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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_SND_QUEUE_MAX 10 /* max number of fragments to prebuffer */
  65
  66 DirectSoundDevice*      DSOUND_renderer[MAXWAVEDRIVERS];
  67 GUID                    DSOUND_renderer_guids[MAXWAVEDRIVERS];
  68 GUID                    DSOUND_capture_guids[MAXWAVEDRIVERS];
  69
  70 HRESULT mmErr(UINT err)
  71 {
  72         switch(err) {
  73         case MMSYSERR_NOERROR:
  74                 return DS_OK;
  75         case MMSYSERR_ALLOCATED:
  76                 return DSERR_ALLOCATED;
  77         case MMSYSERR_ERROR:
  78         case MMSYSERR_INVALHANDLE:
  79         case WAVERR_STILLPLAYING:
  80                 return DSERR_GENERIC; /* FIXME */
  81         case MMSYSERR_NODRIVER:
  82                 return DSERR_NODRIVER;
  83         case MMSYSERR_NOMEM:
  84                 return DSERR_OUTOFMEMORY;
  85         case MMSYSERR_INVALPARAM:
  86         case WAVERR_BADFORMAT:
  87         case WAVERR_UNPREPARED:
  88                 return DSERR_INVALIDPARAM;
  89         case MMSYSERR_NOTSUPPORTED:
  90                 return DSERR_UNSUPPORTED;
  91         default:
  92                 FIXME("Unknown MMSYS error %d\n",err);
  93                 return DSERR_GENERIC;
  94         }
  95 }
  96
  97 int ds_emuldriver = DS_EMULDRIVER;
  98 int ds_snd_queue_max = DS_SND_QUEUE_MAX;
  99 int ds_hw_accel = DS_HW_ACCEL_FULL;
 100 int ds_default_playback = 0;
 101 int ds_default_capture = 0;
 102 int ds_default_sample_rate = 22050;
 103 int ds_default_bits_per_sample = 8;
 104
 105 /*
 106  * Get a config key from either the app-specific or the default config
 107  */
 108
 109 static inline DWORD get_config_key( HKEY defkey, HKEY appkey, const char *name,
 110                                     char *buffer, DWORD size )
 111 {
 112     if (appkey && !RegQueryValueExA( appkey, name, 0, NULL, (LPBYTE)buffer, &size )) return 0;
 113     if (defkey && !RegQueryValueExA( defkey, name, 0, NULL, (LPBYTE)buffer, &size )) return 0;
 114     return ERROR_FILE_NOT_FOUND;
 115 }
 116
 117
 118 /*
 119  * Setup the dsound options.
 120  */
 121
 122 void setup_dsound_options(void)
 123 {
 124     char buffer[MAX_PATH+16];
 125     HKEY hkey, appkey = 0;
 126     DWORD len;
 127
 128     buffer[MAX_PATH]='\0';
 129
 130     /* @@ Wine registry key: HKCU\Software\Wine\DirectSound */
 131     if (RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\DirectSound", &hkey )) hkey = 0;
 132
 133     len = GetModuleFileNameA( 0, buffer, MAX_PATH );
 134     if (len && len < MAX_PATH)
 135     {
 136         HKEY tmpkey;
 137         /* @@ Wine registry key: HKCU\Software\Wine\AppDefaults\app.exe\DirectSound */
 138         if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\AppDefaults", &tmpkey ))
 139         {
 140             char *p, *appname = buffer;
 141             if ((p = strrchr( appname, '/' ))) appname = p + 1;
 142             if ((p = strrchr( appname, '\\' ))) appname = p + 1;
 143             strcat( appname, "\\DirectSound" );
 144             TRACE("appname = [%s]\n", appname);
 145             if (RegOpenKeyA( tmpkey, appname, &appkey )) appkey = 0;
 146             RegCloseKey( tmpkey );
 147         }
 148     }
 149
 150     /* get options */
 151
 152     if (!get_config_key( hkey, appkey, "EmulDriver", buffer, MAX_PATH ))
 153         ds_emuldriver = strcmp(buffer, "N");
