software
  17         Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18         02111-1307, USA.
  19 */
  20
  21 /*==============================================================================
  22
  23   $Id: virtch.c,v 1.4 2005/05/18 13:42:23 raphassenat Exp $
  24
  25   Sample mixing routines, using a 32 bits mixing buffer.
  26
  27 ==============================================================================*/
  28
  29 /*
  30
  31   Optional features include:
  32     (a) 4-step reverb (for 16 bit output only)
  33     (b) Interpolation of sample data during mixing
  34     (c) Dolby Surround Sound
  35 */
  36 #if 0
  37 #include <assert.h>
  38 #endif
  39
  40 #ifdef HAVE_CONFIG_H
  41 #include "config.h"
  42 #endif
  43
  44 #include <stddef.h>
  45 #ifdef HAVE_MEMORY_H
  46 #include <memory.h>
  47 #endif
  48 #include <string.h>
  49
  50 #include "mikmod_internals.h"
  51 #include "mikmod.h"
  52
  53 /*
  54    Constant definitions
  55    ====================
  56
  57         BITSHIFT
  58                 Controls the maximum volume of the sound output.  All data is shifted
  59                 right by BITSHIFT after being mixed. Higher values result in quieter
  60                 sound and less chance of distortion.
  61
  62         REVERBERATION
  63                 Controls the duration of the reverb. Larger values represent a shorter
  64                 reverb loop. Smaller values extend the reverb but can result in more of
  65                 an echo-ish sound.
  66
  67 */
  68
  69 #define BITSHIFT                9
  70 #define REVERBERATION   110000L
  71
  72 #define FRACBITS 11
  73 #define FRACMASK ((1L<<FRACBITS)-1L)
  74
  75 #define TICKLSIZE 8192
  76 #define TICKWSIZE (TICKLSIZE<<1)
  77 #define TICKBSIZE (TICKWSIZE<<1)
  78
  79 #define CLICK_SHIFT  6
  80 #define CLICK_BUFFER (1L<<CLICK_SHIFT)
  81
  82 #ifndef MIN
  83 #define MIN(a,b) (((a)<(b)) ? (a) : (b))
  84 #endif
  85
  86 typedef struct VINFO {
  87         UBYTE     kick;              /* =1 -> sample has to be restarted */
  88         UBYTE     active;            /* =1 -> sample is playing */
  89         UWORD     flags;             /* 16/8 bits looping/one-shot */
  90         SWORD     handle;            /* identifies the sample */
  91         ULONG     start;             /* start index */
  92         ULONG     size;              /* samplesize */
  93         ULONG     reppos;            /* loop start */
  94         ULONG     repend;            /* loop end */
  95         ULONG     frq;               /* current frequency */
  96         int       vol;               /* current volume */
  97         int       pan;               /* current panning position */
  98
  99         int       rampvol;
 100         int       lvolsel,rvolsel;   /* Volume factor in range 0-255 */
 101         int       oldlvol,oldrvol;
 102
 103         SLONGLONG current;           /* current index in the sample */
 104         SLONGLONG increment;         /* increment value */
 105 } VINFO;
 106
 107 static  SWORD **Samples;
 108 static  VINFO *vinf=NULL,*vnf;
 109 static  long tickleft,samplesthatfit,vc_memory=0;
 110 static  int vc_softchn;
 111 static  SLONGLONG idxsize,idxlpos,idxlend;
 112 static  SLONG *vc_tickbuf=NULL;
 113 static  UWORD vc_mode;
 114
 115 /* Reverb control variables */
 116
 117 static  int RVc1, RVc2, RVc3, RVc4, RVc5, RVc6, RVc7, RVc8;
 118 static  ULONG RVRindex;
 119
 120 /* For Mono or Left Channel */
 121 static  SLONG *RVbufL1=NULL,*RVbufL2=NULL,*RVbufL3=NULL,*RVbufL4=NULL,
 122                       *RVbufL5=NULL,*RVbufL6=NULL,*RVbufL7=NULL,*RVbufL8=NULL;
 123
 124 /* For Stereo only (Right Channel) */
 125 static  SLONG *RVbufR1=NULL,*RVbufR2=NULL,*RVbufR3=NULL,*RVbufR4=NULL,
 126                       *RVbufR5=NULL,*RVbufR6=NULL,*RVbufR7=NULL,*RVbufR8=NULL;
 127
 128 #ifdef NATIVE_64BIT_INT
 129 #define NATIVE SLONGLONG
 130 #else
 131 #define NATIVE SLONG
 132 #endif
 133 #if defined HAVE_SSE2 || defined HAVE_ALTIVEC
 134
 135 static size_t MixSIMDMonoNormal(const SWORD* srce,SLONG* dest,size_t index, size_t increment,size_t todo)
 136 {
 137         // TODO:
 138         SWORD sample;
 139         SLONG lvolsel = vnf->lvolsel;
 140
 141         while(todo--) {
 142                 sample = srce[index >> FRACBITS];
 143                 index += increment;
 144
 145                 *dest++ += lvolsel * sample;
 146         }
 147         return index;
 148 }
 149
 150 static size_t MixSIMDStereoNormal(const SWORD* srce, SLONG* dest, size_t index, size_t increment,size_t todo)
 151 {
 152         SWORD vol[8] = {vnf->lvolsel, vnf->rvolsel};
 153         SWORD sample;
 154         SLONG remain = todo;
 155
 156         // Dest can be misaligned ...
 157         while(!IS_ALIGNED_16(dest)) {
 158                 sample=srce[(index += increment) >> FRACBITS];
 159                 *dest++ += vol[0] * sample;
 160                 *dest++ += vol[1] * sample;
 161                 todo--;
 162         }
 163
 164         // Srce is always aligned ...
