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 "shlwapi.h"
  34 #include <assert.h>
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  37
  38 static const WCHAR wszOutputPinName[] = { 'O','u','t','p','u','t',0 };
  39
  40 typedef struct AsyncReader
  41 {
  42     const IBaseFilterVtbl * lpVtbl;
  43     const IFileSourceFilterVtbl * lpVtblFSF;
  44
  45     LONG refCount;
  46     FILTER_INFO filterInfo;
  47     FILTER_STATE state;
  48     CRITICAL_SECTION csFilter;
  49
  50     IPin * pOutputPin;
  51     LPOLESTR pszFileName;
  52     AM_MEDIA_TYPE * pmt;
  53 } AsyncReader;
  54
  55 static const IBaseFilterVtbl AsyncReader_Vtbl;
  56 static const IFileSourceFilterVtbl FileSource_Vtbl;
  57 static const IAsyncReaderVtbl FileAsyncReader_Vtbl;
  58
  59 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
  60
  61 static inline AsyncReader *impl_from_IFileSourceFilter( IFileSourceFilter *iface )
  62 {
  63     return (AsyncReader *)((char*)iface - FIELD_OFFSET(AsyncReader, lpVtblFSF));
  64 }
  65
  66 static WCHAR const mediatype_name[11] = {
  67     'M', 'e', 'd', 'i', 'a', ' ', 'T', 'y', 'p', 'e', 0 };
  68 static WCHAR const subtype_name[8] = {
  69     'S', 'u', 'b', 't', 'y', 'p', 'e', 0 };
  70
  71 static HRESULT process_extensions(HKEY hkeyExtensions, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType)
  72 {
  73     WCHAR *extension;
  74     LONG l;
  75     HKEY hsub;
  76     WCHAR keying[39];
  77     DWORD size;
  78
  79     if (!pszFileName)
  80         return E_POINTER;
  81
  82     /* Get the part of the name that matters */
  83     extension = PathFindExtensionW(pszFileName);
  84     if (*extension != '.')
  85         return E_FAIL;
  86
  87     l = RegOpenKeyExW(hkeyExtensions, extension, 0, KEY_READ, &hsub);
  88     if (l)
  89         return E_FAIL;
  90
  91     size = sizeof(keying);
  92     l = RegQueryValueExW(hsub, mediatype_name, NULL, NULL, (LPBYTE)keying, &size);
  93     if (!l)
  94         CLSIDFromString(keying, majorType);
  95
  96     size = sizeof(keying);
  97     if (!l)
  98         l = RegQueryValueExW(hsub, subtype_name, NULL, NULL, (LPBYTE)keying, &size);
  99     if (!l)
 100         CLSIDFromString(keying, minorType);
 101
 102     RegCloseKey(hsub);
 103
 104     if (!l)
 105         return S_OK;
 106     return E_FAIL;
 107 }
 108
 109 static unsigned char byte_from_hex_char(WCHAR wHex)
 110 {
 111     switch (tolowerW(wHex))
 112     {
 113     case '0':
 114     case '1':
 115     case '2':
 116     case '3':
 117     case '4':
 118     case '5':
 119     case '6':
 120     case '7':
 121     case '8':
 122     case '9':
 123         return (wHex - '0') & 0xf;
 124     case 'a':
 125     case 'b':
 126     case 'c':
 127     case 'd':
 128     case 'e':
 129     case 'f':
 130         return (wHex - 'a' + 10) & 0xf;
 131     default:
 132         return 0;
 133     }
 134 }
 135
 136 static HRESULT process_pattern_string(LPCWSTR wszPatternString, IAsyncReader * pReader)
 137 {
 138     ULONG ulOffset;
 139     ULONG ulBytes;
 140     BYTE * pbMask;
 141     BYTE * pbValue;
 142     BYTE * pbFile;
 143     HRESULT hr = S_OK;
 144     ULONG strpos;
 145
 146     TRACE("\t\tPattern string: %s\n", debugstr_w(wszPatternString));
 147
 148     /* format: "offset, bytestocompare, mask, value" */
 149
 150     ulOffset = strtolW(wszPatternString, NULL, 10);
 151
 152     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 153         return E_INVALIDARG;
 154
 155     wszPatternString++; /* skip ',' */
 156
 157     ulBytes = strtolW(wszPatternString, NULL, 10);
 158
 159     pbMask = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 160     pbValue = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, ulBytes);
 161     pbFile = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 162
 163     /* default mask is match everything */
 164     memset(pbMask, 0xFF, ulBytes);
 165
 166     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 167         hr = E_INVALIDARG;
 168
 169     wszPatternString++; /* skip ',' */
 170
 171     if (hr == S_OK)
 172     {
 173         for ( ; !isxdigitW(*wszPatternString) && (*wszPatternString != ','); wszPatternString++)
 174             ;
 175
 176         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 177         {
 178             if ((strpos % 2) == 1) /* odd numbered position */
 179                 pbMask[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 180             else
 181                 pbMask[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 182         }
 183
 184         if (!(wszPatternString = strchrW(wszPatternString, ',')))
 185             hr = E_INVALIDARG;
 186
 187         wszPatternString++; /* skip ',' */
 188     }
 189
 190     if (hr == S_OK)
 191     {
 192         for ( ; !isxdigitW(*wszPatternString) && (*wszPatternString != ','); wszPatternString++)
 193             ;
 194
 195         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 196         {
 197             if ((strpos % 2) == 1) /* odd numbered position */
 198                 pbValue[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 199             else
 200                 pbValue[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 201         }
 202     }
 203
 204     if (hr == S_OK)
 205         hr = IAsyncReader_SyncRead(pReader, ulOffset, ulBytes, pbFile);
