speaktome-api
Version:
JavaScript modules for Mozilla's cloud speech recognition API
1,088 lines (948 loc) • 132 kB
JavaScript
(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.SpeakToMe = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(_dereq_,module,exports){
},{}],2:[function(_dereq_,module,exports){
(function (process){
// .dirname, .basename, and .extname methods are extracted from Node.js v8.11.1,
// backported and transplited with Babel, with backwards-compat fixes
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// resolves . and .. elements in a path array with directory names there
// must be no slashes, empty elements, or device names (c:\) in the array
// (so also no leading and trailing slashes - it does not distinguish
// relative and absolute paths)
function normalizeArray(parts, allowAboveRoot) {
// if the path tries to go above the root, `up` ends up > 0
var up = 0;
for (var i = parts.length - 1; i >= 0; i--) {
var last = parts[i];
if (last === '.') {
parts.splice(i, 1);
} else if (last === '..') {
parts.splice(i, 1);
up++;
} else if (up) {
parts.splice(i, 1);
up--;
}
}
// if the path is allowed to go above the root, restore leading ..s
if (allowAboveRoot) {
for (; up--; up) {
parts.unshift('..');
}
}
return parts;
}
// path.resolve([from ...], to)
// posix version
exports.resolve = function() {
var resolvedPath = '',
resolvedAbsolute = false;
for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
var path = (i >= 0) ? arguments[i] : process.cwd();
// Skip empty and invalid entries
if (typeof path !== 'string') {
throw new TypeError('Arguments to path.resolve must be strings');
} else if (!path) {
continue;
}
resolvedPath = path + '/' + resolvedPath;
resolvedAbsolute = path.charAt(0) === '/';
}
// At this point the path should be resolved to a full absolute path, but
// handle relative paths to be safe (might happen when process.cwd() fails)
// Normalize the path
resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
return !!p;
}), !resolvedAbsolute).join('/');
return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
};
// path.normalize(path)
// posix version
exports.normalize = function(path) {
var isAbsolute = exports.isAbsolute(path),
trailingSlash = substr(path, -1) === '/';
// Normalize the path
path = normalizeArray(filter(path.split('/'), function(p) {
return !!p;
}), !isAbsolute).join('/');
if (!path && !isAbsolute) {
path = '.';
}
if (path && trailingSlash) {
path += '/';
}
return (isAbsolute ? '/' : '') + path;
};
// posix version
exports.isAbsolute = function(path) {
return path.charAt(0) === '/';
};
// posix version
exports.join = function() {
var paths = Array.prototype.slice.call(arguments, 0);
return exports.normalize(filter(paths, function(p, index) {
if (typeof p !== 'string') {
throw new TypeError('Arguments to path.join must be strings');
}
return p;
}).join('/'));
};
// path.relative(from, to)
// posix version
exports.relative = function(from, to) {
from = exports.resolve(from).substr(1);
to = exports.resolve(to).substr(1);
function trim(arr) {
var start = 0;
for (; start < arr.length; start++) {
if (arr[start] !== '') break;
}
var end = arr.length - 1;
for (; end >= 0; end--) {
if (arr[end] !== '') break;
}
if (start > end) return [];
return arr.slice(start, end - start + 1);
}
var fromParts = trim(from.split('/'));
var toParts = trim(to.split('/'));
var length = Math.min(fromParts.length, toParts.length);
var samePartsLength = length;
for (var i = 0; i < length; i++) {
if (fromParts[i] !== toParts[i]) {
samePartsLength = i;
break;
}
}
var outputParts = [];
for (var i = samePartsLength; i < fromParts.length; i++) {
outputParts.push('..');
}
outputParts = outputParts.concat(toParts.slice(samePartsLength));
return outputParts.join('/');
};
exports.sep = '/';
exports.delimiter = ':';
exports.dirname = function (path) {
if (typeof path !== 'string') path = path + '';
if (path.length === 0) return '.';
var code = path.charCodeAt(0);
var hasRoot = code === 47 /*/*/;
var end = -1;
var matchedSlash = true;
for (var i = path.length - 1; i >= 1; --i) {
code = path.charCodeAt(i);
if (code === 47 /*/*/) {
if (!matchedSlash) {
end = i;
break;
}
} else {
// We saw the first non-path separator
matchedSlash = false;
}
}
if (end === -1) return hasRoot ? '/' : '.';
if (hasRoot && end === 1) {
// return '//';
// Backwards-compat fix:
return '/';
}
return path.slice(0, end);
};
function basename(path) {
if (typeof path !== 'string') path = path + '';
var start = 0;
var end = -1;
var matchedSlash = true;
var i;
for (i = path.length - 1; i >= 0; --i) {
if (path.charCodeAt(i) === 47 /*/*/) {
// If we reached a path separator that was not part of a set of path
// separators at the end of the string, stop now
if (!matchedSlash) {
start = i + 1;
break;
}
} else if (end === -1) {
// We saw the first non-path separator, mark this as the end of our
// path component
matchedSlash = false;
end = i + 1;
}
}
if (end === -1) return '';
return path.slice(start, end);
}
// Uses a mixed approach for backwards-compatibility, as ext behavior changed
// in new Node.js versions, so only basename() above is backported here
exports.basename = function (path, ext) {
var f = basename(path);
if (ext && f.substr(-1 * ext.length) === ext) {
f = f.substr(0, f.length - ext.length);
}
return f;
};
exports.extname = function (path) {
if (typeof path !== 'string') path = path + '';
var startDot = -1;
var startPart = 0;
var end = -1;
var matchedSlash = true;
// Track the state of characters (if any) we see before our first dot and
// after any path separator we find
var preDotState = 0;
for (var i = path.length - 1; i >= 0; --i) {
var code = path.charCodeAt(i);
if (code === 47 /*/*/) {
// If we reached a path separator that was not part of a set of path
// separators at the end of the string, stop now
if (!matchedSlash) {
startPart = i + 1;
break;
}
continue;
}
if (end === -1) {
// We saw the first non-path separator, mark this as the end of our
// extension
matchedSlash = false;
end = i + 1;
}
if (code === 46 /*.*/) {
// If this is our first dot, mark it as the start of our extension
if (startDot === -1)
startDot = i;
else if (preDotState !== 1)
preDotState = 1;
} else if (startDot !== -1) {
// We saw a non-dot and non-path separator before our dot, so we should
// have a good chance at having a non-empty extension
preDotState = -1;
}
}
if (startDot === -1 || end === -1 ||
// We saw a non-dot character immediately before the dot
preDotState === 0 ||
// The (right-most) trimmed path component is exactly '..'
preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
return '';
}
return path.slice(startDot, end);
};
function filter (xs, f) {
if (xs.filter) return xs.filter(f);
var res = [];
for (var i = 0; i < xs.length; i++) {
if (f(xs[i], i, xs)) res.push(xs[i]);
}
return res;
}
// String.prototype.substr - negative index don't work in IE8
var substr = 'ab'.substr(-1) === 'b'
? function (str, start, len) { return str.substr(start, len) }
: function (str, start, len) {
if (start < 0) start = str.length + start;
return str.substr(start, len);
}
;
}).call(this,_dereq_('_process'))
},{"_process":3}],3:[function(_dereq_,module,exports){
// shim for using process in browser
var process = module.exports = {};
// cached from whatever global is present so that test runners that stub it
// don't break things. But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals. It's inside a
// function because try/catches deoptimize in certain engines.
var cachedSetTimeout;
var cachedClearTimeout;
function defaultSetTimout() {
throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
throw new Error('clearTimeout has not been defined');
}
(function () {
try {
if (typeof setTimeout === 'function') {
cachedSetTimeout = setTimeout;
} else {
cachedSetTimeout = defaultSetTimout;
}
} catch (e) {
cachedSetTimeout = defaultSetTimout;
}
try {
if (typeof clearTimeout === 'function') {
cachedClearTimeout = clearTimeout;
} else {
cachedClearTimeout = defaultClearTimeout;
}
} catch (e) {
cachedClearTimeout = defaultClearTimeout;
}
} ())
function runTimeout(fun) {
if (cachedSetTimeout === setTimeout) {
//normal enviroments in sane situations
return setTimeout(fun, 0);
}
// if setTimeout wasn't available but was latter defined
if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
cachedSetTimeout = setTimeout;
return setTimeout(fun, 0);
}
try {
// when when somebody has screwed with setTimeout but no I.E. maddness
return cachedSetTimeout(fun, 0);
} catch(e){
try {
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
return cachedSetTimeout.call(null, fun, 0);
} catch(e){
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
return cachedSetTimeout.call(this, fun, 0);
}
}
}
function runClearTimeout(marker) {
if (cachedClearTimeout === clearTimeout) {
//normal enviroments in sane situations
return clearTimeout(marker);
}
// if clearTimeout wasn't available but was latter defined
if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
cachedClearTimeout = clearTimeout;
return clearTimeout(marker);
}
try {
// when when somebody has screwed with setTimeout but no I.E. maddness
return cachedClearTimeout(marker);
} catch (e){
try {
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
return cachedClearTimeout.call(null, marker);
} catch (e){
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
// Some versions of I.E. have different rules for clearTimeout vs setTimeout
return cachedClearTimeout.call(this, marker);
}
}
}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;
function cleanUpNextTick() {
if (!draining || !currentQueue) {
return;
}
draining = false;
if (currentQueue.length) {
queue = currentQueue.concat(queue);
} else {
queueIndex = -1;
}
if (queue.length) {
drainQueue();
}
}
function drainQueue() {
if (draining) {
return;
}
var timeout = runTimeout(cleanUpNextTick);
draining = true;
var len = queue.length;
while(len) {
currentQueue = queue;
queue = [];
while (++queueIndex < len) {
if (currentQueue) {
currentQueue[queueIndex].run();
}
}
queueIndex = -1;
len = queue.length;
}
currentQueue = null;
draining = false;
runClearTimeout(timeout);
}
process.nextTick = function (fun) {
var args = new Array(arguments.length - 1);
if (arguments.length > 1) {
for (var i = 1; i < arguments.length; i++) {
args[i - 1] = arguments[i];
}
}
queue.push(new Item(fun, args));
if (queue.length === 1 && !draining) {
runTimeout(drainQueue);
}
};
// v8 likes predictible objects
function Item(fun, array) {
this.fun = fun;
this.array = array;
}
Item.prototype.run = function () {
this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};
function noop() {}
process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;
process.listeners = function (name) { return [] }
process.binding = function (name) {
throw new Error('process.binding is not supported');
};
process.cwd = function () { return '/' };
process.chdir = function (dir) {
throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };
},{}],4:[function(_dereq_,module,exports){
/*
TODO:
* fix VAD re-use
states/events
* ready
* listening
* processing
* sending
* result
* error
*/
var STT_SERVER_URL = 'https://speaktome-2.services.mozilla.com/';
var RECORDING_TIMEOUT = 3000;
var RECORDING_BITS_PER_SECOND = 16000;
var RECORDING_MIME_TYPE = 'audio/ogg';
if (!MediaRecorder.isTypeSupported(RECORDING_MIME_TYPE)){
RECORDING_MIME_TYPE = 'audio/webm;codecs=opus';
}
(function initCompat() {
// Older browsers might not implement mediaDevices at all, so we set an empty object first
if (navigator.mediaDevices === undefined) {
navigator.mediaDevices = {};
}
// Some browsers partially implement mediaDevices. We can't just assign an object
// with getUserMedia as it would overwrite existing properties.
