git.oblomov.eu Git - wine/blob - 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     *majorType = GUID_NULL;
 241     *minorType = GUID_NULL;
 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     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IMediaSeeking))
 397         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 398
 399     return E_NOINTERFACE;
 400 }
 401
 402 static ULONG WINAPI AsyncReader_AddRef(IBaseFilter * iface)
 403 {
 404     AsyncReader *This = (AsyncReader *)iface;
 405     ULONG refCount = InterlockedIncrement(&This->refCount);
 406
 407     TRACE("(%p)->() AddRef from %d\n", This, refCount - 1);
 408
 409     return refCount;
 410 }
 411
 412 static ULONG WINAPI AsyncReader_Release(IBaseFilter * iface)
 413 {
 414     AsyncReader *This = (AsyncReader *)iface;
 415     ULONG refCount = InterlockedDecrement(&This->refCount);
 416
 417     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 418
 419     if (!refCount)
 420     {
 421         if (This->pOutputPin)
 422         {
 423             IPin *pConnectedTo;
 424             if(SUCCEEDED(IPin_ConnectedTo(This->pOutputPin, &pConnectedTo)))
 425             {
 426                 IPin_Disconnect(pConnectedTo);
 427                 IPin_Release(pConnectedTo);
 428             }
 429             IPin_Disconnect(This->pOutputPin);
 430             IPin_Release(This->pOutputPin);
 431         }
 432         This->csFilter.DebugInfo->Spare[0] = 0;
 433         DeleteCriticalSection(&This->csFilter);
 434         This->lpVtbl = NULL;
 435         CoTaskMemFree(This);
 436         return 0;
 437     }
 438     else
 439         return refCount;
 440 }
 441
 442 /** IPersist methods **/
 443
 444 static HRESULT WINAPI AsyncReader_GetClassID(IBaseFilter * iface, CLSID * pClsid)
 445 {
 446     TRACE("(%p)\n", pClsid);
 447
 448     *pClsid = CLSID_AsyncReader;
 449
 450     return S_OK;
 451 }
 452
 453 /** IMediaFilter methods **/
 454
 455 static HRESULT WINAPI AsyncReader_Stop(IBaseFilter * iface)
 456 {
 457     AsyncReader *This = (AsyncReader *)iface;
 458
 459     TRACE("()\n");
 460
 461     This->state = State_Stopped;
 462
 463     return S_OK;
 464 }
 465
 466 static HRESULT WINAPI AsyncReader_Pause(IBaseFilter * iface)
 467 {
 468     AsyncReader *This = (AsyncReader *)iface;
 469
 470     TRACE("()\n");
 471
 472     This->state = State_Paused;
 473
 474     return S_OK;
 475 }
 476
 477 static HRESULT WINAPI AsyncReader_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
 478 {
 479     AsyncReader *This = (AsyncReader *)iface;
 480
 481     TRACE("(%x%08x)\n", (ULONG)(tStart >> 32), (ULONG)tStart);
 482
 483     This->state = State_Running;
 484
 485     return S_OK;
 486 }
 487
 488 static HRESULT WINAPI AsyncReader_GetState(IBaseFilter * iface, DWORD dwMilliSecsTimeout, FILTER_STATE *pState)
 489 {
 490     AsyncReader *This = (AsyncReader *)iface;
 491
 492     TRACE("(%u, %p)\n", dwMilliSecsTimeout, pState);
 493
 494     *pState = This->state;
 495
 496     return S_OK;
 497 }
 498
 499 static HRESULT WINAPI AsyncReader_SetSyncSource(IBaseFilter * iface, IReferenceClock *pClock)
 500 {
 501 /*    AsyncReader *This = (AsyncReader *)iface;*/
 502
 503     TRACE("(%p)\n", pClock);
 504
 505     return S_OK;
 506 }
 507
 508 static HRESULT WINAPI AsyncReader_GetSyncSource(IBaseFilter * iface, IReferenceClock **ppClock)
 509 {
 510 /*    AsyncReader *This = (AsyncReader *)iface;*/
 511
 512     TRACE("(%p)\n", ppClock);
 513
 514     return S_OK;
 515 }
 516
 517 /** IBaseFilter methods **/
