rtcmulticonnection-v3
Version:
RTCMultiConnection is a WebRTC JavaScript wrapper library runs top over RTCPeerConnection API to support all possible peer-to-peer features.
1,164 lines (981 loc) • 37.3 kB
JavaScript
// Muaz Khan - www.MuazKhan.com
// MIT License - www.WebRTC-Experiment.com/licence
// Documentation - github.com/muaz-khan/FileBufferReader
function FileBufferReader() {
var fbr = this;
var fbrHelper = new FileBufferReaderHelper();
fbr.chunks = {};
fbr.users = {};
fbr.readAsArrayBuffer = function(file, earlyCallback, extra) {
if (!file.slice) {
console.warn('Not a real File object.', file);
return;
}
extra = extra || {
userid: 0
};
if (file.extra) {
if (typeof file.extra === 'string') {
extra.extra = file.extra;
} else {
for (var e in file.extra) {
extra[e] = file.extra[e];
}
}
}
extra.fileName = file.name;
if (file.uuid) {
extra.fileUniqueId = file.uuid;
}
var options = {
uuid: file.uuid || 0,
file: file,
earlyCallback: earlyCallback,
extra: extra,
chunkSize: extra.chunkSize
};
fbrHelper.readAsArrayBuffer(fbr, options);
};
fbr.getNextChunk = function(fileUUID, callback, userid) {
var allFileChunks = fbr.chunks[fileUUID];
if (!allFileChunks) {
return;
}
var currentPosition;
if (typeof userid !== 'undefined') {
if (!fbr.users[userid + '']) {
fbr.users[userid + ''] = {
fileUUID: fileUUID,
userid: userid,
currentPosition: -1
};
}
fbr.users[userid + ''].currentPosition++;
currentPosition = fbr.users[userid + ''].currentPosition;
} else {
fbr.chunks[fileUUID].currentPosition++;
currentPosition = fbr.chunks[fileUUID].currentPosition;
}
var nextChunk = allFileChunks[currentPosition];
if (!nextChunk) return;
nextChunk = fbrClone(nextChunk);
if (typeof userid !== 'undefined') {
nextChunk.remoteUserId = userid + '';
}
if (!!nextChunk.start) {
fbr.onBegin(nextChunk);
}
if (!!nextChunk.end) {
fbr.onEnd(nextChunk);
}
fbr.onProgress(nextChunk);
fbr.convertToArrayBuffer(nextChunk, function(buffer) {
if (nextChunk.currentPosition == nextChunk.maxChunks) {
callback(buffer, true);
return;
}
callback(buffer, false);
});
};
var fbReceiver = new FileBufferReceiver(fbr);
fbr.addChunk = function(chunk, callback) {
if (!chunk) {
console.error('Chunk is missing.');
return;
}
fbReceiver.receive(chunk, function(uuid) {
fbr.convertToArrayBuffer({
readyForNextChunk: true,
uuid: uuid
}, callback);
});
};
fbr.onBegin = function() {};
fbr.onEnd = function() {};
fbr.onProgress = function() {};
fbr.convertToObject = FileConverter.ConvertToObject;
fbr.convertToArrayBuffer = FileConverter.ConvertToArrayBuffer
// for backward compatibility----it is redundant.
