From 8d03038eb0d5df84df1a134d35ad421c14589e18 Mon Sep 17 00:00:00 2001
From: Douglas Bagnall <douglas@paradise.net.nz>
Date: Fri, 18 Jun 2010 14:34:43 +1200
Subject: [PATCH] wait_for_lines_lock needs to blank its screen

---
 edges.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/edges.c b/edges.c
index 878231e..e26270b 100644
--- a/edges.c
+++ b/edges.c
@@ -1066,7 +1066,8 @@ wait_for_play(GstSparrow *sparrow, sparrow_find_lines_t *fl){
 
 
 static inline void
-wait_for_lines_lock(GstSparrow *sparrow, sparrow_find_lines_t *fl){
+wait_for_lines_lock(GstSparrow *sparrow, sparrow_find_lines_t *fl, guint8 *out){
+  memset(out, 0, sparrow->out.size);
   if (! sparrow->serial){
     jump_state(sparrow, fl, EDGES_NEXT_STATE);
   }
@@ -1085,7 +1086,7 @@ mode_find_edges(GstSparrow *sparrow, GstBuffer *inbuf, GstBuffer *outbuf){
     find_threshold(sparrow, fl, in, out);
     break;
   case EDGES_WAIT_FOR_LINES_LOCK:
-    wait_for_lines_lock(sparrow, fl);
+    wait_for_lines_lock(sparrow, fl, out);
     break;
   case EDGES_FIND_LINES:
     draw_lines(sparrow, fl, in, out);
-- 
2.11.4.GIT