 518
 519 static HRESULT WINAPI AsyncReader_EnumPins(IBaseFilter * iface, IEnumPins **ppEnum)
 520 {
 521     ENUMPINDETAILS epd;
 522     AsyncReader *This = (AsyncReader *)iface;
 523
 524     TRACE("(%p)\n", ppEnum);
 525
 526     epd.cPins = This->pOutputPin ? 1 : 0;
 527     epd.ppPins = &This->pOutputPin;
 528     return IEnumPinsImpl_Construct(&epd, ppEnum);
 529 }
 530
 531 static HRESULT WINAPI AsyncReader_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
 532 {
 533     FIXME("(%s, %p)\n", debugstr_w(Id), ppPin);
 534
 535     return E_NOTIMPL;
 536 }
 537
 538 static HRESULT WINAPI AsyncReader_QueryFilterInfo(IBaseFilter * iface, FILTER_INFO *pInfo)
 539 {
 540     AsyncReader *This = (AsyncReader *)iface;
 541
 542     TRACE("(%p)\n", pInfo);
 543
 544     strcpyW(pInfo->achName, This->filterInfo.achName);
 545     pInfo->pGraph = This->filterInfo.pGraph;
 546
 547     if (pInfo->pGraph)
 548         IFilterGraph_AddRef(pInfo->pGraph);
 549
 550     return S_OK;
 551 }
 552
 553 static HRESULT WINAPI AsyncReader_JoinFilterGraph(IBaseFilter * iface, IFilterGraph *pGraph, LPCWSTR pName)
 554 {
 555     AsyncReader *This = (AsyncReader *)iface;
 556
 557     TRACE("(%p, %s)\n", pGraph, debugstr_w(pName));
 558
 559     if (pName)
 560         strcpyW(This->filterInfo.achName, pName);
 561     else
 562         *This->filterInfo.achName = 0;
 563     This->filterInfo.pGraph = pGraph; /* NOTE: do NOT increase ref. count */
 564
 565     return S_OK;
 566 }
 567
 568 static HRESULT WINAPI AsyncReader_QueryVendorInfo(IBaseFilter * iface, LPWSTR *pVendorInfo)
 569 {
 570     FIXME("(%p)\n", pVendorInfo);
 571
 572     return E_NOTIMPL;
 573 }
 574
 575 static const IBaseFilterVtbl AsyncReader_Vtbl =
 576 {
 577     AsyncReader_QueryInterface,
 578     AsyncReader_AddRef,
 579     AsyncReader_Release,
 580     AsyncReader_GetClassID,
 581     AsyncReader_Stop,
 582     AsyncReader_Pause,
 583     AsyncReader_Run,
 584     AsyncReader_GetState,
 585     AsyncReader_SetSyncSource,
 586     AsyncReader_GetSyncSource,
 587     AsyncReader_EnumPins,
 588     AsyncReader_FindPin,
 589     AsyncReader_QueryFilterInfo,
 590     AsyncReader_JoinFilterGraph,
 591     AsyncReader_QueryVendorInfo
 592 };
 593
 594 static HRESULT WINAPI FileSource_QueryInterface(IFileSourceFilter * iface, REFIID riid, LPVOID * ppv)
 595 {
 596     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 597
 598     return IBaseFilter_QueryInterface((IFileSourceFilter*)&This->lpVtbl, riid, ppv);
 599 }
 600
 601 static ULONG WINAPI FileSource_AddRef(IFileSourceFilter * iface)
 602 {
 603     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 604
 605     return IBaseFilter_AddRef((IFileSourceFilter*)&This->lpVtbl);
 606 }
 607
 608 static ULONG WINAPI FileSource_Release(IFileSourceFilter * iface)
 609 {
 610     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 611
 612     return IBaseFilter_Release((IFileSourceFilter*)&This->lpVtbl);
 613 }
 614
 615 static HRESULT WINAPI FileSource_Load(IFileSourceFilter * iface, LPCOLESTR pszFileName, const AM_MEDIA_TYPE * pmt)
 616 {
 617     HRESULT hr;
 618     HANDLE hFile;
 619     IAsyncReader * pReader = NULL;
 620     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 621
 622     TRACE("(%s, %p)\n", debugstr_w(pszFileName), pmt);
 623
 624     /* open file */
 625     /* FIXME: check the sharing values that native uses */
 626     hFile = CreateFileW(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
 627
 628     if (hFile == INVALID_HANDLE_VALUE)
 629     {
