Page History: StateMachine 1.0 : Home
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Page Revision: 2010/02/05 15:50
Company Webcast's StateMachine is a Javascript library that provides access to meta data, binaries and streams directly from web browsers. It exposes an event based model to communicate "state" at any point in time during a webcast, whether that webcast is live or on-demand.
StateMachine contains lots of usefull functionality, but here are the basic functions that will get you started:
- Cwc.PlayerService.WebcastSearch()
- Cwc.PlayerService.WebcastGet()
- Cwc.CreateStateMachine()
That sounds more complicated than it really is... let's look at some sample code.
< script src="http://services.companywebcast.com/StateMachine/0.9/js/Cwc.StateMachine.js" type="text/javascript">
< script src="http://services.companywebcast.com/StateMachine/0.9/js/Cwc.StateMachine.MediaRenderer.js" type="text/javascript">
< script type="text/javascript">
window.onload = function() {
Cwc.CreateStateMachine(FORMATTER ERROR (":" and "&" not supported in Page Names),
function(StateMachine, e) {
if (e.Success) {
//We've successfully authorized for "apeldoorn/20090702_4/nl",
//retrieved its metadata and used it to instantiate a StateMachine.
//Subscribe to the event that is fired when the current speaker in this webcast changes
StateMachine.State.CurrentSpeakerChangedEvent.Subscribe(function() {
var CurrentSpeaker = StateMachine.State.getCurrentSpeaker();
if (CurrentSpeaker.LastName)
alert(CurrentSpeaker.LastName);
});
//Add the MediaRenderer of this StateMachine to the page.
document.getElementById("VideoContainer").appendChild(StateMachine.MediaRenderer);
}
});
}
The example above displays the video stream for the webcast with Code "apeldoorn/20090702_4/nl", and fires an alert containing the speaker's last name, every time the current speaker changes.