[gst-devel] bug?

Thomas Vander Stichele thomas at urgent.rug.ac.be
Thu May 9 02:34:02 CEST 2002

Hey Jorn,

> I bumped into something that probably is a gstreamer bug, i cannot see
> what might be wrong here:
> Basic monkeymedia arch:
> [ MonkeyMediaAudioStream              ]=>[ MonkeyMediaMixer      ]
> [ GnomeVFSSrc ]=>[ Spider ]=>[ Volume ]=>[ Volume ]=>[ Audiosink ]

between volume and volume there is an adder which does the mixing.

> If an EOS event is received from the gnomevfssrc, a signal is prepared
> and
> put in a signal queue which is processed by a timeout function in the
> main thread, so that users dont have to worry about threading issues.
> (BTW what would be the best place to catch EOS signals from? gnomevfssrc
> emits it too early for proper use in monkeymedia, since it's emitted
> when the data ends, not when the playback ends. The audiosink is not an
> option either since it's not stream-specific in this case.)

in theory gnomevfssrc will push out an eos event right after the last 
buffer.  When this event reaches adder, adder will send an event back that 
tells all of the plugins to close up, or might send a signal to the app to 
say "clean up this input pipe".

In practice, events are still to be added to allow for this to happen.

> If the mixer catches the new eos signal from the main thread it
> disconnects the stream and the mixer, and a new stream is dragged in
> and hooked up. So far so good, scheduler dumps, everything looks
> alright. But when i try to set the state to GST_STATE_PLAYING again (i
> set it to NULL before fiddling with the stream, i tried everything,
> PAUSED, STOPPED ..), it just locks up right there in the
> gst_element_set_state. This all happens from the main thread.

I will take a look at it.  Is this code I added or code you added ? The 
demo mix app I put in monkey sound works for me.  At least I did when I 
committed it ;)

I'll look it over as soon as I have the time.  Others are of course 
welcome to join in ;)



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