dlls/quartz/filesource.c

   1 /*
   2  * File Source Filter
   3  *
   4  * Copyright 2003 Robert Shearman
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define NONAMELESSUNION
  22 #define NONAMELESSSTRUCT
  23
  24 #include "quartz_private.h"
  25
  26 #include "wine/debug.h"
  27 #include "wine/unicode.h"
  28 #include "pin.h"
  29 #include "uuids.h"
  30 #include "vfwmsgs.h"
  31 #include "winbase.h"
  32 #include "winreg.h"
  33 #include <assert.h>
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  36
  37 static const WCHAR wszOutputPinName[] = { 'O','u','t','p','u','t',0 };
  38
  39 typedef struct AsyncReader
  40 {
  41     const IBaseFilterVtbl * lpVtbl;
  42     const IFileSourceFilterVtbl * lpVtblFSF;
  43
  44     LONG refCount;
  45     FILTER_INFO filterInfo;
  46     FILTER_STATE state;
  47     CRITICAL_SECTION csFilter;
  48
  49     IPin * pOutputPin;
  50     LPOLESTR pszFileName;
  51     AM_MEDIA_TYPE * pmt;
  52 } AsyncReader;
  53
  54 static const IBaseFilterVtbl AsyncReader_Vtbl;
  55 static const IFileSourceFilterVtbl FileSource_Vtbl;
  56 static const IAsyncReaderVtbl FileAsyncReader_Vtbl;
  57
  58 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
  59
  60 static inline AsyncReader *impl_from_IFileSourceFilter( IFileSourceFilter *iface )
  61 {
  62     return (AsyncReader *)((char*)iface - FIELD_OFFSET(AsyncReader, lpVtblFSF));
  63 }
  64
  65 static HRESULT process_extensions(HKEY hkeyExtensions, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType)
  66 {
  67     /* FIXME: implement */
  68     return E_NOTIMPL;
  69 }
  70
  71 static unsigned char byte_from_hex_char(WCHAR wHex)
  72 {
  73     switch (tolowerW(wHex))
  74     {
  75     case '0':
  76     case '1':
  77     case '2':
  78     case '3':
  79     case '4':
  80     case '5':
  81     case '6':
  82     case '7':
  83     case '8':
  84     case '9':
  85         return (wHex - '0') & 0xf;
  86     case 'a':
  87     case 'b':
  88     case 'c':
  89     case 'd':
  90     case 'e':
  91     case 'f':
  92         return (wHex - 'a' + 10) & 0xf;
  93     default:
  94         return 0;
  95     }
  96 }
  97
  98 static HRESULT process_pattern_string(LPCWSTR wszPatternString, IAsyncReader * pReader)
  99 {
 100     ULONG ulOffset;
 101     ULONG ulBytes;
 102     BYTE * pbMask;
 103     BYTE * pbValue;
 104     BYTE * pbFile;
 105     HRESULT hr = S_OK;
 106     ULONG strpos;
 107
 108     TRACE("\t\tPattern string: %s\n", debugstr_w(wszPatternString));
 109
 110     /* format: "offset, bytestocompare, mask, value" */
 111
 112     ulOffset = strtolW(wszPatternString, NULL, 10);
 113
 114     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 115         return E_INVALIDARG;
 116
 117     wszPatternString++; /* skip ',' */
 118
 119     ulBytes = strtolW(wszPatternString, NULL, 10);
 120
 121     pbMask = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 122     pbValue = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, ulBytes);
 123     pbFile = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 124
 125     /* default mask is match everything */
 126     memset(pbMask, 0xFF, ulBytes);
 127
 128     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 129         hr = E_INVALIDARG;
 130
 131     wszPatternString++; /* skip ',' */
 132
 133     if (hr == S_OK)
 134     {
 135         for ( ; !isxdigitW(*wszPatternString) && (*wszPatternString != ','); wszPatternString++)
 136             ;
 137
 138         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 139         {
 140             if ((strpos % 2) == 1) /* odd numbered position */
 141                 pbMask[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 142             else
 143                 pbMask[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 144         }
 145
 146         if (!(wszPatternString = strchrW(wszPatternString, ',')))
 147             hr = E_INVALIDARG;
 148
 149         wszPatternString++; /* skip ',' */
 150     }
 151
 152     if (hr == S_OK)
 153     {
 154         for ( ; !isxdigitW(*wszPatternString) && (*wszPatternString != ','); wszPatternString++)
 155             ;
 156
 157         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 158         {
 159             if ((strpos % 2) == 1) /* odd numbered position */
 160                 pbValue[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 161             else
 162                 pbValue[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 163         }
 164     }
 165
 166     if (hr == S_OK)
 167         hr = IAsyncReader_SyncRead(pReader, ulOffset, ulBytes, pbFile);
 168
 169     if (hr == S_OK)
 170     {
 171         ULONG i;
 172         for (i = 0; i < ulBytes; i++)
 173             if ((pbFile[i] & pbMask[i]) != pbValue[i])
 174             {
 175                 hr = S_FALSE;
 176                 break;
 177             }
 178     }
 179
 180     HeapFree(GetProcessHeap(), 0, pbMask);
 181     HeapFree(GetProcessHeap(), 0, pbValue);
 182     HeapFree(GetProcessHeap(), 0, pbFile);
 183
 184     /* if we encountered no errors with this string, and there is a following tuple, then we
 185      * have to match that as well to succeed */
