dlls/quartz/filtermapper.c

   1 /*
   2  * IFilterMapper & IFilterMapper3 Implementations
   3  *
   4  * Copyright 2003 Robert Shearman
   5  * Copyright 2004 Christian Costa
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #define NONAMELESSUNION
  23 #define NONAMELESSSTRUCT
  24 #include <stdarg.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winuser.h"
  29 #include "winreg.h"
  30 #include "winerror.h"
  31
  32 #include "quartz_private.h"
  33
  34 #include "ole2.h"
  35 #include "olectl.h"
  36 #include "strmif.h"
  37 #include "wine/unicode.h"
  38 #include "uuids.h"
  39 #include "initguid.h"
  40 #include "fil_data.h"
  41
  42 #include "wine/debug.h"
  43
  44 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  45
  46 #define ARRAYSIZE(array) (sizeof(array)/sizeof((array)[0]))
  47
  48 typedef struct FilterMapper3Impl
  49 {
  50     IUnknown IUnknown_inner;
  51     IFilterMapper3 IFilterMapper3_iface;
  52     IFilterMapper IFilterMapper_iface;
  53     IAMFilterData IAMFilterData_iface;
  54     IUnknown *outer_unk;
  55     LONG ref;
  56 } FilterMapper3Impl;
  57
  58 static inline FilterMapper3Impl *impl_from_IFilterMapper3( IFilterMapper3 *iface )
  59 {
  60     return CONTAINING_RECORD(iface, FilterMapper3Impl, IFilterMapper3_iface);
  61 }
  62
  63 static inline FilterMapper3Impl *impl_from_IFilterMapper( IFilterMapper *iface )
  64 {
  65     return CONTAINING_RECORD(iface, FilterMapper3Impl, IFilterMapper_iface);
  66 }
  67
  68 static inline FilterMapper3Impl *impl_from_IAMFilterData( IAMFilterData *iface )
  69 {
  70     return CONTAINING_RECORD(iface, FilterMapper3Impl, IAMFilterData_iface);
  71 }
  72
  73 static inline FilterMapper3Impl *impl_from_IUnknown( IUnknown *iface )
  74 {
  75     return CONTAINING_RECORD(iface, FilterMapper3Impl, IUnknown_inner);
  76 }
  77
  78 static const WCHAR wszClsidSlash[] = {'C','L','S','I','D','\\',0};
  79 static const WCHAR wszSlashInstance[] = {'\\','I','n','s','t','a','n','c','e','\\',0};
  80 static const WCHAR wszSlash[] = {'\\',0};
  81
  82 /* CLSID property in media category Moniker */
  83 static const WCHAR wszClsidName[] = {'C','L','S','I','D',0};
  84 /* FriendlyName property in media category Moniker */
  85 static const WCHAR wszFriendlyName[] = {'F','r','i','e','n','d','l','y','N','a','m','e',0};
  86 /* Merit property in media category Moniker (CLSID_ActiveMovieCategories only) */
  87 static const WCHAR wszMeritName[] = {'M','e','r','i','t',0};
  88 /* FilterData property in media category Moniker (not CLSID_ActiveMovieCategories) */
  89 static const WCHAR wszFilterDataName[] = {'F','i','l','t','e','r','D','a','t','a',0};
  90 /* For filters registered with IFilterMapper */
  91 static const WCHAR wszFilterSlash[] = {'F','i','l','t','e','r','\\',0};
  92 static const WCHAR wszFilter[] = {'F','i','l','t','e','r',0};
  93 /* For pins registered with IFilterMapper */
  94 static const WCHAR wszPins[] = {'P','i','n','s',0};
  95 static const WCHAR wszAllowedMany[] = {'A','l','l','o','w','e','d','M','a','n','y',0};
  96 static const WCHAR wszAllowedZero[] = {'A','l','l','o','w','e','d','Z','e','r','o',0};
  97 static const WCHAR wszDirection[] = {'D','i','r','e','c','t','i','o','n',0};
  98 static const WCHAR wszIsRendered[] = {'I','s','R','e','n','d','e','r','e','d',0};
  99 /* For types registered with IFilterMapper */
 100 static const WCHAR wszTypes[] = {'T','y','p','e','s',0};
 101
 102
 103 /* registry format for REGFILTER2 */
 104 struct REG_RF
 105 {
 106     DWORD dwVersion;
 107     DWORD dwMerit;
 108     DWORD dwPins;
 109     DWORD dwUnused;
 110 };
 111
 112 struct REG_RFP
 113 {
 114     BYTE signature[4]; /* e.g. "0pi3" */
 115     DWORD dwFlags;
 116     DWORD dwInstances;
 117     DWORD dwMediaTypes;
 118     DWORD dwMediums;
 119     DWORD bCategory; /* is there a category clsid? */
 120     /* optional: dwOffsetCategoryClsid */
 121 };
 122
 123 struct REG_TYPE
 124 {
 125     BYTE signature[4]; /* e.g. "0ty3" */
 126     DWORD dwUnused;
 127     DWORD dwOffsetMajor;
 128     DWORD dwOffsetMinor;
 129 };
 130
 131 struct MONIKER_MERIT
 132 {
 133     IMoniker * pMoniker;
 134     DWORD dwMerit;
 135 };
 136
 137 struct Vector
 138 {
 139     LPBYTE pData;
 140     int capacity; /* in bytes */
 141     int current; /* pointer to next free byte */
 142 };
 143
 144 /* returns the position it was added at */
 145 static int add_data(struct Vector * v, const BYTE * pData, int size)
 146 {
 147     int index = v->current;
 148     if (v->current + size > v->capacity)
 149     {
 150         LPBYTE pOldData = v->pData;
 151         v->capacity = (v->capacity + size) * 2;
 152         v->pData = CoTaskMemAlloc(v->capacity);
 153         memcpy(v->pData, pOldData, v->current);
 154         CoTaskMemFree(pOldData);
 155     }
 156     memcpy(v->pData + v->current, pData, size);
 157     v->current += size;
 158     return index;
 159 }
 160
 161 static int find_data(const struct Vector * v, const BYTE * pData, int size)
 162 {
 163     int index;
 164     for (index = 0; index < v->current; index++)
 165         if (!memcmp(v->pData + index, pData, size))
 166             return index;
 167     /* not found */
 168     return -1;
 169 }
 170
 171 static void delete_vector(struct Vector * v)
 172 {
 173     CoTaskMemFree(v->pData);
 174     v->current = 0;
 175     v->capacity = 0;
 176 }
 177
 178 /*** IUnknown (inner) methods ***/
 179
 180 static HRESULT WINAPI Inner_QueryInterface(IUnknown *iface, REFIID riid, void **ppv)
 181 {
 182     FilterMapper3Impl *This = impl_from_IUnknown(iface);
 183
 184     TRACE("(%p)->(%s, %p)\n", This, debugstr_guid(riid), ppv);
 185
 186     *ppv = NULL;
 187     if (IsEqualIID(riid, &IID_IUnknown))
 188         *ppv = &This->IUnknown_inner;
 189     else if (IsEqualIID(riid, &IID_IFilterMapper2) || IsEqualIID(riid, &IID_IFilterMapper3))
 190         *ppv = &This->IFilterMapper3_iface;
 191     else if (IsEqualIID(riid, &IID_IFilterMapper))
 192         *ppv = &This->IFilterMapper_iface;
 193     else if (IsEqualIID(riid, &IID_IAMFilterData))
 194         *ppv = &This->IAMFilterData_iface;
 195
 196     if (*ppv != NULL)
 197     {
 198         IUnknown_AddRef((IUnknown *)*ppv);
 199         return S_OK;
 200     }
 201
 202     FIXME("No interface for %s\n", debugstr_guid(riid));
 203     return E_NOINTERFACE;
 204 }
 205
 206 static ULONG WINAPI Inner_AddRef(IUnknown *iface)
 207 {
 208     FilterMapper3Impl *This = impl_from_IUnknown(iface);
 209     ULONG ref = InterlockedIncrement(&This->ref);
 210
 211     TRACE("(%p)->(): new ref = %d\n", This, ref);
 212
 213     return ref;
 214 }
 215
 216 static ULONG WINAPI Inner_Release(IUnknown *iface)
 217 {
 218     FilterMapper3Impl *This = impl_from_IUnknown(iface);
 219     ULONG ref = InterlockedDecrement(&This->ref);
 220
 221     TRACE("(%p)->(): new ref = %d\n", This, ref);
 222
 223     if (ref == 0)
 224         CoTaskMemFree(This);
 225
 226     return ref;
 227 }
 228
 229 static const IUnknownVtbl IInner_VTable =
 230 {
 231     Inner_QueryInterface,
 232     Inner_AddRef,
 233     Inner_Release
 234 };
 235
 236 static HRESULT WINAPI FilterMapper3_QueryInterface(IFilterMapper3 * iface, REFIID riid, LPVOID *ppv)
 237 {
 238     FilterMapper3Impl *This = impl_from_IFilterMapper3(iface);
 239
 240     return IUnknown_QueryInterface(This->outer_unk, riid, ppv);
 241 }
 242
 243 static ULONG WINAPI FilterMapper3_AddRef(IFilterMapper3 * iface)
 244 {
 245     FilterMapper3Impl *This = impl_from_IFilterMapper3(iface);
 246
 247     return IUnknown_AddRef(This->outer_unk);
 248 }
 249
 250 static ULONG WINAPI FilterMapper3_Release(IFilterMapper3 * iface)
 251 {
 252     FilterMapper3Impl *This = impl_from_IFilterMapper3(iface);
 253
 254     return IUnknown_Release(This->outer_unk);
 255 }
 256
 257 /*** IFilterMapper3 methods ***/
 258
 259 static HRESULT WINAPI FilterMapper3_CreateCategory(
 260     IFilterMapper3 * iface,
 261     REFCLSID clsidCategory,
