380 lines
9 KiB
C++
380 lines
9 KiB
C++
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/*
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Copyright (c) 1998-1999 Microsoft Corporation
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Module Name:
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blbmedia.cpp
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Abstract:
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Implementation of CSdpblbApp and DLL registration.
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Author:
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*/
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#include "stdafx.h"
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#include "blbgen.h"
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#include "sdpblb.h"
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#include "blbmedia.h"
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#include "blbreg.h"
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#include "addrgen.h"
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// audio string with a trailing blank for the audio media blob
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const TCHAR AUDIO_TSTR[] = _T("audio ");
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const USHORT AUDIO_TSTRLEN = (sizeof(AUDIO_TSTR)/sizeof(TCHAR) -1);
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// static variables
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const IID &MEDIA::ELEM_IF_ID = IID_ITMedia;
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// uses GetElement() to access the sdp media instance - calls ENUM_ELEMENT::GetElement()
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CSdpConferenceBlob *
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MEDIA::GetConfBlob(
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)
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{
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return m_ConfBlob;
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}
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HRESULT
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MEDIA::Init(
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IN CSdpConferenceBlob &ConfBlob
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)
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{
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// check if the registry entries were read without errors
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if ( !SDP_REG_READER::IsValid() )
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{
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return HRESULT_FROM_ERROR_CODE(SDP_REG_READER::GetErrorCode());
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}
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// allocate an audio port
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// using random values for lease period since its not being interpreted
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MSA_PORT_GROUP PortGroup;
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PortGroup.PortType = AUDIO_PORT;
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WORD FirstAudioPort;
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// allocate video port
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if ( !MSAAllocatePorts(&PortGroup, FALSE, 1, &FirstAudioPort) )
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{
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return HRESULT_FROM_ERROR_CODE(GetLastError());
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}
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// create a defalt sdp media instance
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SDP_MEDIA *SdpMedia;
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try
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{
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SdpMedia = new SDP_MEDIA();
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}
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catch(...)
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{
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SdpMedia = NULL;
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}
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BAIL_IF_NULL(SdpMedia, E_OUTOFMEMORY);
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// allocate memory for the audio media blob
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TCHAR *SdpMediaBlob;
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try
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{
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SdpMediaBlob = new TCHAR[
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SDP_REG_READER::GetMediaTemplateLen() +
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AUDIO_TSTRLEN +
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MAX_PORT_STRLEN
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];
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}
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catch(...)
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{
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SdpMediaBlob = NULL;
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}
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if ( NULL == SdpMediaBlob )
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{
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delete SdpMedia;
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return E_OUTOFMEMORY;
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}
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// copy AUDIO_TSTR into the sdp media blob
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lstrcpy(SdpMediaBlob, AUDIO_TSTR);
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TCHAR *BlobPtr = SdpMediaBlob;
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// use the media template to create a media blob
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// parse the media blob to initialize the sdp media instance
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// if not successful, delete the sdp media instance and return error
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if ( (0 == _stprintf(SdpMediaBlob+AUDIO_TSTRLEN, SDP_REG_READER::GetMediaTemplate(), FirstAudioPort)) ||
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(!SdpMedia->ParseLine(BlobPtr)) )
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{
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delete SdpMedia;
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delete SdpMediaBlob;
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return HRESULT_FROM_ERROR_CODE(GetLastError());
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}
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delete SdpMediaBlob;
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m_ConfBlob = &ConfBlob;
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ENUM_ELEMENT<SDP_MEDIA>::SuccessInit(*SdpMedia, TRUE);
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ITConnectionImpl::SuccessInit(*SdpMedia);
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ITAttributeListImpl::SuccessInit(SdpMedia->GetAttributeList());
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return S_OK;
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}
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STDMETHODIMP MEDIA::get_MediaName(BSTR * pVal)
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{
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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return GetElement().GetName().GetBstrCopy(pVal);
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}
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STDMETHODIMP MEDIA::put_MediaName(BSTR newVal)
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{
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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return GetElement().GetName().SetBstr(newVal);
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}
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STDMETHODIMP MEDIA::get_StartPort(LONG * pVal)
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{
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BAIL_IF_NULL(pVal, E_INVALIDARG);
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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// vb doesn't take a USHORT (16bit unsigned value)
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*pVal = (LONG)GetElement().GetStartPort().GetValue();
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return S_OK;
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}
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STDMETHODIMP MEDIA::get_NumPorts(LONG * pVal)
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{
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BAIL_IF_NULL(pVal, E_INVALIDARG);
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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// vb doesn't take a USHORT (16bit unsigned value)
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*pVal = (LONG)(GetElement().GetNumPorts().IsValid() ? GetElement().GetNumPorts().GetValue() : 1);
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return S_OK;
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}
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STDMETHODIMP MEDIA::SetPortInfo(LONG StartPort, LONG NumPorts)
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{
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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// validate the start port and num ports value - they should be USHORT values [0..2**16-1]
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if ( !((0 <= StartPort) && (USHORT(-1) > StartPort) && (0 <= NumPorts) && (USHORT(-1) > NumPorts)) )
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{
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return E_INVALIDARG;
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}
