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     BaseFilter filter;
  43     const IFileSourceFilterVtbl * lpVtblFSF;
  44
  45     IPin * pOutputPin;
  46     LPOLESTR pszFileName;
  47     AM_MEDIA_TYPE * pmt;
  48 } AsyncReader;
  49
  50 static const IBaseFilterVtbl AsyncReader_Vtbl;
  51 static const IFileSourceFilterVtbl FileSource_Vtbl;
  52 static const IAsyncReaderVtbl FileAsyncReader_Vtbl;
  53
  54 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
  55
  56 static inline AsyncReader *impl_from_IFileSourceFilter( IFileSourceFilter *iface )
  57 {
  58     return (AsyncReader *)((char*)iface - FIELD_OFFSET(AsyncReader, lpVtblFSF));
  59 }
  60
  61 static WCHAR const mediatype_name[11] = {
  62     'M', 'e', 'd', 'i', 'a', ' ', 'T', 'y', 'p', 'e', 0 };
  63 static WCHAR const subtype_name[8] = {
  64     'S', 'u', 'b', 't', 'y', 'p', 'e', 0 };
  65
  66 static HRESULT process_extensions(HKEY hkeyExtensions, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType)
  67 {
  68     WCHAR *extension;
  69     LONG l;
  70     HKEY hsub;
  71     WCHAR keying[39];
  72     DWORD size;
  73
  74     if (!pszFileName)
  75         return E_POINTER;
  76
  77     /* Get the part of the name that matters */
  78     extension = PathFindExtensionW(pszFileName);
  79     if (*extension != '.')
  80         return E_FAIL;
  81
  82     l = RegOpenKeyExW(hkeyExtensions, extension, 0, KEY_READ, &hsub);
  83     if (l)
  84         return E_FAIL;
  85
  86     size = sizeof(keying);
  87     l = RegQueryValueExW(hsub, mediatype_name, NULL, NULL, (LPBYTE)keying, &size);
  88     if (!l)
  89         CLSIDFromString(keying, majorType);
  90
  91     size = sizeof(keying);
  92     if (!l)
  93         l = RegQueryValueExW(hsub, subtype_name, NULL, NULL, (LPBYTE)keying, &size);
  94
  95     if (!l)
  96         CLSIDFromString(keying, minorType);
  97
  98     RegCloseKey(hsub);
  99
 100     if (!l)
 101         return S_OK;
 102     return E_FAIL;
 103 }
 104
 105 static unsigned char byte_from_hex_char(WCHAR wHex)
 106 {
 107     switch (tolowerW(wHex))
 108     {
 109     case '0':
 110     case '1':
 111     case '2':
 112     case '3':
 113     case '4':
 114     case '5':
 115     case '6':
 116     case '7':
 117     case '8':
 118     case '9':
 119         return (wHex - '0') & 0xf;
 120     case 'a':
 121     case 'b':
 122     case 'c':
 123     case 'd':
 124     case 'e':
 125     case 'f':
 126         return (wHex - 'a' + 10) & 0xf;
 127     default:
 128         return 0;
 129     }
 130 }
 131
 132 static HRESULT process_pattern_string(LPCWSTR wszPatternString, IAsyncReader * pReader)
 133 {
 134     ULONG ulOffset;
 135     ULONG ulBytes;
 136     BYTE * pbMask;
 137     BYTE * pbValue;
 138     BYTE * pbFile;
 139     HRESULT hr = S_OK;
 140     ULONG strpos;
 141
 142     TRACE("\t\tPattern string: %s\n", debugstr_w(wszPatternString));
 143
 144     /* format: "offset, bytestocompare, mask, value" */
 145
 146     ulOffset = strtolW(wszPatternString, NULL, 10);
 147
 148     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 149         return E_INVALIDARG;
 150
 151     wszPatternString++; /* skip ',' */
 152
 153     ulBytes = strtolW(wszPatternString, NULL, 10);
 154
 155     pbMask = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 156     pbValue = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, ulBytes);
 157     pbFile = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 158
 159     /* default mask is match everything */
 160     memset(pbMask, 0xFF, ulBytes);
 161
 162     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 163         hr = E_INVALIDARG;
 164
 165     if (hr == S_OK)
 166     {
 167         wszPatternString++; /* skip ',' */
 168         while (!isxdigitW(*wszPatternString) && (*wszPatternString != ',')) wszPatternString++;
 169
 170         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 171         {
 172             if ((strpos % 2) == 1) /* odd numbered position */
 173                 pbMask[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 174             else
 175                 pbMask[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 176         }
 177
 178         if (!(wszPatternString = strchrW(wszPatternString, ',')))
 179             hr = E_INVALIDARG;
 180
 181         wszPatternString++; /* skip ',' */
 182     }
 183
 184     if (hr == S_OK)
 185     {
 186         for ( ; !isxdigitW(*wszPatternString) && (*wszPatternString != ','); wszPatternString++)
 187             ;
 188
 189         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 190         {
 191             if ((strpos % 2) == 1) /* odd numbered position */
 192                 pbValue[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 193             else
 194                 pbValue[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 195         }
 196     }
 197
 198     if (hr == S_OK)
 199         hr = IAsyncReader_SyncRead(pReader, ulOffset, ulBytes, pbFile);
 200
 201     if (hr == S_OK)
 202     {
 203         ULONG i;
 204         for (i = 0; i < ulBytes; i++)
 205             if ((pbFile[i] & pbMask[i]) != pbValue[i])
 206             {
 207                 hr = S_FALSE;
 208                 break;
 209             }
 210     }
 211
 212     HeapFree(GetProcessHeap(), 0, pbMask);
 213     HeapFree(GetProcessHeap(), 0, pbValue);
 214     HeapFree(GetProcessHeap(), 0, pbFile);
 215
 216     /* if we encountered no errors with this string, and there is a following tuple, then we
