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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  * Most thread locking is complete. There may be a few race
  22  * conditions still lurking.
  23  *
  24  * TODO:
  25  *      Implement SetCooperativeLevel properly (need to address focus issues)
  26  *      Implement DirectSound3DBuffers (stubs in place)
  27  *      Use hardware 3D support if available
  28  *      Add critical section locking inside Release and AddRef methods
  29  *      Handle static buffers - put those in hardware, non-static not in hardware
  30  *      Hardware DuplicateSoundBuffer
  31  *      Proper volume calculation for 3d buffers
  32  *      Remove DS_HEL_FRAGS and use mixer fragment length for it
  33  */
  34
  35 #include <stdarg.h>
  36
  37 #define COBJMACROS
  38 #define NONAMELESSSTRUCT
  39 #define NONAMELESSUNION
  40 #include "windef.h"
  41 #include "winbase.h"
  42 #include "winuser.h"
  43 #include "winnls.h"
  44 #include "winreg.h"
  45 #include "mmsystem.h"
  46 #include "winternl.h"
  47 #include "mmddk.h"
  48 #include "wine/debug.h"
  49 #include "dsound.h"
  50 #include "dsconf.h"
  51 #include "ks.h"
  52 #include "initguid.h"
  53 #include "ksmedia.h"
  54 #include "dsdriver.h"
  55
  56 #include "dsound_private.h"
  57
  58 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
  59
  60 DirectSoundDevice*      DSOUND_renderer[MAXWAVEDRIVERS];
  61 GUID                    DSOUND_renderer_guids[MAXWAVEDRIVERS];
  62 GUID                    DSOUND_capture_guids[MAXWAVEDRIVERS];
  63
  64 HRESULT mmErr(UINT err)
  65 {
  66         switch(err) {
  67         case MMSYSERR_NOERROR:
  68                 return DS_OK;
  69         case MMSYSERR_ALLOCATED:
  70                 return DSERR_ALLOCATED;
  71         case MMSYSERR_ERROR:
  72         case MMSYSERR_INVALHANDLE:
  73         case WAVERR_STILLPLAYING:
  74                 return DSERR_GENERIC; /* FIXME */
  75         case MMSYSERR_NODRIVER:
  76                 return DSERR_NODRIVER;
  77         case MMSYSERR_NOMEM:
  78                 return DSERR_OUTOFMEMORY;
  79         case MMSYSERR_INVALPARAM:
  80         case WAVERR_BADFORMAT:
  81         case WAVERR_UNPREPARED:
  82                 return DSERR_INVALIDPARAM;
  83         case MMSYSERR_NOTSUPPORTED:
  84                 return DSERR_UNSUPPORTED;
  85         default:
  86                 FIXME("Unknown MMSYS error %d\n",err);
  87                 return DSERR_GENERIC;
  88         }
  89 }
  90
  91 /* All default settings, you most likely don't want to touch these, see wiki on UsefulRegistryKeys */
  92 int ds_emuldriver = 0;
  93 int ds_hel_buflen = 32768 * 2;
  94 int ds_snd_queue_max = 10;
  95 int ds_snd_queue_min = 6;
  96 int ds_snd_shadow_maxsize = 2;
  97 int ds_hw_accel = DS_HW_ACCEL_FULL;
  98 int ds_default_sample_rate = 44100;
  99 int ds_default_bits_per_sample = 16;
 100 static int ds_default_playback;
 101 static int ds_default_capture;
 102
 103 /*
 104  * Get a config key from either the app-specific or the default config
 105  */
 106
 107 static inline DWORD get_config_key( HKEY defkey, HKEY appkey, const char *name,
 108                                     char *buffer, DWORD size )
 109 {
 110     if (appkey && !RegQueryValueExA( appkey, name, 0, NULL, (LPBYTE)buffer, &size )) return 0;
 111     if (defkey && !RegQueryValueExA( defkey, name, 0, NULL, (LPBYTE)buffer, &size )) return 0;
 112     return ERROR_FILE_NOT_FOUND;
 113 }
 114
 115
 116 /*
 117  * Setup the dsound options.
