[GMA X4500] GPU video decoding (VA-API?)

[whizse]

Uh? Does it already work with GMA X4500? O_O

I think it still requires kernel patches?

[burley blend]

Interesting, but what now?

I have Linux 2.6.35-rc2, libdrm git 20100609, and libva git HEAD.

After building with --enable-i965-driver I get:

$ vainfo 
libva: libva version 0.31.1
libva: va_getDriverName() returns 0
libva: Trying to open /usr/lib/dri/i965_drv_video.so
libva: va_openDriver() returns 0
vainfo: VA API version: 0.31
vainfo: Driver version: i965 Driver 0.1
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            :	VAEntrypointVLD
      VAProfileMPEG2Main              :	VAEntrypointVLD
      VAProfileH264Baseline           :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointVLD
      VAProfileH264High               :	VAEntrypointVLD
vainfo: i965_media.c:295: i965_media_terminate: Assertion `media_state->free_private_context' failed.
Aborted

And using mplayer-vaapi

$ mplayer -quiet -vo vaapi -va vaapi h264.mp4 
MPlayer SVN-r31303-4.4.3 (C) 2000-2010 MPlayer Team

Playing h264.mp4.
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
VIDEO:  [H264]  320x240  24bpp  12.000 fps  1159.2 kbps (141.5 kbyte/s)
Clip info:
 major_brand: isom
 minor_version: 512
 compatible_brands: isomiso2avc1mp41
 encoder: Lavf52.32.0
libva: libva version 0.31.1
libva: va_getDriverName() returns 0
libva: Trying to open /usr/lib/dri/i965_drv_video.so
libva: va_openDriver() returns 0
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
[VD_FFMPEG] VA API accelerated codec.
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
Audio: no sound
Starting playback...
Unsupported PixelFormat 61
[VD_FFMPEG] Trying pixfmt=1.
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
VO: [vaapi] 320x240 => 320x240 H.264 VA-API Acceleration  [fs]
[VD_FFMPEG] XVMC-accelerated MPEG-2.
mplayer: i965_avc_ildb.c:621: i965_avc_ildb_decode_init: Assertion `avc_ildb_context->urb.cs_start + avc_ildb_context->urb.num_cs_entries * avc_ildb_context->urb.size_cs_entry <= ((((&i965->intel)->device_id == 0x0042) || ((&i965->intel)->device_id == 0x0046)) ? 1024 : (((&i965->intel)->device_id == 0x2E02 || (&i965->intel)->device_id == 0x2E12 || (&i965->intel)->device_id == 0x2E22 || (&i965->intel)->device_id == 0x2E32) || ((&i965->intel)->device_id == 0x2A42)) ? 384 : 256)' failed.

Am I testing too early?

[whizse]

I'm still not sure if the kernel side of things have been mainlined yet? And that assertion failure you're getting when just running vainfo seems to indicate badness...

A status update from the Intel devs, or a short Phoronix article would be very welcome.

[whizse]

From the notes in the new libdrm release, it sounds like it should work with 2.6.35. I guess filing a bug is in order, or trying the latest kernel snapshot first.

[burley blend]

I’m not sure if GM45 chipset is already supported, or if this is only meant to support Ironlake yet.

Do you have concrete mentions of GM45, G45?

[whizse]

From the libdrm release notes:

1) media ring support on kernel 2.6.35 for doing media decode on G45+

I guess this includes GM45 too?

[burley blend]

But there is no mention here:

http://www.freedesktop.org/wiki/Software/vaapi

I guess some bits are still missing?

[burley blend]

Word from the developer:

No, GM45 support will schedule for Q3 this year.

Thanks
Zou Nan hai

[beecher]

I was wondering why does it take so long to implement this feature when they have all the specs they need ? Does this represent a lot of lines of codes in the driver ?

[burley blend]

I was wondering why does it take so long to implement this feature when they have all the specs they need ? Does this represent a lot of lines of codes in the driver ?

Yes, the patches that went in recently had quite a long, invasive diffstat.