reactos/dll/directx/wine/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 #include "quartz_private.h"
  22
  23 static const WCHAR wszOutputPinName[] = { 'O','u','t','p','u','t',0 };
  24
  25 typedef struct AsyncReader
  26 {
  27     BaseFilter filter;
  28     IFileSourceFilter IFileSourceFilter_iface;
  29     IAMFilterMiscFlags IAMFilterMiscFlags_iface;
  30
  31     IPin * pOutputPin;
  32     LPOLESTR pszFileName;
  33     AM_MEDIA_TYPE * pmt;
  34 } AsyncReader;
  35
  36 static inline AsyncReader *impl_from_BaseFilter(BaseFilter *iface)
  37 {
  38     return CONTAINING_RECORD(iface, AsyncReader, filter);
  39 }
  40
  41 static inline AsyncReader *impl_from_IBaseFilter(IBaseFilter *iface)
  42 {
  43     return CONTAINING_RECORD(iface, AsyncReader, filter.IBaseFilter_iface);
  44 }
  45
  46 static inline AsyncReader *impl_from_IFileSourceFilter(IFileSourceFilter *iface)
  47 {
  48     return CONTAINING_RECORD(iface, AsyncReader, IFileSourceFilter_iface);
  49 }
  50
  51 static inline AsyncReader *impl_from_IAMFilterMiscFlags(IAMFilterMiscFlags *iface)
  52 {
  53     return CONTAINING_RECORD(iface, AsyncReader, IAMFilterMiscFlags_iface);
  54 }
  55
  56 static const IBaseFilterVtbl AsyncReader_Vtbl;
  57 static const IFileSourceFilterVtbl FileSource_Vtbl;
  58 static const IAsyncReaderVtbl FileAsyncReader_Vtbl;
  59 static const IAMFilterMiscFlagsVtbl IAMFilterMiscFlags_Vtbl;
  60
  61 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
  62
  63 static const WCHAR mediatype_name[] = {
  64     'M', 'e', 'd', 'i', 'a', ' ', 'T', 'y', 'p', 'e', 0 };
  65 static const WCHAR subtype_name[] = {
  66     'S', 'u', 'b', 't', 'y', 'p', 'e', 0 };
  67 static const WCHAR source_filter_name[] = {
  68     'S','o','u','r','c','e',' ','F','i','l','t','e','r',0};
  69
  70 static HRESULT process_extensions(HKEY hkeyExtensions, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType, GUID * sourceFilter)
  71 {
  72     WCHAR *extension;
  73     LONG l;
  74     HKEY hsub;
  75     WCHAR keying[39];
  76     DWORD size;
  77
  78     if (!pszFileName)
  79         return E_POINTER;
  80
  81     /* Get the part of the name that matters */
  82     extension = PathFindExtensionW(pszFileName);
  83     if (*extension != '.')
  84         return E_FAIL;
  85
  86     l = RegOpenKeyExW(hkeyExtensions, extension, 0, KEY_READ, &hsub);
  87     if (l)
  88         return E_FAIL;
  89
  90     if (majorType)
  91     {
  92         size = sizeof(keying);
  93         l = RegQueryValueExW(hsub, mediatype_name, NULL, NULL, (LPBYTE)keying, &size);
  94         if (!l)
  95             CLSIDFromString(keying, majorType);
  96     }
  97
  98     if (minorType)
  99     {
 100         size = sizeof(keying);
 101         if (!l)
 102             l = RegQueryValueExW(hsub, subtype_name, NULL, NULL, (LPBYTE)keying, &size);
 103         if (!l)
 104             CLSIDFromString(keying, minorType);
 105     }
 106
 107     if (sourceFilter)
 108     {
 109         size = sizeof(keying);
 110         if (!l)
 111             l = RegQueryValueExW(hsub, source_filter_name, NULL, NULL, (LPBYTE)keying, &size);
 112         if (!l)
 113             CLSIDFromString(keying, sourceFilter);
 114     }
 115
 116     RegCloseKey(hsub);
 117
 118     if (!l)
 119         return S_OK;
 120     return E_FAIL;
 121 }
 122
 123 static unsigned char byte_from_hex_char(WCHAR wHex)
 124 {
 125     switch (tolowerW(wHex))
 126     {
 127     case '0':
 128     case '1':
 129     case '2':
 130     case '3':
 131     case '4':
 132     case '5':
 133     case '6':
 134     case '7':
 135     case '8':
 136     case '9':
 137         return (wHex - '0') & 0xf;
 138     case 'a':
 139     case 'b':
 140     case 'c':
 141     case 'd':
 142     case 'e':
 143     case 'f':
 144         return (wHex - 'a' + 10) & 0xf;
 145     default:
 146         return 0;
 147     }
 148 }
 149
 150 static HRESULT process_pattern_string(LPCWSTR wszPatternString, IAsyncReader * pReader)
 151 {
 152     ULONG ulOffset;
 153     ULONG ulBytes;
 154     BYTE * pbMask;
 155     BYTE * pbValue;
 156     BYTE * pbFile;
 157     HRESULT hr = S_OK;
 158     ULONG strpos;
 159
 160     TRACE("\t\tPattern string: %s\n", debugstr_w(wszPatternString));
 161
 162     /* format: "offset, bytestocompare, mask, value" */
 163
 164     ulOffset = strtolW(wszPatternString, NULL, 10);
 165
 166     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 167         return E_INVALIDARG;
 168
 169     wszPatternString++; /* skip ',' */
 170
 171     ulBytes = strtolW(wszPatternString, NULL, 10);
 172
 173     pbMask = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 174     pbValue = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, ulBytes);
 175     pbFile = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 176
 177     /* default mask is match everything */
 178     memset(pbMask, 0xFF, ulBytes);
 179
 180     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 181         hr = E_INVALIDARG;
 182
 183     if (hr == S_OK)
 184     {
 185         wszPatternString++; /* skip ',' */
 186         while (!isxdigitW(*wszPatternString) && (*wszPatternString != ',')) wszPatternString++;
 187
 188         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 189         {
 190             if ((strpos % 2) == 1) /* odd numbered position */
 191                 pbMask[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 192             else
 193                 pbMask[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 194         }
 195
 196         if (!(wszPatternString = strchrW(wszPatternString, ',')))
 197             hr = E_INVALIDARG;
 198         else
 199             wszPatternString++; /* skip ',' */
 200     }
 201
 202     if (hr == S_OK)
 203     {
 204         for ( ; !isxdigitW(*wszPatternString) && (*wszPatternString != ','); wszPatternString++)
 205             ;
 206
 207         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 208         {
 209             if ((strpos % 2) == 1) /* odd numbered position */
 210                 pbValue[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 211             else
