mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
They are very confusing for people, and more often than not also just not very accurate. Seeing 'last reviewed: 2005' in your docs is not very confidence-inspiring. Let's just remove those comments.
1194 lines
36 KiB
C
1194 lines
36 KiB
C
/* GStreamer
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* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
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* Copyright (C) <2005> Nokia Corporation <kai.vehmanen@nokia.com>
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* Copyright (C) <2012> Collabora Ltd.
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* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
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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 Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library 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 St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-udpsrc
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* @see_also: udpsink, multifdsink
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*
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* udpsrc is a network source that reads UDP packets from the network.
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* It can be combined with RTP depayloaders to implement RTP streaming.
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*
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* The udpsrc element supports automatic port allocation by setting the
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* #GstUDPSrc:port property to 0. After setting the udpsrc to PAUSED, the
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* allocated port can be obtained by reading the port property.
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*
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* udpsrc can read from multicast groups by setting the #GstUDPSrc:multicast-group
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* property to the IP address of the multicast group.
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*
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* Alternatively one can provide a custom socket to udpsrc with the #GstUDPSrc:sockfd
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* property, udpsrc will then not allocate a socket itself but use the provided
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* one.
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*
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* The #GstUDPSrc:caps property is mainly used to give a type to the UDP packet
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* so that they can be autoplugged in GStreamer pipelines. This is very usefull
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* for RTP implementations where the contents of the UDP packets is transfered
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* out-of-bounds using SDP or other means.
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*
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* The #GstUDPSrc:buffer-size property is used to change the default kernel
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* buffersizes used for receiving packets. The buffer size may be increased for
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* high-volume connections, or may be decreased to limit the possible backlog of
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* incoming data. The system places an absolute limit on these values, on Linux,
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* for example, the default buffer size is typically 50K and can be increased to
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* maximally 100K.
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*
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* The #GstUDPSrc:skip-first-bytes property is used to strip off an arbitrary
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* number of bytes from the start of the raw udp packet and can be used to strip
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* off proprietary header, for example.
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*
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* The udpsrc is always a live source. It does however not provide a #GstClock,
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* this is left for upstream elements such as an RTP session manager or demuxer
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* (such as an MPEG demuxer). As with all live sources, the captured buffers
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* will have their timestamp set to the current running time of the pipeline.
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*
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* udpsrc implements a #GstURIHandler interface that handles udp://host:port
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* type URIs.
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*
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* If the #GstUDPSrc:timeout property is set to a value bigger than 0, udpsrc
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* will generate an element message named
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* <classname>"GstUDPSrcTimeout"</classname>
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* if no data was recieved in the given timeout.
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* The message's structure contains one field:
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* <itemizedlist>
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* <listitem>
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* <para>
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* #guint64
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* <classname>"timeout"</classname>: the timeout in microseconds that
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* expired when waiting for data.
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* </para>
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* </listitem>
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* </itemizedlist>
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* The message is typically used to detect that no UDP arrives in the receiver
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* because it is blocked by a firewall.
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*
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* A custom file descriptor can be configured with the
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* #GstUDPSrc:sockfd property. The socket will be closed when setting the
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* element to READY by default. This behaviour can be
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* overriden with the #GstUDPSrc:closefd property, in which case the application
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* is responsible for closing the file descriptor.
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*
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch-1.0 -v udpsrc ! fakesink dump=1
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* ]| A pipeline to read from the default port and dump the udp packets.
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* To actually generate udp packets on the default port one can use the
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* udpsink element. When running the following pipeline in another terminal, the
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* above mentioned pipeline should dump data packets to the console.
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* |[
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* gst-launch-1.0 -v audiotestsrc ! udpsink
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* ]|
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* |[
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* gst-launch-1.0 -v udpsrc port=0 ! fakesink
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* ]| read udp packets from a free port.
