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diff --git a/cinelerra-5.1/plugins/blur/blur.h b/cinelerra-5.1/plugins/blur/blur.h
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+++ b/cinelerra-5.1/plugins/blur/blur.h
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+
+/*
+ * CINELERRA
+ * Copyright (C) 2010 Adam Williams <broadcast at earthling dot net>
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * 
+ */
+
+#ifndef BLUR_H
+#define BLUR_H
+
+class BlurMain;
+class BlurEngine;
+
+#define MAXRADIUS 100
+
+#include "blurwindow.inc"
+#include "bchash.inc"
+#include "mutex.h"
+#include "overlayframe.h"
+#include "pluginvclient.h"
+#include "thread.h"
+#include "vframe.inc"
+
+typedef struct
+{
+	double r;
+    double g;
+    double b;
+    double a;
+} pixel_f;
+
+class BlurConfig
+{
+public:
+	BlurConfig();
+
+	int equivalent(BlurConfig &that);
+	void copy_from(BlurConfig &that);
+	void interpolate(BlurConfig &prev, 
+		BlurConfig &next, 
+		int64_t prev_frame, 
+		int64_t next_frame, 
+		int64_t current_frame);
+
+	int vertical;
+	int horizontal;
+	int radius;
+	int a, r ,g ,b;
+	int a_key;
+};
+
+class BlurMain : public PluginVClient
+{
+public:
+	BlurMain(PluginServer *server);
+	~BlurMain();
+
+// required for all realtime plugins
+	int process_buffer(VFrame *frame,
+		int64_t start_position,
+		double frame_rate);
+	int is_realtime();
+	void save_data(KeyFrame *keyframe);
+	void read_data(KeyFrame *keyframe);
+	void update_gui();
+
+	PLUGIN_CLASS_MEMBERS(BlurConfig)
+
+	int need_reconfigure;
+
+private:
+	BlurEngine **engine;
+	OverlayFrame *overlayer;
+	VFrame *input_frame;
+};
+
+
+class BlurConstants
+{
+public:
+    double n_p[5], n_m[5];
+    double d_p[5], d_m[5];
+    double bd_p[5], bd_m[5];
+};
+
+class BlurEngine : public Thread
+{
+public:
+	BlurEngine(BlurMain *plugin);
+	~BlurEngine();
+
+	void run();
+	void set_range(int start_y, 
+		int end_y,
+		int start_x,
+		int end_x);
+	int start_process_frame(VFrame *frame);
+	int wait_process_frame();
+
+// parameters needed for blur
+	int get_constants(BlurConstants *ptr, double std_dev);
+	int reconfigure(BlurConstants *constants, double alpha);
+	int transfer_pixels(pixel_f *src1, 
+		pixel_f *src2, 
+		pixel_f *src, 
+		double *radius,
+		pixel_f *dest, 
+		int size);
+	int multiply_alpha(pixel_f *row, int size);
+	int separate_alpha(pixel_f *row, int size);
+	int blur_strip3(int &size);
+	int blur_strip4(int &size);
+
+	int color_model;
+	double vmax;
+	pixel_f *val_p, *val_m;
+	double *radius;
+	BlurConstants forward_constants;
+	BlurConstants reverse_constants;
+	pixel_f *src, *dst;
+    pixel_f initial_p;
+    pixel_f initial_m;
+	int terms;
+	BlurMain *plugin;
+// A margin is introduced between the input and output to give a seemless transition between blurs
+	int start_y, start_x;
+	int end_y, end_x;
+	int last_frame;
+	int do_horizontal;
+// Detect changes in alpha for alpha radius mode
+	double prev_forward_radius, prev_reverse_radius;
+	Mutex input_lock, output_lock;
+	VFrame *frame;
+};
+
+#endif