dlls/dsound/dsound_main.c

   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 "initguid.h"
  52 #include "dsdriver.h"
  53 #include "dsound_private.h"
  54
  55 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
  56
  57 #define DS_HEL_BUFLEN 0x8000 /* HEL: The buffer length of the emulated buffer */
  58 #define DS_SND_QUEUE_MAX 10 /* max number of fragments to prebuffer, each fragment is approximately 10 ms long */
  59 #define DS_SND_QUEUE_MIN 6 /* If the minimum of prebuffered fragments go below this, forcibly take all locks to prevent underruns */
  60
  61 DirectSoundDevice*      DSOUND_renderer[MAXWAVEDRIVERS];
  62 GUID                    DSOUND_renderer_guids[MAXWAVEDRIVERS];
  63 GUID                    DSOUND_capture_guids[MAXWAVEDRIVERS];
  64
  65 HRESULT mmErr(UINT err)
  66 {
  67         switch(err) {
  68         case MMSYSERR_NOERROR:
  69                 return DS_OK;
  70         case MMSYSERR_ALLOCATED:
  71                 return DSERR_ALLOCATED;
  72         case MMSYSERR_ERROR:
  73         case MMSYSERR_INVALHANDLE:
  74         case WAVERR_STILLPLAYING:
  75                 return DSERR_GENERIC; /* FIXME */
  76         case MMSYSERR_NODRIVER:
  77                 return DSERR_NODRIVER;
  78         case MMSYSERR_NOMEM:
  79                 return DSERR_OUTOFMEMORY;
  80         case MMSYSERR_INVALPARAM:
  81         case WAVERR_BADFORMAT:
  82         case WAVERR_UNPREPARED:
  83                 return DSERR_INVALIDPARAM;
  84         case MMSYSERR_NOTSUPPORTED:
  85                 return DSERR_UNSUPPORTED;
  86         default:
  87                 FIXME("Unknown MMSYS error %d\n",err);
  88                 return DSERR_GENERIC;
  89         }
  90 }
  91
  92 int ds_emuldriver = 0;
  93 int ds_hel_buflen = DS_HEL_BUFLEN;
  94 int ds_snd_queue_max = DS_SND_QUEUE_MAX;
  95 int ds_snd_queue_min = DS_SND_QUEUE_MIN;
  96 int ds_hw_accel = DS_HW_ACCEL_FULL;
  97 int ds_default_playback = 0;
  98 int ds_default_capture = 0;
  99 int ds_default_sample_rate = 44100;
 100 int ds_default_bits_per_sample = 16;
 101
 102 /*
 103  * Get a config key from either the app-specific or the default config
 104  */
 105
 106 static inline DWORD get_config_key( HKEY defkey, HKEY appkey, const char *name,
 107                                     char *buffer, DWORD size )
 108 {
 109     if (appkey && !RegQueryValueExA( appkey, name, 0, NULL, (LPBYTE)buffer, &size )) return 0;
 110     if (defkey && !RegQueryValueExA( defkey, name, 0, NULL, (LPBYTE)buffer, &size )) return 0;
 111     return ERROR_FILE_NOT_FOUND;
 112 }
 113
 114
 115 /*
 116  * Setup the dsound options.
