[rtcweb] determining mic/webcam availability on page load

[Daniel Pocock <[e-mail]>]

Hi,

I'm not sure if this has been discussed before, but I think it would be
very useful for some applications to determine what hardware is
available very early, well before trying to do things like SIP
registration or making a call.

However, if I use the code below, the result is that the user is
prompted twice for permissions, once during the initial hardware
detection and later when they try to make or receive a call.

Regards,

Daniel



navigator.webkitGetUserMedia(

 {audio: true, video: true},

  function (stream) {
          var has_audio = false;
          var has_video = false;
	  if(stream.getAudioTracks().length > 0)
		  has_audio = true;
	  if(stream.getVideoTracks().length > 0)
		  has_video = true;
	  console.log("closing unused stream");
	  stream.stop();
	  delete stream;
          checksDone(has_audio, has_video);
  },

  function(err) {
	  console.log(err.name + ": " + err.message);
          checksDone(false, false);
  }

);