rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 77 insertions, 0 deletions

diff --git a/libs/ardour/ardour/meter.h b/libs/ardour/ardour/meter.h
new file mode 100644
index 0000000000..e19c0a51ca
--- /dev/null
+++ b/libs/ardour/ardour/meter.h
@@ -0,0 +1,77 @@
+/*
+    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 <ardour/processor.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 Processor {
+public:
+	PeakMeter(Session& s) : Processor(s, "meter", PreFader) {}
+
+	void reset ();
+	void reset_max ();
+	
+	bool configure_io (ChanCount in, ChanCount out);
+	
+	/** Compute peaks */
+	void run_in_place (BufferSet& bufs, nframes_t start_frame, nframes_t end_frame, nframes_t nframes, nframes_t offset);
+	
+	float peak_power (uint32_t n) { 
+		if (n < _visible_peak_power.size()) {
+			return _visible_peak_power[n];
+		} else {
+			return minus_infinity();
+		}
+	}
+	
+	float max_peak_power (uint32_t n) {
+		if (n < _max_peak_power.size()) {
+			return _max_peak_power[n];
+		} else {
+			return minus_infinity();
+		}
+	}
+
+private:
+	
+	friend class IO;
+	void meter();
+
+	std::vector<float> _peak_power;
+	std::vector<float> _visible_peak_power;
+	std::vector<float> _max_peak_power;
+};
+
+
+} // namespace ARDOUR
+
+#endif // __ardour_meter_h__