unity wav 格式音频转换为二进制文件

/// 音频WAV格式的字节数组/// </summary>/// <returns>The to WA.</returns>/// <param name="clip">Clip.</param>public static byte[] EncodeToWAV(this AudioClip clip){byte[] bytes = null;using (var memoryStream = new MemoryStream()){memoryStream.Write(new byte[44], 0, 44);//预留44字节头部信息byte[] bytesData = clip.GetData16();memoryStream.Write(bytesData, 0, bytesData.Length);memoryStream.Seek(0, SeekOrigin.Begin);byte[] riff = System.Text.Encoding.UTF8.GetBytes("RIFF");memoryStream.Write(riff, 0, 4);byte[] chunkSize = BitConverter.GetBytes(memoryStream.Length - 8);memoryStream.Write(chunkSize, 0, 4);byte[] wave = System.Text.Encoding.UTF8.GetBytes("WAVE");memoryStream.Write(wave, 0, 4);byte[] fmt = System.Text.Encoding.UTF8.GetBytes("fmt ");memoryStream.Write(fmt, 0, 4);byte[] subChunk1 = BitConverter.GetBytes(16);memoryStream.Write(subChunk1, 0, 4);UInt16 two = 2;UInt16 one = 1;byte[] audioFormat = BitConverter.GetBytes(one);memoryStream.Write(audioFormat, 0, 2);byte[] numChannels = BitConverter.GetBytes(clip.channels);memoryStream.Write(numChannels, 0, 2);byte[] sampleRate = BitConverter.GetBytes(clip.frequency);memoryStream.Write(sampleRate, 0, 4);byte[] byteRate = BitConverter.GetBytes(clip.frequency * clip.channels * 2); // sampleRate * bytesPerSample*number of channelsmemoryStream.Write(byteRate, 0, 4);UInt16 blockAlign = (ushort)(clip.channels * 2);memoryStream.Write(BitConverter.GetBytes(blockAlign), 0, 2);UInt16 bps = 16;byte[] bitsPerSample = BitConverter.GetBytes(bps);memoryStream.Write(bitsPerSample, 0, 2);byte[] datastring = System.Text.Encoding.UTF8.GetBytes("data");memoryStream.Write(datastring, 0, 4);byte[] subChunk2 = BitConverter.GetBytes(clip.samples * clip.channels * 2);memoryStream.Write(subChunk2, 0, 4);bytes = memoryStream.ToArray();}return bytes;}