dlls/qedit/mediadet.c

   1 /*              DirectShow Media Detector object (QEDIT.DLL)
   2  *
   3  * Copyright 2008 Google (Lei Zhang, Dan Hipschman)
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include <assert.h>
  21 #include <stdarg.h>
  22
  23 #define COBJMACROS
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "winuser.h"
  28 #include "ole2.h"
  29
  30 #include "qedit_private.h"
  31 #include "wine/debug.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  34
  35 typedef struct MediaDetImpl {
  36     IUnknown IUnknown_inner;
  37     IMediaDet IMediaDet_iface;
  38     IUnknown *outer_unk;
  39     LONG ref;
  40     IGraphBuilder *graph;
  41     IBaseFilter *source;
  42     IBaseFilter *splitter;
  43     WCHAR *filename;
  44     LONG num_streams;
  45     LONG cur_stream;
  46     IPin *cur_pin;
  47 } MediaDetImpl;
  48
  49 static inline MediaDetImpl *impl_from_IUnknown(IUnknown *iface)
  50 {
  51     return CONTAINING_RECORD(iface, MediaDetImpl, IUnknown_inner);
  52 }
  53
  54 static inline MediaDetImpl *impl_from_IMediaDet(IMediaDet *iface)
  55 {
  56     return CONTAINING_RECORD(iface, MediaDetImpl, IMediaDet_iface);
  57 }
  58
  59 static void MD_cleanup(MediaDetImpl *This)
  60 {
  61     if (This->cur_pin) IPin_Release(This->cur_pin);
  62     This->cur_pin = NULL;
  63     if (This->source) IBaseFilter_Release(This->source);
  64     This->source = NULL;
  65     if (This->splitter) IBaseFilter_Release(This->splitter);
  66     This->splitter = NULL;
  67     if (This->graph) IGraphBuilder_Release(This->graph);
  68     This->graph = NULL;
  69     free(This->filename);
  70     This->filename = NULL;
  71     This->num_streams = -1;
  72     This->cur_stream = 0;
  73 }
  74
  75 static HRESULT get_filter_info(IMoniker *moniker, GUID *clsid, VARIANT *var)
  76 {
  77     IPropertyBag *prop_bag;
  78     HRESULT hr;
  79
  80     if (FAILED(hr = IMoniker_BindToStorage(moniker, NULL, NULL, &IID_IPropertyBag, (void **)&prop_bag)))
  81     {
  82         ERR("Failed to get property bag, hr %#x.\n", hr);
  83         return hr;
  84     }
  85
  86     VariantInit(var);
  87     V_VT(var) = VT_BSTR;
  88     if (FAILED(hr = IPropertyBag_Read(prop_bag, L"CLSID", var, NULL)))
  89     {
  90         ERR("Failed to get CLSID, hr %#x.\n", hr);
  91         IPropertyBag_Release(prop_bag);
  92         return hr;
  93     }
  94     CLSIDFromString(V_BSTR(var), clsid);
  95     VariantClear(var);
  96
  97     if (FAILED(hr = IPropertyBag_Read(prop_bag, L"FriendlyName", var, NULL)))
  98         ERR("Failed to get name, hr %#x.\n", hr);
  99
 100     IPropertyBag_Release(prop_bag);
 101     return hr;
 102 }
 103
 104 static HRESULT get_pin_media_type(IPin *pin, AM_MEDIA_TYPE *out)
 105 {
 106     IEnumMediaTypes *enummt;
 107     AM_MEDIA_TYPE *pmt;
 108     HRESULT hr;
 109
 110     if (FAILED(hr = IPin_EnumMediaTypes(pin, &enummt)))
 111         return hr;
 112     hr = IEnumMediaTypes_Next(enummt, 1, &pmt, NULL);
 113     IEnumMediaTypes_Release(enummt);
 114     if (hr != S_OK)
 115         return E_NOINTERFACE;
 116
 117     *out = *pmt;
 118     CoTaskMemFree(pmt);
