dlls/quartz/filesource.c

   1 /*
   2  * File Source Filter
   3  *
   4  * Copyright 2003 Robert Shearman
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define NONAMELESSUNION
  22 #define NONAMELESSSTRUCT
  23
  24 #include "quartz_private.h"
  25
  26 #include "wine/debug.h"
  27 #include "wine/unicode.h"
  28 #include "pin.h"
  29 #include "uuids.h"
  30 #include "vfwmsgs.h"
  31 #include "winbase.h"
  32 #include "winreg.h"
  33 #include "shlwapi.h"
  34 #include <assert.h>
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  37
  38 static const WCHAR wszOutputPinName[] = { 'O','u','t','p','u','t',0 };
  39
  40 typedef struct AsyncReader
  41 {
  42     const IBaseFilterVtbl * lpVtbl;
  43     const IFileSourceFilterVtbl * lpVtblFSF;
  44
  45     LONG refCount;
  46     FILTER_INFO filterInfo;
  47     FILTER_STATE state;
  48     CRITICAL_SECTION csFilter;
  49     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) && !IsEqualIID(riid, &IID_IVideoWindow))
 399         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 400
 401     return E_NOINTERFACE;
 402 }
 403
 404 static ULONG WINAPI AsyncReader_AddRef(IBaseFilter * iface)
 405 {
 406     AsyncReader *This = (AsyncReader *)iface;
 407     ULONG refCount = InterlockedIncrement(&This->refCount);
 408
 409     TRACE("(%p)->() AddRef from %d\n", This, refCount - 1);
 410
 411     return refCount;
 412 }
 413
 414 static ULONG WINAPI AsyncReader_Release(IBaseFilter * iface)
 415 {
 416     AsyncReader *This = (AsyncReader *)iface;
 417     ULONG refCount = InterlockedDecrement(&This->refCount);
 418
 419     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 420
 421     if (!refCount)
 422     {
 423         if (This->pOutputPin)
 424         {
 425             IPin *pConnectedTo;
 426             if(SUCCEEDED(IPin_ConnectedTo(This->pOutputPin, &pConnectedTo)))
 427             {
 428                 IPin_Disconnect(pConnectedTo);
 429                 IPin_Release(pConnectedTo);
 430             }
 431             IPin_Disconnect(This->pOutputPin);
 432             IPin_Release(This->pOutputPin);
 433         }
 434         This->csFilter.DebugInfo->Spare[0] = 0;
 435         DeleteCriticalSection(&This->csFilter);
 436         This->lpVtbl = NULL;
 437         CoTaskMemFree(This->pszFileName);
 438         if (This->pmt)
 439             FreeMediaType(This->pmt);
 440         CoTaskMemFree(This);
 441         return 0;
 442     }
 443     else
 444         return refCount;
 445 }
 446
 447 /** IPersist methods **/
 448
 449 static HRESULT WINAPI AsyncReader_GetClassID(IBaseFilter * iface, CLSID * pClsid)
 450 {
 451     TRACE("(%p)\n", pClsid);
 452
 453     *pClsid = CLSID_AsyncReader;
 454
 455     return S_OK;
 456 }
 457
 458 /** IMediaFilter methods **/
 459
 460 static HRESULT WINAPI AsyncReader_Stop(IBaseFilter * iface)
 461 {
 462     AsyncReader *This = (AsyncReader *)iface;
 463
 464     TRACE("()\n");
 465
 466     This->state = State_Stopped;
 467
 468     return S_OK;
 469 }
 470
 471 static HRESULT WINAPI AsyncReader_Pause(IBaseFilter * iface)
 472 {
 473     AsyncReader *This = (AsyncReader *)iface;
 474
 475     TRACE("()\n");
 476
 477     This->state = State_Paused;
 478
 479     return S_OK;
 480 }
 481
 482 static HRESULT WINAPI AsyncReader_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
 483 {
 484     AsyncReader *This = (AsyncReader *)iface;
 485
 486     TRACE("(%x%08x)\n", (ULONG)(tStart >> 32), (ULONG)tStart);
 487
 488     This->state = State_Running;
 489
 490     return S_OK;
 491 }
 492
 493 static HRESULT WINAPI AsyncReader_GetState(IBaseFilter * iface, DWORD dwMilliSecsTimeout, FILTER_STATE *pState)
 494 {
 495     AsyncReader *This = (AsyncReader *)iface;
 496
 497     TRACE("(%u, %p)\n", dwMilliSecsTimeout, pState);
 498
 499     *pState = This->state;
 500
 501     return S_OK;
 502 }
 503
 504 static HRESULT WINAPI AsyncReader_SetSyncSource(IBaseFilter * iface, IReferenceClock *pClock)
 505 {
 506 /*    AsyncReader *This = (AsyncReader *)iface;*/
 507
 508     TRACE("(%p)\n", pClock);
 509
 510     return S_OK;
 511 }
