From 7c5dfc174be59afa671a98ec85fe208c528ab64f Mon Sep 17 00:00:00 2001
From: Alex Converse <alex.converse@gmail.com>
Date: Thu, 3 Nov 2011 15:56:37 -0700
Subject: [PATCH] mpeg12enc: Don't set up run-level info for level 0.
run: The number of zero coefficients preceding a non-zero coefficient,
in the scan order. The absolute value of the non-zero coefficient is
called "level".
The run-level code makes illegal reads when trying to set up tables for
nonsense level 0.
---
libavcodec/mpeg12enc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c
index 5dedabd268a..26d26c72176 100644
--- a/libavcodec/mpeg12enc.c
+++ b/libavcodec/mpeg12enc.c
@@ -74,6 +74,8 @@ static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
for(i=0; i<128; i++){
int level= i-64;
int run;
+ if (!level)
+ continue;
for(run=0; run<64; run++){
int len, bits, code;
--
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