reactos/dll/directx/quartz/filesource.c

   1 /*
   2  * File Source Filter
   3  *
   4  * Copyright 2003 Robert Shearman
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define NONAMELESSUNION
  22 #define NONAMELESSSTRUCT
  23
  24 #include "quartz_private.h"
  25
  26 #include "wine/debug.h"
  27 #include "wine/unicode.h"
  28 #include "pin.h"
  29 #include "uuids.h"
  30 #include "vfwmsgs.h"
  31 #include "winbase.h"
  32 #include "winreg.h"
  33 #include "shlwapi.h"
  34 #include <assert.h>
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  37
  38 static const WCHAR wszOutputPinName[] = { 'O','u','t','p','u','t',0 };
  39
  40 typedef struct AsyncReader
  41 {
  42     const IBaseFilterVtbl * lpVtbl;
  43     const IFileSourceFilterVtbl * lpVtblFSF;
  44
  45     LONG refCount;
  46     FILTER_INFO filterInfo;
  47     FILTER_STATE state;
  48     CRITICAL_SECTION csFilter;
  49     DWORD lastpinchange;
  50
  51     IPin * pOutputPin;
  52     LPOLESTR pszFileName;
  53     AM_MEDIA_TYPE * pmt;
  54 } AsyncReader;
  55
  56 static const IBaseFilterVtbl AsyncReader_Vtbl;
  57 static const IFileSourceFilterVtbl FileSource_Vtbl;
  58 static const IAsyncReaderVtbl FileAsyncReader_Vtbl;
  59
  60 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
  61
  62 static inline AsyncReader *impl_from_IFileSourceFilter( IFileSourceFilter *iface )
  63 {
  64     return (AsyncReader *)((char*)iface - FIELD_OFFSET(AsyncReader, lpVtblFSF));
  65 }
  66
  67 static WCHAR const mediatype_name[11] = {
  68     'M', 'e', 'd', 'i', 'a', ' ', 'T', 'y', 'p', 'e', 0 };
  69 static WCHAR const subtype_name[8] = {
  70     'S', 'u', 'b', 't', 'y', 'p', 'e', 0 };
  71
  72 static HRESULT process_extensions(HKEY hkeyExtensions, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType)
  73 {
  74     WCHAR *extension;
  75     LONG l;
  76     HKEY hsub;
  77     WCHAR keying[39];
  78     DWORD size;
  79
  80     if (!pszFileName)
  81         return E_POINTER;
  82
  83     /* Get the part of the name that matters */
  84     extension = PathFindExtensionW(pszFileName);
  85     if (*extension != '.')
  86         return E_FAIL;
  87
  88     l = RegOpenKeyExW(hkeyExtensions, extension, 0, KEY_READ, &hsub);
  89     if (l)
  90         return E_FAIL;
  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     size = sizeof(keying);
  98     if (!l)
  99         l = RegQueryValueExW(hsub, subtype_name, NULL, NULL, (LPBYTE)keying, &size);
 100
 101     if (!l)
 102         CLSIDFromString(keying, minorType);
 103
 104     RegCloseKey(hsub);
 105
 106     if (!l)
 107         return S_OK;
 108     return E_FAIL;
 109 }
 110
 111 static unsigned char byte_from_hex_char(WCHAR wHex)
 112 {
 113     switch (tolowerW(wHex))
 114     {
 115     case '0':
 116     case '1':
 117     case '2':
 118     case '3':
 119     case '4':
 120     case '5':
 121     case '6':
 122     case '7':
 123     case '8':
 124     case '9':
 125         return (wHex - '0') & 0xf;
 126     case 'a':
 127     case 'b':
 128     case 'c':
 129     case 'd':
 130     case 'e':
 131     case 'f':
 132         return (wHex - 'a' + 10) & 0xf;
 133     default:
 134         return 0;
 135     }
 136 }
 137
 138 static HRESULT process_pattern_string(LPCWSTR wszPatternString, IAsyncReader * pReader)
 139 {
 140     ULONG ulOffset;
 141     ULONG ulBytes;
 142     BYTE * pbMask;
 143     BYTE * pbValue;
 144     BYTE * pbFile;
 145     HRESULT hr = S_OK;
 146     ULONG strpos;
 147
 148     TRACE("\t\tPattern string: %s\n", debugstr_w(wszPatternString));
 149
 150     /* format: "offset, bytestocompare, mask, value" */
 151
 152     ulOffset = strtolW(wszPatternString, NULL, 10);
 153
 154     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 155         return E_INVALIDARG;
 156
 157     wszPatternString++; /* skip ',' */
 158
 159     ulBytes = strtolW(wszPatternString, NULL, 10);
 160
 161     pbMask = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 162     pbValue = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, ulBytes);
 163     pbFile = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 164
 165     /* default mask is match everything */
 166     memset(pbMask, 0xFF, ulBytes);
 167
 168     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 169         hr = E_INVALIDARG;
 170
 171     if (hr == S_OK)
 172     {
 173         wszPatternString++; /* skip ',' */
 174         while (!isxdigitW(*wszPatternString) && (*wszPatternString != ',')) wszPatternString++;
 175
 176         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 177         {
 178             if ((strpos % 2) == 1) /* odd numbered position */
 179                 pbMask[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 180             else
 181                 pbMask[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 182         }
 183
 184         if (!(wszPatternString = strchrW(wszPatternString, ',')))
 185             hr = E_INVALIDARG;
 186
 187         wszPatternString++; /* skip ',' */
 188     }
 189
 190     if (hr == S_OK)
 191     {
 192         for ( ; !isxdigitW(*wszPatternString) && (*wszPatternString != ','); wszPatternString++)
 193             ;
 194
 195         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 196         {
 197             if ((strpos % 2) == 1) /* odd numbered position */
 198                 pbValue[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 199             else
 200                 pbValue[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 201         }
 202     }
 203
 204     if (hr == S_OK)
 205         hr = IAsyncReader_SyncRead(pReader, ulOffset, ulBytes, pbFile);
 206
 207     if (hr == S_OK)
 208     {
 209         ULONG i;
 210         for (i = 0; i < ulBytes; i++)