 117  */
 118
 119 void setup_dsound_options(void)
 120 {
 121     char buffer[MAX_PATH+16];
 122     HKEY hkey, appkey = 0;
 123     DWORD len;
 124
 125     buffer[MAX_PATH]='\0';
 126
 127     /* @@ Wine registry key: HKCU\Software\Wine\DirectSound */
 128     if (RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\DirectSound", &hkey )) hkey = 0;
 129
 130     len = GetModuleFileNameA( 0, buffer, MAX_PATH );
 131     if (len && len < MAX_PATH)
 132     {
 133         HKEY tmpkey;
 134         /* @@ Wine registry key: HKCU\Software\Wine\AppDefaults\app.exe\DirectSound */
 135         if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\AppDefaults", &tmpkey ))
 136         {
 137             char *p, *appname = buffer;
 138             if ((p = strrchr( appname, '/' ))) appname = p + 1;
 139             if ((p = strrchr( appname, '\\' ))) appname = p + 1;
 140             strcat( appname, "\\DirectSound" );
 141             TRACE("appname = [%s]\n", appname);
 142             if (RegOpenKeyA( tmpkey, appname, &appkey )) appkey = 0;
 143             RegCloseKey( tmpkey );
 144         }
 145     }
 146
 147     /* get options */
 148
 149     if (!get_config_key( hkey, appkey, "EmulDriver", buffer, MAX_PATH ))
 150         ds_emuldriver = strcmp(buffer, "N");
 151
 152     if (!get_config_key( hkey, appkey, "HelBuflen", buffer, MAX_PATH ))
 153         ds_hel_buflen = atoi(buffer);
 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, "SndQueueMin", buffer, MAX_PATH ))
 159         ds_snd_queue_min = atoi(buffer);
 160
 161     if (!get_config_key( hkey, appkey, "HardwareAcceleration", buffer, MAX_PATH )) {
 162         if (strcmp(buffer, "Full") == 0)
 163             ds_hw_accel = DS_HW_ACCEL_FULL;
 164         else if (strcmp(buffer, "Standard") == 0)
 165             ds_hw_accel = DS_HW_ACCEL_STANDARD;
 166         else if (strcmp(buffer, "Basic") == 0)
 167             ds_hw_accel = DS_HW_ACCEL_BASIC;
 168         else if (strcmp(buffer, "Emulation") == 0)
 169             ds_hw_accel = DS_HW_ACCEL_EMULATION;
 170     }
 171
 172     if (!get_config_key( hkey, appkey, "DefaultPlayback", buffer, MAX_PATH ))
 173             ds_default_playback = atoi(buffer);
 174
 175     if (!get_config_key( hkey, appkey, "DefaultCapture", buffer, MAX_PATH ))
 176             ds_default_capture = atoi(buffer);
 177
 178     if (!get_config_key( hkey, appkey, "DefaultSampleRate", buffer, MAX_PATH ))
 179             ds_default_sample_rate = atoi(buffer);
 180
 181     if (!get_config_key( hkey, appkey, "DefaultBitsPerSample", buffer, MAX_PATH ))
 182             ds_default_bits_per_sample = atoi(buffer);
 183
 184     if (appkey) RegCloseKey( appkey );
 185     if (hkey) RegCloseKey( hkey );
 186
 187     if (ds_emuldriver)
 188        WARN("ds_emuldriver = %d (default=0)\n",ds_emuldriver);
 189     if (ds_hel_buflen != DS_HEL_BUFLEN)
 190        WARN("ds_hel_buflen = %d (default=%d)\n",ds_hel_buflen ,DS_HEL_BUFLEN);
 191     if (ds_snd_queue_max != DS_SND_QUEUE_MAX)
 192        WARN("ds_snd_queue_max = %d (default=%d)\n",ds_snd_queue_max ,DS_SND_QUEUE_MAX);
 193     if (ds_snd_queue_min != DS_SND_QUEUE_MIN)
 194        WARN("ds_snd_queue_min = %d (default=%d)\n",ds_snd_queue_min ,DS_SND_QUEUE_MIN);
 195     if (ds_hw_accel != DS_HW_ACCEL_FULL)
 196         WARN("ds_hw_accel = %s (default=Full)\n",
 197             ds_hw_accel==DS_HW_ACCEL_FULL ? "Full" :
 198             ds_hw_accel==DS_HW_ACCEL_STANDARD ? "Standard" :
 199             ds_hw_accel==DS_HW_ACCEL_BASIC ? "Basic" :
 200             ds_hw_accel==DS_HW_ACCEL_EMULATION ? "Emulation" :
 201             "Unknown");
 202     if (ds_default_playback != 0)
 203         WARN("ds_default_playback = %d (default=0)\n",ds_default_playback);
 204     if (ds_default_capture != 0)
 205         WARN("ds_default_capture = %d (default=0)\n",ds_default_playback);
 206     if (ds_default_sample_rate != 44100)
 207         WARN("ds_default_sample_rate = %d (default=44100)\n",ds_default_sample_rate);
 208     if (ds_default_bits_per_sample != 16)
 209         WARN("ds_default_bits_per_sample = %d (default=16)\n",ds_default_bits_per_sample);
 210 }
 211
 212 static const char * get_device_id(LPCGUID pGuid)
 213 {
 214     if (IsEqualGUID(&DSDEVID_DefaultPlayback, pGuid))
 215         return "DSDEVID_DefaultPlayback";
 216     else if (IsEqualGUID(&DSDEVID_DefaultVoicePlayback, pGuid))
 217         return "DSDEVID_DefaultVoicePlayback";
 218     else if (IsEqualGUID(&DSDEVID_DefaultCapture, pGuid))
 219         return "DSDEVID_DefaultCapture";
 220     else if (IsEqualGUID(&DSDEVID_DefaultVoiceCapture, pGuid))
 221         return "DSDEVID_DefaultVoiceCapture";
 222     return debugstr_guid(pGuid);
 223 }
 224
 225 /***************************************************************************
 226  * GetDeviceID  [DSOUND.9]
 227  *
 228  * Retrieves unique identifier of default device specified
 229  *
 230  * PARAMS
 231  *    pGuidSrc  [I] Address of device GUID.
