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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 <stdarg.h>
  25 #include <stdio.h>
  26 #include <sys/types.h>
  27 #include <sys/fcntl.h>
  28 #ifdef HAVE_UNISTD_H
  29 # include <unistd.h>
  30 #endif
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <math.h>       /* Insomnia - pow() function */
  34
  35 #include "windef.h"
  36 #include "winbase.h"
  37 #include "wingdi.h"
  38 #include "winuser.h"
  39 #include "winerror.h"
  40 #include "mmsystem.h"
  41 #include "winreg.h"
  42 #include "winternl.h"
  43 #include "mmddk.h"
  44 #include "wine/windef16.h"
  45 #include "wine/debug.h"
  46 #include "dsound.h"
  47 #include "dsdriver.h"
  48 #include "dsound_private.h"
  49
  50 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
  51
  52 void DSOUND_RecalcVolPan(PDSVOLUMEPAN volpan)
  53 {
  54         double temp;
  55         TRACE("(%p)\n",volpan);
  56
  57         /* the AmpFactors are expressed in 16.16 fixed point */
  58         volpan->dwVolAmpFactor = (ULONG) (pow(2.0, volpan->lVolume / 600.0) * 0xffff);
  59         /* FIXME: dwPan{Left|Right}AmpFactor */
  60
  61         /* FIXME: use calculated vol and pan ampfactors */
  62         temp = (double) (volpan->lVolume - (volpan->lPan > 0 ? volpan->lPan : 0));
  63         volpan->dwTotalLeftAmpFactor = (ULONG) (pow(2.0, temp / 600.0) * 0xffff);
  64         temp = (double) (volpan->lVolume + (volpan->lPan < 0 ? volpan->lPan : 0));
  65         volpan->dwTotalRightAmpFactor = (ULONG) (pow(2.0, temp / 600.0) * 0xffff);
  66
  67         TRACE("left = %lx, right = %lx\n", volpan->dwTotalLeftAmpFactor, volpan->dwTotalRightAmpFactor);
  68 }
  69
  70 void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb)
  71 {
  72         DWORD sw;
  73         TRACE("(%p)\n",dsb);
  74
  75         sw = dsb->wfx.nChannels * (dsb->wfx.wBitsPerSample / 8);
  76         /* calculate the 10ms write lead */
  77         dsb->writelead = (dsb->freq / 100) * sw;
  78 }
  79
  80 void DSOUND_CheckEvent(IDirectSoundBufferImpl *dsb, int len)
  81 {
  82         int                     i;
  83         DWORD                   offset;
  84         LPDSBPOSITIONNOTIFY     event;
  85         TRACE("(%p,%d)\n",dsb,len);
  86
  87         if (dsb->nrofnotifies == 0)
  88                 return;
  89
  90         TRACE("(%p) buflen = %ld, playpos = %ld, len = %d\n",
  91                 dsb, dsb->buflen, dsb->playpos, len);
  92         for (i = 0; i < dsb->nrofnotifies ; i++) {
  93                 event = dsb->notifies + i;
  94                 offset = event->dwOffset;
  95                 TRACE("checking %d, position %ld, event = %p\n",
  96                         i, offset, event->hEventNotify);
  97                 /* DSBPN_OFFSETSTOP has to be the last element. So this is */
  98                 /* OK. [Inside DirectX, p274] */
  99                 /*  */
 100                 /* This also means we can't sort the entries by offset, */
 101                 /* because DSBPN_OFFSETSTOP == -1 */
 102                 if (offset == DSBPN_OFFSETSTOP) {
 103                         if (dsb->state == STATE_STOPPED) {
 104                                 SetEvent(event->hEventNotify);
 105                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 106                                 return;
 107                         } else
 108                                 return;
 109                 }
 110                 if ((dsb->playpos + len) >= dsb->buflen) {
 111                         if ((offset < ((dsb->playpos + len) % dsb->buflen)) ||
 112                             (offset >= dsb->playpos)) {
 113                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 114                                 SetEvent(event->hEventNotify);
 115                         }
 116                 } else {
 117                         if ((offset >= dsb->playpos) && (offset < (dsb->playpos + len))) {
 118                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 119                                 SetEvent(event->hEventNotify);
 120                         }
 121                 }
 122         }
 123 }
 124
 125 /* WAV format info can be found at:
 126  *
 127  *    http://www.cwi.nl/ftp/audio/AudioFormats.part2
 128  *    ftp://ftp.cwi.nl/pub/audio/RIFF-format
 129  *
 130  * Import points to remember:
 131  *    8-bit WAV is unsigned
 132  *    16-bit WAV is signed
 133  */
 134  /* Use the same formulas as pcmconverter.c */
 135 static inline INT16 cvtU8toS16(BYTE b)
 136 {
 137     return (short)((b+(b << 8))-32768);
 138 }
 139
 140 static inline BYTE cvtS16toU8(INT16 s)
 141 {
 142     return (s >> 8) ^ (unsigned char)0x80;
 143 }
 144
 145 static inline void cp_fields(const IDirectSoundBufferImpl *dsb, BYTE *ibuf, BYTE *obuf )
 146 {
 147         INT fl,fr;
 148
 149         if (dsb->wfx.wBitsPerSample == 8)  {
 150                 if (dsb->dsound->wfx.wBitsPerSample == 8 &&
 151                     dsb->dsound->wfx.nChannels == dsb->wfx.nChannels) {
 152                         /* avoid needless 8->16->8 conversion */
 153                         *obuf=*ibuf;
 154                         if (dsb->wfx.nChannels==2)
 155                                 *(obuf+1)=*(ibuf+1);
 156                         return;
 157                 }
 158                 fl = cvtU8toS16(*ibuf);
 159                 fr = (dsb->wfx.nChannels==2 ? cvtU8toS16(*(ibuf + 1)) : fl);
 160         } else {
 161                 fl = *((INT16 *)ibuf);
 162                 fr = (dsb->wfx.nChannels==2 ? *(((INT16 *)ibuf) + 1)  : fl);
 163         }
 164
 165         if (dsb->dsound->wfx.nChannels == 2) {
 166                 if (dsb->dsound->wfx.wBitsPerSample == 8) {
 167                         *obuf = cvtS16toU8(fl);
 168                         *(obuf + 1) = cvtS16toU8(fr);
 169                         return;
 170                 }
 171                 if (dsb->dsound->wfx.wBitsPerSample == 16) {
 172                         *((INT16 *)obuf) = fl;
 173                         *(((INT16 *)obuf) + 1) = fr;
 174                         return;
 175                 }
 176         }
 177         if (dsb->dsound->wfx.nChannels == 1) {
 178                 fl = (fl + fr) >> 1;
 179                 if (dsb->dsound->wfx.wBitsPerSample == 8) {
 180                         *obuf = cvtS16toU8(fl);
 181                         return;
 182                 }
 183                 if (dsb->dsound->wfx.wBitsPerSample == 16) {
