dlls/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     IEnumDMO                    IEnumDMO_iface;
  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 inline IEnumDMOImpl *impl_from_IEnumDMO(IEnumDMO *iface)
 101 {
 102     return CONTAINING_RECORD(iface, IEnumDMOImpl, IEnumDMO_iface);
 103 }
 104
 105 static HRESULT read_types(HKEY root, LPCWSTR key, ULONG *supplied, ULONG requested, DMO_PARTIAL_MEDIATYPE* types);
 106
 107 static const IEnumDMOVtbl edmovt;
 108
 109 static LPWSTR GUIDToString(LPWSTR lpwstr, REFGUID lpcguid)
 110 {
 111     wsprintfW(lpwstr, szGUIDFmt, lpcguid->Data1, lpcguid->Data2,
 112         lpcguid->Data3, lpcguid->Data4[0], lpcguid->Data4[1],
 113         lpcguid->Data4[2], lpcguid->Data4[3], lpcguid->Data4[4],
 114         lpcguid->Data4[5], lpcguid->Data4[6], lpcguid->Data4[7]);
 115
 116     return lpwstr;
 117 }
 118
 119 static BOOL IsMediaTypeEqual(const DMO_PARTIAL_MEDIATYPE* mt1, const DMO_PARTIAL_MEDIATYPE* mt2)
 120 {
 121
 122     return (IsEqualCLSID(&mt1->type, &mt2->type) ||
 123             IsEqualCLSID(&mt2->type, &GUID_NULL) ||
 124             IsEqualCLSID(&mt1->type, &GUID_NULL)) &&
 125             (IsEqualCLSID(&mt1->subtype, &mt2->subtype) ||
 126             IsEqualCLSID(&mt2->subtype, &GUID_NULL) ||
 127             IsEqualCLSID(&mt1->subtype, &GUID_NULL));
 128 }
 129
 130 static HRESULT write_types(HKEY hkey, LPCWSTR name, const DMO_PARTIAL_MEDIATYPE* types, DWORD count)
 131 {
 132     HRESULT hres = S_OK;
 133     if (MSDMO_MAJOR_VERSION > 5)
 134     {
 135         hres = RegSetValueExW(hkey, name, 0, REG_BINARY, (const BYTE*) types,
 136                           count* sizeof(DMO_PARTIAL_MEDIATYPE));
 137     }
 138     else
 139     {
 140         HKEY skey1,skey2,skey3;
 141         DWORD index = 0;
 142         WCHAR szGuidKey[64];
 143
 144         hres = RegCreateKeyExW(hkey, name, 0, NULL, REG_OPTION_NON_VOLATILE,
 145                                KEY_WRITE, NULL, &skey1, NULL);
 146         while (index < count)
 147         {
 148             GUIDToString(szGuidKey,&types[index].type);
 149             hres = RegCreateKeyExW(skey1, szGuidKey, 0, NULL,
 150                         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &skey2, NULL);
 151             GUIDToString(szGuidKey,&types[index].subtype);
 152             hres = RegCreateKeyExW(skey2, szGuidKey, 0, NULL,
 153                         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &skey3, NULL);
 154             RegCloseKey(skey3);
 155             RegCloseKey(skey2);
 156             index ++;
 157         }
 158         RegCloseKey(skey1);
 159     }
 160
 161     return hres;
 162 }
 163
 164 /***************************************************************
 165  * DMORegister (MSDMO.@)
 166  *
 167  * Register a DirectX Media Object.
