1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/lpc.h b/libavcodec/lpc.h
index 0e54f0dfab..6590608693 100644
--- a/libavcodec/lpc.h
+++ b/libavcodec/lpc.h
@@ -92,6 +92,9 @@ int ff_lpc_calc_coefs(LPCContext *s,
                       enum FFLPCType lpc_type, int lpc_passes,
                       int omethod, int max_shift, int zero_shift);
 
+int ff_lpc_calc_ref_coefs(LPCContext *s,
+                          const int32_t *samples, int order, double *ref);
+
 /**
  * Initialize LPCContext.
  */