fbr.setMultipleUsers = function() {};
// extends 'from' object with members from 'to'. If 'to' is null, a deep clone of 'from' is returned
function fbrClone(from, to) {
if (from == null || typeof from != "object") return from;
if (from.constructor != Object && from.constructor != Array) return from;
if (from.constructor == Date || from.constructor == RegExp || from.constructor == Function ||
from.constructor == String || from.constructor == Number || from.constructor == Boolean)
return new from.constructor(from);
to = to || new from.constructor();
for (var name in from) {
to[name] = typeof to[name] == "undefined" ? fbrClone(from[name], null) : to[name];
}
return to;
}
}
function FileBufferReaderHelper() {
var fbrHelper = this;
function processInWebWorker(_function) {
var blob = URL.createObjectURL(new Blob([_function.toString(),
'this.onmessage = function (e) {' + _function.name + '(e.data);}'
], {
type: 'application/javascript'
}));
if (!window.fileBufferWorker) {
window.fileBufferWorker = new Worker(blob);
}
return window.fileBufferWorker;
}
fbrHelper.readAsArrayBuffer = function(fbr, options) {
var earlyCallback = options.earlyCallback;
delete options.earlyCallback;
function processChunk(chunk) {
if (!fbr.chunks[chunk.uuid]) {
fbr.chunks[chunk.uuid] = {
currentPosition: -1
};
}
options.extra = options.extra || {
userid: 0
};
chunk.userid = options.userid || options.extra.userid || 0;
chunk.extra = options.extra;
fbr.chunks[chunk.uuid][chunk.currentPosition] = chunk;
if (chunk.end && earlyCallback) {
earlyCallback(chunk.uuid);
earlyCallback = null;
}
if ((chunk.maxChunks > 5 && chunk.currentPosition == 5) && earlyCallback) {
earlyCallback(chunk.uuid);
earlyCallback = null;
}
}
if (!!navigator.mozGetUserMedia) {
window.___Worker = window.Worker;
delete window.Worker;
}
if (!!window.Worker && typeof Worker === 'function') {
var webWorker = processInWebWorker(fileReaderWrapper);
webWorker.onmessage = function(event) {
processChunk(event.data);
};
webWorker.postMessage(options);
} else {
fileReaderWrapper(options, processChunk);
if (!!navigator.mozGetUserMedia) {
window.Worker = window.___Worker;
}
}
};
function fileReaderWrapper(options, callback) {
callback = callback || function(chunk) {
postMessage(chunk);
};
var file = options.file;
if (!file.uuid) {
file.uuid = options.fileUniqueId || (Math.random() * 100).toString().replace(/\./g, '');
}
var chunkSize = options.chunkSize || 15 * 1000;
var sliceId = 0;
var cacheSize = chunkSize;
var chunksPerSlice = Math.floor(Math.min(100000000, cacheSize) / chunkSize);
var sliceSize = chunksPerSlice * chunkSize;
var maxChunks = Math.ceil(file.size / chunkSize);
file.maxChunks = maxChunks;
var numOfChunksInSlice;
var currentPosition = 0;
var hasEntireFile;
var chunks = [];
callback({
currentPosition: currentPosition,
uuid: file.uuid,
maxChunks: maxChunks,
size: file.size,
name: file.name || options.extra.fileName,
type: file.type,
lastModifiedDate: !!file.lastModifiedDate ? file.lastModifiedDate.toString() : '',
start: true,
extra: options.extra || options,
url: URL.createObjectURL(file)
});
var blob, reader = new FileReader();
reader.onloadend = function(evt) {
if (evt.target.readyState == FileReader.DONE) {
addChunks(file.name, evt.target.result, function() {
sliceId++;
if ((sliceId + 1) * sliceSize < file.size) {
blob = file.slice(sliceId * sliceSize, (sliceId + 1) * sliceSize);
reader.readAsArrayBuffer(blob);
} else if (sliceId * sliceSize < file.size) {
blob = file.slice(sliceId * sliceSize, file.size);
reader.readAsArrayBuffer(blob);
} else {
callback({
currentPosition: currentPosition,
uuid: file.uuid,
maxChunks: maxChunks,
size: file.size,
name: file.name || options.extra.fileName,
lastModifiedDate: !!file.lastModifiedDate ? file.lastModifiedDate.toString() : '',
url: URL.createObjectURL(file),
type: file.type,
end: true,