 168  */
 169 HRESULT WINAPI DMORegister(
 170    LPCWSTR szName,
 171    REFCLSID clsidDMO,
 172    REFGUID guidCategory,
 173    DWORD dwFlags,
 174    DWORD cInTypes,
 175    const DMO_PARTIAL_MEDIATYPE *pInTypes,
 176    DWORD cOutTypes,
 177    const DMO_PARTIAL_MEDIATYPE *pOutTypes
 178 )
 179 {
 180     WCHAR szguid[64];
 181     HRESULT hres;
 182     HKEY hrkey = 0;
 183     HKEY hkey = 0;
 184     HKEY hckey = 0;
 185     HKEY hclskey = 0;
 186
 187     TRACE("%s\n", debugstr_w(szName));
 188
 189     hres = RegCreateKeyExW(HKEY_CLASSES_ROOT, szDMORootKey, 0, NULL,
 190         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hrkey, NULL);
 191     if (ERROR_SUCCESS != hres)
 192         goto lend;
 193
 194     /* Create clsidDMO key under MediaObjects */
 195     hres = RegCreateKeyExW(hrkey, GUIDToString(szguid, clsidDMO), 0, NULL,
 196         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hkey, NULL);
 197     if (ERROR_SUCCESS != hres)
 198         goto lend;
 199
 200     /* Set default Name value */
 201     hres = RegSetValueExW(hkey, NULL, 0, REG_SZ, (const BYTE*) szName,
 202         (strlenW(szName) + 1) * sizeof(WCHAR));
 203
 204     /* Set InputTypes */
 205     hres = write_types(hkey, szDMOInputType, pInTypes, cInTypes);
 206
 207     /* Set OutputTypes */
 208     hres = write_types(hkey, szDMOOutputType, pOutTypes, cOutTypes);
 209
 210     if (dwFlags & DMO_REGISTERF_IS_KEYED)
 211     {
 212         /* Create Keyed key */
 213         hres = RegCreateKeyExW(hkey, szDMOKeyed, 0, NULL,
 214             REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hckey, NULL);
 215         if (ERROR_SUCCESS != hres)
 216             goto lend;
 217         RegCloseKey(hckey);
 218     }
 219
 220     /* Register the category */
 221     hres = RegCreateKeyExW(hrkey, szDMOCategories, 0, NULL,
 222             REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hckey, NULL);
 223     if (ERROR_SUCCESS != hres)
 224         goto lend;
 225
 226     RegCloseKey(hkey);
 227
 228     hres = RegCreateKeyExW(hckey, GUIDToString(szguid, guidCategory), 0, NULL,
 229             REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hkey, NULL);
 230     if (ERROR_SUCCESS != hres)
 231         goto lend;
 232     hres = RegCreateKeyExW(hkey, GUIDToString(szguid, clsidDMO), 0, NULL,
 233         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hclskey, NULL);
 234     if (ERROR_SUCCESS != hres)
 235         goto lend;
 236
 237 lend:
 238     if (hkey)
 239         RegCloseKey(hkey);
 240     if (hckey)
 241         RegCloseKey(hckey);
 242     if (hclskey)
 243         RegCloseKey(hclskey);
 244     if (hrkey)
 245         RegCloseKey(hrkey);
 246
 247     TRACE(" hresult=0x%08x\n", hres);
 248     return hres;
 249 }
 250
 251
 252 /***************************************************************
 253  * DMOUnregister (MSDMO.@)
 254  *
 255  * Unregister a DirectX Media Object.
 256  */
 257 HRESULT WINAPI DMOUnregister(REFCLSID clsidDMO, REFGUID guidCategory)
 258 {
 259     HRESULT hres;
 260     WCHAR szguid[64];
 261     HKEY hrkey = 0;
 262     HKEY hckey = 0;
 263
 264     GUIDToString(szguid, clsidDMO);
 265
 266     TRACE("%s %p\n", debugstr_w(szguid), guidCategory);
 267
 268     hres = RegOpenKeyExW(HKEY_CLASSES_ROOT, szDMORootKey, 0, KEY_WRITE, &hrkey);
 269     if (ERROR_SUCCESS != hres)
 270         goto lend;
 271
 272     hres = RegDeleteKeyW(hrkey, szguid);
 273     if (ERROR_SUCCESS != hres)
 274         goto lend;
 275
