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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21 /*
  22  * Most thread locking is complete. There may be a few race
  23  * conditions still lurking.
  24  *
  25  * Tested with a Soundblaster clone, a Gravis UltraSound Classic,
  26  * and a Turtle Beach Tropez+.
  27  *
  28  * TODO:
  29  *      Implement SetCooperativeLevel properly (need to address focus issues)
  30  *      Implement DirectSound3DBuffers (stubs in place)
  31  *      Use hardware 3D support if available
  32  *      Add critical section locking inside Release and AddRef methods
  33  *      Handle static buffers - put those in hardware, non-static not in hardware
  34  *      Hardware DuplicateSoundBuffer
  35  *      Proper volume calculation, and setting volume in HEL primary buffer
  36  *      Optimize WINMM and negotiate fragment size, decrease DS_HEL_MARGIN
  37  */
  38
  39 #include <stdarg.h>
  40
  41 #define COBJMACROS
  42 #define NONAMELESSSTRUCT
  43 #define NONAMELESSUNION
  44 #include "windef.h"
  45 #include "winbase.h"
  46 #include "winuser.h"
  47 #include "winnls.h"
  48 #include "winreg.h"
  49 #include "mmsystem.h"
  50 #include "winternl.h"
  51 #include "mmddk.h"
  52 #include "wine/debug.h"
  53 #include "dsound.h"
  54 #include "dsdriver.h"
  55 #include "dsound_private.h"
  56 #include "dsconf.h"
  57
  58 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
  59
  60 /* these are eligible for tuning... they must be high on slow machines... */
  61 /* some stuff may get more responsive with lower values though... */
  62 #define DS_EMULDRIVER 0 /* some games (Quake 2, UT) refuse to accept
  63                                 emulated dsound devices. set to 0 ! */
  64 #define DS_HEL_MARGIN 5 /* HEL only: number of waveOut fragments ahead to mix in new buffers
  65                          * (keep this close or equal to DS_HEL_QUEUE for best results) */
  66 #define DS_HEL_QUEUE  5 /* HEL only: number of waveOut fragments ahead to queue to driver
  67                          * (this will affect HEL sound reliability and latency) */
  68
  69 #define DS_SND_QUEUE_MAX 28 /* max number of fragments to prebuffer */
  70 #define DS_SND_QUEUE_MIN 12 /* min number of fragments to prebuffer */
  71
  72 DirectSoundDevice*      DSOUND_renderer[MAXWAVEDRIVERS];
  73 GUID                    DSOUND_renderer_guids[MAXWAVEDRIVERS];
  74 GUID                    DSOUND_capture_guids[MAXWAVEDRIVERS];
  75
  76 HRESULT mmErr(UINT err)
  77 {
  78         switch(err) {
  79         case MMSYSERR_NOERROR:
  80                 return DS_OK;
  81         case MMSYSERR_ALLOCATED:
  82                 return DSERR_ALLOCATED;
  83         case MMSYSERR_ERROR:
  84         case MMSYSERR_INVALHANDLE:
  85         case WAVERR_STILLPLAYING:
  86                 return DSERR_GENERIC; /* FIXME */
  87         case MMSYSERR_NODRIVER:
  88                 return DSERR_NODRIVER;
  89         case MMSYSERR_NOMEM:
  90                 return DSERR_OUTOFMEMORY;
  91         case MMSYSERR_INVALPARAM:
  92         case WAVERR_BADFORMAT:
  93         case WAVERR_UNPREPARED:
  94                 return DSERR_INVALIDPARAM;
  95         case MMSYSERR_NOTSUPPORTED:
  96                 return DSERR_UNSUPPORTED;
  97         default:
  98                 FIXME("Unknown MMSYS error %d\n",err);
  99                 return DSERR_GENERIC;
 100         }
 101 }
 102
 103 int ds_emuldriver = DS_EMULDRIVER;
 104 int ds_hel_margin = DS_HEL_MARGIN;
 105 int ds_hel_queue = DS_HEL_QUEUE;
 106 int ds_snd_queue_max = DS_SND_QUEUE_MAX;
 107 int ds_snd_queue_min = DS_SND_QUEUE_MIN;
 108 int ds_hw_accel = DS_HW_ACCEL_FULL;
 109 int ds_default_playback = 0;
 110 int ds_default_capture = 0;
 111 int ds_default_sample_rate = 22050;
 112 int ds_default_bits_per_sample = 8;
 113
 114 /*
 115  * Get a config key from either the app-specific or the default config
 116  */
 117
 118 inline static DWORD get_config_key( HKEY defkey, HKEY appkey, const char *name,
 119                                     char *buffer, DWORD size )
 120 {
 121     if (appkey && !RegQueryValueExA( appkey, name, 0, NULL, (LPBYTE)buffer, &size )) return 0;
 122     if (defkey && !RegQueryValueExA( defkey, name, 0, NULL, (LPBYTE)buffer, &size )) return 0;
 123     return ERROR_FILE_NOT_FOUND;
 124 }
 125
 126
 127 /*
 128  * Setup the dsound options.
