dlls/quartz/pin.c

   1 /*
   2  * Generic Implementation of IPin Interface
   3  *
   4  * Copyright 2003 Robert Shearman
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "quartz_private.h"
  22 #include "pin.h"
  23
  24 #include "wine/debug.h"
  25 #include "wine/unicode.h"
  26 #include "uuids.h"
  27 #include "vfwmsgs.h"
  28 #include <assert.h>
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  31
  32 #define ALIGNDOWN(value,boundary) ((value)/(boundary)*(boundary))
  33 #define ALIGNUP(value,boundary) (ALIGNDOWN((value)+(boundary)-1, (boundary)))
  34
  35 typedef HRESULT (*SendPinFunc)( IPin *to, LPVOID arg );
  36
  37 /** Helper function, there are a lot of places where the error code is inherited
  38  * The following rules apply:
  39  *
  40  * Return the first received error code (E_NOTIMPL is ignored)
  41  * If no errors occur: return the first received non-error-code that isn't S_OK
  42  */
  43 static HRESULT updatehres( HRESULT original, HRESULT new )
  44 {
  45     if (FAILED( original ) || new == E_NOTIMPL)
  46         return original;
  47
  48     if (FAILED( new ) || original == S_OK)
  49         return new;
  50
  51     return original;
  52 }
  53
  54 /** Sends a message from a pin further to other, similar pins
  55  * fnMiddle is called on each pin found further on the stream.
  56  * fnEnd (can be NULL) is called when the message can't be sent any further (this is a renderer or source)
  57  *
  58  * If the pin given is an input pin, the message will be sent downstream to other input pins
  59  * If the pin given is an output pin, the message will be sent upstream to other output pins
  60  */
  61 static HRESULT SendFurther( IPin *from, SendPinFunc fnMiddle, LPVOID arg, SendPinFunc fnEnd )
  62 {
  63     PIN_INFO pin_info;
  64     ULONG amount = 0;
  65     HRESULT hr = S_OK;
  66     HRESULT hr_return = S_OK;
  67     IEnumPins *enumpins = NULL;
  68     BOOL foundend = TRUE;
  69     PIN_DIRECTION from_dir;
  70
  71     IPin_QueryDirection( from, &from_dir );
  72
  73     hr = IPin_QueryInternalConnections( from, NULL, &amount );
  74     if (hr != E_NOTIMPL && amount)
  75         FIXME("Use QueryInternalConnections!\n");
  76
  77     pin_info.pFilter = NULL;
  78     hr = IPin_QueryPinInfo( from, &pin_info );
  79     if (FAILED(hr))
  80         goto out;
  81
  82     hr = IBaseFilter_EnumPins( pin_info.pFilter, &enumpins );
  83     if (FAILED(hr))
  84         goto out;
  85
  86     hr = IEnumPins_Reset( enumpins );
  87     while (hr == S_OK) {
  88         IPin *pin = NULL;
  89         hr = IEnumPins_Next( enumpins, 1, &pin, NULL );
  90         if (hr == VFW_E_ENUM_OUT_OF_SYNC)
  91         {
  92             hr = IEnumPins_Reset( enumpins );
  93             continue;
  94         }
  95         if (pin)
  96         {
  97             PIN_DIRECTION dir;
  98
  99             IPin_QueryDirection( pin, &dir );
 100             if (dir != from_dir)
 101             {
 102                 IPin *connected = NULL;
 103
 104                 foundend = FALSE;
 105                 IPin_ConnectedTo( pin, &connected );
 106                 if (connected)
 107                 {
 108                     HRESULT hr_local;
 109
 110                     hr_local = fnMiddle( connected, arg );
 111                     hr_return = updatehres( hr_return, hr_local );