 186     if ((hr == S_OK) && (wszPatternString = strchrW(wszPatternString, ',')))
 187         return process_pattern_string(wszPatternString + 1, pReader);
 188     else
 189         return hr;
 190 }
 191
 192 static HRESULT GetClassMediaFile(IAsyncReader * pReader, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType)
 193 {
 194     HKEY hkeyMediaType = NULL;
 195     LONG lRet;
 196     HRESULT hr = S_OK;
 197     BOOL bFound = FALSE;
 198     static const WCHAR wszMediaType[] = {'M','e','d','i','a',' ','T','y','p','e',0};
 199
 200     CopyMemory(majorType, &GUID_NULL, sizeof(*majorType));
 201     CopyMemory(minorType, &GUID_NULL, sizeof(*minorType));
 202
 203     lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszMediaType, 0, KEY_READ, &hkeyMediaType);
 204     hr = HRESULT_FROM_WIN32(lRet);
 205
 206     if (SUCCEEDED(hr))
 207     {
 208         DWORD indexMajor;
 209
 210         for (indexMajor = 0; !bFound; indexMajor++)
 211         {
 212             HKEY hkeyMajor;
 213             WCHAR wszMajorKeyName[CHARS_IN_GUID];
 214             DWORD dwKeyNameLength = sizeof(wszMajorKeyName) / sizeof(wszMajorKeyName[0]);
 215             static const WCHAR wszExtensions[] = {'E','x','t','e','n','s','i','o','n','s',0};
 216
 217             if (RegEnumKeyExW(hkeyMediaType, indexMajor, wszMajorKeyName, &dwKeyNameLength, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 218                 break;
 219             if (RegOpenKeyExW(hkeyMediaType, wszMajorKeyName, 0, KEY_READ, &hkeyMajor) != ERROR_SUCCESS)
 220                 break;
 221             TRACE("%s\n", debugstr_w(wszMajorKeyName));
 222             if (!strcmpW(wszExtensions, wszMajorKeyName))
 223             {
 224                 if (process_extensions(hkeyMajor, pszFileName, majorType, minorType) == S_OK)
 225                     bFound = TRUE;
 226             }
 227             else
 228             {
 229                 DWORD indexMinor;
 230
 231                 for (indexMinor = 0; !bFound; indexMinor++)
 232                 {
 233                     HKEY hkeyMinor;
 234                     WCHAR wszMinorKeyName[CHARS_IN_GUID];
 235                     DWORD dwMinorKeyNameLen = sizeof(wszMinorKeyName) / sizeof(wszMinorKeyName[0]);
 236                     DWORD maxValueLen;
 237                     DWORD indexValue;
 238
 239                     if (RegEnumKeyExW(hkeyMajor, indexMinor, wszMinorKeyName, &dwMinorKeyNameLen, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 240                         break;
 241
 242                     if (RegOpenKeyExW(hkeyMajor, wszMinorKeyName, 0, KEY_READ, &hkeyMinor) != ERROR_SUCCESS)
 243                         break;
 244
 245                     TRACE("\t%s\n", debugstr_w(wszMinorKeyName));
 246
 247                     if (RegQueryInfoKeyW(hkeyMinor, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &maxValueLen, NULL, NULL) != ERROR_SUCCESS)
 248                         break;
 249
 250                     for (indexValue = 0; !bFound; indexValue++)
 251                     {
 252                         DWORD dwType;
 253                         WCHAR wszValueName[14]; /* longest name we should encounter will be "Source Filter" */
 254                         LPWSTR wszPatternString = HeapAlloc(GetProcessHeap(), 0, maxValueLen);
 255                         DWORD dwValueNameLen = sizeof(wszValueName) / sizeof(wszValueName[0]); /* remember this is in chars */
 256                         DWORD dwDataLen = maxValueLen; /* remember this is in bytes */
 257                         static const WCHAR wszSourceFilter[] = {'S','o','u','r','c','e',' ','F','i','l','t','e','r',0};
 258                         LONG temp;
 259
 260                         if ((temp = RegEnumValueW(hkeyMinor, indexValue, wszValueName, &dwValueNameLen, NULL, &dwType, (LPBYTE)wszPatternString, &dwDataLen)) != ERROR_SUCCESS)
 261                         {
 262                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 263                             break;
 264                         }
 265
 266                         /* if it is not the source filter value */
 267                         if (strcmpW(wszValueName, wszSourceFilter))
 268                         {
 269                             if (process_pattern_string(wszPatternString, pReader) == S_OK)
 270                             {
 271                                 if (SUCCEEDED(CLSIDFromString(wszMajorKeyName, majorType)) &&
 272                                     SUCCEEDED(CLSIDFromString(wszMinorKeyName, minorType)))
 273                                     bFound = TRUE;
 274                             }
 275                         }
 276                         HeapFree(GetProcessHeap(), 0, wszPatternString);
 277                     }
 278                     CloseHandle(hkeyMinor);
 279                 }
 280             }
 281             CloseHandle(hkeyMajor);
 282         }
 283     }
 284     CloseHandle(hkeyMediaType);
 285
 286     if (SUCCEEDED(hr) && !bFound)
 287     {
 288         ERR("Media class not found\n");
 289         hr = E_FAIL;
 290     }
 291     else if (bFound)
 292         TRACE("Found file's class: major = %s, subtype = %s\n", qzdebugstr_guid(majorType), qzdebugstr_guid(minorType));
