dlls/qcap/pin.h

   1 /*
   2  * IPin function declarations to allow inheritance
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /* This function will process incoming samples to the pin.
  22  * Any return value valid in IMemInputPin::Receive is allowed here
  23  */
  24 typedef HRESULT (* SAMPLEPROC)(LPVOID userdata, IMediaSample * pSample);
  25
  26 /* This function will determine whether a type is supported or not.
  27  * It is allowed to return any error value (within reason), as opposed
  28  * to IPin::QueryAccept which is only allowed to return S_OK or S_FALSE.
  29  */
  30 typedef HRESULT (* QUERYACCEPTPROC)(LPVOID userdata, const AM_MEDIA_TYPE * pmt);
  31
  32 /* This function is called prior to finalizing a connection with
  33  * another pin and can be used to get things from the other pin
  34  * like IMemInput interfaces.
  35  */
  36 typedef HRESULT (* PRECONNECTPROC)(IPin * iface, IPin * pConnectPin);
  37
  38 typedef struct IPinImpl
  39 {
  40         const struct IPinVtbl * lpVtbl;
  41         LONG refCount;
  42         LPCRITICAL_SECTION pCritSec;
  43         PIN_INFO pinInfo;
  44         IPin * pConnectedTo;
  45         AM_MEDIA_TYPE mtCurrent;
  46         ENUMMEDIADETAILS enumMediaDetails;
  47         QUERYACCEPTPROC fnQueryAccept;
  48         LPVOID pUserData;
  49 } IPinImpl;
  50
  51 typedef struct OutputPin
  52 {
  53         /* inheritance C style! */
  54         IPinImpl pin;
  55
  56         IMemInputPin * pMemInputPin;
  57         HRESULT (* pConnectSpecific)(IPin * iface, IPin * pReceiver, const AM_MEDIA_TYPE * pmt);
  58         ALLOCATOR_PROPERTIES allocProps;
  59 } OutputPin;
  60
  61 /*** Initializers ***/
  62 HRESULT OutputPin_Init(const PIN_INFO * pPinInfo, ALLOCATOR_PROPERTIES *props, LPVOID pUserData, QUERYACCEPTPROC pQueryAccept, LPCRITICAL_SECTION pCritSec, OutputPin * pPinImpl);
  63
  64 /* Common */
  65 HRESULT WINAPI IPinImpl_ConnectedTo(IPin * iface, IPin ** ppPin);
  66 HRESULT WINAPI IPinImpl_ConnectionMediaType(IPin * iface, AM_MEDIA_TYPE * pmt);
  67 HRESULT WINAPI IPinImpl_QueryPinInfo(IPin * iface, PIN_INFO * pInfo);
  68 HRESULT WINAPI IPinImpl_QueryDirection(IPin * iface, PIN_DIRECTION * pPinDir);
  69 HRESULT WINAPI IPinImpl_QueryId(IPin * iface, LPWSTR * Id);
  70 HRESULT WINAPI IPinImpl_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt);
  71 HRESULT WINAPI IPinImpl_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum);
  72 HRESULT WINAPI IPinImpl_QueryInternalConnections(IPin * iface, IPin ** apPin, ULONG * cPin);
  73
  74 /* Output Pin */
  75 HRESULT WINAPI OutputPin_Connect(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt);
  76 HRESULT WINAPI OutputPin_Disconnect(IPin * iface);
  77 HRESULT WINAPI OutputPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt);
  78
  79 HRESULT OutputPin_GetDeliveryBuffer(OutputPin * This, IMediaSample ** ppSample, const REFERENCE_TIME * tStart, const REFERENCE_TIME * tStop, DWORD dwFlags);
  80 HRESULT OutputPin_SendSample(OutputPin * This, IMediaSample * pSample);