 112                     IPin_Release(connected);
 113                 }
 114             }
 115             IPin_Release( pin );
 116         }
 117         else
 118         {
 119             hr = S_OK;
 120             break;
 121         }
 122     }
 123
 124     if (!foundend)
 125         hr = hr_return;
 126     else if (fnEnd) {
 127         HRESULT hr_local;
 128
 129         hr_local = fnEnd( from, arg );
 130         hr_return = updatehres( hr_return, hr_local );
 131     }
 132
 133 out:
 134     if (enumpins)
 135         IEnumPins_Release( enumpins );
 136     if (pin_info.pFilter)
 137         IBaseFilter_Release( pin_info.pFilter );
 138     return hr;
 139 }
 140
 141
 142 static void Copy_PinInfo(PIN_INFO * pDest, const PIN_INFO * pSrc)
 143 {
 144     /* Tempting to just do a memcpy, but the name field is
 145        128 characters long! We will probably never exceed 10
 146        most of the time, so we are better off copying
 147        each field manually */
 148     strcpyW(pDest->achName, pSrc->achName);
 149     pDest->dir = pSrc->dir;
 150     pDest->pFilter = pSrc->pFilter;
 151 }
 152
 153 static HRESULT deliver_endofstream(IPin* pin, LPVOID unused)
 154 {
 155     return IPin_EndOfStream( pin );
 156 }
 157
 158 static HRESULT deliver_beginflush(IPin* pin, LPVOID unused)
 159 {
 160     return IPin_BeginFlush( pin );
 161 }
 162
 163 static HRESULT deliver_endflush(IPin* pin, LPVOID unused)
 164 {
 165     return IPin_EndFlush( pin );
 166 }
 167
 168 typedef struct newsegmentargs
 169 {
 170     REFERENCE_TIME tStart, tStop;
 171     double rate;
 172 } newsegmentargs;
 173
 174 static HRESULT deliver_newsegment(IPin *pin, LPVOID data)
 175 {
 176     newsegmentargs *args = data;
 177     return IPin_NewSegment(pin, args->tStart, args->tStop, args->rate);
 178 }
 179
 180 /*** PullPin implementation ***/
 181
 182 static HRESULT PullPin_Init(const IPinVtbl *PullPin_Vtbl, const PIN_INFO * pPinInfo, SAMPLEPROC_PULL pSampleProc, LPVOID pUserData,
 183                             QUERYACCEPTPROC pQueryAccept, CLEANUPPROC pCleanUp, REQUESTPROC pCustomRequest, STOPPROCESSPROC pDone, LPCRITICAL_SECTION pCritSec, PullPin * pPinImpl)
 184 {
 185     /* Common attributes */
 186     pPinImpl->pin.IPin_iface.lpVtbl = PullPin_Vtbl;
 187     pPinImpl->pin.refCount = 1;
 188     pPinImpl->pin.pConnectedTo = NULL;
 189     pPinImpl->pin.pCritSec = pCritSec;
 190     Copy_PinInfo(&pPinImpl->pin.pinInfo, pPinInfo);
 191     ZeroMemory(&pPinImpl->pin.mtCurrent, sizeof(AM_MEDIA_TYPE));
 192
 193     /* Input pin attributes */
 194     pPinImpl->pUserData = pUserData;
 195     pPinImpl->fnQueryAccept = pQueryAccept;
 196     pPinImpl->fnSampleProc = pSampleProc;
 197     pPinImpl->fnCleanProc = pCleanUp;
 198     pPinImpl->fnDone = pDone;
 199     pPinImpl->fnPreConnect = NULL;
 200     pPinImpl->pAlloc = NULL;
 201     pPinImpl->prefAlloc = NULL;
 202     pPinImpl->pReader = NULL;
 203     pPinImpl->hThread = NULL;
 204     pPinImpl->hEventStateChanged = CreateEventW(NULL, TRUE, TRUE, NULL);
 205     pPinImpl->thread_sleepy = CreateEventW(NULL, FALSE, FALSE, NULL);
 206
 207     pPinImpl->rtStart = 0;
 208     pPinImpl->rtCurrent = 0;
 209     pPinImpl->rtStop = ((LONGLONG)0x7fffffff << 32) | 0xffffffff;
 210     pPinImpl->dRate = 1.0;
