git.oblomov.eu Git - wine/blob - dlls/mmdevapi/devenum.c

   1 /*
   2  * Copyright 2009 Maarten Lankhorst
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "config.h"
  20
  21 #include <stdarg.h>
  22
  23 #define NONAMELESSUNION
  24 #define COBJMACROS
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "winnls.h"
  28 #include "winreg.h"
  29 #include "wine/debug.h"
  30 #include "wine/unicode.h"
  31
  32 #include "ole2.h"
  33 #include "mmdeviceapi.h"
  34 #include "dshow.h"
  35 #include "dsound.h"
  36 #include "audioclient.h"
  37 #include "endpointvolume.h"
  38 #include "audiopolicy.h"
  39
  40 #include "mmdevapi.h"
  41 #include "devpkey.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(mmdevapi);
  44
  45 static const WCHAR software_mmdevapi[] =
  46     { 'S','o','f','t','w','a','r','e','\\',
  47       'M','i','c','r','o','s','o','f','t','\\',
  48       'W','i','n','d','o','w','s','\\',
  49       'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
  50       'M','M','D','e','v','i','c','e','s','\\',
  51       'A','u','d','i','o',0};
  52 static const WCHAR reg_render[] =
  53     { 'R','e','n','d','e','r',0 };
  54 static const WCHAR reg_capture[] =
  55     { 'C','a','p','t','u','r','e',0 };
  56 static const WCHAR reg_devicestate[] =
  57     { 'D','e','v','i','c','e','S','t','a','t','e',0 };
  58 static const WCHAR reg_properties[] =
  59     { 'P','r','o','p','e','r','t','i','e','s',0 };
  60
  61 static HKEY key_render;
  62 static HKEY key_capture;
  63
  64 typedef struct MMDevPropStoreImpl
  65 {
  66     IPropertyStore IPropertyStore_iface;
  67     LONG ref;
  68     MMDevice *parent;
  69     DWORD access;
  70 } MMDevPropStore;
  71
  72 typedef struct MMDevEnumImpl
  73 {
  74     IMMDeviceEnumerator IMMDeviceEnumerator_iface;
  75     LONG ref;
  76 } MMDevEnumImpl;
  77
  78 static MMDevEnumImpl *MMDevEnumerator;
  79 static MMDevice **MMDevice_head;
  80 static MMDevice *MMDevice_def_rec, *MMDevice_def_play;
  81 static DWORD MMDevice_count;
  82 static const IMMDeviceEnumeratorVtbl MMDevEnumVtbl;
  83 static const IMMDeviceCollectionVtbl MMDevColVtbl;
  84 static const IMMDeviceVtbl MMDeviceVtbl;
  85 static const IPropertyStoreVtbl MMDevPropVtbl;
  86 static const IMMEndpointVtbl MMEndpointVtbl;
  87
  88 typedef struct MMDevColImpl
  89 {
  90     IMMDeviceCollection IMMDeviceCollection_iface;
  91     LONG ref;
  92     EDataFlow flow;
  93     DWORD state;
  94 } MMDevColImpl;
  95
  96 typedef struct IPropertyBagImpl {
  97     IPropertyBag IPropertyBag_iface;
  98     GUID devguid;
  99 } IPropertyBagImpl;
 100
 101 static const IPropertyBagVtbl PB_Vtbl;
 102
 103 static HRESULT MMDevPropStore_Create(MMDevice *This, DWORD access, IPropertyStore **ppv);
 104
 105 static inline MMDevPropStore *impl_from_IPropertyStore(IPropertyStore *iface)
 106 {
 107     return CONTAINING_RECORD(iface, MMDevPropStore, IPropertyStore_iface);
 108 }
 109
 110 static inline MMDevEnumImpl *impl_from_IMMDeviceEnumerator(IMMDeviceEnumerator *iface)
 111 {
 112     return CONTAINING_RECORD(iface, MMDevEnumImpl, IMMDeviceEnumerator_iface);
 113 }
 114
 115 static inline MMDevColImpl *impl_from_IMMDeviceCollection(IMMDeviceCollection *iface)
 116 {
 117     return CONTAINING_RECORD(iface, MMDevColImpl, IMMDeviceCollection_iface);
 118 }
 119
 120 static inline IPropertyBagImpl *impl_from_IPropertyBag(IPropertyBag *iface)
 121 {
 122     return CONTAINING_RECORD(iface, IPropertyBagImpl, IPropertyBag_iface);
 123 }
 124
 125 static const WCHAR propkey_formatW[] = {
 126     '{','%','0','8','X','-','%','0','4','X','-',
 127     '%','0','4','X','-','%','0','2','X','%','0','2','X','-',
 128     '%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X',
 129     '%','0','2','X','%','0','2','X','}',',','%','d',0 };
 130
 131 static HRESULT MMDevPropStore_OpenPropKey(const GUID *guid, DWORD flow, HKEY *propkey)
 132 {
 133     WCHAR buffer[39];
 134     LONG ret;
 135     HKEY key;
 136     StringFromGUID2(guid, buffer, 39);
 137     if ((ret = RegOpenKeyExW(flow == eRender ? key_render : key_capture, buffer, 0, KEY_READ|KEY_WRITE, &key)) != ERROR_SUCCESS)
 138     {
 139         WARN("Opening key %s failed with %u\n", debugstr_w(buffer), ret);
 140         return E_FAIL;
 141     }
 142     ret = RegOpenKeyExW(key, reg_properties, 0, KEY_READ|KEY_WRITE, propkey);
 143     RegCloseKey(key);
 144     if (ret != ERROR_SUCCESS)
 145     {
 146         WARN("Opening key %s failed with %u\n", debugstr_w(reg_properties), ret);
 147         return E_FAIL;
 148     }
 149     return S_OK;
 150 }
 151
 152 HRESULT MMDevice_GetPropValue(const GUID *devguid, DWORD flow, REFPROPERTYKEY key, PROPVARIANT *pv)
 153 {
 154     WCHAR buffer[80];
 155     const GUID *id = &key->fmtid;
 156     DWORD type, size;
 157     HRESULT hr = S_OK;
 158     HKEY regkey;
 159     LONG ret;
 160
 161     hr = MMDevPropStore_OpenPropKey(devguid, flow, &regkey);
 162     if (FAILED(hr))
 163         return hr;
 164     wsprintfW( buffer, propkey_formatW, id->Data1, id->Data2, id->Data3,
 165                id->Data4[0], id->Data4[1], id->Data4[2], id->Data4[3],
