snd_win.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 #include "quakedef.h"
  21 #include "winquake.h"
  22
  23 #define iDirectSoundCreate(a,b,c)       pDirectSoundCreate(a,b,c)
  24
  25 HRESULT (WINAPI *pDirectSoundCreate)(GUID FAR *lpGUID, LPDIRECTSOUND FAR *lplpDS, IUnknown FAR *pUnkOuter);
  26
  27 // 64K is > 1 second at 16-bit, 22050 Hz
  28 #define WAV_BUFFERS                             64
  29 #define WAV_MASK                                0x3F
  30 #define WAV_BUFFER_SIZE                 0x0400
  31 #define SECONDARY_BUFFER_SIZE   0x10000
  32
  33 typedef enum {SIS_SUCCESS, SIS_FAILURE, SIS_NOTAVAIL} sndinitstat;
  34
  35 static qboolean wavonly;
  36 static qboolean dsound_init;
  37 static qboolean wav_init;
  38 static qboolean snd_firsttime = true, snd_isdirect, snd_iswave;
  39 static qboolean primary_format_set;
  40
  41 static int      sample16;
  42 static int      snd_sent, snd_completed;
  43
  44
  45 /*
  46  * Global variables. Must be visible to window-procedure function
  47  *  so it can unlock and free the data block after it has been played.
  48  */
  49
  50 HANDLE          hData;
  51 HPSTR           lpData, lpData2;
  52
  53 HGLOBAL         hWaveHdr;
  54 LPWAVEHDR       lpWaveHdr;
  55
  56 HWAVEOUT    hWaveOut;
  57
  58 WAVEOUTCAPS     wavecaps;
  59
  60 DWORD   gSndBufSize;
  61
  62 MMTIME          mmstarttime;
  63
  64 LPDIRECTSOUND pDS;
  65 LPDIRECTSOUNDBUFFER pDSBuf, pDSPBuf;
  66
  67 HINSTANCE hInstDS;
  68
  69 qboolean SNDDMA_InitWav (void);
  70 sndinitstat SNDDMA_InitDirect (void);
  71
  72 /*
  73 ==================
  74 S_BlockSound
  75 ==================
  76 */
  77 void S_BlockSound (void)
  78 {
  79
  80 // DirectSound takes care of blocking itself
  81         if (snd_iswave)
  82         {
  83                 snd_blocked++;
  84
  85                 if (snd_blocked == 1)
  86                 {
  87                         waveOutReset (hWaveOut);
  88                 }
  89         }
  90 }
  91
  92
  93 /*
  94 ==================
  95 S_UnblockSound
  96 ==================
  97 */
  98 void S_UnblockSound (void)
  99 {
 100
 101 // DirectSound takes care of blocking itself
 102         if (snd_iswave)
 103         {
 104                 snd_blocked--;
 105         }
 106 }
 107
 108
 109 /*
 110 ==================
 111 FreeSound
 112 ==================
 113 */
 114 void FreeSound (void)
 115 {
 116         int             i;
 117
 118         if (pDSBuf)
 119         {
 120                 pDSBuf->lpVtbl->Stop(pDSBuf);
 121                 pDSBuf->lpVtbl->Release(pDSBuf);
 122         }
 123
 124 // only release primary buffer if it's not also the mixing buffer we just released
 125         if (pDSPBuf && (pDSBuf != pDSPBuf))
 126         {
 127                 pDSPBuf->lpVtbl->Release(pDSPBuf);
 128         }
 129
 130         if (pDS)
 131         {
 132                 pDS->lpVtbl->SetCooperativeLevel (pDS, mainwindow, DSSCL_NORMAL);
 133                 pDS->lpVtbl->Release(pDS);
 134         }
 135
 136         if (hWaveOut)
 137         {
 138                 waveOutReset (hWaveOut);
 139
 140                 if (lpWaveHdr)
 141                 {
 142                         for (i=0 ; i< WAV_BUFFERS ; i++)
 143                                 waveOutUnprepareHeader (hWaveOut, lpWaveHdr+i, sizeof(WAVEHDR));
 144                 }
 145
 146                 waveOutClose (hWaveOut);
 147
 148                 if (hWaveHdr)
 149                 {
 150                         GlobalUnlock(hWaveHdr);
 151                         GlobalFree(hWaveHdr);
 152                 }
 153
 154                 if (hData)
 155                 {
 156                         GlobalUnlock(hData);
 157                         GlobalFree(hData);
 158                 }
 159
 160         }
 161
 162         pDS = NULL;
 163         pDSBuf = NULL;
 164         pDSPBuf = NULL;
 165         hWaveOut = 0;
 166         hData = 0;
 167         hWaveHdr = 0;
 168         lpData = NULL;
 169         lpWaveHdr = NULL;
 170         dsound_init = false;
 171         wav_init = false;
 172 }
 173
 174
 175 /*
 176 ==================
 177 SNDDMA_InitDirect
 178
 179 Direct-Sound support
 180 ==================
 181 */
 182 sndinitstat SNDDMA_InitDirect (void)