// Here, we will just add the getUserMedia property if it's missing.
if (navigator.mediaDevices.getUserMedia === undefined) {
navigator.mediaDevices.getUserMedia = function(constraints) {
// First get ahold of the legacy getUserMedia, if present
var getUserMedia = navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
// Some browsers just don't implement it - return a rejected promise with an error
// to keep a consistent interface
if (!getUserMedia) {
return Promise.reject(new Error('getUserMedia is not implemented in this browser'));
}
// Otherwise, wrap the call to the old navigator.getUserMedia with a Promise
return new Promise(function(resolve, reject) {
getUserMedia.call(navigator, constraints, resolve, reject);
});
}
}
})();
function SpeakToMe(options) {
// Default config
var config = {
vad: true,
timeout: RECORDING_TIMEOUT,
continuous: false,
serverURL: STT_SERVER_URL,
listener: null
};
// Caller options
if (options) {
if (options.vad === false) {
config.vad = false;
}
if (options.timeout) {
// TODO: validate
config.timeout = options.timeout;
}
if (options.listener) {
config.listener = options.listener;
}
}
/*
States:
* ready: recorder inactive
* listening: recorder active
* sending: sending recording
* waitingonserver: sent recording, waiting for response
* result: received result
*/
var state = 'ready';
// Lazy initialized in listen()
var VAD = null;
// Recording bits
// initialized in listen, and destroyed
// in stopListening
var audioContext,
sourceNode,
analyzerNode,
outputNode,
scriptProcessor,
mediaRecorder,
mediaStream,
vadReason;
// Start recording
function listen() {
// Callers should only listen after receiving
// the 'ready' state event, so we can ignore
// their requests if we're not ready.
if (state != 'ready') {
console.warn('Listen() called when not ready');
return;
}
// Lazy init VAD on first-use
// TODO: Fix VAD re-use. Fails for some reason on successive use.
/*
if (config.vad && !VAD) {
function onVADComplete(reason) {
console.log('onVADComplete', reason);
vadReason = reason;
stopListening();
}
VAD = SpeakToMeVAD({
listener: onVADComplete
});
}
*/
// Configure constraints
var constraints = { audio: true };
// Start listening
navigator.mediaDevices
.getUserMedia(constraints)
.then(onStream)
.catch(function(err) {
updateState({ state: 'error', error: err});
updateState({ state: 'ready'});
});
}
function onStream(stream) {
mediaStream = stream;
updateState({ state: 'listening'});
// Build the WebAudio graph we'll be using
audioContext = new AudioContext();
sourceNode = audioContext.createMediaStreamSource(stream);
analyzerNode = audioContext.createAnalyser();
outputNode = audioContext.createMediaStreamDestination();
// make sure we're doing mono everywhere
sourceNode.channelCount = 1;
analyzerNode.channelCount = 1;
outputNode.channelCount = 1;
// connect the nodes together
sourceNode.connect(analyzerNode);
analyzerNode.connect(outputNode);
if (config.vad) {
// Initialize VAD
// TODO: Re-use VAD instead of initializing on each use.
function onVADComplete(reason) {
//console.log('onVADComplete', reason);
vadReason = reason;
stopListening();
}
VAD = SpeakToMeVAD({
listener: onVADComplete
});
// Reset last VAD reason
vadReason = '';
var bufferSize = 2048;
// create a javascript node
scriptprocessor = audioContext.createScriptProcessor(
bufferSize, 1, 1);
scriptprocessor.connect(audioContext.destination);
// Send audio events to VAD, which will call onVADComplete
// when either voice input ends, none is detected, or neither (timeout).
