kenmirrors/asterisk
1
0
Fork 0
mirror of https://github.com/asterisk/asterisk.git synced 2025-10-12 15:45:18 +00:00
Code Issues Packages Projects Releases Wiki Activity

bridge: Fix stream topology/participant locking and video misrouting.

Browse Source 
This change fixes a few locking issues and some video misrouting.

1. When accessing the stream topology of a channel the channel lock
must be held to guarantee the topology remains valid.

2. When a channel was joined to a bridge the bridge specific
implementation for stream mapping was not invoked, causing video
to be misrouted for a brief period of time.

ASTERISK-27182

Change-Id: I5d2f779248b84d41c5bb3896bf22ba324b336b03
This commit is contained in:
Joshua Colp
2017-08-06 16:15:34 +00:00
parent 2ba29df200
commit 88c65f7cb6
3 changed files with 51 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
bridges/bridge_softmix.c
View File

@@ -577,13 +577,18 @@ static void sfu_topologies_on_join(struct ast_bridge_channel *joiner, struct ast
struct ast_stream_topology *joiner_video = NULL;
struct ast_stream_topology *existing_video = NULL;
struct ast_bridge_channel *participant;
int res;
joiner_video = ast_stream_topology_alloc();
if (!joiner_video) {
return;
}
if (append_source_streams(joiner_video, ast_channel_name(joiner->chan), ast_channel_get_stream_topology(joiner->chan))) {
ast_channel_lock(joiner->chan);
res = append_source_streams(joiner_video, ast_channel_name(joiner->chan), ast_channel_get_stream_topology(joiner->chan));
ast_channel_unlock(joiner->chan);
if (res) {
goto cleanup;
}
@@ -596,13 +601,18 @@ static void sfu_topologies_on_join(struct ast_bridge_channel *joiner, struct ast
if (participant == joiner) {
continue;
}
if (append_source_streams(existing_video, ast_channel_name(participant->chan),
ast_channel_get_stream_topology(participant->chan))) {
ast_channel_lock(participant->chan);
res = append_source_streams(existing_video, ast_channel_name(participant->chan),
ast_channel_get_stream_topology(participant->chan));
ast_channel_unlock(participant->chan);
if (res) {
goto cleanup;
}
}
ast_channel_lock(joiner->chan);
joiner_topology = ast_stream_topology_clone(ast_channel_get_stream_topology(joiner->chan));
ast_channel_unlock(joiner->chan);
if (!joiner_topology) {
goto cleanup;
}
@@ -617,7 +627,9 @@ static void sfu_topologies_on_join(struct ast_bridge_channel *joiner, struct ast
if (participant == joiner) {
continue;
}
ast_channel_lock(participant->chan);
participant_topology = ast_stream_topology_clone(ast_channel_get_stream_topology(participant->chan));
ast_channel_unlock(participant->chan);
if (!participant_topology) {
goto cleanup;
}
@@ -753,12 +765,16 @@ static int sfu_topologies_on_leave(struct ast_bridge_channel *leaver, struct ast
continue;
}
ast_channel_lock(participant->chan);
remove_destination_streams(participant_topology, ast_channel_name(leaver->chan), ast_channel_get_stream_topology(participant->chan));
ast_channel_unlock(participant->chan);
ast_channel_request_stream_topology_change(participant->chan, participant_topology, NULL);
ast_stream_topology_free(participant_topology);
}
ast_channel_lock(leaver->chan);
remove_destination_streams(leaver_topology, "", ast_channel_get_stream_topology(leaver->chan));
ast_channel_unlock(leaver->chan);
ast_channel_request_stream_topology_change(leaver->chan, leaver_topology, NULL);
ast_stream_topology_free(leaver_topology);
@@ -1657,6 +1673,7 @@ static void map_source_to_destinations(const char *source_stream_name, const cha
}
ast_bridge_channel_lock(participant);
ast_channel_lock(participant->chan);
topology = ast_channel_get_stream_topology(participant->chan);
for (i = 0; i < ast_stream_topology_get_count(topology); ++i) {
@@ -1668,6 +1685,7 @@ static void map_source_to_destinations(const char *source_stream_name, const cha
break;
}
}
ast_channel_unlock(participant->chan);
ast_bridge_channel_unlock(participant);
}
}
@@ -1702,16 +1720,9 @@ static void softmix_bridge_stream_topology_changed(struct ast_bridge *bridge, st
/* First traversal: re-initialize all of the participants' stream maps */
AST_LIST_TRAVERSE(&bridge->channels, participant, entry) {
int size;
ast_bridge_channel_lock(participant);
size = ast_stream_topology_get_count(ast_channel_get_stream_topology(participant->chan));
AST_VECTOR_FREE(&participant->stream_map.to_channel);
AST_VECTOR_FREE(&participant->stream_map.to_bridge);
AST_VECTOR_INIT(&participant->stream_map.to_channel, size);
AST_VECTOR_INIT(&participant->stream_map.to_bridge, size);
AST_VECTOR_RESET(&participant->stream_map.to_channel, AST_VECTOR_ELEM_CLEANUP_NOOP);
AST_VECTOR_RESET(&participant->stream_map.to_bridge, AST_VECTOR_ELEM_CLEANUP_NOOP);
ast_bridge_channel_unlock(participant);
}
@@ -1727,6 +1738,8 @@ static void softmix_bridge_stream_topology_changed(struct ast_bridge *bridge, st
int i;
struct ast_stream_topology *topology;
ast_channel_lock(participant->chan);
topology = ast_channel_get_stream_topology(participant->chan);
for (i = 0; i < ast_stream_topology_get_count(topology); ++i) {
@@ -1766,6 +1779,8 @@ static void softmix_bridge_stream_topology_changed(struct ast_bridge *bridge, st
}
ast_bridge_channel_unlock(participant);
}
ast_channel_unlock(participant->chan);
}
}