 183 {
 184         DSBUFFERDESC    dsbuf;
 185         DSBCAPS                 dsbcaps;
 186         DWORD                   dwSize, dwWrite;
 187         DSCAPS                  dscaps;
 188         WAVEFORMATEX    format, pformat;
 189         HRESULT                 hresult;
 190         int                             reps;
 191         int i;
 192
 193         memset((void *)shm, 0, sizeof(*shm));
 194         shm->channels = 2;
 195         shm->samplebits = 16;
 196         i = COM_CheckParm ("-sndspeed"); // LordHavoc: -sndspeed option
 197         if (i && i != (com_argc - 1))
 198                 shm->speed = atoi(com_argv[i+1]);
 199         else
 200                 shm->speed = 44100;
 201
 202         memset (&format, 0, sizeof(format));
 203         format.wFormatTag = WAVE_FORMAT_PCM;
 204     format.nChannels = shm->channels;
 205     format.wBitsPerSample = shm->samplebits;
 206     format.nSamplesPerSec = shm->speed;
 207     format.nBlockAlign = format.nChannels * format.wBitsPerSample / 8;
 208     format.cbSize = 0;
 209     format.nAvgBytesPerSec = format.nSamplesPerSec * format.nBlockAlign;
 210
 211         if (!hInstDS)
 212         {
 213                 hInstDS = LoadLibrary("dsound.dll");
 214
 215                 if (hInstDS == NULL)
 216                 {
 217                         Con_SafePrintf ("Couldn't load dsound.dll\n");
 218                         return SIS_FAILURE;
 219                 }
 220
 221                 pDirectSoundCreate = (void *)GetProcAddress(hInstDS,"DirectSoundCreate");
 222
 223                 if (!pDirectSoundCreate)
 224                 {
 225                         Con_SafePrintf ("Couldn't get DS proc addr\n");
 226                         return SIS_FAILURE;
 227                 }
 228         }
 229
 230         while ((hresult = iDirectSoundCreate(NULL, &pDS, NULL)) != DS_OK)
 231         {
 232                 if (hresult != DSERR_ALLOCATED)
 233                 {
 234                         Con_SafePrintf ("DirectSound create failed\n");
 235                         return SIS_FAILURE;
 236                 }
 237
 238                 if (MessageBox (NULL,
 239                                                 "The sound hardware is in use by another app.\n\n"
 240                                             "Select Retry to try to start sound again or Cancel to run Quake with no sound.",
 241                                                 "Sound not available",
 242                                                 MB_RETRYCANCEL | MB_SETFOREGROUND | MB_ICONEXCLAMATION) != IDRETRY)
 243                 {
 244                         Con_SafePrintf ("DirectSoundCreate failure\n"
 245                                                         "  hardware already in use\n");
 246                         return SIS_NOTAVAIL;
 247                 }
 248         }
 249
 250         dscaps.dwSize = sizeof(dscaps);
 251
 252         if (DS_OK != pDS->lpVtbl->GetCaps (pDS, &dscaps))
 253         {
 254                 Con_SafePrintf ("Couldn't get DS caps\n");
 255         }
 256
 257         if (dscaps.dwFlags & DSCAPS_EMULDRIVER)
 258         {
 259                 Con_SafePrintf ("No DirectSound driver installed\n");
 260                 FreeSound ();
 261                 return SIS_FAILURE;
 262         }
 263
 264         if (DS_OK != pDS->lpVtbl->SetCooperativeLevel (pDS, mainwindow, DSSCL_EXCLUSIVE))
 265         {
 266                 Con_SafePrintf ("Set coop level failed\n");
 267                 FreeSound ();
 268                 return SIS_FAILURE;
 269         }
 270
 271 // get access to the primary buffer, if possible, so we can set the
 272 // sound hardware format
 273         memset (&dsbuf, 0, sizeof(dsbuf));
 274         dsbuf.dwSize = sizeof(DSBUFFERDESC);
 275         dsbuf.dwFlags = DSBCAPS_PRIMARYBUFFER;
 276         dsbuf.dwBufferBytes = 0;
 277         dsbuf.lpwfxFormat = NULL;
 278
 279         memset(&dsbcaps, 0, sizeof(dsbcaps));
 280         dsbcaps.dwSize = sizeof(dsbcaps);
 281         primary_format_set = false;
 282
 283         if (!COM_CheckParm ("-snoforceformat"))
 284         {
 285                 if (DS_OK == pDS->lpVtbl->CreateSoundBuffer(pDS, &dsbuf, &pDSPBuf, NULL))