 211     pPinImpl->state = Req_Die;
 212     pPinImpl->fnCustomRequest = pCustomRequest;
 213     pPinImpl->stop_playback = TRUE;
 214
 215     InitializeCriticalSection(&pPinImpl->thread_lock);
 216     pPinImpl->thread_lock.DebugInfo->Spare[0] = (DWORD_PTR)( __FILE__ ": PullPin.thread_lock");
 217
 218     return S_OK;
 219 }
 220
 221 HRESULT PullPin_Construct(const IPinVtbl *PullPin_Vtbl, const PIN_INFO * pPinInfo,
 222                           SAMPLEPROC_PULL pSampleProc, LPVOID pUserData, QUERYACCEPTPROC pQueryAccept,
 223                           CLEANUPPROC pCleanUp, REQUESTPROC pCustomRequest, STOPPROCESSPROC pDone,
 224                           LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 225 {
 226     PullPin * pPinImpl;
 227
 228     *ppPin = NULL;
 229
 230     if (pPinInfo->dir != PINDIR_INPUT)
 231     {
 232         ERR("Pin direction(%x) != PINDIR_INPUT\n", pPinInfo->dir);
 233         return E_INVALIDARG;
 234     }
 235
 236     pPinImpl = CoTaskMemAlloc(sizeof(*pPinImpl));
 237
 238     if (!pPinImpl)
 239         return E_OUTOFMEMORY;
 240
 241     if (SUCCEEDED(PullPin_Init(PullPin_Vtbl, pPinInfo, pSampleProc, pUserData, pQueryAccept, pCleanUp, pCustomRequest, pDone, pCritSec, pPinImpl)))
 242     {
 243         *ppPin = &pPinImpl->pin.IPin_iface;
 244         return S_OK;
 245     }
 246
 247     CoTaskMemFree(pPinImpl);
 248     return E_FAIL;
 249 }
 250
 251 static HRESULT PullPin_InitProcessing(PullPin * This);
 252
 253 HRESULT WINAPI PullPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 254 {
 255     PIN_DIRECTION pindirReceive;
 256     HRESULT hr = S_OK;
 257     PullPin *This = impl_PullPin_from_IPin(iface);
 258
 259     TRACE("(%p/%p)->(%p, %p)\n", This, iface, pReceivePin, pmt);
 260     dump_AM_MEDIA_TYPE(pmt);
 261
 262     EnterCriticalSection(This->pin.pCritSec);
 263     if (!This->pin.pConnectedTo)
 264     {
 265         ALLOCATOR_PROPERTIES props;
 266
 267         props.cBuffers = 3;
 268         props.cbBuffer = 64 * 1024; /* 64 KB */
 269         props.cbAlign = 1;
 270         props.cbPrefix = 0;
 271
 272         if (This->fnQueryAccept(This->pUserData, pmt) != S_OK)
 273             hr = VFW_E_TYPE_NOT_ACCEPTED; /* FIXME: shouldn't we just map common errors onto
 274                                            * VFW_E_TYPE_NOT_ACCEPTED and pass the value on otherwise? */
 275
 276         if (SUCCEEDED(hr))
 277         {
 278             IPin_QueryDirection(pReceivePin, &pindirReceive);
 279
 280             if (pindirReceive != PINDIR_OUTPUT)
 281             {
 282                 ERR("Can't connect from non-output pin\n");
 283                 hr = VFW_E_INVALID_DIRECTION;
 284             }
 285         }
 286
 287         This->pReader = NULL;
 288         This->pAlloc = NULL;
 289         This->prefAlloc = NULL;
 290         if (SUCCEEDED(hr))
 291         {
 292             hr = IPin_QueryInterface(pReceivePin, &IID_IAsyncReader, (LPVOID *)&This->pReader);
 293         }
 294
 295         if (SUCCEEDED(hr) && This->fnPreConnect)
 296         {
 297             hr = This->fnPreConnect(iface, pReceivePin, &props);
 298         }
 299
 300         /*
 301          * Some custom filters (such as the one used by Fallout 3
 302          * and Fallout: New Vegas) expect to be passed a non-NULL
 303          * preferred allocator.
