dlls/qcap/pin.c

   1 /*
   2  * Generic Implementation of IPin Interface
   3  *
   4  * Copyright 2003 Robert Shearman
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #define COBJMACROS
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "wtypes.h"
  28 #include "wingdi.h"
  29 #include "winuser.h"
  30 #include "dshow.h"
  31
  32 #include "qcap_main.h"
  33 #include "pin.h"
  34
  35 #include "wine/debug.h"
  36 #include "wine/unicode.h"
  37 #include "uuids.h"
  38 #include "vfwmsgs.h"
  39 #include <assert.h>
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(qcap);
  42
  43 #define ALIGNDOWN(value,boundary) ((value) & ~(boundary-1))
  44 #define ALIGNUP(value,boundary) (ALIGNDOWN(value - 1, boundary) + boundary)
  45
  46 static void Copy_PinInfo(PIN_INFO * pDest, const PIN_INFO * pSrc)
  47 {
  48     /* Tempting to just do a memcpy, but the name field is
  49        128 characters long! We will probably never exceed 10
  50        most of the time, so we are better off copying
  51        each field manually */
  52     strcpyW(pDest->achName, pSrc->achName);
  53     pDest->dir = pSrc->dir;
  54     pDest->pFilter = pSrc->pFilter;
  55 }
  56
  57 HRESULT WINAPI IPinImpl_ConnectedTo(IPin * iface, IPin ** ppPin)
  58 {
  59     HRESULT hr;
  60     IPinImpl *This = (IPinImpl *)iface;
  61
  62 /*  TRACE("(%p)\n", ppPin);*/
  63
  64     EnterCriticalSection(This->pCritSec);
  65     {
  66         if (This->pConnectedTo)
  67         {
  68             *ppPin = This->pConnectedTo;
  69             IPin_AddRef(*ppPin);
  70             hr = S_OK;
  71         }
  72         else
  73             hr = VFW_E_NOT_CONNECTED;
  74     }
  75     LeaveCriticalSection(This->pCritSec);
  76
  77     return hr;
  78 }
  79
  80 HRESULT WINAPI IPinImpl_ConnectionMediaType(IPin * iface, AM_MEDIA_TYPE * pmt)
  81 {
  82     HRESULT hr;
  83     IPinImpl *This = (IPinImpl *)iface;
  84
  85     TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
  86
  87     EnterCriticalSection(This->pCritSec);
  88     {
  89         if (This->pConnectedTo)
  90         {
  91             CopyMediaType(pmt, &This->mtCurrent);
  92             hr = S_OK;
  93         }
  94         else
  95         {
  96             ZeroMemory(pmt, sizeof(*pmt));
  97             hr = VFW_E_NOT_CONNECTED;
  98         }
  99     }
 100     LeaveCriticalSection(This->pCritSec);
 101
 102     return hr;
 103 }
 104
 105 HRESULT WINAPI IPinImpl_QueryPinInfo(IPin * iface, PIN_INFO * pInfo)
 106 {
 107     IPinImpl *This = (IPinImpl *)iface;
 108
 109     TRACE("(%p/%p)->(%p)\n", This, iface, pInfo);
 110
 111     Copy_PinInfo(pInfo, &This->pinInfo);
 112     IBaseFilter_AddRef(pInfo->pFilter);
 113
 114     return S_OK;
 115 }
 116
 117 HRESULT WINAPI IPinImpl_QueryDirection(IPin * iface, PIN_DIRECTION * pPinDir)
 118 {
 119     IPinImpl *This = (IPinImpl *)iface;
 120
 121     TRACE("(%p/%p)->(%p)\n", This, iface, pPinDir);
 122
 123     *pPinDir = This->pinInfo.dir;
 124
 125     return S_OK;
 126 }
 127
 128 HRESULT WINAPI IPinImpl_QueryId(IPin * iface, LPWSTR * Id)
 129 {
 130     IPinImpl *This = (IPinImpl *)iface;
 131
 132     TRACE("(%p/%p)->(%p)\n", This, iface, Id);
 133
 134     *Id = CoTaskMemAlloc((strlenW(This->pinInfo.achName) + 1) * sizeof(WCHAR));
 135     if (!*Id)
 136         return E_OUTOFMEMORY;
 137
 138     strcpyW(*Id, This->pinInfo.achName);
 139
 140     return S_OK;
 141 }
 142