 211             if ((pbFile[i] & pbMask[i]) != pbValue[i])
 212             {
 213                 hr = S_FALSE;
 214                 break;
 215             }
 216     }
 217
 218     HeapFree(GetProcessHeap(), 0, pbMask);
 219     HeapFree(GetProcessHeap(), 0, pbValue);
 220     HeapFree(GetProcessHeap(), 0, pbFile);
 221
 222     /* if we encountered no errors with this string, and there is a following tuple, then we
 223      * have to match that as well to succeed */
 224     if ((hr == S_OK) && (wszPatternString = strchrW(wszPatternString, ',')))
 225         return process_pattern_string(wszPatternString + 1, pReader);
 226     else
 227         return hr;
 228 }
 229
 230 static HRESULT GetClassMediaFile(IAsyncReader * pReader, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType)
 231 {
 232     HKEY hkeyMediaType = NULL;
 233     LONG lRet;
 234     HRESULT hr = S_OK;
 235     BOOL bFound = FALSE;
 236     static const WCHAR wszMediaType[] = {'M','e','d','i','a',' ','T','y','p','e',0};
 237
 238     TRACE("(%p, %s, %p, %p)\n", pReader, debugstr_w(pszFileName), majorType, minorType);
 239
 240     *majorType = GUID_NULL;
 241     *minorType = GUID_NULL;
 242
 243     lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszMediaType, 0, KEY_READ, &hkeyMediaType);
 244     hr = HRESULT_FROM_WIN32(lRet);
 245
 246     if (SUCCEEDED(hr))
 247     {
 248         DWORD indexMajor;
 249
 250         for (indexMajor = 0; !bFound; indexMajor++)
 251         {
 252             HKEY hkeyMajor;
 253             WCHAR wszMajorKeyName[CHARS_IN_GUID];
 254             DWORD dwKeyNameLength = sizeof(wszMajorKeyName) / sizeof(wszMajorKeyName[0]);
 255             static const WCHAR wszExtensions[] = {'E','x','t','e','n','s','i','o','n','s',0};
 256
 257             if (RegEnumKeyExW(hkeyMediaType, indexMajor, wszMajorKeyName, &dwKeyNameLength, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 258                 break;
 259             if (RegOpenKeyExW(hkeyMediaType, wszMajorKeyName, 0, KEY_READ, &hkeyMajor) != ERROR_SUCCESS)
 260                 break;
 261             TRACE("%s\n", debugstr_w(wszMajorKeyName));
 262             if (!strcmpW(wszExtensions, wszMajorKeyName))
 263             {
 264                 if (process_extensions(hkeyMajor, pszFileName, majorType, minorType) == S_OK)
 265                     bFound = TRUE;
 266             }
 267             else
 268             {
 269                 DWORD indexMinor;
 270
 271                 for (indexMinor = 0; !bFound; indexMinor++)
 272                 {
 273                     HKEY hkeyMinor;
 274                     WCHAR wszMinorKeyName[CHARS_IN_GUID];
 275                     DWORD dwMinorKeyNameLen = sizeof(wszMinorKeyName) / sizeof(wszMinorKeyName[0]);
 276                     DWORD maxValueLen;
 277                     DWORD indexValue;
 278
 279                     if (RegEnumKeyExW(hkeyMajor, indexMinor, wszMinorKeyName, &dwMinorKeyNameLen, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 280                         break;
 281
 282                     if (RegOpenKeyExW(hkeyMajor, wszMinorKeyName, 0, KEY_READ, &hkeyMinor) != ERROR_SUCCESS)
 283                         break;
 284
 285                     TRACE("\t%s\n", debugstr_w(wszMinorKeyName));
 286
 287                     if (RegQueryInfoKeyW(hkeyMinor, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &maxValueLen, NULL, NULL) != ERROR_SUCCESS)
 288                         break;
 289
 290                     for (indexValue = 0; !bFound; indexValue++)
 291                     {
 292                         DWORD dwType;
 293                         WCHAR wszValueName[14]; /* longest name we should encounter will be "Source Filter" */
 294                         LPWSTR wszPatternString = HeapAlloc(GetProcessHeap(), 0, maxValueLen);
 295                         DWORD dwValueNameLen = sizeof(wszValueName) / sizeof(wszValueName[0]); /* remember this is in chars */
 296                         DWORD dwDataLen = maxValueLen; /* remember this is in bytes */
 297                         static const WCHAR wszSourceFilter[] = {'S','o','u','r','c','e',' ','F','i','l','t','e','r',0};
 298                         LONG temp;
 299
 300                         if ((temp = RegEnumValueW(hkeyMinor, indexValue, wszValueName, &dwValueNameLen, NULL, &dwType, (LPBYTE)wszPatternString, &dwDataLen)) != ERROR_SUCCESS)
 301                         {
 302                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 303                             break;
 304                         }
 305
 306                         /* if it is not the source filter value */
 307                         if (strcmpW(wszValueName, wszSourceFilter))
 308                         {
 309                             if (process_pattern_string(wszPatternString, pReader) == S_OK)
 310                             {
 311                                 if (SUCCEEDED(CLSIDFromString(wszMajorKeyName, majorType)) &&
 312                                     SUCCEEDED(CLSIDFromString(wszMinorKeyName, minorType)))
 313                                     bFound = TRUE;
 314                             }
 315                         }
 316                         HeapFree(GetProcessHeap(), 0, wszPatternString);
 317                     }
 318                     CloseHandle(hkeyMinor);
 319                 }
 320             }
 321             CloseHandle(hkeyMajor);
 322         }
 323     }
 324     CloseHandle(hkeyMediaType);
 325
 326     if (SUCCEEDED(hr) && !bFound)
 327     {
 328         ERR("Media class not found\n");
 329         hr = E_FAIL;
 330     }
 331     else if (bFound)
 332         TRACE("Found file's class: major = %s, subtype = %s\n", qzdebugstr_guid(majorType), qzdebugstr_guid(minorType));
