dlls/strmbase/pin.c

   1 /*
   2  * Generic Implementation of IPin Interface
   3  *
   4  * Copyright 2003 Robert Shearman
   5  * Copyright 2010 Aric Stewart, CodeWeavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #define COBJMACROS
  23
  24 #include "dshow.h"
  25 #include "wine/debug.h"
  26 #include "wine/unicode.h"
  27 #include "wine/strmbase.h"
  28 #include "uuids.h"
  29 #include "vfwmsgs.h"
  30 #include <assert.h>
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
  33
  34 static const IPinVtbl InputPin_Vtbl;
  35 static const IPinVtbl OutputPin_Vtbl;
  36 static const IMemInputPinVtbl MemInputPin_Vtbl;
  37
  38 typedef HRESULT (*SendPinFunc)( IPin *to, LPVOID arg );
  39
  40 static inline BasePin *impl_from_IPin( IPin *iface )
  41 {
  42     return CONTAINING_RECORD(iface, BasePin, IPin_iface);
  43 }
  44
  45 /** Helper function, there are a lot of places where the error code is inherited
  46  * The following rules apply:
  47  *
  48  * Return the first received error code (E_NOTIMPL is ignored)
  49  * If no errors occur: return the first received non-error-code that isn't S_OK
  50  */
  51 static HRESULT updatehres( HRESULT original, HRESULT new )
  52 {
  53     if (FAILED( original ) || new == E_NOTIMPL)
  54         return original;
  55
  56     if (FAILED( new ) || original == S_OK)
  57         return new;
  58
  59     return original;
  60 }
  61
  62 /** Sends a message from a pin further to other, similar pins
  63  * fnMiddle is called on each pin found further on the stream.
  64  * fnEnd (can be NULL) is called when the message can't be sent any further (this is a renderer or source)
  65  *
  66  * If the pin given is an input pin, the message will be sent downstream to other input pins
  67  * If the pin given is an output pin, the message will be sent upstream to other output pins
  68  */
  69 static HRESULT SendFurther( IPin *from, SendPinFunc fnMiddle, LPVOID arg, SendPinFunc fnEnd )
  70 {
  71     PIN_INFO pin_info;
  72     ULONG amount = 0;
  73     HRESULT hr = S_OK;
  74     HRESULT hr_return = S_OK;
  75     IEnumPins *enumpins = NULL;
  76     BOOL foundend = TRUE;
  77     PIN_DIRECTION from_dir;
  78
  79     IPin_QueryDirection( from, &from_dir );
  80
  81     hr = IPin_QueryInternalConnections( from, NULL, &amount );
  82     if (hr != E_NOTIMPL && amount)
  83         FIXME("Use QueryInternalConnections!\n");
  84      hr = S_OK;
  85
  86     pin_info.pFilter = NULL;
  87     hr = IPin_QueryPinInfo( from, &pin_info );
  88     if (FAILED(hr))
  89         goto out;
  90
  91     hr = IBaseFilter_EnumPins( pin_info.pFilter, &enumpins );
  92     if (FAILED(hr))
  93         goto out;
  94
  95     hr = IEnumPins_Reset( enumpins );
  96     while (hr == S_OK) {
  97         IPin *pin = NULL;
  98         hr = IEnumPins_Next( enumpins, 1, &pin, NULL );
  99         if (hr == VFW_E_ENUM_OUT_OF_SYNC)
 100         {
 101             hr = IEnumPins_Reset( enumpins );
 102             continue;
 103         }
 104         if (pin)
 105         {
 106             PIN_DIRECTION dir;
 107
 108             IPin_QueryDirection( pin, &dir );
 109             if (dir != from_dir)
 110             {
 111                 IPin *connected = NULL;
 112
 113                 foundend = FALSE;
 114                 IPin_ConnectedTo( pin, &connected );
 115                 if (connected)
 116                 {
 117                     HRESULT hr_local;
 118
 119                     hr_local = fnMiddle( connected, arg );
 120                     hr_return = updatehres( hr_return, hr_local );
 121                     IPin_Release(connected);
 122                 }
 123             }
 124             IPin_Release( pin );
 125         }
 126         else
 127         {
 128             hr = S_OK;
 129             break;
 130         }
 131     }
 132
 133     if (!foundend)
 134         hr = hr_return;
 135     else if (fnEnd) {
 136         HRESULT hr_local;
 137
 138         hr_local = fnEnd( from, arg );
 139         hr_return = updatehres( hr_return, hr_local );
 140     }
 141     IEnumPins_Release(enumpins);
 142
 143 out:
 144     if (pin_info.pFilter)
 145         IBaseFilter_Release( pin_info.pFilter );
 146     return hr;
 147 }
 148
 149 static void Copy_PinInfo(PIN_INFO * pDest, const PIN_INFO * pSrc)
 150 {
 151     /* Tempting to just do a memcpy, but the name field is
 152        128 characters long! We will probably never exceed 10
 153        most of the time, so we are better off copying
 154        each field manually */
 155     strcpyW(pDest->achName, pSrc->achName);
 156     pDest->dir = pSrc->dir;
 157     pDest->pFilter = pSrc->pFilter;
 158 }
 159
 160 static void dump_AM_MEDIA_TYPE(const AM_MEDIA_TYPE * pmt)
 161 {
 162     if (!pmt)
 163         return;
 164     TRACE("\t%s\n\t%s\n\t...\n\t%s\n", debugstr_guid(&pmt->majortype), debugstr_guid(&pmt->subtype), debugstr_guid(&pmt->formattype));
 165 }
 166
 167 static BOOL CompareMediaTypes(const AM_MEDIA_TYPE * pmt1, const AM_MEDIA_TYPE * pmt2, BOOL bWildcards)
 168 {
 169     TRACE("pmt1: ");
 170     dump_AM_MEDIA_TYPE(pmt1);
 171     TRACE("pmt2: ");
 172     dump_AM_MEDIA_TYPE(pmt2);
