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   1 /*                      DirectSound
   2  *
   3  * Copyright 1998 Marcus Meissner
   4  * Copyright 1998 Rob Riggs
   5  * Copyright 2000-2002 TransGaming Technologies, Inc.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "config.h"
  23 #include <assert.h>
  24 #include <stdio.h>
  25 #include <sys/types.h>
  26 #include <sys/fcntl.h>
  27 #ifdef HAVE_UNISTD_H
  28 # include <unistd.h>
  29 #endif
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <math.h>       /* Insomnia - pow() function */
  33
  34 #include "windef.h"
  35 #include "winbase.h"
  36 #include "wingdi.h"
  37 #include "winuser.h"
  38 #include "winerror.h"
  39 #include "mmsystem.h"
  40 #include "winternl.h"
  41 #include "mmddk.h"
  42 #include "wine/windef16.h"
  43 #include "wine/debug.h"
  44 #include "dsound.h"
  45 #include "dsdriver.h"
  46 #include "dsound_private.h"
  47
  48 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
  49
  50 void DSOUND_RecalcVolPan(PDSVOLUMEPAN volpan)
  51 {
  52         double temp;
  53
  54         /* the AmpFactors are expressed in 16.16 fixed point */
  55         volpan->dwVolAmpFactor = (ULONG) (pow(2.0, volpan->lVolume / 600.0) * 65536);
  56         /* FIXME: dwPan{Left|Right}AmpFactor */
  57
  58         /* FIXME: use calculated vol and pan ampfactors */
  59         temp = (double) (volpan->lVolume - (volpan->lPan > 0 ? volpan->lPan : 0));
  60         volpan->dwTotalLeftAmpFactor = (ULONG) (pow(2.0, temp / 600.0) * 65536);
  61         temp = (double) (volpan->lVolume + (volpan->lPan < 0 ? volpan->lPan : 0));
  62         volpan->dwTotalRightAmpFactor = (ULONG) (pow(2.0, temp / 600.0) * 65536);
  63
  64         TRACE("left = %lx, right = %lx\n", volpan->dwTotalLeftAmpFactor, volpan->dwTotalRightAmpFactor);
  65 }
  66
  67 void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb)
  68 {
  69         DWORD sw;
  70
  71         sw = dsb->wfx.nChannels * (dsb->wfx.wBitsPerSample / 8);
  72         /* calculate the 10ms write lead */
  73         dsb->writelead = (dsb->freq / 100) * sw;
  74 }
  75
  76 void DSOUND_CheckEvent(IDirectSoundBufferImpl *dsb, int len)
  77 {
  78         int                     i;
  79         DWORD                   offset;
  80         LPDSBPOSITIONNOTIFY     event;
  81
  82         if (!dsb->notify || dsb->notify->nrofnotifies == 0)
  83                 return;
  84
  85         TRACE("(%p) buflen = %ld, playpos = %ld, len = %d\n",
  86                 dsb, dsb->buflen, dsb->playpos, len);
  87         for (i = 0; i < dsb->notify->nrofnotifies ; i++) {
  88                 event = dsb->notify->notifies + i;
  89                 offset = event->dwOffset;
  90                 TRACE("checking %d, position %ld, event = %p\n",
  91                         i, offset, event->hEventNotify);
  92                 /* DSBPN_OFFSETSTOP has to be the last element. So this is */
  93                 /* OK. [Inside DirectX, p274] */
  94                 /*  */
  95                 /* This also means we can't sort the entries by offset, */
  96                 /* because DSBPN_OFFSETSTOP == -1 */
  97                 if (offset == DSBPN_OFFSETSTOP) {
  98                         if (dsb->state == STATE_STOPPED) {
  99                                 SetEvent(event->hEventNotify);
 100                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 101                                 return;
 102                         } else
 103                                 return;
 104                 }
 105                 if ((dsb->playpos + len) >= dsb->buflen) {
 106                         if ((offset < ((dsb->playpos + len) % dsb->buflen)) ||
 107                             (offset >= dsb->playpos)) {
 108                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 109                                 SetEvent(event->hEventNotify);
 110                         }
 111                 } else {
 112                         if ((offset >= dsb->playpos) && (offset < (dsb->playpos + len))) {
 113                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 114                                 SetEvent(event->hEventNotify);
 115                         }
 116                 }
 117         }
 118 }
 119
 120 /* WAV format info can be found at:
 121  *
 122  *    http://www.cwi.nl/ftp/audio/AudioFormats.part2
 123  *    ftp://ftp.cwi.nl/pub/audio/RIFF-format
 124  *
 125  * Import points to remember:
 126  *    8-bit WAV is unsigned
 127  *    16-bit WAV is signed
 128  */
 129  /* Use the same formulas as pcmconverter.c */
 130 static inline INT16 cvtU8toS16(BYTE b)
 131 {
 132     return (short)((b+(b << 8))-32768);
 133 }
 134
 135 static inline BYTE cvtS16toU8(INT16 s)
 136 {
 137     return (s >> 8) ^ (unsigned char)0x80;
 138 }
 139
 140 static inline void cp_fields(const IDirectSoundBufferImpl *dsb, BYTE *ibuf, BYTE *obuf )
 141 {
 142         INT fl,fr;
 143
 144         if (dsb->wfx.wBitsPerSample == 8)  {
 145                 if (dsound->wfx.wBitsPerSample == 8 &&
 146                     dsound->wfx.nChannels == dsb->wfx.nChannels) {
 147                         /* avoid needless 8->16->8 conversion */
 148                         *obuf=*ibuf;
 149                         if (dsb->wfx.nChannels==2)
 150                                 *(obuf+1)=*(ibuf+1);
 151                         return;
 152                 }
 153                 fl = cvtU8toS16(*ibuf);
 154                 fr = (dsb->wfx.nChannels==2 ? cvtU8toS16(*(ibuf + 1)) : fl);
 155         } else {
 156                 fl = *((INT16 *)ibuf);
 157                 fr = (dsb->wfx.nChannels==2 ? *(((INT16 *)ibuf) + 1)  : fl);
 158         }
 159
 160         if (dsound->wfx.nChannels == 2) {
 161                 if (dsound->wfx.wBitsPerSample == 8) {
 162                         *obuf = cvtS16toU8(fl);
 163                         *(obuf + 1) = cvtS16toU8(fr);
 164                         return;
 165                 }
 166                 if (dsound->wfx.wBitsPerSample == 16) {
 167                         *((INT16 *)obuf) = fl;
 168                         *(((INT16 *)obuf) + 1) = fr;
 169                         return;