 304          */
 305         if (SUCCEEDED(hr))
 306         {
 307             hr = StdMemAllocator_create(NULL, (LPVOID *) &This->prefAlloc);
 308         }
 309
 310         if (SUCCEEDED(hr))
 311         {
 312             hr = IAsyncReader_RequestAllocator(This->pReader, This->prefAlloc, &props, &This->pAlloc);
 313         }
 314
 315         if (SUCCEEDED(hr))
 316         {
 317             CopyMediaType(&This->pin.mtCurrent, pmt);
 318             This->pin.pConnectedTo = pReceivePin;
 319             IPin_AddRef(pReceivePin);
 320             hr = IMemAllocator_Commit(This->pAlloc);
 321         }
 322
 323         if (SUCCEEDED(hr))
 324             hr = PullPin_InitProcessing(This);
 325
 326         if (FAILED(hr))
 327         {
 328              if (This->pReader)
 329                  IAsyncReader_Release(This->pReader);
 330              This->pReader = NULL;
 331              if (This->prefAlloc)
 332                  IMemAllocator_Release(This->prefAlloc);
 333              This->prefAlloc = NULL;
 334              if (This->pAlloc)
 335                  IMemAllocator_Release(This->pAlloc);
 336              This->pAlloc = NULL;
 337         }
 338     }
 339     else
 340         hr = VFW_E_ALREADY_CONNECTED;
 341     LeaveCriticalSection(This->pin.pCritSec);
 342     return hr;
 343 }
 344
 345 HRESULT WINAPI PullPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 346 {
 347     PullPin *This = impl_PullPin_from_IPin(iface);
 348
 349     TRACE("(%p/%p)->(%s, %p)\n", This, iface, qzdebugstr_guid(riid), ppv);
 350
 351     *ppv = NULL;
 352
 353     if (IsEqualIID(riid, &IID_IUnknown))
 354         *ppv = iface;
 355     else if (IsEqualIID(riid, &IID_IPin))
 356         *ppv = iface;
 357     else if (IsEqualIID(riid, &IID_IMediaSeeking) ||
 358              IsEqualIID(riid, &IID_IQualityControl))
 359     {
 360         return IBaseFilter_QueryInterface(This->pin.pinInfo.pFilter, riid, ppv);
 361     }
 362
 363     if (*ppv)
 364     {
 365         IUnknown_AddRef((IUnknown *)(*ppv));
 366         return S_OK;
 367     }
 368
 369     FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 370
 371     return E_NOINTERFACE;
 372 }
 373
 374 ULONG WINAPI PullPin_Release(IPin *iface)
 375 {
 376     PullPin *This = impl_PullPin_from_IPin(iface);
 377     ULONG refCount = InterlockedDecrement(&This->pin.refCount);
 378
 379     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 380
 381     if (!refCount)
 382     {
 383         WaitForSingleObject(This->hEventStateChanged, INFINITE);
 384         assert(!This->hThread);
 385
 386         if(This->prefAlloc)
 387             IMemAllocator_Release(This->prefAlloc);
 388         if(This->pAlloc)
 389             IMemAllocator_Release(This->pAlloc);
 390         if(This->pReader)
 391             IAsyncReader_Release(This->pReader);
 392         CloseHandle(This->thread_sleepy);
 393         CloseHandle(This->hEventStateChanged);
 394         This->thread_lock.DebugInfo->Spare[0] = 0;
 395         DeleteCriticalSection(&This->thread_lock);
 396         CoTaskMemFree(This);
 397         return 0;
 398     }
 399     return refCount;
 400 }
 401
 402 static void PullPin_Flush(PullPin *This)
 403 {
 404     IMediaSample *pSample;
