get_allowed_caps

Gets the capabilities of the allowed media types that can flow through this and its peer.

The allowed capabilities is calculated as the intersection of the results of calling query_caps on this and its peer. The caller owns a reference on the resulting caps.

Parameters:

this

a Pad.

Returns:

the allowed Caps of the pad link. Unref the caps when you no longer need it. This function returns null when this has no peer. MT safe.