1053193 - Improve performance of system accessibility sounds where possible.

Status: RESOLVED FIXED

(Firefox OS Graveyard :: Gaia::System, defect)

Description

[Yura Zenevich [:yzen] (please use "needinfo")]

We need to make sure that the sounds have no quiet intervals in the beginning. In some cases we can shave >10ms off.

Comment 1

[Yura Zenevich [:yzen] (please use "needinfo")]

Also need to explore web audio for playing the sounds.

Comment 2

[Paul Adenot (:padenot)]

(NI myself so I remember about this bug).

Comment 3

[Paul Adenot (:padenot)]

When 848954 lands, you will be able to use Web Audio API for this, using decodeAudioData, and AudioBufferSourceNode.

In the meantime, you can do the following:

>  var snds = {"sound0.ogg": null, "sound1.ogg":null, ...};
>  // preload the sounds
>  for (var url in snds) {
>    snds[url] = new Audio(url);
>    snds[url].load();
>  }
>  // clone the node and play it. this is fast-pathed
>  function play(url) {
>    snds[url].cloneNode(false).play();
>  }

Comment 4

[Yura Zenevich [:yzen] (please use "needinfo")]

Attachment: Github pull request.

Making sure that the sound affect happens at the same time as the vibration.

Comment 5

[(inactive after 6/18) Alive Kuo [:alive]]

Comment on attachment 8475382 [details] [review]
Github pull request.

Never know this trick :/

Comment 6

[Yura Zenevich [:yzen] (please use "needinfo")]

https://github.com/mozilla-b2g/gaia/commit/06e4db555dcb6fd6439b67963286d930a7be6233