 276     hres = RegOpenKeyExW(hrkey, szDMOCategories, 0, KEY_WRITE, &hckey);
 277     if (ERROR_SUCCESS != hres)
 278         goto lend;
 279
 280     hres = RegDeleteKeyW(hckey, szguid);
 281     if (ERROR_SUCCESS != hres)
 282         goto lend;
 283
 284 lend:
 285     if (hckey)
 286         RegCloseKey(hckey);
 287     if (hrkey)
 288         RegCloseKey(hrkey);
 289
 290     return hres;
 291 }
 292
 293
 294 /***************************************************************
 295  * DMOGetName (MSDMO.@)
 296  *
 297  * Get DMP Name from the registry
 298  */
 299 HRESULT WINAPI DMOGetName(REFCLSID clsidDMO, WCHAR szName[])
 300 {
 301     WCHAR szguid[64];
 302     HRESULT hres;
 303     HKEY hrkey = 0;
 304     HKEY hkey = 0;
 305     static const INT max_name_len = 80;
 306     DWORD count;
 307
 308     TRACE("%s\n", debugstr_guid(clsidDMO));
 309
 310     hres = RegOpenKeyExW(HKEY_CLASSES_ROOT, szDMORootKey,
 311         0, KEY_READ, &hrkey);
 312     if (ERROR_SUCCESS != hres)
 313         goto lend;
 314
 315     hres = RegOpenKeyExW(hrkey, GUIDToString(szguid, clsidDMO),
 316         0, KEY_READ, &hkey);
 317     if (ERROR_SUCCESS != hres)
 318         goto lend;
 319
 320     count = max_name_len * sizeof(WCHAR);
 321     hres = RegQueryValueExW(hkey, NULL, NULL, NULL,
 322         (LPBYTE) szName, &count);
 323
 324     TRACE(" szName=%s\n", debugstr_w(szName));
 325 lend:
 326     if (hkey)
 327         RegCloseKey(hrkey);
 328     if (hkey)
 329         RegCloseKey(hkey);
 330
 331     return hres;
 332 }
 333
 334
 335 /**************************************************************************
 336 *   IEnumDMOImpl_Destructor
 337 */
 338 static BOOL IEnumDMOImpl_Destructor(IEnumDMOImpl* This)
 339 {
 340     TRACE("%p\n", This);
 341
 342     if (This->hkey)
 343         RegCloseKey(This->hkey);
 344
 345     HeapFree(GetProcessHeap(), 0, This->pInTypes);
 346     HeapFree(GetProcessHeap(), 0, This->pOutTypes);
 347
 348     return TRUE;
 349 }
 350
 351
 352 /**************************************************************************
 353  *  IEnumDMO_Constructor
 354  */
 355 static IEnumDMO * IEnumDMO_Constructor(
 356     REFGUID guidCategory,
 357     DWORD dwFlags,
 358     DWORD cInTypes,
 359     const DMO_PARTIAL_MEDIATYPE *pInTypes,
 360     DWORD cOutTypes,
 361     const DMO_PARTIAL_MEDIATYPE *pOutTypes)
 362 {
 363     UINT size;
 364     IEnumDMOImpl* lpedmo;
 365     BOOL ret = FALSE;
 366
 367     lpedmo = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IEnumDMOImpl));
 368
 369     if (lpedmo)
 370     {
 371         lpedmo->ref = 1;
 372         lpedmo->IEnumDMO_iface.lpVtbl = &edmovt;
 373         lpedmo->index = -1;
 374         lpedmo->guidCategory = guidCategory;
 375         lpedmo->dwFlags = dwFlags;
 376
 377         if (cInTypes > 0)
 378         {
 379             size = cInTypes * sizeof(DMO_PARTIAL_MEDIATYPE);
 380             lpedmo->pInTypes = HeapAlloc(GetProcessHeap(), 0, size);
 381             if (!lpedmo->pInTypes)
 382                 goto lerr;
 383             memcpy(lpedmo->pInTypes, pInTypes, size);
 384             lpedmo->cInTypes = cInTypes;
 385         }
 386
 387         if (cOutTypes > 0)
 388         {
 389             size = cOutTypes * sizeof(DMO_PARTIAL_MEDIATYPE);
 390             lpedmo->pOutTypes = HeapAlloc(GetProcessHeap(), 0, size);
 391             if (!lpedmo->pOutTypes)
 392                 goto lerr;
 393             memcpy(lpedmo->pOutTypes, pOutTypes, size);
 394             lpedmo->cOutTypes = cOutTypes;
 395         }