 143 HRESULT WINAPI IPinImpl_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt)
 144 {
 145     IPinImpl *This = (IPinImpl *)iface;
 146
 147     TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
 148
 149     if (!This->fnQueryAccept) return S_OK;
 150
 151     return (This->fnQueryAccept(This->pUserData, pmt) == S_OK ? S_OK : S_FALSE);
 152 }
 153
 154 HRESULT WINAPI IPinImpl_QueryInternalConnections(IPin * iface, IPin ** apPin, ULONG * cPin)
 155 {
 156     IPinImpl *This = (IPinImpl *)iface;
 157
 158     TRACE("(%p/%p)->(%p, %p)\n", This, iface, apPin, cPin);
 159
 160     return E_NOTIMPL; /* to tell caller that all input pins connected to all output pins */
 161 }
 162
 163 /* Function called as a helper to IPin_Connect */
 164 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 165 /* NOTE: not part of standard interface */
 166 static HRESULT OutputPin_ConnectSpecific(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 167 {
 168     OutputPin *This = (OutputPin *)iface;
 169     HRESULT hr;
 170     IMemAllocator * pMemAlloc = NULL;
 171     ALLOCATOR_PROPERTIES actual; /* FIXME: should we put the actual props back in to This? */
 172
 173     TRACE("(%p, %p)\n", pReceivePin, pmt);
 174     dump_AM_MEDIA_TYPE(pmt);
 175
 176     /* FIXME: call queryacceptproc */
 177
 178     This->pin.pConnectedTo = pReceivePin;
 179     IPin_AddRef(pReceivePin);
 180     CopyMediaType(&This->pin.mtCurrent, pmt);
 181
 182     hr = IPin_ReceiveConnection(pReceivePin, iface, pmt);
 183
 184     /* get the IMemInputPin interface we will use to deliver samples to the
 185      * connected pin */
 186     if (SUCCEEDED(hr))
 187     {
 188         hr = IPin_QueryInterface(pReceivePin, &IID_IMemInputPin, (LPVOID)&This->pMemInputPin);
 189
 190         if (SUCCEEDED(hr))
 191             hr = IMemInputPin_GetAllocator(This->pMemInputPin, &pMemAlloc);
 192
 193         if (hr == VFW_E_NO_ALLOCATOR)
 194         {
 195             /* Input pin provides no allocator, use standard memory allocator */
 196             hr = CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC_SERVER, &IID_IMemAllocator, (LPVOID*)&pMemAlloc);
 197
 198             if (SUCCEEDED(hr))
 199             {
 200                 hr = IMemInputPin_NotifyAllocator(This->pMemInputPin, pMemAlloc, FALSE);
 201             }
 202         }
 203
 204         if (SUCCEEDED(hr))
 205             hr = IMemAllocator_SetProperties(pMemAlloc, &This->allocProps, &actual);
 206
 207         if (pMemAlloc)
 208             IMemAllocator_Release(pMemAlloc);
 209
 210         /* break connection if we couldn't get the allocator */
 211         if (FAILED(hr))
 212             IPin_Disconnect(pReceivePin);
 213     }
 214
 215     if (FAILED(hr))
 216     {
 217         IPin_Release(This->pin.pConnectedTo);
 218         This->pin.pConnectedTo = NULL;
 219         DeleteMediaType(&This->pin.mtCurrent);
 220     }
 221
 222     TRACE(" -- %x\n", hr);
 223     return hr;
 224 }
 225
 226 HRESULT OutputPin_Init(const PIN_INFO * pPinInfo, const ALLOCATOR_PROPERTIES * props,
 227                        LPVOID pUserData, QUERYACCEPTPROC pQueryAccept,
 228                        LPCRITICAL_SECTION pCritSec, OutputPin * pPinImpl)
 229 {
 230     TRACE("\n");
 231
 232     /* Common attributes */
 233     pPinImpl->pin.refCount = 1;
 234     pPinImpl->pin.pConnectedTo = NULL;
 235     pPinImpl->pin.fnQueryAccept = pQueryAccept;
 236     pPinImpl->pin.pUserData = pUserData;
 237     pPinImpl->pin.pCritSec = pCritSec;
