c# naudio wav录制声音和显示波形图

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using NAudio.Wave;

using System.IO;

namespace TestAudio

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private IWaveIn waveIn;

private WaveFileWriter writer;

List<float> sampleAggregator = new List<float>();//用来储存波形数据

private void btnStart_Click(object sender, EventArgs e)

{

StartRecording();

}

/// <summary>

/// 开始录音

/// </summary>

private void StartRecording()

{

if (waveIn != null) return;

Text = "start recording....";

btnStart.Text = "正在录制....";

btnStart.Enabled = false;

waveIn = new WaveIn { WaveFormat = new WaveFormat(8000, 1) };//设置码率

writer = new WaveFileWriter("test.wav", waveIn.WaveFormat);

waveIn.DataAvailable += waveIn_DataAvailable;

waveIn.RecordingStopped += OnRecordingStopped;

waveIn.StartRecording();

}

/// <summary>

/// 录音中

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void waveIn_DataAvailable(object sender, WaveInEventArgs e)

{

writer.Write(e.Buffer, 0, e.BytesRecorded);

byte[] buffer = e.Buffer;

int bytesRecorded = e.BytesRecorded;

for (int index = 0; index < e.BytesRecorded; index += 2)

{

short sample = (short)((buffer[index + 1] << 8) |

buffer[index + 0]);

float sample32 = sample / 32768f;

sampleAggregator.Add(sample32);

}

int secondsRecorded = (int)(writer.Length / writer.WaveFormat.AverageBytesPerSecond);//录音时间获取

if (secondsRecorded >= 3)//只录制6秒

{

waveIn.StopRecording();

Text = "complete";

btnStart.Text = "开始录制";

btnStart.Enabled = true;

//------------------------------------开始画波形图。

Text = sampleAggregator.Min() + "," + sampleAggregator.Max();

int baseMidHeight = 50;

float h = 0;

for (int i = 0; i < sampleAggregator.Count; i+=60) {//大概意思意思 60的步长是怕太多了。

h= sampleAggregator[i] * 300;

flowLayoutPanel1.Controls.Add(new Label() { BackColor = Color.Pink, Width = 5, Height = (int)h, Margin = new Padding(0, baseMidHeight-(int)h, 0, 0) });

}

//-----------------------------------------------------

}

/// <summary>

/// 停止录音

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void OnRecordingStopped(object sender, StoppedEventArgs e)

{

if (waveIn != null) // 关闭录音对象

{

waveIn.Dispose();

waveIn = null;

}

if (writer != null)//关闭文件流

{

writer.Close();

writer = null;

}

if (e.Exception != null)

{

MessageBox.Show(String.Format("出现问题 " + e.Exception.Message));

}

private void Form1_Load(object sender, EventArgs e)

{

}

WPF 例子：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using NAudio.Wave;

using System.Collections.ObjectModel;

using System.ComponentModel;

namespace TestAudioWPF

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

listView.DataContext = listView.ItemsSource = sampleAggregator;

}

private IWaveIn waveIn;

private WaveFileWriter writer;

ObservableCollection<WaveInfo> sampleAggregator = new ObservableCollection<WaveInfo> ();//用来储存波形数据

/// <summary>

/// 开始录音

/// </summary>

private void StartRecording()

{

if (waveIn != null) return;

Title = "start recording....";

btnStart.Content = "正在录制....";

btnStart.IsEnabled = false;

sampleAggregator.Clear();

waveIn = new WaveIn { WaveFormat = new WaveFormat(8000, 1) };//设置码率

writer = new WaveFileWriter("test.wav", waveIn.WaveFormat);

waveIn.DataAvailable += waveIn_DataAvailable;

waveIn.RecordingStopped += OnRecordingStopped;

waveIn.StartRecording();

}

/// <summary>

/// 录音中

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void waveIn_DataAvailable(object sender, WaveInEventArgs e)

{

writer.Write(e.Buffer, 0, e.BytesRecorded);

byte[] buffer = e.Buffer;

int bytesRecorded = e.BytesRecorded;

//------------------------------------开始画波形图。

sampleAggregator.Clear();//可以不清除，就会一直保持历史记录<br><br> for (int index = 0; index < e.BytesRecorded; index += 2)

{

short sample = (short)((buffer[index + 1] << 8) |

buffer[index + 0]);

float sample32 = sample / 32768f;

if (sample32 > 0.03f)

{

sampleAggregator.Add(new WaveInfo() { heigth = sample32*300f });

}

//---------------------------------------------------------

int secondsRecorded = (int)(writer.Length / writer.WaveFormat.AverageBytesPerSecond);//录音时间获取

if (secondsRecorded >= 552)//只录制552秒

{

waveIn.StopRecording();

Title = "complete";

btnStart.Content = "开始录制";

btnStart.IsEnabled = true;

}

/// <summary>

/// 停止录音

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void OnRecordingStopped(object sender, StoppedEventArgs e)

{

if (waveIn != null) // 关闭录音对象

{

waveIn.Dispose();

waveIn = null;

}

if (writer != null)//关闭文件流

{

writer.Close();

writer = null;

}

if (e.Exception != null)

{

MessageBox.Show(String.Format("出现问题 " + e.Exception.Message));

}

private void Form1_Load(object sender, EventArgs e)

{

}

private void btnStart_Click(object sender, RoutedEventArgs e)

{

StartRecording();

}

public class WaveInfo :INotifyPropertyChanged{

public event PropertyChangedEventHandler PropertyChanged;

private float _heigth;

public float heigth

{

get {

return _heigth;

}

set {

if (value != _heigth)

{ _heigth = value;

OnPropertyChanged("heigth");

}

private string text;

public string Text

{

get { return text; }

set { text = value; OnPropertyChanged("Text"); }

}

protected void OnPropertyChanged(string propertyName = "")

{

PropertyChangedEventHandler handler = PropertyChanged;

if (handler != null)

{

handler(this, new PropertyChangedEventArgs(propertyName));

}

<Window x:Class="TestAudioWPF.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="MainWindow" Height="350" Width="525">

<Grid>

<ListView.ItemTemplate>

</DataTemplate>

</ListView.ItemTemplate>

<ListView.ItemsPanel>

</ItemsPanelTemplate>

</ListView.ItemsPanel>

</ListView>

</WrapPanel>

</Grid>

</Window>

// short s = BitConverter.ToInt16(e.Buffer, 0);//这样采样比较少，反正是int16型的
// int w= Math.Abs(s / 50)

// sampleAggregator.Add(new WaveInfo() { heigth = w });

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发表于 2022-11-29 10:05
阅读 ( 618 )
分类：C/C++开发

c# naudio wav录制声音和显示波形图

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