From 349ac68863f3031e5bae907dacb9057e43856504 Mon Sep 17 00:00:00 2001
From: Sandesh Venkatesh <sandesh.venkatesh@ittiam.com>
Date: Wed, 23 Apr 2025 17:10:00 +0530
Subject: [PATCH] Fix for 3GPP issue 1487: Basop Encoder: Stereo DTX Front VAD
 Flag Mismatch

Link #1487
---
 lib_enc/nois_est_fx.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/lib_enc/nois_est_fx.c b/lib_enc/nois_est_fx.c
index c8f698da9..2e03f40a9 100644
--- a/lib_enc/nois_est_fx.c
+++ b/lib_enc/nois_est_fx.c
@@ -2253,6 +2253,7 @@ void noise_est_ivas_fx(
     Word16 tmp_enr, tmp_floor; /* constants in Q8 */
     Word16 vad_bwidth_fx;      /* vad ns  control variabel for input bwidth from teh BWD  */
     /* for DTX operation */
+    Word32 L_tmp;
 
     Word16 lim_Etot_fx;    /* Q8 */
     Word32 lim_Etot_sq_fx; /* Q16 */
@@ -3001,7 +3002,7 @@ void noise_est_ivas_fx(
     } */
     IF( *st_harm_cor_cnt == 0 )
     {
-        hNoiseEst->lt_haco_ev_fx = mac_r( 64424509 /* 0.03 in Q32*/, hNoiseEst->lt_haco_ev_fx, 31785 /* 0.97 in Q15*/ ); // Q15
+        hNoiseEst->lt_haco_ev_fx = mac_r( 64424509 /* 0.03 in Q31*/, hNoiseEst->lt_haco_ev_fx, 31785 /* 0.97 in Q15*/ ); // Q15
         move16();
     }
     ELSE
@@ -3558,14 +3559,14 @@ void noise_est_ivas_fx(
     }
     /*st->lt_aEn_zero = 0.2f * (st->aEn==0) + (1-0.2f)  *st->lt_aEn_zero;*/
     /*  y(n+1)=        alpha*tmp            + (1-alpha)*y(n)           */
-    tmp = 0;
-    move16();
+    L_tmp = 0;
+    move32();
     if ( hNoiseEst->aEn == 0 )
     {
-        tmp = 6554; // 0.2 in Q15
-        move16();
+        L_tmp = 429496730; // 0.2 in Q31
+        move32();
     }
-    hNoiseEst->lt_aEn_zero_fx = mac_r( tmp, hNoiseEst->lt_aEn_zero_fx, 26214 /* 0.8 in Q15*/ ); // Q15
+    hNoiseEst->lt_aEn_zero_fx = mac_r( L_tmp, hNoiseEst->lt_aEn_zero_fx, 26214 /* 0.8 in Q15*/ ); // Q15
     move16();
 
     IF( st_fx->element_mode > EVS_MONO )
-- 
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