 630         return HRESULT_FROM_WIN32(GetLastError());
 631     }
 632
 633     /* create pin */
 634     hr = FileAsyncReader_Construct(hFile, (IBaseFilter *)&This->lpVtbl, &This->csFilter, &This->pOutputPin);
 635
 636     if (SUCCEEDED(hr))
 637         hr = IPin_QueryInterface(This->pOutputPin, &IID_IAsyncReader, (LPVOID *)&pReader);
 638
 639     /* store file name & media type */
 640     if (SUCCEEDED(hr))
 641     {
 642         This->pszFileName = CoTaskMemAlloc((strlenW(pszFileName) + 1) * sizeof(WCHAR));
 643         strcpyW(This->pszFileName, pszFileName);
 644         This->pmt = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE));
 645         if (!pmt)
 646         {
 647             This->pmt->bFixedSizeSamples = TRUE;
 648             This->pmt->bTemporalCompression = FALSE;
 649             This->pmt->cbFormat = 0;
 650             This->pmt->pbFormat = NULL;
 651             This->pmt->pUnk = NULL;
 652             This->pmt->lSampleSize = 0;
 653             This->pmt->formattype = FORMAT_None;
 654             hr = GetClassMediaFile(pReader, pszFileName, &This->pmt->majortype, &This->pmt->subtype);
 655             if (FAILED(hr))
 656             {
 657                 CoTaskMemFree(This->pmt);
 658                 This->pmt = NULL;
 659             }
 660         }
 661         else
 662             CopyMediaType(This->pmt, pmt);
 663     }
 664
 665     if (pReader)
 666         IAsyncReader_Release(pReader);
 667
 668     if (FAILED(hr))
 669     {
 670         if (This->pOutputPin)
 671         {
 672             IPin_Release(This->pOutputPin);
 673             This->pOutputPin = NULL;
 674         }
 675
 676         CoTaskMemFree(This->pszFileName);
 677         This->pszFileName = NULL;
 678
 679         CloseHandle(hFile);
 680     }
 681
 682     /* FIXME: check return codes */
 683     return hr;
 684 }
 685
 686 static HRESULT WINAPI FileSource_GetCurFile(IFileSourceFilter * iface, LPOLESTR * ppszFileName, AM_MEDIA_TYPE * pmt)
 687 {
 688     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 689
 690     TRACE("(%p, %p)\n", ppszFileName, pmt);
 691
 692     if (!ppszFileName)
 693         return E_POINTER;
 694
 695     /* copy file name & media type if available, otherwise clear the outputs */
 696     if (This->pszFileName)
 697     {
 698         *ppszFileName = CoTaskMemAlloc((strlenW(This->pszFileName) + 1) * sizeof(WCHAR));
 699         strcpyW(*ppszFileName, This->pszFileName);
 700     }
 701     else
 702         *ppszFileName = NULL;
 703
 704     if (pmt)
 705     {
 706         if (This->pmt)
 707             CopyMediaType(pmt, This->pmt);
 708         else
 709             ZeroMemory(pmt, sizeof(*pmt));
 710     }
 711
 712     return S_OK;
 713 }
 714
 715 static const IFileSourceFilterVtbl FileSource_Vtbl =
 716 {
 717     FileSource_QueryInterface,
 718     FileSource_AddRef,
 719     FileSource_Release,
 720     FileSource_Load,
 721     FileSource_GetCurFile
 722 };
 723
 724
 725 /* the dwUserData passed back to user */
 726 typedef struct DATAREQUEST
 727 {
 728     IMediaSample * pSample; /* sample passed to us by user */
 729     DWORD_PTR dwUserData; /* user data passed to us */
 730     OVERLAPPED ovl; /* our overlapped structure */
 731
 732     struct DATAREQUEST * pNext; /* next data request in list */
 733 } DATAREQUEST;
 734
 735 static void queue(DATAREQUEST * pHead, DATAREQUEST * pItem)
 736 {
 737     DATAREQUEST * pCurrent;
 738     for (pCurrent = pHead; pCurrent->pNext; pCurrent = pCurrent->pNext)
 739         ;
