c#NAudio 录音功能实现

c#NAudio 录音功能实现

在网上找了很多类似录音教程效果都不好，或根本不能录音，代码由网上借鉴修改（完整实现录音播放功能）

NAudio

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。

NAudio功能强大，且其入门容易。
强大在于：它支持许多音频操作，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（详细介绍可以看Github readme）。

新建RecordController

首先新建引用类 RecordController

public class RecordController 
{
	public WaveIn mWavIn;
	public WaveFileWriter mWavWriter;
	/// <summary>
	/// 开始录音
	/// </summary>
	/// <param name="filePath"></param>
	public void StartRecord(string filePath) 
	{
		mWavIn = new WaveIn();
		mWavIn.DataAvailable += MWavIn_DataAvailable;
		// mWavIn.RecordingStopped += MWavIn_RecordingStopped; 有冲突
		mWavWriter = new WaveFileWriter(filePath, mWavIn.WaveFormat);
		mWavIn.StartRecording();
	}
	/// <summary>
	/// 停止录音
	/// </summary>
	public void StopRecord() 
	{
		mWavIn?.StopRecording();
		mWavIn?.Dispose();
		mWavIn = null;
		mWavWriter?.Close();
		mWavWriter = null;
	}
	//这个方法在调用关闭时会有冲突
	private void MWavIn_RecordingStopped(object sender, StoppedEventArgs e) 
	{
		//mWavIn?.Dispose();
		//mWavIn = null;
		//mWavWriter?.Close();
		//mWavWriter = null;
	}
	private void MWavIn_DataAvailable(object sender, WaveInEventArgs e) 
	{
		mWavWriter.Write(e.Buffer, 0, e.BytesRecorded);
		int secondsRecorded = (int)mWavWriter.Length / mWavWriter.WaveFormat.AverageBytesPerSecond;
	}
}

使用

在主界面引用 RecordController record = new RecordController();

/// <summary>
/// 耳机sidetone测试
/// </summary>
/// <param name="i"></param>
public void Sidetone(int i) 
{
	string[] row = getlistviewitem(i);
	record.StartRecord("e:\rec.wav");
	if (MessageBox.Show("正在录音，点击是播放录音", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information) == DialogResult.No) 
	{
		record.StopRecord();
		ErrorFlag = false;
		row[6] = "FAIL";
	} else 
	{
		record.StopRecord();
		string path = "e:\rec.wav";
		//.wav音频文件路径
		System.Media.SoundPlayer player = new System.Media.SoundPlayer(path);
		player.Play();
		if (MessageBox.Show("是否有录音", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information) == DialogResult.No) 
		{
			ErrorFlag = false;
			row[6] = "FAIL";
		} else 
		{
			ErrorFlag = true;
			row[5] = "OK";
			row[6] = "PASS";
		}
	}
	listupdate(row, i);
}

完成代码后测试是能正常录音