 396
 397         /* If not filtering by category enum from media objects root */
 398         if (IsEqualGUID(guidCategory, &GUID_NULL))
 399         {
 400             if (ERROR_SUCCESS == RegOpenKeyExW(HKEY_CLASSES_ROOT, szDMORootKey,
 401                 0, KEY_READ, &lpedmo->hkey))
 402                 ret = TRUE;
 403         }
 404         else
 405         {
 406             WCHAR szguid[64];
 407             WCHAR szKey[MAX_PATH];
 408
 409             wsprintfW(szKey, szCat3Fmt, szDMORootKey, szDMOCategories,
 410                 GUIDToString(szguid, guidCategory));
 411             if (ERROR_SUCCESS == RegOpenKeyExW(HKEY_CLASSES_ROOT, szKey,
 412                 0, KEY_READ, &lpedmo->hkey))
 413                 ret = TRUE;
 414         }
 415
 416 lerr:
 417         if(!ret)
 418         {
 419             IEnumDMOImpl_Destructor(lpedmo);
 420             HeapFree(GetProcessHeap(),0,lpedmo);
 421             lpedmo = NULL;
 422         }
 423     }
 424
 425     TRACE("returning %p\n", lpedmo);
 426
 427     return (IEnumDMO*)lpedmo;
 428 }
 429
 430
 431 /******************************************************************************
 432  * IEnumDMO_fnAddRef
 433  */
 434 static ULONG WINAPI IEnumDMO_fnAddRef(IEnumDMO * iface)
 435 {
 436     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 437     return InterlockedIncrement(&This->ref);
 438 }
 439
 440
 441 /**************************************************************************
 442  *  EnumDMO_QueryInterface
 443  */
 444 static HRESULT WINAPI IEnumDMO_fnQueryInterface(
 445     IEnumDMO* iface,
 446     REFIID riid,
 447     LPVOID *ppvObj)
 448 {
 449     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 450
 451     *ppvObj = NULL;
 452
 453     if(IsEqualIID(riid, &IID_IUnknown))
 454         *ppvObj = This;
 455     else if(IsEqualIID(riid, &IID_IEnumDMO))
 456         *ppvObj = This;
 457
 458     if(*ppvObj)
 459     {
 460         IEnumDMO_fnAddRef(*ppvObj);
 461         return S_OK;
 462     }
 463
 464     return E_NOINTERFACE;
 465 }
 466
 467
 468 /******************************************************************************
 469  * IEnumDMO_fnRelease
 470  */
 471 static ULONG WINAPI IEnumDMO_fnRelease(IEnumDMO * iface)
 472 {
 473     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 474     ULONG refCount = InterlockedDecrement(&This->ref);
 475
 476     if (!refCount)
 477     {
 478         IEnumDMOImpl_Destructor(This);
 479         HeapFree(GetProcessHeap(),0,This);
 480     }
 481     return refCount;
 482 }
 483
 484
 485 /******************************************************************************
 486  * IEnumDMO_fnNext
 487  */
 488 static HRESULT WINAPI IEnumDMO_fnNext(
 489     IEnumDMO * iface,
 490     DWORD cItemsToFetch,
 491     CLSID * pCLSID,
 492     WCHAR ** Names,
 493     DWORD * pcItemsFetched)
 494 {
 495     FILETIME ft;
 496     HKEY hkey;
 497     WCHAR szNextKey[MAX_PATH];
 498     WCHAR szGuidKey[64];
 499     WCHAR szKey[MAX_PATH];
 500     WCHAR szValue[MAX_PATH];
 501     DWORD len;
 502     UINT count = 0;
 503     HRESULT hres = S_OK;
 504
 505     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 506
 507     TRACE("--> (%p) %d %p %p %p\n", iface, cItemsToFetch, pCLSID, Names, pcItemsFetched);
 508
 509     if (!pCLSID || !Names || !pcItemsFetched)
 510         return E_POINTER;
 511
 512     while (count < cItemsToFetch)
 513     {
 514         This->index++;
 515
 516         len = MAX_PATH;