 512
 513 static HRESULT WINAPI AsyncReader_GetSyncSource(IBaseFilter * iface, IReferenceClock **ppClock)
 514 {
 515 /*    AsyncReader *This = (AsyncReader *)iface;*/
 516
 517     TRACE("(%p)\n", ppClock);
 518
 519     return S_OK;
 520 }
 521
 522 /** IBaseFilter methods **/
 523
 524 static HRESULT AsyncReader_GetPin(IBaseFilter *iface, ULONG pos, IPin **pin, DWORD *lastsynctick)
 525 {
 526     AsyncReader *This = (AsyncReader *)iface;
 527
 528     /* Our pins are almost static, not changing so setting static tick count is ok */
 529     *lastsynctick = This->lastpinchange;
 530
 531     if (pos >= 1 || !This->pOutputPin)
 532         return S_FALSE;
 533
 534     *pin = This->pOutputPin;
 535     IPin_AddRef(*pin);
 536     return S_OK;
 537 }
 538
 539 static HRESULT WINAPI AsyncReader_EnumPins(IBaseFilter * iface, IEnumPins **ppEnum)
 540 {
 541     AsyncReader *This = (AsyncReader *)iface;
 542
 543     TRACE("(%p/%p)->(%p)\n", This, iface, ppEnum);
 544
 545     return IEnumPinsImpl_Construct(ppEnum, AsyncReader_GetPin, iface);
 546 }
 547
 548 static HRESULT WINAPI AsyncReader_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
 549 {
 550     FIXME("(%s, %p)\n", debugstr_w(Id), ppPin);
 551
 552     return E_NOTIMPL;
 553 }
 554
 555 static HRESULT WINAPI AsyncReader_QueryFilterInfo(IBaseFilter * iface, FILTER_INFO *pInfo)
 556 {
 557     AsyncReader *This = (AsyncReader *)iface;
 558
 559     TRACE("(%p)\n", pInfo);
 560
 561     strcpyW(pInfo->achName, This->filterInfo.achName);
 562     pInfo->pGraph = This->filterInfo.pGraph;
 563
 564     if (pInfo->pGraph)
 565         IFilterGraph_AddRef(pInfo->pGraph);
 566
 567     return S_OK;
 568 }
 569
 570 static HRESULT WINAPI AsyncReader_JoinFilterGraph(IBaseFilter * iface, IFilterGraph *pGraph, LPCWSTR pName)
 571 {
 572     AsyncReader *This = (AsyncReader *)iface;
 573
 574     TRACE("(%p, %s)\n", pGraph, debugstr_w(pName));
 575
 576     if (pName)
 577         strcpyW(This->filterInfo.achName, pName);
 578     else
 579         *This->filterInfo.achName = 0;
 580     This->filterInfo.pGraph = pGraph; /* NOTE: do NOT increase ref. count */
 581
 582     return S_OK;
 583 }
 584
 585 static HRESULT WINAPI AsyncReader_QueryVendorInfo(IBaseFilter * iface, LPWSTR *pVendorInfo)
 586 {
 587     FIXME("(%p)\n", pVendorInfo);
 588
 589     return E_NOTIMPL;
 590 }
 591
 592 static const IBaseFilterVtbl AsyncReader_Vtbl =
 593 {
 594     AsyncReader_QueryInterface,
 595     AsyncReader_AddRef,
 596     AsyncReader_Release,
 597     AsyncReader_GetClassID,
 598     AsyncReader_Stop,
 599     AsyncReader_Pause,
 600     AsyncReader_Run,
 601     AsyncReader_GetState,
 602     AsyncReader_SetSyncSource,
 603     AsyncReader_GetSyncSource,
 604     AsyncReader_EnumPins,
 605     AsyncReader_FindPin,
 606     AsyncReader_QueryFilterInfo,
 607     AsyncReader_JoinFilterGraph,
 608     AsyncReader_QueryVendorInfo
 609 };
 610
 611 static HRESULT WINAPI FileSource_QueryInterface(IFileSourceFilter * iface, REFIID riid, LPVOID * ppv)
 612 {
 613     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 614
 615     return IBaseFilter_QueryInterface((IFileSourceFilter*)&This->lpVtbl, riid, ppv);
 616 }
 617
 618 static ULONG WINAPI FileSource_AddRef(IFileSourceFilter * iface)
 619 {
 620     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 621
 622     return IBaseFilter_AddRef((IFileSourceFilter*)&This->lpVtbl);
 623 }
 624
 625 static ULONG WINAPI FileSource_Release(IFileSourceFilter * iface)
 626 {
 627     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 628
 629     return IBaseFilter_Release((IFileSourceFilter*)&This->lpVtbl);
 630 }
 631
 632 static HRESULT WINAPI FileSource_Load(IFileSourceFilter * iface, LPCOLESTR pszFileName, const AM_MEDIA_TYPE * pmt)
 633 {
 634     HRESULT hr;
 635     HANDLE hFile;
 636     IAsyncReader * pReader = NULL;
 637     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 638
 639     TRACE("(%s, %p)\n", debugstr_w(pszFileName), pmt);
 640
 641     /* open file */
 642     /* FIXME: check the sharing values that native uses */
