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项目=>NuGet包管理器 搜索NAudio点击安装,自动安装依赖库。
安装成功后工具箱会新增NAudio.WinForms控件
NAudio为.NET平台下的开源库,采用ML-PL协议,开源地址:https://github.com/naudio/NAudio支持多种音频操作,可实现多种API播放与录制、多种不同音频格式、音频格式转换(重采样、位深、声道等)、音频编码、多通道播放、音频效果处理等等。
常用类:
常用接口:
自定义录音机类:Recorder.cs
using NAudio.Wave; using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace NAudioDemo { internal class Recorder { public WaveIn mWaveIn; public WaveFileWriter mWaveFileWriter; public int secondsRecorded; /// <summary> /// 开始录音 /// </summary> /// <param name="filePath"></param> public void RecorderStart(string filePath) { // 创建WaveIn对象 mWaveIn = new WaveIn(); // 添加DataAvailable事件处理回调 mWaveIn.DataAvailable += OnDataAvailable; // 创建WaveFileWriter对象 mWaveFileWriter = new WaveFileWriter(filePath, mWaveIn.WaveFormat); // 开始录音 mWaveIn.StartRecording(); } /// <summary> /// 停止录音 /// </summary> public void RecorderStop() { mWaveIn?.StopRecording(); mWaveIn?.Dispose(); mWaveFileWriter?.Close(); mWaveFileWriter = null; } /// <summary> /// 录音数据回调 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void OnDataAvailable(object sender, WaveInEventArgs e) { // 写入录音数据 mWaveFileWriter.Write(e.Buffer, 0, e.BytesRecorded); // 计算已录制的秒数 secondsRecorded = (int)mWaveFileWriter.Length / mWaveFileWriter.WaveFormat.AverageBytesPerSecond; } } }
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 System.IO; using NAudio.Wave; using System.Drawing.Text; using System.Media; using NAudio.Dsp; namespace NAudioDemo { public partial class Form1 : Form { // 创建录音机类实例 Recorder recorder = new Recorder(); public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { button1.Enabled = false; button2.Enabled = true; recorder.RecorderStart(@"D:\1.wav"); } private void button2_Click(object sender, EventArgs e) { button1.Enabled = true; button2.Enabled = false; recorder.RecorderStop(); } private void button3_Click(object sender, EventArgs e) { SoundPlayer player = new SoundPlayer(@"D:\1.wav"); player.Play(); } } }
借助 WaveIn 类, 我们可以轻易的捕获麦克风输入, 在每一次录制到数据时, 将数据写入到文件或其他流, 这就实现了保存录音
在保存波形文件时需要借助 WaveFileWriter, 当然, 如果你想保存为其他格式, 也可以使用其它的 Writer, 例如 CurWaveFileWriter 以及AiffFileWriter, 美中不足的是没有直接写入到 MP3 的 FileWriter
需要注意的是, 桌面程序可以直接使用 WaveIn, 其回调基于 Windows 消息, 所以无法在控制台应用中使用 WaveIn
如果要在控制台应用中实现录音, 只需要使用 WaveInEvent, 它的回调基于事件而不是 Windows 消息, 所以可以通用
示例代码:
WaveIn cap = new WaveIn(); // cap, capture
WaveFileWriter writer = new WaveFileWriter();
cap.DataAvailable += (s, args) => writer.Write(args.Buffer, 0, args.BytesRecorded); // 订阅事件
cap.StartRecording(); // 开始录制
cap.StopRecording(); // 停止录制
writer.Close(); // 关闭 FileWriter, 保存数据
另外, 除了使用 WaveIn, 你还可以使用 WasapiCapture, 它与 WaveIn 的使用方式是一致的, 可以用来录制麦克风
Wasapi 全称 Windows Audio Session Application Programming Interface (Windows音频会话应用编程接口)
具体 WaveIn, WaveInEvent, WasapiCapture 的性能, 笔者还没有测试过, 但估计不会有太大差异.
