/// <summary>
/// Select Audio File Handler
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void selectAudioFile_Click(object sender, RoutedEventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
WavFileInfo wavFileInfo = null;
openFileDialog.Filter = "MP3 files (*.mp3)|*.mp3| WAV files (*.wav)|*.wav| All files (*.*)|*.*";
if (openFileDialog.ShowDialog() == true)
{
mediaPlayer.Open(new Uri(openFileDialog.FileName));
mediaPlayer.MediaOpened += mediaPlayer_MediaOpened;
FileName = openFileDialog.FileName;
string fileExtension = System.IO.Path.GetExtension(FileName);
if (fileExtension == ".wav")
{
wavFileInfo = ReadWAVFile(FileName);
}
}
}
/// <summary>
/// Reads the wav file and gets fileInfo and data information
/// </summary>
/// <param name="fileName"></param>
private WavFileInfo ReadWAVFile(string fileName)
{
WavFileInfo fileInfo = new WavFileInfo();
// Getting the data from the file path in binary format.
FileStream wavFileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
BinaryReader reader = new BinaryReader(wavFileStream);
byte[] fileBytes = File.ReadAllBytes(fileName);
// Reading the wav file fileInfo and extracting important information.
// The Wav File Header size is 44 bytes.
int chunkID = reader.ReadInt32();
int chunkSize = reader.ReadInt32();
int Format = reader.ReadInt32();
int formatID = reader.ReadInt32();
int formatSize = reader.ReadInt32();
int audioEncodingFormat = reader.ReadInt16();
int numChannels = reader.ReadInt16(); // Number of channels: 1-Mono, 2-Stereo
int sampleRate = reader.ReadInt32(); // Sampling Rate - No of Samples/sec
int byteRate = reader.ReadInt32();
int blockAlign = reader.ReadInt16();
int bitsPerSample = reader.ReadInt16(); // Bits per Sample
if (formatSize == 18)
{
// Read extra values
int formatExtraSize = reader.ReadInt16();
reader.ReadBytes(formatExtraSize);
}
int dataID = reader.ReadInt32();
int dataSize = reader.ReadInt32(); // Audio data size
byte[] wavData = reader.ReadBytes(dataSize); // Contains actual data
// Convert byte data to double
reader.Read();
// Populate Wav fileInfo object properties and return it
fileInfo.SampleRate = sampleRate;
fileInfo.BitsPerSample = bitsPerSample;
fileInfo.NumChannels = numChannels;
fileInfo.WavData = wavData;
return(fileInfo);
}