 643     hFile = CreateFileW(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
 644
 645     if (hFile == INVALID_HANDLE_VALUE)
 646     {
 647         return HRESULT_FROM_WIN32(GetLastError());
 648     }
 649
 650     /* create pin */
 651     hr = FileAsyncReader_Construct(hFile, (IBaseFilter *)&This->lpVtbl, &This->csFilter, &This->pOutputPin);
 652     This->lastpinchange = GetTickCount();
 653
 654     if (SUCCEEDED(hr))
 655         hr = IPin_QueryInterface(This->pOutputPin, &IID_IAsyncReader, (LPVOID *)&pReader);
 656
 657     /* store file name & media type */
 658     if (SUCCEEDED(hr))
 659     {
 660         CoTaskMemFree(This->pszFileName);
 661         if (This->pmt)
 662             FreeMediaType(This->pmt);
 663
 664         This->pszFileName = CoTaskMemAlloc((strlenW(pszFileName) + 1) * sizeof(WCHAR));
 665         strcpyW(This->pszFileName, pszFileName);
 666
 667         This->pmt = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE));
 668         if (!pmt)
 669         {
 670             This->pmt->bFixedSizeSamples = TRUE;
 671             This->pmt->bTemporalCompression = FALSE;
 672             This->pmt->cbFormat = 0;
 673             This->pmt->pbFormat = NULL;
 674             This->pmt->pUnk = NULL;
 675             This->pmt->lSampleSize = 0;
 676             This->pmt->formattype = FORMAT_None;
 677             hr = GetClassMediaFile(pReader, pszFileName, &This->pmt->majortype, &This->pmt->subtype);
 678             if (FAILED(hr))
 679             {
 680                 CoTaskMemFree(This->pmt);
 681                 This->pmt = NULL;
 682             }
 683         }
 684         else
 685             CopyMediaType(This->pmt, pmt);
 686     }
 687
 688     if (pReader)
 689         IAsyncReader_Release(pReader);
 690
 691     if (FAILED(hr))
 692     {
 693         if (This->pOutputPin)
 694         {
 695             IPin_Release(This->pOutputPin);
 696             This->pOutputPin = NULL;
 697         }
 698
 699         CoTaskMemFree(This->pszFileName);
 700         if (This->pmt)
 701             FreeMediaType(This->pmt);
 702         This->pszFileName = NULL;
 703         This->pmt = NULL;
 704
 705         CloseHandle(hFile);
 706     }
 707
 708     /* FIXME: check return codes */
 709     return hr;
 710 }
 711
 712 static HRESULT WINAPI FileSource_GetCurFile(IFileSourceFilter * iface, LPOLESTR * ppszFileName, AM_MEDIA_TYPE * pmt)
 713 {
 714     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 715
 716     TRACE("(%p, %p)\n", ppszFileName, pmt);
 717
 718     if (!ppszFileName)
 719         return E_POINTER;
 720
 721     /* copy file name & media type if available, otherwise clear the outputs */
 722     if (This->pszFileName)
 723     {
 724         *ppszFileName = CoTaskMemAlloc((strlenW(This->pszFileName) + 1) * sizeof(WCHAR));
 725         strcpyW(*ppszFileName, This->pszFileName);
 726     }
 727     else
 728         *ppszFileName = NULL;
 729
 730     if (pmt)
 731     {
 732         if (This->pmt)
 733             CopyMediaType(pmt, This->pmt);
 734         else
 735             ZeroMemory(pmt, sizeof(*pmt));
 736     }
 737
 738     return S_OK;
 739 }
 740
 741 static const IFileSourceFilterVtbl FileSource_Vtbl =
 742 {
 743     FileSource_QueryInterface,
 744     FileSource_AddRef,
 745     FileSource_Release,
 746     FileSource_Load,
 747     FileSource_GetCurFile
 748 };
 749
 750
 751 /* the dwUserData passed back to user */
 752 typedef struct DATAREQUEST
 753 {
 754     IMediaSample * pSample; /* sample passed to us by user */
 755     DWORD_PTR dwUserData; /* user data passed to us */
 756     OVERLAPPED ovl; /* our overlapped structure */
 757 } DATAREQUEST;
 758
 759 typedef struct FileAsyncReader
 760 {
 761     OutputPin pin;
 762     const struct IAsyncReaderVtbl * lpVtblAR;
 763
 764     HANDLE hFile;
 765     BOOL bFlushing;
 766     /* Why would you need more? Every sample has its own handle */
 767     LONG queued_number;
 768     LONG samples;
 769     LONG oldest_sample;
 770     CRITICAL_SECTION csList; /* critical section to prevent concurrency issues */
 771     DATAREQUEST *sample_list;
