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 #define COBJMACROS
  23
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "winuser.h"
  27 #include "winerror.h"
  28 #include "winreg.h"
  29 #include "objbase.h"
  30 #include "wine/debug.h"
  31 #include "dmo.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(msdmo);
  34
  35 BOOL array_reserve(void **elements, unsigned int *capacity, unsigned int count, unsigned int size)
  36 {
  37     unsigned int max_capacity, new_capacity;
  38     void *new_elements;
  39
  40     if (count <= *capacity)
  41         return TRUE;
  42
  43     max_capacity = ~0u / size;
  44     if (count > max_capacity)
  45         return FALSE;
  46
  47     new_capacity = max(8, *capacity);
  48     while (new_capacity < count && new_capacity <= max_capacity / 2)
  49         new_capacity *= 2;
  50     if (new_capacity < count)
  51         new_capacity = count;
  52
  53     if (!(new_elements = realloc(*elements, new_capacity * size)))
  54     {
  55         ERR("Failed to allocate memory.\n");
  56         return FALSE;
  57     }
  58
  59     *elements = new_elements;
  60     *capacity = new_capacity;
  61     return TRUE;
  62 }
  63
  64 typedef struct
  65 {
  66     IEnumDMO                    IEnumDMO_iface;
  67     LONG                        ref;
  68     DWORD                       index;
  69     GUID                        category;
  70     DWORD                       dwFlags;
  71     DWORD                       cInTypes;
  72     DMO_PARTIAL_MEDIATYPE       *pInTypes;
  73     DWORD                       cOutTypes;
  74     DMO_PARTIAL_MEDIATYPE       *pOutTypes;
  75     HKEY                        hkey;
  76 } IEnumDMOImpl;
  77
  78 static inline IEnumDMOImpl *impl_from_IEnumDMO(IEnumDMO *iface)
  79 {
  80     return CONTAINING_RECORD(iface, IEnumDMOImpl, IEnumDMO_iface);
  81 }
  82
  83 static const IEnumDMOVtbl edmovt;
  84
  85 static const WCHAR *GUIDToString(WCHAR *string, const GUID *guid)
  86 {
  87     swprintf(string, 37, L"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X",
  88             guid->Data1, guid->Data2, guid->Data3,
  89             guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3],
  90             guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7]);
  91     return string;
  92 }
  93
  94 static HRESULT string_to_guid(const WCHAR *string, GUID *guid)
  95 {
  96     WCHAR buffer[39];
  97     buffer[0] = '{';
  98     wcscpy(buffer + 1, string);
  99     buffer[37] = '}';
 100     buffer[38] = 0;
 101     return CLSIDFromString(buffer, guid);
 102 }
 103
 104 static BOOL IsMediaTypeEqual(const DMO_PARTIAL_MEDIATYPE* mt1, const DMO_PARTIAL_MEDIATYPE* mt2)
 105 {
 106
 107     return (IsEqualCLSID(&mt1->type, &mt2->type) ||
 108             IsEqualCLSID(&mt2->type, &GUID_NULL) ||
 109             IsEqualCLSID(&mt1->type, &GUID_NULL)) &&
 110             (IsEqualCLSID(&mt1->subtype, &mt2->subtype) ||
 111             IsEqualCLSID(&mt2->subtype, &GUID_NULL) ||
 112             IsEqualCLSID(&mt1->subtype, &GUID_NULL));
 113 }
 114
 115 static HRESULT write_types(HKEY hkey, LPCWSTR name, const DMO_PARTIAL_MEDIATYPE* types, DWORD count)
 116 {
 117     return HRESULT_FROM_WIN32(RegSetValueExW(hkey, name, 0, REG_BINARY,
 118             (const BYTE *)types, count * sizeof(DMO_PARTIAL_MEDIATYPE)));
 119 }
 120
 121 /***************************************************************
 122  * DMORegister (MSDMO.@)
 123  *
 124  * Register a DirectX Media Object.
