private void OpenWaveFile(out int Sample_Freq, out double[] SignalETC)
{
NAudio.Wave.WaveFileReader WP = new NAudio.Wave.WaveFileReader(Signal_Status.Text);
int BytesPerSample = WP.WaveFormat.Channels * WP.WaveFormat.BitsPerSample / 8;
int BytesPerChannel = WP.WaveFormat.BitsPerSample / 8;
byte[] signalbuffer = new byte[BytesPerSample];
int ChannelCt = WP.WaveFormat.Channels;
Sample_Freq = WP.WaveFormat.SampleRate;
double[] SignalInt = new double[WP.SampleCount];
if (WP.WaveFormat.BitsPerSample == 8)
{
System.Windows.Forms.MessageBox.Show("Selected File is an 8-Bit audio file. This program requires a minimum bit-depth of 16.");
SignalETC = new double[SignalInt.Length];
return;
}
byte[] temp = new byte[4];
int c = (int)DryChannel.Value - 1;
for (int i = 0; i < WP.SampleCount; i++)
{
WP.Read(signalbuffer, 0, BytesPerSample);
if (WP.WaveFormat.BitsPerSample == 32)
{
SignalInt[i] = BitConverter.ToInt32(signalbuffer, c * 4);
}
else if (WP.WaveFormat.BitsPerSample == 24)
{
temp[1] = signalbuffer[c * BytesPerChannel];
temp[2] = signalbuffer[c * BytesPerChannel + 1];
temp[3] = signalbuffer[c * BytesPerChannel + 2];
SignalInt[i] = BitConverter.ToInt32(temp, 0);
}
else if (WP.WaveFormat.BitsPerSample == 16)
{
temp[2] = signalbuffer[c * BytesPerChannel];
temp[3] = signalbuffer[c * BytesPerChannel + 1];
SignalInt[i] = BitConverter.ToInt32(temp, 0);
}
}
SignalETC = new double[SignalInt.Length];
double Max = double.NegativeInfinity;
for (int i = 0; i < SignalInt.Length; i++)
{
Max = Math.Max(Max, Math.Abs(SignalInt[i]));
}
for (int i = 0; i < SignalInt.Length; i++)
{
SignalETC[i] = SignalInt[i] / Max;
}
SignalETC = SignalInt;
}
/// <summary>
/// Reads the wave file.
/// </summary>
/// <param name="filePath">The file path.</param>
/// <returns></returns>
double[] ReadWaveFile(string filePath)
{
byte[] buffer = new byte[4];
double[] dataStorage = new double[signalLength];
long read = 0;
long position = 0;
NAudio.Wave.WaveFileReader waveReader = new NAudio.Wave.WaveFileReader(filePath);
while (waveReader.Position < dataStorage.Length * 2)
{
read = waveReader.Read(buffer, 0, 4);
for (int i = 0; i < read / 2; i += 1)
{
dataStorage[position] = BitConverter.ToInt16(buffer, i * 2);
position++;
}
}
return(dataStorage);
}
private async static void PlaySoundWav(MessageEventArgs e)
{
if (e.Message.Text.Length > "-play ".Length && voiceclient != null)
{
string file = e.Message.Text.Substring("-play ".Length);
Console.WriteLine("Trying to play: " + file);
try {
var ws = new NAudio.Wave.WaveFileReader(file);
byte[] buf;
if (ws.WaveFormat.Channels > 1)
{
var tomono = new NAudio.Wave.StereoToMonoProvider16(ws);
tomono.RightVolume = 0.5f;
tomono.LeftVolume = 0.5f;
buf = new byte[ws.Length];
while (ws.HasData(ws.WaveFormat.AverageBytesPerSecond))
{
tomono.Read(buf, 0, ws.WaveFormat.AverageBytesPerSecond);
voiceclient.SendVoicePCM(buf, buf.Length);
}
}
else
{
buf = new byte[ws.Length];
ws.Read(buf, 0, buf.Length);
voiceclient.SendVoicePCM(buf, buf.Length);
}
ws.Close();
}
catch(Exception)
{
Console.WriteLine("File not found or incompatible.");
}
}
}
private void OpenWaveFile(out int Sample_Freq, out double[] SignalETC)
{
NAudio.Wave.WaveFileReader WP = new NAudio.Wave.WaveFileReader(Signal_Status.Text);
