Bug 92729

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