scriptprocessor.onaudioprocess = VAD.onAudioProcessingEvent;
// connect stream to our recorder
sourceNode.connect(scriptprocessor);
}
// Set up the recorder
var options = {
audioBitsPerSecond: RECORDING_BITS_PER_SECOND,
mimeType: RECORDING_MIME_TYPE
};
// MediaRecorder initialization
mediaRecorder = new MediaRecorder(
outputNode.stream,
options
);
mediaRecorder.start();
// If VAD is disabled, stop recording on a timeout
if (!config.vad) {
setTimeout(stopListening, config.timeout);
}
mediaRecorder.onstop = function(e) {
// We stopped the recording, process the results
updateState({ state: 'processing'});
// No voice detected from VAD
if (config.vad && vadReason == 'novoice' ||
// Or nothing recorded
!chunks[0].size) {
updateState({ state: 'result', data: []});
updateState({ state: 'ready'});
}
else {
// Create blob from recording, for upload
var blob = new Blob(chunks, {
type: "audio/ogg; codecs=opus"
});
// Send to server
sendRecordingToServer(blob);
}
// Reset recording buffer
chunks = [];
// Clean up
mediaRecorder = null;
audioContext = null;
sourceNode = null;
analyzerNode = null;
outputNode = null;
stream = null;
scriptprocessor = null;
};
// Stored data from mediarecorder
var chunks = [];
mediaRecorder.ondataavailable = function(e) {
chunks.push(e.data);
};
}
function sendRecordingToServer(blob) {
updateState({ state: 'sending'});
fetch(config.serverURL, {
method: "POST",
body: blob
})
.then(function(response) {
return response.json();
})
.then(function(json) {
if (json.status === "ok") {
updateState({ state: 'result', data: json.data});
updateState({ state: 'ready'});
}
else {
throw new Error('Receive bad status:', json.status);
}
})
.catch(function(error) {
updateState({ state: 'error', error: error});
updateState({ state: 'ready'});
});
}
function stopListening() {
if (state != 'listening') {
console.warn("stopListening(): stopping but not listening?!");
return;
}
mediaStream.getAudioTracks()[0].stop();
mediaRecorder.stop();
sourceNode.disconnect(scriptprocessor);
sourceNode.disconnect(analyzerNode);
analyzerNode.disconnect(outputNode);
scriptprocessor.disconnect(audioContext.destination);
audioContext.close();
}
function updateState(msg) {
state = msg.state;
if (!config.listener) {
console.warn('SpeakToMe: You need to initialize SpeakToMe with an event listener!');
return;
}
try {
config.listener(msg);
}
catch(ex) {
console.error('SpeakToMe: Listener error', ex);
}
}
function getmediaStream() {
return mediaStream;
}
// Public API
return {
listen: listen,
stop: stopListening,
setListener: function(l) {
config.listener = l;
},
getmediaStream : getmediaStream
};
}
if (typeof(module) != "undefined") {
module.exports = SpeakToMe;
}
},{}],5:[function(_dereq_,module,exports){
// Webrtc_Vad integration
function SpeakToMeVAD(options) {
var config = {
listener: function() {
console.error('SpeakToMeVAD: No listener configured!');
},
maxSilence: 500
};
if (options) {
if (options['listener'] != undefined) {
config.listener = options.listener;
}
if (options['maxSilence'] != undefined) {
console.log('MAXSILDNECE', options.maxSilence)
config.maxSilence = options.maxSilence;
}
}
var webrtc_main = Module.cwrap("main");
webrtc_main();
var webrtc_setmode = Module.cwrap("setmode", "number", ["number"]);
// set_mode defines the aggressiveness degree of the voice activity detection algorithm
// for more info see: https://github.com/mozilla/gecko/blob/central/media/webrtc/trunk/webrtc/common_audio/vad/vad_core.h#L68
webrtc_setmode(3);
var webrtc_process_data = Module.cwrap("process_data", "number", [
"number",
"number",
"number",
"number",
"number",
"number"
]);
// frame length that should be passed to the vad engine. Depends on audio sample rate
// https://github.com/mozilla/gecko/blob/central/media/webrtc/trunk/webrtc/common_audio/vad/vad_core.h#L106
var sizeBufferVad = 480;
//
var buffer_vad = new Int16Array(sizeBufferVad);
//
var leftovers = 0;
//
var finishedVoice = false;
//
var samplesvoice = 0;
//
var touchedvoice = false;
//
var touchedsilence = false;
//
var dtantes = Date.now();
//
var dtantesmili = Date.now();
//
var done = false;