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* </refsect2>
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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 "gstudpsrc.h"
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#include <gst/net/gstnetaddressmeta.h>
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#if GLIB_CHECK_VERSION (2, 35, 7)
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#include <gio/gnetworking.h>
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#else
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/* nicked from gnetworking.h */
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#ifdef G_OS_WIN32
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#ifndef _WIN32_WINNT
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#define _WIN32_WINNT 0x0501
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#endif
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#include <winsock2.h>
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#undef interface
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#include <ws2tcpip.h> /* for socklen_t */
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#endif /* G_OS_WIN32 */
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#endif
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/* not 100% correct, but a good upper bound for memory allocation purposes */
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#define MAX_IPV4_UDP_PACKET_SIZE (65536 - 8)
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GST_DEBUG_CATEGORY_STATIC (udpsrc_debug);
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#define GST_CAT_DEFAULT (udpsrc_debug)
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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#define UDP_DEFAULT_PORT 5004
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#define UDP_DEFAULT_MULTICAST_GROUP "0.0.0.0"
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#define UDP_DEFAULT_MULTICAST_IFACE NULL
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#define UDP_DEFAULT_URI "udp://"UDP_DEFAULT_MULTICAST_GROUP":"G_STRINGIFY(UDP_DEFAULT_PORT)
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#define UDP_DEFAULT_CAPS NULL
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#define UDP_DEFAULT_SOCKET NULL
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#define UDP_DEFAULT_BUFFER_SIZE 0
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#define UDP_DEFAULT_TIMEOUT 0
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#define UDP_DEFAULT_SKIP_FIRST_BYTES 0
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#define UDP_DEFAULT_CLOSE_SOCKET TRUE
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#define UDP_DEFAULT_USED_SOCKET NULL
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#define UDP_DEFAULT_AUTO_MULTICAST TRUE
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#define UDP_DEFAULT_REUSE TRUE
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enum
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{
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PROP_0,
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PROP_PORT,
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PROP_MULTICAST_GROUP,
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PROP_MULTICAST_IFACE,
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PROP_URI,
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PROP_CAPS,
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PROP_SOCKET,
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PROP_BUFFER_SIZE,
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PROP_TIMEOUT,
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PROP_SKIP_FIRST_BYTES,
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PROP_CLOSE_SOCKET,
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PROP_USED_SOCKET,
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PROP_AUTO_MULTICAST,
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PROP_REUSE,
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PROP_ADDRESS,
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PROP_LAST
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};
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static void gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data);
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static GstCaps *gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter);
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static GstFlowReturn gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf);
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static gboolean gst_udpsrc_close (GstUDPSrc * src);
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static gboolean gst_udpsrc_unlock (GstBaseSrc * bsrc);
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static gboolean gst_udpsrc_unlock_stop (GstBaseSrc * bsrc);
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static void gst_udpsrc_finalize (GObject * object);
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static void gst_udpsrc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_udpsrc_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn gst_udpsrc_change_state (GstElement * element,
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GstStateChange transition);
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#define gst_udpsrc_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstUDPSrc, gst_udpsrc, GST_TYPE_PUSH_SRC,
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G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_udpsrc_uri_handler_init));
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static void
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gst_udpsrc_class_init (GstUDPSrcClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseSrcClass *gstbasesrc_class;
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GstPushSrcClass *gstpushsrc_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstbasesrc_class = (GstBaseSrcClass *) klass;
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gstpushsrc_class = (GstPushSrcClass *) klass;
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GST_DEBUG_CATEGORY_INIT (udpsrc_debug, "udpsrc", 0, "UDP src");
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gobject_class->set_property = gst_udpsrc_set_property;
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gobject_class->get_property = gst_udpsrc_get_property;
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gobject_class->finalize = gst_udpsrc_finalize;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