 184                         *((INT16 *)obuf) = fl;
 185                         return;
 186                 }
 187         }
 188 }
 189
 190 /* Now with PerfectPitch (tm) technology */
 191 static INT DSOUND_MixerNorm(IDirectSoundBufferImpl *dsb, BYTE *buf, INT len)
 192 {
 193         INT     i, size, ipos, ilen;
 194         BYTE    *ibp, *obp;
 195         INT     iAdvance = dsb->wfx.nBlockAlign;
 196         INT     oAdvance = dsb->dsound->wfx.nBlockAlign;
 197
 198         ibp = dsb->buffer->memory + dsb->buf_mixpos;
 199         obp = buf;
 200
 201         TRACE("(%p, %p, %p), buf_mixpos=%ld\n", dsb, ibp, obp, dsb->buf_mixpos);
 202         /* Check for the best case */
 203         if ((dsb->freq == dsb->dsound->wfx.nSamplesPerSec) &&
 204             (dsb->wfx.wBitsPerSample == dsb->dsound->wfx.wBitsPerSample) &&
 205             (dsb->wfx.nChannels == dsb->dsound->wfx.nChannels)) {
 206                 DWORD bytesleft = dsb->buflen - dsb->buf_mixpos;
 207                 TRACE("(%p) Best case\n", dsb);
 208                 if (len <= bytesleft )
 209                         memcpy(obp, ibp, len);
 210                 else { /* wrap */
 211                         memcpy(obp, ibp, bytesleft );
 212                         memcpy(obp + bytesleft, dsb->buffer->memory, len - bytesleft);
 213                 }
 214                 return len;
 215         }
 216
 217         /* Check for same sample rate */
 218         if (dsb->freq == dsb->dsound->wfx.nSamplesPerSec) {
 219                 TRACE("(%p) Same sample rate %ld = primary %ld\n", dsb,
 220                         dsb->freq, dsb->dsound->wfx.nSamplesPerSec);
 221                 ilen = 0;
 222                 for (i = 0; i < len; i += oAdvance) {
 223                         cp_fields(dsb, ibp, obp );
 224                         ibp += iAdvance;
 225                         ilen += iAdvance;
 226                         obp += oAdvance;
 227                         if (ibp >= (BYTE *)(dsb->buffer->memory + dsb->buflen))
 228                                 ibp = dsb->buffer->memory;      /* wrap */
 229                 }
 230                 return (ilen);
 231         }
 232
 233         /* Mix in different sample rates */
 234         /* */
 235         /* New PerfectPitch(tm) Technology (c) 1998 Rob Riggs */
 236         /* Patent Pending :-] */
 237
 238         /* Patent enhancements (c) 2000 Ove Kåven,
 239          * TransGaming Technologies Inc. */
 240
 241         /* FIXME("(%p) Adjusting frequency: %ld -> %ld (need optimization)\n",
 242            dsb, dsb->freq, dsb->dsound->wfx.nSamplesPerSec); */
 243
 244         size = len / oAdvance;
 245         ilen = 0;
 246         ipos = dsb->buf_mixpos;
 247         for (i = 0; i < size; i++) {
 248                 cp_fields(dsb, (dsb->buffer->memory + ipos), obp);
 249                 obp += oAdvance;
 250                 dsb->freqAcc += dsb->freqAdjust;
 251                 if (dsb->freqAcc >= (1<<DSOUND_FREQSHIFT)) {
 252                         ULONG adv = (dsb->freqAcc>>DSOUND_FREQSHIFT) * iAdvance;
 253                         dsb->freqAcc &= (1<<DSOUND_FREQSHIFT)-1;
 254                         ipos += adv; ilen += adv;
 255                         while (ipos >= dsb->buflen)
 256                                 ipos -= dsb->buflen;
 257                 }
 258         }
 259         return ilen;
 260 }
 261
 262 static void DSOUND_MixerVol(IDirectSoundBufferImpl *dsb, BYTE *buf, INT len)
 263 {
 264         INT     i;
 265         BYTE    *bpc = buf;
 266         INT16   *bps = (INT16 *) buf;
 267
 268         TRACE("(%p,%p,%d)\n",dsb,buf,len);
 269         TRACE("left = %lx, right = %lx\n", dsb->cvolpan.dwTotalLeftAmpFactor,
 270                 dsb->cvolpan.dwTotalRightAmpFactor);
 271
 272         if ((!(dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) || (dsb->cvolpan.lPan == 0)) &&
 273             (!(dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) || (dsb->cvolpan.lVolume == 0)) &&
 274             !(dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
 275                 return;         /* Nothing to do */
 276
 277         /* If we end up with some bozo coder using panning or 3D sound */
 278         /* with a mono primary buffer, it could sound very weird using */
 279         /* this method. Oh well, tough patooties. */
 280
 281         switch (dsb->dsound->wfx.wBitsPerSample) {
 282         case 8:
 283                 /* 8-bit WAV is unsigned, but we need to operate */
 284                 /* on signed data for this to work properly */
 285                 switch (dsb->dsound->wfx.nChannels) {
 286                 case 1:
 287                         for (i = 0; i < len; i++) {
 288                                 INT val = *bpc - 128;
 289                                 val = (val * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 290                                 *bpc = val + 128;
 291                                 bpc++;
 292                         }
 293                         break;
 294                 case 2:
 295                         for (i = 0; i < len; i+=2) {
 296                                 INT val = *bpc - 128;
 297                                 val = (val * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 298                                 *bpc++ = val + 128;
 299                                 val = *bpc - 128;
 300                                 val = (val * dsb->cvolpan.dwTotalRightAmpFactor) >> 16;
 301                                 *bpc = val + 128;
 302                                 bpc++;
 303                         }
 304                         break;
 305                 default:
 306                         FIXME("doesn't support %d channels\n", dsb->dsound->wfx.nChannels);
 307                         break;
 308                 }
 309                 break;
 310         case 16:
 311                 /* 16-bit WAV is signed -- much better */
 312                 switch (dsb->dsound->wfx.nChannels) {
 313                 case 1:
 314                         for (i = 0; i < len; i += 2) {
 315                                 *bps = (*bps * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 316                                 bps++;
 317                         }
 318                         break;
 319                 case 2:
 320                         for (i = 0; i < len; i += 4) {