 118  */
 119
 120 void setup_dsound_options(void)
 121 {
 122     char buffer[MAX_PATH+16];
 123     HKEY hkey, appkey = 0;
 124     DWORD len;
 125
 126     buffer[MAX_PATH]='\0';
 127
 128     /* @@ Wine registry key: HKCU\Software\Wine\DirectSound */
 129     if (RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\DirectSound", &hkey )) hkey = 0;
 130
 131     len = GetModuleFileNameA( 0, buffer, MAX_PATH );
 132     if (len && len < MAX_PATH)
 133     {
 134         HKEY tmpkey;
 135         /* @@ Wine registry key: HKCU\Software\Wine\AppDefaults\app.exe\DirectSound */
 136         if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\AppDefaults", &tmpkey ))
 137         {
 138             char *p, *appname = buffer;
 139             if ((p = strrchr( appname, '/' ))) appname = p + 1;
 140             if ((p = strrchr( appname, '\\' ))) appname = p + 1;
 141             strcat( appname, "\\DirectSound" );
 142             TRACE("appname = [%s]\n", appname);
 143             if (RegOpenKeyA( tmpkey, appname, &appkey )) appkey = 0;
 144             RegCloseKey( tmpkey );
 145         }
 146     }
 147
 148     /* get options */
 149
 150     if (!get_config_key( hkey, appkey, "EmulDriver", buffer, MAX_PATH ))
 151         ds_emuldriver = strcmp(buffer, "N");
 152
 153     if (!get_config_key( hkey, appkey, "HelBuflen", buffer, MAX_PATH ))
 154         ds_hel_buflen = atoi(buffer);
 155
 156     if (!get_config_key( hkey, appkey, "SndQueueMax", buffer, MAX_PATH ))
 157         ds_snd_queue_max = atoi(buffer);
 158
 159     if (!get_config_key( hkey, appkey, "SndQueueMin", buffer, MAX_PATH ))
 160         ds_snd_queue_min = atoi(buffer);
 161
 162     if (!get_config_key( hkey, appkey, "HardwareAcceleration", buffer, MAX_PATH )) {
 163         if (strcmp(buffer, "Full") == 0)
 164             ds_hw_accel = DS_HW_ACCEL_FULL;
 165         else if (strcmp(buffer, "Standard") == 0)
 166             ds_hw_accel = DS_HW_ACCEL_STANDARD;
 167         else if (strcmp(buffer, "Basic") == 0)
 168             ds_hw_accel = DS_HW_ACCEL_BASIC;
 169         else if (strcmp(buffer, "Emulation") == 0)
 170             ds_hw_accel = DS_HW_ACCEL_EMULATION;
 171     }
 172
 173     if (!get_config_key( hkey, appkey, "DefaultPlayback", buffer, MAX_PATH ))
 174         ds_default_playback = atoi(buffer);
 175
 176     if (!get_config_key( hkey, appkey, "MaxShadowSize", buffer, MAX_PATH ))
 177         ds_snd_shadow_maxsize = atoi(buffer);
 178
 179     if (!get_config_key( hkey, appkey, "DefaultCapture", buffer, MAX_PATH ))
 180         ds_default_capture = atoi(buffer);
 181
 182     if (!get_config_key( hkey, appkey, "DefaultSampleRate", buffer, MAX_PATH ))
 183         ds_default_sample_rate = atoi(buffer);
 184
 185     if (!get_config_key( hkey, appkey, "DefaultBitsPerSample", buffer, MAX_PATH ))
 186         ds_default_bits_per_sample = atoi(buffer);
 187
 188     if (appkey) RegCloseKey( appkey );
 189     if (hkey) RegCloseKey( hkey );
 190
 191     TRACE("ds_emuldriver = %d\n", ds_emuldriver);
 192     TRACE("ds_hel_buflen = %d\n", ds_hel_buflen);
 193     TRACE("ds_snd_queue_max = %d\n", ds_snd_queue_max);
 194     TRACE("ds_snd_queue_min = %d\n", ds_snd_queue_min);
 195     TRACE("ds_hw_accel = %s\n",
 196         ds_hw_accel==DS_HW_ACCEL_FULL ? "Full" :
 197         ds_hw_accel==DS_HW_ACCEL_STANDARD ? "Standard" :
 198         ds_hw_accel==DS_HW_ACCEL_BASIC ? "Basic" :
 199         ds_hw_accel==DS_HW_ACCEL_EMULATION ? "Emulation" :
 200         "Unknown");
 201     TRACE("ds_default_playback = %d\n", ds_default_playback);
 202     TRACE("ds_default_capture = %d\n", ds_default_playback);
 203     TRACE("ds_default_sample_rate = %d\n", ds_default_sample_rate);
 204     TRACE("ds_default_bits_per_sample = %d\n", ds_default_bits_per_sample);
 205     TRACE("ds_snd_shadow_maxsize = %d\n", ds_snd_shadow_maxsize);
 206 }
 207
 208 static const char * get_device_id(LPCGUID pGuid)
 209 {
 210     if (IsEqualGUID(&DSDEVID_DefaultPlayback, pGuid))
 211         return "DSDEVID_DefaultPlayback";
 212     else if (IsEqualGUID(&DSDEVID_DefaultVoicePlayback, pGuid))
 213         return "DSDEVID_DefaultVoicePlayback";
 214     else if (IsEqualGUID(&DSDEVID_DefaultCapture, pGuid))
 215         return "DSDEVID_DefaultCapture";
 216     else if (IsEqualGUID(&DSDEVID_DefaultVoiceCapture, pGuid))
 217         return "DSDEVID_DefaultVoiceCapture";
 218     return debugstr_guid(pGuid);
 219 }
 220
 221 /***************************************************************************
 222  * GetDeviceID  [DSOUND.9]
 223  *
 224  * Retrieves unique identifier of default device specified
 225  *
 226  * PARAMS
 227  *    pGuidSrc  [I] Address of device GUID.
