[Spice-devel] Questions about VAAPI

[Fabio Fantoni]

After persistent fails with qxl on spice with xen, I'm trying to use it 
with standard vga, spice-client-gtk:
- on notebook with good hardware it has sufficent graphic performance
- on good atom thin client the performances are poor (high cpu usage and 
high video refresh latency).

The latest test with qxl on xen give:

the qemu log is full of these:
__spice_char_device_write_buffer_get: internal buf is not available

the spicy with debug gave a lot of these:
(spicy:3907): GSpice-DEBUG: decode-glz.c:372 decode_header: 16x16, id 
5762, ref 5037
(spicy:3907): GSpice-DEBUG: spice-channel-cache.h:92 cache_find: image 
c417fece24020010 [not found]
(spicy:3907): GSpice-DEBUG: spice-channel-cache.h:108 cache_add: image 
c417fece24020010 (257)

I not know if can help.



I think that VAAPI can be very useful with video performance.
I read time ago here that are in the roadmap.
Are there experimental patches or nothing for now?

Latest intel driver seem to have also mjpeg hardware acceleration 
(https://01.org/linuxgraphics/downloads/2013/2013q1-intel-graphics-stack-release). 
Is possible to get fast vaapi implementation with actual mjpeg encoding 
or is a waste of time?

Thanks for any reply

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