 166                id->Data4[4], id->Data4[5], id->Data4[6], id->Data4[7], key->pid );
 167     ret = RegGetValueW(regkey, NULL, buffer, RRF_RT_ANY, &type, NULL, &size);
 168     if (ret != ERROR_SUCCESS)
 169     {
 170         WARN("Reading %s returned %d\n", debugstr_w(buffer), ret);
 171         RegCloseKey(regkey);
 172         PropVariantClear(pv);
 173         return S_OK;
 174     }
 175
 176     switch (type)
 177     {
 178         case REG_SZ:
 179         {
 180             pv->vt = VT_LPWSTR;
 181             pv->u.pwszVal = CoTaskMemAlloc(size);
 182             if (!pv->u.pwszVal)
 183                 hr = E_OUTOFMEMORY;
 184             else
 185                 RegGetValueW(regkey, NULL, buffer, RRF_RT_REG_SZ, NULL, (BYTE*)pv->u.pwszVal, &size);
 186             break;
 187         }
 188         case REG_DWORD:
 189         {
 190             pv->vt = VT_UI4;
 191             RegGetValueW(regkey, NULL, buffer, RRF_RT_REG_DWORD, NULL, (BYTE*)&pv->u.ulVal, &size);
 192             break;
 193         }
 194         case REG_BINARY:
 195         {
 196             pv->vt = VT_BLOB;
 197             pv->u.blob.cbSize = size;
 198             pv->u.blob.pBlobData = CoTaskMemAlloc(size);
 199             if (!pv->u.blob.pBlobData)
 200                 hr = E_OUTOFMEMORY;
 201             else
 202                 RegGetValueW(regkey, NULL, buffer, RRF_RT_REG_BINARY, NULL, (BYTE*)pv->u.blob.pBlobData, &size);
 203             break;
 204         }
 205         default:
 206             ERR("Unknown/unhandled type: %u\n", type);
 207             PropVariantClear(pv);
 208             break;
 209     }
 210     RegCloseKey(regkey);
 211     return hr;
 212 }
 213
 214 static HRESULT MMDevice_SetPropValue(const GUID *devguid, DWORD flow, REFPROPERTYKEY key, REFPROPVARIANT pv)
 215 {
 216     WCHAR buffer[80];
 217     const GUID *id = &key->fmtid;
 218     HRESULT hr;
 219     HKEY regkey;
 220     LONG ret;
 221
 222     hr = MMDevPropStore_OpenPropKey(devguid, flow, &regkey);
 223     if (FAILED(hr))
 224         return hr;
 225     wsprintfW( buffer, propkey_formatW, id->Data1, id->Data2, id->Data3,
 226                id->Data4[0], id->Data4[1], id->Data4[2], id->Data4[3],
 227                id->Data4[4], id->Data4[5], id->Data4[6], id->Data4[7], key->pid );
 228     switch (pv->vt)
 229     {
 230         case VT_UI4:
 231         {
 232             ret = RegSetValueExW(regkey, buffer, 0, REG_DWORD, (const BYTE*)&pv->u.ulVal, sizeof(DWORD));
 233             break;
 234         }
 235         case VT_BLOB:
 236         {
 237             ret = RegSetValueExW(regkey, buffer, 0, REG_BINARY, pv->u.blob.pBlobData, pv->u.blob.cbSize);
 238             TRACE("Blob %p %u\n", pv->u.blob.pBlobData, pv->u.blob.cbSize);
 239
 240             break;
 241         }
 242         case VT_LPWSTR:
 243         {
 244             ret = RegSetValueExW(regkey, buffer, 0, REG_SZ, (const BYTE*)pv->u.pwszVal, sizeof(WCHAR)*(1+lstrlenW(pv->u.pwszVal)));
 245             break;
 246         }
 247         default:
 248             ret = 0;
 249             FIXME("Unhandled type %u\n", pv->vt);
 250             hr = E_INVALIDARG;
 251             break;
 252     }
 253     RegCloseKey(regkey);
 254     TRACE("Writing %s returned %u\n", debugstr_w(buffer), ret);
 255     return hr;
 256 }
 257
 258 /* Creates or updates the state of a device
 259  * If GUID is null, a random guid will be assigned
 260  * and the device will be created
 261  */
 262 static MMDevice *MMDevice_Create(WCHAR *name, void *devkey, GUID *id, EDataFlow flow, DWORD state, BOOL setdefault)
 263 {
 264     HKEY key, root;
 265     MMDevice *cur;
 266     WCHAR guidstr[39];
 267     DWORD i;
 268
 269     for (i = 0; i < MMDevice_count; ++i)
 270     {
 271         cur = MMDevice_head[i];
 272         if (cur->flow == flow && !lstrcmpW(cur->drv_id, name))
 273         {
 274             LONG ret;
 275             /* Same device, update state */
 276             cur->state = state;
 277             cur->key = devkey;
 278             StringFromGUID2(&cur->devguid, guidstr, sizeof(guidstr)/sizeof(*guidstr));
 279             ret = RegOpenKeyExW(flow == eRender ? key_render : key_capture, guidstr, 0, KEY_WRITE, &key);
 280             if (ret == ERROR_SUCCESS)
 281             {
 282                 RegSetValueExW(key, reg_devicestate, 0, REG_DWORD, (const BYTE*)&state, sizeof(DWORD));
 283                 RegCloseKey(key);
 284             }
 285             goto done;
 286         }
 287     }
 288
 289     /* No device found, allocate new one */
 290     cur = HeapAlloc(GetProcessHeap(), 0, sizeof(*cur));
 291     if (!cur){
 292         HeapFree(GetProcessHeap(), 0, devkey);
 293         return NULL;
 294     }
 295     cur->drv_id = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(name)+1)*sizeof(WCHAR));
 296     if (!cur->drv_id)
 297     {
 298         HeapFree(GetProcessHeap(), 0, cur);
 299         HeapFree(GetProcessHeap(), 0, devkey);
 300         return NULL;
 301     }
 302     lstrcpyW(cur->drv_id, name);
 303     cur->key = devkey;
 304     cur->IMMDevice_iface.lpVtbl = &MMDeviceVtbl;