 119     return S_OK;
 120 }
 121
 122 static HRESULT find_splitter(MediaDetImpl *detector)
 123 {
 124     IPin *source_pin, *splitter_pin;
 125     IEnumMoniker *enum_moniker;
 126     IFilterMapper2 *mapper;
 127     IBaseFilter *splitter;
 128     IEnumPins *enum_pins;
 129     AM_MEDIA_TYPE mt;
 130     IMoniker *mon;
 131     GUID type[2];
 132     VARIANT var;
 133     HRESULT hr;
 134     GUID clsid;
 135
 136     if (FAILED(hr = IBaseFilter_EnumPins(detector->source, &enum_pins)))
 137     {
 138         ERR("Failed to enumerate source pins, hr %#x.\n", hr);
 139         return hr;
 140     }
 141     hr = IEnumPins_Next(enum_pins, 1, &source_pin, NULL);
 142     IEnumPins_Release(enum_pins);
 143     if (hr != S_OK)
 144     {
 145         ERR("Failed to get source pin, hr %#x.\n", hr);
 146         return hr;
 147     }
 148
 149     if (FAILED(hr = get_pin_media_type(source_pin, &mt)))
 150     {
 151         ERR("Failed to get media type, hr %#x.\n", hr);
 152         IPin_Release(source_pin);
 153         return hr;
 154     }
 155
 156     type[0] = mt.majortype;
 157     type[1] = mt.subtype;
 158     FreeMediaType(&mt);
 159
 160     if (FAILED(hr = CoCreateInstance(&CLSID_FilterMapper2, NULL,
 161             CLSCTX_INPROC_SERVER, &IID_IFilterMapper2, (void **)&mapper)))
 162     {
 163         IPin_Release(source_pin);
 164         return hr;
 165     }
 166
 167     hr = IFilterMapper2_EnumMatchingFilters(mapper, &enum_moniker, 0, TRUE,
 168             MERIT_UNLIKELY, FALSE, 1, type, NULL, NULL, FALSE, TRUE, 0, NULL, NULL, NULL);
 169     IFilterMapper2_Release(mapper);
 170     if (FAILED(hr))
 171     {
 172         IPin_Release(source_pin);
 173         return hr;
 174     }
 175
 176     hr = E_NOINTERFACE;
 177     while (IEnumMoniker_Next(enum_moniker, 1, &mon, NULL) == S_OK)
 178     {
 179         hr = get_filter_info(mon, &clsid, &var);
 180         IMoniker_Release(mon);
 181         if (FAILED(hr))
 182             continue;
 183
 184         hr = CoCreateInstance(&clsid, NULL, CLSCTX_INPROC_SERVER,
 185                 &IID_IBaseFilter, (void **)&splitter);
 186         if (FAILED(hr))
 187         {
 188             VariantClear(&var);
 189             continue;
 190         }
 191
 192         hr = IGraphBuilder_AddFilter(detector->graph, splitter, V_BSTR(&var));
 193         VariantClear(&var);
 194         if (FAILED(hr))
 195         {
 196             IBaseFilter_Release(splitter);
 197             continue;
 198         }
 199
 200         hr = IBaseFilter_EnumPins(splitter, &enum_pins);
 201         if (FAILED(hr))
 202             goto next;
 203
 204         hr = IEnumPins_Next(enum_pins, 1, &splitter_pin, NULL);
 205         IEnumPins_Release(enum_pins);
 206         if (hr != S_OK)
 207             goto next;
 208
 209         hr = IPin_Connect(source_pin, splitter_pin, NULL);
 210         IPin_Release(splitter_pin);
 211         if (SUCCEEDED(hr))
 212         {
 213             detector->splitter = splitter;
 214             break;
 215         }
 216
 217 next:
 218         IGraphBuilder_RemoveFilter(detector->graph, splitter);
