C#电脑麦克风录音 C#实现电脑麦克风录音
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本实例通过Naudio库完成麦克风录音并把PCM脉冲信号保存成wav音频文件。关于音频的采样率、比特率、声道等问题请查阅相关资料,本示例不做解释。Naudio库 请从NuGet搜索并下载。
录音接口类:
public interface ISpeechRecorder { void SetFileName(string fileName); void StartRec(); void StopRec(); }
录音实现类:
using System; using NAudio.Wave; namespace Test { class NAudioRecorder : ISpeechRecorder { public WaveIn waveSource = null; public WaveFileWriter waveFile = null; private string fileName = string.Empty; /// <summary> /// 第二步:开始录音 /// </summary> public void StartRec() { try { waveSource = new WaveIn();//保证电脑有麦克接入否则报错。 waveSource.WaveFormat = new WaveFormat(16000, 16, 1); // 16KHz,16bit,单声道的录音格式 waveSource.DataAvailable += new EventHandler<WaveInEventArgs>(waveSource_DataAvailable); waveSource.RecordingStopped += new EventHandler<StoppedEventArgs>(waveSource_RecordingStopped); waveFile = new WaveFileWriter(fileName, waveSource.WaveFormat); waveSource.StartRecording(); } catch(Exception e) { throw new Exception(e.Message); } } /// <summary> /// 第三步:停止录音 /// </summary> public void StopRec() { waveSource.StopRecording(); // Close Wave(Not needed under synchronous situation) if (waveSource != null) { waveSource.Dispose(); waveSource = null; } if (waveFile != null) { waveFile.Dispose(); waveFile = null; } } /// <summary> /// 第一步:设置录音结束后保存的文件路径 /// </summary> /// <param name="fileName">保存wav文件的路径名</param> public void SetFileName(string fileName) { this.fileName = fileName; } /// <summary> /// 开始录音回调函数 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void waveSource_DataAvailable(object sender, WaveInEventArgs e) { if (waveFile != null) { waveFile.Write(e.Buffer, 0, e.BytesRecorded); waveFile.Flush(); } } /// <summary> /// 录音结束回调函数 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void waveSource_RecordingStopped(object sender, StoppedEventArgs e) { if (waveSource != null) { waveSource.Dispose(); waveSource = null; } if (waveFile != null) { waveFile.Dispose(); waveFile = null; } } } }
调用方法:
NAudioRecorder nar=new NAudioRecorder(); nar.SetFileName(@"d:\naudio.wav"); nar.StartRec(); nar.StopRec();
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