[gst-devel] Using g_singal_emit() in GStreamer

[Tim-Philipp Müller]

On Thu, 2009-12-17 at 14:40 -0500, José Alburquerque wrote:

Hi,

> Some plug-ins have "action signals" with no return.  For example,
>  fakesrc's "handoff" signal (which looks to be registered with the
>  G_SIGNAL_ACTION flag) returns void.  Others don't have parameters
>  either like queue's "underrun" signal.

Neither of those two is an action signal or registered with
G_SIGNAL_ACTION as far as I can tell.

Which is not to say that there aren't action signals with no return
value, see e.g. multifdsink.


> Sorry if it's a simple question, but what would be the purpose of
> emitting these signals from the outside as opposed to within the
> plug-ins?

As you suspect, emitting those signals from outside those elements
indeed doesn't really make sense.

 Cheers
  -Tim