dlls/quartz/transform.c

   1 /*
   2  * Transform Filter (Base for decoders, etc...)
   3  *
   4  * Copyright 2005 Christian Costa
   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 "config.h"
  22
  23 #include "quartz_private.h"
  24 #include "control_private.h"
  25 #include "pin.h"
  26
  27 #include "amvideo.h"
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "dshow.h"
  31 #include "strmif.h"
  32 #include "vfw.h"
  33
  34 #include <assert.h>
  35
  36 #include "wine/unicode.h"
  37 #include "wine/debug.h"
  38
  39 #include "transform.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  42
  43 static const WCHAR wcsInputPinName[] = {'i','n','p','u','t',' ','p','i','n',0};
  44 static const WCHAR wcsOutputPinName[] = {'o','u','t','p','u','t',' ','p','i','n',0};
  45
  46 static const IBaseFilterVtbl TransformFilter_Vtbl;
  47 static const IPinVtbl TransformFilter_InputPin_Vtbl;
  48 static const IMemInputPinVtbl MemInputPin_Vtbl;
  49 static const IPinVtbl TransformFilter_OutputPin_Vtbl;
  50
  51 static HRESULT TransformFilter_Sample(LPVOID iface, IMediaSample * pSample)
  52 {
  53     TransformFilterImpl *This = (TransformFilterImpl *)iface;
  54
  55     TRACE("%p %p\n", iface, pSample);
  56
  57     return This->pFuncsTable->pfnProcessSampleData(This, pSample);
  58 }
  59
  60 static HRESULT TransformFilter_Input_QueryAccept(LPVOID iface, const AM_MEDIA_TYPE * pmt)
  61 {
  62     TransformFilterImpl* This = (TransformFilterImpl*)iface;
  63     TRACE("%p\n", iface);
  64     dump_AM_MEDIA_TYPE(pmt);
  65
  66     if (This->pFuncsTable->pfnQueryConnect)
  67         return This->pFuncsTable->pfnQueryConnect(This, pmt);
  68     /* Assume OK if there's no query method (the connection will fail if
  69        needed) */
  70     return S_OK;
  71 }
  72
  73
  74 static HRESULT TransformFilter_Output_QueryAccept(LPVOID iface, const AM_MEDIA_TYPE * pmt)
  75 {
  76     TransformFilterImpl* pTransformFilter = (TransformFilterImpl*)iface;
  77     AM_MEDIA_TYPE* outpmt = &((OutputPin*)pTransformFilter->ppPins[1])->pin.mtCurrent;
  78     TRACE("%p\n", iface);
  79
  80     if (IsEqualIID(&pmt->majortype, &outpmt->majortype) && IsEqualIID(&pmt->subtype, &outpmt->subtype))
  81         return S_OK;
  82     return S_FALSE;
  83 }
  84
  85 static HRESULT TransformFilter_InputPin_Construct(const PIN_INFO * pPinInfo, SAMPLEPROC pSampleProc, LPVOID pUserData, QUERYACCEPTPROC pQueryAccept, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
  86 {
  87     InputPin * pPinImpl;
  88
  89     *ppPin = NULL;
  90
  91     if (pPinInfo->dir != PINDIR_INPUT)
  92     {
  93         ERR("Pin direction(%x) != PINDIR_INPUT\n", pPinInfo->dir);
  94         return E_INVALIDARG;
  95     }
  96
  97     pPinImpl = CoTaskMemAlloc(sizeof(*pPinImpl));
  98
  99     if (!pPinImpl)
 100         return E_OUTOFMEMORY;
 101
 102     if (SUCCEEDED(InputPin_Init(pPinInfo, pSampleProc, pUserData, pQueryAccept, pCritSec, pPinImpl)))
 103     {
 104         pPinImpl->pin.lpVtbl = &TransformFilter_InputPin_Vtbl;
 105         pPinImpl->lpVtblMemInput = &MemInputPin_Vtbl;
 106
 107         *ppPin = (IPin *)(&pPinImpl->pin.lpVtbl);
 108         return S_OK;
 109     }
 110
 111     CoTaskMemFree(pPinImpl);
