IAMAudioInputMixer * GetMixer(IPin * inPin)
{
IAMAudioInputMixer * pMixer = NULL;
inPin->QueryInterface(IID_IAMAudioInputMixer, (void**) &pMixer);
if (pMixer)
{
pMixer->Release();
}
return pMixer;
}
HRESULT CALLBACK EnumInputCallBack( const char* pName/*返回值*/, IPin * pin /*设备*/, LPVOID lp/*参数*/, BOOL& bCancel/*是否退出循环*/ )
{
char* p = (char*)lp;
if( strcmp( p, pName )==0 )
{
bCancel = TRUE;
IAMAudioInputMixer * pMixer = GetMixer(pin);
if( pMixer->put_Enable(TRUE)==S_OK )
{
if( pMixer->put_MixLevel(AMF_AUTOMATICGAIN) != S_OK )
{
return S_FALSE;
}
}
else
return S_FALSE;
}
return S_OK;
}
HRESULT CKTVDlg::activePin(IBaseFilter* filter, int index, wchar_t* str /*= NULL*/ , int pinIndex )
{
HRESULT r = -1;
int nActivePin = -1;
if (pinIndex == -1)
{
if (GetWinVersion() >= WINVERSION_VISTA)
{
nActivePin = 0;
}
else
{
for (int j = 0; j < m_captureFilterVec[index].PinVec.size(); j++)
{
if (m_captureFilterVec[index].PinVec[j].find(str) != wstring::npos)
{
nActivePin = j;
break;
}
}
}
}
else
{
nActivePin = pinIndex;
}
IPin *pPin=0;
IAMAudioInputMixer *pPinMixer;
// How many pins are in the input pin list?
int nPins = m_captureFilterVec[index].PinVec.size();
// Activate the selected input pin and deactivate all others
for (int i=0; i<nPins; i++)
{
// Get this pin's interface
r = GetPin(filter, PINDIR_INPUT, i, &pPin);
if (SUCCEEDED(r))
{
r = pPin->QueryInterface(IID_IAMAudioInputMixer, (void **)&pPinMixer);
if (SUCCEEDED(r))
{
// If this is our selected pin, enable it
if (i == nActivePin)
{
// Set any other audio properties on this pin
//r = SetInputPinProperties(pPinMixer);
// If there is only one input pin, this method
// might return E_NOTIMPL.
r = pPinMixer->put_Enable(TRUE);
}
// Otherwise, disable it
else
{
//r = pPinMixer->put_Enable(FALSE);
}
pPinMixer->Release();
}
// Release pin interfaces
pPin->Release();
}
}
return S_OK;
}