 206
 207     if (hr == S_OK)
 208     {
 209         ULONG i;
 210         for (i = 0; i < ulBytes; i++)
 211             if ((pbFile[i] & pbMask[i]) != pbValue[i])
 212             {
 213                 hr = S_FALSE;
 214                 break;
 215             }
 216     }
 217
 218     HeapFree(GetProcessHeap(), 0, pbMask);
 219     HeapFree(GetProcessHeap(), 0, pbValue);
 220     HeapFree(GetProcessHeap(), 0, pbFile);
 221
 222     /* if we encountered no errors with this string, and there is a following tuple, then we
 223      * have to match that as well to succeed */
 224     if ((hr == S_OK) && (wszPatternString = strchrW(wszPatternString, ',')))
 225         return process_pattern_string(wszPatternString + 1, pReader);
 226     else
 227         return hr;
 228 }
 229
 230 static HRESULT GetClassMediaFile(IAsyncReader * pReader, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType)
 231 {
 232     HKEY hkeyMediaType = NULL;
 233     LONG lRet;
 234     HRESULT hr = S_OK;
 235     BOOL bFound = FALSE;
 236     static const WCHAR wszMediaType[] = {'M','e','d','i','a',' ','T','y','p','e',0};
 237
 238     TRACE("(%p, %s, %p, %p)\n", pReader, debugstr_w(pszFileName), majorType, minorType);
 239
 240     CopyMemory(majorType, &GUID_NULL, sizeof(*majorType));
 241     CopyMemory(minorType, &GUID_NULL, sizeof(*minorType));
 242
 243     lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszMediaType, 0, KEY_READ, &hkeyMediaType);
 244     hr = HRESULT_FROM_WIN32(lRet);
 245
 246     if (SUCCEEDED(hr))
 247     {
 248         DWORD indexMajor;
 249
 250         for (indexMajor = 0; !bFound; indexMajor++)
 251         {
 252             HKEY hkeyMajor;
 253             WCHAR wszMajorKeyName[CHARS_IN_GUID];
 254             DWORD dwKeyNameLength = sizeof(wszMajorKeyName) / sizeof(wszMajorKeyName[0]);
 255             static const WCHAR wszExtensions[] = {'E','x','t','e','n','s','i','o','n','s',0};
 256
 257             if (RegEnumKeyExW(hkeyMediaType, indexMajor, wszMajorKeyName, &dwKeyNameLength, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 258                 break;
 259             if (RegOpenKeyExW(hkeyMediaType, wszMajorKeyName, 0, KEY_READ, &hkeyMajor) != ERROR_SUCCESS)
 260                 break;
 261             TRACE("%s\n", debugstr_w(wszMajorKeyName));
 262             if (!strcmpW(wszExtensions, wszMajorKeyName))
 263             {
 264                 if (process_extensions(hkeyMajor, pszFileName, majorType, minorType) == S_OK)
 265                     bFound = TRUE;
 266             }
 267             else
 268             {
 269                 DWORD indexMinor;
 270
 271                 for (indexMinor = 0; !bFound; indexMinor++)
 272                 {
 273                     HKEY hkeyMinor;
 274                     WCHAR wszMinorKeyName[CHARS_IN_GUID];
 275                     DWORD dwMinorKeyNameLen = sizeof(wszMinorKeyName) / sizeof(wszMinorKeyName[0]);
 276                     DWORD maxValueLen;
 277                     DWORD indexValue;
 278
 279                     if (RegEnumKeyExW(hkeyMajor, indexMinor, wszMinorKeyName, &dwMinorKeyNameLen, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 280                         break;
 281
 282                     if (RegOpenKeyExW(hkeyMajor, wszMinorKeyName, 0, KEY_READ, &hkeyMinor) != ERROR_SUCCESS)
 283                         break;
 284
 285                     TRACE("\t%s\n", debugstr_w(wszMinorKeyName));
 286
 287                     if (RegQueryInfoKeyW(hkeyMinor, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &maxValueLen, NULL, NULL) != ERROR_SUCCESS)
 288                         break;
 289
 290                     for (indexValue = 0; !bFound; indexValue++)
 291                     {
 292                         DWORD dwType;
 293                         WCHAR wszValueName[14]; /* longest name we should encounter will be "Source Filter" */
 294                         LPWSTR wszPatternString = HeapAlloc(GetProcessHeap(), 0, maxValueLen);
 295                         DWORD dwValueNameLen = sizeof(wszValueName) / sizeof(wszValueName[0]); /* remember this is in chars */
 296                         DWORD dwDataLen = maxValueLen; /* remember this is in bytes */
 297                         static const WCHAR wszSourceFilter[] = {'S','o','u','r','c','e',' ','F','i','l','t','e','r',0};
 298                         LONG temp;
 299
 300                         if ((temp = RegEnumValueW(hkeyMinor, indexValue, wszValueName, &dwValueNameLen, NULL, &dwType, (LPBYTE)wszPatternString, &dwDataLen)) != ERROR_SUCCESS)
 301                         {
 302                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 303                             break;
 304                         }
 305
 306                         /* if it is not the source filter value */
 307                         if (strcmpW(wszValueName, wszSourceFilter))
 308                         {
 309                             if (process_pattern_string(wszPatternString, pReader) == S_OK)
 310                             {
 311                                 if (SUCCEEDED(CLSIDFromString(wszMajorKeyName, majorType)) &&
 312                                     SUCCEEDED(CLSIDFromString(wszMinorKeyName, minorType)))
 313                                     bFound = TRUE;
 314                             }