 219         IBaseFilter_Release(splitter);
 220     }
 221
 222     IEnumMoniker_Release(enum_moniker);
 223     IPin_Release(source_pin);
 224     return hr;
 225 }
 226
 227 /* MediaDet inner IUnknown */
 228 static HRESULT WINAPI MediaDet_inner_QueryInterface(IUnknown *iface, REFIID riid, void **ppv)
 229 {
 230     MediaDetImpl *This = impl_from_IUnknown(iface);
 231
 232     TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
 233
 234     *ppv = NULL;
 235     if (IsEqualIID(riid, &IID_IUnknown))
 236         *ppv = &This->IUnknown_inner;
 237     else if (IsEqualIID(riid, &IID_IMediaDet))
 238         *ppv = &This->IMediaDet_iface;
 239     else
 240         WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppv);
 241
 242     if (!*ppv)
 243         return E_NOINTERFACE;
 244
 245     IUnknown_AddRef((IUnknown*)*ppv);
 246     return S_OK;
 247 }
 248
 249 static ULONG WINAPI MediaDet_inner_AddRef(IUnknown *iface)
 250 {
 251     MediaDetImpl *This = impl_from_IUnknown(iface);
 252     ULONG ref = InterlockedIncrement(&This->ref);
 253
 254     TRACE("(%p) new ref = %u\n", This, ref);
 255
 256     return ref;
 257 }
 258
 259 static ULONG WINAPI MediaDet_inner_Release(IUnknown *iface)
 260 {
 261     MediaDetImpl *This = impl_from_IUnknown(iface);
 262     ULONG ref = InterlockedDecrement(&This->ref);
 263
 264     TRACE("(%p) new ref = %u\n", This, ref);
 265
 266     if (ref == 0)
 267     {
 268         MD_cleanup(This);
 269         CoTaskMemFree(This);
 270     }
 271
 272     return ref;
 273 }
 274
 275 static const IUnknownVtbl mediadet_vtbl =
 276 {
 277     MediaDet_inner_QueryInterface,
 278     MediaDet_inner_AddRef,
 279     MediaDet_inner_Release,
 280 };
 281
 282 /* IMediaDet implementation */
 283 static HRESULT WINAPI MediaDet_QueryInterface(IMediaDet *iface, REFIID riid, void **ppv)
 284 {
 285     MediaDetImpl *This = impl_from_IMediaDet(iface);
 286     return IUnknown_QueryInterface(This->outer_unk, riid, ppv);
 287 }
 288
 289 static ULONG WINAPI MediaDet_AddRef(IMediaDet *iface)
 290 {
 291     MediaDetImpl *This = impl_from_IMediaDet(iface);
 292     return IUnknown_AddRef(This->outer_unk);
 293 }
 294
 295 static ULONG WINAPI MediaDet_Release(IMediaDet *iface)
 296 {
 297     MediaDetImpl *This = impl_from_IMediaDet(iface);
 298     return IUnknown_Release(This->outer_unk);
 299 }
 300
 301 static HRESULT WINAPI MediaDet_get_Filter(IMediaDet *iface, IUnknown **filter)
 302 {
 303     MediaDetImpl *detector = impl_from_IMediaDet(iface);
 304
 305     TRACE("detector %p, filter %p.\n", detector, filter);
 306
 307     if (!filter)
 308         return E_POINTER;
 309
 310     *filter = (IUnknown *)detector->source;
 311     if (*filter)
 312         IUnknown_AddRef(*filter);
 313     else
 314         return S_FALSE;
 315
 316     return S_OK;
 317 }
 318
 319 static HRESULT WINAPI MediaDet_put_Filter(IMediaDet *iface, IUnknown *unk)
 320 {
 321     MediaDetImpl *detector = impl_from_IMediaDet(iface);
 322     IGraphBuilder *graph;
 323     IBaseFilter *filter;
 324     HRESULT hr;
 325
 326     TRACE("detector %p, unk %p.\n", detector, unk);
 327
 328     if (!unk)
 329         return E_POINTER;