 112     return E_FAIL;
 113 }
 114
 115 static HRESULT TransformFilter_OutputPin_Construct(const PIN_INFO * pPinInfo, const ALLOCATOR_PROPERTIES *props,
 116                                                    LPVOID pUserData, QUERYACCEPTPROC pQueryAccept,
 117                                                    LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 118 {
 119     OutputPin * pPinImpl;
 120
 121     *ppPin = NULL;
 122
 123     if (pPinInfo->dir != PINDIR_OUTPUT)
 124     {
 125         ERR("Pin direction(%x) != PINDIR_OUTPUT\n", pPinInfo->dir);
 126         return E_INVALIDARG;
 127     }
 128
 129     pPinImpl = CoTaskMemAlloc(sizeof(*pPinImpl));
 130
 131     if (!pPinImpl)
 132         return E_OUTOFMEMORY;
 133
 134     if (SUCCEEDED(OutputPin_Init(pPinInfo, props, pUserData, pQueryAccept, pCritSec, pPinImpl)))
 135     {
 136         pPinImpl->pin.lpVtbl = &TransformFilter_OutputPin_Vtbl;
 137
 138         *ppPin = (IPin *)(&pPinImpl->pin.lpVtbl);
 139         return S_OK;
 140     }
 141
 142     CoTaskMemFree(pPinImpl);
 143     return E_FAIL;
 144 }
 145
 146 HRESULT TransformFilter_Create(TransformFilterImpl* pTransformFilter, const CLSID* pClsid, const TransformFuncsTable* pFuncsTable)
 147 {
 148     HRESULT hr;
 149     PIN_INFO piInput;
 150     PIN_INFO piOutput;
 151
 152     /* pTransformFilter is already allocated */
 153     pTransformFilter->clsid = *pClsid;
 154     pTransformFilter->pFuncsTable = pFuncsTable;
 155
 156     pTransformFilter->lpVtbl = &TransformFilter_Vtbl;
 157
 158     pTransformFilter->refCount = 1;
 159     InitializeCriticalSection(&pTransformFilter->csFilter);
 160     pTransformFilter->csFilter.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": TransformFilterImpl.csFilter");
 161     pTransformFilter->state = State_Stopped;
 162     pTransformFilter->pClock = NULL;
 163     ZeroMemory(&pTransformFilter->filterInfo, sizeof(FILTER_INFO));
 164
 165     pTransformFilter->ppPins = CoTaskMemAlloc(2 * sizeof(IPin *));
 166
 167     /* construct input pin */
 168     piInput.dir = PINDIR_INPUT;
 169     piInput.pFilter = (IBaseFilter *)pTransformFilter;
 170     lstrcpynW(piInput.achName, wcsInputPinName, sizeof(piInput.achName) / sizeof(piInput.achName[0]));
 171     piOutput.dir = PINDIR_OUTPUT;
 172     piOutput.pFilter = (IBaseFilter *)pTransformFilter;
 173     lstrcpynW(piOutput.achName, wcsOutputPinName, sizeof(piOutput.achName) / sizeof(piOutput.achName[0]));
 174
 175     hr = TransformFilter_InputPin_Construct(&piInput, TransformFilter_Sample, pTransformFilter, TransformFilter_Input_QueryAccept, &pTransformFilter->csFilter, &pTransformFilter->ppPins[0]);
 176
 177     if (SUCCEEDED(hr))
 178     {
 179         ALLOCATOR_PROPERTIES props;
 180         props.cbAlign = 1;
 181         props.cbPrefix = 0;
 182         props.cbBuffer = 0; /* Will be updated at connection time */
 183         props.cBuffers = 2;
 184
 185         hr = TransformFilter_OutputPin_Construct(&piOutput, &props, pTransformFilter, TransformFilter_Output_QueryAccept, &pTransformFilter->csFilter, &pTransformFilter->ppPins[1]);
 186
 187         if (FAILED(hr))
 188             ERR("Cannot create output pin (%x)\n", hr);
 189     }
 190     else
 191     {
