private static readonly string OutFile = "d:\\record.wav";  //臨時(shí)輸出文件
 
 // 讀取json配置文件，nuget拉取LumConfig，往期文章有介紹
 private static LumConfigManager con = new LumConfigManager("model.conf");

private static void Main()
{
    // 1. 加載模型
    // 輸入模型地址，model文件夾下面提供了一個(gè)tiny版模型可以直接用
    var wm = new WhisperManager((string)con.Get("modelPath")); 

    while (true)
    {
        bool started = false;
        Console.WriteLine("按 Space 開(kāi)始/停止錄音");

        while (true)
        {
            var key = Console.ReadKey(true).Key;
            if (key == ConsoleKey.Spacebar)
            {
                if (started)
                {
                    // 2. 開(kāi)始錄音
                    StopRec();
                    break;
                }
                else
                {
                    // 3. 結(jié)束錄音
                    StartRec();
                }
                started=!started;
            }
        }


        // 4. 轉(zhuǎn)文本 
        var res = wm.RunAsync(OutFile).GetAwaiter().GetResult();

        Console.WriteLine(res);             
    }
}

private static void StartRec()
{            
    waveIn = new WaveInEvent
    {
        DeviceNumber = 0,                      // 默認(rèn)麥克風(fēng)
        WaveFormat = new WaveFormat(16000, 1), // 44.1kHz 單聲道
        BufferMilliseconds = 100
    };

    writer = new WaveFileWriter(OutFile, waveIn.WaveFormat);

    // 數(shù)據(jù)到達(dá)事件
    waveIn.DataAvailable += (s, e) =>
    {
        writer.Write(e.Buffer, 0, e.BytesRecorded);
    };

    // 錄音停止事件（負(fù)責(zé)釋放 writer）
    waveIn.RecordingStopped += (s, e) =>
    {
        writer?.Dispose();
        writer = null;
        waveIn?.Dispose();
        waveIn = null;
        stop.Set();
    };

    waveIn.StartRecording();
    Console.WriteLine(">>> 正在錄音……");
}

private static void StopRec()
{
    Console.WriteLine("<<< 停止錄音");
    waveIn?.StopRecording();   // 觸發(fā) RecordingStopped 事件

    // 停止錄制時(shí)，流數(shù)據(jù)的處理不一定已經(jīng)完成
    // 我們額外使用一個(gè)信號(hào)量來(lái)實(shí)現(xiàn)簡(jiǎn)單的同步
    stop.WaitOne();  
}

internal class WhisperManager:IDisposable
{
    WhisperFactory whisperFactory;
    WhisperProcessor processor;


    public WhisperManager(string path)
    {
        whisperFactory = WhisperFactory.FromPath(path);
        processor = whisperFactory.CreateBuilder()
            .WithLanguage("zh")
            .WithPrompt("以下是，簡(jiǎn)體中文普通話的句子。")  // 否則大概率會(huì)輸出繁體中文
            .WithThreads(16)
            .Build();            
    }
    
    public async Task<string> RunAsync(string path)
    {
        try
        {
            var sb = new StringBuilder();
            using var fileStream = File.OpenRead(path);
            //  異步獲取識(shí)別后的分段結(jié)果
            await foreach (var seg in processor.ProcessAsync(fileStream))
            {
                var str = $"{seg.Start}->{seg.End}: {seg.Text}\r\n";
                sb.AppendLine(str);
                var per = (fileStream.Position / fileStream.Length*100).ToString("N2");
            }
            return sb.ToString();
        }
        catch (Exception ex)
        {
            return ex.Message;
        }
    }

    public void Dispose()
    {
        processor.Dispose();
        whisperFactory.Dispose();
    }
}

public void Execute()
{
    //using (Mp3FileReader reader = new Mp3FileReader("D:\\Documents\\Temp\\WhisperDesktop\\上午對(duì)接結(jié)構(gòu)錄音.mp3"))
    using (AudioFileReader reader = new AudioFileReader("D:\\Documents\\Temp\\WhisperDesktop\\錄音.m4a"))
    {
      // 16kHz, 16bit,單聲道
      var newFormat = new WaveFormat(16000, 16, 1); 
      using (var conversionStream = new WaveFormatConversionStream(newFormat, reader))
      {
          WaveFileWriter.CreateWaveFile("D:\\Documents\\Temp\\WhisperDesktop\\錄音.wav", conversionStream);
      }             
    }
}

public class SegmentData
{
    public string Text { get; } 文本

    public TimeSpan Start { get; }

    public TimeSpan End { get; }

    public float MinProbability { get; }

    public float MaxProbability { get; }

    public float Probability { get; }

    public string Language { get; }

    public WhisperToken[] Tokens { get; }

    public float NoSpeechProbability { get; }
}