 305     cur->IMMEndpoint_iface.lpVtbl = &MMEndpointVtbl;
 306     cur->ref = 0;
 307     InitializeCriticalSection(&cur->crst);
 308     cur->crst.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": MMDevice.crst");
 309     cur->flow = flow;
 310     cur->state = state;
 311     if (!id)
 312     {
 313         id = &cur->devguid;
 314         CoCreateGuid(id);
 315     }
 316     cur->devguid = *id;
 317     StringFromGUID2(id, guidstr, sizeof(guidstr)/sizeof(*guidstr));
 318     if (flow == eRender)
 319         root = key_render;
 320     else
 321         root = key_capture;
 322     if (!RegCreateKeyExW(root, guidstr, 0, NULL, 0, KEY_WRITE|KEY_READ, NULL, &key, NULL))
 323     {
 324         HKEY keyprop;
 325         RegSetValueExW(key, reg_devicestate, 0, REG_DWORD, (const BYTE*)&state, sizeof(DWORD));
 326         if (!RegCreateKeyExW(key, reg_properties, 0, NULL, 0, KEY_WRITE|KEY_READ, NULL, &keyprop, NULL))
 327         {
 328             PROPVARIANT pv;
 329             pv.vt = VT_LPWSTR;
 330             pv.u.pwszVal = name;
 331             MMDevice_SetPropValue(id, flow, (const PROPERTYKEY*)&DEVPKEY_Device_FriendlyName, &pv);
 332             MMDevice_SetPropValue(id, flow, (const PROPERTYKEY*)&DEVPKEY_Device_DeviceDesc, &pv);
 333             RegCloseKey(keyprop);
 334         }
 335         RegCloseKey(key);
 336     }
 337     if (!MMDevice_head)
 338         MMDevice_head = HeapAlloc(GetProcessHeap(), 0, sizeof(*MMDevice_head));
 339     else
 340         MMDevice_head = HeapReAlloc(GetProcessHeap(), 0, MMDevice_head, sizeof(*MMDevice_head)*(1+MMDevice_count));
 341     MMDevice_head[MMDevice_count++] = cur;
 342
 343 done:
 344     if (setdefault)
 345     {
 346         if (flow == eRender)
 347             MMDevice_def_play = cur;
 348         else
 349             MMDevice_def_rec = cur;
 350     }
 351     return cur;
 352 }
 353
 354 static HRESULT load_devices_from_reg(void)
 355 {
 356     DWORD i = 0;
 357     HKEY root, cur;
 358     LONG ret;
 359     DWORD curflow;
 360
 361     ret = RegCreateKeyExW(HKEY_LOCAL_MACHINE, software_mmdevapi, 0, NULL, 0, KEY_WRITE|KEY_READ, NULL, &root, NULL);
 362     if (ret == ERROR_SUCCESS)
 363         ret = RegCreateKeyExW(root, reg_capture, 0, NULL, 0, KEY_READ|KEY_WRITE, NULL, &key_capture, NULL);
 364     if (ret == ERROR_SUCCESS)
 365         ret = RegCreateKeyExW(root, reg_render, 0, NULL, 0, KEY_READ|KEY_WRITE, NULL, &key_render, NULL);
 366     RegCloseKey(root);
 367     cur = key_capture;
 368     curflow = eCapture;
 369     if (ret != ERROR_SUCCESS)
 370     {
 371         RegCloseKey(key_capture);
 372         key_render = key_capture = NULL;
 373         WARN("Couldn't create key: %u\n", ret);
 374         return E_FAIL;
 375     }
 376
 377     do {
 378         WCHAR guidvalue[39];
 379         GUID guid;
 380         DWORD len;
 381         PROPVARIANT pv = { VT_EMPTY };
 382
 383         len = sizeof(guidvalue)/sizeof(guidvalue[0]);
 384         ret = RegEnumKeyExW(cur, i++, guidvalue, &len, NULL, NULL, NULL, NULL);
 385         if (ret == ERROR_NO_MORE_ITEMS)
 386         {
 387             if (cur == key_capture)
 388             {
 389                 cur = key_render;
 390                 curflow = eRender;
 391                 i = 0;
 392                 continue;
 393             }
 394             break;
 395         }
 396         if (ret != ERROR_SUCCESS)
 397             continue;
 398         if (SUCCEEDED(CLSIDFromString(guidvalue, &guid))
 399             && SUCCEEDED(MMDevice_GetPropValue(&guid, curflow, (const PROPERTYKEY*)&DEVPKEY_Device_FriendlyName, &pv))
 400             && pv.vt == VT_LPWSTR)
 401         {
 402             MMDevice_Create(pv.u.pwszVal, NULL, &guid, curflow,
 403                     DEVICE_STATE_NOTPRESENT, FALSE);
 404             CoTaskMemFree(pv.u.pwszVal);
 405         }
 406     } while (1);
 407
 408     return S_OK;
 409 }
 410
 411 static HRESULT set_format(MMDevice *dev)
 412 {
 413     HRESULT hr;
 414     IAudioClient *client;
 415     WAVEFORMATEX *fmt;
 416     PROPVARIANT pv = { VT_EMPTY };
 417
 418     hr = drvs.pGetAudioEndpoint(dev->key, &dev->IMMDevice_iface, dev->flow, &client);
 419     if(FAILED(hr))
 420         return hr;
 421
 422     hr = IAudioClient_GetMixFormat(client, &fmt);
 423     if(FAILED(hr)){
 424         IAudioClient_Release(client);
 425         return hr;
 426     }
 427
 428     IAudioClient_Release(client);
 429
 430     pv.vt = VT_BLOB;
 431     pv.u.blob.cbSize = sizeof(WAVEFORMATEX) + fmt->cbSize;
 432     pv.u.blob.pBlobData = (BYTE*)fmt;
 433     MMDevice_SetPropValue(&dev->devguid, dev->flow,
 434             &PKEY_AudioEngine_DeviceFormat, &pv);
 435     MMDevice_SetPropValue(&dev->devguid, dev->flow,
 436             &PKEY_AudioEngine_OEMFormat, &pv);
 437
 438     return S_OK;
 439 }
 440
 441 static HRESULT load_driver_devices(EDataFlow flow)
 442 {
 443     WCHAR **ids;
 444     void **keys;
 445     UINT num, def, i;
 446     HRESULT hr;
 447
 448     hr = drvs.pGetEndpointIDs(flow, &ids, &keys, &num, &def);
 449     if(FAILED(hr))
 450         return hr;