 740     pCurrent->pNext = pItem;
 741 }
 742
 743 typedef struct FileAsyncReader
 744 {
 745     OutputPin pin;
 746     const struct IAsyncReaderVtbl * lpVtblAR;
 747
 748     HANDLE hFile;
 749     HANDLE hEvent;
 750     BOOL bFlushing;
 751     DATAREQUEST * pHead; /* head of data request list */
 752     CRITICAL_SECTION csList; /* critical section to protect operations on list */
 753 } FileAsyncReader;
 754
 755 static inline FileAsyncReader *impl_from_IAsyncReader( IAsyncReader *iface )
 756 {
 757     return (FileAsyncReader *)((char*)iface - FIELD_OFFSET(FileAsyncReader, lpVtblAR));
 758 }
 759
 760 static HRESULT AcceptProcAFR(LPVOID iface, const AM_MEDIA_TYPE *pmt)
 761 {
 762     AsyncReader *This = (AsyncReader *)iface;
 763
 764     FIXME("(%p, %p)\n", iface, pmt);
 765
 766     if (IsEqualGUID(&pmt->majortype, &This->pmt->majortype) &&
 767         IsEqualGUID(&pmt->subtype, &This->pmt->subtype) &&
 768         IsEqualGUID(&pmt->formattype, &FORMAT_None))
 769         return S_OK;
 770
 771     return S_FALSE;
 772 }
 773
 774 /* overriden pin functions */
 775
 776 static HRESULT WINAPI FileAsyncReaderPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 777 {
 778     FileAsyncReader *This = (FileAsyncReader *)iface;
 779     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 780
 781     *ppv = NULL;
 782
 783     if (IsEqualIID(riid, &IID_IUnknown))
 784         *ppv = (LPVOID)This;
 785     else if (IsEqualIID(riid, &IID_IPin))
 786         *ppv = (LPVOID)This;
 787     else if (IsEqualIID(riid, &IID_IAsyncReader))
 788         *ppv = (LPVOID)&This->lpVtblAR;
 789
 790     if (*ppv)
 791     {
 792         IUnknown_AddRef((IUnknown *)(*ppv));
 793         return S_OK;
 794     }
 795
 796     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IMediaSeeking))
 797         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 798
 799     return E_NOINTERFACE;
 800 }
 801
 802 static ULONG WINAPI FileAsyncReaderPin_Release(IPin * iface)
 803 {
 804     FileAsyncReader *This = (FileAsyncReader *)iface;
 805     ULONG refCount = InterlockedDecrement(&This->pin.pin.refCount);
 806
 807     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 808
 809     if (!refCount)
 810     {
 811         DATAREQUEST * pCurrent;
 812         DATAREQUEST * pNext;
 813         for (pCurrent = This->pHead; pCurrent; pCurrent = pNext)
 814         {
 815             pNext = pCurrent->pNext;
 816             CoTaskMemFree(pCurrent);
 817         }
 818         CloseHandle(This->hFile);
 819         CloseHandle(This->hEvent);
 820         This->csList.DebugInfo->Spare[0] = 0;
 821         DeleteCriticalSection(&This->csList);
 822         CoTaskMemFree(This);
 823         return 0;
 824     }
 825     return refCount;
 826 }
 827
 828 static HRESULT WINAPI FileAsyncReaderPin_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum)
 829 {
 830     ENUMMEDIADETAILS emd;
 831     FileAsyncReader *This = (FileAsyncReader *)iface;
 832
 833     TRACE("(%p)\n", ppEnum);
 834
 835     emd.cMediaTypes = 1;
 836     emd.pMediaTypes = ((AsyncReader *)This->pin.pin.pinInfo.pFilter)->pmt;
 837
 838     return IEnumMediaTypesImpl_Construct(&emd, ppEnum);
 839 }
 840
 841 static const IPinVtbl FileAsyncReaderPin_Vtbl =
 842 {
 843     FileAsyncReaderPin_QueryInterface,
 844     IPinImpl_AddRef,
 845     FileAsyncReaderPin_Release,
 846     OutputPin_Connect,
 847     OutputPin_ReceiveConnection,
 848     IPinImpl_Disconnect,
 849     IPinImpl_ConnectedTo,
 850     IPinImpl_ConnectionMediaType,
 851     IPinImpl_QueryPinInfo,
