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| author | Amaury Pouly <amaury.pouly@gmail.com> | 2015-03-23 21:30:06 +0100 |
|---|---|---|
| committer | Gerrit Rockbox <gerrit@rockbox.org> | 2015-03-29 14:08:28 +0200 |
| commit | b130b507349952cbab2a371628891de78cc8dda2 (patch) | |
| tree | c2cc360f4fc8b14f704e93f89783ad7c31c2e67a /apps/playlist_viewer.c | |
| parent | 32154bfc0be5fa57ddc5f70c51c4162f4dceb0e8 (diff) | |
| download | rockbox-b130b507349952cbab2a371628891de78cc8dda2.tar.gz rockbox-b130b507349952cbab2a371628891de78cc8dda2.zip | |
Add jz4760 tool
This tool can pack/unpack a jz4760 archive (like the one used for the fiio
x1/x3/x5), and can descramble/scramble (it's the same operation) a firmware
file (the sys.bin file in the archive). I did my best to keep the compatibility
with the leaked Fiio/Ingenic tool which has the same name.
I wrote the tools from scratch, but here are some remarks:
- the format used is a slightly modified IHFS used in the older JZ4640 series,
I used the information on the wiki about the IHFS format
- the CRC computation done was already reversed engineered by someone on the
forums but I realised this later
- There are a few unknown fields in the headers, see comments in the source code
- The firmware scrambling was discovered by pure guess, I realised there were
some repetitve sequences, some I guessed it was a rotative XOR and ran some
analysis to find the most probable sequence
Change-Id: Ib83735b3db8475be5de9c94231714e88668a0340
Diffstat (limited to 'apps/playlist_viewer.c')
0 files changed, 0 insertions, 0 deletions