 451
 452     for(i = 0; i < num; ++i){
 453         MMDevice *dev;
 454         dev = MMDevice_Create(ids[i], keys[i], NULL, flow, DEVICE_STATE_ACTIVE,
 455                 def == i);
 456         set_format(dev);
 457         HeapFree(GetProcessHeap(), 0, ids[i]);
 458     }
 459
 460     HeapFree(GetProcessHeap(), 0, keys);
 461     HeapFree(GetProcessHeap(), 0, ids);
 462
 463     return S_OK;
 464 }
 465
 466 static void MMDevice_Destroy(MMDevice *This)
 467 {
 468     DWORD i;
 469     TRACE("Freeing %s\n", debugstr_w(This->drv_id));
 470     /* Since this function is called at destruction time, reordering of the list is unimportant */
 471     for (i = 0; i < MMDevice_count; ++i)
 472     {
 473         if (MMDevice_head[i] == This)
 474         {
 475             MMDevice_head[i] = MMDevice_head[--MMDevice_count];
 476             break;
 477         }
 478     }
 479     This->crst.DebugInfo->Spare[0] = 0;
 480     DeleteCriticalSection(&This->crst);
 481     HeapFree(GetProcessHeap(), 0, This->drv_id);
 482     HeapFree(GetProcessHeap(), 0, This->key);
 483     HeapFree(GetProcessHeap(), 0, This);
 484 }
 485
 486 static inline MMDevice *impl_from_IMMDevice(IMMDevice *iface)
 487 {
 488     return CONTAINING_RECORD(iface, MMDevice, IMMDevice_iface);
 489 }
 490
 491 static HRESULT WINAPI MMDevice_QueryInterface(IMMDevice *iface, REFIID riid, void **ppv)
 492 {
 493     MMDevice *This = impl_from_IMMDevice(iface);
 494     TRACE("(%p)->(%s,%p)\n", iface, debugstr_guid(riid), ppv);
 495
 496     if (!ppv)
 497         return E_POINTER;
 498     *ppv = NULL;
 499     if (IsEqualIID(riid, &IID_IUnknown)
 500         || IsEqualIID(riid, &IID_IMMDevice))
 501         *ppv = This;
 502     else if (IsEqualIID(riid, &IID_IMMEndpoint))
 503         *ppv = &This->IMMEndpoint_iface;
 504     if (*ppv)
 505     {
 506         IUnknown_AddRef((IUnknown*)*ppv);
 507         return S_OK;
 508     }
 509     WARN("Unknown interface %s\n", debugstr_guid(riid));
 510     return E_NOINTERFACE;
 511 }
 512
 513 static ULONG WINAPI MMDevice_AddRef(IMMDevice *iface)
 514 {
 515     MMDevice *This = impl_from_IMMDevice(iface);
 516     LONG ref;
 517
 518     ref = InterlockedIncrement(&This->ref);
 519     TRACE("Refcount now %i\n", ref);
 520     return ref;
 521 }
 522
 523 static ULONG WINAPI MMDevice_Release(IMMDevice *iface)
 524 {
 525     MMDevice *This = impl_from_IMMDevice(iface);
 526     LONG ref;
 527
 528     ref = InterlockedDecrement(&This->ref);
 529     TRACE("Refcount now %i\n", ref);
 530     return ref;
 531 }
 532
 533 static HRESULT WINAPI MMDevice_Activate(IMMDevice *iface, REFIID riid, DWORD clsctx, PROPVARIANT *params, void **ppv)
 534 {
 535     HRESULT hr = E_NOINTERFACE;
 536     MMDevice *This = impl_from_IMMDevice(iface);
 537
 538     TRACE("(%p)->(%p,%x,%p,%p)\n", iface, riid, clsctx, params, ppv);
 539
 540     if (!ppv)
 541         return E_POINTER;
 542
 543     if (IsEqualIID(riid, &IID_IAudioClient)){
 544         hr = drvs.pGetAudioEndpoint(This->key, iface, This->flow, (IAudioClient**)ppv);
 545     }else if (IsEqualIID(riid, &IID_IAudioEndpointVolume))
 546         hr = AudioEndpointVolume_Create(This, (IAudioEndpointVolume**)ppv);
 547     else if (IsEqualIID(riid, &IID_IAudioSessionManager)
 548              || IsEqualIID(riid, &IID_IAudioSessionManager2))
 549     {
 550         FIXME("IID_IAudioSessionManager unsupported\n");
 551     }
 552     else if (IsEqualIID(riid, &IID_IBaseFilter))
 553     {
 554         if (This->flow == eRender)
 555             hr = CoCreateInstance(&CLSID_DSoundRender, NULL, clsctx, riid, ppv);
 556         else
 557             ERR("Not supported for recording?\n");
 558         if (SUCCEEDED(hr))
 559         {
 560             IPersistPropertyBag *ppb;
 561             hr = IUnknown_QueryInterface((IUnknown*)*ppv, &IID_IPersistPropertyBag, (void*)&ppb);
 562             if (SUCCEEDED(hr))
 563             {
 564                 /* ::Load cannot assume the interface stays alive after the function returns,
 565                  * so just create the interface on the stack, saves a lot of complicated code */
 566                 IPropertyBagImpl bag = { { &PB_Vtbl }, This->devguid };
 567                 hr = IPersistPropertyBag_Load(ppb, &bag.IPropertyBag_iface, NULL);
 568                 IPersistPropertyBag_Release(ppb);
 569                 if (FAILED(hr))
 570                     IBaseFilter_Release((IBaseFilter*)*ppv);
 571             }
 572             else
 573             {
 574                 FIXME("Wine doesn't support IPersistPropertyBag on DSoundRender yet, ignoring..\n");
 575                 hr = S_OK;
 576             }
 577         }
 578     }
 579     else if (IsEqualIID(riid, &IID_IDeviceTopology))
 580     {
 581         FIXME("IID_IDeviceTopology unsupported\n");
 582     }
 583     else if (IsEqualIID(riid, &IID_IDirectSound)
 584              || IsEqualIID(riid, &IID_IDirectSound8))
 585     {
 586         if (This->flow == eRender)
 587             hr = CoCreateInstance(&CLSID_DirectSound8, NULL, clsctx, riid, ppv);
 588         if (SUCCEEDED(hr))