// minimum of voice (in milliseconds) that should be captured to be considered voice
var minvoice = 250;
// max amount of silence (in milliseconds) that should be captured to be considered end-of-speech
var maxsilence = config.maxSilence;
// max amount of capturing time (in seconds)
var maxtime = 6;
function reset() {
buffer_vad = new Int16Array(sizeBufferVad);
leftovers = 0;
samplesvoice = 0;
samplessilence = 0;
touchedvoice = false;
touchedsilence = false;
dtantes = Date.now();
dtantesmili = Date.now();
done = false;
}
// function that returns if the specified buffer has silence of speech
function isSilence(buffer_pcm) {
// Get data byte size, allocate memory on Emscripten heap, and get pointer
var nDataBytes = buffer_pcm.length * buffer_pcm.BYTES_PER_ELEMENT;
var dataPtr = Module._malloc(nDataBytes);
// Copy data to Emscripten heap (directly accessed from Module.HEAPU8)
var dataHeap = new Uint8Array(
Module.HEAPU8.buffer,
dataPtr,
nDataBytes
);
dataHeap.set(new Uint8Array(buffer_pcm.buffer));
// Call function and get result
var result = webrtc_process_data(
dataHeap.byteOffset,
buffer_pcm.length,
48000,
buffer_pcm[0],
buffer_pcm[100],
buffer_pcm[2000]
);
// Free memory
Module._free(dataHeap.byteOffset);
return result;
}
function floatTo16BitPCM(output, input) {
for (var i = 0; i < input.length; i++) {
var s = Math.max(-1, Math.min(1, input[i]));
output[i] = s < 0 ? s * 0x8000 : s * 0x7fff;
}
}
function onAudioProcessingEvent(e) {
var buffer_pcm = new Int16Array(
e.inputBuffer.getChannelData(0).length
);
floatTo16BitPCM(
buffer_pcm,
e.inputBuffer.getChannelData(0)
);
// algorithm used to determine if the user stopped speaking or not
for (
var i = 0;
i < Math.ceil(buffer_pcm.length / sizeBufferVad) && !done;
i++
) {
var start = i * sizeBufferVad;
var end = start + sizeBufferVad;
if (start + sizeBufferVad > buffer_pcm.length) {
// store to the next buffer
buffer_vad.set(buffer_pcm.slice(start));
leftovers = buffer_pcm.length - start;
} else {
if (leftovers > 0) {
// we have this.leftovers from previous array
end = end - this.leftovers;
buffer_vad.set(
buffer_pcm.slice(start, end),
leftovers
);
leftovers = 0;
} else {
// send to the vad
buffer_vad.set(buffer_pcm.slice(start, end));
}
var vad = isSilence(buffer_vad);
// TODO: this doesn't seem necessary, we do it in reset()
buffer_vad = new Int16Array(sizeBufferVad);
var dtdepois = Date.now();
if (vad === 0) {
if (touchedvoice) {
samplessilence += dtdepois - dtantesmili;
if (samplessilence > maxsilence) {
touchedsilence = true;
}
}
} else {
samplesvoice += dtdepois - dtantesmili;
if (samplesvoice > minvoice) {
touchedvoice = true;
}
}
dtantesmili = dtdepois;
if (touchedvoice && touchedsilence) {
done = true;
onComplete("finishedvoice");
}
// TODO: should be an else here, yah?
else if ((dtdepois - dtantes) / 1000 > maxtime) {
done = true;
if (touchedvoice) {
onComplete("timeout");
} else {
onComplete("novoice");
}
}
}
}
}
function onComplete(why) {
try {
config.listener(why);
} catch(ex) {
console.log('SpeakToMe_VAD: onCompleteCallback exception', ex);
}
// Auto-reset for next input
reset();
}
// TODO: something not initializing right - this shouldn't be necessary
reset();
// Public
return {
reset: reset,
onAudioProcessingEvent: onAudioProcessingEvent
};
}
if (typeof(module) != "undefined") {
module.exports = SpeakToMe;
}
// TODO modularize and protect the emscripten stuff
// because it seems to depend on window globals being exposed.
//
// Also, maybe just put this and webrtc_vad.js all in one file...
// Creation of the configuration object
// that will be pick by emscripten module
var Module = {
preRun: [],
postRun: [],
print: (function() {
return function(text) {
console.log("[webrtc_vad.js print]", text);
};
})(),
printErr: function(text) {
console.error("[webrtc_vad.js error]", text);
},
canvas: (function() {})(),
setStatus: function(text) {
console.log("[webrtc_vad.js status] ", text);
},
totalDependencies: 0,
monitorRunDependencies: function(left) {
this.totalDependencies = Math.max(this.totalDependencies, left);
Module.setStatus(
left
? "Preparing... (" +
(this.totalDependencies - left) +
"/" +
this.totalDependencies +
")"
: "All downloads complete."