 293
 294     return hr;
 295 }
 296
 297 HRESULT AsyncReader_create(IUnknown * pUnkOuter, LPVOID * ppv)
 298 {
 299     AsyncReader *pAsyncRead;
 300
 301     if( pUnkOuter )
 302         return CLASS_E_NOAGGREGATION;
 303
 304     pAsyncRead = CoTaskMemAlloc(sizeof(AsyncReader));
 305
 306     if (!pAsyncRead)
 307         return E_OUTOFMEMORY;
 308
 309     pAsyncRead->lpVtbl = &AsyncReader_Vtbl;
 310     pAsyncRead->lpVtblFSF = &FileSource_Vtbl;
 311     pAsyncRead->refCount = 1;
 312     pAsyncRead->filterInfo.achName[0] = '\0';
 313     pAsyncRead->filterInfo.pGraph = NULL;
 314     pAsyncRead->pOutputPin = NULL;
 315
 316     InitializeCriticalSection(&pAsyncRead->csFilter);
 317     pAsyncRead->csFilter.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": AsyncReader.csFilter");
 318
 319     pAsyncRead->pszFileName = NULL;
 320     pAsyncRead->pmt = NULL;
 321
 322     *ppv = (LPVOID)pAsyncRead;
 323
 324     TRACE("-- created at %p\n", pAsyncRead);
 325
 326     return S_OK;
 327 }
 328
 329 /** IUnknown methods **/
 330
 331 static HRESULT WINAPI AsyncReader_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
 332 {
 333     AsyncReader *This = (AsyncReader *)iface;
 334
 335     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 336
 337     *ppv = NULL;
 338
 339     if (IsEqualIID(riid, &IID_IUnknown))
 340         *ppv = (LPVOID)This;
 341     else if (IsEqualIID(riid, &IID_IPersist))
 342         *ppv = (LPVOID)This;
 343     else if (IsEqualIID(riid, &IID_IMediaFilter))
 344         *ppv = (LPVOID)This;
 345     else if (IsEqualIID(riid, &IID_IBaseFilter))
 346         *ppv = (LPVOID)This;
 347     else if (IsEqualIID(riid, &IID_IFileSourceFilter))
 348         *ppv = (LPVOID)(&This->lpVtblFSF);
 349
 350     if (*ppv)
 351     {
 352         IUnknown_AddRef((IUnknown *)(*ppv));
 353         return S_OK;
 354     }
 355
 356     FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 357
 358     return E_NOINTERFACE;
 359 }
 360
 361 static ULONG WINAPI AsyncReader_AddRef(IBaseFilter * iface)
 362 {
 363     AsyncReader *This = (AsyncReader *)iface;
 364     ULONG refCount = InterlockedIncrement(&This->refCount);
 365
 366     TRACE("(%p)->() AddRef from %d\n", This, refCount - 1);
 367
 368     return refCount;
 369 }
 370
 371 static ULONG WINAPI AsyncReader_Release(IBaseFilter * iface)
 372 {
 373     AsyncReader *This = (AsyncReader *)iface;
 374     ULONG refCount = InterlockedDecrement(&This->refCount);
 375
 376     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 377
 378     if (!refCount)
 379     {
 380         if (This->pOutputPin)
 381         {
 382             IPin *pConnectedTo;
 383             if(SUCCEEDED(IPin_ConnectedTo(This->pOutputPin, &pConnectedTo)))
 384             {
 385                 IPin_Disconnect(pConnectedTo);
 386                 IPin_Release(pConnectedTo);
 387             }
 388             IPin_Disconnect(This->pOutputPin);
 389             IPin_Release(This->pOutputPin);
 390         }
 391         This->csFilter.DebugInfo->Spare[0] = 0;
 392         DeleteCriticalSection(&This->csFilter);
 393         This->lpVtbl = NULL;
 394         CoTaskMemFree(This);
 395         return 0;
 396     }
 397     else
 398         return refCount;
 399 }
 400
 401 /** IPersist methods **/
 402
 403 static HRESULT WINAPI AsyncReader_GetClassID(IBaseFilter * iface, CLSID * pClsid)
 404 {
 405     TRACE("(%p)\n", pClsid);
 406
 407     *pClsid = CLSID_AsyncReader;
 408
 409     return S_OK;
 410 }
 411
 412 /** IMediaFilter methods **/
 413
 414 static HRESULT WINAPI AsyncReader_Stop(IBaseFilter * iface)
 415 {
 416     AsyncReader *This = (AsyncReader *)iface;
 417
 418     TRACE("()\n");
 419
 420     This->state = State_Stopped;
 421
 422     return S_OK;
 423 }
 424
 425 static HRESULT WINAPI AsyncReader_Pause(IBaseFilter * iface)
 426 {
 427     AsyncReader *This = (AsyncReader *)iface;
 428
 429     TRACE("()\n");
 430
 431     This->state = State_Paused;
 432
 433     return S_OK;
 434 }
 435
 436 static HRESULT WINAPI AsyncReader_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
 437 {
 438     AsyncReader *This = (AsyncReader *)iface;
 439
 440     TRACE("(%x%08x)\n", (ULONG)(tStart >> 32), (ULONG)tStart);
 441
 442     This->state = State_Running;
 443
 444     return S_OK;
 445 }
 446
 447 static HRESULT WINAPI AsyncReader_GetState(IBaseFilter * iface, DWORD dwMilliSecsTimeout, FILTER_STATE *pState)
 448 {
 449     AsyncReader *This = (AsyncReader *)iface;
 450
 451     TRACE("(%u, %p)\n", dwMilliSecsTimeout, pState);
 452
 453     *pState = This->state;
 454
 455     return S_OK;
 456 }
 457
 458 static HRESULT WINAPI AsyncReader_SetSyncSource(IBaseFilter * iface, IReferenceClock *pClock)
 459 {
 460 /*    AsyncReader *This = (AsyncReader *)iface;*/
 461
 462     TRACE("(%p)\n", pClock);
 463
 464     return S_OK;
 465 }
 466
 467 static HRESULT WINAPI AsyncReader_GetSyncSource(IBaseFilter * iface, IReferenceClock **ppClock)
 468 {
 469 /*    AsyncReader *This = (AsyncReader *)iface;*/
 470
 471     TRACE("(%p)\n", ppClock);
 472
 473     return S_OK;
 474 }
 475
 476 /** IBaseFilter methods **/
 477