 170                 }
 171         }
 172         if (dsound->wfx.nChannels == 1) {
 173                 fl = (fl + fr) >> 1;
 174                 if (dsound->wfx.wBitsPerSample == 8) {
 175                         *obuf = cvtS16toU8(fl);
 176                         return;
 177                 }
 178                 if (dsound->wfx.wBitsPerSample == 16) {
 179                         *((INT16 *)obuf) = fl;
 180                         return;
 181                 }
 182         }
 183 }
 184
 185 /* Now with PerfectPitch (tm) technology */
 186 static INT DSOUND_MixerNorm(IDirectSoundBufferImpl *dsb, BYTE *buf, INT len)
 187 {
 188         INT     i, size, ipos, ilen;
 189         BYTE    *ibp, *obp;
 190         INT     iAdvance = dsb->wfx.nBlockAlign;
 191         INT     oAdvance = dsb->dsound->wfx.nBlockAlign;
 192
 193         ibp = dsb->buffer + dsb->buf_mixpos;
 194         obp = buf;
 195
 196         TRACE("(%p, %p, %p), buf_mixpos=%ld\n", dsb, ibp, obp, dsb->buf_mixpos);
 197         /* Check for the best case */
 198         if ((dsb->freq == dsb->dsound->wfx.nSamplesPerSec) &&
 199             (dsb->wfx.wBitsPerSample == dsb->dsound->wfx.wBitsPerSample) &&
 200             (dsb->wfx.nChannels == dsb->dsound->wfx.nChannels)) {
 201                 DWORD bytesleft = dsb->buflen - dsb->buf_mixpos;
 202                 TRACE("(%p) Best case\n", dsb);
 203                 if (len <= bytesleft )
 204                         memcpy(obp, ibp, len);
 205                 else { /* wrap */
 206                         memcpy(obp, ibp, bytesleft );
 207                         memcpy(obp + bytesleft, dsb->buffer, len - bytesleft);
 208                 }
 209                 return len;
 210         }
 211
 212         /* Check for same sample rate */
 213         if (dsb->freq == dsb->dsound->wfx.nSamplesPerSec) {
 214                 TRACE("(%p) Same sample rate %ld = primary %ld\n", dsb,
 215                         dsb->freq, dsb->dsound->wfx.nSamplesPerSec);
 216                 ilen = 0;
 217                 for (i = 0; i < len; i += oAdvance) {
 218                         cp_fields(dsb, ibp, obp );
 219                         ibp += iAdvance;
 220                         ilen += iAdvance;
 221                         obp += oAdvance;
 222                         if (ibp >= (BYTE *)(dsb->buffer + dsb->buflen))
 223                                 ibp = dsb->buffer;      /* wrap */
 224                 }
 225                 return (ilen);
 226         }
 227
 228         /* Mix in different sample rates */
 229         /* */
 230         /* New PerfectPitch(tm) Technology (c) 1998 Rob Riggs */
 231         /* Patent Pending :-] */
 232
 233         /* Patent enhancements (c) 2000 Ove Kåven,
 234          * TransGaming Technologies Inc. */
 235
 236         /* FIXME("(%p) Adjusting frequency: %ld -> %ld (need optimization)\n",
 237            dsb, dsb->freq, dsb->dsound->wfx.nSamplesPerSec); */
 238
 239         size = len / oAdvance;
 240         ilen = 0;
 241         ipos = dsb->buf_mixpos;
 242         for (i = 0; i < size; i++) {
 243                 cp_fields(dsb, (dsb->buffer + ipos), obp);
 244                 obp += oAdvance;
 245                 dsb->freqAcc += dsb->freqAdjust;
 246                 if (dsb->freqAcc >= (1<<DSOUND_FREQSHIFT)) {
 247                         ULONG adv = (dsb->freqAcc>>DSOUND_FREQSHIFT) * iAdvance;
 248                         dsb->freqAcc &= (1<<DSOUND_FREQSHIFT)-1;
 249                         ipos += adv; ilen += adv;
 250                         while (ipos >= dsb->buflen)
 251                                 ipos -= dsb->buflen;
 252                 }
 253         }
 254         return ilen;
 255 }
 256
 257 static void DSOUND_MixerVol(IDirectSoundBufferImpl *dsb, BYTE *buf, INT len)
 258 {
 259         INT     i;
 260         BYTE    *bpc = buf;
 261         INT16   *bps = (INT16 *) buf;
 262
 263         TRACE("(%p,%p,%d)\n",dsb,buf,len);
 264         TRACE("left = %lx, right = %lx\n", dsb->cvolpan.dwTotalLeftAmpFactor,
 265                 dsb->cvolpan.dwTotalRightAmpFactor);
 266
 267         if ((!(dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) || (dsb->cvolpan.lPan == 0)) &&
 268             (!(dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) || (dsb->cvolpan.lVolume == 0)) &&
 269             !(dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
 270                 return;         /* Nothing to do */
 271
 272         /* If we end up with some bozo coder using panning or 3D sound */
 273         /* with a mono primary buffer, it could sound very weird using */
 274         /* this method. Oh well, tough patooties. */
 275
 276         switch (dsb->dsound->wfx.wBitsPerSample) {
 277         case 8:
 278                 /* 8-bit WAV is unsigned, but we need to operate */
 279                 /* on signed data for this to work properly */
 280                 switch (dsb->dsound->wfx.nChannels) {
 281                 case 1:
 282                         for (i = 0; i < len; i++) {
 283                                 INT val = *bpc - 128;
 284                                 val = (val * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 285                                 *bpc = val + 128;
 286                                 bpc++;
 287                         }
 288                         break;
 289                 case 2:
 290                         for (i = 0; i < len; i+=2) {
 291                                 INT val = *bpc - 128;
 292                                 val = (val * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 293                                 *bpc++ = val + 128;
 294                                 val = *bpc - 128;
 295                                 val = (val * dsb->cvolpan.dwTotalRightAmpFactor) >> 16;
 296                                 *bpc = val + 128;
 297                                 bpc++;
 298                         }
 299                         break;
 300                 default:
 301                         FIXME("doesn't support %d channels\n", dsb->dsound->wfx.nChannels);
 302                         break;
 303                 }
 304                 break;