 321                                 *bps = (*bps * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 322                                 bps++;
 323                                 *bps = (*bps * dsb->cvolpan.dwTotalRightAmpFactor) >> 16;
 324                                 bps++;
 325                         }
 326                         break;
 327                 default:
 328                         FIXME("doesn't support %d channels\n", dsb->dsound->wfx.nChannels);
 329                         break;
 330                 }
 331                 break;
 332         default:
 333                 FIXME("doesn't support %d bit samples\n", dsb->dsound->wfx.wBitsPerSample);
 334                 break;
 335         }
 336 }
 337
 338 static void *tmp_buffer;
 339 static size_t tmp_buffer_len = 0;
 340
 341 static void *DSOUND_tmpbuffer(size_t len)
 342 {
 343   if (len>tmp_buffer_len) {
 344     void *new_buffer = realloc(tmp_buffer, len);
 345     if (new_buffer) {
 346       tmp_buffer = new_buffer;
 347       tmp_buffer_len = len;
 348     }
 349     return new_buffer;
 350   }
 351   return tmp_buffer;
 352 }
 353
 354 static DWORD DSOUND_MixInBuffer(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD fraglen)
 355 {
 356         INT     i, len, ilen, temp, field, nBlockAlign;
 357         INT     advance = dsb->dsound->wfx.wBitsPerSample >> 3;
 358         BYTE    *buf, *ibuf, *obuf;
 359         INT16   *ibufs, *obufs;
 360
 361         TRACE("(%p,%ld,%ld)\n",dsb,writepos,fraglen);
 362
 363         len = fraglen;
 364         if (!(dsb->playflags & DSBPLAY_LOOPING)) {
 365                 temp = MulDiv(dsb->dsound->wfx.nAvgBytesPerSec, dsb->buflen,
 366                         dsb->nAvgBytesPerSec) -
 367                        MulDiv(dsb->dsound->wfx.nAvgBytesPerSec, dsb->buf_mixpos,
 368                         dsb->nAvgBytesPerSec);
 369                 len = (len > temp) ? temp : len;
 370         }
 371         nBlockAlign = dsb->dsound->wfx.nBlockAlign;
 372         len = len / nBlockAlign * nBlockAlign;  /* data alignment */
 373
 374         if (len == 0) {
 375                 /* This should only happen if we aren't looping and temp < nBlockAlign */
 376                 return 0;
 377         }
 378
 379         /* Been seeing segfaults in malloc() for some reason... */
 380         TRACE("allocating buffer (size = %d)\n", len);
 381         if ((buf = ibuf = (BYTE *) DSOUND_tmpbuffer(len)) == NULL)
 382                 return 0;
 383
 384         TRACE("MixInBuffer (%p) len = %d, dest = %ld\n", dsb, len, writepos);
 385
 386         ilen = DSOUND_MixerNorm(dsb, ibuf, len);
 387         if ((dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) ||
 388             (dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) ||
 389             (dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
 390                 DSOUND_MixerVol(dsb, ibuf, len);
 391
 392         obuf = dsb->dsound->buffer + writepos;
 393         for (i = 0; i < len; i += advance) {
 394                 obufs = (INT16 *) obuf;
 395                 ibufs = (INT16 *) ibuf;
 396                 if (dsb->dsound->wfx.wBitsPerSample == 8) {
 397                         /* 8-bit WAV is unsigned */
 398                         field = (*ibuf - 128);
 399                         field += (*obuf - 128);
 400                         field = field > 127 ? 127 : field;
 401                         field = field < -128 ? -128 : field;
 402                         *obuf = field + 128;
 403                 } else {
 404                         /* 16-bit WAV is signed */
 405                         field = *ibufs;
 406                         field += *obufs;
 407                         field = field > 32767 ? 32767 : field;
 408                         field = field < -32768 ? -32768 : field;
 409                         *obufs = field;
 410                 }
 411                 ibuf += advance;
 412                 obuf += advance;
 413                 if (obuf >= (BYTE *)(dsb->dsound->buffer + dsb->dsound->buflen))
 414                         obuf = dsb->dsound->buffer;
 415         }
 416         /* free(buf); */
 417
 418         if (dsb->leadin && (dsb->startpos > dsb->buf_mixpos) && (dsb->startpos <= dsb->buf_mixpos + ilen)) {
 419                 /* HACK... leadin should be reset when the PLAY position reaches the startpos,
 420                  * not the MIX position... but if the sound buffer is bigger than our prebuffering
 421                  * (which must be the case for the streaming buffers that need this hack anyway)
 422                  * plus DS_HEL_MARGIN or equivalent, then this ought to work anyway. */
 423                 dsb->leadin = FALSE;
 424         }
 425
 426         dsb->buf_mixpos += ilen;
 427
 428         if (dsb->buf_mixpos >= dsb->buflen) {
 429                 if (dsb->playflags & DSBPLAY_LOOPING) {
 430                         /* wrap */
 431                         while (dsb->buf_mixpos >= dsb->buflen)
 432                                 dsb->buf_mixpos -= dsb->buflen;
 433                         if (dsb->leadin && (dsb->startpos <= dsb->buf_mixpos))
 434                                 dsb->leadin = FALSE; /* HACK: see above */
 435                 }
 436         }
 437
 438         return len;
 439 }
 440
 441 static void DSOUND_PhaseCancel(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD len)
 442 {
 443         INT     i, ilen, field, nBlockAlign;
 444         INT     advance = dsb->dsound->wfx.wBitsPerSample >> 3;
 445         BYTE    *buf, *ibuf, *obuf;
 446         INT16   *ibufs, *obufs;
 447         TRACE("(%p,%ld,%ld)\n",dsb,writepos,len);
 448
 449         nBlockAlign = dsb->dsound->wfx.nBlockAlign;
 450         len = len / nBlockAlign * nBlockAlign;  /* data alignment */
 451
 452         TRACE("allocating buffer (size = %ld)\n", len);
 453         if ((buf = ibuf = (BYTE *) DSOUND_tmpbuffer(len)) == NULL)
 454                 return;
 455
 456         TRACE("PhaseCancel (%p) len = %ld, dest = %ld\n", dsb, len, writepos);
 457
 458         ilen = DSOUND_MixerNorm(dsb, ibuf, len);
 459         if ((dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) ||
 460             (dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) ||
 461             (dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
 462                 DSOUND_MixerVol(dsb, ibuf, len);
 463
 464         /* subtract instead of add, to phase out premixed data */
 465         obuf = dsb->dsound->buffer + writepos;