 478 static HRESULT WINAPI AsyncReader_EnumPins(IBaseFilter * iface, IEnumPins **ppEnum)
 479 {
 480     ENUMPINDETAILS epd;
 481     AsyncReader *This = (AsyncReader *)iface;
 482
 483     TRACE("(%p)\n", ppEnum);
 484
 485     epd.cPins = This->pOutputPin ? 1 : 0;
 486     epd.ppPins = &This->pOutputPin;
 487     return IEnumPinsImpl_Construct(&epd, ppEnum);
 488 }
 489
 490 static HRESULT WINAPI AsyncReader_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
 491 {
 492     FIXME("(%s, %p)\n", debugstr_w(Id), ppPin);
 493
 494     return E_NOTIMPL;
 495 }
 496
 497 static HRESULT WINAPI AsyncReader_QueryFilterInfo(IBaseFilter * iface, FILTER_INFO *pInfo)
 498 {
 499     AsyncReader *This = (AsyncReader *)iface;
 500
 501     TRACE("(%p)\n", pInfo);
 502
 503     strcpyW(pInfo->achName, This->filterInfo.achName);
 504     pInfo->pGraph = This->filterInfo.pGraph;
 505
 506     if (pInfo->pGraph)
 507         IFilterGraph_AddRef(pInfo->pGraph);
 508
 509     return S_OK;
 510 }
 511
 512 static HRESULT WINAPI AsyncReader_JoinFilterGraph(IBaseFilter * iface, IFilterGraph *pGraph, LPCWSTR pName)
 513 {
 514     AsyncReader *This = (AsyncReader *)iface;
 515
 516     TRACE("(%p, %s)\n", pGraph, debugstr_w(pName));
 517
 518     if (pName)
 519         strcpyW(This->filterInfo.achName, pName);
 520     else
 521         *This->filterInfo.achName = 0;
 522     This->filterInfo.pGraph = pGraph; /* NOTE: do NOT increase ref. count */
 523
 524     return S_OK;
 525 }
 526
 527 static HRESULT WINAPI AsyncReader_QueryVendorInfo(IBaseFilter * iface, LPWSTR *pVendorInfo)
 528 {
 529     FIXME("(%p)\n", pVendorInfo);
 530
 531     return E_NOTIMPL;
 532 }
 533
 534 static const IBaseFilterVtbl AsyncReader_Vtbl =
 535 {
 536     AsyncReader_QueryInterface,
 537     AsyncReader_AddRef,
 538     AsyncReader_Release,
 539     AsyncReader_GetClassID,
 540     AsyncReader_Stop,
 541     AsyncReader_Pause,
 542     AsyncReader_Run,
 543     AsyncReader_GetState,
 544     AsyncReader_SetSyncSource,
 545     AsyncReader_GetSyncSource,
 546     AsyncReader_EnumPins,
 547     AsyncReader_FindPin,
 548     AsyncReader_QueryFilterInfo,
 549     AsyncReader_JoinFilterGraph,
 550     AsyncReader_QueryVendorInfo
 551 };
 552
 553 static HRESULT WINAPI FileSource_QueryInterface(IFileSourceFilter * iface, REFIID riid, LPVOID * ppv)
 554 {
 555     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 556
 557     return IBaseFilter_QueryInterface((IFileSourceFilter*)&This->lpVtbl, riid, ppv);
 558 }
 559
 560 static ULONG WINAPI FileSource_AddRef(IFileSourceFilter * iface)
 561 {
 562     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 563
 564     return IBaseFilter_AddRef((IFileSourceFilter*)&This->lpVtbl);
 565 }
 566
 567 static ULONG WINAPI FileSource_Release(IFileSourceFilter * iface)
 568 {
 569     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 570
 571     return IBaseFilter_Release((IFileSourceFilter*)&This->lpVtbl);
 572 }
 573
 574 static HRESULT WINAPI FileSource_Load(IFileSourceFilter * iface, LPCOLESTR pszFileName, const AM_MEDIA_TYPE * pmt)
 575 {
 576     HRESULT hr;
 577     HANDLE hFile;
 578     IAsyncReader * pReader = NULL;
 579     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 580
 581     TRACE("(%s, %p)\n", debugstr_w(pszFileName), pmt);
 582
 583     /* open file */
 584     /* FIXME: check the sharing values that native uses */
 585     hFile = CreateFileW(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
 586
 587     if (hFile == INVALID_HANDLE_VALUE)
 588     {
 589         return HRESULT_FROM_WIN32(GetLastError());
 590     }
 591
 592     /* create pin */
 593     hr = FileAsyncReader_Construct(hFile, (IBaseFilter *)&This->lpVtbl, &This->csFilter, &This->pOutputPin);
 594
 595     if (SUCCEEDED(hr))
 596         hr = IPin_QueryInterface(This->pOutputPin, &IID_IAsyncReader, (LPVOID *)&pReader);
 597
 598     /* store file name & media type */
 599     if (SUCCEEDED(hr))
 600     {
 601         This->pszFileName = CoTaskMemAlloc((strlenW(pszFileName) + 1) * sizeof(WCHAR));
 602         strcpyW(This->pszFileName, pszFileName);
 603         This->pmt = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE));
 604         if (!pmt)
 605         {
 606             This->pmt->bFixedSizeSamples = TRUE;
 607             This->pmt->bTemporalCompression = FALSE;
 608             This->pmt->cbFormat = 0;
 609             This->pmt->pbFormat = NULL;
 610             This->pmt->pUnk = NULL;
 611             This->pmt->lSampleSize = 0;
 612             memcpy(&This->pmt->formattype, &FORMAT_None, sizeof(FORMAT_None));
 613             hr = GetClassMediaFile(pReader, pszFileName, &This->pmt->majortype, &This->pmt->subtype);
 614             if (FAILED(hr))
 615             {
 616                 CoTaskMemFree(This->pmt);
 617                 This->pmt = NULL;
 618             }
 619         }
 620         else
 621             CopyMediaType(This->pmt, pmt);
 622     }
 623
 624     if (pReader)
 625         IAsyncReader_Release(pReader);
 626
 627     if (FAILED(hr))
 628     {
 629         if (This->pOutputPin)
 630         {
 631             IPin_Release(This->pOutputPin);
 632             This->pOutputPin = NULL;
 633         }
 634
 635         CoTaskMemFree(This->pszFileName);