);
}
};
Module.setStatus("Loading webrtc_vad...");
window.onerror = function(event) {
// TODO: do not warn on ok events like simulating an infinite loop or exitStatus
Module.setStatus("Exception thrown, see JavaScript console");
Module.setStatus = function(text) {
if (text) {
Module.printErr("[post-exception status] " + text);
}
};
};
Module.noInitialRun = true;
Module["onRuntimeInitialized"] = function() {
Module.setStatus("Webrtc_vad and SpeakToMeVad loaded");
};
},{}],6:[function(_dereq_,module,exports){
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It must be one of: WEB|WORKER|NODE|SHELL.")}}else{ENVIRONMENT_IS_WEB=typeof window==="object";ENVIRONMENT_IS_WORKER=typeof importScripts==="function";ENVIRONMENT_IS_NODE=typeof process==="object"&&typeof _dereq_==="function"&&!ENVIRONMENT_IS_WEB&&!ENVIRONMENT_IS_WORKER;ENVIRONMENT_IS_SHELL=!ENVIRONMENT_IS_WEB&&!ENVIRONMENT_IS_NODE&&!ENVIRONMENT_IS_WORKER}if(ENVIRONMENT_IS_NODE){if(!Module["print"])Module["print"]=console.log;if(!Module["printErr"])Module["printErr"]=console.warn;var nodeFS;var nodePath;Module["read"]=function read(filename,binary){if(!nodeFS)nodeFS=_dereq_("fs");if(!nodePath)nodePath=_dereq_("path");filename=nodePath["normalize"](filename);var ret=nodeFS["readFileSync"](filename);return binary?ret:ret.toString()};Module["readBinary"]=function readBinary(filename){var ret=Module["read"](filename,true);if(!ret.buffer){ret=new Uint8Array(ret)}assert(ret.buffer);return ret};Module["load"]=function load(f){globalEval(read(f))};if(!Module["thisProgram"]){if(process["argv"].length>1){Module["thisProgram"]=process["argv"][1].replace(/\\/g,"/")}else{Module["thisProgram"]="unknown-program"}}Module["arguments"]=process["argv"].slice(2);if(typeof module!=="undefined"){module["exports"]=Module}process["on"]("uncaughtException",(function(ex){if(!(ex instanceof ExitStatus)){throw ex}}));Module["inspect"]=(function(){return"[Emscripten Module object]"})}else if(ENVIRONMENT_IS_SHELL){if(!Module["print"])Module["print"]=print;if(typeof printErr!="undefined")Module["printErr"]=printErr;if(typeof read!="undefined"){Module["read"]=read}else{Module["read"]=function read(){throw"no read() available"}}Module["readBinary"]=function readBinary(f){if(typeof readbuffer==="function"){return new Uint8Array(readbuffer(f))}var data=read(f,"binary");assert(typeof data==="object");return data};if(typeof scriptArgs!="undefined"){Module["arguments"]=scriptArgs}else if(typeof arguments!="undefined"){Module["arguments"]=arguments}if(typeof quit==="function"){Module["quit"]=(function(status,toThrow){quit(status)})}}else if(ENVIRONMENT_IS_WEB||ENVIRONMENT_IS_WORKER){Module["read"]=function read(url){var xhr=new XMLHttpRequest;xhr.open("GET",url,false);xhr.send(null);return xhr.responseText};if(ENVIRONMENT_IS_WORKER){Module["readBinary"]=function read(url){var xhr=new XMLHttpRequest;xhr.open("GET",url,false);xhr.responseType="arraybuffer";xhr.send(null);return xhr.response}}Module["readAsync"]=function readAsync(url,onload,onerror){var xhr=new XMLHttpRequest;xhr.open("GET",url,true);xhr.responseType="arraybuffer";xhr.onload=function xhr_onload(){if(xhr.status==200||xhr.status==0&&xhr.response){onload(xhr.response)}else{onerror()}};xhr.onerror=onerror;xhr.send(null)};if(typeof arguments!="undefined"){Module["arguments"]=arguments}if(typeof console!=="undefined"){if(!Module["print"])Module["print"]=function print(x){console.log(x)};if(!Module["printErr"])Module["printErr"]=function printErr(x){console.warn(x)}}else{var TRY_USE_DUMP=false;if(!Module["print"])Module["print"]=TRY_USE_DUMP&&typeof dump!=="undefined"?(function(x){dump(x)}):(function(x){})}if(ENVIRONMENT_IS_WORKER){Module["load"]=importScripts}if(typeof Module["setWindowTitle"]==="undefined"){Module["setWindowTitle"]=(function(title){document.title=title})}}else{throw"Unknown runtime environment. Where are we?"