 228  *    pGuidDest [O] Address to receive unique device GUID.
 229  *
 230  * RETURNS
 231  *    Success: DS_OK
 232  *    Failure: DSERR_INVALIDPARAM
 233  *
 234  * NOTES
 235  *    pGuidSrc is a valid device GUID or DSDEVID_DefaultPlayback,
 236  *    DSDEVID_DefaultCapture, DSDEVID_DefaultVoicePlayback, or
 237  *    DSDEVID_DefaultVoiceCapture.
 238  *    Returns pGuidSrc if pGuidSrc is a valid device or the device
 239  *    GUID for the specified constants.
 240  */
 241 HRESULT WINAPI GetDeviceID(LPCGUID pGuidSrc, LPGUID pGuidDest)
 242 {
 243     TRACE("(%s,%p)\n", get_device_id(pGuidSrc),pGuidDest);
 244
 245     if ( pGuidSrc == NULL) {
 246         WARN("invalid parameter: pGuidSrc == NULL\n");
 247         return DSERR_INVALIDPARAM;
 248     }
 249
 250     if ( pGuidDest == NULL ) {
 251         WARN("invalid parameter: pGuidDest == NULL\n");
 252         return DSERR_INVALIDPARAM;
 253     }
 254
 255     if ( IsEqualGUID( &DSDEVID_DefaultPlayback, pGuidSrc ) ||
 256          IsEqualGUID( &DSDEVID_DefaultVoicePlayback, pGuidSrc ) ) {
 257         *pGuidDest = DSOUND_renderer_guids[ds_default_playback];
 258         TRACE("returns %s\n", get_device_id(pGuidDest));
 259         return DS_OK;
 260     }
 261
 262     if ( IsEqualGUID( &DSDEVID_DefaultCapture, pGuidSrc ) ||
 263          IsEqualGUID( &DSDEVID_DefaultVoiceCapture, pGuidSrc ) ) {
 264         *pGuidDest = DSOUND_capture_guids[ds_default_capture];
 265         TRACE("returns %s\n", get_device_id(pGuidDest));
 266         return DS_OK;
 267     }
 268
 269     *pGuidDest = *pGuidSrc;
 270     TRACE("returns %s\n", get_device_id(pGuidDest));
 271
 272     return DS_OK;
 273 }
 274
 275
 276 /***************************************************************************
 277  * DirectSoundEnumerateA [DSOUND.2]
 278  *
 279  * Enumerate all DirectSound drivers installed in the system
 280  *
 281  * PARAMS
 282  *    lpDSEnumCallback  [I] Address of callback function.
 283  *    lpContext         [I] Address of user defined context passed to callback function.