 305         case 16:
 306                 /* 16-bit WAV is signed -- much better */
 307                 switch (dsb->dsound->wfx.nChannels) {
 308                 case 1:
 309                         for (i = 0; i < len; i += 2) {
 310                                 *bps = (*bps * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 311                                 bps++;
 312                         }
 313                         break;
 314                 case 2:
 315                         for (i = 0; i < len; i += 4) {
 316                                 *bps = (*bps * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 317                                 bps++;
 318                                 *bps = (*bps * dsb->cvolpan.dwTotalRightAmpFactor) >> 16;
 319                                 bps++;
 320                         }
 321                         break;
 322                 default:
 323                         FIXME("doesn't support %d channels\n", dsb->dsound->wfx.nChannels);
 324                         break;
 325                 }
 326                 break;
 327         default:
 328                 FIXME("doesn't support %d bit samples\n", dsb->dsound->wfx.wBitsPerSample);
 329                 break;
 330         }
 331 }
 332
 333 static void *tmp_buffer;
 334 static size_t tmp_buffer_len = 0;
 335
 336 static void *DSOUND_tmpbuffer(size_t len)
 337 {
 338   if (len>tmp_buffer_len) {
 339     void *new_buffer = realloc(tmp_buffer, len);
 340     if (new_buffer) {
 341       tmp_buffer = new_buffer;
 342       tmp_buffer_len = len;
 343     }
 344     return new_buffer;
 345   }
 346   return tmp_buffer;
 347 }
 348
 349 static DWORD DSOUND_MixInBuffer(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD fraglen)
 350 {
 351         INT     i, len, ilen, temp, field, nBlockAlign;
 352         INT     advance = dsb->dsound->wfx.wBitsPerSample >> 3;
 353         BYTE    *buf, *ibuf, *obuf;
 354         INT16   *ibufs, *obufs;
 355
 356         TRACE("%p,%ld,%ld)\n",dsb,writepos,fraglen);
 357
 358         len = fraglen;
 359         if (!(dsb->playflags & DSBPLAY_LOOPING)) {
 360                 temp = MulDiv(dsb->dsound->wfx.nAvgBytesPerSec, dsb->buflen,
 361                         dsb->nAvgBytesPerSec) -
 362                        MulDiv(dsb->dsound->wfx.nAvgBytesPerSec, dsb->buf_mixpos,
 363                         dsb->nAvgBytesPerSec);
 364                 len = (len > temp) ? temp : len;
 365         }
 366         nBlockAlign = dsb->dsound->wfx.nBlockAlign;
 367         len = len / nBlockAlign * nBlockAlign;  /* data alignment */
 368
 369         if (len == 0) {
 370                 /* This should only happen if we aren't looping and temp < nBlockAlign */
 371                 return 0;
 372         }
 373
 374         /* Been seeing segfaults in malloc() for some reason... */
 375         TRACE("allocating buffer (size = %d)\n", len);
 376         if ((buf = ibuf = (BYTE *) DSOUND_tmpbuffer(len)) == NULL)
 377                 return 0;
 378
 379         TRACE("MixInBuffer (%p) len = %d, dest = %ld\n", dsb, len, writepos);
 380
 381         ilen = DSOUND_MixerNorm(dsb, ibuf, len);
 382         if ((dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) ||
 383             (dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME))
 384                 DSOUND_MixerVol(dsb, ibuf, len);
 385
 386         obuf = dsb->dsound->buffer + writepos;
 387         for (i = 0; i < len; i += advance) {
 388                 obufs = (INT16 *) obuf;
 389                 ibufs = (INT16 *) ibuf;
 390                 if (dsb->dsound->wfx.wBitsPerSample == 8) {
 391                         /* 8-bit WAV is unsigned */
 392                         field = (*ibuf - 128);
 393                         field += (*obuf - 128);
 394                         field = field > 127 ? 127 : field;
 395                         field = field < -128 ? -128 : field;
 396                         *obuf = field + 128;
 397                 } else {
 398                         /* 16-bit WAV is signed */
 399                         field = *ibufs;
 400                         field += *obufs;
 401                         field = field > 32767 ? 32767 : field;
 402                         field = field < -32768 ? -32768 : field;
 403                         *obufs = field;
 404                 }
 405                 ibuf += advance;
 406                 obuf += advance;
 407                 if (obuf >= (BYTE *)(dsb->dsound->buffer + dsb->dsound->buflen))
 408                         obuf = dsb->dsound->buffer;
 409         }
 410         /* free(buf); */
 411
 412         if (dsb->leadin && (dsb->startpos > dsb->buf_mixpos) && (dsb->startpos <= dsb->buf_mixpos + ilen)) {
 413                 /* HACK... leadin should be reset when the PLAY position reaches the startpos,
 414                  * not the MIX position... but if the sound buffer is bigger than our prebuffering
 415                  * (which must be the case for the streaming buffers that need this hack anyway)
 416                  * plus DS_HEL_MARGIN or equivalent, then this ought to work anyway. */
 417                 dsb->leadin = FALSE;
 418         }
 419
 420         dsb->buf_mixpos += ilen;
 421
 422         if (dsb->buf_mixpos >= dsb->buflen) {
 423                 if (dsb->playflags & DSBPLAY_LOOPING) {
 424                         /* wrap */
 425                         while (dsb->buf_mixpos >= dsb->buflen)
 426                                 dsb->buf_mixpos -= dsb->buflen;
 427                         if (dsb->leadin && (dsb->startpos <= dsb->buf_mixpos))
 428                                 dsb->leadin = FALSE; /* HACK: see above */
 429                 }
 430         }
 431
 432         return len;
 433 }
 434
 435 static void DSOUND_PhaseCancel(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD len)
 436 {
 437         INT     i, ilen, field, nBlockAlign;
 438         INT     advance = dsb->dsound->wfx.wBitsPerSample >> 3;
 439         BYTE    *buf, *ibuf, *obuf;
 440         INT16   *ibufs, *obufs;
 441
 442         nBlockAlign = dsb->dsound->wfx.nBlockAlign;
 443         len = len / nBlockAlign * nBlockAlign;  /* data alignment */