 154
 155     if (!get_config_key( hkey, appkey, "SndQueueMax", buffer, MAX_PATH ))
 156         ds_snd_queue_max = atoi(buffer);
 157
 158     if (!get_config_key( hkey, appkey, "HardwareAcceleration", buffer, MAX_PATH )) {
 159         if (strcmp(buffer, "Full") == 0)
 160             ds_hw_accel = DS_HW_ACCEL_FULL;
 161         else if (strcmp(buffer, "Standard") == 0)
 162             ds_hw_accel = DS_HW_ACCEL_STANDARD;
 163         else if (strcmp(buffer, "Basic") == 0)
 164             ds_hw_accel = DS_HW_ACCEL_BASIC;
 165         else if (strcmp(buffer, "Emulation") == 0)
 166             ds_hw_accel = DS_HW_ACCEL_EMULATION;
 167     }
 168
 169     if (!get_config_key( hkey, appkey, "DefaultPlayback", buffer, MAX_PATH ))
 170             ds_default_playback = atoi(buffer);
 171
 172     if (!get_config_key( hkey, appkey, "DefaultCapture", buffer, MAX_PATH ))
 173             ds_default_capture = atoi(buffer);
 174
 175     if (!get_config_key( hkey, appkey, "DefaultSampleRate", buffer, MAX_PATH ))
 176             ds_default_sample_rate = atoi(buffer);
 177
 178     if (!get_config_key( hkey, appkey, "DefaultBitsPerSample", buffer, MAX_PATH ))
 179             ds_default_bits_per_sample = atoi(buffer);
 180
 181     if (appkey) RegCloseKey( appkey );
 182     if (hkey) RegCloseKey( hkey );
 183
 184     if (ds_emuldriver != DS_EMULDRIVER )
 185        WARN("ds_emuldriver = %d (default=%d)\n",ds_emuldriver, DS_EMULDRIVER);
 186     if (ds_snd_queue_max != DS_SND_QUEUE_MAX)
 187        WARN("ds_snd_queue_max = %d (default=%d)\n",ds_snd_queue_max ,DS_SND_QUEUE_MAX);
 188     if (ds_hw_accel != DS_HW_ACCEL_FULL)
 189         WARN("ds_hw_accel = %s (default=Full)\n",
 190             ds_hw_accel==DS_HW_ACCEL_FULL ? "Full" :
 191             ds_hw_accel==DS_HW_ACCEL_STANDARD ? "Standard" :
 192             ds_hw_accel==DS_HW_ACCEL_BASIC ? "Basic" :
 193             ds_hw_accel==DS_HW_ACCEL_EMULATION ? "Emulation" :
 194             "Unknown");
 195     if (ds_default_playback != 0)
 196         WARN("ds_default_playback = %d (default=0)\n",ds_default_playback);
 197     if (ds_default_capture != 0)
 198         WARN("ds_default_capture = %d (default=0)\n",ds_default_playback);
 199     if (ds_default_sample_rate != 22050)
 200         WARN("ds_default_sample_rate = %d (default=22050)\n",ds_default_sample_rate);
 201     if (ds_default_bits_per_sample != 8)
 202         WARN("ds_default_bits_per_sample = %d (default=8)\n",ds_default_bits_per_sample);
 203 }
 204
 205 static const char * get_device_id(LPCGUID pGuid)
 206 {
 207     if (IsEqualGUID(&DSDEVID_DefaultPlayback, pGuid))
 208         return "DSDEVID_DefaultPlayback";
 209     else if (IsEqualGUID(&DSDEVID_DefaultVoicePlayback, pGuid))
 210         return "DSDEVID_DefaultVoicePlayback";
 211     else if (IsEqualGUID(&DSDEVID_DefaultCapture, pGuid))
 212         return "DSDEVID_DefaultCapture";
 213     else if (IsEqualGUID(&DSDEVID_DefaultVoiceCapture, pGuid))
 214         return "DSDEVID_DefaultVoiceCapture";
 215     return debugstr_guid(pGuid);
 216 }
 217
 218 /***************************************************************************
 219  * GetDeviceID  [DSOUND.9]
 220  *
 221  * Retrieves unique identifier of default device specified
 222  *
 223  * PARAMS
 224  *    pGuidSrc  [I] Address of device GUID.
 225  *    pGuidDest [O] Address to receive unique device GUID.