 466         for (i = 0; i < len; i += advance) {
 467                 obufs = (INT16 *) obuf;
 468                 ibufs = (INT16 *) ibuf;
 469                 if (dsb->dsound->wfx.wBitsPerSample == 8) {
 470                         /* 8-bit WAV is unsigned */
 471                         field = (*ibuf - 128);
 472                         field -= (*obuf - 128);
 473                         field = field > 127 ? 127 : field;
 474                         field = field < -128 ? -128 : field;
 475                         *obuf = field + 128;
 476                 } else {
 477                         /* 16-bit WAV is signed */
 478                         field = *ibufs;
 479                         field -= *obufs;
 480                         field = field > 32767 ? 32767 : field;
 481                         field = field < -32768 ? -32768 : field;
 482                         *obufs = field;
 483                 }
 484                 ibuf += advance;
 485                 obuf += advance;
 486                 if (obuf >= (BYTE *)(dsb->dsound->buffer + dsb->dsound->buflen))
 487                         obuf = dsb->dsound->buffer;
 488         }
 489         /* free(buf); */
 490 }
 491
 492 static void DSOUND_MixCancel(IDirectSoundBufferImpl *dsb, DWORD writepos, BOOL cancel)
 493 {
 494         DWORD   size, flen, len, npos, nlen;
 495         INT     iAdvance = dsb->wfx.nBlockAlign;
 496         INT     oAdvance = dsb->dsound->wfx.nBlockAlign;
 497         /* determine amount of premixed data to cancel */
 498         DWORD primary_done =
 499                 ((dsb->primary_mixpos < writepos) ? dsb->dsound->buflen : 0) +
 500                 dsb->primary_mixpos - writepos;
 501
 502         TRACE("(%p, %ld), buf_mixpos=%ld\n", dsb, writepos, dsb->buf_mixpos);
 503
 504         /* backtrack the mix position */
 505         size = primary_done / oAdvance;
 506         flen = size * dsb->freqAdjust;
 507         len = (flen >> DSOUND_FREQSHIFT) * iAdvance;
 508         flen &= (1<<DSOUND_FREQSHIFT)-1;
 509         while (dsb->freqAcc < flen) {
 510                 len += iAdvance;
 511                 dsb->freqAcc += 1<<DSOUND_FREQSHIFT;
 512         }
 513         len %= dsb->buflen;
 514         npos = ((dsb->buf_mixpos < len) ? dsb->buflen : 0) +
 515                 dsb->buf_mixpos - len;
 516         if (dsb->leadin && (dsb->startpos > npos) && (dsb->startpos <= npos + len)) {
 517                 /* stop backtracking at startpos */
 518                 npos = dsb->startpos;
 519                 len = ((dsb->buf_mixpos < npos) ? dsb->buflen : 0) +
 520                         dsb->buf_mixpos - npos;
 521                 flen = dsb->freqAcc;
 522                 nlen = len / dsb->wfx.nBlockAlign;
 523                 nlen = ((nlen << DSOUND_FREQSHIFT) + flen) / dsb->freqAdjust;
 524                 nlen *= dsb->dsound->wfx.nBlockAlign;
 525                 writepos =
 526                         ((dsb->primary_mixpos < nlen) ? dsb->dsound->buflen : 0) +
 527                         dsb->primary_mixpos - nlen;
 528         }
 529
 530         dsb->freqAcc -= flen;
 531         dsb->buf_mixpos = npos;
 532         dsb->primary_mixpos = writepos;
 533
 534         TRACE("new buf_mixpos=%ld, primary_mixpos=%ld (len=%ld)\n",
 535               dsb->buf_mixpos, dsb->primary_mixpos, len);
 536
 537         if (cancel) DSOUND_PhaseCancel(dsb, writepos, len);
 538 }
 539
 540 void DSOUND_MixCancelAt(IDirectSoundBufferImpl *dsb, DWORD buf_writepos)
 541 {
 542 #if 0
 543         DWORD   i, size, flen, len, npos, nlen;
 544         INT     iAdvance = dsb->wfx.nBlockAlign;
 545         INT     oAdvance = dsb->dsound->wfx.nBlockAlign;
 546         /* determine amount of premixed data to cancel */
 547         DWORD buf_done =
 548                 ((dsb->buf_mixpos < buf_writepos) ? dsb->buflen : 0) +
 549                 dsb->buf_mixpos - buf_writepos;
 550 #endif
 551
 552         WARN("(%p, %ld), buf_mixpos=%ld\n", dsb, buf_writepos, dsb->buf_mixpos);
 553         /* since this is not implemented yet, just cancel *ALL* prebuffering for now
 554          * (which is faster anyway when there's only a single secondary buffer) */
 555         dsb->dsound->need_remix = TRUE;
 556 }
 557
 558 void DSOUND_ForceRemix(IDirectSoundBufferImpl *dsb)
 559 {
 560         TRACE("(%p)\n",dsb);
 561         EnterCriticalSection(&dsb->lock);
 562         if (dsb->state == STATE_PLAYING) {
 563 #if 0 /* this may not be quite reliable yet */
 564                 dsb->need_remix = TRUE;
 565 #else
 566                 dsb->dsound->need_remix = TRUE;
 567 #endif
 568         }
 569         LeaveCriticalSection(&dsb->lock);
 570 }
 571
 572 static DWORD DSOUND_MixOne(IDirectSoundBufferImpl *dsb, DWORD playpos, DWORD writepos, DWORD mixlen)
 573 {
 574         DWORD len, slen;
 575         /* determine this buffer's write position */
 576         DWORD buf_writepos = DSOUND_CalcPlayPosition(dsb, dsb->state & dsb->dsound->state, writepos,
 577                                                      writepos, dsb->primary_mixpos, dsb->buf_mixpos);
 578         /* determine how much already-mixed data exists */
 579         DWORD buf_done =
 580                 ((dsb->buf_mixpos < buf_writepos) ? dsb->buflen : 0) +
 581                 dsb->buf_mixpos - buf_writepos;
 582         DWORD primary_done =
 583                 ((dsb->primary_mixpos < writepos) ? dsb->dsound->buflen : 0) +
 584                 dsb->primary_mixpos - writepos;
 585         DWORD adv_done =
 586                 ((dsb->dsound->mixpos < writepos) ? dsb->dsound->buflen : 0) +
 587                 dsb->dsound->mixpos - writepos;
 588         DWORD played =
 589                 ((buf_writepos < dsb->playpos) ? dsb->buflen : 0) +
 590                 buf_writepos - dsb->playpos;
 591         DWORD buf_left = dsb->buflen - buf_writepos;
 592         int still_behind;
 593
 594         TRACE("(%p,%ld,%ld,%ld)\n",dsb,playpos,writepos,mixlen);
 595         TRACE("buf_writepos=%ld, primary_writepos=%ld\n", buf_writepos, writepos);
 596         TRACE("buf_done=%ld, primary_done=%ld\n", buf_done, primary_done);
 597         TRACE("buf_mixpos=%ld, primary_mixpos=%ld, mixlen=%ld\n", dsb->buf_mixpos, dsb->primary_mixpos,
 598               mixlen);
 599         TRACE("looping=%ld, startpos=%ld, leadin=%ld\n", dsb->playflags, dsb->startpos, dsb->leadin);
 600
 601         /* check for notification positions */
