reactos/dll/directx/msdmo/dmoreg.c

   1 /*
   2  * Copyright (C) 2003 Michael Günnewig
   3  * Copyright (C) 2003 CodeWeavers Inc. (Ulrich Czekalla)
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include <stdarg.h>
  21
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "winuser.h"
  25 #include "winerror.h"
  26 #include "winreg.h"
  27 #include "objbase.h"
  28 #include "wine/unicode.h"
  29 #include "wine/debug.h"
  30 #include "initguid.h"
  31 #include "dmo.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(msdmo);
  34
  35 #define MSDMO_MAJOR_VERSION 6
  36
  37 static const WCHAR szDMORootKey[] =
  38 {
  39     'D','i','r','e','c','t','S','h','o','w','\\',
  40     'M','e','d','i','a','O','b','j','e','c','t','s',0
  41 };
  42
  43 static const WCHAR szDMOInputType[] =
  44 {
  45     'I','n','p','u','t','T','y','p','e','s',0
  46 };
  47
  48 static const WCHAR szDMOOutputType[] =
  49 {
  50     'O','u','t','p','u','t','T','y','p','e','s',0
  51 };
  52
  53 static const WCHAR szDMOKeyed[] =
  54 {
  55     'K','e','y','e','d',0
  56 };
  57
  58 static const WCHAR szDMOCategories[] =
  59 {
  60     'C','a','t','e','g','o','r','i','e','s',0
  61 };
  62
  63 static const WCHAR szGUIDFmt[] =
  64 {
  65     '%','0','8','X','-','%','0','4','X','-','%','0','4','X','-','%','0',
  66     '2','X','%','0','2','X','-','%','0','2','X','%','0','2','X','%','0','2',
  67     'X','%','0','2','X','%','0','2','X','%','0','2','X',0
  68 };
  69
  70 static const WCHAR szCat3Fmt[] =
  71 {
  72     '%','s','\\','%','s','\\','%','s',0
  73 };
  74
  75 static const WCHAR szCat2Fmt[] =
  76 {
  77     '%','s','\\','%','s',0
  78 };
  79
  80 static const WCHAR szToGuidFmt[] =
  81 {
  82     '{','%','s','}',0
  83 };
  84
  85
  86 typedef struct
  87 {
  88     const IEnumDMOVtbl         *lpVtbl;
  89     LONG                        ref;
  90     DWORD                       index;
  91     const GUID*                 guidCategory;
  92     DWORD                       dwFlags;
  93     DWORD                       cInTypes;
  94     DMO_PARTIAL_MEDIATYPE       *pInTypes;
  95     DWORD                       cOutTypes;
  96     DMO_PARTIAL_MEDIATYPE       *pOutTypes;
  97     HKEY                        hkey;
  98 } IEnumDMOImpl;
  99
 100 static HRESULT read_types(HKEY root, LPCWSTR key, ULONG *supplied, ULONG requested, DMO_PARTIAL_MEDIATYPE* types);
 101
 102 static const IEnumDMOVtbl edmovt;
 103
 104 static LPWSTR GUIDToString(LPWSTR lpwstr, REFGUID lpcguid)
 105 {
 106     wsprintfW(lpwstr, szGUIDFmt, lpcguid->Data1, lpcguid->Data2,
 107         lpcguid->Data3, lpcguid->Data4[0], lpcguid->Data4[1],
 108         lpcguid->Data4[2], lpcguid->Data4[3], lpcguid->Data4[4],
 109         lpcguid->Data4[5], lpcguid->Data4[6], lpcguid->Data4[7]);
 110
 111     return lpwstr;
 112 }
 113
 114 static BOOL IsMediaTypeEqual(const DMO_PARTIAL_MEDIATYPE* mt1, const DMO_PARTIAL_MEDIATYPE* mt2)
 115 {
 116
 117     return (IsEqualCLSID(&mt1->type, &mt2->type) ||
 118             IsEqualCLSID(&mt2->type, &GUID_NULL) ||
 119             IsEqualCLSID(&mt1->type, &GUID_NULL)) &&
 120             (IsEqualCLSID(&mt1->subtype, &mt2->subtype) ||
 121             IsEqualCLSID(&mt2->subtype, &GUID_NULL) ||