 226  *
 227  * RETURNS
 228  *    Success: DS_OK
 229  *    Failure: DSERR_INVALIDPARAM
 230  *
 231  * NOTES
 232  *    pGuidSrc is a valid device GUID or DSDEVID_DefaultPlayback,
 233  *    DSDEVID_DefaultCapture, DSDEVID_DefaultVoicePlayback, or
 234  *    DSDEVID_DefaultVoiceCapture.
 235  *    Returns pGuidSrc if pGuidSrc is a valid device or the device
 236  *    GUID for the specified constants.
 237  */
 238 HRESULT WINAPI GetDeviceID(LPCGUID pGuidSrc, LPGUID pGuidDest)
 239 {
 240     TRACE("(%s,%p)\n", get_device_id(pGuidSrc),pGuidDest);
 241
 242     if ( pGuidSrc == NULL) {
 243         WARN("invalid parameter: pGuidSrc == NULL\n");
 244         return DSERR_INVALIDPARAM;
 245     }
 246
 247     if ( pGuidDest == NULL ) {
 248         WARN("invalid parameter: pGuidDest == NULL\n");
 249         return DSERR_INVALIDPARAM;
 250     }
 251
 252     if ( IsEqualGUID( &DSDEVID_DefaultPlayback, pGuidSrc ) ||
 253          IsEqualGUID( &DSDEVID_DefaultVoicePlayback, pGuidSrc ) ) {
 254         CopyMemory(pGuidDest, &DSOUND_renderer_guids[ds_default_playback], sizeof(GUID));
 255         TRACE("returns %s\n", get_device_id(pGuidDest));
 256         return DS_OK;
 257     }
 258
 259     if ( IsEqualGUID( &DSDEVID_DefaultCapture, pGuidSrc ) ||
 260          IsEqualGUID( &DSDEVID_DefaultVoiceCapture, pGuidSrc ) ) {
 261         CopyMemory(pGuidDest, &DSOUND_capture_guids[ds_default_capture], sizeof(GUID));
 262         TRACE("returns %s\n", get_device_id(pGuidDest));
 263         return DS_OK;
 264     }
 265
 266     CopyMemory(pGuidDest, pGuidSrc, sizeof(GUID));
 267     TRACE("returns %s\n", get_device_id(pGuidDest));
 268
 269     return DS_OK;
 270 }
 271
 272
 273 /***************************************************************************
 274  * DirectSoundEnumerateA [DSOUND.2]
 275  *
 276  * Enumerate all DirectSound drivers installed in the system
 277  *
 278  * PARAMS
 279  *    lpDSEnumCallback  [I] Address of callback function.
 280  *    lpContext         [I] Address of user defined context passed to callback function.
 281  *
 282  * RETURNS
 283  *    Success: DS_OK
 284  *    Failure: DSERR_INVALIDPARAM
 285  */
 286 HRESULT WINAPI DirectSoundEnumerateA(
 287     LPDSENUMCALLBACKA lpDSEnumCallback,
 288     LPVOID lpContext)
 289 {
 290     unsigned devs, wod;
 291     DSDRIVERDESC desc;
 292     GUID guid;
 293     int err;
 294
 295     TRACE("lpDSEnumCallback = %p, lpContext = %p\n",
 296         lpDSEnumCallback, lpContext);
 297
 298     if (lpDSEnumCallback == NULL) {
 299         WARN("invalid parameter: lpDSEnumCallback == NULL\n");
 300         return DSERR_INVALIDPARAM;
 301     }
 302
 303     devs = waveOutGetNumDevs();
 304     if (devs > 0) {
 305         if (GetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) {
 306             for (wod = 0; wod < devs; ++wod) {
 307                 if (IsEqualGUID( &guid, &DSOUND_renderer_guids[wod]) ) {
 308                     err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 309                     if (err == DS_OK) {
 310                         TRACE("calling lpDSEnumCallback(NULL,\"%s\",\"%s\",%p)\n",
 311                               "Primary Sound Driver",desc.szDrvname,lpContext);
 312                         if (lpDSEnumCallback(NULL, "Primary Sound Driver", desc.szDrvname, lpContext) == FALSE)
 313                             return DS_OK;
 314                     }
 315                 }
 316             }
 317         }
 318     }
 319
 320     for (wod = 0; wod < devs; ++wod) {
 321         err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 322         if (err == DS_OK) {
 323             TRACE("calling lpDSEnumCallback(%s,\"%s\",\"%s\",%p)\n",
 324                   debugstr_guid(&DSOUND_renderer_guids[wod]),desc.szDesc,desc.szDrvname,lpContext);
 325             if (lpDSEnumCallback(&DSOUND_renderer_guids[wod], desc.szDesc, desc.szDrvname, lpContext) == FALSE)
 326                 return DS_OK;
 327         }
 328     }
 329     return DS_OK;
 330 }
 331
 332 /***************************************************************************
 333  * DirectSoundEnumerateW [DSOUND.3]
 334  *
 335  * Enumerate all DirectSound drivers installed in the system
 336  *
 337  * PARAMS
 338  *    lpDSEnumCallback  [I] Address of callback function.
