variabletime/bin/web/js/audio.js

import {
    mapValue,
    mix,
    toCssClass,
    flattenObject,
    deFlattenObject,
    clone,
} from './utils.js';

window.mapValue = mapValue;


const AudioMappingOptions = function() {
    this.min_freq = 0.0;
    this.max_freq = config.audio.fftBandsUsed;
    this.min_in = 0.0;
    this.max_in = 255.0;
    this.min_out = 0.0;
    this.max_out = 1.0;
    this.smoothing = config.audio.defaultSmoothing;
    this.sync = 'volume';
    this.source = 'microphone';
    this.value = 0.0;
    this.muted = true;
};

const Audio = function(tp, record) {

    const audioDom = document.querySelector('.audioWrapper');
    let audioCtx = false;
    const heading = audioDom.querySelector("h1");
    heading.textContent = "CLICK HERE TO START";

    // an array of possible sync options.
    const audio_sync_options = ['volume', 'pitch', 'clarity'];
    // could also be an enum
    // like that
    //const AudioSyncOptions = Object.freeze({
        //RED:   Symbol("volume"),
        //BLUE:  Symbol("pitch"),
        //GREEN: Symbol("frequency"),
        //toString: (e) => {
            //return e.toString.match(/\(([\S\s]*)\)/)[1]
        //},
    //});
    //document.body.addEventListener("click", init);
    let started = false;

    let mapping = {};
    let savedMapping = {};
    //const canvass = [];
    let canvasCombos = {};
    const mutationObserver = new MutationObserver(function(e) {
        if (e[0].removedNodes) {
            e[0].removedNodes.forEach((n) => {
                if (typeof n === 'object' &&
                    n.hasOwnProperty('hasAttribute') &&
                    n.hasOwnProperty('querySelectorAll')) {
                    if (n.hasAttribute('data-propTitle')) {
                        const propTitle = n.getAttribute('data-propTitle');
                        delete canvasCombos[propTitle];
                    } else {
                        const subProps = n.querySelectorAll('[data-propTitle]');
                        if (subProps.length > 0) {
                            subProps.forEach((sp) => {
                                const propTitle = sp.getAttribute('data-propTitle');
                                delete canvasCombos[propTitle];
                            });
                        }
                    }
                }
            });
        }
    });
    let areMutationsObserved = false;

    const isMapped = (layer, propTitle) => {
        if (!mapping.hasOwnProperty(layer.id())) {
            return false;
        }
        if (!mapping[layer.id()].hasOwnProperty(propTitle)) {
            if (propTitle === 'color' &&
                config.audio.colorSeparateRGBA &&
                mapping[layer.id()].hasOwnProperty('color.r') &&
                mapping[layer.id()].hasOwnProperty('color.g') &&
                mapping[layer.id()].hasOwnProperty('color.b') &&
                mapping[layer.id()].hasOwnProperty('color.a')) {
                return true;
            }
            return false;
        }
        return true;
    };

    const getDefaultRange = (layer, propTitle) => {
        if (config.audio.defaultRange.hasOwnProperty(propTitle)) {
            return config.audio.defaultRange[propTitle];
        } else if (propTitle.indexOf('width') === 0) {
            return [
                getArtboard().theatreObject.value.width / 2,
                getArtboard().theatreObject.value.width
            ];
        } else if (propTitle.indexOf('y') === 0) {
            return [
                0,
                getArtboard().theatreObject.value.height / 2
            ];
        } else if (propTitle.indexOf('x') === 0) {
            return [
                0,
                getArtboard().theatreObject.value.width / 2
            ];
        } else if (propTitle.indexOf('y') === 0) {
            return [
                0,
                getArtboard().theatreObject.value.height / 2
            ];
        } else if (propTitle.indexOf('letterDelay') === 0) {
            return [
                config.audio.defaultRange.letterDelays[0],
                config.audio.defaultRange.letterDelays[1]
            ];
        } else if (propTitle.split('.')[0] === 'fontVariationAxes') {
            return layer.props.fontVariationAxes
                .props[propTitle.split('.')[1]].range;
        }
    };

