From patchwork Fri Sep 1 19:37:47 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 9935201 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CCEC9603B4 for ; Fri, 1 Sep 2017 19:42:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BD11127FAE for ; Fri, 1 Sep 2017 19:42:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B18B8281D2; Fri, 1 Sep 2017 19:42:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F0C05281B7 for ; Fri, 1 Sep 2017 19:42:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752696AbdIATlN (ORCPT ); Fri, 1 Sep 2017 15:41:13 -0400 Received: from ec2-52-27-115-49.us-west-2.compute.amazonaws.com ([52.27.115.49]:48367 "EHLO osg.samsung.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752317AbdIATiA (ORCPT ); Fri, 1 Sep 2017 15:38:00 -0400 Received: from localhost (localhost [127.0.0.1]) by osg.samsung.com (Postfix) with ESMTP id A4600A0D5A; Fri, 1 Sep 2017 19:38:27 +0000 (UTC) X-Virus-Scanned: amavisd-new at osg.samsung.com X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" Received: from osg.samsung.com ([127.0.0.1]) by localhost (s-opensource.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5QyXHa0Ktvuk; Fri, 1 Sep 2017 19:38:27 +0000 (UTC) Received: from smtp.s-opensource.com (unknown [189.61.49.22]) by osg.samsung.com (Postfix) with ESMTPSA id 02F0CA0D5D; Fri, 1 Sep 2017 19:38:25 +0000 (UTC) Received: from mchehab by smtp.s-opensource.com with local (Exim 4.89) (envelope-from ) id 1dnrlH-0003hM-EY; Fri, 01 Sep 2017 16:37:51 -0300 From: Mauro Carvalho Chehab To: Linux Doc Mailing List , Linux Media Mailing List Cc: Mauro Carvalho Chehab , Mauro Carvalho Chehab , linux-kernel@vger.kernel.org, Jonathan Corbet Subject: [PATCH 11/14] media: dmx-get-pes-pids.rst: document the ioctl Date: Fri, 1 Sep 2017 16:37:47 -0300 Message-Id: X-Mailer: git-send-email 2.13.5 In-Reply-To: References: In-Reply-To: References: Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This ioctl is supported by the DVB core, but was never documented. Add a documentation for it. Signed-off-by: Mauro Carvalho Chehab --- Documentation/media/uapi/dvb/dmx-get-pes-pids.rst | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst b/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst index 20288c11d279..fbdbc12869d1 100644 --- a/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst +++ b/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst @@ -25,13 +25,31 @@ Arguments File descriptor returned by :c:func:`open() `. ``pids`` - Undocumented. + Array used to store 5 Program IDs. Description ----------- -.. note:: This ioctl is undocumented. Documentation is welcome. +This ioctl allows to query a DVB device to return the first PID used +by audio, video, textext, subtitle and PCR programs on a given service. +They're stored as: + +======================= ======== ======================================= +PID element position content +======================= ======== ======================================= +pids[DMX_PES_AUDIO] 0 first audio PID +pids[DMX_PES_VIDEO] 1 first video PID +pids[DMX_PES_TELETEXT] 2 first teletext PID +pids[DMX_PES_SUBTITLE] 3 first subtitle PID +pids[DMX_PES_PCR] 4 first Program Clock Reference PID +======================= ======== ======================================= + + +.. note:: + + A value equal to 0xffff means that the PID was not filled by the + Kernel. Return Value