 315                         }
 316                         HeapFree(GetProcessHeap(), 0, wszPatternString);
 317                     }
 318                     CloseHandle(hkeyMinor);
 319                 }
 320             }
 321             CloseHandle(hkeyMajor);
 322         }
 323     }
 324     CloseHandle(hkeyMediaType);
 325
 326     if (SUCCEEDED(hr) && !bFound)
 327     {
 328         ERR("Media class not found\n");
 329         hr = E_FAIL;
 330     }
 331     else if (bFound)
 332         TRACE("Found file's class: major = %s, subtype = %s\n", qzdebugstr_guid(majorType), qzdebugstr_guid(minorType));
 333
 334     return hr;
 335 }
 336
 337 HRESULT AsyncReader_create(IUnknown * pUnkOuter, LPVOID * ppv)
 338 {
 339     AsyncReader *pAsyncRead;
 340
 341     if( pUnkOuter )
 342         return CLASS_E_NOAGGREGATION;
 343
 344     pAsyncRead = CoTaskMemAlloc(sizeof(AsyncReader));
 345
 346     if (!pAsyncRead)
 347         return E_OUTOFMEMORY;
 348
 349     pAsyncRead->lpVtbl = &AsyncReader_Vtbl;
 350     pAsyncRead->lpVtblFSF = &FileSource_Vtbl;
 351     pAsyncRead->refCount = 1;
 352     pAsyncRead->filterInfo.achName[0] = '\0';
 353     pAsyncRead->filterInfo.pGraph = NULL;
 354     pAsyncRead->pOutputPin = NULL;
 355
 356     InitializeCriticalSection(&pAsyncRead->csFilter);
 357     pAsyncRead->csFilter.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": AsyncReader.csFilter");
 358
 359     pAsyncRead->pszFileName = NULL;
 360     pAsyncRead->pmt = NULL;
 361
 362     *ppv = (LPVOID)pAsyncRead;
 363
 364     TRACE("-- created at %p\n", pAsyncRead);
 365
 366     return S_OK;
 367 }
 368
 369 /** IUnknown methods **/
 370
 371 static HRESULT WINAPI AsyncReader_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
 372 {
 373     AsyncReader *This = (AsyncReader *)iface;
 374
 375     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 376
 377     *ppv = NULL;
 378
 379     if (IsEqualIID(riid, &IID_IUnknown))
 380         *ppv = (LPVOID)This;
 381     else if (IsEqualIID(riid, &IID_IPersist))
 382         *ppv = (LPVOID)This;
 383     else if (IsEqualIID(riid, &IID_IMediaFilter))
 384         *ppv = (LPVOID)This;
 385     else if (IsEqualIID(riid, &IID_IBaseFilter))
 386         *ppv = (LPVOID)This;
 387     else if (IsEqualIID(riid, &IID_IFileSourceFilter))
 388         *ppv = (LPVOID)(&This->lpVtblFSF);
 389
 390     if (*ppv)
 391     {
 392         IUnknown_AddRef((IUnknown *)(*ppv));
 393         return S_OK;
 394     }
 395
 396     FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 397
 398     return E_NOINTERFACE;
 399 }
 400
 401 static ULONG WINAPI AsyncReader_AddRef(IBaseFilter * iface)
 402 {
 403     AsyncReader *This = (AsyncReader *)iface;
 404     ULONG refCount = InterlockedIncrement(&This->refCount);
 405
 406     TRACE("(%p)->() AddRef from %d\n", This, refCount - 1);
 407
 408     return refCount;
 409 }
 410
 411 static ULONG WINAPI AsyncReader_Release(IBaseFilter * iface)
 412 {
 413     AsyncReader *This = (AsyncReader *)iface;
 414     ULONG refCount = InterlockedDecrement(&This->refCount);
 415
 416     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 417
 418     if (!refCount)
 419     {
 420         if (This->pOutputPin)
 421         {
 422             IPin *pConnectedTo;
 423             if(SUCCEEDED(IPin_ConnectedTo(This->pOutputPin, &pConnectedTo)))
 424             {
 425                 IPin_Disconnect(pConnectedTo);
 426                 IPin_Release(pConnectedTo);
 427             }
 428             IPin_Disconnect(This->pOutputPin);
 429             IPin_Release(This->pOutputPin);
 430         }
 431         This->csFilter.DebugInfo->Spare[0] = 0;
 432         DeleteCriticalSection(&This->csFilter);
 433         This->lpVtbl = NULL;
 434         CoTaskMemFree(This);
 435         return 0;
 436     }
 437     else
 438         return refCount;
 439 }
 440
 441 /** IPersist methods **/
 442
 443 static HRESULT WINAPI AsyncReader_GetClassID(IBaseFilter * iface, CLSID * pClsid)
 444 {
 445     TRACE("(%p)\n", pClsid);
 446
 447     *pClsid = CLSID_AsyncReader;
 448
 449     return S_OK;
 450 }
 451
 452 /** IMediaFilter methods **/
 453
 454 static HRESULT WINAPI AsyncReader_Stop(IBaseFilter * iface)
 455 {
 456     AsyncReader *This = (AsyncReader *)iface;
 457
 458     TRACE("()\n");
 459
 460     This->state = State_Stopped;
 461
 462     return S_OK;
 463 }
 464
 465 static HRESULT WINAPI AsyncReader_Pause(IBaseFilter * iface)
 466 {
 467     AsyncReader *This = (AsyncReader *)iface;
 468
 469     TRACE("()\n");
 470
 471     This->state = State_Paused;
 472
 473     return S_OK;
 474 }
 475
 476 static HRESULT WINAPI AsyncReader_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
 477 {
 478     AsyncReader *This = (AsyncReader *)iface;
 479
 480     TRACE("(%x%08x)\n", (ULONG)(tStart >> 32), (ULONG)tStart);
 481
 482     This->state = State_Running;
 483
 484     return S_OK;
 485 }
 486
 487 static HRESULT WINAPI AsyncReader_GetState(IBaseFilter * iface, DWORD dwMilliSecsTimeout, FILTER_STATE *pState)
 488 {
 489     AsyncReader *This = (AsyncReader *)iface;
 490
 491     TRACE("(%u, %p)\n", dwMilliSecsTimeout, pState);
 492
 493     *pState = This->state;
 494
 495     return S_OK;
 496 }
 497
 498 static HRESULT WINAPI AsyncReader_SetSyncSource(IBaseFilter * iface, IReferenceClock *pClock)
 499 {
