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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 <assert.h>
  23 #include <stdarg.h>
  24 #include <math.h>       /* Insomnia - pow() function */
  25
  26 #define NONAMELESSSTRUCT
  27 #define NONAMELESSUNION
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "mmsystem.h"
  31 #include "winreg.h"
  32 #include "winternl.h"
  33 #include "wine/debug.h"
  34 #include "dsound.h"
  35 #include "dsdriver.h"
  36 #include "dsound_private.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
  39
  40 void DSOUND_RecalcVolPan(PDSVOLUMEPAN volpan)
  41 {
  42         double temp;
  43         TRACE("(%p)\n",volpan);
  44
  45         TRACE("Vol=%ld Pan=%ld\n", volpan->lVolume, volpan->lPan);
  46         /* the AmpFactors are expressed in 16.16 fixed point */
  47         volpan->dwVolAmpFactor = (ULONG) (pow(2.0, volpan->lVolume / 600.0) * 0xffff);
  48         /* FIXME: dwPan{Left|Right}AmpFactor */
  49
  50         /* FIXME: use calculated vol and pan ampfactors */
  51         temp = (double) (volpan->lVolume - (volpan->lPan > 0 ? volpan->lPan : 0));
  52         volpan->dwTotalLeftAmpFactor = (ULONG) (pow(2.0, temp / 600.0) * 0xffff);
  53         temp = (double) (volpan->lVolume + (volpan->lPan < 0 ? volpan->lPan : 0));
  54         volpan->dwTotalRightAmpFactor = (ULONG) (pow(2.0, temp / 600.0) * 0xffff);
  55
  56         TRACE("left = %lx, right = %lx\n", volpan->dwTotalLeftAmpFactor, volpan->dwTotalRightAmpFactor);
  57 }
  58
  59 void DSOUND_AmpFactorToVolPan(PDSVOLUMEPAN volpan)
  60 {
  61     double left,right;
  62     TRACE("(%p)\n",volpan);
  63
  64     TRACE("left=%lx, right=%lx\n",volpan->dwTotalLeftAmpFactor,volpan->dwTotalRightAmpFactor);
  65     if (volpan->dwTotalLeftAmpFactor==0)
  66         left=-10000;
  67     else
  68         left=600 * log(((double)volpan->dwTotalLeftAmpFactor) / 0xffff) / log(2);
  69     if (volpan->dwTotalRightAmpFactor==0)
  70         right=-10000;
  71     else
  72         right=600 * log(((double)volpan->dwTotalRightAmpFactor) / 0xffff) / log(2);
  73     if (left<right)
  74     {
  75         volpan->lVolume=right;
  76         volpan->dwVolAmpFactor=volpan->dwTotalRightAmpFactor;
  77     }
  78     else
  79     {
  80         volpan->lVolume=left;
  81         volpan->dwVolAmpFactor=volpan->dwTotalLeftAmpFactor;
  82     }
  83     if (volpan->lVolume < -10000)
  84         volpan->lVolume=-10000;
  85     volpan->lPan=right-left;
  86     if (volpan->lPan < -10000)
  87         volpan->lPan=-10000;
  88
  89     TRACE("Vol=%ld Pan=%ld\n", volpan->lVolume, volpan->lPan);
  90 }
  91
  92 void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb)
  93 {
  94         TRACE("(%p)\n",dsb);
  95
  96         /* calculate the 10ms write lead */
  97         dsb->writelead = (dsb->freq / 100) * dsb->pwfx->nBlockAlign;
  98 }
  99
 100 void DSOUND_CheckEvent(IDirectSoundBufferImpl *dsb, int len)
 101 {
 102         int                     i;
 103         DWORD                   offset;
 104         LPDSBPOSITIONNOTIFY     event;
 105         TRACE("(%p,%d)\n",dsb,len);
 106
 107         if (dsb->nrofnotifies == 0)
 108                 return;
 109
 110         TRACE("(%p) buflen = %ld, playpos = %ld, len = %d\n",
 111                 dsb, dsb->buflen, dsb->playpos, len);
 112         for (i = 0; i < dsb->nrofnotifies ; i++) {
 113                 event = dsb->notifies + i;
 114                 offset = event->dwOffset;
 115                 TRACE("checking %d, position %ld, event = %p\n",
 116                         i, offset, event->hEventNotify);
 117                 /* DSBPN_OFFSETSTOP has to be the last element. So this is */
 118                 /* OK. [Inside DirectX, p274] */
 119                 /*  */
 120                 /* This also means we can't sort the entries by offset, */
 121                 /* because DSBPN_OFFSETSTOP == -1 */
 122                 if (offset == DSBPN_OFFSETSTOP) {
 123                         if (dsb->state == STATE_STOPPED) {
 124                                 SetEvent(event->hEventNotify);
 125                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 126                                 return;
 127                         } else
 128                                 return;
 129                 }
 130                 if ((dsb->playpos + len) >= dsb->buflen) {
 131                         if ((offset < ((dsb->playpos + len) % dsb->buflen)) ||
 132                             (offset >= dsb->playpos)) {
 133                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 134                                 SetEvent(event->hEventNotify);
 135                         }
 136                 } else {
 137                         if ((offset >= dsb->playpos) && (offset < (dsb->playpos + len))) {
 138                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 139                                 SetEvent(event->hEventNotify);
 140                         }
 141                 }
 142         }
 143 }
 144
 145 /* WAV format info can be found at:
 146  *
 147  *    http://www.cwi.nl/ftp/audio/AudioFormats.part2
 148  *    ftp://ftp.cwi.nl/pub/audio/RIFF-format
 149  *
 150  * Import points to remember:
 151  *    8-bit WAV is unsigned
 152  *    16-bit WAV is signed
 153  */
 154  /* Use the same formulas as pcmconverter.c */
 155 static inline INT16 cvtU8toS16(BYTE b)
 156 {
 157     return (short)((b+(b << 8))-32768);
 158 }
 159
 160 static inline BYTE cvtS16toU8(INT16 s)
 161 {
 162     return (s >> 8) ^ (unsigned char)0x80;
 163 }
 164
 165 static inline void cp_fields(const IDirectSoundBufferImpl *dsb, BYTE *ibuf, BYTE *obuf )
 166 {
 167         DirectSoundDevice * device = dsb->dsound->device;
 168         INT fl,fr;
 169
 170         if (dsb->pwfx->wBitsPerSample == 8)  {
 171                 if (device->pwfx->wBitsPerSample == 8 &&
 172                     device->pwfx->nChannels == dsb->pwfx->nChannels) {
 173                         /* avoid needless 8->16->8 conversion */
 174                         *obuf=*ibuf;
 175                         if (dsb->pwfx->nChannels==2)
 176                                 *(obuf+1)=*(ibuf+1);
 177                         return;
 178                 }
 179                 fl = cvtU8toS16(*ibuf);
 180                 fr = (dsb->pwfx->nChannels==2 ? cvtU8toS16(*(ibuf + 1)) : fl);
 181         } else {
 182                 fl = *((INT16 *)ibuf);
 183                 fr = (dsb->pwfx->nChannels==2 ? *(((INT16 *)ibuf) + 1)  : fl);
 184         }
 185
 186         if (device->pwfx->nChannels == 2) {
 187                 if (device->pwfx->wBitsPerSample == 8) {
 188                         *obuf = cvtS16toU8(fl);
 189                         *(obuf + 1) = cvtS16toU8(fr);
 190                         return;
 191                 }
 192                 if (device->pwfx->wBitsPerSample == 16) {