 232  *    pGuidDest [O] Address to receive unique device GUID.
 233  *
 234  * RETURNS
 235  *    Success: DS_OK
 236  *    Failure: DSERR_INVALIDPARAM
 237  *
 238  * NOTES
 239  *    pGuidSrc is a valid device GUID or DSDEVID_DefaultPlayback,
 240  *    DSDEVID_DefaultCapture, DSDEVID_DefaultVoicePlayback, or
 241  *    DSDEVID_DefaultVoiceCapture.
 242  *    Returns pGuidSrc if pGuidSrc is a valid device or the device
 243  *    GUID for the specified constants.
 244  */
 245 HRESULT WINAPI GetDeviceID(LPCGUID pGuidSrc, LPGUID pGuidDest)
 246 {
 247     TRACE("(%s,%p)\n", get_device_id(pGuidSrc),pGuidDest);
 248
 249     if ( pGuidSrc == NULL) {
 250         WARN("invalid parameter: pGuidSrc == NULL\n");
 251         return DSERR_INVALIDPARAM;
 252     }
 253
 254     if ( pGuidDest == NULL ) {
 255         WARN("invalid parameter: pGuidDest == NULL\n");
 256         return DSERR_INVALIDPARAM;
 257     }
 258
 259     if ( IsEqualGUID( &DSDEVID_DefaultPlayback, pGuidSrc ) ||
 260          IsEqualGUID( &DSDEVID_DefaultVoicePlayback, pGuidSrc ) ) {
 261         CopyMemory(pGuidDest, &DSOUND_renderer_guids[ds_default_playback], sizeof(GUID));
 262         TRACE("returns %s\n", get_device_id(pGuidDest));
 263         return DS_OK;
 264     }
 265
 266     if ( IsEqualGUID( &DSDEVID_DefaultCapture, pGuidSrc ) ||
 267          IsEqualGUID( &DSDEVID_DefaultVoiceCapture, pGuidSrc ) ) {
 268         CopyMemory(pGuidDest, &DSOUND_capture_guids[ds_default_capture], sizeof(GUID));
 269         TRACE("returns %s\n", get_device_id(pGuidDest));
 270         return DS_OK;
 271     }
 272
 273     CopyMemory(pGuidDest, pGuidSrc, sizeof(GUID));
 274     TRACE("returns %s\n", get_device_id(pGuidDest));
 275
 276     return DS_OK;
 277 }
 278
 279
 280 /***************************************************************************
 281  * DirectSoundEnumerateA [DSOUND.2]
 282  *
 283  * Enumerate all DirectSound drivers installed in the system
 284  *
 285  * PARAMS
 286  *    lpDSEnumCallback  [I] Address of callback function.
 287  *    lpContext         [I] Address of user defined context passed to callback function.