 212                 pbValue[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 213         }
 214     }
 215
 216     if (hr == S_OK)
 217         hr = IAsyncReader_SyncRead(pReader, ulOffset, ulBytes, pbFile);
 218
 219     if (hr == S_OK)
 220     {
 221         ULONG i;
 222         for (i = 0; i < ulBytes; i++)
 223             if ((pbFile[i] & pbMask[i]) != pbValue[i])
 224             {
 225                 hr = S_FALSE;
 226                 break;
 227             }
 228     }
 229
 230     HeapFree(GetProcessHeap(), 0, pbMask);
 231     HeapFree(GetProcessHeap(), 0, pbValue);
 232     HeapFree(GetProcessHeap(), 0, pbFile);
 233
 234     /* if we encountered no errors with this string, and there is a following tuple, then we
 235      * have to match that as well to succeed */
 236     if ((hr == S_OK) && (wszPatternString = strchrW(wszPatternString, ',')))
 237         return process_pattern_string(wszPatternString + 1, pReader);
 238     else
 239         return hr;
 240 }
 241
 242 HRESULT GetClassMediaFile(IAsyncReader * pReader, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType, GUID * sourceFilter)
 243 {
 244     HKEY hkeyMediaType = NULL;
 245     LONG lRet;
 246     HRESULT hr = S_OK;
 247     BOOL bFound = FALSE;
 248     static const WCHAR wszMediaType[] = {'M','e','d','i','a',' ','T','y','p','e',0};
 249
 250     TRACE("(%p, %s, %p, %p)\n", pReader, debugstr_w(pszFileName), majorType, minorType);
 251
 252     if(majorType)
 253         *majorType = GUID_NULL;
 254     if(minorType)
 255         *minorType = GUID_NULL;
 256     if(sourceFilter)
 257         *sourceFilter = GUID_NULL;
 258
 259     lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszMediaType, 0, KEY_READ, &hkeyMediaType);
 260     hr = HRESULT_FROM_WIN32(lRet);
 261
 262     if (SUCCEEDED(hr))
 263     {
 264         DWORD indexMajor;
 265
 266         for (indexMajor = 0; !bFound; indexMajor++)
 267         {
 268             HKEY hkeyMajor;
 269             WCHAR wszMajorKeyName[CHARS_IN_GUID];
 270             DWORD dwKeyNameLength = sizeof(wszMajorKeyName) / sizeof(wszMajorKeyName[0]);
 271             static const WCHAR wszExtensions[] = {'E','x','t','e','n','s','i','o','n','s',0};
 272
 273             if (RegEnumKeyExW(hkeyMediaType, indexMajor, wszMajorKeyName, &dwKeyNameLength, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 274                 break;
 275             if (RegOpenKeyExW(hkeyMediaType, wszMajorKeyName, 0, KEY_READ, &hkeyMajor) != ERROR_SUCCESS)
 276                 break;
 277             TRACE("%s\n", debugstr_w(wszMajorKeyName));
 278             if (!strcmpW(wszExtensions, wszMajorKeyName))
 279             {
 280                 if (process_extensions(hkeyMajor, pszFileName, majorType, minorType, sourceFilter) == S_OK)
 281                     bFound = TRUE;
 282             }
 283             /* We need a reader interface to check bytes */
 284             else if (pReader)
 285             {
 286                 DWORD indexMinor;
 287
 288                 for (indexMinor = 0; !bFound; indexMinor++)
 289                 {
 290                     HKEY hkeyMinor;
 291                     WCHAR wszMinorKeyName[CHARS_IN_GUID];
 292                     DWORD dwMinorKeyNameLen = sizeof(wszMinorKeyName) / sizeof(wszMinorKeyName[0]);
 293                     WCHAR wszSourceFilterKeyName[CHARS_IN_GUID];
 294                     DWORD dwSourceFilterKeyNameLen = sizeof(wszSourceFilterKeyName);
 295                     DWORD maxValueLen;
 296                     DWORD indexValue;
 297
 298                     if (RegEnumKeyExW(hkeyMajor, indexMinor, wszMinorKeyName, &dwMinorKeyNameLen, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 299                         break;
 300
 301                     if (RegOpenKeyExW(hkeyMajor, wszMinorKeyName, 0, KEY_READ, &hkeyMinor) != ERROR_SUCCESS)
 302                         break;
 303
 304                     TRACE("\t%s\n", debugstr_w(wszMinorKeyName));
 305
 306                     if (RegQueryInfoKeyW(hkeyMinor, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &maxValueLen, NULL, NULL) != ERROR_SUCCESS)
 307                         break;
 308
 309                     for (indexValue = 0; !bFound; indexValue++)
 310                     {
 311                         DWORD dwType;
 312                         WCHAR wszValueName[14]; /* longest name we should encounter will be "Source Filter" */
 313                         LPWSTR wszPatternString = HeapAlloc(GetProcessHeap(), 0, maxValueLen);
 314                         DWORD dwValueNameLen = sizeof(wszValueName) / sizeof(wszValueName[0]); /* remember this is in chars */
 315                         DWORD dwDataLen = maxValueLen; /* remember this is in bytes */
 316
 317                         if (RegEnumValueW(hkeyMinor, indexValue, wszValueName, &dwValueNameLen, NULL, &dwType, (LPBYTE)wszPatternString, &dwDataLen) != ERROR_SUCCESS)
 318                         {
 319                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 320                             break;
 321                         }
 322
 323                         if (strcmpW(wszValueName, source_filter_name)==0) {
 324                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 325                             continue;
 326                         }
 327
 328                         /* if it is not the source filter value */
 329                         if (process_pattern_string(wszPatternString, pReader) == S_OK)
 330                         {
 331                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 332                             if (majorType && FAILED(CLSIDFromString(wszMajorKeyName, majorType)))
 333                                 break;
 334                             if (minorType && FAILED(CLSIDFromString(wszMinorKeyName, minorType)))
 335                                 break;
 336                             if (sourceFilter)
 337                             {
 338                                 /* Look up the source filter key */
