plugins/dfsound/xa.c

   1 /***************************************************************************
   2                             xa.c  -  description
   3                              -------------------
   4     begin                : Wed May 15 2002
   5     copyright            : (C) 2002 by Pete Bernert
   6     email                : BlackDove@addcom.de
   7  ***************************************************************************/
   8 /***************************************************************************
   9  *                                                                         *
  10  *   This program is free software; you can redistribute it and/or modify  *
  11  *   it under the terms of the GNU General Public License as published by  *
  12  *   the Free Software Foundation; either version 2 of the License, or     *
  13  *   (at your option) any later version. See also the license.txt file for *
  14  *   additional informations.                                              *
  15  *                                                                         *
  16  ***************************************************************************/
  17
  18 #include "stdafx.h"
  19 #define _IN_XA
  20 #include <stdint.h>
  21
  22 // will be included from spu.c
  23 #ifdef _IN_SPU
  24
  25 ////////////////////////////////////////////////////////////////////////
  26 // XA GLOBALS
  27 ////////////////////////////////////////////////////////////////////////
  28
  29 static int gauss_ptr = 0;
  30 static int gauss_window[8] = {0, 0, 0, 0, 0, 0, 0, 0};
  31
  32 #define gvall0 gauss_window[gauss_ptr]
  33 #define gvall(x) gauss_window[(gauss_ptr+x)&3]
  34 #define gvalr0 gauss_window[4+gauss_ptr]
  35 #define gvalr(x) gauss_window[4+((gauss_ptr+x)&3)]
  36
  37 ////////////////////////////////////////////////////////////////////////
  38 // MIX XA & CDDA
  39 ////////////////////////////////////////////////////////////////////////
  40
  41 INLINE void MixXA(int ns_to, int decode_pos)
  42 {
  43  int cursor = decode_pos;
  44  int ns;
  45  short l, r;
  46  uint32_t v;
  47
  48  if(spu.XAPlay != spu.XAFeed || spu.XARepeat > 0)
  49  {
  50   if(spu.XAPlay == spu.XAFeed)
  51    spu.XARepeat--;
  52
  53   v = spu.XALastVal;
  54   for(ns = 0; ns < ns_to*2; )
  55    {
  56     if(spu.XAPlay != spu.XAFeed) v=*spu.XAPlay++;
  57     if(spu.XAPlay == spu.XAEnd) spu.XAPlay=spu.XAStart;
  58
  59     l = ((int)(short)v * spu.iLeftXAVol) >> 15;
  60     r = ((int)(short)(v >> 16) * spu.iLeftXAVol) >> 15;
  61     SSumLR[ns++] += l;
  62     SSumLR[ns++] += r;
  63
  64     spu.spuMem[cursor] = v;
  65     spu.spuMem[cursor + 0x400/2] = v >> 16;
  66     cursor = (cursor + 1) & 0x1ff;
  67    }
  68   spu.XALastVal = v;
  69  }
  70
  71  for(ns = 0; ns < ns_to * 2 && spu.CDDAPlay!=spu.CDDAFeed && (spu.CDDAPlay!=spu.CDDAEnd-1||spu.CDDAFeed!=spu.CDDAStart);)
  72   {
  73    v=*spu.CDDAPlay++;
  74    if(spu.CDDAPlay==spu.CDDAEnd) spu.CDDAPlay=spu.CDDAStart;
  75
  76    l = ((int)(short)v * spu.iLeftXAVol) >> 15;
  77    r = ((int)(short)(v >> 16) * spu.iLeftXAVol) >> 15;
  78    SSumLR[ns++] += l;
  79    SSumLR[ns++] += r;
  80