 602         if (dsb->dsbd.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY &&
 603             dsb->state != STATE_STARTING) {
 604                 DSOUND_CheckEvent(dsb, played);
 605         }
 606
 607         /* save write position for non-GETCURRENTPOSITION2... */
 608         dsb->playpos = buf_writepos;
 609
 610         /* check whether CalcPlayPosition detected a mixing underrun */
 611         if ((buf_done == 0) && (dsb->primary_mixpos != writepos)) {
 612                 /* it did, but did we have more to play? */
 613                 if ((dsb->playflags & DSBPLAY_LOOPING) ||
 614                     (dsb->buf_mixpos < dsb->buflen)) {
 615                         /* yes, have to recover */
 616                         ERR("underrun on sound buffer %p\n", dsb);
 617                         TRACE("recovering from underrun: primary_mixpos=%ld\n", writepos);
 618                 }
 619                 dsb->primary_mixpos = writepos;
 620                 primary_done = 0;
 621         }
 622         /* determine how far ahead we should mix */
 623         if (((dsb->playflags & DSBPLAY_LOOPING) ||
 624              (dsb->leadin && (dsb->probably_valid_to != 0))) &&
 625             !(dsb->dsbd.dwFlags & DSBCAPS_STATIC)) {
 626                 /* if this is a streaming buffer, it typically means that
 627                  * we should defer mixing past probably_valid_to as long
 628                  * as we can, to avoid unnecessary remixing */
 629                 /* the heavy-looking calculations shouldn't be that bad,
 630                  * as any game isn't likely to be have more than 1 or 2
 631                  * streaming buffers in use at any time anyway... */
 632                 DWORD probably_valid_left =
 633                         (dsb->probably_valid_to == (DWORD)-1) ? dsb->buflen :
 634                         ((dsb->probably_valid_to < buf_writepos) ? dsb->buflen : 0) +
 635                         dsb->probably_valid_to - buf_writepos;
 636                 /* check for leadin condition */
 637                 if ((probably_valid_left == 0) &&
 638                     (dsb->probably_valid_to == dsb->startpos) &&
 639                     dsb->leadin)
 640                         probably_valid_left = dsb->buflen;
 641                 TRACE("streaming buffer probably_valid_to=%ld, probably_valid_left=%ld\n",
 642                       dsb->probably_valid_to, probably_valid_left);
 643                 /* check whether the app's time is already up */
 644                 if (probably_valid_left < dsb->writelead) {
 645                         WARN("probably_valid_to now within writelead, possible streaming underrun\n");
 646                         /* once we pass the point of no return,
 647                          * no reason to hold back anymore */
 648                         dsb->probably_valid_to = (DWORD)-1;
 649                         /* we just have to go ahead and mix what we have,
 650                          * there's no telling what the app is thinking anyway */
 651                 } else {
 652                         /* adjust for our frequency and our sample size */
 653                         probably_valid_left = MulDiv(probably_valid_left,
 654                                                      1 << DSOUND_FREQSHIFT,
 655                                                      dsb->wfx.nBlockAlign * dsb->freqAdjust) *
 656                                               dsb->dsound->wfx.nBlockAlign;
 657                         /* check whether to clip mix_len */
 658                         if (probably_valid_left < mixlen) {
 659                                 TRACE("clipping to probably_valid_left=%ld\n", probably_valid_left);
 660                                 mixlen = probably_valid_left;
 661                         }
 662                 }
 663         }
 664         /* cut mixlen with what's already been mixed */
 665         if (mixlen < primary_done) {
 666                 /* huh? and still CalcPlayPosition didn't
 667                  * detect an underrun? */
 668                 FIXME("problem with underrun detection (mixlen=%ld < primary_done=%ld)\n", mixlen, primary_done);
 669                 return 0;
 670         }
 671         len = mixlen - primary_done;
 672         TRACE("remaining mixlen=%ld\n", len);
 673
 674         if (len < dsb->dsound->fraglen) {
 675                 /* smaller than a fragment, wait until it gets larger
 676                  * before we take the mixing overhead */
 677                 TRACE("mixlen not worth it, deferring mixing\n");
 678                 still_behind = 1;
 679                 goto post_mix;
 680         }
 681
 682         /* ok, we know how much to mix, let's go */
 683         still_behind = (adv_done > primary_done);
 684         while (len) {
 685                 slen = dsb->dsound->buflen - dsb->primary_mixpos;
 686                 if (slen > len) slen = len;
 687                 slen = DSOUND_MixInBuffer(dsb, dsb->primary_mixpos, slen);
 688
 689                 if ((dsb->primary_mixpos < dsb->dsound->mixpos) &&
 690                     (dsb->primary_mixpos + slen >= dsb->dsound->mixpos))
 691                         still_behind = FALSE;
 692
 693                 dsb->primary_mixpos += slen; len -= slen;
 694                 while (dsb->primary_mixpos >= dsb->dsound->buflen)
 695                         dsb->primary_mixpos -= dsb->dsound->buflen;
 696
 697                 if ((dsb->state == STATE_STOPPED) || !slen) break;
 698         }
 699         TRACE("new primary_mixpos=%ld, primary_advbase=%ld\n", dsb->primary_mixpos, dsb->dsound->mixpos);
 700         TRACE("mixed data len=%ld, still_behind=%d\n", mixlen-len, still_behind);
 701
 702 post_mix:
 703         /* check if buffer should be considered complete */
 704         if (buf_left < dsb->writelead &&
 705             !(dsb->playflags & DSBPLAY_LOOPING)) {
 706                 dsb->state = STATE_STOPPED;
 707                 dsb->playpos = 0;
 708                 dsb->last_playpos = 0;
 709                 dsb->buf_mixpos = 0;
 710                 dsb->leadin = FALSE;
 711                 DSOUND_CheckEvent(dsb, buf_left);
 712         }
 713
 714         /* return how far we think the primary buffer can
 715          * advance its underrun detector...*/
 716         if (still_behind) return 0;
 717         if ((mixlen - len) < primary_done) return 0;
 718         slen = ((dsb->primary_mixpos < dsb->dsound->mixpos) ?