 339                                 if (RegQueryValueExW(hkeyMinor, source_filter_name, NULL, NULL, (LPBYTE)wszSourceFilterKeyName, &dwSourceFilterKeyNameLen))
 340                                     break;
 341                                 if (FAILED(CLSIDFromString(wszSourceFilterKeyName, sourceFilter)))
 342                                     break;
 343                             }
 344                             bFound = TRUE;
 345                         } else
 346                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 347                     }
 348                     CloseHandle(hkeyMinor);
 349                 }
 350             }
 351             CloseHandle(hkeyMajor);
 352         }
 353     }
 354     CloseHandle(hkeyMediaType);
 355
 356     if (SUCCEEDED(hr) && !bFound)
 357     {
 358         ERR("Media class not found\n");
 359         hr = E_FAIL;
 360     }
 361     else if (bFound)
 362     {
 363         TRACE("Found file's class:\n");
 364         if(majorType)
 365                 TRACE("\tmajor = %s\n", qzdebugstr_guid(majorType));
 366         if(minorType)
 367                 TRACE("\tsubtype = %s\n", qzdebugstr_guid(minorType));
 368         if(sourceFilter)
 369                 TRACE("\tsource filter = %s\n", qzdebugstr_guid(sourceFilter));
 370     }
 371
 372     return hr;
 373 }
 374
 375 static IPin* WINAPI AsyncReader_GetPin(BaseFilter *iface, int pos)
 376 {
 377     AsyncReader *This = impl_from_BaseFilter(iface);
 378
 379     if (pos >= 1 || !This->pOutputPin)
 380         return NULL;
 381
 382     IPin_AddRef(This->pOutputPin);
 383     return This->pOutputPin;
 384 }
 385
 386 static LONG WINAPI AsyncReader_GetPinCount(BaseFilter *iface)
 387 {
 388     AsyncReader *This = impl_from_BaseFilter(iface);
 389
 390     if (!This->pOutputPin)
 391         return 0;
 392     else
 393         return 1;
 394 }
 395
 396 static const BaseFilterFuncTable BaseFuncTable = {
 397     AsyncReader_GetPin,
 398     AsyncReader_GetPinCount
 399 };
 400
 401 HRESULT AsyncReader_create(IUnknown * pUnkOuter, LPVOID * ppv)
 402 {
 403     AsyncReader *pAsyncRead;
 404
 405     if( pUnkOuter )
 406         return CLASS_E_NOAGGREGATION;
 407
 408     pAsyncRead = CoTaskMemAlloc(sizeof(AsyncReader));
 409
 410     if (!pAsyncRead)
 411         return E_OUTOFMEMORY;
 412
 413     BaseFilter_Init(&pAsyncRead->filter, &AsyncReader_Vtbl, &CLSID_AsyncReader, (DWORD_PTR)(__FILE__ ": AsyncReader.csFilter"), &BaseFuncTable);
 414
 415     pAsyncRead->IFileSourceFilter_iface.lpVtbl = &FileSource_Vtbl;
 416     pAsyncRead->IAMFilterMiscFlags_iface.lpVtbl = &IAMFilterMiscFlags_Vtbl;
 417     pAsyncRead->pOutputPin = NULL;
 418
 419     pAsyncRead->pszFileName = NULL;
 420     pAsyncRead->pmt = NULL;
 421
 422     *ppv = pAsyncRead;
 423
 424     TRACE("-- created at %p\n", pAsyncRead);
 425
 426     return S_OK;
 427 }
 428
 429 /** IUnknown methods **/
 430
 431 static HRESULT WINAPI AsyncReader_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
 432 {
 433     AsyncReader *This = impl_from_IBaseFilter(iface);
 434
 435     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 436
 437     *ppv = NULL;
 438
 439     if (IsEqualIID(riid, &IID_IUnknown))
 440         *ppv = This;
 441     else if (IsEqualIID(riid, &IID_IPersist))
 442         *ppv = This;
 443     else if (IsEqualIID(riid, &IID_IMediaFilter))
 444         *ppv = This;
 445     else if (IsEqualIID(riid, &IID_IBaseFilter))
 446         *ppv = This;
 447     else if (IsEqualIID(riid, &IID_IFileSourceFilter))
 448         *ppv = &This->IFileSourceFilter_iface;
 449     else if (IsEqualIID(riid, &IID_IAMFilterMiscFlags))
 450         *ppv = &This->IAMFilterMiscFlags_iface;
 451
 452     if (*ppv)
 453     {
 454         IUnknown_AddRef((IUnknown *)(*ppv));
 455         return S_OK;
 456     }
 457
 458     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IMediaSeeking) &&
 459         !IsEqualIID(riid, &IID_IVideoWindow) && !IsEqualIID(riid, &IID_IBasicAudio))
 460         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 461
 462     return E_NOINTERFACE;
 463 }
 464
 465 static ULONG WINAPI AsyncReader_Release(IBaseFilter * iface)
 466 {
 467     AsyncReader *This = impl_from_IBaseFilter(iface);
 468     ULONG refCount = BaseFilterImpl_Release(iface);
 469
 470     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 471
 472     if (!refCount)
 473     {
 474         if (This->pOutputPin)
 475         {
 476             IPin *pConnectedTo;
 477             if(SUCCEEDED(IPin_ConnectedTo(This->pOutputPin, &pConnectedTo)))
 478             {
 479                 IPin_Disconnect(pConnectedTo);
 480                 IPin_Release(pConnectedTo);
 481             }
 482             IPin_Disconnect(This->pOutputPin);
 483             IPin_Release(This->pOutputPin);
 484         }
 485         CoTaskMemFree(This->pszFileName);
 486         if (This->pmt)
 487             FreeMediaType(This->pmt);
 488         CoTaskMemFree(This);
 489         return 0;
 490     }
 491     else
 492         return refCount;
 493 }
 494
 495 /** IMediaFilter methods **/
 496
 497 static HRESULT WINAPI AsyncReader_Stop(IBaseFilter * iface)
 498 {
 499     AsyncReader *This = impl_from_IBaseFilter(iface);
 500
 501     TRACE("()\n");
 502
 503     This->filter.state = State_Stopped;
 504
 505     return S_OK;
 506 }
 507
 508 static HRESULT WINAPI AsyncReader_Pause(IBaseFilter * iface)
 509 {
 510     AsyncReader *This = impl_from_IBaseFilter(iface);
 511
 512     TRACE("()\n");
 513
 514     This->filter.state = State_Paused;
 515
 516     return S_OK;
 517 }
 518
 519 static HRESULT WINAPI AsyncReader_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
 520 {
 521     AsyncReader *This = impl_from_IBaseFilter(iface);
 522
 523     TRACE("(%x%08x)\n", (ULONG)(tStart >> 32), (ULONG)tStart);
 524
 525     This->filter.state = State_Running;
 526
 527     return S_OK;
 528 }
 529
 530 /** IBaseFilter methods **/
 531
 532 static HRESULT WINAPI AsyncReader_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
 533 {
 534     AsyncReader *This = impl_from_IBaseFilter(iface);
 535     TRACE("(%s, %p)\n", debugstr_w(Id), ppPin);