extra: options.extra || options
});
}
});
}
};
currentPosition += 1;
blob = file.slice(sliceId * sliceSize, (sliceId + 1) * sliceSize);
reader.readAsArrayBuffer(blob);
function addChunks(fileName, binarySlice, addChunkCallback) {
numOfChunksInSlice = Math.ceil(binarySlice.byteLength / chunkSize);
for (var i = 0; i < numOfChunksInSlice; i++) {
var start = i * chunkSize;
chunks[currentPosition] = binarySlice.slice(start, Math.min(start + chunkSize, binarySlice.byteLength));
callback({
uuid: file.uuid,
buffer: chunks[currentPosition],
currentPosition: currentPosition,
maxChunks: maxChunks,
size: file.size,
name: file.name || options.extra.fileName,
lastModifiedDate: !!file.lastModifiedDate ? file.lastModifiedDate.toString() : '',
type: file.type,
extra: options.extra || options
});
currentPosition++;
}
if (currentPosition == maxChunks) {
hasEntireFile = true;
}
addChunkCallback();
}
}
}
window.FileSelector = function() {
var selector = this;
selector.selectSingleFile = selectFile;
selector.selectMultipleFiles = function(callback) {
selectFile(callback, true);
};
function selectFile(callback, multiple) {
var file = document.createElement('input');
file.type = 'file';
if (multiple) {
file.multiple = true;
}
file.onchange = function() {
if (multiple) {
if (!file.files.length) {
console.error('No file selected.');
return;
}
callback(file.files);
return;
}
if (!file.files[0]) {
console.error('No file selected.');
return;
}
callback(file.files[0]);
file.parentNode.removeChild(file);
};
file.style.display = 'none';
(document.body || document.documentElement).appendChild(file);
fireClickEvent(file);
}
function fireClickEvent(element) {
var evt = new window.MouseEvent('click', {
view: window,
bubbles: true,
cancelable: true,
button: 0,
buttons: 0,
mozInputSource: 1
});
var fired = element.dispatchEvent(evt);
}
};
function FileBufferReceiver(fbr) {
var packets = {};
var missedChunks = [];
function receive(chunk, callback) {
if (!chunk.uuid) {
fbr.convertToObject(chunk, function(object) {
receive(object);
});
return;
}
if (chunk.start && !packets[chunk.uuid]) {
packets[chunk.uuid] = [];
if (!!missedChunks[chunk.uuid]) {
packets[chunk.uuid].push(chunk.buffer);
// need to order "missedChunks" here
missedChunks[chunk.uuid].forEach(function(chunk) {
receive(chunk, callback);
});
delete missedChunks[chunk.uuid];
}
if (fbr.onBegin) fbr.onBegin(chunk);
}
if (!chunk.end && chunk.buffer) {
if (!packets[chunk.uuid]) {
// seems {start:true} is skipped or lost or unordered.
if (!missedChunks[chunk.uuid]) {
missedChunks[chunk.uuid] = [];
}
missedChunks[chunk.uuid].push(chunk);
return;
}
if (packets[chunk.uuid].indexOf(chunk.buffer) == -1) {
packets[chunk.uuid].push(chunk.buffer);
}
}
if (chunk.end) {
var _packets = packets[chunk.uuid];
var finalArray = [],
length = _packets.length;
for (var i = 0; i < length; i++) {
if (!!_packets[i]) {
finalArray.push(_packets[i]);
}
}
var blob = new Blob(finalArray, {
type: chunk.type
});
blob = merge(blob, chunk);
blob.url = URL.createObjectURL(blob);
blob.uuid = chunk.uuid || blob.extra.fileUniqueId;
blob.name = blob.name || blob.extra.fileName;
if (!blob.size) console.error('Something went wrong. Blob Size is 0.');
if (fbr.onEnd) fbr.onEnd(blob);
}
if (chunk.buffer && fbr.onProgress) fbr.onProgress(chunk);
if (!chunk.end) callback(chunk.uuid);
}
function merge(mergein, mergeto) {
if (!mergein) mergein = {};
if (!mergeto) return mergein;
for (var item in mergeto) {
mergein[item] = mergeto[item];
}
return mergein;
}
this.receive = receive;
}
var FileConverter = {
ConvertToArrayBuffer: function(object, callback) {
binarize.pack(object, function(dataView) {
callback(dataView.buffer);
});
},
ConvertToObject: function(buffer, callback) {
binarize.unpack(buffer, callback);
}
};
function merge(mergein, mergeto) {
if (!mergein) mergein = {};
if (!mergeto) return mergein;