 262     DWORD dwCategoryMerit,
 263     LPCWSTR szDescription)
 264 {
 265     LPWSTR wClsidAMCat = NULL;
 266     LPWSTR wClsidCategory = NULL;
 267     WCHAR wszKeyName[ARRAYSIZE(wszClsidSlash)-1 + ARRAYSIZE(wszSlashInstance)-1 + (CHARS_IN_GUID-1) * 2 + 1];
 268     HKEY hKey = NULL;
 269     LONG lRet;
 270     HRESULT hr;
 271
 272     TRACE("(%s, %x, %s)\n", debugstr_guid(clsidCategory), dwCategoryMerit, debugstr_w(szDescription));
 273
 274     hr = StringFromCLSID(&CLSID_ActiveMovieCategories, &wClsidAMCat);
 275
 276     if (SUCCEEDED(hr))
 277     {
 278         hr = StringFromCLSID(clsidCategory, &wClsidCategory);
 279     }
 280
 281     if (SUCCEEDED(hr))
 282     {
 283         strcpyW(wszKeyName, wszClsidSlash);
 284         strcatW(wszKeyName, wClsidAMCat);
 285         strcatW(wszKeyName, wszSlashInstance);
 286         strcatW(wszKeyName, wClsidCategory);
 287
 288         lRet = RegCreateKeyExW(HKEY_CLASSES_ROOT, wszKeyName, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey, NULL);
 289         hr = HRESULT_FROM_WIN32(lRet);
 290     }
 291
 292     if (SUCCEEDED(hr))
 293     {
 294         lRet = RegSetValueExW(hKey, wszFriendlyName, 0, REG_SZ, (const BYTE*)szDescription, (strlenW(szDescription) + 1) * sizeof(WCHAR));
 295         hr = HRESULT_FROM_WIN32(lRet);
 296     }
 297
 298     if (SUCCEEDED(hr))
 299     {
 300         lRet = RegSetValueExW(hKey, wszClsidName, 0, REG_SZ, (LPBYTE)wClsidCategory, (strlenW(wClsidCategory) + 1) * sizeof(WCHAR));
 301         hr = HRESULT_FROM_WIN32(lRet);
 302     }
 303
 304     if (SUCCEEDED(hr))
 305     {
 306         lRet = RegSetValueExW(hKey, wszMeritName, 0, REG_DWORD, (LPBYTE)&dwCategoryMerit, sizeof(dwCategoryMerit));
 307         hr = HRESULT_FROM_WIN32(lRet);
 308     }
 309
 310     RegCloseKey(hKey);
 311     CoTaskMemFree(wClsidCategory);
 312     CoTaskMemFree(wClsidAMCat);
 313
 314     return hr;
 315 }
 316
 317 static HRESULT WINAPI FilterMapper3_UnregisterFilter(
 318     IFilterMapper3 * iface,
 319     const CLSID *pclsidCategory,
 320     const OLECHAR *szInstance,
 321     REFCLSID Filter)
 322 {
 323     WCHAR wszKeyName[MAX_PATH];
 324     LPWSTR wClsidCategory = NULL;
 325     LPWSTR wFilter = NULL;
 326     HRESULT hr;
 327
 328     TRACE("(%p, %s, %s)\n", pclsidCategory, debugstr_w(szInstance), debugstr_guid(Filter));
 329
 330     if (!pclsidCategory)
 331         pclsidCategory = &CLSID_LegacyAmFilterCategory;
 332
 333     hr = StringFromCLSID(pclsidCategory, &wClsidCategory);
 334
 335     if (SUCCEEDED(hr))
 336     {
 337         strcpyW(wszKeyName, wszClsidSlash);
 338         strcatW(wszKeyName, wClsidCategory);
 339         strcatW(wszKeyName, wszSlashInstance);
 340         if (szInstance)
 341             strcatW(wszKeyName, szInstance);
 342         else
 343         {
 344             hr = StringFromCLSID(Filter, &wFilter);
 345             if (SUCCEEDED(hr))
 346                 strcatW(wszKeyName, wFilter);
 347         }
 348     }
 349
 350     if (SUCCEEDED(hr))
 351     {
 352         LONG lRet = RegDeleteKeyW(HKEY_CLASSES_ROOT, wszKeyName);
 353         hr = HRESULT_FROM_WIN32(lRet);
 354     }
 355
 356     CoTaskMemFree(wClsidCategory);
 357     CoTaskMemFree(wFilter);
 358
 359     return hr;
 360 }
 361
 362 static HRESULT FM2_WriteFriendlyName(IPropertyBag * pPropBag, LPCWSTR szName)
 363 {
 364     VARIANT var;
 365     HRESULT ret;
 366     BSTR value;
 367
 368     V_VT(&var) = VT_BSTR;
 369     V_UNION(&var, bstrVal) = value = SysAllocString(szName);
 370
 371     ret = IPropertyBag_Write(pPropBag, wszFriendlyName, &var);
 372     SysFreeString(value);
 373
 374     return ret;
 375 }
 376
 377 static HRESULT FM2_WriteClsid(IPropertyBag * pPropBag, REFCLSID clsid)
 378 {
 379     LPWSTR wszClsid = NULL;
 380     VARIANT var;
 381     HRESULT hr;
 382
 383     hr = StringFromCLSID(clsid, &wszClsid);
 384
 385     if (SUCCEEDED(hr))
 386     {
 387         V_VT(&var) = VT_BSTR;
 388         V_UNION(&var, bstrVal) = wszClsid;
 389         hr = IPropertyBag_Write(pPropBag, wszClsidName, &var);
 390     }
 391     CoTaskMemFree(wszClsid);
 392     return hr;
 393 }
 394
 395 static HRESULT FM2_WriteFilterData(const REGFILTER2 * prf2, BYTE **ppData, ULONG *pcbData)
 396 {
 397     int size = sizeof(struct REG_RF);
 398     unsigned int i;
 399     struct Vector mainStore = {NULL, 0, 0};
 400     struct Vector clsidStore = {NULL, 0, 0};
 401     struct REG_RF rrf;
 402     HRESULT hr = S_OK;
 403
 404     rrf.dwVersion = prf2->dwVersion;
 405     rrf.dwMerit = prf2->dwMerit;
 406     rrf.dwPins = prf2->u.s2.cPins2;
 407     rrf.dwUnused = 0;
 408
 409     add_data(&mainStore, (LPBYTE)&rrf, sizeof(rrf));
 410
 411     for (i = 0; i < prf2->u.s2.cPins2; i++)
 412     {
 413         size += sizeof(struct REG_RFP);
 414         if (prf2->u.s2.rgPins2[i].clsPinCategory)
 415             size += sizeof(DWORD);
 416         size += prf2->u.s2.rgPins2[i].nMediaTypes * sizeof(struct REG_TYPE);
 417         size += prf2->u.s2.rgPins2[i].nMediums * sizeof(DWORD);
 418     }
 419
 420     for (i = 0; i < prf2->u.s2.cPins2; i++)
 421     {
 422         struct REG_RFP rrfp;
 423         REGFILTERPINS2 rgPin2 = prf2->u.s2.rgPins2[i];
 424         unsigned int j;
 425
 426         rrfp.signature[0] = '0';
 427         rrfp.signature[1] = 'p';
 428         rrfp.signature[2] = 'i';
 429         rrfp.signature[3] = '3';
 430         rrfp.signature[0] += i;
 431         rrfp.dwFlags = rgPin2.dwFlags;
 432         rrfp.dwInstances = rgPin2.cInstances;
 433         rrfp.dwMediaTypes = rgPin2.nMediaTypes;
 434         rrfp.dwMediums = rgPin2.nMediums;
 435         rrfp.bCategory = rgPin2.clsPinCategory ? 1 : 0;
 436
 437         add_data(&mainStore, (LPBYTE)&rrfp, sizeof(rrfp));
 438         if (rrfp.bCategory)
 439         {
 440             DWORD index = find_data(&clsidStore, (const BYTE*)rgPin2.clsPinCategory, sizeof(CLSID));
 441             if (index == -1)
 442                 index = add_data(&clsidStore, (const BYTE*)rgPin2.clsPinCategory, sizeof(CLSID));
 443             index += size;
 444
 445             add_data(&mainStore, (LPBYTE)&index, sizeof(index));
 446         }
 447
 448         for (j = 0; j < rgPin2.nMediaTypes; j++)
 449         {
 450             struct REG_TYPE rt;
 451             const CLSID * clsMinorType = rgPin2.lpMediaType[j].clsMinorType ? rgPin2.lpMediaType[j].clsMinorType : &MEDIASUBTYPE_NULL;
 452             rt.signature[0] = '0';
 453             rt.signature[1] = 't';
 454             rt.signature[2] = 'y';
 455             rt.signature[3] = '3';
 456             rt.signature[0] += j;
 457             rt.dwUnused = 0;
 458             rt.dwOffsetMajor = find_data(&clsidStore, (const BYTE*)rgPin2.lpMediaType[j].clsMajorType, sizeof(CLSID));
 459             if (rt.dwOffsetMajor == -1)
 460                 rt.dwOffsetMajor = add_data(&clsidStore, (const BYTE*)rgPin2.lpMediaType[j].clsMajorType, sizeof(CLSID));
 461             rt.dwOffsetMajor += size;
 462             rt.dwOffsetMinor = find_data(&clsidStore, (const BYTE*)clsMinorType, sizeof(CLSID));
 463             if (rt.dwOffsetMinor == -1)
 464                 rt.dwOffsetMinor = add_data(&clsidStore, (const BYTE*)clsMinorType, sizeof(CLSID));
 465             rt.dwOffsetMinor += size;
 466
 467             add_data(&mainStore, (LPBYTE)&rt, sizeof(rt));
 468         }
 469
 470         for (j = 0; j < rgPin2.nMediums; j++)
 471         {
 472             DWORD index = find_data(&clsidStore, (const BYTE*)(rgPin2.lpMedium + j), sizeof(REGPINMEDIUM));
 473             if (index == -1)
 474                 index = add_data(&clsidStore, (const BYTE*)(rgPin2.lpMedium + j), sizeof(REGPINMEDIUM));
 475             index += size;
 476
 477             add_data(&mainStore, (LPBYTE)&index, sizeof(index));
 478         }
 479     }
 480
 481     if (SUCCEEDED(hr))
 482     {
 483         *pcbData = mainStore.current + clsidStore.current;
 484         *ppData = CoTaskMemAlloc(*pcbData);
 485         if (!*ppData)