 536
 537     if (!Id || !ppPin)
 538         return E_POINTER;
 539
 540     if (strcmpW(Id, wszOutputPinName))
 541     {
 542         *ppPin = NULL;
 543         return VFW_E_NOT_FOUND;
 544     }
 545
 546     *ppPin = This->pOutputPin;
 547     IPin_AddRef(*ppPin);
 548     return S_OK;
 549 }
 550
 551 static const IBaseFilterVtbl AsyncReader_Vtbl =
 552 {
 553     AsyncReader_QueryInterface,
 554     BaseFilterImpl_AddRef,
 555     AsyncReader_Release,
 556     BaseFilterImpl_GetClassID,
 557     AsyncReader_Stop,
 558     AsyncReader_Pause,
 559     AsyncReader_Run,
 560     BaseFilterImpl_GetState,
 561     BaseFilterImpl_SetSyncSource,
 562     BaseFilterImpl_GetSyncSource,
 563     BaseFilterImpl_EnumPins,
 564     AsyncReader_FindPin,
 565     BaseFilterImpl_QueryFilterInfo,
 566     BaseFilterImpl_JoinFilterGraph,
 567     BaseFilterImpl_QueryVendorInfo
 568 };
 569
 570 static HRESULT WINAPI FileSource_QueryInterface(IFileSourceFilter * iface, REFIID riid, LPVOID * ppv)
 571 {
 572     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 573
 574     return IBaseFilter_QueryInterface(&This->filter.IBaseFilter_iface, riid, ppv);
 575 }
 576
 577 static ULONG WINAPI FileSource_AddRef(IFileSourceFilter * iface)
 578 {
 579     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 580
 581     return IBaseFilter_AddRef(&This->filter.IBaseFilter_iface);
 582 }
 583
 584 static ULONG WINAPI FileSource_Release(IFileSourceFilter * iface)
 585 {
 586     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 587
 588     return IBaseFilter_Release(&This->filter.IBaseFilter_iface);
 589 }
 590
 591 static HRESULT WINAPI FileSource_Load(IFileSourceFilter * iface, LPCOLESTR pszFileName, const AM_MEDIA_TYPE * pmt)
 592 {
 593     HRESULT hr;
 594     HANDLE hFile;
 595     IAsyncReader * pReader = NULL;
 596     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 597
 598     TRACE("(%s, %p)\n", debugstr_w(pszFileName), pmt);
 599
 600     /* open file */
 601     /* FIXME: check the sharing values that native uses */
 602     hFile = CreateFileW(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
 603
 604     if (hFile == INVALID_HANDLE_VALUE)
 605     {
 606         return HRESULT_FROM_WIN32(GetLastError());
 607     }
 608
 609     /* create pin */
 610     hr = FileAsyncReader_Construct(hFile, &This->filter.IBaseFilter_iface, &This->filter.csFilter, &This->pOutputPin);
 611     BaseFilterImpl_IncrementPinVersion(&This->filter);
 612
 613     if (SUCCEEDED(hr))
 614         hr = IPin_QueryInterface(This->pOutputPin, &IID_IAsyncReader, (LPVOID *)&pReader);
 615
 616     /* store file name & media type */
 617     if (SUCCEEDED(hr))
 618     {
 619         CoTaskMemFree(This->pszFileName);
 620         if (This->pmt)
 621             FreeMediaType(This->pmt);
 622
 623         This->pszFileName = CoTaskMemAlloc((strlenW(pszFileName) + 1) * sizeof(WCHAR));
 624         strcpyW(This->pszFileName, pszFileName);
 625
 626         This->pmt = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE));
 627         if (!pmt)
 628         {
 629             This->pmt->bFixedSizeSamples = TRUE;
 630             This->pmt->bTemporalCompression = FALSE;
 631             This->pmt->cbFormat = 0;
 632             This->pmt->pbFormat = NULL;
 633             This->pmt->pUnk = NULL;
 634             This->pmt->lSampleSize = 0;
 635             This->pmt->formattype = FORMAT_None;
 636             hr = GetClassMediaFile(pReader, pszFileName, &This->pmt->majortype, &This->pmt->subtype, NULL);
 637             if (FAILED(hr))
 638             {
 639                 CoTaskMemFree(This->pmt);
 640                 This->pmt = NULL;
 641             }
 642         }
 643         else
 644             CopyMediaType(This->pmt, pmt);
 645     }
 646
 647     if (pReader)
 648         IAsyncReader_Release(pReader);
 649
 650     if (FAILED(hr))
 651     {
 652         if (This->pOutputPin)
 653         {
 654             IPin_Release(This->pOutputPin);
 655             This->pOutputPin = NULL;
 656         }
 657
 658         CoTaskMemFree(This->pszFileName);
 659         if (This->pmt)
 660             FreeMediaType(This->pmt);
 661         This->pszFileName = NULL;
 662         This->pmt = NULL;
 663
 664         CloseHandle(hFile);
 665     }
 666
 667     /* FIXME: check return codes */
 668     return hr;
 669 }
 670
 671 static HRESULT WINAPI FileSource_GetCurFile(IFileSourceFilter * iface, LPOLESTR * ppszFileName, AM_MEDIA_TYPE * pmt)
 672 {
 673     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 674
 675     TRACE("(%p, %p)\n", ppszFileName, pmt);
 676
 677     if (!ppszFileName)
 678         return E_POINTER;
 679
 680     /* copy file name & media type if available, otherwise clear the outputs */
 681     if (This->pszFileName)
 682     {
 683         *ppszFileName = CoTaskMemAlloc((strlenW(This->pszFileName) + 1) * sizeof(WCHAR));
 684         strcpyW(*ppszFileName, This->pszFileName);
 685     }
 686     else
 687         *ppszFileName = NULL;
 688
 689     if (pmt)
 690     {
 691         if (This->pmt)
 692             CopyMediaType(pmt, This->pmt);
 693         else
 694             ZeroMemory(pmt, sizeof(*pmt));
 695     }
 696
 697     return S_OK;
 698 }
 699
 700 static const IFileSourceFilterVtbl FileSource_Vtbl =
 701 {
 702     FileSource_QueryInterface,
 703     FileSource_AddRef,
 704     FileSource_Release,
 705     FileSource_Load,
 706     FileSource_GetCurFile
 707 };
 708
 709
 710 /* the dwUserData passed back to user */
 711 typedef struct DATAREQUEST
 712 {
 713     IMediaSample * pSample; /* sample passed to us by user */
 714     DWORD_PTR dwUserData; /* user data passed to us */
 715     OVERLAPPED ovl; /* our overlapped structure */
 716 } DATAREQUEST;
 717
 718 typedef struct FileAsyncReader
 719 {
 720     BaseOutputPin pin;
 721     IAsyncReader IAsyncReader_iface;
 722
 723     ALLOCATOR_PROPERTIES allocProps;
 724     HANDLE hFile;
 725     BOOL bFlushing;
 726     /* Why would you need more? Every sample has its own handle */
 727     LONG queued_number;
 728     LONG samples;
 729     LONG oldest_sample;