 125  */
 126 HRESULT WINAPI DMORegister(
 127    LPCWSTR szName,
 128    REFCLSID clsidDMO,
 129    REFGUID guidCategory,
 130    DWORD dwFlags,
 131    DWORD cInTypes,
 132    const DMO_PARTIAL_MEDIATYPE *pInTypes,
 133    DWORD cOutTypes,
 134    const DMO_PARTIAL_MEDIATYPE *pOutTypes
 135 )
 136 {
 137     WCHAR szguid[64];
 138     HRESULT hres;
 139     HKEY hrkey = 0;
 140     HKEY hkey = 0;
 141     HKEY hckey = 0;
 142     HKEY hclskey = 0;
 143     LONG ret;
 144
 145     TRACE("%s %s %s\n", debugstr_w(szName), debugstr_guid(clsidDMO), debugstr_guid(guidCategory));
 146
 147     if (IsEqualGUID(guidCategory, &GUID_NULL))
 148         return E_INVALIDARG;
 149
 150     ret = RegCreateKeyExW(HKEY_CLASSES_ROOT, L"DirectShow\\MediaObjects", 0,
 151             NULL, 0, KEY_WRITE, NULL, &hrkey, NULL);
 152     if (ret)
 153         return E_FAIL;
 154
 155     /* Create clsidDMO key under MediaObjects */
 156     ret = RegCreateKeyExW(hrkey, GUIDToString(szguid, clsidDMO), 0, NULL,
 157         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hkey, NULL);
 158     if (ret)
 159         goto lend;
 160
 161     /* Set default Name value */
 162     ret = RegSetValueExW(hkey, NULL, 0, REG_SZ, (const BYTE*) szName,
 163         (wcslen(szName) + 1) * sizeof(WCHAR));
 164
 165     /* Set InputTypes */
 166     hres = write_types(hkey, L"InputTypes", pInTypes, cInTypes);
 167
 168     /* Set OutputTypes */
 169     hres = write_types(hkey, L"OutputTypes", pOutTypes, cOutTypes);
 170
 171     if (dwFlags & DMO_REGISTERF_IS_KEYED)
 172     {
 173         /* Create Keyed key */
 174         ret = RegCreateKeyExW(hkey, L"Keyed", 0, NULL, 0, KEY_WRITE, NULL, &hckey, NULL);
 175         if (ret)
 176             goto lend;
 177         RegCloseKey(hckey);
 178     }
 179
 180     /* Register the category */
 181     ret = RegCreateKeyExW(hrkey, L"Categories", 0, NULL, 0, KEY_WRITE, NULL, &hckey, NULL);
 182     if (ret)
 183         goto lend;
 184
 185     RegCloseKey(hkey);
 186
 187     ret = RegCreateKeyExW(hckey, GUIDToString(szguid, guidCategory), 0, NULL,
 188             REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hkey, NULL);
 189     if (ret)
 190         goto lend;
 191     ret = RegCreateKeyExW(hkey, GUIDToString(szguid, clsidDMO), 0, NULL,
 192         REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hclskey, NULL);
 193     if (ret)
 194         goto lend;
 195
 196 lend:
 197     if (hkey)
 198         RegCloseKey(hkey);
 199     if (hckey)
 200         RegCloseKey(hckey);
 201     if (hclskey)
 202         RegCloseKey(hclskey);
 203     if (hrkey)
 204         RegCloseKey(hrkey);
 205
 206     hres = HRESULT_FROM_WIN32(ret);
 207     TRACE(" hresult=0x%08lx\n", hres);
 208     return hres;
 209 }
 210
 211 static HRESULT unregister_dmo_from_category(const WCHAR *dmoW, const WCHAR *catW, HKEY categories)
 212 {
 213     HKEY catkey;
 214     LONG ret;
 215
 216     ret = RegOpenKeyExW(categories, catW, 0, KEY_WRITE, &catkey);
 217     if (!ret)
 218     {
 219         ret = RegDeleteKeyW(catkey, dmoW);
 220         RegCloseKey(catkey);
 221     }
 222
 223     return !ret ? S_OK : S_FALSE;
 224 }
 225
 226 /***************************************************************
 227  * DMOUnregister (MSDMO.@)
 228  *
 229  * Unregister a DirectX Media Object.
