dlls/dsound/primary.c

   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <stdarg.h>
  23
  24 #define NONAMELESSSTRUCT
  25 #define NONAMELESSUNION
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winuser.h"
  29 #include "mmsystem.h"
  30 #include "winreg.h"
  31 #include "winternl.h"
  32 #include "mmddk.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_RecalcPrimary(DirectSoundDevice *device)
  41 {
  42         DWORD nBlockAlign;
  43         TRACE("(%p)\n", device);
  44
  45         nBlockAlign = device->pwfx->nBlockAlign;
  46         if (device->hwbuf) {
  47                 DWORD fraglen;
  48                 /* let fragment size approximate the timer delay */
  49                 fraglen = (device->pwfx->nSamplesPerSec * DS_TIME_DEL / 1000) * nBlockAlign;
  50                 /* reduce fragment size until an integer number of them fits in the buffer */
  51                 /* (FIXME: this may or may not be a good idea) */
  52                 while (device->buflen % fraglen) fraglen -= nBlockAlign;
  53                 device->fraglen = fraglen;
  54                 TRACE("fraglen=%ld\n", device->fraglen);
  55         }
  56         /* calculate the 10ms write lead */
  57         device->writelead = (device->pwfx->nSamplesPerSec / 100) * nBlockAlign;
  58 }
  59
  60 static HRESULT DSOUND_PrimaryOpen(DirectSoundDevice *device)
  61 {
  62         HRESULT err = DS_OK;
  63         TRACE("(%p)\n", device);
  64
  65         /* are we using waveOut stuff? */
  66         if (!device->driver) {
  67                 LPBYTE newbuf;
  68                 DWORD buflen;
  69                 HRESULT merr = DS_OK;
  70                 /* Start in pause mode, to allow buffers to get filled */
  71                 waveOutPause(device->hwo);
  72                 if (device->state == STATE_PLAYING) device->state = STATE_STARTING;
  73                 else if (device->state == STATE_STOPPING) device->state = STATE_STOPPED;
  74                 /* use fragments of 10ms (1/100s) each (which should get us within
  75                  * the documented write cursor lead of 10-15ms) */
  76                 buflen = ((device->pwfx->nSamplesPerSec / 100) * device->pwfx->nBlockAlign) * DS_HEL_FRAGS;
  77                 TRACE("desired buflen=%ld, old buffer=%p\n", buflen, device->buffer);
  78                 /* reallocate emulated primary buffer */
  79
  80                 if (device->buffer)
  81                         newbuf = HeapReAlloc(GetProcessHeap(),0,device->buffer,buflen);
  82                 else
  83                         newbuf = HeapAlloc(GetProcessHeap(),0,buflen);
  84
  85                 if (newbuf == NULL) {
  86                         ERR("failed to allocate primary buffer\n");
  87                         merr = DSERR_OUTOFMEMORY;
  88                         /* but the old buffer might still exist and must be re-prepared */
  89                 } else {
  90                         device->buffer = newbuf;
  91                         device->buflen = buflen;
  92                 }
  93                 if (device->buffer) {
  94                         unsigned c;
  95
  96                         device->fraglen = device->buflen / DS_HEL_FRAGS;
  97
  98                         /* prepare fragment headers */
  99                         for (c=0; c<DS_HEL_FRAGS; c++) {
 100                                 device->pwave[c]->lpData = (char*)device->buffer + c*device->fraglen;
 101                                 device->pwave[c]->dwBufferLength = device->fraglen;
 102                                 device->pwave[c]->dwUser = (DWORD)device;
 103                                 device->pwave[c]->dwFlags = 0;
 104                                 device->pwave[c]->dwLoops = 0;
 105                                 err = mmErr(waveOutPrepareHeader(device->hwo,device->pwave[c],sizeof(WAVEHDR)));
 106                                 if (err != DS_OK) {
 107                                         while (c--)
 108                                                 waveOutUnprepareHeader(device->hwo,device->pwave[c],sizeof(WAVEHDR));
 109                                         break;
 110                                 }
 111                         }
 112
 113                         device->pwplay = 0;
 114                         device->pwwrite = 0;
 115                         device->pwqueue = 0;
 116                         device->playpos = 0;
 117                         device->mixpos = 0;
 118                         FillMemory(device->buffer, device->buflen, (device->pwfx->wBitsPerSample == 8) ? 128 : 0);
 119                         TRACE("fraglen=%ld\n", device->fraglen);
 120                         DSOUND_WaveQueue(device, (DWORD)-1);
 121                 }
 122                 if ((err == DS_OK) && (merr != DS_OK))
 123                         err = merr;
 124         } else if (!device->hwbuf) {
 125                 err = IDsDriver_CreateSoundBuffer(device->driver,device->pwfx,
 126                                                   DSBCAPS_PRIMARYBUFFER,0,
 127                                                   &(device->buflen),&(device->buffer),
 128                                                   (LPVOID*)&(device->hwbuf));
 129                 if (err != DS_OK) {
 130                         WARN("IDsDriver_CreateSoundBuffer failed\n");
 131                         return err;
 132                 }
 133
 134                 if (device->state == STATE_PLAYING) device->state = STATE_STARTING;
 135                 else if (device->state == STATE_STOPPING) device->state = STATE_STOPPED;
