使用C#检测WAV文件中的音频静音

using System;
using System.IO;

public class WavFileAudioDetector
{
    public static bool IsAudioSilent(string filePath)
    {
        using var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
        using var reader = new BinaryReader(fileStream);

        // 读取WAV文件头
        string header = new string(reader.ReadChars(4));
        if (header != "RIFF")
        {
            throw new InvalidDataException("Invalid WAV file header");
        }

        // 跳过文件大小和格式
        reader.ReadInt32();
        reader.ReadChars(4);

        // 读取fmt块
        string fmtHeader = new string(reader.ReadChars(4));
        if (fmtHeader != "fmt ")
        {
            throw new InvalidDataException("Invalid WAV file format header");
        }

        // 跳过fmt块大小和格式
        reader.ReadInt32();
        reader.ReadInt16();

        // 读取通道数
        int channels = reader.ReadInt16();

        // 跳过采样率、数据速率和块对齐
        reader.ReadInt32();
        reader.ReadInt32();
        reader.ReadInt16();

        // 读取位深
        int bitsPerSample = reader.ReadInt16();

        // 读取data块
        string dataHeader = new string(reader.ReadChars(4));
        if (dataHeader != "data")
        {
            throw new InvalidDataException("Invalid WAV file data header");
        }

        // 跳过data块大小
        reader.ReadInt32();

        // 读取音频数据
        int bytesPerSample = bitsPerSample / 8;
        int bytesPerFrame = bytesPerSample * channels;
        byte[] frame = new byte[bytesPerFrame];
        int frameCount = 0;
        long totalSamples = fileStream.Length / bytesPerFrame;
        double sumSquares = 0;

        while (frameCount< totalSamples)
        {
            reader.Read(frame, 0, bytesPerFrame);

            for (int i = 0; i< bytesPerFrame; i += bytesPerSample)
            {
                double sample = 0;

                if (bitsPerSample == 8)
                {
                    sample = frame[i];
                }
                else if (bitsPerSample == 16)
                {
                    sample = BitConverter.ToInt16(frame, i);
                }
                else if (bitsPerSample == 24)
                {
                    sample = BitConverter.ToInt32(frame, i) & 0xFFFFFF;
                }
                else if (bitsPerSample == 32)
                {
                    sample = BitConverter.ToInt32(frame, i);
                }

                sumSquares += sample * sample;
            }

            frameCount++;
        }

        double rms = Math.Sqrt(sumSquares / (totalSamples * channels));
        double threshold = 0.0005;

        return rms <= threshold;
    }
}