 852     IPinImpl_QueryDirection,
 853     IPinImpl_QueryId,
 854     IPinImpl_QueryAccept,
 855     FileAsyncReaderPin_EnumMediaTypes,
 856     IPinImpl_QueryInternalConnections,
 857     OutputPin_EndOfStream,
 858     OutputPin_BeginFlush,
 859     OutputPin_EndFlush,
 860     OutputPin_NewSegment
 861 };
 862
 863 /* Function called as a helper to IPin_Connect */
 864 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 865 /* this differs from standard OutputPin_ConnectSpecific only in that it
 866  * doesn't need the IMemInputPin interface on the receiving pin */
 867 static HRESULT FileAsyncReaderPin_ConnectSpecific(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 868 {
 869     OutputPin *This = (OutputPin *)iface;
 870     HRESULT hr;
 871
 872     TRACE("(%p, %p)\n", pReceivePin, pmt);
 873     dump_AM_MEDIA_TYPE(pmt);
 874
 875     /* FIXME: call queryacceptproc */
 876
 877     This->pin.pConnectedTo = pReceivePin;
 878     IPin_AddRef(pReceivePin);
 879     CopyMediaType(&This->pin.mtCurrent, pmt);
 880
 881     hr = IPin_ReceiveConnection(pReceivePin, iface, pmt);
 882
 883     if (FAILED(hr))
 884     {
 885         IPin_Release(This->pin.pConnectedTo);
 886         This->pin.pConnectedTo = NULL;
 887         FreeMediaType(&This->pin.mtCurrent);
 888     }
 889
 890     TRACE(" -- %x\n", hr);
 891     return hr;
 892 }
 893
 894 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 895 {
 896     PIN_INFO piOutput;
 897     HRESULT hr;
 898
 899     *ppPin = NULL;
 900     piOutput.dir = PINDIR_OUTPUT;
 901     piOutput.pFilter = pBaseFilter;
 902     strcpyW(piOutput.achName, wszOutputPinName);
 903     hr = OutputPin_Construct(&FileAsyncReaderPin_Vtbl, sizeof(FileAsyncReader), &piOutput, NULL, pBaseFilter, AcceptProcAFR, pCritSec, ppPin);
 904
 905     if (SUCCEEDED(hr))
 906     {
 907         FileAsyncReader *pPinImpl =  (FileAsyncReader *)*ppPin;
 908         pPinImpl->lpVtblAR = &FileAsyncReader_Vtbl;
 909         pPinImpl->hFile = hFile;
 910         pPinImpl->hEvent = CreateEventW(NULL, 0, 0, NULL);
 911         pPinImpl->bFlushing = FALSE;
 912         pPinImpl->pHead = NULL;
 913         pPinImpl->pin.pConnectSpecific = FileAsyncReaderPin_ConnectSpecific;
 914         InitializeCriticalSection(&pPinImpl->csList);
 915         pPinImpl->csList.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FileAsyncReader.csList");
 916     }
 917     return hr;
 918 }
 919
 920 /* IAsyncReader */
 921
 922 static HRESULT WINAPI FileAsyncReader_QueryInterface(IAsyncReader * iface, REFIID riid, LPVOID * ppv)
 923 {
 924     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 925
 926     return IPin_QueryInterface((IPin *)This, riid, ppv);
 927 }
 928
 929 static ULONG WINAPI FileAsyncReader_AddRef(IAsyncReader * iface)
 930 {
 931     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 932
 933     return IPin_AddRef((IPin *)This);
 934 }
 935
 936 static ULONG WINAPI FileAsyncReader_Release(IAsyncReader * iface)
 937 {
 938     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 939
 940     return IPin_Release((IPin *)This);
 941 }
 942
 943 #define DEF_ALIGNMENT 1
 944
 945 static HRESULT WINAPI FileAsyncReader_RequestAllocator(IAsyncReader * iface, IMemAllocator * pPreferred, ALLOCATOR_PROPERTIES * pProps, IMemAllocator ** ppActual)
 946 {
 947     HRESULT hr = S_OK;
 948
 949     TRACE("(%p, %p, %p)\n", pPreferred, pProps, ppActual);
 950
 951     if (!pProps->cbAlign || (pProps->cbAlign % DEF_ALIGNMENT) != 0)
 952         pProps->cbAlign = DEF_ALIGNMENT;