 444
 445         TRACE("allocating buffer (size = %ld)\n", len);
 446         if ((buf = ibuf = (BYTE *) DSOUND_tmpbuffer(len)) == NULL)
 447                 return;
 448
 449         TRACE("PhaseCancel (%p) len = %ld, dest = %ld\n", dsb, len, writepos);
 450
 451         ilen = DSOUND_MixerNorm(dsb, ibuf, len);
 452         if ((dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) ||
 453             (dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME))
 454                 DSOUND_MixerVol(dsb, ibuf, len);
 455
 456         /* subtract instead of add, to phase out premixed data */
 457         obuf = dsb->dsound->buffer + writepos;
 458         for (i = 0; i < len; i += advance) {
 459                 obufs = (INT16 *) obuf;
 460                 ibufs = (INT16 *) ibuf;
 461                 if (dsb->dsound->wfx.wBitsPerSample == 8) {
 462                         /* 8-bit WAV is unsigned */
 463                         field = (*ibuf - 128);
 464                         field -= (*obuf - 128);
 465                         field = field > 127 ? 127 : field;
 466                         field = field < -128 ? -128 : field;
 467                         *obuf = field + 128;
 468                 } else {
 469                         /* 16-bit WAV is signed */
 470                         field = *ibufs;
 471                         field -= *obufs;
 472                         field = field > 32767 ? 32767 : field;
 473                         field = field < -32768 ? -32768 : field;
 474                         *obufs = field;
 475                 }
 476                 ibuf += advance;
 477                 obuf += advance;
 478                 if (obuf >= (BYTE *)(dsb->dsound->buffer + dsb->dsound->buflen))
 479                         obuf = dsb->dsound->buffer;
 480         }
 481         /* free(buf); */
 482 }
 483
 484 static void DSOUND_MixCancel(IDirectSoundBufferImpl *dsb, DWORD writepos, BOOL cancel)
 485 {
 486         DWORD   size, flen, len, npos, nlen;
 487         INT     iAdvance = dsb->wfx.nBlockAlign;
 488         INT     oAdvance = dsb->dsound->wfx.nBlockAlign;
 489         /* determine amount of premixed data to cancel */
 490         DWORD primary_done =
 491                 ((dsb->primary_mixpos < writepos) ? dsb->dsound->buflen : 0) +
 492                 dsb->primary_mixpos - writepos;
 493
 494         TRACE("(%p, %ld), buf_mixpos=%ld\n", dsb, writepos, dsb->buf_mixpos);
 495
 496         /* backtrack the mix position */
 497         size = primary_done / oAdvance;
 498         flen = size * dsb->freqAdjust;
 499         len = (flen >> DSOUND_FREQSHIFT) * iAdvance;
 500         flen &= (1<<DSOUND_FREQSHIFT)-1;
 501         while (dsb->freqAcc < flen) {
 502                 len += iAdvance;
 503                 dsb->freqAcc += 1<<DSOUND_FREQSHIFT;
 504         }
 505         len %= dsb->buflen;
 506         npos = ((dsb->buf_mixpos < len) ? dsb->buflen : 0) +
 507                 dsb->buf_mixpos - len;
 508         if (dsb->leadin && (dsb->startpos > npos) && (dsb->startpos <= npos + len)) {
 509                 /* stop backtracking at startpos */
 510                 npos = dsb->startpos;
 511                 len = ((dsb->buf_mixpos < npos) ? dsb->buflen : 0) +
 512                         dsb->buf_mixpos - npos;
 513                 flen = dsb->freqAcc;
 514                 nlen = len / dsb->wfx.nBlockAlign;
 515                 nlen = ((nlen << DSOUND_FREQSHIFT) + flen) / dsb->freqAdjust;
 516                 nlen *= dsb->dsound->wfx.nBlockAlign;
 517                 writepos =
 518                         ((dsb->primary_mixpos < nlen) ? dsb->dsound->buflen : 0) +
 519                         dsb->primary_mixpos - nlen;
 520         }
 521
 522         dsb->freqAcc -= flen;
 523         dsb->buf_mixpos = npos;
 524         dsb->primary_mixpos = writepos;
 525
 526         TRACE("new buf_mixpos=%ld, primary_mixpos=%ld (len=%ld)\n",
 527               dsb->buf_mixpos, dsb->primary_mixpos, len);
 528
 529         if (cancel) DSOUND_PhaseCancel(dsb, writepos, len);
 530 }
 531
 532 void DSOUND_MixCancelAt(IDirectSoundBufferImpl *dsb, DWORD buf_writepos)
 533 {
 534 #if 0
 535         DWORD   i, size, flen, len, npos, nlen;
 536         INT     iAdvance = dsb->wfx.nBlockAlign;
 537         INT     oAdvance = dsb->dsound->wfx.nBlockAlign;
 538         /* determine amount of premixed data to cancel */
 539         DWORD buf_done =
 540                 ((dsb->buf_mixpos < buf_writepos) ? dsb->buflen : 0) +
 541                 dsb->buf_mixpos - buf_writepos;
 542 #endif
 543
 544         WARN("(%p, %ld), buf_mixpos=%ld\n", dsb, buf_writepos, dsb->buf_mixpos);
 545         /* since this is not implemented yet, just cancel *ALL* prebuffering for now
 546          * (which is faster anyway when there's only a single secondary buffer) */
 547         dsb->dsound->need_remix = TRUE;
 548 }
 549
 550 void DSOUND_ForceRemix(IDirectSoundBufferImpl *dsb)
 551 {
 552         EnterCriticalSection(&dsb->lock);
 553         if (dsb->state == STATE_PLAYING) {
 554 #if 0 /* this may not be quite reliable yet */
 555                 dsb->need_remix = TRUE;
 556 #else
 557                 dsb->dsound->need_remix = TRUE;
 558 #endif
 559         }
 560         LeaveCriticalSection(&dsb->lock);
 561 }
 562
 563 static DWORD DSOUND_MixOne(IDirectSoundBufferImpl *dsb, DWORD playpos, DWORD writepos, DWORD mixlen)
 564 {
 565         DWORD len, slen;
 566         /* determine this buffer's write position */
 567         DWORD buf_writepos = DSOUND_CalcPlayPosition(dsb, dsb->state & dsb->dsound->state, writepos,
 568                                                      writepos, dsb->primary_mixpos, dsb->buf_mixpos);
 569         /* determine how much already-mixed data exists */
 570         DWORD buf_done =
 571                 ((dsb->buf_mixpos < buf_writepos) ? dsb->buflen : 0) +
 572                 dsb->buf_mixpos - buf_writepos;
 573         DWORD primary_done =
 574                 ((dsb->primary_mixpos < writepos) ? dsb->dsound->buflen : 0) +
 575                 dsb->primary_mixpos - writepos;
 576         DWORD adv_done =
