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diff --git a/cinelerra-5.1/plugins/histogram/histogramconfig.h b/cinelerra-5.1/plugins/histogram/histogramconfig.h
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+++ b/cinelerra-5.1/plugins/histogram/histogramconfig.h
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+
+/*
+ * CINELERRA
+ * Copyright (C) 1997-2011 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 HISTOGRAMCONFIG_H
+#define HISTOGRAMCONFIG_H
+
+
+#include "histogram.inc"
+#include "histogramconfig.inc"
+#include "linklist.h"
+#include <stdint.h>
+
+
+class HistogramConfig
+{
+public:
+	HistogramConfig();
+
+	int equivalent(HistogramConfig &that);
+	void copy_from(HistogramConfig &that);
+	void interpolate(HistogramConfig &prev, 
+		HistogramConfig &next, 
+		int64_t prev_frame, 
+		int64_t next_frame, 
+		int64_t current_frame);
+// Used by constructor and reset button
+	void reset(int do_mode);
+	void reset_points(int colors_only);
+	void boundaries();
+	void dump();
+
+// Range 0 - 1.0
+// Input points
+	float low_input[HISTOGRAM_MODES];
+	float high_input[HISTOGRAM_MODES];
+	float gamma[HISTOGRAM_MODES];
+// Output points
+	float low_output[HISTOGRAM_MODES];
+	float high_output[HISTOGRAM_MODES];
+
+	int automatic;
+	int automatic_v;
+	float threshold;
+	int plot;
+	int split;
+};
+
+
+#endif
+
+
+