 730     CRITICAL_SECTION csList; /* critical section to prevent concurrency issues */
 731     DATAREQUEST *sample_list;
 732
 733     /* Have a handle for every sample, and then one more as flushing handle */
 734     HANDLE *handle_list;
 735 } FileAsyncReader;
 736
 737 static inline FileAsyncReader *impl_from_IPin(IPin *iface)
 738 {
 739     return CONTAINING_RECORD(iface, FileAsyncReader, pin.pin.IPin_iface);
 740 }
 741
 742 static inline FileAsyncReader *impl_from_BasePin(BasePin *iface)
 743 {
 744     return CONTAINING_RECORD(iface, FileAsyncReader, pin.pin);
 745 }
 746
 747 static inline FileAsyncReader *impl_from_BaseOutputPin(BaseOutputPin *iface)
 748 {
 749     return CONTAINING_RECORD(iface, FileAsyncReader, pin);
 750 }
 751
 752 static inline BaseOutputPin *impl_BaseOututPin_from_BasePin(BasePin *iface)
 753 {
 754     return CONTAINING_RECORD(iface, BaseOutputPin, pin);
 755 }
 756
 757 static inline FileAsyncReader *impl_from_IAsyncReader(IAsyncReader *iface)
 758 {
 759     return CONTAINING_RECORD(iface, FileAsyncReader, IAsyncReader_iface);
 760 }
 761
 762 static HRESULT WINAPI FileAsyncReaderPin_QueryAccept(IPin *iface, const AM_MEDIA_TYPE *pmt)
 763 {
 764     FileAsyncReader *This = impl_from_IPin(iface);
 765     AM_MEDIA_TYPE *pmt_filter = impl_from_IBaseFilter(This->pin.pin.pinInfo.pFilter)->pmt;
 766
 767     FIXME("(%p, %p)\n", iface, pmt);
 768
 769     if (IsEqualGUID(&pmt->majortype, &pmt_filter->majortype) &&
 770         IsEqualGUID(&pmt->subtype, &pmt_filter->subtype) &&
 771         IsEqualGUID(&pmt->formattype, &FORMAT_None))
 772         return S_OK;
 773
 774     return S_FALSE;
 775 }
 776
 777 static HRESULT WINAPI FileAsyncReaderPin_GetMediaType(BasePin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
 778 {
 779     FileAsyncReader *This = impl_from_BasePin(iface);
 780     if (iPosition < 0)
 781         return E_INVALIDARG;
 782     if (iPosition > 0)
 783         return VFW_S_NO_MORE_ITEMS;
 784     CopyMediaType(pmt, impl_from_IBaseFilter(This->pin.pin.pinInfo.pFilter)->pmt);
 785     return S_OK;
 786 }
 787
 788 /* overridden pin functions */
 789
 790 static HRESULT WINAPI FileAsyncReaderPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 791 {
 792     FileAsyncReader *This = impl_from_IPin(iface);
 793     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 794
 795     *ppv = NULL;
 796
 797     if (IsEqualIID(riid, &IID_IUnknown))
 798         *ppv = This;
 799     else if (IsEqualIID(riid, &IID_IPin))
 800         *ppv = This;
 801     else if (IsEqualIID(riid, &IID_IAsyncReader))
 802         *ppv = &This->IAsyncReader_iface;
 803
 804     if (*ppv)
 805     {
 806         IUnknown_AddRef((IUnknown *)(*ppv));
 807         return S_OK;
 808     }
 809
 810     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IMediaSeeking))
 811         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 812
 813     return E_NOINTERFACE;
 814 }
 815
 816 static ULONG WINAPI FileAsyncReaderPin_Release(IPin * iface)
 817 {
 818     FileAsyncReader *This = impl_from_IPin(iface);
 819     ULONG refCount = InterlockedDecrement(&This->pin.pin.refCount);
 820     int x;
 821
 822     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 823
 824     if (!refCount)
 825     {
 826         CoTaskMemFree(This->sample_list);
 827         if (This->handle_list)
 828         {
 829             for (x = 0; x <= This->samples; ++x)
 830                 CloseHandle(This->handle_list[x]);
 831             CoTaskMemFree(This->handle_list);
 832         }
 833         CloseHandle(This->hFile);
 834         This->csList.DebugInfo->Spare[0] = 0;
 835         DeleteCriticalSection(&This->csList);
 836         CoTaskMemFree(This);
 837         return 0;
 838     }
 839     return refCount;
 840 }
 841
 842 static const IPinVtbl FileAsyncReaderPin_Vtbl =
 843 {
 844     FileAsyncReaderPin_QueryInterface,
 845     BasePinImpl_AddRef,
 846     FileAsyncReaderPin_Release,
 847     BaseOutputPinImpl_Connect,
 848     BaseOutputPinImpl_ReceiveConnection,
 849     BasePinImpl_Disconnect,
 850     BasePinImpl_ConnectedTo,
 851     BasePinImpl_ConnectionMediaType,
 852     BasePinImpl_QueryPinInfo,
 853     BasePinImpl_QueryDirection,
 854     BasePinImpl_QueryId,
 855     FileAsyncReaderPin_QueryAccept,
 856     BasePinImpl_EnumMediaTypes,
 857     BasePinImpl_QueryInternalConnections,
 858     BaseOutputPinImpl_EndOfStream,
 859     BaseOutputPinImpl_BeginFlush,
 860     BaseOutputPinImpl_EndFlush,
 861     BasePinImpl_NewSegment
 862 };
 863
 864 /* Function called as a helper to IPin_Connect */
 865 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 866 /* this differs from standard OutputPin_AttemptConnection only in that it
 867  * doesn't need the IMemInputPin interface on the receiving pin */
 868 static HRESULT WINAPI FileAsyncReaderPin_AttemptConnection(BasePin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 869 {
 870     BaseOutputPin *This = impl_BaseOututPin_from_BasePin(iface);
 871     HRESULT hr;
 872
 873     TRACE("(%p, %p)\n", pReceivePin, pmt);
 874     dump_AM_MEDIA_TYPE(pmt);
 875
 876     /* FIXME: call queryacceptproc */
 877
 878     This->pin.pConnectedTo = pReceivePin;
 879     IPin_AddRef(pReceivePin);
 880     CopyMediaType(&This->pin.mtCurrent, pmt);
 881
 882     hr = IPin_ReceiveConnection(pReceivePin, &iface->IPin_iface, pmt);
 883
 884     if (FAILED(hr))
 885     {
 886         IPin_Release(This->pin.pConnectedTo);
 887         This->pin.pConnectedTo = NULL;
 888         FreeMediaType(&This->pin.mtCurrent);
 889     }
 890
 891     TRACE(" -- %x\n", hr);
 892     return hr;
 893 }
 894
 895 static HRESULT WINAPI FileAsyncReaderPin_DecideBufferSize(BaseOutputPin *iface, IMemAllocator *pAlloc, ALLOCATOR_PROPERTIES *ppropInputRequest)
 896 {
 897     FileAsyncReader *This = impl_from_BaseOutputPin(iface);
 898     ALLOCATOR_PROPERTIES actual;
 899
 900     if (ppropInputRequest->cbAlign && ppropInputRequest->cbAlign != This->allocProps.cbAlign)
 901         FIXME("Requested Buffer cbAlign mismatch %i,%i\n",This->allocProps.cbAlign, ppropInputRequest->cbAlign);
 902     if (ppropInputRequest->cbPrefix)
