From 8b42b00647df1c0ef5dd81459e355f293a9a28b6 Mon Sep 17 00:00:00 2001
From: Jean-Marc Valin <jmvalin@amazon.com>
Date: Mon, 5 Jun 2023 19:22:27 -0400
Subject: Fix DRED for 10-ms frames

---
 src/opus_decoder.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/opus_decoder.c b/src/opus_decoder.c
index 8f5e9682..d28a052a 100644
--- a/src/opus_decoder.c
+++ b/src/opus_decoder.c
@@ -670,7 +670,7 @@ int opus_decode_native(OpusDecoder *st, const unsigned char *data,
       if (st->lpcnet.blend == 0) needed_feature_frames+=2;
       for (i=0;i<needed_feature_frames;i++) {
          int feature_offset = (needed_feature_frames-i-1 + (dred_offset/(st->Fs/100)-2));
-         if (feature_offset <= 4*dred->nb_latents-1) {
+         if (feature_offset <= 4*dred->nb_latents-1 && feature_offset >= 0) {
            lpcnet_plc_fec_add(&st->lpcnet, dred->fec_features+feature_offset*DRED_NUM_FEATURES);
          } else {
            lpcnet_plc_fec_add(&st->lpcnet, NULL);
-- 
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