 193                         *((INT16 *)obuf) = fl;
 194                         *(((INT16 *)obuf) + 1) = fr;
 195                         return;
 196                 }
 197         }
 198         if (device->pwfx->nChannels == 1) {
 199                 fl = (fl + fr) >> 1;
 200                 if (device->pwfx->wBitsPerSample == 8) {
 201                         *obuf = cvtS16toU8(fl);
 202                         return;
 203                 }
 204                 if (device->pwfx->wBitsPerSample == 16) {
 205                         *((INT16 *)obuf) = fl;
 206                         return;
 207                 }
 208         }
 209 }
 210
 211 /* Now with PerfectPitch (tm) technology */
 212 static INT DSOUND_MixerNorm(IDirectSoundBufferImpl *dsb, BYTE *buf, INT len)
 213 {
 214         INT     i, size, ipos, ilen;
 215         BYTE    *ibp, *obp;
 216         INT     iAdvance = dsb->pwfx->nBlockAlign;
 217         INT     oAdvance = dsb->dsound->device->pwfx->nBlockAlign;
 218
 219         ibp = dsb->buffer->memory + dsb->buf_mixpos;
 220         obp = buf;
 221
 222         TRACE("(%p, %p, %p), buf_mixpos=%ld\n", dsb, ibp, obp, dsb->buf_mixpos);
 223         /* Check for the best case */
 224         if ((dsb->freq == dsb->dsound->device->pwfx->nSamplesPerSec) &&
 225             (dsb->pwfx->wBitsPerSample == dsb->dsound->device->pwfx->wBitsPerSample) &&
 226             (dsb->pwfx->nChannels == dsb->dsound->device->pwfx->nChannels)) {
 227                 INT bytesleft = dsb->buflen - dsb->buf_mixpos;
 228                 TRACE("(%p) Best case\n", dsb);
 229                 if (len <= bytesleft )
 230                         CopyMemory(obp, ibp, len);
 231                 else { /* wrap */
 232                         CopyMemory(obp, ibp, bytesleft);
 233                         CopyMemory(obp + bytesleft, dsb->buffer->memory, len - bytesleft);
 234                 }
 235                 return len;
 236         }
 237
 238         /* Check for same sample rate */
 239         if (dsb->freq == dsb->dsound->device->pwfx->nSamplesPerSec) {
 240                 TRACE("(%p) Same sample rate %ld = primary %ld\n", dsb,
 241                         dsb->freq, dsb->dsound->device->pwfx->nSamplesPerSec);
 242                 ilen = 0;
 243                 for (i = 0; i < len; i += oAdvance) {
 244                         cp_fields(dsb, ibp, obp );
 245                         ibp += iAdvance;
 246                         ilen += iAdvance;
 247                         obp += oAdvance;
 248                         if (ibp >= (BYTE *)(dsb->buffer->memory + dsb->buflen))
 249                                 ibp = dsb->buffer->memory;      /* wrap */
 250                 }
 251                 return (ilen);
 252         }
 253
 254         /* Mix in different sample rates */
 255         /* */
 256         /* New PerfectPitch(tm) Technology (c) 1998 Rob Riggs */
 257         /* Patent Pending :-] */
 258
 259         /* Patent enhancements (c) 2000 Ove Kåven,
 260          * TransGaming Technologies Inc. */
 261
 262         /* FIXME("(%p) Adjusting frequency: %ld -> %ld (need optimization)\n",
 263            dsb, dsb->freq, dsb->dsound->device->pwfx->nSamplesPerSec); */
 264
 265         size = len / oAdvance;
 266         ilen = 0;
 267         ipos = dsb->buf_mixpos;
 268         for (i = 0; i < size; i++) {
 269                 cp_fields(dsb, (dsb->buffer->memory + ipos), obp);
 270                 obp += oAdvance;
 271                 dsb->freqAcc += dsb->freqAdjust;
 272                 if (dsb->freqAcc >= (1<<DSOUND_FREQSHIFT)) {
 273                         ULONG adv = (dsb->freqAcc>>DSOUND_FREQSHIFT) * iAdvance;
 274                         dsb->freqAcc &= (1<<DSOUND_FREQSHIFT)-1;
 275                         ipos += adv; ilen += adv;
 276                         ipos %= dsb->buflen;
 277                 }
 278         }
 279         return ilen;
 280 }
 281
 282 static void DSOUND_MixerVol(IDirectSoundBufferImpl *dsb, BYTE *buf, INT len)
 283 {
 284         INT     i;
 285         BYTE    *bpc = buf;
 286         INT16   *bps = (INT16 *) buf;
 287
 288         TRACE("(%p,%p,%d)\n",dsb,buf,len);
 289         TRACE("left = %lx, right = %lx\n", dsb->cvolpan.dwTotalLeftAmpFactor,
 290                 dsb->cvolpan.dwTotalRightAmpFactor);
 291
 292         if ((!(dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) || (dsb->cvolpan.lPan == 0)) &&
 293             (!(dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) || (dsb->cvolpan.lVolume == 0)) &&
 294             !(dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
 295                 return;         /* Nothing to do */
 296
 297         /* If we end up with some bozo coder using panning or 3D sound */
 298         /* with a mono primary buffer, it could sound very weird using */
 299         /* this method. Oh well, tough patooties. */
 300
 301         switch (dsb->dsound->device->pwfx->wBitsPerSample) {
 302         case 8:
 303                 /* 8-bit WAV is unsigned, but we need to operate */
 304                 /* on signed data for this to work properly */
 305                 switch (dsb->dsound->device->pwfx->nChannels) {
 306                 case 1:
 307                         for (i = 0; i < len; i++) {
 308                                 INT val = *bpc - 128;
 309                                 val = (val * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 310                                 *bpc = val + 128;
 311                                 bpc++;
 312                         }
 313                         break;
 314                 case 2:
 315                         for (i = 0; i < len; i+=2) {
 316                                 INT val = *bpc - 128;
 317                                 val = (val * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 318                                 *bpc++ = val + 128;
 319                                 val = *bpc - 128;
 320                                 val = (val * dsb->cvolpan.dwTotalRightAmpFactor) >> 16;
 321                                 *bpc = val + 128;
 322                                 bpc++;
 323                         }
 324                         break;
 325                 default:
 326                         FIXME("doesn't support %d channels\n", dsb->dsound->device->pwfx->nChannels);
 327                         break;
 328                 }
 329                 break;
 330         case 16:
 331                 /* 16-bit WAV is signed -- much better */
 332                 switch (dsb->dsound->device->pwfx->nChannels) {
 333                 case 1:
 334                         for (i = 0; i < len; i += 2) {
 335                                 *bps = (*bps * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 336                                 bps++;
 337                         }