 284  *
 285  * RETURNS
 286  *    Success: DS_OK
 287  *    Failure: DSERR_INVALIDPARAM
 288  */
 289 HRESULT WINAPI DirectSoundEnumerateA(
 290     LPDSENUMCALLBACKA lpDSEnumCallback,
 291     LPVOID lpContext)
 292 {
 293     unsigned devs, wod;
 294     DSDRIVERDESC desc;
 295     GUID guid;
 296     int err;
 297
 298     TRACE("lpDSEnumCallback = %p, lpContext = %p\n",
 299         lpDSEnumCallback, lpContext);
 300
 301     if (lpDSEnumCallback == NULL) {
 302         WARN("invalid parameter: lpDSEnumCallback == NULL\n");
 303         return DSERR_INVALIDPARAM;
 304     }
 305
 306     devs = waveOutGetNumDevs();
 307     if (devs > 0) {
 308         if (GetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) {
 309             for (wod = 0; wod < devs; ++wod) {
 310                 if (IsEqualGUID( &guid, &DSOUND_renderer_guids[wod]) ) {
 311                     err = mmErr(waveOutMessage(UlongToHandle(wod),DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 312                     if (err == DS_OK) {
 313                         TRACE("calling lpDSEnumCallback(NULL,\"%s\",\"%s\",%p)\n",
 314                               "Primary Sound Driver","",lpContext);
 315                         if (lpDSEnumCallback(NULL, "Primary Sound Driver", "", lpContext) == FALSE)
 316                             return DS_OK;
 317                     }
 318                 }
 319             }
 320         }
 321     }
 322
 323     for (wod = 0; wod < devs; ++wod) {
 324         err = mmErr(waveOutMessage(UlongToHandle(wod),DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 325         if (err == DS_OK) {
 326             TRACE("calling lpDSEnumCallback(%s,\"%s\",\"%s\",%p)\n",
 327                   debugstr_guid(&DSOUND_renderer_guids[wod]),desc.szDesc,desc.szDrvname,lpContext);
 328             if (lpDSEnumCallback(&DSOUND_renderer_guids[wod], desc.szDesc, desc.szDrvname, lpContext) == FALSE)
 329                 return DS_OK;
 330         }
 331     }
 332     return DS_OK;
 333 }
 334
 335 /***************************************************************************
 336  * DirectSoundEnumerateW [DSOUND.3]
 337  *
 338  * Enumerate all DirectSound drivers installed in the system
 339  *
 340  * PARAMS
 341  *    lpDSEnumCallback  [I] Address of callback function.
 342  *    lpContext         [I] Address of user defined context passed to callback function.
 343  *
 344  * RETURNS
 345  *    Success: DS_OK
 346  *    Failure: DSERR_INVALIDPARAM
 347  */
 348 HRESULT WINAPI DirectSoundEnumerateW(
 349         LPDSENUMCALLBACKW lpDSEnumCallback,
 350         LPVOID lpContext )
 351 {
 352     unsigned devs, wod;
 353     DSDRIVERDESC desc;
 354     GUID guid;
 355     int err;
 356     WCHAR wDesc[MAXPNAMELEN];
 357     WCHAR wName[MAXPNAMELEN];
 358
 359     TRACE("lpDSEnumCallback = %p, lpContext = %p\n",
 360         lpDSEnumCallback, lpContext);
 361
 362     if (lpDSEnumCallback == NULL) {
 363         WARN("invalid parameter: lpDSEnumCallback == NULL\n");
 364         return DSERR_INVALIDPARAM;
 365     }
 366
 367     devs = waveOutGetNumDevs();
 368     if (devs > 0) {
 369         if (GetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) {
 370             static const WCHAR empty[] = { 0 };
 371             for (wod = 0; wod < devs; ++wod) {
 372                 if (IsEqualGUID( &guid, &DSOUND_renderer_guids[wod] ) ) {
 373                     err = mmErr(waveOutMessage(UlongToHandle(wod),DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 374                     if (err == DS_OK) {
 375                         TRACE("calling lpDSEnumCallback(NULL,\"%s\",\"%s\",%p)\n",
 376                               "Primary Sound Driver",desc.szDrvname,lpContext);
 377                         MultiByteToWideChar( CP_ACP, 0, "Primary Sound Driver", -1,
 378                                              wDesc, sizeof(wDesc)/sizeof(WCHAR) );
