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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 2 /* 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  2 /* 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 10 /* max number of fragments to prebuffer */
  70
  71 DirectSoundDevice*      DSOUND_renderer[MAXWAVEDRIVERS];
  72 GUID                    DSOUND_renderer_guids[MAXWAVEDRIVERS];
  73 GUID                    DSOUND_capture_guids[MAXWAVEDRIVERS];
  74
  75 HRESULT mmErr(UINT err)
  76 {
  77         switch(err) {
  78         case MMSYSERR_NOERROR:
  79                 return DS_OK;
  80         case MMSYSERR_ALLOCATED:
  81                 return DSERR_ALLOCATED;
  82         case MMSYSERR_ERROR:
  83         case MMSYSERR_INVALHANDLE:
  84         case WAVERR_STILLPLAYING:
  85                 return DSERR_GENERIC; /* FIXME */
  86         case MMSYSERR_NODRIVER:
  87                 return DSERR_NODRIVER;
  88         case MMSYSERR_NOMEM:
  89                 return DSERR_OUTOFMEMORY;
  90         case MMSYSERR_INVALPARAM:
  91         case WAVERR_BADFORMAT:
  92         case WAVERR_UNPREPARED:
  93                 return DSERR_INVALIDPARAM;
  94         case MMSYSERR_NOTSUPPORTED:
  95                 return DSERR_UNSUPPORTED;
  96         default:
  97                 FIXME("Unknown MMSYS error %d\n",err);
  98                 return DSERR_GENERIC;
  99         }
 100 }
 101
 102 int ds_emuldriver = DS_EMULDRIVER;
 103 int ds_hel_margin = DS_HEL_MARGIN;
 104 int ds_hel_queue = DS_HEL_QUEUE;
 105 int ds_snd_queue_max = DS_SND_QUEUE_MAX;
 106 int ds_hw_accel = DS_HW_ACCEL_FULL;
 107 int ds_default_playback = 0;
 108 int ds_default_capture = 0;
 109 int ds_default_sample_rate = 22050;
 110 int ds_default_bits_per_sample = 8;
 111
 112 /*
 113  * Get a config key from either the app-specific or the default config
 114  */
 115
 116 static inline DWORD get_config_key( HKEY defkey, HKEY appkey, const char *name,
 117                                     char *buffer, DWORD size )
 118 {
 119     if (appkey && !RegQueryValueExA( appkey, name, 0, NULL, (LPBYTE)buffer, &size )) return 0;
 120     if (defkey && !RegQueryValueExA( defkey, name, 0, NULL, (LPBYTE)buffer, &size )) return 0;
 121     return ERROR_FILE_NOT_FOUND;
 122 }
 123
 124
 125 /*
 126  * Setup the dsound options.
 127  */
 128
 129 void setup_dsound_options(void)
 130 {
 131     char buffer[MAX_PATH+16];
 132     HKEY hkey, appkey = 0;
 133     DWORD len;
 134
 135     buffer[MAX_PATH]='\0';
 136
 137     /* @@ Wine registry key: HKCU\Software\Wine\DirectSound */
 138     if (RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\DirectSound", &hkey )) hkey = 0;
 139
 140     len = GetModuleFileNameA( 0, buffer, MAX_PATH );
 141     if (len && len < MAX_PATH)
 142     {
 143         HKEY tmpkey;
 144         /* @@ Wine registry key: HKCU\Software\Wine\AppDefaults\app.exe\DirectSound */
 145         if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\AppDefaults", &tmpkey ))
 146         {
 147             char *p, *appname = buffer;
 148             if ((p = strrchr( appname, '/' ))) appname = p + 1;
 149             if ((p = strrchr( appname, '\\' ))) appname = p + 1;
 150             strcat( appname, "\\DirectSound" );
 151             TRACE("appname = [%s]\n", appname);
 152             if (RegOpenKeyA( tmpkey, appname, &appkey )) appkey = 0;
 153             RegCloseKey( tmpkey );
 154         }
 155     }
 156
 157     /* get options */
 158
 159     if (!get_config_key( hkey, appkey, "EmulDriver", buffer, MAX_PATH ))
 160         ds_emuldriver = strcmp(buffer, "N");
 161
 162     if (!get_config_key( hkey, appkey, "HELmargin", buffer, MAX_PATH ))
 163         ds_hel_margin = atoi(buffer);