 405     TRACE("Flushing!\n");
 406
 407     if (This->pReader)
 408     {
 409         /* Do not allow state to change while flushing */
 410         EnterCriticalSection(This->pin.pCritSec);
 411
 412         /* Flush outstanding samples */
 413         IAsyncReader_BeginFlush(This->pReader);
 414
 415         for (;;)
 416         {
 417             DWORD_PTR dwUser;
 418
 419             pSample = NULL;
 420             IAsyncReader_WaitForNext(This->pReader, 0, &pSample, &dwUser);
 421
 422             if (!pSample)
 423                 break;
 424
 425             assert(!IMediaSample_GetActualDataLength(pSample));
 426
 427             IMediaSample_Release(pSample);
 428         }
 429
 430         IAsyncReader_EndFlush(This->pReader);
 431
 432         LeaveCriticalSection(This->pin.pCritSec);
 433     }
 434 }
 435
 436 static void PullPin_Thread_Process(PullPin *This)
 437 {
 438     HRESULT hr;
 439     IMediaSample * pSample = NULL;
 440     ALLOCATOR_PROPERTIES allocProps;
 441
 442     hr = IMemAllocator_GetProperties(This->pAlloc, &allocProps);
 443
 444     This->cbAlign = allocProps.cbAlign;
 445
 446     if (This->rtCurrent < This->rtStart)
 447         This->rtCurrent = MEDIATIME_FROM_BYTES(ALIGNDOWN(BYTES_FROM_MEDIATIME(This->rtStart), This->cbAlign));
 448
 449     TRACE("Start\n");
 450
 451     if (This->rtCurrent >= This->rtStop)
 452     {
 453         IPin_EndOfStream(&This->pin.IPin_iface);
 454         return;
 455     }
 456
 457     /* There is no sample in our buffer */
 458     hr = This->fnCustomRequest(This->pUserData);
 459
 460     if (FAILED(hr))
 461         ERR("Request error: %x\n", hr);
 462
 463     EnterCriticalSection(This->pin.pCritSec);
 464     SetEvent(This->hEventStateChanged);
 465     LeaveCriticalSection(This->pin.pCritSec);
 466
 467     if (SUCCEEDED(hr))
 468     do
 469     {
 470         DWORD_PTR dwUser;
 471
 472         TRACE("Process sample\n");
 473
 474         pSample = NULL;
 475         hr = IAsyncReader_WaitForNext(This->pReader, 10000, &pSample, &dwUser);
 476
 477         /* Return an empty sample on error to the implementation in case it does custom parsing, so it knows it's gone */
 478         if (SUCCEEDED(hr))
 479         {
 480             hr = This->fnSampleProc(This->pUserData, pSample, dwUser);
 481         }
 482         else
 483         {
 484             if (hr == VFW_E_TIMEOUT)
 485             {
 486                 if (pSample != NULL)
 487                     WARN("Non-NULL sample returned with VFW_E_TIMEOUT.\n");
 488                 hr = S_OK;
 489             }
 490             /* FIXME: Errors are not well handled yet! */
 491             else
 492                 ERR("Processing error: %x\n", hr);
 493         }
 494
 495         if (pSample)
 496         {
 497             IMediaSample_Release(pSample);
 498             pSample = NULL;
 499         }
 500     } while (This->rtCurrent < This->rtStop && hr == S_OK && !This->stop_playback);
 501
 502     /*
 503      * Sample was rejected, and we are asked to terminate.  When there is more than one buffer
 504      * it is possible for a filter to have several queued samples, making it necessary to
 505      * release all of these pending samples.