 122             IsEqualCLSID(&mt1->subtype, &GUID_NULL));
 123 }
 124
 125 static HRESULT write_types(HKEY hkey, LPCWSTR name, const DMO_PARTIAL_MEDIATYPE* types, DWORD count)
 126 {
 127     HRESULT hres = S_OK;
 128     if (MSDMO_MAJOR_VERSION > 5)
 129     {
 130         hres = RegSetValueExW(hkey, name, 0, REG_BINARY, (const BYTE*) types,
 131                           count* sizeof(DMO_PARTIAL_MEDIATYPE));
 132     }
 133     else
 134     {
 135         HKEY skey1,skey2,skey3;
 136         DWORD index = 0;
 137         WCHAR szGuidKey[64];
 138
 139         hres = RegCreateKeyExW(hkey, name, 0, NULL, REG_OPTION_NON_VOLATILE,
 140                                KEY_WRITE, NULL, &skey1, NULL);
 141         while (index < count)
 142         {
 143             GUIDToString(szGuidKey,&types[index].type);
 144             hres = RegCreateKeyExW(skey1, szGuidKey, 0, NULL,
 145                         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &skey2, NULL);
 146             GUIDToString(szGuidKey,&types[index].subtype);
 147             hres = RegCreateKeyExW(skey2, szGuidKey, 0, NULL,
 148                         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &skey3, NULL);
 149             RegCloseKey(skey3);
 150             RegCloseKey(skey2);
 151             index ++;
 152         }
 153         RegCloseKey(skey1);
 154     }
 155
 156     return hres;
 157 }
 158
 159 /***************************************************************
 160  * DMORegister (MSDMO.@)
 161  *
 162  * Register a DirectX Media Object.
 163  */
 164 HRESULT WINAPI DMORegister(
 165    LPCWSTR szName,
 166    REFCLSID clsidDMO,
 167    REFGUID guidCategory,
 168    DWORD dwFlags,
 169    DWORD cInTypes,
 170    const DMO_PARTIAL_MEDIATYPE *pInTypes,
 171    DWORD cOutTypes,
 172    const DMO_PARTIAL_MEDIATYPE *pOutTypes
 173 )
 174 {
 175     WCHAR szguid[64];
 176     HRESULT hres;
 177     HKEY hrkey = 0;
 178     HKEY hkey = 0;
 179     HKEY hckey = 0;
 180     HKEY hclskey = 0;
 181
 182     TRACE("%s\n", debugstr_w(szName));
 183
 184     hres = RegCreateKeyExW(HKEY_CLASSES_ROOT, szDMORootKey, 0, NULL,
 185         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hrkey, NULL);
 186     if (ERROR_SUCCESS != hres)
 187         goto lend;
 188
 189     /* Create clsidDMO key under MediaObjects */
 190     hres = RegCreateKeyExW(hrkey, GUIDToString(szguid, clsidDMO), 0, NULL,
 191         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hkey, NULL);
 192     if (ERROR_SUCCESS != hres)
 193         goto lend;
 194
 195     /* Set default Name value */
 196     hres = RegSetValueExW(hkey, NULL, 0, REG_SZ, (const BYTE*) szName,
 197         (strlenW(szName) + 1) * sizeof(WCHAR));
 198
 199     /* Set InputTypes */
 200     hres = write_types(hkey, szDMOInputType, pInTypes, cInTypes);
 201
 202     /* Set OutputTypes */
 203     hres = write_types(hkey, szDMOOutputType, pOutTypes, cOutTypes);
 204
 205     if (dwFlags & DMO_REGISTERF_IS_KEYED)
 206     {
 207         /* Create Keyed key */
 208         hres = RegCreateKeyExW(hkey, szDMOKeyed, 0, NULL,
 209             REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hckey, NULL);
 210         if (ERROR_SUCCESS != hres)
 211             goto lend;
