public WAVHeader ReadWAVFile()
{
WAVHeader wavHeader = new WAVHeader();
using (FileStream fs = File.Open(this.Filename, FileMode.Open))
{
BinaryReader binaryReader = new BinaryReader(fs);
wavHeader.ChunkId = this.FormatValue(binaryReader.ReadInt32());
wavHeader.ChunkSize = binaryReader.ReadUInt32();
wavHeader.Format = this.FormatValue(binaryReader.ReadInt32());
wavHeader.Subchunk1Id = this.FormatValue(binaryReader.ReadInt32());
wavHeader.Subchunk1Size = binaryReader.ReadInt32();
wavHeader.AudioFormat = binaryReader.ReadInt16();
wavHeader.NumChannels = binaryReader.ReadInt16();
wavHeader.SampleRate = binaryReader.ReadInt32();
wavHeader.ByteRate = binaryReader.ReadInt32() * 8;
wavHeader.BlockAlign = binaryReader.ReadInt16();
wavHeader.BitPerSample = binaryReader.ReadInt16();
wavHeader.Subchunk2Id = this.FormatValue(binaryReader.ReadInt32());
wavHeader.Subchunk2Size = binaryReader.ReadInt32();
byte[] readDataBytes = isEncoded ? binaryReader.ReadBytes(wavHeader.Subchunk2Size * 4) : binaryReader.ReadBytes(wavHeader.Subchunk2Size);;
WAVData wavData = new WAVData(readDataBytes, wavHeader.Subchunk2Size);
wavHeader.WavData = wavData;
}
return(wavHeader);
}
/**
* Loads specified file
*/
private void BtnLoadWAV_Click(object sender, RoutedEventArgs e)
{
var fileContent = string.Empty;
var filePath = string.Empty;
using (OpenFileDialog openFileDialog = new OpenFileDialog())
{
openFileDialog.InitialDirectory = "c:\\";
openFileDialog.Filter = "wav files (*.wav)|*.wav";
openFileDialog.FilterIndex = 2;
openFileDialog.RestoreDirectory = true;
if (openFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
filePath = openFileDialog.FileName;
wavHeader = new WAVReader(filePath).ReadWAVFile();
AddToList(wavHeader);
DFT dft = new DFT(wavHeader.WavData.ChannelData);
Point[] points = dft.FourierData(wavHeader.SampleRate);
dft.FourierData(wavHeader.SampleRate);
List <double> dataFourier = new List <double>();
this.LoadChartData(points);
}
}
}
/**
* Makes an array of 4 bytes from ciphered float saves into a file
*/
private void BtnCipher_Click(object sender, RoutedEventArgs e)
{
try
{
WAVHeader cipheredFile = wavHeader;
Cipher cipher = new Cipher(cipheredFile.WavData.OriginalData);
float[] encoded = cipher.getCipheredData();
cipheredFile.WavData.DataToSave = cipheredFile.WavData.Normalize(encoded);
WAVWriter wavWriter = new WAVWriter();
wavWriter.WriteWAVFile(cipheredFile);
System.Windows.MessageBox.Show("Plik zostal zaszyfrowany i zapisany do pliku.");
}
catch (Exception ex)
{
System.Windows.MessageBox.Show("Najpierw trzeba wczytac plik.");
}
}
/// <summary>
/// Adds wav header items to first tab for MainWindow.xaml
/// </summary>
private void AddToList(WAVHeader header)
{
List <ListFormat> list = new List <ListFormat>();
list.Add(new ListFormat("ChunkID", header.ChunkId));
list.Add(new ListFormat("ChunkSize", header.ChunkSize));
list.Add(new ListFormat("Format", header.Format));
list.Add(new ListFormat("Subchunk1ID", header.Subchunk1Id));
list.Add(new ListFormat("Subchunk1Size", header.Subchunk1Size));
list.Add(new ListFormat("AudioFormat", header.AudioFormat));
list.Add(new ListFormat("Number of channels", header.NumChannels));
list.Add(new ListFormat("Sample Rate", header.SampleRate));
list.Add(new ListFormat("Byte Rate", header.ByteRate));
list.Add(new ListFormat("Block Align", header.BlockAlign));
list.Add(new ListFormat("Bits per Sample", header.BitPerSample));
list.Add(new ListFormat("Subchunk2ID", header.Subchunk2Id));
list.Add(new ListFormat("Subchunk2Size", header.Subchunk2Size));
listTemplate.ItemsSource = list;
}
public void WriteWAVFile(WAVHeader header)
{
using (FileStream fs = File.Open(this.filename, FileMode.OpenOrCreate))
{
BinaryWriter binaryWriter = new BinaryWriter(fs);
binaryWriter.Write(this.FormatValue(header.ChunkId));
binaryWriter.Write(header.ChunkSize);
binaryWriter.Write(this.FormatValue(header.Format));
binaryWriter.Write(this.FormatValue(header.Subchunk1Id));
binaryWriter.Write(header.Subchunk1Size);
binaryWriter.Write((Int16)header.AudioFormat);
binaryWriter.Write((Int16)header.NumChannels);
binaryWriter.Write(header.SampleRate);
binaryWriter.Write(header.ByteRate / 8);
binaryWriter.Write((Int16)header.BlockAlign);
binaryWriter.Write((Int16)header.BitPerSample);
binaryWriter.Write(this.FormatValue(header.Subchunk2Id));
binaryWriter.Write(header.Subchunk2Size);
for (int i = 0; i < header.WavData.DataToSave.Length; i++)
{
binaryWriter.Write(header.WavData.DataToSave[i]);
}
}
}