 164
 165     if (!get_config_key( hkey, appkey, "HELqueue", buffer, MAX_PATH ))
 166         ds_hel_queue = atoi(buffer);
 167
 168     if (!get_config_key( hkey, appkey, "SndQueueMax", buffer, MAX_PATH ))
 169         ds_snd_queue_max = atoi(buffer);
 170
 171     if (!get_config_key( hkey, appkey, "HardwareAcceleration", buffer, MAX_PATH )) {
 172         if (strcmp(buffer, "Full") == 0)
 173             ds_hw_accel = DS_HW_ACCEL_FULL;
 174         else if (strcmp(buffer, "Standard") == 0)
 175             ds_hw_accel = DS_HW_ACCEL_STANDARD;
 176         else if (strcmp(buffer, "Basic") == 0)
 177             ds_hw_accel = DS_HW_ACCEL_BASIC;
 178         else if (strcmp(buffer, "Emulation") == 0)
 179             ds_hw_accel = DS_HW_ACCEL_EMULATION;
 180     }
 181
 182     if (!get_config_key( hkey, appkey, "DefaultPlayback", buffer, MAX_PATH ))
 183             ds_default_playback = atoi(buffer);
 184
 185     if (!get_config_key( hkey, appkey, "DefaultCapture", buffer, MAX_PATH ))
 186             ds_default_capture = atoi(buffer);
 187
 188     if (!get_config_key( hkey, appkey, "DefaultSampleRate", buffer, MAX_PATH ))
 189             ds_default_sample_rate = atoi(buffer);
 190
 191     if (!get_config_key( hkey, appkey, "DefaultBitsPerSample", buffer, MAX_PATH ))
 192             ds_default_bits_per_sample = atoi(buffer);
 193
 194     if (appkey) RegCloseKey( appkey );
 195     if (hkey) RegCloseKey( hkey );
 196
 197     if (ds_emuldriver != DS_EMULDRIVER )
 198        WARN("ds_emuldriver = %d (default=%d)\n",ds_emuldriver, DS_EMULDRIVER);
 199     if (ds_hel_margin != DS_HEL_MARGIN )
 200        WARN("ds_hel_margin = %d (default=%d)\n",ds_hel_margin, DS_HEL_MARGIN );
 201     if (ds_hel_queue != DS_HEL_QUEUE )
 202        WARN("ds_hel_queue = %d (default=%d)\n",ds_hel_queue, DS_HEL_QUEUE );
 203     if (ds_snd_queue_max != DS_SND_QUEUE_MAX)
 204        WARN("ds_snd_queue_max = %d (default=%d)\n",ds_snd_queue_max ,DS_SND_QUEUE_MAX);
 205     if (ds_hw_accel != DS_HW_ACCEL_FULL)
 206         WARN("ds_hw_accel = %s (default=Full)\n",
 207             ds_hw_accel==DS_HW_ACCEL_FULL ? "Full" :
 208             ds_hw_accel==DS_HW_ACCEL_STANDARD ? "Standard" :
 209             ds_hw_accel==DS_HW_ACCEL_BASIC ? "Basic" :
 210             ds_hw_accel==DS_HW_ACCEL_EMULATION ? "Emulation" :
 211             "Unknown");
 212     if (ds_default_playback != 0)
 213         WARN("ds_default_playback = %d (default=0)\n",ds_default_playback);
 214     if (ds_default_capture != 0)
 215         WARN("ds_default_capture = %d (default=0)\n",ds_default_playback);
 216     if (ds_default_sample_rate != 22050)
 217         WARN("ds_default_sample_rate = %d (default=22050)\n",ds_default_sample_rate);
 218     if (ds_default_bits_per_sample != 8)
 219         WARN("ds_default_bits_per_sample = %d (default=8)\n",ds_default_bits_per_sample);
 220 }
 221
 222 static const char * get_device_id(LPCGUID pGuid)
 223 {
 224     if (IsEqualGUID(&DSDEVID_DefaultPlayback, pGuid))
 225         return "DSDEVID_DefaultPlayback";
 226     else if (IsEqualGUID(&DSDEVID_DefaultVoicePlayback, pGuid))
 227         return "DSDEVID_DefaultVoicePlayback";
 228     else if (IsEqualGUID(&DSDEVID_DefaultCapture, pGuid))
 229         return "DSDEVID_DefaultCapture";
 230     else if (IsEqualGUID(&DSDEVID_DefaultVoiceCapture, pGuid))
 231         return "DSDEVID_DefaultVoiceCapture";
 232     return debugstr_guid(pGuid);
 233 }
 234
 235 /***************************************************************************
 236  * GetDeviceID  [DSOUND.9]
 237  *
 238  * Retrieves unique identifier of default device specified
 239  *
 240  * PARAMS
 241  *    pGuidSrc  [I] Address of device GUID.
