dvbcss-clocks/src/measurePrecision.js

Javascript library implementing clock objects for modelling timelines. Useful in DVB CSS implementations.

/****************************************************************************
 * Copyright 2017 British Broadcasting Corporation
 * 
 * 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.
*****************************************************************************/

var measurePrecision = function(timeFunc, sampleSize) {
    var diffs = [];
    while (diffs.length < sampleSize) {
        var a = timeFunc();
        var b = timeFunc();
        if (a<b) {
            diffs.push(b-a);
        }
    }
    return Math.min.apply(this, diffs);
};

module.exports = measurePrecision;