 953
 954     if (pPreferred)
 955     {
 956         ALLOCATOR_PROPERTIES PropsActual;
 957         hr = IMemAllocator_SetProperties(pPreferred, pProps, &PropsActual);
 958         /* FIXME: check we are still aligned */
 959         if (SUCCEEDED(hr))
 960         {
 961             IMemAllocator_AddRef(pPreferred);
 962             *ppActual = pPreferred;
 963             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 964             return S_OK;
 965         }
 966     }
 967
 968     pPreferred = NULL;
 969
 970     hr = CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC, &IID_IMemAllocator, (LPVOID *)&pPreferred);
 971
 972     if (SUCCEEDED(hr))
 973     {
 974         ALLOCATOR_PROPERTIES PropsActual;
 975         hr = IMemAllocator_SetProperties(pPreferred, pProps, &PropsActual);
 976         /* FIXME: check we are still aligned */
 977         if (SUCCEEDED(hr))
 978         {
 979             *ppActual = pPreferred;
 980             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 981             return S_OK;
 982         }
 983     }
 984
 985     if (FAILED(hr))
 986     {
 987         *ppActual = NULL;
 988         if (pPreferred)
 989             IMemAllocator_Release(pPreferred);
 990     }
 991
 992     TRACE("-- %x\n", hr);
 993     return hr;
 994 }
 995
 996 /* we could improve the Request/WaitForNext mechanism by allowing out of order samples.
 997  * however, this would be quite complicated to do and may be a bit error prone */
 998 static HRESULT WINAPI FileAsyncReader_Request(IAsyncReader * iface, IMediaSample * pSample, DWORD_PTR dwUser)
 999 {
1000     REFERENCE_TIME Start;
1001     REFERENCE_TIME Stop;
1002     DATAREQUEST * pDataRq;
1003     BYTE * pBuffer;
1004     HRESULT hr = S_OK;
1005     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1006
1007     TRACE("(%p, %lx)\n", pSample, dwUser);
1008
1009     /* check flushing state */
1010     if (This->bFlushing)
1011         return VFW_E_WRONG_STATE;
1012
1013     if (!(pDataRq = CoTaskMemAlloc(sizeof(*pDataRq))))
1014         hr = E_OUTOFMEMORY;
1015
1016     /* get start and stop positions in bytes */
1017     if (SUCCEEDED(hr))
1018         hr = IMediaSample_GetTime(pSample, &Start, &Stop);
1019
1020     if (SUCCEEDED(hr))
1021         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1022
1023     if (SUCCEEDED(hr))
1024     {
1025         DWORD dwLength = (DWORD) BYTES_FROM_MEDIATIME(Stop - Start);
1026
1027         pDataRq->ovl.u.s.Offset = (DWORD) BYTES_FROM_MEDIATIME(Start);
1028         pDataRq->ovl.u.s.OffsetHigh = (DWORD)(BYTES_FROM_MEDIATIME(Start) >> (sizeof(DWORD) * 8));
1029         pDataRq->ovl.hEvent = This->hEvent;
1030         pDataRq->dwUserData = dwUser;
1031         pDataRq->pNext = NULL;
1032         /* we violate traditional COM rules here by maintaining
1033          * a reference to the sample, but not calling AddRef, but
1034          * that's what MSDN says to do */
1035         pDataRq->pSample = pSample;
1036
1037         EnterCriticalSection(&This->csList);
1038         {
1039             if (This->pHead)
1040                 /* adds data request to end of list */
1041                 queue(This->pHead, pDataRq);
1042             else
1043                 This->pHead = pDataRq;
1044         }
1045         LeaveCriticalSection(&This->csList);
1046
1047         /* this is definitely not how it is implemented on Win9x
1048          * as they do not support async reads on files, but it is
1049          * sooo much easier to use this than messing around with threads!