 330
 331     if (FAILED(hr = IUnknown_QueryInterface(unk, &IID_IBaseFilter, (void **)&filter)))
 332     {
 333         WARN("Object does not expose IBaseFilter.\n");
 334         return hr;
 335     }
 336
 337     if (detector->graph)
 338         MD_cleanup(detector);
 339
 340     if (FAILED(hr = CoCreateInstance(&CLSID_FilterGraph, NULL,
 341             CLSCTX_INPROC_SERVER, &IID_IGraphBuilder, (void **)&graph)))
 342     {
 343         IBaseFilter_Release(filter);
 344         return hr;
 345     }
 346
 347     if (FAILED(hr = IGraphBuilder_AddFilter(graph, filter, L"Source")))
 348     {
 349         IGraphBuilder_Release(graph);
 350         IBaseFilter_Release(filter);
 351         return hr;
 352     }
 353
 354     detector->graph = graph;
 355     detector->source = filter;
 356     if (FAILED(find_splitter(detector)))
 357     {
 358         detector->splitter = detector->source;
 359         IBaseFilter_AddRef(detector->splitter);
 360     }
 361
 362     return IMediaDet_put_CurrentStream(&detector->IMediaDet_iface, 0);
 363 }
 364
 365 static HRESULT WINAPI MediaDet_get_OutputStreams(IMediaDet* iface, LONG *pVal)
 366 {
 367     MediaDetImpl *This = impl_from_IMediaDet(iface);
 368     IEnumPins *pins;
 369     IPin *pin;
 370     HRESULT hr;
 371
 372     TRACE("(%p)\n", This);
 373
 374     if (!This->splitter)
 375         return E_INVALIDARG;
 376
 377     if (This->num_streams != -1)
 378     {
 379         *pVal = This->num_streams;
 380         return S_OK;
 381     }
 382
 383     *pVal = 0;
 384
 385     hr = IBaseFilter_EnumPins(This->splitter, &pins);
 386     if (FAILED(hr))
 387         return hr;
 388
 389     while (IEnumPins_Next(pins, 1, &pin, NULL) == S_OK)
 390     {
 391         PIN_DIRECTION dir;
 392         hr = IPin_QueryDirection(pin, &dir);
 393         IPin_Release(pin);
 394         if (FAILED(hr))
 395         {
 396             IEnumPins_Release(pins);
 397             return hr;
 398         }
 399
 400         if (dir == PINDIR_OUTPUT)
 401             ++*pVal;
 402     }
 403     IEnumPins_Release(pins);
 404
 405     This->num_streams = *pVal;
 406     return S_OK;
 407 }
 408
 409 static HRESULT WINAPI MediaDet_get_CurrentStream(IMediaDet* iface, LONG *pVal)
 410 {
 411     MediaDetImpl *This = impl_from_IMediaDet(iface);
 412     TRACE("(%p)\n", This);
 413
 414     if (!pVal)
 415         return E_POINTER;
 416
 417     *pVal = This->cur_stream;
 418     return S_OK;
 419 }
 420
 421 static HRESULT SetCurPin(MediaDetImpl *This, LONG strm)
 422 {
 423     IEnumPins *pins;
 424     IPin *pin;
 425     HRESULT hr;
 426
 427     assert(This->splitter);
 428     assert(0 <= strm && strm < This->num_streams);
 429
 430     if (This->cur_pin)
 431     {
 432         IPin_Release(This->cur_pin);
 433         This->cur_pin = NULL;
 434     }
 435
 436     hr = IBaseFilter_EnumPins(This->splitter, &pins);
 437     if (FAILED(hr))
 438         return hr;
 439
 440     while (IEnumPins_Next(pins, 1, &pin, NULL) == S_OK && !This->cur_pin)
 441     {
 442         PIN_DIRECTION dir;
 443         hr = IPin_QueryDirection(pin, &dir);
 444         if (FAILED(hr))
