startBfcpShare not working

[GoogleCodeExporter]

Hi there,

I used the new version (1.5.222) of sipml5 and noticed bfcp was added.  I tried 
to activate this in my webrtc client but no response after I call bfcp.

My javascript as below.
I am using Chrome.  The script was as below:

        tp.duo_video = function() {
            if(tp.callSession) {
                tp.callSession.startBfcpShare();
            }
        }

My html as below:
<td><input type="button" style="background-color:transparent; border: 1px solid 
#000" id="tp_btn_presentation_toggle" value="duo_video" 
onclick="tp.duo_video();" /></td>

When I click my button, there is no response from the script.  Can someone help 
to set an example of the bfcp can work?

Thanks very much in advance, Patrick

Original issue reported on code.google.com by [email protected] on 16 Mar 2015 at 4:30