From 4142487d1cd8c555e13f156d1cc89f838099db10 Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Fri, 15 Apr 2011 19:56:42 -0400
Subject: [PATCH] ac3enc: return error if frame+exponent bits are too large
 instead of using av_assert2().

This can occur in some very rare cases with low bitrates.
---
 libavcodec/ac3enc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index 00cb047374..47fd9b6a34 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -1052,7 +1052,8 @@ static int cbr_bit_allocation(AC3EncodeContext *s)
     int snr_offset, snr_incr;
 
     bits_left = 8 * s->frame_size - (s->frame_bits + s->exponent_bits);
-    av_assert2(bits_left >= 0);
+    if (bits_left < 0)
+        return AVERROR(EINVAL);
 
     snr_offset = s->coarse_snr_offset << 4;