[Bug 759389] fakesrc ! wasapisink and any other combination raises The stream is in the wrong format

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=759389

--- Comment #20 from Sebastian Dröge (slomo) <slomo at coaxion.net> ---
(In reply to Marcin Lewandowski from comment #19)

> I've read Thomas patches maybe I don't understand something but I think the
> right approach to implement get_caps() would have been to call
> IAudioClient::GetMixFormat which returns internal mix format used by WASAPI
> in the shared mode and return it as caps.

Sounds reasonable

> The second approach, that even might be better is to call
> IAudioClient::IsFormatSupported with given caps and return these caps if
> format matches or closest one (WASAPI returns information about closest
> matching format if there's no exact match).

That seems like it would require probing then. You would have to iterate over a
set of known formats in get_caps() and check if they are supported (and ideally
cache that information). Similar to what alsasink (or v4l2src) already does (so
yes, that's also an option).

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