[gstreamer-bugs] [Bug 515689] New: Core is dumped in a race condition with gnonlin

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gstreamer (core) | Ver: 0.10.0
           Summary: Core is dumped in a race condition with gnonlin
           Product: GStreamer
           Version: 0.10.0
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: dskippy at ccs.neu.edu
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


# This program segfaults a dumps core. This is a reduction from my program
# there is some short of race condtion. If there's a sleep between
# the first and second gnlcomposition1.add() it fails.

import gobject
gobject.threads_init()
import pygst
pygst.require("0.10")
import gst
import time

main_loop = gobject.MainLoop()
pipeline = gst.Pipeline()
adder = gst.element_factory_make("adder")
lame = gst.element_factory_make("lame")
fakesink = gst.element_factory_make("fakesink")
pipeline.add(adder, lame,fakesink)
# taking lame out of the pipeline stops the coredump
gst.element_link_many(adder, lame, fakesink)

# Add one compostion
gnlcomposition1 = gst.element_factory_make("gnlcomposition")
audioconvert1 = gst.element_factory_make("audioconvert")
pipeline.add(gnlcomposition1, audioconvert1)
def OnPad (comp, pad):
        convpad = audioconvert1.get_compatible_pad(pad, pad.get_caps())
        pad.link(convpad)
gnlcomposition1.connect("pad-added", OnPad)
srcpad = audioconvert1.get_pad('src')
addersinkpad = adder.get_request_pad('sink%d')
srcpad.link(addersinkpad)

# Add second compostion
gnlcomposition2 = gst.element_factory_make("gnlcomposition")
audioconvert2 = gst.element_factory_make("audioconvert")
pipeline.add(gnlcomposition2, audioconvert2)
def OnPad (comp, pad):
        convpad = audioconvert2.get_compatible_pad(pad, pad.get_caps())
        pad.link(convpad)
gnlcomposition2.connect("pad-added", OnPad)
srcpad = audioconvert2.get_pad('src')
addersinkpad = adder.get_request_pad('sink%d')
srcpad.link(addersinkpad)

def add():
        print "Going..."
        filesrc = gst.element_factory_make("gnlfilesource")
        filesrc.set_property("location", "/home/dskippy/17years.mp3")
        #not givin the filesrc a duration stops the coredump
        filesrc.set_property("duration", 1 * gst.SECOND)
        gnlcomposition1.add(filesrc)
        #taking this sleep out changes the race condition
        #and stops the coredump
        time.sleep(1)
        dead_air = gst.element_factory_make("gnlsource")
        gnlcomposition1.add(dead_air)

pipeline.set_state(gst.STATE_PLAYING)
gobject.idle_add(add)
main_loop.run()


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You can add comments to this bug at http://bugzilla.gnome.org/show_bug.cgi?id=515689.