mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-15 12:56:33 +00:00
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
|
|
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
|
|
* Copyright (C) 2006 Joni Valtanen <joni.valtanen@movial.fi>
|
|
* Copyright (C) 2009 Jarkko Palviainen <jarkko.palviainen@sesca.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <gst/gst.h>
|
|
#include <string.h>
|
|
|
|
#include "gstudpnetutils.h"
|
|
|
|
GST_DEBUG_CATEGORY_EXTERN (gst_udp_debug);
|
|
#define GST_CAT_DEFAULT gst_udp_debug
|
|
|
|
gboolean
|
|
gst_udp_parse_uri (const gchar * uristr, gchar ** host, guint16 * port,
|
|
GPtrArray * source_list)
|
|
{
|
|
GstUri *uri;
|
|
const gchar *protocol;
|
|
|
|
uri = gst_uri_from_string (uristr);
|
|
if (!uri) {
|
|
GST_ERROR ("Invalid URI string %s", uristr);
|
|
return FALSE;
|
|
}
|
|
|
|
/* consider no protocol to be udp:// */
|
|
protocol = gst_uri_get_scheme (uri);
|
|
if (!protocol) {
|
|
GST_ERROR ("error parsing uri %s: no protocol", uristr);
|
|
goto error;
|
|
} else if (g_strcmp0 (protocol, "udp")) {
|
|
GST_ERROR ("error parsing uri %s: wrong protocol (%s != udp)", uristr,
|
|
protocol);
|
|
goto error;
|
|
}
|
|
|
|
*host = g_strdup (gst_uri_get_host (uri));
|
|
if (*host == NULL) {
|
|
GST_ERROR ("Unknown host");
|
|
goto error;
|
|
}
|
|
|
|
GST_DEBUG ("host set to '%s'", *host);
|
|
|
|
*port = gst_uri_get_port (uri);
|
|
|
|
if (source_list) {
|
|
const gchar *source = gst_uri_get_query_value (uri, "multicast-source");
|
|
if (source)
|
|
gst_udp_parse_multicast_source (source, source_list);
|
|
}
|
|
|
|
gst_uri_unref (uri);
|
|
return TRUE;
|
|
|
|
error:
|
|
gst_uri_unref (uri);
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_udp_source_filter_equal_func (gconstpointer a, gconstpointer b)
|
|
{
|
|
return g_strcmp0 ((const gchar *) a, (const gchar *) b) == 0;
|
|
}
|
|
|
|
gboolean
|
|
gst_udp_parse_multicast_source (const gchar * multicast_source,
|
|
GPtrArray * source_list)
|
|
{
|
|
gchar **list;
|
|
guint i;
|
|
gboolean found = FALSE;
|
|
|
|
if (!multicast_source || !source_list)
|
|
return FALSE;
|
|
|
|
GST_DEBUG ("Parsing multicast source \"%s\"", multicast_source);
|
|
|
|
list = g_strsplit_set (multicast_source, "+-", 0);
|
|
|
|
for (i = 0; list[i] != NULL; i++) {
|
|
gchar *prefix;
|
|
gboolean is_positive = FALSE;
|
|
|
|
if (*list[i] == '\0')
|
|
continue;
|
|
|
|
prefix = g_strrstr (multicast_source, list[i]);
|
|
g_assert (prefix);
|
|
|
|
/* Begin without '+' or '-' prefix, assume it's positive filter */
|
|
if (prefix == multicast_source) {
|
|
GST_WARNING ("%s without prefix, assuming that it's positive filter",
|
|
list[i]);
|
|
is_positive = TRUE;
|
|
} else if (*(prefix - 1) == '+') {
|
|
is_positive = TRUE;
|
|
}
|
|
|
|
if (is_positive &&
|
|
!g_ptr_array_find_with_equal_func (source_list, list[i],
|
|
gst_udp_source_filter_equal_func, NULL)) {
|
|
|
|
GST_DEBUG ("Add multicast-source %s", list[i]);
|
|
/* Moves ownership to array */
|
|
g_ptr_array_add (source_list, g_strdup (list[i]));
|
|
found = TRUE;
|
|
}
|
|
}
|
|
|
|
g_strfreev (list);
|
|
|
|
return found;
|
|
}
|