 517         hres = RegEnumKeyExW(This->hkey, This->index, szNextKey, &len, NULL, NULL, NULL, &ft);
 518         if (hres != ERROR_SUCCESS)
 519             break;
 520
 521         TRACE("found %s\n", debugstr_w(szNextKey));
 522
 523         if (!(This->dwFlags & DMO_ENUMF_INCLUDE_KEYED))
 524         {
 525             wsprintfW(szKey, szCat3Fmt, szDMORootKey, szNextKey, szDMOKeyed);
 526             hres = RegOpenKeyExW(HKEY_CLASSES_ROOT, szKey, 0, KEY_READ, &hkey);
 527             if (ERROR_SUCCESS == hres)
 528             {
 529                 RegCloseKey(hkey);
 530                 /* Skip Keyed entries */
 531                 continue;
 532             }
 533         }
 534
 535         wsprintfW(szKey, szCat2Fmt, szDMORootKey, szNextKey);
 536         hres = RegOpenKeyExW(HKEY_CLASSES_ROOT, szKey, 0, KEY_READ, &hkey);
 537
 538         if (This->pInTypes)
 539         {
 540             UINT i, j;
 541             DWORD cInTypes;
 542             DMO_PARTIAL_MEDIATYPE* pInTypes;
 543
 544             hres = read_types(hkey, szDMOInputType, &cInTypes,
 545                     sizeof(szValue)/sizeof(DMO_PARTIAL_MEDIATYPE),
 546                     (DMO_PARTIAL_MEDIATYPE*)szValue);
 547
 548             if (ERROR_SUCCESS != hres)
 549             {
 550                 RegCloseKey(hkey);
 551                 continue;
 552             }
 553
 554             pInTypes = (DMO_PARTIAL_MEDIATYPE*) szValue;
 555
 556             for (i = 0; i < This->cInTypes; i++)
 557             {
 558                 for (j = 0; j < cInTypes; j++)
 559                 {
 560                     if (IsMediaTypeEqual(&pInTypes[j], &This->pInTypes[i]))
 561                         break;
 562                 }
 563
 564                 if (j >= cInTypes)
 565                     break;
 566             }
 567
 568             if (i < This->cInTypes)
 569             {
 570                 RegCloseKey(hkey);
 571                 continue;
 572             }
 573         }
 574
 575         if (This->pOutTypes)
 576         {
 577             UINT i, j;
 578             DWORD cOutTypes;
 579             DMO_PARTIAL_MEDIATYPE* pOutTypes;
 580
 581             hres = read_types(hkey, szDMOOutputType, &cOutTypes,
 582                     sizeof(szValue)/sizeof(DMO_PARTIAL_MEDIATYPE),
 583                     (DMO_PARTIAL_MEDIATYPE*)szValue);
 584
 585             if (ERROR_SUCCESS != hres)
 586             {
 587                 RegCloseKey(hkey);
 588                 continue;
 589             }
 590
 591             pOutTypes = (DMO_PARTIAL_MEDIATYPE*) szValue;
 592
 593             for (i = 0; i < This->cOutTypes; i++)
 594             {
 595                 for (j = 0; j < cOutTypes; j++)
 596                 {
 597                     if (IsMediaTypeEqual(&pOutTypes[j], &This->pOutTypes[i]))
 598                         break;
 599                 }
 600
 601                 if (j >= cOutTypes)
 602                     break;
 603             }
 604
 605             if (i < This->cOutTypes)
 606             {
 607                 RegCloseKey(hkey);
 608                 continue;
 609             }
 610         }
 611
 612         /* Media object wasn't filtered so add it to return list */
 613         Names[count] = NULL;
 614         len = MAX_PATH * sizeof(WCHAR);
 615         hres = RegQueryValueExW(hkey, NULL, NULL, NULL, (LPBYTE) szValue, &len);
 616         if (ERROR_SUCCESS == hres)
 617         {
 618             Names[count] = HeapAlloc(GetProcessHeap(), 0, (strlenW(szValue) + 1) * sizeof(WCHAR));
 619             if (Names[count])