 230  */
 231 HRESULT WINAPI DMOUnregister(REFCLSID dmo, REFGUID category)
 232 {
 233     HKEY rootkey = 0, categorieskey = 0;
 234     WCHAR dmoW[64], catW[64];
 235     HRESULT hr = S_FALSE;
 236     LONG ret;
 237
 238     TRACE("%s %s\n", debugstr_guid(dmo), debugstr_guid(category));
 239
 240     if (RegOpenKeyExW(HKEY_CLASSES_ROOT, L"DirectShow\\MediaObjects", 0, KEY_WRITE, &rootkey))
 241         return S_FALSE;
 242
 243     GUIDToString(dmoW, dmo);
 244     RegDeleteKeyW(rootkey, dmoW);
 245
 246     /* open 'Categories' */
 247     ret = RegOpenKeyExW(rootkey, L"Categories", 0, KEY_WRITE|KEY_ENUMERATE_SUB_KEYS, &categorieskey);
 248     RegCloseKey(rootkey);
 249     if (ret)
 250     {
 251         hr = HRESULT_FROM_WIN32(ret);
 252         goto lend;
 253     }
 254
 255     /* remove from all categories */
 256     if (IsEqualGUID(category, &GUID_NULL))
 257     {
 258         DWORD index = 0, len = ARRAY_SIZE(catW);
 259
 260         while (!RegEnumKeyExW(categorieskey, index++, catW, &len, NULL, NULL, NULL, NULL))
 261             hr = unregister_dmo_from_category(dmoW, catW, categorieskey);
 262     }
 263     else
 264     {
 265         GUIDToString(catW, category);
 266         hr = unregister_dmo_from_category(dmoW, catW, categorieskey);
 267     }
 268
 269 lend:
 270     if (categorieskey)
 271         RegCloseKey(categorieskey);
 272
 273     return hr;
 274 }
 275
 276
 277 /***************************************************************
 278  * DMOGetName (MSDMO.@)
 279  *
 280  * Get DMO Name from the registry
 281  */
 282 HRESULT WINAPI DMOGetName(REFCLSID clsidDMO, WCHAR name[80])
 283 {
 284     static const INT max_name_len = 80*sizeof(WCHAR);
 285     DWORD count = max_name_len;
 286     WCHAR szguid[64];
 287     HKEY hrkey, hkey;
 288     LONG ret;
 289
 290     TRACE("%s %p\n", debugstr_guid(clsidDMO), name);
 291
 292     if (RegOpenKeyExW(HKEY_CLASSES_ROOT, L"DirectShow\\MediaObjects", 0, KEY_READ, &hrkey))
 293         return E_FAIL;
 294
 295     ret = RegOpenKeyExW(hrkey, GUIDToString(szguid, clsidDMO), 0, KEY_READ, &hkey);
 296     RegCloseKey(hrkey);
 297     if (ret)
 298         return E_FAIL;
 299
 300     ret = RegQueryValueExW(hkey, NULL, NULL, NULL, (LPBYTE)name, &count);
 301     RegCloseKey(hkey);
 302
 303     if (!ret && count > 1)
 304     {
 305         TRACE("name=%s\n", debugstr_w(name));
 306         return S_OK;
 307     }
 308
 309     name[0] = 0;
 310     return S_FALSE;
 311 }
 312
 313 static HRESULT dup_partial_mediatype(const DMO_PARTIAL_MEDIATYPE *types, DWORD count, DMO_PARTIAL_MEDIATYPE **ret)
 314 {
 315     *ret = NULL;
 316
 317     if (count == 0)
 318         return S_OK;
 319
 320     *ret = HeapAlloc(GetProcessHeap(), 0, count*sizeof(*types));
 321     if (!*ret)
 322         return E_OUTOFMEMORY;
 323
 324     memcpy(*ret, types, count*sizeof(*types));
 325     return S_OK;
 326 }
 327
 328 /**************************************************************************
 329  *  IEnumDMO_Constructor
 330  */
 331 static HRESULT IEnumDMO_Constructor(
 332     REFGUID guidCategory,
 333     DWORD dwFlags,
 334     DWORD cInTypes,
 335     const DMO_PARTIAL_MEDIATYPE *pInTypes,
 336     DWORD cOutTypes,
 337     const DMO_PARTIAL_MEDIATYPE *pOutTypes,
 338     IEnumDMO **obj)
 339 {
 340     IEnumDMOImpl* lpedmo;
 341     HRESULT hr;
 342
 343     *obj = NULL;
 344
 345     lpedmo = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IEnumDMOImpl));
 346     if (!lpedmo)
 347         return E_OUTOFMEMORY;
 348
 349     lpedmo->IEnumDMO_iface.lpVtbl = &edmovt;