 192         CoTaskMemFree(pTransformFilter->ppPins);
 193         pTransformFilter->csFilter.DebugInfo->Spare[0] = 0;
 194         DeleteCriticalSection(&pTransformFilter->csFilter);
 195         CoTaskMemFree(pTransformFilter);
 196     }
 197
 198     return hr;
 199 }
 200
 201 static HRESULT WINAPI TransformFilter_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
 202 {
 203     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 204     TRACE("(%p/%p)->(%s, %p)\n", This, iface, qzdebugstr_guid(riid), ppv);
 205
 206     *ppv = NULL;
 207
 208     if (IsEqualIID(riid, &IID_IUnknown))
 209         *ppv = (LPVOID)This;
 210     else if (IsEqualIID(riid, &IID_IPersist))
 211         *ppv = (LPVOID)This;
 212     else if (IsEqualIID(riid, &IID_IMediaFilter))
 213         *ppv = (LPVOID)This;
 214     else if (IsEqualIID(riid, &IID_IBaseFilter))
 215         *ppv = (LPVOID)This;
 216
 217     if (*ppv)
 218     {
 219         IUnknown_AddRef((IUnknown *)(*ppv));
 220         return S_OK;
 221     }
 222
 223     FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 224
 225     return E_NOINTERFACE;
 226 }
 227
 228 static ULONG WINAPI TransformFilter_AddRef(IBaseFilter * iface)
 229 {
 230     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 231     ULONG refCount = InterlockedIncrement(&This->refCount);
 232
 233     TRACE("(%p/%p)->() AddRef from %d\n", This, iface, refCount - 1);
 234
 235     return refCount;
 236 }
 237
 238 static ULONG WINAPI TransformFilter_Release(IBaseFilter * iface)
 239 {
 240     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 241     ULONG refCount = InterlockedDecrement(&This->refCount);
 242
 243     TRACE("(%p/%p)->() Release from %d\n", This, iface, refCount + 1);
 244
 245     if (!refCount)
 246     {
 247         ULONG i;
 248
 249         if (This->pClock)
 250             IReferenceClock_Release(This->pClock);
 251
 252         for (i = 0; i < 2; i++)
 253         {
 254             IPin *pConnectedTo;
 255
 256             if (SUCCEEDED(IPin_ConnectedTo(This->ppPins[i], &pConnectedTo)))
 257             {
 258                 IPin_Disconnect(pConnectedTo);
 259                 IPin_Release(pConnectedTo);
 260             }
 261             IPin_Disconnect(This->ppPins[i]);
 262
 263             IPin_Release(This->ppPins[i]);
 264         }
 265
 266         CoTaskMemFree(This->ppPins);
 267         This->lpVtbl = NULL;
 268
 269         This->csFilter.DebugInfo->Spare[0] = 0;
 270         DeleteCriticalSection(&This->csFilter);
 271
 272         TRACE("Destroying transform filter\n");
 273         CoTaskMemFree(This);
 274
 275         return 0;
 276     }
 277     else
 278         return refCount;
 279 }
 280
 281 /** IPersist methods **/
 282
 283 static HRESULT WINAPI TransformFilter_GetClassID(IBaseFilter * iface, CLSID * pClsid)
 284 {
 285     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 286
 287     TRACE("(%p/%p)->(%p)\n", This, iface, pClsid);
 288
 289     *pClsid = This->clsid;
 290
 291     return S_OK;
 292 }
 293
 294 /** IMediaFilter methods **/
 295
 296 static HRESULT WINAPI TransformFilter_Stop(IBaseFilter * iface)
 297 {
 298     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 299
 300     TRACE("(%p/%p)\n", This, iface);
 301