 500 /*    AsyncReader *This = (AsyncReader *)iface;*/
 501
 502     TRACE("(%p)\n", pClock);
 503
 504     return S_OK;
 505 }
 506
 507 static HRESULT WINAPI AsyncReader_GetSyncSource(IBaseFilter * iface, IReferenceClock **ppClock)
 508 {
 509 /*    AsyncReader *This = (AsyncReader *)iface;*/
 510
 511     TRACE("(%p)\n", ppClock);
 512
 513     return S_OK;
 514 }
 515
 516 /** IBaseFilter methods **/
 517
 518 static HRESULT WINAPI AsyncReader_EnumPins(IBaseFilter * iface, IEnumPins **ppEnum)
 519 {
 520     ENUMPINDETAILS epd;
 521     AsyncReader *This = (AsyncReader *)iface;
 522
 523     TRACE("(%p)\n", ppEnum);
 524
 525     epd.cPins = This->pOutputPin ? 1 : 0;
 526     epd.ppPins = &This->pOutputPin;
 527     return IEnumPinsImpl_Construct(&epd, ppEnum);
 528 }
 529
 530 static HRESULT WINAPI AsyncReader_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
 531 {
 532     FIXME("(%s, %p)\n", debugstr_w(Id), ppPin);
 533
 534     return E_NOTIMPL;
 535 }
 536
 537 static HRESULT WINAPI AsyncReader_QueryFilterInfo(IBaseFilter * iface, FILTER_INFO *pInfo)
 538 {
 539     AsyncReader *This = (AsyncReader *)iface;
 540
 541     TRACE("(%p)\n", pInfo);
 542
 543     strcpyW(pInfo->achName, This->filterInfo.achName);
 544     pInfo->pGraph = This->filterInfo.pGraph;
 545
 546     if (pInfo->pGraph)
 547         IFilterGraph_AddRef(pInfo->pGraph);
 548
 549     return S_OK;
 550 }
 551
 552 static HRESULT WINAPI AsyncReader_JoinFilterGraph(IBaseFilter * iface, IFilterGraph *pGraph, LPCWSTR pName)
 553 {
 554     AsyncReader *This = (AsyncReader *)iface;
 555
 556     TRACE("(%p, %s)\n", pGraph, debugstr_w(pName));
 557
 558     if (pName)
 559         strcpyW(This->filterInfo.achName, pName);
 560     else
 561         *This->filterInfo.achName = 0;
 562     This->filterInfo.pGraph = pGraph; /* NOTE: do NOT increase ref. count */
 563
 564     return S_OK;
 565 }
 566
 567 static HRESULT WINAPI AsyncReader_QueryVendorInfo(IBaseFilter * iface, LPWSTR *pVendorInfo)
 568 {
 569     FIXME("(%p)\n", pVendorInfo);
 570
 571     return E_NOTIMPL;
 572 }
 573
 574 static const IBaseFilterVtbl AsyncReader_Vtbl =
 575 {
 576     AsyncReader_QueryInterface,
 577     AsyncReader_AddRef,
 578     AsyncReader_Release,
 579     AsyncReader_GetClassID,
 580     AsyncReader_Stop,
 581     AsyncReader_Pause,
 582     AsyncReader_Run,
 583     AsyncReader_GetState,
 584     AsyncReader_SetSyncSource,
 585     AsyncReader_GetSyncSource,
 586     AsyncReader_EnumPins,
 587     AsyncReader_FindPin,
 588     AsyncReader_QueryFilterInfo,
 589     AsyncReader_JoinFilterGraph,
 590     AsyncReader_QueryVendorInfo
 591 };
 592
 593 static HRESULT WINAPI FileSource_QueryInterface(IFileSourceFilter * iface, REFIID riid, LPVOID * ppv)
 594 {
 595     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 596
 597     return IBaseFilter_QueryInterface((IFileSourceFilter*)&This->lpVtbl, riid, ppv);
 598 }
 599
 600 static ULONG WINAPI FileSource_AddRef(IFileSourceFilter * iface)
 601 {
 602     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 603
 604     return IBaseFilter_AddRef((IFileSourceFilter*)&This->lpVtbl);
 605 }
 606
 607 static ULONG WINAPI FileSource_Release(IFileSourceFilter * iface)
 608 {
 609     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 610
 611     return IBaseFilter_Release((IFileSourceFilter*)&This->lpVtbl);
 612 }
 613
 614 static HRESULT WINAPI FileSource_Load(IFileSourceFilter * iface, LPCOLESTR pszFileName, const AM_MEDIA_TYPE * pmt)
 615 {
 616     HRESULT hr;
 617     HANDLE hFile;
 618     IAsyncReader * pReader = NULL;
 619     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 620
 621     TRACE("(%s, %p)\n", debugstr_w(pszFileName), pmt);
 622
 623     /* open file */
 624     /* FIXME: check the sharing values that native uses */
 625     hFile = CreateFileW(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
 626
 627     if (hFile == INVALID_HANDLE_VALUE)
 628     {
 629         return HRESULT_FROM_WIN32(GetLastError());
 630     }
 631
 632     /* create pin */
 633     hr = FileAsyncReader_Construct(hFile, (IBaseFilter *)&This->lpVtbl, &This->csFilter, &This->pOutputPin);
 634
 635     if (SUCCEEDED(hr))
 636         hr = IPin_QueryInterface(This->pOutputPin, &IID_IAsyncReader, (LPVOID *)&pReader);
 637
 638     /* store file name & media type */
 639     if (SUCCEEDED(hr))
 640     {
 641         This->pszFileName = CoTaskMemAlloc((strlenW(pszFileName) + 1) * sizeof(WCHAR));
 642         strcpyW(This->pszFileName, pszFileName);
 643         This->pmt = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE));
 644         if (!pmt)
 645         {
 646             This->pmt->bFixedSizeSamples = TRUE;
 647             This->pmt->bTemporalCompression = FALSE;
 648             This->pmt->cbFormat = 0;
 649             This->pmt->pbFormat = NULL;
 650             This->pmt->pUnk = NULL;
 651             This->pmt->lSampleSize = 0;
 652             This->pmt->formattype = FORMAT_None;
 653             hr = GetClassMediaFile(pReader, pszFileName, &This->pmt->majortype, &This->pmt->subtype);
 654             if (FAILED(hr))
 655             {
 656                 CoTaskMemFree(This->pmt);
 657                 This->pmt = NULL;
 658             }
 659         }
 660         else
 661             CopyMediaType(This->pmt, pmt);
 662     }
 663
 664     if (pReader)
 665         IAsyncReader_Release(pReader);