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g_param_spec_int ("port", "Port",
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"The port to receive the packets from, 0=allocate", 0, G_MAXUINT16,
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UDP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/* FIXME 2.0: Remove multicast-group property */
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g_object_class_install_property (gobject_class, PROP_MULTICAST_GROUP,
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g_param_spec_string ("multicast-group", "Multicast Group",
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"The Address of multicast group to join. DEPRECATED: "
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"Use address property instead", UDP_DEFAULT_MULTICAST_GROUP,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_MULTICAST_IFACE,
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g_param_spec_string ("multicast-iface", "Multicast Interface",
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"The network interface on which to join the multicast group",
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UDP_DEFAULT_MULTICAST_IFACE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_URI,
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g_param_spec_string ("uri", "URI",
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"URI in the form of udp://multicast_group:port", UDP_DEFAULT_URI,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_CAPS,
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g_param_spec_boxed ("caps", "Caps",
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"The caps of the source pad", GST_TYPE_CAPS,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_SOCKET,
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g_param_spec_object ("socket", "Socket",
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"Socket to use for UDP reception. (NULL == allocate)",
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G_TYPE_SOCKET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE,
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g_param_spec_int ("buffer-size", "Buffer Size",
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"Size of the kernel receive buffer in bytes, 0=default", 0, G_MAXINT,
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UDP_DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT,
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g_param_spec_uint64 ("timeout", "Timeout",
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"Post a message after timeout nanoseconds (0 = disabled)", 0,
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G_MAXUINT64, UDP_DEFAULT_TIMEOUT,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass),
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PROP_SKIP_FIRST_BYTES, g_param_spec_int ("skip-first-bytes",
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"Skip first bytes", "number of bytes to skip for each udp packet", 0,
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G_MAXINT, UDP_DEFAULT_SKIP_FIRST_BYTES,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_CLOSE_SOCKET,
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g_param_spec_boolean ("close-socket", "Close socket",
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"Close socket if passed as property on state change",
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UDP_DEFAULT_CLOSE_SOCKET,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_USED_SOCKET,
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g_param_spec_object ("used-socket", "Socket Handle",
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"Socket currently in use for UDP reception. (NULL = no socket)",
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G_TYPE_SOCKET, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_AUTO_MULTICAST,
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g_param_spec_boolean ("auto-multicast", "Auto Multicast",
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"Automatically join/leave multicast groups",
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UDP_DEFAULT_AUTO_MULTICAST,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_REUSE,
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g_param_spec_boolean ("reuse", "Reuse", "Enable reuse of the port",
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UDP_DEFAULT_REUSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_ADDRESS,
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g_param_spec_string ("address", "Address",
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"Address to receive packets for. This is equivalent to the "
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"multicast-group property for now", UDP_DEFAULT_MULTICAST_GROUP,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_set_static_metadata (gstelement_class,
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"UDP packet receiver", "Source/Network",
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"Receive data over the network via UDP",
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"Wim Taymans <wim@fluendo.com>, "
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"Thijs Vermeir <thijs.vermeir@barco.com>");
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gstelement_class->change_state = gst_udpsrc_change_state;
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gstbasesrc_class->unlock = gst_udpsrc_unlock;
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gstbasesrc_class->unlock_stop = gst_udpsrc_unlock_stop;
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gstbasesrc_class->get_caps = gst_udpsrc_getcaps;
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gstpushsrc_class->create = gst_udpsrc_create;
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}
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static void
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gst_udpsrc_init (GstUDPSrc * udpsrc)
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{
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udpsrc->uri =
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g_strdup_printf ("udp://%s:%u", UDP_DEFAULT_MULTICAST_GROUP,
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UDP_DEFAULT_PORT);
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udpsrc->address = g_strdup (UDP_DEFAULT_MULTICAST_GROUP);
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udpsrc->port = UDP_DEFAULT_PORT;
