无法在 LINUX 上使用 NAudio 生成峰值

Question

我正在尝试在 Linux dotnet core 6.0 上使用 NAudio 生成峰值（.mp3 音频），使用此代码（如下所示）在 wavesurfers.js中使用：

using(var reader = new AudioFileReader(file))
{
    var samples = reader.Length / (reader.WaveFormat.Channels * reader.WaveFormat.BitsPerSample / 8);

    var max = 0.0f;
    // waveform will be a maximum of 4000 pixels wide:
    var batch = (int)Math.Max(40, samples / 4000);
  
    float[] buffer = new float[batch];
    int read;
    
    while((read = reader.Read(buffer,0,batch)) == batch)
    {
        for(int n = 0; n < read; n++)
        {
            max = Math.Max(Math.Abs(buffer[n]), max);
        };
        console.write(max);//peak ex: 0.342424, this can be store in array or .peak file 
      console.write(',');
        max = 0;    
        
    }
}

Unhandled exception. System.DllNotFoundException: Unable to load shared library 'Msacm32.dll' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libMsacm32.dll: cannot open shared object file: No such file or directory
   at NAudio.Wave.Compression.AcmInterop.acmFormatSuggest2(IntPtr hAcmDriver, IntPtr sourceFormatPointer, IntPtr destFormatPointer, Int32 sizeDestFormat, AcmFormatSuggestFlags suggestFlags)
   at NAudio.Wave.Compression.AcmStream.SuggestPcmFormat(WaveFormat compressedFormat)
   at NAudio.Wave.AcmMp3FrameDecompressor..ctor(WaveFormat sourceFormat)
   at NAudio.Wave.Mp3FileReader.CreateAcmFrameDecompressor(WaveFormat mp3Format)
   at NAudio.Wave.Mp3FileReaderBase..ctor(Stream inputStream, FrameDecompressorBuilder frameDecompressorBuilder, Boolean ownInputStream)
   at NAudio.Wave.Mp3FileReader..ctor(String mp3FileName)
   at NAudio.Wave.AudioFileReader.CreateReaderStream(String fileName)
   at NAudio.Wave.AudioFileReader..ctor(String fileName)
   at Program.<Main>$(String[] args) in /home/adil/Blob Test/Program.cs:line 288

我开始知道 NAudio 只能在 Windows 上运行。有些地方建议我可以使用 NAudio.Core。 NAudio.Core 到底是什么？我对 C# 非常陌生，试图了解如何使用 NAudio.Core，但找不到相关文档或任何说明。

如果不可能，是否有任何其他方法或包可以用来实现这一目标，最好是 MIT ？ （由于许可限制，我无法使用音频波形）。

Answer 1

您可以直接使用

Mp3FileReader

并使用NLayer进行帧解压缩。更多信息这里。

此代码片段展示了如何使用它将 MP3 文件转换为 WAV：

using (var reader = new Mp3FileReader(infile, wf => new Mp3FrameDecompressor(wf)))
{
    WaveFileWriter.CreateWaveFile(outfile, reader);
}

Answer 2

首先，nuget安装NLayer

https://github.com/naudio/NLayer

然后

using NAudio.Wave;
using NLayer.NAudioSupport;

var fileName = "your_file.mp3";
var builder = new Mp3FileReader.FrameDecompressorBuilder(wf => new Mp3FrameDecompressor(wf));
var reader = new Mp3FileReaderBase(fileName, builder);

问题就解决了。