// IDeckLinkInputCallback.
HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, LPVOID *) override;
ULONG STDMETHODCALLTYPE AddRef() override;
// IDeckLinkInputCallback.
HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, LPVOID *) override;
ULONG STDMETHODCALLTYPE AddRef() override;