 217      * have to match that as well to succeed */
 218     if ((hr == S_OK) && (wszPatternString = strchrW(wszPatternString, ',')))
 219         return process_pattern_string(wszPatternString + 1, pReader);
 220     else
 221         return hr;
 222 }
 223
 224 static HRESULT GetClassMediaFile(IAsyncReader * pReader, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType)
 225 {
 226     HKEY hkeyMediaType = NULL;
 227     LONG lRet;
 228     HRESULT hr = S_OK;
 229     BOOL bFound = FALSE;
 230     static const WCHAR wszMediaType[] = {'M','e','d','i','a',' ','T','y','p','e',0};
 231
 232     TRACE("(%p, %s, %p, %p)\n", pReader, debugstr_w(pszFileName), majorType, minorType);
 233
 234     *majorType = GUID_NULL;
 235     *minorType = GUID_NULL;
 236
 237     lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszMediaType, 0, KEY_READ, &hkeyMediaType);
 238     hr = HRESULT_FROM_WIN32(lRet);
 239
 240     if (SUCCEEDED(hr))
 241     {
 242         DWORD indexMajor;
 243
 244         for (indexMajor = 0; !bFound; indexMajor++)
 245         {
 246             HKEY hkeyMajor;
 247             WCHAR wszMajorKeyName[CHARS_IN_GUID];
 248             DWORD dwKeyNameLength = sizeof(wszMajorKeyName) / sizeof(wszMajorKeyName[0]);
 249             static const WCHAR wszExtensions[] = {'E','x','t','e','n','s','i','o','n','s',0};
 250
 251             if (RegEnumKeyExW(hkeyMediaType, indexMajor, wszMajorKeyName, &dwKeyNameLength, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 252                 break;
 253             if (RegOpenKeyExW(hkeyMediaType, wszMajorKeyName, 0, KEY_READ, &hkeyMajor) != ERROR_SUCCESS)
 254                 break;
 255             TRACE("%s\n", debugstr_w(wszMajorKeyName));
 256             if (!strcmpW(wszExtensions, wszMajorKeyName))
 257             {
 258                 if (process_extensions(hkeyMajor, pszFileName, majorType, minorType) == S_OK)
 259                     bFound = TRUE;
 260             }
 261             else
 262             {
 263                 DWORD indexMinor;
 264
 265                 for (indexMinor = 0; !bFound; indexMinor++)
 266                 {
 267                     HKEY hkeyMinor;
 268                     WCHAR wszMinorKeyName[CHARS_IN_GUID];
 269                     DWORD dwMinorKeyNameLen = sizeof(wszMinorKeyName) / sizeof(wszMinorKeyName[0]);
 270                     DWORD maxValueLen;
 271                     DWORD indexValue;
 272
 273                     if (RegEnumKeyExW(hkeyMajor, indexMinor, wszMinorKeyName, &dwMinorKeyNameLen, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 274                         break;
 275
 276                     if (RegOpenKeyExW(hkeyMajor, wszMinorKeyName, 0, KEY_READ, &hkeyMinor) != ERROR_SUCCESS)
 277                         break;
 278
 279                     TRACE("\t%s\n", debugstr_w(wszMinorKeyName));
 280
 281                     if (RegQueryInfoKeyW(hkeyMinor, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &maxValueLen, NULL, NULL) != ERROR_SUCCESS)
 282                         break;
 283
 284                     for (indexValue = 0; !bFound; indexValue++)
 285                     {
 286                         DWORD dwType;
 287                         WCHAR wszValueName[14]; /* longest name we should encounter will be "Source Filter" */
 288                         LPWSTR wszPatternString = HeapAlloc(GetProcessHeap(), 0, maxValueLen);
 289                         DWORD dwValueNameLen = sizeof(wszValueName) / sizeof(wszValueName[0]); /* remember this is in chars */
 290                         DWORD dwDataLen = maxValueLen; /* remember this is in bytes */
 291                         static const WCHAR wszSourceFilter[] = {'S','o','u','r','c','e',' ','F','i','l','t','e','r',0};
 292                         LONG temp;
 293
 294                         if ((temp = RegEnumValueW(hkeyMinor, indexValue, wszValueName, &dwValueNameLen, NULL, &dwType, (LPBYTE)wszPatternString, &dwDataLen)) != ERROR_SUCCESS)
 295                         {
 296                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 297                             break;
 298                         }
 299
 300                         /* if it is not the source filter value */
 301                         if (strcmpW(wszValueName, wszSourceFilter))
 302                         {
 303                             if (process_pattern_string(wszPatternString, pReader) == S_OK)
 304                             {
 305                                 if (SUCCEEDED(CLSIDFromString(wszMajorKeyName, majorType)) &&
 306                                     SUCCEEDED(CLSIDFromString(wszMinorKeyName, minorType)))
 307                                     bFound = TRUE;
 308                             }
 309                         }
 310                         HeapFree(GetProcessHeap(), 0, wszPatternString);
 311                     }
 312                     CloseHandle(hkeyMinor);
 313                 }
 314             }
 315             CloseHandle(hkeyMajor);
 316         }
 317     }
 318     CloseHandle(hkeyMediaType);
 319
 320     if (SUCCEEDED(hr) && !bFound)
 321     {
 322         ERR("Media class not found\n");
 323         hr = E_FAIL;
 324     }
 325     else if (bFound)
 326         TRACE("Found file's class: major = %s, subtype = %s\n", qzdebugstr_guid(majorType), qzdebugstr_guid(minorType));
 327
 328     return hr;
 329 }
 330
 331 static IPin* WINAPI AsyncReader_GetPin(BaseFilter *iface, int pos)
