[Qce-ga-devel] Re: Quickcam Messenger source somewhere ?

[Anthony W. <ant...@nt...>]

Hello

A couple of months ago I messed up and bought the "wrong" type of 
Quickcam :-(
I have downloaded the latest CVS qc-usb source.
I have a Messenger (0x046D / 0x08F0) cam and I am willing to do the 
basics to get the data stream and decode if I can.
I have RH9 running an OpenMosix 2.4.22 kernel but I can use any 2.4 
kernel if that would be better.
I have not yet started running the 2.6 kernel and would prefer to not 
switch yet as it usually takes several days recompiling dirvers and 
applications to get it all working agian.

There is a message from f.f...@ie... on the 01/08/03 13:59 in 
gmane.linux.drivers.quickcam.general which says

I was able only to do a silly hack on the qce-ga-0.40d driver to make it
knowing the device and registering itself as the right driver for the
device (under the hotplugging method), but I simply can't do anything
useful with this.

is this possibly the code that Albert Tumanov is thinking of ?

ha...@te... on the 05/09/03 10:27 in 
gmane.linux.drivers.quickcam.general wrote

I was experimenting around with the raw data mentioned earlier in the
list. I get something like a round shape out of them (taking away an
additional header and debayerize it). To know if it is something
"visible" or just data-noise I would like to ask if somebody can get raw
frames from the cam + the image. Preferably something like a
grid with thick lines.

Please could you explain what method you used to decode the data (for a 
video newbie) or point me to a source code reference point ?

Is there any open source libs I could use as example routines for the 
video decryption (as well as the qc-usb source :-) ?

I have the white paper from STC (chip manufacture ?) regarding the 
single chip cam design theory and was going to see if that gave any clues.

In some of the other emails various registers are mentioned and I was 
going to try to reuse those values.

Should I compose a list of register / values that I am planning on setting ?

I have spent a couple of evenings trying to get USB Snoop to work with 
W2K and XP but I must be doing something wrong as I can not capture any 
data on either system so I decided working directly on the driver would 
be most efficient way to move forward.

I was also going to look at the other quickcam drivers to see if any of 
those algorithms helped any (I know its a long shot but you never know).

I do have 10+ years of programming experience but not Linux device 
drivers or video processing.
I have however worked writing SCADA software, PLC compilers, embeded 
software, etc so I am reasonably hardware oriented.

Tuukka Toivonen I notice in the source code there is {{{ [fold] markers.
Which tool / emacs lisp script generates and uses this info ?

I am sorry for not spending more time reading up on the video aspects 
but I am hoping to spend that time decrypting the video stream.
Please take this as a genuine offer of help not just more hot air.
Help me to help you.

TTFN Tony

- How many MS engineers does it take to change a light bulb?
- None, they just define darkness as the industry standard.


Tuukka Toivonen wrote:
> On Thu, 6 Nov 2003, Albert Tumanov wrote:
> 
> 
>>is it just me or I saw somewhere modified qce-ga source with initial
>>support for Quickcam Messenger ?
> 
> 
> I don't think so... some people have been worked with Messenger support,
> but AFAIK there aren't any version of the driver with any kind of Messenger
> support.
> 
> Definitely nobody has usable support for Messenger, anyway.
> It's possible to read some data from it but not known how to decode
> image from that data.
> 
> 
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