Empty BYTE vector from Wasapi stream capture session - c++

Question

My main goal is to capture 2 audio streams and store them as a vector<BYTE> then come up with a congruence algorithm to check for equality. Right now I am only capturing one stream, however the values of the stream are 0 '/0'. Why am I getting null terminated values for all elements in my BYTE vector?
void AudioDeviceOperator::TakeInput(AudioStreamModel* m)
{
HRESULT hr;
IAudioClient *iac = NULL;
IAudioCaptureClient *pCaptureClient = NULL;
WAVEFORMATEX *mixFormat;
UINT32 bufferFrameCount;
HRESULT de;
de = AudioDeviceEnumerator -> GetDefaultAudioEndpoint(eCapture, eConsole, &SelectedAudioDeviceModel->AudioDevice);
hr = SelectedAudioDeviceModel->AudioDevice -> Activate(IID_IAudioClient, CLSCTX_ALL, NULL, (void**)&iac);
REFERENCE_TIME bufferDuration = 0; //default to min
REFERENCE_TIME periodicity = 0;
GUID trashGuid;
HRESULT tg = CoCreateGuid(&trashGuid);
LPCGUID AudioSessionGuid = &trashGuid;
GUID guid2 = *AudioSessionGuid;
HRESULT guidError = UuidCreate(&guid2); //project -> properties -> Linker -> Command Line -> Rpctr4.lib
iac->GetMixFormat(&mixFormat);
m->StreamFormat = *mixFormat;
if (SUCCEEDED(guidError)) {
cout << "/n" << "Initializing audio stream..";
hr = iac->Initialize(AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_CROSSPROCESS, bufferDuration, periodicity, mixFormat, AudioSessionGuid);
cout << hr;
hr = iac->GetBufferSize(&bufferFrameCount);
cout << hr;
iac->GetService(IID_IAudioCaptureClient, (void**)&pCaptureClient);
// Calculate the actual duration of the allocated buffer.
double hnsActualDuration = (double)REFTIMES_PER_SEC * bufferFrameCount / mixFormat-> nSamplesPerSec;
bool recordAudio = TRUE;
BYTE *sData;
UINT32 numFramesAvailable = 0;
DWORD flags;
UINT32 packetLength = 0;
int numOfPackets = 0;
iac->Start();
while (recordAudio == TRUE)
{
hr = pCaptureClient->GetNextPacketSize(&packetLength);
while (packetLength != 0) {
hr = pCaptureClient->GetBuffer(&sData, &numFramesAvailable, &flags, NULL, NULL);
if (sData != NULL) {
m->Stream.push_back((*sData)); //here is where I write to the vector
numOfPackets++;
}
if (numOfPackets == 100) { // just getting 100 packets for testing
recordAudio = FALSE;
break;
}
}
hr = pCaptureClient->ReleaseBuffer(numFramesAvailable);
}
}
else
cout << "AudioSessionGuidError";
CoTaskMemFree(iac);
AudioDeviceEnumerator->Release();
//pCaptureClient->Release(); // releaseBuffer seeming to release capture client interface as weell.
};
When the audio session starts I make sure to make some noise. With the vector values the way they are I have nothing to compare. I'm also assuming that using that byte vector and rendering it with a IAudioRenderClient will result in nothing, however that is my next plan of action. Any ideas??