diff src/synth_graph.hpp @ 0:add35537fdbb tip

Initial import

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/synth_graph.hpp	Thu Aug 25 11:05:55 2011 +0100
@@ -0,0 +1,139 @@
+//  Copyright 2011, Ian Hobson.
+//
+//  This file is part of gpsynth.
+//
+//  gpsynth 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 3 of the License, or
+//  (at your option) any later version.
+//
+//  gpsynth 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 gpsynth in the file COPYING. 
+//  If not, see http://www.gnu.org/licenses/.
+
+// The main synth graph classes
+
+#pragma once
+
+#include "boost/graph/adjacency_list.hpp"
+
+#include <string>
+#include <vector>
+
+namespace synth_graph {
+
+enum NodeType {
+  kUnknown = -1,
+  kCommand,
+  kSpecial,
+  kConstant,
+  kParameter
+};
+  
+enum CommandRate {
+  kAudioRate,
+  kControlRate
+};
+
+// Node, attached to each vertex
+struct Node {
+  int id_;
+  NodeType type_;
+  CommandRate rate_;
+  double constant_value_;
+  
+  Node() 
+  : id_(-1),
+    type_(kUnknown),
+    rate_(kAudioRate),
+    constant_value_(0)
+  {}
+  
+  Node(int id,
+       NodeType type,
+       CommandRate rate = kControlRate)
+  : id_(id),
+    type_(type),
+    rate_(rate),
+    constant_value_(0)
+  {}
+  
+  Node(double constant_value)
+  : id_(-1),
+    type_(kConstant),
+    rate_(kControlRate),
+    constant_value_(constant_value)
+  {}
+};
+
+// Connection, attached to each edge
+struct Connection {
+  // input that the edge is connected to
+  int input_;
+  double weight_;
+  double offset_;
+
+  Connection(int input = -1, double weight = 1, double offset = 0)
+  : input_(input),
+    weight_(weight),
+    offset_(offset)
+  {}
+  
+  // constructor for connection input is irrelevant
+  Connection(double weight, double offset = 0)
+  : input_(0),
+    weight_(weight),
+    offset_(offset)
+  {}
+  
+  bool IsActive() const {
+    return (weight_ != 1) || (offset_ != 0);
+  }
+};
+  
+enum {
+  kFitnessUnrated = -1
+};
+
+// Properties stored with the graph
+struct GraphProperties {
+  // parameter values
+  std::vector<double> parameters_;
+  // graph id
+  int id_;
+  // measured fitness
+  double fitness_;
+  // rendered output path
+  std::string render_path_;
+  // converted graphviz path
+  std::string dot_path_;
+  
+  GraphProperties() 
+  : parameters_(0),
+    fitness_(kFitnessUnrated),
+    id_(0)
+  {}
+};
+
+// defined as bidirectional to allow access to in_edges of a vertex
+// we need to use vecS for storage for to_graphviz
+typedef boost::adjacency_list<boost::vecS,
+                              boost::vecS,
+                              boost::bidirectionalS,
+                              Node,
+                              Connection,
+                              GraphProperties> Graph;
+
+typedef boost::graph_traits<Graph>::vertex_descriptor Vertex;
+typedef boost::graph_traits<Graph>::vertex_iterator VertexIterator;
+typedef boost::graph_traits<Graph>::edge_descriptor Edge;
+typedef boost::graph_traits<Graph>::edge_iterator EdgeIterator;
+typedef boost::graph_traits<Graph>::in_edge_iterator InEdgeIterator;
+
+} // synth_graph namespace
+namespace sg = synth_graph;