 286                 {
 287                         pformat = format;
 288
 289                         if (DS_OK != pDSPBuf->lpVtbl->SetFormat (pDSPBuf, &pformat))
 290                         {
 291                                 if (snd_firsttime)
 292                                         Con_SafePrintf ("Set primary sound buffer format: no\n");
 293                         }
 294                         else
 295                         {
 296                                 if (snd_firsttime)
 297                                         Con_SafePrintf ("Set primary sound buffer format: yes\n");
 298
 299                                 primary_format_set = true;
 300                         }
 301                 }
 302         }
 303
 304         if (!primary_format_set || !COM_CheckParm ("-primarysound"))
 305         {
 306         // create the secondary buffer we'll actually work with
 307                 memset (&dsbuf, 0, sizeof(dsbuf));
 308                 dsbuf.dwSize = sizeof(DSBUFFERDESC);
 309                 dsbuf.dwFlags = DSBCAPS_CTRLFREQUENCY | DSBCAPS_LOCSOFTWARE;
 310                 dsbuf.dwBufferBytes = SECONDARY_BUFFER_SIZE;
 311                 dsbuf.lpwfxFormat = &format;
 312
 313                 memset(&dsbcaps, 0, sizeof(dsbcaps));
 314                 dsbcaps.dwSize = sizeof(dsbcaps);
 315
 316                 if (DS_OK != pDS->lpVtbl->CreateSoundBuffer(pDS, &dsbuf, &pDSBuf, NULL))
 317                 {
 318                         Con_SafePrintf ("DS:CreateSoundBuffer Failed");
 319                         FreeSound ();
 320                         return SIS_FAILURE;
 321                 }
 322
 323                 shm->channels = format.nChannels;
 324                 shm->samplebits = format.wBitsPerSample;
 325                 shm->speed = format.nSamplesPerSec;
 326
 327                 if (DS_OK != pDSBuf->lpVtbl->GetCaps (pDSBuf, &dsbcaps))
 328                 {
 329                         Con_SafePrintf ("DS:GetCaps failed\n");
 330                         FreeSound ();
 331                         return SIS_FAILURE;
 332                 }
 333
 334                 if (snd_firsttime)
 335                         Con_SafePrintf ("Using secondary sound buffer\n");
 336         }
 337         else
 338         {
 339                 if (DS_OK != pDS->lpVtbl->SetCooperativeLevel (pDS, mainwindow, DSSCL_WRITEPRIMARY))
 340                 {
 341                         Con_SafePrintf ("Set coop level failed\n");
 342                         FreeSound ();
 343                         return SIS_FAILURE;
 344                 }
 345
 346                 if (DS_OK != pDSPBuf->lpVtbl->GetCaps (pDSPBuf, &dsbcaps))
 347                 {
 348                         Con_Printf ("DS:GetCaps failed\n");
 349                         return SIS_FAILURE;
 350                 }
 351
 352                 pDSBuf = pDSPBuf;
 353                 Con_SafePrintf ("Using primary sound buffer\n");
 354         }
 355
 356         // Make sure mixer is active
 357         pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 358
 359         if (snd_firsttime)
 360                 Con_SafePrintf("   %d channel(s)\n"
 361                                "   %d bits/sample\n"
 362                                            "   %d samples/sec\n",
 363                                            shm->channels, shm->samplebits, shm->speed);
 364
 365         gSndBufSize = dsbcaps.dwBufferBytes;
 366
 367 // initialize the buffer
 368         reps = 0;
 369
 370         while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &lpData, &dwSize, NULL, NULL, 0)) != DS_OK)
 371         {
 372                 if (hresult != DSERR_BUFFERLOST)
 373                 {
 374                         Con_SafePrintf ("SNDDMA_InitDirect: DS::Lock Sound Buffer Failed\n");
 375                         FreeSound ();
 376                         return SIS_FAILURE;
 377                 }
 378
 379                 if (++reps > 10000)
 380                 {
 381                         Con_SafePrintf ("SNDDMA_InitDirect: DS: couldn't restore buffer\n");
 382                         FreeSound ();
 383                         return SIS_FAILURE;
 384                 }
 385
 386         }