  81    spu.spuMem[cursor] = v;
  82    spu.spuMem[cursor + 0x400/2] = v >> 16;
  83    cursor = (cursor + 1) & 0x1ff;
  84   }
  85 }
  86
  87 ////////////////////////////////////////////////////////////////////////
  88 // small linux time helper... only used for watchdog
  89 ////////////////////////////////////////////////////////////////////////
  90
  91 static unsigned long timeGetTime_spu()
  92 {
  93 #ifdef _WIN32
  94  return GetTickCount();
  95 #else
  96  struct timeval tv;
  97  gettimeofday(&tv, 0);                                 // well, maybe there are better ways
  98  return tv.tv_sec * 1000 + tv.tv_usec/1000;            // to do that, but at least it works
  99 #endif
 100 }
 101
 102 ////////////////////////////////////////////////////////////////////////
 103 // FEED XA
 104 ////////////////////////////////////////////////////////////////////////
 105
 106 INLINE void FeedXA(xa_decode_t *xap)
 107 {
 108  int sinc,spos,i,iSize,iPlace,vl,vr;
 109
 110  if(!spu.bSPUIsOpen) return;
 111
 112  spu.xapGlobal = xap;                                  // store info for save states
 113  spu.XARepeat  = 100;                                  // set up repeat
 114
 115 #if 0//def XA_HACK
 116  iSize=((45500*xap->nsamples)/xap->freq);              // get size
 117 #else
 118  iSize=((44100*xap->nsamples)/xap->freq);              // get size
 119 #endif
 120  if(!iSize) return;                                    // none? bye
 121
 122  if(spu.XAFeed<spu.XAPlay) iPlace=spu.XAPlay-spu.XAFeed; // how much space in my buf?
 123  else              iPlace=(spu.XAEnd-spu.XAFeed) + (spu.XAPlay-spu.XAStart);
 124
 125  if(iPlace==0) return;                                 // no place at all
 126
 127  //----------------------------------------------------//
 128  if(spu_config.iXAPitch)                               // pitch change option?
 129   {
 130    static DWORD dwLT=0;
 131    static DWORD dwFPS=0;
 132    static int   iFPSCnt=0;
 133    static int   iLastSize=0;
 134    static DWORD dwL1=0;
 135    DWORD dw=timeGetTime_spu(),dw1,dw2;
 136
 137    iPlace=iSize;
 138
 139    dwFPS+=dw-dwLT;iFPSCnt++;
 140
 141    dwLT=dw;
 142
 143    if(iFPSCnt>=10)
 144     {
 145      if(!dwFPS) dwFPS=1;
 146      dw1=1000000/dwFPS;
 147      if(dw1>=(dwL1-100) && dw1<=(dwL1+100)) dw1=dwL1;
 148      else dwL1=dw1;
 149      dw2=(xap->freq*100/xap->nsamples);
 150      if((!dw1)||((dw2+100)>=dw1)) iLastSize=0;
 151      else
 152       {
 153        iLastSize=iSize*dw2/dw1;
 154        if(iLastSize>iPlace) iLastSize=iPlace;
 155        iSize=iLastSize;
 156       }
 157      iFPSCnt=0;dwFPS=0;
 158     }
 159    else
 160     {
 161      if(iLastSize) iSize=iLastSize;
 162     }
 163   }
 164  //----------------------------------------------------//
 165
 166  spos=0x10000L;
 167  sinc = (xap->nsamples << 16) / iSize;                 // calc freq by num / size
 168
 169  if(xap->stereo)
 170 {
 171    uint32_t * pS=(uint32_t *)xap->pcm;
 172    uint32_t l=0;
 173
 174    if(spu_config.iXAPitch)
 175     {
 176      int32_t l1,l2;short s;
 177      for(i=0;i<iSize;i++)
 178       {
 179        if(spu_config.iUseInterpolation==2)
 180         {
