theora dev - Jun 2009 - Theora running on ARM device without floating point support

Hi masters, I am trying to deploy theora in Fressacle iMX27 (ARM-9) processor.
This hardware does not support floating point operations, i've
compiled the libtheora with ?--disable-float option .

mx27# cat /proc/cpuinfo
Processor ? ? ? : ARM926EJ-S rev 4 (v5l)
BogoMIPS ? ? ? ?: 199.06
Features ? ? ? ?: swp half thumb fastmult edsp java
CPU implementer : 0x41
CPU architecture: 5TEJ
CPU variant ? ? : 0x0
CPU part ? ? ? ?: 0x926
CPU revision ? ?: 4
Cache type ? ? ?: write-back
Cache clean ? ? : cp15 c7 ops
Cache lockdown ?: format C
Cache format ? ?: Harvard
I size ? ? ? ? ?: 16384
I assoc ? ? ? ? : 4
I line length ? : 32
I sets ? ? ? ? ?: 128
D size ? ? ? ? ?: 16384
D assoc ? ? ? ? : 4
D line length ? : 32
D sets ? ? ? ? ?: 128

Hardware ? ? ? ?: Freescale i.MX27ADS
Revision ? ? ? ?: 27021
Serial ? ? ? ? ?: 0000000000000000


In this example I will convert a yuv file with 150 frames (320x240 ~
17280000 bytes ) ? to an ogg file


mx27# time ./yuv2theora
File size = 17280000
This video has 150 frames!

real ? ?1m1.641s
user ? ?1m0.800s
sys ? ? 0m0.390s

Unfortunately the performance is not that good.

As a result I've converted a ~17MB yuv file to an 473KB ogg file in 61
seconds using 99% of CPU.


Any way to improve this?


The source code used in this test is available at :

http://www.imxdev.org/wiki/images/c/cd/Yuv2theora.gz

Thanks in advance

--
Hamilton Vera
int Administrator (char Network[],char ComputationalSystems[])
http://hvera.wordpress.com