 242  *    pGuidDest [O] Address to receive unique device GUID.
 243  *
 244  * RETURNS
 245  *    Success: DS_OK
 246  *    Failure: DSERR_INVALIDPARAM
 247  *
 248  * NOTES
 249  *    pGuidSrc is a valid device GUID or DSDEVID_DefaultPlayback,
 250  *    DSDEVID_DefaultCapture, DSDEVID_DefaultVoicePlayback, or
 251  *    DSDEVID_DefaultVoiceCapture.
 252  *    Returns pGuidSrc if pGuidSrc is a valid device or the device
 253  *    GUID for the specified constants.
 254  */
 255 HRESULT WINAPI GetDeviceID(LPCGUID pGuidSrc, LPGUID pGuidDest)
 256 {
 257     TRACE("(%s,%p)\n", get_device_id(pGuidSrc),pGuidDest);
 258
 259     if ( pGuidSrc == NULL) {
 260         WARN("invalid parameter: pGuidSrc == NULL\n");
 261         return DSERR_INVALIDPARAM;
 262     }
 263
 264     if ( pGuidDest == NULL ) {
 265         WARN("invalid parameter: pGuidDest == NULL\n");
 266         return DSERR_INVALIDPARAM;
 267     }
 268
 269     if ( IsEqualGUID( &DSDEVID_DefaultPlayback, pGuidSrc ) ||
 270          IsEqualGUID( &DSDEVID_DefaultVoicePlayback, pGuidSrc ) ) {
 271         CopyMemory(pGuidDest, &DSOUND_renderer_guids[ds_default_playback], sizeof(GUID));
 272         TRACE("returns %s\n", get_device_id(pGuidDest));
 273         return DS_OK;
 274     }
 275
 276     if ( IsEqualGUID( &DSDEVID_DefaultCapture, pGuidSrc ) ||
 277          IsEqualGUID( &DSDEVID_DefaultVoiceCapture, pGuidSrc ) ) {
 278         CopyMemory(pGuidDest, &DSOUND_capture_guids[ds_default_capture], sizeof(GUID));
 279         TRACE("returns %s\n", get_device_id(pGuidDest));
 280         return DS_OK;
 281     }
 282
 283     CopyMemory(pGuidDest, pGuidSrc, sizeof(GUID));
 284     TRACE("returns %s\n", get_device_id(pGuidDest));
 285
 286     return DS_OK;
 287 }
 288
 289
 290 /***************************************************************************
 291  * DirectSoundEnumerateA [DSOUND.2]
 292  *
 293  * Enumerate all DirectSound drivers installed in the system
 294  *
 295  * PARAMS
 296  *    lpDSEnumCallback  [I] Address of callback function.
 297  *    lpContext         [I] Address of user defined context passed to callback function.