 445         {
 446             IPin_Release(pin);
 447             IEnumPins_Release(pins);
 448             return hr;
 449         }
 450
 451         if (dir == PINDIR_OUTPUT && strm-- == 0)
 452             This->cur_pin = pin;
 453         else
 454             IPin_Release(pin);
 455     }
 456     IEnumPins_Release(pins);
 457
 458     assert(This->cur_pin);
 459     return S_OK;
 460 }
 461
 462 static HRESULT WINAPI MediaDet_put_CurrentStream(IMediaDet* iface, LONG newVal)
 463 {
 464     MediaDetImpl *This = impl_from_IMediaDet(iface);
 465     HRESULT hr;
 466
 467     TRACE("(%p)->(%d)\n", This, newVal);
 468
 469     if (This->num_streams == -1)
 470     {
 471         LONG n;
 472         hr = MediaDet_get_OutputStreams(iface, &n);
 473         if (FAILED(hr))
 474             return hr;
 475     }
 476
 477     if (newVal < 0 || This->num_streams <= newVal)
 478         return E_INVALIDARG;
 479
 480     hr = SetCurPin(This, newVal);
 481     if (FAILED(hr))
 482         return hr;
 483
 484     This->cur_stream = newVal;
 485     return S_OK;
 486 }
 487
 488 static HRESULT WINAPI MediaDet_get_StreamType(IMediaDet *iface, GUID *majortype)
 489 {
 490     MediaDetImpl *detector = impl_from_IMediaDet(iface);
 491     AM_MEDIA_TYPE mt;
 492     HRESULT hr;
 493
 494     TRACE("detector %p, majortype %p.\n", detector, majortype);
 495
 496     if (!majortype)
 497         return E_POINTER;
 498
 499     if (SUCCEEDED(hr = IMediaDet_get_StreamMediaType(iface, &mt)))
 500     {
 501         *majortype = mt.majortype;
 502         FreeMediaType(&mt);
 503     }
 504
 505     return hr;
 506 }
 507
 508 static HRESULT WINAPI MediaDet_get_StreamTypeB(IMediaDet *iface, BSTR *bstr)
 509 {
 510     MediaDetImpl *detector = impl_from_IMediaDet(iface);
 511     HRESULT hr;
 512     GUID guid;
 513
 514     TRACE("detector %p, bstr %p.\n", detector, bstr);
 515
 516     if (SUCCEEDED(hr = IMediaDet_get_StreamType(iface, &guid)))
 517     {
 518         if (!(*bstr = SysAllocStringLen(NULL, CHARS_IN_GUID - 1)))
 519             return E_OUTOFMEMORY;
 520         StringFromGUID2(&guid, *bstr, CHARS_IN_GUID);
 521     }
 522     return hr;
 523 }
 524
 525 static HRESULT WINAPI MediaDet_get_StreamLength(IMediaDet *iface, double *length)
 526 {
 527     MediaDetImpl *detector = impl_from_IMediaDet(iface);
 528     IMediaSeeking *seeking;
 529     HRESULT hr;
 530
 531     TRACE("detector %p, length %p.\n", detector, length);
 532
 533     if (!length)
 534         return E_POINTER;
 535
 536     if (!detector->cur_pin)
 537         return E_INVALIDARG;
 538
 539     if (SUCCEEDED(hr = IPin_QueryInterface(detector->cur_pin,
 540                 &IID_IMediaSeeking, (void **)&seeking)))
 541     {
 542         LONGLONG duration;
 543
 544         if (SUCCEEDED(hr = IMediaSeeking_GetDuration(seeking, &duration)))
 545         {
 546             /* Windows assumes the time format is TIME_FORMAT_MEDIA_TIME
 547                and does not check it nor convert it, as tests show. */
 548             *length = (REFTIME)duration / 10000000;
 549         }
 550         IMediaSeeking_Release(seeking);