for (var item in mergeto) {
mergein[item] = mergeto[item];
}
return mergein;
}
/*
Copyright 2013 Eiji Kitamura
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Author: Eiji Kitamura (agektmr@gmail.com)
*/
(function(root) {
var debug = false;
var BIG_ENDIAN = false,
LITTLE_ENDIAN = true,
TYPE_LENGTH = Uint8Array.BYTES_PER_ELEMENT,
LENGTH_LENGTH = Uint16Array.BYTES_PER_ELEMENT,
BYTES_LENGTH = Uint32Array.BYTES_PER_ELEMENT;
var Types = {
NULL: 0,
UNDEFINED: 1,
STRING: 2,
NUMBER: 3,
BOOLEAN: 4,
ARRAY: 5,
OBJECT: 6,
INT8ARRAY: 7,
INT16ARRAY: 8,
INT32ARRAY: 9,
UINT8ARRAY: 10,
UINT16ARRAY: 11,
UINT32ARRAY: 12,
FLOAT32ARRAY: 13,
FLOAT64ARRAY: 14,
ARRAYBUFFER: 15,
BLOB: 16,
FILE: 16,
BUFFER: 17 // Special type for node.js
};
if (debug) {
var TypeNames = [
'NULL',
'UNDEFINED',
'STRING',
'NUMBER',
'BOOLEAN',
'ARRAY',
'OBJECT',
'INT8ARRAY',
'INT16ARRAY',
'INT32ARRAY',
'UINT8ARRAY',
'UINT16ARRAY',
'UINT32ARRAY',
'FLOAT32ARRAY',
'FLOAT64ARRAY',
'ARRAYBUFFER',
'BLOB',
'BUFFER'
];
}
var Length = [
null, // Types.NULL
null, // Types.UNDEFINED
'Uint16', // Types.STRING
'Float64', // Types.NUMBER
'Uint8', // Types.BOOLEAN
null, // Types.ARRAY
null, // Types.OBJECT
'Int8', // Types.INT8ARRAY
'Int16', // Types.INT16ARRAY
'Int32', // Types.INT32ARRAY
'Uint8', // Types.UINT8ARRAY
'Uint16', // Types.UINT16ARRAY
'Uint32', // Types.UINT32ARRAY
'Float32', // Types.FLOAT32ARRAY
'Float64', // Types.FLOAT64ARRAY
'Uint8', // Types.ARRAYBUFFER
'Uint8', // Types.BLOB, Types.FILE
'Uint8' // Types.BUFFER
];
var binary_dump = function(view, start, length) {
var table = [],
endianness = BIG_ENDIAN,
ROW_LENGTH = 40;
table[0] = [];
for (var i = 0; i < ROW_LENGTH; i++) {
table[0][i] = i < 10 ? '0' + i.toString(10) : i.toString(10);
}
for (i = 0; i < length; i++) {
var code = view.getUint8(start + i, endianness);
var index = ~~(i / ROW_LENGTH) + 1;
if (typeof table[index] === 'undefined') table[index] = [];
table[index][i % ROW_LENGTH] = code < 16 ? '0' + code.toString(16) : code.toString(16);
}
console.log('%c' + table[0].join(' '), 'font-weight: bold;');
for (i = 1; i < table.length; i++) {
console.log(table[i].join(' '));
}
};
var find_type = function(obj) {
var type = undefined;
if (obj === undefined) {
type = Types.UNDEFINED;
} else if (obj === null) {
type = Types.NULL;
} else {
var const_name = obj.constructor.name;
if (const_name !== undefined) {
// return type by .constructor.name if possible
type = Types[const_name.toUpperCase()];
} else {
// Work around when constructor.name is not defined
switch (typeof obj) {
case 'string':
type = Types.STRING;
break;
case 'number':
type = Types.NUMBER;
break;
case 'boolean':
type = Types.BOOLEAN;
break;
case 'object':
if (obj instanceof Array) {
type = Types.ARRAY;
} else if (obj instanceof Int8Array) {
type = Types.INT8ARRAY;
} else if (obj instanceof Int16Array) {
type = Types.INT16ARRAY;
} else if (obj instanceof Int32Array) {
type = Types.INT32ARRAY;
} else if (obj instanceof Uint8Array) {
type = Types.UINT8ARRAY;
} else if (obj instanceof Uint16Array) {
type = Types.UINT16ARRAY;
} else if (obj instanceof Uint32Array) {
type = Types.UINT32ARRAY;
} else if (obj instanceof Float32Array) {
type = Types.FLOAT32ARRAY;
} else if (obj instanceof Float64Array) {
type = Types.FLOAT64ARRAY;
} else if (obj instanceof ArrayBuffer) {
type = Types.ARRAYBUFFER;
} else if (obj instanceof Blob) { // including File
type = Types.BLOB;
} else if (obj instanceof Buffer) { // node.js only
type = Types.BUFFER;
} else if (obj instanceof Object) {
type = Types.OBJECT;
}
break;
default:
break;
}
}
}
return type;
};
var utf16_utf8 = function(string) {
return unescape(encodeURIComponent(string));
};
var utf8_utf16 = function(bytes) {
return decodeURIComponent(escape(bytes));
};
/**
* packs seriarized elements array into a packed ArrayBuffer
* @param {Array} serialized Serialized array of elements.