1050          */
1051         if (!ReadFile(This->hFile, pBuffer, dwLength, NULL, &pDataRq->ovl))
1052             hr = HRESULT_FROM_WIN32(GetLastError());
1053
1054         /* ERROR_IO_PENDING is not actually an error since this is what we want! */
1055         if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1056             hr = S_OK;
1057     }
1058
1059     if (FAILED(hr) && pDataRq)
1060     {
1061         EnterCriticalSection(&This->csList);
1062         {
1063             DATAREQUEST * pCurrent;
1064             for (pCurrent = This->pHead; pCurrent && pCurrent->pNext; pCurrent = pCurrent->pNext)
1065                 if (pCurrent->pNext == pDataRq)
1066                 {
1067                     pCurrent->pNext = pDataRq->pNext;
1068                     break;
1069                 }
1070         }
1071         LeaveCriticalSection(&This->csList);
1072         CoTaskMemFree(pDataRq);
1073     }
1074
1075     TRACE("-- %x\n", hr);
1076     return hr;
1077 }
1078
1079 static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dwTimeout, IMediaSample ** ppSample, DWORD_PTR * pdwUser)
1080 {
1081     HRESULT hr = S_OK;
1082     DWORD dwBytes = 0;
1083     DATAREQUEST * pDataRq = NULL;
1084     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1085
1086     TRACE("(%u, %p, %p)\n", dwTimeout, ppSample, pdwUser);
1087
1088     /* FIXME: we could do with improving this by waiting for an array of event handles
1089      * and then determining which one finished and removing that from the list, otherwise
1090      * we will end up waiting for longer than we should do, if a later request finishes
1091      * before an earlier one */
1092
1093     *ppSample = NULL;
1094     *pdwUser = 0;
1095
1096     /* we return immediately if flushing */
1097     if (This->bFlushing)
1098         hr = VFW_E_WRONG_STATE;
1099
1100     if (SUCCEEDED(hr))
1101     {
1102         /* wait for the read to finish or timeout */
1103         if (WaitForSingleObject(This->hEvent, dwTimeout) == WAIT_TIMEOUT)
1104             hr = VFW_E_TIMEOUT;
1105     }
1106     if (SUCCEEDED(hr))
1107     {
1108         EnterCriticalSection(&This->csList);
1109         {
1110             pDataRq = This->pHead;
1111             if (pDataRq == NULL)
1112                 hr = E_FAIL;
1113             else
1114                 This->pHead = pDataRq->pNext;
1115         }
1116         LeaveCriticalSection(&This->csList);
1117     }
1118
1119     if (SUCCEEDED(hr))
1120     {
1121         /* get any errors */
1122         if (!GetOverlappedResult(This->hFile, &pDataRq->ovl, &dwBytes, FALSE))
1123             hr = HRESULT_FROM_WIN32(GetLastError());
1124     }
1125
1126     if (SUCCEEDED(hr))
1127     {
1128         IMediaSample_SetActualDataLength(pDataRq->pSample, dwBytes);
1129         *ppSample = pDataRq->pSample;
1130         *pdwUser = pDataRq->dwUserData;
1131     }
1132
1133     /* no need to close event handle since we will close it when the pin is destroyed */
1134     CoTaskMemFree(pDataRq);
1135
1136     TRACE("-- %x\n", hr);
1137     return hr;
1138 }
1139
1140 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer);
1141
1142 static HRESULT WINAPI FileAsyncReader_SyncReadAligned(IAsyncReader * iface, IMediaSample * pSample)
1143 {
1144     BYTE * pBuffer;
1145     REFERENCE_TIME tStart;
1146     REFERENCE_TIME tStop;
1147     HRESULT hr;