 333
 334     return hr;
 335 }
 336
 337 HRESULT AsyncReader_create(IUnknown * pUnkOuter, LPVOID * ppv)
 338 {
 339     AsyncReader *pAsyncRead;
 340
 341     if( pUnkOuter )
 342         return CLASS_E_NOAGGREGATION;
 343
 344     pAsyncRead = CoTaskMemAlloc(sizeof(AsyncReader));
 345
 346     if (!pAsyncRead)
 347         return E_OUTOFMEMORY;
 348
 349     pAsyncRead->lpVtbl = &AsyncReader_Vtbl;
 350     pAsyncRead->lpVtblFSF = &FileSource_Vtbl;
 351     pAsyncRead->refCount = 1;
 352     pAsyncRead->filterInfo.achName[0] = '\0';
 353     pAsyncRead->filterInfo.pGraph = NULL;
 354     pAsyncRead->pOutputPin = NULL;
 355     pAsyncRead->lastpinchange = GetTickCount();
 356     pAsyncRead->state = State_Stopped;
 357
 358     InitializeCriticalSection(&pAsyncRead->csFilter);
 359     pAsyncRead->csFilter.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": AsyncReader.csFilter");
 360
 361     pAsyncRead->pszFileName = NULL;
 362     pAsyncRead->pmt = NULL;
 363
 364     *ppv = pAsyncRead;
 365
 366     TRACE("-- created at %p\n", pAsyncRead);
 367
 368     return S_OK;
 369 }
 370
 371 /** IUnknown methods **/
 372
 373 static HRESULT WINAPI AsyncReader_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
 374 {
 375     AsyncReader *This = (AsyncReader *)iface;
 376
 377     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 378
 379     *ppv = NULL;
 380
 381     if (IsEqualIID(riid, &IID_IUnknown))
 382         *ppv = This;
 383     else if (IsEqualIID(riid, &IID_IPersist))
 384         *ppv = This;
 385     else if (IsEqualIID(riid, &IID_IMediaFilter))
 386         *ppv = This;
 387     else if (IsEqualIID(riid, &IID_IBaseFilter))
 388         *ppv = This;
 389     else if (IsEqualIID(riid, &IID_IFileSourceFilter))
 390         *ppv = &This->lpVtblFSF;
 391
 392     if (*ppv)
 393     {
 394         IUnknown_AddRef((IUnknown *)(*ppv));
 395         return S_OK;
 396     }
 397
 398     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IMediaSeeking) &&
 399         !IsEqualIID(riid, &IID_IVideoWindow) && !IsEqualIID(riid, &IID_IBasicAudio))
 400         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 401
 402     return E_NOINTERFACE;
 403 }
 404
 405 static ULONG WINAPI AsyncReader_AddRef(IBaseFilter * iface)
 406 {
 407     AsyncReader *This = (AsyncReader *)iface;
 408     ULONG refCount = InterlockedIncrement(&This->refCount);
 409
 410     TRACE("(%p)->() AddRef from %d\n", This, refCount - 1);
 411
 412     return refCount;
 413 }
 414
 415 static ULONG WINAPI AsyncReader_Release(IBaseFilter * iface)
 416 {
 417     AsyncReader *This = (AsyncReader *)iface;
 418     ULONG refCount = InterlockedDecrement(&This->refCount);
 419
 420     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 421
 422     if (!refCount)
 423     {
 424         if (This->pOutputPin)
 425         {
 426             IPin *pConnectedTo;
 427             if(SUCCEEDED(IPin_ConnectedTo(This->pOutputPin, &pConnectedTo)))
 428             {
 429                 IPin_Disconnect(pConnectedTo);
 430                 IPin_Release(pConnectedTo);
 431             }
 432             IPin_Disconnect(This->pOutputPin);
 433             IPin_Release(This->pOutputPin);
 434         }
 435         This->csFilter.DebugInfo->Spare[0] = 0;
 436         DeleteCriticalSection(&This->csFilter);
 437         This->lpVtbl = NULL;
 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 /** IPersist methods **/
 449
 450 static HRESULT WINAPI AsyncReader_GetClassID(IBaseFilter * iface, CLSID * pClsid)
 451 {
 452     TRACE("(%p)\n", pClsid);
 453
 454     *pClsid = CLSID_AsyncReader;
 455
 456     return S_OK;
 457 }
 458
 459 /** IMediaFilter methods **/
 460
 461 static HRESULT WINAPI AsyncReader_Stop(IBaseFilter * iface)
 462 {
 463     AsyncReader *This = (AsyncReader *)iface;
 464
 465     TRACE("()\n");
 466
 467     This->state = State_Stopped;
 468
 469     return S_OK;
 470 }
 471
 472 static HRESULT WINAPI AsyncReader_Pause(IBaseFilter * iface)
 473 {
 474     AsyncReader *This = (AsyncReader *)iface;
 475
 476     TRACE("()\n");
 477
 478     This->state = State_Paused;
 479
 480     return S_OK;
 481 }
 482
 483 static HRESULT WINAPI AsyncReader_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
 484 {
 485     AsyncReader *This = (AsyncReader *)iface;
 486
 487     TRACE("(%x%08x)\n", (ULONG)(tStart >> 32), (ULONG)tStart);
 488
 489     This->state = State_Running;
 490
 491     return S_OK;
 492 }
 493
 494 static HRESULT WINAPI AsyncReader_GetState(IBaseFilter * iface, DWORD dwMilliSecsTimeout, FILTER_STATE *pState)
 495 {
 496     AsyncReader *This = (AsyncReader *)iface;
 497
 498     TRACE("(%u, %p)\n", dwMilliSecsTimeout, pState);
 499
 500     *pState = This->state;
 501
 502     return S_OK;
 503 }
 504
 505 static HRESULT WINAPI AsyncReader_SetSyncSource(IBaseFilter * iface, IReferenceClock *pClock)
 506 {
 507 /*    AsyncReader *This = (AsyncReader *)iface;*/
 508
 509     TRACE("(%p)\n", pClock);
 510
 511     return S_OK;
 512 }
 513
 514 static HRESULT WINAPI AsyncReader_GetSyncSource(IBaseFilter * iface, IReferenceClock **ppClock)
 515 {
 516 /*    AsyncReader *This = (AsyncReader *)iface;*/
 517
 518     TRACE("(%p)\n", ppClock);
 519
 520     return S_OK;
 521 }
 522
 523 /** IBaseFilter methods **/
 524
 525 static HRESULT AsyncReader_GetPin(IBaseFilter *iface, ULONG pos, IPin **pin, DWORD *lastsynctick)
 526 {
 527     AsyncReader *This = (AsyncReader *)iface;
 528
 529     /* Our pins are almost static, not changing so setting static tick count is ok */
 530     *lastsynctick = This->lastpinchange;
 531
 532     if (pos >= 1 || !This->pOutputPin)
 533         return S_FALSE;
 534
 535     *pin = This->pOutputPin;
 536     IPin_AddRef(*pin);
