The problem I have with that approach however is that the elements will be set to NULL after passing ownership to the bin, so I can no longer use them in the functions. What I need is the ability to pass ownership and change them into weak references for the rest of the function scope. I don't suppose there is any way of achieving this is there?
Matt -----Original Message----- From: Thijs Vermeir [mailto:[EMAIL PROTECTED] Sent: 14 November 2008 17:15 To: Spencer, Matthew Cc: vala-list@gnome.org Subject: Re: [Vala] Problem with gstreamer bin On Fri, Nov 14, 2008 at 6:12 PM, Spencer, Matthew <[EMAIL PROTECTED]> wrote: > I thought it was something like this. Thanks for the feedback, this > has fixed the problem. > > Reading through the documents, shouldn't I be able to do something like: > > bin.add_many(#element1,#element2,#elemenr3) > > To indicate to valac the passing of ownership to the bin? Yes, that should also work. Gr, Thijs > > Matt > > -----Original Message----- > From: Thijs Vermeir [mailto:[EMAIL PROTECTED] > Sent: 14 November 2008 17:07 > To: Spencer, Matthew > Cc: vala-list@gnome.org > Subject: Re: [Vala] Problem with gstreamer bin > > Hi, > > 2008/11/14 Spencer, Matthew <[EMAIL PROTECTED]>: >> Hi Guys >> >> I am playing with Vala with a view to presenting information about it >> at our companies developer conference in a couple of weeks. With >> this > >> in mind I am trying to build up a test application that shows video >> playback using GStreamer. I am having problems with the following > code: >> >> private Element createVideoBin() { >> var bin=new Bin("videobin"); >> var queue=ElementFactory.make("queue","queue"); >> var sink=ElementFactory.make("autovideosink","videosink"); >> var ghostPad=new GhostPad("sink",queue.get_pad("sink")); >> bin.add_many(queue,sink); >> queue.link(sink); >> bin.add_pad(ghost); >> return(bin); >> } > > bin.add_many is the problem because the c function takes the > ownership, but the bindings don't do it. Just use bin.add for every > element as a workaround... > > Gr, > Thijs > >> When attempting to use the returned bin, I get a segfault. This is >> because (I think, on examining the generated C code) the elements are >> being unrefd before the bin is returned. I am sure this is not > supposed to happen. >> >> I get a number of error messaged when running the app: >> (mystreamer:16361): GStreamer-CRITICAL **: >> Trying to dispose of object "videosink", but it still has a parent >> "videobin". >> You need to let the parent manage the object instead of unreffing the >> object directly. >> >> I am assuming this is because I need to inform the code that I wish >> to > >> transfer ownership of the objects to the 'Bin', but how do I do this, >> and is there a way that this can be picked up by the compiler to >> prevent this type of problem? >> >> Cheers >> >> Matt >> ********************************************************************* >> * >> *********************************** >> This e-mail is confidential, the property of NDS Ltd and intended for >> the addressee only. Any dissemination, copying or distribution of >> this > >> message or any attachments by anyone other than the intended >> recipient > >> is strictly prohibited. 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