NAudio 播放录音文件中的部分音频
NAudio Play part of audio from recording file
使用 NAudio,在将音频录制到文件时,我需要使用 offsetSampleProvider.SkipOver / offsetSampleProvider.Take
播放该文件的一部分
问题是我无法使用 AudioFileReader 打开文件,因为它已被 WaveFileWriter 使用。
我找到了解决方案。
这是源代码。
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);
RSS.Position = 0;
offsetSampleProvider = new OffsetSampleProvider(RSS.ToSampleProvider());
offsetSampleProvider.SkipOver = TimeSpan.FromMilliseconds(0);
offsetSampleProvider.Take = TimeSpan.FromMilliseconds(3000);
outputSound.Init(offsetSampleProvider);
outputSound.Play();
}
}
}
使用 NAudio,在将音频录制到文件时,我需要使用 offsetSampleProvider.SkipOver / offsetSampleProvider.Take
播放该文件的一部分问题是我无法使用 AudioFileReader 打开文件,因为它已被 WaveFileWriter 使用。
我找到了解决方案。
这是源代码。
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);
RSS.Position = 0;
offsetSampleProvider = new OffsetSampleProvider(RSS.ToSampleProvider());
offsetSampleProvider.SkipOver = TimeSpan.FromMilliseconds(0);
offsetSampleProvider.Take = TimeSpan.FromMilliseconds(3000);
outputSound.Init(offsetSampleProvider);
outputSound.Play();
}
}
}