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return GetElement().SetPortInfo((USHORT)StartPort, (USHORT)NumPorts);
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}
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STDMETHODIMP MEDIA::get_TransportProtocol(BSTR * pVal)
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{
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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return GetElement().GetProtocol().GetBstrCopy(pVal);
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}
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STDMETHODIMP MEDIA::put_TransportProtocol(BSTR newVal)
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{
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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return GetElement().GetProtocol().SetBstr(newVal);
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}
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STDMETHODIMP MEDIA::get_FormatCodes(VARIANT /*SAFEARRAY (BSTR)*/ * pVal)
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{
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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return GetElement().GetFormatCodeList().GetSafeArray(pVal);
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}
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STDMETHODIMP MEDIA::put_FormatCodes(VARIANT /*SAFEARRAY (BSTR)*/ newVal)
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{
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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return GetElement().GetFormatCodeList().SetSafeArray(newVal);
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}
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STDMETHODIMP MEDIA::get_MediaTitle(BSTR * pVal)
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{
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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return GetElement().GetTitle().GetBstrCopy(pVal);
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}
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STDMETHODIMP MEDIA::put_MediaTitle(BSTR newVal)
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{
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CLock Lock(g_DllLock);
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ASSERT(GetElement().IsValid());
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return GetElement().GetTitle().SetBstr(newVal);
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}
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#define INTERFACEMASK (0xff0000)
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typedef IDispatchImpl<ITMediaVtbl<MEDIA>, &IID_ITMedia, &LIBID_SDPBLBLib> CMedia;
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//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++=
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//
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// MEDIA::GetIDsOfNames
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//
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//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++=
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STDMETHODIMP MEDIA::GetIDsOfNames(REFIID riid,
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LPOLESTR* rgszNames,
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UINT cNames,
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LCID lcid,
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DISPID* rgdispid
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)
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{
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HRESULT hr = DISP_E_UNKNOWNNAME;
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//
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// See if the requsted method belongs to the default interface
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//
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hr = CMedia::GetIDsOfNames(riid, rgszNames, cNames, lcid, rgdispid);
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if (SUCCEEDED(hr))
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{
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rgdispid[0] |= IDISPMEDIA;
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return hr;
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}
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//
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// If not, then try the ITConnection base class
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//
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hr = ITConnectionImpl::GetIDsOfNames(riid, rgszNames, cNames, lcid, rgdispid);
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if (SUCCEEDED(hr))
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{
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rgdispid[0] |= IDISPCONNECTION;
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return hr;
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}
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//
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// If not, then try the ITAttributeList base class
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//
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hr = ITAttributeListImpl::GetIDsOfNames(riid, rgszNames, cNames, lcid, rgdispid);
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if (SUCCEEDED(hr))
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{
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rgdispid[0] |= IDISPATTRLIST;
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return hr;
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}
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return hr;
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++=
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//
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// MEDIA::Invoke
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//
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//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++=
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STDMETHODIMP MEDIA::Invoke(DISPID dispidMember,
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REFIID riid,
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LCID lcid,
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WORD wFlags,
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DISPPARAMS* pdispparams,
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VARIANT* pvarResult,
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EXCEPINFO* pexcepinfo,
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UINT* puArgErr
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)
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{
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HRESULT hr = DISP_E_MEMBERNOTFOUND;
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DWORD dwInterface = (dispidMember & INTERFACEMASK);
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//
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// Call invoke for the required interface
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//
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switch (dwInterface)
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{
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case IDISPMEDIA:
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{
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hr = CMedia::Invoke(dispidMember,
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riid,
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lcid,
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wFlags,
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pdispparams,
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pvarResult,
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pexcepinfo,
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puArgErr
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);
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break;
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}
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case IDISPCONNECTION:
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{
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hr = ITConnectionImpl::Invoke(dispidMember,
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riid,
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lcid,
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wFlags,
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pdispparams,
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pvarResult,
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pexcepinfo,
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puArgErr
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);
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break;
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}
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case IDISPATTRLIST:
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{
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hr = ITAttributeListImpl::Invoke(dispidMember,
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riid,
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lcid,
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wFlags,
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pdispparams,
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pvarResult,
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pexcepinfo,
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puArgErr
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);
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break;
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}
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} // end switch (dwInterface)
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return hr;
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}
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