[PATCH] sink: Prevent filter sink cycles
David Henningsson
david.henningsson at canonical.com
Fri Mar 23 05:06:27 PDT 2012
BugLink: https://bugs.freedesktop.org/show_bug.cgi?id=44397
Signed-off-by: David Henningsson <david.henningsson at canonical.com>
---
src/pulsecore/sink-input.c | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/src/pulsecore/sink-input.c b/src/pulsecore/sink-input.c
index b8412bd..a8aeda6 100644
--- a/src/pulsecore/sink-input.c
+++ b/src/pulsecore/sink-input.c
@@ -1383,6 +1383,15 @@ pa_bool_t pa_sink_input_may_move(pa_sink_input *i) {
return TRUE;
}
+static pa_bool_t find_filter_sink_input(pa_sink_input *target, pa_sink *s) {
+ while (s && s->input_to_master) {
+ if (s->input_to_master == target)
+ return TRUE;
+ s = s->input_to_master->origin_sink;
+ }
+ return FALSE;
+}
+
/* Called from main context */
pa_bool_t pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest) {
pa_sink_input_assert_ref(i);
@@ -1396,6 +1405,12 @@ pa_bool_t pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest) {
if (!pa_sink_input_may_move(i))
return FALSE;
+ /* Make sure we're not creating a filter sink cycle */
+ if (find_filter_sink_input(i, dest)) {
+ pa_log_debug("Can't connect input to %s, as that would create a cycle.", dest->name);
+ return FALSE;
+ }
+
if (pa_idxset_size(dest->inputs) >= PA_MAX_INPUTS_PER_SINK) {
pa_log_warn("Failed to move sink input: too many inputs per sink.");
return FALSE;
--
1.7.9.1
--------------040809070801080602090307--
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