 339  *    lpContext         [I] Address of user defined context passed to callback function.
 340  *
 341  * RETURNS
 342  *    Success: DS_OK
 343  *    Failure: DSERR_INVALIDPARAM
 344  */
 345 HRESULT WINAPI DirectSoundEnumerateW(
 346         LPDSENUMCALLBACKW lpDSEnumCallback,
 347         LPVOID lpContext )
 348 {
 349     unsigned devs, wod;
 350     DSDRIVERDESC desc;
 351     GUID guid;
 352     int err;
 353     WCHAR wDesc[MAXPNAMELEN];
 354     WCHAR wName[MAXPNAMELEN];
 355
 356     TRACE("lpDSEnumCallback = %p, lpContext = %p\n",
 357         lpDSEnumCallback, lpContext);
 358
 359     if (lpDSEnumCallback == NULL) {
 360         WARN("invalid parameter: lpDSEnumCallback == NULL\n");
 361         return DSERR_INVALIDPARAM;
 362     }
 363
 364     devs = waveOutGetNumDevs();
 365     if (devs > 0) {
 366         if (GetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) {
 367             for (wod = 0; wod < devs; ++wod) {
 368                 if (IsEqualGUID( &guid, &DSOUND_renderer_guids[wod] ) ) {
 369                     err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 370                     if (err == DS_OK) {
 371                         TRACE("calling lpDSEnumCallback(NULL,\"%s\",\"%s\",%p)\n",
 372                               "Primary Sound Driver",desc.szDrvname,lpContext);
 373                         MultiByteToWideChar( CP_ACP, 0, "Primary Sound Driver", -1,
 374                                              wDesc, sizeof(wDesc)/sizeof(WCHAR) );
 375                         MultiByteToWideChar( CP_ACP, 0, desc.szDrvname, -1,
 376                                              wName, sizeof(wName)/sizeof(WCHAR) );
 377                         if (lpDSEnumCallback(NULL, wDesc, wName, lpContext) == FALSE)
 378                             return DS_OK;
 379                     }
 380                 }
 381             }
 382         }
 383     }
 384
 385     for (wod = 0; wod < devs; ++wod) {
 386         err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 387         if (err == DS_OK) {
 388             TRACE("calling lpDSEnumCallback(%s,\"%s\",\"%s\",%p)\n",
 389                   debugstr_guid(&DSOUND_renderer_guids[wod]),desc.szDesc,desc.szDrvname,lpContext);
 390             MultiByteToWideChar( CP_ACP, 0, desc.szDesc, -1,
 391                                  wDesc, sizeof(wDesc)/sizeof(WCHAR) );
 392             MultiByteToWideChar( CP_ACP, 0, desc.szDrvname, -1,
 393                                  wName, sizeof(wName)/sizeof(WCHAR) );
 394             if (lpDSEnumCallback(&DSOUND_renderer_guids[wod], wDesc, wName, lpContext) == FALSE)
 395                 return DS_OK;
 396         }
 397     }
 398     return DS_OK;
 399 }
 400
 401 /*******************************************************************************
 402  * DirectSound ClassFactory
 403  */
 404
 405 typedef  HRESULT (*FnCreateInstance)(REFIID riid, LPVOID *ppobj);
 406
 407 typedef struct {
 408     const IClassFactoryVtbl *lpVtbl;
 409     LONG ref;
 410     REFCLSID rclsid;
 411     FnCreateInstance pfnCreateInstance;
 412 } IClassFactoryImpl;
 413
 414 static HRESULT WINAPI
 415 DSCF_QueryInterface(LPCLASSFACTORY iface, REFIID riid, LPVOID *ppobj)