 577                 ((dsb->dsound->mixpos < writepos) ? dsb->dsound->buflen : 0) +
 578                 dsb->dsound->mixpos - writepos;
 579         DWORD played =
 580                 ((buf_writepos < dsb->playpos) ? dsb->buflen : 0) +
 581                 buf_writepos - dsb->playpos;
 582         DWORD buf_left = dsb->buflen - buf_writepos;
 583         int still_behind;
 584
 585         TRACE("buf_writepos=%ld, primary_writepos=%ld\n", buf_writepos, writepos);
 586         TRACE("buf_done=%ld, primary_done=%ld\n", buf_done, primary_done);
 587         TRACE("buf_mixpos=%ld, primary_mixpos=%ld, mixlen=%ld\n", dsb->buf_mixpos, dsb->primary_mixpos,
 588               mixlen);
 589         TRACE("looping=%ld, startpos=%ld, leadin=%ld\n", dsb->playflags, dsb->startpos, dsb->leadin);
 590
 591         /* check for notification positions */
 592         if (dsb->dsbd.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY &&
 593             dsb->state != STATE_STARTING) {
 594                 DSOUND_CheckEvent(dsb, played);
 595         }
 596
 597         /* save write position for non-GETCURRENTPOSITION2... */
 598         dsb->playpos = buf_writepos;
 599
 600         /* check whether CalcPlayPosition detected a mixing underrun */
 601         if ((buf_done == 0) && (dsb->primary_mixpos != writepos)) {
 602                 /* it did, but did we have more to play? */
 603                 if ((dsb->playflags & DSBPLAY_LOOPING) ||
 604                     (dsb->buf_mixpos < dsb->buflen)) {
 605                         /* yes, have to recover */
 606                         ERR("underrun on sound buffer %p\n", dsb);
 607                         TRACE("recovering from underrun: primary_mixpos=%ld\n", writepos);
 608                 }
 609                 dsb->primary_mixpos = writepos;
 610                 primary_done = 0;
 611         }
 612         /* determine how far ahead we should mix */
 613         if (((dsb->playflags & DSBPLAY_LOOPING) ||
 614              (dsb->leadin && (dsb->probably_valid_to != 0))) &&
 615             !(dsb->dsbd.dwFlags & DSBCAPS_STATIC)) {
 616                 /* if this is a streaming buffer, it typically means that
 617                  * we should defer mixing past probably_valid_to as long
 618                  * as we can, to avoid unnecessary remixing */
 619                 /* the heavy-looking calculations shouldn't be that bad,
 620                  * as any game isn't likely to be have more than 1 or 2
 621                  * streaming buffers in use at any time anyway... */
 622                 DWORD probably_valid_left =
 623                         (dsb->probably_valid_to == (DWORD)-1) ? dsb->buflen :
 624                         ((dsb->probably_valid_to < buf_writepos) ? dsb->buflen : 0) +
 625                         dsb->probably_valid_to - buf_writepos;
 626                 /* check for leadin condition */
 627                 if ((probably_valid_left == 0) &&
 628                     (dsb->probably_valid_to == dsb->startpos) &&
 629                     dsb->leadin)
 630                         probably_valid_left = dsb->buflen;
 631                 TRACE("streaming buffer probably_valid_to=%ld, probably_valid_left=%ld\n",
 632                       dsb->probably_valid_to, probably_valid_left);
 633                 /* check whether the app's time is already up */
 634                 if (probably_valid_left < dsb->writelead) {
 635                         WARN("probably_valid_to now within writelead, possible streaming underrun\n");
 636                         /* once we pass the point of no return,
 637                          * no reason to hold back anymore */
 638                         dsb->probably_valid_to = (DWORD)-1;
 639                         /* we just have to go ahead and mix what we have,
 640                          * there's no telling what the app is thinking anyway */
 641                 } else {
 642                         /* adjust for our frequency and our sample size */
 643                         probably_valid_left = MulDiv(probably_valid_left,
 644                                                      1 << DSOUND_FREQSHIFT,
 645                                                      dsb->wfx.nBlockAlign * dsb->freqAdjust) *
 646                                               dsb->dsound->wfx.nBlockAlign;
 647                         /* check whether to clip mix_len */
 648                         if (probably_valid_left < mixlen) {
 649                                 TRACE("clipping to probably_valid_left=%ld\n", probably_valid_left);
 650                                 mixlen = probably_valid_left;
 651                         }
 652                 }
 653         }
 654         /* cut mixlen with what's already been mixed */
 655         if (mixlen < primary_done) {
 656                 /* huh? and still CalcPlayPosition didn't
 657                  * detect an underrun? */
 658                 FIXME("problem with underrun detection (mixlen=%ld < primary_done=%ld)\n", mixlen, primary_done);
 659                 return 0;
 660         }
 661         len = mixlen - primary_done;
 662         TRACE("remaining mixlen=%ld\n", len);
 663
 664         if (len < dsb->dsound->fraglen) {
 665                 /* smaller than a fragment, wait until it gets larger
 666                  * before we take the mixing overhead */
 667                 TRACE("mixlen not worth it, deferring mixing\n");
 668                 still_behind = 1;
 669                 goto post_mix;
 670         }
 671
 672         /* ok, we know how much to mix, let's go */
 673         still_behind = (adv_done > primary_done);
 674         while (len) {
 675                 slen = dsb->dsound->buflen - dsb->primary_mixpos;
 676                 if (slen > len) slen = len;
 677                 slen = DSOUND_MixInBuffer(dsb, dsb->primary_mixpos, slen);
 678
 679                 if ((dsb->primary_mixpos < dsb->dsound->mixpos) &&
 680                     (dsb->primary_mixpos + slen >= dsb->dsound->mixpos))
 681                         still_behind = FALSE;
 682
 683                 dsb->primary_mixpos += slen; len -= slen;
 684                 while (dsb->primary_mixpos >= dsb->dsound->buflen)