 772
 773     /* Have a handle for every sample, and then one more as flushing handle */
 774     HANDLE *handle_list;
 775 } FileAsyncReader;
 776
 777 static inline FileAsyncReader *impl_from_IAsyncReader( IAsyncReader *iface )
 778 {
 779     return (FileAsyncReader *)((char*)iface - FIELD_OFFSET(FileAsyncReader, lpVtblAR));
 780 }
 781
 782 static HRESULT AcceptProcAFR(LPVOID iface, const AM_MEDIA_TYPE *pmt)
 783 {
 784     AsyncReader *This = iface;
 785
 786     FIXME("(%p, %p)\n", iface, pmt);
 787
 788     if (IsEqualGUID(&pmt->majortype, &This->pmt->majortype) &&
 789         IsEqualGUID(&pmt->subtype, &This->pmt->subtype) &&
 790         IsEqualGUID(&pmt->formattype, &FORMAT_None))
 791         return S_OK;
 792
 793     return S_FALSE;
 794 }
 795
 796 /* overridden pin functions */
 797
 798 static HRESULT WINAPI FileAsyncReaderPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 799 {
 800     FileAsyncReader *This = (FileAsyncReader *)iface;
 801     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 802
 803     *ppv = NULL;
 804
 805     if (IsEqualIID(riid, &IID_IUnknown))
 806         *ppv = This;
 807     else if (IsEqualIID(riid, &IID_IPin))
 808         *ppv = This;
 809     else if (IsEqualIID(riid, &IID_IAsyncReader))
 810         *ppv = &This->lpVtblAR;
 811
 812     if (*ppv)
 813     {
 814         IUnknown_AddRef((IUnknown *)(*ppv));
 815         return S_OK;
 816     }
 817
 818     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IMediaSeeking))
 819         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 820
 821     return E_NOINTERFACE;
 822 }
 823
 824 static ULONG WINAPI FileAsyncReaderPin_Release(IPin * iface)
 825 {
 826     FileAsyncReader *This = (FileAsyncReader *)iface;
 827     ULONG refCount = InterlockedDecrement(&This->pin.pin.refCount);
 828     int x;
 829
 830     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 831
 832     if (!refCount)
 833     {
 834         CoTaskMemFree(This->sample_list);
 835         if (This->handle_list)
 836         {
 837             for (x = 0; x <= This->samples; ++x)
 838                 CloseHandle(This->handle_list[x]);
 839             CoTaskMemFree(This->handle_list);
 840         }
 841         CloseHandle(This->hFile);
 842         This->csList.DebugInfo->Spare[0] = 0;
 843         DeleteCriticalSection(&This->csList);
 844         CoTaskMemFree(This);
 845         return 0;
 846     }
 847     return refCount;
 848 }
 849
 850 static HRESULT WINAPI FileAsyncReaderPin_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum)
 851 {
 852     ENUMMEDIADETAILS emd;
 853     FileAsyncReader *This = (FileAsyncReader *)iface;
 854
 855     TRACE("(%p)\n", ppEnum);
 856
 857     emd.cMediaTypes = 1;
 858     emd.pMediaTypes = ((AsyncReader *)This->pin.pin.pinInfo.pFilter)->pmt;
 859
 860     return IEnumMediaTypesImpl_Construct(&emd, ppEnum);
 861 }
 862
 863 static const IPinVtbl FileAsyncReaderPin_Vtbl =
 864 {
 865     FileAsyncReaderPin_QueryInterface,
 866     IPinImpl_AddRef,
 867     FileAsyncReaderPin_Release,
 868     OutputPin_Connect,
 869     OutputPin_ReceiveConnection,
 870     IPinImpl_Disconnect,
 871     IPinImpl_ConnectedTo,
 872     IPinImpl_ConnectionMediaType,
 873     IPinImpl_QueryPinInfo,
 874     IPinImpl_QueryDirection,
 875     IPinImpl_QueryId,
 876     IPinImpl_QueryAccept,
 877     FileAsyncReaderPin_EnumMediaTypes,
 878     IPinImpl_QueryInternalConnections,
 879     OutputPin_EndOfStream,
 880     OutputPin_BeginFlush,
 881     OutputPin_EndFlush,
 882     OutputPin_NewSegment
 883 };
 884
 885 /* Function called as a helper to IPin_Connect */
 886 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 887 /* this differs from standard OutputPin_ConnectSpecific only in that it
 888  * doesn't need the IMemInputPin interface on the receiving pin */
 889 static HRESULT FileAsyncReaderPin_ConnectSpecific(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 890 {
 891     OutputPin *This = (OutputPin *)iface;
 892     HRESULT hr;
 893
 894     TRACE("(%p, %p)\n", pReceivePin, pmt);
 895     dump_AM_MEDIA_TYPE(pmt);
