Why does ActivateObject function return E_POINTER? - c++

Question

i'm trying to work with windows media fundation, get hang of it. I was following steps from this tutorial, and at some point i got stuck.
Let me describe my problem.
I am calling ActivateObject function from object IMFActivate.
This function call is presented in tutorial, I guess, in proper way, so I just copy-pasted it and didn't put a lot of thought on it.
After I completed all steps from tutorial (and wrapped it in class myself(!!)), I tried to run it, and HRESULT from that function call is E_POINTER which means that invalid pointer was passed.
I won't copy-paste my whole code, i'll narrow it down to objects used, and call itself.
Here is how function call looks like:
HRESULT MediaMultiplexer::AddTransformOutputNodes(
IMFTopology* pTopology,
IMFActivate* pSinkActivate,
IMFMediaType* pSourceType,
IMFTopologyNode** ppNode
)
{
if (!pTopology || !pSinkActivate || !pSourceType)
{
return E_INVALIDARG;
}
IMFTopologyNode* pEncNode = NULL;
IMFTopologyNode* pOutputNode = NULL;
IMFASFContentInfo* pContentInfo = NULL;
IMFASFProfile* pProfile = NULL;
IMFASFStreamConfig* pStream = NULL;
IMFMediaType* pMediaType = NULL;
IPropertyStore* pProps = NULL;
IMFActivate* pEncoderActivate = NULL;
IMFMediaSink* pSink = NULL;
GUID guidMT = GUID_NULL;
GUID guidMajor = GUID_NULL;
DWORD cStreams = 0;
WORD wStreamNumber = 0;
HRESULT hr = S_OK;
hr = pSourceType->GetMajorType(&guidMajor);
if (FAILED(hr))
{
goto done;
}
// Create the node.
hr = MFCreateTopologyNode(MF_TOPOLOGY_TRANSFORM_NODE, &pEncNode);
if (FAILED(hr))
{
goto done;
}
//Activate the sink
hr = pSinkActivate->ActivateObject(__uuidof(IMFMediaSink), (void**)&pSink); //THIS CALL!!!!!
if (FAILED(hr))
{
goto done;
}
//find the media type in the sink
//Get content info from the sink
hr = pSink->QueryInterface(__uuidof(IMFASFContentInfo), (void**)&pContentInfo);
if (FAILED(hr))
{
goto done;
}
And here is how i prepare IMFActivate used to call that function:
bool MediaMultiplexer::setFileName(std::string _fileName)
{
HRESULT hr;
hr = MFCreateASFMediaSinkActivate(std::wstring(_fileName.begin(), _fileName.end()).c_str(), m_globalContentInfo, &m_globalActivate);
if (FAILED(hr))
{
printError("Failed creating ASF media sink activate", hr);
return false;
}
m_globalActivate->AddRef();
return true;
}
I just started working with MediaFundation so I don't know how important that is, so I'll show how i prepare contentInfo aswell, which is used to create IMFActivate.
HRESULT hr;
hr = MFCreateASFContentInfo(&m_globalContentInfo);
if (FAILED(hr))
{
printError("Failed to create global content info", hr);
return false;
}
PROPVARIANT var;
var.vt = VT_BOOL;
var.boolVal = VARIANT_TRUE;
hr = m_globalContentInfo->GetEncodingConfigurationPropertyStore(0, &m_globalStore);
if (FAILED(hr))
{
printError("Failed getting global store configuration", hr);
return false;
}
hr = m_globalStore->SetValue(MFPKEY_ASFMEDIASINK_AUTOADJUST_BITRATE, var);
if (FAILED(hr))
{
printError("Failed setting value for bitrat adjust", hr);
return false;
}
Hope someone can help me, and thus, in future, anyone with similar issue will find his answer here :).
And i'm sorry for any sort of english related mistakes, i'm still just learning this language.

Answer 1

I am stupid :)
I found mistake in my code.
While setting m_globalContentInfo i forgot to set profile.
In code it should be something like that:
//...
hr = m_globalStore->SetValue(MFPKEY_ASFMEDIASINK_AUTOADJUST_BITRATE, var);
if (FAILED(hr))
{
printError("Failed setting value for bitrat adjust", hr);
return false;
}
// I missed that part ealier
hr = m_globalContentInfo->SetProfile(m_profile);
if (FAILED(hr))
{
printError("Failed setting global profile");
return false;
}