 302     EnterCriticalSection(&This->csFilter);
 303     {
 304         This->state = State_Stopped;
 305         if (This->pFuncsTable->pfnProcessEnd)
 306             This->pFuncsTable->pfnProcessEnd(This);
 307     }
 308     LeaveCriticalSection(&This->csFilter);
 309
 310     return S_OK;
 311 }
 312
 313 static HRESULT WINAPI TransformFilter_Pause(IBaseFilter * iface)
 314 {
 315     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 316
 317     TRACE("(%p/%p)->()\n", This, iface);
 318
 319     EnterCriticalSection(&This->csFilter);
 320     {
 321         This->state = State_Paused;
 322     }
 323     LeaveCriticalSection(&This->csFilter);
 324
 325     return S_OK;
 326 }
 327
 328 static HRESULT WINAPI TransformFilter_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
 329 {
 330     HRESULT hr = S_OK;
 331     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 332
 333     TRACE("(%p/%p)->(%s)\n", This, iface, wine_dbgstr_longlong(tStart));
 334
 335     EnterCriticalSection(&This->csFilter);
 336     {
 337         This->rtStreamStart = tStart;
 338         This->state = State_Running;
 339         OutputPin_CommitAllocator((OutputPin *)This->ppPins[1]);
 340         if (This->pFuncsTable->pfnProcessBegin)
 341             This->pFuncsTable->pfnProcessBegin(This);
 342     }
 343     LeaveCriticalSection(&This->csFilter);
 344
 345     return hr;
 346 }
 347
 348 static HRESULT WINAPI TransformFilter_GetState(IBaseFilter * iface, DWORD dwMilliSecsTimeout, FILTER_STATE *pState)
 349 {
 350     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 351
 352     TRACE("(%p/%p)->(%d, %p)\n", This, iface, dwMilliSecsTimeout, pState);
 353
 354     EnterCriticalSection(&This->csFilter);
 355     {
 356         *pState = This->state;
 357     }
 358     LeaveCriticalSection(&This->csFilter);
 359
 360     return S_OK;
 361 }
 362
 363 static HRESULT WINAPI TransformFilter_SetSyncSource(IBaseFilter * iface, IReferenceClock *pClock)
 364 {
 365     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 366
 367     TRACE("(%p/%p)->(%p)\n", This, iface, pClock);
 368
 369     EnterCriticalSection(&This->csFilter);
 370     {
 371         if (This->pClock)
 372             IReferenceClock_Release(This->pClock);
 373         This->pClock = pClock;
 374         if (This->pClock)
 375             IReferenceClock_AddRef(This->pClock);
 376     }
 377     LeaveCriticalSection(&This->csFilter);
 378
 379     return S_OK;
 380 }
 381
 382 static HRESULT WINAPI TransformFilter_GetSyncSource(IBaseFilter * iface, IReferenceClock **ppClock)
 383 {
 384     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 385
 386     TRACE("(%p/%p)->(%p)\n", This, iface, ppClock);
 387
 388     EnterCriticalSection(&This->csFilter);
 389     {
 390         *ppClock = This->pClock;
 391         IReferenceClock_AddRef(This->pClock);
 392     }
 393     LeaveCriticalSection(&This->csFilter);
 394
 395     return S_OK;
 396 }
 397
 398 /** IBaseFilter implementation **/
 399
 400 static HRESULT WINAPI TransformFilter_EnumPins(IBaseFilter * iface, IEnumPins **ppEnum)
 401 {
 402     ENUMPINDETAILS epd;
 403     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 404
 405     TRACE("(%p/%p)->(%p)\n", This, iface, ppEnum);
 406