 165
 166 #if defined HAVE_SSE2
 167         remain = todo&3;
 168         {
 169                 __m128i v0 = _mm_set_epi16(0, vol[1],
 170                                                                    0, vol[0],
 171                                                                    0, vol[1],
 172                                                                    0, vol[0]);
 173                 for(todo>>=2;todo; todo--)
 174                 {
 175                         SWORD s0 = srce[(index += increment) >> FRACBITS];
 176                         SWORD s1 = srce[(index += increment) >> FRACBITS];
 177                         SWORD s2 = srce[(index += increment) >> FRACBITS];
 178                         SWORD s3 = srce[(index += increment) >> FRACBITS];
 179                         __m128i v1 = _mm_set_epi16(0, s1, 0, s1, 0, s0, 0, s0);
 180                         __m128i v2 = _mm_set_epi16(0, s3, 0, s3, 0, s2, 0, s2);
 181                         __m128i v3 = _mm_load_si128((__m128i*)(dest+0));
 182                         __m128i v4 = _mm_load_si128((__m128i*)(dest+4));
 183                         _mm_store_si128((__m128i*)(dest+0), _mm_add_epi32(v3, _mm_madd_epi16(v0, v1)));
 184                         _mm_store_si128((__m128i*)(dest+4), _mm_add_epi32(v4, _mm_madd_epi16(v0, v2)));
 185                         dest+=8;
 186                 }
 187         }
 188
 189 #elif defined HAVE_ALTIVEC
 190         remain = todo&3;
 191         {
 192                 vector signed short r0 = vec_ld(0, vol);
 193                 vector signed short v0 = vec_perm(r0, r0, (vector unsigned char)(0, 1, // l
 194                                                                                                                                                  0, 1, // l
 195                                                                                                                                                  2, 3, // r
 196                                                                                                                                                  2, 1, // r
 197                                                                                                                                                  0, 1, // l
 198                                                                                                                                                  0, 1, // l
 199                                                                                                                                                  2, 3, // r
 200                                                                                                                                                  2, 3 // r
 201                                                                                                                                                  ));
 202                 SWORD s[8];
 203
 204                 for(todo>>=2;todo; todo--)
 205                 {
 206                         // Load constants
 207                         s[0] = srce[(index += increment) >> FRACBITS];
 208                         s[1] = srce[(index += increment) >> FRACBITS];
 209                         s[2] = srce[(index += increment) >> FRACBITS];
 210                         s[3] = srce[(index += increment) >> FRACBITS];
 211                         s[4] = 0;
 212
 213                         vector short int r1 = vec_ld(0, s);
 214                         vector signed short v1 = vec_perm(r1, r1, (vector unsigned char)(0*2, 0*2+1, // s0
 215                                                                                                                                                          4*2, 4*2+1, // 0
 216                                                                                                                                                          0*2, 0*2+1, // s0
 217                                                                                                                                                          4*2, 4*2+1, // 0
 218                                                                                                                                                          1*2, 1*2+1, // s1
 219                                                                                                                                                          4*2, 4*2+1, // 0
 220                                                                                                                                                          1*2, 1*2+1, // s1
 221                                                                                                                                                          4*2, 4*2+1  // 0
 222                                                                                                                                                          ));
 223
 224                         vector signed short v2 = vec_perm(r1, r1, (vector unsigned char)(2*2, 2*2+1, // s2
 225                                                                                                                                                          4*2, 4*2+1, // 0
 226                                                                                                                                                          2*2, 2*2+1, // s2
 227                                                                                                                                                          4*2, 4*2+1, // 0
 228                                                                                                                                                          3*2, 3*2+1, // s3
 229                                                                                                                                                          4*2, 4*2+1, // 0
 230                                                                                                                                                          3*2, 3*2+1, // s3
 231                                                                                                                                                          4*2, 4*2+1  // 0
 232                                                                                                                                                          ));
 233                         vector signed int v3 = vec_ld(0, dest);
 234                         vector signed int v4 = vec_ld(0, dest + 4);
 235                         vector signed int v5 = vec_mule(v0, v1);
 236                         vector signed int v6 = vec_mule(v0, v2);
 237
 238                         vec_st(vec_add(v3, v5), 0, dest);
 239                         vec_st(vec_add(v4, v6), 0x10, dest);
 240
 241                         dest+=8;
 242                 }
 243         }
 244 #endif // HAVE_ALTIVEC
 245
 246         // Remaining bits ...
 247         while(remain--) {
 248                 sample=srce[(index += increment) >> FRACBITS];
 249
 250                 *dest++ += vol[0] * sample;
 251                 *dest++ += vol[1] * sample;
 252         }
 253         return index;
 254 }
 255 #endif
 256
 257 /*========== 32 bit sample mixers - only for 32 bit platforms */
 258 #ifndef NATIVE_64BIT_INT
 259
 260 static SLONG Mix32MonoNormal(const SWORD* srce,SLONG* dest,SLONG index,SLONG increment,SLONG todo)