 486             hr = E_OUTOFMEMORY;
 487     }
 488
 489     if (SUCCEEDED(hr))
 490     {
 491         memcpy(*ppData, mainStore.pData, mainStore.current);
 492         memcpy((*ppData) + mainStore.current, clsidStore.pData, clsidStore.current);
 493     }
 494
 495     delete_vector(&mainStore);
 496     delete_vector(&clsidStore);
 497     return hr;
 498 }
 499
 500 static HRESULT FM2_ReadFilterData(BYTE *pData, REGFILTER2 * prf2)
 501 {
 502     HRESULT hr = S_OK;
 503     struct REG_RF * prrf;
 504     LPBYTE pCurrent;
 505     DWORD i;
 506     REGFILTERPINS2 * rgPins2;
 507
 508     prrf = (struct REG_RF *)pData;
 509     pCurrent = pData;
 510
 511     if (prrf->dwVersion != 2)
 512     {
 513         FIXME("Filter registry version %d not supported\n", prrf->dwVersion);
 514         ZeroMemory(prf2, sizeof(*prf2));
 515         hr = E_FAIL;
 516     }
 517
 518     if (SUCCEEDED(hr))
 519     {
 520         TRACE("version = %d, merit = %x, #pins = %d, unused = %x\n",
 521             prrf->dwVersion, prrf->dwMerit, prrf->dwPins, prrf->dwUnused);
 522
 523         prf2->dwVersion = prrf->dwVersion;
 524         prf2->dwMerit = prrf->dwMerit;
 525         prf2->u.s2.cPins2 = prrf->dwPins;
 526         rgPins2 = CoTaskMemAlloc(prrf->dwPins * sizeof(*rgPins2));
 527         prf2->u.s2.rgPins2 = rgPins2;
 528         pCurrent += sizeof(struct REG_RF);
 529
 530         for (i = 0; i < prrf->dwPins; i++)
 531         {
 532             struct REG_RFP * prrfp = (struct REG_RFP *)pCurrent;
 533             REGPINTYPES * lpMediaType;
 534             REGPINMEDIUM * lpMedium;
 535             UINT j;
 536
 537             /* FIXME: check signature */
 538
 539             TRACE("\tsignature = %s\n", debugstr_an((const char*)prrfp->signature, 4));
 540
 541             TRACE("\tpin[%d]: flags = %x, instances = %d, media types = %d, mediums = %d\n",
 542                 i, prrfp->dwFlags, prrfp->dwInstances, prrfp->dwMediaTypes, prrfp->dwMediums);
 543
 544             rgPins2[i].dwFlags = prrfp->dwFlags;
 545             rgPins2[i].cInstances = prrfp->dwInstances;
 546             rgPins2[i].nMediaTypes = prrfp->dwMediaTypes;
 547             rgPins2[i].nMediums = prrfp->dwMediums;
 548             pCurrent += sizeof(struct REG_RFP);
 549             if (prrfp->bCategory)
 550             {
 551                 CLSID * clsCat = CoTaskMemAlloc(sizeof(CLSID));
 552                 memcpy(clsCat, pData + *(DWORD*)(pCurrent), sizeof(CLSID));
 553                 pCurrent += sizeof(DWORD);
 554                 rgPins2[i].clsPinCategory = clsCat;
 555             }
 556             else
 557                 rgPins2[i].clsPinCategory = NULL;
 558
 559             if (rgPins2[i].nMediaTypes > 0)
 560                 lpMediaType = CoTaskMemAlloc(rgPins2[i].nMediaTypes * sizeof(*lpMediaType));
 561             else
 562                 lpMediaType = NULL;
 563
 564             rgPins2[i].lpMediaType = lpMediaType;
 565
 566             for (j = 0; j < rgPins2[i].nMediaTypes; j++)
 567             {
 568                 struct REG_TYPE * prt = (struct REG_TYPE *)pCurrent;
 569                 CLSID * clsMajor = CoTaskMemAlloc(sizeof(CLSID));
 570                 CLSID * clsMinor = CoTaskMemAlloc(sizeof(CLSID));
 571
 572                 /* FIXME: check signature */
 573                 TRACE("\t\tsignature = %s\n", debugstr_an((const char*)prt->signature, 4));
 574
 575                 memcpy(clsMajor, pData + prt->dwOffsetMajor, sizeof(CLSID));
 576                 memcpy(clsMinor, pData + prt->dwOffsetMinor, sizeof(CLSID));
 577
 578                 lpMediaType[j].clsMajorType = clsMajor;
 579                 lpMediaType[j].clsMinorType = clsMinor;
 580
 581                 pCurrent += sizeof(*prt);
 582             }
 583
 584             if (rgPins2[i].nMediums > 0)
 585                 lpMedium = CoTaskMemAlloc(rgPins2[i].nMediums * sizeof(*lpMedium));
 586             else
 587                 lpMedium = NULL;
 588
 589             rgPins2[i].lpMedium = lpMedium;
 590
 591             for (j = 0; j < rgPins2[i].nMediums; j++)
 592             {
 593                 DWORD dwOffset = *(DWORD *)pCurrent;
 594
 595                 memcpy(lpMedium + j, pData + dwOffset, sizeof(REGPINMEDIUM));
 596
 597                 pCurrent += sizeof(dwOffset);
 598             }
 599         }
 600
 601     }
 602
 603     return hr;
 604 }
 605
 606 static void FM2_DeleteRegFilter(REGFILTER2 * prf2)
 607 {
 608     UINT i;
 609     for (i = 0; i < prf2->u.s2.cPins2; i++)
 610     {
 611         UINT j;
 612         if (prf2->u.s2.rgPins2[i].clsPinCategory)
 613             CoTaskMemFree((LPVOID)prf2->u.s2.rgPins2[i].clsPinCategory);
 614
 615         for (j = 0; j < prf2->u.s2.rgPins2[i].nMediaTypes; j++)
 616         {
 617             CoTaskMemFree((LPVOID)prf2->u.s2.rgPins2[i].lpMediaType[j].clsMajorType);
 618             CoTaskMemFree((LPVOID)prf2->u.s2.rgPins2[i].lpMediaType[j].clsMinorType);
 619         }
 620         CoTaskMemFree((LPVOID)prf2->u.s2.rgPins2[i].lpMediaType);
 621         CoTaskMemFree((LPVOID)prf2->u.s2.rgPins2[i].lpMedium);
 622     }
 623     CoTaskMemFree((LPVOID)prf2->u.s2.rgPins2);
 624 }
 625
 626 static HRESULT WINAPI FilterMapper3_RegisterFilter(
 627     IFilterMapper3 * iface,
 628     REFCLSID clsidFilter,
 629     LPCWSTR szName,
 630     IMoniker **ppMoniker,
 631     const CLSID *pclsidCategory,
 632     const OLECHAR *szInstance,
 633     const REGFILTER2 *prf2)
 634 {
 635     IParseDisplayName * pParser = NULL;
 636     IBindCtx * pBindCtx = NULL;
 637     IMoniker * pMoniker = NULL;
 638     IPropertyBag * pPropBag = NULL;
 639     HRESULT hr;
 640     LPWSTR pwszParseName = NULL;
 641     LPWSTR pCurrent;
 642     static const WCHAR wszDevice[] = {'@','d','e','v','i','c','e',':','s','w',':',0};
 643     int nameLen;
 644     ULONG ulEaten;
 645     LPWSTR szClsidTemp = NULL;
 646     REGFILTER2 regfilter2;
 647     REGFILTERPINS2* pregfp2 = NULL;
 648
 649     TRACE("(%s, %s, %p, %s, %s, %p)\n",
 650         debugstr_guid(clsidFilter),
 651         debugstr_w(szName),
 652         ppMoniker,
 653         debugstr_guid(pclsidCategory),
 654         debugstr_w(szInstance),
 655         prf2);
 656
 657     if (prf2->dwVersion == 2)
 658     {
 659         regfilter2 = *prf2;
 660     }
 661     else if (prf2->dwVersion == 1)
 662     {
 663         ULONG i;
 664         DWORD flags;
 665         /* REGFILTER2 structure is converted from version 1 to 2. Tested on Win2k. */
 666         regfilter2.dwVersion = 2;
 667         regfilter2.dwMerit = prf2->dwMerit;
 668         regfilter2.u.s2.cPins2 = prf2->u.s1.cPins;
 669         pregfp2 = CoTaskMemAlloc(prf2->u.s1.cPins * sizeof(REGFILTERPINS2));
 670         regfilter2.u.s2.rgPins2 = pregfp2;
 671         for (i = 0; i < prf2->u.s1.cPins; i++)
 672         {
 673             flags = 0;
 674             if (prf2->u.s1.rgPins[i].bRendered)
 675                 flags |= REG_PINFLAG_B_RENDERER;
 676             if (prf2->u.s1.rgPins[i].bOutput)
 677                 flags |= REG_PINFLAG_B_OUTPUT;
 678             if (prf2->u.s1.rgPins[i].bZero)
 679                 flags |= REG_PINFLAG_B_ZERO;
 680             if (prf2->u.s1.rgPins[i].bMany)
 681                 flags |= REG_PINFLAG_B_MANY;
 682             pregfp2[i].dwFlags = flags;
 683             pregfp2[i].cInstances = 1;
 684             pregfp2[i].nMediaTypes = prf2->u.s1.rgPins[i].nMediaTypes;
 685             pregfp2[i].lpMediaType = prf2->u.s1.rgPins[i].lpMediaType;
 686             pregfp2[i].nMediums = 0;
 687             pregfp2[i].lpMedium = NULL;
 688             pregfp2[i].clsPinCategory = NULL;
 689         }
 690     }
 691     else
 692     {
 693         FIXME("dwVersion other that 1 or 2 not supported at the moment\n");
 694         return E_NOTIMPL;
 695     }
 696
 697     if (ppMoniker)
 698         *ppMoniker = NULL;
 699
 700     if (!pclsidCategory)
 701         /* MSDN mentions the inexistent CLSID_ActiveMovieFilters GUID.