 666
 667     if (FAILED(hr))
 668     {
 669         if (This->pOutputPin)
 670         {
 671             IPin_Release(This->pOutputPin);
 672             This->pOutputPin = NULL;
 673         }
 674
 675         CoTaskMemFree(This->pszFileName);
 676         This->pszFileName = NULL;
 677
 678         CloseHandle(hFile);
 679     }
 680
 681     /* FIXME: check return codes */
 682     return hr;
 683 }
 684
 685 static HRESULT WINAPI FileSource_GetCurFile(IFileSourceFilter * iface, LPOLESTR * ppszFileName, AM_MEDIA_TYPE * pmt)
 686 {
 687     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 688
 689     TRACE("(%p, %p)\n", ppszFileName, pmt);
 690
 691     if (!ppszFileName)
 692         return E_POINTER;
 693
 694     /* copy file name & media type if available, otherwise clear the outputs */
 695     if (This->pszFileName)
 696     {
 697         *ppszFileName = CoTaskMemAlloc((strlenW(This->pszFileName) + 1) * sizeof(WCHAR));
 698         strcpyW(*ppszFileName, This->pszFileName);
 699     }
 700     else
 701         *ppszFileName = NULL;
 702
 703     if (pmt)
 704     {
 705         if (This->pmt)
 706             CopyMediaType(pmt, This->pmt);
 707         else
 708             ZeroMemory(pmt, sizeof(*pmt));
 709     }
 710
 711     return S_OK;
 712 }
 713
 714 static const IFileSourceFilterVtbl FileSource_Vtbl =
 715 {
 716     FileSource_QueryInterface,
 717     FileSource_AddRef,
 718     FileSource_Release,
 719     FileSource_Load,
 720     FileSource_GetCurFile
 721 };
 722
 723
 724 /* the dwUserData passed back to user */
 725 typedef struct DATAREQUEST
 726 {
 727     IMediaSample * pSample; /* sample passed to us by user */
 728     DWORD_PTR dwUserData; /* user data passed to us */
 729     OVERLAPPED ovl; /* our overlapped structure */
 730
 731     struct DATAREQUEST * pNext; /* next data request in list */
 732 } DATAREQUEST;
 733
 734 static void queue(DATAREQUEST * pHead, DATAREQUEST * pItem)
 735 {
 736     DATAREQUEST * pCurrent;
 737     for (pCurrent = pHead; pCurrent->pNext; pCurrent = pCurrent->pNext)
 738         ;
 739     pCurrent->pNext = pItem;
 740 }
 741
 742 typedef struct FileAsyncReader
 743 {
 744     OutputPin pin;
 745     const struct IAsyncReaderVtbl * lpVtblAR;
 746
 747     HANDLE hFile;
 748     HANDLE hEvent;
 749     BOOL bFlushing;
 750     DATAREQUEST * pHead; /* head of data request list */
 751     CRITICAL_SECTION csList; /* critical section to protect operations on list */
 752 } FileAsyncReader;
 753
 754 static inline FileAsyncReader *impl_from_IAsyncReader( IAsyncReader *iface )
 755 {
 756     return (FileAsyncReader *)((char*)iface - FIELD_OFFSET(FileAsyncReader, lpVtblAR));
 757 }
 758
 759 static HRESULT AcceptProcAFR(LPVOID iface, const AM_MEDIA_TYPE *pmt)
 760 {
 761     AsyncReader *This = (AsyncReader *)iface;
 762
 763     FIXME("(%p, %p)\n", iface, pmt);
 764
 765     if (IsEqualGUID(&pmt->majortype, &This->pmt->majortype) &&
 766         IsEqualGUID(&pmt->subtype, &This->pmt->subtype) &&
 767         IsEqualGUID(&pmt->formattype, &FORMAT_None))
 768         return S_OK;
 769
 770     return S_FALSE;
 771 }
 772
 773 /* overriden pin functions */
 774
 775 static HRESULT WINAPI FileAsyncReaderPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 776 {
 777     FileAsyncReader *This = (FileAsyncReader *)iface;
 778     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 779
 780     *ppv = NULL;
 781
 782     if (IsEqualIID(riid, &IID_IUnknown))
 783         *ppv = (LPVOID)This;
 784     else if (IsEqualIID(riid, &IID_IPin))
 785         *ppv = (LPVOID)This;
 786     else if (IsEqualIID(riid, &IID_IAsyncReader))
 787         *ppv = (LPVOID)&This->lpVtblAR;
 788
 789     if (*ppv)
 790     {
 791         IUnknown_AddRef((IUnknown *)(*ppv));
 792         return S_OK;
 793     }
 794
 795     FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 796
 797     return E_NOINTERFACE;
 798 }
 799
 800 static ULONG WINAPI FileAsyncReaderPin_Release(IPin * iface)
 801 {
 802     FileAsyncReader *This = (FileAsyncReader *)iface;
 803     ULONG refCount = InterlockedDecrement(&This->pin.pin.refCount);
 804
 805     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 806
 807     if (!refCount)
 808     {
 809         DATAREQUEST * pCurrent;
 810         DATAREQUEST * pNext;
 811         for (pCurrent = This->pHead; pCurrent; pCurrent = pNext)
 812         {
 813             pNext = pCurrent->pNext;
 814             CoTaskMemFree(pCurrent);
 815         }
 816         CloseHandle(This->hFile);
 817         CloseHandle(This->hEvent);
 818         This->csList.DebugInfo->Spare[0] = 0;
 819         DeleteCriticalSection(&This->csList);
 820         CoTaskMemFree(This);
 821         return 0;
 822     }
 823     return refCount;
 824 }
 825
 826 static HRESULT WINAPI FileAsyncReaderPin_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum)
 827 {
 828     ENUMMEDIADETAILS emd;
 829     FileAsyncReader *This = (FileAsyncReader *)iface;
 830
 831     TRACE("(%p)\n", ppEnum);
 832
 833     emd.cMediaTypes = 1;
 834     emd.pMediaTypes = ((AsyncReader *)This->pin.pin.pinInfo.pFilter)->pmt;
 835
 836     return IEnumMediaTypesImpl_Construct(&emd, ppEnum);
 837 }
 838
 839 static const IPinVtbl FileAsyncReaderPin_Vtbl =
 840 {
 841     FileAsyncReaderPin_QueryInterface,
 842     IPinImpl_AddRef,