 136                 device->playpos = 0;
 137                 device->mixpos = 0;
 138                 FillMemory(device->buffer, device->buflen, (device->pwfx->wBitsPerSample == 8) ? 128 : 0);
 139         }
 140
 141         return err;
 142 }
 143
 144
 145 static void DSOUND_PrimaryClose(DirectSoundDevice *device)
 146 {
 147         TRACE("(%p)\n", device);
 148
 149         /* are we using waveOut stuff? */
 150         if (!device->hwbuf) {
 151                 unsigned c;
 152
 153                 device->pwqueue = (DWORD)-1; /* resetting queues */
 154                 waveOutReset(device->hwo);
 155                 for (c=0; c<DS_HEL_FRAGS; c++)
 156                         waveOutUnprepareHeader(device->hwo, device->pwave[c], sizeof(WAVEHDR));
 157                 device->pwqueue = 0;
 158         } else {
 159                 if (IDsDriverBuffer_Release(device->hwbuf) == 0)
 160                         device->hwbuf = 0;
 161         }
 162 }
 163
 164 HRESULT DSOUND_PrimaryCreate(DirectSoundDevice *device)
 165 {
 166         HRESULT err = DS_OK;
 167         TRACE("(%p)\n", device);
 168
 169         device->buflen = device->pwfx->nAvgBytesPerSec;
 170
 171         /* FIXME: verify that hardware capabilities (DSCAPS_PRIMARY flags) match */
 172
 173         if (device->driver) {
 174                 err = IDsDriver_CreateSoundBuffer(device->driver,device->pwfx,
 175                                                   DSBCAPS_PRIMARYBUFFER,0,
 176                                                   &(device->buflen),&(device->buffer),
 177                                                   (LPVOID*)&(device->hwbuf));
 178                 if (err != DS_OK) {
 179                         WARN("IDsDriver_CreateSoundBuffer failed\n");
 180                         return err;
 181                 }
 182         }
 183         if (!device->hwbuf) {
 184                 /* Allocate memory for HEL buffer headers */
 185                 unsigned c;
 186                 for (c=0; c<DS_HEL_FRAGS; c++) {
 187                         device->pwave[c] = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(WAVEHDR));
 188                         if (!device->pwave[c]) {
 189                                 /* Argh, out of memory */
 190                                 while (c--) {
 191                                         HeapFree(GetProcessHeap(),0,device->pwave[c]);
 192                                 }
 193                                 WARN("out of memory\n");
 194                                 return DSERR_OUTOFMEMORY;
 195                         }
 196                 }
 197         }
 198
 199         err = DSOUND_PrimaryOpen(device);
 200
 201         if (err != DS_OK) {
 202                 WARN("DSOUND_PrimaryOpen failed\n");
 203                 return err;
 204         }
 205
 206         /* calculate fragment size and write lead */
 207         DSOUND_RecalcPrimary(device);
 208         device->state = STATE_STOPPED;
 209         return DS_OK;
 210 }
 211
 212 HRESULT DSOUND_PrimaryDestroy(DirectSoundDevice *device)
 213 {
 214         TRACE("(%p)\n", device);
 215
 216         DSOUND_PrimaryClose(device);
 217         if (device->driver) {
 218                 if (device->hwbuf) {
 219                         if (IDsDriverBuffer_Release(device->hwbuf) == 0)
 220                                 device->hwbuf = 0;
 221                 }
 222         } else {
 223                 unsigned c;
 224                 for (c=0; c<DS_HEL_FRAGS; c++) {
 225                         HeapFree(GetProcessHeap(),0,device->pwave[c]);
 226                 }
 227         }
 228         HeapFree(GetProcessHeap(),0,device->pwfx);
 229         device->pwfx=NULL;
 230         return DS_OK;
 231 }
 232
 233 HRESULT DSOUND_PrimaryPlay(DirectSoundDevice *device)
 234 {
 235         HRESULT err = DS_OK;
 236         TRACE("(%p)\n", device);
 237
 238         if (device->hwbuf) {
 239                 err = IDsDriverBuffer_Play(device->hwbuf, 0, 0, DSBPLAY_LOOPING);
 240                 if (err != DS_OK)
 241                         WARN("IDsDriverBuffer_Play failed\n");
 242         } else {
 243                 err = mmErr(waveOutRestart(device->hwo));
 244                 if (err != DS_OK)
 245                         WARN("waveOutRestart failed\n");
 246         }
 247
 248         return err;
 249 }
 250
 251 HRESULT DSOUND_PrimaryStop(DirectSoundDevice *device)
 252 {
 253         HRESULT err = DS_OK;
 254         TRACE("(%p)\n", device);
 255
 256         if (device->hwbuf) {
 257                 err = IDsDriverBuffer_Stop(device->hwbuf);
 258                 if (err == DSERR_BUFFERLOST) {
 259                         DWORD flags = CALLBACK_FUNCTION;
 260                         if (ds_hw_accel != DS_HW_ACCEL_EMULATION)
 261                                 flags |= WAVE_DIRECTSOUND;
 262                         /* Wine-only: the driver wants us to reopen the device */
 263                         /* FIXME: check for errors */
 264                         IDsDriverBuffer_Release(device->hwbuf);
 265                         waveOutClose(device->hwo);
 266                         device->hwo = 0;
 267                         err = mmErr(waveOutOpen(&(device->hwo), device->drvdesc.dnDevNode,
 268                                                 device->pwfx, (DWORD_PTR)DSOUND_callback, (DWORD)device,
 269                                                 flags));
 270                         if (err == DS_OK) {
 271                                 err = IDsDriver_CreateSoundBuffer(device->driver,device->pwfx,