提示: WasapiCapture 和 WasapiLoopbackCapture 位于 NAudio.Wave 命名空间下
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using NAudio; using NAudio.Wave; namespace NAudioDemo2 { public partial class Form2 : Form { private WaveIn waveIn = null; private WaveFileWriter writer = null; public Form2() { InitializeComponent(); button2.Enabled = false; button3.Enabled = false; } /// <summary> /// 设置保存文件名称 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button1_Click(object sender, EventArgs e) { saveFileDialog1.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments); saveFileDialog1.Filter = "audio files (*.wav)|*.wav| all files (*.*)|*.*"; // 文件类型过滤 saveFileDialog1.DefaultExt = "*.wav"; // 默认文件扩展名 //saveFileDialog1.FileName = "1.wav"; // 默认文件名 if (saveFileDialog1.ShowDialog() == DialogResult.OK) { string fName = saveFileDialog1.FileName; // 获取文件名 textBox1.Text = fName; button2.Enabled = true; } } /// <summary> /// 开始录音 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button2_Click(object sender, EventArgs e) { //waveIn = new WaveIn { WaveFormat = new WaveFormat(44100, 1) }; waveIn = new WaveIn(); waveIn.WaveFormat = new WaveFormat(44100, 1); writer = new WaveFileWriter(textBox1.Text.Trim(), waveIn.WaveFormat); waveIn.DataAvailable += (s, args) => writer.Write(args.Buffer, 0, args.BytesRecorded); waveIn.StartRecording(); button2.Enabled = false; button3.Enabled = true; } /// <summary> /// 停止录音 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button3_Click(object sender, EventArgs e) { waveIn.StopRecording(); waveIn.Dispose(); waveIn = null; writer.Flush(); writer.Close(); writer.Dispose(); button2.Enabled = true; button3.Enabled = false; } } }
录制声卡输出, 也就是录制计算机正在播放的声音, 借助 WasapiLoopbackCapture 即可简单实现, 使用方式与 WasapiCapture 无异
WasapiLoopbackCapture cap = new WasapiLoopbackCapture();
WaveFileWriter writer = new WaveFileWriter();
cap.DataAvailable += (s, args) => writer.Write(args.Buffer, 0, args.BytesRecorded);
cap.StartRecording();
using NAudio.Wave; 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; namespace NAudioDemo2 { public partial class Form3 : Form { private WasapiLoopbackCapture loopCap = new WasapiLoopbackCapture(); private WaveFileWriter fileWriter; public Form3() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { SaveFileDialog saveFileDialog = new SaveFileDialog(); saveFileDialog.Filter = "wave file *.wav|*.wav|all filse *.*|*.*"; saveFileDialog.DefaultExt = ".wav"; if (saveFileDialog.ShowDialog() == DialogResult.OK) { string fName = saveFileDialog.FileName; textBox1.Text = fName; } } /// <summary> /// 录制声卡开始 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button2_Click(object sender, EventArgs e) { fileWriter = new WaveFileWriter(textBox1.Text.Trim(), loopCap.WaveFormat) ; loopCap.DataAvailable += (s, args) => fileWriter.Write(args.Buffer, 0, args.BytesRecorded); loopCap.StartRecording(); } /// <summary> /// 录制声卡停止 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button3_Click(object sender, EventArgs e) { loopCap.StopRecording(); fileWriter.Flush(); fileWriter.Close(); fileWriter.Dispose(); } } }
NAudio 中, 通过 WaveFileReader 来读取波形数据, 在实例化时, 你可以指定文件名或者是输入流, 这意味着你可以读取内存流中的音频数据.
