From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]:8418 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752392Ab3AARwW (ORCPT ); Tue, 1 Jan 2013 12:52:22 -0500 Date: Tue, 1 Jan 2013 15:29:32 -0200 From: Mauro Carvalho Chehab To: Manu Abraham Cc: Devin Heitmueller , Linux Media Mailing List , Klaus Schmidinger Subject: Re: [PATCH RFCv3] dvb: Add DVBv5 properties for quality parameters Message-ID: <20130101152932.3873d4cc@redhat.com> In-Reply-To: References: <1356739006-22111-1-git-send-email-mchehab@redhat.com> <20130101130041.52dee65f@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: Em Tue, 1 Jan 2013 22:18:49 +0530 Manu Abraham escreveu: > On Tue, Jan 1, 2013 at 8:30 PM, Mauro Carvalho Chehab > wrote: > > > [RFCv4] dvb: Add DVBv5 properties for quality parameters > > > > The DVBv3 quality parameters are limited on several ways: > > - Doesn't provide any way to indicate the used measure; > > - Userspace need to guess how to calculate the measure; > > - Only a limited set of stats are supported; > > - Doesn't provide QoS measure for the OFDM TPS/TMCC > > carriers, used to detect the network parameters for > > DVB-T/ISDB-T; > > - Can't be called in a way to require them to be filled > > all at once (atomic reads from the hardware), with may > > cause troubles on interpreting them on userspace; > > - On some OFDM delivery systems, the carriers can be > > independently modulated, having different properties. > > Currently, there's no way to report per-layer stats; > > per layer stats is a mythical bird, nothing of that sort does exist. Had you ever read or tried to get stats from an ISDB-T demod? If you had, you would see that it only provides per-layer stats. Btw, this is a requirement to follow the ARIB and ABNT ISDB specs. Cheers, Mauro