audio-spectrum-main.js

// Copyright 2014, 2015, 2016 Kevin Reid <kpreid@switchb.org>
//
// This file is part of ShinySDR.
//
// ShinySDR is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// ShinySDR is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with ShinySDR.  If not, see <http://www.gnu.org/licenses/>.

'use strict';

requirejs.config({
    baseUrl: 'client/'
});
define([
    'audio/analyser',
    'audio/client-source',
    'coordination',
    'events',
    'values',
    'widget',
    'widgets',
], (
    import_audio_analyser,
    import_audio_client_source,
    import_coordination,
    import_events,
    import_values,
    import_widget,
    widgets
) => {
    const {
        AudioAnalyserAdapter,
    } = import_audio_analyser;
    const {
        AudioSourceSelector,
    } = import_audio_client_source;
    const {
        ClientStateObject,
    } = import_coordination;
    const {
        Scheduler,
    } = import_events;
    const {
        ConstantCell,
        StorageNamespace,
    } = import_values;
    const {
        Context,
        createWidgets,
    } = import_widget;

    const scheduler = new Scheduler();
    const audioContext = new AudioContext({
        sampleRate: 96000,
    });
     const storage = sessionStorage; // TODO persistent and namespaced-from-other-pages

    const selector = new AudioSourceSelector(scheduler, audioContext, navigator.mediaDevices,
        new StorageNamespace(storage, 'input-selector.'));
    const adapter = new AudioAnalyserAdapter(scheduler, audioContext);
    adapter.connectFrom(selector.source);
    adapter.paused.set(false);

    // kludge: stick extra property on adapter so it gets in the options menu UI.
    // TODO: Replace this by adding flexibility to the UI system.
    adapter.input = new ConstantCell(selector);

    const root = new ConstantCell(adapter);

    const context = new Context({
        widgets: widgets,
        // Using sessionStorage because we want default settings and because our storage usage doesn't yet distinguish between different pages.
        clientState: new ClientStateObject(sessionStorage, null),
        scheduler: scheduler
    });

    createWidgets(root, context, document);
});