On 2000.12.27 01:32:20 +0100 Olive Tao wrote:
> Hi ,
>
>
> I am new to Linux world and need to complete a decoder class of V4L
> driver
> in short time. I can not find step by step information regarding how to
> debug a modular driver under Linux.
>
> Can anyone help to let me know how to debug a device driver in Linux
> environment such as V4L driver.
Having 2/3 of a picture and no color is very characteristic for pal/ntsc
mixups, I don't think you have to debug the v4l driver since you have
captured jpegs with the right settings yourself.
I think you should look at the capture code of streamer and see if the norm
settings are handled the right way.
This is done with the VIDIOCGCHAN and VIDIOCSCHAN ioctls.
I think it will be the easiest to compare the calls to this ioctl of
streamer with the program that you used for the jpeg capture.
Jeroen
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