 896
 897     /* FIXME: call queryacceptproc */
 898
 899     This->pin.pConnectedTo = pReceivePin;
 900     IPin_AddRef(pReceivePin);
 901     CopyMediaType(&This->pin.mtCurrent, pmt);
 902
 903     hr = IPin_ReceiveConnection(pReceivePin, iface, pmt);
 904
 905     if (FAILED(hr))
 906     {
 907         IPin_Release(This->pin.pConnectedTo);
 908         This->pin.pConnectedTo = NULL;
 909         FreeMediaType(&This->pin.mtCurrent);
 910     }
 911
 912     TRACE(" -- %x\n", hr);
 913     return hr;
 914 }
 915
 916 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 917 {
 918     PIN_INFO piOutput;
 919     HRESULT hr;
 920
 921     *ppPin = NULL;
 922     piOutput.dir = PINDIR_OUTPUT;
 923     piOutput.pFilter = pBaseFilter;
 924     strcpyW(piOutput.achName, wszOutputPinName);
 925     hr = OutputPin_Construct(&FileAsyncReaderPin_Vtbl, sizeof(FileAsyncReader), &piOutput, NULL, pBaseFilter, AcceptProcAFR, pCritSec, ppPin);
 926
 927     if (SUCCEEDED(hr))
 928     {
 929         FileAsyncReader *pPinImpl =  (FileAsyncReader *)*ppPin;
 930         pPinImpl->lpVtblAR = &FileAsyncReader_Vtbl;
 931         pPinImpl->hFile = hFile;
 932         pPinImpl->bFlushing = FALSE;
 933         pPinImpl->sample_list = NULL;
 934         pPinImpl->handle_list = NULL;
 935         pPinImpl->queued_number = 0;
 936         pPinImpl->pin.pConnectSpecific = FileAsyncReaderPin_ConnectSpecific;
 937         InitializeCriticalSection(&pPinImpl->csList);
 938         pPinImpl->csList.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FileAsyncReader.csList");
 939     }
 940     return hr;
 941 }
 942
 943 /* IAsyncReader */
 944
 945 static HRESULT WINAPI FileAsyncReader_QueryInterface(IAsyncReader * iface, REFIID riid, LPVOID * ppv)
 946 {
 947     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 948
 949     return IPin_QueryInterface((IPin *)This, riid, ppv);
 950 }
 951
 952 static ULONG WINAPI FileAsyncReader_AddRef(IAsyncReader * iface)
 953 {
 954     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 955
 956     return IPin_AddRef((IPin *)This);
 957 }
 958
 959 static ULONG WINAPI FileAsyncReader_Release(IAsyncReader * iface)
 960 {
 961     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 962
 963     return IPin_Release((IPin *)This);
 964 }
 965
 966 #define DEF_ALIGNMENT 1
 967
 968 static HRESULT WINAPI FileAsyncReader_RequestAllocator(IAsyncReader * iface, IMemAllocator * pPreferred, ALLOCATOR_PROPERTIES * pProps, IMemAllocator ** ppActual)
 969 {
 970     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 971
 972     HRESULT hr = S_OK;
 973
 974     TRACE("(%p, %p, %p)\n", pPreferred, pProps, ppActual);
 975
 976     if (!pProps->cbAlign || (pProps->cbAlign % DEF_ALIGNMENT) != 0)
 977         pProps->cbAlign = DEF_ALIGNMENT;
 978
 979     if (pPreferred)
 980     {
 981         hr = IMemAllocator_SetProperties(pPreferred, pProps, pProps);
 982         /* FIXME: check we are still aligned */
 983         if (SUCCEEDED(hr))
 984         {
 985             IMemAllocator_AddRef(pPreferred);
 986             *ppActual = pPreferred;
 987             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
 988             goto done;
 989         }
 990     }
 991
 992     pPreferred = NULL;
 993
 994     hr = CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC, &IID_IMemAllocator, (LPVOID *)&pPreferred);
 995
 996     if (SUCCEEDED(hr))
 997     {
 998         hr = IMemAllocator_SetProperties(pPreferred, pProps, pProps);
 999         /* FIXME: check we are still aligned */
1000         if (SUCCEEDED(hr))
1001         {
1002             *ppActual = pPreferred;
1003             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
1004         }
1005     }
1006
1007 done:
1008     if (SUCCEEDED(hr))
1009     {
1010         CoTaskMemFree(This->sample_list);
1011         if (This->handle_list)
1012         {
1013             int x;
1014             for (x = 0; x <= This->samples; ++x)
1015                 CloseHandle(This->handle_list[x]);
1016             CoTaskMemFree(This->handle_list);
1017         }
1018