 212         RegCloseKey(hckey);
 213     }
 214
 215     /* Register the category */
 216     hres = RegCreateKeyExW(hrkey, szDMOCategories, 0, NULL,
 217             REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hckey, NULL);
 218     if (ERROR_SUCCESS != hres)
 219         goto lend;
 220
 221     RegCloseKey(hkey);
 222
 223     hres = RegCreateKeyExW(hckey, GUIDToString(szguid, guidCategory), 0, NULL,
 224             REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hkey, NULL);
 225     if (ERROR_SUCCESS != hres)
 226         goto lend;
 227     hres = RegCreateKeyExW(hkey, GUIDToString(szguid, clsidDMO), 0, NULL,
 228         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hclskey, NULL);
 229     if (ERROR_SUCCESS != hres)
 230         goto lend;
 231
 232 lend:
 233     if (hkey)
 234         RegCloseKey(hkey);
 235     if (hckey)
 236         RegCloseKey(hckey);
 237     if (hclskey)
 238         RegCloseKey(hclskey);
 239     if (hrkey)
 240         RegCloseKey(hrkey);
 241
 242     TRACE(" hresult=0x%08x\n", hres);
 243     return hres;
 244 }
 245
 246
 247 /***************************************************************
 248  * DMOUnregister (MSDMO.@)
 249  *
 250  * Unregister a DirectX Media Object.
 251  */
 252 HRESULT WINAPI DMOUnregister(REFCLSID clsidDMO, REFGUID guidCategory)
 253 {
 254     HRESULT hres;
 255     WCHAR szguid[64];
 256     HKEY hrkey = 0;
 257     HKEY hckey = 0;
 258
 259     GUIDToString(szguid, clsidDMO);
 260
 261     TRACE("%s %p\n", debugstr_w(szguid), guidCategory);
 262
 263     hres = RegOpenKeyExW(HKEY_CLASSES_ROOT, szDMORootKey, 0, KEY_WRITE, &hrkey);
 264     if (ERROR_SUCCESS != hres)
 265         goto lend;
 266
 267     hres = RegDeleteKeyW(hrkey, szguid);
 268     if (ERROR_SUCCESS != hres)
 269         goto lend;
 270
 271     hres = RegOpenKeyExW(hrkey, szDMOCategories, 0, KEY_WRITE, &hckey);
 272     if (ERROR_SUCCESS != hres)
 273         goto lend;
 274
 275     hres = RegDeleteKeyW(hckey, szguid);
 276     if (ERROR_SUCCESS != hres)
 277         goto lend;
 278
 279 lend:
 280     if (hckey)
 281         RegCloseKey(hckey);
 282     if (hrkey)
 283         RegCloseKey(hrkey);
 284
 285     return hres;
 286 }
 287
 288
 289 /***************************************************************
 290  * DMOGetName (MSDMO.@)
 291  *
 292  * Get DMP Name from the registry
 293  */
 294 HRESULT WINAPI DMOGetName(REFCLSID clsidDMO, WCHAR szName[])
 295 {
 296     WCHAR szguid[64];
 297     HRESULT hres;
 298     HKEY hrkey = 0;
 299     HKEY hkey = 0;
 300     static const INT max_name_len = 80;
 301     DWORD count;
 302
 303     TRACE("%s\n", debugstr_guid(clsidDMO));
 304
 305     hres = RegOpenKeyExW(HKEY_CLASSES_ROOT, szDMORootKey,
 306         0, KEY_READ, &hrkey);
 307     if (ERROR_SUCCESS != hres)
 308         goto lend;
 309
 310     hres = RegOpenKeyExW(hrkey, GUIDToString(szguid, clsidDMO),
 311         0, KEY_READ, &hkey);
 312     if (ERROR_SUCCESS != hres)
 313         goto lend;
 314
 315     count = max_name_len * sizeof(WCHAR);
 316     hres = RegQueryValueExW(hkey, NULL, NULL, NULL,
 317         (LPBYTE) szName, &count);
 318
 319     TRACE(" szName=%s\n", debugstr_w(szName));
 320 lend:
 321     if (hkey)