 589         {
 590             hr = IDirectSound_Initialize((IDirectSound*)*ppv, &This->devguid);
 591             if (FAILED(hr))
 592                 IDirectSound_Release((IDirectSound*)*ppv);
 593         }
 594     }
 595     else if (IsEqualIID(riid, &IID_IDirectSoundCapture)
 596              || IsEqualIID(riid, &IID_IDirectSoundCapture8))
 597     {
 598         if (This->flow == eCapture)
 599             hr = CoCreateInstance(&CLSID_DirectSoundCapture8, NULL, clsctx, riid, ppv);
 600         if (SUCCEEDED(hr))
 601         {
 602             hr = IDirectSoundCapture_Initialize((IDirectSoundCapture*)*ppv, &This->devguid);
 603             if (FAILED(hr))
 604                 IDirectSoundCapture_Release((IDirectSoundCapture*)*ppv);
 605         }
 606     }
 607     else
 608         ERR("Invalid/unknown iid %s\n", debugstr_guid(riid));
 609
 610     if (FAILED(hr))
 611         *ppv = NULL;
 612
 613     TRACE("Returning %08x\n", hr);
 614     return hr;
 615 }
 616
 617 static HRESULT WINAPI MMDevice_OpenPropertyStore(IMMDevice *iface, DWORD access, IPropertyStore **ppv)
 618 {
 619     MMDevice *This = impl_from_IMMDevice(iface);
 620     TRACE("(%p)->(%x,%p)\n", This, access, ppv);
 621
 622     if (!ppv)
 623         return E_POINTER;
 624     return MMDevPropStore_Create(This, access, ppv);
 625 }
 626
 627 static HRESULT WINAPI MMDevice_GetId(IMMDevice *iface, WCHAR **itemid)
 628 {
 629     MMDevice *This = impl_from_IMMDevice(iface);
 630     WCHAR *str;
 631     GUID *id = &This->devguid;
 632     static const WCHAR formatW[] = { '{','0','.','0','.','0','.','0','0','0','0','0','0','0','0','}','.',
 633                                      '{','%','0','8','X','-','%','0','4','X','-',
 634                                      '%','0','4','X','-','%','0','2','X','%','0','2','X','-',
 635                                      '%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X',
 636                                      '%','0','2','X','%','0','2','X','}',0 };
 637
 638     TRACE("(%p)->(%p)\n", This, itemid);
 639     if (!itemid)
 640         return E_POINTER;
 641     *itemid = str = CoTaskMemAlloc(56 * sizeof(WCHAR));
 642     if (!str)
 643         return E_OUTOFMEMORY;
 644     wsprintfW( str, formatW, id->Data1, id->Data2, id->Data3,
 645                id->Data4[0], id->Data4[1], id->Data4[2], id->Data4[3],
 646                id->Data4[4], id->Data4[5], id->Data4[6], id->Data4[7] );
 647     return S_OK;
 648 }
 649
 650 static HRESULT WINAPI MMDevice_GetState(IMMDevice *iface, DWORD *state)
 651 {
 652     MMDevice *This = impl_from_IMMDevice(iface);
 653     TRACE("(%p)->(%p)\n", iface, state);
 654
 655     if (!state)
 656         return E_POINTER;
 657     *state = This->state;
 658     return S_OK;
 659 }
 660
 661 static const IMMDeviceVtbl MMDeviceVtbl =
 662 {
 663     MMDevice_QueryInterface,
 664     MMDevice_AddRef,
 665     MMDevice_Release,
 666     MMDevice_Activate,
 667     MMDevice_OpenPropertyStore,
 668     MMDevice_GetId,
 669     MMDevice_GetState
 670 };
 671
 672 static inline MMDevice *impl_from_IMMEndpoint(IMMEndpoint *iface)
 673 {
 674     return CONTAINING_RECORD(iface, MMDevice, IMMEndpoint_iface);
 675 }
 676
 677 static HRESULT WINAPI MMEndpoint_QueryInterface(IMMEndpoint *iface, REFIID riid, void **ppv)
 678 {
 679     MMDevice *This = impl_from_IMMEndpoint(iface);
 680     return IMMDevice_QueryInterface(&This->IMMDevice_iface, riid, ppv);
 681 }
 682
 683 static ULONG WINAPI MMEndpoint_AddRef(IMMEndpoint *iface)
 684 {
 685     MMDevice *This = impl_from_IMMEndpoint(iface);
 686     return IMMDevice_AddRef(&This->IMMDevice_iface);
 687 }
 688
 689 static ULONG WINAPI MMEndpoint_Release(IMMEndpoint *iface)
 690 {
 691     MMDevice *This = impl_from_IMMEndpoint(iface);
 692     return IMMDevice_Release(&This->IMMDevice_iface);
 693 }
 694
 695 static HRESULT WINAPI MMEndpoint_GetDataFlow(IMMEndpoint *iface, EDataFlow *flow)
 696 {
 697     MMDevice *This = impl_from_IMMEndpoint(iface);
 698     if (!flow)
 699         return E_POINTER;
 700     *flow = This->flow;
 701     return S_OK;
 702 }
 703
 704 static const IMMEndpointVtbl MMEndpointVtbl =
 705 {
 706     MMEndpoint_QueryInterface,
 707     MMEndpoint_AddRef,
 708     MMEndpoint_Release,
 709     MMEndpoint_GetDataFlow
 710 };
 711
 712 static HRESULT MMDevCol_Create(IMMDeviceCollection **ppv, EDataFlow flow, DWORD state)
 713 {
 714     MMDevColImpl *This;
 715
 716     This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
 717     *ppv = NULL;
 718     if (!This)
 719         return E_OUTOFMEMORY;
 720     This->IMMDeviceCollection_iface.lpVtbl = &MMDevColVtbl;
 721     This->ref = 1;
 722     This->flow = flow;
 723     This->state = state;
 724     *ppv = &This->IMMDeviceCollection_iface;
 725     return S_OK;
 726 }
 727
 728 static void MMDevCol_Destroy(MMDevColImpl *This)
 729 {
 730     HeapFree(GetProcessHeap(), 0, This);
 731 }
 732
 733 static HRESULT WINAPI MMDevCol_QueryInterface(IMMDeviceCollection *iface, REFIID riid, void **ppv)
 734 {
 735     MMDevColImpl *This = impl_from_IMMDeviceCollection(iface);
 736