 379                         if (lpDSEnumCallback(NULL, wDesc, empty, lpContext) == FALSE)
 380                             return DS_OK;
 381                     }
 382                 }
 383             }
 384         }
 385     }
 386
 387     for (wod = 0; wod < devs; ++wod) {
 388         err = mmErr(waveOutMessage(UlongToHandle(wod),DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 389         if (err == DS_OK) {
 390             TRACE("calling lpDSEnumCallback(%s,\"%s\",\"%s\",%p)\n",
 391                   debugstr_guid(&DSOUND_renderer_guids[wod]),desc.szDesc,desc.szDrvname,lpContext);
 392             MultiByteToWideChar( CP_ACP, 0, desc.szDesc, -1,
 393                                  wDesc, sizeof(wDesc)/sizeof(WCHAR) );
 394             MultiByteToWideChar( CP_ACP, 0, desc.szDrvname, -1,
 395                                  wName, sizeof(wName)/sizeof(WCHAR) );
 396             if (lpDSEnumCallback(&DSOUND_renderer_guids[wod], wDesc, wName, lpContext) == FALSE)
 397                 return DS_OK;
 398         }
 399     }
 400     return DS_OK;
 401 }
 402
 403 /*******************************************************************************
 404  * DirectSound ClassFactory
 405  */
 406
 407 typedef  HRESULT (*FnCreateInstance)(REFIID riid, LPVOID *ppobj);
 408
 409 typedef struct {
 410     const IClassFactoryVtbl *lpVtbl;
 411     LONG ref;
 412     REFCLSID rclsid;
 413     FnCreateInstance pfnCreateInstance;
 414 } IClassFactoryImpl;
 415
 416 static HRESULT WINAPI
 417 DSCF_QueryInterface(LPCLASSFACTORY iface, REFIID riid, LPVOID *ppobj)
 418 {
 419     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 420     TRACE("(%p, %s, %p)\n", This, debugstr_guid(riid), ppobj);
 421     if (ppobj == NULL)
 422         return E_POINTER;
 423     if (IsEqualIID(riid, &IID_IUnknown) ||
 424         IsEqualIID(riid, &IID_IClassFactory))
 425     {
 426         *ppobj = iface;
 427         IUnknown_AddRef(iface);
 428         return S_OK;
 429     }
 430     *ppobj = NULL;
 431     return E_NOINTERFACE;
 432 }
 433
 434 static ULONG WINAPI DSCF_AddRef(LPCLASSFACTORY iface)
 435 {
 436     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 437     ULONG ref = InterlockedIncrement(&(This->ref));
 438     TRACE("(%p) ref was %d\n", This, ref - 1);
 439     return ref;
 440 }
 441
 442 static ULONG WINAPI DSCF_Release(LPCLASSFACTORY iface)
 443 {
 444     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 445     ULONG ref = InterlockedDecrement(&(This->ref));
 446     TRACE("(%p) ref was %d\n", This, ref + 1);
 447     /* static class, won't be freed */
 448     return ref;
 449 }
 450
 451 static HRESULT WINAPI DSCF_CreateInstance(
 452     LPCLASSFACTORY iface,
 453     LPUNKNOWN pOuter,
 454     REFIID riid,
 455     LPVOID *ppobj)
 456 {
 457     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 458     TRACE("(%p, %p, %s, %p)\n", This, pOuter, debugstr_guid(riid), ppobj);
 459
 460     if (pOuter)
 461         return CLASS_E_NOAGGREGATION;
 462
 463     if (ppobj == NULL) {
 464         WARN("invalid parameter\n");
 465         return DSERR_INVALIDPARAM;
 466     }
 467     *ppobj = NULL;
 468     return This->pfnCreateInstance(riid, ppobj);
 469 }
 470
 471 static HRESULT WINAPI DSCF_LockServer(LPCLASSFACTORY iface, BOOL dolock)
 472 {
 473     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 474     FIXME("(%p, %d) stub!\n", This, dolock);
 475     return S_OK;
 476 }
 477
 478 static const IClassFactoryVtbl DSCF_Vtbl = {
 479     DSCF_QueryInterface,
 480     DSCF_AddRef,
 481     DSCF_Release,
 482     DSCF_CreateInstance,
 483     DSCF_LockServer
 484 };
 485
 486 static IClassFactoryImpl DSOUND_CF[] = {
 487     { &DSCF_Vtbl, 1, &CLSID_DirectSound, (FnCreateInstance)DSOUND_Create },
 488     { &DSCF_Vtbl, 1, &CLSID_DirectSound8, (FnCreateInstance)DSOUND_Create8 },
 489     { &DSCF_Vtbl, 1, &CLSID_DirectSoundCapture, (FnCreateInstance)DSOUND_CaptureCreate },
