new PBD::ControllableDescriptor class to encapsulate parsing of binding URIs and speed up lookup at runtime

git-svn-id: svn://localhost/ardour2/branches/3.0@6427 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 150 insertions, 0 deletions

diff --git a/libs/pbd/controllable_descriptor.cc b/libs/pbd/controllable_descriptor.cc
new file mode 100644
index 0000000000..2f84d706b4
--- /dev/null
+++ b/libs/pbd/controllable_descriptor.cc
@@ -0,0 +1,150 @@
+/*
+    Copyright (C) 2009 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.
+*/
+
+#include "pbd/controllable_descriptor.h"
+#include "pbd/strsplit.h"
+#include "pbd/convert.h"
+
+using namespace std;
+using namespace PBD;
+
+int
+ControllableDescriptor::set (const std::string& str)
+{
+	string::size_type first_space = str.find_first_of (" ");
+
+	if (first_space == string::npos) {
+		return -1;
+	}
+
+	string front = str.substr (0, first_space);
+	string back = str.substr (first_space);
+
+	vector<string> path;	
+	split (front, path, '/');
+
+	if (path.size() < 2) {
+		return -1;
+	}
+
+	vector<string> rest;	
+	split (back, rest, ' ');
+
+	if (rest.size() < 1) {
+		return -1;
+	}
+
+	cerr << "Path: " << endl;
+	for (vector<string>::iterator x = path.begin(); x != path.end(); ++x) {
+		cerr << '[' << (*x) << "] ";
+	} 
+	cerr << endl;
+
+	cerr << "Rest: " << endl;
+	for (vector<string>::iterator x = rest.begin(); x != rest.end(); ++x) {
+		cerr << '[' << (*x) << "] ";
+	} 
+	cerr << endl;
+
+	if (path[0] == "route" || path[0] == "rid") {
+
+		_top_level_type = RemoteControlID;
+
+		if (rest[0][0] == 'B') {
+			_banked = true;
+			_rid = atoi (rest[0].substr (1));
+		} else if (isdigit (rest[0][0])) {
+			_banked = false;
+			_rid = atoi (rest[0]);
+		} else {
+			return -1;
+		}
+
+	} else if (path[0] == "bus" || path[0] == "track") {
+
+		_top_level_type = NamedRoute;
+		_top_level_name = rest[0];
+	}
+
+	if (path[1] == "gain") {
+		_subtype = Gain;
+
+	} else if (path[1] == "solo") {
+		_subtype = Solo;
+
+	} else if (path[1] == "mute") {
+		_subtype = Mute;
+
+	} else if (path[1] == "recenable") {
+		_subtype = Recenable;
+
+	} else if (path[1] == "balance") {
+		_subtype = Balance;
+
+	} else if (path[1] == "pan") {
+		_subtype = Pan;
+		_target.push_back (atoi (rest[1]));
+
+	} else if (path[1] == "plugin") {
+		if (path.size() == 3 && rest.size() == 3) {
+			if (path[2] == "parameter") {
+				_subtype = PluginParameter;
+				_target.push_back (atoi (rest[1]));
+				_target.push_back (atoi (rest[2]));
+			} else {
+				return -1;
+			}
+		} else {
+			return -1;
+		}
+	} else if (path[1] == "send") {
+		
+		if (path.size() == 3 && rest.size() == 2) {
+			if (path[2] == "gain") {
+				_subtype = SendGain;
+				_target.push_back (atoi (rest[1]));
+			} else {
+				return -1;
+			}
+		} else {
+			return -1;
+		}
+	}
+	
+	return 0;
+}
+
+uint32_t
+ControllableDescriptor::rid() const
+{
+	if (banked()) {
+		return _rid + _bank_offset;
+	} 		
+
+	return _rid;
+}
+
+uint32_t
+ControllableDescriptor::target (uint32_t n) const
+{
+	if (n < _target.size()) {
+		return _target[n];
+	} 
+	
+	return 0;
+}