/// <summary>
/// Creat Huffman tree
/// </summary>
/// <param name="frequencies">Dictionary of frequencies</param>
private void HuffmanTree(IEnumerable <KeyValuePair <char, int> > frequencies)
{
HuffmanQueue <HuffmanNode> priorityQueue = new HuffmanQueue <HuffmanNode>();
foreach (KeyValuePair <char, int> item in frequencies)
{
priorityQueue.Queue(new HuffmanNode {
value = item.Key, probability = GetProbability(item.Value)
}, GetProbability(item.Value));
}
while (priorityQueue.Count > 1)
{
HuffmanNode n1 = priorityQueue.Dequeue();
HuffmanNode n2 = priorityQueue.Dequeue();
HuffmanNode newNode = new HuffmanNode {
left = n1, right = n2, probability = SumOfProbabilities(n1.probability, n2.probability)
};
n1.parent = newNode;
n2.parent = newNode;
priorityQueue.Queue(newNode, newNode.probability);
}
root = priorityQueue.Dequeue();
}