private void button1_Click(object sender, EventArgs e)
{
HaffmanGrid.DataSource = FrequencyRecord.GetFrequencyDictionary(InputMessage.Text);
Entropy.Text = "Entropy: " + FrequencyRecord.Entropy;
Avg.Text = "Avg bit/character: " + FrequencyRecord.Avg;
EMLenght.Text = "Encoded message lenght: " + FrequencyRecord.Lenght;
}
private void button2_Click(object sender, EventArgs e)
{
EncodedMessage.Text = "";
BinaryString.Text = "";
ASCIIGrid.DataSource = ASCII.GetASCIIs(FrequencyRecord.GetFrequencyDictionary(InputMessage2.Text));
foreach (var ch in InputMessage2.Text)
{
if (Convert.ToString(ch, 2).Length == 6)
{
BinaryString.Text += "00" + Convert.ToString(Encoding.GetEncoding(CultureInfo.CurrentCulture.TextInfo.ANSICodePage).GetBytes(new char[] { ch })[0], 2);
}
else
{
BinaryString.Text += Convert.ToString(Encoding.GetEncoding(CultureInfo.CurrentCulture.TextInfo.ANSICodePage).GetBytes(new char[] { ch })[0], 2);
}
}
HamGrid.DataSource = Hamm.GetHammings(SplitString(BinaryString.Text, 4));
foreach (var item in Hamm.GetHammings(SplitString(BinaryString.Text, 4)))
{
EncodedMessage.Text += item.Code;
}
}
public static FrequencyRecord[] GetFrequencyDictionary(string text)
{
var result = new List <FrequencyRecord>();
var huffmanTree = new HuffmanTree();
huffmanTree.Build(text);
_entropy = 0;
for (int i = 0; i < huffmanTree.Frequencies.Count; i++)
{
var record = new FrequencyRecord();
record._char = huffmanTree.Frequencies.ElementAt(i).Key;
record._freq = huffmanTree.Frequencies.ElementAt(i).Value;
record._freqPercent = Math.Round(record._freq / ((float)text.Length), 2);
foreach (var item in huffmanTree.EncodeChar(record._char))
{
record._code += (item ? 1 : 0);
}
result.Add(record);
_entropy += Math.Round((-(result[i]._freqPercent * Math.Log(result[i]._freqPercent, 2))), 2);
}
BitArray encoded = huffmanTree.Encode(text);
Console.Write("Encoded: ");
var str = "";
foreach (bool bit in encoded)
{
str += (bit ? 1 : 0);
}
_avg = Math.Round((float)str.Length / (float)text.Length, 2);
_lenght = str.Length;
return(result.ToArray());
}