 843     FileAsyncReaderPin_Release,
 844     OutputPin_Connect,
 845     OutputPin_ReceiveConnection,
 846     IPinImpl_Disconnect,
 847     IPinImpl_ConnectedTo,
 848     IPinImpl_ConnectionMediaType,
 849     IPinImpl_QueryPinInfo,
 850     IPinImpl_QueryDirection,
 851     IPinImpl_QueryId,
 852     IPinImpl_QueryAccept,
 853     FileAsyncReaderPin_EnumMediaTypes,
 854     IPinImpl_QueryInternalConnections,
 855     OutputPin_EndOfStream,
 856     OutputPin_BeginFlush,
 857     OutputPin_EndFlush,
 858     OutputPin_NewSegment
 859 };
 860
 861 /* Function called as a helper to IPin_Connect */
 862 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 863 /* this differs from standard OutputPin_ConnectSpecific only in that it
 864  * doesn't need the IMemInputPin interface on the receiving pin */
 865 static HRESULT FileAsyncReaderPin_ConnectSpecific(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 866 {
 867     OutputPin *This = (OutputPin *)iface;
 868     HRESULT hr;
 869
 870     TRACE("(%p, %p)\n", pReceivePin, pmt);
 871     dump_AM_MEDIA_TYPE(pmt);
 872
 873     /* FIXME: call queryacceptproc */
 874
 875     This->pin.pConnectedTo = pReceivePin;
 876     IPin_AddRef(pReceivePin);
 877     CopyMediaType(&This->pin.mtCurrent, pmt);
 878
 879     hr = IPin_ReceiveConnection(pReceivePin, iface, pmt);
 880
 881     if (FAILED(hr))
 882     {
 883         IPin_Release(This->pin.pConnectedTo);
 884         This->pin.pConnectedTo = NULL;
 885         FreeMediaType(&This->pin.mtCurrent);
 886     }
 887
 888     TRACE(" -- %x\n", hr);
 889     return hr;
 890 }
 891
 892 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 893 {
 894     FileAsyncReader * pPinImpl;
 895     PIN_INFO piOutput;
 896
 897     *ppPin = NULL;
 898
 899     pPinImpl = CoTaskMemAlloc(sizeof(*pPinImpl));
 900
 901     if (!pPinImpl)
 902         return E_OUTOFMEMORY;
 903
 904     piOutput.dir = PINDIR_OUTPUT;
 905     piOutput.pFilter = pBaseFilter;
 906     strcpyW(piOutput.achName, wszOutputPinName);
 907
 908     if (SUCCEEDED(OutputPin_Init(&piOutput, NULL, pBaseFilter, AcceptProcAFR, pCritSec, &pPinImpl->pin)))
 909     {
 910         pPinImpl->pin.pin.lpVtbl = &FileAsyncReaderPin_Vtbl;
 911         pPinImpl->lpVtblAR = &FileAsyncReader_Vtbl;
 912         pPinImpl->hFile = hFile;
 913         pPinImpl->hEvent = CreateEventW(NULL, 0, 0, NULL);
 914         pPinImpl->bFlushing = FALSE;
 915         pPinImpl->pHead = NULL;
 916         pPinImpl->pin.pConnectSpecific = FileAsyncReaderPin_ConnectSpecific;
 917         InitializeCriticalSection(&pPinImpl->csList);
 918         pPinImpl->csList.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FileAsyncReader.csList");
 919
 920         *ppPin = (IPin *)(&pPinImpl->pin.pin.lpVtbl);
 921         return S_OK;
 922     }
 923
 924     CoTaskMemFree(pPinImpl);
 925     return E_FAIL;
 926 }
 927
 928 /* IAsyncReader */
 929
 930 static HRESULT WINAPI FileAsyncReader_QueryInterface(IAsyncReader * iface, REFIID riid, LPVOID * ppv)
 931 {
 932     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 933
 934     return IPin_QueryInterface((IPin *)This, riid, ppv);
 935 }
 936
 937 static ULONG WINAPI FileAsyncReader_AddRef(IAsyncReader * iface)
 938 {
 939     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 940
 941     return IPin_AddRef((IPin *)This);
 942 }
 943
 944 static ULONG WINAPI FileAsyncReader_Release(IAsyncReader * iface)
 945 {
 946     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 947
 948     return IPin_Release((IPin *)This);
 949 }
 950
 951 #define DEF_ALIGNMENT 1
 952
 953 static HRESULT WINAPI FileAsyncReader_RequestAllocator(IAsyncReader * iface, IMemAllocator * pPreferred, ALLOCATOR_PROPERTIES * pProps, IMemAllocator ** ppActual)
 954 {
 955     HRESULT hr = S_OK;
 956
 957     TRACE("(%p, %p, %p)\n", pPreferred, pProps, ppActual);
 958
 959     if (!pProps->cbAlign || (pProps->cbAlign % DEF_ALIGNMENT) != 0)
 960         pProps->cbAlign = DEF_ALIGNMENT;
 961
 962     if (pPreferred)
 963     {
 964         ALLOCATOR_PROPERTIES PropsActual;
 965         hr = IMemAllocator_SetProperties(pPreferred, pProps, &PropsActual);
 966         /* FIXME: check we are still aligned */
 967         if (SUCCEEDED(hr))
 968         {
 969             IMemAllocator_AddRef(pPreferred);
 970             *ppActual = pPreferred;
 971             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 972             return S_OK;
 973         }
 974     }
 975
 976     pPreferred = NULL;
 977
 978     hr = CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC, &IID_IMemAllocator, (LPVOID *)&pPreferred);
 979
 980     if (SUCCEEDED(hr))
 981     {
 982         ALLOCATOR_PROPERTIES PropsActual;
 983         hr = IMemAllocator_SetProperties(pPreferred, pProps, &PropsActual);
 984         /* FIXME: check we are still aligned */
 985         if (SUCCEEDED(hr))
 986         {
 987             *ppActual = pPreferred;
 988             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 989             return S_OK;
 990         }
 991     }
 992
 993     if (FAILED(hr))
 994     {
 995         *ppActual = NULL;
 996         if (pPreferred)
 997             IMemAllocator_Release(pPreferred);
 998     }
 999
1000     TRACE("-- %x\n", hr);
1001     return hr;
1002 }
1003
1004 /* we could improve the Request/WaitForNext mechanism by allowing out of order samples.