 685                         dsb->primary_mixpos -= dsb->dsound->buflen;
 686
 687                 if ((dsb->state == STATE_STOPPED) || !slen) break;
 688         }
 689         TRACE("new primary_mixpos=%ld, primary_advbase=%ld\n", dsb->primary_mixpos, dsb->dsound->mixpos);
 690         TRACE("mixed data len=%ld, still_behind=%d\n", mixlen-len, still_behind);
 691
 692 post_mix:
 693         /* check if buffer should be considered complete */
 694         if (buf_left < dsb->writelead &&
 695             !(dsb->playflags & DSBPLAY_LOOPING)) {
 696                 dsb->state = STATE_STOPPED;
 697                 dsb->playpos = 0;
 698                 dsb->last_playpos = 0;
 699                 dsb->buf_mixpos = 0;
 700                 dsb->leadin = FALSE;
 701                 DSOUND_CheckEvent(dsb, buf_left);
 702         }
 703
 704         /* return how far we think the primary buffer can
 705          * advance its underrun detector...*/
 706         if (still_behind) return 0;
 707         if ((mixlen - len) < primary_done) return 0;
 708         slen = ((dsb->primary_mixpos < dsb->dsound->mixpos) ?
 709                 dsb->dsound->buflen : 0) + dsb->primary_mixpos -
 710                 dsb->dsound->mixpos;
 711         if (slen > mixlen) {
 712                 /* the primary_done and still_behind checks above should have worked */
 713                 FIXME("problem with advancement calculation (advlen=%ld > mixlen=%ld)\n", slen, mixlen);
 714                 slen = 0;
 715         }
 716         return slen;
 717 }
 718
 719 static DWORD DSOUND_MixToPrimary(DWORD playpos, DWORD writepos, DWORD mixlen, BOOL recover)
 720 {
 721         INT                     i, len, maxlen = 0;
 722         IDirectSoundBufferImpl  *dsb;
 723
 724         TRACE("(%ld,%ld,%ld)\n", playpos, writepos, mixlen);
 725         for (i = dsound->nrofbuffers - 1; i >= 0; i--) {
 726                 dsb = dsound->buffers[i];
 727
 728                 if (!dsb || !dsb->lpVtbl)
 729                         continue;
 730                 if (dsb->buflen && dsb->state && !dsb->hwbuf) {
 731                         TRACE("Checking %p, mixlen=%ld\n", dsb, mixlen);
 732                         EnterCriticalSection(&(dsb->lock));
 733                         if (dsb->state == STATE_STOPPING) {
 734                                 DSOUND_MixCancel(dsb, writepos, TRUE);
 735                                 dsb->state = STATE_STOPPED;
 736                                 DSOUND_CheckEvent(dsb, 0);
 737                         } else {
 738                                 if ((dsb->state == STATE_STARTING) || recover) {
 739                                         dsb->primary_mixpos = writepos;
 740                                         memcpy(&dsb->cvolpan, &dsb->volpan, sizeof(dsb->cvolpan));
 741                                         dsb->need_remix = FALSE;
 742                                 }
 743                                 else if (dsb->need_remix) {
 744                                         DSOUND_MixCancel(dsb, writepos, TRUE);
 745                                         memcpy(&dsb->cvolpan, &dsb->volpan, sizeof(dsb->cvolpan));
 746                                         dsb->need_remix = FALSE;
 747                                 }
 748                                 len = DSOUND_MixOne(dsb, playpos, writepos, mixlen);
 749                                 if (dsb->state == STATE_STARTING)
 750                                         dsb->state = STATE_PLAYING;
 751                                 maxlen = (len > maxlen) ? len : maxlen;
 752                         }
 753                         LeaveCriticalSection(&(dsb->lock));
 754                 }
 755         }
 756
 757         return maxlen;
 758 }
 759
 760 static void DSOUND_MixReset(DWORD writepos)
 761 {
 762         INT                     i;
 763         IDirectSoundBufferImpl  *dsb;
 764         int nfiller;
 765
 766         TRACE("(%ld)\n", writepos);
 767
 768         /* the sound of silence */
 769         nfiller = dsound->wfx.wBitsPerSample == 8 ? 128 : 0;
 770
 771         /* reset all buffer mix positions */
 772         for (i = dsound->nrofbuffers - 1; i >= 0; i--) {
 773                 dsb = dsound->buffers[i];
 774
 775                 if (!dsb || !dsb->lpVtbl)
 776                         continue;
 777                 if (dsb->buflen && dsb->state && !dsb->hwbuf) {
 778                         TRACE("Resetting %p\n", dsb);
 779                         EnterCriticalSection(&(dsb->lock));
 780                         if (dsb->state == STATE_STOPPING) {
 781                                 dsb->state = STATE_STOPPED;
 782                         }
 783                         else if (dsb->state == STATE_STARTING) {
 784                                 /* nothing */
 785                         } else {
 786                                 DSOUND_MixCancel(dsb, writepos, FALSE);
 787                                 memcpy(&dsb->cvolpan, &dsb->volpan, sizeof(dsb->cvolpan));
 788                                 dsb->need_remix = FALSE;
 789                         }
 790                         LeaveCriticalSection(&(dsb->lock));
 791                 }
 792         }
 793
 794         /* wipe out premixed data */
 795         if (dsound->mixpos < writepos) {
 796                 memset(dsound->buffer + writepos, nfiller, dsound->buflen - writepos);
 797                 memset(dsound->buffer, nfiller, dsound->mixpos);
 798         } else {
 799                 memset(dsound->buffer + writepos, nfiller, dsound->mixpos - writepos);
 800         }
 801
 802         /* reset primary mix position */
 803         dsound->mixpos = writepos;
 804 }
 805
 806 static void DSOUND_CheckReset(IDirectSoundImpl *dsound, DWORD writepos)
 807 {
 808         if (dsound->need_remix) {
 809                 DSOUND_MixReset(writepos);
 810                 dsound->need_remix = FALSE;
 811                 /* maximize Half-Life performance */
 812                 dsound->prebuf = ds_snd_queue_min;
 813                 dsound->precount = 0;
 814         } else {
 815                 dsound->precount++;
 816                 if (dsound->precount >= 4) {