 387
 388         memset(lpData, 0, dwSize);
 389
 390         pDSBuf->lpVtbl->Unlock(pDSBuf, lpData, dwSize, NULL, 0);
 391
 392         /* we don't want anyone to access the buffer directly w/o locking it first. */
 393         lpData = NULL;
 394
 395         pDSBuf->lpVtbl->Stop(pDSBuf);
 396         pDSBuf->lpVtbl->GetCurrentPosition(pDSBuf, &mmstarttime.u.sample, &dwWrite);
 397         pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 398
 399         shm->samples = gSndBufSize/(shm->samplebits/8);
 400         shm->samplepos = 0;
 401         shm->buffer = (unsigned char *) lpData;
 402         sample16 = (shm->samplebits/8) - 1;
 403
 404         dsound_init = true;
 405
 406         return SIS_SUCCESS;
 407 }
 408
 409
 410 /*
 411 ==================
 412 SNDDM_InitWav
 413
 414 Crappy windows multimedia base
 415 ==================
 416 */
 417 qboolean SNDDMA_InitWav (void)
 418 {
 419         WAVEFORMATEX  format;
 420         int                             i;
 421         HRESULT                 hr;
 422
 423         snd_sent = 0;
 424         snd_completed = 0;
 425
 426         memset((void *)shm, 0, sizeof(*shm));
 427         shm->channels = 2;
 428         shm->samplebits = 16;
 429         i = COM_CheckParm ("-sndspeed"); // LordHavoc: -sndspeed option
 430         if (i && i != (com_argc - 1))
 431                 shm->speed = atoi(com_argv[i+1]);
 432         else
 433                 shm->speed = 44100;
 434
 435         memset (&format, 0, sizeof(format));
 436         format.wFormatTag = WAVE_FORMAT_PCM;
 437         format.nChannels = shm->channels;
 438         format.wBitsPerSample = shm->samplebits;
 439         format.nSamplesPerSec = shm->speed;
 440         format.nBlockAlign = format.nChannels
 441                 *format.wBitsPerSample / 8;
 442         format.cbSize = 0;
 443         format.nAvgBytesPerSec = format.nSamplesPerSec
 444                 *format.nBlockAlign;
 445
 446         /* Open a waveform device for output using window callback. */
 447         while ((hr = waveOutOpen((LPHWAVEOUT)&hWaveOut, WAVE_MAPPER,
 448                                         &format,
 449                                         0, 0L, CALLBACK_NULL)) != MMSYSERR_NOERROR)
 450         {
 451                 if (hr != MMSYSERR_ALLOCATED)
 452                 {
 453                         Con_SafePrintf ("waveOutOpen failed\n");
 454                         return false;
 455                 }
 456
 457                 if (MessageBox (NULL,
 458                                                 "The sound hardware is in use by another app.\n\n"
 459                                             "Select Retry to try to start sound again or Cancel to run Quake with no sound.",
 460                                                 "Sound not available",
 461                                                 MB_RETRYCANCEL | MB_SETFOREGROUND | MB_ICONEXCLAMATION) != IDRETRY)
 462                 {
 463                         Con_SafePrintf ("waveOutOpen failure;\n"
 464                                                         "  hardware already in use\n");
 465                         return false;
 466                 }
 467         }
 468
 469         /*
 470          * Allocate and lock memory for the waveform data. The memory
 471          * for waveform data must be globally allocated with
 472          * GMEM_MOVEABLE and GMEM_SHARE flags.
 473
 474         */
 475         gSndBufSize = WAV_BUFFERS*WAV_BUFFER_SIZE;
 476         hData = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE, gSndBufSize);
 477         if (!hData)
 478         {
 479                 Con_SafePrintf ("Sound: Out of memory.\n");
 480                 FreeSound ();
 481                 return false;
 482         }
 483         lpData = GlobalLock(hData);
 484         if (!lpData)
 485         {
 486                 Con_SafePrintf ("Sound: Failed to lock.\n");
 487                 FreeSound ();
 488                 return false;
 489         }
 490         memset (lpData, 0, gSndBufSize);
 491
 492         /*
 493          * Allocate and lock memory for the header. This memory must
 494          * also be globally allocated with GMEM_MOVEABLE and
 495          * GMEM_SHARE flags.