 332 {
 333     AsyncReader *This = (AsyncReader *)iface;
 334
 335     if (pos >= 1 || !This->pOutputPin)
 336         return NULL;
 337
 338     IPin_AddRef(This->pOutputPin);
 339     return This->pOutputPin;
 340 }
 341
 342 static LONG WINAPI AsyncReader_GetPinCount(BaseFilter *iface)
 343 {
 344     AsyncReader *This = (AsyncReader *)iface;
 345
 346     if (!This->pOutputPin)
 347         return 0;
 348     else
 349         return 1;
 350 }
 351
 352 static const BaseFilterFuncTable BaseFuncTable = {
 353     AsyncReader_GetPin,
 354     AsyncReader_GetPinCount
 355 };
 356
 357 HRESULT AsyncReader_create(IUnknown * pUnkOuter, LPVOID * ppv)
 358 {
 359     AsyncReader *pAsyncRead;
 360
 361     if( pUnkOuter )
 362         return CLASS_E_NOAGGREGATION;
 363
 364     pAsyncRead = CoTaskMemAlloc(sizeof(AsyncReader));
 365
 366     if (!pAsyncRead)
 367         return E_OUTOFMEMORY;
 368
 369     BaseFilter_Init(&pAsyncRead->filter, &AsyncReader_Vtbl, &CLSID_AsyncReader, (DWORD_PTR)(__FILE__ ": AsyncReader.csFilter"), &BaseFuncTable);
 370
 371     pAsyncRead->lpVtblFSF = &FileSource_Vtbl;
 372     pAsyncRead->pOutputPin = NULL;
 373
 374     pAsyncRead->pszFileName = NULL;
 375     pAsyncRead->pmt = NULL;
 376
 377     *ppv = pAsyncRead;
 378
 379     TRACE("-- created at %p\n", pAsyncRead);
 380
 381     return S_OK;
 382 }
 383
 384 /** IUnknown methods **/
 385
 386 static HRESULT WINAPI AsyncReader_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
 387 {
 388     AsyncReader *This = (AsyncReader *)iface;
 389
 390     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 391
 392     *ppv = NULL;
 393
 394     if (IsEqualIID(riid, &IID_IUnknown))
 395         *ppv = This;
 396     else if (IsEqualIID(riid, &IID_IPersist))
 397         *ppv = This;
 398     else if (IsEqualIID(riid, &IID_IMediaFilter))
 399         *ppv = This;
 400     else if (IsEqualIID(riid, &IID_IBaseFilter))
 401         *ppv = This;
 402     else if (IsEqualIID(riid, &IID_IFileSourceFilter))
 403         *ppv = &This->lpVtblFSF;
 404
 405     if (*ppv)
 406     {
 407         IUnknown_AddRef((IUnknown *)(*ppv));
 408         return S_OK;
 409     }
 410
 411     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IMediaSeeking) &&
 412         !IsEqualIID(riid, &IID_IVideoWindow) && !IsEqualIID(riid, &IID_IBasicAudio))
 413         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 414
 415     return E_NOINTERFACE;
 416 }
 417
 418 static ULONG WINAPI AsyncReader_Release(IBaseFilter * iface)
 419 {
 420     AsyncReader *This = (AsyncReader *)iface;
 421     ULONG refCount = BaseFilterImpl_Release(iface);
 422
 423     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 424
 425     if (!refCount)
 426     {
 427         if (This->pOutputPin)
 428         {
 429             IPin *pConnectedTo;
 430             if(SUCCEEDED(IPin_ConnectedTo(This->pOutputPin, &pConnectedTo)))
 431             {
 432                 IPin_Disconnect(pConnectedTo);
 433                 IPin_Release(pConnectedTo);
 434             }
 435             IPin_Disconnect(This->pOutputPin);
 436             IPin_Release(This->pOutputPin);
 437         }
 438         CoTaskMemFree(This->pszFileName);
 439         if (This->pmt)
 440             FreeMediaType(This->pmt);
 441         CoTaskMemFree(This);
 442         return 0;
 443     }
 444     else
 445         return refCount;
 446 }
 447
 448 /** IMediaFilter methods **/
 449
 450 static HRESULT WINAPI AsyncReader_Stop(IBaseFilter * iface)
 451 {
 452     AsyncReader *This = (AsyncReader *)iface;
 453
 454     TRACE("()\n");
 455
 456     This->filter.state = State_Stopped;
 457
 458     return S_OK;
 459 }
 460
 461 static HRESULT WINAPI AsyncReader_Pause(IBaseFilter * iface)
 462 {
 463     AsyncReader *This = (AsyncReader *)iface;
 464
 465     TRACE("()\n");
 466
 467     This->filter.state = State_Paused;
 468
 469     return S_OK;
 470 }
 471
 472 static HRESULT WINAPI AsyncReader_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
 473 {
 474     AsyncReader *This = (AsyncReader *)iface;
 475
 476     TRACE("(%x%08x)\n", (ULONG)(tStart >> 32), (ULONG)tStart);
 477
 478     This->filter.state = State_Running;
 479
 480     return S_OK;
 481 }
 482
 483 /** IBaseFilter methods **/
 484
 485 static HRESULT WINAPI AsyncReader_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
 486 {
 487     FIXME("(%s, %p)\n", debugstr_w(Id), ppPin);
 488
 489     return E_NOTIMPL;
 490 }
 491
 492 static const IBaseFilterVtbl AsyncReader_Vtbl =
 493 {
 494     AsyncReader_QueryInterface,
 495     BaseFilterImpl_AddRef,
 496     AsyncReader_Release,
 497     BaseFilterImpl_GetClassID,
 498     AsyncReader_Stop,
 499     AsyncReader_Pause,
 500     AsyncReader_Run,
 501     BaseFilterImpl_GetState,
 502     BaseFilterImpl_SetSyncSource,
 503     BaseFilterImpl_GetSyncSource,
 504     BaseFilterImpl_EnumPins,
 505     AsyncReader_FindPin,
 506     BaseFilterImpl_QueryFilterInfo,
 507     BaseFilterImpl_JoinFilterGraph,
 508     BaseFilterImpl_QueryVendorInfo
 509 };
 510
 511 static HRESULT WINAPI FileSource_QueryInterface(IFileSourceFilter * iface, REFIID riid, LPVOID * ppv)
 512 {
 513     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 514
 515     return IBaseFilter_QueryInterface((IFileSourceFilter*)&This->filter.lpVtbl, riid, ppv);
 516 }
 517
 518 static ULONG WINAPI FileSource_AddRef(IFileSourceFilter * iface)
 519 {
 520     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 521