 537     return S_OK;
 538 }
 539
 540 static HRESULT WINAPI AsyncReader_EnumPins(IBaseFilter * iface, IEnumPins **ppEnum)
 541 {
 542     AsyncReader *This = (AsyncReader *)iface;
 543
 544     TRACE("(%p/%p)->(%p)\n", This, iface, ppEnum);
 545
 546     return IEnumPinsImpl_Construct(ppEnum, AsyncReader_GetPin, iface);
 547 }
 548
 549 static HRESULT WINAPI AsyncReader_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
 550 {
 551     FIXME("(%s, %p)\n", debugstr_w(Id), ppPin);
 552
 553     return E_NOTIMPL;
 554 }
 555
 556 static HRESULT WINAPI AsyncReader_QueryFilterInfo(IBaseFilter * iface, FILTER_INFO *pInfo)
 557 {
 558     AsyncReader *This = (AsyncReader *)iface;
 559
 560     TRACE("(%p)\n", pInfo);
 561
 562     strcpyW(pInfo->achName, This->filterInfo.achName);
 563     pInfo->pGraph = This->filterInfo.pGraph;
 564
 565     if (pInfo->pGraph)
 566         IFilterGraph_AddRef(pInfo->pGraph);
 567
 568     return S_OK;
 569 }
 570
 571 static HRESULT WINAPI AsyncReader_JoinFilterGraph(IBaseFilter * iface, IFilterGraph *pGraph, LPCWSTR pName)
 572 {
 573     AsyncReader *This = (AsyncReader *)iface;
 574
 575     TRACE("(%p, %s)\n", pGraph, debugstr_w(pName));
 576
 577     if (pName)
 578         strcpyW(This->filterInfo.achName, pName);
 579     else
 580         *This->filterInfo.achName = 0;
 581     This->filterInfo.pGraph = pGraph; /* NOTE: do NOT increase ref. count */
 582
 583     return S_OK;
 584 }
 585
 586 static HRESULT WINAPI AsyncReader_QueryVendorInfo(IBaseFilter * iface, LPWSTR *pVendorInfo)
 587 {
 588     FIXME("(%p)\n", pVendorInfo);
 589
 590     return E_NOTIMPL;
 591 }
 592
 593 static const IBaseFilterVtbl AsyncReader_Vtbl =
 594 {
 595     AsyncReader_QueryInterface,
 596     AsyncReader_AddRef,
 597     AsyncReader_Release,
 598     AsyncReader_GetClassID,
 599     AsyncReader_Stop,
 600     AsyncReader_Pause,
 601     AsyncReader_Run,
 602     AsyncReader_GetState,
 603     AsyncReader_SetSyncSource,
 604     AsyncReader_GetSyncSource,
 605     AsyncReader_EnumPins,
 606     AsyncReader_FindPin,
 607     AsyncReader_QueryFilterInfo,
 608     AsyncReader_JoinFilterGraph,
 609     AsyncReader_QueryVendorInfo
 610 };
 611
 612 static HRESULT WINAPI FileSource_QueryInterface(IFileSourceFilter * iface, REFIID riid, LPVOID * ppv)
 613 {
 614     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 615
 616     return IBaseFilter_QueryInterface((IFileSourceFilter*)&This->lpVtbl, riid, ppv);
 617 }
 618
 619 static ULONG WINAPI FileSource_AddRef(IFileSourceFilter * iface)
 620 {
 621     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 622
 623     return IBaseFilter_AddRef((IFileSourceFilter*)&This->lpVtbl);
 624 }
 625
 626 static ULONG WINAPI FileSource_Release(IFileSourceFilter * iface)
 627 {
 628     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 629
 630     return IBaseFilter_Release((IFileSourceFilter*)&This->lpVtbl);
 631 }
 632
 633 static HRESULT WINAPI FileSource_Load(IFileSourceFilter * iface, LPCOLESTR pszFileName, const AM_MEDIA_TYPE * pmt)
 634 {
 635     HRESULT hr;
 636     HANDLE hFile;
 637     IAsyncReader * pReader = NULL;
 638     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 639
 640     TRACE("(%s, %p)\n", debugstr_w(pszFileName), pmt);
 641
 642     /* open file */
 643     /* FIXME: check the sharing values that native uses */
 644     hFile = CreateFileW(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
 645
 646     if (hFile == INVALID_HANDLE_VALUE)
 647     {
 648         return HRESULT_FROM_WIN32(GetLastError());
 649     }
 650
 651     /* create pin */
 652     hr = FileAsyncReader_Construct(hFile, (IBaseFilter *)&This->lpVtbl, &This->csFilter, &This->pOutputPin);
 653     This->lastpinchange = GetTickCount();
 654
 655     if (SUCCEEDED(hr))
 656         hr = IPin_QueryInterface(This->pOutputPin, &IID_IAsyncReader, (LPVOID *)&pReader);
 657
 658     /* store file name & media type */
 659     if (SUCCEEDED(hr))
 660     {
 661         CoTaskMemFree(This->pszFileName);
 662         if (This->pmt)
 663             FreeMediaType(This->pmt);
 664
 665         This->pszFileName = CoTaskMemAlloc((strlenW(pszFileName) + 1) * sizeof(WCHAR));
 666         strcpyW(This->pszFileName, pszFileName);
 667
 668         This->pmt = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE));
 669         if (!pmt)
 670         {
 671             This->pmt->bFixedSizeSamples = TRUE;
 672             This->pmt->bTemporalCompression = FALSE;
 673             This->pmt->cbFormat = 0;
 674             This->pmt->pbFormat = NULL;
 675             This->pmt->pUnk = NULL;
 676             This->pmt->lSampleSize = 0;
 677             This->pmt->formattype = FORMAT_None;
 678             hr = GetClassMediaFile(pReader, pszFileName, &This->pmt->majortype, &This->pmt->subtype);
 679             if (FAILED(hr))
 680             {
 681                 CoTaskMemFree(This->pmt);
 682                 This->pmt = NULL;
 683             }
 684         }
 685         else
 686             CopyMediaType(This->pmt, pmt);
 687     }
 688
 689     if (pReader)
 690         IAsyncReader_Release(pReader);
 691
 692     if (FAILED(hr))
 693     {
 694         if (This->pOutputPin)
 695         {
 696             IPin_Release(This->pOutputPin);
 697             This->pOutputPin = NULL;
 698         }
 699
 700         CoTaskMemFree(This->pszFileName);
 701         if (This->pmt)
 702             FreeMediaType(This->pmt);
 703         This->pszFileName = NULL;
 704         This->pmt = NULL;
 705
 706         CloseHandle(hFile);
 707     }
 708
 709     /* FIXME: check return codes */
 710     return hr;
 711 }
 712
 713 static HRESULT WINAPI FileSource_GetCurFile(IFileSourceFilter * iface, LPOLESTR * ppszFileName, AM_MEDIA_TYPE * pmt)
 714 {