}function globalEval(x){eval.call(null,x)}if(!Module["load"]&&Module["read"]){Module["load"]=function load(f){globalEval(Module["read"](f))}}if(!Module["print"]){Module["print"]=(function(){})}if(!Module["printErr"]){Module["printErr"]=Module["print"]}if(!Module["arguments"]){Module["arguments"]=[]}if(!Module["thisProgram"]){Module["thisProgram"]="./this.program"}if(!Module["quit"]){Module["quit"]=(function(status,toThrow){throw toThrow})}Module.print=Module["print"];Module.printErr=Module["printErr"];Module["preRun"]=[];Module["postRun"]=[];for(var key in moduleOverrides){if(moduleOverrides.hasOwnProperty(key)){Module[key]=moduleOverrides[key]}}moduleOverrides=undefined;var Runtime={setTempRet0:(function(value){tempRet0=value;return value}),getTempRet0:(function(){return tempRet0}),stackSave:(function(){return STACKTOP}),stackRestore:(function(stackTop){STACKTOP=stackTop}),getNativeTypeSize:(function(type){switch(type){case"i1":case"i8":return 1;case"i16":return 2;case"i32":return 4;case"i64":return 8;case"float":return 4;case"double":return 8;default:{if(type[type.length-1]==="*"){return Runtime.QUANTUM_SIZE}else if(type[0]==="i"){var bits=parseInt(type.substr(1));assert(bits%8===0);return bits/8}else{return 0}}}}),getNativeFieldSize:(function(type){return Math.max(Runtime.getNativeTypeSize(type),Runtime.QUANTUM_SIZE)}),STACK_ALIGN:16,prepVararg:(function(ptr,type){if(type==="double"||type==="i64"){if(ptr&7){assert((ptr&7)===4);ptr+=4}}else{assert((ptr&3)===0)}return ptr}),getAlignSize:(function(type,size,vararg){if(!vararg&&(type=="i64"||type=="double"))return 8;if(!type)return Math.min(size,8);return Math.min(size||(type?Runtime.getNativeFieldSize(type):0),Runtime.QUANTUM_SIZE)}),dynCall:(function(sig,ptr,args){if(args&&args.length){return Module["dynCall_"+sig].apply(null,[ptr].concat(args))}else{return Module["dynCall_"+sig].call(null,ptr)}}),functionPointers:[],addFunction:(function(func){for(var i=0;i<Runtime.functionPointers.length;i++){if(!Runtime.functionPointers[i]){Runtime.functionPointers[i]=func;return 2*(1+i)}}throw"Finished up all reserved function pointers. Use a higher value for RESERVED_FUNCTION_POINTERS."}),removeFunction:(function(index){Runtime.functionPointers[(index-2)/2]=null}),warnOnce:(function(text){if(!Runtime.warnOnce.shown)Runtime.warnOnce.shown={};if(!Runtime.warnOnce.shown[text]){Runtime.warnOnce.shown[text]=1;Module.printErr(text)}}),funcWrappers:{},getFuncWrapper:(function(func,sig){assert(sig);if(!Runtime.funcWrappers[sig]){Runtime.funcWrappers[sig]={}}var sigCache=Runtime.funcWrappers[sig];if(!sigCache[func]){if(sig.length===1){sigCache[func]=function dynCall_wrapper(){return Runtime.dynCall(sig,func)}}else if(sig.length===2){sigCache[func]=function dynCall_wrapper(arg){return Runtime.dynCall(sig,func,[arg])}}else{sigCache[func]=function dynCall_wrapper(){return Runtime.dynCall(sig,func,Array.prototype.slice.call(arguments))}}}return sigCache[func]}),getCompilerSetting:(function(name){throw"You must build with -s RETAIN_COMPILER_SETTINGS=1 for Runtime.getCompilerSetting or emscripten_get_compiler_setting to work"}),stackAlloc:(function(size){var ret=STACKTOP;STACKTOP=STACKTOP+size|0;STACKTOP=STACKTOP+15&-16;return ret}),staticAlloc:(function(size){var ret=STATICTOP;STATICTOP=STATICTOP+size|0;STATICTOP=STATICTOP+15&-16;return ret}),dynamicAlloc:(function(size){var ret=HEAP32[DYNAMICTOP_PTR>>2];var end=(ret+size+15|0)&-16;HEAP32[DYNAMICTOP_PTR>>2]=end;if(end>=TOTAL_MEMORY){var success=enlargeMemory();if(!success){HEAP32[DYNAMICTOP_PTR>>2]=ret;return 0}}return ret}),alignMemory:(function(size,quantum){var ret=size=Math.ceil(size/(quantum?quantum:16))*(quantum?quantum:16);return ret}),makeBigInt:(function(low,high,unsigned){var ret=unsigned?+(low>>>0)+ +(high>>>0)*+4294967296:+(low>>>0)+ +(high|0)*+4294967296;return ret}),GLOBAL_BASE:8,QUANTUM_SIZE:4,__dummy__:0};Module["Runtime"]=Runtime;var ABORT=0;var EXITSTATUS=0;function assert(condition,text){if(!condition){abort("Assertion failed: "+text)}}function getCFunc(ident){var func=Module["_"+ident];if(!func){try{func=eval("_"+ident)}catch(e){}}assert(func,"Cannot call unknown function "+ident+" (perhaps LLVM optimizations or closure removed it?)");return func}var cwrap,ccall;((function(){var JSfuncs={"stackSave":(function(){Runtime.stackSave()}),"stackRestore":(function(){Runtime.stackRestore()}),"arrayToC":(function(arr){var ret=Runtime.stackAlloc(arr.length);writeArrayToMemory(arr,ret);return ret}),"stringToC":(function(str){var ret=0;if(str!==null&&str!==undefined&&str!==0){var len=(str.length<<2)+1;ret=Runtime.stackAlloc(len);stringToUTF8(str,ret,len)}return ret})};var toC={"string":JSfuncs["stringToC"],"array":JSfuncs["arrayToC"]};ccall=function ccallFunc(ident,returnType,argTypes,args,opts){var func=getCFunc(ident);var cArgs=[];var stack=0;if(args){for(var i=0;i<args.length;i++){var converter=toC[argTypes[i]];if(converter){if(stack===0)stack=Runtime.stackSave();cArgs[i]=converter(args[i])}else{cArgs[i]=args[i]}}}var ret=func.apply(null,cArgs);if(returnType==="string")ret=Pointer_stringify(ret);if(stack!