 129  */
 130
 131 void setup_dsound_options(void)
 132 {
 133     char buffer[MAX_PATH+16];
 134     HKEY hkey, appkey = 0;
 135     DWORD len;
 136
 137     buffer[MAX_PATH]='\0';
 138
 139     /* @@ Wine registry key: HKCU\Software\Wine\DirectSound */
 140     if (RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\DirectSound", &hkey )) hkey = 0;
 141
 142     len = GetModuleFileNameA( 0, buffer, MAX_PATH );
 143     if (len && len < MAX_PATH)
 144     {
 145         HKEY tmpkey;
 146         /* @@ Wine registry key: HKCU\Software\Wine\AppDefaults\app.exe\DirectSound */
 147         if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\AppDefaults", &tmpkey ))
 148         {
 149             char *p, *appname = buffer;
 150             if ((p = strrchr( appname, '/' ))) appname = p + 1;
 151             if ((p = strrchr( appname, '\\' ))) appname = p + 1;
 152             strcat( appname, "\\DirectSound" );
 153             TRACE("appname = [%s]\n", appname);
 154             if (RegOpenKeyA( tmpkey, appname, &appkey )) appkey = 0;
 155             RegCloseKey( tmpkey );
 156         }
 157     }
 158
 159     /* get options */
 160
 161     if (!get_config_key( hkey, appkey, "EmulDriver", buffer, MAX_PATH ))
 162         ds_emuldriver = strcmp(buffer, "N");
 163
 164     if (!get_config_key( hkey, appkey, "HELmargin", buffer, MAX_PATH ))
 165         ds_hel_margin = atoi(buffer);
 166
 167     if (!get_config_key( hkey, appkey, "HELqueue", buffer, MAX_PATH ))
 168         ds_hel_queue = atoi(buffer);
 169
 170     if (!get_config_key( hkey, appkey, "SndQueueMax", buffer, MAX_PATH ))
 171         ds_snd_queue_max = atoi(buffer);
 172
 173     if (!get_config_key( hkey, appkey, "SndQueueMin", buffer, MAX_PATH ))
 174         ds_snd_queue_min = atoi(buffer);
 175
 176     if (!get_config_key( hkey, appkey, "HardwareAcceleration", buffer, MAX_PATH )) {
 177         if (strcmp(buffer, "Full") == 0)
 178             ds_hw_accel = DS_HW_ACCEL_FULL;
 179         else if (strcmp(buffer, "Standard") == 0)
 180             ds_hw_accel = DS_HW_ACCEL_STANDARD;
 181         else if (strcmp(buffer, "Basic") == 0)
 182             ds_hw_accel = DS_HW_ACCEL_BASIC;
 183         else if (strcmp(buffer, "Emulation") == 0)
 184             ds_hw_accel = DS_HW_ACCEL_EMULATION;
 185     }
 186
 187     if (!get_config_key( hkey, appkey, "DefaultPlayback", buffer, MAX_PATH ))
 188             ds_default_playback = atoi(buffer);
 189
 190     if (!get_config_key( hkey, appkey, "DefaultCapture", buffer, MAX_PATH ))
 191             ds_default_capture = atoi(buffer);
 192
 193     if (!get_config_key( hkey, appkey, "DefaultSampleRate", buffer, MAX_PATH ))
 194             ds_default_sample_rate = atoi(buffer);