 496          */
 497         hWaveHdr = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE,
 498                 (DWORD) sizeof(WAVEHDR) * WAV_BUFFERS);
 499
 500         if (hWaveHdr == NULL)
 501         {
 502                 Con_SafePrintf ("Sound: Failed to Alloc header.\n");
 503                 FreeSound ();
 504                 return false;
 505         }
 506
 507         lpWaveHdr = (LPWAVEHDR) GlobalLock(hWaveHdr);
 508
 509         if (lpWaveHdr == NULL)
 510         {
 511                 Con_SafePrintf ("Sound: Failed to lock header.\n");
 512                 FreeSound ();
 513                 return false;
 514         }
 515
 516         memset (lpWaveHdr, 0, sizeof(WAVEHDR) * WAV_BUFFERS);
 517
 518         /* After allocation, set up and prepare headers. */
 519         for (i=0 ; i<WAV_BUFFERS ; i++)
 520         {
 521                 lpWaveHdr[i].dwBufferLength = WAV_BUFFER_SIZE;
 522                 lpWaveHdr[i].lpData = lpData + i*WAV_BUFFER_SIZE;
 523
 524                 if (waveOutPrepareHeader(hWaveOut, lpWaveHdr+i, sizeof(WAVEHDR)) !=
 525                                 MMSYSERR_NOERROR)
 526                 {
 527                         Con_SafePrintf ("Sound: failed to prepare wave headers\n");
 528                         FreeSound ();
 529                         return false;
 530                 }
 531         }
 532
 533         shm->samples = gSndBufSize/(shm->samplebits/8);
 534         shm->samplepos = 0;
 535         shm->buffer = (unsigned char *) lpData;
 536         sample16 = (shm->samplebits/8) - 1;
 537
 538         wav_init = true;
 539
 540         return true;
 541 }
 542
 543 /*
 544 ==================
 545 SNDDMA_Init
 546
 547 Try to find a sound device to mix for.
 548 Returns false if nothing is found.
 549 ==================
 550 */
 551
 552 qboolean SNDDMA_Init(void)
 553 {
 554         sndinitstat     stat;
 555
 556         if (COM_CheckParm ("-wavonly"))
 557                 wavonly = true;
 558
 559         dsound_init = wav_init = 0;
 560
 561         stat = SIS_FAILURE;     // assume DirectSound won't initialize
 562
 563         /* Init DirectSound */
 564         if (!wavonly)
 565         {
 566                 if (snd_firsttime || snd_isdirect)
 567                 {
 568                         stat = SNDDMA_InitDirect ();;
 569
 570                         if (stat == SIS_SUCCESS)
 571                         {
 572                                 snd_isdirect = true;
 573
 574                                 if (snd_firsttime)
 575                                         Con_SafePrintf ("DirectSound initialized\n");
 576                         }
 577                         else
 578                         {
 579                                 snd_isdirect = false;
 580                                 Con_SafePrintf ("DirectSound failed to init\n");
 581                         }
 582                 }
 583         }
 584
 585 // if DirectSound didn't succeed in initializing, try to initialize
 586 // waveOut sound, unless DirectSound failed because the hardware is
 587 // already allocated (in which case the user has already chosen not
 588 // to have sound)
 589         if (!dsound_init && (stat != SIS_NOTAVAIL))
 590         {
 591                 if (snd_firsttime || snd_iswave)
 592                 {
 593
 594                         snd_iswave = SNDDMA_InitWav ();
 595
 596                         if (snd_iswave)
 597                         {
 598                                 if (snd_firsttime)
 599                                         Con_SafePrintf ("Wave sound initialized\n");
 600                         }
 601                         else
 602                         {
 603                                 Con_SafePrintf ("Wave sound failed to init\n");
 604                         }
 605                 }
 606         }
 607
 608         snd_firsttime = false;
 609
 610         if (!dsound_init && !wav_init)
 611                 return 0;
 612
 613         return 1;
 614 }
 615
 616 /*
 617 ==============
 618 SNDDMA_GetDMAPos
 619
 620 return the current sample position (in mono samples read)
 621 inside the recirculating dma buffer, so the mixing code will know
 622 how many sample are required to fill it up.