 620                 strcpyW(Names[count], szValue);
 621         }
 622         wsprintfW(szGuidKey,szToGuidFmt,szNextKey);
 623         CLSIDFromString(szGuidKey, &pCLSID[count]);
 624
 625         TRACE("found match %s %s\n", debugstr_w(szValue), debugstr_w(szNextKey));
 626         RegCloseKey(hkey);
 627         count++;
 628     }
 629
 630     *pcItemsFetched = count;
 631     if (*pcItemsFetched < cItemsToFetch)
 632         hres = S_FALSE;
 633
 634     TRACE("<-- %i found\n",count);
 635     return hres;
 636 }
 637
 638
 639 /******************************************************************************
 640  * IEnumDMO_fnSkip
 641  */
 642 static HRESULT WINAPI IEnumDMO_fnSkip(IEnumDMO * iface, DWORD cItemsToSkip)
 643 {
 644     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 645
 646     This->index += cItemsToSkip;
 647
 648     return S_OK;
 649 }
 650
 651
 652 /******************************************************************************
 653  * IEnumDMO_fnReset
 654  */
 655 static HRESULT WINAPI IEnumDMO_fnReset(IEnumDMO * iface)
 656 {
 657     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 658
 659     This->index = -1;
 660
 661     return S_OK;
 662 }
 663
 664
 665 /******************************************************************************
 666  * IEnumDMO_fnClone
 667  */
 668 static HRESULT WINAPI IEnumDMO_fnClone(IEnumDMO * iface, IEnumDMO **ppEnum)
 669 {
 670     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 671
 672     FIXME("(%p)->() to (%p)->() E_NOTIMPL\n", This, ppEnum);
 673
 674   return E_NOTIMPL;
 675 }
 676
 677
 678 /***************************************************************
 679  * DMOEnum (MSDMO.@)
 680  *
 681  * Enumerate DirectX Media Objects in the registry.
 682  */
 683 HRESULT WINAPI DMOEnum(
 684     REFGUID guidCategory,
 685     DWORD dwFlags,
 686     DWORD cInTypes,
 687     const DMO_PARTIAL_MEDIATYPE *pInTypes,
 688     DWORD cOutTypes,
 689     const DMO_PARTIAL_MEDIATYPE *pOutTypes,
 690     IEnumDMO **ppEnum)
 691 {
 692     HRESULT hres = E_FAIL;
 693
 694     TRACE("guidCategory=%p dwFlags=0x%08x cInTypes=%d cOutTypes=%d\n",
 695         guidCategory, dwFlags, cInTypes, cOutTypes);
 696
 697     *ppEnum = IEnumDMO_Constructor(guidCategory, dwFlags, cInTypes,
 698         pInTypes, cOutTypes, pOutTypes);
 699     if (*ppEnum)
 700         hres = S_OK;
 701
 702     return hres;
 703 }
 704
 705
 706 static const IEnumDMOVtbl edmovt =
 707 {
 708         IEnumDMO_fnQueryInterface,
 709         IEnumDMO_fnAddRef,
 710         IEnumDMO_fnRelease,
 711         IEnumDMO_fnNext,
 712         IEnumDMO_fnSkip,
 713         IEnumDMO_fnReset,
 714         IEnumDMO_fnClone,
 715 };
 716
 717
 718 HRESULT read_types(HKEY root, LPCWSTR key, ULONG *supplied, ULONG requested, DMO_PARTIAL_MEDIATYPE* types )
 719 {
 720     HRESULT ret = S_OK;
 721     if (MSDMO_MAJOR_VERSION > 5)
 722     {
 723         DWORD len;
 724         len = requested * sizeof(DMO_PARTIAL_MEDIATYPE);
 725         ret = RegQueryValueExW(root, key, NULL, NULL, (LPBYTE) types, &len);
 726         *supplied = len / sizeof(DMO_PARTIAL_MEDIATYPE);
 727     }
 728     else
 729     {
 730         HKEY hkey;
 731         WCHAR szGuidKey[64];
 732
 733         *supplied = 0;
 734         if (ERROR_SUCCESS == RegOpenKeyExW(root, key, 0, KEY_READ, &hkey))
 735         {
 736           int index = 0;
 737           WCHAR szNextKey[MAX_PATH];
 738           DWORD len;
 739           LONG rc = ERROR_SUCCESS;
 740
 741           while (rc == ERROR_SUCCESS)