 322         RegCloseKey(hrkey);
 323     if (hkey)
 324         RegCloseKey(hkey);
 325
 326     return hres;
 327 }
 328
 329
 330 /**************************************************************************
 331 *   IEnumDMO_Destructor
 332 */
 333 static BOOL IEnumDMO_Destructor(IEnumDMO* iface)
 334 {
 335     IEnumDMOImpl *This = (IEnumDMOImpl *)iface;
 336
 337     TRACE("%p\n", This);
 338
 339     if (This->hkey)
 340         RegCloseKey(This->hkey);
 341
 342     HeapFree(GetProcessHeap(), 0, This->pInTypes);
 343     HeapFree(GetProcessHeap(), 0, This->pOutTypes);
 344
 345     return TRUE;
 346 }
 347
 348
 349 /**************************************************************************
 350  *  IEnumDMO_Constructor
 351  */
 352 static IEnumDMO * IEnumDMO_Constructor(
 353     REFGUID guidCategory,
 354     DWORD dwFlags,
 355     DWORD cInTypes,
 356     const DMO_PARTIAL_MEDIATYPE *pInTypes,
 357     DWORD cOutTypes,
 358     const DMO_PARTIAL_MEDIATYPE *pOutTypes)
 359 {
 360     UINT size;
 361     IEnumDMOImpl* lpedmo;
 362     BOOL ret = FALSE;
 363
 364     lpedmo = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IEnumDMOImpl));
 365
 366     if (lpedmo)
 367     {
 368         lpedmo->ref = 1;
 369         lpedmo->lpVtbl = &edmovt;
 370         lpedmo->index = -1;
 371         lpedmo->guidCategory = guidCategory;
 372         lpedmo->dwFlags = dwFlags;
 373
 374         if (cInTypes > 0)
 375         {
 376             size = cInTypes * sizeof(DMO_PARTIAL_MEDIATYPE);
 377             lpedmo->pInTypes = HeapAlloc(GetProcessHeap(), 0, size);
 378             if (!lpedmo->pInTypes)
 379                 goto lerr;
 380             memcpy(lpedmo->pInTypes, pInTypes, size);
 381             lpedmo->cInTypes = cInTypes;
 382         }
 383
 384         if (cOutTypes > 0)
 385         {
 386             size = cOutTypes * sizeof(DMO_PARTIAL_MEDIATYPE);
 387             lpedmo->pOutTypes = HeapAlloc(GetProcessHeap(), 0, size);
 388             if (!lpedmo->pOutTypes)
 389                 goto lerr;
 390             memcpy(lpedmo->pOutTypes, pOutTypes, size);
 391             lpedmo->cOutTypes = cOutTypes;
 392         }
 393
 394         /* If not filtering by category enum from media objects root */
 395         if (IsEqualGUID(guidCategory, &GUID_NULL))
 396         {
 397             if (ERROR_SUCCESS == RegOpenKeyExW(HKEY_CLASSES_ROOT, szDMORootKey,
 398                 0, KEY_READ, &lpedmo->hkey))
 399                 ret = TRUE;
 400         }
 401         else
 402         {
 403             WCHAR szguid[64];
 404             WCHAR szKey[MAX_PATH];
 405
 406             wsprintfW(szKey, szCat3Fmt, szDMORootKey, szDMOCategories,
 407                 GUIDToString(szguid, guidCategory));
 408             if (ERROR_SUCCESS == RegOpenKeyExW(HKEY_CLASSES_ROOT, szKey,
 409                 0, KEY_READ, &lpedmo->hkey))
 410                 ret = TRUE;
 411         }
 412
 413 lerr:
 414         if(!ret)
 415         {
 416             IEnumDMO_Destructor((IEnumDMO*)lpedmo);
 417             HeapFree(GetProcessHeap(),0,lpedmo);
 418             lpedmo = NULL;
 419         }
 420     }
 421
 422     TRACE("returning %p\n", lpedmo);
 423
 424     return (IEnumDMO*)lpedmo;
 425 }
 426
 427