 173     return (((bWildcards && (IsEqualGUID(&pmt1->majortype, &GUID_NULL) || IsEqualGUID(&pmt2->majortype, &GUID_NULL))) || IsEqualGUID(&pmt1->majortype, &pmt2->majortype)) &&
 174             ((bWildcards && (IsEqualGUID(&pmt1->subtype, &GUID_NULL)   || IsEqualGUID(&pmt2->subtype, &GUID_NULL)))   || IsEqualGUID(&pmt1->subtype, &pmt2->subtype)));
 175 }
 176
 177 /*** Common Base Pin function */
 178 HRESULT WINAPI BasePinImpl_GetMediaType(BasePin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
 179 {
 180     if (iPosition < 0)
 181         return E_INVALIDARG;
 182     return VFW_S_NO_MORE_ITEMS;
 183 }
 184
 185 LONG WINAPI BasePinImpl_GetMediaTypeVersion(BasePin *iface)
 186 {
 187     return 1;
 188 }
 189
 190 ULONG WINAPI BasePinImpl_AddRef(IPin * iface)
 191 {
 192     BasePin *This = impl_from_IPin(iface);
 193     ULONG refCount = InterlockedIncrement(&This->refCount);
 194
 195     TRACE("(%p)->() AddRef from %d\n", iface, refCount - 1);
 196
 197     return refCount;
 198 }
 199
 200 HRESULT WINAPI BasePinImpl_Disconnect(IPin * iface)
 201 {
 202     HRESULT hr;
 203     BasePin *This = impl_from_IPin(iface);
 204
 205     TRACE("()\n");
 206
 207     EnterCriticalSection(This->pCritSec);
 208     {
 209         if (This->pConnectedTo)
 210         {
 211             IPin_Release(This->pConnectedTo);
 212             This->pConnectedTo = NULL;
 213             FreeMediaType(&This->mtCurrent);
 214             ZeroMemory(&This->mtCurrent, sizeof(This->mtCurrent));
 215             hr = S_OK;
 216         }
 217         else
 218             hr = S_FALSE;
 219     }
 220     LeaveCriticalSection(This->pCritSec);
 221
 222     return hr;
 223 }
 224
 225 HRESULT WINAPI BasePinImpl_ConnectedTo(IPin * iface, IPin ** ppPin)
 226 {
 227     HRESULT hr;
 228     BasePin *This = impl_from_IPin(iface);
 229
 230     TRACE("(%p)\n", ppPin);
 231
 232     EnterCriticalSection(This->pCritSec);
 233     {
 234         if (This->pConnectedTo)
 235         {
 236             *ppPin = This->pConnectedTo;
 237             IPin_AddRef(*ppPin);
 238             hr = S_OK;
 239         }
 240         else
 241         {
 242             hr = VFW_E_NOT_CONNECTED;
 243             *ppPin = NULL;
 244         }
 245     }
 246     LeaveCriticalSection(This->pCritSec);
 247
 248     return hr;
 249 }
 250
 251 HRESULT WINAPI BasePinImpl_ConnectionMediaType(IPin * iface, AM_MEDIA_TYPE * pmt)
 252 {
 253     HRESULT hr;
 254     BasePin *This = impl_from_IPin(iface);
 255
 256     TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
 257
 258     EnterCriticalSection(This->pCritSec);
 259     {
 260         if (This->pConnectedTo)
 261         {
 262             CopyMediaType(pmt, &This->mtCurrent);
 263             hr = S_OK;
 264         }
 265         else
 266         {
 267             ZeroMemory(pmt, sizeof(*pmt));
 268             hr = VFW_E_NOT_CONNECTED;
 269         }
 270     }
 271     LeaveCriticalSection(This->pCritSec);
 272
 273     return hr;
 274 }
 275
 276 HRESULT WINAPI BasePinImpl_QueryPinInfo(IPin * iface, PIN_INFO * pInfo)
 277 {
 278     BasePin *This = impl_from_IPin(iface);
 279
 280     TRACE("(%p/%p)->(%p)\n", This, iface, pInfo);
 281
 282     Copy_PinInfo(pInfo, &This->pinInfo);
 283     IBaseFilter_AddRef(pInfo->pFilter);
 284
 285     return S_OK;
 286 }
 287
 288 HRESULT WINAPI BasePinImpl_QueryDirection(IPin * iface, PIN_DIRECTION * pPinDir)
 289 {
 290     BasePin *This = impl_from_IPin(iface);
 291
 292     TRACE("(%p/%p)->(%p)\n", This, iface, pPinDir);
 293
 294     *pPinDir = This->pinInfo.dir;
 295
 296     return S_OK;
 297 }
 298
 299 HRESULT WINAPI BasePinImpl_QueryId(IPin * iface, LPWSTR * Id)
 300 {
 301     BasePin *This = impl_from_IPin(iface);
 302
 303     TRACE("(%p/%p)->(%p)\n", This, iface, Id);
 304
 305     *Id = CoTaskMemAlloc((strlenW(This->pinInfo.achName) + 1) * sizeof(WCHAR));
 306     if (!*Id)
 307         return E_OUTOFMEMORY;
 308
 309     strcpyW(*Id, This->pinInfo.achName);
 310
 311     return S_OK;
 312 }
 313
 314 HRESULT WINAPI BasePinImpl_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt)
 315 {
 316     TRACE("(%p)->(%p)\n", iface, pmt);
 317
 318     return S_OK;
 319 }
 320
 321 HRESULT WINAPI BasePinImpl_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum)
 322 {
 323     BasePin *This = impl_from_IPin(iface);
 324
 325     TRACE("(%p/%p)->(%p)\n", This, iface, ppEnum);
 326
 327     /* override this method to allow enumeration of your types */
 328
 329     return EnumMediaTypes_Construct(This, This->pFuncsTable->pfnGetMediaType, This->pFuncsTable->pfnGetMediaTypeVersion , ppEnum);
 330 }
 331
 332 HRESULT WINAPI BasePinImpl_QueryInternalConnections(IPin * iface, IPin ** apPin, ULONG * cPin)
 333 {
 334     BasePin *This = impl_from_IPin(iface);
 335
 336     TRACE("(%p/%p)->(%p, %p)\n", This, iface, apPin, cPin);
 337
 338     return E_NOTIMPL; /* to tell caller that all input pins connected to all output pins */
 339 }
 340
 341 HRESULT WINAPI BasePinImpl_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
 342 {
 343     BasePin *This = impl_from_IPin(iface);
 344
 345     TRACE("(%x%08x, %x%08x, %e)\n", (ULONG)(tStart >> 32), (ULONG)tStart, (ULONG)(tStop >> 32), (ULONG)tStop, dRate);
 346
 347     This->tStart = tStart;
 348     This->tStop = tStop;