 817                         if (dsound->prebuf < ds_snd_queue_max)
 818                                 dsound->prebuf++;
 819                         dsound->precount = 0;
 820                 }
 821         }
 822         TRACE("premix adjust: %d\n", dsound->prebuf);
 823 }
 824
 825 void DSOUND_WaveQueue(IDirectSoundImpl *dsound, DWORD mixq)
 826 {
 827         if (mixq + dsound->pwqueue > ds_hel_queue) mixq = ds_hel_queue - dsound->pwqueue;
 828         TRACE("queueing %ld buffers, starting at %d\n", mixq, dsound->pwwrite);
 829         for (; mixq; mixq--) {
 830                 waveOutWrite(dsound->hwo, dsound->pwave[dsound->pwwrite], sizeof(WAVEHDR));
 831                 dsound->pwwrite++;
 832                 if (dsound->pwwrite >= DS_HEL_FRAGS) dsound->pwwrite = 0;
 833                 dsound->pwqueue++;
 834         }
 835 }
 836
 837 /* #define SYNC_CALLBACK */
 838
 839 void DSOUND_PerformMix(void)
 840 {
 841         int nfiller;
 842         BOOL forced;
 843         HRESULT hres;
 844
 845         TRACE("()\n");
 846
 847         RtlAcquireResourceShared(&(dsound->lock), TRUE);
 848
 849         if (!dsound || !dsound->ref) {
 850                 /* seems the dsound object is currently being released */
 851                 RtlReleaseResource(&(dsound->lock));
 852                 return;
 853         }
 854
 855         /* the sound of silence */
 856         nfiller = dsound->wfx.wBitsPerSample == 8 ? 128 : 0;
 857
 858         /* whether the primary is forced to play even without secondary buffers */
 859         forced = ((dsound->state == STATE_PLAYING) || (dsound->state == STATE_STARTING));
 860
 861         TRACE("entering at %ld\n", GetTickCount());
 862         if (dsound->priolevel != DSSCL_WRITEPRIMARY) {
 863                 BOOL paused = ((dsound->state == STATE_STOPPED) || (dsound->state == STATE_STARTING));
 864                 /* FIXME: document variables */
 865                 DWORD playpos, writepos, inq, maxq, frag;
 866                 if (dsound->hwbuf) {
 867                         hres = IDsDriverBuffer_GetPosition(dsound->hwbuf, &playpos, &writepos);
 868                         if (hres) {
 869                             RtlReleaseResource(&(dsound->lock));
 870                             return;
 871                         }
 872                         /* Well, we *could* do Just-In-Time mixing using the writepos,
 873                          * but that's a little bit ambitious and unnecessary... */
 874                         /* rather add our safety margin to the writepos, if we're playing */
 875                         if (!paused) {
 876                                 writepos += dsound->writelead;
 877                                 while (writepos >= dsound->buflen)
 878                                         writepos -= dsound->buflen;
 879                         } else writepos = playpos;
 880                 }
 881                 else {
 882                         playpos = dsound->pwplay * dsound->fraglen;
 883                         writepos = playpos;
 884                         if (!paused) {
 885                                 writepos += ds_hel_margin * dsound->fraglen;
 886                                 while (writepos >= dsound->buflen)
 887                                         writepos -= dsound->buflen;
 888                         }
 889                 }
 890                 TRACE("primary playpos=%ld, writepos=%ld, clrpos=%ld, mixpos=%ld\n",
 891                       playpos,writepos,dsound->playpos,dsound->mixpos);
 892                 /* wipe out just-played sound data */
 893                 if (playpos < dsound->playpos) {
 894                         memset(dsound->buffer + dsound->playpos, nfiller, dsound->buflen - dsound->playpos);
 895                         memset(dsound->buffer, nfiller, playpos);
 896                 } else {
 897                         memset(dsound->buffer + dsound->playpos, nfiller, playpos - dsound->playpos);
 898                 }
 899                 dsound->playpos = playpos;
 900
 901                 EnterCriticalSection(&(dsound->mixlock));
 902
 903                 /* reset mixing if necessary */
 904                 DSOUND_CheckReset(dsound, writepos);
 905
 906                 /* check how much prebuffering is left */
 907                 inq = dsound->mixpos;
 908                 if (inq < writepos)
 909                         inq += dsound->buflen;
 910                 inq -= writepos;
 911
 912                 /* find the maximum we can prebuffer */
 913                 if (!paused) {
 914                         maxq = playpos;
 915                         if (maxq < writepos)
 916                                 maxq += dsound->buflen;
 917                         maxq -= writepos;
 918                 } else maxq = dsound->buflen;
 919
 920                 /* clip maxq to dsound->prebuf */
 921                 frag = dsound->prebuf * dsound->fraglen;
 922                 if (maxq > frag) maxq = frag;
 923
 924                 /* check for consistency */
 925                 if (inq > maxq) {
 926                         /* the playback position must have passed our last
 927                          * mixed position, i.e. it's an underrun, or we have
 928                          * nothing more to play */
 929                         TRACE("reached end of mixed data (inq=%ld, maxq=%ld)\n", inq, maxq);
 930                         inq = 0;
 931                         /* stop the playback now, to allow buffers to refill */
 932                         if (dsound->state == STATE_PLAYING) {
 933                                 dsound->state = STATE_STARTING;
 934                         }
 935                         else if (dsound->state == STATE_STOPPING) {
 936                                 dsound->state = STATE_STOPPED;
 937                         }
 938                         else {
 939                                 /* how can we have an underrun if we aren't playing? */
 940                                 WARN("unexpected primary state (%ld)\n", dsound->state);
 941                         }
 942 #ifdef SYNC_CALLBACK