* @return {DataView} view of packed binary
*/
var pack = function(serialized) {
var cursor = 0,
i = 0,
j = 0,
endianness = BIG_ENDIAN;
var ab = new ArrayBuffer(serialized[0].byte_length + serialized[0].header_size);
var view = new DataView(ab);
for (i = 0; i < serialized.length; i++) {
var start = cursor,
header_size = serialized[i].header_size,
type = serialized[i].type,
length = serialized[i].length,
value = serialized[i].value,
byte_length = serialized[i].byte_length,
type_name = Length[type],
unit = type_name === null ? 0 : root[type_name + 'Array'].BYTES_PER_ELEMENT;
// Set type
if (type === Types.BUFFER) {
// on node.js Blob is emulated using Buffer type
view.setUint8(cursor, Types.BLOB, endianness);
} else {
view.setUint8(cursor, type, endianness);
}
cursor += TYPE_LENGTH;
if (debug) {
console.info('Packing', type, TypeNames[type]);
}
// Set length if required
if (type === Types.ARRAY || type === Types.OBJECT) {
view.setUint16(cursor, length, endianness);
cursor += LENGTH_LENGTH;
if (debug) {
console.info('Content Length', length);
}
}
// Set byte length
view.setUint32(cursor, byte_length, endianness);
cursor += BYTES_LENGTH;
if (debug) {
console.info('Header Size', header_size, 'bytes');
console.info('Byte Length', byte_length, 'bytes');
}
switch (type) {
case Types.NULL:
case Types.UNDEFINED:
// NULL and UNDEFINED doesn't have any payload
break;
case Types.STRING:
if (debug) {
console.info('Actual Content %c"' + value + '"', 'font-weight:bold;');
}
for (j = 0; j < length; j++, cursor += unit) {
view.setUint16(cursor, value.charCodeAt(j), endianness);
}
break;
case Types.NUMBER:
case Types.BOOLEAN:
if (debug) {
console.info('%c' + value.toString(), 'font-weight:bold;');
}
view['set' + type_name](cursor, value, endianness);
cursor += unit;
break;
case Types.INT8ARRAY:
case Types.INT16ARRAY:
case Types.INT32ARRAY:
case Types.UINT8ARRAY:
case Types.UINT16ARRAY:
case Types.UINT32ARRAY:
case Types.FLOAT32ARRAY:
case Types.FLOAT64ARRAY:
var _view = new Uint8Array(view.buffer, cursor, byte_length);
_view.set(new Uint8Array(value.buffer));
cursor += byte_length;
break;
case Types.ARRAYBUFFER:
case Types.BUFFER:
var _view = new Uint8Array(view.buffer, cursor, byte_length);
_view.set(new Uint8Array(value));
cursor += byte_length;
break;
case Types.BLOB:
case Types.ARRAY:
case Types.OBJECT:
break;
default:
throw 'TypeError: Unexpected type found.';
}
if (debug) {
binary_dump(view, start, cursor - start);
}
}
return view;
};
/**
* Unpack binary data into an object with value and cursor
* @param {DataView} view [description]
* @param {Number} cursor [description]
* @return {Object}
*/
var unpack = function(view, cursor) {
var i = 0,
endianness = BIG_ENDIAN,
start = cursor;
var type, length, byte_length, value, elem;
// Retrieve "type"
type = view.getUint8(cursor, endianness);
cursor += TYPE_LENGTH;
if (debug) {
console.info('Unpacking', type, TypeNames[type]);
}
// Retrieve "length"
if (type === Types.ARRAY || type === Types.OBJECT) {
length = view.getUint16(cursor, endianness);
cursor += LENGTH_LENGTH;
if (debug) {
console.info('Content Length', length);
}
}
// Retrieve "byte_length"
byte_length = view.getUint32(cursor, endianness);
cursor += BYTES_LENGTH;
if (debug) {
console.info('Byte Length', byte_length, 'bytes');
}
var type_name = Length[type];
var unit = type_name === null ? 0 : root[type_name + 'Array'].BYTES_PER_ELEMENT;
switch (type) {
case Types.NULL:
case Types.UNDEFINED:
if (debug) {
binary_dump(view, start, cursor - start);
}
// NULL and UNDEFINED doesn't have any octet
value = null;
break;
case Types.STRING:
length = byte_length / unit;
var string = [];
for (i = 0; i < length; i++) {
var code = view.getUint16(cursor, endianness);
cursor += unit;
string.push(String.fromCharCode(code));
}
value = string.join('');
if (debug) {
console.info('Actual Content %c"' + value + '"', 'font-weight:bold;');
binary_dump(view, start, cursor - start);
}
break;
case Types.NUMBER:
value = view.getFloat64(cursor, endianness);
cursor += unit;
if (debug) {
console.info('Actual Content %c"' + value.toString() + '"', 'font-weight:bold;');
binary_dump(view, start, cursor - start);
}
break;
case Types.BOOLEAN:
value = view.getUint8(cursor, endianness) === 1 ? true : false;
cursor += unit;
if (debug) {
console.info('Actual Content %c"' + value.toString() + '"', 'font-weight:bold;');
binary_dump(view, start, cursor - start);
}
break;
case Types.INT8ARRAY:
case Types.INT16ARRAY:
case Types.INT32ARRAY:
case Types.UINT8ARRAY:
case Types.UINT16ARRAY:
case Types.UINT32ARRAY:
case Types.FLOAT32ARRAY:
case Types.FLOAT64ARRAY:
case Types.ARRAYBUFFER:
elem = view.buffer.slice(cursor, cursor + byte_length);
cursor += byte_length;
// If ArrayBuffer
if (type === Types.ARRAYBUFFER) {
value = elem;
// If other TypedArray
} else {
value = new root[type_name + 'Array'](elem);
}
if (debug) {
binary_dump(view, start, cursor - start);
}
break;
case Types.BLOB:
if (debug) {
binary_dump(view, start, cursor - start);
}
// If Blob is available (on browser)
if (root.Blob) {
var mime = unpack(view, cursor);
var buffer = unpack(view, mime.cursor);
cursor = buffer.cursor;
value = new Blob([buffer.value], {
type: mime.value
});
} else {
// node.js implementation goes here
elem = view.buffer.slice(cursor, cursor + byte_length);
cursor += byte_length;
// node.js implementatino uses Buffer to help Blob
value = new Buffer(elem);
}
break;
case Types.ARRAY:
if (debug) {
binary_dump(view, start, cursor - start);
}
value = [];
for (i = 0; i < length; i++) {
// Retrieve array element
elem = unpack(view, cursor);
cursor = elem.cursor;
value.push(elem.value);
}
break;
case Types.OBJECT:
if (debug) {
binary_dump(view, start, cursor - start);
}
value = {};
for (i = 0; i < length; i++) {
// Retrieve object key and value in sequence
var key = unpack(view, cursor);
var val = unpack(view, key.cursor);
cursor = val.cursor;
value[key.value] = val.value;
}
break;
default:
throw 'TypeError: Type not supported.';
}
return {
value: value,
cursor: cursor
};
};
/**
* deferred function to process multiple serialization in order
* @param {array} array [description]
* @param {Function} callback [description]
* @return {void} no return value
*/
var deferredSerialize = function(array, callback) {
var length = array.length,
results = [],
count = 0,
byte_length = 0;
for (var i = 0; i < array.length; i++) {
(function(index) {
serialize(array[index], function(result) {
// store results in order
results[index] = result;
// count byte length
byte_length += result[0].header_size + result[0].byte_length;
// when all results are on table
if (++count === length) {
// finally concatenate all reuslts into a single array in order
var array = [];
for (var j = 0; j < results.length; j++) {
array = array.concat(results[j]);
}
callback(array, byte_length);
}
});
})(i);
}
};
/**
* Serializes object and return byte_length
