I have program on an i.MX27 working as follow :
RGB565 video stream input ---> RGB565 to YUV420 colorspace conversion ---> H.264 encoding ---> rtp stream
I wrote an algorithm to convert RGB to YUV but it's a bit slow for large resolution and I saw that I could use the pre-processor for the conversion (see http://www.freescale.com/files/32bit/doc/ref_manual/MCIMX27RM.pdf section 41.5.5). But I have no idea how to use/configure the pre-processor.
So I'm looking for any tutorial or documentation about how to use the pre-processor on an MX27.
I only found https://community.freescale.com/message/33151 which is about post-processor.
Thank you for any help,