Re: [PATCH v3 0/4] MR7570: mfreadwrite: Implement encoder creation. (Part 1)

[Nikolay Sivov (＠nsivov)]

Nikolay Sivov (@nsivov) commented about dlls/mfreadwrite/writer.c:
> -
>        entry = &stream->converter;
> -
>        break;
> -
>    default:
> -
>        LeaveCriticalSection(&writer->cs);
> -
>        return MF_E_INVALIDINDEX;
> - }
> -
> - if (!entry->transform)
> - {
> -
>    LeaveCriticalSection(&writer->cs);
> -
>    return MF_E_INVALIDINDEX;
> - }
> -
> - IMFTransform_AddRef((*transform = entry->transform));
> - if (category)
> -
>    *category = entry->category;

Category GUIDs are fixed, so if we know for sure that you can only have one encoder and one converter at most, we can simply return corresponding constants here.