App_V2.3/SourceCode/TextToSpeechService/SpeechHelper.cs

using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Speech.AudioFormat;
using System.Speech.Recognition;
using System.Speech.Synthesis;

namespace TextToSpeechService;

public class SpeechHelper
{
    public static void TTS(MemoryStream ms,string txt ,int? rate,int? vol)
    {
        // 只能在Windows平台运行
        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) 
        {
            return;
        }
        using var synthesizer = new SpeechSynthesizer();
        synthesizer.Rate = rate ?? 0;
        synthesizer.Volume = vol ?? 90;
        synthesizer.SetOutputToWaveStream(ms);
        synthesizer.Speak(txt);

    }
    public static string SST(MemoryStream ms)
    {
        // 只能在Windows平台运行
        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
        {
            return "";
        }
        var recognizer = new SpeechRecognitionEngine(new System.Globalization.CultureInfo("zh-CN"));
        recognizer.SetInputToWaveStream(ms);
        recognizer.InitialSilenceTimeout = TimeSpan.FromSeconds(500);
        RecognitionResult result = recognizer.Recognize();
        return result.Text;
    }
    public static string SST(byte[] bytes)
    {
        // 只能在Windows平台运行
        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
        {
            return "";
        }
        //foreach (var x in SpeechRecognitionEngine.InstalledRecognizers())
        //{
        //    Debug.WriteLine(x.Culture.Name);
        //}
        using var recognizer = new SpeechRecognitionEngine(new System.Globalization.CultureInfo("zh-CN"));
        recognizer.LoadGrammar(new DictationGrammar());
        //string inFile = AppDomain.CurrentDomain.BaseDirectory + "/test/demo.wav";
        //recognizer.SetInputToWaveFile(inFile);
        recognizer.SetInputToWaveStream(new MemoryStream(bytes));
        recognizer.InitialSilenceTimeout = TimeSpan.FromSeconds(0);
        RecognitionResult result = recognizer.Recognize();
        return result?.Text ?? "";
    }
}