 261 {
 262 #if defined HAVE_ALTIVEC || defined HAVE_SSE2
 263     if (md_mode & DMODE_SIMDMIXER)
 264     {
 265                 return MixSIMDMonoNormal(srce, dest, index, increment, todo);
 266         }
 267         else
 268 #endif
 269         {
 270                 SWORD sample;
 271                 SLONG lvolsel = vnf->lvolsel;
 272
 273                 while(todo--) {
 274                         sample = srce[index >> FRACBITS];
 275                         index += increment;
 276
 277                         *dest++ += lvolsel * sample;
 278                 }
 279         }
 280         return index;
 281 }
 282
 283 // FIXME: This mixer should works also on 64-bit platform
 284 // Hint : changes SLONG / SLONGLONG mess with size_t
 285 static SLONG Mix32StereoNormal(const SWORD* srce,SLONG* dest,SLONG index,SLONG increment,SLONG todo)
 286 {
 287 #if defined HAVE_ALTIVEC || defined HAVE_SSE2
 288     if (md_mode & DMODE_SIMDMIXER)
 289     {
 290                 return MixSIMDStereoNormal(srce, dest, index, increment, todo);
 291         }
 292         else
 293 #endif
 294         {
 295                 SWORD sample;
 296                 SLONG lvolsel = vnf->lvolsel;
 297                 SLONG rvolsel = vnf->rvolsel;
 298
 299                 while(todo--) {
 300                         sample=srce[(index += increment) >> FRACBITS];
 301
 302                         *dest++ += lvolsel * sample;
 303                         *dest++ += rvolsel * sample;
 304                 }
 305         }
 306         return index;
 307 }
 308
 309
 310 static SLONG Mix32SurroundNormal(const SWORD* srce,SLONG* dest,SLONG index,SLONG increment,SLONG todo)
 311 {
 312         SWORD sample;
 313         SLONG lvolsel = vnf->lvolsel;
 314         SLONG rvolsel = vnf->rvolsel;
 315
 316         if (lvolsel>=rvolsel) {
 317                 while(todo--) {
 318                         sample = srce[index >> FRACBITS];
 319                         index += increment;
 320
 321                         *dest++ += lvolsel*sample;
 322                         *dest++ -= lvolsel*sample;
 323                 }
 324         } else {
 325                 while(todo--) {
 326                         sample = srce[index >> FRACBITS];
 327                         index += increment;
 328
 329                         *dest++ -= rvolsel*sample;
 330                         *dest++ += rvolsel*sample;
 331                 }
 332         }
 333         return index;
 334 }
 335
 336 static SLONG Mix32MonoInterp(const SWORD* srce,SLONG* dest,SLONG index,SLONG increment,SLONG todo)
 337 {
 338         SLONG sample;
 339         SLONG lvolsel = vnf->lvolsel;
 340         SLONG rampvol = vnf->rampvol;
 341
 342         if (rampvol) {
 343                 SLONG oldlvol = vnf->oldlvol - lvolsel;
 344                 while(todo--) {
 345                         sample=(SLONG)srce[index>>FRACBITS]+
 346                                ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 347                                 *(index&FRACMASK)>>FRACBITS);
 348                         index += increment;
 349
 350                         *dest++ += ((lvolsel << CLICK_SHIFT) + oldlvol * rampvol)
 351                                    * sample >> CLICK_SHIFT;
 352                         if (!--rampvol)
 353                                 break;
 354                 }
 355                 vnf->rampvol = rampvol;
 356                 if (todo < 0)
 357                         return index;
 358         }
 359
 360         while(todo--) {
 361                 sample=(SLONG)srce[index>>FRACBITS]+
 362                        ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 363                         *(index&FRACMASK)>>FRACBITS);
 364                 index += increment;
 365
 366                 *dest++ += lvolsel * sample;
 367         }
 368         return index;
 369 }
 370
 371 static SLONG Mix32StereoInterp(const SWORD* srce,SLONG* dest,SLONG index,SLONG increment,SLONG todo)
 372 {
 373         SLONG sample;
 374         SLONG lvolsel = vnf->lvolsel;
 375         SLONG rvolsel = vnf->rvolsel;
 376         SLONG rampvol = vnf->rampvol;
 377
 378         if (rampvol) {
 379                 SLONG oldlvol = vnf->oldlvol - lvolsel;
 380                 SLONG oldrvol = vnf->oldrvol - rvolsel;
 381                 while(todo--) {
 382                         sample=(SLONG)srce[index>>FRACBITS]+
 383                                ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 384                                 *(index&FRACMASK)>>FRACBITS);
 385                         index += increment;
 386
 387                         *dest++ += ((lvolsel << CLICK_SHIFT) + oldlvol * rampvol)
 388                                    * sample >> CLICK_SHIFT;
 389                         *dest++ += ((rvolsel << CLICK_SHIFT) + oldrvol * rampvol)
 390                                            * sample >> CLICK_SHIFT;
 391                         if (!--rampvol)
 392                                 break;
 393                 }
 394                 vnf->rampvol = rampvol;
 395                 if (todo < 0)
 396                         return index;
 397         }
 398
 399         while(todo--) {
 400                 sample=(SLONG)srce[index>>FRACBITS]+
 401                        ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 402                         *(index&FRACMASK)>>FRACBITS);
 403                 index += increment;
 404
 405                 *dest++ += lvolsel * sample;
 406                 *dest++ += rvolsel * sample;
 407         }
 408         return index;
 409 }
 410
 411 static SLONG Mix32SurroundInterp(const SWORD* srce,SLONG* dest,SLONG index,SLONG increment,SLONG todo)
 412 {
 413         SLONG sample;
 414         SLONG lvolsel = vnf->lvolsel;
 415         SLONG rvolsel = vnf->rvolsel;
 416         SLONG rampvol = vnf->rampvol;
 417         SLONG oldvol, vol;
 418
 419         if (lvolsel >= rvolsel) {
 420                 vol = lvolsel;
 421                 oldvol = vnf->oldlvol;
 422         } else {
 423                 vol = rvolsel;
 424                 oldvol = vnf->oldrvol;
 425         }
 426
 427         if (rampvol) {
 428                 oldvol -= vol;
 429                 while(todo--) {
 430                         sample=(SLONG)srce[index>>FRACBITS]+
 431                                ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 432                                 *(index&FRACMASK)>>FRACBITS);
 433                         index += increment;
 434
 435                         sample=((vol << CLICK_SHIFT) + oldvol * rampvol)
 436                                    * sample >> CLICK_SHIFT;
 437                         *dest++ += sample;
 438                         *dest++ -= sample;
 439
 440                         if (!--rampvol)
 441                                 break;
 442                 }
 443                 vnf->rampvol = rampvol;
 444                 if (todo < 0)
 445                         return index;
 446         }
 447
 448         while(todo--) {
 449                 sample=(SLONG)srce[index>>FRACBITS]+
 450                        ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 451                         *(index&FRACMASK)>>FRACBITS);
 452                 index += increment;
 453
 454                 *dest++ += vol*sample;
 455                 *dest++ -= vol*sample;
 456         }
 457         return index;
