From 364889cf9c1f3c5e816a30d30d714a84765cfc29 Mon Sep 17 00:00:00 2001
From: Jean-Tiare Le Bigot <jtlebi@gmail>
Date: Wed, 25 May 2011 20:12:17 +0200
Subject: [PATCH] Return -1 on invalid input instead of crashing.

---
 libswscale/utils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libswscale/utils.c b/libswscale/utils.c
index 56920a10a3..fada19210b 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -710,7 +710,7 @@ int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange
 
 int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
 {
-    if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
+    if (!c || isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
 
     *inv_table = c->srcColorspaceTable;
     *table     = c->dstColorspaceTable;