filter-apply: Eliminate nested and redundant hook events

In proces(), the do_move() function calls pa_{sink_input,source_output}_set_property().
This triggers a call to {sink_input,source_output}_proplist_cb() which called process()
a second time.

This patch avoids the duplicate and nested call to process() by checking if
PA_PROP_FILTER_APPLY_MOVING is set in {sink_input,source_output}_proplist_cb().

1 files changed, 10 insertions, 0 deletions

diff --git a/src/modules/module-filter-apply.c b/src/modules/module-filter-apply.c
index 6d4475dd1..11d134219 100644
--- a/src/modules/module-filter-apply.c
+++ b/src/modules/module-filter-apply.c
@@ -646,6 +646,11 @@ static pa_hook_result_t sink_input_proplist_cb(pa_core *core, pa_sink_input *i,
     pa_core_assert_ref(core);
     pa_sink_input_assert_ref(i);
 
+    /* Eliminate nested and redundant hook event that is triggered by
+       pa_sink_input_set_property() in do_move(). */
+    if (pa_proplist_gets(i->proplist, PA_PROP_FILTER_APPLY_MOVING))
+        return PA_HOOK_OK;
+
     return process(u, PA_OBJECT(i), true, true);
 }
 
@@ -723,6 +728,11 @@ static pa_hook_result_t source_output_proplist_cb(pa_core *core, pa_source_outpu
     pa_core_assert_ref(core);
     pa_source_output_assert_ref(o);
 
+    /* Eliminate nested and redundant hook event that is triggered by
+       pa_source_output_set_property() in do_move(). */
+    if (pa_proplist_gets(o->proplist, PA_PROP_FILTER_APPLY_MOVING))
+        return PA_HOOK_OK;
+
     return process(u, PA_OBJECT(o), false, true);
 }