 458 }
 459 #endif
 460
 461 /*========== 64 bit sample mixers - all platforms */
 462
 463 static SLONGLONG MixMonoNormal(const SWORD* srce,SLONG* dest,SLONGLONG index,SLONGLONG increment,SLONG todo)
 464 {
 465         SWORD sample;
 466         SLONG lvolsel = vnf->lvolsel;
 467
 468         while(todo--) {
 469                 sample = srce[index >> FRACBITS];
 470                 index += increment;
 471
 472                 *dest++ += lvolsel * sample;
 473         }
 474         return index;
 475 }
 476
 477 static SLONGLONG MixStereoNormal(const SWORD* srce,SLONG* dest,SLONGLONG index,SLONGLONG increment,SLONG todo)
 478 {
 479         SWORD sample;
 480         SLONG lvolsel = vnf->lvolsel;
 481         SLONG rvolsel = vnf->rvolsel;
 482
 483         while(todo--) {
 484                 sample=srce[index >> FRACBITS];
 485                 index += increment;
 486
 487                 *dest++ += lvolsel * sample;
 488                 *dest++ += rvolsel * sample;
 489         }
 490         return index;
 491 }
 492
 493 static SLONGLONG MixSurroundNormal(const SWORD* srce,SLONG* dest,SLONGLONG index,SLONGLONG increment,SLONG todo)
 494 {
 495         SWORD sample;
 496         SLONG lvolsel = vnf->lvolsel;
 497         SLONG rvolsel = vnf->rvolsel;
 498
 499         if(vnf->lvolsel>=vnf->rvolsel) {
 500                 while(todo--) {
 501                         sample = srce[index >> FRACBITS];
 502                         index += increment;
 503
 504                         *dest++ += lvolsel*sample;
 505                         *dest++ -= lvolsel*sample;
 506                 }
 507         } else {
 508                 while(todo--) {
 509                         sample = srce[index >> FRACBITS];
 510                         index += increment;
 511
 512                         *dest++ -= rvolsel*sample;
 513                         *dest++ += rvolsel*sample;
 514                 }
 515         }
 516         return index;
 517 }
 518
 519 static SLONGLONG MixMonoInterp(const SWORD* srce,SLONG* dest,SLONGLONG index,SLONGLONG increment,SLONG todo)
 520 {
 521         SLONG sample;
 522         SLONG lvolsel = vnf->lvolsel;
 523         SLONG rampvol = vnf->rampvol;
 524
 525         if (rampvol) {
 526                 SLONG oldlvol = vnf->oldlvol - lvolsel;
 527                 while(todo--) {
 528                         sample=(SLONG)srce[index>>FRACBITS]+
 529                                ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 530                                 *(index&FRACMASK)>>FRACBITS);
 531                         index += increment;
 532
 533                         *dest++ += ((lvolsel << CLICK_SHIFT) + oldlvol * rampvol)
 534                                            * sample >> CLICK_SHIFT;
 535                         if (!--rampvol)
 536                                 break;
 537                 }
 538                 vnf->rampvol = rampvol;
 539                 if (todo < 0)
 540                         return index;
 541         }
 542
 543         while(todo--) {
 544                 sample=(SLONG)srce[index>>FRACBITS]+
 545                        ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 546                         *(index&FRACMASK)>>FRACBITS);
 547                 index += increment;
 548
 549                 *dest++ += lvolsel * sample;
 550         }
 551         return index;
 552 }
 553
 554 static SLONGLONG MixStereoInterp(const SWORD* srce,SLONG* dest,SLONGLONG index,SLONGLONG increment,SLONG todo)
 555 {
 556         SLONG sample;
 557         SLONG lvolsel = vnf->lvolsel;
 558         SLONG rvolsel = vnf->rvolsel;
 559         SLONG rampvol = vnf->rampvol;
 560
 561         if (rampvol) {
 562                 SLONG oldlvol = vnf->oldlvol - lvolsel;
 563                 SLONG oldrvol = vnf->oldrvol - rvolsel;
 564                 while(todo--) {
 565                         sample=(SLONG)srce[index>>FRACBITS]+
 566                                ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 567                                 *(index&FRACMASK)>>FRACBITS);
 568                         index += increment;
 569
 570                         *dest++ +=((lvolsel << CLICK_SHIFT) + oldlvol * rampvol)
 571                                            * sample >> CLICK_SHIFT;
 572                         *dest++ +=((rvolsel << CLICK_SHIFT) + oldrvol * rampvol)
 573                                            * sample >> CLICK_SHIFT;
 574                         if (!--rampvol)
 575                                 break;
 576                 }
 577                 vnf->rampvol = rampvol;
 578                 if (todo < 0)
 579                         return index;
 580         }
 581
 582         while(todo--) {
 583                 sample=(SLONG)srce[index>>FRACBITS]+
 584                        ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 585                         *(index&FRACMASK)>>FRACBITS);
 586                 index += increment;
 587
 588                 *dest++ += lvolsel * sample;
 589                 *dest++ += rvolsel * sample;
 590         }
 591         return index;
 592 }
 593
 594 static SLONGLONG MixSurroundInterp(const SWORD* srce,SLONG* dest,SLONGLONG index,SLONGLONG increment,SLONG todo)
 595 {
 596         SLONG sample;
 597         SLONG lvolsel = vnf->lvolsel;
 598         SLONG rvolsel = vnf->rvolsel;
 599         SLONG rampvol = vnf->rampvol;
 600         SLONG oldvol, vol;
 601
 602         if (lvolsel >= rvolsel) {
 603                 vol = lvolsel;
 604                 oldvol = vnf->oldlvol;
 605         } else {
 606                 vol = rvolsel;
 607                 oldvol = vnf->oldrvol;
 608         }
 609
 610         if (rampvol) {
 611                 oldvol -= vol;
 612                 while(todo--) {
 613                         sample=(SLONG)srce[index>>FRACBITS]+
 614                                ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 615                                 *(index&FRACMASK)>>FRACBITS);
 616                         index += increment;
 617
 618                         sample=((vol << CLICK_SHIFT) + oldvol * rampvol)
 619                                    * sample >> CLICK_SHIFT;
 620                         *dest++ += sample;
 621                         *dest++ -= sample;
 622                         if (!--rampvol)
 623                                 break;
 624                 }
 625                 vnf->rampvol = rampvol;
 626                 if (todo < 0)
 627                         return index;
 628         }
 629
 630         while(todo--) {
 631                 sample=(SLONG)srce[index>>FRACBITS]+
 632                        ((SLONG)(srce[(index>>FRACBITS)+1]-srce[index>>FRACBITS])
 633                         *(index&FRACMASK)>>FRACBITS);
 634                 index += increment;
 635
 636                 *dest++ += vol*sample;
 637                 *dest++ -= vol*sample;
 638         }
 639         return index;
 640 }
 641
 642 static void (*MixReverb)(SLONG* srce,NATIVE count);
 643
 644 /* Reverb macros */
 645 #define COMPUTE_LOC(n) loc##n = RVRindex % RVc##n
 646 #define COMPUTE_LECHO(n) RVbufL##n [loc##n ]=speedup+((ReverbPct*RVbufL##n [loc##n ])>>7)
 647 #define COMPUTE_RECHO(n) RVbufR##n [loc##n ]=speedup+((ReverbPct*RVbufR##n [loc##n ])>>7)
 648
 649 static void MixReverb_Normal(SLONG* srce,NATIVE count)
 650 {
 651         unsigned int speedup;
 652         int ReverbPct;
 653         unsigned int loc1,loc2,loc3,loc4;
