From 037f0bc0aa581295b3ea8df2b7e3a50b112da58c Mon Sep 17 00:00:00 2001
From: vaclav <vaclav.eksler@usherbrooke.ca>
Date: Fri, 23 Jan 2026 18:51:08 +0100
Subject: [PATCH] FIX_2370_UNUSED_BUFFERS_CORE_ENC

---
 lib_com/options.h          |  1 +
 lib_enc/ivas_core_enc_fx.c | 31 ++++++++++++++++++++++++++++++-
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/lib_com/options.h b/lib_com/options.h
index c7cd38dd8..f1f5baa53 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -107,6 +107,7 @@
 #define FIX_2330_CLANG_18_WARNINGS_REND                 /* FhG: Fix renderer warnings */
 #define FIX_BASOP_2350_HARM_0B_BWE                      /* VA: basop issue 2350: harmonization of the 0b BWE */
 #define FIX_2349_HARM_FIND_UV                           /* VA: basop issue 2349: harmonization of find_uv() function */
+#define FIX_2370_UNUSED_BUFFERS_CORE_ENC                /* VA: basop issue 2370: remove temporary input buffers in core-encoder  */
 
 /* #################### End BE switches ################################## */
 
diff --git a/lib_enc/ivas_core_enc_fx.c b/lib_enc/ivas_core_enc_fx.c
index 3a19ad171..402d4085b 100644
--- a/lib_enc/ivas_core_enc_fx.c
+++ b/lib_enc/ivas_core_enc_fx.c
@@ -628,8 +628,9 @@ ivas_error ivas_core_enc_fx(
      * Postprocessing, BWEs and Updates
      *---------------------------------------------------------------------*/
 
+#ifndef FIX_2370_UNUSED_BUFFERS_CORE_ENC
     Word16 tmp_input_fx[L_FRAME48k], tmp_old_input_fx[L_FRAME48k], q_inp[2];
-
+#endif
     FOR( n = 0; n < n_CoreChannels; n++ )
     {
         st = sts[n];
@@ -644,6 +645,7 @@ ivas_error ivas_core_enc_fx(
             move16();
         }
 
+#ifndef FIX_2370_UNUSED_BUFFERS_CORE_ENC
         Copy( st->input_fx - input_frame, tmp_old_input_fx, input_frame );
         Copy( st->input_fx, tmp_input_fx, input_frame );
         q_inp[0] = st->q_old_inp;
@@ -654,6 +656,7 @@ ivas_error ivas_core_enc_fx(
         move16();
         st->q_old_inp = -1;
         move16();
+#endif
 
         /*---------------------------------------------------------------------*
          * Postprocessing for ACELP/HQ core switching
@@ -694,6 +697,21 @@ ivas_error ivas_core_enc_fx(
          * SWB(FB) BWE encoding
          *---------------------------------------------------------------------*/
 
+#ifdef FIX_2370_UNUSED_BUFFERS_CORE_ENC
+        Word16 q_inp_orig;
+        q_inp_orig = st->q_inp;
+        move16();
+        test();
+        IF( GE_32( input_Fs, 32000 ) && st->hBWE_TD != NULL )
+        {
+            st->q_inp = -1;
+            st->q_old_inp = -1;
+            move16();
+            move16();
+            Scale_sig( st->input_fx - input_frame, shl( input_frame, 1 ), sub( st->q_inp, q_inp_orig ) );
+        }
+#endif
+
         new_swb_speech_fx = new_swb_speech_buffer_fx + STEREO_DFT_OVL_MAX;
         new_swb_speech_fx_16 = new_swb_speech_buffer_fx_16 + STEREO_DFT_OVL_MAX;
         set16_fx( new_swb_speech_buffer_fx_16, 0, L_FRAME48k + STEREO_DFT_OVL_MAX );
@@ -788,6 +806,15 @@ ivas_error ivas_core_enc_fx(
 
         Scale_sig( old_syn_12k8_16k_fx[n], L_FRAME16k, sub( Q1, Q_new[n] ) ); // Q0
 
+#ifdef FIX_2370_UNUSED_BUFFERS_CORE_ENC
+        IF( GE_32( input_Fs, 32000 ) && st->hBWE_TD != NULL )
+        {
+            Scale_sig( st->input_fx, input_frame, sub( q_inp_orig, st->q_inp ) );
+            st->q_inp = q_inp_orig;
+            move16();
+        }
+
+#endif
         /*---------------------------------------------------------------------*
          * SWB DTX/CNG encoding
          *---------------------------------------------------------------------*/
@@ -842,6 +869,7 @@ ivas_error ivas_core_enc_fx(
             }
         }
 
+#ifndef FIX_2370_UNUSED_BUFFERS_CORE_ENC
         Copy( tmp_old_input_fx, st->input_fx - input_frame, input_frame );
         Copy( tmp_input_fx, st->input_fx, input_frame );
         st->q_old_inp = q_inp[0];
@@ -849,6 +877,7 @@ ivas_error ivas_core_enc_fx(
         st->q_inp = q_inp[1];
         move16();
 
+#endif
         /*---------------------------------------------------------------------*
          * Common updates
          *---------------------------------------------------------------------*/
-- 
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