 715     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 716
 717     TRACE("(%p, %p)\n", ppszFileName, pmt);
 718
 719     if (!ppszFileName)
 720         return E_POINTER;
 721
 722     /* copy file name & media type if available, otherwise clear the outputs */
 723     if (This->pszFileName)
 724     {
 725         *ppszFileName = CoTaskMemAlloc((strlenW(This->pszFileName) + 1) * sizeof(WCHAR));
 726         strcpyW(*ppszFileName, This->pszFileName);
 727     }
 728     else
 729         *ppszFileName = NULL;
 730
 731     if (pmt)
 732     {
 733         if (This->pmt)
 734             CopyMediaType(pmt, This->pmt);
 735         else
 736             ZeroMemory(pmt, sizeof(*pmt));
 737     }
 738
 739     return S_OK;
 740 }
 741
 742 static const IFileSourceFilterVtbl FileSource_Vtbl =
 743 {
 744     FileSource_QueryInterface,
 745     FileSource_AddRef,
 746     FileSource_Release,
 747     FileSource_Load,
 748     FileSource_GetCurFile
 749 };
 750
 751
 752 /* the dwUserData passed back to user */
 753 typedef struct DATAREQUEST
 754 {
 755     IMediaSample * pSample; /* sample passed to us by user */
 756     DWORD_PTR dwUserData; /* user data passed to us */
 757     OVERLAPPED ovl; /* our overlapped structure */
 758 } DATAREQUEST;
 759
 760 typedef struct FileAsyncReader
 761 {
 762     OutputPin pin;
 763     const struct IAsyncReaderVtbl * lpVtblAR;
 764
 765     HANDLE hFile;
 766     BOOL bFlushing;
 767     /* Why would you need more? Every sample has its own handle */
 768     LONG queued_number;
 769     LONG samples;
 770     LONG oldest_sample;
 771     CRITICAL_SECTION csList; /* critical section to prevent concurrency issues */
 772     DATAREQUEST *sample_list;
 773
 774     /* Have a handle for every sample, and then one more as flushing handle */
 775     HANDLE *handle_list;
 776 } FileAsyncReader;
 777
 778 static inline FileAsyncReader *impl_from_IAsyncReader( IAsyncReader *iface )
 779 {
 780     return (FileAsyncReader *)((char*)iface - FIELD_OFFSET(FileAsyncReader, lpVtblAR));
 781 }
 782
 783 static HRESULT AcceptProcAFR(LPVOID iface, const AM_MEDIA_TYPE *pmt)
 784 {
 785     AsyncReader *This = iface;
 786
 787     FIXME("(%p, %p)\n", iface, pmt);
 788
 789     if (IsEqualGUID(&pmt->majortype, &This->pmt->majortype) &&
 790         IsEqualGUID(&pmt->subtype, &This->pmt->subtype) &&
 791         IsEqualGUID(&pmt->formattype, &FORMAT_None))
 792         return S_OK;
 793
 794     return S_FALSE;
 795 }
 796
 797 /* overridden pin functions */
 798
 799 static HRESULT WINAPI FileAsyncReaderPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 800 {
 801     FileAsyncReader *This = (FileAsyncReader *)iface;
 802     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 803
 804     *ppv = NULL;
 805
 806     if (IsEqualIID(riid, &IID_IUnknown))
 807         *ppv = This;
 808     else if (IsEqualIID(riid, &IID_IPin))
 809         *ppv = This;
 810     else if (IsEqualIID(riid, &IID_IAsyncReader))
 811         *ppv = &This->lpVtblAR;
 812
 813     if (*ppv)
 814     {
 815         IUnknown_AddRef((IUnknown *)(*ppv));
 816         return S_OK;
 817     }
 818
 819     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IMediaSeeking))
 820         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 821
 822     return E_NOINTERFACE;
 823 }
 824
 825 static ULONG WINAPI FileAsyncReaderPin_Release(IPin * iface)
 826 {
 827     FileAsyncReader *This = (FileAsyncReader *)iface;
 828     ULONG refCount = InterlockedDecrement(&This->pin.pin.refCount);
 829     int x;
 830
 831     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 832
 833     if (!refCount)
 834     {
 835         CoTaskMemFree(This->sample_list);
 836         if (This->handle_list)
 837         {
 838             for (x = 0; x <= This->samples; ++x)
 839                 CloseHandle(This->handle_list[x]);
 840             CoTaskMemFree(This->handle_list);
 841         }
 842         CloseHandle(This->hFile);
 843         This->csList.DebugInfo->Spare[0] = 0;
 844         DeleteCriticalSection(&This->csList);
 845         CoTaskMemFree(This);
 846         return 0;
 847     }
 848     return refCount;
 849 }
 850
 851 static HRESULT WINAPI FileAsyncReaderPin_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum)
 852 {
 853     ENUMMEDIADETAILS emd;
 854     FileAsyncReader *This = (FileAsyncReader *)iface;
 855
 856     TRACE("(%p)\n", ppEnum);
 857
 858     emd.cMediaTypes = 1;
 859     emd.pMediaTypes = ((AsyncReader *)This->pin.pin.pinInfo.pFilter)->pmt;
 860
 861     return IEnumMediaTypesImpl_Construct(&emd, ppEnum);
 862 }
 863
 864 static const IPinVtbl FileAsyncReaderPin_Vtbl =
 865 {
 866     FileAsyncReaderPin_QueryInterface,
 867     IPinImpl_AddRef,
 868     FileAsyncReaderPin_Release,
 869     OutputPin_Connect,
 870     OutputPin_ReceiveConnection,
 871     IPinImpl_Disconnect,
 872     IPinImpl_ConnectedTo,
 873     IPinImpl_ConnectionMediaType,
 874     IPinImpl_QueryPinInfo,
 875     IPinImpl_QueryDirection,
 876     IPinImpl_QueryId,
 877     IPinImpl_QueryAccept,
 878     FileAsyncReaderPin_EnumMediaTypes,
 879     IPinImpl_QueryInternalConnections,
 880     OutputPin_EndOfStream,
 881     OutputPin_BeginFlush,
 882     OutputPin_EndFlush,
 883     OutputPin_NewSegment
 884 };
 885
 886 /* Function called as a helper to IPin_Connect */
 887 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 888 /* this differs from standard OutputPin_ConnectSpecific only in that it
 889  * doesn't need the IMemInputPin interface on the receiving pin */
 890 static HRESULT FileAsyncReaderPin_ConnectSpecific(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 891 {
 892     OutputPin *This = (OutputPin *)iface;
 893     HRESULT hr;
 894
 895     TRACE("(%p, %p)\n", pReceivePin, pmt);
