From 449c37e9ea176c018212eea53791d6703f5d71ce Mon Sep 17 00:00:00 2001
From: "Christian R. Helmrich" <c.helmrich@ecodis.de>
Date: Mon, 13 Apr 2020 01:00:16 +0200
Subject: [PATCH] fix HF TNS bug

---
 src/lib/exhaleEnc.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/exhaleEnc.cpp b/src/lib/exhaleEnc.cpp
index cbd2f56..0a6eaa8 100644
--- a/src/lib/exhaleEnc.cpp
+++ b/src/lib/exhaleEnc.cpp
@@ -433,7 +433,7 @@ unsigned ExhaleEncoder::applyTnsToWinGroup (TnsData& tnsData, SfbGroupData& grpD
 
       while (grpSO[tnsStartSfb] < tnsStartOffs) tnsStartSfb++;  // start band for TNS filter
     }
-    tnsMaxBands = __min (tnsMaxBands, maxSfb);
+    if ((tnsMaxBands = __min (tnsMaxBands, maxSfb)) <= tnsStartSfb) tnsStartSfb = numSwbWin;
 
     if ((tnsData.filterLength[0] = __max (0, numSwbWin - tnsStartSfb)) > 0)
     {