 742           {
 743             len = MAX_PATH;
 744             rc = RegEnumKeyExW(hkey, index, szNextKey, &len, NULL, NULL, NULL, NULL);
 745             if (rc == ERROR_SUCCESS)
 746             {
 747               HKEY subk;
 748               int sub_index = 0;
 749               LONG rcs = ERROR_SUCCESS;
 750               WCHAR szSubKey[MAX_PATH];
 751
 752               RegOpenKeyExW(hkey, szNextKey, 0, KEY_READ, &subk);
 753               while (rcs == ERROR_SUCCESS)
 754               {
 755                 len = MAX_PATH;
 756                 rcs = RegEnumKeyExW(subk, sub_index, szSubKey, &len, NULL, NULL, NULL, NULL);
 757                 if (rcs == ERROR_SUCCESS)
 758                 {
 759                   if (*supplied >= requested)
 760                   {
 761                     /* Bailing */
 762                     ret = S_FALSE;
 763                     rc = ERROR_MORE_DATA;
 764                     rcs = ERROR_MORE_DATA;
 765                     break;
 766                   }
 767
 768                   wsprintfW(szGuidKey,szToGuidFmt,szNextKey);
 769                   CLSIDFromString(szGuidKey, &types[*supplied].type);
 770                   wsprintfW(szGuidKey,szToGuidFmt,szSubKey);
 771                   CLSIDFromString(szGuidKey, &types[*supplied].subtype);
 772                   TRACE("Adding type %s subtype %s at index %i\n",
 773                     debugstr_guid(&types[*supplied].type),
 774                     debugstr_guid(&types[*supplied].subtype),
 775                     *supplied);
 776                   (*supplied)++;
 777                 }
 778                 sub_index++;
 779               }
 780               index++;
 781             }
 782           }
 783           RegCloseKey(hkey);
 784         }
 785     }
 786     return ret;
 787 }
 788
 789 /***************************************************************
 790  * DMOGetTypes (MSDMO.@)
 791  */
 792 HRESULT WINAPI DMOGetTypes(REFCLSID clsidDMO,
 793                ULONG ulInputTypesRequested,
 794                ULONG* pulInputTypesSupplied,
 795                DMO_PARTIAL_MEDIATYPE* pInputTypes,
 796                ULONG ulOutputTypesRequested,
 797                ULONG* pulOutputTypesSupplied,
 798                DMO_PARTIAL_MEDIATYPE* pOutputTypes)
 799 {
 800   HKEY root,hkey;
 801   HRESULT ret = S_OK;
 802   WCHAR szguid[64];
 803
 804   TRACE ("(%s,%u,%p,%p,%u,%p,%p)\n", debugstr_guid(clsidDMO), ulInputTypesRequested,
 805         pulInputTypesSupplied, pInputTypes, ulOutputTypesRequested, pulOutputTypesSupplied,
 806         pOutputTypes);
 807
 808   if (ERROR_SUCCESS != RegOpenKeyExW(HKEY_CLASSES_ROOT, szDMORootKey, 0,
 809                                      KEY_READ, &root))
 810     return E_FAIL;
 811
 812   if (ERROR_SUCCESS != RegOpenKeyExW(root,GUIDToString(szguid,clsidDMO) , 0,
 813                                      KEY_READ, &hkey))
 814   {
 815     RegCloseKey(root);
 816     return E_FAIL;
 817   }
 818
 819   if (ulInputTypesRequested > 0)
 820   {
 821     ret = read_types(hkey, szDMOInputType, pulInputTypesSupplied, ulInputTypesRequested, pInputTypes );
 822   }
 823   else
 824     *pulInputTypesSupplied = 0;
 825
 826   if (ulOutputTypesRequested > 0)
 827   {
 828     HRESULT ret2;
 829     ret2 = read_types(hkey, szDMOOutputType, pulOutputTypesSupplied, ulOutputTypesRequested, pOutputTypes );
 830
 831     if (ret == S_OK)
 832         ret = ret2;
 833   }
 834   else
 835     *pulOutputTypesSupplied = 0;
 836
 837   return ret;
 838 }