 737     if (!ppv)
 738         return E_POINTER;
 739     if (IsEqualIID(riid, &IID_IUnknown)
 740         || IsEqualIID(riid, &IID_IMMDeviceCollection))
 741         *ppv = This;
 742     else
 743         *ppv = NULL;
 744     if (!*ppv)
 745         return E_NOINTERFACE;
 746     IUnknown_AddRef((IUnknown*)*ppv);
 747     return S_OK;
 748 }
 749
 750 static ULONG WINAPI MMDevCol_AddRef(IMMDeviceCollection *iface)
 751 {
 752     MMDevColImpl *This = impl_from_IMMDeviceCollection(iface);
 753     LONG ref = InterlockedIncrement(&This->ref);
 754     TRACE("Refcount now %i\n", ref);
 755     return ref;
 756 }
 757
 758 static ULONG WINAPI MMDevCol_Release(IMMDeviceCollection *iface)
 759 {
 760     MMDevColImpl *This = impl_from_IMMDeviceCollection(iface);
 761     LONG ref = InterlockedDecrement(&This->ref);
 762     TRACE("Refcount now %i\n", ref);
 763     if (!ref)
 764         MMDevCol_Destroy(This);
 765     return ref;
 766 }
 767
 768 static HRESULT WINAPI MMDevCol_GetCount(IMMDeviceCollection *iface, UINT *numdevs)
 769 {
 770     MMDevColImpl *This = impl_from_IMMDeviceCollection(iface);
 771     DWORD i;
 772
 773     TRACE("(%p)->(%p)\n", This, numdevs);
 774     if (!numdevs)
 775         return E_POINTER;
 776
 777     *numdevs = 0;
 778     for (i = 0; i < MMDevice_count; ++i)
 779     {
 780         MMDevice *cur = MMDevice_head[i];
 781         if ((cur->flow == This->flow || This->flow == eAll)
 782             && (cur->state & This->state))
 783             ++(*numdevs);
 784     }
 785     return S_OK;
 786 }
 787
 788 static HRESULT WINAPI MMDevCol_Item(IMMDeviceCollection *iface, UINT n, IMMDevice **dev)
 789 {
 790     MMDevColImpl *This = impl_from_IMMDeviceCollection(iface);
 791     DWORD i = 0, j = 0;
 792
 793     TRACE("(%p)->(%u, %p)\n", This, n, dev);
 794     if (!dev)
 795         return E_POINTER;
 796
 797     for (j = 0; j < MMDevice_count; ++j)
 798     {
 799         MMDevice *cur = MMDevice_head[j];
 800         if ((cur->flow == This->flow || This->flow == eAll)
 801             && (cur->state & This->state)
 802             && i++ == n)
 803         {
 804             *dev = &cur->IMMDevice_iface;
 805             IMMDevice_AddRef(*dev);
 806             return S_OK;
 807         }
 808     }
 809     WARN("Could not obtain item %u\n", n);
 810     *dev = NULL;
 811     return E_INVALIDARG;
 812 }
 813
 814 static const IMMDeviceCollectionVtbl MMDevColVtbl =
 815 {
 816     MMDevCol_QueryInterface,
 817     MMDevCol_AddRef,
 818     MMDevCol_Release,
 819     MMDevCol_GetCount,
 820     MMDevCol_Item
 821 };
 822
 823 HRESULT MMDevEnum_Create(REFIID riid, void **ppv)
 824 {
 825     MMDevEnumImpl *This = MMDevEnumerator;
 826
 827     if (!This)
 828     {
 829         This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
 830         *ppv = NULL;
 831         if (!This)
 832             return E_OUTOFMEMORY;
 833         This->ref = 1;
 834         This->IMMDeviceEnumerator_iface.lpVtbl = &MMDevEnumVtbl;
 835         MMDevEnumerator = This;
 836
 837         load_devices_from_reg();
 838         load_driver_devices(eRender);
 839         load_driver_devices(eCapture);
 840     }
 841     return IUnknown_QueryInterface((IUnknown*)This, riid, ppv);
 842 }
 843
 844 void MMDevEnum_Free(void)
 845 {
 846     while (MMDevice_count)
 847         MMDevice_Destroy(MMDevice_head[0]);
 848     RegCloseKey(key_render);
 849     RegCloseKey(key_capture);
 850     key_render = key_capture = NULL;
 851     HeapFree(GetProcessHeap(), 0, MMDevEnumerator);
 852     MMDevEnumerator = NULL;
 853 }
 854
 855 static HRESULT WINAPI MMDevEnum_QueryInterface(IMMDeviceEnumerator *iface, REFIID riid, void **ppv)
 856 {
 857     MMDevEnumImpl *This = impl_from_IMMDeviceEnumerator(iface);
 858
 859     if (!ppv)
 860         return E_POINTER;
 861     if (IsEqualIID(riid, &IID_IUnknown)
 862         || IsEqualIID(riid, &IID_IMMDeviceEnumerator))
 863         *ppv = This;
 864     else
 865         *ppv = NULL;
 866     if (!*ppv)
 867         return E_NOINTERFACE;
 868     IUnknown_AddRef((IUnknown*)*ppv);
 869     return S_OK;
 870 }
 871
 872 static ULONG WINAPI MMDevEnum_AddRef(IMMDeviceEnumerator *iface)
 873 {
 874     MMDevEnumImpl *This = impl_from_IMMDeviceEnumerator(iface);
 875     LONG ref = InterlockedIncrement(&This->ref);
 876     TRACE("Refcount now %i\n", ref);
 877     return ref;
 878 }
 879
 880 static ULONG WINAPI MMDevEnum_Release(IMMDeviceEnumerator *iface)
 881 {
 882     MMDevEnumImpl *This = impl_from_IMMDeviceEnumerator(iface);
 883     LONG ref = InterlockedDecrement(&This->ref);
 884     if (!ref)
 885         MMDevEnum_Free();
 886     TRACE("Refcount now %i\n", ref);
 887     return ref;
 888 }
 889
 890 static HRESULT WINAPI MMDevEnum_EnumAudioEndpoints(IMMDeviceEnumerator *iface, EDataFlow flow, DWORD mask, IMMDeviceCollection **devices)
 891 {
 892     MMDevEnumImpl *This = impl_from_IMMDeviceEnumerator(iface);
 893     TRACE("(%p)->(%u,%u,%p)\n", This, flow, mask, devices);
 894     if (!devices)
 895         return E_POINTER;
 896     *devices = NULL;
 897     if (flow >= EDataFlow_enum_count)
