bin-utils.js
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/**
* @file bin-utils.js
*/
/**
* convert a TimeRange to text
*
* @param {TimeRange} range the timerange to use for conversion
* @param {Number} i the iterator on the range to convert
*/
'use strict';
Object.defineProperty(exports, '__esModule', {
value: true
});
var textRange = function textRange(range, i) {
return range.start(i) + '-' + range.end(i);
};
/**
* format a number as hex string
*
* @param {Number} e The number
* @param {Number} i the iterator
*/
var formatHexString = function formatHexString(e, i) {
var value = e.toString(16);
return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : '');
};
var formatAsciiString = function formatAsciiString(e) {
if (e >= 0x20 && e < 0x7e) {
return String.fromCharCode(e);
}
return '.';
};
/**
* Creates an object for sending to a web worker modifying properties that are TypedArrays
* into a new object with seperated properties for the buffer, byteOffset, and byteLength.
*
* @param {Object} message
* Object of properties and values to send to the web worker
* @return {Object}
* Modified message with TypedArray values expanded
* @function createTransferableMessage
*/
var createTransferableMessage = function createTransferableMessage(message) {
var transferable = {};
Object.keys(message).forEach(function (key) {
var value = message[key];
if (ArrayBuffer.isView(value)) {
transferable[key] = {
bytes: value.buffer,
byteOffset: value.byteOffset,
byteLength: value.byteLength
};
} else {
transferable[key] = value;
}
});
return transferable;
};
/**
* Returns a unique string identifier for a media initialization
* segment.
*/
var initSegmentId = function initSegmentId(initSegment) {
var byterange = initSegment.byterange || {
length: Infinity,
offset: 0
};
return [byterange.length, byterange.offset, initSegment.resolvedUri].join(',');
};
/**
* utils to help dump binary data to the console
*/
var utils = {
hexDump: function hexDump(data) {
var bytes = Array.prototype.slice.call(data);
var step = 16;
var result = '';
var hex = undefined;
var ascii = undefined;
for (var j = 0; j < bytes.length / step; j++) {
hex = bytes.slice(j * step, j * step + step).map(formatHexString).join('');
ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join('');
result += hex + ' ' + ascii + '\n';
}
return result;
},
tagDump: function tagDump(tag) {
return utils.hexDump(tag.bytes);
},
textRanges: function textRanges(ranges) {
var result = '';
var i = undefined;
for (i = 0; i < ranges.length; i++) {
result += textRange(ranges, i) + ' ';
}
return result;
},
createTransferableMessage: createTransferableMessage,
initSegmentId: initSegmentId
};
exports['default'] = utils;
module.exports = exports['default'];