 623 ===============
 624 */
 625 int SNDDMA_GetDMAPos(void)
 626 {
 627         MMTIME  mmtime;
 628         int             s;
 629         DWORD   dwWrite;
 630
 631         if (dsound_init)
 632         {
 633                 mmtime.wType = TIME_SAMPLES;
 634                 pDSBuf->lpVtbl->GetCurrentPosition(pDSBuf, &mmtime.u.sample, &dwWrite);
 635                 s = mmtime.u.sample - mmstarttime.u.sample;
 636         }
 637         else if (wav_init)
 638         {
 639                 s = snd_sent * WAV_BUFFER_SIZE;
 640         }
 641         else
 642                 s = 0;
 643
 644
 645         s >>= sample16;
 646
 647         s &= (shm->samples-1);
 648
 649         return s;
 650 }
 651
 652 /*
 653 ==============
 654 SNDDMA_Submit
 655
 656 Send sound to device if buffer isn't really the dma buffer
 657 ===============
 658 */
 659 void SNDDMA_Submit(void)
 660 {
 661         LPWAVEHDR       h;
 662         int                     wResult;
 663
 664         if (!wav_init)
 665                 return;
 666
 667         //
 668         // find which sound blocks have completed
 669         //
 670         while (1)
 671         {
 672                 if ( snd_completed == snd_sent )
 673                 {
 674 #ifndef AKVERSION
 675                         Con_DPrintf ("Sound overrun\n");
 676 #endif
 677                         break;
 678                 }
 679
 680                 if ( ! (lpWaveHdr[ snd_completed & WAV_MASK].dwFlags & WHDR_DONE) )
 681                 {
 682                         break;
 683                 }
 684
 685                 snd_completed++;        // this buffer has been played
 686         }
 687
 688         //
 689         // submit two new sound blocks
 690         //
 691         while (((snd_sent - snd_completed) >> sample16) < 4)
 692         {
 693                 h = lpWaveHdr + ( snd_sent&WAV_MASK );
 694
 695                 snd_sent++;
 696                 /*
 697                  * Now the data block can be sent to the output device. The
 698                  * waveOutWrite function returns immediately and waveform
 699                  * data is sent to the output device in the background.
 700                  */
 701                 wResult = waveOutWrite(hWaveOut, h, sizeof(WAVEHDR));
 702
 703                 if (wResult != MMSYSERR_NOERROR)
 704                 {
 705                         Con_SafePrintf ("Failed to write block to device\n");
 706                         FreeSound ();
 707                         return;
 708                 }
 709         }
 710 }
 711
 712 /*
 713 ==============
 714 SNDDMA_Shutdown
 715
 716 Reset the sound device for exiting
 717 ===============
 718 */
 719 void SNDDMA_Shutdown(void)
 720 {
 721         FreeSound ();
 722 }
 723
 724 DWORD dsound_dwSize;
 725 DWORD dsound_dwSize2;
 726 DWORD *dsound_pbuf;
 727 DWORD *dsound_pbuf2;
 728 void *S_LockBuffer(void)
 729 {
 730         int reps;
 731         HRESULT hresult;
 732
 733         if (pDSBuf)
 734         {
 735                 reps = 0;
 736
 737                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &dsound_pbuf, &dsound_dwSize, &dsound_pbuf2, &dsound_dwSize2, 0)) != DS_OK)
 738                 {
 739                         if (hresult != DSERR_BUFFERLOST)
 740                         {
 741                                 Con_Printf ("S_LockBuffer: DS::Lock Sound Buffer Failed\n");
 742                                 S_Shutdown ();
 743                                 S_Startup ();
 744                                 return NULL;
 745                         }
 746
 747                         if (++reps > 10000)
 748                         {
 749                                 Con_Printf ("S_LockBuffer: DS: couldn't restore buffer\n");
 750                                 S_Shutdown ();
 751                                 S_Startup ();
 752                                 return NULL;
 753                         }
 754                 }
 755                 return dsound_pbuf;
 756         }
 757         else
 758                 return shm->buffer;
 759 }
 760
 761 void S_UnlockBuffer(void)
 762 {
 763         if (pDSBuf)
 764                 pDSBuf->lpVtbl->Unlock(pDSBuf, dsound_pbuf, dsound_dwSize, dsound_pbuf2, dsound_dwSize2);
 765 }
 766