 338                         break;
 339                 case 2:
 340                         for (i = 0; i < len; i += 4) {
 341                                 *bps = (*bps * dsb->cvolpan.dwTotalLeftAmpFactor) >> 16;
 342                                 bps++;
 343                                 *bps = (*bps * dsb->cvolpan.dwTotalRightAmpFactor) >> 16;
 344                                 bps++;
 345                         }
 346                         break;
 347                 default:
 348                         FIXME("doesn't support %d channels\n", dsb->dsound->device->pwfx->nChannels);
 349                         break;
 350                 }
 351                 break;
 352         default:
 353                 FIXME("doesn't support %d bit samples\n", dsb->dsound->device->pwfx->wBitsPerSample);
 354                 break;
 355         }
 356 }
 357
 358 static LPBYTE DSOUND_tmpbuffer(DirectSoundDevice *device, DWORD len)
 359 {
 360     TRACE("(%p,%ld)\n", device, len);
 361
 362     if (len > device->tmp_buffer_len) {
 363         if (device->tmp_buffer)
 364             device->tmp_buffer = HeapReAlloc(GetProcessHeap(), 0, device->tmp_buffer, len);
 365         else
 366             device->tmp_buffer = HeapAlloc(GetProcessHeap(), 0, len);
 367
 368         device->tmp_buffer_len = len;
 369     }
 370
 371     return device->tmp_buffer;
 372 }
 373
 374 static DWORD DSOUND_MixInBuffer(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD fraglen)
 375 {
 376         INT     i, len, ilen, field, todo;
 377         BYTE    *buf, *ibuf;
 378
 379         TRACE("(%p,%ld,%ld)\n",dsb,writepos,fraglen);
 380
 381         len = fraglen;
 382         if (!(dsb->playflags & DSBPLAY_LOOPING)) {
 383                 int secondary_remainder = dsb->buflen - dsb->buf_mixpos;
 384                 int adjusted_remainder = MulDiv(dsb->dsound->device->pwfx->nAvgBytesPerSec, secondary_remainder, dsb->nAvgBytesPerSec);
 385                 assert(adjusted_remainder >= 0);
 386                 TRACE("secondary_remainder = %d, adjusted_remainder = %d, len = %d\n", secondary_remainder, adjusted_remainder, len);
 387                 if (adjusted_remainder < len) {
 388                         TRACE("clipping len to remainder of secondary buffer\n");
 389                         len = adjusted_remainder;
 390                 }
 391                 if (len == 0)
 392                         return 0;
 393         }
 394
 395         if (len % dsb->dsound->device->pwfx->nBlockAlign) {
 396                 INT nBlockAlign = dsb->dsound->device->pwfx->nBlockAlign;
 397                 ERR("length not a multiple of block size, len = %d, block size = %d\n", len, nBlockAlign);
 398                 len = (len / nBlockAlign) * nBlockAlign;        /* data alignment */
 399         }
 400
 401         if ((buf = ibuf = DSOUND_tmpbuffer(dsb->dsound->device, len)) == NULL)
 402                 return 0;
 403
 404         TRACE("MixInBuffer (%p) len = %d, dest = %ld\n", dsb, len, writepos);
 405
 406         ilen = DSOUND_MixerNorm(dsb, ibuf, len);
 407         if ((dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) ||
 408             (dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) ||
 409             (dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
 410                 DSOUND_MixerVol(dsb, ibuf, len);
 411
 412         if (dsb->dsound->device->pwfx->wBitsPerSample == 8) {
 413                 BYTE    *obuf = dsb->dsound->device->buffer + writepos;
 414
 415                 if ((writepos + len) <= dsb->dsound->device->buflen)
 416                         todo = len;
 417                 else
 418                         todo = dsb->dsound->device->buflen - writepos;
 419
 420                 for (i = 0; i < todo; i++) {
 421                         /* 8-bit WAV is unsigned */
 422                         field = (*ibuf++ - 128);
 423                         field += (*obuf - 128);
 424                         if (field > 127) field = 127;
 425                         else if (field < -128) field = -128;
 426                         *obuf++ = field + 128;
 427                 }
 428
 429                 if (todo < len) {
 430                         todo = len - todo;
 431                         obuf = dsb->dsound->device->buffer;
 432
 433                         for (i = 0; i < todo; i++) {
 434                                 /* 8-bit WAV is unsigned */
 435                                 field = (*ibuf++ - 128);
 436                                 field += (*obuf - 128);
 437                                 if (field > 127) field = 127;
 438                                 else if (field < -128) field = -128;
 439                                 *obuf++ = field + 128;
 440                         }
 441                 }
 442         } else {
 443                 INT16   *ibufs, *obufs;
 444
 445                 ibufs = (INT16 *) ibuf;
 446                 obufs = (INT16 *)(dsb->dsound->device->buffer + writepos);
 447
 448                 if ((writepos + len) <= dsb->dsound->device->buflen)
 449                         todo = len / 2;
 450                 else
 451                         todo = (dsb->dsound->device->buflen - writepos) / 2;
 452
 453                 for (i = 0; i < todo; i++) {
 454                         /* 16-bit WAV is signed */
 455                         field = *ibufs++;
 456                         field += *obufs;
 457                         if (field > 32767) field = 32767;
 458                         else if (field < -32768) field = -32768;
 459                         *obufs++ = field;
 460                 }
 461
 462                 if (todo < (len / 2)) {
 463                         todo = (len / 2) - todo;
 464                         obufs = (INT16 *)dsb->dsound->device->buffer;
 465
 466                         for (i = 0; i < todo; i++) {
 467                                 /* 16-bit WAV is signed */
 468                                 field = *ibufs++;
 469                                 field += *obufs;
 470                                 if (field > 32767) field = 32767;
 471                                 else if (field < -32768) field = -32768;
 472                                 *obufs++ = field;
 473                         }
 474                 }
 475         }
 476
 477         if (dsb->leadin && (dsb->startpos > dsb->buf_mixpos) && (dsb->startpos <= dsb->buf_mixpos + ilen)) {
 478                 /* HACK... leadin should be reset when the PLAY position reaches the startpos,
 479                  * not the MIX position... but if the sound buffer is bigger than our prebuffering
 480                  * (which must be the case for the streaming buffers that need this hack anyway)
 481                  * plus DS_HEL_MARGIN or equivalent, then this ought to work anyway. */
 482                 dsb->leadin = FALSE;
