[Bug 108937] [radeonsi, RX480] VAAPI H.264 decoder produces garbage on YouTube in Chromium with h264ify

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108937

            Bug ID: 108937
           Summary: [radeonsi, RX480] VAAPI H.264 decoder produces garbage
                    on YouTube in Chromium with h264ify
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: kode54 at gmail.com
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 142707
  --> https://bugs.freedesktop.org/attachment.cgi?id=142707&action=edit
Screen shot of YouTube video in Chromium, artifacts

I am attempting to play H.264 video in Chromium, using a fork of the current
beta (v71) that has a VAAPI patch applied. When playing the following video:

https://www.youtube.com/watch?v=oiSn2JuDQSc

I get the resulting video output, attached.

Using:

Description:    Ubuntu 18.10
Release:        18.10

chromium-browser 71.0.3578.62-0ubuntu1~ppa1~18.10.1

mesa-va-drivers 19.0~git1812040730.bacf84~oibaf~c

It should be possible to follow those to the patches used, but I don't think
that the Chromium patch is responsible for "misusing" VA-API, so much as the
radeonsi VA-API driver being broken in some way.

The artifact simply goes away if I disable h264ify, since it switches to VP9,
and thus software decoding.

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