 181          while(spos>=0x10000L)
 182           {
 183            l = *pS++;
 184            gauss_window[gauss_ptr] = (short)LOWORD(l);
 185            gauss_window[4+gauss_ptr] = (short)HIWORD(l);
 186            gauss_ptr = (gauss_ptr+1) & 3;
 187            spos -= 0x10000L;
 188           }
 189          vl = (spos >> 6) & ~3;
 190          vr=(gauss[vl]*gvall0)&~2047;
 191          vr+=(gauss[vl+1]*gvall(1))&~2047;
 192          vr+=(gauss[vl+2]*gvall(2))&~2047;
 193          vr+=(gauss[vl+3]*gvall(3))&~2047;
 194          l= (vr >> 11) & 0xffff;
 195          vr=(gauss[vl]*gvalr0)&~2047;
 196          vr+=(gauss[vl+1]*gvalr(1))&~2047;
 197          vr+=(gauss[vl+2]*gvalr(2))&~2047;
 198          vr+=(gauss[vl+3]*gvalr(3))&~2047;
 199          l |= vr << 5;
 200         }
 201        else
 202         {
 203          while(spos>=0x10000L)
 204           {
 205            l = *pS++;
 206            spos -= 0x10000L;
 207           }
 208         }
 209
 210        s=(short)LOWORD(l);
 211        l1=s;
 212        l1=(l1*iPlace)/iSize;
 213        ssat32_to_16(l1);
 214        s=(short)HIWORD(l);
 215        l2=s;
 216        l2=(l2*iPlace)/iSize;
 217        ssat32_to_16(l2);
 218        l=(l1&0xffff)|(l2<<16);
 219
 220        *spu.XAFeed++=l;
 221
 222        if(spu.XAFeed==spu.XAEnd) spu.XAFeed=spu.XAStart;
 223        if(spu.XAFeed==spu.XAPlay)
 224         {
 225          if(spu.XAPlay!=spu.XAStart) spu.XAFeed=spu.XAPlay-1;
 226          break;
 227         }
 228
 229        spos += sinc;
 230       }
 231     }
 232    else
 233     {
 234      for(i=0;i<iSize;i++)
 235       {
 236        if(spu_config.iUseInterpolation==2)
 237         {
 238          while(spos>=0x10000L)
 239           {
 240            l = *pS++;
 241            gauss_window[gauss_ptr] = (short)LOWORD(l);
 242            gauss_window[4+gauss_ptr] = (short)HIWORD(l);
 243            gauss_ptr = (gauss_ptr+1) & 3;
 244            spos -= 0x10000L;
 245           }
 246          vl = (spos >> 6) & ~3;
 247          vr=(gauss[vl]*gvall0)&~2047;
 248          vr+=(gauss[vl+1]*gvall(1))&~2047;
 249          vr+=(gauss[vl+2]*gvall(2))&~2047;
 250          vr+=(gauss[vl+3]*gvall(3))&~2047;
 251          l= (vr >> 11) & 0xffff;
 252          vr=(gauss[vl]*gvalr0)&~2047;
 253          vr+=(gauss[vl+1]*gvalr(1))&~2047;
 254          vr+=(gauss[vl+2]*gvalr(2))&~2047;
 255          vr+=(gauss[vl+3]*gvalr(3))&~2047;
 256          l |= vr << 5;
 257         }
 258        else
 259         {
 260          while(spos>=0x10000L)
 261           {
 262            l = *pS++;
 263            spos -= 0x10000L;
 264           }
 265         }
 266
 267        *spu.XAFeed++=l;
 268
 269        if(spu.XAFeed==spu.XAEnd) spu.XAFeed=spu.XAStart;
 270        if(spu.XAFeed==spu.XAPlay)
 271         {
 272          if(spu.XAPlay!=spu.XAStart) spu.XAFeed=spu.XAPlay-1;
 273          break;
 274         }
 275
 276        spos += sinc;
 277       }
 278     }
 279   }
 280  else
 281   {
 282    unsigned short * pS=(unsigned short *)xap->pcm;
 283    uint32_t l;short s=0;
 284
 285    if(spu_config.iXAPitch)
 286     {
 287      int32_t l1;
 288      for(i=0;i<iSize;i++)
 289       {
 290        if(spu_config.iUseInterpolation==2)