 490     { &DSCF_Vtbl, 1, &CLSID_DirectSoundCapture8, (FnCreateInstance)DSOUND_CaptureCreate8 },
 491     { &DSCF_Vtbl, 1, &CLSID_DirectSoundFullDuplex, (FnCreateInstance)DSOUND_FullDuplexCreate },
 492     { &DSCF_Vtbl, 1, &CLSID_DirectSoundPrivate, (FnCreateInstance)IKsPrivatePropertySetImpl_Create },
 493     { NULL, 0, NULL, NULL }
 494 };
 495
 496 /*******************************************************************************
 497  * DllGetClassObject [DSOUND.@]
 498  * Retrieves class object from a DLL object
 499  *
 500  * NOTES
 501  *    Docs say returns STDAPI
 502  *
 503  * PARAMS
 504  *    rclsid [I] CLSID for the class object
 505  *    riid   [I] Reference to identifier of interface for class object
 506  *    ppv    [O] Address of variable to receive interface pointer for riid
 507  *
 508  * RETURNS
 509  *    Success: S_OK
 510  *    Failure: CLASS_E_CLASSNOTAVAILABLE, E_OUTOFMEMORY, E_INVALIDARG,
 511  *             E_UNEXPECTED
 512  */
 513 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 514 {
 515     int i = 0;
 516     TRACE("(%s, %s, %p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 517
 518     if (ppv == NULL) {
 519         WARN("invalid parameter\n");
 520         return E_INVALIDARG;
 521     }
 522
 523     *ppv = NULL;
 524
 525     if (!IsEqualIID(riid, &IID_IClassFactory) &&
 526         !IsEqualIID(riid, &IID_IUnknown)) {
 527         WARN("no interface for %s\n", debugstr_guid(riid));
 528         return E_NOINTERFACE;
 529     }
 530
 531     while (NULL != DSOUND_CF[i].rclsid) {
 532         if (IsEqualGUID(rclsid, DSOUND_CF[i].rclsid)) {
 533             DSCF_AddRef((IClassFactory*) &DSOUND_CF[i]);
 534             *ppv = &DSOUND_CF[i];
 535             return S_OK;
 536         }
 537         i++;
 538     }
 539
 540     WARN("(%s, %s, %p): no class found.\n", debugstr_guid(rclsid),
 541          debugstr_guid(riid), ppv);
 542     return CLASS_E_CLASSNOTAVAILABLE;
 543 }
 544
 545
 546 /*******************************************************************************
 547  * DllCanUnloadNow [DSOUND.4]
 548  * Determines whether the DLL is in use.
 549  *
 550  * RETURNS
 551  *    Success: S_OK
 552  *    Failure: S_FALSE
 553  */
 554 HRESULT WINAPI DllCanUnloadNow(void)
 555 {
 556     FIXME("(void): stub\n");
 557     return S_FALSE;
 558 }
 559
 560 #define INIT_GUID(guid, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8)      \
 561         guid.Data1 = l; guid.Data2 = w1; guid.Data3 = w2;               \
 562         guid.Data4[0] = b1; guid.Data4[1] = b2; guid.Data4[2] = b3;     \
 563         guid.Data4[3] = b4; guid.Data4[4] = b5; guid.Data4[5] = b6;     \
 564         guid.Data4[6] = b7; guid.Data4[7] = b8;
 565
 566 /***********************************************************************
 567  *           DllMain (DSOUND.init)
 568  */
 569 BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpvReserved)
 570 {
 571     int i;
 572     TRACE("(%p %d %p)\n", hInstDLL, fdwReason, lpvReserved);
 573
 574     switch (fdwReason) {
 575     case DLL_PROCESS_ATTACH:
 576         TRACE("DLL_PROCESS_ATTACH\n");
 577         for (i = 0; i < MAXWAVEDRIVERS; i++) {
 578             DSOUND_renderer[i] = NULL;
 579             DSOUND_capture[i] = NULL;
 580             INIT_GUID(DSOUND_renderer_guids[i], 0xbd6dd71a, 0x3deb, 0x11d1, 0xb1, 0x71, 0x00, 0xc0, 0x4f, 0xc2, 0x00, 0x00 + i);
 581             INIT_GUID(DSOUND_capture_guids[i],  0xbd6dd71b, 0x3deb, 0x11d1, 0xb1, 0x71, 0x00, 0xc0, 0x4f, 0xc2, 0x00, 0x00 + i);
 582         }
 583         DisableThreadLibraryCalls(hInstDLL);
 584         /* Increase refcount on dsound by 1 */
 585         GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS, (LPCWSTR)hInstDLL, &hInstDLL);
 586         break;
 587     case DLL_PROCESS_DETACH:
 588         TRACE("DLL_PROCESS_DETACH\n");
 589         break;
 590     default:
 591         TRACE("UNKNOWN REASON\n");
 592         break;
 593     }
 594     return TRUE;
 595 }