如何将NAudio WaveStream写入内存流？

Question

我有一个程序，需要在一个字节数组中的MP3数据。它必须将该mp3数据转换为wav格式并将其存储在一个字节数据中。我正在尝试为此使用NAudio。我正在使用下面的代码来达到这个目的。

Stream inputStream = ...; 
Stream outputStream = ...; 

using (WaveStream waveStream = WaveFormatConversionStream.CreatePcmStream(new Mp3FileReader(inputStream))) 
using (WaveFileWriter waveFileWriter = new WaveFileWriter(outputStream, waveStream.WaveFormat)) 
{ 
    byte[] bytes = new byte[waveStream.Length]; 
    waveStream.Read(bytes, 0, waveStream.Length); 
    waveFileWriter.WriteData(bytes, 0, bytes.Length); 
    waveFileWriter.Flush(); 
} 

当我运行上面的代码时，我收到的所有字节数组都是0。但是如果使用WaveFileWriter将数据直接写入文件，则文件将接收到正确的数据。有什么理由？

Answer 1

试试这个：

using (WaveStream waveStream = WaveFormatConversionStream.CreatePcmStream(new Mp3FileReader(inputStream))) 
using (WaveFileWriter waveFileWriter = new WaveFileWriter(outputStream, waveStream.WaveFormat)) 
{ 
    byte[] bytes = new byte[waveStream.Length]; 
    waveStream.Position = 0; 
    waveStream.Read(bytes, 0, waveStream.Length); 
    waveFileWriter.WriteData(bytes, 0, bytes.Length); 
    waveFileWriter.Flush(); 
}