 238     Copy_PinInfo(&pPinImpl->pin.pinInfo, pPinInfo);
 239
 240     /* Output pin attributes */
 241     pPinImpl->pMemInputPin = NULL;
 242     pPinImpl->pConnectSpecific = OutputPin_ConnectSpecific;
 243     if (props)
 244     {
 245         pPinImpl->allocProps = *props;
 246         if (pPinImpl->allocProps.cbAlign == 0)
 247             pPinImpl->allocProps.cbAlign = 1;
 248     }
 249     else
 250         ZeroMemory(&pPinImpl->allocProps, sizeof(pPinImpl->allocProps));
 251
 252     return S_OK;
 253 }
 254
 255 HRESULT WINAPI OutputPin_Connect(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 256 {
 257     HRESULT hr;
 258     OutputPin *This = (OutputPin *)iface;
 259
 260     TRACE("(%p/%p)->(%p, %p)\n", This, iface, pReceivePin, pmt);
 261     dump_AM_MEDIA_TYPE(pmt);
 262
 263     /* If we try to connect to ourself, we will definitely deadlock.
 264      * There are other cases where we could deadlock too, but this
 265      * catches the obvious case */
 266     assert(pReceivePin != iface);
 267
 268     EnterCriticalSection(This->pin.pCritSec);
 269     {
 270         /* if we have been a specific type to connect with, then we can either connect
 271          * with that or fail. We cannot choose different AM_MEDIA_TYPE */
 272         if (pmt && !IsEqualGUID(&pmt->majortype, &GUID_NULL) && !IsEqualGUID(&pmt->subtype, &GUID_NULL))
 273             hr = This->pConnectSpecific(iface, pReceivePin, pmt);
 274         else
 275         {
 276             /* negotiate media type */
 277
 278             IEnumMediaTypes * pEnumCandidates;
 279             AM_MEDIA_TYPE * pmtCandidate; /* Candidate media type */
 280
 281             if (SUCCEEDED(hr = IPin_EnumMediaTypes(iface, &pEnumCandidates)))
 282             {
 283                 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
 284
 285                 /* try this filter's media types first */
 286                 while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, NULL))
 287                 {
 288                     if (( !pmt || CompareMediaTypes(pmt, pmtCandidate, TRUE) ) &&
 289                         (This->pConnectSpecific(iface, pReceivePin, pmtCandidate) == S_OK))
 290                     {
 291                         hr = S_OK;
 292                         TRACE("o_o\n");
 293                         DeleteMediaType(pmtCandidate);
 294                         break;
 295                     }
 296                     DeleteMediaType(pmtCandidate);
 297                 }
 298                 IEnumMediaTypes_Release(pEnumCandidates);
 299             }
 300
 301             /* then try receiver filter's media types */
 302             if (hr != S_OK && SUCCEEDED(hr = IPin_EnumMediaTypes(pReceivePin, &pEnumCandidates))) /* if we haven't already connected successfully */
 303             {
 304                 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
 305
 306                 while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, NULL))
 307                 {
 308                     if (( !pmt || CompareMediaTypes(pmt, pmtCandidate, TRUE) ) &&
 309                         (This->pConnectSpecific(iface, pReceivePin, pmtCandidate) == S_OK))
 310                     {
 311                         hr = S_OK;
 312                         DeleteMediaType(pmtCandidate);
 313                         break;
 314                     }
 315                     DeleteMediaType(pmtCandidate);
