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-rw-r--r--libaf/control.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/libaf/control.h b/libaf/control.h
index aa51046dbd..dcbb2ddba0 100644
--- a/libaf/control.h
+++ b/libaf/control.h
@@ -218,4 +218,10 @@ typedef struct af_control_ext_s{
// ExtraStereo Multiplier
#define AF_CONTROL_ES_MUL 0x00002100 | AF_CONTROL_FILTER_SPECIFIC
+
+// Center
+
+// Channel number which to inster the filtered data, arg in int*
+#define AF_CONTROL_CENTER_CH 0x00002200 | AF_CONTROL_FILTER_SPECIFIC
+
#endif /*__af_control_h */