[linux-dvb] DVB-S2 / Multiproto and future modulation support

Steven Toth stoth at linuxtv.org
Sat Aug 30 19:29:10 CEST 2008

Nicolas Will wrote:
> On Fri, 2008-08-29 at 14:29 -0400, Steven Toth wrote:
>> Regarding the multiproto situation:
>> A number of developers, maintainers and users are unhappy with the
>> multiproto situation, actually they've been unhappy for a considerable
>> amount of time. The linuxtv developer community (to some degree) is seen
>> as a joke and a bunch in-fighting people. Multiproto is a great
>> demonstration of this. [1] The multiproto project has gone too far, for
>> too long and no longer has any credibility in the eyes of many people.
>> In response, a number developers have agreed that "enough is enough" and
>> "it's time to take a new direction", for these developers the technical,
>> political and personal cost of multiproto is too high. These developers
>> have decided to make an announcement.
>> Mauro Chehab, Michael Krufky, Patrick Boettcher and myself are hereby
>> announcing that we no longer support multiproto and are forming a
>> smaller dedicated project group which is focusing on adding next
>> generation S2/ISDB-T/DVB-H/DVB-T2/DVB-SH support to the kernel through a 
>> different and simpler API.
>> Basic patches and demo code for this API is currently available here.
>> http://www.steventoth.net/linux/s2
>> Does it even work? Yes
>> Is this new API complete? No
>> Is it perfect? No, we've already had feedback on structural and
>> namingspace changes that people would like to see.
>> Does it have bugs? Of course, we have a list of things we already know
>> we want to fix.
>> but ...
>> Is the new approach flexible? Yes, we're moving away from passing fixed
>> modulation structures into the kernel.
>> Can we add to it without breaking the future ABI when unforseen
>> modulations types occur? Yes
>> Does it preserve backwards compatibility? Yes
>> Importantly, is the overall direction correct? Yes
>> Does it impact existing frontend drivers? No.
>> What's the impact to dvb-core? Small.
>> What's the impact to application developers? None, unless an application 
>> developer wants to support the new standards - binary compatibility!
>> We want feedback and we want progress, we aim to achieve it.
>> Importantly, this project group seeks your support.
>> If you also feel frustrated by the multiproto situation and agree in
>> principle with this new approach, and the overall direction of the API
>> changes, then we welcome you and ask you to help us.
>> Growing the list of supporting names by 100%, and allowing us to publish
>> your name on the public mailing list, would show the non-maintainer
>> development community that we recognize the problem and we're taking
>> steps to correct the problem. We want to make LinuxTV a perfect platform
>> for S2, ISDB-T and other advanced modulation types, without using the
>> multiproto patches.
>> We're not asking you for technical help, although we'd like that  :) ,
>> we're just asking for your encouragement to move away from multiproto.
>> If you feel that you want to support our movement then please help us by
>> acking this email.
>> Regards - Steve, Mike, Patrick and Mauro.
>> Acked-by: Patrick Boettcher <pb at linuxtv.org>
>> Acked-by: Michael Krufky <mkrufky at linuxtv.org>
>> Acked-by: Steven Toth <stoth at linuxtv.org>
>> Acked-by: Mauro Carvalho Chehab <mchehab at infradead.org>
> Acked-by: Nicolas Will <nico at youplala.net>
> I can't review code or provide any, but I have a server if needed.

Nico, understood. Thats for the offer.

> DVB-S2 and DVB-T2 (when it arrrives) are of interst to me.

... and many other people.

Thanks for your support.



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