First commit on FFT analysis window. Still some functionality missing,

but it's mostly done.


git-svn-id: svn://localhost/trunk/ardour2@383 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 90 insertions, 0 deletions

diff --git a/gtk2_ardour/fft_graph.h b/gtk2_ardour/fft_graph.h
new file mode 100644
index 0000000000..80c78180a6
--- /dev/null
+++ b/gtk2_ardour/fft_graph.h
@@ -0,0 +1,90 @@
+/*
+    Copyright (C) 2006 Paul Davis
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef __ardour_fft_graph_h
+#define __ardour_fft_graph_h
+
+#include <ardour/types.h>
+#include <fftw3.h>
+
+#include <gtkmm/drawingarea.h>
+#include <gtkmm/treemodel.h>
+#include <gdkmm/color.h>
+
+#include <glibmm/refptr.h>
+
+#include <string>
+
+#include "fft_result.h"
+
+class AnalysisWindow;
+
+class FFTGraph : public Gtk::DrawingArea
+{
+	public:
+		
+		FFTGraph(int windowSize);
+		~FFTGraph();
+
+		void set_analysis_window(AnalysisWindow *a_window);
+		
+		int windowSize() const { return _windowSize; }
+		void setWindowSize(int windowSize);
+
+		void redraw();
+		bool on_expose_event (GdkEventExpose* event);
+		
+		void on_size_request(Gtk::Requisition* requisition);
+		void on_size_allocate(Gtk::Allocation alloc);
+		FFTResult *prepareResult(Gdk::Color color, std::string trackname);
+		
+	private:
+
+		void setWindowSize_internal(int windowSize);
+
+		void draw_scales(Glib::RefPtr<Gdk::Window> window);
+		
+		static const int scaleWidth = 512;
+		static const int scaleHeight = 420;
+
+		static const int h_margin = 20;
+		static const int v_margin = 20;
+
+		int width;
+		int height;
+		
+		void analyze(float *window, float *composite);
+		int _windowSize;
+		int _dataSize;
+
+		Glib::RefPtr<Pango::Layout> layout;
+		Glib::RefPtr<Gdk::GC> graph_gc;
+		AnalysisWindow *_a_window;
+
+		fftwf_plan _plan;
+
+		float *_out;
+		float *_in;
+		float *_hanning;
+		int *_logScale;
+
+	friend class FFTResult;
+};
+
+#endif /* __ardour_fft_graph_h */