 350     lpedmo->ref = 1;
 351     lpedmo->index = -1;
 352     lpedmo->category = *guidCategory;
 353     lpedmo->dwFlags = dwFlags;
 354     lpedmo->cInTypes = cInTypes;
 355     lpedmo->cOutTypes = cOutTypes;
 356     lpedmo->hkey = NULL;
 357
 358     hr = dup_partial_mediatype(pInTypes, cInTypes, &lpedmo->pInTypes);
 359     if (FAILED(hr))
 360         goto lerr;
 361
 362     hr = dup_partial_mediatype(pOutTypes, cOutTypes, &lpedmo->pOutTypes);
 363     if (FAILED(hr))
 364         goto lerr;
 365
 366     /* If not filtering by category enum from media objects root */
 367     if (IsEqualGUID(guidCategory, &GUID_NULL))
 368     {
 369         RegOpenKeyExW(HKEY_CLASSES_ROOT, L"DirectShow\\MediaObjects", 0, KEY_READ, &lpedmo->hkey);
 370     }
 371     else
 372     {
 373         WCHAR szguid[64];
 374         WCHAR szKey[MAX_PATH];
 375
 376         swprintf(szKey, ARRAY_SIZE(szKey), L"DirectShow\\MediaObjects\\Categories\\%s",
 377                 GUIDToString(szguid, guidCategory));
 378         RegOpenKeyExW(HKEY_CLASSES_ROOT, szKey, 0, KEY_READ, &lpedmo->hkey);
 379     }
 380
 381 lerr:
 382
 383     if (FAILED(hr))
 384         IEnumDMO_Release(&lpedmo->IEnumDMO_iface);
 385     else
 386     {
 387         TRACE("returning %p\n", lpedmo);
 388         *obj = &lpedmo->IEnumDMO_iface;
 389     }
 390
 391     return hr;
 392 }
 393
 394 /******************************************************************************
 395  * IEnumDMO_fnAddRef
 396  */
 397 static ULONG WINAPI IEnumDMO_fnAddRef(IEnumDMO * iface)
 398 {
 399     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 400     ULONG refCount = InterlockedIncrement(&This->ref);
 401     TRACE("(%p)->(%ld)\n", This, refCount);
 402     return refCount;
 403 }
 404
 405 /**************************************************************************
 406  *  EnumDMO_QueryInterface
 407  */
 408 static HRESULT WINAPI IEnumDMO_fnQueryInterface(IEnumDMO* iface, REFIID riid, void **ppvObj)
 409 {
 410     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 411
 412     TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppvObj);
 413
 414     *ppvObj = NULL;
 415
 416     if (IsEqualIID(riid, &IID_IEnumDMO) ||
 417         IsEqualIID(riid, &IID_IUnknown))
 418     {
 419         *ppvObj = iface;
 420         IEnumDMO_AddRef(iface);
 421     }
 422
 423     return *ppvObj ? S_OK : E_NOINTERFACE;
 424 }
 425
 426 /******************************************************************************
 427  * IEnumDMO_fnRelease
 428  */
 429 static ULONG WINAPI IEnumDMO_fnRelease(IEnumDMO * iface)
 430 {
 431     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 432     ULONG refCount = InterlockedDecrement(&This->ref);
 433
 434     TRACE("(%p)->(%ld)\n", This, refCount);
 435
 436     if (!refCount)
 437     {
 438         if (This->hkey)
 439             RegCloseKey(This->hkey);
 440         HeapFree(GetProcessHeap(), 0, This->pInTypes);
 441         HeapFree(GetProcessHeap(), 0, This->pOutTypes);
 442         HeapFree(GetProcessHeap(), 0, This);
 443     }
 444     return refCount;
 445 }
 446
 447 static BOOL any_types_match(const DMO_PARTIAL_MEDIATYPE *a, unsigned int a_count,
 448         const DMO_PARTIAL_MEDIATYPE *b, unsigned int b_count)
 449 {
 450     unsigned int i, j;
 451
 452     for (i = 0; i < a_count; ++i)
 453     {
 454         for (j = 0; j < b_count; ++j)
 455         {
 456             if (IsMediaTypeEqual(&a[i], &b[j]))
 457                 return TRUE;
 458         }
 459     }
 460     return FALSE;
 461 }
 462
 463 /******************************************************************************