 522     return IBaseFilter_AddRef((IFileSourceFilter*)&This->filter.lpVtbl);
 523 }
 524
 525 static ULONG WINAPI FileSource_Release(IFileSourceFilter * iface)
 526 {
 527     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 528
 529     return IBaseFilter_Release((IFileSourceFilter*)&This->filter.lpVtbl);
 530 }
 531
 532 static HRESULT WINAPI FileSource_Load(IFileSourceFilter * iface, LPCOLESTR pszFileName, const AM_MEDIA_TYPE * pmt)
 533 {
 534     HRESULT hr;
 535     HANDLE hFile;
 536     IAsyncReader * pReader = NULL;
 537     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 538
 539     TRACE("(%s, %p)\n", debugstr_w(pszFileName), pmt);
 540
 541     /* open file */
 542     /* FIXME: check the sharing values that native uses */
 543     hFile = CreateFileW(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
 544
 545     if (hFile == INVALID_HANDLE_VALUE)
 546     {
 547         return HRESULT_FROM_WIN32(GetLastError());
 548     }
 549
 550     /* create pin */
 551     hr = FileAsyncReader_Construct(hFile, (IBaseFilter *)&This->filter.lpVtbl, &This->filter.csFilter, &This->pOutputPin);
 552     BaseFilterImpl_IncrementPinVersion((BaseFilter *)&This->filter.lpVtbl);
 553
 554     if (SUCCEEDED(hr))
 555         hr = IPin_QueryInterface(This->pOutputPin, &IID_IAsyncReader, (LPVOID *)&pReader);
 556
 557     /* store file name & media type */
 558     if (SUCCEEDED(hr))
 559     {
 560         CoTaskMemFree(This->pszFileName);
 561         if (This->pmt)
 562             FreeMediaType(This->pmt);
 563
 564         This->pszFileName = CoTaskMemAlloc((strlenW(pszFileName) + 1) * sizeof(WCHAR));
 565         strcpyW(This->pszFileName, pszFileName);
 566
 567         This->pmt = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE));
 568         if (!pmt)
 569         {
 570             This->pmt->bFixedSizeSamples = TRUE;
 571             This->pmt->bTemporalCompression = FALSE;
 572             This->pmt->cbFormat = 0;
 573             This->pmt->pbFormat = NULL;
 574             This->pmt->pUnk = NULL;
 575             This->pmt->lSampleSize = 0;
 576             This->pmt->formattype = FORMAT_None;
 577             hr = GetClassMediaFile(pReader, pszFileName, &This->pmt->majortype, &This->pmt->subtype);
 578             if (FAILED(hr))
 579             {
 580                 CoTaskMemFree(This->pmt);
 581                 This->pmt = NULL;
 582             }
 583         }
 584         else
 585             CopyMediaType(This->pmt, pmt);
 586     }
 587
 588     if (pReader)
 589         IAsyncReader_Release(pReader);
 590
 591     if (FAILED(hr))
 592     {
 593         if (This->pOutputPin)
 594         {
 595             IPin_Release(This->pOutputPin);
 596             This->pOutputPin = NULL;
 597         }
 598
 599         CoTaskMemFree(This->pszFileName);
 600         if (This->pmt)
 601             FreeMediaType(This->pmt);
 602         This->pszFileName = NULL;
 603         This->pmt = NULL;
 604
 605         CloseHandle(hFile);
 606     }
 607
 608     /* FIXME: check return codes */
 609     return hr;
 610 }
 611
 612 static HRESULT WINAPI FileSource_GetCurFile(IFileSourceFilter * iface, LPOLESTR * ppszFileName, AM_MEDIA_TYPE * pmt)
 613 {
 614     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 615
 616     TRACE("(%p, %p)\n", ppszFileName, pmt);
 617
 618     if (!ppszFileName)
 619         return E_POINTER;
 620
 621     /* copy file name & media type if available, otherwise clear the outputs */
 622     if (This->pszFileName)
 623     {
 624         *ppszFileName = CoTaskMemAlloc((strlenW(This->pszFileName) + 1) * sizeof(WCHAR));
 625         strcpyW(*ppszFileName, This->pszFileName);
 626     }
 627     else
 628         *ppszFileName = NULL;
 629
 630     if (pmt)
 631     {
 632         if (This->pmt)
 633             CopyMediaType(pmt, This->pmt);
 634         else
 635             ZeroMemory(pmt, sizeof(*pmt));
 636     }
 637
 638     return S_OK;
 639 }
 640
 641 static const IFileSourceFilterVtbl FileSource_Vtbl =
 642 {
 643     FileSource_QueryInterface,
 644     FileSource_AddRef,
 645     FileSource_Release,
 646     FileSource_Load,
 647     FileSource_GetCurFile
 648 };
 649
 650
 651 /* the dwUserData passed back to user */
 652 typedef struct DATAREQUEST
 653 {
 654     IMediaSample * pSample; /* sample passed to us by user */
 655     DWORD_PTR dwUserData; /* user data passed to us */
 656     OVERLAPPED ovl; /* our overlapped structure */
 657 } DATAREQUEST;
 658
 659 typedef struct FileAsyncReader
 660 {
 661     BaseOutputPin pin;
 662     const struct IAsyncReaderVtbl * lpVtblAR;
 663
 664     ALLOCATOR_PROPERTIES allocProps;
 665     HANDLE hFile;
 666     BOOL bFlushing;
 667     /* Why would you need more? Every sample has its own handle */
 668     LONG queued_number;
 669     LONG samples;
 670     LONG oldest_sample;
 671     CRITICAL_SECTION csList; /* critical section to prevent concurrency issues */
 672     DATAREQUEST *sample_list;
 673
 674     /* Have a handle for every sample, and then one more as flushing handle */
 675     HANDLE *handle_list;
 676 } FileAsyncReader;
 677
 678 static inline FileAsyncReader *impl_from_IAsyncReader( IAsyncReader *iface )
 679 {
 680     return (FileAsyncReader *)((char*)iface - FIELD_OFFSET(FileAsyncReader, lpVtblAR));
 681 }
 682
 683 static HRESULT WINAPI FileAsyncReaderPin_QueryAccept(IPin *iface, const AM_MEDIA_TYPE *pmt)
 684 {
 685     FileAsyncReader *This = (FileAsyncReader *)iface;