 654         unsigned int loc5,loc6,loc7,loc8;
 655
 656         ReverbPct=58+(md_reverb<<2);
 657
 658         COMPUTE_LOC(1); COMPUTE_LOC(2); COMPUTE_LOC(3); COMPUTE_LOC(4);
 659         COMPUTE_LOC(5); COMPUTE_LOC(6); COMPUTE_LOC(7); COMPUTE_LOC(8);
 660
 661         while(count--) {
 662                 /* Compute the left channel echo buffers */
 663                 speedup = *srce >> 3;
 664
 665                 COMPUTE_LECHO(1); COMPUTE_LECHO(2); COMPUTE_LECHO(3); COMPUTE_LECHO(4);
 666                 COMPUTE_LECHO(5); COMPUTE_LECHO(6); COMPUTE_LECHO(7); COMPUTE_LECHO(8);
 667
 668                 /* Prepare to compute actual finalized data */
 669                 RVRindex++;
 670
 671                 COMPUTE_LOC(1); COMPUTE_LOC(2); COMPUTE_LOC(3); COMPUTE_LOC(4);
 672                 COMPUTE_LOC(5); COMPUTE_LOC(6); COMPUTE_LOC(7); COMPUTE_LOC(8);
 673
 674                 /* left channel */
 675                 *srce++ +=RVbufL1[loc1]-RVbufL2[loc2]+RVbufL3[loc3]-RVbufL4[loc4]+
 676                           RVbufL5[loc5]-RVbufL6[loc6]+RVbufL7[loc7]-RVbufL8[loc8];
 677         }
 678 }
 679
 680 static void MixReverb_Stereo(SLONG* srce,NATIVE count)
 681 {
 682         unsigned int speedup;
 683         int          ReverbPct;
 684         unsigned int loc1, loc2, loc3, loc4;
 685         unsigned int loc5, loc6, loc7, loc8;
 686
 687         ReverbPct = 92+(md_reverb<<1);
 688
 689         COMPUTE_LOC(1); COMPUTE_LOC(2); COMPUTE_LOC(3); COMPUTE_LOC(4);
 690         COMPUTE_LOC(5); COMPUTE_LOC(6); COMPUTE_LOC(7); COMPUTE_LOC(8);
 691
 692         while(count--) {
 693                 /* Compute the left channel echo buffers */
 694                 speedup = *srce >> 3;
 695
 696                 COMPUTE_LECHO(1); COMPUTE_LECHO(2); COMPUTE_LECHO(3); COMPUTE_LECHO(4);
 697                 COMPUTE_LECHO(5); COMPUTE_LECHO(6); COMPUTE_LECHO(7); COMPUTE_LECHO(8);
 698
 699                 /* Compute the right channel echo buffers */
 700                 speedup = srce[1] >> 3;
 701
 702                 COMPUTE_RECHO(1); COMPUTE_RECHO(2); COMPUTE_RECHO(3); COMPUTE_RECHO(4);
 703                 COMPUTE_RECHO(5); COMPUTE_RECHO(6); COMPUTE_RECHO(7); COMPUTE_RECHO(8);
 704
 705                 /* Prepare to compute actual finalized data */
 706                 RVRindex++;
 707
 708                 COMPUTE_LOC(1); COMPUTE_LOC(2); COMPUTE_LOC(3); COMPUTE_LOC(4);
 709                 COMPUTE_LOC(5); COMPUTE_LOC(6); COMPUTE_LOC(7); COMPUTE_LOC(8);
 710
 711                 /* left channel then right channel */
 712                 *srce++ +=RVbufL1[loc1]-RVbufL2[loc2]+RVbufL3[loc3]-RVbufL4[loc4]+
 713                           RVbufL5[loc5]-RVbufL6[loc6]+RVbufL7[loc7]-RVbufL8[loc8];
 714
 715                 *srce++ +=RVbufR1[loc1]-RVbufR2[loc2]+RVbufR3[loc3]-RVbufR4[loc4]+
 716                           RVbufR5[loc5]-RVbufR6[loc6]+RVbufR7[loc7]-RVbufR8[loc8];
 717         }
 718 }
 719
 720 static void (*MixLowPass)(SLONG* srce,NATIVE count);
 721
 722 static int nLeftNR, nRightNR;
 723
 724 static void MixLowPass_Stereo(SLONG* srce,NATIVE count)
 725 {
 726         int n1 = nLeftNR, n2 = nRightNR;
 727         SLONG *pnr = srce;
 728         int nr=count;
 729         for (; nr; nr--)
 730         {
 731                 int vnr = pnr[0] >> 1;
 732                 pnr[0] = vnr + n1;
 733                 n1 = vnr;
 734                 vnr = pnr[1] >> 1;
 735                 pnr[1] = vnr + n2;
 736                 n2 = vnr;
 737                 pnr += 2;
 738         }
 739         nLeftNR = n1;
 740         nRightNR = n2;
 741 }
 742
 743 static void MixLowPass_Normal(SLONG* srce,NATIVE count)
 744 {
 745         int n1 = nLeftNR;
 746         SLONG *pnr = srce;
 747         int nr=count;
 748         for (; nr; nr--)
 749         {
 750                 int vnr = pnr[0] >> 1;
 751                 pnr[0] = vnr + n1;
 752                 n1 = vnr;
 753                 pnr ++;
 754         }
 755         nLeftNR = n1;
 756 }
 757
 758 /* shifting fudge factor for FP scaling, should be 0 < FP_SHIFT < BITSHIFT */
 759 #define FP_SHIFT 4
 760
 761 /* Mixing macros */
 762 #define EXTRACT_SAMPLE_FP(var,size) var=(*srce++>>(BITSHIFT-size)) * ((1.0f / 32768.0f) / (1 << size))
 763 #define CHECK_SAMPLE_FP(var,bound) var=(var>bound)?bound:(var<-bound)?-bound:var
 764 #define PUT_SAMPLE_FP(var) *dste++=var
 765
 766 static void Mix32ToFP(float* dste,const SLONG *srce,NATIVE count)
 767 {
 768         float x1,x2,x3,x4;
 769         int     remain;
 770
 771         remain=count&3;
 772         for(count>>=2;count;count--) {
 773                 EXTRACT_SAMPLE_FP(x1,FP_SHIFT); EXTRACT_SAMPLE_FP(x2,FP_SHIFT);
 774                 EXTRACT_SAMPLE_FP(x3,FP_SHIFT); EXTRACT_SAMPLE_FP(x4,FP_SHIFT);
 775
 776                 CHECK_SAMPLE_FP(x1,1.0f); CHECK_SAMPLE_FP(x2,1.0f);
 777                 CHECK_SAMPLE_FP(x3,1.0f); CHECK_SAMPLE_FP(x4,1.0f);
 778
 779                 PUT_SAMPLE_FP(x1); PUT_SAMPLE_FP(x2);
 780                 PUT_SAMPLE_FP(x3); PUT_SAMPLE_FP(x4);
 781         }
 782         while(remain--) {
 783                 EXTRACT_SAMPLE_FP(x1,FP_SHIFT);
 784                 CHECK_SAMPLE_FP(x1,1.0f);
 785                 PUT_SAMPLE_FP(x1);
 786         }
 787 }
 788
 789
 790 /* Mixing macros */
 791 #define EXTRACT_SAMPLE(var,size) var=*srce++>>(BITSHIFT+16-size)
 792 #define CHECK_SAMPLE(var,bound) var=(var>=bound)?bound-1:(var<-bound)?-bound:var
 793 #define PUT_SAMPLE(var) *dste++=var
 794
 795 static void Mix32To16(SWORD* dste,const SLONG *srce,NATIVE count)
 796 {
 797         SLONG x1,x2,x3,x4;
 798         int     remain;
 799
 800         remain=count&3;
 801         for(count>>=2;count;count--) {
 802                 EXTRACT_SAMPLE(x1,16); EXTRACT_SAMPLE(x2,16);
 803                 EXTRACT_SAMPLE(x3,16); EXTRACT_SAMPLE(x4,16);
 804
 805                 CHECK_SAMPLE(x1,32768); CHECK_SAMPLE(x2,32768);
 806                 CHECK_SAMPLE(x3,32768); CHECK_SAMPLE(x4,32768);
 807
 808                 PUT_SAMPLE(x1); PUT_SAMPLE(x2); PUT_SAMPLE(x3); PUT_SAMPLE(x4);
 809         }
 810         while(remain--) {
 811                 EXTRACT_SAMPLE(x1,16);
 812                 CHECK_SAMPLE(x1,32768);
 813                 PUT_SAMPLE(x1);
 814         }
 815 }
 816
 817 static void Mix32To8(SBYTE* dste,const SLONG *srce,NATIVE count)
 818 {
 819         SWORD x1,x2,x3,x4;
 820         int     remain;
 821
 822         remain=count&3;
 823         for(count>>=2;count;count--) {
 824                 EXTRACT_SAMPLE(x1,8); EXTRACT_SAMPLE(x2,8);
 825                 EXTRACT_SAMPLE(x3,8); EXTRACT_SAMPLE(x4,8);
 826
 827                 CHECK_SAMPLE(x1,128); CHECK_SAMPLE(x2,128);
 828                 CHECK_SAMPLE(x3,128); CHECK_SAMPLE(x4,128);
 829
 830                 PUT_SAMPLE(x1+128); PUT_SAMPLE(x2+128);
 831                 PUT_SAMPLE(x3+128); PUT_SAMPLE(x4+128);
 832         }
 833         while(remain--) {
 834                 EXTRACT_SAMPLE(x1,8);
 835                 CHECK_SAMPLE(x1,128);
 836                 PUT_SAMPLE(x1+128);
 837         }
 838 }
 839
 840 #if defined HAVE_ALTIVEC || defined HAVE_SSE2
 841
 842 // Mix 32bit input to floating point. 32 samples per iteration
 843 // PC: ?, Mac OK
 844 static void Mix32ToFP_SIMD(float* dste,SLONG* srce,NATIVE count)
 845 {
 846         int     remain=count;
 847
 848         while(!IS_ALIGNED_16(dste) || !IS_ALIGNED_16(srce))
 849         {
 850                 float x1;
 851                 EXTRACT_SAMPLE_FP(x1,FP_SHIFT);