1005  * however, this would be quite complicated to do and may be a bit error prone */
1006 static HRESULT WINAPI FileAsyncReader_Request(IAsyncReader * iface, IMediaSample * pSample, DWORD_PTR dwUser)
1007 {
1008     REFERENCE_TIME Start;
1009     REFERENCE_TIME Stop;
1010     DATAREQUEST * pDataRq;
1011     BYTE * pBuffer;
1012     HRESULT hr = S_OK;
1013     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1014
1015     TRACE("(%p, %lx)\n", pSample, dwUser);
1016
1017     /* check flushing state */
1018     if (This->bFlushing)
1019         return VFW_E_WRONG_STATE;
1020
1021     if (!(pDataRq = CoTaskMemAlloc(sizeof(*pDataRq))))
1022         hr = E_OUTOFMEMORY;
1023
1024     /* get start and stop positions in bytes */
1025     if (SUCCEEDED(hr))
1026         hr = IMediaSample_GetTime(pSample, &Start, &Stop);
1027
1028     if (SUCCEEDED(hr))
1029         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1030
1031     if (SUCCEEDED(hr))
1032     {
1033         DWORD dwLength = (DWORD) BYTES_FROM_MEDIATIME(Stop - Start);
1034
1035         pDataRq->ovl.u.s.Offset = (DWORD) BYTES_FROM_MEDIATIME(Start);
1036         pDataRq->ovl.u.s.OffsetHigh = (DWORD)(BYTES_FROM_MEDIATIME(Start) >> (sizeof(DWORD) * 8));
1037         pDataRq->ovl.hEvent = This->hEvent;
1038         pDataRq->dwUserData = dwUser;
1039         pDataRq->pNext = NULL;
1040         /* we violate traditional COM rules here by maintaining
1041          * a reference to the sample, but not calling AddRef, but
1042          * that's what MSDN says to do */
1043         pDataRq->pSample = pSample;
1044
1045         EnterCriticalSection(&This->csList);
1046         {
1047             if (This->pHead)
1048                 /* adds data request to end of list */
1049                 queue(This->pHead, pDataRq);
1050             else
1051                 This->pHead = pDataRq;
1052         }
1053         LeaveCriticalSection(&This->csList);
1054
1055         /* this is definitely not how it is implemented on Win9x
1056          * as they do not support async reads on files, but it is
1057          * sooo much easier to use this than messing around with threads!
1058          */
1059         if (!ReadFile(This->hFile, pBuffer, dwLength, NULL, &pDataRq->ovl))
1060             hr = HRESULT_FROM_WIN32(GetLastError());
1061
1062         /* ERROR_IO_PENDING is not actually an error since this is what we want! */
1063         if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1064             hr = S_OK;
1065     }
1066
1067     if (FAILED(hr) && pDataRq)
1068     {
1069         EnterCriticalSection(&This->csList);
1070         {
1071             DATAREQUEST * pCurrent;
1072             for (pCurrent = This->pHead; pCurrent && pCurrent->pNext; pCurrent = pCurrent->pNext)
1073                 if (pCurrent->pNext == pDataRq)
1074                 {
1075                     pCurrent->pNext = pDataRq->pNext;
1076                     break;
1077                 }
1078         }
1079         LeaveCriticalSection(&This->csList);
1080         CoTaskMemFree(pDataRq);
1081     }
1082
1083     TRACE("-- %x\n", hr);
1084     return hr;
1085 }
1086
1087 static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dwTimeout, IMediaSample ** ppSample, DWORD_PTR * pdwUser)
1088 {
1089     HRESULT hr = S_OK;
1090     DWORD dwBytes = 0;
1091     DATAREQUEST * pDataRq = NULL;
1092     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1093
1094     TRACE("(%u, %p, %p)\n", dwTimeout, ppSample, pdwUser);
1095
1096     /* FIXME: we could do with improving this by waiting for an array of event handles
1097      * and then determining which one finished and removing that from the list, otherwise
1098      * we will end up waiting for longer than we should do, if a later request finishes
1099      * before an earlier one */
1100
1101     *ppSample = NULL;
1102     *pdwUser = 0;
1103
1104     /* we return immediately if flushing */
1105     if (This->bFlushing)
1106         hr = VFW_E_WRONG_STATE;
1107
1108     if (SUCCEEDED(hr))
1109     {
1110         /* wait for the read to finish or timeout */
1111         if (WaitForSingleObject(This->hEvent, dwTimeout) == WAIT_TIMEOUT)
1112             hr = VFW_E_TIMEOUT;
1113     }
1114     if (SUCCEEDED(hr))
1115     {
1116         EnterCriticalSection(&This->csList);
1117         {
1118             pDataRq = This->pHead;
1119             if (pDataRq == NULL)
1120                 hr = E_FAIL;
