From 8c56410d7f3eb45bc8d6391c8dbffab486e5a7ef Mon Sep 17 00:00:00 2001
From: Seven Du <dujinfang@gmail.com>
Date: Wed, 8 Apr 2015 00:12:47 +0800
Subject: [PATCH] FS-7512: slow down in block mod

---
 src/mod/formats/mod_png/mod_png.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mod/formats/mod_png/mod_png.c b/src/mod/formats/mod_png/mod_png.c
index 8720de0226..5e3eeb0138 100644
--- a/src/mod/formats/mod_png/mod_png.c
+++ b/src/mod/formats/mod_png/mod_png.c
@@ -163,6 +163,9 @@ static switch_status_t png_file_read_video(switch_file_handle_t *handle, switch_
 		frame->img = dup;
 		context->sent++;
 	} else {
+		if ((flags && SVR_BLOCK)) {
+			switch_yield(5000);
+		}
 		return SWITCH_STATUS_BREAK;
 	}