 272                                                                   DSBCAPS_PRIMARYBUFFER,0,
 273                                                                   &(device->buflen),&(device->buffer),
 274                                                                   (LPVOID)&(device->hwbuf));
 275                                 if (err != DS_OK)
 276                                         WARN("IDsDriver_CreateSoundBuffer failed\n");
 277                         } else {
 278                                 WARN("waveOutOpen failed\n");
 279                         }
 280                 } else if (err != DS_OK) {
 281                         WARN("IDsDriverBuffer_Stop failed\n");
 282                 }
 283         } else {
 284                 err = mmErr(waveOutPause(device->hwo));
 285                 if (err != DS_OK)
 286                         WARN("waveOutPause failed\n");
 287         }
 288         return err;
 289 }
 290
 291 HRESULT DSOUND_PrimaryGetPosition(DirectSoundDevice *device, LPDWORD playpos, LPDWORD writepos)
 292 {
 293         TRACE("(%p,%p,%p)\n", device, playpos, writepos);
 294
 295         if (device->hwbuf) {
 296                 HRESULT err=IDsDriverBuffer_GetPosition(device->hwbuf,playpos,writepos);
 297                 if (err) {
 298                         WARN("IDsDriverBuffer_GetPosition failed\n");
 299                         return err;
 300                 }
 301         } else {
 302                 if (playpos) {
 303                         MMTIME mtime;
 304                         mtime.wType = TIME_BYTES;
 305                         waveOutGetPosition(device->hwo, &mtime, sizeof(mtime));
 306                         mtime.u.cb = mtime.u.cb % device->buflen;
 307                         *playpos = mtime.u.cb;
 308                 }
 309                 if (writepos) {
 310                         /* the writepos should only be used by apps with WRITEPRIMARY priority,
 311                          * in which case our software mixer is disabled anyway */
 312                         *writepos = (device->pwplay + ds_hel_margin) * device->fraglen;
 313                         while (*writepos >= device->buflen)
 314                                 *writepos -= device->buflen;
 315                 }
 316         }
 317         TRACE("playpos = %ld, writepos = %ld (%p, time=%ld)\n", playpos?*playpos:0, writepos?*writepos:0, device, GetTickCount());
 318         return DS_OK;
 319 }
 320
 321 HRESULT DSOUND_PrimarySetFormat(DirectSoundDevice *device, LPCWAVEFORMATEX wfex)
 322 {
 323         HRESULT err = DS_OK;
 324         int i, alloc_size, cp_size;
 325         DWORD nSamplesPerSec;
 326         TRACE("(%p,%p)\n", device, wfex);
 327
 328         if (device->priolevel == DSSCL_NORMAL) {
 329                 WARN("failed priority check!\n");
 330                 return DSERR_PRIOLEVELNEEDED;
 331         }
 332
 333         /* Let's be pedantic! */
 334         if (wfex == NULL) {
 335                 WARN("invalid parameter: wfex==NULL!\n");
 336                 return DSERR_INVALIDPARAM;
 337         }
 338         TRACE("(formattag=0x%04x,chans=%d,samplerate=%ld,"
 339               "bytespersec=%ld,blockalign=%d,bitspersamp=%d,cbSize=%d)\n",
 340               wfex->wFormatTag, wfex->nChannels, wfex->nSamplesPerSec,
 341               wfex->nAvgBytesPerSec, wfex->nBlockAlign,
 342               wfex->wBitsPerSample, wfex->cbSize);
 343
 344         /* **** */
 345         RtlAcquireResourceExclusive(&(device->buffer_list_lock), TRUE);
 346         EnterCriticalSection(&(device->mixlock));
 347
 348         if (wfex->wFormatTag == WAVE_FORMAT_PCM) {
 349             alloc_size = sizeof(WAVEFORMATEX);
 350             cp_size = sizeof(PCMWAVEFORMAT);
 351         } else
 352             alloc_size = cp_size = sizeof(WAVEFORMATEX) + wfex->cbSize;
 353
 354         device->pwfx = HeapReAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,device->pwfx,alloc_size);
 355
 356         nSamplesPerSec = device->pwfx->nSamplesPerSec;
 357
 358         CopyMemory(device->pwfx, wfex, cp_size);
 359
 360         if (device->drvdesc.dwFlags & DSDDESC_DOMMSYSTEMSETFORMAT) {
 361                 DWORD flags = CALLBACK_FUNCTION;
 362                 if (ds_hw_accel != DS_HW_ACCEL_EMULATION)
 363                         flags |= WAVE_DIRECTSOUND;
 364                 /* FIXME: check for errors */
 365                 DSOUND_PrimaryClose(device);
 366                 waveOutClose(device->hwo);
 367                 device->hwo = 0;
 368                 err = mmErr(waveOutOpen(&(device->hwo), device->drvdesc.dnDevNode,
 369                                         device->pwfx, (DWORD_PTR)DSOUND_callback, (DWORD)device,
 370                                         flags));
 371                 if (err == DS_OK) {
 372                     err = DSOUND_PrimaryOpen(device);
 373                     if (err != DS_OK) {
 374                         WARN("DSOUND_PrimaryOpen failed\n");
 375                         goto done;
 376                     }
 377                 } else {
 378                         WARN("waveOutOpen failed\n");
 379                         goto done;
 380                 }
 381         } else if (device->hwbuf) {
 382                 err = IDsDriverBuffer_SetFormat(device->hwbuf, device->pwfx);
 383                 if (err == DSERR_BUFFERLOST) {
 384                         /* Wine-only: the driver wants us to recreate the HW buffer */
 385                         IDsDriverBuffer_Release(device->hwbuf);
 386                         err = IDsDriver_CreateSoundBuffer(device->driver,device->pwfx,