 195
 196     if (!get_config_key( hkey, appkey, "DefaultBitsPerSample", buffer, MAX_PATH ))
 197             ds_default_bits_per_sample = atoi(buffer);
 198
 199     if (appkey) RegCloseKey( appkey );
 200     if (hkey) RegCloseKey( hkey );
 201
 202     if (ds_emuldriver != DS_EMULDRIVER )
 203        WARN("ds_emuldriver = %d (default=%d)\n",ds_emuldriver, DS_EMULDRIVER);
 204     if (ds_hel_margin != DS_HEL_MARGIN )
 205        WARN("ds_hel_margin = %d (default=%d)\n",ds_hel_margin, DS_HEL_MARGIN );
 206     if (ds_hel_queue != DS_HEL_QUEUE )
 207        WARN("ds_hel_queue = %d (default=%d)\n",ds_hel_queue, DS_HEL_QUEUE );
 208     if (ds_snd_queue_max != DS_SND_QUEUE_MAX)
 209        WARN("ds_snd_queue_max = %d (default=%d)\n",ds_snd_queue_max ,DS_SND_QUEUE_MAX);
 210     if (ds_snd_queue_min != DS_SND_QUEUE_MIN)
 211        WARN("ds_snd_queue_min = %d (default=%d)\n",ds_snd_queue_min ,DS_SND_QUEUE_MIN);
 212     if (ds_hw_accel != DS_HW_ACCEL_FULL)
 213         WARN("ds_hw_accel = %s (default=Full)\n",
 214             ds_hw_accel==DS_HW_ACCEL_FULL ? "Full" :
 215             ds_hw_accel==DS_HW_ACCEL_STANDARD ? "Standard" :
 216             ds_hw_accel==DS_HW_ACCEL_BASIC ? "Basic" :
 217             ds_hw_accel==DS_HW_ACCEL_EMULATION ? "Emulation" :
 218             "Unknown");
 219     if (ds_default_playback != 0)
 220         WARN("ds_default_playback = %d (default=0)\n",ds_default_playback);
 221     if (ds_default_capture != 0)
 222         WARN("ds_default_capture = %d (default=0)\n",ds_default_playback);
 223     if (ds_default_sample_rate != 22050)
 224         WARN("ds_default_sample_rate = %d (default=22050)\n",ds_default_sample_rate);
 225     if (ds_default_bits_per_sample != 8)
 226         WARN("ds_default_bits_per_sample = %d (default=8)\n",ds_default_bits_per_sample);
 227 }
 228
 229 static const char * get_device_id(LPCGUID pGuid)
 230 {
 231     if (IsEqualGUID(&DSDEVID_DefaultPlayback, pGuid))
 232         return "DSDEVID_DefaultPlayback";
 233     else if (IsEqualGUID(&DSDEVID_DefaultVoicePlayback, pGuid))
 234         return "DSDEVID_DefaultVoicePlayback";
 235     else if (IsEqualGUID(&DSDEVID_DefaultCapture, pGuid))
 236         return "DSDEVID_DefaultCapture";
 237     else if (IsEqualGUID(&DSDEVID_DefaultVoiceCapture, pGuid))
 238         return "DSDEVID_DefaultVoiceCapture";
 239     return debugstr_guid(pGuid);
 240 }
 241
 242 /***************************************************************************
 243  * GetDeviceID  [DSOUND.9]
 244  *
 245  * Retrieves unique identifier of default device specified
 246  *
 247  * PARAMS
 248  *    pGuidSrc  [I] Address of device GUID.
 249  *    pGuidDest [O] Address to receive unique device GUID.