 903         FIXME("Requested Buffer cbPrefix mismatch %i,%i\n",This->allocProps.cbPrefix, ppropInputRequest->cbPrefix);
 904     if (ppropInputRequest->cbBuffer)
 905         FIXME("Requested Buffer cbBuffer mismatch %i,%i\n",This->allocProps.cbBuffer, ppropInputRequest->cbBuffer);
 906     if (ppropInputRequest->cBuffers)
 907         FIXME("Requested Buffer cBuffers mismatch %i,%i\n",This->allocProps.cBuffers, ppropInputRequest->cBuffers);
 908
 909     return IMemAllocator_SetProperties(pAlloc, &This->allocProps, &actual);
 910 }
 911
 912 static const BaseOutputPinFuncTable output_BaseOutputFuncTable = {
 913     {
 914         NULL,
 915         FileAsyncReaderPin_AttemptConnection,
 916         BasePinImpl_GetMediaTypeVersion,
 917         FileAsyncReaderPin_GetMediaType
 918     },
 919     FileAsyncReaderPin_DecideBufferSize,
 920     BaseOutputPinImpl_DecideAllocator,
 921     BaseOutputPinImpl_BreakConnect
 922 };
 923
 924 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 925 {
 926     PIN_INFO piOutput;
 927     HRESULT hr;
 928
 929     *ppPin = NULL;
 930     piOutput.dir = PINDIR_OUTPUT;
 931     piOutput.pFilter = pBaseFilter;
 932     strcpyW(piOutput.achName, wszOutputPinName);
 933     hr = BaseOutputPin_Construct(&FileAsyncReaderPin_Vtbl, sizeof(FileAsyncReader), &piOutput, &output_BaseOutputFuncTable, pCritSec, ppPin);
 934
 935     if (SUCCEEDED(hr))
 936     {
 937         FileAsyncReader *pPinImpl =  (FileAsyncReader *)*ppPin;
 938         pPinImpl->IAsyncReader_iface.lpVtbl = &FileAsyncReader_Vtbl;
 939         pPinImpl->hFile = hFile;
 940         pPinImpl->bFlushing = FALSE;
 941         pPinImpl->sample_list = NULL;
 942         pPinImpl->handle_list = NULL;
 943         pPinImpl->queued_number = 0;
 944         InitializeCriticalSection(&pPinImpl->csList);
 945         pPinImpl->csList.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FileAsyncReader.csList");
 946     }
 947     return hr;
 948 }
 949
 950 /* IAsyncReader */
 951
 952 static HRESULT WINAPI FileAsyncReader_QueryInterface(IAsyncReader * iface, REFIID riid, LPVOID * ppv)
 953 {
 954     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 955
 956     return IPin_QueryInterface(&This->pin.pin.IPin_iface, riid, ppv);
 957 }
 958
 959 static ULONG WINAPI FileAsyncReader_AddRef(IAsyncReader * iface)
 960 {
 961     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 962
 963     return IPin_AddRef(&This->pin.pin.IPin_iface);
 964 }
 965
 966 static ULONG WINAPI FileAsyncReader_Release(IAsyncReader * iface)
 967 {
 968     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 969
 970     return IPin_Release(&This->pin.pin.IPin_iface);
 971 }
 972
 973 #define DEF_ALIGNMENT 1
 974
 975 static HRESULT WINAPI FileAsyncReader_RequestAllocator(IAsyncReader * iface, IMemAllocator * pPreferred, ALLOCATOR_PROPERTIES * pProps, IMemAllocator ** ppActual)
 976 {
 977     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 978
 979     HRESULT hr = S_OK;
 980
 981     TRACE("(%p, %p, %p)\n", pPreferred, pProps, ppActual);
 982
 983     if (!pProps->cbAlign || (pProps->cbAlign % DEF_ALIGNMENT) != 0)
 984         pProps->cbAlign = DEF_ALIGNMENT;
 985
 986     if (pPreferred)
 987     {
 988         hr = IMemAllocator_SetProperties(pPreferred, pProps, pProps);
 989         /* FIXME: check we are still aligned */
 990         if (SUCCEEDED(hr))
 991         {
 992             IMemAllocator_AddRef(pPreferred);
 993             *ppActual = pPreferred;
 994             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 995             goto done;
 996         }
 997     }
 998
 999     pPreferred = NULL;
1000
1001     hr = CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC, &IID_IMemAllocator, (LPVOID *)&pPreferred);
1002
1003     if (SUCCEEDED(hr))
1004     {
1005         hr = IMemAllocator_SetProperties(pPreferred, pProps, pProps);
1006         /* FIXME: check we are still aligned */
1007         if (SUCCEEDED(hr))
1008         {
1009             *ppActual = pPreferred;
1010             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
1011         }
1012     }
1013
1014 done:
1015     if (SUCCEEDED(hr))
1016     {
1017         CoTaskMemFree(This->sample_list);
1018         if (This->handle_list)
1019         {
1020             int x;
1021             for (x = 0; x <= This->samples; ++x)
1022                 CloseHandle(This->handle_list[x]);
1023             CoTaskMemFree(This->handle_list);
1024         }
1025
1026         This->samples = pProps->cBuffers;
1027         This->oldest_sample = 0;
1028         TRACE("Samples: %u\n", This->samples);
1029         This->sample_list = CoTaskMemAlloc(sizeof(This->sample_list[0]) * pProps->cBuffers);
1030         This->handle_list = CoTaskMemAlloc(sizeof(HANDLE) * pProps->cBuffers * 2);
1031
1032         if (This->sample_list && This->handle_list)
1033         {
1034             int x;
1035             ZeroMemory(This->sample_list, sizeof(This->sample_list[0]) * pProps->cBuffers);
1036             for (x = 0; x < This->samples; ++x)
1037             {
1038                 This->sample_list[x].ovl.hEvent = This->handle_list[x] = CreateEventW(NULL, 0, 0, NULL);
1039                 if (x + 1 < This->samples)
1040                     This->handle_list[This->samples + 1 + x] = This->handle_list[x];
1041             }
1042             This->handle_list[This->samples] = CreateEventW(NULL, 1, 0, NULL);
1043             This->allocProps = *pProps;
1044         }
1045         else
1046         {
1047             hr = E_OUTOFMEMORY;
1048             CoTaskMemFree(This->sample_list);
1049             CoTaskMemFree(This->handle_list);
1050             This->samples = 0;
1051             This->sample_list = NULL;
1052             This->handle_list = NULL;
1053         }
1054     }
1055
1056     if (FAILED(hr))
1057     {
1058         *ppActual = NULL;
1059         if (pPreferred)
1060             IMemAllocator_Release(pPreferred);
1061     }
1062
1063     TRACE("-- %x\n", hr);
1064     return hr;
1065 }
1066
1067 /* we could improve the Request/WaitForNext mechanism by allowing out of order samples.