 387                                                           DSBCAPS_PRIMARYBUFFER,0,
 388                                                           &(device->buflen),&(device->buffer),
 389                                                           (LPVOID)&(device->hwbuf));
 390                         if (err != DS_OK) {
 391                                 WARN("IDsDriver_CreateSoundBuffer failed\n");
 392                                 goto done;
 393                         }
 394                         if (device->state == STATE_PLAYING) device->state = STATE_STARTING;
 395                         else if (device->state == STATE_STOPPING) device->state = STATE_STOPPED;
 396                 } else {
 397                         WARN("IDsDriverBuffer_SetFormat failed\n");
 398                         goto done;
 399                 }
 400                 /* FIXME: should we set err back to DS_OK in all cases ? */
 401         }
 402         DSOUND_RecalcPrimary(device);
 403
 404         if (nSamplesPerSec != device->pwfx->nSamplesPerSec) {
 405                 IDirectSoundBufferImpl** dsb = device->buffers;
 406                 for (i = 0; i < device->nrofbuffers; i++, dsb++) {
 407                         /* **** */
 408                         EnterCriticalSection(&((*dsb)->lock));
 409
 410                         (*dsb)->freqAdjust = ((*dsb)->freq << DSOUND_FREQSHIFT) /
 411                                 wfex->nSamplesPerSec;
 412
 413                         LeaveCriticalSection(&((*dsb)->lock));
 414                         /* **** */
 415                 }
 416         }
 417
 418 done:
 419         LeaveCriticalSection(&(device->mixlock));
 420         RtlReleaseResource(&(device->buffer_list_lock));
 421         /* **** */
 422
 423         return err;
 424 }
 425
 426 /*******************************************************************************
 427  *              PrimaryBuffer
 428  */
 429 /* This sets this format for the <em>Primary Buffer Only</em> */
 430 /* See file:///cdrom/sdk52/docs/worddoc/dsound.doc page 120 */
 431 static HRESULT WINAPI PrimaryBufferImpl_SetFormat(
 432     LPDIRECTSOUNDBUFFER8 iface,
 433     LPCWAVEFORMATEX wfex)
 434 {
 435     TRACE("(%p,%p)\n", iface, wfex);
 436     return DSOUND_PrimarySetFormat(((PrimaryBufferImpl *)iface)->device, wfex);
 437 }
 438
 439 static HRESULT WINAPI PrimaryBufferImpl_SetVolume(
 440         LPDIRECTSOUNDBUFFER8 iface,LONG vol
 441 ) {
 442         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 443         DWORD ampfactors;
 444         DSVOLUMEPAN volpan;
 445         HRESULT hres = DS_OK;
 446         TRACE("(%p,%ld)\n", iface, vol);
 447
 448         if (!(device->dsbd.dwFlags & DSBCAPS_CTRLVOLUME)) {
 449                 WARN("control unavailable\n");
 450                 return DSERR_CONTROLUNAVAIL;
 451         }
 452
 453         if ((vol > DSBVOLUME_MAX) || (vol < DSBVOLUME_MIN)) {
 454                 WARN("invalid parameter: vol = %ld\n", vol);
 455                 return DSERR_INVALIDPARAM;
 456         }
 457
 458         /* **** */
 459         EnterCriticalSection(&(device->mixlock));
 460
 461         waveOutGetVolume(device->hwo, &ampfactors);
 462         volpan.dwTotalLeftAmpFactor=ampfactors & 0xffff;
 463         volpan.dwTotalRightAmpFactor=ampfactors >> 16;
 464         DSOUND_AmpFactorToVolPan(&volpan);
 465         if (vol != volpan.lVolume) {
 466             volpan.lVolume=vol;
 467             DSOUND_RecalcVolPan(&volpan);
 468             if (device->hwbuf) {
 469                 hres = IDsDriverBuffer_SetVolumePan(device->hwbuf, &volpan);
 470                 if (hres != DS_OK)
 471                     WARN("IDsDriverBuffer_SetVolumePan failed\n");
 472             } else {
 473                 ampfactors = (volpan.dwTotalLeftAmpFactor & 0xffff) | (volpan.dwTotalRightAmpFactor << 16);
 474                 waveOutSetVolume(device->hwo, ampfactors);
 475             }
 476         }
 477
 478         LeaveCriticalSection(&(device->mixlock));
 479         /* **** */
 480
 481         return hres;
 482 }
 483
 484 static HRESULT WINAPI PrimaryBufferImpl_GetVolume(
 485         LPDIRECTSOUNDBUFFER8 iface,LPLONG vol
 486 ) {
 487         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 488         DWORD ampfactors;
 489         DSVOLUMEPAN volpan;
 490         TRACE("(%p,%p)\n", iface, vol);
 491
 492         if (!(device->dsbd.dwFlags & DSBCAPS_CTRLVOLUME)) {
 493                 WARN("control unavailable\n");
 494                 return DSERR_CONTROLUNAVAIL;
 495         }
 496
 497         if (vol == NULL) {
 498                 WARN("invalid parameter: vol = NULL\n");
 499                 return DSERR_INVALIDPARAM;
 500         }
 501
 502         waveOutGetVolume(device->hwo, &ampfactors);
 503         volpan.dwTotalLeftAmpFactor=ampfactors & 0xffff;
 504         volpan.dwTotalRightAmpFactor=ampfactors >> 16;
 505         DSOUND_AmpFactorToVolPan(&volpan);
 506         *vol = volpan.lVolume;
 507         return DS_OK;
 508 }
 509
 510 static HRESULT WINAPI PrimaryBufferImpl_SetFrequency(
 511         LPDIRECTSOUNDBUFFER8 iface,DWORD freq
 512 ) {
 513         PrimaryBufferImpl *This = (PrimaryBufferImpl *)iface;
 514         TRACE("(%p,%ld)\n",This,freq);
 515
 516         /* You cannot set the frequency of the primary buffer */
 517         WARN("control unavailable\n");
 518         return DSERR_CONTROLUNAVAIL;
 519 }
 520
 521 static HRESULT WINAPI PrimaryBufferImpl_Play(
 522         LPDIRECTSOUNDBUFFER8 iface,DWORD reserved1,DWORD reserved2,DWORD flags