 464  * IEnumDMO_fnNext
 465  */
 466 static HRESULT WINAPI IEnumDMO_fnNext(
 467     IEnumDMO * iface,
 468     DWORD cItemsToFetch,
 469     CLSID * pCLSID,
 470     WCHAR ** Names,
 471     DWORD * pcItemsFetched)
 472 {
 473     DMO_PARTIAL_MEDIATYPE *types = NULL;
 474     unsigned int types_size = 0;
 475     HKEY hkey;
 476     WCHAR szNextKey[MAX_PATH];
 477     WCHAR path[MAX_PATH];
 478     WCHAR szValue[MAX_PATH];
 479     DWORD len;
 480     UINT count = 0;
 481     HRESULT hres = S_OK;
 482     LONG ret;
 483
 484     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 485
 486     TRACE("(%p)->(%ld %p %p %p)\n", This, cItemsToFetch, pCLSID, Names, pcItemsFetched);
 487
 488     if (!pCLSID)
 489         return E_POINTER;
 490
 491     if (!pcItemsFetched && cItemsToFetch > 1)
 492         return E_INVALIDARG;
 493
 494     while (count < cItemsToFetch)
 495     {
 496         This->index++;
 497
 498         len = MAX_PATH;
 499         ret = RegEnumKeyExW(This->hkey, This->index, szNextKey, &len, NULL, NULL, NULL, NULL);
 500         if (ret != ERROR_SUCCESS)
 501         {
 502             hres = HRESULT_FROM_WIN32(ret);
 503             break;
 504         }
 505
 506         if (string_to_guid(szNextKey, &pCLSID[count]) != S_OK)
 507             continue;
 508
 509         TRACE("found %s\n", debugstr_w(szNextKey));
 510
 511         if (!(This->dwFlags & DMO_ENUMF_INCLUDE_KEYED))
 512         {
 513             swprintf(path, ARRAY_SIZE(path), L"DirectShow\\MediaObjects\\%s\\Keyed", szNextKey);
 514             ret = RegOpenKeyExW(HKEY_CLASSES_ROOT, path, 0, KEY_READ, &hkey);
 515             if (ERROR_SUCCESS == ret)
 516             {
 517                 RegCloseKey(hkey);
 518                 /* Skip Keyed entries */
 519                 continue;
 520             }
 521         }
 522
 523         swprintf(path, ARRAY_SIZE(path), L"DirectShow\\MediaObjects\\%s", szNextKey);
 524         ret = RegOpenKeyExW(HKEY_CLASSES_ROOT, path, 0, KEY_READ, &hkey);
 525         TRACE("Testing %s.\n", debugstr_w(path));
 526
 527         if (This->pInTypes)
 528         {
 529             DWORD size, i;
 530
 531             for (;;)
 532             {
 533                 size = types_size;
 534                 ret = RegQueryValueExW(hkey, L"InputTypes", NULL, NULL, (BYTE *)types, &size);
 535                 if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA)
 536                     break;
 537                 if (size <= types_size)
 538                     break;
 539                 if (!array_reserve((void **)&types, &types_size, size, 1))
 540                 {
 541                     RegCloseKey(hkey);
 542                     free(types);
 543                     return E_OUTOFMEMORY;
 544                 }
 545             }
 546             if (ret)
 547             {
 548                 RegCloseKey(hkey);
 549                 continue;
 550             }
 551
 552             for (i = 0; i < size / sizeof(DMO_PARTIAL_MEDIATYPE); ++i)
 553                 TRACE("intype %ld: type %s, subtype %s\n", i, debugstr_guid(&types[i].type),
 554                     debugstr_guid(&types[i].subtype));
 555
 556             if (!any_types_match(types, size / sizeof(DMO_PARTIAL_MEDIATYPE), This->pInTypes, This->cInTypes))
 557             {
 558                 RegCloseKey(hkey);
 559                 continue;
 560             }
 561         }
 562
 563         if (This->pOutTypes)
 564         {
 565             DWORD size = types_size, i;
 566
 567             for (;;)
 568             {