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udpsrc->socket = UDP_DEFAULT_SOCKET;
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udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
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udpsrc->buffer_size = UDP_DEFAULT_BUFFER_SIZE;
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udpsrc->timeout = UDP_DEFAULT_TIMEOUT;
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udpsrc->skip_first_bytes = UDP_DEFAULT_SKIP_FIRST_BYTES;
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udpsrc->close_socket = UDP_DEFAULT_CLOSE_SOCKET;
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udpsrc->external_socket = (udpsrc->socket != NULL);
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udpsrc->auto_multicast = UDP_DEFAULT_AUTO_MULTICAST;
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udpsrc->used_socket = UDP_DEFAULT_USED_SOCKET;
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udpsrc->reuse = UDP_DEFAULT_REUSE;
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udpsrc->cancellable = g_cancellable_new ();
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/* configure basesrc to be a live source */
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gst_base_src_set_live (GST_BASE_SRC (udpsrc), TRUE);
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/* make basesrc output a segment in time */
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gst_base_src_set_format (GST_BASE_SRC (udpsrc), GST_FORMAT_TIME);
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/* make basesrc set timestamps on outgoing buffers based on the running_time
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* when they were captured */
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gst_base_src_set_do_timestamp (GST_BASE_SRC (udpsrc), TRUE);
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}
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static void
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gst_udpsrc_finalize (GObject * object)
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{
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GstUDPSrc *udpsrc;
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udpsrc = GST_UDPSRC (object);
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if (udpsrc->caps)
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gst_caps_unref (udpsrc->caps);
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udpsrc->caps = NULL;
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g_free (udpsrc->multi_iface);
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udpsrc->multi_iface = NULL;
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g_free (udpsrc->uri);
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udpsrc->uri = NULL;
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g_free (udpsrc->address);
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udpsrc->address = NULL;
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if (udpsrc->socket)
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g_object_unref (udpsrc->socket);
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udpsrc->socket = NULL;
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if (udpsrc->used_socket)
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g_object_unref (udpsrc->used_socket);
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udpsrc->used_socket = NULL;
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if (udpsrc->cancellable)
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g_object_unref (udpsrc->cancellable);
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udpsrc->cancellable = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static GstCaps *
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gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter)
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{
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GstUDPSrc *udpsrc;
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GstCaps *caps, *result;
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udpsrc = GST_UDPSRC (src);
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GST_OBJECT_LOCK (src);
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if ((caps = udpsrc->caps))
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gst_caps_ref (caps);
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GST_OBJECT_UNLOCK (src);
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if (caps) {
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if (filter) {
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result = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
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gst_caps_unref (caps);
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} else {
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result = caps;
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}
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} else {
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result = (filter) ? gst_caps_ref (filter) : gst_caps_new_any ();
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}
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return result;
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}
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static GstFlowReturn
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gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf)
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{
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GstFlowReturn ret;
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GstUDPSrc *udpsrc;
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GstBuffer *outbuf = NULL;
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GstMapInfo info;
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GSocketAddress *saddr = NULL;
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gsize offset;
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gssize readsize;
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gssize res;
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gboolean try_again;
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GError *err = NULL;
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udpsrc = GST_UDPSRC_CAST (psrc);
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retry:
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/* quick check, avoid going in select when we already have data */
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readsize = g_socket_get_available_bytes (udpsrc->used_socket);