 523 ) {
 524         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 525         TRACE("(%p,%08lx,%08lx,%08lx)\n", iface, reserved1, reserved2, flags);
 526
 527         if (!(flags & DSBPLAY_LOOPING)) {
 528                 WARN("invalid parameter: flags = %08lx\n", flags);
 529                 return DSERR_INVALIDPARAM;
 530         }
 531
 532         /* **** */
 533         EnterCriticalSection(&(device->mixlock));
 534
 535         if (device->state == STATE_STOPPED)
 536                 device->state = STATE_STARTING;
 537         else if (device->state == STATE_STOPPING)
 538                 device->state = STATE_PLAYING;
 539
 540         LeaveCriticalSection(&(device->mixlock));
 541         /* **** */
 542
 543         return DS_OK;
 544 }
 545
 546 static HRESULT WINAPI PrimaryBufferImpl_Stop(LPDIRECTSOUNDBUFFER8 iface)
 547 {
 548         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 549         TRACE("(%p)\n", iface);
 550
 551         /* **** */
 552         EnterCriticalSection(&(device->mixlock));
 553
 554         if (device->state == STATE_PLAYING)
 555                 device->state = STATE_STOPPING;
 556         else if (device->state == STATE_STARTING)
 557                 device->state = STATE_STOPPED;
 558
 559         LeaveCriticalSection(&(device->mixlock));
 560         /* **** */
 561
 562         return DS_OK;
 563 }
 564
 565 static ULONG WINAPI PrimaryBufferImpl_AddRef(LPDIRECTSOUNDBUFFER8 iface)
 566 {
 567     PrimaryBufferImpl *This = (PrimaryBufferImpl *)iface;
 568     ULONG ref = InterlockedIncrement(&(This->ref));
 569     TRACE("(%p) ref was %ld\n", This, ref - 1);
 570     return ref;
 571 }
 572
 573 static ULONG WINAPI PrimaryBufferImpl_Release(LPDIRECTSOUNDBUFFER8 iface)
 574 {
 575     PrimaryBufferImpl *This = (PrimaryBufferImpl *)iface;
 576     DWORD ref = InterlockedDecrement(&(This->ref));
 577     TRACE("(%p) ref was %ld\n", This, ref + 1);
 578
 579     if (!ref) {
 580         This->device->primary = NULL;
 581         HeapFree(GetProcessHeap(), 0, This);
 582         TRACE("(%p) released\n", This);
 583     }
 584     return ref;
 585 }
 586
 587 static HRESULT WINAPI PrimaryBufferImpl_GetCurrentPosition(
 588         LPDIRECTSOUNDBUFFER8 iface,LPDWORD playpos,LPDWORD writepos
 589 ) {
 590         HRESULT hres;
 591         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 592         TRACE("(%p,%p,%p)\n", iface, playpos, writepos);
 593
 594         hres = DSOUND_PrimaryGetPosition(device, playpos, writepos);
 595         if (hres != DS_OK) {
 596                 WARN("DSOUND_PrimaryGetPosition failed\n");
 597                 return hres;
 598         }
 599         if (writepos) {
 600                 if (device->state != STATE_STOPPED)
 601                         /* apply the documented 10ms lead to writepos */
 602                         *writepos += device->writelead;
 603                 while (*writepos >= device->buflen) *writepos -= device->buflen;
 604         }
 605         TRACE("playpos = %ld, writepos = %ld (%p, time=%ld)\n", playpos?*playpos:0, writepos?*writepos:0, device, GetTickCount());
 606         return DS_OK;
 607 }
 608
 609 static HRESULT WINAPI PrimaryBufferImpl_GetStatus(
 610         LPDIRECTSOUNDBUFFER8 iface,LPDWORD status
 611 ) {
 612         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 613         TRACE("(%p,%p)\n", iface, status);
 614
 615         if (status == NULL) {
 616                 WARN("invalid parameter: status == NULL\n");
 617                 return DSERR_INVALIDPARAM;
 618         }
 619
 620         *status = 0;
 621         if ((device->state == STATE_STARTING) ||
 622             (device->state == STATE_PLAYING))
 623                 *status |= DSBSTATUS_PLAYING | DSBSTATUS_LOOPING;
 624
 625         TRACE("status=%lx\n", *status);
 626         return DS_OK;
 627 }
 628
 629
 630 static HRESULT WINAPI PrimaryBufferImpl_GetFormat(
 631     LPDIRECTSOUNDBUFFER8 iface,
 632     LPWAVEFORMATEX lpwf,
 633     DWORD wfsize,
 634     LPDWORD wfwritten)
 635 {
 636     DWORD size;
 637     DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 638     TRACE("(%p,%p,%ld,%p)\n", iface, lpwf, wfsize, wfwritten);
 639
 640     size = sizeof(WAVEFORMATEX) + device->pwfx->cbSize;
 641
 642     if (lpwf) { /* NULL is valid */
 643         if (wfsize >= size) {
 644             CopyMemory(lpwf,device->pwfx,size);
 645             if (wfwritten)
 646                 *wfwritten = size;
 647         } else {
 648             WARN("invalid parameter: wfsize too small\n");
 649             if (wfwritten)
 650                 *wfwritten = 0;
 651             return DSERR_INVALIDPARAM;
 652         }
 653     } else {
 654         if (wfwritten)
 655             *wfwritten = sizeof(WAVEFORMATEX) + device->pwfx->cbSize;
 656         else {
 657             WARN("invalid parameter: wfwritten == NULL\n");
 658             return DSERR_INVALIDPARAM;
 659         }
 660     }
 661
 662     return DS_OK;
 663 }
 664
 665 static HRESULT WINAPI PrimaryBufferImpl_Lock(
 666         LPDIRECTSOUNDBUFFER8 iface,DWORD writecursor,DWORD writebytes,LPVOID lplpaudioptr1,LPDWORD audiobytes1,LPVOID lplpaudioptr2,LPDWORD audiobytes2,DWORD flags
 667 ) {
 668         HRESULT hres;
 669         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 670         TRACE("(%p,%ld,%ld,%p,%p,%p,%p,0x%08lx) at %ld\n",
 671                 iface,
 672                 writecursor,
 673                 writebytes,
 674                 lplpaudioptr1,
 675                 audiobytes1,
 676                 lplpaudioptr2,