 686     AM_MEDIA_TYPE *pmt_filter = ((AsyncReader *)This->pin.pin.pinInfo.pFilter)->pmt;
 687
 688     FIXME("(%p, %p)\n", iface, pmt);
 689
 690     if (IsEqualGUID(&pmt->majortype, &pmt_filter->majortype) &&
 691         IsEqualGUID(&pmt->subtype, &pmt_filter->subtype) &&
 692         IsEqualGUID(&pmt->formattype, &FORMAT_None))
 693         return S_OK;
 694
 695     return S_FALSE;
 696 }
 697
 698 static HRESULT WINAPI FileAsyncReaderPin_GetMediaType(BasePin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
 699 {
 700     FileAsyncReader *This = (FileAsyncReader *)iface;
 701     if (iPosition < 0)
 702         return E_INVALIDARG;
 703     if (iPosition > 0)
 704         return VFW_S_NO_MORE_ITEMS;
 705     CopyMediaType(pmt, ((AsyncReader *)This->pin.pin.pinInfo.pFilter)->pmt);
 706     return S_OK;
 707 }
 708
 709 /* overridden pin functions */
 710
 711 static HRESULT WINAPI FileAsyncReaderPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 712 {
 713     FileAsyncReader *This = (FileAsyncReader *)iface;
 714     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 715
 716     *ppv = NULL;
 717
 718     if (IsEqualIID(riid, &IID_IUnknown))
 719         *ppv = This;
 720     else if (IsEqualIID(riid, &IID_IPin))
 721         *ppv = This;
 722     else if (IsEqualIID(riid, &IID_IAsyncReader))
 723         *ppv = &This->lpVtblAR;
 724
 725     if (*ppv)
 726     {
 727         IUnknown_AddRef((IUnknown *)(*ppv));
 728         return S_OK;
 729     }
 730
 731     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IMediaSeeking))
 732         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 733
 734     return E_NOINTERFACE;
 735 }
 736
 737 static ULONG WINAPI FileAsyncReaderPin_Release(IPin * iface)
 738 {
 739     FileAsyncReader *This = (FileAsyncReader *)iface;
 740     ULONG refCount = InterlockedDecrement(&This->pin.pin.refCount);
 741     int x;
 742
 743     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 744
 745     if (!refCount)
 746     {
 747         CoTaskMemFree(This->sample_list);
 748         if (This->handle_list)
 749         {
 750             for (x = 0; x <= This->samples; ++x)
 751                 CloseHandle(This->handle_list[x]);
 752             CoTaskMemFree(This->handle_list);
 753         }
 754         CloseHandle(This->hFile);
 755         This->csList.DebugInfo->Spare[0] = 0;
 756         DeleteCriticalSection(&This->csList);
 757         CoTaskMemFree(This);
 758         return 0;
 759     }
 760     return refCount;
 761 }
 762
 763 static const IPinVtbl FileAsyncReaderPin_Vtbl =
 764 {
 765     FileAsyncReaderPin_QueryInterface,
 766     BasePinImpl_AddRef,
 767     FileAsyncReaderPin_Release,
 768     BaseOutputPinImpl_Connect,
 769     BaseOutputPinImpl_ReceiveConnection,
 770     BasePinImpl_Disconnect,
 771     BasePinImpl_ConnectedTo,
 772     BasePinImpl_ConnectionMediaType,
 773     BasePinImpl_QueryPinInfo,
 774     BasePinImpl_QueryDirection,
 775     BasePinImpl_QueryId,
 776     FileAsyncReaderPin_QueryAccept,
 777     BasePinImpl_EnumMediaTypes,
 778     BasePinImpl_QueryInternalConnections,
 779     BaseOutputPinImpl_EndOfStream,
 780     BaseOutputPinImpl_BeginFlush,
 781     BaseOutputPinImpl_EndFlush,
 782     BaseOutputPinImpl_NewSegment
 783 };
 784
 785 /* Function called as a helper to IPin_Connect */
 786 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 787 /* this differs from standard OutputPin_AttemptConnection only in that it
 788  * doesn't need the IMemInputPin interface on the receiving pin */
 789 static HRESULT WINAPI FileAsyncReaderPin_AttemptConnection(BasePin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 790 {
 791     BaseOutputPin *This = (BaseOutputPin *)iface;
 792     HRESULT hr;
 793
 794     TRACE("(%p, %p)\n", pReceivePin, pmt);
 795     dump_AM_MEDIA_TYPE(pmt);
 796
 797     /* FIXME: call queryacceptproc */
 798
 799     This->pin.pConnectedTo = pReceivePin;
 800     IPin_AddRef(pReceivePin);
 801     CopyMediaType(&This->pin.mtCurrent, pmt);
 802
 803     hr = IPin_ReceiveConnection(pReceivePin, (IPin*)iface, pmt);
 804
 805     if (FAILED(hr))
 806     {
 807         IPin_Release(This->pin.pConnectedTo);
 808         This->pin.pConnectedTo = NULL;
 809         FreeMediaType(&This->pin.mtCurrent);
 810     }
 811
 812     TRACE(" -- %x\n", hr);
 813     return hr;
 814 }
 815
 816 static HRESULT WINAPI FileAsyncReaderPin_DecideBufferSize(BaseOutputPin *iface, IMemAllocator *pAlloc, ALLOCATOR_PROPERTIES *ppropInputRequest)
 817 {
 818     FileAsyncReader *This = (FileAsyncReader *)iface;
 819     ALLOCATOR_PROPERTIES actual;
 820
 821     if (ppropInputRequest->cbAlign && ppropInputRequest->cbAlign != This->allocProps.cbAlign)
 822         FIXME("Requested Buffer cbAlign mismatch %i,%i\n",This->allocProps.cbAlign, ppropInputRequest->cbAlign);
 823     if (ppropInputRequest->cbPrefix)
 824         FIXME("Requested Buffer cbPrefix mismatch %i,%i\n",This->allocProps.cbPrefix, ppropInputRequest->cbPrefix);
 825     if (ppropInputRequest->cbBuffer)
 826         FIXME("Requested Buffer cbBuffer mismatch %i,%i\n",This->allocProps.cbBuffer, ppropInputRequest->cbBuffer);
 827     if (ppropInputRequest->cBuffers)
 828         FIXME("Requested Buffer cBuffers mismatch %i,%i\n",This->allocProps.cBuffers, ppropInputRequest->cBuffers);
 829
 830     return IMemAllocator_SetProperties(pAlloc, &This->allocProps, &actual);
 831 }
 832
 833 static const  BasePinFuncTable output_BaseFuncTable = {
 834     NULL,
