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dtmf.js
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(function(root) {
var tones = {};
function loadHangoutTones() {
var tonesUrls = {
'0': 'http://s3.amazonaws.com/trx.public/dtmf/0.wav',
'1': 'http://s3.amazonaws.com/trx.public/dtmf/1.wav',
'2': 'http://s3.amazonaws.com/trx.public/dtmf/2.wav',
'3': 'http://s3.amazonaws.com/trx.public/dtmf/3.wav',
'4': 'http://s3.amazonaws.com/trx.public/dtmf/4.wav',
'5': 'http://s3.amazonaws.com/trx.public/dtmf/5.wav',
'6': 'http://s3.amazonaws.com/trx.public/dtmf/6.wav',
'7': 'http://s3.amazonaws.com/trx.public/dtmf/7.wav',
'8': 'http://s3.amazonaws.com/trx.public/dtmf/8.wav',
'9': 'http://s3.amazonaws.com/trx.public/dtmf/9.wav',
's': 'http://s3.amazonaws.com/trx.public/dtmf/s.wav',
'p': 'http://s3.amazonaws.com/trx.public/dtmf/p.wav'
};
console.log('loading tones');
console.log(tonesUrls);
$.each(tonesUrls, function(tone, uri) {
//console.log(arguments);
tones[tone] = gapi.hangout.av.effects.createAudioResource(uri).createSound({
localOnly: false
});
});
}
function loadWebAudioTones() {
var context = new webkitAudioContext();
function ToneGenerator(hz) {
var me = this;
this.context = context;
this.node = this.context.createJavaScriptNode(2048, 1, 1);
this.hz = hz;
this.sine = 0;
this.node.onaudioprocess = function(event) {
var audioBuffer = event.outputBuffer,
data = audioBuffer.getChannelData(0),
// data length will be same as node buffer
len = data.length,
idx = 0,
sampleFreq;
// debug vals
// console.log( data, data.length, p );
sampleFreq = 2 * Math.PI * me.hz / audioBuffer.sampleRate;
for (; idx < len; idx++) {
// Float32Array values with sine-tone value
data[idx] = Math.sin(sampleFreq * me.sine++);
}
};
}
ToneGenerator.prototype = {
play: function() {
console.log('Playing');
console.log(this.hz);
this.node.connect(this.context.destination);
},
pause: function() {
this.node.disconnect();
}
};
var horizontalDTMFTones = [1209, 1336, 1477];
var verticalDTMFTones = [697, 770, 852, 941];
var ten = 'p', eleven = '0', tweleve = 's';
var count = 1;
verticalDTMFTones.forEach(function(Vhz, vidx) {
horizontalDTMFTones.forEach(function(Hhz, hidx) {
var sound = (function() {
var vGen = new ToneGenerator(Vhz);
var hGen = new ToneGenerator(Hhz);
return {
isPlaying: false,
stop: function() {
vGen.pause();
hGen.pause();
this.isPlaying = false;
},
play: function() {
vGen.play();
hGen.play();
this.isPlaying = true;
}
};
}());
if(count === 10) {
tones[ten] = sound;
} else if (count === 11) {
tones[eleven] = sound;
} else if (count === 12) {
tones[tweleve] = sound;
} else {
tones[count+''] = sound;
}
count++;
});
});
}
function dialNumber(number, cb) {
cb = cb || function() {};
if(number === '*') {
number = 's';
} else if(number === '#') {
number = 'p';
}
console.log('playing tone');
var tone = tones[number+''] || {play:function(){}, stop: function(){}};
tone.play({
localOnly: false,
loop:false
});
setTimeout(function() {
tone.stop();
cb();
}, 750);
}
function dialNumbers(numbers, cb) {
var stack = numbers.split('').reverse();
var number = null;
isDialing = true;
function nextNumber() {
var number = stack.pop();
if(number && isDialing) {
dialNumber(number, nextNumber);
} else {
isDialing = false;
cb();
}
}
dialNumber(stack.pop(), nextNumber);
}
function renderHistory(history) {
var his = $('ul');
his.empty();
history.forEach(function(num) {
var $ele = $('<li>').text(num);
his.append($ele);
});
}
function getNumberHistory() {
var n = localStorage.getItem('dtmfNumbers');
if(n) {
return JSON.parse(n);
} else {
return [];
}
}
function pushNumberHistory(numbers) {
var history = localStorage.getItem('dtmfNumbers');
var out = [];
if(history) {
history = JSON.parse(history);
} else {
history = [];
}
history.forEach(function(num) {
if(num !== numbers) {
out.push(num);
}
});
out.unshift(numbers);
if(out.length > 10) {
out.pop();
}
localStorage.setItem('dtmfNumbers', JSON.stringify(out));
return out;
}
function makeCall() {
var numbers = document.getElementById('number').value;
var form = document.getElementById('numberForm');
if(numbers) {
numbers = numbers.trim();
dialNumbers(numbers, function() {
console.log('done');
});
renderHistory(pushNumberHistory(numbers));
}
}
function startApp() {
$('form').on('submit', function(e) {
console.log('formSubmitted');
makeCall();
e.preventDefault();
});
$('.button').on('click', function() {
var $ele = $(this).find('.number');
if($ele.length) {
dialNumber($ele.text());
}
});
$('ul').delegate('li', 'click', function() {
var number = $(this).text();
$('#number').val(number);
});
renderHistory(getNumberHistory());
}
if('gapi' in root && 'util' in gapi) {
gadgets.util.registerOnLoadHandler(function() {
gapi.hangout.onApiReady.add(function() {
console.log('starting app');
loadHangoutTones();
startApp();
});
});
} else {
$(function() {
loadWebAudioTones();
startApp();
});
}
}(window));