 506      */
 507     if (This->stop_playback || FAILED(hr))
 508     {
 509         DWORD_PTR dwUser;
 510
 511         do
 512         {
 513             if (pSample)
 514                 IMediaSample_Release(pSample);
 515             pSample = NULL;
 516             IAsyncReader_WaitForNext(This->pReader, 0, &pSample, &dwUser);
 517         } while(pSample);
 518     }
 519
 520     /* Can't reset state to Sleepy here because that might race, instead PauseProcessing will do that for us
 521      * Flush remaining samples
 522      */
 523     if (This->fnDone)
 524         This->fnDone(This->pUserData);
 525
 526     TRACE("End: %08x, %d\n", hr, This->stop_playback);
 527 }
 528
 529 static void PullPin_Thread_Pause(PullPin *This)
 530 {
 531     PullPin_Flush(This);
 532
 533     EnterCriticalSection(This->pin.pCritSec);
 534     This->state = Req_Sleepy;
 535     SetEvent(This->hEventStateChanged);
 536     LeaveCriticalSection(This->pin.pCritSec);
 537 }
 538
 539 static void  PullPin_Thread_Stop(PullPin *This)
 540 {
 541     TRACE("(%p)->()\n", This);
 542
 543     EnterCriticalSection(This->pin.pCritSec);
 544     SetEvent(This->hEventStateChanged);
 545     LeaveCriticalSection(This->pin.pCritSec);
 546
 547     IBaseFilter_Release(This->pin.pinInfo.pFilter);
 548
 549     CoUninitialize();
 550     ExitThread(0);
 551 }
 552
 553 static DWORD WINAPI PullPin_Thread_Main(LPVOID pv)
 554 {
 555     PullPin *This = pv;
 556     CoInitializeEx(NULL, COINIT_MULTITHREADED);
 557
 558     PullPin_Flush(This);
 559
 560     for (;;)
 561     {
 562         WaitForSingleObject(This->thread_sleepy, INFINITE);
 563
 564         TRACE("State: %d\n", This->state);
 565
 566         switch (This->state)
 567         {
 568         case Req_Die: PullPin_Thread_Stop(This); break;
 569         case Req_Run: PullPin_Thread_Process(This); break;
 570         case Req_Pause: PullPin_Thread_Pause(This); break;
 571         case Req_Sleepy: ERR("Should not be signalled with SLEEPY!\n"); break;
 572         default: ERR("Unknown state request: %d\n", This->state); break;
 573         }
 574     }
 575     return 0;
 576 }
 577
 578 static HRESULT PullPin_InitProcessing(PullPin * This)
 579 {
 580     HRESULT hr = S_OK;
 581
 582     TRACE("(%p)->()\n", This);
 583
 584     /* if we are connected */
 585     if (This->pAlloc)
 586     {
 587         DWORD dwThreadId;
 588
 589         WaitForSingleObject(This->hEventStateChanged, INFINITE);
 590         EnterCriticalSection(This->pin.pCritSec);
 591
 592         assert(!This->hThread);
 593         assert(This->state == Req_Die);
 594         assert(This->stop_playback);
 595         assert(WaitForSingleObject(This->thread_sleepy, 0) == WAIT_TIMEOUT);
 596         This->state = Req_Sleepy;
 597
 598         /* AddRef the filter to make sure it and its pins will be around
 599          * as long as the thread */
 600         IBaseFilter_AddRef(This->pin.pinInfo.pFilter);
 601
 602
 603         This->hThread = CreateThread(NULL, 0, PullPin_Thread_Main, This, 0, &dwThreadId);
 604         if (!This->hThread)
 605         {
 606             hr = HRESULT_FROM_WIN32(GetLastError());
 607             IBaseFilter_Release(This->pin.pinInfo.pFilter);
 608         }
 609
 610         if (SUCCEEDED(hr))
 611         {
 612             SetEvent(This->hEventStateChanged);
 613             /* If assert fails, that means a command was not processed before the thread previously terminated */
 614         }
 615         LeaveCriticalSection(This->pin.pCritSec);