 483         }
 484
 485         dsb->buf_mixpos += ilen;
 486
 487         if (dsb->buf_mixpos >= dsb->buflen) {
 488                 if (dsb->playflags & DSBPLAY_LOOPING) {
 489                         /* wrap */
 490                         dsb->buf_mixpos %= dsb->buflen;
 491                         if (dsb->leadin && (dsb->startpos <= dsb->buf_mixpos))
 492                                 dsb->leadin = FALSE; /* HACK: see above */
 493                 }
 494         }
 495
 496         return len;
 497 }
 498
 499 static void DSOUND_PhaseCancel(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD len)
 500 {
 501         INT     ilen, field;
 502         UINT    i, todo;
 503         BYTE    *buf, *ibuf;
 504
 505         TRACE("(%p,%ld,%ld)\n",dsb,writepos,len);
 506
 507         if (len % dsb->dsound->device->pwfx->nBlockAlign) {
 508                 INT nBlockAlign = dsb->dsound->device->pwfx->nBlockAlign;
 509                 ERR("length not a multiple of block size, len = %ld, block size = %d\n", len, nBlockAlign);
 510                 len = (len / nBlockAlign) * nBlockAlign;        /* data alignment */
 511         }
 512
 513         if ((buf = ibuf = DSOUND_tmpbuffer(dsb->dsound->device, len)) == NULL)
 514                 return;
 515
 516         TRACE("PhaseCancel (%p) len = %ld, dest = %ld\n", dsb, len, writepos);
 517
 518         ilen = DSOUND_MixerNorm(dsb, ibuf, len);
 519         if ((dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) ||
 520             (dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) ||
 521             (dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
 522                 DSOUND_MixerVol(dsb, ibuf, len);
 523
 524         /* subtract instead of add, to phase out premixed data */
 525         if (dsb->dsound->device->pwfx->wBitsPerSample == 8) {
 526                 BYTE    *obuf = dsb->dsound->device->buffer + writepos;
 527
 528                 if ((writepos + len) <= dsb->dsound->device->buflen)
 529                         todo = len;
 530                 else
 531                         todo = dsb->dsound->device->buflen - writepos;
 532
 533                 for (i = 0; i < todo; i++) {
 534                         /* 8-bit WAV is unsigned */
 535                         field = (*ibuf++ - 128);
 536                         field -= (*obuf - 128);
 537                         if (field > 127) field = 127;
 538                         else if (field < -128) field = -128;
 539                         *obuf++ = field + 128;
 540                 }
 541
 542                 if (todo < len) {
 543                         todo = len - todo;
 544                         obuf = dsb->dsound->device->buffer;
 545
 546                         for (i = 0; i < todo; i++) {
 547                                 /* 8-bit WAV is unsigned */
 548                                 field = (*ibuf++ - 128);
 549                                 field -= (*obuf - 128);
 550                                 if (field > 127) field = 127;
 551                                 else if (field < -128) field = -128;
 552                                 *obuf++ = field + 128;
 553                         }
 554                 }
 555         } else {
 556                 INT16   *ibufs, *obufs;
 557
 558                 ibufs = (INT16 *) ibuf;
 559                 obufs = (INT16 *)(dsb->dsound->device->buffer + writepos);
 560
 561                 if ((writepos + len) <= dsb->dsound->device->buflen)
 562                         todo = len / 2;
 563                 else
 564                         todo = (dsb->dsound->device->buflen - writepos) / 2;
 565
 566                 for (i = 0; i < todo; i++) {
 567                         /* 16-bit WAV is signed */
 568                         field = *ibufs++;
 569                         field -= *obufs;
 570                         if (field > 32767) field = 32767;
 571                         else if (field < -32768) field = -32768;
 572                         *obufs++ = field;
 573                 }
 574
 575                 if (todo < (len / 2)) {
 576                         todo = (len / 2) - todo;
 577                         obufs = (INT16 *)dsb->dsound->device->buffer;
 578
 579                         for (i = 0; i < todo; i++) {
 580                                 /* 16-bit WAV is signed */
 581                                 field = *ibufs++;
 582                                 field -= *obufs;
 583                                 if (field > 32767) field = 32767;
 584                                 else if (field < -32768) field = -32768;
 585                                 *obufs++ = field;
 586                         }
 587                 }
 588         }
 589 }
 590
 591 static void DSOUND_MixCancel(IDirectSoundBufferImpl *dsb, DWORD writepos, BOOL cancel)
 592 {
 593         DWORD   size, flen, len, npos, nlen;
 594         INT     iAdvance = dsb->pwfx->nBlockAlign;
 595         INT     oAdvance = dsb->dsound->device->pwfx->nBlockAlign;
 596         /* determine amount of premixed data to cancel */
 597         DWORD primary_done =
 598                 ((dsb->primary_mixpos < writepos) ? dsb->dsound->device->buflen : 0) +
 599                 dsb->primary_mixpos - writepos;
 600
 601         TRACE("(%p, %ld), buf_mixpos=%ld\n", dsb, writepos, dsb->buf_mixpos);
 602
 603         /* backtrack the mix position */
 604         size = primary_done / oAdvance;
 605         flen = size * dsb->freqAdjust;
 606         len = (flen >> DSOUND_FREQSHIFT) * iAdvance;
 607         flen &= (1<<DSOUND_FREQSHIFT)-1;
 608         while (dsb->freqAcc < flen) {
 609                 len += iAdvance;
 610                 dsb->freqAcc += 1<<DSOUND_FREQSHIFT;
 611         }
 612         len %= dsb->buflen;
 613         npos = ((dsb->buf_mixpos < len) ? dsb->buflen : 0) +
 614                 dsb->buf_mixpos - len;
 615         if (dsb->leadin && (dsb->startpos > npos) && (dsb->startpos <= npos + len)) {
 616                 /* stop backtracking at startpos */
 617                 npos = dsb->startpos;
 618                 len = ((dsb->buf_mixpos < npos) ? dsb->buflen : 0) +
 619                         dsb->buf_mixpos - npos;
 620                 flen = dsb->freqAcc;
 621                 nlen = len / dsb->pwfx->nBlockAlign;
 622                 nlen = ((nlen << DSOUND_FREQSHIFT) + flen) / dsb->freqAdjust;
 623                 nlen *= dsb->dsound->device->pwfx->nBlockAlign;
 624                 writepos =
 625                         ((dsb->primary_mixpos < nlen) ? dsb->dsound->device->buflen : 0) +
 626                         dsb->primary_mixpos - nlen;
 627         }
 628
 629         dsb->freqAcc -= flen;
 630         dsb->buf_mixpos = npos;
 631         dsb->primary_mixpos = writepos;
 632
 633         TRACE("new buf_mixpos=%ld, primary_mixpos=%ld (len=%ld)\n",
