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V4L AFC Information

В Втр, 28/03/2006 в 13:07 +0000, Sandipan пишет:
> Dear All,
> 
>    I am using V4L for writing a tuning code. I want to search the 
> transmitters using V4L. For deteting "afc window" I am using "afc" 
> member of the structure "v4l2_tuner" used in ioctl VIDIOC_G_TUNER. 
> But I always get the afc value as ZERO irrespective of whether 
> there is sync(transmitter) or not. The sync(from member "signal") 
> is coming properly -> 0 for no transmitter; 65535 for 
> transmitter.
>   I am using the FileDescriptor assigned to /dev/video0.
> My Hardware is Hauppauge's WinTv.
>    Can any one please help me by providing feedback as to why I am 
> always getting afc as 0 (Zero)?
>   Any information will be appreciated. Thanks in advance.
> 
> Warm Regards,
> Sandipan.
> 

That just means that this feature is not implemented in the driver,
either bttv or cx88 (Hauppauge's WinTV may use different chips). Feel
free to find corresponding place in a v4l-dvb driver and submit a patch.

Moreover Hauppauge is always open to hardware questions.

You should look at tuner-simple.c file in v4l-dvb and on tda9887 file if
your card has tda9887. Btw, as I see afc assignment is implemented in
tda9887 but only for radio. Grep for VIDIOC_G_TUNER to find exact place.


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