Add mising file.

git-svn-id: svn://localhost/ardour2/branches/3.0@5059 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/chan_mapping.cc

@@ -0,0 +1,105 @@
+/*
+    Copyright (C) 2009 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.
+
+    $Id: insert.cc 712 2006-07-28 01:08:57Z drobilla $
+*/
+
+#include <stdint.h>
+#include <iostream>
+#include "ardour/chan_mapping.h"
+
+using namespace std;
+
+namespace ARDOUR {
+
+ChanMapping::ChanMapping(ChanCount identity)
+{
+	if (identity == ChanCount::INFINITE) {
+		return;
+	}
+
+	for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+		for (size_t i = 0; i < identity.get(*t); ++i) {
+			set(*t, i, i);
+		}
+	}
+}
+
+uint32_t
+ChanMapping::get(DataType t, uint32_t from)
+{
+	Mappings::iterator tm = _mappings.find(t);
+	assert(tm != _mappings.end());
+	TypeMapping::iterator m = tm->second.find(from);
+	assert(m != tm->second.end());
+	return m->second;
+}
+
+void
+ChanMapping::set(DataType t, uint32_t from, uint32_t to)
+{
+	assert(t != DataType::NIL);
+	Mappings::iterator tm = _mappings.find(t);
+	if (tm == _mappings.end()) {
+		tm = _mappings.insert(std::make_pair(t, TypeMapping())).first;
+	}
+	tm->second.insert(std::make_pair(from, to));
+}
+
+/** Offset the 'from' field of every mapping for type @a t by @a delta */
+void
+ChanMapping::offset_from(DataType t, int32_t delta)
+{
+	Mappings::iterator tm = _mappings.find(t);
+	if (tm != _mappings.end()) {
+		TypeMapping new_map;
+		for (TypeMapping::iterator m = tm->second.begin(); m != tm->second.end(); ++m) {
+			new_map.insert(make_pair(m->first + delta, m->second));
+		}
+		tm->second = new_map;
+	}
+}
+
+/** Offset the 'to' field of every mapping for type @a t by @a delta */
+void
+ChanMapping::offset_to(DataType t, int32_t delta)
+{
+	Mappings::iterator tm = _mappings.find(t);
+	if (tm != _mappings.end()) {
+		for (TypeMapping::iterator m = tm->second.begin(); m != tm->second.end(); ++m) {
+			m->second += delta;
+		}
+	}
+}
+
+} // namespace ARDOUR
+
+std::ostream& operator<<(std::ostream& o, const ARDOUR::ChanMapping& cm)
+{
+	for (ARDOUR::ChanMapping::Mappings::const_iterator tm = cm.mappings().begin();
+			tm != cm.mappings().end(); ++tm) {
+		o << tm->first.to_string() << endl;
+		for (ARDOUR::ChanMapping::TypeMapping::const_iterator i = tm->second.begin();
+				i != tm->second.end(); ++i) {
+			o << "\t" << i->first << " => " << i->second << endl;
+		}
+	}
+	
+	return o;
+}
+