 316                 } /* while */
 317                 IEnumMediaTypes_Release(pEnumCandidates);
 318             } /* if not found */
 319         } /* if negotiate media type */
 320     } /* if succeeded */
 321     LeaveCriticalSection(This->pin.pCritSec);
 322
 323     TRACE(" -- %x\n", hr);
 324     return hr;
 325 }
 326
 327 HRESULT WINAPI OutputPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 328 {
 329     ERR("Incoming connection on an output pin! (%p, %p)\n", pReceivePin, pmt);
 330
 331     return E_UNEXPECTED;
 332 }
 333
 334 HRESULT WINAPI OutputPin_Disconnect(IPin * iface)
 335 {
 336     HRESULT hr;
 337     OutputPin *This = (OutputPin *)iface;
 338
 339     TRACE("()\n");
 340
 341     EnterCriticalSection(This->pin.pCritSec);
 342     {
 343         if (This->pMemInputPin)
 344         {
 345             IMemInputPin_Release(This->pMemInputPin);
 346             This->pMemInputPin = NULL;
 347         }
 348         if (This->pin.pConnectedTo)
 349         {
 350             IPin_Release(This->pin.pConnectedTo);
 351             This->pin.pConnectedTo = NULL;
 352             hr = S_OK;
 353         }
 354         else
 355             hr = S_FALSE;
 356     }
 357     LeaveCriticalSection(This->pin.pCritSec);
 358
 359     return hr;
 360 }
 361
 362 HRESULT OutputPin_GetDeliveryBuffer(OutputPin * This, IMediaSample ** ppSample, REFERENCE_TIME * tStart, REFERENCE_TIME * tStop, DWORD dwFlags)
 363 {
 364     HRESULT hr;
 365
 366     TRACE("(%p, %p, %p, %x)\n", ppSample, tStart, tStop, dwFlags);
 367
 368     EnterCriticalSection(This->pin.pCritSec);
 369     {
 370         if (!This->pin.pConnectedTo)
 371             hr = VFW_E_NOT_CONNECTED;
 372         else
 373         {
 374             IMemAllocator * pAlloc = NULL;
 375
 376             hr = IMemInputPin_GetAllocator(This->pMemInputPin, &pAlloc);
 377
 378             if (SUCCEEDED(hr))
 379                 hr = IMemAllocator_GetBuffer(pAlloc, ppSample, tStart, tStop, dwFlags);
 380
 381             if (SUCCEEDED(hr))
 382                 hr = IMediaSample_SetTime(*ppSample, tStart, tStop);
 383
 384             if (pAlloc)
 385                 IMemAllocator_Release(pAlloc);
 386         }
 387     }
 388     LeaveCriticalSection(This->pin.pCritSec);
 389
 390     return hr;
 391 }
 392
 393 HRESULT OutputPin_SendSample(OutputPin * This, IMediaSample * pSample)
 394 {
 395     HRESULT hr = S_OK;
 396     IMemInputPin * pMemConnected = NULL;
 397
 398     EnterCriticalSection(This->pin.pCritSec);
 399     {
 400         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 401             hr = VFW_E_NOT_CONNECTED;
 402         else
 403         {
 404             /* we don't have the lock held when using This->pMemInputPin,
 405              * so we need to AddRef it to stop it being deleted while we are
 406              * using it. */
 407             pMemConnected = This->pMemInputPin;
 408             IMemInputPin_AddRef(pMemConnected);
 409         }
 410     }
 411     LeaveCriticalSection(This->pin.pCritSec);
 412
 413     if (SUCCEEDED(hr))
 414     {
 415         /* NOTE: if we are in a critical section when Receive is called
 416          * then it causes some problems (most notably with the native Video
 417          * Renderer) if we are re-entered for whatever reason */
 418         hr = IMemInputPin_Receive(pMemConnected, pSample);
 419         IMemInputPin_Release(pMemConnected);
 420     }
 421
 422     return hr;
 423 }