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37550226d8
This patch introduces the avtpsink elements which implements a typical network sink. Implementation is pretty straightforward since the burden is implemented by GstBaseSink class. The avtpsink element defines three new properties: 1) network interface from where AVTPDU should be transmitted, 2) destination MAC address (usually a multicast address), and 3) socket priority (SO_PRIORITY). Socket setup and teardown are done in start/stop virtual methods while AVTPDU transmission is carried out by render(). AVTPDUs are encapsulated into Ethernet frames and transmitted to the network via AF_PACKET socket domain. Linux requires CAP_NET_RAW capability in order to open an AF_PACKET socket so the application that utilize this element must have it. For further info about AF_PACKET socket domain see packet(7). Finally, AVTPDUs are expected to be transmitted at specific times - according to the GstBuffer presentation timestamp - so the 'sync' property from GstBaseSink is set to TRUE by default.
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/*
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* GStreamer AVTP Plugin
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* Copyright (C) 2019 Intel Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later
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* version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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/**
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* plugin-avtp:
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*
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* ## Audio Video Transport Protocol (AVTP) Plugin
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*
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* The AVTP plugin implements typical Talker and Listener functionalities that
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* can be leveraged by GStreamer-based applications in order to implement TSN
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* audio/video applications.
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*
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* ### Dependencies
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*
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* The plugin uses libavtp to handle AVTP packetization. Libavtp source code can
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* be found in https://github.com/AVnu/libavtp as well as instructions to build
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* and install it.
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*
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* If libavtp isn't detected by configure, the plugin isn't built.
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*
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* ### The application/x-avtp mime type
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*
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* For valid AVTPDUs encapsulated in GstBuffers, we use the caps with mime type
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* application/x-avtp.
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*
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* AVTP mime type is pretty simple and has no fields.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <gst/gst.h>
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#include "gstavtpaafdepay.h"
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#include "gstavtpaafpay.h"
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#include "gstavtpsink.h"
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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if (!gst_avtp_aaf_pay_plugin_init (plugin))
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return FALSE;
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if (!gst_avtp_aaf_depay_plugin_init (plugin))
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return FALSE;
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if (!gst_avtp_sink_plugin_init (plugin))
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return FALSE;
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return TRUE;
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
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avtp, "Audio/Video Transport Protocol (AVTP) plugin",
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plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
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