 349     This->dRate = dRate;
 350
 351     return S_OK;
 352 }
 353
 354 /*** OutputPin implementation ***/
 355
 356 static inline BaseOutputPin *impl_BaseOutputPin_from_IPin( IPin *iface )
 357 {
 358     return CONTAINING_RECORD(iface, BaseOutputPin, pin.IPin_iface);
 359 }
 360
 361 static inline BaseOutputPin *impl_BaseOutputPin_from_BasePin( BasePin *iface )
 362 {
 363     return CONTAINING_RECORD(iface, BaseOutputPin, pin);
 364 }
 365
 366 HRESULT WINAPI BaseOutputPinImpl_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 367 {
 368     BaseOutputPin *This = impl_BaseOutputPin_from_IPin(iface);
 369
 370     TRACE("(%p/%p)->(%s, %p)\n", This, iface, debugstr_guid(riid), ppv);
 371
 372     *ppv = NULL;
 373
 374     if (IsEqualIID(riid, &IID_IUnknown))
 375         *ppv = iface;
 376     else if (IsEqualIID(riid, &IID_IPin))
 377         *ppv = iface;
 378     else if (IsEqualIID(riid, &IID_IMediaSeeking) ||
 379              IsEqualIID(riid, &IID_IQualityControl))
 380     {
 381         return IBaseFilter_QueryInterface(This->pin.pinInfo.pFilter, riid, ppv);
 382     }
 383
 384     if (*ppv)
 385     {
 386         IUnknown_AddRef((IUnknown *)(*ppv));
 387         return S_OK;
 388     }
 389
 390     FIXME("No interface for %s!\n", debugstr_guid(riid));
 391
 392     return E_NOINTERFACE;
 393 }
 394
 395 ULONG WINAPI BaseOutputPinImpl_Release(IPin * iface)
 396 {
 397     BaseOutputPin *This = impl_BaseOutputPin_from_IPin(iface);
 398     ULONG refCount = InterlockedDecrement(&This->pin.refCount);
 399
 400     TRACE("(%p)->() Release from %d\n", iface, refCount + 1);
 401
 402     if (!refCount)
 403     {
 404         FreeMediaType(&This->pin.mtCurrent);
 405         if (This->pAllocator)
 406             IMemAllocator_Release(This->pAllocator);
 407         This->pAllocator = NULL;
 408         CoTaskMemFree(This);
 409         return 0;
 410     }
 411     return refCount;
 412 }
 413
 414 HRESULT WINAPI BaseOutputPinImpl_Connect(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 415 {
 416     HRESULT hr;
 417     BaseOutputPin *This = impl_BaseOutputPin_from_IPin(iface);
 418
 419     TRACE("(%p/%p)->(%p, %p)\n", This, iface, pReceivePin, pmt);
 420     dump_AM_MEDIA_TYPE(pmt);
 421
 422     if (!pReceivePin)
 423         return E_POINTER;
 424
 425     /* If we try to connect to ourselves, we will definitely deadlock.
 426      * There are other cases where we could deadlock too, but this
 427      * catches the obvious case */
 428     assert(pReceivePin != iface);
 429
 430     EnterCriticalSection(This->pin.pCritSec);
 431     {
 432         /* if we have been a specific type to connect with, then we can either connect
 433          * with that or fail. We cannot choose different AM_MEDIA_TYPE */
 434         if (pmt && !IsEqualGUID(&pmt->majortype, &GUID_NULL) && !IsEqualGUID(&pmt->subtype, &GUID_NULL))
 435             hr = This->pin.pFuncsTable->pfnAttemptConnection(&This->pin, pReceivePin, pmt);
 436         else
 437         {
 438             /* negotiate media type */
 439
 440             IEnumMediaTypes * pEnumCandidates;
 441             AM_MEDIA_TYPE * pmtCandidate = NULL; /* Candidate media type */
 442
 443             if (SUCCEEDED(hr = IPin_EnumMediaTypes(iface, &pEnumCandidates)))
 444             {
 445                 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
 446
 447                 /* try this filter's media types first */
 448                 while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, NULL))
 449                 {
 450                     assert(pmtCandidate);
 451                     dump_AM_MEDIA_TYPE(pmtCandidate);
 452                     if (!IsEqualGUID(&FORMAT_None, &pmtCandidate->formattype)
 453                         && !IsEqualGUID(&GUID_NULL, &pmtCandidate->formattype))
 454                         assert(pmtCandidate->pbFormat);
 455                     if (( !pmt || CompareMediaTypes(pmt, pmtCandidate, TRUE) ) &&
 456                         (This->pin.pFuncsTable->pfnAttemptConnection(&This->pin, pReceivePin, pmtCandidate) == S_OK))
 457                     {
 458                         hr = S_OK;
 459                         DeleteMediaType(pmtCandidate);
 460                         break;
 461                     }
 462                     DeleteMediaType(pmtCandidate);
 463                     pmtCandidate = NULL;
 464                 }
 465                 IEnumMediaTypes_Release(pEnumCandidates);
 466             }
 467
 468             /* then try receiver filter's media types */
 469             if (hr != S_OK && SUCCEEDED(hr = IPin_EnumMediaTypes(pReceivePin, &pEnumCandidates))) /* if we haven't already connected successfully */
 470             {
 471                 ULONG fetched;
 472
 473                 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
 474
 475                 while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, &fetched))
 476                 {
 477                     assert(pmtCandidate);
 478                     dump_AM_MEDIA_TYPE(pmtCandidate);
 479                     if (( !pmt || CompareMediaTypes(pmt, pmtCandidate, TRUE) ) &&
 480                         (This->pin.pFuncsTable->pfnAttemptConnection(&This->pin, pReceivePin, pmtCandidate) == S_OK))