1019         This->samples = pProps->cBuffers;
1020         This->oldest_sample = 0;
1021         TRACE("Samples: %u\n", This->samples);
1022         This->sample_list = CoTaskMemAlloc(sizeof(This->sample_list[0]) * pProps->cBuffers);
1023         This->handle_list = CoTaskMemAlloc(sizeof(HANDLE) * pProps->cBuffers * 2);
1024
1025         if (This->sample_list && This->handle_list)
1026         {
1027             int x;
1028             ZeroMemory(This->sample_list, sizeof(This->sample_list[0]) * pProps->cBuffers);
1029             for (x = 0; x < This->samples; ++x)
1030             {
1031                 This->sample_list[x].ovl.hEvent = This->handle_list[x] = CreateEventW(NULL, 0, 0, NULL);
1032                 if (x + 1 < This->samples)
1033                     This->handle_list[This->samples + 1 + x] = This->handle_list[x];
1034             }
1035             This->handle_list[This->samples] = CreateEventW(NULL, 1, 0, NULL);
1036             This->pin.allocProps = *pProps;
1037         }
1038         else
1039         {
1040             hr = E_OUTOFMEMORY;
1041             CoTaskMemFree(This->sample_list);
1042             CoTaskMemFree(This->handle_list);
1043             This->samples = 0;
1044             This->sample_list = NULL;
1045             This->handle_list = NULL;
1046         }
1047     }
1048
1049     if (FAILED(hr))
1050     {
1051         *ppActual = NULL;
1052         if (pPreferred)
1053             IMemAllocator_Release(pPreferred);
1054     }
1055
1056     TRACE("-- %x\n", hr);
1057     return hr;
1058 }
1059
1060 /* we could improve the Request/WaitForNext mechanism by allowing out of order samples.
1061  * however, this would be quite complicated to do and may be a bit error prone */
1062 static HRESULT WINAPI FileAsyncReader_Request(IAsyncReader * iface, IMediaSample * pSample, DWORD_PTR dwUser)
1063 {
1064     HRESULT hr = S_OK;
1065     REFERENCE_TIME Start;
1066     REFERENCE_TIME Stop;
1067     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1068     LPBYTE pBuffer = NULL;
1069
1070     TRACE("(%p, %lx)\n", pSample, dwUser);
1071
1072     if (!pSample)
1073         return E_POINTER;
1074
1075     /* get start and stop positions in bytes */
1076     if (SUCCEEDED(hr))
1077         hr = IMediaSample_GetTime(pSample, &Start, &Stop);
1078
1079     if (SUCCEEDED(hr))
1080         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1081
1082     EnterCriticalSection(&This->csList);
1083     if (This->bFlushing)
1084     {
1085         LeaveCriticalSection(&This->csList);
1086         return VFW_E_WRONG_STATE;
1087     }
1088
1089     if (SUCCEEDED(hr))
1090     {
1091         DWORD dwLength = (DWORD) BYTES_FROM_MEDIATIME(Stop - Start);
1092         DATAREQUEST *pDataRq;
1093         int x;
1094
1095         /* Try to insert above the waiting sample if possible */
1096         for (x = This->oldest_sample; x < This->samples; ++x)
1097         {
1098             if (!This->sample_list[x].pSample)
1099                 break;
1100         }
1101
1102         if (x >= This->samples)
1103             for (x = 0; x < This->oldest_sample; ++x)
1104             {
1105                 if (!This->sample_list[x].pSample)
1106                     break;
1107             }
1108
1109         /* There must be a sample we have found */
1110         assert(x < This->samples);
1111         ++This->queued_number;
1112
1113         pDataRq = This->sample_list + x;
1114
1115         pDataRq->ovl.u.s.Offset = (DWORD) BYTES_FROM_MEDIATIME(Start);
1116         pDataRq->ovl.u.s.OffsetHigh = (DWORD)(BYTES_FROM_MEDIATIME(Start) >> (sizeof(DWORD) * 8));
1117         pDataRq->dwUserData = dwUser;
1118
1119         /* we violate traditional COM rules here by maintaining
1120          * a reference to the sample, but not calling AddRef, but
1121          * that's what MSDN says to do */
1122         pDataRq->pSample = pSample;
1123
1124         /* this is definitely not how it is implemented on Win9x
1125          * as they do not support async reads on files, but it is
1126          * sooo much easier to use this than messing around with threads!