WaveFileReader reader = new WaveFileReader(filepath);
WaveOut wout = new WaveOut();
wout.Init(reader); // 通过 IWaveProvider 为音频输出初始化
wout.Play(); // 至此, wout 将从指定的 reader 中提供的数据进行播放
using NAudio.Wave; 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; namespace NAudioDemo2 { public partial class Form4 : Form { private WaveOut wout_wav; WaveFileReader reader; public Form4() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = "audio file *.wav|*.wav"; ofd.DefaultExt = "*.wav"; if (ofd.ShowDialog() == DialogResult.OK) { string fName = ofd.FileName; textBox1.Text = fName; } } private void button2_Click(object sender, EventArgs e) { reader = new WaveFileReader(textBox1.Text.Trim()); wout_wav = new WaveOut(); wout_wav.Init(reader); wout_wav.Play(); } private void button3_Click(object sender, EventArgs e) { wout_wav.Pause(); } private void button4_Click(object sender, EventArgs e) { wout_wav.Resume(); } private void button5_Click(object sender, EventArgs e) { wout_wav.Stop(); wout_wav.Dispose(); reader.Close(); } } }
播放 MP3 音乐其实与播放波形音乐没有太大区别, 只不过将 WaveFileReader 换成Mp3FileReader 罢了
Mp3FileReader reader = new Mp3FileReader(filepath);
WaveOut wout = new WaveOut();
wout.Init(reader);
wout.Play();
using NAudio.Wave; 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; namespace NAudioDemo2 { public partial class Form5 : Form { Mp3FileReader reader; WaveOut wout_mp3; public Form5() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = "audio file *.mp3|*.mp3"; ofd.DefaultExt = "*.mp3"; if (ofd.ShowDialog() == DialogResult.OK) { string fName = ofd.FileName; textBox1.Text = fName; } } private void button2_Click(object sender, EventArgs e) { reader = new Mp3FileReader(textBox1.Text); wout_mp3 = new WaveOut(); wout_mp3.Init(reader); wout_mp3.Play(); } private void button3_Click(object sender, EventArgs e) { wout_mp3.Pause(); } private void button4_Click(object sender, EventArgs e) { wout_mp3.Resume(); } private void button5_Click(object sender, EventArgs e) { wout_mp3.Stop(); wout_mp3.Dispose(); reader.Close(); reader.Dispose(); } } }
通过AudioFileReader读取音频文件可以播放.mp3, .wav, .flac等多种格式
AudioFileReader reader = new AudioFileReader (@“d:\1.mp3”);
WaveOut wout = new WaveOut ();
wout.Init(reader );
wout.Play();
wout.Pause();
wout.Resume();
wout.Stop();
using NAudio.Wave; 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; namespace NAudioDemo2 { public partial class Form6 : Form { AudioFileReader reader; WaveOut wout; public Form6() { InitializeComponent(); } private void Form6_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = "audio file *.mp3|*.mp3|all files *.*|*.*"; if (ofd.ShowDialog() == DialogResult.OK) { string fName = ofd.FileName; textBox1.Text = fName; } } private void button2_Click(object sender, EventArgs e) { reader = new AudioFileReader(textBox1.Text.Trim()); wout = new WaveOut(); wout.Init(reader); wout.Play(); } private void button3_Click(object sender, EventArgs e) { wout.Pause(); } private void button4_Click(object sender, EventArgs e) { wout.Resume(); } private void button5_Click(object sender, EventArgs e) { wout.Stop(); wout.Dispose(); reader.Close(); reader.Dispose(); } } }
通过MediaFoundationReader 读取音频文件可以播放.mp3, .wav, .flac等多种格式
MediaFoundationReader reader = new MediaFoundationReader (@“d:\1.mp3”);
WaveOut wout = new WaveOut ();
wout.Init(reader );
wout.Play();
wout.Pause();
wout.Resume();
wout.Stop();
using NAudio.Wave; 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; namespace NAudioDemo2 { public partial class Form7 : Form { MediaFoundationReader reader; WaveOut wout; public Form7() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = "audio file *.mp3|*.mp3|all files *.*|*.*"; ofd.DefaultExt = "*.mp3"; if (ofd.ShowDialog() == DialogResult.OK) { string fName = ofd.FileName; textBox1.Text = fName; } } private void button2_Click(object sender, EventArgs e) { reader = new MediaFoundationReader(textBox1.Text.Trim()); wout = new WaveOut(); wout.Init(reader); wout.Play(); } private void button3_Click(object sender, EventArgs e) { wout.Pause(); } private void button4_Click(object sender, EventArgs e) { wout.Resume(); } private void button5_Click(object sender, EventArgs e) { wout.Stop(); wout.Dispose(); reader.Close(); reader.Dispose(); } } }
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