 835     FileAsyncReaderPin_AttemptConnection,
 836     BasePinImpl_GetMediaTypeVersion,
 837     FileAsyncReaderPin_GetMediaType
 838 };
 839
 840 static const BaseOutputPinFuncTable output_BaseOutputFuncTable = {
 841     FileAsyncReaderPin_DecideBufferSize,
 842     BaseOutputPinImpl_DecideAllocator,
 843     BaseOutputPinImpl_BreakConnect
 844 };
 845
 846 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 847 {
 848     PIN_INFO piOutput;
 849     HRESULT hr;
 850
 851     *ppPin = NULL;
 852     piOutput.dir = PINDIR_OUTPUT;
 853     piOutput.pFilter = pBaseFilter;
 854     strcpyW(piOutput.achName, wszOutputPinName);
 855     hr = BaseOutputPin_Construct(&FileAsyncReaderPin_Vtbl, sizeof(FileAsyncReader), &piOutput, &output_BaseFuncTable, &output_BaseOutputFuncTable, pCritSec, ppPin);
 856
 857     if (SUCCEEDED(hr))
 858     {
 859         FileAsyncReader *pPinImpl =  (FileAsyncReader *)*ppPin;
 860         pPinImpl->lpVtblAR = &FileAsyncReader_Vtbl;
 861         pPinImpl->hFile = hFile;
 862         pPinImpl->bFlushing = FALSE;
 863         pPinImpl->sample_list = NULL;
 864         pPinImpl->handle_list = NULL;
 865         pPinImpl->queued_number = 0;
 866         InitializeCriticalSection(&pPinImpl->csList);
 867         pPinImpl->csList.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FileAsyncReader.csList");
 868     }
 869     return hr;
 870 }
 871
 872 /* IAsyncReader */
 873
 874 static HRESULT WINAPI FileAsyncReader_QueryInterface(IAsyncReader * iface, REFIID riid, LPVOID * ppv)
 875 {
 876     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 877
 878     return IPin_QueryInterface((IPin *)This, riid, ppv);
 879 }
 880
 881 static ULONG WINAPI FileAsyncReader_AddRef(IAsyncReader * iface)
 882 {
 883     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 884
 885     return IPin_AddRef((IPin *)This);
 886 }
 887
 888 static ULONG WINAPI FileAsyncReader_Release(IAsyncReader * iface)
 889 {
 890     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 891
 892     return IPin_Release((IPin *)This);
 893 }
 894
 895 #define DEF_ALIGNMENT 1
 896
 897 static HRESULT WINAPI FileAsyncReader_RequestAllocator(IAsyncReader * iface, IMemAllocator * pPreferred, ALLOCATOR_PROPERTIES * pProps, IMemAllocator ** ppActual)
 898 {
 899     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 900
 901     HRESULT hr = S_OK;
 902
 903     TRACE("(%p, %p, %p)\n", pPreferred, pProps, ppActual);
 904
 905     if (!pProps->cbAlign || (pProps->cbAlign % DEF_ALIGNMENT) != 0)
 906         pProps->cbAlign = DEF_ALIGNMENT;
 907
 908     if (pPreferred)
 909     {
 910         hr = IMemAllocator_SetProperties(pPreferred, pProps, pProps);
 911         /* FIXME: check we are still aligned */
 912         if (SUCCEEDED(hr))
 913         {
 914             IMemAllocator_AddRef(pPreferred);
 915             *ppActual = pPreferred;
 916             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 917             goto done;
 918         }
 919     }
 920
 921     pPreferred = NULL;
 922
 923     hr = CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC, &IID_IMemAllocator, (LPVOID *)&pPreferred);
 924
 925     if (SUCCEEDED(hr))
 926     {
 927         hr = IMemAllocator_SetProperties(pPreferred, pProps, pProps);
 928         /* FIXME: check we are still aligned */
 929         if (SUCCEEDED(hr))
 930         {
 931             *ppActual = pPreferred;
 932             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 933         }
 934     }
 935
 936 done:
 937     if (SUCCEEDED(hr))
 938     {
 939         CoTaskMemFree(This->sample_list);
 940         if (This->handle_list)
 941         {
 942             int x;
 943             for (x = 0; x <= This->samples; ++x)
 944                 CloseHandle(This->handle_list[x]);
 945             CoTaskMemFree(This->handle_list);
 946         }
 947
 948         This->samples = pProps->cBuffers;
 949         This->oldest_sample = 0;
 950         TRACE("Samples: %u\n", This->samples);
 951         This->sample_list = CoTaskMemAlloc(sizeof(This->sample_list[0]) * pProps->cBuffers);
 952         This->handle_list = CoTaskMemAlloc(sizeof(HANDLE) * pProps->cBuffers * 2);
 953
 954         if (This->sample_list && This->handle_list)
 955         {
 956             int x;
 957             ZeroMemory(This->sample_list, sizeof(This->sample_list[0]) * pProps->cBuffers);
 958             for (x = 0; x < This->samples; ++x)
 959             {
 960                 This->sample_list[x].ovl.hEvent = This->handle_list[x] = CreateEventW(NULL, 0, 0, NULL);
 961                 if (x + 1 < This->samples)
 962                     This->handle_list[This->samples + 1 + x] = This->handle_list[x];
 963             }
 964             This->handle_list[This->samples] = CreateEventW(NULL, 1, 0, NULL);
 965             This->allocProps = *pProps;
 966         }
 967         else
 968         {
 969             hr = E_OUTOFMEMORY;
 970             CoTaskMemFree(This->sample_list);
 971             CoTaskMemFree(This->handle_list);
 972             This->samples = 0;
 973             This->sample_list = NULL;
 974             This->handle_list = NULL;
 975         }
 976     }
 977
 978     if (FAILED(hr))
 979     {
 980         *ppActual = NULL;
 981         if (pPreferred)
 982             IMemAllocator_Release(pPreferred);
 983     }
 984
 985     TRACE("-- %x\n", hr);
 986     return hr;
 987 }
 988
 989 /* we could improve the Request/WaitForNext mechanism by allowing out of order samples.