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if (readsize > 0)
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goto no_select;
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do {
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gint64 timeout;
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try_again = FALSE;
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if (udpsrc->timeout)
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timeout = udpsrc->timeout / 1000;
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else
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timeout = -1;
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GST_LOG_OBJECT (udpsrc, "doing select, timeout %" G_GINT64_FORMAT, timeout);
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if (!g_socket_condition_timed_wait (udpsrc->used_socket, G_IO_IN | G_IO_PRI,
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timeout, udpsrc->cancellable, &err)) {
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if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_BUSY)
|
|
|| g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
|
|
goto stopped;
|
|
} else if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_TIMED_OUT)) {
|
|
g_clear_error (&err);
|
|
/* timeout, post element message */
|
|
gst_element_post_message (GST_ELEMENT_CAST (udpsrc),
|
|
gst_message_new_element (GST_OBJECT_CAST (udpsrc),
|
|
gst_structure_new ("GstUDPSrcTimeout",
|
|
"timeout", G_TYPE_UINT64, udpsrc->timeout, NULL)));
|
|
} else {
|
|
goto select_error;
|
|
}
|
|
|
|
try_again = TRUE;
|
|
}
|
|
} while (G_UNLIKELY (try_again));
|
|
|
|
/* ask how much is available for reading on the socket, this should be exactly
|
|
* one UDP packet. We will check the return value, though, because in some
|
|
* case it can return 0 and we don't want a 0 sized buffer. */
|
|
readsize = g_socket_get_available_bytes (udpsrc->used_socket);
|
|
if (G_UNLIKELY (readsize < 0))
|
|
goto get_available_error;
|
|
|
|
/* If we get here and the readsize is zero, then either select was woken up
|
|
* by activity that is not a read, or a poll error occurred, or a UDP packet
|
|
* was received that has no data. Since we cannot identify which case it is,
|
|
* we handle all of them. This could possibly lead to a UDP packet getting
|
|
* lost, but since UDP is not reliable, we can accept this. */
|
|
if (G_UNLIKELY (!readsize)) {
|
|
/* try to read a packet (and it will be ignored),
|
|
* in case a packet with no data arrived */
|
|
res =
|
|
g_socket_receive_from (udpsrc->used_socket, NULL, NULL,
|
|
0, udpsrc->cancellable, &err);
|
|
if (G_UNLIKELY (res < 0))
|
|
goto receive_error;
|
|
|
|
/* poll again */
|
|
goto retry;
|
|
}
|
|
|
|
no_select:
|
|
GST_LOG_OBJECT (udpsrc, "ioctl says %d bytes available", (int) readsize);
|
|
|
|
/* sanity check value from _get_available_bytes(), which might be as
|
|
* large as the kernel-side buffer on some operating systems */
|
|
if (g_socket_get_family (udpsrc->used_socket) == G_SOCKET_FAMILY_IPV4)
|
|
readsize = MIN (MAX_IPV4_UDP_PACKET_SIZE, readsize);
|
|
|
|
ret = GST_BASE_SRC_CLASS (parent_class)->alloc (GST_BASE_SRC_CAST (udpsrc),
|
|
-1, readsize, &outbuf);
|
|
if (ret != GST_FLOW_OK)
|
|
goto alloc_failed;
|
|
|
|
gst_buffer_map (outbuf, &info, GST_MAP_WRITE);
|
|
offset = 0;
|
|
|
|
if (saddr)
|
|
g_object_unref (saddr);
|
|
saddr = NULL;
|
|
|
|
res =
|
|
g_socket_receive_from (udpsrc->used_socket, &saddr, (gchar *) info.data,
|
|
info.size, udpsrc->cancellable, &err);
|
|
|
|
if (G_UNLIKELY (res < 0)) {
|
|
/* EHOSTUNREACH for a UDP socket means that a packet sent with udpsink
|
|
* generated a "port unreachable" ICMP response. We ignore that and try
|
|
* again. */
|
|
if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_HOST_UNREACHABLE)) {
|
|
gst_buffer_unmap (outbuf, &info);
|
|
gst_buffer_unref (outbuf);
|
|
outbuf = NULL;
|
|
g_clear_error (&err);
|
|
goto retry;
|
|
}
|
|
goto receive_error;
|
|
}
|
|
|
|
/* patch offset and size when stripping off the headers */
|
|
if (G_UNLIKELY (udpsrc->skip_first_bytes != 0)) {
|
|
if (G_UNLIKELY (readsize < udpsrc->skip_first_bytes))
|
|
goto skip_error;
|
|
|
|
offset += udpsrc->skip_first_bytes;
|
|
res -= udpsrc->skip_first_bytes;
|
|
}
|
|
|
|
gst_buffer_unmap (outbuf, &info);
|
|
gst_buffer_resize (outbuf, offset, res);
|
|
|
|
/* use buffer metadata so receivers can also track the address */
|
|
if (saddr) {
|
|
gst_buffer_add_net_address_meta (outbuf, saddr);
|
|
g_object_unref (saddr);
|
|
}
|
|
saddr = NULL;
|
|
|
|
GST_LOG_OBJECT (udpsrc, "read %d bytes", (int) readsize);
|
|
|
|
*buf = GST_BUFFER_CAST (outbuf);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
select_error:
|
|
{
|
|
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
|
|
("select error: %s", err->message));
|
|
g_clear_error (&err);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
stopped:
|
|
{
|
|
GST_DEBUG ("stop called");
|
|
g_clear_error (&err);
|
|
return GST_FLOW_FLUSHING;
|
|
}
|
|
get_available_error:
|
|
{
|
|
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
|
|
("get available bytes failed"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
alloc_failed:
|
|
{
|
|
GST_DEBUG ("Allocation failed");
|
|
return ret;
|
|
}
|
|
receive_error:
|
|
{
|
|
if (outbuf != NULL) {
|
|
gst_buffer_unmap (outbuf, &info);
|
|
gst_buffer_unref (outbuf);
|
|
}
|
|
|
|
if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_BUSY) ||
|
|
g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
|
|
g_clear_error (&err);
|
|
return GST_FLOW_FLUSHING;
|
|
} else {
|
|
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
|
|
("receive error %" G_GSSIZE_FORMAT ": %s", res, err->message));
|
|
g_clear_error (&err);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
skip_error:
|
|
{
|
|
gst_buffer_unmap (outbuf, &info);
|
|
gst_buffer_unref (outbuf);
|
|
|
|
GST_ELEMENT_ERROR (udpsrc, STREAM, DECODE, (NULL),
|
|
("UDP buffer to small to skip header"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_udpsrc_set_uri (GstUDPSrc * src, const gchar * uri, GError ** error)
|
|
{
|
|
gchar *address;
|
|
guint16 port;
|
|
|
|
if (!gst_udp_parse_uri (uri, &address, &port))
|
|
goto wrong_uri;
|
|
|
|
if (port == (guint16) - 1)
|
|
port = UDP_DEFAULT_PORT;
|
|
|
|
g_free (src->address);
|
|
src->address = address;
|
|
src->port = port;
|
|
|
|
g_free (src->uri);
|
|
src->uri = g_strdup (uri);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
wrong_uri:
|
|
{
|
|
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
