1. 項目實現(xiàn)功能：在unity3D中通過Microphone的API實現(xiàn)錄音功能，并將真正時長的錄音文件以”.wav“格式保存到本地。

2. 環(huán)境：Win10     unity版本：2018.2.15f1             VS版本：2017

3. 界面展示

4. 說明：要提前了解.wav文件的格式

   

5. 根據(jù).wav文件格式，需要對錄音的聲音流進行重新編碼。

6. 代碼

1. using UnityEngine;
2. using UnityEngine.UI;
3. using System;
4. using System.IO;
6. public class TestMicro : MonoBehaviour {
7. private bool micConnected = false;//麥克風(fēng)是否連接
8. private int minFreq, maxFreq;//最小和最大頻率
9. public AudioClip RecordedClip;//錄音
10. public AudioSource audioSource;//播放的音頻
11. public Text Infotxt;//提示信息
12. public Text Adress;//音頻保存地址
13. private string fileName;//保存的文件名
14. private byte[] data;
15. private void Start()
16. {
17. if (Microphone.devices.Length <= 0)
18. {
19. Infotxt.text = "缺少麥克風(fēng)設(shè)備！";
20. }
21. else
22. {
23. Infotxt.text = "設(shè)備名稱為："+Microphone.devices[0].ToString()+"請點擊Start開始錄音！";
24. micConnected = true;
25. Microphone.GetDeviceCaps(null, out minFreq, out maxFreq);
26. if (minFreq == 0 && maxFreq == 0)
27. {
28. maxFreq = 44100;
29. }
30. }
31. }
32. /// <summary>
33. /// 開始錄音
34. /// </summary>
35. public void Begin()
36. {
37. if (micConnected)
38. {
39. if (!Microphone.IsRecording(null))
40. {
41. RecordedClip = Microphone.Start(null, false, 60, maxFreq);
42. Infotxt.text = "開始錄音！";
43. }
44. else
45. {
46. Infotxt.text = "正在錄音中，請勿重復(fù)點擊Start！";
47. }
48. }
49. else
50. {
51. Infotxt.text = "請確認(rèn)麥克風(fēng)設(shè)備是否已連接！";
52. }
53. }
54. /// <summary>
55. /// 停止錄音
56. /// </summary>
57. public void Stop()
58. {
59. data = GetRealAudio(ref RecordedClip);
60. Microphone.End(null);
61. Infotxt.text = "錄音結(jié)束！";
63. }
64. /// <summary>
65. /// 播放錄音
66. /// </summary>
67. public void Player()
68. {
69. if (!Microphone.IsRecording(null))
70. {
71. audioSource.clip = RecordedClip;
72. audioSource.Play();
73. Infotxt.text = "正在播放錄音！";
74. }
75. else
76. {
77. Infotxt.text = "正在錄音中，請先停止錄音！";
78. }
79. }
80. /// <summary>
81. /// 保存錄音
82. /// </summary>
83. public void Save()
84. {
85. if (!Microphone.IsRecording(null))
86. {
87. fileName = DateTime.Now.ToString("yyyyMMddHHmmssffff");
88. if (!fileName.ToLower().EndsWith(".wav"))
89. {//如果不是“.wav”格式的，加上后綴
90. fileName += ".wav";
91. }
92. string path= Path.Combine(Application.persistentDataPath, fileName);//錄音保存路徑
93. print(path);//輸出路徑
94. Adress.text = path;
95. using (FileStream fs = CreateEmpty(path))
96. {
97. fs.Write(data, 0, data.Length);
98. WriteHeader(fs, RecordedClip); //wav文件頭
99. }
100. }
101. else
102. {
103. Infotxt.text = "正在錄音中，請先停止錄音！";
104. }
105. }
106. /// <summary>
107. /// 獲取真正大小的錄音
108. /// </summary>
109. /// <param name="recordedClip"></param>
110. /// <returns></returns>
111. public static byte[] GetRealAudio(ref AudioClip recordedClip)
112. {
113. int position = Microphone.GetPosition(null);
114. if (position <= 0 || position > recordedClip.samples)
115. {
116. position = recordedClip.samples;
117. }
118. float[] soundata = new float[position * recordedClip.channels];
