[Mesa-dev] [PATCH] st/va: add mpeg4 startcode workaround

[Ilia Mirkin]

On Fri, Nov 6, 2015 at 1:48 PM, Zhang, Boyuan <Boyuan.Zhang at amd.com> wrote:
> Hi Emil,
>
> Please see the following information about this patch.
>
> - Issue: For Mpeg4, the VOP and GOV headers were truncated. With the existing workaround in st/va, playback shows massive corruptions.
> - This Patch: Provide another way to get the truncated headers back. Massive corruptions are gone with this patch. At the same time, add an environmental variable to allow user to decide whether to use this patch.

Why would the user not want to use this? Sounds like a correctness
fix, no? Or is it some thing that a hypothetical gallium driver might
not need but the radeon uvd-based ones do? In that case it should be
behind a PIPE_VIDEO_CAP_bla (sorry, I'm still not too clear on what
"bla" is here...)

  -ilia