 634               dsb->buf_mixpos, dsb->primary_mixpos, len);
 635
 636         if (cancel) DSOUND_PhaseCancel(dsb, writepos, len);
 637 }
 638
 639 void DSOUND_MixCancelAt(IDirectSoundBufferImpl *dsb, DWORD buf_writepos)
 640 {
 641 #if 0
 642         DWORD   i, size, flen, len, npos, nlen;
 643         INT     iAdvance = dsb->pwfx->nBlockAlign;
 644         INT     oAdvance = dsb->dsound->device->pwfx->nBlockAlign;
 645         /* determine amount of premixed data to cancel */
 646         DWORD buf_done =
 647                 ((dsb->buf_mixpos < buf_writepos) ? dsb->buflen : 0) +
 648                 dsb->buf_mixpos - buf_writepos;
 649 #endif
 650
 651         WARN("(%p, %ld), buf_mixpos=%ld\n", dsb, buf_writepos, dsb->buf_mixpos);
 652         /* since this is not implemented yet, just cancel *ALL* prebuffering for now
 653          * (which is faster anyway when there's only a single secondary buffer) */
 654         dsb->dsound->device->need_remix = TRUE;
 655 }
 656
 657 void DSOUND_ForceRemix(IDirectSoundBufferImpl *dsb)
 658 {
 659         TRACE("(%p)\n",dsb);
 660         EnterCriticalSection(&dsb->lock);
 661         if (dsb->state == STATE_PLAYING)
 662                 dsb->dsound->device->need_remix = TRUE;
 663         LeaveCriticalSection(&dsb->lock);
 664 }
 665
 666 static DWORD DSOUND_MixOne(IDirectSoundBufferImpl *dsb, DWORD playpos, DWORD writepos, DWORD mixlen)
 667 {
 668         DWORD len, slen;
 669         /* determine this buffer's write position */
 670         DWORD buf_writepos = DSOUND_CalcPlayPosition(dsb, writepos, writepos);
 671         /* determine how much already-mixed data exists */
 672         DWORD buf_done =
 673                 ((dsb->buf_mixpos < buf_writepos) ? dsb->buflen : 0) +
 674                 dsb->buf_mixpos - buf_writepos;
 675         DWORD primary_done =
 676                 ((dsb->primary_mixpos < writepos) ? dsb->dsound->device->buflen : 0) +
 677                 dsb->primary_mixpos - writepos;
 678         DWORD adv_done =
 679                 ((dsb->dsound->device->mixpos < writepos) ? dsb->dsound->device->buflen : 0) +
 680                 dsb->dsound->device->mixpos - writepos;
 681         DWORD played =
 682                 ((buf_writepos < dsb->playpos) ? dsb->buflen : 0) +
 683                 buf_writepos - dsb->playpos;
 684         DWORD buf_left = dsb->buflen - buf_writepos;
 685         int still_behind;
 686
 687         TRACE("(%p,%ld,%ld,%ld)\n",dsb,playpos,writepos,mixlen);
 688         TRACE("buf_writepos=%ld, primary_writepos=%ld\n", buf_writepos, writepos);
 689         TRACE("buf_done=%ld, primary_done=%ld\n", buf_done, primary_done);
 690         TRACE("buf_mixpos=%ld, primary_mixpos=%ld, mixlen=%ld\n", dsb->buf_mixpos, dsb->primary_mixpos,
 691               mixlen);
 692         TRACE("looping=%ld, startpos=%ld, leadin=%ld\n", dsb->playflags, dsb->startpos, dsb->leadin);
 693
 694         /* check for notification positions */
 695         if (dsb->dsbd.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY &&
 696             dsb->state != STATE_STARTING) {
 697                 DSOUND_CheckEvent(dsb, played);
 698         }
 699
 700         /* save write position for non-GETCURRENTPOSITION2... */
 701         dsb->playpos = buf_writepos;
 702
 703         /* check whether CalcPlayPosition detected a mixing underrun */
 704         if ((buf_done == 0) && (dsb->primary_mixpos != writepos)) {
 705                 /* it did, but did we have more to play? */
 706                 if ((dsb->playflags & DSBPLAY_LOOPING) ||
 707                     (dsb->buf_mixpos < dsb->buflen)) {
 708                         /* yes, have to recover */
 709                         ERR("underrun on sound buffer %p\n", dsb);
 710                         TRACE("recovering from underrun: primary_mixpos=%ld\n", writepos);
 711                 }
 712                 dsb->primary_mixpos = writepos;
 713                 primary_done = 0;
 714         }
 715         /* determine how far ahead we should mix */
 716         if (((dsb->playflags & DSBPLAY_LOOPING) ||
 717              (dsb->leadin && (dsb->probably_valid_to != 0))) &&
 718             !(dsb->dsbd.dwFlags & DSBCAPS_STATIC)) {
 719                 /* if this is a streaming buffer, it typically means that
 720                  * we should defer mixing past probably_valid_to as long
 721                  * as we can, to avoid unnecessary remixing */
 722                 /* the heavy-looking calculations shouldn't be that bad,
 723                  * as any game isn't likely to be have more than 1 or 2
 724                  * streaming buffers in use at any time anyway... */
 725                 DWORD probably_valid_left =
 726                         (dsb->probably_valid_to == (DWORD)-1) ? dsb->buflen :
 727                         ((dsb->probably_valid_to < buf_writepos) ? dsb->buflen : 0) +
 728                         dsb->probably_valid_to - buf_writepos;
 729                 /* check for leadin condition */
 730                 if ((probably_valid_left == 0) &&
 731                     (dsb->probably_valid_to == dsb->startpos) &&
 732                     dsb->leadin)
 733                         probably_valid_left = dsb->buflen;
 734                 TRACE("streaming buffer probably_valid_to=%ld, probably_valid_left=%ld\n",
 735                       dsb->probably_valid_to, probably_valid_left);
 736                 /* check whether the app's time is already up */
 737                 if (probably_valid_left < dsb->writelead) {
 738                         WARN("probably_valid_to now within writelead, possible streaming underrun\n");
 739                         /* once we pass the point of no return,
 740                          * no reason to hold back anymore */
 741                         dsb->probably_valid_to = (DWORD)-1;
 742                         /* we just have to go ahead and mix what we have,
 743                          * there's no telling what the app is thinking anyway */
 744                 } else {
 745                         /* adjust for our frequency and our sample size */
 746                         probably_valid_left = MulDiv(probably_valid_left,
 747                                                      1 << DSOUND_FREQSHIFT,
 748                                                      dsb->pwfx->nBlockAlign * dsb->freqAdjust) *
 749                                               dsb->dsound->device->pwfx->nBlockAlign;
 750                         /* check whether to clip mix_len */
 751                         if (probably_valid_left < mixlen) {
 752                                 TRACE("clipping to probably_valid_left=%ld\n", probably_valid_left);
 753                                 mixlen = probably_valid_left;
 754                         }
 755                 }
 756         }
 757         /* cut mixlen with what's already been mixed */