 677                 audiobytes2,
 678                 flags,
 679                 GetTickCount()
 680         );
 681
 682         if (device->priolevel != DSSCL_WRITEPRIMARY) {
 683                 WARN("failed priority check!\n");
 684                 return DSERR_PRIOLEVELNEEDED;
 685         }
 686
 687         /* when this flag is set, writecursor is meaningless and must be calculated */
 688         if (flags & DSBLOCK_FROMWRITECURSOR) {
 689                 /* GetCurrentPosition does too much magic to duplicate here */
 690                 hres = IDirectSoundBuffer_GetCurrentPosition(iface, NULL, &writecursor);
 691                 if (hres != DS_OK) {
 692                         WARN("IDirectSoundBuffer_GetCurrentPosition failed\n");
 693                         return hres;
 694                 }
 695         }
 696
 697         /* when this flag is set, writebytes is meaningless and must be set */
 698         if (flags & DSBLOCK_ENTIREBUFFER)
 699                 writebytes = device->buflen;
 700
 701         if (writecursor >= device->buflen) {
 702                 WARN("Invalid parameter, writecursor: %lu >= buflen: %lu\n",
 703                      writecursor, device->buflen);
 704                 return DSERR_INVALIDPARAM;
 705         }
 706
 707         if (writebytes > device->buflen) {
 708                 WARN("Invalid parameter, writebytes: %lu > buflen: %lu\n",
 709                      writebytes, device->buflen);
 710                 return DSERR_INVALIDPARAM;
 711         }
 712
 713         if (!(device->drvdesc.dwFlags & DSDDESC_DONTNEEDPRIMARYLOCK) && device->hwbuf) {
 714                 hres = IDsDriverBuffer_Lock(device->hwbuf,
 715                                             lplpaudioptr1, audiobytes1,
 716                                             lplpaudioptr2, audiobytes2,
 717                                             writecursor, writebytes,
 718                                             0);
 719                 if (hres != DS_OK) {
 720                         WARN("IDsDriverBuffer_Lock failed\n");
 721                         return hres;
 722                 }
 723         } else {
 724                 if (writecursor+writebytes <= device->buflen) {
 725                         *(LPBYTE*)lplpaudioptr1 = device->buffer+writecursor;
 726                         *audiobytes1 = writebytes;
 727                         if (lplpaudioptr2)
 728                                 *(LPBYTE*)lplpaudioptr2 = NULL;
 729                         if (audiobytes2)
 730                                 *audiobytes2 = 0;
 731                         TRACE("->%ld.0\n",writebytes);
 732                 } else {
 733                         *(LPBYTE*)lplpaudioptr1 = device->buffer+writecursor;
 734                         *audiobytes1 = device->buflen-writecursor;
 735                         if (lplpaudioptr2)
 736                                 *(LPBYTE*)lplpaudioptr2 = device->buffer;
 737                         if (audiobytes2)
 738                                 *audiobytes2 = writebytes-(device->buflen-writecursor);
 739                         TRACE("->%ld.%ld\n",*audiobytes1,audiobytes2?*audiobytes2:0);
 740                 }
 741         }
 742         return DS_OK;
 743 }
 744
 745 static HRESULT WINAPI PrimaryBufferImpl_SetCurrentPosition(
 746         LPDIRECTSOUNDBUFFER8 iface,DWORD newpos
 747 ) {
 748         PrimaryBufferImpl *This = (PrimaryBufferImpl *)iface;
 749         TRACE("(%p,%ld)\n",This,newpos);
 750
 751         /* You cannot set the position of the primary buffer */
 752         WARN("invalid call\n");
 753         return DSERR_INVALIDCALL;
 754 }
 755
 756 static HRESULT WINAPI PrimaryBufferImpl_SetPan(
 757         LPDIRECTSOUNDBUFFER8 iface,LONG pan
 758 ) {
 759         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 760         DWORD ampfactors;
 761         DSVOLUMEPAN volpan;
 762         HRESULT hres = DS_OK;
 763         TRACE("(%p,%ld)\n", iface, pan);
 764
 765         if (!(device->dsbd.dwFlags & DSBCAPS_CTRLPAN)) {
 766                 WARN("control unavailable\n");
 767                 return DSERR_CONTROLUNAVAIL;
 768         }
 769
 770         if ((pan > DSBPAN_RIGHT) || (pan < DSBPAN_LEFT)) {
 771                 WARN("invalid parameter: pan = %ld\n", pan);
 772                 return DSERR_INVALIDPARAM;
 773         }
 774
 775         /* **** */
 776         EnterCriticalSection(&(device->mixlock));
 777
 778         waveOutGetVolume(device->hwo, &ampfactors);
 779         volpan.dwTotalLeftAmpFactor=ampfactors & 0xffff;
 780         volpan.dwTotalRightAmpFactor=ampfactors >> 16;
 781         DSOUND_AmpFactorToVolPan(&volpan);
 782         if (pan != volpan.lPan) {
 783             volpan.lPan=pan;
 784             DSOUND_RecalcVolPan(&volpan);
 785             if (device->hwbuf) {
 786                 hres = IDsDriverBuffer_SetVolumePan(device->hwbuf, &volpan);
 787                 if (hres != DS_OK)
 788                     WARN("IDsDriverBuffer_SetVolumePan failed\n");
 789             } else {
 790                 ampfactors = (volpan.dwTotalLeftAmpFactor & 0xffff) | (volpan.dwTotalRightAmpFactor << 16);
 791                 waveOutSetVolume(device->hwo, ampfactors);
 792             }
 793         }
 794
 795         LeaveCriticalSection(&(device->mixlock));
 796         /* **** */
 797
 798         return hres;
 799 }
 800
 801 static HRESULT WINAPI PrimaryBufferImpl_GetPan(
 802         LPDIRECTSOUNDBUFFER8 iface,LPLONG pan
 803 ) {
 804         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 805         DWORD ampfactors;