 250  *
 251  * RETURNS
 252  *    Success: DS_OK
 253  *    Failure: DSERR_INVALIDPARAM
 254  *
 255  * NOTES
 256  *    pGuidSrc is a valid device GUID or DSDEVID_DefaultPlayback,
 257  *    DSDEVID_DefaultCapture, DSDEVID_DefaultVoicePlayback, or
 258  *    DSDEVID_DefaultVoiceCapture.
 259  *    Returns pGuidSrc if pGuidSrc is a valid device or the device
 260  *    GUID for the specified constants.
 261  */
 262 HRESULT WINAPI GetDeviceID(LPCGUID pGuidSrc, LPGUID pGuidDest)
 263 {
 264     TRACE("(%s,%p)\n", get_device_id(pGuidSrc),pGuidDest);
 265
 266     if ( pGuidSrc == NULL) {
 267         WARN("invalid parameter: pGuidSrc == NULL\n");
 268         return DSERR_INVALIDPARAM;
 269     }
 270
 271     if ( pGuidDest == NULL ) {
 272         WARN("invalid parameter: pGuidDest == NULL\n");
 273         return DSERR_INVALIDPARAM;
 274     }
 275
 276     if ( IsEqualGUID( &DSDEVID_DefaultPlayback, pGuidSrc ) ||
 277          IsEqualGUID( &DSDEVID_DefaultVoicePlayback, pGuidSrc ) ) {
 278         CopyMemory(pGuidDest, &DSOUND_renderer_guids[ds_default_playback], sizeof(GUID));
 279         TRACE("returns %s\n", get_device_id(pGuidDest));
 280         return DS_OK;
 281     }
 282
 283     if ( IsEqualGUID( &DSDEVID_DefaultCapture, pGuidSrc ) ||
 284          IsEqualGUID( &DSDEVID_DefaultVoiceCapture, pGuidSrc ) ) {
 285         CopyMemory(pGuidDest, &DSOUND_capture_guids[ds_default_capture], sizeof(GUID));
 286         TRACE("returns %s\n", get_device_id(pGuidDest));
 287         return DS_OK;
 288     }
 289
 290     CopyMemory(pGuidDest, pGuidSrc, sizeof(GUID));
 291     TRACE("returns %s\n", get_device_id(pGuidDest));
 292
 293     return DS_OK;
 294 }
 295
 296
 297 /***************************************************************************
 298  * DirectSoundEnumerateA [DSOUND.2]
 299  *
 300  * Enumerate all DirectSound drivers installed in the system
 301  *
 302  * PARAMS
 303  *    lpDSEnumCallback  [I] Address of callback function.
 304  *    lpContext         [I] Address of user defined context passed to callback function.
 305  *
 306  * RETURNS
 307  *    Success: DS_OK
 308  *    Failure: DSERR_INVALIDPARAM
 309  */
 310 HRESULT WINAPI DirectSoundEnumerateA(
 311     LPDSENUMCALLBACKA lpDSEnumCallback,
 312     LPVOID lpContext)
 313 {
 314     unsigned devs, wod;
 315     DSDRIVERDESC desc;
 316     GUID guid;
 317     int err;
 318
 319     TRACE("lpDSEnumCallback = %p, lpContext = %p\n",
 320         lpDSEnumCallback, lpContext);
 321
 322     if (lpDSEnumCallback == NULL) {
 323         WARN("invalid parameter: lpDSEnumCallback == NULL\n");
 324         return DSERR_INVALIDPARAM;
 325     }
 326
 327     devs = waveOutGetNumDevs();
 328     if (devs > 0) {
 329         if (GetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) {
 330             for (wod = 0; wod < devs; ++wod) {
 331                 if (IsEqualGUID( &guid, &DSOUND_renderer_guids[wod]) ) {
 332                     err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 333                     if (err == DS_OK) {
 334                         TRACE("calling lpDSEnumCallback(NULL,\"%s\",\"%s\",%p)\n",
 335                               "Primary Sound Driver",desc.szDrvname,lpContext);
 336                         if (lpDSEnumCallback(NULL, "Primary Sound Driver", desc.szDrvname, lpContext) == FALSE)
 337                             return DS_OK;
 338                     }
 339                 }
 340             }
 341         }
 342     }
 343
 344     for (wod = 0; wod < devs; ++wod) {
 345         err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 346         if (err == DS_OK) {
 347             TRACE("calling lpDSEnumCallback(%s,\"%s\",\"%s\",%p)\n",
 348                   debugstr_guid(&DSOUND_renderer_guids[wod]),desc.szDesc,desc.szDrvname,lpContext);
 349             if (lpDSEnumCallback(&DSOUND_renderer_guids[wod], desc.szDesc, desc.szDrvname, lpContext) == FALSE)
 350                 return DS_OK;
 351         }
 352     }
 353     return DS_OK;
 354 }
 355
 356 /***************************************************************************
 357  * DirectSoundEnumerateW [DSOUND.3]
 358  *
 359  * Enumerate all DirectSound drivers installed in the system
 360  *
 361  * PARAMS
 362  *    lpDSEnumCallback  [I] Address of callback function.