 298  *
 299  * RETURNS
 300  *    Success: DS_OK
 301  *    Failure: DSERR_INVALIDPARAM
 302  */
 303 HRESULT WINAPI DirectSoundEnumerateA(
 304     LPDSENUMCALLBACKA lpDSEnumCallback,
 305     LPVOID lpContext)
 306 {
 307     unsigned devs, wod;
 308     DSDRIVERDESC desc;
 309     GUID guid;
 310     int err;
 311
 312     TRACE("lpDSEnumCallback = %p, lpContext = %p\n",
 313         lpDSEnumCallback, lpContext);
 314
 315     if (lpDSEnumCallback == NULL) {
 316         WARN("invalid parameter: lpDSEnumCallback == NULL\n");
 317         return DSERR_INVALIDPARAM;
 318     }
 319
 320     devs = waveOutGetNumDevs();
 321     if (devs > 0) {
 322         if (GetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) {
 323             for (wod = 0; wod < devs; ++wod) {
 324                 if (IsEqualGUID( &guid, &DSOUND_renderer_guids[wod]) ) {
 325                     err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 326                     if (err == DS_OK) {
 327                         TRACE("calling lpDSEnumCallback(NULL,\"%s\",\"%s\",%p)\n",
 328                               "Primary Sound Driver",desc.szDrvname,lpContext);
 329                         if (lpDSEnumCallback(NULL, "Primary Sound Driver", desc.szDrvname, lpContext) == FALSE)
 330                             return DS_OK;
 331                     }
 332                 }
 333             }
 334         }
 335     }
 336
 337     for (wod = 0; wod < devs; ++wod) {
 338         err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 339         if (err == DS_OK) {
 340             TRACE("calling lpDSEnumCallback(%s,\"%s\",\"%s\",%p)\n",
 341                   debugstr_guid(&DSOUND_renderer_guids[wod]),desc.szDesc,desc.szDrvname,lpContext);
 342             if (lpDSEnumCallback(&DSOUND_renderer_guids[wod], desc.szDesc, desc.szDrvname, lpContext) == FALSE)
 343                 return DS_OK;
 344         }
 345     }
 346     return DS_OK;
 347 }
 348
 349 /***************************************************************************
 350  * DirectSoundEnumerateW [DSOUND.3]
 351  *
 352  * Enumerate all DirectSound drivers installed in the system
 353  *
 354  * PARAMS
 355  *    lpDSEnumCallback  [I] Address of callback function.
 356  *    lpContext         [I] Address of user defined context passed to callback function.
 357  *
 358  * RETURNS
 359  *    Success: DS_OK
 360  *    Failure: DSERR_INVALIDPARAM
 361  */
 362 HRESULT WINAPI DirectSoundEnumerateW(
 363         LPDSENUMCALLBACKW lpDSEnumCallback,
 364         LPVOID lpContext )
 365 {
 366     unsigned devs, wod;
 367     DSDRIVERDESC desc;
 368     GUID guid;
 369     int err;
 370     WCHAR wDesc[MAXPNAMELEN];
 371     WCHAR wName[MAXPNAMELEN];
 372
 373     TRACE("lpDSEnumCallback = %p, lpContext = %p\n",
 374         lpDSEnumCallback, lpContext);
 375
 376     if (lpDSEnumCallback == NULL) {
 377         WARN("invalid parameter: lpDSEnumCallback == NULL\n");
 378         return DSERR_INVALIDPARAM;
 379     }
 380
 381     devs = waveOutGetNumDevs();
 382     if (devs > 0) {
 383         if (GetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) {
 384             for (wod = 0; wod < devs; ++wod) {
 385                 if (IsEqualGUID( &guid, &DSOUND_renderer_guids[wod] ) ) {
 386                     err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 387                     if (err == DS_OK) {
 388                         TRACE("calling lpDSEnumCallback(NULL,\"%s\",\"%s\",%p)\n",
 389                               "Primary Sound Driver",desc.szDrvname,lpContext);
 390                         MultiByteToWideChar( CP_ACP, 0, "Primary Sound Driver", -1,
 391                                              wDesc, sizeof(wDesc)/sizeof(WCHAR) );
 392                         MultiByteToWideChar( CP_ACP, 0, desc.szDrvname, -1,
 393                                              wName, sizeof(wName)/sizeof(WCHAR) );
