CedarX/Reverse Engineering

= Progress history =

15 June 2012
Iain Bullard started reverse engineering the proprietary libraries.


 * open_cdxalloc as an free reimplementation of Allwinner's libcederxalloc.a.
 * CedarXWrapper as a LD_PRELOADed wrapper to help understanding the proprietary libraries.
 * CedarXPlayerTest as a basic player to use when testing.
 * ReCedro has similar tools as those from IanB above, but with a different angle, works really well.

3 May 2013
wingrime started work on register guide, JPEG, MPEG decoding manuals

???
nove introduced new MMIO tracer based on Valgrind

22 June 2013
JPEG decoding proof-of-concept was introduced by Jemk

JPEG/MPEG-12 Decoding PoC

30 August 2013
Workable proof-of-concept VDPAU decoder was introduced by Jemk support MPEG-1/2 and MPEG-4 AVC/h.264 decoding

libvdpau-sunxi

12 January 2014
First MPEG-4 AVC/h.264 encoder proof-of-concept from Jemk

= Current status =

Reverse Engineering/Cedar Status

= Hardware registers = Blob use direct access to hardware registers using mmap to userspace. Currently known register usage in manuals:


 * VE Register guide
 * ACE Register guide

There's ongoing register documentation effort using envytools.