NAudio 不播放 RawSourceWaveStream

Question

我想在录制到文件的同时播放 wave 音频流。我尝试使用 MemoryStream 和 RawSourceWaveStream 来实现这个结果。它似乎工作正常，音频已正确记录在文件中，但是当我从流中播放音频时，什么也没有播放。

这是我的源代码，有好心人告诉我问题出在哪里吗？

谢谢。

using System;
using System.Windows.Forms;
using NAudio.Wave;
using NAudio.Wave.SampleProviders;
using static System.Environment;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        WaveFileWriter fileWriter;
        WaveOut outputSound;
        WaveIn waveSource;
        RawSourceWaveStream RSS;
        OffsetSampleProvider offsetSampleProvider;
        Stream sourceStream;

        string fileName = GetFolderPath(SpecialFolder.CommonApplicationData) + "\temp.wav";

        public Form1()
        {
            InitializeComponent();

            outputSound = new WaveOut();
            waveSource = new WaveIn();
            waveSource.WaveFormat = new WaveFormat(8000, 16, 1);
            waveSource.DataAvailable += new EventHandler<WaveInEventArgs>(waveSource_DataAvailable);
            fileWriter = new WaveFileWriter(fileName, waveSource.WaveFormat);
            sourceStream = new MemoryStream();

            waveSource.StartRecording();
        }

        private void waveSource_DataAvailable(object sender, WaveInEventArgs e)
        {
            fileWriter.Write(e.Buffer, 0, e.BytesRecorded);
            sourceStream.Write(e.Buffer, 0, e.BytesRecorded);
        }

        private void btnPlay_Click(object sender, EventArgs e)
        {
            RSS = new RawSourceWaveStream(sourceStream, waveSource.WaveFormat);
            offsetSampleProvider = new OffsetSampleProvider(RSS.ToSampleProvider());
            offsetSampleProvider.SkipOver = TimeSpan.FromMilliseconds(0);
            offsetSampleProvider.Take = TimeSpan.FromMilliseconds(3000);
            outputSound.Init(offsetSampleProvider);
            outputSound.Play();
        }
    }
}

Answer 1

找到问题所在了

行后：

RSS = new RawSourceWaveStream(sourceStream, waveSource.WaveFormat);

我必须将 RawSourceWaveStream 的位置设置为 0。

RSS.Position = 0;

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