1127          */
1128         if (!ReadFile(This->hFile, pBuffer, dwLength, NULL, &pDataRq->ovl))
1129             hr = HRESULT_FROM_WIN32(GetLastError());
1130
1131         /* ERROR_IO_PENDING is not actually an error since this is what we want! */
1132         if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1133             hr = S_OK;
1134     }
1135
1136     LeaveCriticalSection(&This->csList);
1137
1138     TRACE("-- %x\n", hr);
1139     return hr;
1140 }
1141
1142 static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dwTimeout, IMediaSample ** ppSample, DWORD_PTR * pdwUser)
1143 {
1144     HRESULT hr = S_OK;
1145     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1146     DWORD buffer = ~0;
1147
1148     TRACE("(%u, %p, %p)\n", dwTimeout, ppSample, pdwUser);
1149
1150     *ppSample = NULL;
1151     *pdwUser = 0;
1152
1153     EnterCriticalSection(&This->csList);
1154     if (!This->bFlushing)
1155     {
1156         LONG oldest = This->oldest_sample;
1157
1158         if (!This->queued_number)
1159         {
1160             /* It could be that nothing is queued right now, but that can be fixed */
1161             WARN("Called without samples in queue and not flushing!!\n");
1162         }
1163         LeaveCriticalSection(&This->csList);
1164
1165         /* wait for an object to read, or time out */
1166         buffer = WaitForMultipleObjectsEx(This->samples+1, This->handle_list + oldest, FALSE, dwTimeout, TRUE);
1167
1168         EnterCriticalSection(&This->csList);
1169         if (buffer <= This->samples)
1170         {
1171             /* Re-scale the buffer back to normal */
1172             buffer += oldest;
1173
1174             /* Uh oh, we overshot the flusher handle, renormalize it back to 0..Samples-1 */
1175             if (buffer > This->samples)
1176                 buffer -= This->samples + 1;
1177             assert(buffer <= This->samples);
1178         }
1179
1180         if (buffer >= This->samples)
1181         {
1182             if (buffer != This->samples)
1183             {
1184                 FIXME("Returned: %u (%08x)\n", buffer, GetLastError());
1185                 hr = VFW_E_TIMEOUT;
1186             }
1187             else
1188                 hr = VFW_E_WRONG_STATE;
1189             buffer = ~0;
1190         }
1191         else
1192             --This->queued_number;
1193     }
1194
1195     if (This->bFlushing && buffer == ~0)
1196     {
1197         for (buffer = 0; buffer < This->samples; ++buffer)
1198         {
1199             if (This->sample_list[buffer].pSample)
1200             {
1201                 ResetEvent(This->handle_list[buffer]);
1202                 break;
1203             }
1204         }
1205         if (buffer == This->samples)
1206         {
1207             assert(!This->queued_number);
1208             hr = VFW_E_TIMEOUT;
1209         }
1210         else
1211         {
1212             --This->queued_number;
1213             hr = S_OK;
1214         }
1215     }
1216
1217     if (SUCCEEDED(hr))
1218     {
1219         REFERENCE_TIME rtStart, rtStop;
1220         REFERENCE_TIME rtSampleStart, rtSampleStop;
1221         DATAREQUEST *pDataRq = This->sample_list + buffer;
1222         DWORD dwBytes = 0;
1223
1224         /* get any errors */
1225         if (!This->bFlushing && !GetOverlappedResult(This->hFile, &pDataRq->ovl, &dwBytes, FALSE))
1226             hr = HRESULT_FROM_WIN32(GetLastError());
1227
1228         /* Return the sample no matter what so it can be destroyed */
1229         *ppSample = pDataRq->pSample;
1230         *pdwUser = pDataRq->dwUserData;
1231
1232         if (This->bFlushing)
1233             hr = VFW_E_WRONG_STATE;
1234
1235         if (FAILED(hr))
1236             dwBytes = 0;
1237
1238         /* Set the time on the sample */
1239         IMediaSample_SetActualDataLength(pDataRq->pSample, dwBytes);
1240
1241         rtStart = (DWORD64)pDataRq->ovl.u.s.Offset + ((DWORD64)pDataRq->ovl.u.s.OffsetHigh << 32);
1242         rtStart = MEDIATIME_FROM_BYTES(rtStart);
1243         rtStop = rtStart + MEDIATIME_FROM_BYTES(dwBytes);
1244
1245         IMediaSample_GetTime(pDataRq->pSample, &rtSampleStart, &rtSampleStop);
1246         assert(rtStart == rtSampleStart);
1247         assert(rtStop <= rtSampleStop);
1248
1249         IMediaSample_SetTime(pDataRq->pSample, &rtStart, &rtStop);
1250         assert(rtStart == rtSampleStart);
1251         if (hr == S_OK)
1252             assert(rtStop == rtSampleStop);
1253         else
1254             assert(rtStop == rtStart);
1255
1256         This->sample_list[buffer].pSample = NULL;
1257         assert(This->oldest_sample < This->samples);
1258
1259         if (buffer == This->oldest_sample)