 407     epd.cPins = 2; /* input and output pins */
 408     epd.ppPins = This->ppPins;
 409     return IEnumPinsImpl_Construct(&epd, ppEnum);
 410 }
 411
 412 static HRESULT WINAPI TransformFilter_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
 413 {
 414     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 415
 416     TRACE("(%p/%p)->(%p,%p)\n", This, iface, debugstr_w(Id), ppPin);
 417
 418     return E_NOTIMPL;
 419 }
 420
 421 static HRESULT WINAPI TransformFilter_QueryFilterInfo(IBaseFilter * iface, FILTER_INFO *pInfo)
 422 {
 423     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 424
 425     TRACE("(%p/%p)->(%p)\n", This, iface, pInfo);
 426
 427     strcpyW(pInfo->achName, This->filterInfo.achName);
 428     pInfo->pGraph = This->filterInfo.pGraph;
 429
 430     if (pInfo->pGraph)
 431         IFilterGraph_AddRef(pInfo->pGraph);
 432
 433     return S_OK;
 434 }
 435
 436 static HRESULT WINAPI TransformFilter_JoinFilterGraph(IBaseFilter * iface, IFilterGraph *pGraph, LPCWSTR pName)
 437 {
 438     HRESULT hr = S_OK;
 439     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 440
 441     TRACE("(%p/%p)->(%p, %s)\n", This, iface, pGraph, debugstr_w(pName));
 442
 443     EnterCriticalSection(&This->csFilter);
 444     {
 445         if (pName)
 446             strcpyW(This->filterInfo.achName, pName);
 447         else
 448             *This->filterInfo.achName = '\0';
 449         This->filterInfo.pGraph = pGraph; /* NOTE: do NOT increase ref. count */
 450     }
 451     LeaveCriticalSection(&This->csFilter);
 452
 453     return hr;
 454 }
 455
 456 static HRESULT WINAPI TransformFilter_QueryVendorInfo(IBaseFilter * iface, LPWSTR *pVendorInfo)
 457 {
 458     TransformFilterImpl *This = (TransformFilterImpl *)iface;
 459     TRACE("(%p/%p)->(%p)\n", This, iface, pVendorInfo);
 460     return E_NOTIMPL;
 461 }
 462
 463 static const IBaseFilterVtbl TransformFilter_Vtbl =
 464 {
 465     TransformFilter_QueryInterface,
 466     TransformFilter_AddRef,
 467     TransformFilter_Release,
 468     TransformFilter_GetClassID,
 469     TransformFilter_Stop,
 470     TransformFilter_Pause,
 471     TransformFilter_Run,
 472     TransformFilter_GetState,
 473     TransformFilter_SetSyncSource,
 474     TransformFilter_GetSyncSource,
 475     TransformFilter_EnumPins,
 476     TransformFilter_FindPin,
 477     TransformFilter_QueryFilterInfo,
 478     TransformFilter_JoinFilterGraph,
 479     TransformFilter_QueryVendorInfo
 480 };
 481
 482 static HRESULT WINAPI TransformFilter_InputPin_EndOfStream(IPin * iface)
 483 {
 484     InputPin* This = (InputPin*) iface;
 485     TransformFilterImpl* pTransform;
 486     IPin* ppin;
 487     HRESULT hr;
 488
 489     TRACE("(%p)->()\n", iface);
 490
 491     /* Since we process samples synchronously, just forward notification downstream */
 492     pTransform = (TransformFilterImpl*)This->pin.pinInfo.pFilter;
 493     if (!pTransform)
 494         hr = E_FAIL;
 495     else
 496         hr = IPin_ConnectedTo(pTransform->ppPins[1], &ppin);
 497     if (SUCCEEDED(hr))
 498     {
 499         hr = IPin_EndOfStream(ppin);
 500         IPin_Release(ppin);
 501     }
 502
 503     if (FAILED(hr))
 504         ERR("%x\n", hr);
 505     return hr;
 506 }
 507