|
|
("error parsing uri %s", uri));
|
|
g_set_error_literal (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
|
|
"Could not parse UDP URI");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_udpsrc_set_property (GObject * object, guint prop_id, const GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstUDPSrc *udpsrc = GST_UDPSRC (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_BUFFER_SIZE:
|
|
udpsrc->buffer_size = g_value_get_int (value);
|
|
break;
|
|
case PROP_PORT:
|
|
udpsrc->port = g_value_get_int (value);
|
|
g_free (udpsrc->uri);
|
|
udpsrc->uri =
|
|
g_strdup_printf ("udp://%s:%u", udpsrc->address, udpsrc->port);
|
|
break;
|
|
case PROP_MULTICAST_GROUP:
|
|
case PROP_ADDRESS:
|
|
{
|
|
const gchar *group;
|
|
|
|
g_free (udpsrc->address);
|
|
if ((group = g_value_get_string (value)))
|
|
udpsrc->address = g_strdup (group);
|
|
else
|
|
udpsrc->address = g_strdup (UDP_DEFAULT_MULTICAST_GROUP);
|
|
|
|
g_free (udpsrc->uri);
|
|
udpsrc->uri =
|
|
g_strdup_printf ("udp://%s:%u", udpsrc->address, udpsrc->port);
|
|
break;
|
|
}
|
|
case PROP_MULTICAST_IFACE:
|
|
g_free (udpsrc->multi_iface);
|
|
|
|
if (g_value_get_string (value) == NULL)
|
|
udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
|
|
else
|
|
udpsrc->multi_iface = g_value_dup_string (value);
|
|
break;
|
|
case PROP_URI:
|
|
gst_udpsrc_set_uri (udpsrc, g_value_get_string (value), NULL);
|
|
break;
|
|
case PROP_CAPS:
|
|
{
|
|
const GstCaps *new_caps_val = gst_value_get_caps (value);
|
|
GstCaps *new_caps;
|
|
GstCaps *old_caps;
|
|
|
|
if (new_caps_val == NULL) {
|
|
new_caps = gst_caps_new_any ();
|
|
} else {
|
|
new_caps = gst_caps_copy (new_caps_val);
|
|
}
|
|
|
|
GST_OBJECT_LOCK (udpsrc);
|
|
old_caps = udpsrc->caps;
|
|
udpsrc->caps = new_caps;
|
|
GST_OBJECT_UNLOCK (udpsrc);
|
|
if (old_caps)
|
|
gst_caps_unref (old_caps);
|
|
|
|
gst_pad_mark_reconfigure (GST_BASE_SRC_PAD (udpsrc));
|
|
break;
|
|
}
|
|
case PROP_SOCKET:
|
|
if (udpsrc->socket != NULL && udpsrc->socket != udpsrc->used_socket &&
|
|
udpsrc->close_socket) {
|
|
GError *err = NULL;
|
|
|
|
if (!g_socket_close (udpsrc->socket, &err)) {
|
|
GST_ERROR ("failed to close socket %p: %s", udpsrc->socket,
|
|
err->message);
|
|
g_clear_error (&err);
|
|
}
|
|
}
|
|
if (udpsrc->socket)
|
|
g_object_unref (udpsrc->socket);
|
|
udpsrc->socket = g_value_dup_object (value);
|
|
GST_DEBUG ("setting socket to %p", udpsrc->socket);
|
|
break;
|
|
case PROP_TIMEOUT:
|
|
udpsrc->timeout = g_value_get_uint64 (value);
|
|
break;
|
|
case PROP_SKIP_FIRST_BYTES:
|
|
udpsrc->skip_first_bytes = g_value_get_int (value);
|
|
break;
|
|
case PROP_CLOSE_SOCKET:
|
|
udpsrc->close_socket = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_AUTO_MULTICAST:
|
|
udpsrc->auto_multicast = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_REUSE:
|
|
udpsrc->reuse = g_value_get_boolean (value);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_udpsrc_get_property (GObject * object, guint prop_id, GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstUDPSrc *udpsrc = GST_UDPSRC (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_BUFFER_SIZE:
|
|
g_value_set_int (value, udpsrc->buffer_size);
|
|
break;
|
|
case PROP_PORT:
|
|
g_value_set_int (value, udpsrc->port);
|
|
break;
|
|
case PROP_MULTICAST_GROUP:
|
|
case PROP_ADDRESS:
|
|
g_value_set_string (value, udpsrc->address);
|
|
break;
|
|
case PROP_MULTICAST_IFACE:
|
|
g_value_set_string (value, udpsrc->multi_iface);
|
|
break;
|
|
case PROP_URI:
|
|
g_value_set_string (value, udpsrc->uri);
|
|
break;
|
|
case PROP_CAPS:
|
|
GST_OBJECT_LOCK (udpsrc);
|
|
gst_value_set_caps (value, udpsrc->caps);
|
|
GST_OBJECT_UNLOCK (udpsrc);
|
|
break;
|
|
case PROP_SOCKET:
|
|
g_value_set_object (value, udpsrc->socket);
|
|
break;
|
|
case PROP_TIMEOUT:
|
|
g_value_set_uint64 (value, udpsrc->timeout);
|
|
break;
|
|
case PROP_SKIP_FIRST_BYTES:
|
|
g_value_set_int (value, udpsrc->skip_first_bytes);
|
|
break;
|
|
case PROP_CLOSE_SOCKET:
|
|
g_value_set_boolean (value, udpsrc->close_socket);
|
|
break;
|
|
case PROP_USED_SOCKET:
|
|
g_value_set_object (value, udpsrc->used_socket);
|
|
break;
|
|
case PROP_AUTO_MULTICAST:
|
|
g_value_set_boolean (value, udpsrc->auto_multicast);
|
|
break;
|
|
case PROP_REUSE:
|
|
g_value_set_boolean (value, udpsrc->reuse);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GInetAddress *
|
|
gst_udpsrc_resolve (GstUDPSrc * src, const gchar * address)
|
|
{
|
|
GInetAddress *addr;
|
|
GError *err = NULL;
|
|
GResolver *resolver;
|
|
|
|
addr = g_inet_address_new_from_string (address);
|
|
if (!addr) {
|
|
GList *results;
|
|
|
|
GST_DEBUG_OBJECT (src, "resolving IP address for host %s", address);
|
|
resolver = g_resolver_get_default ();
|
|
results =
|
|
g_resolver_lookup_by_name (resolver, address, src->cancellable, &err);
|
|
if (!results)
|
|
goto name_resolve;
|
|
addr = G_INET_ADDRESS (g_object_ref (results->data));
|
|
|
|
g_resolver_free_addresses (results);
|
|
g_object_unref (resolver);
|
|
}
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
{
|
|
gchar *ip = g_inet_address_to_string (addr);
|
|
|
|
GST_DEBUG_OBJECT (src, "IP address for host %s is %s", address, ip);
|
|
g_free (ip);
|
|
}
|
|
#endif
|
|
|
|
return addr;
|
|
|
|
name_resolve:
|
|
{
|
|
GST_WARNING_OBJECT (src, "Failed to resolve %s: %s", address, err->message);
|
|
g_clear_error (&err);
|
|
g_object_unref (resolver);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* create a socket for sending to remote machine */
|
|
static gboolean
|
|
gst_udpsrc_open (GstUDPSrc * src)
|
|
{
|
|
GInetAddress *addr, *bind_addr;
|
|
GSocketAddress *bind_saddr;
|
|
GError *err = NULL;
|
|
|
|
if (src->socket == NULL) {
|
|
/* need to allocate a socket */
|
|
GST_DEBUG_OBJECT (src, "allocating socket for %s:%d", src->address,
|
|
src->port);
|
|
|
|
addr = gst_udpsrc_resolve (src, src->address);
|
|
if (!addr)
|
|
goto name_resolve;
|
|
|
|
if ((src->used_socket =
|
|
g_socket_new (g_inet_address_get_family (addr),
|
|
G_SOCKET_TYPE_DATAGRAM, G_SOCKET_PROTOCOL_UDP, &err)) == NULL)
|
|
goto no_socket;
|
|
|
|
src->external_socket = FALSE;
|
|
|
|
GST_DEBUG_OBJECT (src, "got socket %p", src->used_socket);
|
|
|
|
if (src->addr)
|
|
g_object_unref (src->addr);
|
|
src->addr =
|
|
G_INET_SOCKET_ADDRESS (g_inet_socket_address_new (addr, src->port));
|
|
|
|
GST_DEBUG_OBJECT (src, "binding on port %d", src->port);
|
|
|
|
/* On Windows it's not possible to bind to a multicast address
|
|
* but the OS will make sure to filter out all packets that
|
|
* arrive not for the multicast address the socket joined.