 806         DSVOLUMEPAN volpan;
 807         TRACE("(%p,%p)\n", iface, pan);
 808
 809         if (!(device->dsbd.dwFlags & DSBCAPS_CTRLPAN)) {
 810                 WARN("control unavailable\n");
 811                 return DSERR_CONTROLUNAVAIL;
 812         }
 813
 814         if (pan == NULL) {
 815                 WARN("invalid parameter: pan == NULL\n");
 816                 return DSERR_INVALIDPARAM;
 817         }
 818
 819         waveOutGetVolume(device->hwo, &ampfactors);
 820         volpan.dwTotalLeftAmpFactor=ampfactors & 0xffff;
 821         volpan.dwTotalRightAmpFactor=ampfactors >> 16;
 822         DSOUND_AmpFactorToVolPan(&volpan);
 823         *pan = volpan.lPan;
 824         return DS_OK;
 825 }
 826
 827 static HRESULT WINAPI PrimaryBufferImpl_Unlock(
 828         LPDIRECTSOUNDBUFFER8 iface,LPVOID p1,DWORD x1,LPVOID p2,DWORD x2
 829 ) {
 830         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 831         TRACE("(%p,%p,%ld,%p,%ld)\n", iface, p1, x1, p2, x2);
 832
 833         if (device->priolevel != DSSCL_WRITEPRIMARY) {
 834                 WARN("failed priority check!\n");
 835                 return DSERR_PRIOLEVELNEEDED;
 836         }
 837
 838         if (!(device->drvdesc.dwFlags & DSDDESC_DONTNEEDPRIMARYLOCK) && device->hwbuf) {
 839                 HRESULT hres;
 840
 841                 hres = IDsDriverBuffer_Unlock(device->hwbuf, p1, x1, p2, x2);
 842                 if (hres != DS_OK) {
 843                         WARN("IDsDriverBuffer_Unlock failed\n");
 844                         return hres;
 845                 }
 846         }
 847
 848         return DS_OK;
 849 }
 850
 851 static HRESULT WINAPI PrimaryBufferImpl_Restore(
 852         LPDIRECTSOUNDBUFFER8 iface
 853 ) {
 854         PrimaryBufferImpl *This = (PrimaryBufferImpl *)iface;
 855         FIXME("(%p):stub\n",This);
 856         return DS_OK;
 857 }
 858
 859 static HRESULT WINAPI PrimaryBufferImpl_GetFrequency(
 860         LPDIRECTSOUNDBUFFER8 iface,LPDWORD freq
 861 ) {
 862         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 863         TRACE("(%p,%p)\n", iface, freq);
 864
 865         if (freq == NULL) {
 866                 WARN("invalid parameter: freq == NULL\n");
 867                 return DSERR_INVALIDPARAM;
 868         }
 869
 870         if (!(device->dsbd.dwFlags & DSBCAPS_CTRLFREQUENCY)) {
 871                 WARN("control unavailable\n");
 872                 return DSERR_CONTROLUNAVAIL;
 873         }
 874
 875         *freq = device->pwfx->nSamplesPerSec;
 876         TRACE("-> %ld\n", *freq);
 877
 878         return DS_OK;
 879 }
 880
 881 static HRESULT WINAPI PrimaryBufferImpl_SetFX(
 882         LPDIRECTSOUNDBUFFER8 iface,DWORD dwEffectsCount,LPDSEFFECTDESC pDSFXDesc,LPDWORD pdwResultCodes
 883 ) {
 884         PrimaryBufferImpl *This = (PrimaryBufferImpl *)iface;
 885         DWORD u;
 886         FIXME("(%p,%lu,%p,%p): stub\n",This,dwEffectsCount,pDSFXDesc,pdwResultCodes);
 887
 888         if (pdwResultCodes)
 889                 for (u=0; u<dwEffectsCount; u++) pdwResultCodes[u] = DSFXR_UNKNOWN;
 890
 891         WARN("control unavailable\n");
 892         return DSERR_CONTROLUNAVAIL;
 893 }
 894
 895 static HRESULT WINAPI PrimaryBufferImpl_AcquireResources(
 896         LPDIRECTSOUNDBUFFER8 iface,DWORD dwFlags,DWORD dwEffectsCount,LPDWORD pdwResultCodes
 897 ) {
 898         PrimaryBufferImpl *This = (PrimaryBufferImpl *)iface;
 899         DWORD u;
 900         FIXME("(%p,%08lu,%lu,%p): stub\n",This,dwFlags,dwEffectsCount,pdwResultCodes);
 901
 902         if (pdwResultCodes)
 903                 for (u=0; u<dwEffectsCount; u++) pdwResultCodes[u] = DSFXR_UNKNOWN;
 904
 905         WARN("control unavailable\n");
 906         return DSERR_CONTROLUNAVAIL;
 907 }
 908
 909 static HRESULT WINAPI PrimaryBufferImpl_GetObjectInPath(
 910         LPDIRECTSOUNDBUFFER8 iface,REFGUID rguidObject,DWORD dwIndex,REFGUID rguidInterface,LPVOID* ppObject
 911 ) {
 912         PrimaryBufferImpl *This = (PrimaryBufferImpl *)iface;
 913         FIXME("(%p,%s,%lu,%s,%p): stub\n",This,debugstr_guid(rguidObject),dwIndex,debugstr_guid(rguidInterface),ppObject);
 914
 915         WARN("control unavailable\n");
 916         return DSERR_CONTROLUNAVAIL;
 917 }
 918
 919 static HRESULT WINAPI PrimaryBufferImpl_Initialize(
 920         LPDIRECTSOUNDBUFFER8 iface,LPDIRECTSOUND dsound,LPCDSBUFFERDESC dbsd
 921 ) {
 922         PrimaryBufferImpl *This = (PrimaryBufferImpl *)iface;
 923         FIXME("(%p,%p,%p):stub\n",This,dsound,dbsd);
 924         DPRINTF("Re-Init!!!\n");
 925         WARN("already initialized\n");
 926         return DSERR_ALREADYINITIALIZED;
 927 }
 928
 929 static HRESULT WINAPI PrimaryBufferImpl_GetCaps(
 930         LPDIRECTSOUNDBUFFER8 iface,LPDSBCAPS caps
 931 ) {
 932         DirectSoundDevice *device = ((PrimaryBufferImpl *)iface)->device;
 933         TRACE("(%p,%p)\n", iface, caps);
 934
 935         if (caps == NULL) {
 936                 WARN("invalid parameter: caps == NULL\n");
 937                 return DSERR_INVALIDPARAM;
 938         }
 939
 940         if (caps->dwSize < sizeof(*caps)) {
 941                 WARN("invalid parameter: caps->dwSize = %ld: < %d\n", caps->dwSize, sizeof(*caps));
 942                 return DSERR_INVALIDPARAM;
 943         }
 944
 945         caps->dwFlags = device->dsbd.dwFlags;
 946         if (device->hwbuf) caps->dwFlags |= DSBCAPS_LOCHARDWARE;
 947         else caps->dwFlags |= DSBCAPS_LOCSOFTWARE;
 948
 949         caps->dwBufferBytes = device->buflen;
 950
 951         /* This value represents the speed of the "unlock" command.