 702          * In fact this is the CLSID_LegacyAmFilterCategory one */
 703         pclsidCategory = &CLSID_LegacyAmFilterCategory;
 704
 705     /* sizeof... will include the null terminator and
 706      * the + 1 is for the separator ('\\'). The -1 is
 707      * because CHARS_IN_GUID includes the null terminator
 708      */
 709     nameLen = sizeof(wszDevice)/sizeof(wszDevice[0]) + CHARS_IN_GUID - 1 + 1;
 710
 711     if (szInstance)
 712         nameLen += strlenW(szInstance);
 713     else
 714         nameLen += CHARS_IN_GUID - 1; /* CHARS_IN_GUID includes null terminator */
 715
 716     pCurrent = pwszParseName = CoTaskMemAlloc(nameLen*sizeof(WCHAR));
 717     if (!pwszParseName)
 718         return E_OUTOFMEMORY;
 719
 720     strcpyW(pwszParseName, wszDevice);
 721     pCurrent += strlenW(wszDevice);
 722
 723     hr = StringFromCLSID(pclsidCategory, &szClsidTemp);
 724
 725     if (SUCCEEDED(hr))
 726     {
 727         memcpy(pCurrent, szClsidTemp, CHARS_IN_GUID * sizeof(WCHAR));
 728         pCurrent += CHARS_IN_GUID - 1;
 729         pCurrent[0] = '\\';
 730
 731         if (szInstance)
 732             strcpyW(pCurrent+1, szInstance);
 733         else
 734         {
 735             CoTaskMemFree(szClsidTemp);
 736             szClsidTemp = NULL;
 737
 738             hr = StringFromCLSID(clsidFilter, &szClsidTemp);
 739             if (SUCCEEDED(hr))
 740                 strcpyW(pCurrent+1, szClsidTemp);
 741         }
 742     }
 743
 744     if (SUCCEEDED(hr))
 745         hr = CoCreateInstance(&CLSID_CDeviceMoniker, NULL, CLSCTX_INPROC, &IID_IParseDisplayName, (LPVOID *)&pParser);
 746
 747     if (SUCCEEDED(hr))
 748         hr = CreateBindCtx(0, &pBindCtx);
 749
 750     if (SUCCEEDED(hr))
 751         hr = IParseDisplayName_ParseDisplayName(pParser, pBindCtx, pwszParseName, &ulEaten, &pMoniker);
 752
 753     if (pBindCtx)
 754         IBindCtx_Release(pBindCtx);
 755     if (pParser)
 756         IParseDisplayName_Release(pParser);
 757
 758     if (SUCCEEDED(hr))
 759         hr = IMoniker_BindToStorage(pMoniker, NULL, NULL, &IID_IPropertyBag, (LPVOID)&pPropBag);
 760
 761     if (SUCCEEDED(hr))
 762         hr = FM2_WriteFriendlyName(pPropBag, szName);
 763
 764     if (SUCCEEDED(hr))
 765         hr = FM2_WriteClsid(pPropBag, clsidFilter);
 766
 767     if (SUCCEEDED(hr))
 768     {
 769         BYTE *pData;
 770         ULONG cbData;
 771
 772         hr = FM2_WriteFilterData(&regfilter2, &pData, &cbData);
 773         if (SUCCEEDED(hr))
 774         {
 775             VARIANT var;
 776             SAFEARRAY *psa;
 777             SAFEARRAYBOUND saBound;
 778
 779             saBound.lLbound = 0;
 780             saBound.cElements = cbData;
 781             psa = SafeArrayCreate(VT_UI1, 1, &saBound);
 782             if (!psa)
 783             {
 784                 ERR("Couldn't create SAFEARRAY\n");
 785                 hr = E_FAIL;
 786             }
 787
 788             if (SUCCEEDED(hr))
 789             {
 790                 LPBYTE pbSAData;
 791                 hr = SafeArrayAccessData(psa, (LPVOID *)&pbSAData);
 792                 if (SUCCEEDED(hr))
 793                 {
 794                     memcpy(pbSAData, pData, cbData);
 795                     hr = SafeArrayUnaccessData(psa);
 796                 }
 797             }
 798
 799             V_VT(&var) = VT_ARRAY | VT_UI1;
 800             V_UNION(&var, parray) = psa;
 801
 802             if (SUCCEEDED(hr))
 803                 hr = IPropertyBag_Write(pPropBag, wszFilterDataName, &var);
 804
 805             if (psa)
 806                 SafeArrayDestroy(psa);
 807             CoTaskMemFree(pData);
 808         }
 809     }
 810
 811     if (pPropBag)
 812         IPropertyBag_Release(pPropBag);
 813     CoTaskMemFree(szClsidTemp);
 814     CoTaskMemFree(pwszParseName);
 815
 816     if (SUCCEEDED(hr) && ppMoniker)
 817         *ppMoniker = pMoniker;
 818     else if (pMoniker)
 819         IMoniker_Release(pMoniker);
 820
 821     CoTaskMemFree(pregfp2);
 822
 823     TRACE("-- returning %x\n", hr);
 824
 825     return hr;
 826 }
 827
 828 /* internal helper function */
 829 static BOOL MatchTypes(
 830     BOOL bExactMatch,
 831     DWORD nPinTypes,
 832     const REGPINTYPES * pPinTypes,
 833     DWORD nMatchTypes,
 834     const GUID * pMatchTypes)
 835 {
 836     BOOL bMatch = FALSE;
 837     DWORD j;
 838
 839     if ((nMatchTypes == 0) && (nPinTypes > 0))
 840         bMatch = TRUE;
 841
 842     for (j = 0; j < nPinTypes; j++)
 843     {
 844         DWORD i;
 845         for (i = 0; i < nMatchTypes*2; i+=2)
 846         {
 847             if (((!bExactMatch && IsEqualGUID(pPinTypes[j].clsMajorType, &GUID_NULL)) || IsEqualGUID(&pMatchTypes[i], &GUID_NULL) || IsEqualGUID(pPinTypes[j].clsMajorType, &pMatchTypes[i])) &&
 848                 ((!bExactMatch && IsEqualGUID(pPinTypes[j].clsMinorType, &GUID_NULL)) || IsEqualGUID(&pMatchTypes[i+1], &GUID_NULL) || IsEqualGUID(pPinTypes[j].clsMinorType, &pMatchTypes[i+1])))
 849             {
 850                 bMatch = TRUE;
 851                 break;
 852             }
 853         }
 854     }
 855     return bMatch;
 856 }
 857
 858 /* internal helper function for qsort of MONIKER_MERIT array */
 859 static int mm_compare(const void * left, const void * right)
 860 {
 861     const struct MONIKER_MERIT * mmLeft = left;
 862     const struct MONIKER_MERIT * mmRight = right;
 863
 864     if (mmLeft->dwMerit == mmRight->dwMerit)
 865         return 0;
 866     if (mmLeft->dwMerit > mmRight->dwMerit)
 867         return -1;
 868     return 1;
 869 }
 870
 871 /* NOTES:
 872  *   Exact match means whether or not to treat GUID_NULL's in filter data as wild cards
 873  *    (GUID_NULL's in input to function automatically treated as wild cards)
 874  *   Input/Output needed means match only on criteria if TRUE (with zero input types
 875  *    meaning match any input/output pin as long as one exists), otherwise match any
 876  *    filter that meets the rest of the requirements.