 616     }
 617
 618     TRACE(" -- %x\n", hr);
 619
 620     return hr;
 621 }
 622
 623 HRESULT PullPin_StartProcessing(PullPin * This)
 624 {
 625     /* if we are connected */
 626     TRACE("(%p)->()\n", This);
 627     if(This->pAlloc)
 628     {
 629         assert(This->hThread);
 630
 631         PullPin_WaitForStateChange(This, INFINITE);
 632
 633         assert(This->state == Req_Sleepy);
 634
 635         /* Wake up! */
 636         assert(WaitForSingleObject(This->thread_sleepy, 0) == WAIT_TIMEOUT);
 637         This->state = Req_Run;
 638         This->stop_playback = FALSE;
 639         ResetEvent(This->hEventStateChanged);
 640         SetEvent(This->thread_sleepy);
 641     }
 642
 643     return S_OK;
 644 }
 645
 646 HRESULT PullPin_PauseProcessing(PullPin * This)
 647 {
 648     /* if we are connected */
 649     TRACE("(%p)->()\n", This);
 650     if(This->pAlloc)
 651     {
 652         assert(This->hThread);
 653
 654         PullPin_WaitForStateChange(This, INFINITE);
 655
 656         EnterCriticalSection(This->pin.pCritSec);
 657
 658         assert(!This->stop_playback);
 659         assert(This->state == Req_Run|| This->state == Req_Sleepy);
 660
 661         assert(WaitForSingleObject(This->thread_sleepy, 0) == WAIT_TIMEOUT);
 662
 663         This->state = Req_Pause;
 664         This->stop_playback = TRUE;
 665         ResetEvent(This->hEventStateChanged);
 666         SetEvent(This->thread_sleepy);
 667
 668         /* Release any outstanding samples */
 669         if (This->pReader)
 670         {
 671             IMediaSample *pSample;
 672             DWORD_PTR dwUser;
 673
 674             do
 675             {
 676                 pSample = NULL;
 677                 IAsyncReader_WaitForNext(This->pReader, 0, &pSample, &dwUser);
 678                 if (pSample)
 679                     IMediaSample_Release(pSample);
 680             } while(pSample);
 681         }
 682
 683         LeaveCriticalSection(This->pin.pCritSec);
 684     }
 685
 686     return S_OK;
 687 }
 688
 689 static HRESULT PullPin_StopProcessing(PullPin * This)
 690 {
 691     TRACE("(%p)->()\n", This);
 692
 693     /* if we are alive */
 694     assert(This->hThread);
 695
 696     PullPin_WaitForStateChange(This, INFINITE);
 697
 698     assert(This->state == Req_Pause || This->state == Req_Sleepy);
 699
 700     This->stop_playback = TRUE;
 701     This->state = Req_Die;
 702     assert(WaitForSingleObject(This->thread_sleepy, 0) == WAIT_TIMEOUT);
 703     ResetEvent(This->hEventStateChanged);
 704     SetEvent(This->thread_sleepy);
 705     return S_OK;
 706 }
 707
 708 HRESULT PullPin_WaitForStateChange(PullPin * This, DWORD dwMilliseconds)
 709 {
 710     if (WaitForSingleObject(This->hEventStateChanged, dwMilliseconds) == WAIT_TIMEOUT)
 711         return S_FALSE;
 712     return S_OK;
 713 }
 714
 715 HRESULT WINAPI PullPin_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt)
 716 {
 717     PullPin *This = impl_PullPin_from_IPin(iface);
 718
 719     TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
 720
 721     return (This->fnQueryAccept(This->pUserData, pmt) == S_OK ? S_OK : S_FALSE);
 722 }
 723
 724 HRESULT WINAPI PullPin_EndOfStream(IPin * iface)
 725 {
 726     PullPin *This = impl_PullPin_from_IPin(iface);
 727     HRESULT hr = S_FALSE;
 728
 729     TRACE("(%p)->()\n", iface);
 730
 731     EnterCriticalSection(This->pin.pCritSec);
 732     hr = SendFurther( iface, deliver_endofstream, NULL, NULL );
 733     SetEvent(This->hEventStateChanged);
