DeckLinkCapture(IDeckLink *card, int card_index); // Takes ownership of <card>.
~DeckLinkCapture();
+ IDeckLinkInput *get_input() const { return input; }
+
// IDeckLinkInputCallback.
HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, LPVOID *) override;
ULONG STDMETHODCALLTYPE AddRef() override;