 569                 size = types_size;
 570                 ret = RegQueryValueExW(hkey, L"OutputTypes", NULL, NULL, (BYTE *)types, &size);
 571                 if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA)
 572                     break;
 573                 if (size <= types_size)
 574                     break;
 575                 if (!array_reserve((void **)&types, &types_size, size, 1))
 576                 {
 577                     RegCloseKey(hkey);
 578                     free(types);
 579                     return E_OUTOFMEMORY;
 580                 }
 581             }
 582             if (ret)
 583             {
 584                 RegCloseKey(hkey);
 585                 continue;
 586             }
 587
 588             for (i = 0; i < size / sizeof(DMO_PARTIAL_MEDIATYPE); ++i)
 589                 TRACE("outtype %ld: type %s, subtype %s\n", i, debugstr_guid(&types[i].type),
 590                     debugstr_guid(&types[i].subtype));
 591
 592             if (!any_types_match(types, size / sizeof(DMO_PARTIAL_MEDIATYPE), This->pOutTypes, This->cOutTypes))
 593             {
 594                 RegCloseKey(hkey);
 595                 continue;
 596             }
 597         }
 598
 599         /* Media object wasn't filtered so add it to return list */
 600         len = MAX_PATH * sizeof(WCHAR);
 601         ret = RegQueryValueExW(hkey, NULL, NULL, NULL, (LPBYTE)szValue, &len);
 602         if (Names)
 603         {
 604             Names[count] = NULL;
 605             if (ret == ERROR_SUCCESS)
 606             {
 607                 Names[count] = CoTaskMemAlloc((wcslen(szValue) + 1) * sizeof(WCHAR));
 608                 if (Names[count])
 609                     wcscpy(Names[count], szValue);
 610             }
 611         }
 612
 613         TRACE("found match %s %s\n", debugstr_w(szValue), debugstr_w(szNextKey));
 614         RegCloseKey(hkey);
 615         count++;
 616     }
 617
 618     free(types);
 619
 620     if (pcItemsFetched) *pcItemsFetched = count;
 621     if (count < cItemsToFetch)
 622         hres = S_FALSE;
 623
 624     TRACE("<-- %i found\n",count);
 625     return hres;
 626 }
 627
 628
 629 /******************************************************************************
 630  * IEnumDMO_fnSkip
 631  */
 632 static HRESULT WINAPI IEnumDMO_fnSkip(IEnumDMO * iface, DWORD cItemsToSkip)
 633 {
 634     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 635
 636     TRACE("(%p)->(%ld)\n", This, cItemsToSkip);
 637     This->index += cItemsToSkip;
 638
 639     return S_OK;
 640 }
 641
 642
 643 /******************************************************************************
 644  * IEnumDMO_fnReset
 645  */
 646 static HRESULT WINAPI IEnumDMO_fnReset(IEnumDMO * iface)
 647 {
 648     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 649
 650     TRACE("(%p)\n", This);
 651     This->index = -1;
 652
 653     return S_OK;
 654 }
 655
 656
 657 /******************************************************************************
 658  * IEnumDMO_fnClone
 659  */
 660 static HRESULT WINAPI IEnumDMO_fnClone(IEnumDMO *iface, IEnumDMO **ppEnum)
 661 {
 662     IEnumDMOImpl *This = impl_from_IEnumDMO(iface);
 663     TRACE("(%p)->(%p)\n", This, ppEnum);
 664     return IEnumDMO_Constructor(&This->category, This->dwFlags, This->cInTypes, This->pInTypes,
 665         This->cOutTypes, This->pOutTypes, ppEnum);
 666 }
 667
 668
 669 /***************************************************************
 670  * DMOEnum (MSDMO.@)
 671  *
 672  * Enumerate DirectX Media Objects in the registry.
