/// <summary>
/// Paveikslėlio apdorojimas
/// </summary>
/// <param name="r"></param>
/// <param name="m"></param>
/// <param name="q"></param>
/// <param name="matrix"></param>
/// <param name="expectedLength"></param>
/// <returns></returns>
private static async Task HandlePicture(int r, int m, double q, Matrix matrix, int expectedLength)
{
Console.WriteLine("Select available photos. 0 - bird, 1 - fire, 2 - robot");
var selectedPhoto = Console.ReadLine();
AvailablePhoto photo;
while (!Enum.TryParse(selectedPhoto, out photo) || !Enum.IsDefined(typeof(AvailablePhoto), photo))
{
Console.WriteLine($"'{selectedPhoto}' is not a valid input. Please enter number between 0 and 2.");
selectedPhoto = Console.ReadLine();
}
var basePath = Path.Combine(Environment.CurrentDirectory, "Resources");
var filepath = Path.Combine(basePath, $"{photo}.bmp");
if (!File.Exists(filepath))
{
Console.WriteLine("File does not exist.");
return;
}
// Paveikslėlio skaitymas ir konvertavimas į baitų masyvą.
var(pictureHeader, pictureBody) = await PictureHelper.ReadBmpImageAsync(filepath);
var(initialVectors, addedBits) = ConversionService.ConvertByteArrayToVectors(pictureBody, expectedLength);
// Vektorių kodavimas
var encodedVectors = new List <int[]>();
initialVectors.ForEach(x => encodedVectors.Add(Encoder.EncodeVector(x, matrix)));
// Siuntimas kanalu
var distortedVectors = new List <int[]>();
var distortedPlainVectors = new List <int[]>();
encodedVectors.SkipLast(1).ToList().ForEach(x => distortedVectors.Add(Channel.Send(x, q)));
distortedVectors.Add(Channel.Send(encodedVectors.Last(), q, addedBits));
initialVectors.ForEach(x => distortedPlainVectors.Add(Channel.Send(x, q)));
// Vektorių dekodavimas
var decodedVectors = new List <int[]>();
distortedVectors.ForEach(x => decodedVectors.Add(Decoder.DecodeVector(x, matrix, m, r)));
var decodedByteArr = ConversionService.ConvertVectorsToByteArray(decodedVectors, addedBits);
var plainByteArr = ConversionService.ConvertVectorsToByteArray(distortedPlainVectors, addedBits);
// Paveikslėlių išsaugojimas.
var task1 = PictureHelper.WriteBmpImageAsync(basePath, pictureHeader, decodedByteArr);
var task2 = PictureHelper.WriteBmpImageAsync(basePath, pictureHeader, plainByteArr, false);
Task.WaitAll(task1, task2);
filepath = Path.GetFullPath(basePath);
System.Diagnostics.Process.Start("explorer.exe", filepath);
}
/// <summary>
/// Teksto apdorojimas
/// </summary>
/// <param name="r"></param>
/// <param name="m"></param>
/// <param name="q"></param>
/// <param name="matrix"></param>
/// <param name="expectedLength"></param>
private static void HandleText(int r, int m, double q, Matrix matrix, int expectedLength)
{
Console.WriteLine("Please enter your text");
var text = Console.ReadLine();
Console.WriteLine("Initial text: ".PadRight(20) + text);
// Teksto konvertavimas į baitų masyvą.
var byteArray = Encoding.GetBytes(text);
var(initialVectors, addedBits) = ConversionService.ConvertByteArrayToVectors(byteArray, expectedLength);
// Vektorių kodavimas
var encodedVectors = new List <int[]>();
initialVectors.ForEach(x => encodedVectors.Add(Encoder.EncodeVector(x, matrix)));
// Siuntimas kanalu
var distortedVectors = new List <int[]>();
var distortedPlainVectors = new List <int[]>();
encodedVectors.SkipLast(1).ToList().ForEach(x => distortedVectors.Add(Channel.Send(x, q)));
distortedVectors.Add(Channel.Send(encodedVectors.Last(), q, addedBits));
initialVectors.ForEach(x => distortedPlainVectors.Add(Channel.Send(x, q)));
// Vektorių dekodavimas
var decodedVectors = new List <int[]>();
distortedVectors.ForEach(x => decodedVectors.Add(Decoder.DecodeVector(x, matrix, m, r)));
var decodedText = Encoding.GetString(ConversionService.ConvertVectorsToByteArray(decodedVectors, addedBits));
var decodedTextWithoutEncoding = Encoding.GetString(ConversionService.ConvertVectorsToByteArray(distortedPlainVectors, addedBits));
// Replacing carriage return and new line char.
decodedText = decodedText.Replace('\r', 'r');
decodedText = decodedText.Replace('\n', 'n');
decodedTextWithoutEncoding = decodedTextWithoutEncoding.Replace('\r', 'r');
decodedTextWithoutEncoding = decodedTextWithoutEncoding.Replace('\n', 'n');
Console.WriteLine("Without encoding: ".PadRight(20) + decodedTextWithoutEncoding);
Console.WriteLine("Decoded text: ".PadRight(20) + decodedText);
}
