[PATCH 02/10] mf: Do some error checkings in _Load().

[Nikolay Sivov]

On 6/15/20 4:41 AM, Sergio Gómez Del Real wrote:
> +    if (FAILED(IMFTopology_GetNodeCount(input_topology, &count))
> +        || count < 2)
> +    {
> +        hr = MF_E_TOPO_UNSUPPORTED;
> +        return hr;
> +    }
This should come up later as more generic case of zero branches, or
badly incomplete output topology.

> +
> +    if (FAILED(hr = MFCreateTopology(output_topology)))
> +        return hr;
> +
> +    i = 0;
> +    while (SUCCEEDED(IMFTopology_GetNode(input_topology, i++, &node)))
>      {
Won't moving creation call before the loop leak output topology on error
case?
I seems unlikely that on error condition it still returns empty output
topology.