 288  *
 289  * RETURNS
 290  *    Success: DS_OK
 291  *    Failure: DSERR_INVALIDPARAM
 292  */
 293 HRESULT WINAPI DirectSoundEnumerateA(
 294     LPDSENUMCALLBACKA lpDSEnumCallback,
 295     LPVOID lpContext)
 296 {
 297     unsigned devs, wod;
 298     DSDRIVERDESC desc;
 299     GUID guid;
 300     int err;
 301
 302     TRACE("lpDSEnumCallback = %p, lpContext = %p\n",
 303         lpDSEnumCallback, lpContext);
 304
 305     if (lpDSEnumCallback == NULL) {
 306         WARN("invalid parameter: lpDSEnumCallback == NULL\n");
 307         return DSERR_INVALIDPARAM;
 308     }
 309
 310     devs = waveOutGetNumDevs();
 311     if (devs > 0) {
 312         if (GetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) {
 313             for (wod = 0; wod < devs; ++wod) {
 314                 if (IsEqualGUID( &guid, &DSOUND_renderer_guids[wod]) ) {
 315                     err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 316                     if (err == DS_OK) {
 317                         TRACE("calling lpDSEnumCallback(NULL,\"%s\",\"%s\",%p)\n",
 318                               "Primary Sound Driver",desc.szDrvname,lpContext);
 319                         if (lpDSEnumCallback(NULL, "Primary Sound Driver", desc.szDrvname, lpContext) == FALSE)
 320                             return DS_OK;
 321                     }
 322                 }
 323             }
 324         }
 325     }
 326
 327     for (wod = 0; wod < devs; ++wod) {
 328         err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 329         if (err == DS_OK) {
 330             TRACE("calling lpDSEnumCallback(%s,\"%s\",\"%s\",%p)\n",
 331                   debugstr_guid(&DSOUND_renderer_guids[wod]),desc.szDesc,desc.szDrvname,lpContext);
 332             if (lpDSEnumCallback(&DSOUND_renderer_guids[wod], desc.szDesc, desc.szDrvname, lpContext) == FALSE)
 333                 return DS_OK;
 334         }
 335     }
 336     return DS_OK;
 337 }
 338
 339 /***************************************************************************
 340  * DirectSoundEnumerateW [DSOUND.3]
 341  *
 342  * Enumerate all DirectSound drivers installed in the system
 343  *
 344  * PARAMS
 345  *    lpDSEnumCallback  [I] Address of callback function.
 346  *    lpContext         [I] Address of user defined context passed to callback function.
 347  *
 348  * RETURNS
 349  *    Success: DS_OK
 350  *    Failure: DSERR_INVALIDPARAM
 351  */
 352 HRESULT WINAPI DirectSoundEnumerateW(
 353         LPDSENUMCALLBACKW lpDSEnumCallback,
 354         LPVOID lpContext )
 355 {
 356     unsigned devs, wod;
 357     DSDRIVERDESC desc;
 358     GUID guid;
 359     int err;
 360     WCHAR wDesc[MAXPNAMELEN];
 361     WCHAR wName[MAXPNAMELEN];
 362
 363     TRACE("lpDSEnumCallback = %p, lpContext = %p\n",
 364         lpDSEnumCallback, lpContext);
 365
 366     if (lpDSEnumCallback == NULL) {
 367         WARN("invalid parameter: lpDSEnumCallback == NULL\n");
 368         return DSERR_INVALIDPARAM;
 369     }
 370
 371     devs = waveOutGetNumDevs();
 372     if (devs > 0) {
 373         if (GetDeviceID(&DSDEVID_DefaultPlayback, &guid) == DS_OK) {
 374             for (wod = 0; wod < devs; ++wod) {
 375                 if (IsEqualGUID( &guid, &DSOUND_renderer_guids[wod] ) ) {
 376                     err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 377                     if (err == DS_OK) {
 378                         TRACE("calling lpDSEnumCallback(NULL,\"%s\",\"%s\",%p)\n",
 379                               "Primary Sound Driver",desc.szDrvname,lpContext);
 380                         MultiByteToWideChar( CP_ACP, 0, "Primary Sound Driver", -1,
 381                                              wDesc, sizeof(wDesc)/sizeof(WCHAR) );
 382                         MultiByteToWideChar( CP_ACP, 0, desc.szDrvname, -1,
 383                                              wName, sizeof(wName)/sizeof(WCHAR) );
