| /* GStreamer |
| * Copyright (C) <2005> Wim Taymans <wim@fluendo.com> |
| * Copyright (C) <2005> Nokia Corporation <kai.vehmanen@nokia.com> |
| * Copyright (C) <2012> Collabora Ltd. |
| * Author: Sebastian Dröge <sebastian.droege@collabora.co.uk> |
| * Copyright (C) 2014 Tim-Philipp Müller <tim@centricular.com> |
| * Copyright (C) 2014 Centricular Ltd |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| /** |
| * SECTION:element-udpsrc |
| * @see_also: udpsink, multifdsink |
| * |
| * udpsrc is a network source that reads UDP packets from the network. |
| * It can be combined with RTP depayloaders to implement RTP streaming. |
| * |
| * The udpsrc element supports automatic port allocation by setting the |
| * #GstUDPSrc:port property to 0. After setting the udpsrc to PAUSED, the |
| * allocated port can be obtained by reading the port property. |
| * |
| * udpsrc can read from multicast groups by setting the #GstUDPSrc:multicast-group |
| * property to the IP address of the multicast group. |
| * |
| * Alternatively one can provide a custom socket to udpsrc with the #GstUDPSrc:socket |
| * property, udpsrc will then not allocate a socket itself but use the provided |
| * one. |
| * |
| * The #GstUDPSrc:caps property is mainly used to give a type to the UDP packet |
| * so that they can be autoplugged in GStreamer pipelines. This is very useful |
| * for RTP implementations where the contents of the UDP packets is transfered |
| * out-of-bounds using SDP or other means. |
| * |
| * The #GstUDPSrc:buffer-size property is used to change the default kernel |
| * buffersizes used for receiving packets. The buffer size may be increased for |
| * high-volume connections, or may be decreased to limit the possible backlog of |
| * incoming data. The system places an absolute limit on these values, on Linux, |
| * for example, the default buffer size is typically 50K and can be increased to |
| * maximally 100K. |
| * |
| * The #GstUDPSrc:skip-first-bytes property is used to strip off an arbitrary |
| * number of bytes from the start of the raw udp packet and can be used to strip |
| * off proprietary header, for example. |
| * |
| * The udpsrc is always a live source. It does however not provide a #GstClock, |
| * this is left for upstream elements such as an RTP session manager or demuxer |
| * (such as an MPEG demuxer). As with all live sources, the captured buffers |
| * will have their timestamp set to the current running time of the pipeline. |
| * |
| * udpsrc implements a #GstURIHandler interface that handles udp://host:port |
| * type URIs. |
| * |
| * If the #GstUDPSrc:timeout property is set to a value bigger than 0, udpsrc |
| * will generate an element message named |
| * <classname>"GstUDPSrcTimeout"</classname> |
| * if no data was recieved in the given timeout. |
| * The message's structure contains one field: |
| * <itemizedlist> |
| * <listitem> |
| * <para> |
| * #guint64 |
| * <classname>"timeout"</classname>: the timeout in microseconds that |
| * expired when waiting for data. |
| * </para> |
| * </listitem> |
| * </itemizedlist> |
| * The message is typically used to detect that no UDP arrives in the receiver |
| * because it is blocked by a firewall. |
| * |
| * A custom file descriptor can be configured with the |
| * #GstUDPSrc:socket property. The socket will be closed when setting |
| * the element to READY by default. This behaviour can be overriden |
| * with the #GstUDPSrc:close-socket property, in which case the |
| * application is responsible for closing the file descriptor. |
| * |
| * <refsect2> |
| * <title>Examples</title> |
| * |[ |
| * gst-launch-1.0 -v udpsrc ! fakesink dump=1 |
| * ]| A pipeline to read from the default port and dump the udp packets. |
