c# - 如何将 NAudio WaveStream 写入内存流？

Question

我有一个程序以字节数组的形式接收 mp3 数据。它必须将该 mp3 数据转换为 wav 格式并将其存储在字节数据中。为此，我正在尝试使用 NAudio。为此，我使用以下代码。

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，我收到的字节数组中只有 0。但如果使用 WaveFileWriter 将数据直接写入文件，则文件会收到正确的数据。有什么原因吗？

Answer 1

试一试:

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(); 
}