Re: [Bug 20816] "Hold" unspecified

>> 3) change directionality of a stream
>>      sendonly, sendrecv, recvonly
>
>
> This requires the manipulation of an object that does not have explicit
representation at the current API surface.

And that is exactly the problem and limitation. We are forced by WebRTC  to
use SDP but we cannot play with SDP features.

We need an API for setting  directionality of each media stream, and also
an API for retrieving those attibutes from a received and processed SDP.