1260         {
1261             LONG x;
1262             for (x = This->oldest_sample + 1; x < This->samples; ++x)
1263                 if (This->sample_list[x].pSample)
1264                     break;
1265             if (x >= This->samples)
1266                 for (x = 0; x < This->oldest_sample; ++x)
1267                     if (This->sample_list[x].pSample)
1268                         break;
1269             if (This->oldest_sample == x)
1270                 /* No samples found, reset to 0 */
1271                 x = 0;
1272             This->oldest_sample = x;
1273         }
1274     }
1275     LeaveCriticalSection(&This->csList);
1276
1277     TRACE("-- %x\n", hr);
1278     return hr;
1279 }
1280
1281 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer);
1282
1283 static HRESULT WINAPI FileAsyncReader_SyncReadAligned(IAsyncReader * iface, IMediaSample * pSample)
1284 {
1285     BYTE * pBuffer;
1286     REFERENCE_TIME tStart;
1287     REFERENCE_TIME tStop;
1288     HRESULT hr;
1289
1290     TRACE("(%p)\n", pSample);
1291
1292     hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
1293
1294     if (SUCCEEDED(hr))
1295         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1296
1297     if (SUCCEEDED(hr))
1298         hr = FileAsyncReader_SyncRead(iface,
1299             BYTES_FROM_MEDIATIME(tStart),
1300             (LONG) BYTES_FROM_MEDIATIME(tStop - tStart),
1301             pBuffer);
1302
1303     TRACE("-- %x\n", hr);
1304     return hr;
1305 }
1306
1307 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer)
1308 {
1309     OVERLAPPED ovl;
1310     HRESULT hr = S_OK;
1311     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1312
1313     TRACE("(%x%08x, %d, %p)\n", (ULONG)(llPosition >> 32), (ULONG)llPosition, lLength, pBuffer);
1314
1315     ZeroMemory(&ovl, sizeof(ovl));
1316
1317     ovl.hEvent = CreateEventW(NULL, 0, 0, NULL);
1318     /* NOTE: llPosition is the actual byte position to start reading from */
1319     ovl.u.s.Offset = (DWORD) llPosition;
1320     ovl.u.s.OffsetHigh = (DWORD) (llPosition >> (sizeof(DWORD) * 8));
1321
1322     if (!ReadFile(This->hFile, pBuffer, lLength, NULL, &ovl))
1323         hr = HRESULT_FROM_WIN32(GetLastError());
1324
1325     if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1326         hr = S_OK;
1327
1328     if (SUCCEEDED(hr))
1329     {
1330         DWORD dwBytesRead;
1331
1332         if (!GetOverlappedResult(This->hFile, &ovl, &dwBytesRead, TRUE))
1333             hr = HRESULT_FROM_WIN32(GetLastError());
1334     }
1335
1336     CloseHandle(ovl.hEvent);
1337
1338     TRACE("-- %x\n", hr);
1339     return hr;
1340 }
1341
1342 static HRESULT WINAPI FileAsyncReader_Length(IAsyncReader * iface, LONGLONG * pTotal, LONGLONG * pAvailable)
1343 {
1344     DWORD dwSizeLow;
1345     DWORD dwSizeHigh;
1346     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1347
1348     TRACE("(%p, %p)\n", pTotal, pAvailable);
1349
1350     if (((dwSizeLow = GetFileSize(This->hFile, &dwSizeHigh)) == -1) &&
1351         (GetLastError() != NO_ERROR))
1352         return HRESULT_FROM_WIN32(GetLastError());
1353
1354     *pTotal = (LONGLONG)dwSizeLow | (LONGLONG)dwSizeHigh << (sizeof(DWORD) * 8);
1355
1356     *pAvailable = *pTotal;
1357
1358     return S_OK;
1359 }
1360
1361 static HRESULT WINAPI FileAsyncReader_BeginFlush(IAsyncReader * iface)
1362 {
1363     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1364
1365     TRACE("()\n");
1366
1367     EnterCriticalSection(&This->csList);
1368     This->bFlushing = TRUE;
1369     CancelIo(This->hFile);
1370     SetEvent(This->handle_list[This->samples]);
1371     LeaveCriticalSection(&This->csList);
1372
1373     return S_OK;
1374 }
1375
1376 static HRESULT WINAPI FileAsyncReader_EndFlush(IAsyncReader * iface)
1377 {
1378     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1379     int x;
1380
1381     TRACE("()\n");
1382
1383     EnterCriticalSection(&This->csList);
1384     ResetEvent(This->handle_list[This->samples]);
1385     This->bFlushing = FALSE;
1386     for (x = 0; x < This->samples; ++x)
1387         assert(!This->sample_list[x].pSample);
1388
1389     LeaveCriticalSection(&This->csList);
1390
1391     return S_OK;
1392 }
1393
1394 static const IAsyncReaderVtbl FileAsyncReader_Vtbl =
1395 {
1396     FileAsyncReader_QueryInterface,
1397     FileAsyncReader_AddRef,
1398     FileAsyncReader_Release,
1399     FileAsyncReader_RequestAllocator,
1400     FileAsyncReader_Request,
1401     FileAsyncReader_WaitForNext,
1402     FileAsyncReader_SyncReadAligned,
1403     FileAsyncReader_SyncRead,
1404     FileAsyncReader_Length,
1405     FileAsyncReader_BeginFlush,
1406     FileAsyncReader_EndFlush,
1407 };