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media: don't add udp addresses multiple times

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Keep track of the udp addresses we added to udpsink and never add the same udp
destination twice. This avoids duplicate packets when using multicast.
This commit is contained in:
Wim Taymans 2010-08-20 13:09:12 +02:00
parent af732fa749
commit 7c0f8a77ec
2 changed files with 86 additions and 6 deletions
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91
gst/rtsp-server/rtsp-media.c
View file

@ -1527,6 +1527,89 @@ default_unprepare (GstRTSPMedia * media)
return TRUE;
}
typedef struct {
gint count;
gchar *dest;
gint min, max;
} RTSPDestination;
static gint
dest_compare (RTSPDestination * a, RTSPDestination * b)
{
if ((a->min == b->min) && (a->max == b->max) && (strcmp (a->dest, b->dest) == 0))
return 0;
return 1;
}
/* FIXME, udpsink should do this for us */
static void
add_udp_destination (GstRTSPMedia *media, GstRTSPMediaStream *stream,
gchar *dest, gint min, gint max)
{
RTSPDestination fdest;
RTSPDestination *ndest;
GList *find;
fdest.dest = dest;
fdest.min = min;
fdest.max = max;
/* first see if we already added this destination */
find = g_list_find_custom (stream->destinations, &fdest, (GCompareFunc) dest_compare);
if (find) {
ndest = (RTSPDestination *) find->data;
GST_INFO ("already streaming to %s:%d-%d with %d clients", dest, min, max, ndest->count);
ndest->count++;
} else {
GST_INFO ("adding %s:%d-%d", dest, min, max);
g_signal_emit_by_name (stream->udpsink[0], "add", dest, min, NULL);
g_signal_emit_by_name (stream->udpsink[1], "add", dest, max, NULL);
ndest = g_slice_new (RTSPDestination);
ndest->count = 1;
ndest->dest = g_strdup (dest);
ndest->min = min;
ndest->max = max;
stream->destinations = g_list_prepend (stream->destinations, ndest);
}
}
static void
remove_udp_destination (GstRTSPMedia *media, GstRTSPMediaStream *stream,
gchar *dest, gint min, gint max)
{
RTSPDestination fdest;
RTSPDestination *ndest;
GList *find;
fdest.dest = dest;
fdest.min = min;
fdest.max = max;
/* first see if we already added this destination */
find = g_list_find_custom (stream->destinations, &fdest, (GCompareFunc) dest_compare);
if (!find)
return;
ndest = (RTSPDestination *) find->data;
if (--ndest->count == 0) {
GST_INFO ("removing %s:%d-%d", dest, min, max);
g_signal_emit_by_name (stream->udpsink[0], "remove", dest, min, NULL);
g_signal_emit_by_name (stream->udpsink[1], "remove", dest, max, NULL);
stream->destinations = g_list_delete_link (stream->destinations, find);
g_free (ndest->dest);
g_slice_free (RTSPDestination, ndest);
} else {
GST_INFO ("still streaming to %s:%d-%d with %d clients", dest, min, max, ndest->count);
}
}
/**
* gst_rtsp_media_set_state:
* @media: a #GstRTSPMedia
@ -1610,16 +1693,12 @@ gst_rtsp_media_set_state (GstRTSPMedia * media, GstState state,
}
if (add && !tr->active) {
GST_INFO ("adding %s:%d-%d", dest, min, max);
g_signal_emit_by_name (stream->udpsink[0], "add", dest, min, NULL);
g_signal_emit_by_name (stream->udpsink[1], "add", dest, max, NULL);
add_udp_destination (media, stream, dest, min, max);
stream->transports = g_list_prepend (stream->transports, tr);
tr->active = TRUE;
media->active++;
} else if (remove && tr->active) {
GST_INFO ("removing %s:%d-%d", dest, min, max);
g_signal_emit_by_name (stream->udpsink[0], "remove", dest, min, NULL);
g_signal_emit_by_name (stream->udpsink[1], "remove", dest, max, NULL);
remove_udp_destination (media, stream, dest, min, max);
stream->transports = g_list_remove (stream->transports, tr);
tr->active = FALSE;
media->active--;

1
gst/rtsp-server/rtsp-media.h
View file

@ -137,6 +137,7 @@ struct _GstRTSPMediaStream {
/* transports we stream to */
GList *transports;
GList *destinations;
};
/**