 363  *    lpContext         [I] Address of user defined context passed to callback function.
 364  *
 365  * RETURNS
 366  *    Success: DS_OK
 367  *    Failure: DSERR_INVALIDPARAM
 368  */
 369 HRESULT WINAPI DirectSoundEnumerateW(
 370         LPDSENUMCALLBACKW lpDSEnumCallback,
 371         LPVOID lpContext )
 372 {
 373     unsigned devs, wod;
 374     DSDRIVERDESC desc;
 375     GUID guid;
 376     int err;
 377     WCHAR wDesc[MAXPNAMELEN];
 378     WCHAR wName[MAXPNAMELEN];
 379
 380     TRACE("lpDSEnumCallback = %p, lpContext = %p\n",
 381         lpDSEnumCallback, lpContext);
 382
 383     if (lpDSEnumCallback == NULL) {
 384         WARN("invalid parameter: lpDSEnumCallback == NULL\n");
 385         return DSERR_INVALIDPARAM;
 386     }
 387
 388     devs = waveOutGetNumDevs();
 389     if (devs > 0) {
 390         if (GetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) {
 391             for (wod = 0; wod < devs; ++wod) {
 392                 if (IsEqualGUID( &guid, &DSOUND_renderer_guids[wod] ) ) {
 393                     err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 394                     if (err == DS_OK) {
 395                         TRACE("calling lpDSEnumCallback(NULL,\"%s\",\"%s\",%p)\n",
 396                               "Primary Sound Driver",desc.szDrvname,lpContext);
 397                         MultiByteToWideChar( CP_ACP, 0, "Primary Sound Driver", -1,
 398                                              wDesc, sizeof(wDesc)/sizeof(WCHAR) );
 399                         MultiByteToWideChar( CP_ACP, 0, desc.szDrvname, -1,
 400                                              wName, sizeof(wName)/sizeof(WCHAR) );
 401                         if (lpDSEnumCallback(NULL, wDesc, wName, lpContext) == FALSE)
 402                             return DS_OK;
 403                     }
 404                 }
 405             }
 406         }
 407     }
 408
 409     for (wod = 0; wod < devs; ++wod) {
 410         err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 411         if (err == DS_OK) {
 412             TRACE("calling lpDSEnumCallback(%s,\"%s\",\"%s\",%p)\n",
 413                   debugstr_guid(&DSOUND_renderer_guids[wod]),desc.szDesc,desc.szDrvname,lpContext);
 414             MultiByteToWideChar( CP_ACP, 0, desc.szDesc, -1,
 415                                  wDesc, sizeof(wDesc)/sizeof(WCHAR) );
 416             MultiByteToWideChar( CP_ACP, 0, desc.szDrvname, -1,
 417                                  wName, sizeof(wName)/sizeof(WCHAR) );
 418             if (lpDSEnumCallback(&DSOUND_renderer_guids[wod], wDesc, wName, lpContext) == FALSE)
 419                 return DS_OK;
 420         }
 421     }
 422     return DS_OK;
 423 }
 424
 425 /*******************************************************************************
 426  * DirectSound ClassFactory
 427  */
 428
 429 typedef  HRESULT (*FnCreateInstance)(REFIID riid, LPVOID *ppobj);
 430
 431 typedef struct {
 432     const IClassFactoryVtbl *lpVtbl;
 433     LONG ref;
 434     REFCLSID rclsid;
 435     FnCreateInstance pfnCreateInstance;
 436 } IClassFactoryImpl;