 416 {
 417     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 418     TRACE("(%p, %s, %p)\n", This, debugstr_guid(riid), ppobj);
 419     if (ppobj == NULL)
 420         return E_POINTER;
 421     if (IsEqualIID(riid, &IID_IUnknown) ||
 422         IsEqualIID(riid, &IID_IClassFactory))
 423     {
 424         *ppobj = iface;
 425         IUnknown_AddRef(iface);
 426         return S_OK;
 427     }
 428     *ppobj = NULL;
 429     return E_NOINTERFACE;
 430 }
 431
 432 static ULONG WINAPI DSCF_AddRef(LPCLASSFACTORY iface)
 433 {
 434     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 435     ULONG ref = InterlockedIncrement(&(This->ref));
 436     TRACE("(%p) ref was %d\n", This, ref - 1);
 437     return ref;
 438 }
 439
 440 static ULONG WINAPI DSCF_Release(LPCLASSFACTORY iface)
 441 {
 442     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 443     ULONG ref = InterlockedDecrement(&(This->ref));
 444     TRACE("(%p) ref was %d\n", This, ref + 1);
 445     /* static class, won't be freed */
 446     return ref;
 447 }
 448
 449 static HRESULT WINAPI DSCF_CreateInstance(
 450     LPCLASSFACTORY iface,
 451     LPUNKNOWN pOuter,
 452     REFIID riid,
 453     LPVOID *ppobj)
 454 {
 455     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 456     TRACE("(%p, %p, %s, %p)\n", This, pOuter, debugstr_guid(riid), ppobj);
 457
 458     if (pOuter)
 459         return CLASS_E_NOAGGREGATION;
 460
 461     if (ppobj == NULL) {
 462         WARN("invalid parameter\n");
 463         return DSERR_INVALIDPARAM;
 464     }
 465     *ppobj = NULL;
 466     return This->pfnCreateInstance(riid, ppobj);
 467 }
 468
 469 static HRESULT WINAPI DSCF_LockServer(LPCLASSFACTORY iface, BOOL dolock)
 470 {
 471     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 472     FIXME("(%p, %d) stub!\n", This, dolock);
 473     return S_OK;
 474 }
 475
 476 static const IClassFactoryVtbl DSCF_Vtbl = {
 477     DSCF_QueryInterface,
 478     DSCF_AddRef,
 479     DSCF_Release,
 480     DSCF_CreateInstance,
 481     DSCF_LockServer
 482 };
 483
 484 static IClassFactoryImpl DSOUND_CF[] = {
 485     { &DSCF_Vtbl, 1, &CLSID_DirectSound, (FnCreateInstance)DSOUND_Create },
 486     { &DSCF_Vtbl, 1, &CLSID_DirectSound8, (FnCreateInstance)DSOUND_Create8 },
 487     { &DSCF_Vtbl, 1, &CLSID_DirectSoundCapture, (FnCreateInstance)DSOUND_CaptureCreate },
 488     { &DSCF_Vtbl, 1, &CLSID_DirectSoundCapture8, (FnCreateInstance)DSOUND_CaptureCreate8 },
 489     { &DSCF_Vtbl, 1, &CLSID_DirectSoundFullDuplex, (FnCreateInstance)DSOUND_FullDuplexCreate },
 490     { &DSCF_Vtbl, 1, &CLSID_DirectSoundPrivate, (FnCreateInstance)IKsPrivatePropertySetImpl_Create },
 491     { NULL, 0, NULL, NULL }
 492 };
 493
 494 /*******************************************************************************
 495  * DllGetClassObject [DSOUND.@]
 496  * Retrieves class object from a DLL object
 497  *
 498  * NOTES
 499  *    Docs say returns STDAPI
 500  *
 501  * PARAMS
 502  *    rclsid [I] CLSID for the class object
 503  *    riid   [I] Reference to identifier of interface for class object
 504  *    ppv    [O] Address of variable to receive interface pointer for riid