 877  */
 878 static HRESULT WINAPI FilterMapper3_EnumMatchingFilters(
 879     IFilterMapper3 * iface,
 880     IEnumMoniker **ppEnum,
 881     DWORD dwFlags,
 882     BOOL bExactMatch,
 883     DWORD dwMerit,
 884     BOOL bInputNeeded,
 885     DWORD cInputTypes,
 886     const GUID *pInputTypes,
 887     const REGPINMEDIUM *pMedIn,
 888     const CLSID *pPinCategoryIn,
 889     BOOL bRender,
 890     BOOL bOutputNeeded,
 891     DWORD cOutputTypes,
 892     const GUID *pOutputTypes,
 893     const REGPINMEDIUM *pMedOut,
 894     const CLSID *pPinCategoryOut)
 895 {
 896     ICreateDevEnum * pCreateDevEnum;
 897     IMoniker * pMonikerCat;
 898     IEnumMoniker * pEnumCat;
 899     HRESULT hr;
 900     struct Vector monikers = {NULL, 0, 0};
 901
 902     TRACE("(%p, %x, %s, %x, %s, %d, %p, %p, %p, %s, %s, %p, %p, %p)\n",
 903         ppEnum,
 904         dwFlags,
 905         bExactMatch ? "true" : "false",
 906         dwMerit,
 907         bInputNeeded ? "true" : "false",
 908         cInputTypes,
 909         pInputTypes,
 910         pMedIn,
 911         pPinCategoryIn,
 912         bRender ? "true" : "false",
 913         bOutputNeeded ? "true" : "false",
 914         pOutputTypes,
 915         pMedOut,
 916         pPinCategoryOut);
 917
 918     if (dwFlags != 0)
 919     {
 920         FIXME("dwFlags = %x not implemented\n", dwFlags);
 921     }
 922
 923     *ppEnum = NULL;
 924
 925     hr = CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC, &IID_ICreateDevEnum, (LPVOID*)&pCreateDevEnum);
 926     if (FAILED(hr))
 927         return hr;
 928
 929     hr = ICreateDevEnum_CreateClassEnumerator(pCreateDevEnum, &CLSID_ActiveMovieCategories, &pEnumCat, 0);
 930     if (FAILED(hr)) {
 931         ICreateDevEnum_Release(pCreateDevEnum);
 932         return hr;
 933     }
 934
 935     while (IEnumMoniker_Next(pEnumCat, 1, &pMonikerCat, NULL) == S_OK)
 936     {
 937         IPropertyBag * pPropBagCat = NULL;
 938         VARIANT var;
 939         HRESULT hrSub; /* this is so that one buggy filter
 940                           doesn't make the whole lot fail */
 941
 942         VariantInit(&var);
 943
 944         hrSub = IMoniker_BindToStorage(pMonikerCat, NULL, NULL, &IID_IPropertyBag, (LPVOID*)&pPropBagCat);
 945
 946         if (SUCCEEDED(hrSub))
 947             hrSub = IPropertyBag_Read(pPropBagCat, wszMeritName, &var, NULL);
 948
 949         if (SUCCEEDED(hrSub) && (V_UNION(&var, ulVal) >= dwMerit))
 950         {
 951             CLSID clsidCat;
 952             IEnumMoniker * pEnum;
 953             IMoniker * pMoniker;
 954
 955             VariantClear(&var);
 956
 957             if (TRACE_ON(quartz))
 958             {
 959                 VARIANT temp;
 960                 V_VT(&temp) = VT_EMPTY;
 961                 IPropertyBag_Read(pPropBagCat, wszFriendlyName, &temp, NULL);
 962                 TRACE("Considering category %s\n", debugstr_w(V_UNION(&temp, bstrVal)));
 963                 VariantClear(&temp);
 964             }
 965
 966             hrSub = IPropertyBag_Read(pPropBagCat, wszClsidName, &var, NULL);
 967
 968             if (SUCCEEDED(hrSub))
 969                 hrSub = CLSIDFromString(V_UNION(&var, bstrVal), &clsidCat);
 970
 971             if (SUCCEEDED(hrSub))
 972                 hrSub = ICreateDevEnum_CreateClassEnumerator(pCreateDevEnum, &clsidCat, &pEnum, 0);
 973
 974             if (hrSub == S_OK)
 975             {
 976                 while (IEnumMoniker_Next(pEnum, 1, &pMoniker, NULL) == S_OK)
 977                 {
 978                     IPropertyBag * pPropBag = NULL;
 979                     VARIANT var;
 980                     BYTE *pData = NULL;
 981                     REGFILTER2 rf2;
 982                     DWORD i;
 983                     BOOL bInputMatch = !bInputNeeded;
 984                     BOOL bOutputMatch = !bOutputNeeded;
 985
 986                     ZeroMemory(&rf2, sizeof(rf2));
 987                     VariantInit(&var);
 988
 989                     hrSub = IMoniker_BindToStorage(pMoniker, NULL, NULL, &IID_IPropertyBag, (LPVOID*)&pPropBag);
 990
 991                     if (TRACE_ON(quartz))
 992                     {
 993                         VARIANT temp;
 994                         V_VT(&temp) = VT_EMPTY;
 995                         IPropertyBag_Read(pPropBag, wszFriendlyName, &temp, NULL);
 996                         TRACE("Considering filter %s\n", debugstr_w(V_UNION(&temp, bstrVal)));
 997                         VariantClear(&temp);
 998                     }
 999
1000                     if (SUCCEEDED(hrSub))
1001                     {
1002                         hrSub = IPropertyBag_Read(pPropBag, wszFilterDataName, &var, NULL);
1003                     }
1004
1005                     if (SUCCEEDED(hrSub))
1006                         hrSub = SafeArrayAccessData(V_UNION(&var, parray), (LPVOID*)&pData);
1007
1008                     if (SUCCEEDED(hrSub))
1009                         hrSub = FM2_ReadFilterData(pData, &rf2);
1010
1011                     if (pData)
1012                         SafeArrayUnaccessData(V_UNION(&var, parray));
1013
1014                     VariantClear(&var);
1015
1016                     /* Logic used for bInputMatch expression:
1017                      * There exists some pin such that bInputNeeded implies (pin is an input and
1018                      * (bRender implies pin has render flag) and major/minor types members of
1019                      * pInputTypes )
1020                      * bOutputMatch is similar, but without the "bRender implies ..." part
1021                      * and substituting variables names containing input for output
1022                      */
1023
1024                     /* determine whether filter meets requirements */
1025                     if (SUCCEEDED(hrSub) && (rf2.dwMerit >= dwMerit))
1026                     {
1027                         for (i = 0; (i < rf2.u.s2.cPins2) && (!bInputMatch || !bOutputMatch); i++)
1028                         {
1029                             const REGFILTERPINS2 * rfp2 = rf2.u.s2.rgPins2 + i;
1030
1031                             bInputMatch = bInputMatch || (!(rfp2->dwFlags & REG_PINFLAG_B_OUTPUT) &&
1032                                 (!bRender || (rfp2->dwFlags & REG_PINFLAG_B_RENDERER)) &&
1033                                 MatchTypes(bExactMatch, rfp2->nMediaTypes, rfp2->lpMediaType, cInputTypes, pInputTypes));
1034                             bOutputMatch = bOutputMatch || ((rfp2->dwFlags & REG_PINFLAG_B_OUTPUT) &&
1035                                 MatchTypes(bExactMatch, rfp2->nMediaTypes, rfp2->lpMediaType, cOutputTypes, pOutputTypes));
1036                         }
1037
1038                         if (bInputMatch && bOutputMatch)
1039                         {
1040                             struct MONIKER_MERIT mm = {pMoniker, rf2.dwMerit};
1041                             IMoniker_AddRef(pMoniker);
1042                             add_data(&monikers, (LPBYTE)&mm, sizeof(mm));
1043                         }
1044                     }
1045
1046                     FM2_DeleteRegFilter(&rf2);
1047                     if (pPropBag)
1048                         IPropertyBag_Release(pPropBag);
1049                     IMoniker_Release(pMoniker);
1050                 }