int BytesPerSample = WP.WaveFormat.Channels * WP.WaveFormat.BitsPerSample / 8;
int BytesPerChannel = WP.WaveFormat.BitsPerSample / 8;
byte[] signalbuffer = new byte[BytesPerSample];
int ChannelCt = WP.WaveFormat.Channels;
Sample_Freq = WP.WaveFormat.SampleRate;
double[] SignalInt = new double[WP.SampleCount];
if (WP.WaveFormat.BitsPerSample == 8)
{
System.Windows.Forms.MessageBox.Show("Selected File is an 8-Bit audio file. This program requires a minimum bit-depth of 16.");
SignalETC = new double[SignalInt.Length];
return;
}
byte[] temp = new byte[4];
int c = (int)DryChannel.Value - 1;
//double Max;
//switch (WP.WaveFormat.BitsPerSample)
//{
// case 32:
// Max = Int32.MaxValue;
// break;
// case 24:
// Max = BitConverter.ToInt32(new byte[] { 0, byte.MaxValue, byte.MaxValue, byte.MaxValue }, 0);
// break;
// case 16:
// Max = Int16.MaxValue;
// break;
// case 8:
// Max = BitConverter.ToInt16(new byte[] { 0, byte.MaxValue }, 0);
// break;
// default:
// throw new Exception("Invalid bit depth variable... Where did you get this audio file again?");
//}
for (int i = 0; i < WP.SampleCount; i++)
{
WP.Read(signalbuffer, 0, BytesPerSample);
if (WP.WaveFormat.BitsPerSample == 32)
{
SignalInt[i] = BitConverter.ToInt32(signalbuffer, c * 4);
}
else if (WP.WaveFormat.BitsPerSample == 24)
{
temp[1] = signalbuffer[c * BytesPerChannel];
temp[2] = signalbuffer[c * BytesPerChannel + 1];
temp[3] = signalbuffer[c * BytesPerChannel + 2];
SignalInt[i] = BitConverter.ToInt32(temp, 0);
}
else if (WP.WaveFormat.BitsPerSample == 16)
{
temp[2] = signalbuffer[c * BytesPerChannel];
temp[3] = signalbuffer[c * BytesPerChannel + 1];
SignalInt[i] = BitConverter.ToInt32(temp, 0);
}
}
SignalETC = new double[SignalInt.Length];
double Max = double.NegativeInfinity;
for (int i = 0; i < SignalInt.Length; i++)
{
Max = Math.Max(Max, Math.Abs(SignalInt[i]));
}
for (int i = 0; i < SignalInt.Length; i++)
{
SignalETC[i] = SignalInt[i] / Max;
}
SignalETC = SignalInt;
}
private void OpenWaveFile(out int Sample_Freq, out double[] SignalETC)
{
NAudio.Wave.WaveFileReader WP = new NAudio.Wave.WaveFileReader(Signal_Status.Text);
int BytesPerSample = WP.WaveFormat.Channels * WP.WaveFormat.BitsPerSample / 8;
int BytesPerChannel = WP.WaveFormat.BitsPerSample / 8;
byte[] signalbuffer = new byte[BytesPerSample];
int ChannelCt = WP.WaveFormat.Channels;
Sample_Freq = WP.WaveFormat.SampleRate;
double[] SignalInt = new double[WP.SampleCount]; //[Sample]
if (WP.WaveFormat.BitsPerSample == 8)
{
System.Windows.Forms.MessageBox.Show("Selected File is an 8-Bit audio file. This program requires a minimum bit-depth of 16.");
SignalETC = new double[SignalInt.Length];
return;
}
byte[] temp = new byte[4];
int c = (int)DryChannel.Value - 1;
double Max;
switch (WP.WaveFormat.BitsPerSample)
{
case 32:
Max = Int32.MaxValue;
break;
case 24:
Max = BitConverter.ToInt32(new byte[] { 0, byte.MaxValue, byte.MaxValue, byte.MaxValue }, 0);
break;
case 16:
Max = Int16.MaxValue;
break;
case 8:
Max = BitConverter.ToInt16(new byte[] {0, byte.MaxValue}, 0);
break;
default:
throw new Exception("Invalid bit depth variable... Where did you get this audio file again?");
}
for (int i = 0; i < WP.SampleCount; i++)//Have we chosen the right property to get the number of bytes in the file?