|
|
*
|
|
* On Linux and others it is necessary to bind to a multicast
|
|
* address to let the OS filter out all packets that are received
|
|
* on the same port but for different addresses than the multicast
|
|
* address
|
|
*/
|
|
#ifdef G_OS_WIN32
|
|
if (g_inet_address_get_is_multicast (addr))
|
|
bind_addr = g_inet_address_new_any (g_inet_address_get_family (addr));
|
|
else
|
|
#endif
|
|
bind_addr = G_INET_ADDRESS (g_object_ref (addr));
|
|
|
|
g_object_unref (addr);
|
|
|
|
bind_saddr = g_inet_socket_address_new (bind_addr, src->port);
|
|
g_object_unref (bind_addr);
|
|
if (!g_socket_bind (src->used_socket, bind_saddr, src->reuse, &err))
|
|
goto bind_error;
|
|
|
|
g_object_unref (bind_saddr);
|
|
} else {
|
|
GST_DEBUG_OBJECT (src, "using provided socket %p", src->socket);
|
|
/* we use the configured socket, try to get some info about it */
|
|
src->used_socket = G_SOCKET (g_object_ref (src->socket));
|
|
src->external_socket = TRUE;
|
|
|
|
if (src->addr)
|
|
g_object_unref (src->addr);
|
|
src->addr =
|
|
G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket,
|
|
&err));
|
|
if (!src->addr)
|
|
goto getsockname_error;
|
|
}
|
|
|
|
#if GLIB_CHECK_VERSION (2, 35, 7)
|
|
{
|
|
gint val = 0;
|
|
|
|
if (src->buffer_size != 0) {
|
|
GError *opt_err = NULL;
|
|
|
|
GST_INFO_OBJECT (src, "setting udp buffer of %d bytes", src->buffer_size);
|
|
/* set buffer size, Note that on Linux this is typically limited to a
|
|
* maximum of around 100K. Also a minimum of 128 bytes is required on
|
|
* Linux. */
|
|
if (!g_socket_set_option (src->used_socket, SOL_SOCKET, SO_RCVBUF,
|
|
src->buffer_size, &opt_err)) {
|
|
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
|
|
("Could not create a buffer of requested %d bytes: %s",
|
|
src->buffer_size, opt_err->message));
|
|
g_error_free (opt_err);
|
|
opt_err = NULL;
|
|
}
|
|
}
|
|
|
|
/* read the value of the receive buffer. Note that on linux this returns
|
|
* 2x the value we set because the kernel allocates extra memory for
|
|
* metadata. The default on Linux is about 100K (which is about 50K
|
|
* without metadata) */
|
|
if (g_socket_get_option (src->used_socket, SOL_SOCKET, SO_RCVBUF, &val,
|
|
NULL)) {
|
|
GST_INFO_OBJECT (src, "have udp buffer of %d bytes", val);
|
|
} else {
|
|
GST_DEBUG_OBJECT (src, "could not get udp buffer size");
|
|
}
|
|
}
|
|
#elif defined (SO_RCVBUF)
|
|
{
|
|
gint rcvsize, ret;
|
|
socklen_t len;
|
|
|
|
len = sizeof (rcvsize);
|
|
if (src->buffer_size != 0) {
|
|
rcvsize = src->buffer_size;
|
|
|
|
GST_DEBUG_OBJECT (src, "setting udp buffer of %d bytes", rcvsize);
|
|
/* set buffer size, Note that on Linux this is typically limited to a
|
|
* maximum of around 100K. Also a minimum of 128 bytes is required on
|
|
* Linux. */
|
|
ret =
|
|
setsockopt (g_socket_get_fd (src->used_socket), SOL_SOCKET, SO_RCVBUF,
|
|
(void *) &rcvsize, len);
|
|
if (ret != 0) {
|
|
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
|
|
("Could not create a buffer of requested %d bytes, %d: %s (%d)",
|
|
rcvsize, ret, g_strerror (errno), errno));
|
|
}
|
|
}
|
|
|
|
/* read the value of the receive buffer. Note that on linux this returns 2x the
|
|
* value we set because the kernel allocates extra memory for metadata.
|
|
* The default on Linux is about 100K (which is about 50K without metadata) */
|
|
ret =
|
|
getsockopt (g_socket_get_fd (src->used_socket), SOL_SOCKET, SO_RCVBUF,
|
|
(void *) &rcvsize, &len);
|
|
if (ret == 0)
|
|
GST_DEBUG_OBJECT (src, "have udp buffer of %d bytes", rcvsize);
|
|
else
|
|
GST_DEBUG_OBJECT (src, "could not get udp buffer size");
|
|
}
|
|
#else
|
|
if (src->buffer_size != 0) {
|
|
GST_WARNING_OBJECT (src, "don't know how to set udp buffer size on this "
|
|
"OS. Consider upgrading your GLib to >= 2.35.7 and re-compiling the "
|
|
"GStreamer udp plugin");
|
|
}
|
|
#endif
|
|
|
|
g_socket_set_broadcast (src->used_socket, TRUE);
|
|
|
|
if (src->auto_multicast
|
|
&&
|
|
g_inet_address_get_is_multicast (g_inet_socket_address_get_address
|
|
(src->addr))) {
|
|
GST_DEBUG_OBJECT (src, "joining multicast group %s", src->address);
|
|
if (!g_socket_join_multicast_group (src->used_socket,
|
|
g_inet_socket_address_get_address (src->addr),
|
|
FALSE, src->multi_iface, &err))
|
|
goto membership;
|
|
}
|
|
|
|
/* NOTE: sockaddr_in.sin_port works for ipv4 and ipv6 because sin_port
|
|
* follows ss_family on both */
|
|
{
|
|
GInetSocketAddress *addr;
|
|
guint16 port;
|
|
|
|
addr =
|
|
G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket,
|
|
&err));
|
|
if (!addr)
|
|
goto getsockname_error;
|
|
|
|
port = g_inet_socket_address_get_port (addr);
|
|