1148
1149     TRACE("(%p)\n", pSample);
1150
1151     hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
1152
1153     if (SUCCEEDED(hr))
1154         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1155
1156     if (SUCCEEDED(hr))
1157         hr = FileAsyncReader_SyncRead(iface,
1158             BYTES_FROM_MEDIATIME(tStart),
1159             (LONG) BYTES_FROM_MEDIATIME(tStop - tStart),
1160             pBuffer);
1161
1162     TRACE("-- %x\n", hr);
1163     return hr;
1164 }
1165
1166 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer)
1167 {
1168     OVERLAPPED ovl;
1169     HRESULT hr = S_OK;
1170     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1171
1172     TRACE("(%x%08x, %d, %p)\n", (ULONG)(llPosition >> 32), (ULONG)llPosition, lLength, pBuffer);
1173
1174     ZeroMemory(&ovl, sizeof(ovl));
1175
1176     ovl.hEvent = CreateEventW(NULL, 0, 0, NULL);
1177     /* NOTE: llPosition is the actual byte position to start reading from */
1178     ovl.u.s.Offset = (DWORD) llPosition;
1179     ovl.u.s.OffsetHigh = (DWORD) (llPosition >> (sizeof(DWORD) * 8));
1180
1181     if (!ReadFile(This->hFile, pBuffer, lLength, NULL, &ovl))
1182         hr = HRESULT_FROM_WIN32(GetLastError());
1183
1184     if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1185         hr = S_OK;
1186
1187     if (SUCCEEDED(hr))
1188     {
1189         DWORD dwBytesRead;
1190
1191         if (!GetOverlappedResult(This->hFile, &ovl, &dwBytesRead, TRUE))
1192             hr = HRESULT_FROM_WIN32(GetLastError());
1193     }
1194
1195     CloseHandle(ovl.hEvent);
1196
1197     TRACE("-- %x\n", hr);
1198     return hr;
1199 }
1200
1201 static HRESULT WINAPI FileAsyncReader_Length(IAsyncReader * iface, LONGLONG * pTotal, LONGLONG * pAvailable)
1202 {
1203     DWORD dwSizeLow;
1204     DWORD dwSizeHigh;
1205     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1206
1207     TRACE("(%p, %p)\n", pTotal, pAvailable);
1208
1209     if (((dwSizeLow = GetFileSize(This->hFile, &dwSizeHigh)) == -1) &&
1210         (GetLastError() != NO_ERROR))
1211         return HRESULT_FROM_WIN32(GetLastError());
1212
1213     *pTotal = (LONGLONG)dwSizeLow | (LONGLONG)dwSizeHigh << (sizeof(DWORD) * 8);
1214
1215     *pAvailable = *pTotal;
1216
1217     return S_OK;
1218 }
1219
1220 static HRESULT WINAPI FileAsyncReader_BeginFlush(IAsyncReader * iface)
1221 {
1222     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1223
1224     TRACE("()\n");
1225
1226     This->bFlushing = TRUE;
1227     CancelIo(This->hFile);
1228     SetEvent(This->hEvent);
1229
1230     /* FIXME: free list */
1231
1232     return S_OK;
1233 }
1234
1235 static HRESULT WINAPI FileAsyncReader_EndFlush(IAsyncReader * iface)
1236 {
1237     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1238
1239     TRACE("()\n");
1240
1241     This->bFlushing = FALSE;
1242
1243     return S_OK;
1244 }
1245
1246 static const IAsyncReaderVtbl FileAsyncReader_Vtbl =
1247 {
1248     FileAsyncReader_QueryInterface,
1249     FileAsyncReader_AddRef,
1250     FileAsyncReader_Release,
1251     FileAsyncReader_RequestAllocator,
1252     FileAsyncReader_Request,
1253     FileAsyncReader_WaitForNext,
1254     FileAsyncReader_SyncReadAligned,
1255     FileAsyncReader_SyncRead,
1256     FileAsyncReader_Length,
1257     FileAsyncReader_BeginFlush,
1258     FileAsyncReader_EndFlush,
1259 };