From 6c6e4dd139159a7dbf1b85f583804b6334ad88c1 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sat, 22 Feb 2014 22:29:51 +0100
Subject: [PATCH] swr: check that the context for swr_convert() has been
 initialized

Reviewed-by: ubitux
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libswresample/swresample.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libswresample/swresample.c b/libswresample/swresample.c
index e11826eea2..54e06e1d00 100644
--- a/libswresample/swresample.c
+++ b/libswresample/swresample.c
@@ -742,6 +742,11 @@ int swr_convert(struct SwrContext *s, uint8_t *out_arg[SWR_CH_MAX], int out_coun
     AudioData * in= &s->in;
     AudioData *out= &s->out;
 
+    if (!swr_is_initialized(s)) {
+        av_log(s, AV_LOG_ERROR, "Context has not been initialized\n");
+        return AVERROR(EINVAL);
+    }
+
     while(s->drop_output > 0){
         int ret;
         uint8_t *tmp_arg[SWR_CH_MAX];