 719                 dsb->dsound->buflen : 0) + dsb->primary_mixpos -
 720                 dsb->dsound->mixpos;
 721         if (slen > mixlen) {
 722                 /* the primary_done and still_behind checks above should have worked */
 723                 FIXME("problem with advancement calculation (advlen=%ld > mixlen=%ld)\n", slen, mixlen);
 724                 slen = 0;
 725         }
 726         return slen;
 727 }
 728
 729 static DWORD DSOUND_MixToPrimary(IDirectSoundImpl *dsound, DWORD playpos, DWORD writepos, DWORD mixlen, BOOL recover)
 730 {
 731         INT                     i, len, maxlen = 0;
 732         IDirectSoundBufferImpl  *dsb;
 733
 734         TRACE("(%ld,%ld,%ld,%d)\n", playpos, writepos, mixlen, recover);
 735         for (i = dsound->nrofbuffers - 1; i >= 0; i--) {
 736                 dsb = dsound->buffers[i];
 737
 738                 if (!dsb || !dsb->lpVtbl)
 739                         continue;
 740                 if (dsb->buflen && dsb->state && !dsb->hwbuf) {
 741                         TRACE("Checking %p, mixlen=%ld\n", dsb, mixlen);
 742                         EnterCriticalSection(&(dsb->lock));
 743                         if (dsb->state == STATE_STOPPING) {
 744                                 DSOUND_MixCancel(dsb, writepos, TRUE);
 745                                 dsb->state = STATE_STOPPED;
 746                                 DSOUND_CheckEvent(dsb, 0);
 747                         } else {
 748                                 if ((dsb->state == STATE_STARTING) || recover) {
 749                                         dsb->primary_mixpos = writepos;
 750                                         memcpy(&dsb->cvolpan, &dsb->volpan, sizeof(dsb->cvolpan));
 751                                         dsb->need_remix = FALSE;
 752                                 }
 753                                 else if (dsb->need_remix) {
 754                                         DSOUND_MixCancel(dsb, writepos, TRUE);
 755                                         memcpy(&dsb->cvolpan, &dsb->volpan, sizeof(dsb->cvolpan));
 756                                         dsb->need_remix = FALSE;
 757                                 }
 758                                 len = DSOUND_MixOne(dsb, playpos, writepos, mixlen);
 759                                 if (dsb->state == STATE_STARTING)
 760                                         dsb->state = STATE_PLAYING;
 761                                 maxlen = (len > maxlen) ? len : maxlen;
 762                         }
 763                         LeaveCriticalSection(&(dsb->lock));
 764                 }
 765         }
 766
 767         return maxlen;
 768 }
 769
 770 static void DSOUND_MixReset(IDirectSoundImpl *dsound, DWORD writepos)
 771 {
 772         INT                     i;
 773         IDirectSoundBufferImpl  *dsb;
 774         int nfiller;
 775
 776         TRACE("(%ld)\n", writepos);
 777
 778         /* the sound of silence */
 779         nfiller = dsound->wfx.wBitsPerSample == 8 ? 128 : 0;
 780
 781         /* reset all buffer mix positions */
 782         for (i = dsound->nrofbuffers - 1; i >= 0; i--) {
 783                 dsb = dsound->buffers[i];
 784
 785                 if (!dsb || !dsb->lpVtbl)
 786                         continue;
 787                 if (dsb->buflen && dsb->state && !dsb->hwbuf) {
 788                         TRACE("Resetting %p\n", dsb);
 789                         EnterCriticalSection(&(dsb->lock));
 790                         if (dsb->state == STATE_STOPPING) {
 791                                 dsb->state = STATE_STOPPED;
 792                         }
 793                         else if (dsb->state == STATE_STARTING) {
 794                                 /* nothing */
 795                         } else {
 796                                 DSOUND_MixCancel(dsb, writepos, FALSE);
 797                                 memcpy(&dsb->cvolpan, &dsb->volpan, sizeof(dsb->cvolpan));
 798                                 dsb->need_remix = FALSE;
 799                         }
 800                         LeaveCriticalSection(&(dsb->lock));
 801                 }
 802         }
 803
 804         /* wipe out premixed data */
 805         if (dsound->mixpos < writepos) {
 806                 memset(dsound->buffer + writepos, nfiller, dsound->buflen - writepos);
 807                 memset(dsound->buffer, nfiller, dsound->mixpos);
 808         } else {
 809                 memset(dsound->buffer + writepos, nfiller, dsound->mixpos - writepos);
 810         }
 811
 812         /* reset primary mix position */
 813         dsound->mixpos = writepos;
 814 }
 815
 816 static void DSOUND_CheckReset(IDirectSoundImpl *dsound, DWORD writepos)
 817 {
 818         TRACE("(%p,%ld)\n",dsound,writepos);
 819         if (dsound->need_remix) {
 820                 DSOUND_MixReset(dsound, writepos);
 821                 dsound->need_remix = FALSE;
 822                 /* maximize Half-Life performance */
 823                 dsound->prebuf = ds_snd_queue_min;
 824                 dsound->precount = 0;
 825         } else {
 826                 dsound->precount++;
 827                 if (dsound->precount >= 4) {
 828                         if (dsound->prebuf < ds_snd_queue_max)
 829                                 dsound->prebuf++;
 830                         dsound->precount = 0;
 831                 }
 832         }
 833         TRACE("premix adjust: %d\n", dsound->prebuf);
 834 }
 835
 836 void DSOUND_WaveQueue(IDirectSoundImpl *dsound, DWORD mixq)
 837 {
 838         TRACE("(%p,%ld)\n",dsound,mixq);
 839         if (mixq + dsound->pwqueue > ds_hel_queue) mixq = ds_hel_queue - dsound->pwqueue;
 840         TRACE("queueing %ld buffers, starting at %d\n", mixq, dsound->pwwrite);
 841         for (; mixq; mixq--) {
 842                 waveOutWrite(dsound->hwo, dsound->pwave[dsound->pwwrite], sizeof(WAVEHDR));
 843                 dsound->pwwrite++;
 844                 if (dsound->pwwrite >= DS_HEL_FRAGS) dsound->pwwrite = 0;
 845                 dsound->pwqueue++;
 846         }