 551     }
 552
 553     return hr;
 554 }
 555
 556 static HRESULT WINAPI MediaDet_get_Filename(IMediaDet* iface, BSTR *pVal)
 557 {
 558     MediaDetImpl *This = impl_from_IMediaDet(iface);
 559
 560     TRACE("(%p)\n", This);
 561
 562     if (!pVal)
 563         return E_POINTER;
 564
 565     *pVal = NULL;
 566     /* MSDN says it should return E_FAIL if no file is open, but tests
 567        show otherwise.  */
 568     if (!This->filename)
 569         return S_OK;
 570
 571     *pVal = SysAllocString(This->filename);
 572     if (!*pVal)
 573         return E_OUTOFMEMORY;
 574
 575     return S_OK;
 576 }
 577
 578 static HRESULT WINAPI MediaDet_put_Filename(IMediaDet *iface, BSTR filename)
 579 {
 580     MediaDetImpl *This = impl_from_IMediaDet(iface);
 581     IGraphBuilder *gb;
 582     IBaseFilter *bf;
 583     HRESULT hr;
 584
 585     TRACE("detector %p, filename %s.\n", This, debugstr_w(filename));
 586
 587     if (This->graph)
 588     {
 589         WARN("MSDN says not to call this method twice\n");
 590         MD_cleanup(This);
 591     }
 592
 593     hr = CoCreateInstance(&CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER,
 594                           &IID_IGraphBuilder, (void **) &gb);
 595     if (FAILED(hr))
 596         return hr;
 597
 598     if (FAILED(hr = IGraphBuilder_AddSourceFilter(gb, filename, L"Source", &bf)))
 599     {
 600         IGraphBuilder_Release(gb);
 601         return hr;
 602     }
 603
 604     if (!(This->filename = wcsdup(filename)))
 605     {
 606         IBaseFilter_Release(bf);
 607         IGraphBuilder_Release(gb);
 608         return E_OUTOFMEMORY;
 609     }
 610
 611     This->graph = gb;
 612     This->source = bf;
 613     hr = find_splitter(This);
 614     if (FAILED(hr))
 615         return hr;
 616
 617     return MediaDet_put_CurrentStream(iface, 0);
 618 }
 619
 620 static HRESULT WINAPI MediaDet_GetBitmapBits(IMediaDet* iface,
 621                                              double StreamTime,
 622                                              LONG *pBufferSize, char *pBuffer,
 623                                              LONG Width, LONG Height)
 624 {
 625     MediaDetImpl *This = impl_from_IMediaDet(iface);
 626     FIXME("(%p)->(%f %p %p %d %d): not implemented!\n", This, StreamTime, pBufferSize, pBuffer,
 627           Width, Height);
 628     return E_NOTIMPL;
 629 }
 630
 631 static HRESULT WINAPI MediaDet_WriteBitmapBits(IMediaDet* iface,
 632                                                double StreamTime, LONG Width,
 633                                                LONG Height, BSTR Filename)
 634 {
 635     MediaDetImpl *This = impl_from_IMediaDet(iface);
 636     FIXME("(%p)->(%f %d %d %p): not implemented!\n", This, StreamTime, Width, Height, Filename);
 637     return E_NOTIMPL;
 638 }
 639
 640 static HRESULT WINAPI MediaDet_get_StreamMediaType(IMediaDet* iface,
 641                                                    AM_MEDIA_TYPE *pVal)
 642 {
 643     MediaDetImpl *This = impl_from_IMediaDet(iface);
 644
 645     TRACE("(%p)\n", This);
 646
 647     if (!pVal)
 648         return E_POINTER;
 649