| * To actually generate udp packets on the default port one can use the |
| * udpsink element. When running the following pipeline in another terminal, the |
| * above mentioned pipeline should dump data packets to the console. |
| * |[ |
| * gst-launch-1.0 -v audiotestsrc ! udpsink |
| * ]| |
| * |[ |
| * gst-launch-1.0 -v udpsrc port=0 ! fakesink |
| * ]| read udp packets from a free port. |
| * </refsect2> |
| */ |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <string.h> |
| #include "gstudpsrc.h" |
| |
| #include <gst/net/gstnetaddressmeta.h> |
| |
| #include <gio/gnetworking.h> |
| |
| /* not 100% correct, but a good upper bound for memory allocation purposes */ |
| #define MAX_IPV4_UDP_PACKET_SIZE (65536 - 8) |
| |
| GST_DEBUG_CATEGORY_STATIC (udpsrc_debug); |
| #define GST_CAT_DEFAULT (udpsrc_debug) |
| |
| static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS_ANY); |
| |
| #define UDP_DEFAULT_PORT 5004 |
| #define UDP_DEFAULT_MULTICAST_GROUP "0.0.0.0" |
| #define UDP_DEFAULT_MULTICAST_IFACE NULL |
| #define UDP_DEFAULT_URI "udp://"UDP_DEFAULT_MULTICAST_GROUP":"G_STRINGIFY(UDP_DEFAULT_PORT) |
| #define UDP_DEFAULT_CAPS NULL |
| #define UDP_DEFAULT_SOCKET NULL |
| #define UDP_DEFAULT_BUFFER_SIZE 0 |
| #define UDP_DEFAULT_TIMEOUT 0 |
| #define UDP_DEFAULT_SKIP_FIRST_BYTES 0 |
| #define UDP_DEFAULT_CLOSE_SOCKET TRUE |
| #define UDP_DEFAULT_USED_SOCKET NULL |
| #define UDP_DEFAULT_AUTO_MULTICAST TRUE |
| #define UDP_DEFAULT_REUSE TRUE |
| #define UDP_DEFAULT_LOOP TRUE |
| |
| enum |
| { |
| PROP_0, |
| |
| PROP_PORT, |
| PROP_MULTICAST_GROUP, |
| PROP_MULTICAST_IFACE, |
| PROP_URI, |
| PROP_CAPS, |
| PROP_SOCKET, |
| PROP_BUFFER_SIZE, |
| PROP_TIMEOUT, |
| PROP_SKIP_FIRST_BYTES, |
| PROP_CLOSE_SOCKET, |
| PROP_USED_SOCKET, |
| PROP_AUTO_MULTICAST, |
| PROP_REUSE, |
| PROP_ADDRESS, |
| PROP_LOOP |
| }; |
| |
| static void gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data); |
| |
| static GstCaps *gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter); |
| static GstFlowReturn gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf); |
| static gboolean gst_udpsrc_close (GstUDPSrc * src); |
| static gboolean gst_udpsrc_unlock (GstBaseSrc * bsrc); |
| static gboolean gst_udpsrc_unlock_stop (GstBaseSrc * bsrc); |
| static gboolean gst_udpsrc_negotiate (GstBaseSrc * basesrc); |
| |
| static void gst_udpsrc_finalize (GObject * object); |
| |
| static void gst_udpsrc_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec); |
| static void gst_udpsrc_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec); |
| |
| static GstStateChangeReturn gst_udpsrc_change_state (GstElement * element, |
| GstStateChange transition); |
| |
| #define gst_udpsrc_parent_class parent_class |
| G_DEFINE_TYPE_WITH_CODE (GstUDPSrc, gst_udpsrc, GST_TYPE_PUSH_SRC, |
| G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_udpsrc_uri_handler_init)); |
| |
| static void |
| gst_udpsrc_class_init (GstUDPSrcClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *gstelement_class; |
| GstBaseSrcClass *gstbasesrc_class; |
| GstPushSrcClass *gstpushsrc_class; |
| |
| gobject_class = (GObjectClass *) klass; |
| gstelement_class = (GstElementClass *) klass; |
| gstbasesrc_class = (GstBaseSrcClass *) klass; |
| gstpushsrc_class = (GstPushSrcClass *) klass; |
| |
| GST_DEBUG_CATEGORY_INIT (udpsrc_debug, "udpsrc", 0, "UDP src"); |
| |
| gobject_class->set_property = gst_udpsrc_set_property; |
| gobject_class->get_property = gst_udpsrc_get_property; |
| gobject_class->finalize = gst_udpsrc_finalize; |
| |
| g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT, |
| g_param_spec_int ("port", "Port", |
| "The port to receive the packets from, 0=allocate", 0, G_MAXUINT16, |
| UDP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| /* FIXME 2.0: Remove multicast-group property */ |