 394                         if (lpDSEnumCallback(NULL, wDesc, wName, lpContext) == FALSE)
 395                             return DS_OK;
 396                     }
 397                 }
 398             }
 399         }
 400     }
 401
 402     for (wod = 0; wod < devs; ++wod) {
 403         err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 404         if (err == DS_OK) {
 405             TRACE("calling lpDSEnumCallback(%s,\"%s\",\"%s\",%p)\n",
 406                   debugstr_guid(&DSOUND_renderer_guids[wod]),desc.szDesc,desc.szDrvname,lpContext);
 407             MultiByteToWideChar( CP_ACP, 0, desc.szDesc, -1,
 408                                  wDesc, sizeof(wDesc)/sizeof(WCHAR) );
 409             MultiByteToWideChar( CP_ACP, 0, desc.szDrvname, -1,
 410                                  wName, sizeof(wName)/sizeof(WCHAR) );
 411             if (lpDSEnumCallback(&DSOUND_renderer_guids[wod], wDesc, wName, lpContext) == FALSE)
 412                 return DS_OK;
 413         }
 414     }
 415     return DS_OK;
 416 }
 417
 418 /*******************************************************************************
 419  * DirectSound ClassFactory
 420  */
 421
 422 typedef  HRESULT (*FnCreateInstance)(REFIID riid, LPVOID *ppobj);
 423
 424 typedef struct {
 425     const IClassFactoryVtbl *lpVtbl;
 426     LONG ref;
 427     REFCLSID rclsid;
 428     FnCreateInstance pfnCreateInstance;
 429 } IClassFactoryImpl;
 430
 431 static HRESULT WINAPI
 432 DSCF_QueryInterface(LPCLASSFACTORY iface, REFIID riid, LPVOID *ppobj)
 433 {
 434     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 435     TRACE("(%p, %s, %p)\n", This, debugstr_guid(riid), ppobj);
 436     if (ppobj == NULL)
 437         return E_POINTER;
 438     if (IsEqualIID(riid, &IID_IUnknown) ||
 439         IsEqualIID(riid, &IID_IClassFactory))
 440     {
 441         *ppobj = iface;
 442         IUnknown_AddRef(iface);
 443         return S_OK;
 444     }
 445     *ppobj = NULL;
 446     return E_NOINTERFACE;
 447 }
 448
 449 static ULONG WINAPI DSCF_AddRef(LPCLASSFACTORY iface)
 450 {
 451     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 452     ULONG ref = InterlockedIncrement(&(This->ref));
 453     TRACE("(%p) ref was %d\n", This, ref - 1);
 454     return ref;
 455 }
 456
 457 static ULONG WINAPI DSCF_Release(LPCLASSFACTORY iface)
 458 {
 459     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 460     ULONG ref = InterlockedDecrement(&(This->ref));
 461     TRACE("(%p) ref was %d\n", This, ref + 1);
 462     /* static class, won't be freed */
 463     return ref;
 464 }
 465
 466 static HRESULT WINAPI DSCF_CreateInstance(
 467     LPCLASSFACTORY iface,
 468     LPUNKNOWN pOuter,
 469     REFIID riid,
 470     LPVOID *ppobj)
 471 {
 472     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 473     TRACE("(%p, %p, %s, %p)\n", This, pOuter, debugstr_guid(riid), ppobj);
 474
 475     if (pOuter)
 476         return CLASS_E_NOAGGREGATION;
 477
 478     if (ppobj == NULL) {
 479         WARN("invalid parameter\n");
 480         return DSERR_INVALIDPARAM;
 481     }
 482     *ppobj = NULL;
 483     return This->pfnCreateInstance(riid, ppobj);
 484 }
 485
 486 static HRESULT WINAPI DSCF_LockServer(LPCLASSFACTORY iface, BOOL dolock)
 487 {
 488     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 489     FIXME("(%p, %d) stub!\n", This, dolock);
 490     return S_OK;
 491 }
 492
 493 static const IClassFactoryVtbl DSCF_Vtbl = {
 494     DSCF_QueryInterface,
 495     DSCF_AddRef,
 496     DSCF_Release,
 497     DSCF_CreateInstance,
 498     DSCF_LockServer
 499 };
 500
 501 static IClassFactoryImpl DSOUND_CF[] = {
 502     { &DSCF_Vtbl, 1, &CLSID_DirectSound, (FnCreateInstance)DSOUND_Create },
 503     { &DSCF_Vtbl, 1, &CLSID_DirectSound8, (FnCreateInstance)DSOUND_Create8 },
 504     { &DSCF_Vtbl, 1, &CLSID_DirectSoundCapture, (FnCreateInstance)DSOUND_CaptureCreate },
