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diff --git a/libs/ardour/ardour/export_utilities.h b/libs/ardour/ardour/export_utilities.h
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+++ b/libs/ardour/ardour/export_utilities.h
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+/*
+    Copyright (C) 2008 Paul Davis
+    Author: Sakari Bergen
+
+    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_export_utilities_h__
+#define __ardour_export_utilities_h__
+
+#include <samplerate.h>
+
+#include <ardour/graph.h>
+#include <ardour/types.h>
+#include <ardour/ardour.h>
+#include <ardour/export_format_base.h>
+#include <ardour/runtime_functions.h>
+
+namespace ARDOUR
+{
+
+/* Processors */
+
+/* Sample rate converter */
+
+class SampleRateConverter : public GraphSinkVertex<float, float>
+{
+  public:
+	SampleRateConverter (uint32_t channels, nframes_t in_rate, nframes_t out_rate, int quality);
+	~SampleRateConverter ();
+
+  protected:
+	nframes_t process (float * data, nframes_t frames);
+	
+  private:
+	bool           active;
+	uint32_t       channels;
+	
+	nframes_t      leftover_frames;
+	nframes_t      max_leftover_frames;
+	nframes_t      frames_in;
+	nframes_t      frames_out;
+	
+	float *        data_in;
+	float *        leftover_data;
+	
+	float *        data_out;
+	nframes_t      data_out_size;
+	
+	SRC_DATA       src_data;
+	SRC_STATE*     src_state;
+};
+
+/* Sample format converter */
+
+template <typename TOut>
+class SampleFormatConverter : public GraphSinkVertex<float, TOut>
+{
+  public:
+	SampleFormatConverter (uint32_t channels, ExportFormatBase::DitherType type = ExportFormatBase::D_None, int data_width_ = 0);
+	~SampleFormatConverter ();
+	
+	void set_clip_floats (bool yn) { clip_floats = yn; }
+	
+  protected:
+	nframes_t process (float * data, nframes_t frames);
+	
+  private:
+	uint32_t     channels;
+	int          data_width;
+	GDither      dither;
+	nframes_t    data_out_size;
+	TOut *       data_out;
+	
+	bool         clip_floats;
+	
+};
+
+/* Peak reader */
+
+class PeakReader : public GraphSinkVertex<float, float>
+{
+  public:
+	PeakReader (uint32_t channels) : channels (channels), peak (0) {}
+	~PeakReader () {}
+	
+	float get_peak () { return peak; }
+	
+  protected:
+	nframes_t process (float * data, nframes_t frames)
+	{
+		peak = compute_peak (data, channels * frames, peak);
+		return piped_to->write (data, frames);
+	}
+	
+  private:
+	uint32_t    channels;
+	float       peak;
+};
+
+/* Normalizer */
+
+class Normalizer : public GraphSinkVertex<float, float>
+{
+  public:
+	Normalizer (uint32_t channels, float target_dB);
+	~Normalizer ();
+	
+	void set_peak (float peak);
+	
+  protected:
+	nframes_t process (float * data, nframes_t frames);
+	
+  private:
+	uint32_t    channels;
+	
+	bool        enabled;
+	gain_t      target;
+	gain_t      gain;
+};
+
+/* Other */
+
+class NullSink : public GraphSink<float>
+{
+  public:
+	nframes_t write (float * data, nframes_t frames) { return frames; }
+};
+
+
+} // namespace ARDOUR
+
+#endif /* __ardour_export_utilities_h__ */