From 31bc6b454994d7b7a99a30876c0427c07c5885e3 Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Tue, 3 Jun 2008 23:34:26 +0000
Subject: prevent crash when dba params are invalid

Originally committed as revision 13653 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/ac3.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'libavcodec/ac3.c')

diff --git a/libavcodec/ac3.c b/libavcodec/ac3.c
index a1415a570c..132ea0f8b5 100644
--- a/libavcodec/ac3.c
+++ b/libavcodec/ac3.c
@@ -157,8 +157,8 @@ void ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd,
     if (dba_mode == DBA_REUSE || dba_mode == DBA_NEW) {
         int band, seg, delta;
         band = 0;
-        for (seg = 0; seg < dba_nsegs; seg++) {
-            band += dba_offsets[seg];
+        for (seg = 0; seg < FFMIN(8, dba_nsegs); seg++) {
+            band = FFMIN(49, band + dba_offsets[seg]);
             if (dba_values[seg] >= 4) {
                 delta = (dba_values[seg] - 3) << 7;
             } else {
-- 
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