 291         {
 292          while(spos>=0x10000L)
 293           {
 294            gauss_window[gauss_ptr] = (short)*pS++;
 295            gauss_ptr = (gauss_ptr+1) & 3;
 296            spos -= 0x10000L;
 297           }
 298          vl = (spos >> 6) & ~3;
 299          vr=(gauss[vl]*gvall0)&~2047;
 300          vr+=(gauss[vl+1]*gvall(1))&~2047;
 301          vr+=(gauss[vl+2]*gvall(2))&~2047;
 302          vr+=(gauss[vl+3]*gvall(3))&~2047;
 303          l1=s= vr >> 11;
 304          l1 &= 0xffff;
 305         }
 306        else
 307         {
 308          while(spos>=0x10000L)
 309           {
 310            s = *pS++;
 311            spos -= 0x10000L;
 312           }
 313          l1=s;
 314         }
 315
 316        l1=(l1*iPlace)/iSize;
 317        ssat32_to_16(l1);
 318        l=(l1&0xffff)|(l1<<16);
 319        *spu.XAFeed++=l;
 320
 321        if(spu.XAFeed==spu.XAEnd) spu.XAFeed=spu.XAStart;
 322        if(spu.XAFeed==spu.XAPlay)
 323         {
 324          if(spu.XAPlay!=spu.XAStart) spu.XAFeed=spu.XAPlay-1;
 325          break;
 326         }
 327
 328        spos += sinc;
 329       }
 330     }
 331    else
 332     {
 333      for(i=0;i<iSize;i++)
 334       {
 335        if(spu_config.iUseInterpolation==2)
 336         {
 337          while(spos>=0x10000L)
 338           {
 339            gauss_window[gauss_ptr] = (short)*pS++;
 340            gauss_ptr = (gauss_ptr+1) & 3;
 341            spos -= 0x10000L;
 342           }
 343          vl = (spos >> 6) & ~3;
 344          vr=(gauss[vl]*gvall0)&~2047;
 345          vr+=(gauss[vl+1]*gvall(1))&~2047;
 346          vr+=(gauss[vl+2]*gvall(2))&~2047;
 347          vr+=(gauss[vl+3]*gvall(3))&~2047;
 348          l=s= vr >> 11;
 349         }
 350        else
 351         {
 352          while(spos>=0x10000L)
 353           {
 354            s = *pS++;
 355            spos -= 0x10000L;
 356           }
 357          l=s;
 358         }
 359
 360        l &= 0xffff;
 361        *spu.XAFeed++=(l|(l<<16));
 362
 363        if(spu.XAFeed==spu.XAEnd) spu.XAFeed=spu.XAStart;
 364        if(spu.XAFeed==spu.XAPlay)
 365         {
 366          if(spu.XAPlay!=spu.XAStart) spu.XAFeed=spu.XAPlay-1;
 367          break;
 368         }
 369
 370        spos += sinc;
 371       }
 372     }
 373   }
 374 }
 375
 376 ////////////////////////////////////////////////////////////////////////
 377 // FEED CDDA
 378 ////////////////////////////////////////////////////////////////////////
 379
 380 INLINE int FeedCDDA(unsigned char *pcm, int nBytes)
 381 {
 382  int space;
 383  space=(spu.CDDAPlay-spu.CDDAFeed-1)*4 & (CDDA_BUFFER_SIZE - 1);
 384  if(space<nBytes)
 385   return 0x7761; // rearmed_wait
 386
 387  while(nBytes>0)
 388   {
 389    if(spu.CDDAFeed==spu.CDDAEnd) spu.CDDAFeed=spu.CDDAStart;
 390    space=(spu.CDDAPlay-spu.CDDAFeed-1)*4 & (CDDA_BUFFER_SIZE - 1);
 391    if(spu.CDDAFeed+space/4>spu.CDDAEnd)
 392     space=(spu.CDDAEnd-spu.CDDAFeed)*4;
 393    if(space>nBytes)
 394     space=nBytes;
 395
 396    memcpy(spu.CDDAFeed,pcm,space);
 397    spu.CDDAFeed+=space/4;
 398    nBytes-=space;
 399    pcm+=space;
 400   }
 401
 402  return 0x676f; // rearmed_go
 403 }
 404
 405 #endif