Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751047AbaLOV1m (ORCPT ); Mon, 15 Dec 2014 16:27:42 -0500 Received: from mail-ob0-f170.google.com ([209.85.214.170]:52912 "EHLO mail-ob0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750778AbaLOV1k convert rfc822-to-8bit (ORCPT ); Mon, 15 Dec 2014 16:27:40 -0500 MIME-Version: 1.0 In-Reply-To: <548F2DD6.70805@collabora.com> References: <548F272E.3040808@gmail.com> <548F2DD6.70805@collabora.com> From: Jean-Michel Hautbois Date: Mon, 15 Dec 2014 22:27:24 +0100 X-Google-Sender-Auth: bP7t8DyhRwha0feXluFZS0vKGmY Message-ID: Subject: Re: i.MX6 CSC and scaler To: Nicolas Dufresne Cc: Steve Longerbeam , Philipp Zabel , linux-kernel , =?UTF-8?B?RnLDqWTDqXJpYyBTdXJlYXU=?= , Fabio Estevam Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2014-12-15 19:52 GMT+01:00 Nicolas Dufresne : > > > Le 12/15/2014 01:23 PM, Steve Longerbeam a écrit : >> You would need to write a gstreamer plugin to make use of the >> mem2mem device for h/w CSC and scaling. Thank you Steve, this is of a great help ! > There is an element already (v4l2transform), though it currently only > handle color conversion. I'd like to see scaling in that too instead of > having a separate element that only do scaling like: > > https://bugzilla.gnome.org/show_bug.cgi?id=726104 Nice idea. You are probably right Nicolas, it would make sense to be able to scale and convert color in the same element. > I think Michael and Philipp idea was that scaling could be done directly > out of the decoder, something supported by CODA driver. There is some > work require to get that in GStreamer, see: > > https://bugzilla.gnome.org/show_bug.cgi?id=733827 (pixel format nego) > https://bugzilla.gnome.org/show_bug.cgi?id=733828 (display size nego) There is a need for a separate element too. So it could be handled in front of the encoder if needed, on decoder output if needed, but should be a single element too, instanciable multiple times if multiple inputs/outputs are needed. JM -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/