 481                     {
 482                         hr = S_OK;
 483                         DeleteMediaType(pmtCandidate);
 484                         break;
 485                     }
 486                     DeleteMediaType(pmtCandidate);
 487                     pmtCandidate = NULL;
 488                 } /* while */
 489                 IEnumMediaTypes_Release(pEnumCandidates);
 490             } /* if not found */
 491         } /* if negotiate media type */
 492     } /* if succeeded */
 493     LeaveCriticalSection(This->pin.pCritSec);
 494
 495     TRACE(" -- %x\n", hr);
 496     return hr;
 497 }
 498
 499 HRESULT WINAPI BaseOutputPinImpl_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 500 {
 501     ERR("Incoming connection on an output pin! (%p, %p)\n", pReceivePin, pmt);
 502
 503     return E_UNEXPECTED;
 504 }
 505
 506 HRESULT WINAPI BaseOutputPinImpl_Disconnect(IPin * iface)
 507 {
 508     HRESULT hr;
 509     BaseOutputPin *This = impl_BaseOutputPin_from_IPin(iface);
 510
 511     TRACE("()\n");
 512
 513     EnterCriticalSection(This->pin.pCritSec);
 514     {
 515         if (This->pMemInputPin)
 516         {
 517             IMemInputPin_Release(This->pMemInputPin);
 518             This->pMemInputPin = NULL;
 519         }
 520         if (This->pin.pConnectedTo)
 521         {
 522             IPin_Release(This->pin.pConnectedTo);
 523             This->pin.pConnectedTo = NULL;
 524             FreeMediaType(&This->pin.mtCurrent);
 525             ZeroMemory(&This->pin.mtCurrent, sizeof(This->pin.mtCurrent));
 526             hr = S_OK;
 527         }
 528         else
 529             hr = S_FALSE;
 530     }
 531     LeaveCriticalSection(This->pin.pCritSec);
 532
 533     return hr;
 534 }
 535
 536 HRESULT WINAPI BaseOutputPinImpl_EndOfStream(IPin * iface)
 537 {
 538     TRACE("()\n");
 539
 540     /* not supposed to do anything in an output pin */
 541
 542     return E_UNEXPECTED;
 543 }
 544
 545 HRESULT WINAPI BaseOutputPinImpl_BeginFlush(IPin * iface)
 546 {
 547     TRACE("(%p)->()\n", iface);
 548
 549     /* not supposed to do anything in an output pin */
 550
 551     return E_UNEXPECTED;
 552 }
 553
 554 HRESULT WINAPI BaseOutputPinImpl_EndFlush(IPin * iface)
 555 {
 556     TRACE("(%p)->()\n", iface);
 557
 558     /* not supposed to do anything in an output pin */
 559
 560     return E_UNEXPECTED;
 561 }
 562
 563 static const IPinVtbl OutputPin_Vtbl =
 564 {
 565     BaseOutputPinImpl_QueryInterface,
 566     BasePinImpl_AddRef,
 567     BaseOutputPinImpl_Release,
 568     BaseOutputPinImpl_Connect,
 569     BaseOutputPinImpl_ReceiveConnection,
 570     BaseOutputPinImpl_Disconnect,
 571     BasePinImpl_ConnectedTo,
 572     BasePinImpl_ConnectionMediaType,
 573     BasePinImpl_QueryPinInfo,
 574     BasePinImpl_QueryDirection,
 575     BasePinImpl_QueryId,
 576     BasePinImpl_QueryAccept,
 577     BasePinImpl_EnumMediaTypes,
 578     BasePinImpl_QueryInternalConnections,
 579     BaseOutputPinImpl_EndOfStream,
 580     BaseOutputPinImpl_BeginFlush,
 581     BaseOutputPinImpl_EndFlush,
 582     BasePinImpl_NewSegment
 583 };
 584
 585 HRESULT WINAPI BaseOutputPinImpl_GetDeliveryBuffer(BaseOutputPin *This, IMediaSample ** ppSample, REFERENCE_TIME * tStart, REFERENCE_TIME * tStop, DWORD dwFlags)
 586 {
 587     HRESULT hr;
 588
 589     TRACE("(%p, %p, %p, %x)\n", ppSample, tStart, tStop, dwFlags);
 590
 591     if (!This->pin.pConnectedTo)
 592         hr = VFW_E_NOT_CONNECTED;
 593     else
 594     {
 595         hr = IMemAllocator_GetBuffer(This->pAllocator, ppSample, tStart, tStop, dwFlags);
 596
 597         if (SUCCEEDED(hr))
 598             hr = IMediaSample_SetTime(*ppSample, tStart, tStop);
 599     }
 600
 601     return hr;
 602 }
 603
 604 /* replaces OutputPin_SendSample */
 605 HRESULT WINAPI BaseOutputPinImpl_Deliver(BaseOutputPin *This, IMediaSample * pSample)
 606 {
 607     HRESULT hr = S_OK;
 608     IMemInputPin * pMemConnected = NULL;
 609     PIN_INFO pinInfo;
 610
 611     EnterCriticalSection(This->pin.pCritSec);
 612     {
 613         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 614             hr = VFW_E_NOT_CONNECTED;
 615         else
 616         {
 617             /* we don't have the lock held when using This->pMemInputPin,
 618              * so we need to AddRef it to stop it being deleted while we are
 619              * using it. Same with its filter. */
 620             pMemConnected = This->pMemInputPin;
 621             IMemInputPin_AddRef(pMemConnected);
 622             hr = IPin_QueryPinInfo(This->pin.pConnectedTo, &pinInfo);
 623         }
 624     }
 625     LeaveCriticalSection(This->pin.pCritSec);
 626
 627     if (SUCCEEDED(hr))
 628     {
 629         /* NOTE: if we are in a critical section when Receive is called
 630          * then it causes some problems (most notably with the native Video
 631          * Renderer) if we are re-entered for whatever reason */
 632         hr = IMemInputPin_Receive(pMemConnected, pSample);
 633
 634         /* If the filter's destroyed, tell upstream to stop sending data */
 635         if(IBaseFilter_Release(pinInfo.pFilter) == 0 && SUCCEEDED(hr))
 636             hr = S_FALSE;
 637     }