 673  */
 674 HRESULT WINAPI DMOEnum(
 675     REFGUID category,
 676     DWORD flags,
 677     DWORD cInTypes,
 678     const DMO_PARTIAL_MEDIATYPE *pInTypes,
 679     DWORD cOutTypes,
 680     const DMO_PARTIAL_MEDIATYPE *pOutTypes,
 681     IEnumDMO **ppEnum)
 682 {
 683     TRACE("%s 0x%08lx %ld %p %ld %p %p\n", debugstr_guid(category), flags, cInTypes, pInTypes,
 684         cOutTypes, pOutTypes, ppEnum);
 685
 686     if (TRACE_ON(msdmo))
 687     {
 688         DWORD i;
 689         if (cInTypes)
 690         {
 691             for (i = 0; i < cInTypes; i++)
 692                 TRACE("intype %ld - type %s, subtype %s\n", i, debugstr_guid(&pInTypes[i].type),
 693                     debugstr_guid(&pInTypes[i].subtype));
 694         }
 695
 696         if (cOutTypes) {
 697             for (i = 0; i < cOutTypes; i++)
 698                 TRACE("outtype %ld - type %s, subtype %s\n", i, debugstr_guid(&pOutTypes[i].type),
 699                     debugstr_guid(&pOutTypes[i].subtype));
 700         }
 701     }
 702
 703     return IEnumDMO_Constructor(category, flags, cInTypes,
 704         pInTypes, cOutTypes, pOutTypes, ppEnum);
 705 }
 706
 707
 708 static const IEnumDMOVtbl edmovt =
 709 {
 710         IEnumDMO_fnQueryInterface,
 711         IEnumDMO_fnAddRef,
 712         IEnumDMO_fnRelease,
 713         IEnumDMO_fnNext,
 714         IEnumDMO_fnSkip,
 715         IEnumDMO_fnReset,
 716         IEnumDMO_fnClone,
 717 };
 718
 719 /***************************************************************
 720  * DMOGetTypes (MSDMO.@)
 721  */
 722 HRESULT WINAPI DMOGetTypes(REFCLSID clsid, ULONG input_count, ULONG *ret_input_count, DMO_PARTIAL_MEDIATYPE *input,
 723         ULONG output_count, ULONG *ret_output_count, DMO_PARTIAL_MEDIATYPE *output)
 724 {
 725     WCHAR guidstr[64];
 726     HKEY root, key;
 727     LSTATUS ret;
 728     DWORD size;
 729
 730     TRACE("clsid %s, input_count %lu, ret_input_count %p, input %p, output_count %lu, ret_output_count %p, output %p.\n",
 731             debugstr_guid(clsid), input_count, ret_input_count, input, output_count, ret_output_count, output);
 732
 733     if (RegOpenKeyExW(HKEY_CLASSES_ROOT, L"DirectShow\\MediaObjects", 0, KEY_READ, &root))
 734         return E_FAIL;
 735
 736     if (RegOpenKeyExW(root, GUIDToString(guidstr, clsid), 0, KEY_READ, &key))
 737     {
 738         RegCloseKey(root);
 739         return E_FAIL;
 740     }
 741
 742     *ret_input_count = 0;
 743     size = input_count * sizeof(DMO_PARTIAL_MEDIATYPE);
 744     ret = RegQueryValueExW(key, L"InputTypes", NULL, NULL, (BYTE *)input, &size);
 745     if (!ret || ret == ERROR_MORE_DATA)
 746         *ret_input_count = min(input_count, size / sizeof(DMO_PARTIAL_MEDIATYPE));
 747
 748     *ret_output_count = 0;
 749     size = output_count * sizeof(DMO_PARTIAL_MEDIATYPE);
 750     ret = RegQueryValueExW(key, L"OutputTypes", NULL, NULL, (BYTE *)output, &size);
 751     if (!ret || ret == ERROR_MORE_DATA)
 752         *ret_output_count = min(output_count, size / sizeof(DMO_PARTIAL_MEDIATYPE));
 753
 754     RegCloseKey(key);
 755     RegCloseKey(root);
 756     return S_OK;
 757 }