ModelingDebug/ModelingMusic/MusicDebug.cs

using NAudio.Wave;

namespace Debug.ModelingMusic;
public class MusicDebug
{

    /// <summary>
    /// 默认模式
    /// </summary>
    public static void Default()
    {
        do
        {
            var keyInfo = Console.ReadKey(true);
            // // 输出按下的键的信息，这里只是为了演示
            if (keyInfo.Key == ConsoleKey.Escape)
            {
                Console.Clear();
                //关闭程序
                Environment.Exit(0);
                break;
            }
            char keyChar = keyInfo.KeyChar;
            if ((keyChar >= 'A' && keyChar <= 'Z') || (keyChar >= 'a' && keyChar <= 'z'))
            {
                new Thread(() => Music.Down(keyChar)).Start();
            }
        } while (Program.IsWhile);
    }

    /// <summary>
    /// 随机下落测试模式
    /// </summary>
    public static void DebugDefault()
    {
        Console.Clear();
        var random = new Random();

        while (Program.IsWhile)
        {
            //随机生成 a-z和A-Z
            var ch = (char)(random.Next(26) + 65);
            new Thread(() => Music.Down(ch)).Start();

            //随机暂停
            Thread.Sleep(random.Next(1000));
        }
    }

    /// <summary>
    /// 指定下落字符串
    /// </summary>
    public static void DesignateDown(char[] ch)
    {
        Console.Clear();
        var random = new Random();

        while (Program.IsWhile)
        {
            for (int v = 0; v < ch.Length; v++)
            {
                new Thread(() => Music.Down(ch[v])).Start();
                //随机暂停
                Thread.Sleep(random.Next(1000));
            }
        }
    }
    /// <summary>
    /// 随机指定下落字符串
    /// </summary>
    public static void DesignateRandmoDown(char[] ch)
    {
        Console.Clear();
        var random = new Random();

        while (Program.IsWhile)
        {
            int v = random.Next(0, ch.Length);
            new Thread(() => Music.Down(ch[v])).Start();
            //随机暂停
            Thread.Sleep(random.Next(600));
        }
    }

    public static void MusicRhythm()
    {

        var cap = new WasapiLoopbackCapture();
        cap.DataAvailable += (sender, e) =>
        {
            // Console.Clear();
            // Console.WriteLine(e.BytesRecorded + "  " + e.Buffer.Length);
            float[] allSamples = Enumerable
                .Range(0, e.BytesRecorded / 4)
                .Select(i => BitConverter.ToSingle(e.Buffer, i * 4))
                .ToArray();
            int channelCount = cap.WaveFormat.Channels;
            float[][] channelSamples = Enumerable
                .Range(0, channelCount)
                .Select(channel => Enumerable
                    .Range(0, allSamples.Length / channelCount)
                    .Select(i => allSamples[channel + i * channelCount])
                    .ToArray())
                .ToArray();

            float[] averageSamples = Enumerable
                .Range(0, allSamples.Length / channelCount)
                .Select(index => Enumerable
                    .Range(0, channelCount)
                    .Select(channel => channelSamples[channel][index])
                    .Average())
                .ToArray();

            float rmsVolume = CalculateRMS(averageSamples);
            // Console.WriteLine("RMS Volume: " + rmsVolume);
            DrawVolumeBar(rmsVolume);
            Thread.Sleep(100);
        };
        cap.StartRecording();
    }

    static float CalculateRMS(float[] samples)
    {
        if (samples.Length == 0) return 0;
        float sumOfSquares = samples.Sum(sample => sample * sample);
        return (float)Math.Sqrt(sumOfSquares / samples.Length);
    }

    static void DrawVolumeBar(float rmsVolume)
    {
        int barLength = Program.chars.GetLength(1); // 控制条长度
        int filledLength = Math.Min((int)(rmsVolume * 1000), barLength);
        for (int x = 0; x < Program.chars.GetLength(1); x++)
        {
            Program.chars[9, x].Color = ConsoleColor.DarkCyan;
            if (x < filledLength)
            {

                Program.chars[9, x].Char = '#'; // 绘制音量条
            }
            else
            {
                Program.chars[9, x].Char = Program.ShowChar;
            }
        }
    }
    public static void MusicRhythm(FileInfo file)
    {
        // 创建一个 WasapiLoopbackCapture 对象来捕获系统音频输出
        using (var capture = new WasapiLoopbackCapture())
        {
            // 创建一个 WaveFileWriter 用于保存捕获的音频到文件
            using (var writer = new WaveFileWriter(file.FullName, capture.WaveFormat))
            {
                // 订阅 DataAvailable 事件，处理捕获到的音频数据
                capture.DataAvailable += (s, e) =>
                {
                    // 将捕获的音频数据写入文件
                    writer.Write(e.Buffer, 0, e.BytesRecorded);
                };

                // 启动音频捕获
                capture.StartRecording();

                Console.WriteLine("正在捕获音频... 按任意键停止。");
                Console.ReadKey();

                // 停止音频捕获
                capture.StopRecording();
            }
        }
    }


}