 852                 CHECK_SAMPLE_FP(x1,1.0f);
 853                 PUT_SAMPLE_FP(x1);
 854                 count--;
 855                 if (!count)
 856                 {
 857                         return;
 858                 }
 859         }
 860
 861         remain = count&7;
 862
 863         const float k = ((1.0f / 32768.0f) / (1 << FP_SHIFT));
 864         simd_m128 x1, x2;
 865         simd_m128 xk = LOAD_PS1_SIMD(&k); // Scale factor
 866
 867         for(count>>=3;count;count--) {
 868            EXTRACT_SAMPLE_SIMD_F(srce, x1, FP_SHIFT, xk);  // Load 4 samples
 869            EXTRACT_SAMPLE_SIMD_F(srce+4, x2, FP_SHIFT, xk);  // Load 4 samples
 870         PUT_SAMPLE_SIMD_F(dste, x1); // Store 4 samples
 871         PUT_SAMPLE_SIMD_F(dste+4, x2); // Store 4 samples
 872         srce+=8;
 873         dste+=8;
 874         }
 875
 876         if (remain&4) {
 877            EXTRACT_SAMPLE_SIMD_F(srce, x1, FP_SHIFT, xk);  // Load 4 samples
 878         PUT_SAMPLE_SIMD_F(dste, x1); // Store 4 samples
 879         srce+=4;
 880         dste+=4;
 881         remain &= 3;
 882         }
 883
 884         while(remain--) {
 885                 float x1;
 886                 EXTRACT_SAMPLE_FP(x1,FP_SHIFT);
 887                 CHECK_SAMPLE_FP(x1,1.0f);
 888                 PUT_SAMPLE_FP(x1);
 889         }
 890 }
 891 // PC: Ok, Mac Ok
 892 static void Mix32To16_SIMD(SWORD* dste,SLONG* srce,NATIVE count)
 893 {
 894         int     remain = count;
 895
 896         while(!IS_ALIGNED_16(dste) || !IS_ALIGNED_16(srce))
 897         {
 898                 SLONG x1;
 899                 EXTRACT_SAMPLE(x1,16);
 900                 CHECK_SAMPLE(x1,32768);
 901                 PUT_SAMPLE(x1);
 902                 count--;
 903                 if (!count)
 904                 {
 905                         return;
 906                 }
 907         }
 908
 909         remain = count&7;
 910
 911         for(count>>=3;count;count--)
 912         {
 913                 simd_m128i x1,x2;
 914                 EXTRACT_SAMPLE_SIMD_16(srce, x1);  // Load 4 samples
 915                 EXTRACT_SAMPLE_SIMD_16(srce+4, x2);  // Load 4 samples
 916                 PUT_SAMPLE_SIMD_W(dste, x1, x2);  // Store 8 samples
 917                 srce+=8;
 918                 dste+=8;
 919         }
 920
 921         if (remain)
 922            Mix32To16(dste, srce, remain);
 923 }
 924
 925 // Mix 32bit input to 8bit. 128 samples per iteration
 926 // PC:OK, Mac: Ok
 927 static void Mix32To8_SIMD(SBYTE* dste,SLONG* srce,NATIVE count)
 928 {
 929         int     remain=count;
 930
 931         while(!IS_ALIGNED_16(dste) || !IS_ALIGNED_16(srce))
 932         {
 933                 SWORD x1;
 934                 EXTRACT_SAMPLE(x1,8);
 935                 CHECK_SAMPLE(x1,128);
 936                 PUT_SAMPLE(x1+128);
 937                 count--;
 938                 if (!count)
 939                 {
 940                         return;
 941                 }
 942         }
 943
 944         remain = count&15;
 945
 946         for(count>>=4;count;count--) {
 947         simd_m128i x1,x2,x3,x4;
 948         EXTRACT_SAMPLE_SIMD_8(srce, x1);  // Load 4 samples
 949         EXTRACT_SAMPLE_SIMD_8(srce+4, x2);  // Load 4 samples
 950         EXTRACT_SAMPLE_SIMD_8(srce+8, x3);  // Load 4 samples
 951         EXTRACT_SAMPLE_SIMD_8(srce+12, x4);  // Load 4 samples
 952         PUT_SAMPLE_SIMD_B(dste, x1, x2, x3, x4); // Store 16 samples
 953         srce+=16;
 954         dste+=16;
 955         }
 956         if (remain)
 957            Mix32To8(dste, srce, remain);
 958 }
 959
 960 #endif
 961
 962
 963
 964 static void AddChannel(SLONG* ptr,NATIVE todo)
 965 {
 966         SLONGLONG end,done;
 967         SWORD *s;
 968
 969         if(!(s=Samples[vnf->handle])) {
 970                 vnf->current = vnf->active  = 0;
 971                 return;
 972         }
 973
 974         /* update the 'current' index so the sample loops, or stops playing if it
 975            reached the end of the sample */
 976         while(todo>0) {
 977                 SLONGLONG endpos;
 978
 979                 if(vnf->flags & SF_REVERSE) {
 980                         /* The sample is playing in reverse */
 981                         if((vnf->flags&SF_LOOP)&&(vnf->current<idxlpos)) {
 982                                 /* the sample is looping and has reached the loopstart index */
 983                                 if(vnf->flags & SF_BIDI) {
 984                                         /* sample is doing bidirectional loops, so 'bounce' the
 985                                            current index against the idxlpos */
 986                                         vnf->current = idxlpos+(idxlpos-vnf->current);
 987                                         vnf->flags &= ~SF_REVERSE;
 988                                         vnf->increment = -vnf->increment;
 989                                 } else
 990                                         /* normal backwards looping, so set the current position to
 991                                            loopend index */
 992                                         vnf->current=idxlend-(idxlpos-vnf->current);
 993                         } else {
 994                                 /* the sample is not looping, so check if it reached index 0 */
 995                                 if(vnf->current < 0) {
 996                                         /* playing index reached 0, so stop playing this sample */
 997                                         vnf->current = vnf->active  = 0;
 998                                         break;
 999                                 }
1000                         }
1001                 } else {
1002                         /* The sample is playing forward */
1003                         if((vnf->flags & SF_LOOP) &&
1004                            (vnf->current >= idxlend)) {
1005                                 /* the sample is looping, check the loopend index */
1006                                 if(vnf->flags & SF_BIDI) {
1007                                         /* sample is doing bidirectional loops, so 'bounce' the
1008                                            current index against the idxlend */
1009                                         vnf->flags |= SF_REVERSE;
1010                                         vnf->increment = -vnf->increment;
1011                                         vnf->current = idxlend-(vnf->current-idxlend);
1012                                 } else
1013                                         /* normal backwards looping, so set the current position
1014                                            to loopend index */
1015                                         vnf->current=idxlpos+(vnf->current-idxlend);
1016                         } else {
1017                                 /* sample is not looping, so check if it reached the last
1018                                    position */
1019                                 if(vnf->current >= idxsize) {
1020                                         /* yes, so stop playing this sample */
1021                                         vnf->current = vnf->active  = 0;
1022                                         break;
1023                                 }
1024                         }
1025                 }
1026
1027                 end=(vnf->flags&SF_REVERSE)?(vnf->flags&SF_LOOP)?idxlpos:0:
1028                      (vnf->flags&SF_LOOP)?idxlend:idxsize;
1029
1030                 /* if the sample is not blocked... */
1031                 if((end==vnf->current)||(!vnf->increment))
1032                         done=0;
1033                 else {
1034                         done=MIN((end-vnf->current)/vnf->increment+1,todo);
1035                         if(done<0) done=0;
1036                 }
1037
1038                 if(!done) {
1039                         vnf->active = 0;
1040                         break;
1041                 }
1042
1043                 endpos=vnf->current+done*vnf->increment;
1044
1045                 if(vnf->vol) {
1046 #ifndef NATIVE_64BIT_INT
1047                         /* use the 32 bit mixers as often as we can (they're much faster) */
1048                         if((vnf->current<0x7fffffff)&&(endpos<0x7fffffff)) {
1049                                 if((md_mode & DMODE_INTERP)) {
1050                                         if(vc_mode & DMODE_STEREO) {
1051                                                 if((vnf->pan==PAN_SURROUND)&&(md_mode&DMODE_SURROUND))
1052                                                         vnf->current=Mix32SurroundInterp
1053                                                                    (s,ptr,vnf->current,vnf->increment,done);
1054                                                 else
1055                                                         vnf->current=Mix32StereoInterp
1056                                                                    (s,ptr,vnf->current,vnf->increment,done);
1057                                         } else
1058                                                 vnf->current=Mix32MonoInterp
1059                                                                (s,ptr,vnf->current,vnf->increment,done);
1060                                 } else if(vc_mode & DMODE_STEREO) {
1061                                         if((vnf->pan==PAN_SURROUND)&&(md_mode&DMODE_SURROUND))
1062                                                 vnf->current=Mix32SurroundNormal
1063                                                                (s,ptr,vnf->current,vnf->increment,done);
1064                                         else
1065                                         {
1066 #if defined HAVE_ALTIVEC || defined HAVE_SSE2
1067                                         if (md_mode & DMODE_SIMDMIXER)
1068                                                 vnf->current=MixSIMDStereoNormal
1069                                                                (s,ptr,vnf->current,vnf->increment,done);
1070
1071                                         else
1072 #endif
1073                                                 vnf->current=Mix32StereoNormal
1074                                                                (s,ptr,vnf->current,vnf->increment,done);
1075                                         }
1076                                 } else
1077                                         vnf->current=Mix32MonoNormal
1078                                                            (s,ptr,vnf->current,vnf->increment,done);
1079                         } else
1080 #endif
1081                                {
1082                                 if((md_mode & DMODE_INTERP)) {
1083                                         if(vc_mode & DMODE_STEREO) {
1084                                                 if((vnf->pan==PAN_SURROUND)&&(md_mode&DMODE_SURROUND))
1085                                                         vnf->current=MixSurroundInterp
1086                                                                    (s,ptr,vnf->current,vnf->increment,done);
1087                                                 else
1088                                                         vnf->current=MixStereoInterp
1089                                                                    (s,ptr,vnf->current,vnf->increment,done);
1090                                         } else
1091                                                 vnf->current=MixMonoInterp
1092                                                                (s,ptr,vnf->current,vnf->increment,done);
1093                                 } else if(vc_mode & DMODE_STEREO) {
1094                                         if((vnf->pan==PAN_SURROUND)&&(md_mode&DMODE_SURROUND))
1095                                                 vnf->current=MixSurroundNormal
1096                                                                (s,ptr,vnf->current,vnf->increment,done);
1097                                         else
1098                                         {
1099 #if defined HAVE_ALTIVEC || defined HAVE_SSE2
1100                                         if (md_mode & DMODE_SIMDMIXER)
1101                                                 vnf->current=MixSIMDStereoNormal
1102                                                                (s,ptr,vnf->current,vnf->increment,done);
1103
1104                                         else
1105 #endif
1106                                                 vnf->current=MixStereoNormal
1107                                                                (s,ptr,vnf->current,vnf->increment,done);
1108                                         }
1109                                 } else
1110                                         vnf->current=MixMonoNormal
1111                                                            (s,ptr,vnf->current,vnf->increment,done);
1112                         }
1113                 } else
1114                         /* update sample position */
1115                         vnf->current=endpos;
1116
1117                 todo-=done;
1118                 ptr +=(vc_mode & DMODE_STEREO)?(done<<1):done;
1119         }
1120 }
1121
1122 #define _IN_VIRTCH_
1123 #include "virtch_common.c"
1124 #undef _IN_VIRTCH_
1125
1126 void VC1_WriteSamples(SBYTE* buf,ULONG todo)
1127 {
1128         int left,portion=0,count;
1129         SBYTE  *buffer;
1130         int t, pan, vol;
1131
1132         while(todo) {
1133                 if(!tickleft) {
1134                         if(vc_mode & DMODE_SOFT_MUSIC) md_player();
1135                         tickleft=(md_mixfreq*125L)/(md_bpm*50L);
1136                 }
1137                 left = MIN(tickleft, todo);
1138                 buffer    = buf;
1139                 tickleft -= left;
1140                 todo     -= left;
1141                 buf += samples2bytes(left);
1142
1143                 while(left) {
1144                         portion = MIN(left, samplesthatfit);
1145                         count   = (vc_mode & DMODE_STEREO)?(portion<<1):portion;
1146                         memset(vc_tickbuf, 0, count<<2);
1147                         for(t=0;t<vc_softchn;t++) {
1148                                 vnf = &vinf[t];
1149
1150                                 if(vnf->kick) {
1151                                         vnf->current=((SLONGLONG)vnf->start)<<FRACBITS;
1152                                         vnf->kick   =0;
1153                                         vnf->active =1;
1154                                 }
1155
1156                                 if(!vnf->frq) vnf->active = 0;
1157
1158                                 if(vnf->active) {
1159                                         vnf->increment=((SLONGLONG)(vnf->frq<<FRACBITS))/md_mixfreq;
1160                                         if(vnf->flags&SF_REVERSE) vnf->increment=-vnf->increment;