 758         if (mixlen < primary_done) {
 759                 /* huh? and still CalcPlayPosition didn't
 760                  * detect an underrun? */
 761                 FIXME("problem with underrun detection (mixlen=%ld < primary_done=%ld)\n", mixlen, primary_done);
 762                 return 0;
 763         }
 764         len = mixlen - primary_done;
 765         TRACE("remaining mixlen=%ld\n", len);
 766
 767         if (len < dsb->dsound->device->fraglen) {
 768                 /* smaller than a fragment, wait until it gets larger
 769                  * before we take the mixing overhead */
 770                 TRACE("mixlen not worth it, deferring mixing\n");
 771                 still_behind = 1;
 772                 goto post_mix;
 773         }
 774
 775         /* ok, we know how much to mix, let's go */
 776         still_behind = (adv_done > primary_done);
 777         while (len) {
 778                 slen = dsb->dsound->device->buflen - dsb->primary_mixpos;
 779                 if (slen > len) slen = len;
 780                 slen = DSOUND_MixInBuffer(dsb, dsb->primary_mixpos, slen);
 781
 782                 if ((dsb->primary_mixpos < dsb->dsound->device->mixpos) &&
 783                     (dsb->primary_mixpos + slen >= dsb->dsound->device->mixpos))
 784                         still_behind = FALSE;
 785
 786                 dsb->primary_mixpos += slen; len -= slen;
 787                 dsb->primary_mixpos %= dsb->dsound->device->buflen;
 788
 789                 if ((dsb->state == STATE_STOPPED) || !slen) break;
 790         }
 791         TRACE("new primary_mixpos=%ld, primary_advbase=%ld\n", dsb->primary_mixpos, dsb->dsound->device->mixpos);
 792         TRACE("mixed data len=%ld, still_behind=%d\n", mixlen-len, still_behind);
 793
 794 post_mix:
 795         /* check if buffer should be considered complete */
 796         if (buf_left < dsb->writelead &&
 797             !(dsb->playflags & DSBPLAY_LOOPING)) {
 798                 dsb->state = STATE_STOPPED;
 799                 dsb->playpos = 0;
 800                 dsb->last_playpos = 0;
 801                 dsb->buf_mixpos = 0;
 802                 dsb->leadin = FALSE;
 803                 dsb->need_remix = FALSE;
 804                 DSOUND_CheckEvent(dsb, buf_left);
 805         }
 806
 807         /* return how far we think the primary buffer can
 808          * advance its underrun detector...*/
 809         if (still_behind) return 0;
 810         if ((mixlen - len) < primary_done) return 0;
 811         slen = ((dsb->primary_mixpos < dsb->dsound->device->mixpos) ?
 812                 dsb->dsound->device->buflen : 0) + dsb->primary_mixpos -
 813                 dsb->dsound->device->mixpos;
 814         if (slen > mixlen) {
 815                 /* the primary_done and still_behind checks above should have worked */
 816                 FIXME("problem with advancement calculation (advlen=%ld > mixlen=%ld)\n", slen, mixlen);
 817                 slen = 0;
 818         }
 819         return slen;
 820 }
 821
 822 static DWORD DSOUND_MixToPrimary(DirectSoundDevice *device, DWORD playpos, DWORD writepos, DWORD mixlen, BOOL recover)
 823 {
 824         INT                     i, len, maxlen = 0;
 825         IDirectSoundBufferImpl  *dsb;
 826
 827         TRACE("(%ld,%ld,%ld,%d)\n", playpos, writepos, mixlen, recover);
 828         for (i = 0; i < device->nrofbuffers; i++) {
 829                 dsb = device->buffers[i];
 830
 831                 if (dsb->buflen && dsb->state && !dsb->hwbuf) {
 832                         TRACE("Checking %p, mixlen=%ld\n", dsb, mixlen);
 833                         EnterCriticalSection(&(dsb->lock));
 834                         if (dsb->state == STATE_STOPPING) {
 835                                 DSOUND_MixCancel(dsb, writepos, TRUE);
 836                                 dsb->state = STATE_STOPPED;
 837                                 DSOUND_CheckEvent(dsb, 0);
 838                         } else {
 839                                 if ((dsb->state == STATE_STARTING) || recover) {
 840                                         dsb->primary_mixpos = writepos;
 841                                         dsb->cvolpan = dsb->volpan;
 842                                         dsb->need_remix = FALSE;
 843                                 }
 844                                 else if (dsb->need_remix) {
 845                                         DSOUND_MixCancel(dsb, writepos, TRUE);
 846                                         dsb->cvolpan = dsb->volpan;
 847                                         dsb->need_remix = FALSE;
 848                                 }
 849                                 len = DSOUND_MixOne(dsb, playpos, writepos, mixlen);
 850                                 if (dsb->state == STATE_STARTING)
 851                                         dsb->state = STATE_PLAYING;
 852                                 maxlen = (len > maxlen) ? len : maxlen;
 853                         }
 854                         LeaveCriticalSection(&(dsb->lock));
 855                 }
 856         }
 857
 858         return maxlen;
 859 }
 860
 861 static void DSOUND_MixReset(DirectSoundDevice *device, DWORD writepos)
 862 {
 863         INT                     i;
 864         IDirectSoundBufferImpl  *dsb;
 865         int nfiller;
 866
 867         TRACE("(%p,%ld)\n", device, writepos);
 868
 869         /* the sound of silence */
 870         nfiller = device->pwfx->wBitsPerSample == 8 ? 128 : 0;
 871
 872         /* reset all buffer mix positions */
 873         for (i = 0; i < device->nrofbuffers; i++) {
 874                 dsb = device->buffers[i];
 875
 876                 if (dsb->buflen && dsb->state && !dsb->hwbuf) {
 877                         TRACE("Resetting %p\n", dsb);
 878                         EnterCriticalSection(&(dsb->lock));
 879                         if (dsb->state == STATE_STOPPING) {
 880                                 dsb->state = STATE_STOPPED;
 881                         }
 882                         else if (dsb->state == STATE_STARTING) {
 883                                 /* nothing */
 884                         } else {
 885                                 DSOUND_MixCancel(dsb, writepos, FALSE);
 886                                 dsb->cvolpan = dsb->volpan;
 887                                 dsb->need_remix = FALSE;
 888                         }
 889                         LeaveCriticalSection(&(dsb->lock));
 890                 }
 891         }
 892
 893         /* wipe out premixed data */
 894         if (device->mixpos < writepos) {
 895                 FillMemory(device->buffer + writepos, device->buflen - writepos, nfiller);
 896                 FillMemory(device->buffer, device->mixpos, nfiller);
 897         } else {
 898                 FillMemory(device->buffer + writepos, device->mixpos - writepos, nfiller);