 428 /******************************************************************************
 429  * IEnumDMO_fnAddRef
 430  */
 431 static ULONG WINAPI IEnumDMO_fnAddRef(IEnumDMO * iface)
 432 {
 433     IEnumDMOImpl *This = (IEnumDMOImpl *)iface;
 434     return InterlockedIncrement(&This->ref);
 435 }
 436
 437
 438 /**************************************************************************
 439  *  EnumDMO_QueryInterface
 440  */
 441 static HRESULT WINAPI IEnumDMO_fnQueryInterface(
 442     IEnumDMO* iface,
 443     REFIID riid,
 444     LPVOID *ppvObj)
 445 {
 446     IEnumDMOImpl *This = (IEnumDMOImpl *)iface;
 447
 448     *ppvObj = NULL;
 449
 450     if(IsEqualIID(riid, &IID_IUnknown))
 451         *ppvObj = This;
 452     else if(IsEqualIID(riid, &IID_IEnumDMO))
 453         *ppvObj = This;
 454
 455     if(*ppvObj)
 456     {
 457         IEnumDMO_fnAddRef(*ppvObj);
 458         return S_OK;
 459     }
 460
 461     return E_NOINTERFACE;
 462 }
 463
 464
 465 /******************************************************************************
 466  * IEnumDMO_fnRelease
 467  */
 468 static ULONG WINAPI IEnumDMO_fnRelease(IEnumDMO * iface)
 469 {
 470     IEnumDMOImpl *This = (IEnumDMOImpl *)iface;
 471     ULONG refCount = InterlockedDecrement(&This->ref);
 472
 473     if (!refCount)
 474     {
 475         IEnumDMO_Destructor((IEnumDMO*)This);
 476         HeapFree(GetProcessHeap(),0,This);
 477     }
 478     return refCount;
 479 }
 480
 481
 482 /******************************************************************************
 483  * IEnumDMO_fnNext
 484  */
 485 static HRESULT WINAPI IEnumDMO_fnNext(
 486     IEnumDMO * iface,
 487     DWORD cItemsToFetch,
 488     CLSID * pCLSID,
 489     WCHAR ** Names,
 490     DWORD * pcItemsFetched)
 491 {
 492     FILETIME ft;
 493     HKEY hkey;
 494     WCHAR szNextKey[MAX_PATH];
 495     WCHAR szGuidKey[64];
 496     WCHAR szKey[MAX_PATH];
 497     WCHAR szValue[MAX_PATH];
 498     DWORD len;
 499     UINT count = 0;
 500     HRESULT hres = S_OK;
 501
 502     IEnumDMOImpl *This = (IEnumDMOImpl *)iface;
 503
 504     TRACE("--> (%p) %d %p %p %p\n", iface, cItemsToFetch, pCLSID, Names, pcItemsFetched);
 505
 506     if (!pCLSID || !Names || !pcItemsFetched)
 507         return E_POINTER;
 508
 509     while (count < cItemsToFetch)
 510     {
 511         This->index++;
 512
 513         len = MAX_PATH;
 514         hres = RegEnumKeyExW(This->hkey, This->index, szNextKey, &len, NULL, NULL, NULL, &ft);
 515         if (hres != ERROR_SUCCESS)
 516             break;
 517
 518         TRACE("found %s\n", debugstr_w(szNextKey));
 519
 520         if (!(This->dwFlags & DMO_ENUMF_INCLUDE_KEYED))
 521         {
 522             wsprintfW(szKey, szCat3Fmt, szDMORootKey, szNextKey, szDMOKeyed);
 523             hres = RegOpenKeyExW(HKEY_CLASSES_ROOT, szKey, 0, KEY_READ, &hkey);
 524             if (ERROR_SUCCESS == hres)
 525             {
 526                 RegCloseKey(hkey);
 527                 /* Skip Keyed entries */
 528                 continue;
 529             }
 530         }
 531
 532         wsprintfW(szKey, szCat2Fmt, szDMORootKey, szNextKey);
 533         hres = RegOpenKeyExW(HKEY_CLASSES_ROOT, szKey, 0, KEY_READ, &hkey);
 534
 535         if (This->pInTypes)
