1 files changed, 66 insertions, 0 deletions
diff --git a/libs/ardour/ardour/meter.h b/libs/ardour/ardour/meter.h
new file mode 100644
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+++ b/libs/ardour/ardour/meter.h
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+/*
+    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_meter_h__
+#define __ardour_meter_h__
+
+#include <vector>
+#include <ardour/types.h>
+#include <pbd/fastlog.h>
+
+namespace ARDOUR {
+
+class BufferSet;
+class ChanCount;
+class Session;
+
+
+/** Meters peaks on the input and stores them for access.
+ */
+class PeakMeter {
+public:
+	PeakMeter(Session& s) : _session(s) {}
+
+	void setup (const ChanCount& in);
+	void reset ();
+
+	/** Compute peaks */
+	void run (BufferSet& bufs, jack_nframes_t nframes, jack_nframes_t offset=0);
+	
+	float peak_power (uint32_t n) { 
+		if (n < _visible_peak_power.size()) {
+			return _visible_peak_power[n];
+		} else {
+			return minus_infinity();
+		}
+	}
+
+private:
+	
+	friend class IO;
+	void meter();
+
+	Session&           _session;
+	std::vector<float> _peak_power;
+	std::vector<float> _visible_peak_power;
+};
+
+
+} // namespace ARDOUR
+
+#endif // __ardour_meter_h__