 898         return E_INVALIDARG;
 899     if (mask & ~DEVICE_STATEMASK_ALL)
 900         return E_INVALIDARG;
 901     return MMDevCol_Create(devices, flow, mask);
 902 }
 903
 904 static HRESULT WINAPI MMDevEnum_GetDefaultAudioEndpoint(IMMDeviceEnumerator *iface, EDataFlow flow, ERole role, IMMDevice **device)
 905 {
 906     MMDevEnumImpl *This = impl_from_IMMDeviceEnumerator(iface);
 907     TRACE("(%p)->(%u,%u,%p)\n", This, flow, role, device);
 908
 909     if (!device)
 910         return E_POINTER;
 911     *device = NULL;
 912
 913     if (flow == eRender)
 914         *device = &MMDevice_def_play->IMMDevice_iface;
 915     else if (flow == eCapture)
 916         *device = &MMDevice_def_rec->IMMDevice_iface;
 917     else
 918     {
 919         WARN("Unknown flow %u\n", flow);
 920         return E_INVALIDARG;
 921     }
 922
 923     if (!*device)
 924         return E_NOTFOUND;
 925     IMMDevice_AddRef(*device);
 926     return S_OK;
 927 }
 928
 929 static HRESULT WINAPI MMDevEnum_GetDevice(IMMDeviceEnumerator *iface, const WCHAR *name, IMMDevice **device)
 930 {
 931     MMDevEnumImpl *This = impl_from_IMMDeviceEnumerator(iface);
 932     DWORD i=0;
 933     IMMDevice *dev = NULL;
 934
 935     if(!name || !device)
 936         return E_POINTER;
 937
 938     TRACE("(%p)->(%s,%p)\n", This, debugstr_w(name), device);
 939     for (i = 0; i < MMDevice_count; ++i)
 940     {
 941         WCHAR *str;
 942         dev = &MMDevice_head[i]->IMMDevice_iface;
 943         IMMDevice_GetId(dev, &str);
 944
 945         if (str && !lstrcmpW(str, name))
 946         {
 947             CoTaskMemFree(str);
 948             IUnknown_AddRef(dev);
 949             *device = dev;
 950             return S_OK;
 951         }
 952         CoTaskMemFree(str);
 953     }
 954     TRACE("Could not find device %s\n", debugstr_w(name));
 955     return E_INVALIDARG;
 956 }
 957
 958 static HRESULT WINAPI MMDevEnum_RegisterEndpointNotificationCallback(IMMDeviceEnumerator *iface, IMMNotificationClient *client)
 959 {
 960     MMDevEnumImpl *This = impl_from_IMMDeviceEnumerator(iface);
 961     TRACE("(%p)->(%p)\n", This, client);
 962     FIXME("stub\n");
 963     return S_OK;
 964 }
 965
 966 static HRESULT WINAPI MMDevEnum_UnregisterEndpointNotificationCallback(IMMDeviceEnumerator *iface, IMMNotificationClient *client)
 967 {
 968     MMDevEnumImpl *This = impl_from_IMMDeviceEnumerator(iface);
 969     TRACE("(%p)->(%p)\n", This, client);
 970     FIXME("stub\n");
 971     return S_OK;
 972 }
 973
 974 static const IMMDeviceEnumeratorVtbl MMDevEnumVtbl =
 975 {
 976     MMDevEnum_QueryInterface,
 977     MMDevEnum_AddRef,
 978     MMDevEnum_Release,
 979     MMDevEnum_EnumAudioEndpoints,
 980     MMDevEnum_GetDefaultAudioEndpoint,
 981     MMDevEnum_GetDevice,
 982     MMDevEnum_RegisterEndpointNotificationCallback,
 983     MMDevEnum_UnregisterEndpointNotificationCallback
 984 };
 985
 986 static HRESULT MMDevPropStore_Create(MMDevice *parent, DWORD access, IPropertyStore **ppv)
 987 {
 988     MMDevPropStore *This;
 989     if (access != STGM_READ
 990         && access != STGM_WRITE
 991         && access != STGM_READWRITE)
 992     {
 993         WARN("Invalid access %08x\n", access);
 994         return E_INVALIDARG;
 995     }
 996     This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
 997     *ppv = &This->IPropertyStore_iface;
 998     if (!This)
 999         return E_OUTOFMEMORY;
1000     This->IPropertyStore_iface.lpVtbl = &MMDevPropVtbl;
1001     This->ref = 1;
1002     This->parent = parent;
1003     This->access = access;
1004     return S_OK;
1005 }
1006
1007 static void MMDevPropStore_Destroy(MMDevPropStore *This)
1008 {
1009     HeapFree(GetProcessHeap(), 0, This);
1010 }
1011
1012 static HRESULT WINAPI MMDevPropStore_QueryInterface(IPropertyStore *iface, REFIID riid, void **ppv)
1013 {
1014     MMDevPropStore *This = impl_from_IPropertyStore(iface);
1015
1016     if (!ppv)
1017         return E_POINTER;
1018     if (IsEqualIID(riid, &IID_IUnknown)
1019         || IsEqualIID(riid, &IID_IPropertyStore))
1020         *ppv = This;
1021     else
1022         *ppv = NULL;
1023     if (!*ppv)
1024         return E_NOINTERFACE;
1025     IUnknown_AddRef((IUnknown*)*ppv);
1026     return S_OK;
1027 }
1028
1029 static ULONG WINAPI MMDevPropStore_AddRef(IPropertyStore *iface)
1030 {
1031     MMDevPropStore *This = impl_from_IPropertyStore(iface);
1032     LONG ref = InterlockedIncrement(&This->ref);
1033     TRACE("Refcount now %i\n", ref);
1034     return ref;
1035 }
1036
1037 static ULONG WINAPI MMDevPropStore_Release(IPropertyStore *iface)
1038 {
1039     MMDevPropStore *This = impl_from_IPropertyStore(iface);
1040     LONG ref = InterlockedDecrement(&This->ref);
1041     TRACE("Refcount now %i\n", ref);
1042     if (!ref)
1043         MMDevPropStore_Destroy(This);
1044     return ref;
1045 }
1046
1047 static HRESULT WINAPI MMDevPropStore_GetCount(IPropertyStore *iface, DWORD *nprops)
1048 {
1049     MMDevPropStore *This = impl_from_IPropertyStore(iface);
1050     WCHAR buffer[50];
1051     DWORD i = 0;
1052     HKEY propkey;
1053     HRESULT hr;