 384                         if (lpDSEnumCallback(NULL, wDesc, wName, lpContext) == FALSE)
 385                             return DS_OK;
 386                     }
 387                 }
 388             }
 389         }
 390     }
 391
 392     for (wod = 0; wod < devs; ++wod) {
 393         err = mmErr(waveOutMessage((HWAVEOUT)wod,DRV_QUERYDSOUNDDESC,(DWORD_PTR)&desc,0));
 394         if (err == DS_OK) {
 395             TRACE("calling lpDSEnumCallback(%s,\"%s\",\"%s\",%p)\n",
 396                   debugstr_guid(&DSOUND_renderer_guids[wod]),desc.szDesc,desc.szDrvname,lpContext);
 397             MultiByteToWideChar( CP_ACP, 0, desc.szDesc, -1,
 398                                  wDesc, sizeof(wDesc)/sizeof(WCHAR) );
 399             MultiByteToWideChar( CP_ACP, 0, desc.szDrvname, -1,
 400                                  wName, sizeof(wName)/sizeof(WCHAR) );
 401             if (lpDSEnumCallback(&DSOUND_renderer_guids[wod], wDesc, wName, lpContext) == FALSE)
 402                 return DS_OK;
 403         }
 404     }
 405     return DS_OK;
 406 }
 407
 408 /*******************************************************************************
 409  * DirectSound ClassFactory
 410  */
 411
 412 typedef  HRESULT (*FnCreateInstance)(REFIID riid, LPVOID *ppobj);
 413
 414 typedef struct {
 415     const IClassFactoryVtbl *lpVtbl;
 416     LONG ref;
 417     REFCLSID rclsid;
 418     FnCreateInstance pfnCreateInstance;
 419 } IClassFactoryImpl;
 420
 421 static HRESULT WINAPI
 422 DSCF_QueryInterface(LPCLASSFACTORY iface, REFIID riid, LPVOID *ppobj)
 423 {
 424     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 425     TRACE("(%p, %s, %p)\n", This, debugstr_guid(riid), ppobj);
 426     if (ppobj == NULL)
 427         return E_POINTER;
 428     if (IsEqualIID(riid, &IID_IUnknown) ||
 429         IsEqualIID(riid, &IID_IClassFactory))
 430     {
 431         *ppobj = iface;
 432         IUnknown_AddRef(iface);
 433         return S_OK;
 434     }
 435     *ppobj = NULL;
 436     return E_NOINTERFACE;
 437 }
 438
 439 static ULONG WINAPI DSCF_AddRef(LPCLASSFACTORY iface)
 440 {
 441     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 442     ULONG ref = InterlockedIncrement(&(This->ref));
 443     TRACE("(%p) ref was %d\n", This, ref - 1);
 444     return ref;
 445 }
 446
 447 static ULONG WINAPI DSCF_Release(LPCLASSFACTORY iface)
 448 {
 449     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 450     ULONG ref = InterlockedDecrement(&(This->ref));
 451     TRACE("(%p) ref was %d\n", This, ref + 1);
 452     /* static class, won't be freed */
 453     return ref;
 454 }
 455
 456 static HRESULT WINAPI DSCF_CreateInstance(
 457     LPCLASSFACTORY iface,
 458     LPUNKNOWN pOuter,
 459     REFIID riid,
 460     LPVOID *ppobj)
 461 {
 462     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 463     TRACE("(%p, %p, %s, %p)\n", This, pOuter, debugstr_guid(riid), ppobj);
 464
 465     if (pOuter)
 466         return CLASS_E_NOAGGREGATION;
 467
 468     if (ppobj == NULL) {
 469         WARN("invalid parameter\n");
 470         return DSERR_INVALIDPARAM;
 471     }
 472     *ppobj = NULL;
 473     return This->pfnCreateInstance(riid, ppobj);
 474 }
 475
 476 static HRESULT WINAPI DSCF_LockServer(LPCLASSFACTORY iface, BOOL dolock)
 477 {
 478     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 479     FIXME("(%p, %d) stub!\n", This, dolock);
 480     return S_OK;
 481 }
 482
 483 static const IClassFactoryVtbl DSCF_Vtbl = {
 484     DSCF_QueryInterface,
 485     DSCF_AddRef,
 486     DSCF_Release,
 487     DSCF_CreateInstance,
 488     DSCF_LockServer
 489 };
 490
 491 static IClassFactoryImpl DSOUND_CF[] = {
 492     { &DSCF_Vtbl, 1, &CLSID_DirectSound, (FnCreateInstance)DSOUND_Create },
 493     { &DSCF_Vtbl, 1, &CLSID_DirectSound8, (FnCreateInstance)DSOUND_Create8 },
 494     { &DSCF_Vtbl, 1, &CLSID_DirectSoundCapture, (FnCreateInstance)DSOUND_CaptureCreate },
