From 72d89fd7f93e9ac6d1fbd4aac762a959217b6230 Mon Sep 17 00:00:00 2001
From: Jean-Marc Valin <jmvalin@jmvalin.ca>
Date: Sun, 24 Jul 2016 18:02:37 -0400
Subject: [PATCH] Fixes cap on gain in denormalise_bands()
---
celt/bands.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/celt/bands.c b/celt/bands.c
index 61e2d4ca6..90ac6a229 100644
--- a/celt/bands.c
+++ b/celt/bands.c
@@ -241,10 +241,10 @@ void denormalise_bands(const CELTMode *m, const celt_norm * OPUS_RESTRICT X,
/* Handle extreme gains with negative shift. */
if (shift<0)
{
- /* For shift < -2 we'd be likely to overflow, so we're capping
- the gain here. This shouldn't happen unless the bitstream is
- already corrupted. */
- if (shift < -2)
+ /* For shift <= -2 and g > 16384 we'd be likely to overflow, so we're
+ capping the gain here, which is equivalent to a cap of 18 on lg.
+ This shouldn't trigger unless the bitstream is already corrupted. */
+ if (shift <= -2)
{
g = 16384;
shift = -2;
--
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