[ADD-ON] DAX Mod Final For DevHook v0.46

[Gray-Fox]

Uncle Jam rilascia la versione finale di questo add-on per Devhook v0.46 che permette al programma realizzato da Booster, di riconoscere ed eseguire ISO compresse nel formato .DAX.

DAX Mod Final + SRC For DevHook v0.46 For PSP
// Dax support plugin for Devhook 0.46 //
Author : Uncle Jam
Credits : Booster for Devhook 0.46, Dark Alex for DAX format, Thoffir and others for testing

Hi guys,

Find here the final version of the DAX Plugin. Changes since BETA 3, CSO optimization has been removed. Speed improvment was not obvious at the end and there were compability issues.

Thanks to everyone.

Uncle Jam.

Howto
=====
Drop the binary file umdciso.prx in [MS-ROOT]/dh/kd and replace the existing one.
Devhook_046_DAX_Plugin_v1.0.0_source.tar.gz is the source code.
Devhook_046_DAX_Plugin_v1.0.0_source.patch.tar.gz is the patch for Booster official DevHook 0.46 source code.

Note that it will work only with a plain original Devhook 0.46 release

General information
===================
No known bug since BETA 1 . Just limitations and some fine tuning of heap size and thread priority.

Limitations are:
- zlib consumes quite a lot of memory, making troubles with some games such as PES 5. FIFA 2007 also has been reported as non-working with zlib.
- zlib code is quite heavy, that's why the binary is about 40kb!

Tuning is :
- heap size set to 16kb, more or less the lower working value
- thread prority trick has been removed as generating crashes with games such as Dragon Ball Z Budokai
- cache size of 0x2000 has been disabled for CSO as not helping IMHO
- zlib has been disabled for CSO as source of too many problems of incompability. Speed improvment was not that obvious at the end.

Some comments on my work:
- zlib is a great general purpose compression library but the code is too big, the memory footprint is too big and the decompression schema is not fast enough for realtime. So there is no way searching this path in my opinion, this is a dead-end.
- DAX format was a good first attempt to make compressed iso. However, the format itself is not optimized, with redundant indexes (offsets and lengths), the non-compressed index is not really efficient also. DAX files are smaller as using frame size of 8192 bytes instead of the ISO standard of 2048 bytes. Good for compression, bad for speed... CSO is definitely a better format. And there is still place for improvment...

Release Notes
=============

Release 0.1.0
-------------
DAX : First beta working release
Released as beta 1

Release 0.2.0
-------------
DAX : Heap size fix for Virtua Tennis

Release 0.3.0
-------------
DAX : Index buffer improvment

Release 0.3.1
-------------
DAX : Thread priority fix for Dragon Ball Z Budokai
CSO : Same fix
Released as beta 2

Release 0.4.0
-------------
CSO : speed optimization thanks to zlib
Released as beta 3

Release 1.0.0
-------------
DAX : Unchanged
CSO : Removed zlib as causing regression
Released as final

Licence
=======

There is NO. Feel free to do whatever you want with the code. However, I think that everybody should make their source code public but it's up to you.

-Uncle Jam