 505  *
 506  * RETURNS
 507  *    Success: S_OK
 508  *    Failure: CLASS_E_CLASSNOTAVAILABLE, E_OUTOFMEMORY, E_INVALIDARG,
 509  *             E_UNEXPECTED
 510  */
 511 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 512 {
 513     int i = 0;
 514     TRACE("(%s, %s, %p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 515
 516     if (ppv == NULL) {
 517         WARN("invalid parameter\n");
 518         return E_INVALIDARG;
 519     }
 520
 521     *ppv = NULL;
 522
 523     if (!IsEqualIID(riid, &IID_IClassFactory) &&
 524         !IsEqualIID(riid, &IID_IUnknown)) {
 525         WARN("no interface for %s\n", debugstr_guid(riid));
 526         return E_NOINTERFACE;
 527     }
 528
 529     while (NULL != DSOUND_CF[i].rclsid) {
 530         if (IsEqualGUID(rclsid, DSOUND_CF[i].rclsid)) {
 531             DSCF_AddRef((IClassFactory*) &DSOUND_CF[i]);
 532             *ppv = &DSOUND_CF[i];
 533             return S_OK;
 534         }
 535         i++;
 536     }
 537
 538     WARN("(%s, %s, %p): no class found.\n", debugstr_guid(rclsid),
 539          debugstr_guid(riid), ppv);
 540     return CLASS_E_CLASSNOTAVAILABLE;
 541 }
 542
 543
 544 /*******************************************************************************
 545  * DllCanUnloadNow [DSOUND.4]
 546  * Determines whether the DLL is in use.
 547  *
 548  * RETURNS
 549  *    Success: S_OK
 550  *    Failure: S_FALSE
 551  */
 552 HRESULT WINAPI DllCanUnloadNow(void)
 553 {
 554     FIXME("(void): stub\n");
 555     return S_FALSE;
 556 }
 557
 558 #define INIT_GUID(guid, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8)      \
 559         guid.Data1 = l; guid.Data2 = w1; guid.Data3 = w2;               \
 560         guid.Data4[0] = b1; guid.Data4[1] = b2; guid.Data4[2] = b3;     \
 561         guid.Data4[3] = b4; guid.Data4[4] = b5; guid.Data4[5] = b6;     \
 562         guid.Data4[6] = b7; guid.Data4[7] = b8;
 563
 564 /***********************************************************************
 565  *           DllMain (DSOUND.init)
 566  */
 567 BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpvReserved)
 568 {
 569     int i;
 570     TRACE("(%p %d %p)\n", hInstDLL, fdwReason, lpvReserved);
 571
 572     switch (fdwReason) {
 573     case DLL_PROCESS_ATTACH:
 574         TRACE("DLL_PROCESS_ATTACH\n");
 575         for (i = 0; i < MAXWAVEDRIVERS; i++) {
 576             DSOUND_renderer[i] = NULL;
 577             DSOUND_capture[i] = NULL;
 578             INIT_GUID(DSOUND_renderer_guids[i], 0xbd6dd71a, 0x3deb, 0x11d1, 0xb1, 0x71, 0x00, 0xc0, 0x4f, 0xc2, 0x00, 0x00 + i);
 579             INIT_GUID(DSOUND_capture_guids[i],  0xbd6dd71b, 0x3deb, 0x11d1, 0xb1, 0x71, 0x00, 0xc0, 0x4f, 0xc2, 0x00, 0x00 + i);
 580         }
 581         break;
 582     case DLL_PROCESS_DETACH:
 583         TRACE("DLL_PROCESS_DETACH\n");
 584         break;
 585     case DLL_THREAD_ATTACH:
 586         TRACE("DLL_THREAD_ATTACH\n");
 587         break;
 588     case DLL_THREAD_DETACH:
 589         TRACE("DLL_THREAD_DETACH\n");
 590         break;
 591     default:
 592         TRACE("UNKNOWN REASON\n");
 593         break;
 594     }
 595     return TRUE;
 596 }