 636         This->pszFileName = NULL;
 637
 638         CloseHandle(hFile);
 639     }
 640
 641     /* FIXME: check return codes */
 642     return hr;
 643 }
 644
 645 static HRESULT WINAPI FileSource_GetCurFile(IFileSourceFilter * iface, LPOLESTR * ppszFileName, AM_MEDIA_TYPE * pmt)
 646 {
 647     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 648
 649     TRACE("(%p, %p)\n", ppszFileName, pmt);
 650
 651     if (!ppszFileName)
 652         return E_POINTER;
 653
 654     /* copy file name & media type if available, otherwise clear the outputs */
 655     if (This->pszFileName)
 656     {
 657         *ppszFileName = CoTaskMemAlloc((strlenW(This->pszFileName) + 1) * sizeof(WCHAR));
 658         strcpyW(*ppszFileName, This->pszFileName);
 659     }
 660     else
 661         *ppszFileName = NULL;
 662
 663     if (pmt)
 664     {
 665         if (This->pmt)
 666             CopyMediaType(pmt, This->pmt);
 667         else
 668             ZeroMemory(pmt, sizeof(*pmt));
 669     }
 670
 671     return S_OK;
 672 }
 673
 674 static const IFileSourceFilterVtbl FileSource_Vtbl =
 675 {
 676     FileSource_QueryInterface,
 677     FileSource_AddRef,
 678     FileSource_Release,
 679     FileSource_Load,
 680     FileSource_GetCurFile
 681 };
 682
 683
 684 /* the dwUserData passed back to user */
 685 typedef struct DATAREQUEST
 686 {
 687     IMediaSample * pSample; /* sample passed to us by user */
 688     DWORD_PTR dwUserData; /* user data passed to us */
 689     OVERLAPPED ovl; /* our overlapped structure */
 690
 691     struct DATAREQUEST * pNext; /* next data request in list */
 692 } DATAREQUEST;
 693
 694 static void queue(DATAREQUEST * pHead, DATAREQUEST * pItem)
 695 {
 696     DATAREQUEST * pCurrent;
 697     for (pCurrent = pHead; pCurrent->pNext; pCurrent = pCurrent->pNext)
 698         ;
 699     pCurrent->pNext = pItem;
 700 }
 701
 702 typedef struct FileAsyncReader
 703 {
 704     OutputPin pin;
 705     const struct IAsyncReaderVtbl * lpVtblAR;
 706
 707     HANDLE hFile;
 708     HANDLE hEvent;
 709     BOOL bFlushing;
 710     DATAREQUEST * pHead; /* head of data request list */
 711     CRITICAL_SECTION csList; /* critical section to protect operations on list */
 712 } FileAsyncReader;
 713
 714 static inline FileAsyncReader *impl_from_IAsyncReader( IAsyncReader *iface )
 715 {
 716     return (FileAsyncReader *)((char*)iface - FIELD_OFFSET(FileAsyncReader, lpVtblAR));
 717 }
 718
 719 static HRESULT AcceptProcAFR(LPVOID iface, const AM_MEDIA_TYPE *pmt)
 720 {
 721     AsyncReader *This = (AsyncReader *)iface;
 722
 723     FIXME("(%p, %p)\n", iface, pmt);
 724
 725     if (IsEqualGUID(&pmt->majortype, &This->pmt->majortype) &&
 726         IsEqualGUID(&pmt->subtype, &This->pmt->subtype) &&
 727         IsEqualGUID(&pmt->formattype, &FORMAT_None))
 728         return S_OK;
 729
 730     return S_FALSE;
 731 }
 732
 733 /* overriden pin functions */
 734
 735 static HRESULT WINAPI FileAsyncReaderPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 736 {
 737     FileAsyncReader *This = (FileAsyncReader *)iface;
 738     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 739
 740     *ppv = NULL;
 741
 742     if (IsEqualIID(riid, &IID_IUnknown))
 743         *ppv = (LPVOID)This;
 744     else if (IsEqualIID(riid, &IID_IPin))
 745         *ppv = (LPVOID)This;
 746     else if (IsEqualIID(riid, &IID_IAsyncReader))
 747         *ppv = (LPVOID)&This->lpVtblAR;
 748
 749     if (*ppv)
 750     {
 751         IUnknown_AddRef((IUnknown *)(*ppv));
 752         return S_OK;
 753     }
 754
 755     FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 756
 757     return E_NOINTERFACE;
 758 }
 759
 760 static ULONG WINAPI FileAsyncReaderPin_Release(IPin * iface)
 761 {
 762     FileAsyncReader *This = (FileAsyncReader *)iface;
 763     ULONG refCount = InterlockedDecrement(&This->pin.pin.refCount);
 764
 765     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 766
 767     if (!refCount)
 768     {
 769         DATAREQUEST * pCurrent;
 770         DATAREQUEST * pNext;
 771         for (pCurrent = This->pHead; pCurrent; pCurrent = pNext)
 772         {
 773             pNext = pCurrent->pNext;
 774             CoTaskMemFree(pCurrent);
 775         }
 776         CloseHandle(This->hFile);
 777         CloseHandle(This->hEvent);
 778         This->csList.DebugInfo->Spare[0] = 0;
 779         DeleteCriticalSection(&This->csList);
 780         CoTaskMemFree(This);
 781         return 0;
 782     }
 783     return refCount;
 784 }
 785
 786 static HRESULT WINAPI FileAsyncReaderPin_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum)
 787 {
 788     ENUMMEDIADETAILS emd;
 789     FileAsyncReader *This = (FileAsyncReader *)iface;
 790
 791     TRACE("(%p)\n", ppEnum);
 792
 793     emd.cMediaTypes = 1;
 794     emd.pMediaTypes = ((AsyncReader *)This->pin.pin.pinInfo.pFilter)->pmt;
 795
 796     return IEnumMediaTypesImpl_Construct(&emd, ppEnum);
 797 }
 798
 799 static const IPinVtbl FileAsyncReaderPin_Vtbl =
 800 {
 801     FileAsyncReaderPin_QueryInterface,
 802     IPinImpl_AddRef,
 803     FileAsyncReaderPin_Release,
 804     OutputPin_Connect,
 805     OutputPin_ReceiveConnection,
