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