 437
 438 static HRESULT WINAPI
 439 DSCF_QueryInterface(LPCLASSFACTORY iface, REFIID riid, LPVOID *ppobj)
 440 {
 441     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 442     FIXME("(%p, %s, %p) stub!\n", This, debugstr_guid(riid), ppobj);
 443     if (ppobj == NULL)
 444         return E_POINTER;
 445     return E_NOINTERFACE;
 446 }
 447
 448 static ULONG WINAPI DSCF_AddRef(LPCLASSFACTORY iface)
 449 {
 450     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 451     ULONG ref = InterlockedIncrement(&(This->ref));
 452     TRACE("(%p) ref was %d\n", This, ref - 1);
 453     return ref;
 454 }
 455
 456 static ULONG WINAPI DSCF_Release(LPCLASSFACTORY iface)
 457 {
 458     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 459     ULONG ref = InterlockedDecrement(&(This->ref));
 460     TRACE("(%p) ref was %d\n", This, ref + 1);
 461     /* static class, won't be freed */
 462     return ref;
 463 }
 464
 465 static HRESULT WINAPI DSCF_CreateInstance(
 466     LPCLASSFACTORY iface,
 467     LPUNKNOWN pOuter,
 468     REFIID riid,
 469     LPVOID *ppobj)
 470 {
 471     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 472     TRACE("(%p, %p, %s, %p)\n", This, pOuter, debugstr_guid(riid), ppobj);
 473
 474     if (pOuter)
 475         return CLASS_E_NOAGGREGATION;
 476
 477     if (ppobj == NULL) {
 478         WARN("invalid parameter\n");
 479         return DSERR_INVALIDPARAM;
 480     }
 481     *ppobj = NULL;
 482     return This->pfnCreateInstance(riid, ppobj);
 483 }
 484
 485 static HRESULT WINAPI DSCF_LockServer(LPCLASSFACTORY iface, BOOL dolock)
 486 {
 487     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 488     FIXME("(%p, %d) stub!\n", This, dolock);
 489     return S_OK;
 490 }
 491
 492 static const IClassFactoryVtbl DSCF_Vtbl = {
 493     DSCF_QueryInterface,
 494     DSCF_AddRef,
 495     DSCF_Release,
 496     DSCF_CreateInstance,
 497     DSCF_LockServer
 498 };
 499
 500 static IClassFactoryImpl DSOUND_CF[] = {
 501     { &DSCF_Vtbl, 1, &CLSID_DirectSound, (FnCreateInstance)DSOUND_Create },
 502     { &DSCF_Vtbl, 1, &CLSID_DirectSound8, (FnCreateInstance)DSOUND_Create8 },
 503     { &DSCF_Vtbl, 1, &CLSID_DirectSoundCapture, (FnCreateInstance)DSOUND_CaptureCreate },
 504     { &DSCF_Vtbl, 1, &CLSID_DirectSoundCapture8, (FnCreateInstance)DSOUND_CaptureCreate8 },
 505     { &DSCF_Vtbl, 1, &CLSID_DirectSoundFullDuplex, (FnCreateInstance)DSOUND_FullDuplexCreate },
 506     { &DSCF_Vtbl, 1, &CLSID_DirectSoundPrivate, (FnCreateInstance)IKsPrivatePropertySetImpl_Create },
 507     { NULL, 0, NULL, NULL }
 508 };
 509
 510 /*******************************************************************************
 511  * DllGetClassObject [DSOUND.@]
 512  * Retrieves class object from a DLL object
 513  *
 514  * NOTES
 515  *    Docs say returns STDAPI
 516  *
 517  * PARAMS
 518  *    rclsid [I] CLSID for the class object
 519  *    riid   [I] Reference to identifier of interface for class object
 520  *    ppv    [O] Address of variable to receive interface pointer for riid
 521  *
 522  * RETURNS
 523  *    Success: S_OK