 638     if (pMemConnected)
 639         IMemInputPin_Release(pMemConnected);
 640
 641     return hr;
 642 }
 643
 644 /* replaces OutputPin_CommitAllocator */
 645 HRESULT WINAPI BaseOutputPinImpl_Active(BaseOutputPin *This)
 646 {
 647     HRESULT hr = S_OK;
 648
 649     TRACE("(%p)->()\n", This);
 650
 651     EnterCriticalSection(This->pin.pCritSec);
 652     {
 653         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 654             hr = VFW_E_NOT_CONNECTED;
 655         else
 656             hr = IMemAllocator_Commit(This->pAllocator);
 657     }
 658     LeaveCriticalSection(This->pin.pCritSec);
 659
 660     TRACE("--> %08x\n", hr);
 661     return hr;
 662 }
 663
 664 /* replaces OutputPin_DecommitAllocator */
 665 HRESULT WINAPI BaseOutputPinImpl_Inactive(BaseOutputPin *This)
 666 {
 667     HRESULT hr = S_OK;
 668
 669     TRACE("(%p)->()\n", This);
 670
 671     EnterCriticalSection(This->pin.pCritSec);
 672     {
 673         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 674             hr = VFW_E_NOT_CONNECTED;
 675         else
 676             hr = IMemAllocator_Decommit(This->pAllocator);
 677     }
 678     LeaveCriticalSection(This->pin.pCritSec);
 679
 680     TRACE("--> %08x\n", hr);
 681     return hr;
 682 }
 683
 684 /* replaces OutputPin_DeliverDisconnect */
 685 HRESULT WINAPI BaseOutputPinImpl_BreakConnect(BaseOutputPin *This)
 686 {
 687     HRESULT hr;
 688
 689     TRACE("(%p)->()\n", This);
 690
 691     EnterCriticalSection(This->pin.pCritSec);
 692     {
 693         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 694             hr = VFW_E_NOT_CONNECTED;
 695         else
 696         {
 697             hr = IMemAllocator_Decommit(This->pAllocator);
 698
 699             if (SUCCEEDED(hr))
 700                 hr = IPin_Disconnect(This->pin.pConnectedTo);
 701         }
 702         IPin_Disconnect(&This->pin.IPin_iface);
 703     }
 704     LeaveCriticalSection(This->pin.pCritSec);
 705
 706     return hr;
 707 }
 708
 709 HRESULT WINAPI BaseOutputPinImpl_InitAllocator(BaseOutputPin *This, IMemAllocator **pMemAlloc)
 710 {
 711     return CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC_SERVER, &IID_IMemAllocator, (LPVOID*)pMemAlloc);
 712 }
 713
 714 HRESULT WINAPI BaseOutputPinImpl_DecideAllocator(BaseOutputPin *This, IMemInputPin *pPin, IMemAllocator **pAlloc)
 715 {
 716     HRESULT hr;
 717
 718     hr = IMemInputPin_GetAllocator(pPin, pAlloc);
 719
 720     if (hr == VFW_E_NO_ALLOCATOR)
 721         /* Input pin provides no allocator, use standard memory allocator */
 722         hr = BaseOutputPinImpl_InitAllocator(This, pAlloc);
 723
 724     if (SUCCEEDED(hr))
 725     {
 726         ALLOCATOR_PROPERTIES rProps;
 727         ZeroMemory(&rProps, sizeof(ALLOCATOR_PROPERTIES));
 728
 729         IMemInputPin_GetAllocatorRequirements(pPin, &rProps);
 730         hr = This->pFuncsTable->pfnDecideBufferSize(This, *pAlloc, &rProps);
 731     }
 732
 733     if (SUCCEEDED(hr))
 734         hr = IMemInputPin_NotifyAllocator(pPin, *pAlloc, FALSE);
 735
 736     return hr;
 737 }
 738
 739 /*** The Construct functions ***/
 740
 741 /* Function called as a helper to IPin_Connect */
 742 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 743 HRESULT WINAPI BaseOutputPinImpl_AttemptConnection(BasePin* iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 744 {
 745     BaseOutputPin *This = impl_BaseOutputPin_from_BasePin(iface);
 746     HRESULT hr;
 747     IMemAllocator * pMemAlloc = NULL;
 748
 749     TRACE("(%p, %p)\n", pReceivePin, pmt);
 750     dump_AM_MEDIA_TYPE(pmt);
 751
 752     /* FIXME: call queryacceptproc */
 753
 754     This->pin.pConnectedTo = pReceivePin;
 755     IPin_AddRef(pReceivePin);
 756     CopyMediaType(&This->pin.mtCurrent, pmt);
 757
 758     hr = IPin_ReceiveConnection(pReceivePin, &iface->IPin_iface, pmt);
 759
 760     /* get the IMemInputPin interface we will use to deliver samples to the
 761      * connected pin */
 762     if (SUCCEEDED(hr))
 763     {
 764         This->pMemInputPin = NULL;
 765         hr = IPin_QueryInterface(pReceivePin, &IID_IMemInputPin, (LPVOID)&This->pMemInputPin);
 766
 767         if (SUCCEEDED(hr))
 768         {
 769             hr = This->pFuncsTable->pfnDecideAllocator(This, This->pMemInputPin, &pMemAlloc);
 770             if (SUCCEEDED(hr))
 771                 This->pAllocator = pMemAlloc;
 772             else if (pMemAlloc)
 773                 IMemAllocator_Release(pMemAlloc);
 774         }
 775
 776         /* break connection if we couldn't get the allocator */
 777         if (FAILED(hr))
 778         {
 779             if (This->pMemInputPin)
 780                 IMemInputPin_Release(This->pMemInputPin);
 781             This->pMemInputPin = NULL;
 782
 783             IPin_Disconnect(pReceivePin);
 784         }
 785     }
 786
 787     if (FAILED(hr))
 788     {
 789         IPin_Release(This->pin.pConnectedTo);
 790         This->pin.pConnectedTo = NULL;
 791         FreeMediaType(&This->pin.mtCurrent);
 792     }
 793
 794     TRACE(" -- %x\n", hr);
 795     return hr;
 796 }
 797
 798 static HRESULT OutputPin_Init(const IPinVtbl *OutputPin_Vtbl, const PIN_INFO * pPinInfo, const BaseOutputPinFuncTable* vtbl,  LPCRITICAL_SECTION pCritSec, BaseOutputPin * pPinImpl)