1051                 IEnumMoniker_Release(pEnum);
1052             }
1053         }
1054
1055         VariantClear(&var);
1056         if (pPropBagCat)
1057             IPropertyBag_Release(pPropBagCat);
1058         IMoniker_Release(pMonikerCat);
1059     }
1060
1061     if (SUCCEEDED(hr))
1062     {
1063         IMoniker ** ppMoniker;
1064         unsigned int i;
1065         ULONG nMonikerCount = monikers.current / sizeof(struct MONIKER_MERIT);
1066
1067         /* sort the monikers in descending merit order */
1068         qsort(monikers.pData, nMonikerCount,
1069               sizeof(struct MONIKER_MERIT),
1070               mm_compare);
1071
1072         /* construct an IEnumMoniker interface */
1073         ppMoniker = CoTaskMemAlloc(nMonikerCount * sizeof(IMoniker *));
1074         for (i = 0; i < nMonikerCount; i++)
1075         {
1076             /* no need to AddRef here as already AddRef'd above */
1077             ppMoniker[i] = ((struct MONIKER_MERIT *)monikers.pData)[i].pMoniker;
1078         }
1079         hr = EnumMonikerImpl_Create(ppMoniker, nMonikerCount, ppEnum);
1080         CoTaskMemFree(ppMoniker);
1081     }
1082
1083     delete_vector(&monikers);
1084     IEnumMoniker_Release(pEnumCat);
1085     ICreateDevEnum_Release(pCreateDevEnum);
1086
1087     return hr;
1088 }
1089
1090 static HRESULT WINAPI FilterMapper3_GetICreateDevEnum(IFilterMapper3 *iface, ICreateDevEnum **ppEnum)
1091 {
1092     TRACE("(%p, %p)\n", iface, ppEnum);
1093     if (!ppEnum)
1094         return E_POINTER;
1095     return CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC, &IID_ICreateDevEnum, (void**)ppEnum);
1096 }
1097
1098 static const IFilterMapper3Vtbl fm3vtbl =
1099 {
1100
1101     FilterMapper3_QueryInterface,
1102     FilterMapper3_AddRef,
1103     FilterMapper3_Release,
1104
1105     FilterMapper3_CreateCategory,
1106     FilterMapper3_UnregisterFilter,
1107     FilterMapper3_RegisterFilter,
1108     FilterMapper3_EnumMatchingFilters,
1109     FilterMapper3_GetICreateDevEnum
1110 };
1111
1112 /*** IUnknown methods ***/
1113
1114 static HRESULT WINAPI FilterMapper_QueryInterface(IFilterMapper * iface, REFIID riid, LPVOID *ppv)
1115 {
1116     FilterMapper3Impl *This = impl_from_IFilterMapper(iface);
1117
1118     TRACE("(%p)->(%s, %p)\n", This, debugstr_guid(riid), ppv);
1119
1120     return FilterMapper3_QueryInterface(&This->IFilterMapper3_iface, riid, ppv);
1121 }
1122
1123 static ULONG WINAPI FilterMapper_AddRef(IFilterMapper * iface)
1124 {
1125     FilterMapper3Impl *This = impl_from_IFilterMapper(iface);
1126
1127     return IUnknown_AddRef(This->outer_unk);
1128 }
1129
1130 static ULONG WINAPI FilterMapper_Release(IFilterMapper * iface)
1131 {
1132     FilterMapper3Impl *This = impl_from_IFilterMapper(iface);
1133
1134     return IUnknown_Release(This->outer_unk);
1135 }
1136
1137 /*** IFilterMapper methods ***/
1138
1139 static HRESULT WINAPI FilterMapper_EnumMatchingFilters(
1140     IFilterMapper * iface,
1141     IEnumRegFilters **ppEnum,
1142     DWORD dwMerit,
1143     BOOL bInputNeeded,
1144     CLSID clsInMaj,
1145     CLSID clsInSub,
1146     BOOL bRender,
1147     BOOL bOutputNeeded,
1148     CLSID clsOutMaj,
1149     CLSID clsOutSub)
1150 {
1151     FilterMapper3Impl *This = impl_from_IFilterMapper(iface);
1152     GUID InputType[2];
1153     GUID OutputType[2];
1154     IEnumMoniker* ppEnumMoniker;
1155     IMoniker* IMon;
1156     ULONG nb;
1157     ULONG idx = 0, nb_mon = 0;
1158     REGFILTER* regfilters;
1159     HRESULT hr;
1160
1161     TRACE("(%p/%p)->(%p, %x, %s, %s, %s, %s, %s, %s, %s) stub!\n",
1162         iface,This,
1163         ppEnum,
1164         dwMerit,
1165         bInputNeeded ? "true" : "false",
1166         debugstr_guid(&clsInMaj),
1167         debugstr_guid(&clsInSub),
1168         bRender ? "true" : "false",
1169         bOutputNeeded ? "true" : "false",
1170         debugstr_guid(&clsOutMaj),
1171         debugstr_guid(&clsOutSub));
1172
1173     InputType[0] = clsInMaj;
1174     InputType[1] = clsInSub;
1175     OutputType[0] = clsOutMaj;
1176     OutputType[1] = clsOutSub;
1177
1178     *ppEnum = NULL;
1179
1180     hr = IFilterMapper3_EnumMatchingFilters(&This->IFilterMapper3_iface, &ppEnumMoniker, 0, TRUE,
1181             dwMerit, bInputNeeded, 1, InputType, NULL, &GUID_NULL, bRender, bOutputNeeded, 1,
1182             OutputType, NULL, &GUID_NULL);
1183
1184     if (FAILED(hr))
1185         return hr;
1186
1187     while(IEnumMoniker_Next(ppEnumMoniker, 1, &IMon, &nb) == S_OK)
1188     {
1189         IMoniker_Release(IMon);
1190         nb_mon++;
1191     }
1192
1193     if (!nb_mon)
1194     {
1195         IEnumMoniker_Release(ppEnumMoniker);
1196         return IEnumRegFiltersImpl_Construct(NULL, 0, ppEnum);
1197     }
1198
1199     regfilters = CoTaskMemAlloc(nb_mon * sizeof(REGFILTER));
1200     if (!regfilters)
1201     {
1202         IEnumMoniker_Release(ppEnumMoniker);
1203         return E_OUTOFMEMORY;
1204     }
1205     ZeroMemory(regfilters, nb_mon * sizeof(REGFILTER)); /* will prevent bad free of Name in case of error. */
1206
1207     IEnumMoniker_Reset(ppEnumMoniker);
1208     while(IEnumMoniker_Next(ppEnumMoniker, 1, &IMon, &nb) == S_OK)
1209     {
1210         IPropertyBag * pPropBagCat = NULL;
1211         VARIANT var;
1212         HRESULT hrSub;
1213         GUID clsid;
1214         int len;
1215
1216         VariantInit(&var);
1217
1218         hrSub = IMoniker_BindToStorage(IMon, NULL, NULL, &IID_IPropertyBag, (LPVOID*)&pPropBagCat);
1219
1220         if (SUCCEEDED(hrSub))
1221             hrSub = IPropertyBag_Read(pPropBagCat, wszClsidName, &var, NULL);
1222
1223         if (SUCCEEDED(hrSub))
1224             hrSub = CLSIDFromString(V_UNION(&var, bstrVal), &clsid);
1225
1226         VariantClear(&var);
1227
1228         if (SUCCEEDED(hrSub))
1229             hrSub = IPropertyBag_Read(pPropBagCat, wszFriendlyName, &var, NULL);
1230
1231         if (SUCCEEDED(hrSub))
1232         {
1233             len = (strlenW(V_UNION(&var, bstrVal))+1) * sizeof(WCHAR);
1234             if (!(regfilters[idx].Name = CoTaskMemAlloc(len*2)))
1235                 hr = E_OUTOFMEMORY;
1236         }
1237
1238         if (SUCCEEDED(hrSub) && regfilters[idx].Name)
1239         {
1240             memcpy(regfilters[idx].Name, V_UNION(&var, bstrVal), len);
1241             regfilters[idx].Clsid = clsid;
1242             idx++;
1243         }
1244
1245         if (pPropBagCat)
1246             IPropertyBag_Release(pPropBagCat);
1247         IMoniker_Release(IMon);
1248         VariantClear(&var);
1249     }
1250
1251     if (SUCCEEDED(hr))
1252     {
1253         hr = IEnumRegFiltersImpl_Construct(regfilters, nb_mon, ppEnum);
1254     }
1255
1256     for (idx = 0; idx < nb_mon; idx++)
1257         CoTaskMemFree(regfilters[idx].Name);
1258     CoTaskMemFree(regfilters);
1259     IEnumMoniker_Release(ppEnumMoniker);
1260
1261     return hr;
1262 }
1263
1264
1265 static HRESULT WINAPI FilterMapper_RegisterFilter(IFilterMapper * iface, CLSID clsid, LPCWSTR szName, DWORD dwMerit)
1266 {
1267     HRESULT hr;
1268     LPWSTR wszClsid = NULL;
1269     HKEY hKey;
1270     LONG lRet;
1271     WCHAR wszKeyName[ARRAYSIZE(wszFilterSlash)-1 + (CHARS_IN_GUID-1) + 1];
1272
1273     TRACE("(%p)->(%s, %s, %x)\n", iface, debugstr_guid(&clsid), debugstr_w(szName), dwMerit);
