欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

简单实用的PCM音频播放器--沉寂几年之后回归的第一份笔记

程序员文章站 2022-06-30 08:40:05
恢复内容开始 PCM音频网络流播放,至于用处,就不多解释了。 一个简单的类,基于NAudio,一个简单的拼装类,实例化时三个参数,依次是采样率,系统播放设备Index,播放声道,调用PlayData方法传入PCM的音频流即可,有流就传进去,数据断了,播放自动停。 接下来把代码贴出来: 1 publi ......

---恢复内容开始---

pcm音频网络流播放,至于用处,就不多解释了。

一个简单的类,基于naudio,一个简单的拼装类,实例化时三个参数,依次是采样率,系统播放设备index,播放声道,调用playdata方法传入pcm的音频流即可,有流就传进去,数据断了,播放自动停。

接下来把代码贴出来:

 1 public class pcmplayer
 2     {
 3         private monotostereoprovider16 monotostereoprovider16;
 4         private bufferedwaveprovider bufferedwaveprovider;
 5         private waveout waveout;
 6         private bool isrunning = false;
 7         private pcmplayerchannel currentchannel;
 8 
 9         /// <summary>
10         /// 
11         /// </summary>
12         /// <param name="samplerate">采样率8k至64k</param>
13         /// <param name="devicenumber">通过getplaydevices来获取字典的key值</param>
14         /// <param name="playerchannel">初始化时播放的声道</param>
15         public pcmplayer(int samplerate, int devicenumber = 0, pcmplayerchannel playerchannel = pcmplayerchannel.both)
16         {
17             currentchannel = playerchannel;
18             waveformat = new waveformat(samplerate, 16, 1);
19             bufferedwaveprovider = new bufferedwaveprovider(waveformat);
20             monotostereoprovider16 = new monotostereoprovider16(bufferedwaveprovider);
21             waveout = new waveout();
22             waveout.devicenumber = devicenumber;
23             waveout.init(monotostereoprovider16);
24             waveout.play();
25             isrunning = true;
26         }
27 
28         public void playdata(byte[] data)
29         {
30             if (!isrunning) return;
31             bufferedwaveprovider.addsamples(data, 0, data.length);
32         }
33 
34         public void closeplay()
35         {
36             isrunning = false;
37             waveout.stop();
38             waveout.dispose();
39         }
40 
41         public bool setplaychannel(pcmplayerchannel playerchannel)
42         {
43             if (!isrunning || waveout == null || monotostereoprovider16 == null) return false;
44             switch (playerchannel)
45             {
46                 case pcmplayerchannel.left:
47                     {
48                         monotostereoprovider16.leftvolume = 1.0f;
49                         monotostereoprovider16.rightvolume = 0.0f;
50                     }
51                     break;
52                 case pcmplayerchannel.right:
53                     {
54                         monotostereoprovider16.leftvolume = 0.0f;
55                         monotostereoprovider16.rightvolume = 1.0f;
56                     }
57                     break;
58                 case pcmplayerchannel.both:
59                     {
60                         monotostereoprovider16.leftvolume = 1.0f;
61                         monotostereoprovider16.rightvolume = 1.0f;
62                     }
63                     break;
64                 default: return false;
65             }
66             return true;
67         }
68 
69         public waveformat waveformat { get; private set; }
70 
71         public static dictionary<int, waveoutcapabilities> getplaydevices
72         {
73             get
74             {
75                 dictionary<int, waveoutcapabilities> result = new dictionary<int, waveoutcapabilities>();
76                 try
77                 {
78                     int count = waveout.devicecount;
79                     for (int i = 0; i < count; i++)
80                     {
81                         var item = waveout.getcapabilities(i);
82                         result.add(i, item);
83                     }
84                 }
85                 catch { }
86                 return result;
87             }
88         }
89     }
90 
91     public enum pcmplayerchannel
92     {
93         left,
94         right,
95         both
96     }

 

预告:下一篇简单讲一下音频流网络传输时压缩与解压(基于nspeex的音频10倍压缩,肉耳听不出损耗)