 806     IPinImpl_Disconnect,
 807     IPinImpl_ConnectedTo,
 808     IPinImpl_ConnectionMediaType,
 809     IPinImpl_QueryPinInfo,
 810     IPinImpl_QueryDirection,
 811     IPinImpl_QueryId,
 812     IPinImpl_QueryAccept,
 813     FileAsyncReaderPin_EnumMediaTypes,
 814     IPinImpl_QueryInternalConnections,
 815     OutputPin_EndOfStream,
 816     OutputPin_BeginFlush,
 817     OutputPin_EndFlush,
 818     OutputPin_NewSegment
 819 };
 820
 821 /* Function called as a helper to IPin_Connect */
 822 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 823 /* this differs from standard OutputPin_ConnectSpecific only in that it
 824  * doesn't need the IMemInputPin interface on the receiving pin */
 825 static HRESULT FileAsyncReaderPin_ConnectSpecific(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 826 {
 827     OutputPin *This = (OutputPin *)iface;
 828     HRESULT hr;
 829
 830     TRACE("(%p, %p)\n", pReceivePin, pmt);
 831     dump_AM_MEDIA_TYPE(pmt);
 832
 833     /* FIXME: call queryacceptproc */
 834
 835     This->pin.pConnectedTo = pReceivePin;
 836     IPin_AddRef(pReceivePin);
 837     CopyMediaType(&This->pin.mtCurrent, pmt);
 838
 839     hr = IPin_ReceiveConnection(pReceivePin, iface, pmt);
 840
 841     if (FAILED(hr))
 842     {
 843         IPin_Release(This->pin.pConnectedTo);
 844         This->pin.pConnectedTo = NULL;
 845         FreeMediaType(&This->pin.mtCurrent);
 846     }
 847
 848     TRACE(" -- %x\n", hr);
 849     return hr;
 850 }
 851
 852 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 853 {
 854     FileAsyncReader * pPinImpl;
 855     PIN_INFO piOutput;
 856
 857     *ppPin = NULL;
 858
 859     pPinImpl = CoTaskMemAlloc(sizeof(*pPinImpl));
 860
 861     if (!pPinImpl)
 862         return E_OUTOFMEMORY;
 863
 864     piOutput.dir = PINDIR_OUTPUT;
 865     piOutput.pFilter = pBaseFilter;
 866     strcpyW(piOutput.achName, wszOutputPinName);
 867
 868     if (SUCCEEDED(OutputPin_Init(&piOutput, NULL, pBaseFilter, AcceptProcAFR, pCritSec, &pPinImpl->pin)))
 869     {
 870         pPinImpl->pin.pin.lpVtbl = &FileAsyncReaderPin_Vtbl;
 871         pPinImpl->lpVtblAR = &FileAsyncReader_Vtbl;
 872         pPinImpl->hFile = hFile;
 873         pPinImpl->hEvent = CreateEventW(NULL, 0, 0, NULL);
 874         pPinImpl->bFlushing = FALSE;
 875         pPinImpl->pHead = NULL;
 876         pPinImpl->pin.pConnectSpecific = FileAsyncReaderPin_ConnectSpecific;
 877         InitializeCriticalSection(&pPinImpl->csList);
 878         pPinImpl->csList.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FileAsyncReader.csList");
 879
 880         *ppPin = (IPin *)(&pPinImpl->pin.pin.lpVtbl);
 881         return S_OK;
 882     }
 883     return E_FAIL;
 884 }
 885
 886 /* IAsyncReader */
 887
 888 static HRESULT WINAPI FileAsyncReader_QueryInterface(IAsyncReader * iface, REFIID riid, LPVOID * ppv)
 889 {
 890     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 891
 892     return IPin_QueryInterface((IPin *)This, riid, ppv);
 893 }
 894
 895 static ULONG WINAPI FileAsyncReader_AddRef(IAsyncReader * iface)
 896 {
 897     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 898
 899     return IPin_AddRef((IPin *)This);
 900 }
 901
 902 static ULONG WINAPI FileAsyncReader_Release(IAsyncReader * iface)
 903 {
 904     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 905
 906     return IPin_Release((IPin *)This);
 907 }
 908
 909 #define DEF_ALIGNMENT 1
 910
 911 static HRESULT WINAPI FileAsyncReader_RequestAllocator(IAsyncReader * iface, IMemAllocator * pPreferred, ALLOCATOR_PROPERTIES * pProps, IMemAllocator ** ppActual)
 912 {
 913     HRESULT hr = S_OK;
 914
 915     TRACE("(%p, %p, %p)\n", pPreferred, pProps, ppActual);
 916
 917     if (!pProps->cbAlign || (pProps->cbAlign % DEF_ALIGNMENT) != 0)
 918         pProps->cbAlign = DEF_ALIGNMENT;
 919
 920     if (pPreferred)
 921     {
 922         ALLOCATOR_PROPERTIES PropsActual;
 923         hr = IMemAllocator_SetProperties(pPreferred, pProps, &PropsActual);
 924         /* FIXME: check we are still aligned */
 925         if (SUCCEEDED(hr))
 926         {
 927             IMemAllocator_AddRef(pPreferred);
 928             *ppActual = pPreferred;
 929             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 930             return S_OK;
 931         }
 932     }
 933
 934     pPreferred = NULL;
 935
 936     hr = CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC, &IID_IMemAllocator, (LPVOID *)&pPreferred);
 937
 938     if (SUCCEEDED(hr))
 939     {
 940         ALLOCATOR_PROPERTIES PropsActual;
 941         hr = IMemAllocator_SetProperties(pPreferred, pProps, &PropsActual);
 942         /* FIXME: check we are still aligned */
 943         if (SUCCEEDED(hr))
 944         {
 945             *ppActual = pPreferred;
 946             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 947             return S_OK;
 948         }
 949     }
 950
 951     if (FAILED(hr))
 952     {
 953         *ppActual = NULL;
 954         if (pPreferred)
 955             IMemAllocator_Release(pPreferred);
 956     }
 957
 958     TRACE("-- %x\n", hr);
 959     return hr;
 960 }
 961
 962 /* we could improve the Request/WaitForNext mechanism by allowing out of order samples.