| #ifndef GST_REMOVE_DEPRECATED |
| g_object_class_install_property (gobject_class, PROP_MULTICAST_GROUP, |
| g_param_spec_string ("multicast-group", "Multicast Group", |
| "The Address of multicast group to join. (DEPRECATED: " |
| "Use address property instead)", UDP_DEFAULT_MULTICAST_GROUP, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_DEPRECATED)); |
| #endif |
| g_object_class_install_property (gobject_class, PROP_MULTICAST_IFACE, |
| g_param_spec_string ("multicast-iface", "Multicast Interface", |
| "The network interface on which to join the multicast group", |
| UDP_DEFAULT_MULTICAST_IFACE, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_URI, |
| g_param_spec_string ("uri", "URI", |
| "URI in the form of udp://multicast_group:port", UDP_DEFAULT_URI, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_CAPS, |
| g_param_spec_boxed ("caps", "Caps", |
| "The caps of the source pad", GST_TYPE_CAPS, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_SOCKET, |
| g_param_spec_object ("socket", "Socket", |
| "Socket to use for UDP reception. (NULL == allocate)", |
| G_TYPE_SOCKET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE, |
| g_param_spec_int ("buffer-size", "Buffer Size", |
| "Size of the kernel receive buffer in bytes, 0=default", 0, G_MAXINT, |
| UDP_DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT, |
| g_param_spec_uint64 ("timeout", "Timeout", |
| "Post a message after timeout nanoseconds (0 = disabled)", 0, |
| G_MAXUINT64, UDP_DEFAULT_TIMEOUT, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (G_OBJECT_CLASS (klass), |
| PROP_SKIP_FIRST_BYTES, g_param_spec_int ("skip-first-bytes", |
| "Skip first bytes", "number of bytes to skip for each udp packet", 0, |
| G_MAXINT, UDP_DEFAULT_SKIP_FIRST_BYTES, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_CLOSE_SOCKET, |
| g_param_spec_boolean ("close-socket", "Close socket", |
| "Close socket if passed as property on state change", |
| UDP_DEFAULT_CLOSE_SOCKET, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_USED_SOCKET, |
| g_param_spec_object ("used-socket", "Socket Handle", |
| "Socket currently in use for UDP reception. (NULL = no socket)", |
| G_TYPE_SOCKET, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_AUTO_MULTICAST, |
| g_param_spec_boolean ("auto-multicast", "Auto Multicast", |
| "Automatically join/leave multicast groups", |
| UDP_DEFAULT_AUTO_MULTICAST, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_REUSE, |
| g_param_spec_boolean ("reuse", "Reuse", "Enable reuse of the port", |
| UDP_DEFAULT_REUSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_ADDRESS, |
| g_param_spec_string ("address", "Address", |
| "Address to receive packets for. This is equivalent to the " |
| "multicast-group property for now", UDP_DEFAULT_MULTICAST_GROUP, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_LOOP, |
| g_param_spec_boolean ("loop", "Multicast Loopback", |
| "Used for setting the multicast loop parameter. TRUE = enable," |
| " FALSE = disable", UDP_DEFAULT_LOOP, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| gst_element_class_add_pad_template (gstelement_class, |
| gst_static_pad_template_get (&src_template)); |
| |
| gst_element_class_set_static_metadata (gstelement_class, |
| "UDP packet receiver", "Source/Network", |
| "Receive data over the network via UDP", |
| "Wim Taymans <wim@fluendo.com>, " |
| "Thijs Vermeir <thijs.vermeir@barco.com>"); |
| |
| gstelement_class->change_state = gst_udpsrc_change_state; |
| |
| gstbasesrc_class->unlock = gst_udpsrc_unlock; |
| gstbasesrc_class->unlock_stop = gst_udpsrc_unlock_stop; |
| gstbasesrc_class->get_caps = gst_udpsrc_getcaps; |
| gstbasesrc_class->negotiate = gst_udpsrc_negotiate; |
| |
| gstpushsrc_class->create = gst_udpsrc_create; |
| } |
| |