 896     dump_AM_MEDIA_TYPE(pmt);
 897
 898     /* FIXME: call queryacceptproc */
 899
 900     This->pin.pConnectedTo = pReceivePin;
 901     IPin_AddRef(pReceivePin);
 902     CopyMediaType(&This->pin.mtCurrent, pmt);
 903
 904     hr = IPin_ReceiveConnection(pReceivePin, iface, pmt);
 905
 906     if (FAILED(hr))
 907     {
 908         IPin_Release(This->pin.pConnectedTo);
 909         This->pin.pConnectedTo = NULL;
 910         FreeMediaType(&This->pin.mtCurrent);
 911     }
 912
 913     TRACE(" -- %x\n", hr);
 914     return hr;
 915 }
 916
 917 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 918 {
 919     PIN_INFO piOutput;
 920     HRESULT hr;
 921
 922     *ppPin = NULL;
 923     piOutput.dir = PINDIR_OUTPUT;
 924     piOutput.pFilter = pBaseFilter;
 925     strcpyW(piOutput.achName, wszOutputPinName);
 926     hr = OutputPin_Construct(&FileAsyncReaderPin_Vtbl, sizeof(FileAsyncReader), &piOutput, NULL, pBaseFilter, AcceptProcAFR, pCritSec, ppPin);
 927
 928     if (SUCCEEDED(hr))
 929     {
 930         FileAsyncReader *pPinImpl =  (FileAsyncReader *)*ppPin;
 931         pPinImpl->lpVtblAR = &FileAsyncReader_Vtbl;
 932         pPinImpl->hFile = hFile;
 933         pPinImpl->bFlushing = FALSE;
 934         pPinImpl->sample_list = NULL;
 935         pPinImpl->handle_list = NULL;
 936         pPinImpl->queued_number = 0;
 937         pPinImpl->pin.pConnectSpecific = FileAsyncReaderPin_ConnectSpecific;
 938         InitializeCriticalSection(&pPinImpl->csList);
 939         pPinImpl->csList.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FileAsyncReader.csList");
 940     }
 941     return hr;
 942 }
 943
 944 /* IAsyncReader */
 945
 946 static HRESULT WINAPI FileAsyncReader_QueryInterface(IAsyncReader * iface, REFIID riid, LPVOID * ppv)
 947 {
 948     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 949
 950     return IPin_QueryInterface((IPin *)This, riid, ppv);
 951 }
 952
 953 static ULONG WINAPI FileAsyncReader_AddRef(IAsyncReader * iface)
 954 {
 955     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 956
 957     return IPin_AddRef((IPin *)This);
 958 }
 959
 960 static ULONG WINAPI FileAsyncReader_Release(IAsyncReader * iface)
 961 {
 962     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 963
 964     return IPin_Release((IPin *)This);
 965 }
 966
 967 #define DEF_ALIGNMENT 1
 968
 969 static HRESULT WINAPI FileAsyncReader_RequestAllocator(IAsyncReader * iface, IMemAllocator * pPreferred, ALLOCATOR_PROPERTIES * pProps, IMemAllocator ** ppActual)
 970 {
 971     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 972
 973     HRESULT hr = S_OK;
 974
 975     TRACE("(%p, %p, %p)\n", pPreferred, pProps, ppActual);
 976
 977     if (!pProps->cbAlign || (pProps->cbAlign % DEF_ALIGNMENT) != 0)
 978         pProps->cbAlign = DEF_ALIGNMENT;
 979
 980     if (pPreferred)
 981     {
 982         hr = IMemAllocator_SetProperties(pPreferred, pProps, pProps);
 983         /* FIXME: check we are still aligned */
 984         if (SUCCEEDED(hr))
 985         {
 986             IMemAllocator_AddRef(pPreferred);
 987             *ppActual = pPreferred;
 988             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 989             goto done;
 990         }
 991     }
 992
 993     pPreferred = NULL;
 994
 995     hr = CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC, &IID_IMemAllocator, (LPVOID *)&pPreferred);
 996
 997     if (SUCCEEDED(hr))
 998     {
 999         hr = IMemAllocator_SetProperties(pPreferred, pProps, pProps);
1000         /* FIXME: check we are still aligned */
1001         if (SUCCEEDED(hr))
1002         {
1003             *ppActual = pPreferred;
1004             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
1005         }
1006     }
1007
1008 done:
1009     if (SUCCEEDED(hr))
1010     {
1011         CoTaskMemFree(This->sample_list);
1012         if (This->handle_list)
1013         {
1014             int x;
1015             for (x = 0; x <= This->samples; ++x)
1016                 CloseHandle(This->handle_list[x]);
1017             CoTaskMemFree(This->handle_list);
1018         }
1019
1020         This->samples = pProps->cBuffers;
1021         This->oldest_sample = 0;
1022         TRACE("Samples: %u\n", This->samples);
1023         This->sample_list = CoTaskMemAlloc(sizeof(This->sample_list[0]) * pProps->cBuffers);
1024         This->handle_list = CoTaskMemAlloc(sizeof(HANDLE) * pProps->cBuffers * 2);
1025
1026         if (This->sample_list && This->handle_list)
1027         {
1028             int x;
1029             ZeroMemory(This->sample_list, sizeof(This->sample_list[0]) * pProps->cBuffers);
1030             for (x = 0; x < This->samples; ++x)
1031             {
1032                 This->sample_list[x].ovl.hEvent = This->handle_list[x] = CreateEventW(NULL, 0, 0, NULL);
1033                 if (x + 1 < This->samples)
1034                     This->handle_list[This->samples + 1 + x] = This->handle_list[x];
1035             }
1036             This->handle_list[This->samples] = CreateEventW(NULL, 1, 0, NULL);
1037             This->pin.allocProps = *pProps;
1038         }
1039         else
1040         {
1041             hr = E_OUTOFMEMORY;
1042             CoTaskMemFree(This->sample_list);
1043             CoTaskMemFree(This->handle_list);
1044             This->samples = 0;
1045             This->sample_list = NULL;
1046             This->handle_list = NULL;
1047         }
1048     }
1049
1050     if (FAILED(hr))
1051     {
1052         *ppActual = NULL;
1053         if (pPreferred)
1054             IMemAllocator_Release(pPreferred);
1055     }
1056
1057     TRACE("-- %x\n", hr);
1058     return hr;
1059 }
1060
1061 /* we could improve the Request/WaitForNext mechanism by allowing out of order samples.
