Flash Actionscript 2.0 在 FMS 中检测麦克风 摄像头状态的类

1 /**
2 * @author rison
3 * @data 2006-05-20
4 * @version 1.1
5 * @usage setting for camera and mic in FMS application
6 */
7 class SettingCheck {
8     private var video:Video;
9     private var user_cam:Camera;
10     public var addListener:Function;
11     public var removeListener:Function;
12     private var broadcastMessage:Function;
13     private static var broadcastInit:Object = AsBroadcaster.initialize
14
15 (SettingCheck.prototype);
16     public function SettingCheck(target_video:Video) {
17         video = target_video;
18         user_cam = Camera.get();
19     }
20     public function startCheck():Void {
21         //开始检测
22         broadcastMessage("onStarted");
23         checkMic();
24     }
25     private function checkMic():Void {
26         var micArray:Array = Microphone.names;
27         var camArray:Array = Camera.names;
28         if (micArray.length<1) {
29             //系统没有可以使用的mic
30             broadcastMessage("onMicNotFound");
31         } else {
32             if (camArray.length<1) {
33                 //系统没有可以使用的cam
34                 broadcastMessage("onCamNotFound");
35             } else {
36                 checkAllowable();
37             }
38         }
39     }
40     private function checkAllowable():Void {
41         var owner:Object = this;
42         var user_mic:Microphone = Microphone.get();
43         var test_nc:NetConnection = new NetConnection();
44         test_nc.connect(null);
45         var test_ns:NetStream = new NetStream(test_nc);
46         test_ns.attachAudio(user_mic);
47         user_mic.onStatus = function(infoObj) {
48             trace(infoObj.code);
49             if (infoObj.code == "Microphone.Unmuted") {
50                 test_ns.attachAudio(null);
51                 test_ns.close();
52                 owner.checkCamBusy();
53             } else {
54                 //mic 与 cam的使用被用户主动禁止
55                 owner.broadcastMessage("onCamBlockedByUser");
56             }
57         };
58         if (user_mic.muted || user_cam.muted) {
59             //系统目前不允许使用mic 与 cam
60             broadcastMessage("onCamBlocked");
61         } else {
62             test_ns.attachAudio(null);
63             test_ns.close();
64             checkCamBusy();
65         }
66     }
67     private function checkCamBusy():Void {
68         //cam目前被其他视频程序占用
69         broadcastMessage("onCheckCamBusy");
70         video.attachVideo(user_cam);
71         var owner:Object = this;
72         var chkTime:Number = 0;
73         var intervalID:Number;
74         function callback() {
75             trace(owner.user_cam.currentFps);
76             if (owner.user_cam.currentFps>0) {
77                 owner.broadcastMessage("onFinished");
78                 clearInterval(intervalID);
79             } else {
80                 chkTime++;
81                 if (chkTime>30) {
82                     owner.broadcastMessage("onCamBusy");
83                     clearInterval(intervalID);
84                 }
85             }
86         }
87         intervalID = setInterval(callback, 50);
88     }
89 }
90