 650     if (!This->cur_pin)
 651         return E_INVALIDARG;
 652
 653     return get_pin_media_type(This->cur_pin, pVal);
 654 }
 655
 656 static HRESULT WINAPI MediaDet_GetSampleGrabber(IMediaDet* iface,
 657                                                 ISampleGrabber **ppVal)
 658 {
 659     MediaDetImpl *This = impl_from_IMediaDet(iface);
 660     FIXME("(%p)->(%p): not implemented!\n", This, ppVal);
 661     return E_NOTIMPL;
 662 }
 663
 664 static HRESULT WINAPI MediaDet_get_FrameRate(IMediaDet* iface, double *pVal)
 665 {
 666     MediaDetImpl *This = impl_from_IMediaDet(iface);
 667     AM_MEDIA_TYPE mt;
 668     VIDEOINFOHEADER *vh;
 669     HRESULT hr;
 670
 671     TRACE("(%p)\n", This);
 672
 673     if (!pVal)
 674         return E_POINTER;
 675
 676     hr = MediaDet_get_StreamMediaType(iface, &mt);
 677     if (FAILED(hr))
 678         return hr;
 679
 680     if (!IsEqualGUID(&mt.majortype, &MEDIATYPE_Video))
 681     {
 682         CoTaskMemFree(mt.pbFormat);
 683         return VFW_E_INVALIDMEDIATYPE;
 684     }
 685
 686     vh = (VIDEOINFOHEADER *) mt.pbFormat;
 687     *pVal = 1.0e7 / (double) vh->AvgTimePerFrame;
 688
 689     CoTaskMemFree(mt.pbFormat);
 690     return S_OK;
 691 }
 692
 693 static HRESULT WINAPI MediaDet_EnterBitmapGrabMode(IMediaDet* iface,
 694                                                    double SeekTime)
 695 {
 696     MediaDetImpl *This = impl_from_IMediaDet(iface);
 697     FIXME("(%p)->(%f): not implemented!\n", This, SeekTime);
 698     return E_NOTIMPL;
 699 }
 700
 701 static const IMediaDetVtbl IMediaDet_VTable =
 702 {
 703     MediaDet_QueryInterface,
 704     MediaDet_AddRef,
 705     MediaDet_Release,
 706     MediaDet_get_Filter,
 707     MediaDet_put_Filter,
 708     MediaDet_get_OutputStreams,
 709     MediaDet_get_CurrentStream,
 710     MediaDet_put_CurrentStream,
 711     MediaDet_get_StreamType,
 712     MediaDet_get_StreamTypeB,
 713     MediaDet_get_StreamLength,
 714     MediaDet_get_Filename,
 715     MediaDet_put_Filename,
 716     MediaDet_GetBitmapBits,
 717     MediaDet_WriteBitmapBits,
 718     MediaDet_get_StreamMediaType,
 719     MediaDet_GetSampleGrabber,
 720     MediaDet_get_FrameRate,
 721     MediaDet_EnterBitmapGrabMode,
 722 };
 723
 724 HRESULT media_detector_create(IUnknown *pUnkOuter, IUnknown **ppv)
 725 {
 726     MediaDetImpl* obj = NULL;
 727
 728     TRACE("(%p,%p)\n", pUnkOuter, ppv);
 729
 730     obj = CoTaskMemAlloc(sizeof(MediaDetImpl));
 731     if (NULL == obj) {
 732         *ppv = NULL;
 733         return E_OUTOFMEMORY;
 734     }
 735     ZeroMemory(obj, sizeof(MediaDetImpl));
 736
 737     obj->ref = 1;
 738     obj->IUnknown_inner.lpVtbl = &mediadet_vtbl;
 739     obj->IMediaDet_iface.lpVtbl = &IMediaDet_VTable;
 740     obj->graph = NULL;
 741     obj->source = NULL;
 742     obj->splitter = NULL;
 743     obj->cur_pin = NULL;
 744     obj->num_streams = -1;
 745     obj->cur_stream = 0;
 746
 747     if (pUnkOuter)
 748         obj->outer_unk = pUnkOuter;
 749     else
 750         obj->outer_unk = &obj->IUnknown_inner;
 751
 752     *ppv = &obj->IUnknown_inner;
 753     return S_OK;
 754 }