 508 static HRESULT WINAPI TransformFilter_InputPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 509 {
 510     InputPin* This = (InputPin*) iface;
 511     TransformFilterImpl* pTransform;
 512     HRESULT hr;
 513
 514     TRACE("(%p)->(%p, %p)\n", iface, pReceivePin, pmt);
 515
 516     pTransform = (TransformFilterImpl*)This->pin.pinInfo.pFilter;
 517
 518     hr = pTransform->pFuncsTable->pfnConnectInput(pTransform, pmt);
 519     if (SUCCEEDED(hr))
 520     {
 521         hr = InputPin_ReceiveConnection(iface, pReceivePin, pmt);
 522         if (FAILED(hr))
 523             pTransform->pFuncsTable->pfnCleanup(pTransform);
 524     }
 525
 526     return hr;
 527 }
 528
 529 static HRESULT WINAPI TransformFilter_InputPin_Disconnect(IPin * iface)
 530 {
 531     InputPin* This = (InputPin*) iface;
 532     TransformFilterImpl* pTransform;
 533
 534     TRACE("(%p)->()\n", iface);
 535
 536     pTransform = (TransformFilterImpl*)This->pin.pinInfo.pFilter;
 537     pTransform->pFuncsTable->pfnCleanup(pTransform);
 538
 539     return IPinImpl_Disconnect(iface);
 540 }
 541
 542 static const IPinVtbl TransformFilter_InputPin_Vtbl =
 543 {
 544     InputPin_QueryInterface,
 545     IPinImpl_AddRef,
 546     InputPin_Release,
 547     InputPin_Connect,
 548     TransformFilter_InputPin_ReceiveConnection,
 549     TransformFilter_InputPin_Disconnect,
 550     IPinImpl_ConnectedTo,
 551     IPinImpl_ConnectionMediaType,
 552     IPinImpl_QueryPinInfo,
 553     IPinImpl_QueryDirection,
 554     IPinImpl_QueryId,
 555     IPinImpl_QueryAccept,
 556     IPinImpl_EnumMediaTypes,
 557     IPinImpl_QueryInternalConnections,
 558     TransformFilter_InputPin_EndOfStream,
 559     InputPin_BeginFlush,
 560     InputPin_EndFlush,
 561     InputPin_NewSegment
 562 };
 563
 564 static HRESULT WINAPI TransformFilter_Output_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum)
 565 {
 566     IPinImpl *This = (IPinImpl *)iface;
 567     ENUMMEDIADETAILS emd;
 568
 569     TRACE("(%p/%p)->(%p)\n", This, iface, ppEnum);
 570
 571     emd.cMediaTypes = 1;
 572     emd.pMediaTypes = &This->mtCurrent;
 573
 574     return IEnumMediaTypesImpl_Construct(&emd, ppEnum);
 575 }
 576
 577 static const IPinVtbl TransformFilter_OutputPin_Vtbl =
 578 {
 579     OutputPin_QueryInterface,
 580     IPinImpl_AddRef,
 581     OutputPin_Release,
 582     OutputPin_Connect,
 583     OutputPin_ReceiveConnection,
 584     OutputPin_Disconnect,
 585     IPinImpl_ConnectedTo,
 586     IPinImpl_ConnectionMediaType,
 587     IPinImpl_QueryPinInfo,
 588     IPinImpl_QueryDirection,
 589     IPinImpl_QueryId,
 590     IPinImpl_QueryAccept,
 591     TransformFilter_Output_EnumMediaTypes,
 592     IPinImpl_QueryInternalConnections,
 593     OutputPin_EndOfStream,
 594     OutputPin_BeginFlush,
 595     OutputPin_EndFlush,
 596     OutputPin_NewSegment
 597 };
 598
 599 static const IMemInputPinVtbl MemInputPin_Vtbl =
 600 {
 601     MemInputPin_QueryInterface,
 602     MemInputPin_AddRef,
 603     MemInputPin_Release,
 604     MemInputPin_GetAllocator,
 605     MemInputPin_NotifyAllocator,
 606     MemInputPin_GetAllocatorRequirements,
 607     MemInputPin_Receive,
 608     MemInputPin_ReceiveMultiple,
 609     MemInputPin_ReceiveCanBlock
 610 };