[Bug 769293] New: vaapi/gl : Uploading to GL texture optimization

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=769293

            Bug ID: 769293
           Summary: vaapi/gl : Uploading to GL texture optimization
    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: zzoon at igalia.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

Currently, vaapi is using UploadMeta to upload to GL texture.
But performance is not good.

To make it better, we need to do the following:
1. Use bufferpool in glupload when processing UploadMeta.
2. Implement to reuse VaapiTexture according to texture id which is passed from
glupload.

As far as I experiment, I saw performance gets much better than now and cpu
usage gets lower.

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