1068  * however, this would be quite complicated to do and may be a bit error prone */
1069 static HRESULT WINAPI FileAsyncReader_Request(IAsyncReader * iface, IMediaSample * pSample, DWORD_PTR dwUser)
1070 {
1071     HRESULT hr = S_OK;
1072     REFERENCE_TIME Start;
1073     REFERENCE_TIME Stop;
1074     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1075     LPBYTE pBuffer = NULL;
1076
1077     TRACE("(%p, %lx)\n", pSample, dwUser);
1078
1079     if (!pSample)
1080         return E_POINTER;
1081
1082     /* get start and stop positions in bytes */
1083     if (SUCCEEDED(hr))
1084         hr = IMediaSample_GetTime(pSample, &Start, &Stop);
1085
1086     if (SUCCEEDED(hr))
1087         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1088
1089     EnterCriticalSection(&This->csList);
1090     if (This->bFlushing)
1091     {
1092         LeaveCriticalSection(&This->csList);
1093         return VFW_E_WRONG_STATE;
1094     }
1095
1096     if (SUCCEEDED(hr))
1097     {
1098         DWORD dwLength = (DWORD) BYTES_FROM_MEDIATIME(Stop - Start);
1099         DATAREQUEST *pDataRq;
1100         int x;
1101
1102         /* Try to insert above the waiting sample if possible */
1103         for (x = This->oldest_sample; x < This->samples; ++x)
1104         {
1105             if (!This->sample_list[x].pSample)
1106                 break;
1107         }
1108
1109         if (x >= This->samples)
1110             for (x = 0; x < This->oldest_sample; ++x)
1111             {
1112                 if (!This->sample_list[x].pSample)
1113                     break;
1114             }
1115
1116         /* There must be a sample we have found */
1117         assert(x < This->samples);
1118         ++This->queued_number;
1119
1120         pDataRq = This->sample_list + x;
1121
1122         pDataRq->ovl.u.s.Offset = (DWORD) BYTES_FROM_MEDIATIME(Start);
1123         pDataRq->ovl.u.s.OffsetHigh = (DWORD)(BYTES_FROM_MEDIATIME(Start) >> (sizeof(DWORD) * 8));
1124         pDataRq->dwUserData = dwUser;
1125
1126         /* we violate traditional COM rules here by maintaining
1127          * a reference to the sample, but not calling AddRef, but
1128          * that's what MSDN says to do */
1129         pDataRq->pSample = pSample;
1130
1131         /* this is definitely not how it is implemented on Win9x
1132          * as they do not support async reads on files, but it is
1133          * sooo much easier to use this than messing around with threads!
1134          */
1135         if (!ReadFile(This->hFile, pBuffer, dwLength, NULL, &pDataRq->ovl))
1136             hr = HRESULT_FROM_WIN32(GetLastError());
1137
1138         /* ERROR_IO_PENDING is not actually an error since this is what we want! */
1139         if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1140             hr = S_OK;
1141     }
1142
1143     LeaveCriticalSection(&This->csList);
1144
1145     TRACE("-- %x\n", hr);
1146     return hr;
1147 }
1148
1149 static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dwTimeout, IMediaSample ** ppSample, DWORD_PTR * pdwUser)
1150 {
1151     HRESULT hr = S_OK;
1152     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1153     DWORD buffer = ~0;
1154
1155     TRACE("(%u, %p, %p)\n", dwTimeout, ppSample, pdwUser);
1156
1157     *ppSample = NULL;
1158     *pdwUser = 0;
1159
1160     EnterCriticalSection(&This->csList);
1161     if (!This->bFlushing)
1162     {
1163         LONG oldest = This->oldest_sample;
1164
1165         if (!This->queued_number)
1166         {
1167             /* It could be that nothing is queued right now, but that can be fixed */
1168             WARN("Called without samples in queue and not flushing!!\n");
1169         }
1170         LeaveCriticalSection(&This->csList);
1171
1172         /* wait for an object to read, or time out */
1173         buffer = WaitForMultipleObjectsEx(This->samples+1, This->handle_list + oldest, FALSE, dwTimeout, TRUE);
1174
1175         EnterCriticalSection(&This->csList);
1176         if (buffer <= This->samples)
1177         {
1178             /* Re-scale the buffer back to normal */
1179             buffer += oldest;
1180
1181             /* Uh oh, we overshot the flusher handle, renormalize it back to 0..Samples-1 */
1182             if (buffer > This->samples)
1183                 buffer -= This->samples + 1;
1184             assert(buffer <= This->samples);
1185         }
1186
1187         if (buffer >= This->samples)
1188         {
1189             if (buffer != This->samples)
1190             {
1191                 FIXME("Returned: %u (%08x)\n", buffer, GetLastError());
1192                 hr = VFW_E_TIMEOUT;
1193             }
1194             else
1195                 hr = VFW_E_WRONG_STATE;
1196             buffer = ~0;
1197         }
1198         else
1199             --This->queued_number;
1200     }
1201
1202     if (This->bFlushing && buffer == ~0)
1203     {
1204         for (buffer = 0; buffer < This->samples; ++buffer)
1205         {
1206             if (This->sample_list[buffer].pSample)
1207             {
1208                 ResetEvent(This->handle_list[buffer]);
1209                 break;
1210             }
1211         }
1212         if (buffer == This->samples)
1213         {
1214             assert(!This->queued_number);
1215             hr = VFW_E_TIMEOUT;
1216         }
1217         else
1218         {
1219             --This->queued_number;
1220             hr = S_OK;
1221         }
1222     }
1223
1224     if (SUCCEEDED(hr))
1225     {
1226         REFERENCE_TIME rtStart, rtStop;
1227         REFERENCE_TIME rtSampleStart, rtSampleStop;
1228         DATAREQUEST *pDataRq = This->sample_list + buffer;
1229         DWORD dwBytes = 0;
1230
1231         /* get any errors */
1232         if (!This->bFlushing && !GetOverlappedResult(This->hFile, &pDataRq->ovl, &dwBytes, FALSE))
1233             hr = HRESULT_FROM_WIN32(GetLastError());
1234
1235         /* Return the sample no matter what so it can be destroyed */
1236         *ppSample = pDataRq->pSample;
1237         *pdwUser = pDataRq->dwUserData;
1238
1239         if (This->bFlushing)
1240             hr = VFW_E_WRONG_STATE;
1241
1242         if (FAILED(hr))
1243             dwBytes = 0;
1244
1245         /* Set the time on the sample */
1246         IMediaSample_SetActualDataLength(pDataRq->pSample, dwBytes);
1247
1248         rtStart = (DWORD64)pDataRq->ovl.u.s.Offset + ((DWORD64)pDataRq->ovl.u.s.OffsetHigh << 32);
