using NAudio.Wave;
using System;
 
public class AudioResampler
{
    public static void ConvertTo16kHz(string inputFile, string outputFile)
    {
        // 打開(kāi)原始音頻文件
        using (var reader = new WaveFileReader(inputFile))
        {
            // 創(chuàng)建目標(biāo)音頻格式 16kHz，單聲道，16位
            var targetFormat = new WaveFormat(16000, 1); // 16000Hz, Mono, 16-bit
 
            // 創(chuàng)建轉(zhuǎn)換流，使用 WaveFormatConversionStream 進(jìn)行重采樣
            using (var conversionStream = new WaveFormatConversionStream(targetFormat, reader))
            {
                // 將轉(zhuǎn)換后的音頻數(shù)據(jù)寫(xiě)入新文件
                WaveFileWriter.CreateWaveFile(outputFile, conversionStream);
                Console.WriteLine("文件已轉(zhuǎn)換為 16kHz 格式");
            }
        }
    }
}
 
// 使用示例
class Program
{
    static void Main(string[] args)
    {
        string inputFile = @"path_to_input_file.wav";  // 輸入文件路徑
        string outputFile = @"path_to_output_file_16kHz.wav";  // 輸出文件路徑
        AudioResampler.ConvertTo16kHz(inputFile, outputFile);
    }
}

public async Task Analyze()
{
    //模型
    string modelFilePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "ggml-medium-q8_0.bin");
    // 初始化Whisper工廠和處理器
    var whisperFactory = WhisperFactory.FromPath(modelFilePath);
    var processor = whisperFactory.CreateBuilder()
        .WithLanguage("zh") // 設(shè)置識(shí)別的語(yǔ)言為中文
        .Build();
    try
    {
        string audioFileName = "path_to_output_file_16kHz.wav";
        string audioFilePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, audioFileName);
        // 讀取音頻文件
        using var audioStream = File.OpenRead(audioFilePath);
 
        // 處理音頻文件并輸出結(jié)果
        Console.WriteLine("Transcribing audio file...");
 
        await foreach (SegmentData result in processor.ProcessAsync(audioStream, default))
        {
            Console.WriteLine($"{result.Start}->{result.End}: {result.Text}");
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine($"An error occurred: {ex.Message}");
    }
    Console.WriteLine("Press any key to exit...");
}

string modelFilePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "ggml-medium-q8_0.bin");