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-rw-r--r--audio/filter/af_sub.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/audio/filter/af_sub.c b/audio/filter/af_sub.c
index 742d2e7413..5642c4573d 100644
--- a/audio/filter/af_sub.c
+++ b/audio/filter/af_sub.c
@@ -46,8 +46,8 @@ typedef struct{
} biquad_t;
// S-parameters for designing 4th order Butterworth filter
-static biquad_t sp[2] = {{{1.0,0.0,0.0},{1.0,0.765367,1.0}},
- {{1.0,0.0,0.0},{1.0,1.847759,1.0}}};
+static const biquad_t sp[2] = {{{1.0,0.0,0.0},{1.0,0.765367,1.0}},
+ {{1.0,0.0,0.0},{1.0,1.847759,1.0}}};
// Data for specific instances of this filter
typedef struct af_sub_s
@@ -128,7 +128,7 @@ static int af_open(struct af_instance* af){
}
#define OPT_BASE_STRUCT af_sub_t
-struct af_info af_info_sub = {
+const struct af_info af_info_sub = {
.info = "Audio filter for adding a sub-base channel",
.name = "sub",
.flags = AF_FLAGS_NOT_REENTRANT,