| static void |
| gst_udpsrc_init (GstUDPSrc * udpsrc) |
| { |
| udpsrc->uri = |
| g_strdup_printf ("udp://%s:%u", UDP_DEFAULT_MULTICAST_GROUP, |
| UDP_DEFAULT_PORT); |
| |
| udpsrc->address = g_strdup (UDP_DEFAULT_MULTICAST_GROUP); |
| udpsrc->port = UDP_DEFAULT_PORT; |
| udpsrc->socket = UDP_DEFAULT_SOCKET; |
| udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE); |
| udpsrc->buffer_size = UDP_DEFAULT_BUFFER_SIZE; |
| udpsrc->timeout = UDP_DEFAULT_TIMEOUT; |
| udpsrc->skip_first_bytes = UDP_DEFAULT_SKIP_FIRST_BYTES; |
| udpsrc->close_socket = UDP_DEFAULT_CLOSE_SOCKET; |
| udpsrc->external_socket = (udpsrc->socket != NULL); |
| udpsrc->auto_multicast = UDP_DEFAULT_AUTO_MULTICAST; |
| udpsrc->used_socket = UDP_DEFAULT_USED_SOCKET; |
| udpsrc->reuse = UDP_DEFAULT_REUSE; |
| udpsrc->loop = UDP_DEFAULT_LOOP; |
| |
| /* configure basesrc to be a live source */ |
| gst_base_src_set_live (GST_BASE_SRC (udpsrc), TRUE); |
| /* make basesrc output a segment in time */ |
| gst_base_src_set_format (GST_BASE_SRC (udpsrc), GST_FORMAT_TIME); |
| /* make basesrc set timestamps on outgoing buffers based on the running_time |
| * when they were captured */ |
| gst_base_src_set_do_timestamp (GST_BASE_SRC (udpsrc), TRUE); |
| } |
| |
| static void |
| gst_udpsrc_finalize (GObject * object) |
| { |
| GstUDPSrc *udpsrc; |
| |
| udpsrc = GST_UDPSRC (object); |
| |
| if (udpsrc->caps) |
| gst_caps_unref (udpsrc->caps); |
| udpsrc->caps = NULL; |
| |
| g_free (udpsrc->multi_iface); |
| udpsrc->multi_iface = NULL; |
| |
| g_free (udpsrc->uri); |
| udpsrc->uri = NULL; |
| |
| g_free (udpsrc->address); |
| udpsrc->address = NULL; |
| |
| if (udpsrc->socket) |
| g_object_unref (udpsrc->socket); |
| udpsrc->socket = NULL; |
| |
| if (udpsrc->used_socket) |
| g_object_unref (udpsrc->used_socket); |
| udpsrc->used_socket = NULL; |
| |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| static GstCaps * |
| gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter) |
| { |
| GstUDPSrc *udpsrc; |
| GstCaps *caps, *result; |
| |
| udpsrc = GST_UDPSRC (src); |
| |
| GST_OBJECT_LOCK (src); |
| if ((caps = udpsrc->caps)) |
| gst_caps_ref (caps); |
| GST_OBJECT_UNLOCK (src); |
| |
| if (caps) { |
| if (filter) { |
| result = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST); |
| gst_caps_unref (caps); |
| } else { |
| result = caps; |
| } |
| } else { |
| result = (filter) ? gst_caps_ref (filter) : gst_caps_new_any (); |
| } |
| return result; |
| } |
| |
| static void |
| gst_udpsrc_reset_memory_allocator (GstUDPSrc * src) |
| { |
| if (src->mem != NULL) { |
| gst_memory_unmap (src->mem, &src->map); |
| gst_memory_unref (src->mem); |
| src->mem = NULL; |
| } |
| if (src->mem_max != NULL) { |
| gst_memory_unmap (src->mem_max, &src->map_max); |
| gst_memory_unref (src->mem_max); |
| src->mem_max = NULL; |
| } |
| |
| src->vec[0].buffer = NULL; |
| src->vec[0].size = 0; |
| src->vec[1].buffer = NULL; |
| src->vec[1].size = 0; |
| |
| if (src->allocator != NULL) { |
| gst_object_unref (src->allocator); |
| src->allocator = NULL; |
| } |
| } |
| |
| static gboolean |
| gst_udpsrc_negotiate (GstBaseSrc * basesrc) |
| { |
| GstUDPSrc *src = GST_UDPSRC_CAST (basesrc); |
| gboolean ret; |
| |
| /* just chain up to the default implementation, we just want to |
| * retrieve the allocator at the end of it (if there is one) */ |
| ret = GST_BASE_SRC_CLASS (parent_class)->negotiate (basesrc); |
| |
| if (ret) { |
| GstAllocationParams new_params; |
| GstAllocator *new_allocator = NULL; |
| |
| /* retrieve new allocator */ |
| gst_base_src_get_allocator (basesrc, &new_allocator, &new_params); |
| |
| if (src->allocator != new_allocator || |
| memcmp (&src->params, &new_params, sizeof (GstAllocationParams)) != 0) { |
| /* drop old allocator and throw away any memory allocated with it */ |