 505     { &DSCF_Vtbl, 1, &CLSID_DirectSoundCapture8, (FnCreateInstance)DSOUND_CaptureCreate8 },
 506     { &DSCF_Vtbl, 1, &CLSID_DirectSoundFullDuplex, (FnCreateInstance)DSOUND_FullDuplexCreate },
 507     { &DSCF_Vtbl, 1, &CLSID_DirectSoundPrivate, (FnCreateInstance)IKsPrivatePropertySetImpl_Create },
 508     { NULL, 0, NULL, NULL }
 509 };
 510
 511 /*******************************************************************************
 512  * DllGetClassObject [DSOUND.@]
 513  * Retrieves class object from a DLL object
 514  *
 515  * NOTES
 516  *    Docs say returns STDAPI
 517  *
 518  * PARAMS
 519  *    rclsid [I] CLSID for the class object
 520  *    riid   [I] Reference to identifier of interface for class object
 521  *    ppv    [O] Address of variable to receive interface pointer for riid
 522  *
 523  * RETURNS
 524  *    Success: S_OK
 525  *    Failure: CLASS_E_CLASSNOTAVAILABLE, E_OUTOFMEMORY, E_INVALIDARG,
 526  *             E_UNEXPECTED
 527  */
 528 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 529 {
 530     int i = 0;
 531     TRACE("(%s, %s, %p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 532
 533     if (ppv == NULL) {
 534         WARN("invalid parameter\n");
 535         return E_INVALIDARG;
 536     }
 537
 538     *ppv = NULL;
 539
 540     if (!IsEqualIID(riid, &IID_IClassFactory) &&
 541         !IsEqualIID(riid, &IID_IUnknown)) {
 542         WARN("no interface for %s\n", debugstr_guid(riid));
 543         return E_NOINTERFACE;
 544     }
 545
 546     while (NULL != DSOUND_CF[i].rclsid) {
 547         if (IsEqualGUID(rclsid, DSOUND_CF[i].rclsid)) {
 548             DSCF_AddRef((IClassFactory*) &DSOUND_CF[i]);
 549             *ppv = &DSOUND_CF[i];
 550             return S_OK;
 551         }
 552         i++;
 553     }
 554
 555     WARN("(%s, %s, %p): no class found.\n", debugstr_guid(rclsid),
 556          debugstr_guid(riid), ppv);
 557     return CLASS_E_CLASSNOTAVAILABLE;
 558 }
 559
 560
 561 /*******************************************************************************
 562  * DllCanUnloadNow [DSOUND.4]
 563  * Determines whether the DLL is in use.
 564  *
 565  * RETURNS
 566  *    Success: S_OK
 567  *    Failure: S_FALSE
 568  */
 569 HRESULT WINAPI DllCanUnloadNow(void)
 570 {
 571     FIXME("(void): stub\n");
 572     return S_FALSE;
 573 }
 574
 575 #define INIT_GUID(guid, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8)      \
 576         guid.Data1 = l; guid.Data2 = w1; guid.Data3 = w2;               \
 577         guid.Data4[0] = b1; guid.Data4[1] = b2; guid.Data4[2] = b3;     \
 578         guid.Data4[3] = b4; guid.Data4[4] = b5; guid.Data4[5] = b6;     \
 579         guid.Data4[6] = b7; guid.Data4[7] = b8;
 580
 581 /***********************************************************************
 582  *           DllMain (DSOUND.init)
 583  */
 584 BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpvReserved)
 585 {
 586     int i;
 587     TRACE("(%p %d %p)\n", hInstDLL, fdwReason, lpvReserved);
 588
 589     switch (fdwReason) {
 590     case DLL_PROCESS_ATTACH:
 591         TRACE("DLL_PROCESS_ATTACH\n");
 592         for (i = 0; i < MAXWAVEDRIVERS; i++) {
 593             DSOUND_renderer[i] = NULL;
 594             DSOUND_capture[i] = NULL;
 595             INIT_GUID(DSOUND_renderer_guids[i], 0xbd6dd71a, 0x3deb, 0x11d1, 0xb1, 0x71, 0x00, 0xc0, 0x4f, 0xc2, 0x00, 0x00 + i);
 596             INIT_GUID(DSOUND_capture_guids[i],  0xbd6dd71b, 0x3deb, 0x11d1, 0xb1, 0x71, 0x00, 0xc0, 0x4f, 0xc2, 0x00, 0x00 + i);
 597         }
 598         break;
 599     case DLL_PROCESS_DETACH:
 600         TRACE("DLL_PROCESS_DETACH\n");
 601         break;
 602     case DLL_THREAD_ATTACH:
 603         TRACE("DLL_THREAD_ATTACH\n");
 604         break;
 605     case DLL_THREAD_DETACH:
 606         TRACE("DLL_THREAD_DETACH\n");
 607         break;
 608     default:
 609         TRACE("UNKNOWN REASON\n");
 610         break;
 611     }
 612     return TRUE;
 613 }