* @param {mixed} obj JavaScript object you want to serialize
* @return {Array} Serialized array object
*/
var serialize = function(obj, callback) {
var subarray = [],
unit = 1,
header_size = TYPE_LENGTH + BYTES_LENGTH,
type, byte_length = 0,
length = 0,
value = obj;
type = find_type(obj);
unit = Length[type] === undefined || Length[type] === null ? 0 :
root[Length[type] + 'Array'].BYTES_PER_ELEMENT;
switch (type) {
case Types.UNDEFINED:
case Types.NULL:
break;
case Types.NUMBER:
case Types.BOOLEAN:
byte_length = unit;
break;
case Types.STRING:
length = obj.length;
byte_length += length * unit;
break;
case Types.INT8ARRAY:
case Types.INT16ARRAY:
case Types.INT32ARRAY:
case Types.UINT8ARRAY:
case Types.UINT16ARRAY:
case Types.UINT32ARRAY:
case Types.FLOAT32ARRAY:
case Types.FLOAT64ARRAY:
length = obj.length;
byte_length += length * unit;
break;
case Types.ARRAY:
deferredSerialize(obj, function(subarray, byte_length) {
callback([{
type: type,
length: obj.length,
header_size: header_size + LENGTH_LENGTH,
byte_length: byte_length,
value: null
}].concat(subarray));
});
return;
case Types.OBJECT:
var deferred = [];
for (var key in obj) {
if (obj.hasOwnProperty(key)) {
deferred.push(key);
deferred.push(obj[key]);
length++;
}
}
deferredSerialize(deferred, function(subarray, byte_length) {
callback([{
type: type,
length: length,
header_size: header_size + LENGTH_LENGTH,
byte_length: byte_length,
value: null
}].concat(subarray));
});
return;
case Types.ARRAYBUFFER:
byte_length += obj.byteLength;
break;
case Types.BLOB:
var mime_type = obj.type;
var reader = new FileReader();
reader.onload = function(e) {
deferredSerialize([mime_type, e.target.result], function(subarray, byte_length) {
callback([{
type: type,
length: length,
header_size: header_size,
byte_length: byte_length,
value: null
}].concat(subarray));
});
};
reader.onerror = function(e) {
throw 'FileReader Error: ' + e;
};
reader.readAsArrayBuffer(obj);
return;
case Types.BUFFER:
byte_length += obj.length;
break;
default:
throw 'TypeError: Type "' + obj.constructor.name + '" not supported.';
}
callback([{
type: type,
length: length,
header_size: header_size,
byte_length: byte_length,
value: value
}].concat(subarray));
};
/**
* Deserialize binary and return JavaScript object
* @param ArrayBuffer buffer ArrayBuffer you want to deserialize
* @return mixed Retrieved JavaScript object
*/
var deserialize = function(buffer, callback) {
var view = buffer instanceof DataView ? buffer : new DataView(buffer);
var result = unpack(view, 0);
return result.value;
};
if (debug) {
root.Test = {
BIG_ENDIAN: BIG_ENDIAN,
LITTLE_ENDIAN: LITTLE_ENDIAN,
Types: Types,
pack: pack,
unpack: unpack,
serialize: serialize,
deserialize: deserialize
};
}
var binarize = {
pack: function(obj, callback) {
try {
if (debug) console.info('%cPacking Start', 'font-weight: bold; color: red;', obj);
serialize(obj, function(array) {
if (debug) console.info('Serialized Object', array);
callback(pack(array));
});
} catch (e) {
throw e;
}
},
unpack: function(buffer, callback) {
try {
if (debug) console.info('%cUnpacking Start', 'font-weight: bold; color: red;', buffer);
var result = deserialize(buffer);
if (debug) console.info('Deserialized Object', result);
callback(result);
} catch (e) {
throw e;
}
}
};
if (typeof module !== 'undefined' && module.exports) {
module.exports = binarize;
} else {
root.binarize = binarize;
}
})(typeof global !== 'undefined' ? global : this);