 847 }
 848
 849 /* #define SYNC_CALLBACK */
 850
 851 void DSOUND_PerformMix(IDirectSoundImpl *dsound)
 852 {
 853         int nfiller;
 854         BOOL forced;
 855         HRESULT hres;
 856
 857         TRACE("()\n");
 858
 859         /* the sound of silence */
 860         nfiller = dsound->wfx.wBitsPerSample == 8 ? 128 : 0;
 861
 862         /* whether the primary is forced to play even without secondary buffers */
 863         forced = ((dsound->state == STATE_PLAYING) || (dsound->state == STATE_STARTING));
 864
 865         if (dsound->priolevel != DSSCL_WRITEPRIMARY) {
 866                 BOOL paused = ((dsound->state == STATE_STOPPED) || (dsound->state == STATE_STARTING));
 867                 /* FIXME: document variables */
 868                 DWORD playpos, writepos, inq, maxq, frag;
 869                 if (dsound->hwbuf) {
 870                         hres = IDsDriverBuffer_GetPosition(dsound->hwbuf, &playpos, &writepos);
 871                         if (hres) {
 872                             WARN("IDsDriverBuffer_GetPosition failed\n");
 873                             return;
 874                         }
 875                         /* Well, we *could* do Just-In-Time mixing using the writepos,
 876                          * but that's a little bit ambitious and unnecessary... */
 877                         /* rather add our safety margin to the writepos, if we're playing */
 878                         if (!paused) {
 879                                 writepos += dsound->writelead;
 880                                 while (writepos >= dsound->buflen)
 881                                         writepos -= dsound->buflen;
 882                         } else writepos = playpos;
 883                 } else {
 884                         playpos = dsound->pwplay * dsound->fraglen;
 885                         writepos = playpos;
 886                         if (!paused) {
 887                                 writepos += ds_hel_margin * dsound->fraglen;
 888                                 while (writepos >= dsound->buflen)
 889                                         writepos -= dsound->buflen;
 890                         }
 891                 }
 892                 TRACE("primary playpos=%ld, writepos=%ld, clrpos=%ld, mixpos=%ld, buflen=%ld\n",
 893                       playpos,writepos,dsound->playpos,dsound->mixpos,dsound->buflen);
 894                 assert(dsound->playpos < dsound->buflen);
 895                 /* wipe out just-played sound data */
 896                 if (playpos < dsound->playpos) {
 897                         memset(dsound->buffer + dsound->playpos, nfiller, dsound->buflen - dsound->playpos);
 898                         memset(dsound->buffer, nfiller, playpos);
 899                 } else {
 900                         memset(dsound->buffer + dsound->playpos, nfiller, playpos - dsound->playpos);
 901                 }
 902                 dsound->playpos = playpos;
 903
 904                 EnterCriticalSection(&(dsound->mixlock));
 905
 906                 /* reset mixing if necessary */
 907                 DSOUND_CheckReset(dsound, writepos);
 908
 909                 /* check how much prebuffering is left */
 910                 inq = dsound->mixpos;
 911                 if (inq < writepos)
 912                         inq += dsound->buflen;
 913                 inq -= writepos;
 914
 915                 /* find the maximum we can prebuffer */
 916                 if (!paused) {
 917                         maxq = playpos;
 918                         if (maxq < writepos)
 919                                 maxq += dsound->buflen;
 920                         maxq -= writepos;
 921                 } else maxq = dsound->buflen;
 922
 923                 /* clip maxq to dsound->prebuf */
 924                 frag = dsound->prebuf * dsound->fraglen;
 925                 if (maxq > frag) maxq = frag;
 926
 927                 /* check for consistency */
 928                 if (inq > maxq) {
 929                         /* the playback position must have passed our last
 930                          * mixed position, i.e. it's an underrun, or we have
 931                          * nothing more to play */
 932                         TRACE("reached end of mixed data (inq=%ld, maxq=%ld)\n", inq, maxq);
 933                         inq = 0;
 934                         /* stop the playback now, to allow buffers to refill */
 935                         if (dsound->state == STATE_PLAYING) {
 936                                 dsound->state = STATE_STARTING;
 937                         }
 938                         else if (dsound->state == STATE_STOPPING) {
 939                                 dsound->state = STATE_STOPPED;
 940                         }
 941                         else {
 942                                 /* how can we have an underrun if we aren't playing? */
 943                                 WARN("unexpected primary state (%ld)\n", dsound->state);
 944                         }
 945 #ifdef SYNC_CALLBACK
 946                         /* DSOUND_callback may need this lock */
 947                         LeaveCriticalSection(&(dsound->mixlock));
 948 #endif
 949                         if (DSOUND_PrimaryStop(dsound) != DS_OK)
 950                                 WARN("DSOUND_PrimaryStop failed\n");
 951 #ifdef SYNC_CALLBACK
 952                         EnterCriticalSection(&(dsound->mixlock));
 953 #endif
 954                         if (dsound->hwbuf) {
 955                                 /* the Stop is supposed to reset play position to beginning of buffer */
 956                                 /* unfortunately, OSS is not able to do so, so get current pointer */
 957                                 hres = IDsDriverBuffer_GetPosition(dsound->hwbuf, &playpos, NULL);
 958                                 if (hres) {
 959                                         LeaveCriticalSection(&(dsound->mixlock));
 960                                         WARN("IDsDriverBuffer_GetPosition failed\n");