 734     LeaveCriticalSection(This->pin.pCritSec);
 735
 736     return hr;
 737 }
 738
 739 HRESULT WINAPI PullPin_BeginFlush(IPin * iface)
 740 {
 741     PullPin *This = impl_PullPin_from_IPin(iface);
 742     TRACE("(%p)->()\n", This);
 743
 744     EnterCriticalSection(This->pin.pCritSec);
 745     {
 746         SendFurther( iface, deliver_beginflush, NULL, NULL );
 747     }
 748     LeaveCriticalSection(This->pin.pCritSec);
 749
 750     EnterCriticalSection(&This->thread_lock);
 751     {
 752         if (This->pReader)
 753             IAsyncReader_BeginFlush(This->pReader);
 754         PullPin_WaitForStateChange(This, INFINITE);
 755
 756         if (This->hThread && This->state == Req_Run)
 757         {
 758             PullPin_PauseProcessing(This);
 759             PullPin_WaitForStateChange(This, INFINITE);
 760         }
 761     }
 762     LeaveCriticalSection(&This->thread_lock);
 763
 764     EnterCriticalSection(This->pin.pCritSec);
 765     {
 766         This->fnCleanProc(This->pUserData);
 767     }
 768     LeaveCriticalSection(This->pin.pCritSec);
 769
 770     return S_OK;
 771 }
 772
 773 HRESULT WINAPI PullPin_EndFlush(IPin * iface)
 774 {
 775     PullPin *This = impl_PullPin_from_IPin(iface);
 776
 777     TRACE("(%p)->()\n", iface);
 778
 779     /* Send further first: Else a race condition might terminate processing early */
 780     EnterCriticalSection(This->pin.pCritSec);
 781     SendFurther( iface, deliver_endflush, NULL, NULL );
 782     LeaveCriticalSection(This->pin.pCritSec);
 783
 784     EnterCriticalSection(&This->thread_lock);
 785     {
 786         FILTER_STATE state;
 787
 788         if (This->pReader)
 789             IAsyncReader_EndFlush(This->pReader);
 790
 791         IBaseFilter_GetState(This->pin.pinInfo.pFilter, INFINITE, &state);
 792
 793         if (state != State_Stopped)
 794             PullPin_StartProcessing(This);
 795
 796         PullPin_WaitForStateChange(This, INFINITE);
 797     }
 798     LeaveCriticalSection(&This->thread_lock);
 799
 800     return S_OK;
 801 }
 802
 803 HRESULT WINAPI PullPin_Disconnect(IPin *iface)
 804 {
 805     HRESULT hr;
 806     PullPin *This = impl_PullPin_from_IPin(iface);
 807
 808     TRACE("()\n");
 809
 810     EnterCriticalSection(This->pin.pCritSec);
 811     {
 812         if (FAILED(hr = IMemAllocator_Decommit(This->pAlloc)))
 813             ERR("Allocator decommit failed with error %x. Possible memory leak\n", hr);
 814
 815         if (This->pin.pConnectedTo)
 816         {
 817             IPin_Release(This->pin.pConnectedTo);
 818             This->pin.pConnectedTo = NULL;
 819             PullPin_StopProcessing(This);
 820
 821             FreeMediaType(&This->pin.mtCurrent);
 822             ZeroMemory(&This->pin.mtCurrent, sizeof(This->pin.mtCurrent));
 823             hr = S_OK;
 824         }
 825         else
 826             hr = S_FALSE;
 827     }
 828     LeaveCriticalSection(This->pin.pCritSec);
 829
 830     WaitForSingleObject(This->hThread, INFINITE);
 831     CloseHandle(This->hThread);
 832     This->hThread = NULL;
 833
 834     return hr;
 835 }
 836
 837 HRESULT WINAPI PullPin_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
 838 {
 839     newsegmentargs args;
 840     FIXME("(%p)->(%s, %s, %g) stub\n", iface, wine_dbgstr_longlong(tStart), wine_dbgstr_longlong(tStop), dRate);
 841
 842     args.tStart = tStart;
 843     args.tStop = tStop;
 844     args.rate = dRate;
 845
 846     return SendFurther( iface, deliver_newsegment, &args, NULL );
 847 }