1121             else
1122                 This->pHead = pDataRq->pNext;
1123         }
1124         LeaveCriticalSection(&This->csList);
1125     }
1126
1127     if (SUCCEEDED(hr))
1128     {
1129         /* get any errors */
1130         if (!GetOverlappedResult(This->hFile, &pDataRq->ovl, &dwBytes, FALSE))
1131             hr = HRESULT_FROM_WIN32(GetLastError());
1132     }
1133
1134     if (SUCCEEDED(hr))
1135     {
1136         IMediaSample_SetActualDataLength(pDataRq->pSample, dwBytes);
1137         *ppSample = pDataRq->pSample;
1138         *pdwUser = pDataRq->dwUserData;
1139     }
1140
1141     /* no need to close event handle since we will close it when the pin is destroyed */
1142     CoTaskMemFree(pDataRq);
1143
1144     TRACE("-- %x\n", hr);
1145     return hr;
1146 }
1147
1148 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer);
1149
1150 static HRESULT WINAPI FileAsyncReader_SyncReadAligned(IAsyncReader * iface, IMediaSample * pSample)
1151 {
1152     BYTE * pBuffer;
1153     REFERENCE_TIME tStart;
1154     REFERENCE_TIME tStop;
1155     HRESULT hr;
1156
1157     TRACE("(%p)\n", pSample);
1158
1159     hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
1160
1161     if (SUCCEEDED(hr))
1162         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1163
1164     if (SUCCEEDED(hr))
1165         hr = FileAsyncReader_SyncRead(iface,
1166             BYTES_FROM_MEDIATIME(tStart),
1167             (LONG) BYTES_FROM_MEDIATIME(tStop - tStart),
1168             pBuffer);
1169
1170     TRACE("-- %x\n", hr);
1171     return hr;
1172 }
1173
1174 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer)
1175 {
1176     OVERLAPPED ovl;
1177     HRESULT hr = S_OK;
1178     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1179
1180     TRACE("(%x%08x, %d, %p)\n", (ULONG)(llPosition >> 32), (ULONG)llPosition, lLength, pBuffer);
1181
1182     ZeroMemory(&ovl, sizeof(ovl));
1183
1184     ovl.hEvent = CreateEventW(NULL, 0, 0, NULL);
1185     /* NOTE: llPosition is the actual byte position to start reading from */
1186     ovl.u.s.Offset = (DWORD) llPosition;
1187     ovl.u.s.OffsetHigh = (DWORD) (llPosition >> (sizeof(DWORD) * 8));
1188
1189     if (!ReadFile(This->hFile, pBuffer, lLength, NULL, &ovl))
1190         hr = HRESULT_FROM_WIN32(GetLastError());
1191
1192     if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1193         hr = S_OK;
1194
1195     if (SUCCEEDED(hr))
1196     {
1197         DWORD dwBytesRead;
1198
1199         if (!GetOverlappedResult(This->hFile, &ovl, &dwBytesRead, TRUE))
1200             hr = HRESULT_FROM_WIN32(GetLastError());
1201     }
1202
1203     CloseHandle(ovl.hEvent);
1204
1205     TRACE("-- %x\n", hr);
1206     return hr;
1207 }
1208
1209 static HRESULT WINAPI FileAsyncReader_Length(IAsyncReader * iface, LONGLONG * pTotal, LONGLONG * pAvailable)
1210 {
1211     DWORD dwSizeLow;
1212     DWORD dwSizeHigh;
1213     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1214
1215     TRACE("(%p, %p)\n", pTotal, pAvailable);
1216
1217     if (((dwSizeLow = GetFileSize(This->hFile, &dwSizeHigh)) == -1) &&
1218         (GetLastError() != NO_ERROR))
1219         return HRESULT_FROM_WIN32(GetLastError());
1220
1221     *pTotal = (LONGLONG)dwSizeLow | (LONGLONG)dwSizeHigh << (sizeof(DWORD) * 8);
1222
1223     *pAvailable = *pTotal;
1224
1225     return S_OK;
1226 }
1227
1228 static HRESULT WINAPI FileAsyncReader_BeginFlush(IAsyncReader * iface)
1229 {
1230     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1231
1232     TRACE("()\n");
1233
1234     This->bFlushing = TRUE;
1235     CancelIo(This->hFile);
1236     SetEvent(This->hEvent);
1237
1238     /* FIXME: free list */
1239
1240     return S_OK;
1241 }
1242
1243 static HRESULT WINAPI FileAsyncReader_EndFlush(IAsyncReader * iface)
1244 {
1245     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1246
1247     TRACE("()\n");
1248
1249     This->bFlushing = FALSE;
1250
1251     return S_OK;
1252 }
1253
1254 static const IAsyncReaderVtbl FileAsyncReader_Vtbl =
1255 {
1256     FileAsyncReader_QueryInterface,
1257     FileAsyncReader_AddRef,
1258     FileAsyncReader_Release,
1259     FileAsyncReader_RequestAllocator,
1260     FileAsyncReader_Request,
1261     FileAsyncReader_WaitForNext,
1262     FileAsyncReader_SyncReadAligned,
1263     FileAsyncReader_SyncRead,
1264     FileAsyncReader_Length,
1265     FileAsyncReader_BeginFlush,
1266     FileAsyncReader_EndFlush,
1267 };