Re: PAC7302 disassembly

[Thomas Kaiser <linux-dvb@kaiser-linux.li>]

Thomas Kaiser wrote:
> christopherwanderson@columbus.rr.com wrote:
>> Can I get as much disassembly of the PAC7302 drivers with your 
>> comments next to it? I am trying to improve my webcam and currently 
>> disassembling the driver, in Vista64 with IDA Pro. (I still have the 
>> 32 bit driver files as I upgraded from xp32) I am helping on the 
>> gAIM/Pidgin voice/video chat and this driver isn't where I  would like 
>> it to be. I need better color balance, even after changing alot of 
>> options I still turn out orange quite a bit. I have Assembly 
>> expierence, I own the Intel Instruction Manuals, so figuring out the 
>> actual given driver with a little bit of help based on the current 
>> progress should not be difficult Christopher W. Anderson --
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> 
> Hello Christopher
> 
> Thanks for posting to linux-media@vger.kernel.org.
> 
> As I wrote you back on the private mail you send me, I don't really 
> understand what you try to tell or ask me!
> 
> What do you mean with "disassembly"? Converting the binary Windoz drive 
> to assemble code? Or looking with a hex editor into the Windowz driver 
> and figure out what the opcode is doing?
> 
> The PAC7302 Linux driver was develop by re-engineering the Windoz drive 
> with the help of usb snoop. Usb snoop 
> (http://benoit.papillault.free.fr/usbsnoop/) is a program which can log 
> the usb traffic on a Windoz box. By looking at this logs, I could figure 
> out how to control the cam (PAC7302 bridge). To find out the compression 
> Pixart is using in this chip was a long journey, too.
> 
> I suggest you get the newest driver from linuxtv.org or from
> Jean-Francois Moine site (http://moinejf.free.fr/).
> 
> Don't forget to get the newest libv4l lib from Hans de Geode. After you 
> installed this and tested the webcam, please report back how the driver 
> is working.
> 
> Anyway, when you are able to disassemble the Windowz drive, please post 
> your results here. There are some people around here how can comment 
> your outcome.
> 
> Thomas
> 
> -- 
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Sorry for replying to my own post.

I forgot to tell that there is no documentation available from Pixart. I 
tried to meet them (Pixart) the last time I was in Taiwan but they 
refused to meet me :-( (Looks like they are not interested to have there 
products running with Linux)

Thomas