 943                         /* DSOUND_callback may need this lock */
 944                         LeaveCriticalSection(&(dsound->mixlock));
 945 #endif
 946                         DSOUND_PrimaryStop(dsound);
 947 #ifdef SYNC_CALLBACK
 948                         EnterCriticalSection(&(dsound->mixlock));
 949 #endif
 950                         if (dsound->hwbuf) {
 951                                 /* the Stop is supposed to reset play position to beginning of buffer */
 952                                 /* unfortunately, OSS is not able to do so, so get current pointer */
 953                                 hres = IDsDriverBuffer_GetPosition(dsound->hwbuf, &playpos, NULL);
 954                                 if (hres) {
 955                                         LeaveCriticalSection(&(dsound->mixlock));
 956                                         RtlReleaseResource(&(dsound->lock));
 957                                         return;
 958                                 }
 959                         } else {
 960                                 playpos = dsound->pwplay * dsound->fraglen;
 961                         }
 962                         writepos = playpos;
 963                         dsound->playpos = playpos;
 964                         dsound->mixpos = writepos;
 965                         inq = 0;
 966                         maxq = dsound->buflen;
 967                         if (maxq > frag) maxq = frag;
 968                         memset(dsound->buffer, nfiller, dsound->buflen);
 969                         paused = TRUE;
 970                 }
 971
 972                 /* do the mixing */
 973                 frag = DSOUND_MixToPrimary(playpos, writepos, maxq, paused);
 974                 if (forced) frag = maxq - inq;
 975                 dsound->mixpos += frag;
 976                 while (dsound->mixpos >= dsound->buflen)
 977                         dsound->mixpos -= dsound->buflen;
 978
 979                 if (frag) {
 980                         /* buffers have been filled, restart playback */
 981                         if (dsound->state == STATE_STARTING) {
 982                                 dsound->state = STATE_PLAYING;
 983                         }
 984                         else if (dsound->state == STATE_STOPPED) {
 985                                 /* the dsound is supposed to play if there's something to play
 986                                  * even if it is reported as stopped, so don't let this confuse you */
 987                                 dsound->state = STATE_STOPPING;
 988                         }
 989                         LeaveCriticalSection(&(dsound->mixlock));
 990                         if (paused) {
 991                                 DSOUND_PrimaryPlay(dsound);
 992                                 TRACE("starting playback\n");
 993                         }
 994                 }
 995                 else
 996                         LeaveCriticalSection(&(dsound->mixlock));
 997         } else {
 998                 /* in the DSSCL_WRITEPRIMARY mode, the app is totally in charge... */
 999                 if (dsound->state == STATE_STARTING) {
1000                         DSOUND_PrimaryPlay(dsound);
1001                         dsound->state = STATE_PLAYING;
1002                 }
1003                 else if (dsound->state == STATE_STOPPING) {
1004                         DSOUND_PrimaryStop(dsound);
1005                         dsound->state = STATE_STOPPED;
1006                 }
1007         }
1008         TRACE("completed processing at %ld\n", GetTickCount());
1009         RtlReleaseResource(&(dsound->lock));
1010 }
1011
1012 void CALLBACK DSOUND_timer(UINT timerID, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2)
1013 {
1014         if (!dsound) {
1015                 ERR("dsound died without killing us?\n");
1016                 timeKillEvent(timerID);
1017                 timeEndPeriod(DS_TIME_RES);
1018                 return;
1019         }
1020
1021         TRACE("entered\n");
1022         DSOUND_PerformMix();
1023 }
1024
1025 void CALLBACK DSOUND_callback(HWAVEOUT hwo, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2)
1026 {
1027         IDirectSoundImpl* This = (IDirectSoundImpl*)dwUser;
1028         TRACE("entering at %ld, msg=%08x(%s)\n", GetTickCount(), msg,
1029                 msg==MM_WOM_DONE ? "MM_WOM_DONE" : msg==MM_WOM_CLOSE ? "MM_WOM_CLOSE" :
1030                 msg==MM_WOM_OPEN ? "MM_WOM_OPEN" : "UNKNOWN");
1031         if (msg == MM_WOM_DONE) {
1032                 DWORD inq, mixq, fraglen, buflen, pwplay, playpos, mixpos;
1033                 if (This->pwqueue == (DWORD)-1) {
1034                         TRACE("completed due to reset\n");
1035                         return;
1036                 }
1037 /* it could be a bad idea to enter critical section here... if there's lock contention,
1038  * the resulting scheduling delays might obstruct the winmm player thread */
1039 #ifdef SYNC_CALLBACK
1040                 EnterCriticalSection(&(This->mixlock));
1041 #endif
1042                 /* retrieve current values */
1043                 fraglen = dsound->fraglen;
1044                 buflen = dsound->buflen;
1045                 pwplay = dsound->pwplay;
1046                 playpos = pwplay * fraglen;
1047                 mixpos = dsound->mixpos;
1048                 /* check remaining mixed data */
1049                 inq = ((mixpos < playpos) ? buflen : 0) + mixpos - playpos;
1050                 mixq = inq / fraglen;
1051                 if ((inq - (mixq * fraglen)) > 0) mixq++;
1052                 /* complete the playing buffer */
1053                 TRACE("done playing primary pos=%ld\n", playpos);
1054                 pwplay++;
1055                 if (pwplay >= DS_HEL_FRAGS) pwplay = 0;
1056                 /* write new values */
1057                 dsound->pwplay = pwplay;
1058                 dsound->pwqueue--;
1059                 /* queue new buffer if we have data for it */
1060                 if (inq>1) DSOUND_WaveQueue(This, inq-1);
1061 #ifdef SYNC_CALLBACK
1062                 LeaveCriticalSection(&(This->mixlock));
1063 #endif
1064         }
1065         TRACE("completed\n");
1066 }