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-rw-r--r--audio/filter/af.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/audio/filter/af.h b/audio/filter/af.h
index bec0e823fe..579ac271ef 100644
--- a/audio/filter/af.h
+++ b/audio/filter/af.h
@@ -80,6 +80,8 @@ struct af_instance {
// Current audio stream
struct af_stream {
+ int initialized; // 0: no, 1: yes, -1: attempted to, but failed
+
// The first and last filter in the list
struct af_instance *first;
struct af_instance *last;