 899         }
 900
 901         /* reset primary mix position */
 902         device->mixpos = writepos;
 903 }
 904
 905 static void DSOUND_CheckReset(DirectSoundDevice *device, DWORD writepos)
 906 {
 907         TRACE("(%p,%ld)\n",device,writepos);
 908         if (device->need_remix) {
 909                 DSOUND_MixReset(device, writepos);
 910                 device->need_remix = FALSE;
 911                 /* maximize Half-Life performance */
 912                 device->prebuf = ds_snd_queue_min;
 913                 device->precount = 0;
 914         } else {
 915                 device->precount++;
 916                 if (device->precount >= 4) {
 917                         if (device->prebuf < ds_snd_queue_max)
 918                                 device->prebuf++;
 919                         device->precount = 0;
 920                 }
 921         }
 922         TRACE("premix adjust: %d\n", device->prebuf);
 923 }
 924
 925 void DSOUND_WaveQueue(DirectSoundDevice *device, DWORD mixq)
 926 {
 927         TRACE("(%p,%ld)\n", device, mixq);
 928         if (mixq + device->pwqueue > ds_hel_queue) mixq = ds_hel_queue - device->pwqueue;
 929         TRACE("queueing %ld buffers, starting at %d\n", mixq, device->pwwrite);
 930         for (; mixq; mixq--) {
 931                 waveOutWrite(device->hwo, device->pwave[device->pwwrite], sizeof(WAVEHDR));
 932                 device->pwwrite++;
 933                 if (device->pwwrite >= DS_HEL_FRAGS) device->pwwrite = 0;
 934                 device->pwqueue++;
 935         }
 936 }
 937
 938 /* #define SYNC_CALLBACK */
 939
 940 void DSOUND_PerformMix(DirectSoundDevice *device)
 941 {
 942         int nfiller;
 943         BOOL forced;
 944         HRESULT hres;
 945
 946         TRACE("(%p)\n", device);
 947
 948         /* the sound of silence */
 949         nfiller = device->pwfx->wBitsPerSample == 8 ? 128 : 0;
 950
 951         /* whether the primary is forced to play even without secondary buffers */
 952         forced = ((device->state == STATE_PLAYING) || (device->state == STATE_STARTING));
 953
 954         if (device->priolevel != DSSCL_WRITEPRIMARY) {
 955                 BOOL paused = ((device->state == STATE_STOPPED) || (device->state == STATE_STARTING));
 956                 /* FIXME: document variables */
 957                 DWORD playpos, writepos, inq, maxq, frag;
 958                 if (device->hwbuf) {
 959                         hres = IDsDriverBuffer_GetPosition(device->hwbuf, &playpos, &writepos);
 960                         if (hres) {
 961                             WARN("IDsDriverBuffer_GetPosition failed\n");
 962                             return;
 963                         }
 964                         /* Well, we *could* do Just-In-Time mixing using the writepos,
 965                          * but that's a little bit ambitious and unnecessary... */
 966                         /* rather add our safety margin to the writepos, if we're playing */
 967                         if (!paused) {
 968                                 writepos += device->writelead;
 969                                 writepos %= device->buflen;
 970                         } else writepos = playpos;
 971                 } else {
 972                         playpos = device->pwplay * device->fraglen;
 973                         writepos = playpos;
 974                         if (!paused) {
 975                                 writepos += ds_hel_margin * device->fraglen;
 976                                 writepos %= device->buflen;
 977                         }
 978                 }
 979                 TRACE("primary playpos=%ld, writepos=%ld, clrpos=%ld, mixpos=%ld, buflen=%ld\n",
 980                       playpos,writepos,device->playpos,device->mixpos,device->buflen);
 981                 assert(device->playpos < device->buflen);
 982                 /* wipe out just-played sound data */
 983                 if (playpos < device->playpos) {
 984                         FillMemory(device->buffer + device->playpos, device->buflen - device->playpos, nfiller);
 985                         FillMemory(device->buffer, playpos, nfiller);
 986                 } else {
 987                         FillMemory(device->buffer + device->playpos, playpos - device->playpos, nfiller);
 988                 }
 989                 device->playpos = playpos;
 990
 991                 EnterCriticalSection(&(device->mixlock));
 992
 993                 /* reset mixing if necessary */
 994                 DSOUND_CheckReset(device, writepos);
 995
 996                 /* check how much prebuffering is left */
 997                 inq = device->mixpos;
 998                 if (inq < writepos)
 999                         inq += device->buflen;
1000                 inq -= writepos;
1001
1002                 /* find the maximum we can prebuffer */
1003                 if (!paused) {
1004                         maxq = playpos;
1005                         if (maxq < writepos)
1006                                 maxq += device->buflen;
1007                         maxq -= writepos;
1008                 } else maxq = device->buflen;
1009
1010                 /* clip maxq to device->prebuf */
1011                 frag = device->prebuf * device->fraglen;
1012                 if (maxq > frag) maxq = frag;
1013
1014                 /* check for consistency */
1015                 if (inq > maxq) {
1016                         /* the playback position must have passed our last
1017                          * mixed position, i.e. it's an underrun, or we have
1018                          * nothing more to play */
1019                         TRACE("reached end of mixed data (inq=%ld, maxq=%ld)\n", inq, maxq);
1020                         inq = 0;
1021                         /* stop the playback now, to allow buffers to refill */
1022                         if (device->state == STATE_PLAYING) {
1023                                 device->state = STATE_STARTING;
1024                         }
1025                         else if (device->state == STATE_STOPPING) {
1026                                 device->state = STATE_STOPPED;
1027                         }
1028                         else {
1029                                 /* how can we have an underrun if we aren't playing? */
1030                                 WARN("unexpected primary state (%ld)\n", device->state);
1031                         }
1032 #ifdef SYNC_CALLBACK
1033                         /* DSOUND_callback may need this lock */
1034                         LeaveCriticalSection(&(device->mixlock));
1035 #endif
1036                         if (DSOUND_PrimaryStop(device) != DS_OK)
1037                                 WARN("DSOUND_PrimaryStop failed\n");
1038 #ifdef SYNC_CALLBACK
1039                         EnterCriticalSection(&(device->mixlock));