 799 {
 800     TRACE("\n");
 801
 802     /* Common attributes */
 803     pPinImpl->pin.IPin_iface.lpVtbl = OutputPin_Vtbl;
 804     pPinImpl->pin.refCount = 1;
 805     pPinImpl->pin.pConnectedTo = NULL;
 806     pPinImpl->pin.pCritSec = pCritSec;
 807     pPinImpl->pin.tStart = 0;
 808     pPinImpl->pin.tStop = 0;
 809     pPinImpl->pin.dRate = 1.0;
 810     Copy_PinInfo(&pPinImpl->pin.pinInfo, pPinInfo);
 811     pPinImpl->pin.pFuncsTable = &vtbl->base;
 812     ZeroMemory(&pPinImpl->pin.mtCurrent, sizeof(AM_MEDIA_TYPE));
 813
 814     /* Output pin attributes */
 815     pPinImpl->pMemInputPin = NULL;
 816     pPinImpl->pAllocator = NULL;
 817     pPinImpl->pFuncsTable = vtbl;
 818
 819     return S_OK;
 820 }
 821
 822 HRESULT WINAPI BaseOutputPin_Construct(const IPinVtbl *OutputPin_Vtbl, LONG outputpin_size, const PIN_INFO * pPinInfo, const BaseOutputPinFuncTable* vtbl, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 823 {
 824     BaseOutputPin * pPinImpl;
 825
 826     *ppPin = NULL;
 827
 828     if (pPinInfo->dir != PINDIR_OUTPUT)
 829     {
 830         ERR("Pin direction(%x) != PINDIR_OUTPUT\n", pPinInfo->dir);
 831         return E_INVALIDARG;
 832     }
 833
 834     assert(outputpin_size >= sizeof(BaseOutputPin));
 835     assert(vtbl->base.pfnAttemptConnection);
 836
 837     pPinImpl = CoTaskMemAlloc(outputpin_size);
 838
 839     if (!pPinImpl)
 840         return E_OUTOFMEMORY;
 841
 842     if (SUCCEEDED(OutputPin_Init(OutputPin_Vtbl, pPinInfo, vtbl, pCritSec, pPinImpl)))
 843     {
 844         *ppPin = &pPinImpl->pin.IPin_iface;
 845         return S_OK;
 846     }
 847
 848     CoTaskMemFree(pPinImpl);
 849     return E_FAIL;
 850 }
 851
 852 /*** Input Pin implementation ***/
 853
 854 static inline BaseInputPin *impl_BaseInputPin_from_IPin( IPin *iface )
 855 {
 856     return CONTAINING_RECORD(iface, BaseInputPin, pin.IPin_iface);
 857 }
 858
 859 static inline BaseInputPin *impl_BaseInputPin_from_BasePin( BasePin *iface )
 860 {
 861     return CONTAINING_RECORD(iface, BaseInputPin, pin);
 862 }
 863
 864 HRESULT WINAPI BaseInputPinImpl_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 865 {
 866     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
 867
 868     TRACE("(%p)->(%s, %p)\n", iface, debugstr_guid(riid), ppv);
 869
 870     *ppv = NULL;
 871
 872     if (IsEqualIID(riid, &IID_IUnknown))
 873         *ppv = iface;
 874     else if (IsEqualIID(riid, &IID_IPin))
 875         *ppv = iface;
 876     else if (IsEqualIID(riid, &IID_IMemInputPin))
 877         *ppv = &This->IMemInputPin_iface;
 878     else if (IsEqualIID(riid, &IID_IMediaSeeking))
 879     {
 880         return IBaseFilter_QueryInterface(This->pin.pinInfo.pFilter, &IID_IMediaSeeking, ppv);
 881     }
 882
 883     if (*ppv)
 884     {
 885         IUnknown_AddRef((IUnknown *)(*ppv));
 886         return S_OK;
 887     }
 888
 889     FIXME("No interface for %s!\n", debugstr_guid(riid));
 890
 891     return E_NOINTERFACE;
 892 }
 893
 894 ULONG WINAPI BaseInputPinImpl_Release(IPin * iface)
 895 {
 896     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
 897     ULONG refCount = InterlockedDecrement(&This->pin.refCount);
 898
 899     TRACE("(%p)->() Release from %d\n", iface, refCount + 1);
 900
 901     if (!refCount)
 902     {
 903         FreeMediaType(&This->pin.mtCurrent);
 904         if (This->pAllocator)
 905             IMemAllocator_Release(This->pAllocator);
 906         This->pAllocator = NULL;
 907         This->pin.IPin_iface.lpVtbl = NULL;
 908         CoTaskMemFree(This);
 909         return 0;
 910     }
 911     else
 912         return refCount;
 913 }
 914
 915 HRESULT WINAPI BaseInputPinImpl_Connect(IPin * iface, IPin * pConnector, const AM_MEDIA_TYPE * pmt)
 916 {
 917     ERR("Outgoing connection on an input pin! (%p, %p)\n", pConnector, pmt);
 918
 919     return E_UNEXPECTED;
 920 }
 921
 922
 923 HRESULT WINAPI BaseInputPinImpl_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 924 {
 925     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
 926     PIN_DIRECTION pindirReceive;
 927     HRESULT hr = S_OK;
 928
 929     TRACE("(%p, %p)\n", pReceivePin, pmt);
 930     dump_AM_MEDIA_TYPE(pmt);
 931
 932     EnterCriticalSection(This->pin.pCritSec);
 933     {
 934         if (This->pin.pConnectedTo)
 935             hr = VFW_E_ALREADY_CONNECTED;
 936
 937         if (SUCCEEDED(hr) && This->pin.pFuncsTable->pfnCheckMediaType(&This->pin, pmt) != S_OK)
 938             hr = VFW_E_TYPE_NOT_ACCEPTED; /* FIXME: shouldn't we just map common errors onto
 939                                            * VFW_E_TYPE_NOT_ACCEPTED and pass the value on otherwise? */
 940
 941         if (SUCCEEDED(hr))
 942         {
 943             IPin_QueryDirection(pReceivePin, &pindirReceive);
 944
 945             if (pindirReceive != PINDIR_OUTPUT)
 946             {
 947                 ERR("Can't connect from non-output pin\n");
 948                 hr = VFW_E_INVALID_DIRECTION;
 949             }
 950         }
 951
 952         if (SUCCEEDED(hr))
 953         {
 954             CopyMediaType(&This->pin.mtCurrent, pmt);
 955             This->pin.pConnectedTo = pReceivePin;
