Synchronise controller and service

[Yehonathan Sharvit]

I have a service that is connected to the microphone (navigator.webkitGetUserMedia) and calculates the microphone volume ~ every 20 msec.

I would like to access the calculated volume from two controllers.

The only solutions I found are:

1. to use $interval from inside the controller. But it takes a lot of CPU resources.

2. to fire an event from the service and listen to the event from the two controllers.

Any other suggestions?

[Tony pee]

as long as the interval which accesses webkitGetUserMedia calls $rootScope.$apply() angular refresh watches when the service calculates the volume. You can then just reference the calculated value directly from the controllers, and when it changes, they will be updated, due to angulars databinding. 

no?

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Tony Polinelli

[Tony pee]

oh, but if you want to call code in the controller, not just reference the value in the template (partial). then you will want to use a $watch in the controller code

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Tony Polinelli

[Yehonathan Sharvit]

Thanks Tony.

I have implemented the $rootScope.$apply inside the service.

Then, I have figured out that my CPU consumption was due to the fact that $interval calls $root.$digest. So I have modified my code so that it calls $scope.$digest which is much less CPU expensive.

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