119. recordedClip.GetData(soundata, 0);
120. recordedClip = AudioClip.Create(recordedClip.name, position,
121. recordedClip.channels, recordedClip.frequency, false);
122. recordedClip.SetData(soundata, 0);
123. int rescaleFactor = 32767;
124. byte[] outData = new byte[soundata.Length * 2];
125. for (int i = 0; i < soundata.Length; i++)
126. {
127. short temshort = (short)(soundata[i] * rescaleFactor);
128. byte[] temdata = BitConverter.GetBytes(temshort);
129. outData[i * 2] = temdata[0];
130. outData[i * 2 + 1] = temdata[1];
131. }
132. Debug.Log("position=" + position + " outData.leng=" + outData.Length);
133. return outData;
134. }
135. /// <summary>
136. /// 寫文件頭
137. /// </summary>
138. /// <param name="stream"></param>
139. /// <param name="clip"></param>
140. public static void WriteHeader(FileStream stream, AudioClip clip)
141. {
142. int hz = clip.frequency;
143. int channels = clip.channels;
144. int samples = clip.samples;
146. stream.Seek(0, SeekOrigin.Begin);
148. Byte[] riff = System.Text.Encoding.UTF8.GetBytes("RIFF");
149. stream.Write(riff, 0, 4);
151. Byte[] chunkSize = BitConverter.GetBytes(stream.Length - 8);
152. stream.Write(chunkSize, 0, 4);
154. Byte[] wave = System.Text.Encoding.UTF8.GetBytes("WAVE");
155. stream.Write(wave, 0, 4);
157. Byte[] fmt = System.Text.Encoding.UTF8.GetBytes("fmt ");
158. stream.Write(fmt, 0, 4);
160. Byte[] subChunk1 = BitConverter.GetBytes(16);
161. stream.Write(subChunk1, 0, 4);
163. UInt16 one = 1;
165. Byte[] audioFormat = BitConverter.GetBytes(one);
166. stream.Write(audioFormat, 0, 2);
168. Byte[] numChannels = BitConverter.GetBytes(channels);
169. stream.Write(numChannels, 0, 2);
171. Byte[] sampleRate = BitConverter.GetBytes(hz);
172. stream.Write(sampleRate, 0, 4);
174. Byte[] byteRate = BitConverter.GetBytes(hz * channels * 2);
175. stream.Write(byteRate, 0, 4);
177. UInt16 blockAlign = (ushort)(channels * 2);
178. stream.Write(BitConverter.GetBytes(blockAlign), 0, 2);
180. UInt16 bps = 16;
181. Byte[] bitsPerSample = BitConverter.GetBytes(bps);
182. stream.Write(bitsPerSample, 0, 2);
184. Byte[] datastring = System.Text.Encoding.UTF8.GetBytes("data");
185. stream.Write(datastring, 0, 4);
187. Byte[] subChunk2 = BitConverter.GetBytes(samples * channels * 2);
188. stream.Write(subChunk2, 0, 4);
189. }
190. /// <summary>
191. /// 創(chuàng)建wav格式文件頭
192. /// </summary>
193. /// <param name="filepath"></param>
194. /// <returns></returns>
195. private FileStream CreateEmpty(string filepath)
196. {
197. FileStream fileStream = new FileStream(filepath, FileMode.Create);
198. byte emptyByte = new byte();
200. for (int i = 0; i < 44; i++) //為wav文件頭留出空間
201. {
202. fileStream.WriteByte(emptyByte);
203. }
205. return fileStream;
206. }
207. }

7. 可執(zhí)行文件（有個bug目前還沒修改，不過不影響使用）：

bug：當(dāng)沒有錄音的時候，點擊save也會出現(xiàn)保存文件的地址，可以在Save（）方法中判斷一下if（recordedclip！=null）

可執(zhí)行文件下載地址：https://download.csdn.net/download/qq_40878840/12942233