On 03/10/2008 01:39 AM, Siarhei Siamashka wrote: > c3x00 support iwmmxt instructions, so decoding video should be probably > faster there.
I did some tests two years ago with different xvid encoding options. It left me the impression that the bottle neck on zaurus is screen redrawing instead of decoding. So I guess the bvdd part helps the video performance on c3x00 much more than iwmmxt optimized instructions. Please correct me if I'm totally off the base. > As for bvdd, I suggested my help in adapting Nokia 770 optimized software > scaler (it is used in maemo build of mplayer) to use it with bvdd long ago > and more than once, but nobody seemed interested. It is not much work, but I > don't have zaurus myself, so I would need someone willing and able to compile > and test mplayer on this device. But this will only help in processing > arbitrary video resolutions (useful for nontranscoded video). If nonscaled > video (or 2x scaled by hardware) is still slow, that will not help much. I'm certainly interested. I think once Angstrom stabilizes and more users come to use it on daily basis. The demand for this feature will be increasing. > BTW, when transcoding video, both GMC and QPEL are bad for performance. > B-frames are good as they allow easy framedropping. In my limited test of transcoding the movies, GMC on or off makes little difference on performance on my tosa. That is one of the factor that influenced my impression that decoding is not the bottle neck on Z. Regards Gordon _______________________________________________ Angstrom-distro-users mailing list [email protected] http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-users