 536         {
 537             UINT i, j;
 538             DWORD cInTypes;
 539             DMO_PARTIAL_MEDIATYPE* pInTypes;
 540
 541             hres = read_types(hkey, szDMOInputType, &cInTypes,
 542                     sizeof(szValue)/sizeof(DMO_PARTIAL_MEDIATYPE),
 543                     (DMO_PARTIAL_MEDIATYPE*)szValue);
 544
 545             if (ERROR_SUCCESS != hres)
 546             {
 547                 RegCloseKey(hkey);
 548                 continue;
 549             }
 550
 551             pInTypes = (DMO_PARTIAL_MEDIATYPE*) szValue;
 552
 553             for (i = 0; i < This->cInTypes; i++)
 554             {
 555                 for (j = 0; j < cInTypes; j++)
 556                 {
 557                     if (IsMediaTypeEqual(&pInTypes[j], &This->pInTypes[i]))
 558                         break;
 559                 }
 560
 561                 if (j >= cInTypes)
 562                     break;
 563             }
 564
 565             if (i < This->cInTypes)
 566             {
 567                 RegCloseKey(hkey);
 568                 continue;
 569             }
 570         }
 571
 572         if (This->pOutTypes)
 573         {
 574             UINT i, j;
 575             DWORD cOutTypes;
 576             DMO_PARTIAL_MEDIATYPE* pOutTypes;
 577
 578             hres = read_types(hkey, szDMOOutputType, &cOutTypes,
 579                     sizeof(szValue)/sizeof(DMO_PARTIAL_MEDIATYPE),
 580                     (DMO_PARTIAL_MEDIATYPE*)szValue);
 581
 582             if (ERROR_SUCCESS != hres)
 583             {
 584                 RegCloseKey(hkey);
 585                 continue;
 586             }
 587
 588             pOutTypes = (DMO_PARTIAL_MEDIATYPE*) szValue;
 589
 590             for (i = 0; i < This->cOutTypes; i++)
 591             {
 592                 for (j = 0; j < cOutTypes; j++)
 593                 {
 594                     if (IsMediaTypeEqual(&pOutTypes[j], &This->pOutTypes[i]))
 595                         break;
 596                 }
 597
 598                 if (j >= cOutTypes)
 599                     break;
 600             }
 601
 602             if (i < This->cOutTypes)
 603             {
 604                 RegCloseKey(hkey);
 605                 continue;
 606             }
 607         }
 608
 609         /* Media object wasn't filtered so add it to return list */
 610         Names[count] = NULL;
 611         len = MAX_PATH * sizeof(WCHAR);
 612         hres = RegQueryValueExW(hkey, NULL, NULL, NULL, (LPBYTE) szValue, &len);
 613         if (ERROR_SUCCESS == hres)
 614         {
 615             Names[count] = HeapAlloc(GetProcessHeap(), 0, strlenW(szValue) + 1);
 616             if (Names[count])
 617                 strcmpW(Names[count], szValue);
 618         }
 619         wsprintfW(szGuidKey,szToGuidFmt,szNextKey);
 620         CLSIDFromString(szGuidKey, &pCLSID[count]);
 621
 622         TRACE("found match %s %s\n", debugstr_w(szValue), debugstr_w(szNextKey));
 623         RegCloseKey(hkey);
 624         count++;
 625     }
 626
 627     *pcItemsFetched = count;
 628     if (*pcItemsFetched < cItemsToFetch)
 629         hres = S_FALSE;
 630
 631     TRACE("<-- %i found\n",count);
 632     return hres;
 633 }
 634
 635