GST_DEBUG_OBJECT (src, "bound, on port %d", port);
|
|
if (port != src->port) {
|
|
src->port = port;
|
|
GST_DEBUG_OBJECT (src, "notifying port %d", port);
|
|
g_object_notify (G_OBJECT (src), "port");
|
|
}
|
|
g_object_unref (addr);
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
name_resolve:
|
|
{
|
|
return FALSE;
|
|
}
|
|
no_socket:
|
|
{
|
|
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
|
|
("no socket error: %s", err->message));
|
|
g_clear_error (&err);
|
|
g_object_unref (addr);
|
|
return FALSE;
|
|
}
|
|
bind_error:
|
|
{
|
|
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
|
|
("bind failed: %s", err->message));
|
|
g_clear_error (&err);
|
|
g_object_unref (bind_saddr);
|
|
gst_udpsrc_close (src);
|
|
return FALSE;
|
|
}
|
|
membership:
|
|
{
|
|
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
|
|
("could add membership: %s", err->message));
|
|
g_clear_error (&err);
|
|
gst_udpsrc_close (src);
|
|
return FALSE;
|
|
}
|
|
getsockname_error:
|
|
{
|
|
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
|
|
("getsockname failed: %s", err->message));
|
|
g_clear_error (&err);
|
|
gst_udpsrc_close (src);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_udpsrc_unlock (GstBaseSrc * bsrc)
|
|
{
|
|
GstUDPSrc *src;
|
|
|
|
src = GST_UDPSRC (bsrc);
|
|
|
|
GST_LOG_OBJECT (src, "Flushing");
|
|
g_cancellable_cancel (src->cancellable);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_udpsrc_unlock_stop (GstBaseSrc * bsrc)
|
|
{
|
|
GstUDPSrc *src;
|
|
|
|
src = GST_UDPSRC (bsrc);
|
|
|
|
GST_LOG_OBJECT (src, "No longer flushing");
|
|
g_cancellable_reset (src->cancellable);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_udpsrc_close (GstUDPSrc * src)
|
|
{
|
|
GST_DEBUG ("closing sockets");
|
|
|
|
if (src->used_socket) {
|
|
if (src->auto_multicast
|
|
&&
|
|
g_inet_address_get_is_multicast (g_inet_socket_address_get_address
|
|
(src->addr))) {
|
|
GError *err = NULL;
|
|
|
|
GST_DEBUG_OBJECT (src, "leaving multicast group %s", src->address);
|
|
|
|
if (!g_socket_leave_multicast_group (src->used_socket,
|
|
g_inet_socket_address_get_address (src->addr), FALSE,
|
|
src->multi_iface, &err)) {
|
|
GST_ERROR_OBJECT (src, "Failed to leave multicast group: %s",
|
|
err->message);
|
|
g_clear_error (&err);
|
|
}
|
|
}
|
|
|
|
if (src->close_socket || !src->external_socket) {
|
|
GError *err = NULL;
|
|
if (!g_socket_close (src->used_socket, &err)) {
|
|
GST_ERROR_OBJECT (src, "Failed to close socket: %s", err->message);
|
|
g_clear_error (&err);
|
|
}
|
|
}
|
|
|
|
g_object_unref (src->used_socket);
|
|
src->used_socket = NULL;
|
|
g_object_unref (src->addr);
|
|
src->addr = NULL;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static GstStateChangeReturn
|
|
gst_udpsrc_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstUDPSrc *src;
|
|
GstStateChangeReturn result;
|
|
|
|
src = GST_UDPSRC (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
if (!gst_udpsrc_open (src))
|
|
goto open_failed;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if ((result =
|
|
GST_ELEMENT_CLASS (parent_class)->change_state (element,
|
|
transition)) == GST_STATE_CHANGE_FAILURE)
|
|
goto failure;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
gst_udpsrc_close (src);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return result;
|
|
/* ERRORS */
|
|
open_failed:
|
|
{
|
|
GST_DEBUG_OBJECT (src, "failed to open socket");
|
|
return GST_STATE_CHANGE_FAILURE;
|
|
}
|
|
failure:
|
|
{
|
|
GST_DEBUG_OBJECT (src, "parent failed state change");
|
|
return result;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
/*** GSTURIHANDLER INTERFACE *************************************************/
|
|
|
|
static GstURIType
|
|
gst_udpsrc_uri_get_type (GType type)
|
|
{
|
|
return GST_URI_SRC;
|
|
}
|
|
|
|
static const gchar *const *
|
|
gst_udpsrc_uri_get_protocols (GType type)
|
|
{
|
|
static const gchar *protocols[] = { "udp", NULL };
|
|
|
|
return protocols;
|
|
}
|
|
|
|
static gchar *
|
|
gst_udpsrc_uri_get_uri (GstURIHandler * handler)
|
|
{
|
|
GstUDPSrc *src = GST_UDPSRC (handler);
|
|
|
|
return g_strdup (src->uri);
|
|
}
|
|
|
|
static gboolean
|
|
gst_udpsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri,
|
|
GError ** error)
|
|
{
|
|
return gst_udpsrc_set_uri (GST_UDPSRC (handler), uri, error);
|
|
}
|
|
|
|
static void
|
|
gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
|
|
{
|
|
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
|
|
|
|
iface->get_type = gst_udpsrc_uri_get_type;
|
|
iface->get_protocols = gst_udpsrc_uri_get_protocols;
|
|
iface->get_uri = gst_udpsrc_uri_get_uri;
|
|
iface->set_uri = gst_udpsrc_uri_set_uri;
|
|
}
|