[Bug 781142] New: Seeking can be slow due to surface recreation

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=781142

            Bug ID: 781142
           Summary: Seeking can be slow due to surface recreation
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: thaytan at noraisin.net
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

gstreamer-vaapi seeking in 1.x can be significantly slower than in 0.10 on some
hardware (Z530) because the driver takes 40ms to create a surface. We didn't
used to recreate the entire decoder and surface pool on a seek, but now do.

Attached patches make that faster by adding a reset() method the backend vaapi
decoder that keeps the old surface pool around.

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