{
WP.Read(signalbuffer, 0, BytesPerSample);
if (WP.WaveFormat.BitsPerSample == 32)
{
SignalInt[i] = BitConverter.ToInt32(signalbuffer, c * 4);
}
else if (WP.WaveFormat.BitsPerSample == 24)
{
temp[1] = signalbuffer[c * BytesPerChannel];
temp[2] = signalbuffer[c * BytesPerChannel + 1];
temp[3] = signalbuffer[c * BytesPerChannel + 2];
SignalInt[i] = BitConverter.ToInt32(temp, 0);
}
else if (WP.WaveFormat.BitsPerSample == 16)
{
temp[2] = signalbuffer[c * BytesPerChannel];
temp[3] = signalbuffer[c * BytesPerChannel + 1];
SignalInt[i] = BitConverter.ToInt32(temp, 0);
}
}
SignalETC = SignalInt;
}
// Calcula FFT e plota o gráfico
public void analise()
{
// Lê o arquivo .wav que está em reader e transfere para o buffer
byte[] buffer = new byte[reader.Length];
reader.Read(buffer, 0, buffer.Length);
// Cria o vetor de amostras
sample = new short[reader.Length];
// Faz a conversão de buffer de byte para inteiro de 16bit(short) e armazena
// no vetor de amostras.
// Observar que grava em amostra a cada 2 saltos de posição.
for (int n = 0; n < buffer.Length; n += 2)
{
sample[n] = BitConverter.ToInt16(buffer, n);
}
// Plota o grafico deste vetor de amostra em função do tempo
if (cfg_dg.checkBox1.Checked)
{
graph_t_amostrado(sample);
}
// Faz a adaptação de inteiro para complexo. Ex 15 => 15 + 0i
// E armazena em um vetor complexo que servirá de entrada
// para a FFT.
Complex[] complexData = new Complex[sample.Length];
for (int i = 0; i < complexData.Length; i++)
{
Complex tmp = new Complex(sample[i], 0);
complexData[i] = tmp;
}
//MessageBox.Show("Arquivo: " + reader.Length + "\nAmostras: " + sample.Length);
//Pega a offset+N(cfg_dg.nzao)-1 amostras que é definida pelo usuario
// atraves das configurações. Obrigatoriamente potencia de 2.
tmpComplexArray = new Complex[cfg_dg.nzao];
for (int i = cfg_dg.offset, j = 0; i < cfg_dg.nzao; i++, j++)
{
Complex a = new Complex(complexData[i]);
tmpComplexArray[j] = a;
}
//run FFT - Verificar FFT_Aforge.cs para codigo do FFT
FourierTransform.FFT(tmpComplexArray, FourierTransform.Direction.Forward);
// Plota graficos de saida da FFT
// Pega-se a magnitude do num complexo e calcula 20log10(Mag) para obter ganho
// em dB.
// Para a frequencia captura-se a frequencia de amostragem (Supor FA = 44100 Hz)
// do arquivo.wav e captura o valor de N (aquele que tem que ser potencia de 2).
// Supondo que N = 1024 (ou 2^10), então os valores da frequencia em Hz são
// calculados da seguinte maneira:
// i * FA/N
// 0 * 44100/1024 = 0Hz
// 1 * 44100/1024 = 43.1Hz
// .
// .
// 511 * 44100/1024 = 22006.9 Hz
// 512 * 44100/1024 = 22050 Hz Particularidade: Representa a frequencia de Nyquist (FA/2)
// .
