1 files changed, 126 insertions, 0 deletions
diff --git a/libs/ardour/ardour/chan_count.h b/libs/ardour/ardour/chan_count.h
new file mode 100644
index 0000000000..986ef76e25
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+++ b/libs/ardour/ardour/chan_count.h
@@ -0,0 +1,126 @@
+/*
+    Copyright (C) 2006 Paul Davis 
+	Author: Dave Robillard
+
+    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_chan_count_h__
+#define __ardour_chan_count_h__
+
+#include <ardour/data_type.h>
+#include <cassert>
+
+namespace ARDOUR {
+
+
+/** A count of channels, possibly with many types.
+ *
+ * Operators are defined so this may safely be used as if it were a simple
+ * (single-typed) integer count of channels.
+ */
+class ChanCount {
+public:
+	ChanCount() { reset(); }
+	
+	// Convenience constructor for making single-typed streams (stereo, mono, etc)
+	ChanCount(DataType type, uint32_t channels)
+	{
+		reset();
+		set(type, channels);
+	}
+
+	void reset()
+	{
+		for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+			_counts[*t] = 0;
+		}
+	}
+	
+	void     set(DataType t, uint32_t count) { assert(t != DataType::NIL); _counts[t] = count; }
+	uint32_t get(DataType t) const { assert(t != DataType::NIL); return _counts[t]; }
+	
+	inline uint32_t n_audio() const { return _counts[DataType::AUDIO]; }
+	inline void set_audio(uint32_t a) { _counts[DataType::AUDIO] = a; }
+	
+	inline uint32_t n_midi()  const { return _counts[DataType::MIDI]; }
+	inline void set_midi(uint32_t m) { _counts[DataType::MIDI] = m; }
+	
+	uint32_t n_total() const
+	{
+		uint32_t ret = 0;
+		for (uint32_t i=0; i < DataType::num_types; ++i)
+			ret += _counts[i];
+
+		return ret;
+	}
+
+	bool operator==(const ChanCount& other) const
+	{
+		for (uint32_t i=0; i < DataType::num_types; ++i)
+			if (_counts[i] != other._counts[i])
+				return false;
+
+		return true;
+	}
+	
+	bool operator!=(const ChanCount& other) const
+	{
+		return ! (*this == other);
+	}
+
+	bool operator<(const ChanCount& other) const
+	{
+		for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+			if (_counts[*t] > other._counts[*t]) {
+				return false;
+			}
+		}
+		return (*this != other);
+	}
+
+	bool operator<=(const ChanCount& other) const
+	{
+		return ( (*this < other) || (*this == other) );
+	}
+	
+	bool operator>(const ChanCount& other) const
+	{
+		for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+			if (_counts[*t] < other._counts[*t]) {
+				return false;
+			}
+		}
+		return (*this != other);
+	}
+
+	bool operator>=(const ChanCount& other) const
+	{
+		return ( (*this > other) || (*this == other) );
+	}
+
+	static const ChanCount INFINITE;
+	static const ChanCount ZERO;
+
+private:
+	
+	uint32_t _counts[DataType::num_types];
+};
+
+
+} // namespace ARDOUR
+
+#endif // __ardour_chan_count_h__
+