1274
1275     hr = StringFromCLSID(&clsid, &wszClsid);
1276
1277     if (SUCCEEDED(hr))
1278     {
1279         strcpyW(wszKeyName, wszFilterSlash);
1280         strcatW(wszKeyName, wszClsid);
1281
1282         lRet = RegCreateKeyExW(HKEY_CLASSES_ROOT, wszKeyName, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey, NULL);
1283         hr = HRESULT_FROM_WIN32(lRet);
1284     }
1285
1286     if (SUCCEEDED(hr))
1287     {
1288         lRet = RegSetValueExW(hKey, NULL, 0, REG_SZ, (const BYTE*)szName, (strlenW(szName) + 1) * sizeof(WCHAR));
1289         hr = HRESULT_FROM_WIN32(lRet);
1290         RegCloseKey(hKey);
1291     }
1292
1293     if (SUCCEEDED(hr))
1294     {
1295         strcpyW(wszKeyName, wszClsidSlash);
1296         strcatW(wszKeyName, wszClsid);
1297
1298         lRet = RegCreateKeyExW(HKEY_CLASSES_ROOT, wszKeyName, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey, NULL);
1299         hr = HRESULT_FROM_WIN32(lRet);
1300     }
1301
1302     if (SUCCEEDED(hr))
1303     {
1304         lRet = RegSetValueExW(hKey, wszMeritName, 0, REG_DWORD, (LPBYTE)&dwMerit, sizeof(dwMerit));
1305         hr = HRESULT_FROM_WIN32(lRet);
1306         RegCloseKey(hKey);
1307     }
1308
1309     CoTaskMemFree(wszClsid);
1310
1311     return hr;
1312 }
1313
1314 static HRESULT WINAPI FilterMapper_RegisterFilterInstance(IFilterMapper * iface, CLSID clsid, LPCWSTR szName, CLSID *MRId)
1315 {
1316     TRACE("(%p)->(%s, %s, %p)\n", iface, debugstr_guid(&clsid), debugstr_w(szName), MRId);
1317
1318     /* Not implemented in Windows (tested on Win2k) */
1319
1320     return E_NOTIMPL;
1321 }
1322
1323 static HRESULT WINAPI FilterMapper_RegisterPin(
1324     IFilterMapper * iface,
1325     CLSID Filter,
1326     LPCWSTR szName,
1327     BOOL bRendered,
1328     BOOL bOutput,
1329     BOOL bZero,
1330     BOOL bMany,
1331     CLSID ConnectsToFilter,
1332     LPCWSTR ConnectsToPin)
1333 {
1334     HRESULT hr;
1335     LONG lRet;
1336     LPWSTR wszClsid = NULL;
1337     HKEY hKey = NULL;
1338     HKEY hPinsKey = NULL;
1339     WCHAR * wszPinsKeyName;
1340     WCHAR wszKeyName[ARRAYSIZE(wszClsidSlash)-1 + (CHARS_IN_GUID-1) + 1];
1341
1342     TRACE("(%p)->(%s, %s, %d, %d, %d, %d, %s, %s)\n", iface, debugstr_guid(&Filter), debugstr_w(szName), bRendered,
1343                 bOutput, bZero, bMany, debugstr_guid(&ConnectsToFilter), debugstr_w(ConnectsToPin));
1344
1345     hr = StringFromCLSID(&Filter, &wszClsid);
1346
1347     if (SUCCEEDED(hr))
1348     {
1349         strcpyW(wszKeyName, wszClsidSlash);
1350         strcatW(wszKeyName, wszClsid);
1351
1352         lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszKeyName, 0, KEY_WRITE, &hKey);
1353         hr = HRESULT_FROM_WIN32(lRet);
1354     }
1355
1356     if (SUCCEEDED(hr))
1357     {
1358         wszPinsKeyName = CoTaskMemAlloc((strlenW(wszPins) + 1 + strlenW(szName) + 1) * 2);
1359         if (!wszPinsKeyName)
1360              hr = E_OUTOFMEMORY;
1361     }
1362
1363     if (SUCCEEDED(hr))
1364     {
1365         strcpyW(wszPinsKeyName, wszPins);
1366         strcatW(wszPinsKeyName, wszSlash);
1367         strcatW(wszPinsKeyName, szName);
1368
1369         lRet = RegCreateKeyExW(hKey, wszPinsKeyName, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hPinsKey, NULL);
1370         hr = HRESULT_FROM_WIN32(lRet);
1371         CoTaskMemFree(wszPinsKeyName);
1372     }
1373
1374     if (SUCCEEDED(hr))
1375     {
1376         lRet = RegSetValueExW(hPinsKey, wszAllowedMany, 0, REG_DWORD, (LPBYTE)&bMany, sizeof(bMany));
1377         hr = HRESULT_FROM_WIN32(lRet);
1378     }
1379
1380     if (SUCCEEDED(hr))
1381     {
1382         lRet = RegSetValueExW(hPinsKey, wszAllowedZero, 0, REG_DWORD, (LPBYTE)&bZero, sizeof(bZero));
1383         hr = HRESULT_FROM_WIN32(lRet);
1384     }
1385
1386     if (SUCCEEDED(hr))
1387     {
1388         lRet = RegSetValueExW(hPinsKey, wszDirection, 0, REG_DWORD, (LPBYTE)&bOutput, sizeof(bOutput));
1389         hr = HRESULT_FROM_WIN32(lRet);
1390     }
1391
1392     if (SUCCEEDED(hr))
1393     {
1394         lRet = RegSetValueExW(hPinsKey, wszIsRendered, 0, REG_DWORD, (LPBYTE)&bRendered, sizeof(bRendered));
1395         hr = HRESULT_FROM_WIN32(lRet);
1396     }
1397
1398     if (SUCCEEDED(hr))
1399     {
1400         HKEY hkeyDummy = NULL;
1401
1402         lRet = RegCreateKeyExW(hPinsKey, wszTypes, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hkeyDummy, NULL);
1403         hr = HRESULT_FROM_WIN32(lRet);
1404
1405         if (hkeyDummy) RegCloseKey(hkeyDummy);
1406     }
1407
1408     CoTaskMemFree(wszClsid);
1409     if (hKey)
1410         RegCloseKey(hKey);
1411     if (hPinsKey)
1412         RegCloseKey(hPinsKey);
1413
1414     return hr;
1415 }
1416
1417
1418 static HRESULT WINAPI FilterMapper_RegisterPinType(
1419     IFilterMapper * iface,
1420     CLSID clsFilter,
1421     LPCWSTR szName,
1422     CLSID clsMajorType,
1423     CLSID clsSubType)
1424 {
1425     HRESULT hr;
1426     LONG lRet;
1427     LPWSTR wszClsid = NULL;
1428     LPWSTR wszClsidMajorType = NULL;
1429     LPWSTR wszClsidSubType = NULL;
1430     HKEY hKey = NULL;
1431     WCHAR * wszTypesKey;
1432     WCHAR wszKeyName[MAX_PATH];
1433
1434     TRACE("(%p)->(%s, %s, %s, %s)\n", iface, debugstr_guid(&clsFilter), debugstr_w(szName),
1435                     debugstr_guid(&clsMajorType), debugstr_guid(&clsSubType));
1436
1437     hr = StringFromCLSID(&clsFilter, &wszClsid);
1438
1439     if (SUCCEEDED(hr))
1440     {
1441         hr = StringFromCLSID(&clsMajorType, &wszClsidMajorType);
1442     }
1443
1444     if (SUCCEEDED(hr))
1445     {
1446         hr = StringFromCLSID(&clsSubType, &wszClsidSubType);
1447     }
1448
1449     if (SUCCEEDED(hr))
1450     {
1451         wszTypesKey = CoTaskMemAlloc((strlenW(wszClsidSlash) + strlenW(wszClsid) + strlenW(wszPins) +
1452                         strlenW(szName) + strlenW(wszTypes) + 3 + 1) * 2);
1453         if (!wszTypesKey)
1454             hr = E_OUTOFMEMORY;
1455     }
1456
1457     if (SUCCEEDED(hr))
1458     {
1459         strcpyW(wszTypesKey, wszClsidSlash);
1460         strcatW(wszTypesKey, wszClsid);
1461         strcatW(wszTypesKey, wszSlash);
1462         strcatW(wszTypesKey, wszPins);
1463         strcatW(wszTypesKey, wszSlash);
1464         strcatW(wszTypesKey, szName);
1465         strcatW(wszTypesKey, wszSlash);
1466         strcatW(wszTypesKey, wszTypes);
1467
1468         lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszTypesKey, 0, KEY_WRITE, &hKey);
1469         hr = HRESULT_FROM_WIN32(lRet);
1470         CoTaskMemFree(wszTypesKey);
1471     }
1472
1473     if (SUCCEEDED(hr))
1474     {
1475         HKEY hkeyDummy = NULL;
1476
1477         strcpyW(wszKeyName, wszClsidMajorType);
1478         strcatW(wszKeyName, wszSlash);
1479         strcatW(wszKeyName, wszClsidSubType);
1480
1481         lRet = RegCreateKeyExW(hKey, wszKeyName, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hkeyDummy, NULL);
1482         hr = HRESULT_FROM_WIN32(lRet);
1483         RegCloseKey(hKey);
1484
1485         if (hkeyDummy) RegCloseKey(hkeyDummy);
1486     }
1487
1488     CoTaskMemFree(wszClsid);
1489     CoTaskMemFree(wszClsidMajorType);
1490     CoTaskMemFree(wszClsidSubType);
1491
1492     return hr;
1493 }
1494
1495 static HRESULT WINAPI FilterMapper_UnregisterFilter(IFilterMapper * iface, CLSID Filter)