// 1023 * 44100/1024 = 44056,9 Hz Ultimo.
double freq_para_hertz;
double mag_para_dB;
for (int i = 0; i < tmpComplexArray.Length; i++)
{
freq_para_hertz = ((double)i * (double)_reader_freq / (double)cfg_dg.nzao);
mag_para_dB = 20 * Math.Log10(tmpComplexArray[i].Magnitude);
if (cfg_dg.rb_Bar.Checked)
{
chart1.Series["Series1"].Points.AddXY(freq_para_hertz, mag_para_dB);
}
if (cfg_dg.rb_Pon.Checked)
{
chart1.Series["Series2"].Points.AddXY(freq_para_hertz, mag_para_dB);
}
if (cfg_dg.rb_PR.Checked)
{
chart1.Series["Series2"].Points.AddXY(freq_para_hertz, mag_para_dB);
chart1.Series["Series3"].Points.AddXY(freq_para_hertz, mag_para_dB);
}
if (cfg_dg.rb_PS.Checked)
{
chart1.Series["Series2"].Points.AddXY(freq_para_hertz, mag_para_dB);
chart1.Series["Series4"].Points.AddXY(freq_para_hertz, mag_para_dB);
}
}
//
}
private void OpenWaveFile(out int Sample_Freq, out double[] SignalETC)
{
NAudio.Wave.WaveFileReader WP = new NAudio.Wave.WaveFileReader(Signal_Status.Text);
int BytesPerSample = WP.WaveFormat.Channels * WP.WaveFormat.BitsPerSample / 8;
int BytesPerChannel = WP.WaveFormat.BitsPerSample / 8;
byte[] signalbuffer = new byte[BytesPerSample];
int ChannelCt = WP.WaveFormat.Channels;
Sample_Freq = WP.WaveFormat.SampleRate;
double[] SignalInt = new double[WP.SampleCount];
if (WP.WaveFormat.BitsPerSample == 8)
{
System.Windows.Forms.MessageBox.Show("Selected File is an 8-Bit audio file. This program requires a minimum bit-depth of 16.");
SignalETC = new double[SignalInt.Length];
return;
}
byte[] temp = new byte[4];
int c = (int)DryChannel.Value - 1;
//double Max;
//switch (WP.WaveFormat.BitsPerSample)
//{
// case 32:
// Max = Int32.MaxValue;
// break;
// case 24:
// Max = BitConverter.ToInt32(new byte[] { 0, byte.MaxValue, byte.MaxValue, byte.MaxValue }, 0);
// break;
// case 16:
// Max = Int16.MaxValue;
// break;
// case 8:
// Max = BitConverter.ToInt16(new byte[] { 0, byte.MaxValue }, 0);
// break;
// default:
// throw new Exception("Invalid bit depth variable... Where did you get this audio file again?");
//}
for (int i = 0; i < WP.SampleCount; i++)
{
WP.Read(signalbuffer, 0, BytesPerSample);
if (WP.WaveFormat.BitsPerSample == 32)
{
SignalInt[i] = BitConverter.ToInt32(signalbuffer, c * 4);
}
else if (WP.WaveFormat.BitsPerSample == 24)
{
temp[1] = signalbuffer[c * BytesPerChannel];
temp[2] = signalbuffer[c * BytesPerChannel + 1];
temp[3] = signalbuffer[c * BytesPerChannel + 2];
SignalInt[i] = BitConverter.ToInt32(temp, 0);
}
else if (WP.WaveFormat.BitsPerSample == 16)
{
temp[2] = signalbuffer[c * BytesPerChannel];
temp[3] = signalbuffer[c * BytesPerChannel + 1];
SignalInt[i] = BitConverter.ToInt32(temp, 0);
}
}
SignalETC = new double[SignalInt.Length];
double Max = double.NegativeInfinity;
for(int i = 0; i < SignalInt.Length; i++)
{
Max = Math.Max(Max, Math.Abs(SignalInt[i]));
}
for(int i = 0; i < SignalInt.Length; i++)
{
SignalETC[i] = SignalInt[i] / Max;
}
SignalETC = SignalInt;
}