1161                                         vol = vnf->vol;  pan = vnf->pan;
1162
1163                                         vnf->oldlvol=vnf->lvolsel;vnf->oldrvol=vnf->rvolsel;
1164                                         if(vc_mode & DMODE_STEREO) {
1165                                                 if(pan != PAN_SURROUND) {
1166                                                         vnf->lvolsel=(vol*(PAN_RIGHT-pan))>>8;
1167                                                         vnf->rvolsel=(vol*pan)>>8;
1168                                                 } else
1169                                                         vnf->lvolsel=vnf->rvolsel=vol/2;
1170                                         } else
1171                                                 vnf->lvolsel=vol;
1172
1173                                         idxsize = (vnf->size)? ((SLONGLONG)vnf->size << FRACBITS)-1 : 0;
1174                                         idxlend = (vnf->repend)? ((SLONGLONG)vnf->repend << FRACBITS)-1 : 0;
1175                                         idxlpos = (SLONGLONG)vnf->reppos << FRACBITS;
1176                                         AddChannel(vc_tickbuf, portion);
1177                                 }
1178                         }
1179
1180                         if(md_mode & DMODE_NOISEREDUCTION) {
1181                                 MixLowPass(vc_tickbuf, portion);
1182                         }
1183
1184                         if(md_reverb) {
1185                                 if(md_reverb>15) md_reverb=15;
1186                                 MixReverb(vc_tickbuf, portion);
1187                         }
1188
1189                         if (vc_callback) {
1190                                 vc_callback((unsigned char*)vc_tickbuf, portion);
1191                         }
1192
1193
1194 #if defined HAVE_ALTIVEC || defined HAVE_SSE2
1195                         if (md_mode & DMODE_SIMDMIXER)
1196                         {
1197                                 if(vc_mode & DMODE_FLOAT)
1198                                         Mix32ToFP_SIMD((float*) buffer, vc_tickbuf, count);
1199                                 else if(vc_mode & DMODE_16BITS)
1200                                         Mix32To16_SIMD((SWORD*) buffer, vc_tickbuf, count);
1201                                 else
1202                                         Mix32To8_SIMD((SBYTE*) buffer, vc_tickbuf, count);
1203                         }
1204                         else
1205 #endif
1206                         {
1207                                 if(vc_mode & DMODE_FLOAT)
1208                                         Mix32ToFP((float*) buffer, vc_tickbuf, count);
1209                                 else if(vc_mode & DMODE_16BITS)
1210                                         Mix32To16((SWORD*) buffer, vc_tickbuf, count);
1211                                 else
1212                                         Mix32To8((SBYTE*) buffer, vc_tickbuf, count);
1213                         }
1214                         buffer += samples2bytes(portion);
1215                         left   -= portion;
1216                 }
1217         }
1218 }
1219
1220 int VC1_Init(void)
1221 {
1222         VC_SetupPointers();
1223
1224         //if (md_mode&DMODE_HQMIXER)
1225         //      return VC2_Init();
1226
1227         if(!(Samples=(SWORD**)MikMod_calloc(MAXSAMPLEHANDLES,sizeof(SWORD*)))) {
1228                 _mm_errno = MMERR_INITIALIZING_MIXER;
1229                 return 1;
1230         }
1231         if(!vc_tickbuf)
1232                 if(!(vc_tickbuf=(SLONG*)MikMod_malloc((TICKLSIZE+32)*sizeof(SLONG)))) {
1233                         _mm_errno = MMERR_INITIALIZING_MIXER;
1234                         return 1;
1235                 }
1236
1237         MixReverb=(md_mode&DMODE_STEREO)?MixReverb_Stereo:MixReverb_Normal;
1238         MixLowPass=(md_mode&DMODE_STEREO)?MixLowPass_Stereo:MixLowPass_Normal;
1239         vc_mode = md_mode;
1240         return 0;
1241 }
1242
1243 int VC1_PlayStart(void)
1244 {
1245         samplesthatfit=TICKLSIZE;
1246         if(vc_mode & DMODE_STEREO) samplesthatfit >>= 1;
1247         tickleft = 0;
1248
1249         RVc1 = (5000L * md_mixfreq) / REVERBERATION;
1250         RVc2 = (5078L * md_mixfreq) / REVERBERATION;
1251         RVc3 = (5313L * md_mixfreq) / REVERBERATION;
1252         RVc4 = (5703L * md_mixfreq) / REVERBERATION;
1253         RVc5 = (6250L * md_mixfreq) / REVERBERATION;
1254         RVc6 = (6953L * md_mixfreq) / REVERBERATION;
1255         RVc7 = (7813L * md_mixfreq) / REVERBERATION;
1256         RVc8 = (8828L * md_mixfreq) / REVERBERATION;
1257
1258         if(!(RVbufL1=(SLONG*)MikMod_calloc((RVc1+1),sizeof(SLONG)))) return 1;
1259         if(!(RVbufL2=(SLONG*)MikMod_calloc((RVc2+1),sizeof(SLONG)))) return 1;
1260         if(!(RVbufL3=(SLONG*)MikMod_calloc((RVc3+1),sizeof(SLONG)))) return 1;
1261         if(!(RVbufL4=(SLONG*)MikMod_calloc((RVc4+1),sizeof(SLONG)))) return 1;
1262         if(!(RVbufL5=(SLONG*)MikMod_calloc((RVc5+1),sizeof(SLONG)))) return 1;
1263         if(!(RVbufL6=(SLONG*)MikMod_calloc((RVc6+1),sizeof(SLONG)))) return 1;
1264         if(!(RVbufL7=(SLONG*)MikMod_calloc((RVc7+1),sizeof(SLONG)))) return 1;
1265         if(!(RVbufL8=(SLONG*)MikMod_calloc((RVc8+1),sizeof(SLONG)))) return 1;
1266
1267         if(!(RVbufR1=(SLONG*)MikMod_calloc((RVc1+1),sizeof(SLONG)))) return 1;
1268         if(!(RVbufR2=(SLONG*)MikMod_calloc((RVc2+1),sizeof(SLONG)))) return 1;
1269         if(!(RVbufR3=(SLONG*)MikMod_calloc((RVc3+1),sizeof(SLONG)))) return 1;
1270         if(!(RVbufR4=(SLONG*)MikMod_calloc((RVc4+1),sizeof(SLONG)))) return 1;
1271         if(!(RVbufR5=(SLONG*)MikMod_calloc((RVc5+1),sizeof(SLONG)))) return 1;
1272         if(!(RVbufR6=(SLONG*)MikMod_calloc((RVc6+1),sizeof(SLONG)))) return 1;
1273         if(!(RVbufR7=(SLONG*)MikMod_calloc((RVc7+1),sizeof(SLONG)))) return 1;
1274         if(!(RVbufR8=(SLONG*)MikMod_calloc((RVc8+1),sizeof(SLONG)))) return 1;
1275
1276         RVRindex = 0;
1277         return 0;
1278 }
1279
1280 void VC1_PlayStop(void)
1281 {
1282         if(RVbufL1) MikMod_free(RVbufL1);
1283         if(RVbufL2) MikMod_free(RVbufL2);
1284         if(RVbufL3) MikMod_free(RVbufL3);
1285         if(RVbufL4) MikMod_free(RVbufL4);
1286         if(RVbufL5) MikMod_free(RVbufL5);
1287         if(RVbufL6) MikMod_free(RVbufL6);
1288         if(RVbufL7) MikMod_free(RVbufL7);
1289         if(RVbufL8) MikMod_free(RVbufL8);
1290         RVbufL1=RVbufL2=RVbufL3=RVbufL4=RVbufL5=RVbufL6=RVbufL7=RVbufL8=NULL;
1291         if(RVbufR1) MikMod_free(RVbufR1);
1292         if(RVbufR2) MikMod_free(RVbufR2);
1293         if(RVbufR3) MikMod_free(RVbufR3);
1294         if(RVbufR4) MikMod_free(RVbufR4);
1295         if(RVbufR5) MikMod_free(RVbufR5);
1296         if(RVbufR6) MikMod_free(RVbufR6);
1297         if(RVbufR7) MikMod_free(RVbufR7);
1298         if(RVbufR8) MikMod_free(RVbufR8);
1299         RVbufR1=RVbufR2=RVbufR3=RVbufR4=RVbufR5=RVbufR6=RVbufR7=RVbufR8=NULL;
1300 }
1301
1302 int VC1_SetNumVoices(void)
1303 {
1304         int t;
1305
1306         if(!(vc_softchn=md_softchn)) return 0;
1307
1308         if(vinf) MikMod_free(vinf);
1309         if(!(vinf= MikMod_calloc(sizeof(VINFO),vc_softchn))) return 1;
1310
1311         for(t=0;t<vc_softchn;t++) {
1312                 vinf[t].frq=10000;
1313                 vinf[t].pan=(t&1)?PAN_LEFT:PAN_RIGHT;
1314         }
1315
1316         return 0;
1317 }
1318
1319 /* ex:set ts=4: */