 495     { &DSCF_Vtbl, 1, &CLSID_DirectSoundCapture8, (FnCreateInstance)DSOUND_CaptureCreate8 },
 496     { &DSCF_Vtbl, 1, &CLSID_DirectSoundFullDuplex, (FnCreateInstance)DSOUND_FullDuplexCreate },
 497     { &DSCF_Vtbl, 1, &CLSID_DirectSoundPrivate, (FnCreateInstance)IKsPrivatePropertySetImpl_Create },
 498     { NULL, 0, NULL, NULL }
 499 };
 500
 501 /*******************************************************************************
 502  * DllGetClassObject [DSOUND.@]
 503  * Retrieves class object from a DLL object
 504  *
 505  * NOTES
 506  *    Docs say returns STDAPI
 507  *
 508  * PARAMS
 509  *    rclsid [I] CLSID for the class object
 510  *    riid   [I] Reference to identifier of interface for class object
 511  *    ppv    [O] Address of variable to receive interface pointer for riid
 512  *
 513  * RETURNS
 514  *    Success: S_OK
 515  *    Failure: CLASS_E_CLASSNOTAVAILABLE, E_OUTOFMEMORY, E_INVALIDARG,
 516  *             E_UNEXPECTED
 517  */
 518 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 519 {
 520     int i = 0;
 521     TRACE("(%s, %s, %p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 522
 523     if (ppv == NULL) {
 524         WARN("invalid parameter\n");
 525         return E_INVALIDARG;
 526     }
 527
 528     *ppv = NULL;
 529
 530     if (!IsEqualIID(riid, &IID_IClassFactory) &&
 531         !IsEqualIID(riid, &IID_IUnknown)) {
 532         WARN("no interface for %s\n", debugstr_guid(riid));
 533         return E_NOINTERFACE;
 534     }
 535
 536     while (NULL != DSOUND_CF[i].rclsid) {
 537         if (IsEqualGUID(rclsid, DSOUND_CF[i].rclsid)) {
 538             DSCF_AddRef((IClassFactory*) &DSOUND_CF[i]);
 539             *ppv = &DSOUND_CF[i];
 540             return S_OK;
 541         }
 542         i++;
 543     }
 544
 545     WARN("(%s, %s, %p): no class found.\n", debugstr_guid(rclsid),
 546          debugstr_guid(riid), ppv);
 547     return CLASS_E_CLASSNOTAVAILABLE;
 548 }
 549
 550
 551 /*******************************************************************************
 552  * DllCanUnloadNow [DSOUND.4]
 553  * Determines whether the DLL is in use.
 554  *
 555  * RETURNS
 556  *    Success: S_OK
 557  *    Failure: S_FALSE
 558  */
 559 HRESULT WINAPI DllCanUnloadNow(void)
 560 {
 561     FIXME("(void): stub\n");
 562     return S_FALSE;
 563 }
 564
 565 #define INIT_GUID(guid, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8)      \
 566         guid.Data1 = l; guid.Data2 = w1; guid.Data3 = w2;               \
 567         guid.Data4[0] = b1; guid.Data4[1] = b2; guid.Data4[2] = b3;     \
 568         guid.Data4[3] = b4; guid.Data4[4] = b5; guid.Data4[5] = b6;     \
 569         guid.Data4[6] = b7; guid.Data4[7] = b8;
 570
 571 /***********************************************************************
 572  *           DllMain (DSOUND.init)
 573  */
 574 BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpvReserved)
 575 {
 576     int i;
 577     TRACE("(%p %d %p)\n", hInstDLL, fdwReason, lpvReserved);
 578
 579     switch (fdwReason) {
 580     case DLL_PROCESS_ATTACH:
 581         TRACE("DLL_PROCESS_ATTACH\n");
 582         for (i = 0; i < MAXWAVEDRIVERS; i++) {
 583             DSOUND_renderer[i] = NULL;
 584             DSOUND_capture[i] = NULL;
 585             INIT_GUID(DSOUND_renderer_guids[i], 0xbd6dd71a, 0x3deb, 0x11d1, 0xb1, 0x71, 0x00, 0xc0, 0x4f, 0xc2, 0x00, 0x00 + i);
 586             INIT_GUID(DSOUND_capture_guids[i],  0xbd6dd71b, 0x3deb, 0x11d1, 0xb1, 0x71, 0x00, 0xc0, 0x4f, 0xc2, 0x00, 0x00 + i);
 587         }
 588         DisableThreadLibraryCalls(hInstDLL);
 589         /* Increase refcount on dsound by 1 */
 590         GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS, (LPCWSTR)hInstDLL, &hInstDLL);
 591         break;
 592     case DLL_PROCESS_DETACH:
 593         TRACE("DLL_PROCESS_DETACH\n");
 594         break;
 595     default:
 596         TRACE("UNKNOWN REASON\n");
 597         break;
 598     }
 599     return TRUE;
 600 }