 524  *    Failure: CLASS_E_CLASSNOTAVAILABLE, E_OUTOFMEMORY, E_INVALIDARG,
 525  *             E_UNEXPECTED
 526  */
 527 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 528 {
 529     int i = 0;
 530     TRACE("(%s, %s, %p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 531
 532     if (ppv == NULL) {
 533         WARN("invalid parameter\n");
 534         return E_INVALIDARG;
 535     }
 536
 537     *ppv = NULL;
 538
 539     if (!IsEqualIID(riid, &IID_IClassFactory) &&
 540         !IsEqualIID(riid, &IID_IUnknown)) {
 541         WARN("no interface for %s\n", debugstr_guid(riid));
 542         return E_NOINTERFACE;
 543     }
 544
 545     while (NULL != DSOUND_CF[i].rclsid) {
 546         if (IsEqualGUID(rclsid, DSOUND_CF[i].rclsid)) {
 547             DSCF_AddRef((IClassFactory*) &DSOUND_CF[i]);
 548             *ppv = &DSOUND_CF[i];
 549             return S_OK;
 550         }
 551         i++;
 552     }
 553
 554     WARN("(%s, %s, %p): no class found.\n", debugstr_guid(rclsid),
 555          debugstr_guid(riid), ppv);
 556     return CLASS_E_CLASSNOTAVAILABLE;
 557 }
 558
 559
 560 /*******************************************************************************
 561  * DllCanUnloadNow [DSOUND.4]
 562  * Determines whether the DLL is in use.
 563  *
 564  * RETURNS
 565  *    Success: S_OK
 566  *    Failure: S_FALSE
 567  */
 568 HRESULT WINAPI DllCanUnloadNow(void)
 569 {
 570     FIXME("(void): stub\n");
 571     return S_FALSE;
 572 }
 573
 574 #define INIT_GUID(guid, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8)      \
 575         guid.Data1 = l; guid.Data2 = w1; guid.Data3 = w2;               \
 576         guid.Data4[0] = b1; guid.Data4[1] = b2; guid.Data4[2] = b3;     \
 577         guid.Data4[3] = b4; guid.Data4[4] = b5; guid.Data4[5] = b6;     \
 578         guid.Data4[6] = b7; guid.Data4[7] = b8;
 579
 580 /***********************************************************************
 581  *           DllMain (DSOUND.init)
 582  */
 583 BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpvReserved)
 584 {
 585     int i;
 586     TRACE("(%p %d %p)\n", hInstDLL, fdwReason, lpvReserved);
 587
 588     switch (fdwReason) {
 589     case DLL_PROCESS_ATTACH:
 590         TRACE("DLL_PROCESS_ATTACH\n");
 591         for (i = 0; i < MAXWAVEDRIVERS; i++) {
 592             DSOUND_renderer[i] = NULL;
 593             DSOUND_capture[i] = NULL;
 594             INIT_GUID(DSOUND_renderer_guids[i], 0xbd6dd71a, 0x3deb, 0x11d1, 0xb1, 0x71, 0x00, 0xc0, 0x4f, 0xc2, 0x00, 0x00 + i);
 595             INIT_GUID(DSOUND_capture_guids[i],  0xbd6dd71b, 0x3deb, 0x11d1, 0xb1, 0x71, 0x00, 0xc0, 0x4f, 0xc2, 0x00, 0x00 + i);
 596         }
 597         break;
 598     case DLL_PROCESS_DETACH:
 599         TRACE("DLL_PROCESS_DETACH\n");
 600         break;
 601     case DLL_THREAD_ATTACH:
 602         TRACE("DLL_THREAD_ATTACH\n");
 603         break;
 604     case DLL_THREAD_DETACH:
 605         TRACE("DLL_THREAD_DETACH\n");
 606         break;
 607     default:
 608         TRACE("UNKNOWN REASON\n");
 609         break;
 610     }
 611     return TRUE;
 612 }