 963  * however, this would be quite complicated to do and may be a bit error prone */
 964 static HRESULT WINAPI FileAsyncReader_Request(IAsyncReader * iface, IMediaSample * pSample, DWORD_PTR dwUser)
 965 {
 966     REFERENCE_TIME Start;
 967     REFERENCE_TIME Stop;
 968     DATAREQUEST * pDataRq;
 969     BYTE * pBuffer;
 970     HRESULT hr = S_OK;
 971     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 972
 973     TRACE("(%p, %lx)\n", pSample, dwUser);
 974
 975     /* check flushing state */
 976     if (This->bFlushing)
 977         return VFW_E_WRONG_STATE;
 978
 979     if (!(pDataRq = CoTaskMemAlloc(sizeof(*pDataRq))))
 980         hr = E_OUTOFMEMORY;
 981
 982     /* get start and stop positions in bytes */
 983     if (SUCCEEDED(hr))
 984         hr = IMediaSample_GetTime(pSample, &Start, &Stop);
 985
 986     if (SUCCEEDED(hr))
 987         hr = IMediaSample_GetPointer(pSample, &pBuffer);
 988
 989     if (SUCCEEDED(hr))
 990     {
 991         DWORD dwLength = (DWORD) BYTES_FROM_MEDIATIME(Stop - Start);
 992
 993         pDataRq->ovl.u.s.Offset = (DWORD) BYTES_FROM_MEDIATIME(Start);
 994         pDataRq->ovl.u.s.OffsetHigh = (DWORD)(BYTES_FROM_MEDIATIME(Start) >> (sizeof(DWORD) * 8));
 995         pDataRq->ovl.hEvent = This->hEvent;
 996         pDataRq->dwUserData = dwUser;
 997         pDataRq->pNext = NULL;
 998         /* we violate traditional COM rules here by maintaining
 999          * a reference to the sample, but not calling AddRef, but
1000          * that's what MSDN says to do */
1001         pDataRq->pSample = pSample;
1002
1003         EnterCriticalSection(&This->csList);
1004         {
1005             if (This->pHead)
1006                 /* adds data request to end of list */
1007                 queue(This->pHead, pDataRq);
1008             else
1009                 This->pHead = pDataRq;
1010         }
1011         LeaveCriticalSection(&This->csList);
1012
1013         /* this is definitely not how it is implemented on Win9x
1014          * as they do not support async reads on files, but it is
1015          * sooo much easier to use this than messing around with threads!
1016          */
1017         if (!ReadFile(This->hFile, pBuffer, dwLength, NULL, &pDataRq->ovl))
1018             hr = HRESULT_FROM_WIN32(GetLastError());
1019
1020         /* ERROR_IO_PENDING is not actually an error since this is what we want! */
1021         if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1022             hr = S_OK;
1023     }
1024
1025     if (FAILED(hr) && pDataRq)
1026     {
1027         EnterCriticalSection(&This->csList);
1028         {
1029             DATAREQUEST * pCurrent;
1030             for (pCurrent = This->pHead; pCurrent && pCurrent->pNext; pCurrent = pCurrent->pNext)
1031                 if (pCurrent->pNext == pDataRq)
1032                 {
1033                     pCurrent->pNext = pDataRq->pNext;
1034                     break;
1035                 }
1036         }
1037         LeaveCriticalSection(&This->csList);
1038         CoTaskMemFree(pDataRq);
1039     }
1040
1041     TRACE("-- %x\n", hr);
1042     return hr;
1043 }
1044
1045 static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dwTimeout, IMediaSample ** ppSample, DWORD_PTR * pdwUser)
1046 {
1047     HRESULT hr = S_OK;
1048     DWORD dwBytes = 0;
1049     DATAREQUEST * pDataRq = NULL;
1050     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1051
1052     TRACE("(%u, %p, %p)\n", dwTimeout, ppSample, pdwUser);
1053
1054     /* FIXME: we could do with improving this by waiting for an array of event handles
1055      * and then determining which one finished and removing that from the list, otherwise
1056      * we will end up waiting for longer than we should do, if a later request finishes
1057      * before an earlier one */
1058
1059     *ppSample = NULL;
1060     *pdwUser = 0;
1061
1062     /* we return immediately if flushing */
1063     if (This->bFlushing)
1064         hr = VFW_E_WRONG_STATE;
1065
1066     if (SUCCEEDED(hr))
1067     {
1068         /* wait for the read to finish or timeout */
1069         if (WaitForSingleObject(This->hEvent, dwTimeout) == WAIT_TIMEOUT)
1070             hr = VFW_E_TIMEOUT;
1071     }
1072     if (SUCCEEDED(hr))
1073     {
1074         EnterCriticalSection(&This->csList);
1075         {
1076             pDataRq = This->pHead;
1077             if (pDataRq == NULL)
1078                 hr = E_FAIL;