 636 /******************************************************************************
 637  * IEnumDMO_fnSkip
 638  */
 639 static HRESULT WINAPI IEnumDMO_fnSkip(IEnumDMO * iface, DWORD cItemsToSkip)
 640 {
 641     IEnumDMOImpl *This = (IEnumDMOImpl *)iface;
 642
 643     This->index += cItemsToSkip;
 644
 645     return S_OK;
 646 }
 647
 648
 649 /******************************************************************************
 650  * IEnumDMO_fnReset
 651  */
 652 static HRESULT WINAPI IEnumDMO_fnReset(IEnumDMO * iface)
 653 {
 654     IEnumDMOImpl *This = (IEnumDMOImpl *)iface;
 655
 656     This->index = -1;
 657
 658     return S_OK;
 659 }
 660
 661
 662 /******************************************************************************
 663  * IEnumDMO_fnClone
 664  */
 665 static HRESULT WINAPI IEnumDMO_fnClone(IEnumDMO * iface, IEnumDMO **ppEnum)
 666 {
 667     IEnumDMOImpl *This = (IEnumDMOImpl *)iface;
 668
 669     FIXME("(%p)->() to (%p)->() E_NOTIMPL\n", This, ppEnum);
 670
 671   return E_NOTIMPL;
 672 }
 673
 674
 675 /***************************************************************
 676  * DMOEnum (MSDMO.@)
 677  *
 678  * Enumerate DirectX Media Objects in the registry.
 679  */
 680 HRESULT WINAPI DMOEnum(
 681     REFGUID guidCategory,
 682     DWORD dwFlags,
 683     DWORD cInTypes,
 684     const DMO_PARTIAL_MEDIATYPE *pInTypes,
 685     DWORD cOutTypes,
 686     const DMO_PARTIAL_MEDIATYPE *pOutTypes,
 687     IEnumDMO **ppEnum)
 688 {
 689     HRESULT hres = E_FAIL;
 690
 691     TRACE("guidCategory=%p dwFlags=0x%08x cInTypes=%d cOutTypes=%d\n",
 692         guidCategory, dwFlags, cInTypes, cOutTypes);
 693
 694     *ppEnum = IEnumDMO_Constructor(guidCategory, dwFlags, cInTypes,
 695         pInTypes, cOutTypes, pOutTypes);
 696     if (*ppEnum)
 697         hres = S_OK;
 698
 699     return hres;
 700 }
 701
 702
 703 static const IEnumDMOVtbl edmovt =
 704 {
 705         IEnumDMO_fnQueryInterface,
 706         IEnumDMO_fnAddRef,
 707         IEnumDMO_fnRelease,
 708         IEnumDMO_fnNext,
 709         IEnumDMO_fnSkip,
 710         IEnumDMO_fnReset,
 711         IEnumDMO_fnClone,
 712 };
 713
 714
 715 HRESULT read_types(HKEY root, LPCWSTR key, ULONG *supplied, ULONG requested, DMO_PARTIAL_MEDIATYPE* types )
 716 {
 717     HRESULT ret = S_OK;
 718     if (MSDMO_MAJOR_VERSION > 5)
 719     {
 720         DWORD len;
 721         len = requested * sizeof(DMO_PARTIAL_MEDIATYPE);
 722         ret = RegQueryValueExW(root, key, NULL, NULL, (LPBYTE) types, &len);
 723         *supplied = len / sizeof(DMO_PARTIAL_MEDIATYPE);
 724     }
 725     else
 726     {
 727         HKEY hkey;
 728         WCHAR szGuidKey[64];
 729
 730         *supplied = 0;
 731         if (ERROR_SUCCESS == RegOpenKeyExW(root, key, 0, KEY_READ, &hkey))
 732         {
 733           int index = 0;
 734           WCHAR szNextKey[MAX_PATH];
 735           DWORD len;
 736           LONG rc = ERROR_SUCCESS;
 737
 738           while (rc == ERROR_SUCCESS)
 739           {
 740             len = MAX_PATH;
 741             rc = RegEnumKeyExW(hkey, index, szNextKey, &len, NULL, NULL, NULL, NULL);
 742             if (rc == ERROR_SUCCESS)
 743             {
 744               HKEY subk;
 745               int sub_index = 0;
