#include <dshow.h>
#include <iostream>
#include <mmdeviceapi.h>
#include <uuids.h>

void print_device() {
  // Create the System Device Enumerator.
  HRESULT hr;
  ICreateDevEnum *pSysDevEnum = NULL;
  hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,
      IID_ICreateDevEnum, (void **)&pSysDevEnum);
  if (FAILED(hr))
  {
      return;
  }

  // Obtain a class enumerator for the video compressor category.
  IEnumMoniker *pEnumCat = NULL;
  hr = pSysDevEnum->CreateClassEnumerator(CLSID_VideoCompressorCategory, &pEnumCat, 0);

  if (hr == S_OK)
  {
      // Enumerate the monikers.
      IMoniker *pMoniker = NULL;
      ULONG cFetched;
      while(pEnumCat->Next(1, &pMoniker, &cFetched) == S_OK)
      {
          IPropertyBag *pPropBag;
          hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag,
              (void **)&pPropBag);
          if (SUCCEEDED(hr))
          {
              // To retrieve the filter's friendly name, do the following:
              VARIANT varName;
              VariantInit(&varName);
              hr = pPropBag->Read(L"FriendlyName", &varName, 0);
              if (SUCCEEDED(hr))
              {
                std::wcout << varName.bstrVal << 'n';
              }
              VariantClear(&varName);
          }
          pMoniker->Release();
      }
      pEnumCat->Release();
  }
  pSysDevEnum->Release();
}

int main() {
  // Initializes
  CoInitialize( NULL );

  // loop to test leak
  while( true ) {
    print_device();
  }
}