1054
1055     TRACE("(%p)->(%p)\n", iface, nprops);
1056     if (!nprops)
1057         return E_POINTER;
1058     hr = MMDevPropStore_OpenPropKey(&This->parent->devguid, This->parent->flow, &propkey);
1059     if (FAILED(hr))
1060         return hr;
1061     *nprops = 0;
1062     do {
1063         DWORD len = sizeof(buffer)/sizeof(*buffer);
1064         if (RegEnumKeyExW(propkey, i, buffer, &len, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
1065             break;
1066         i++;
1067     } while (0);
1068     RegCloseKey(propkey);
1069     TRACE("Returning %i\n", i);
1070     *nprops = i;
1071     return S_OK;
1072 }
1073
1074 static HRESULT WINAPI MMDevPropStore_GetAt(IPropertyStore *iface, DWORD prop, PROPERTYKEY *key)
1075 {
1076     MMDevPropStore *This = impl_from_IPropertyStore(iface);
1077     WCHAR buffer[50];
1078     DWORD len = sizeof(buffer)/sizeof(*buffer);
1079     HRESULT hr;
1080     HKEY propkey;
1081
1082     TRACE("(%p)->(%u,%p)\n", iface, prop, key);
1083     if (!key)
1084         return E_POINTER;
1085
1086     hr = MMDevPropStore_OpenPropKey(&This->parent->devguid, This->parent->flow, &propkey);
1087     if (FAILED(hr))
1088         return hr;
1089
1090     if (RegEnumKeyExW(propkey, prop, buffer, &len, NULL, NULL, NULL, NULL) != ERROR_SUCCESS
1091         || len <= 40)
1092     {
1093         WARN("GetAt %u failed\n", prop);
1094         return E_INVALIDARG;
1095     }
1096     RegCloseKey(propkey);
1097     buffer[39] = 0;
1098     CLSIDFromString(buffer, &key->fmtid);
1099     key->pid = atoiW(&buffer[40]);
1100     return S_OK;
1101 }
1102
1103 static HRESULT WINAPI MMDevPropStore_GetValue(IPropertyStore *iface, REFPROPERTYKEY key, PROPVARIANT *pv)
1104 {
1105     MMDevPropStore *This = impl_from_IPropertyStore(iface);
1106     TRACE("(%p)->(\"%s,%u\", %p\n", This, debugstr_guid(&key->fmtid), key ? key->pid : 0, pv);
1107
1108     if (!key || !pv)
1109         return E_POINTER;
1110     if (This->access != STGM_READ
1111         && This->access != STGM_READWRITE)
1112         return STG_E_ACCESSDENIED;
1113
1114     /* Special case */
1115     if (IsEqualPropertyKey(*key, PKEY_AudioEndpoint_GUID))
1116     {
1117         pv->vt = VT_LPWSTR;
1118         pv->u.pwszVal = CoTaskMemAlloc(39 * sizeof(WCHAR));
1119         if (!pv->u.pwszVal)
1120             return E_OUTOFMEMORY;
1121         StringFromGUID2(&This->parent->devguid, pv->u.pwszVal, 39);
1122         return S_OK;
1123     }
1124
1125     return MMDevice_GetPropValue(&This->parent->devguid, This->parent->flow, key, pv);
1126 }
1127
1128 static HRESULT WINAPI MMDevPropStore_SetValue(IPropertyStore *iface, REFPROPERTYKEY key, REFPROPVARIANT pv)
1129 {
1130     MMDevPropStore *This = impl_from_IPropertyStore(iface);
1131
1132     if (!key || !pv)
1133         return E_POINTER;
1134
1135     if (This->access != STGM_WRITE
1136         && This->access != STGM_READWRITE)
1137         return STG_E_ACCESSDENIED;
1138     return MMDevice_SetPropValue(&This->parent->devguid, This->parent->flow, key, pv);
1139 }
1140
1141 static HRESULT WINAPI MMDevPropStore_Commit(IPropertyStore *iface)
1142 {
1143     FIXME("stub\n");
1144     return E_NOTIMPL;
1145 }
1146
1147 static const IPropertyStoreVtbl MMDevPropVtbl =
1148 {
1149     MMDevPropStore_QueryInterface,
1150     MMDevPropStore_AddRef,
1151     MMDevPropStore_Release,
1152     MMDevPropStore_GetCount,
1153     MMDevPropStore_GetAt,
1154     MMDevPropStore_GetValue,
1155     MMDevPropStore_SetValue,
1156     MMDevPropStore_Commit
1157 };
1158
1159
1160 /* Property bag for IBaseFilter activation */
1161 static HRESULT WINAPI PB_QueryInterface(IPropertyBag *iface, REFIID riid, void **ppv)
1162 {
1163     ERR("Should not be called\n");
1164     *ppv = NULL;
1165     return E_NOINTERFACE;
1166 }
1167
1168 static ULONG WINAPI PB_AddRef(IPropertyBag *iface)
1169 {
1170     ERR("Should not be called\n");
1171     return 2;
1172 }
1173
1174 static ULONG WINAPI PB_Release(IPropertyBag *iface)
1175 {
1176     ERR("Should not be called\n");
1177     return 1;
1178 }
1179
1180 static HRESULT WINAPI PB_Read(IPropertyBag *iface, LPCOLESTR name, VARIANT *var, IErrorLog *log)
1181 {
1182     static const WCHAR dsguid[] = { 'D','S','G','u','i','d', 0 };
1183     IPropertyBagImpl *This = impl_from_IPropertyBag(iface);
1184     TRACE("Trying to read %s, type %u\n", debugstr_w(name), var->n1.n2.vt);
1185     if (!lstrcmpW(name, dsguid))
1186     {
1187         WCHAR guidstr[39];
1188         StringFromGUID2(&This->devguid, guidstr,sizeof(guidstr)/sizeof(*guidstr));
1189         var->n1.n2.vt = VT_BSTR;
1190         var->n1.n2.n3.bstrVal = SysAllocString(guidstr);
1191         return S_OK;
1192     }
1193     ERR("Unknown property '%s' queried\n", debugstr_w(name));
1194     return E_FAIL;
1195 }
1196
1197 static HRESULT WINAPI PB_Write(IPropertyBag *iface, LPCOLESTR name, VARIANT *var)
1198 {
1199     ERR("Should not be called\n");
1200     return E_FAIL;
1201 }
1202
1203 static const IPropertyBagVtbl PB_Vtbl =
1204 {
1205     PB_QueryInterface,
1206     PB_AddRef,
1207     PB_Release,
1208     PB_Read,
1209     PB_Write
1210 };