 746               LONG rcs = ERROR_SUCCESS;
 747               WCHAR szSubKey[MAX_PATH];
 748
 749               RegOpenKeyExW(hkey, szNextKey, 0, KEY_READ, &subk);
 750               while (rcs == ERROR_SUCCESS)
 751               {
 752                 len = MAX_PATH;
 753                 rcs = RegEnumKeyExW(subk, sub_index, szSubKey, &len, NULL, NULL, NULL, NULL);
 754                 if (rcs == ERROR_SUCCESS)
 755                 {
 756                   if (*supplied >= requested)
 757                   {
 758                     /* Bailing */
 759                     ret = S_FALSE;
 760                     rc = ERROR_MORE_DATA;
 761                     rcs = ERROR_MORE_DATA;
 762                     break;
 763                   }
 764
 765                   wsprintfW(szGuidKey,szToGuidFmt,szNextKey);
 766                   CLSIDFromString(szGuidKey, &types[*supplied].type);
 767                   wsprintfW(szGuidKey,szToGuidFmt,szSubKey);
 768                   CLSIDFromString(szGuidKey, &types[*supplied].subtype);
 769                   TRACE("Adding type %s subtype %s at index %i\n",
 770                     debugstr_guid(&types[*supplied].type),
 771                     debugstr_guid(&types[*supplied].subtype),
 772                     *supplied);
 773                   (*supplied)++;
 774                 }
 775                 sub_index++;
 776               }
 777               index++;
 778             }
 779           }
 780           RegCloseKey(hkey);
 781         }
 782     }
 783     return ret;
 784 }
 785
 786 /***************************************************************
 787  * DMOGetTypes (MSDMO.@)
 788  */
 789 HRESULT WINAPI DMOGetTypes(REFCLSID clsidDMO,
 790                ULONG ulInputTypesRequested,
 791                ULONG* pulInputTypesSupplied,
 792                DMO_PARTIAL_MEDIATYPE* pInputTypes,
 793                ULONG ulOutputTypesRequested,
 794                ULONG* pulOutputTypesSupplied,
 795                DMO_PARTIAL_MEDIATYPE* pOutputTypes)
 796 {
 797   HKEY root,hkey;
 798   HRESULT ret = S_OK;
 799   WCHAR szguid[64];
 800
 801   TRACE ("(%s,%u,%p,%p,%u,%p,%p),stub!\n", debugstr_guid(clsidDMO),
 802         ulInputTypesRequested, pulInputTypesSupplied, pInputTypes,
 803         ulOutputTypesRequested, pulOutputTypesSupplied, pOutputTypes);
 804
 805   if (ERROR_SUCCESS != RegOpenKeyExW(HKEY_CLASSES_ROOT, szDMORootKey, 0,
 806                                      KEY_READ, &root))
 807     return E_FAIL;
 808
 809   if (ERROR_SUCCESS != RegOpenKeyExW(root,GUIDToString(szguid,clsidDMO) , 0,
 810                                      KEY_READ, &hkey))
 811   {
 812     RegCloseKey(root);
 813     return E_FAIL;
 814   }
 815
 816   if (ulInputTypesRequested > 0)
 817   {
 818     ret = read_types(hkey, szDMOInputType, pulInputTypesSupplied, ulInputTypesRequested, pInputTypes );
 819   }
 820   else
 821     *pulInputTypesSupplied = 0;
 822
 823   if (ulOutputTypesRequested > 0)
 824   {
 825     HRESULT ret2;
 826     ret2 = read_types(hkey, szDMOOutputType, pulOutputTypesSupplied, ulOutputTypesRequested, pOutputTypes );
 827
 828     if (ret == S_OK)
 829         ret = ret2;
 830   }
 831   else
 832     *pulOutputTypesSupplied = 0;
 833
 834   return ret;
 835 }