Re: Can I expect in-kernel decoding to work out of box?

[Mauro Carvalho Chehab <mchehab@redhat.com>]

Em 28-07-2010 15:05, Jarod Wilson escreveu:
> On Wed, Jul 28, 2010 at 03:08:13PM -0300, Mauro Carvalho Chehab wrote:
>> Em 28-07-2010 14:04, Jon Smirl escreveu:
>>> On Wed, Jul 28, 2010 at 11:56 AM, Mauro Carvalho Chehab
>>> <mchehab@redhat.com> wrote:
>>>> Em 28-07-2010 11:41, Jon Smirl escreveu:
>>>>
>>>>> It's possible to build a Linux IR decoder engine that can be loaded
>>>>> with the old LIRC config files.
>>>>
>>>> I think it is a good idea to have a decoder that works with such files anyway.
>>>
>>> The recorder should use the Linux IR system to record the data. It
>>> would confusing to mix the systems. Users need to be really sure that
>>> the standard protocol decoders don't understand their protocol before
>>> resorting to this. Any one in this situation should post their
>>> recorded data so we can check for driver implementation errors.
>>>
>>> An example: if you use irrecord on Sony remotes lirc always records
>>> them in raw mode. The true problem here is that irrecord doesn't
>>> understand that Sony remotes mix different flavors of the Sony
>>> protocol on a single remote. This leads you to think that the Sony
>>> protocol engine is broken when it really isn't. It's the irrecord tool
>>> that is broken.  The kernel IR system will decode these remotes
>>> correctly without resorting to raw mode.
>>
>> A decoder like that should be a last-resort decoder, only in the
>> cases where there's no other option.
>>
>>>> There are some good reasons for that, as it would allow in-kernel support for
>>>> protocols that may have some patent restrictions on a few countries that allow
>>>> patents on software.
>>>
>>> Are there any IR protocols less than 20 (or 17) years old?
>>
>> Yes. This protocol is brand new:
>> 	https://www.smkusa.com/usa/technologies/qp/
>>
>> And several new devices are starting to accept it.
> 
> The US patent appears to have been filed in 1995 and granted in 1997, so
> "brand new" is relative. ;)

Yes, I saw the patent timestamps too ;) Yet, AFAIK, they're starting to use this protocol
on newer IR devices, so, we'll probably see some new devices using it.
> 
> http://www.freepatentsonline.com/5640160.html
> 
> We do have a few more years of being encumbered by it here in the US
> though. :(
> 

:(

Cheers,
Mauro.