[Bug 648195] New: outputselector: make it "swap-safe"
GStreamer (bugzilla.gnome.org)
bugzilla at gnome.org
Tue Apr 19 03:53:50 PDT 2011
https://bugzilla.gnome.org/show_bug.cgi?id=648195
GStreamer | gstreamer (core) | git
Summary: outputselector: make it "swap-safe"
Classification: Platform
Product: GStreamer
Version: git
OS/Version: All
Status: UNCONFIRMED
Severity: major
Priority: Normal
Component: gstreamer (core)
AssignedTo: gstreamer-bugs at lists.freedesktop.org
ReportedBy: havard.graff at tandberg.com
QAContact: gstreamer-bugs at lists.freedesktop.org
GNOME version: ---
Created an attachment (id=186266)
--> (https://bugzilla.gnome.org/attachment.cgi?id=186266)
test-case that defines the desired behavior
With this patch, setting active-pad blocks against any activity on that pad.
After you have sat active-pad, you are guaranteed that all pad-traffic,
aka. chain, bufferalloc and event, have ceased on the pad being switched
from.
This is very useful for dynamic pipelinbuilding, where you now safely can
swap-out, unlink and remove any element without having to worry about a push
or a pad-alloc sneaking in at the last minute, hitting elements that are on
their way out.
All pad-traffic is still kept non-serialized, aka, you can have a pad-alloc
while a push in in progress, while an OOB-event is underway.
Also some general cleanup and bugfixes for MT-safety.
Attached is a test-case for this behavior, as well as a proposed patch.
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