1062  * however, this would be quite complicated to do and may be a bit error prone */
1063 static HRESULT WINAPI FileAsyncReader_Request(IAsyncReader * iface, IMediaSample * pSample, DWORD_PTR dwUser)
1064 {
1065     HRESULT hr = S_OK;
1066     REFERENCE_TIME Start;
1067     REFERENCE_TIME Stop;
1068     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1069     LPBYTE pBuffer = NULL;
1070
1071     TRACE("(%p, %lx)\n", pSample, dwUser);
1072
1073     if (!pSample)
1074         return E_POINTER;
1075
1076     /* get start and stop positions in bytes */
1077     if (SUCCEEDED(hr))
1078         hr = IMediaSample_GetTime(pSample, &Start, &Stop);
1079
1080     if (SUCCEEDED(hr))
1081         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1082
1083     EnterCriticalSection(&This->csList);
1084     if (This->bFlushing)
1085     {
1086         LeaveCriticalSection(&This->csList);
1087         return VFW_E_WRONG_STATE;
1088     }
1089
1090     if (SUCCEEDED(hr))
1091     {
1092         DWORD dwLength = (DWORD) BYTES_FROM_MEDIATIME(Stop - Start);
1093         DATAREQUEST *pDataRq;
1094         int x;
1095
1096         /* Try to insert above the waiting sample if possible */
1097         for (x = This->oldest_sample; x < This->samples; ++x)
1098         {
1099             if (!This->sample_list[x].pSample)
1100                 break;
1101         }
1102
1103         if (x >= This->samples)
1104             for (x = 0; x < This->oldest_sample; ++x)
1105             {
1106                 if (!This->sample_list[x].pSample)
1107                     break;
1108             }
1109
1110         /* There must be a sample we have found */
1111         assert(x < This->samples);
1112         ++This->queued_number;
1113
1114         pDataRq = This->sample_list + x;
1115
1116         pDataRq->ovl.Offset = (DWORD) BYTES_FROM_MEDIATIME(Start);
1117         pDataRq->ovl.OffsetHigh = (DWORD)(BYTES_FROM_MEDIATIME(Start) >> (sizeof(DWORD) * 8));
1118         pDataRq->dwUserData = dwUser;
1119
1120         /* we violate traditional COM rules here by maintaining
1121          * a reference to the sample, but not calling AddRef, but
1122          * that's what MSDN says to do */
1123         pDataRq->pSample = pSample;
1124
1125         /* this is definitely not how it is implemented on Win9x
1126          * as they do not support async reads on files, but it is
1127          * sooo much easier to use this than messing around with threads!
1128          */
1129         if (!ReadFile(This->hFile, pBuffer, dwLength, NULL, &pDataRq->ovl))
1130             hr = HRESULT_FROM_WIN32(GetLastError());
1131
1132         /* ERROR_IO_PENDING is not actually an error since this is what we want! */
1133         if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1134             hr = S_OK;
1135     }
1136
1137     LeaveCriticalSection(&This->csList);
1138
1139     TRACE("-- %x\n", hr);
1140     return hr;
1141 }
1142
1143 static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dwTimeout, IMediaSample ** ppSample, DWORD_PTR * pdwUser)
1144 {
1145     HRESULT hr = S_OK;
1146     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1147     DWORD buffer = ~0;
1148
1149     TRACE("(%u, %p, %p)\n", dwTimeout, ppSample, pdwUser);
1150
1151     *ppSample = NULL;
1152     *pdwUser = 0;
1153
1154     EnterCriticalSection(&This->csList);
1155     if (!This->bFlushing)
1156     {
1157         LONG oldest = This->oldest_sample;
1158
1159         if (!This->queued_number)
1160         {
1161             /* It could be that nothing is queued right now, but that can be fixed */
1162             WARN("Called without samples in queue and not flushing!!\n");
1163         }
1164         LeaveCriticalSection(&This->csList);
1165
1166         /* wait for an object to read, or time out */
1167         buffer = WaitForMultipleObjectsEx(This->samples+1, This->handle_list + oldest, FALSE, dwTimeout, TRUE);
1168
1169         EnterCriticalSection(&This->csList);
1170         if (buffer <= This->samples)
1171         {
1172             /* Re-scale the buffer back to normal */
1173             buffer += oldest;
1174
1175             /* Uh oh, we overshot the flusher handle, renormalize it back to 0..Samples-1 */
1176             if (buffer > This->samples)
1177                 buffer -= This->samples + 1;
1178             assert(buffer <= This->samples);
1179         }
1180
1181         if (buffer >= This->samples)
1182         {
1183             if (buffer != This->samples)
1184             {
1185                 FIXME("Returned: %u (%08x)\n", buffer, GetLastError());
1186                 hr = VFW_E_TIMEOUT;
1187             }
1188             else
1189                 hr = VFW_E_WRONG_STATE;
1190             buffer = ~0;
1191         }
1192         else
1193             --This->queued_number;
1194     }
1195
1196     if (This->bFlushing && buffer == ~0)
1197     {
1198         for (buffer = 0; buffer < This->samples; ++buffer)
1199         {
1200             if (This->sample_list[buffer].pSample)
1201             {
1202                 ResetEvent(This->handle_list[buffer]);
1203                 break;
1204             }
1205         }
1206         if (buffer == This->samples)
1207         {
1208             assert(!This->queued_number);
1209             hr = VFW_E_TIMEOUT;
1210         }
1211         else
1212         {
1213             --This->queued_number;
1214             hr = S_OK;
1215         }
1216     }
1217
1218     if (SUCCEEDED(hr))
1219     {
1220         REFERENCE_TIME rtStart, rtStop;
1221         REFERENCE_TIME rtSampleStart, rtSampleStop;
1222         DATAREQUEST *pDataRq = This->sample_list + buffer;
1223         DWORD dwBytes = 0;
1224
1225         /* get any errors */
1226         if (!This->bFlushing && !GetOverlappedResult(This->hFile, &pDataRq->ovl, &dwBytes, FALSE))
1227             hr = HRESULT_FROM_WIN32(GetLastError());
1228