 956             IPin_AddRef(pReceivePin);
 957         }
 958     }
 959     LeaveCriticalSection(This->pin.pCritSec);
 960
 961     return hr;
 962 }
 963
 964 static HRESULT deliver_endofstream(IPin* pin, LPVOID unused)
 965 {
 966     return IPin_EndOfStream( pin );
 967 }
 968
 969 HRESULT WINAPI BaseInputPinImpl_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt)
 970 {
 971     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
 972
 973     TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
 974
 975     return (This->pin.pFuncsTable->pfnCheckMediaType(&This->pin, pmt) == S_OK ? S_OK : S_FALSE);
 976 }
 977
 978 HRESULT WINAPI BaseInputPinImpl_EndOfStream(IPin * iface)
 979 {
 980     HRESULT hr = S_OK;
 981     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
 982
 983     TRACE("(%p)\n", This);
 984
 985     EnterCriticalSection(This->pin.pCritSec);
 986     if (This->flushing)
 987         hr = S_FALSE;
 988     else
 989         This->end_of_stream = TRUE;
 990     LeaveCriticalSection(This->pin.pCritSec);
 991
 992     if (hr == S_OK)
 993         hr = SendFurther( iface, deliver_endofstream, NULL, NULL );
 994     return hr;
 995 }
 996
 997 static HRESULT deliver_beginflush(IPin* pin, LPVOID unused)
 998 {
 999     return IPin_BeginFlush( pin );
1000 }
1001
1002 HRESULT WINAPI BaseInputPinImpl_BeginFlush(IPin * iface)
1003 {
1004     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
1005     HRESULT hr;
1006     TRACE("() semi-stub\n");
1007
1008     EnterCriticalSection(This->pin.pCritSec);
1009     This->flushing = TRUE;
1010
1011     hr = SendFurther( iface, deliver_beginflush, NULL, NULL );
1012     LeaveCriticalSection(This->pin.pCritSec);
1013
1014     return hr;
1015 }
1016
1017 static HRESULT deliver_endflush(IPin* pin, LPVOID unused)
1018 {
1019     return IPin_EndFlush( pin );
1020 }
1021
1022 HRESULT WINAPI BaseInputPinImpl_EndFlush(IPin * iface)
1023 {
1024     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
1025     HRESULT hr;
1026     TRACE("(%p)\n", This);
1027
1028     EnterCriticalSection(This->pin.pCritSec);
1029     This->flushing = This->end_of_stream = FALSE;
1030
1031     hr = SendFurther( iface, deliver_endflush, NULL, NULL );
1032     LeaveCriticalSection(This->pin.pCritSec);
1033
1034     return hr;
1035 }
1036
1037 typedef struct newsegmentargs
1038 {
1039     REFERENCE_TIME tStart, tStop;
1040     double rate;
1041 } newsegmentargs;
1042
1043 static HRESULT deliver_newsegment(IPin *pin, LPVOID data)
1044 {
1045     newsegmentargs *args = data;
1046     return IPin_NewSegment(pin, args->tStart, args->tStop, args->rate);
1047 }
1048
1049 HRESULT WINAPI BaseInputPinImpl_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
1050 {
1051     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
1052     newsegmentargs args;
1053
1054     TRACE("(%x%08x, %x%08x, %e)\n", (ULONG)(tStart >> 32), (ULONG)tStart, (ULONG)(tStop >> 32), (ULONG)tStop, dRate);
1055
1056     args.tStart = This->pin.tStart = tStart;
1057     args.tStop = This->pin.tStop = tStop;
1058     args.rate = This->pin.dRate = dRate;
1059
1060     return SendFurther( iface, deliver_newsegment, &args, NULL );
1061 }
1062
1063 static const IPinVtbl InputPin_Vtbl =
1064 {
1065     BaseInputPinImpl_QueryInterface,
1066     BasePinImpl_AddRef,
1067     BaseInputPinImpl_Release,
1068     BaseInputPinImpl_Connect,
1069     BaseInputPinImpl_ReceiveConnection,
1070     BasePinImpl_Disconnect,
1071     BasePinImpl_ConnectedTo,
1072     BasePinImpl_ConnectionMediaType,
1073     BasePinImpl_QueryPinInfo,
1074     BasePinImpl_QueryDirection,
1075     BasePinImpl_QueryId,
1076     BaseInputPinImpl_QueryAccept,
1077     BasePinImpl_EnumMediaTypes,
1078     BasePinImpl_QueryInternalConnections,
1079     BaseInputPinImpl_EndOfStream,
1080     BaseInputPinImpl_BeginFlush,
1081     BaseInputPinImpl_EndFlush,
1082     BaseInputPinImpl_NewSegment
1083 };
1084
1085 /*** IMemInputPin implementation ***/
1086
1087 static inline BaseInputPin *impl_from_IMemInputPin( IMemInputPin *iface )
1088 {
1089     return CONTAINING_RECORD(iface, BaseInputPin, IMemInputPin_iface);
1090 }
1091
1092 static HRESULT WINAPI MemInputPin_QueryInterface(IMemInputPin * iface, REFIID riid, LPVOID * ppv)
1093 {
1094     BaseInputPin *This = impl_from_IMemInputPin(iface);
1095
1096     return IPin_QueryInterface(&This->pin.IPin_iface, riid, ppv);
1097 }
1098
1099 static ULONG WINAPI MemInputPin_AddRef(IMemInputPin * iface)
1100 {
1101     BaseInputPin *This = impl_from_IMemInputPin(iface);
1102
1103     return IPin_AddRef(&This->pin.IPin_iface);
1104 }
1105
1106 static ULONG WINAPI MemInputPin_Release(IMemInputPin * iface)
1107 {
1108     BaseInputPin *This = impl_from_IMemInputPin(iface);
1109
1110     return IPin_Release(&This->pin.IPin_iface);
1111 }
1112
1113 static HRESULT WINAPI MemInputPin_GetAllocator(IMemInputPin * iface, IMemAllocator ** ppAllocator)
1114 {
1115     BaseInputPin *This = impl_from_IMemInputPin(iface);
1116
1117     TRACE("(%p/%p)->(%p)\n", This, iface, ppAllocator);
1118
1119     *ppAllocator = This->pAllocator;
1120     if (*ppAllocator)
1121         IMemAllocator_AddRef(*ppAllocator);
1122
1123     return *ppAllocator ? S_OK : VFW_E_NO_ALLOCATOR;
1124 }
1125