1079             else
1080                 This->pHead = pDataRq->pNext;
1081         }
1082         LeaveCriticalSection(&This->csList);
1083     }
1084
1085     if (SUCCEEDED(hr))
1086     {
1087         /* get any errors */
1088         if (!GetOverlappedResult(This->hFile, &pDataRq->ovl, &dwBytes, FALSE))
1089             hr = HRESULT_FROM_WIN32(GetLastError());
1090     }
1091
1092     if (SUCCEEDED(hr))
1093     {
1094         IMediaSample_SetActualDataLength(pDataRq->pSample, dwBytes);
1095         *ppSample = pDataRq->pSample;
1096         *pdwUser = pDataRq->dwUserData;
1097     }
1098
1099     /* no need to close event handle since we will close it when the pin is destroyed */
1100     CoTaskMemFree(pDataRq);
1101
1102     TRACE("-- %x\n", hr);
1103     return hr;
1104 }
1105
1106 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer);
1107
1108 static HRESULT WINAPI FileAsyncReader_SyncReadAligned(IAsyncReader * iface, IMediaSample * pSample)
1109 {
1110     BYTE * pBuffer;
1111     REFERENCE_TIME tStart;
1112     REFERENCE_TIME tStop;
1113     HRESULT hr;
1114
1115     TRACE("(%p)\n", pSample);
1116
1117     hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
1118
1119     if (SUCCEEDED(hr))
1120         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1121
1122     if (SUCCEEDED(hr))
1123         hr = FileAsyncReader_SyncRead(iface,
1124             BYTES_FROM_MEDIATIME(tStart),
1125             (LONG) BYTES_FROM_MEDIATIME(tStop - tStart),
1126             pBuffer);
1127
1128     TRACE("-- %x\n", hr);
1129     return hr;
1130 }
1131
1132 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer)
1133 {
1134     OVERLAPPED ovl;
1135     HRESULT hr = S_OK;
1136     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1137
1138     TRACE("(%x%08x, %d, %p)\n", (ULONG)(llPosition >> 32), (ULONG)llPosition, lLength, pBuffer);
1139
1140     ZeroMemory(&ovl, sizeof(ovl));
1141
1142     ovl.hEvent = CreateEventW(NULL, 0, 0, NULL);
1143     /* NOTE: llPosition is the actual byte position to start reading from */
1144     ovl.u.s.Offset = (DWORD) llPosition;
1145     ovl.u.s.OffsetHigh = (DWORD) (llPosition >> (sizeof(DWORD) * 8));
1146
1147     if (!ReadFile(This->hFile, pBuffer, lLength, NULL, &ovl))
1148         hr = HRESULT_FROM_WIN32(GetLastError());
1149
1150     if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1151         hr = S_OK;
1152
1153     if (SUCCEEDED(hr))
1154     {
1155         DWORD dwBytesRead;
1156
1157         if (!GetOverlappedResult(This->hFile, &ovl, &dwBytesRead, TRUE))
1158             hr = HRESULT_FROM_WIN32(GetLastError());
1159     }
1160
1161     CloseHandle(ovl.hEvent);
1162
1163     TRACE("-- %x\n", hr);
1164     return hr;
1165 }
1166
1167 static HRESULT WINAPI FileAsyncReader_Length(IAsyncReader * iface, LONGLONG * pTotal, LONGLONG * pAvailable)
1168 {
1169     DWORD dwSizeLow;
1170     DWORD dwSizeHigh;
1171     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1172
1173     TRACE("(%p, %p)\n", pTotal, pAvailable);
1174
1175     if (((dwSizeLow = GetFileSize(This->hFile, &dwSizeHigh)) == -1) &&
1176         (GetLastError() != NO_ERROR))
1177         return HRESULT_FROM_WIN32(GetLastError());
1178
1179     *pTotal = (LONGLONG)dwSizeLow | (LONGLONG)dwSizeHigh << (sizeof(DWORD) * 8);
1180
1181     *pAvailable = *pTotal;
1182
1183     return S_OK;
1184 }
1185
1186 static HRESULT WINAPI FileAsyncReader_BeginFlush(IAsyncReader * iface)
1187 {
1188     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1189
1190     TRACE("()\n");
1191
1192     This->bFlushing = TRUE;
1193     CancelIo(This->hFile);
1194     SetEvent(This->hEvent);
1195
1196     /* FIXME: free list */
1197
1198     return S_OK;
1199 }
1200
1201 static HRESULT WINAPI FileAsyncReader_EndFlush(IAsyncReader * iface)
1202 {
1203     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1204
1205     TRACE("()\n");
1206
1207     This->bFlushing = FALSE;
1208
1209     return S_OK;
1210 }
1211
1212 static const IAsyncReaderVtbl FileAsyncReader_Vtbl =
1213 {
1214     FileAsyncReader_QueryInterface,
1215     FileAsyncReader_AddRef,
1216     FileAsyncReader_Release,
1217     FileAsyncReader_RequestAllocator,
1218     FileAsyncReader_Request,
1219     FileAsyncReader_WaitForNext,
1220     FileAsyncReader_SyncReadAligned,
1221     FileAsyncReader_SyncRead,
1222     FileAsyncReader_Length,
1223     FileAsyncReader_BeginFlush,
1224     FileAsyncReader_EndFlush,
1225 };