@l5i/dashjs/src/streaming/metrics/controllers/MetricsController.js

A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.

/**
 * The copyright in this software is being made available under the BSD License,
 * included below. This software may be subject to other third party and contributor
 * rights, including patent rights, and no such rights are granted under this license.
 *
 * Copyright (c) 2013, Dash Industry Forum.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *  * Redistributions of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation and/or
 *  other materials provided with the distribution.
 *  * Neither the name of Dash Industry Forum nor the names of its
 *  contributors may be used to endorse or promote products derived from this software
 *  without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
 *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */

import RangeController from './RangeController';
import ReportingController from './ReportingController';
import MetricsHandlersController from './MetricsHandlersController';

function MetricsController(config) {

    config = config || {};
    let metricsHandlersController,
        reportingController,
        rangeController,
        instance;

    let context = this.context;

    function initialize(metricsEntry) {
        try {
            rangeController = RangeController(context).create({
                mediaElement: config.mediaElement
            });

            rangeController.initialize(metricsEntry.Range);

            reportingController = ReportingController(context).create({
                debug: config.debug,
                metricsConstants: config.metricsConstants
            });

            reportingController.initialize(metricsEntry.Reporting, rangeController);

            metricsHandlersController = MetricsHandlersController(context).create({
                debug: config.debug,
                eventBus: config.eventBus,
                metricsConstants: config.metricsConstants,
                events: config.events
            });

            metricsHandlersController.initialize(metricsEntry.metrics, reportingController);
        } catch (e) {
            reset();
            throw e;
        }
    }

    function reset() {
        if (metricsHandlersController) {
            metricsHandlersController.reset();
        }

        if (reportingController) {
            reportingController.reset();
        }

        if (rangeController) {
            rangeController.reset();
        }
    }

    instance = {
        initialize: initialize,
        reset:      reset
    };

    return instance;
}

MetricsController.__dashjs_factory_name = 'MetricsController';
export default dashjs.FactoryMaker.getClassFactory(MetricsController); /* jshint ignore:line */