unity wav 格式音频转 写入本地

public static void Save(AudioClip clip, string path){string filePath = Path.GetDirectoryName(path);if (!Directory.Exists(filePath)){Directory.CreateDirectory(filePath);}using (FileStream fileStream = CreateEmpty(path)){ConvertAndWrite(fileStream, clip);WriteHeader(fileStream, clip);}}private static void ConvertAndWrite(FileStream fileStream, AudioClip clip){float[] samples = new float[clip.samples];clip.GetData(samples, 0);Int16[] intData = new Int16[samples.Length]; Byte[] bytesData = new Byte[samples.Length * 2];int rescaleFactor = 32767; //to convert float to Int16  for (int i = 0; i < samples.Length; i++){intData[i] = (short)(samples[i] * rescaleFactor);Byte[] byteArr = new Byte[2];byteArr = BitConverter.GetBytes(intData[i]);byteArr.CopyTo(bytesData, i * 2);} fileStream.Write(bytesData, 0, bytesData.Length);}private static FileStream CreateEmpty(string filepath){FileStream fileStream = new FileStream(filepath, FileMode.Create);byte emptyByte = new byte();for (int i = 0; i < 44; i++) //preparing the header  {fileStream.WriteByte(emptyByte);}return fileStream;}private static void WriteHeader(FileStream stream, AudioClip clip){ int hz = clip.frequency;int channels = clip.channels;int samples = clip.samples;stream.Seek(0, SeekOrigin.Begin);Byte[] riff = System.Text.Encoding.UTF8.GetBytes("RIFF");stream.Write(riff, 0, 4);Byte[] chunkSize = BitConverter.GetBytes(stream.Length - 8);stream.Write(chunkSize, 0, 4);Byte[] wave = System.Text.Encoding.UTF8.GetBytes("WAVE");stream.Write(wave, 0, 4);Byte[] fmt = System.Text.Encoding.UTF8.GetBytes("fmt ");stream.Write(fmt, 0, 4);Byte[] subChunk1 = BitConverter.GetBytes(16);stream.Write(subChunk1, 0, 4);UInt16 two = 2;UInt16 one = 1;Byte[] audioFormat = BitConverter.GetBytes(one);stream.Write(audioFormat, 0, 2);Byte[] numChannels = BitConverter.GetBytes(channels);stream.Write(numChannels, 0, 2);Byte[] sampleRate = BitConverter.GetBytes(hz);stream.Write(sampleRate, 0, 4);Byte[] byteRate = BitConverter.GetBytes(hz * channels * 2); // sampleRate * bytesPerSample*number of channels, here 44100*2*2  stream.Write(byteRate, 0, 4);UInt16 blockAlign = (ushort)(channels * 2);stream.Write(BitConverter.GetBytes(blockAlign), 0, 2);UInt16 bps = 16;Byte[] bitsPerSample = BitConverter.GetBytes(bps);stream.Write(bitsPerSample, 0, 2);Byte[] datastring = System.Text.Encoding.UTF8.GetBytes("data");stream.Write(datastring, 0, 4);Byte[] subChunk2 = BitConverter.GetBytes(samples * channels * 2);stream.Write(subChunk2, 0, 4);}