1229         /* Return the sample no matter what so it can be destroyed */
1230         *ppSample = pDataRq->pSample;
1231         *pdwUser = pDataRq->dwUserData;
1232
1233         if (This->bFlushing)
1234             hr = VFW_E_WRONG_STATE;
1235
1236         if (FAILED(hr))
1237             dwBytes = 0;
1238
1239         /* Set the time on the sample */
1240         IMediaSample_SetActualDataLength(pDataRq->pSample, dwBytes);
1241
1242         rtStart = (DWORD64)pDataRq->ovl.Offset + ((DWORD64)pDataRq->ovl.OffsetHigh << 32);
1243         rtStart = MEDIATIME_FROM_BYTES(rtStart);
1244         rtStop = rtStart + MEDIATIME_FROM_BYTES(dwBytes);
1245
1246         IMediaSample_GetTime(pDataRq->pSample, &rtSampleStart, &rtSampleStop);
1247         assert(rtStart == rtSampleStart);
1248         assert(rtStop <= rtSampleStop);
1249
1250         IMediaSample_SetTime(pDataRq->pSample, &rtStart, &rtStop);
1251         assert(rtStart == rtSampleStart);
1252         if (hr == S_OK)
1253             assert(rtStop == rtSampleStop);
1254         else
1255             assert(rtStop == rtStart);
1256
1257         This->sample_list[buffer].pSample = NULL;
1258         assert(This->oldest_sample < This->samples);
1259
1260         if (buffer == This->oldest_sample)
1261         {
1262             LONG x;
1263             for (x = This->oldest_sample + 1; x < This->samples; ++x)
1264                 if (This->sample_list[x].pSample)
1265                     break;
1266             if (x >= This->samples)
1267                 for (x = 0; x < This->oldest_sample; ++x)
1268                     if (This->sample_list[x].pSample)
1269                         break;
1270             if (This->oldest_sample == x)
1271                 /* No samples found, reset to 0 */
1272                 x = 0;
1273             This->oldest_sample = x;
1274         }
1275     }
1276     LeaveCriticalSection(&This->csList);
1277
1278     TRACE("-- %x\n", hr);
1279     return hr;
1280 }
1281
1282 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer);
1283
1284 static HRESULT WINAPI FileAsyncReader_SyncReadAligned(IAsyncReader * iface, IMediaSample * pSample)
1285 {
1286     BYTE * pBuffer;
1287     REFERENCE_TIME tStart;
1288     REFERENCE_TIME tStop;
1289     HRESULT hr;
1290
1291     TRACE("(%p)\n", pSample);
1292
1293     hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
1294
1295     if (SUCCEEDED(hr))
1296         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1297
1298     if (SUCCEEDED(hr))
1299         hr = FileAsyncReader_SyncRead(iface,
1300             BYTES_FROM_MEDIATIME(tStart),
1301             (LONG) BYTES_FROM_MEDIATIME(tStop - tStart),
1302             pBuffer);
1303
1304     TRACE("-- %x\n", hr);
1305     return hr;
1306 }
1307
1308 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer)
1309 {
1310     OVERLAPPED ovl;
1311     HRESULT hr = S_OK;
1312     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1313
1314     TRACE("(%x%08x, %d, %p)\n", (ULONG)(llPosition >> 32), (ULONG)llPosition, lLength, pBuffer);
1315
1316     ZeroMemory(&ovl, sizeof(ovl));
1317
1318     ovl.hEvent = CreateEventW(NULL, 0, 0, NULL);
1319     /* NOTE: llPosition is the actual byte position to start reading from */
1320     ovl.Offset = (DWORD) llPosition;
1321     ovl.OffsetHigh = (DWORD) (llPosition >> (sizeof(DWORD) * 8));
1322
1323     if (!ReadFile(This->hFile, pBuffer, lLength, NULL, &ovl))
1324         hr = HRESULT_FROM_WIN32(GetLastError());
1325
1326     if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1327         hr = S_OK;
1328
1329     if (SUCCEEDED(hr))
1330     {
1331         DWORD dwBytesRead;
1332
1333         if (!GetOverlappedResult(This->hFile, &ovl, &dwBytesRead, TRUE))
1334             hr = HRESULT_FROM_WIN32(GetLastError());
1335     }
1336
1337     CloseHandle(ovl.hEvent);
1338
1339     TRACE("-- %x\n", hr);
1340     return hr;
1341 }
1342
1343 static HRESULT WINAPI FileAsyncReader_Length(IAsyncReader * iface, LONGLONG * pTotal, LONGLONG * pAvailable)
1344 {
1345     DWORD dwSizeLow;
1346     DWORD dwSizeHigh;
1347     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1348
1349     TRACE("(%p, %p)\n", pTotal, pAvailable);
1350
1351     if (((dwSizeLow = GetFileSize(This->hFile, &dwSizeHigh)) == -1) &&
1352         (GetLastError() != NO_ERROR))
1353         return HRESULT_FROM_WIN32(GetLastError());
1354
1355     *pTotal = (LONGLONG)dwSizeLow | (LONGLONG)dwSizeHigh << (sizeof(DWORD) * 8);
1356
1357     *pAvailable = *pTotal;
1358
1359     return S_OK;
1360 }
1361
1362 static HRESULT WINAPI FileAsyncReader_BeginFlush(IAsyncReader * iface)
1363 {
1364     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1365
1366     TRACE("()\n");
1367
1368     EnterCriticalSection(&This->csList);
1369     This->bFlushing = TRUE;
1370     CancelIo(This->hFile);
1371     SetEvent(This->handle_list[This->samples]);
1372     LeaveCriticalSection(&This->csList);
1373
1374     return S_OK;
1375 }
1376
1377 static HRESULT WINAPI FileAsyncReader_EndFlush(IAsyncReader * iface)
1378 {
1379     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1380     int x;
1381
1382     TRACE("()\n");
1383
1384     EnterCriticalSection(&This->csList);
1385     ResetEvent(This->handle_list[This->samples]);
1386     This->bFlushing = FALSE;
1387     for (x = 0; x < This->samples; ++x)
1388         assert(!This->sample_list[x].pSample);
1389
1390     LeaveCriticalSection(&This->csList);
1391
1392     return S_OK;
1393 }
1394
1395 static const IAsyncReaderVtbl FileAsyncReader_Vtbl =
1396 {
1397     FileAsyncReader_QueryInterface,
1398     FileAsyncReader_AddRef,
1399     FileAsyncReader_Release,
1400     FileAsyncReader_RequestAllocator,
1401     FileAsyncReader_Request,
1402     FileAsyncReader_WaitForNext,
1403     FileAsyncReader_SyncReadAligned,
1404     FileAsyncReader_SyncRead,
1405     FileAsyncReader_Length,
1406     FileAsyncReader_BeginFlush,
1407     FileAsyncReader_EndFlush,
1408 };