 961                                         return;
 962                                 }
 963                         } else {
 964                                 playpos = dsound->pwplay * dsound->fraglen;
 965                         }
 966                         writepos = playpos;
 967                         dsound->playpos = playpos;
 968                         dsound->mixpos = writepos;
 969                         inq = 0;
 970                         maxq = dsound->buflen;
 971                         if (maxq > frag) maxq = frag;
 972                         memset(dsound->buffer, nfiller, dsound->buflen);
 973                         paused = TRUE;
 974                 }
 975
 976                 /* do the mixing */
 977                 frag = DSOUND_MixToPrimary(dsound, playpos, writepos, maxq, paused);
 978                 if (forced) frag = maxq - inq;
 979                 dsound->mixpos += frag;
 980                 while (dsound->mixpos >= dsound->buflen)
 981                         dsound->mixpos -= dsound->buflen;
 982
 983                 if (frag) {
 984                         /* buffers have been filled, restart playback */
 985                         if (dsound->state == STATE_STARTING) {
 986                                 dsound->state = STATE_PLAYING;
 987                         }
 988                         else if (dsound->state == STATE_STOPPED) {
 989                                 /* the dsound is supposed to play if there's something to play
 990                                  * even if it is reported as stopped, so don't let this confuse you */
 991                                 dsound->state = STATE_STOPPING;
 992                         }
 993                         LeaveCriticalSection(&(dsound->mixlock));
 994                         if (paused) {
 995                                 if (DSOUND_PrimaryPlay(dsound) != DS_OK)
 996                                         WARN("DSOUND_PrimaryPlay failed\n");
 997                                 else
 998                                         TRACE("starting playback\n");
 999                         }
1000                 }
1001                 else
1002                         LeaveCriticalSection(&(dsound->mixlock));
1003         } else {
1004                 /* in the DSSCL_WRITEPRIMARY mode, the app is totally in charge... */
1005                 if (dsound->state == STATE_STARTING) {
1006                         if (DSOUND_PrimaryPlay(dsound) != DS_OK)
1007                                 WARN("DSOUND_PrimaryPlay failed\n");
1008                         else
1009                                 dsound->state = STATE_PLAYING;
1010                 }
1011                 else if (dsound->state == STATE_STOPPING) {
1012                         if (DSOUND_PrimaryStop(dsound) != DS_OK)
1013                                 WARN("DSOUND_PrimaryStop failed\n");
1014                         else
1015                                 dsound->state = STATE_STOPPED;
1016                 }
1017         }
1018 }
1019
1020 void CALLBACK DSOUND_timer(UINT timerID, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2)
1021 {
1022         IDirectSoundImpl* This = (IDirectSoundImpl*)dwUser;
1023         TRACE("(%d,%d,0x%lx,0x%lx,0x%lx)\n",timerID,msg,dwUser,dw1,dw2);
1024         TRACE("entering at %ld\n", GetTickCount());
1025
1026         if (dsound != This) {
1027                 ERR("dsound died without killing us?\n");
1028                 timeKillEvent(timerID);
1029                 timeEndPeriod(DS_TIME_RES);
1030                 return;
1031         }
1032
1033         RtlAcquireResourceShared(&(This->lock), TRUE);
1034
1035         if (This->ref) {
1036                 DSOUND_PerformMix(This);
1037         }
1038
1039         RtlReleaseResource(&(This->lock));
1040
1041         TRACE("completed processing at %ld\n", GetTickCount());
1042 }
1043
1044 void CALLBACK DSOUND_callback(HWAVEOUT hwo, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2)
1045 {
1046         IDirectSoundImpl* This = (IDirectSoundImpl*)dwUser;
1047         TRACE("(%p,%x,%lx,%lx,%lx)\n",hwo,msg,dwUser,dw1,dw2);
1048         TRACE("entering at %ld, msg=%08x(%s)\n", GetTickCount(), msg,
1049                 msg==MM_WOM_DONE ? "MM_WOM_DONE" : msg==MM_WOM_CLOSE ? "MM_WOM_CLOSE" :
1050                 msg==MM_WOM_OPEN ? "MM_WOM_OPEN" : "UNKNOWN");
1051         if (msg == MM_WOM_DONE) {
1052                 DWORD inq, mixq, fraglen, buflen, pwplay, playpos, mixpos;
1053                 if (This->pwqueue == (DWORD)-1) {
1054                         TRACE("completed due to reset\n");
1055                         return;
1056                 }
1057 /* it could be a bad idea to enter critical section here... if there's lock contention,
1058  * the resulting scheduling delays might obstruct the winmm player thread */
1059 #ifdef SYNC_CALLBACK
1060                 EnterCriticalSection(&(This->mixlock));
1061 #endif
1062                 /* retrieve current values */
1063                 fraglen = This->fraglen;
1064                 buflen = This->buflen;
1065                 pwplay = This->pwplay;
1066                 playpos = pwplay * fraglen;
1067                 mixpos = This->mixpos;
1068                 /* check remaining mixed data */
1069                 inq = ((mixpos < playpos) ? buflen : 0) + mixpos - playpos;
1070                 mixq = inq / fraglen;
1071                 if ((inq - (mixq * fraglen)) > 0) mixq++;
1072                 /* complete the playing buffer */
1073                 TRACE("done playing primary pos=%ld\n", playpos);
1074                 pwplay++;
1075                 if (pwplay >= DS_HEL_FRAGS) pwplay = 0;
1076                 /* write new values */
1077                 This->pwplay = pwplay;
1078                 This->pwqueue--;
1079                 /* queue new buffer if we have data for it */
1080                 if (inq>1) DSOUND_WaveQueue(This, inq-1);
1081 #ifdef SYNC_CALLBACK
1082                 LeaveCriticalSection(&(This->mixlock));
1083 #endif
1084         }
1085         TRACE("completed\n");
1086 }