Re: [RFC 1/1] v4l2_extension: helper daemon commands passing

[Thierry Merle <thierry.merle@free.fr>]

Laurent Pinchart a écrit :
> On Monday 03 March 2008, Thierry Merle wrote:
>   
>> Jiri Slaby a écrit :
>>     
>>> Here I would like to know if the the commands passing interface to the
>>> helper daemon introduced in this patch is OK, or alternatively propose
>>> some other idea ;).
>>>       
>> I have committed your patch as is
>> http://linuxtv.org/hg/~tmerle/v4l2_extension/
>> Now will begin a driver enhancement. I will do that on usbvision because
>> I know it.
>> The first step will be to extend the supported video formats (2
>> sub-steps: 1-just enable hardware pixel format capabilities in
>> usbvision, 2-allow the helper daemon to extend usbvision pixel format
>> capabilities).
>>     
>
> I haven't followed v4l2_extension development closely, so I'm a bit puzzled by 
> this. Are the modifications you made to the usbvision module for testing 
> purpose only ? My understanding of v4l2_extension is that it should work 
> completely transparently and must not require any change to v4l2 drivers.
>
>   
In fact I meant remove from usbvision the software decompression
algorithm in order to put it in the helper daemon.
I will restrict the list of supported pixel formats to the ones that the
hardware can output without software decompression.
I hope that the sole modification for a standard base driver will be the
add of v4l2ext_register/v4l2ext_unregister calls.
> Best regards,
>
> Laurent Pinchart
>
>   
Cheers,
Thierry

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