1496 {
1497     HRESULT hr;
1498     LONG lRet;
1499     LPWSTR wszClsid = NULL;
1500     HKEY hKey;
1501     WCHAR wszKeyName[ARRAYSIZE(wszClsidSlash)-1 + (CHARS_IN_GUID-1) + 1];
1502
1503     TRACE("(%p)->(%s)\n", iface, debugstr_guid(&Filter));
1504
1505     hr = StringFromCLSID(&Filter, &wszClsid);
1506
1507     if (SUCCEEDED(hr))
1508     {
1509         lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszFilter, 0, KEY_WRITE, &hKey);
1510         hr = HRESULT_FROM_WIN32(lRet);
1511     }
1512
1513     if (SUCCEEDED(hr))
1514     {
1515         lRet = RegDeleteKeyW(hKey, wszClsid);
1516         hr = HRESULT_FROM_WIN32(lRet);
1517         RegCloseKey(hKey);
1518     }
1519
1520     if (SUCCEEDED(hr))
1521     {
1522         strcpyW(wszKeyName, wszClsidSlash);
1523         strcatW(wszKeyName, wszClsid);
1524
1525         lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszKeyName, 0, KEY_WRITE, &hKey);
1526         hr = HRESULT_FROM_WIN32(lRet);
1527     }
1528
1529     if (SUCCEEDED(hr))
1530     {
1531         lRet = RegDeleteValueW(hKey, wszMeritName);
1532         if (lRet != ERROR_SUCCESS)
1533             hr = HRESULT_FROM_WIN32(lRet);
1534
1535         lRet = RegDeleteTreeW(hKey, wszPins);
1536         if (lRet != ERROR_SUCCESS)
1537             hr = HRESULT_FROM_WIN32(lRet);
1538
1539         RegCloseKey(hKey);
1540     }
1541
1542     CoTaskMemFree(wszClsid);
1543
1544     return hr;
1545 }
1546
1547 static HRESULT WINAPI FilterMapper_UnregisterFilterInstance(IFilterMapper * iface, CLSID MRId)
1548 {
1549     TRACE("(%p)->(%s)\n", iface, debugstr_guid(&MRId));
1550
1551     /* Not implemented in Windows (tested on Win2k) */
1552
1553     return E_NOTIMPL;
1554 }
1555
1556 static HRESULT WINAPI FilterMapper_UnregisterPin(IFilterMapper * iface, CLSID Filter, LPCWSTR Name)
1557 {
1558     HRESULT hr;
1559     LONG lRet;
1560     LPWSTR wszClsid = NULL;
1561     HKEY hKey = NULL;
1562     WCHAR * wszPinNameKey;
1563     WCHAR wszKeyName[ARRAYSIZE(wszClsidSlash)-1 + (CHARS_IN_GUID-1) + 1];
1564
1565     TRACE("(%p)->(%s, %s)\n", iface, debugstr_guid(&Filter), debugstr_w(Name));
1566
1567     if (!Name)
1568         return E_INVALIDARG;
1569
1570     hr = StringFromCLSID(&Filter, &wszClsid);
1571
1572     if (SUCCEEDED(hr))
1573     {
1574         strcpyW(wszKeyName, wszClsidSlash);
1575         strcatW(wszKeyName, wszClsid);
1576
1577         lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszKeyName, 0, KEY_WRITE, &hKey);
1578         hr = HRESULT_FROM_WIN32(lRet);
1579     }
1580
1581     if (SUCCEEDED(hr))
1582     {
1583         wszPinNameKey = CoTaskMemAlloc((strlenW(wszPins) + 1 + strlenW(Name) + 1) * 2);
1584         if (!wszPinNameKey)
1585             hr = E_OUTOFMEMORY;
1586     }
1587
1588     if (SUCCEEDED(hr))
1589     {
1590         strcpyW(wszPinNameKey, wszPins);
1591         strcatW(wszPinNameKey, wszSlash);
1592         strcatW(wszPinNameKey, Name);
1593
1594         lRet = RegDeleteTreeW(hKey, wszPinNameKey);
1595         hr = HRESULT_FROM_WIN32(lRet);
1596         CoTaskMemFree(wszPinNameKey);
1597     }
1598
1599     CoTaskMemFree(wszClsid);
1600     if (hKey)
1601         RegCloseKey(hKey);
1602
1603     return hr;
1604 }
1605
1606 static const IFilterMapperVtbl fmvtbl =
1607 {
1608
1609     FilterMapper_QueryInterface,
1610     FilterMapper_AddRef,
1611     FilterMapper_Release,
1612
1613     FilterMapper_RegisterFilter,
1614     FilterMapper_RegisterFilterInstance,
1615     FilterMapper_RegisterPin,
1616     FilterMapper_RegisterPinType,
1617     FilterMapper_UnregisterFilter,
1618     FilterMapper_UnregisterFilterInstance,
1619     FilterMapper_UnregisterPin,
1620     FilterMapper_EnumMatchingFilters
1621 };
1622
1623
1624 /*** IUnknown methods ***/
1625 static HRESULT WINAPI AMFilterData_QueryInterface(IAMFilterData * iface, REFIID riid, LPVOID *ppv)
1626 {
1627     FilterMapper3Impl *This = impl_from_IAMFilterData(iface);
1628
1629     return IUnknown_QueryInterface(This->outer_unk, riid, ppv);
1630 }
1631
1632 static ULONG WINAPI AMFilterData_AddRef(IAMFilterData * iface)
1633 {
1634     FilterMapper3Impl *This = impl_from_IAMFilterData(iface);
1635
1636     return IUnknown_AddRef(This->outer_unk);
1637 }
1638
1639 static ULONG WINAPI AMFilterData_Release(IAMFilterData * iface)
1640 {
1641     FilterMapper3Impl *This = impl_from_IAMFilterData(iface);
1642
1643     return IUnknown_Release(This->outer_unk);
1644 }
1645
1646 /*** IAMFilterData methods ***/
1647 static HRESULT WINAPI AMFilterData_ParseFilterData(IAMFilterData* iface,
1648                                                    BYTE *pData, ULONG cb,
1649                                                    BYTE **ppRegFilter2)
1650 {
1651     FilterMapper3Impl *This = impl_from_IAMFilterData(iface);
1652     HRESULT hr = S_OK;
1653     static REGFILTER2 *prf2;
1654
1655     TRACE("(%p/%p)->(%p, %d, %p)\n", This, iface, pData, cb, ppRegFilter2);
1656
1657     prf2 = CoTaskMemAlloc(sizeof(*prf2));
1658     if (!prf2)
1659         return E_OUTOFMEMORY;
1660     *ppRegFilter2 = (BYTE *)&prf2;
1661
1662     hr = FM2_ReadFilterData(pData, prf2);
1663     if (FAILED(hr))
1664     {
1665         CoTaskMemFree(prf2);
1666         *ppRegFilter2 = NULL;
1667     }
1668
1669     return hr;
1670 }
1671
1672 static HRESULT WINAPI AMFilterData_CreateFilterData(IAMFilterData* iface,
1673                                                     REGFILTER2 *prf2,
1674                                                     BYTE **pRegFilterData,
1675                                                     ULONG *pcb)
1676 {
1677     FilterMapper3Impl *This = impl_from_IAMFilterData(iface);
1678
1679     TRACE("(%p/%p)->(%p, %p, %p)\n", This, iface, prf2, pRegFilterData, pcb);
1680
1681     return FM2_WriteFilterData(prf2, pRegFilterData, pcb);
1682 }
1683
1684 static const IAMFilterDataVtbl AMFilterDataVtbl = {
1685     AMFilterData_QueryInterface,
1686     AMFilterData_AddRef,
1687     AMFilterData_Release,
1688     AMFilterData_ParseFilterData,
1689     AMFilterData_CreateFilterData
1690 };
1691
1692 HRESULT FilterMapper2_create(IUnknown *pUnkOuter, LPVOID *ppObj)
1693 {
1694     FilterMapper3Impl * pFM2impl;
1695
1696     TRACE("(%p, %p)\n", pUnkOuter, ppObj);
1697
1698     pFM2impl = CoTaskMemAlloc(sizeof(*pFM2impl));
1699     if (!pFM2impl)
1700         return E_OUTOFMEMORY;
1701
1702     pFM2impl->IUnknown_inner.lpVtbl = &IInner_VTable;
1703     pFM2impl->IFilterMapper3_iface.lpVtbl = &fm3vtbl;
1704     pFM2impl->IFilterMapper_iface.lpVtbl = &fmvtbl;
1705     pFM2impl->IAMFilterData_iface.lpVtbl = &AMFilterDataVtbl;
1706     pFM2impl->ref = 1;
1707
1708     if (pUnkOuter)
1709         pFM2impl->outer_unk = pUnkOuter;
1710     else
1711         pFM2impl->outer_unk = &pFM2impl->IUnknown_inner;
1712
1713     *ppObj = &pFM2impl->IUnknown_inner;
1714
1715     TRACE("-- created at %p\n", pFM2impl);
1716
1717     return S_OK;
1718 }
1719
1720 HRESULT FilterMapper_create(IUnknown *pUnkOuter, LPVOID *ppObj)
1721 {
1722     FilterMapper3Impl *pFM2impl;
1723     HRESULT hr;
1724
1725     TRACE("(%p, %p)\n", pUnkOuter, ppObj);
1726
1727     hr = FilterMapper2_create(pUnkOuter, (LPVOID*)&pFM2impl);
1728     if (FAILED(hr))
1729         return hr;
1730
1731     *ppObj = &pFM2impl->IFilterMapper_iface;
1732
1733     return hr;
1734 }