 952            As unlock is quite fast (it does not do anything), I put
 953            4096 ko/s = 4 Mo / s */
 954         /* FIXME: hwbuf speed */
 955         caps->dwUnlockTransferRate = 4096;
 956         caps->dwPlayCpuOverhead = 0;
 957
 958         return DS_OK;
 959 }
 960
 961 static HRESULT WINAPI PrimaryBufferImpl_QueryInterface(
 962         LPDIRECTSOUNDBUFFER8 iface,REFIID riid,LPVOID *ppobj
 963 ) {
 964         PrimaryBufferImpl *This = (PrimaryBufferImpl *)iface;
 965         DirectSoundDevice *device = This->device;
 966         TRACE("(%p,%s,%p)\n", iface, debugstr_guid(riid), ppobj);
 967
 968         if (ppobj == NULL) {
 969                 WARN("invalid parameter\n");
 970                 return E_INVALIDARG;
 971         }
 972
 973         *ppobj = NULL;  /* assume failure */
 974
 975         if ( IsEqualGUID(riid, &IID_IUnknown) ||
 976              IsEqualGUID(riid, &IID_IDirectSoundBuffer) ) {
 977                 IDirectSoundBuffer_AddRef((LPDIRECTSOUNDBUFFER)This);
 978                 *ppobj = This;
 979                 return S_OK;
 980         }
 981
 982         /* DirectSoundBuffer and DirectSoundBuffer8 are different and */
 983         /* a primary buffer can't have a DirectSoundBuffer8 interface */
 984         if ( IsEqualGUID( &IID_IDirectSoundBuffer8, riid ) ) {
 985                 WARN("app requested DirectSoundBuffer8 on primary buffer\n");
 986                 return E_NOINTERFACE;
 987         }
 988
 989         if ( IsEqualGUID( &IID_IDirectSoundNotify, riid ) ) {
 990                 ERR("app requested IDirectSoundNotify on primary buffer\n");
 991                 /* FIXME: should we support this? */
 992                 return E_NOINTERFACE;
 993         }
 994
 995         if ( IsEqualGUID( &IID_IDirectSound3DBuffer, riid ) ) {
 996                 ERR("app requested IDirectSound3DBuffer on primary buffer\n");
 997                 return E_NOINTERFACE;
 998         }
 999
1000         if ( IsEqualGUID( &IID_IDirectSound3DListener, riid ) ) {
1001                 if (!device->listener)
1002                         IDirectSound3DListenerImpl_Create(device, &device->listener);
1003                 if (device->listener) {
1004                         *ppobj = device->listener;
1005                         IDirectSound3DListener_AddRef((LPDIRECTSOUND3DLISTENER)*ppobj);
1006                         return S_OK;
1007                 }
1008
1009                 WARN("IID_IDirectSound3DListener failed\n");
1010                 return E_NOINTERFACE;
1011         }
1012
1013         if ( IsEqualGUID( &IID_IKsPropertySet, riid ) ) {
1014                 FIXME("app requested IKsPropertySet on primary buffer\n");
1015                 return E_NOINTERFACE;
1016         }
1017
1018         FIXME( "Unknown IID %s\n", debugstr_guid( riid ) );
1019         return E_NOINTERFACE;
1020 }
1021
1022 static const IDirectSoundBuffer8Vtbl dspbvt =
1023 {
1024         PrimaryBufferImpl_QueryInterface,
1025         PrimaryBufferImpl_AddRef,
1026         PrimaryBufferImpl_Release,
1027         PrimaryBufferImpl_GetCaps,
1028         PrimaryBufferImpl_GetCurrentPosition,
1029         PrimaryBufferImpl_GetFormat,
1030         PrimaryBufferImpl_GetVolume,
1031         PrimaryBufferImpl_GetPan,
1032         PrimaryBufferImpl_GetFrequency,
1033         PrimaryBufferImpl_GetStatus,
1034         PrimaryBufferImpl_Initialize,
1035         PrimaryBufferImpl_Lock,
1036         PrimaryBufferImpl_Play,
1037         PrimaryBufferImpl_SetCurrentPosition,
1038         PrimaryBufferImpl_SetFormat,
1039         PrimaryBufferImpl_SetVolume,
1040         PrimaryBufferImpl_SetPan,
1041         PrimaryBufferImpl_SetFrequency,
1042         PrimaryBufferImpl_Stop,
1043         PrimaryBufferImpl_Unlock,
1044         PrimaryBufferImpl_Restore,
1045         PrimaryBufferImpl_SetFX,
1046         PrimaryBufferImpl_AcquireResources,
1047         PrimaryBufferImpl_GetObjectInPath
1048 };
1049
1050 HRESULT PrimaryBufferImpl_Create(
1051         DirectSoundDevice * device,
1052         PrimaryBufferImpl ** ppdsb,
1053         LPCDSBUFFERDESC dsbd)
1054 {
1055         PrimaryBufferImpl *dsb;
1056         TRACE("%p,%p,%p)\n",device,ppdsb,dsbd);
1057
1058         if (dsbd->lpwfxFormat) {
1059                 WARN("invalid parameter: dsbd->lpwfxFormat != NULL\n");
1060                 *ppdsb = NULL;
1061                 return DSERR_INVALIDPARAM;
1062         }
1063
1064         dsb = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(*dsb));
1065
1066         if (dsb == NULL) {
1067                 WARN("out of memory\n");
1068                 *ppdsb = NULL;
1069                 return DSERR_OUTOFMEMORY;
1070         }
1071
1072         dsb->ref = 0;
1073         dsb->device = device;
1074         dsb->lpVtbl = &dspbvt;
1075
1076         CopyMemory(&device->dsbd, dsbd, sizeof(*dsbd));
1077
1078         TRACE("Created primary buffer at %p\n", dsb);
1079         TRACE("(formattag=0x%04x,chans=%d,samplerate=%ld,"
1080                 "bytespersec=%ld,blockalign=%d,bitspersamp=%d,cbSize=%d)\n",
1081                 device->pwfx->wFormatTag, device->pwfx->nChannels,
1082                 device->pwfx->nSamplesPerSec, device->pwfx->nAvgBytesPerSec,
1083                 device->pwfx->nBlockAlign, device->pwfx->wBitsPerSample,
1084                 device->pwfx->cbSize);
1085
1086         *ppdsb = dsb;
1087         return S_OK;
1088 }