1040 #endif
1041                         if (device->hwbuf) {
1042                                 /* the Stop is supposed to reset play position to beginning of buffer */
1043                                 /* unfortunately, OSS is not able to do so, so get current pointer */
1044                                 hres = IDsDriverBuffer_GetPosition(device->hwbuf, &playpos, NULL);
1045                                 if (hres) {
1046                                         LeaveCriticalSection(&(device->mixlock));
1047                                         WARN("IDsDriverBuffer_GetPosition failed\n");
1048                                         return;
1049                                 }
1050                         } else {
1051                                 playpos = device->pwplay * device->fraglen;
1052                         }
1053                         writepos = playpos;
1054                         device->playpos = playpos;
1055                         device->mixpos = writepos;
1056                         inq = 0;
1057                         maxq = device->buflen;
1058                         if (maxq > frag) maxq = frag;
1059                         FillMemory(device->buffer, device->buflen, nfiller);
1060                         paused = TRUE;
1061                 }
1062
1063                 /* do the mixing */
1064                 frag = DSOUND_MixToPrimary(device, playpos, writepos, maxq, paused);
1065                 if (forced) frag = maxq - inq;
1066                 device->mixpos += frag;
1067                 device->mixpos %= device->buflen;
1068
1069                 if (frag) {
1070                         /* buffers have been filled, restart playback */
1071                         if (device->state == STATE_STARTING) {
1072                                 device->state = STATE_PLAYING;
1073                         }
1074                         else if (device->state == STATE_STOPPED) {
1075                                 /* the dsound is supposed to play if there's something to play
1076                                  * even if it is reported as stopped, so don't let this confuse you */
1077                                 device->state = STATE_STOPPING;
1078                         }
1079                         LeaveCriticalSection(&(device->mixlock));
1080                         if (paused) {
1081                                 if (DSOUND_PrimaryPlay(device) != DS_OK)
1082                                         WARN("DSOUND_PrimaryPlay failed\n");
1083                                 else
1084                                         TRACE("starting playback\n");
1085                         }
1086                 }
1087                 else
1088                         LeaveCriticalSection(&(device->mixlock));
1089         } else {
1090                 /* in the DSSCL_WRITEPRIMARY mode, the app is totally in charge... */
1091                 if (device->state == STATE_STARTING) {
1092                         if (DSOUND_PrimaryPlay(device) != DS_OK)
1093                                 WARN("DSOUND_PrimaryPlay failed\n");
1094                         else
1095                                 device->state = STATE_PLAYING;
1096                 }
1097                 else if (device->state == STATE_STOPPING) {
1098                         if (DSOUND_PrimaryStop(device) != DS_OK)
1099                                 WARN("DSOUND_PrimaryStop failed\n");
1100                         else
1101                                 device->state = STATE_STOPPED;
1102                 }
1103         }
1104 }
1105
1106 void CALLBACK DSOUND_timer(UINT timerID, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2)
1107 {
1108         DirectSoundDevice * device = (DirectSoundDevice*)dwUser;
1109         DWORD start_time =  GetTickCount();
1110         DWORD end_time;
1111         TRACE("(%d,%d,0x%lx,0x%lx,0x%lx)\n",timerID,msg,dwUser,dw1,dw2);
1112         TRACE("entering at %ld\n", start_time);
1113
1114         if (DSOUND_renderer[device->drvdesc.dnDevNode] != device) {
1115                 ERR("dsound died without killing us?\n");
1116                 timeKillEvent(timerID);
1117                 timeEndPeriod(DS_TIME_RES);
1118                 return;
1119         }
1120
1121         RtlAcquireResourceShared(&(device->buffer_list_lock), TRUE);
1122
1123         if (device->ref)
1124                 DSOUND_PerformMix(device);
1125
1126         RtlReleaseResource(&(device->buffer_list_lock));
1127
1128         end_time = GetTickCount();
1129         TRACE("completed processing at %ld, duration = %ld\n", end_time, end_time - start_time);
1130 }
1131
1132 void CALLBACK DSOUND_callback(HWAVEOUT hwo, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2)
1133 {
1134         DirectSoundDevice * device = (DirectSoundDevice*)dwUser;
1135         TRACE("(%p,%x,%lx,%lx,%lx)\n",hwo,msg,dwUser,dw1,dw2);
1136         TRACE("entering at %ld, msg=%08x(%s)\n", GetTickCount(), msg,
1137                 msg==MM_WOM_DONE ? "MM_WOM_DONE" : msg==MM_WOM_CLOSE ? "MM_WOM_CLOSE" :
1138                 msg==MM_WOM_OPEN ? "MM_WOM_OPEN" : "UNKNOWN");
1139         if (msg == MM_WOM_DONE) {
1140                 DWORD inq, mixq, fraglen, buflen, pwplay, playpos, mixpos;
1141                 if (device->pwqueue == (DWORD)-1) {
1142                         TRACE("completed due to reset\n");
1143                         return;
1144                 }
1145 /* it could be a bad idea to enter critical section here... if there's lock contention,
1146  * the resulting scheduling delays might obstruct the winmm player thread */
1147 #ifdef SYNC_CALLBACK
1148                 EnterCriticalSection(&(device->mixlock));
1149 #endif
1150                 /* retrieve current values */
1151                 fraglen = device->fraglen;
1152                 buflen = device->buflen;
1153                 pwplay = device->pwplay;
1154                 playpos = pwplay * fraglen;
1155                 mixpos = device->mixpos;
1156                 /* check remaining mixed data */
1157                 inq = ((mixpos < playpos) ? buflen : 0) + mixpos - playpos;
1158                 mixq = inq / fraglen;
1159                 if ((inq - (mixq * fraglen)) > 0) mixq++;
1160                 /* complete the playing buffer */
1161                 TRACE("done playing primary pos=%ld\n", playpos);
1162                 pwplay++;
1163                 if (pwplay >= DS_HEL_FRAGS) pwplay = 0;
1164                 /* write new values */
1165                 device->pwplay = pwplay;
1166                 device->pwqueue--;
1167                 /* queue new buffer if we have data for it */
1168                 if (inq>1) DSOUND_WaveQueue(device, inq-1);
1169 #ifdef SYNC_CALLBACK
1170                 LeaveCriticalSection(&(device->mixlock));
1171 #endif
1172         }
1173         TRACE("completed\n");
1174 }