 990  * however, this would be quite complicated to do and may be a bit error prone */
 991 static HRESULT WINAPI FileAsyncReader_Request(IAsyncReader * iface, IMediaSample * pSample, DWORD_PTR dwUser)
 992 {
 993     HRESULT hr = S_OK;
 994     REFERENCE_TIME Start;
 995     REFERENCE_TIME Stop;
 996     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 997     LPBYTE pBuffer = NULL;
 998
 999     TRACE("(%p, %lx)\n", pSample, dwUser);
1000
1001     if (!pSample)
1002         return E_POINTER;
1003
1004     /* get start and stop positions in bytes */
1005     if (SUCCEEDED(hr))
1006         hr = IMediaSample_GetTime(pSample, &Start, &Stop);
1007
1008     if (SUCCEEDED(hr))
1009         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1010
1011     EnterCriticalSection(&This->csList);
1012     if (This->bFlushing)
1013     {
1014         LeaveCriticalSection(&This->csList);
1015         return VFW_E_WRONG_STATE;
1016     }
1017
1018     if (SUCCEEDED(hr))
1019     {
1020         DWORD dwLength = (DWORD) BYTES_FROM_MEDIATIME(Stop - Start);
1021         DATAREQUEST *pDataRq;
1022         int x;
1023
1024         /* Try to insert above the waiting sample if possible */
1025         for (x = This->oldest_sample; x < This->samples; ++x)
1026         {
1027             if (!This->sample_list[x].pSample)
1028                 break;
1029         }
1030
1031         if (x >= This->samples)
1032             for (x = 0; x < This->oldest_sample; ++x)
1033             {
1034                 if (!This->sample_list[x].pSample)
1035                     break;
1036             }
1037
1038         /* There must be a sample we have found */
1039         assert(x < This->samples);
1040         ++This->queued_number;
1041
1042         pDataRq = This->sample_list + x;
1043
1044         pDataRq->ovl.u.s.Offset = (DWORD) BYTES_FROM_MEDIATIME(Start);
1045         pDataRq->ovl.u.s.OffsetHigh = (DWORD)(BYTES_FROM_MEDIATIME(Start) >> (sizeof(DWORD) * 8));
1046         pDataRq->dwUserData = dwUser;
1047
1048         /* we violate traditional COM rules here by maintaining
1049          * a reference to the sample, but not calling AddRef, but
1050          * that's what MSDN says to do */
1051         pDataRq->pSample = pSample;
1052
1053         /* this is definitely not how it is implemented on Win9x
1054          * as they do not support async reads on files, but it is
1055          * sooo much easier to use this than messing around with threads!
1056          */
1057         if (!ReadFile(This->hFile, pBuffer, dwLength, NULL, &pDataRq->ovl))
1058             hr = HRESULT_FROM_WIN32(GetLastError());
1059
1060         /* ERROR_IO_PENDING is not actually an error since this is what we want! */
1061         if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1062             hr = S_OK;
1063     }
1064
1065     LeaveCriticalSection(&This->csList);
1066
1067     TRACE("-- %x\n", hr);
1068     return hr;
1069 }
1070
1071 static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dwTimeout, IMediaSample ** ppSample, DWORD_PTR * pdwUser)
1072 {
1073     HRESULT hr = S_OK;
1074     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1075     DWORD buffer = ~0;
1076
1077     TRACE("(%u, %p, %p)\n", dwTimeout, ppSample, pdwUser);
1078
1079     *ppSample = NULL;
1080     *pdwUser = 0;
1081
1082     EnterCriticalSection(&This->csList);
1083     if (!This->bFlushing)
1084     {
1085         LONG oldest = This->oldest_sample;
1086
1087         if (!This->queued_number)
1088         {
1089             /* It could be that nothing is queued right now, but that can be fixed */
1090             WARN("Called without samples in queue and not flushing!!\n");
1091         }
1092         LeaveCriticalSection(&This->csList);
1093
1094         /* wait for an object to read, or time out */
1095         buffer = WaitForMultipleObjectsEx(This->samples+1, This->handle_list + oldest, FALSE, dwTimeout, TRUE);
1096
1097         EnterCriticalSection(&This->csList);
1098         if (buffer <= This->samples)
1099         {
1100             /* Re-scale the buffer back to normal */
1101             buffer += oldest;
1102
1103             /* Uh oh, we overshot the flusher handle, renormalize it back to 0..Samples-1 */
1104             if (buffer > This->samples)
1105                 buffer -= This->samples + 1;
1106             assert(buffer <= This->samples);
1107         }
1108
1109         if (buffer >= This->samples)
1110         {
1111             if (buffer != This->samples)
1112             {
1113                 FIXME("Returned: %u (%08x)\n", buffer, GetLastError());
1114                 hr = VFW_E_TIMEOUT;
1115             }
1116             else
1117                 hr = VFW_E_WRONG_STATE;
1118             buffer = ~0;
1119         }
1120         else
1121             --This->queued_number;
1122     }
1123
1124     if (This->bFlushing && buffer == ~0)
1125     {
1126         for (buffer = 0; buffer < This->samples; ++buffer)
1127         {
1128             if (This->sample_list[buffer].pSample)
1129             {
1130                 ResetEvent(This->handle_list[buffer]);
1131                 break;
1132             }
1133         }
1134         if (buffer == This->samples)
1135         {
1136             assert(!This->queued_number);
1137             hr = VFW_E_TIMEOUT;
1138         }
1139         else
1140         {
1141             --This->queued_number;
1142             hr = S_OK;
1143         }
1144     }
1145
1146     if (SUCCEEDED(hr))
1147     {
1148         REFERENCE_TIME rtStart, rtStop;
1149         REFERENCE_TIME rtSampleStart, rtSampleStop;
1150         DATAREQUEST *pDataRq = This->sample_list + buffer;
1151         DWORD dwBytes = 0;
1152
1153         /* get any errors */
1154         if (!This->bFlushing && !GetOverlappedResult(This->hFile, &pDataRq->ovl, &dwBytes, FALSE))
1155             hr = HRESULT_FROM_WIN32(GetLastError());
1156
