[Bug 92729] VDPAU: Maybe support H264_CONSTRAINED_BASELINE

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92729

            Bug ID: 92729
           Summary: VDPAU: Maybe support H264_CONSTRAINED_BASELINE
           Product: Mesa
           Version: 11.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: andreaskem at web.de
        QA Contact: dri-devel at lists.freedesktop.org

Hi,

I am not sure if this is the proper place to report this, so feel free to send
me somewhere else and I apologize in advance.

I am on the Mesa 11.0.4 r600 driver with the following device:
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Wrestler [Radeon HD 7340]
and Xorg 1.17.3. (Arch Linux with testing repository enabled, everything
up-to-date).

vdpauinfo reports (see attachment) that the H.264 profiles H264_BASELINE,
H264_MAIN, and H264_HIGH are supported for VDPAU hardware acceleration.
However, H264_CONSTRAINED_BASELINE is marked "not supported". Now, if the
Wikipedia article about H.264 profiles is to be believed [1], the constrained
profile only needs a "subset of features that are in common between the
Baseline, Main, and High Profiles." Consequently, I would expect
H264_CONSTRAINED_BASELINE to be supported, as well.

See also the bug report I filed for mpv a few weeks ago [2].

Moreover, H264_PROGRESSIVE_HIGH and H264_CONSTRAINED_HIGH seem to be "Similar
to the High profile, but without support of field coding features." and
"Similar to the Progressive High profile, but without support of B
(bi-predictive) slices." respectively. However, vdpauinfo reports "not
supported" for both.

As I am writing this, I also notice that VC1_ADVANCED is supported, but
VC1_MAIN and VC1_SIMPLE are not. Reading [3], I would expect the same reasoning
to apply.

Is there something I am missing?

[1] https://en.wikipedia.org/wiki/H.264/MPEG-4_AVC#Profiles
[2] https://github.com/mpv-player/mpv/issues/2347
[3] https://en.wikipedia.org/wiki/VC-1#Profiles

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