1249         rtStart = MEDIATIME_FROM_BYTES(rtStart);
1250         rtStop = rtStart + MEDIATIME_FROM_BYTES(dwBytes);
1251
1252         IMediaSample_GetTime(pDataRq->pSample, &rtSampleStart, &rtSampleStop);
1253         assert(rtStart == rtSampleStart);
1254         assert(rtStop <= rtSampleStop);
1255
1256         IMediaSample_SetTime(pDataRq->pSample, &rtStart, &rtStop);
1257         assert(rtStart == rtSampleStart);
1258         if (hr == S_OK)
1259             assert(rtStop == rtSampleStop);
1260         else
1261             assert(rtStop == rtStart);
1262
1263         This->sample_list[buffer].pSample = NULL;
1264         assert(This->oldest_sample < This->samples);
1265
1266         if (buffer == This->oldest_sample)
1267         {
1268             LONG x;
1269             for (x = This->oldest_sample + 1; x < This->samples; ++x)
1270                 if (This->sample_list[x].pSample)
1271                     break;
1272             if (x >= This->samples)
1273                 for (x = 0; x < This->oldest_sample; ++x)
1274                     if (This->sample_list[x].pSample)
1275                         break;
1276             if (This->oldest_sample == x)
1277                 /* No samples found, reset to 0 */
1278                 x = 0;
1279             This->oldest_sample = x;
1280         }
1281     }
1282     LeaveCriticalSection(&This->csList);
1283
1284     TRACE("-- %x\n", hr);
1285     return hr;
1286 }
1287
1288 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer);
1289
1290 static HRESULT WINAPI FileAsyncReader_SyncReadAligned(IAsyncReader * iface, IMediaSample * pSample)
1291 {
1292     BYTE * pBuffer;
1293     REFERENCE_TIME tStart;
1294     REFERENCE_TIME tStop;
1295     HRESULT hr;
1296
1297     TRACE("(%p)\n", pSample);
1298
1299     hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
1300
1301     if (SUCCEEDED(hr))
1302         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1303
1304     if (SUCCEEDED(hr))
1305         hr = FileAsyncReader_SyncRead(iface,
1306             BYTES_FROM_MEDIATIME(tStart),
1307             (LONG) BYTES_FROM_MEDIATIME(tStop - tStart),
1308             pBuffer);
1309
1310     TRACE("-- %x\n", hr);
1311     return hr;
1312 }
1313
1314 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer)
1315 {
1316     OVERLAPPED ovl;
1317     HRESULT hr = S_OK;
1318     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1319
1320     TRACE("(%x%08x, %d, %p)\n", (ULONG)(llPosition >> 32), (ULONG)llPosition, lLength, pBuffer);
1321
1322     ZeroMemory(&ovl, sizeof(ovl));
1323
1324     ovl.hEvent = CreateEventW(NULL, 0, 0, NULL);
1325     /* NOTE: llPosition is the actual byte position to start reading from */
1326     ovl.u.s.Offset = (DWORD) llPosition;
1327     ovl.u.s.OffsetHigh = (DWORD) (llPosition >> (sizeof(DWORD) * 8));
1328
1329     if (!ReadFile(This->hFile, pBuffer, lLength, NULL, &ovl))
1330         hr = HRESULT_FROM_WIN32(GetLastError());
1331
1332     if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1333         hr = S_OK;
1334
1335     if (SUCCEEDED(hr))
1336     {
1337         DWORD dwBytesRead;
1338
1339         if (!GetOverlappedResult(This->hFile, &ovl, &dwBytesRead, TRUE))
1340             hr = HRESULT_FROM_WIN32(GetLastError());
1341     }
1342
1343     CloseHandle(ovl.hEvent);
1344
1345     TRACE("-- %x\n", hr);
1346     return hr;
1347 }
1348
1349 static HRESULT WINAPI FileAsyncReader_Length(IAsyncReader * iface, LONGLONG * pTotal, LONGLONG * pAvailable)
1350 {
1351     DWORD dwSizeLow;
1352     DWORD dwSizeHigh;
1353     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1354
1355     TRACE("(%p, %p)\n", pTotal, pAvailable);
1356
1357     if (((dwSizeLow = GetFileSize(This->hFile, &dwSizeHigh)) == -1) &&
1358         (GetLastError() != NO_ERROR))
1359         return HRESULT_FROM_WIN32(GetLastError());
1360
1361     *pTotal = (LONGLONG)dwSizeLow | (LONGLONG)dwSizeHigh << (sizeof(DWORD) * 8);
1362
1363     *pAvailable = *pTotal;
1364
1365     return S_OK;
1366 }
1367
1368 static HRESULT WINAPI FileAsyncReader_BeginFlush(IAsyncReader * iface)
1369 {
1370     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1371
1372     TRACE("()\n");
1373
1374     EnterCriticalSection(&This->csList);
1375     This->bFlushing = TRUE;
1376     CancelIo(This->hFile);
1377     SetEvent(This->handle_list[This->samples]);
1378     LeaveCriticalSection(&This->csList);
1379
1380     return S_OK;
1381 }
1382
1383 static HRESULT WINAPI FileAsyncReader_EndFlush(IAsyncReader * iface)
1384 {
1385     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1386     int x;
1387
1388     TRACE("()\n");
1389
1390     EnterCriticalSection(&This->csList);
1391     ResetEvent(This->handle_list[This->samples]);
1392     This->bFlushing = FALSE;
1393     for (x = 0; x < This->samples; ++x)
1394         assert(!This->sample_list[x].pSample);
1395
1396     LeaveCriticalSection(&This->csList);
1397
1398     return S_OK;
1399 }
1400
1401 static const IAsyncReaderVtbl FileAsyncReader_Vtbl =
1402 {
1403     FileAsyncReader_QueryInterface,
1404     FileAsyncReader_AddRef,
1405     FileAsyncReader_Release,
1406     FileAsyncReader_RequestAllocator,
1407     FileAsyncReader_Request,
1408     FileAsyncReader_WaitForNext,
1409     FileAsyncReader_SyncReadAligned,
1410     FileAsyncReader_SyncRead,
1411     FileAsyncReader_Length,
1412     FileAsyncReader_BeginFlush,
1413     FileAsyncReader_EndFlush,
1414 };
1415
1416
1417 static HRESULT WINAPI AMFilterMiscFlags_QueryInterface(IAMFilterMiscFlags *iface, REFIID riid, void **ppv) {
1418     AsyncReader *This = impl_from_IAMFilterMiscFlags(iface);
1419     return IUnknown_QueryInterface((IUnknown*)This, riid, ppv);
1420 }
1421
1422 static ULONG WINAPI AMFilterMiscFlags_AddRef(IAMFilterMiscFlags *iface) {
1423     AsyncReader *This = impl_from_IAMFilterMiscFlags(iface);
1424     return IUnknown_AddRef((IUnknown*)This);
1425 }
1426
1427 static ULONG WINAPI AMFilterMiscFlags_Release(IAMFilterMiscFlags *iface) {
1428     AsyncReader *This = impl_from_IAMFilterMiscFlags(iface);
1429     return IUnknown_Release((IUnknown*)This);
1430 }
1431
1432 static ULONG WINAPI AMFilterMiscFlags_GetMiscFlags(IAMFilterMiscFlags *iface) {
1433     return AM_FILTER_MISC_FLAGS_IS_SOURCE;
1434 }
1435
1436 static const IAMFilterMiscFlagsVtbl IAMFilterMiscFlags_Vtbl = {
1437     AMFilterMiscFlags_QueryInterface,
1438     AMFilterMiscFlags_AddRef,
1439     AMFilterMiscFlags_Release,
1440     AMFilterMiscFlags_GetMiscFlags
1441 };