From bd10f6e1492492b0dfddc7dd8773e782ccea6daf Mon Sep 17 00:00:00 2001
From: Laurent Aimar <fenrir@via.ecp.fr>
Date: Tue, 2 Sep 2008 23:09:14 +0000
Subject: [PATCH] Prevent a division by 0 in the g726 decoder when the
 configured samplerate is 0. patch by Laurent Aimar, fenrir via.ecp fr

Originally committed as revision 15160 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/g726.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libavcodec/g726.c b/libavcodec/g726.c
index 463d993137..a769c19d23 100644
--- a/libavcodec/g726.c
+++ b/libavcodec/g726.c
@@ -301,7 +301,14 @@ static int16_t g726_encode(G726Context* c, int16_t sig)
 static av_cold int g726_init(AVCodecContext * avctx)
 {
     G726Context* c = avctx->priv_data;
-    unsigned int index= (avctx->bit_rate + avctx->sample_rate/2) / avctx->sample_rate - 2;
+    unsigned int index;
+
+    if (avctx->sample_rate <= 0) {
+        av_log(avctx, AV_LOG_ERROR, "Samplerate is invalid\n");
+        return -1;
+    }
+
+    index = (avctx->bit_rate + avctx->sample_rate/2) / avctx->sample_rate - 2;
 
     if (avctx->bit_rate % avctx->sample_rate && avctx->codec->encode) {
         av_log(avctx, AV_LOG_ERROR, "Bitrate - Samplerate combination is invalid\n");