| gst_udpsrc_reset_memory_allocator (src); |
| |
| /* and save the new allocator and/or new allocation parameters */ |
| src->allocator = new_allocator; |
| src->params = new_params; |
| |
| GST_INFO_OBJECT (src, "new allocator: %" GST_PTR_FORMAT, new_allocator); |
| } |
| } |
| |
| return ret; |
| } |
| |
| static gboolean |
| gst_udpsrc_alloc_mem (GstUDPSrc * src, GstMemory ** p_mem, GstMapInfo * map, |
| gsize size) |
| { |
| GstMemory *mem; |
| |
| mem = gst_allocator_alloc (src->allocator, size, &src->params); |
| |
| if (!gst_memory_map (mem, map, GST_MAP_WRITE)) { |
| gst_memory_unref (mem); |
| memset (map, 0, sizeof (GstMapInfo)); |
| return FALSE; |
| } |
| *p_mem = mem; |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_udpsrc_ensure_mem (GstUDPSrc * src) |
| { |
| if (src->mem == NULL) { |
| gsize mem_size = 1500; /* typical max. MTU */ |
| |
| /* if packets are likely to be smaller, just use that size, otherwise |
| * default to assuming incoming packets are around MTU size */ |
| if (src->max_size > 0 && src->max_size < mem_size) |
| mem_size = src->max_size; |
| |
| if (!gst_udpsrc_alloc_mem (src, &src->mem, &src->map, mem_size)) |
| return FALSE; |
| |
| src->vec[0].buffer = src->map.data; |
| src->vec[0].size = src->map.size; |
| } |
| |
| if (src->mem_max == NULL) { |
| gsize max_size = MAX_IPV4_UDP_PACKET_SIZE; |
| |
| if (!gst_udpsrc_alloc_mem (src, &src->mem_max, &src->map_max, max_size)) |
| return FALSE; |
| |
| src->vec[1].buffer = src->map_max.data; |
| src->vec[1].size = src->map_max.size; |
| } |
| |
| return TRUE; |
| } |
| |
| static void |
| gst_udpsrc_create_cancellable (GstUDPSrc * src) |
| { |
| GPollFD pollfd; |
| |
| src->cancellable = g_cancellable_new (); |
| src->made_cancel_fd = g_cancellable_make_pollfd (src->cancellable, &pollfd); |
| } |
| |
| static void |
| gst_udpsrc_free_cancellable (GstUDPSrc * src) |
| { |
| if (src->made_cancel_fd) { |
| g_cancellable_release_fd (src->cancellable); |
| src->made_cancel_fd = FALSE; |
| } |
| g_object_unref (src->cancellable); |
| src->cancellable = NULL; |
| } |
| |
| static GstFlowReturn |
| gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf) |
| { |
| GstUDPSrc *udpsrc; |
| GstBuffer *outbuf = NULL; |
| GSocketAddress *saddr = NULL; |
| gint flags = G_SOCKET_MSG_NONE; |
| gboolean try_again; |
| GError *err = NULL; |
| gssize res; |
| gsize offset; |
| |
| udpsrc = GST_UDPSRC_CAST (psrc); |
| |
| if (!gst_udpsrc_ensure_mem (udpsrc)) |
| goto memory_alloc_error; |
| |
| retry: |
| |
| do { |
| gint64 timeout; |
| |
| try_again = FALSE; |
| |
| if (udpsrc->timeout) |
| timeout = udpsrc->timeout / 1000; |
| else |
| timeout = -1; |
| |
| GST_LOG_OBJECT (udpsrc, "doing select, timeout %" G_GINT64_FORMAT, timeout); |
| |
| if (!g_socket_condition_timed_wait (udpsrc->used_socket, G_IO_IN | G_IO_PRI, |
| timeout, udpsrc->cancellable, &err)) { |
| 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)); |
| |
| if (saddr != NULL) { |
| g_object_unref (saddr); |
| saddr = NULL; |
| } |
| |
| res = |
| g_socket_receive_message (udpsrc->used_socket, &saddr, udpsrc->vec, 2, |
| NULL, NULL, &flags, udpsrc->cancellable, &err); |
| |
| if (G_UNLIKELY (res < 0)) { |
| /* G_IO_ERROR_HOST_UNREACHABLE for a UDP socket means that a packet sent |
| * with udpsink generated a "port unreachable" ICMP response. We ignore |
| * that and try again. |
| * On Windows we get G_IO_ERROR_CONNECTION_CLOSED instead */ |
| #if GLIB_CHECK_VERSION(2,44,0) |
| if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_HOST_UNREACHABLE) || |
| g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CONNECTION_CLOSED)) { |
| #else |
| if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_HOST_UNREACHABLE)) { |
| #endif |
| g_clear_error (&err); |
