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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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3374f2f44d
Adding "multicast-source" property to support Source Specific Muliticast
RFC 4604. The source can be multiple address with '+' (for positive
filter) or '-' (negative filter) prefix, or URI query can be used.
Note that negative filter is not implemented yet and it will be
ignored
Example:
gst-launch-1.0 uridecodebin \
uri=udp://{ADDRESS}:PORT?multicast-source=+SOURCE0+SOURCE1
Inspired by:
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2620
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3485>
136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
/* GStreamer UDP network utility functions
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* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
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* Copyright (C) 2006 Joni Valtanen <joni.valtanen@movial.fi>
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* Copyright (C) 2009 Jarkko Palviainen <jarkko.palviainen@sesca.com>
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <string.h>
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#include "gstudpnetutils.h"
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GST_DEBUG_CATEGORY_EXTERN (gst_udp_debug);
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#define GST_CAT_DEFAULT gst_udp_debug
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gboolean
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gst_udp_parse_uri (const gchar * uristr, gchar ** host, guint16 * port,
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GPtrArray * source_list)
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{
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GstUri *uri;
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const gchar *protocol;
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uri = gst_uri_from_string (uristr);
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if (!uri) {
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GST_ERROR ("Invalid URI string %s", uristr);
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return FALSE;
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}
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/* consider no protocol to be udp:// */
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protocol = gst_uri_get_scheme (uri);
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if (!protocol) {
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GST_ERROR ("error parsing uri %s: no protocol", uristr);
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goto error;
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} else if (g_strcmp0 (protocol, "udp")) {
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GST_ERROR ("error parsing uri %s: wrong protocol (%s != udp)", uristr,
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protocol);
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goto error;
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}
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*host = g_strdup (gst_uri_get_host (uri));
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if (*host == NULL) {
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GST_ERROR ("Unknown host");
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goto error;
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}
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GST_DEBUG ("host set to '%s'", *host);
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*port = gst_uri_get_port (uri);
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if (source_list) {
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const gchar *source = gst_uri_get_query_value (uri, "multicast-source");
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if (source)
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gst_udp_parse_multicast_source (source, source_list);
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}
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gst_uri_unref (uri);
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return TRUE;
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error:
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gst_uri_unref (uri);
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return FALSE;
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}
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static gboolean
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gst_udp_source_filter_equal_func (gconstpointer a, gconstpointer b)
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{
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return g_strcmp0 ((const gchar *) a, (const gchar *) b) == 0;
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}
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gboolean
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gst_udp_parse_multicast_source (const gchar * multicast_source,
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GPtrArray * source_list)
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{
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gchar **list;
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guint i;
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gboolean found = FALSE;
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if (!multicast_source || !source_list)
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return FALSE;
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GST_DEBUG ("Parsing multicast source \"%s\"", multicast_source);
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list = g_strsplit_set (multicast_source, "+-", 0);
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for (i = 0; list[i] != NULL; i++) {
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gchar *prefix;
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gboolean is_positive = FALSE;
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if (*list[i] == '\0')
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continue;
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prefix = g_strrstr (multicast_source, list[i]);
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g_assert (prefix);
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/* Begin without '+' or '-' prefix, assume it's positive filter */
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if (prefix == multicast_source) {
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GST_WARNING ("%s without prefix, assuming that it's positive filter",
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list[i]);
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is_positive = TRUE;
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} else if (*(prefix - 1) == '+') {
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is_positive = TRUE;
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}
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if (is_positive &&
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!g_ptr_array_find_with_equal_func (source_list, list[i],
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gst_udp_source_filter_equal_func, NULL)) {
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GST_DEBUG ("Add multicast-source %s", list[i]);
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/* Moves ownership to array */
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g_ptr_array_add (source_list, g_strdup (list[i]));
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found = TRUE;
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}
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}
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g_strfreev (list);
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return found;
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}
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