1157         /* Return the sample no matter what so it can be destroyed */
1158         *ppSample = pDataRq->pSample;
1159         *pdwUser = pDataRq->dwUserData;
1160
1161         if (This->bFlushing)
1162             hr = VFW_E_WRONG_STATE;
1163
1164         if (FAILED(hr))
1165             dwBytes = 0;
1166
1167         /* Set the time on the sample */
1168         IMediaSample_SetActualDataLength(pDataRq->pSample, dwBytes);
1169
1170         rtStart = (DWORD64)pDataRq->ovl.u.s.Offset + ((DWORD64)pDataRq->ovl.u.s.OffsetHigh << 32);
1171         rtStart = MEDIATIME_FROM_BYTES(rtStart);
1172         rtStop = rtStart + MEDIATIME_FROM_BYTES(dwBytes);
1173
1174         IMediaSample_GetTime(pDataRq->pSample, &rtSampleStart, &rtSampleStop);
1175         assert(rtStart == rtSampleStart);
1176         assert(rtStop <= rtSampleStop);
1177
1178         IMediaSample_SetTime(pDataRq->pSample, &rtStart, &rtStop);
1179         assert(rtStart == rtSampleStart);
1180         if (hr == S_OK)
1181             assert(rtStop == rtSampleStop);
1182         else
1183             assert(rtStop == rtStart);
1184
1185         This->sample_list[buffer].pSample = NULL;
1186         assert(This->oldest_sample < This->samples);
1187
1188         if (buffer == This->oldest_sample)
1189         {
1190             LONG x;
1191             for (x = This->oldest_sample + 1; x < This->samples; ++x)
1192                 if (This->sample_list[x].pSample)
1193                     break;
1194             if (x >= This->samples)
1195                 for (x = 0; x < This->oldest_sample; ++x)
1196                     if (This->sample_list[x].pSample)
1197                         break;
1198             if (This->oldest_sample == x)
1199                 /* No samples found, reset to 0 */
1200                 x = 0;
1201             This->oldest_sample = x;
1202         }
1203     }
1204     LeaveCriticalSection(&This->csList);
1205
1206     TRACE("-- %x\n", hr);
1207     return hr;
1208 }
1209
1210 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer);
1211
1212 static HRESULT WINAPI FileAsyncReader_SyncReadAligned(IAsyncReader * iface, IMediaSample * pSample)
1213 {
1214     BYTE * pBuffer;
1215     REFERENCE_TIME tStart;
1216     REFERENCE_TIME tStop;
1217     HRESULT hr;
1218
1219     TRACE("(%p)\n", pSample);
1220
1221     hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
1222
1223     if (SUCCEEDED(hr))
1224         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1225
1226     if (SUCCEEDED(hr))
1227         hr = FileAsyncReader_SyncRead(iface,
1228             BYTES_FROM_MEDIATIME(tStart),
1229             (LONG) BYTES_FROM_MEDIATIME(tStop - tStart),
1230             pBuffer);
1231
1232     TRACE("-- %x\n", hr);
1233     return hr;
1234 }
1235
1236 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer)
1237 {
1238     OVERLAPPED ovl;
1239     HRESULT hr = S_OK;
1240     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1241
1242     TRACE("(%x%08x, %d, %p)\n", (ULONG)(llPosition >> 32), (ULONG)llPosition, lLength, pBuffer);
1243
1244     ZeroMemory(&ovl, sizeof(ovl));
1245
1246     ovl.hEvent = CreateEventW(NULL, 0, 0, NULL);
1247     /* NOTE: llPosition is the actual byte position to start reading from */
1248     ovl.u.s.Offset = (DWORD) llPosition;
1249     ovl.u.s.OffsetHigh = (DWORD) (llPosition >> (sizeof(DWORD) * 8));
1250
1251     if (!ReadFile(This->hFile, pBuffer, lLength, NULL, &ovl))
1252         hr = HRESULT_FROM_WIN32(GetLastError());
1253
1254     if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1255         hr = S_OK;
1256
1257     if (SUCCEEDED(hr))
1258     {
1259         DWORD dwBytesRead;
1260
1261         if (!GetOverlappedResult(This->hFile, &ovl, &dwBytesRead, TRUE))
1262             hr = HRESULT_FROM_WIN32(GetLastError());
1263     }
1264
1265     CloseHandle(ovl.hEvent);
1266
1267     TRACE("-- %x\n", hr);
1268     return hr;
1269 }
1270
1271 static HRESULT WINAPI FileAsyncReader_Length(IAsyncReader * iface, LONGLONG * pTotal, LONGLONG * pAvailable)
1272 {
1273     DWORD dwSizeLow;
1274     DWORD dwSizeHigh;
1275     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1276
1277     TRACE("(%p, %p)\n", pTotal, pAvailable);
1278
1279     if (((dwSizeLow = GetFileSize(This->hFile, &dwSizeHigh)) == -1) &&
1280         (GetLastError() != NO_ERROR))
1281         return HRESULT_FROM_WIN32(GetLastError());
1282
1283     *pTotal = (LONGLONG)dwSizeLow | (LONGLONG)dwSizeHigh << (sizeof(DWORD) * 8);
1284
1285     *pAvailable = *pTotal;
1286
1287     return S_OK;
1288 }
1289
1290 static HRESULT WINAPI FileAsyncReader_BeginFlush(IAsyncReader * iface)
1291 {
1292     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1293
1294     TRACE("()\n");
1295
1296     EnterCriticalSection(&This->csList);
1297     This->bFlushing = TRUE;
1298     CancelIo(This->hFile);
1299     SetEvent(This->handle_list[This->samples]);
1300     LeaveCriticalSection(&This->csList);
1301
1302     return S_OK;
1303 }
1304
1305 static HRESULT WINAPI FileAsyncReader_EndFlush(IAsyncReader * iface)
1306 {
1307     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1308     int x;
1309
1310     TRACE("()\n");
1311
1312     EnterCriticalSection(&This->csList);
1313     ResetEvent(This->handle_list[This->samples]);
1314     This->bFlushing = FALSE;
1315     for (x = 0; x < This->samples; ++x)
1316         assert(!This->sample_list[x].pSample);
1317
1318     LeaveCriticalSection(&This->csList);
1319
1320     return S_OK;
1321 }
1322
1323 static const IAsyncReaderVtbl FileAsyncReader_Vtbl =
1324 {
1325     FileAsyncReader_QueryInterface,
1326     FileAsyncReader_AddRef,
1327     FileAsyncReader_Release,
1328     FileAsyncReader_RequestAllocator,
1329     FileAsyncReader_Request,
1330     FileAsyncReader_WaitForNext,
1331     FileAsyncReader_SyncReadAligned,
1332     FileAsyncReader_SyncRead,
1333     FileAsyncReader_Length,
1334     FileAsyncReader_BeginFlush,
1335     FileAsyncReader_EndFlush,
1336 };