| goto retry; |
| } |
| goto receive_error; |
| } |
| |
| /* remember maximum packet size */ |
| if (res > udpsrc->max_size) |
| udpsrc->max_size = res; |
| |
| outbuf = gst_buffer_new (); |
| |
| /* append first memory chunk to buffer */ |
| gst_buffer_append_memory (outbuf, udpsrc->mem); |
| |
| /* if the packet didn't fit into the first chunk, add second one as well */ |
| if (res > udpsrc->map.size) { |
| gst_buffer_append_memory (outbuf, udpsrc->mem_max); |
| gst_memory_unmap (udpsrc->mem_max, &udpsrc->map_max); |
| udpsrc->vec[1].buffer = NULL; |
| udpsrc->vec[1].size = 0; |
| udpsrc->mem_max = NULL; |
| } |
| |
| /* make sure we allocate a new chunk next time (we do this only here because |
| * we look at map.size to see if the second memory chunk is needed above) */ |
| gst_memory_unmap (udpsrc->mem, &udpsrc->map); |
| udpsrc->vec[0].buffer = NULL; |
| udpsrc->vec[0].size = 0; |
| udpsrc->mem = NULL; |
| |
| offset = udpsrc->skip_first_bytes; |
| |
| if (G_UNLIKELY (offset > 0 && res < offset)) |
| goto skip_error; |
| |
| gst_buffer_resize (outbuf, offset, res - offset); |
| |
| /* 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 packet of %d bytes", (int) res); |
| |
| *buf = GST_BUFFER_CAST (outbuf); |
| |
| return GST_FLOW_OK; |
| |
| /* ERRORS */ |
| memory_alloc_error: |
| { |
| GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL), |
| ("Failed to allocate or map memory")); |
| return GST_FLOW_ERROR; |
| } |
| 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; |
| } |
| receive_error: |
| { |
| 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_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; |
| case PROP_LOOP: |
| udpsrc->loop = 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; |
| case PROP_LOOP: |
| g_value_set_boolean (value, udpsrc->loop); |
| 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; |
| |
| gst_udpsrc_create_cancellable (src); |
| |
| 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); |
| g_socket_set_multicast_loopback (src->used_socket, src->loop); |
| } else { |
| GInetSocketAddress *local_addr; |
| |
| 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; |
| |
| local_addr = |
| G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket, |
| &err)); |
| if (!local_addr) |
| goto getsockname_error; |
| |
| /* See above for the reasons. Without this we would behave different on |
| * Windows and Linux, joining multicast groups below for provided sockets |
| * on Linux but not on Windows |
| */ |
| #ifdef G_OS_WIN32 |
| addr = gst_udpsrc_resolve (src, src->address); |
| if (!addr) |
| goto name_resolve; |
| |
| if (!src->auto_multicast || |
| !g_inet_address_get_is_any (g_inet_socket_address_get_address |
| (local_addr)) |
| || !g_inet_address_get_is_multicast (addr)) { |
| g_object_unref (addr); |
| #endif |
| if (src->addr) |
| g_object_unref (src->addr); |
| src->addr = local_addr; |
| #ifdef G_OS_WIN32 |
| } else { |
| g_object_unref (local_addr); |
| if (src->addr) |
| g_object_unref (src->addr); |
| src->addr = |
| G_INET_SOCKET_ADDRESS (g_inet_socket_address_new (addr, src->port)); |
| g_object_unref (addr); |
| } |
| #endif |
| } |
| |
| { |
| 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"); |
| } |
| } |
| |
| 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); |
| } |
| |
| src->allocator = NULL; |
| gst_allocation_params_init (&src->params); |
| |
| src->max_size = 0; |
| |
| 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"); |
| |
| gst_udpsrc_free_cancellable (src); |
| gst_udpsrc_create_cancellable (src); |
| |
| 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; |
| } |
| |
| gst_udpsrc_reset_memory_allocator (src); |
| |
| gst_udpsrc_free_cancellable (src); |
| |
| 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; |
| } |