==0){if(opts&&opts.async){EmterpreterAsync.asyncFinalizers.push((function(){Runtime.stackRestore(stack)}));return}Runtime.stackRestore(stack)}return ret};var sourceRegex=/^function\s*[a-zA-Z$_0-9]*\s*\(([^)]*)\)\s*{\s*([^*]*?)[\s;]*(?:return\s*(.*?)[;\s]*)?}$/;function parseJSFunc(jsfunc){var parsed=jsfunc.toString().match(sourceRegex).slice(1);return{arguments:parsed[0],body:parsed[1],returnValue:parsed[2]}}var JSsource=null;function ensureJSsource(){if(!JSsource){JSsource={};for(var fun in JSfuncs){if(JSfuncs.hasOwnProperty(fun)){JSsource[fun]=parseJSFunc(JSfuncs[fun])}}}}cwrap=function cwrap(ident,returnType,argTypes){argTypes=argTypes||[];var cfunc=getCFunc(ident);var numericArgs=argTypes.every((function(type){return type==="number"}));var numericRet=returnType!=="string";if(numericRet&&numericArgs){return cfunc}var argNames=argTypes.map((function(x,i){return"$"+i}));var 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if(u<=67108863){if(outIdx+4>=endIdx)break;outU8Array[outIdx++]=248|u>>24;outU8Array[outIdx++]=128|u>>18&63;outU8Array[outIdx++]=128|u>>12&63;outU8Array[outIdx++]=128|u>>6&63;outU8Array[outIdx++]=128|u&63}else{if(outIdx+5>=endIdx)break;outU8Array[outIdx++]=252|u>>30;outU8Array[outIdx++]=128|u>>24&63;outU8Array[outIdx++]=128|u>>18&63;outU8Array[outIdx++]=128|u>>12&63;outU8Array[outIdx++]=128|u>>6&63;outU8Array[outIdx++]=128|u&63}}outU8Array[outIdx]=0;return outIdx-startIdx}Module["stringToUTF8Array"]=stringToUTF8Array;function stringToUTF8(str,outPtr,maxBytesToWrite){return stringToUTF8Array(str,HEAPU8,outPtr,maxBytesToWrite)}Module["stringToUTF8"]=stringToUTF8;function lengthBytesUTF8(str){var len=0;for(var i=0;i<str.length;++i){var u=str.charCodeAt(i);if(u>=55296&&u<=57343)u=65536+((u&1023)<<10)|str.charCodeAt(++i)&1023;if(u<=127){++len}else if(u<=2047){len+=2}else if(u<=65535){len+=3}else if(u<=2097151){len+=4}else if(u<=67108863){len+=5}else{len+=6}}return len}Module["lengthBytesUTF8"]=lengthBytesUTF8;var UTF16Decoder=typeof TextDecoder!=="undefined"?new TextDecoder("utf-16le"):undefined;function demangle(func){var __cxa_demangle_func=Module["___cxa_demangle"]||Module["__cxa_demangle"];if(__cxa_demangle_func){try{var s=func.substr(1);var len=lengthBytesUTF8(s)+1;var buf=_malloc(len);stringToUTF8(s,buf,len);var status=_malloc(4);var ret=__cxa_demangle_func(buf,0,0,status);if(getValue(status,"i32")===0&&ret){return Pointer_stringify(ret)}}catch(e){}finally{if(buf)_free(buf);if(status)_free(status);if(ret)_free(ret)}return func}Runtime.warnOnce("warning: build with -s DEMANGLE_SUPPORT=1 to link in libcxxabi demangling");return func}function demangleAll(text){var regex=/__Z[\w\d_]+/g;return text.replace(regex,(function(x){var y=demangle(x);return x===y?x:x+" ["+y+"]"}))}function jsStackTrace(){var err=new Error;if(!err.stack){try{throw new Error(0)}catch(e){err=e}if(!err.stack){return"(no stack trace available)"}}return err.stack.toString()}function stackTrace(){var js=jsStackTrace();if(Module["extraStackTrace"])js+="\n"+Module["extraStackTrace"]();return demangleAll(js)}Module["stackTrace"]=stackTrace;var HEAP;var buffer;var HEAP8,HEAPU8,HEAP16,HEAPU16,HEAP32,HEAPU32,HEAPF32,HEAPF64;function updateGlobalBufferViews(){Module["HEAP8"]=HEAP8=new Int8Array(buffer);Module["HEAP16"]=HEAP16=new Int16Array(buffer);Module["HEAP32"]=HEAP32=new Int32Array(buffer);Module["HEAPU8"]=HEAPU8=new Uint8Array(buffer);Module["HEAPU16"]=HEAPU16=new Uint16Array(buffer);Module["HEAPU32"]=HEAPU32=new Uint32Array(buffer);Module["HEAPF32"]=HEAPF32=new Float32Array(buffer);Module["HEAPF64"]=HEAPF64=new Float64Array(buffer)}var STATIC_BASE,STATICTOP,staticSealed;var STACK_BASE,STACKTOP,STACK_MAX;var DYNAMIC_BASE,DYNAMICTOP_PTR;STATIC_BASE=STATICTOP=STACK_BASE=STACKTOP=STACK_MAX=DYNAMIC_BASE=DYNAMICTOP_PTR=0;staticSealed=false;function abortOnCannotGrowMemory(){abort("Cannot enlarge memory arrays. Either (1) compile with -s TOTAL_MEMORY=X with X higher than the current value "+TOTAL_MEMORY+", (2) compile with -s ALLOW_MEMORY_GROWTH=1 which adjusts the size at runtime but prevents some optimizations, (3) set Module.TOTAL_MEMORY to a higher value before the program runs, or if you want malloc to return NULL (0) instead of this abort, compile wit