Re: Topro 6800 driver [JPEG decoding solved]

[Thomas Kaiser <v4l@kaiser-linux.li>]

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Hello Anders

Good news, I could decode a frame which I extracted from the usbsnoobs I 
did :-). See attached picture frame3-03.jpg. It uses the quality 0.

Your black frame you sent me gets now correctly decode, too (frameA-01.jpg)

I found the Huffman table in the Windoz driver file (TP6810.sys) at 
offset 0x2a59c. The QTable which I found in a text file on my Windoz box 
can be found in this driver file, also.

I attached some binary files which I used to build the 2 attached jpeg.

For example use:
cat FFD8-Q0-320x240.bin huffman1.bin FFDA.bin frame3-3.bin >frame3-03.jpg
to make the picture frame3-03.jpg.

This information should the cam get going in Linux ;-)

Happy Hacking,

Thomas

PS: I sent this to the linux-media mail list, because somebody else is 
interested about this information, too.


[-- Attachment #2: frame3-03.jpg --]
[-- Type: image/jpeg, Size: 11452 bytes --]

[-- Attachment #3: frameA-01.jpg --]
[-- Type: image/jpeg, Size: 5952 bytes --]

[-- Attachment #4: FFD8-Q0-320x240.bin --]
[-- Type: application/octet-stream, Size: 160 bytes --]

[-- Attachment #5: FFD8-Q0-640x480.bin --]
[-- Type: application/octet-stream, Size: 160 bytes --]

[-- Attachment #6: FFD8-Q1-320x280.bin --]
[-- Type: application/octet-stream, Size: 160 bytes --]

[-- Attachment #7: FFD8-Q1-640x480.bin --]
[-- Type: application/octet-stream, Size: 160 bytes --]

[-- Attachment #8: FFDA.bin --]
[-- Type: application/octet-stream, Size: 14 bytes --]

[-- Attachment #9: huffman1.bin --]
[-- Type: application/octet-stream, Size: 352 bytes --]

[-- Attachment #10: frame3-3.bin --]
[-- Type: application/octet-stream, Size: 10926 bytes --]