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Example of web phone for video calls

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Code of the example

The path to the source code of the example on WCS server is:

/usr/local/FlashphonerWebCallServer/client/examples/demo/sip/phone-video

phone-video.css - file with styles
phone-video.html - page of the web phone
call-fieldset.html - form with fields required for connection
call-controls.html - HTML code for call controls
phone-video.js - script providing functionality for the web phone

This example can be tested using the following address:

https://host:8888/client/examples/demo/sip/phone-video/phone-video.html

Here host is the address of the WCS server.

Work with code of the web phone

To analyze the code, let's take the version of file phone-video.js with hash 26fc5afa246baea80867fa011305da811edab1f0, which is available here and can be downloaded with corresponding build 0.5.5.1894.

1. Initialization of the API. line 24

API is initialized after loading the page. For Flash support, the path to SWF file is passed to the init() method.

Flashphoner.init({flashMediaProviderSwfLocation: '../../../../media-provider.swf'});

2. Connection to server. line 69

Connection to server is established when Connect button is clicked.

Flashphoner.createSession(connectionOptions).on(SESSION_STATUS.ESTABLISHED, function(session){
    setStatus("#regStatus", SESSION_STATUS.ESTABLISHED);
    onConnected(session);
    if (!registerRequired) {
        disableOutgoing(false);
    }
}).on(SESSION_STATUS.REGISTERED, function(session){
    setStatus("#regStatus", SESSION_STATUS.REGISTERED);
    onConnected(session);
    if (registerRequired) {
        disableOutgoing(false);
    }
}).on(SESSION_STATUS.DISCONNECTED, function(){
    setStatus("#regStatus", SESSION_STATUS.DISCONNECTED);
    onDisconnected();
}).on(SESSION_STATUS.FAILED, function(){
    setStatus("#regStatus", SESSION_STATUS.FAILED);
    onDisconnected();
}).on(SESSION_STATUS.INCOMING_CALL, function(call){ 
    call.on(CALL_STATUS.RING, function(){
        setStatus("#callStatus", CALL_STATUS.RING);
    }).on(CALL_STATUS.ESTABLISHED, function(){
	 setStatus("#callStatus", CALL_STATUS.ESTABLISHED);
        enableMuteToggles(true);
    }).on(CALL_STATUS.FINISH, function(){
        setStatus("#callStatus", CALL_STATUS.FINISH);
        onHangupIncoming();
        currentCall = null;
    });
    onIncomingCall(call);
});

Session is created with method createSession().
Object with connection options is passed to the method

• urlServer - URL for WebSocket connection to WCS server
• sipOptions - object with parameters for SIP connection

Callback functions for the following session statuses are added to make appropriate changes in controls of the interface

• SESSION_STATUS.ESTABLISHED - connection to WCS server is successfully established
• SESSION_STATUS.REGISTERED - successful SIP registration
• SESSION_STATUS.DISCONNECTED - connection is closed
• SESSION_STATUS.FAILED - connection failure
• SESSION_STATUS.INCOMING_CALL - incoming call is received

When incoming call is received, callback functions for events CALL_STATUS.RING, CALL_STATUS.ESTABLISHED, CALL_STATUS.FINISH are added.

3. Outgoing call. line 105

New call is created with method session.createCall().
The following parameters are passed when call is created

• callee - callee SIP username
• visibleName - display name
• localVideoDisplay - <div> element, in which video from camera will be displayed
• remoteVideoDisplay - <div> element, in which video from the other party will be displayed

var outCall = session.createCall({
    callee: $("#callee").val(),
    visibleName: $("#sipLogin").val(),
        localVideoDisplay: localVideo,
	 remoteVideoDisplay: remoteVideo
}).on(CALL_STATUS.RING, function(){
    setStatus("#callStatus", CALL_STATUS.RING);
}).on(CALL_STATUS.ESTABLISHED, function(){
    setStatus("#callStatus", CALL_STATUS.ESTABLISHED);
    enableMuteToggles(true);
}).on(CALL_STATUS.FINISH, function(){
    setStatus("#callStatus", CALL_STATUS.FINISH);
    onHangupOutgoing();
    currentCall = null;
});

When call is created, callback functions for events CALL_STATUS.RING, CALL_STATUS.ESTABLISHED, CALL_STATUS.FINISH are added to make appropriate changes in controls of the interface.

Outgoing call is placed with method call(). line 121

outCall.call();

4. Answering incoming call. line 174

Incoming call is answered with method answer().
Object with answer options is passed to the method

• localVideoDisplay - <div> element, in which video from camera will be displayed
• remoteVideoDisplay - <div> element, in which video from the other party will be displayed

inCall.answer({
    localVideoDisplay: localVideo,
    remoteVideoDisplay: remoteVideo
});

5. Call hangup.

Method hangup() is used to hang up call

• hang up outgoing call: outCall.hangup(); line 126
• hang up incoming call: inCall.hangup(); line 174
• hang up current call when session is disconnected: currentCall.hangup(); line 137

6. Mute/unmute. line 274, line 281, line 288, line 295

The following methods are used to mute/unmute audio and video

• currentCall.muteAudio();
• currentCall.unmuteAudio();
• currentCall.muteVideo();
• currentCall.unmuteVideo();