1126 static HRESULT WINAPI MemInputPin_NotifyAllocator(IMemInputPin * iface, IMemAllocator * pAllocator, BOOL bReadOnly)
1127 {
1128     BaseInputPin *This = impl_from_IMemInputPin(iface);
1129
1130     TRACE("(%p/%p)->(%p, %d)\n", This, iface, pAllocator, bReadOnly);
1131
1132     if (bReadOnly)
1133         FIXME("Read only flag not handled yet!\n");
1134
1135     /* FIXME: Should we release the allocator on disconnection? */
1136     if (!pAllocator)
1137     {
1138         WARN("Null allocator\n");
1139         return E_POINTER;
1140     }
1141
1142     if (This->preferred_allocator && pAllocator != This->preferred_allocator)
1143         return E_FAIL;
1144
1145     if (This->pAllocator)
1146         IMemAllocator_Release(This->pAllocator);
1147     This->pAllocator = pAllocator;
1148     if (This->pAllocator)
1149         IMemAllocator_AddRef(This->pAllocator);
1150
1151     return S_OK;
1152 }
1153
1154 static HRESULT WINAPI MemInputPin_GetAllocatorRequirements(IMemInputPin * iface, ALLOCATOR_PROPERTIES * pProps)
1155 {
1156     BaseInputPin *This = impl_from_IMemInputPin(iface);
1157
1158     TRACE("(%p/%p)->(%p)\n", This, iface, pProps);
1159
1160     /* override this method if you have any specific requirements */
1161
1162     return E_NOTIMPL;
1163 }
1164
1165 static HRESULT WINAPI MemInputPin_Receive(IMemInputPin * iface, IMediaSample * pSample)
1166 {
1167     BaseInputPin *This = impl_from_IMemInputPin(iface);
1168     HRESULT hr = S_FALSE;
1169
1170     /* this trace commented out for performance reasons */
1171     /*TRACE("(%p/%p)->(%p)\n", This, iface, pSample);*/
1172     if (This->pFuncsTable->pfnReceive)
1173         hr = This->pFuncsTable->pfnReceive(This, pSample);
1174     return hr;
1175 }
1176
1177 static HRESULT WINAPI MemInputPin_ReceiveMultiple(IMemInputPin * iface, IMediaSample ** pSamples, LONG nSamples, LONG *nSamplesProcessed)
1178 {
1179     HRESULT hr = S_OK;
1180     BaseInputPin *This = impl_from_IMemInputPin(iface);
1181
1182     TRACE("(%p/%p)->(%p, %d, %p)\n", This, iface, pSamples, nSamples, nSamplesProcessed);
1183
1184     for (*nSamplesProcessed = 0; *nSamplesProcessed < nSamples; (*nSamplesProcessed)++)
1185     {
1186         hr = IMemInputPin_Receive(iface, pSamples[*nSamplesProcessed]);
1187         if (hr != S_OK)
1188             break;
1189     }
1190
1191     return hr;
1192 }
1193
1194 static HRESULT WINAPI MemInputPin_ReceiveCanBlock(IMemInputPin * iface)
1195 {
1196     BaseInputPin *This = impl_from_IMemInputPin(iface);
1197
1198     TRACE("(%p/%p)->()\n", This, iface);
1199
1200     return S_OK;
1201 }
1202
1203 static const IMemInputPinVtbl MemInputPin_Vtbl =
1204 {
1205     MemInputPin_QueryInterface,
1206     MemInputPin_AddRef,
1207     MemInputPin_Release,
1208     MemInputPin_GetAllocator,
1209     MemInputPin_NotifyAllocator,
1210     MemInputPin_GetAllocatorRequirements,
1211     MemInputPin_Receive,
1212     MemInputPin_ReceiveMultiple,
1213     MemInputPin_ReceiveCanBlock
1214 };
1215
1216 static HRESULT InputPin_Init(const IPinVtbl *InputPin_Vtbl, const PIN_INFO * pPinInfo,
1217                              const BaseInputPinFuncTable* vtbl,
1218                              LPCRITICAL_SECTION pCritSec, IMemAllocator *allocator, BaseInputPin * pPinImpl)
1219 {
1220     TRACE("\n");
1221
1222     /* Common attributes */
1223     pPinImpl->pin.refCount = 1;
1224     pPinImpl->pin.pConnectedTo = NULL;
1225     pPinImpl->pin.pCritSec = pCritSec;
1226     pPinImpl->pin.tStart = 0;
1227     pPinImpl->pin.tStop = 0;
1228     pPinImpl->pin.dRate = 1.0;
1229     Copy_PinInfo(&pPinImpl->pin.pinInfo, pPinInfo);
1230     ZeroMemory(&pPinImpl->pin.mtCurrent, sizeof(AM_MEDIA_TYPE));
1231     pPinImpl->pin.pFuncsTable = &vtbl->base;
1232
1233     /* Input pin attributes */
1234     pPinImpl->pFuncsTable = vtbl;
1235     pPinImpl->pAllocator = pPinImpl->preferred_allocator = allocator;
1236     if (pPinImpl->preferred_allocator)
1237         IMemAllocator_AddRef(pPinImpl->preferred_allocator);
1238     pPinImpl->pin.IPin_iface.lpVtbl = InputPin_Vtbl;
1239     pPinImpl->IMemInputPin_iface.lpVtbl = &MemInputPin_Vtbl;
1240     pPinImpl->flushing = pPinImpl->end_of_stream = FALSE;
1241
1242     return S_OK;
1243 }
1244
1245 HRESULT BaseInputPin_Construct(const IPinVtbl *InputPin_Vtbl, LONG inputpin_size, const PIN_INFO * pPinInfo,
1246                                const BaseInputPinFuncTable* vtbl,
1247                                LPCRITICAL_SECTION pCritSec, IMemAllocator *allocator, IPin ** ppPin)
1248 {
1249     BaseInputPin * pPinImpl;
1250
1251     *ppPin = NULL;
1252
1253     assert(inputpin_size >= sizeof(BaseInputPin));
1254     assert(vtbl->base.pfnCheckMediaType);
1255
1256     if (pPinInfo->dir != PINDIR_INPUT)
1257     {
1258         ERR("Pin direction(%x) != PINDIR_INPUT\n", pPinInfo->dir);
1259         return E_INVALIDARG;
1260     }
1261
1262     pPinImpl = CoTaskMemAlloc(inputpin_size);
1263
1264     if (!pPinImpl)
1265         return E_OUTOFMEMORY;
1266
1267     if (SUCCEEDED(InputPin_Init(InputPin_Vtbl, pPinInfo, vtbl, pCritSec, allocator, pPinImpl)))
1268     {
1269         *ppPin = (IPin *)pPinImpl;
1270         return S_OK;
1271     }
1272
1273     CoTaskMemFree(pPinImpl);
1274     return E_FAIL;
1275 }