    const getAudioMappingOptions = (layer, propTitle) => {
        if (savedMapping.hasOwnProperty(layer.id()) && savedMapping[layer.id()].hasOwnProperty(propTitle)) {
            return savedMapping[layer.id()][propTitle];
        } else if (propTitle === 'color') {
            const mm = getDefaultRange(layer, 'color');
            if (config.audio.colorSeparateRGBA) {
                const r = new AudioMappingOptions();
                r.min_out = mm[0];
                r.max_out = mm[1];
                const g = new AudioMappingOptions();
                g.min_out = mm[0];
                g.max_out = mm[1];
                const b = new AudioMappingOptions();
                b.min_out = mm[0];
                b.max_out = mm[1];
                const a = new AudioMappingOptions();
                a.min_out = 1.0; // NOTE: dirty, dirty
                a.max_out = 1.0; // hardcoded value, you
                return [{r}, {g}, {b}, {a}];
            } else {
                const o = new AudioMappingOptions();
                o.min_out = {r: mm[0], b: mm[0], g: mm[0], a: mm[0]};
                o.max_out = {r: mm[1], b: mm[1], g: mm[1], a: mm[1]};
                return o;
            }
        } else {
            const o = new AudioMappingOptions();
            const mm = getDefaultRange(layer, propTitle);
            o.min_out = mm[0];
            o.max_out = mm[1];
            return o;
        }
    };

    // potentially recursive
    const addAudioMapping = (layer, propTitle, options = false) => {
        if (!options) {
            options = getAudioMappingOptions(layer, propTitle);
            if (Array.isArray(options)) {
                let isGood = true;
                options.forEach((o) => {
                    const subPropKey = Object.keys(o)[0];
                    const subPropTitle = `${propTitle}.${subPropKey}`;
                    isGood = addAudioMapping(layer, subPropTitle, o[subPropKey]) ? isGood : false; 
                });
                return isGood;
            }
        }
        if (!mapping.hasOwnProperty(layer.id())) {
            mapping[layer.id()] = {};
        }
        if (!mapping[layer.id()].hasOwnProperty(propTitle)) {
            mapping[layer.id()][propTitle] = options;
            return true;
        } else {
            // already there
            return false;
        }
    };

    const removeAudioMapping = (layer = false, propTitle = false) => {
        if (!layer && !propTitle) {
            Object.keys(mapping).forEach((layerID) => {
                Object.keys(mapping[layerID]).forEach((propTitle) => {
                    delete mapping[layerID][propTitle];
                });
                delete mapping[layerID];
            });
            return true;
        }
        if (!mapping.hasOwnProperty(layer.id())) {
            // no layer
            return false;
        }
        if (!mapping[layer.id()].hasOwnProperty(propTitle)) {
            // no propTitle
            // perhaps color?
            if (config.audio.colorSeparateRGBA && propTitle === 'color') {
                let isGood = true;
                isGood = removeAudioMapping(layer, 'color.r');
                isGood = removeAudioMapping(layer, 'color.g');
                isGood = removeAudioMapping(layer, 'color.b');
                isGood = removeAudioMapping(layer, 'color.a');
                return isGood;
            }
            return false;
        }
        delete mapping[layer.id()][propTitle];
        if (Object.keys(mapping[layer.id()]).length === 0) {
            delete mapping[layer.id()];
        }
        return true;
    }

    const createAudioOptions = (layer, propTitle, container) => {
        const mappingOptions = mapping[layer.id()][propTitle];
        let hasLetterDelay = //false;
            config
            .layer.letterDelayProps
            .indexOf(propTitle.split('.')[0]) >= 0 && propTitle.indexOf('color') < 0
            && !tp.isSequenced(propTitle);
        const panel = tp.getPanel();
        if (!areMutationsObserved) {
            mutationObserver.observe(panel, { childList: true, subtree: true });
            areMutationsObserved = true;
        }
        const audioOptions = document.createElement('div');
        audioOptions.setAttribute('data-propTitle',propTitle);
        audioOptions.classList.add('audioOptions');
        audioOptions.classList.add('audioOptionsTypeDefault');
        audioOptions.classList.add(toCssClass(`audioOptions${propTitle}`));
        audioOptions.style.position = 'relative';
        audioOptions.style.width = '100%';
        if (propTitle.split('.')[0] === 'color' && propTitle.split('.').length > 1) {
            audioOptions.classList.add(toCssClass('audioOptionscolor'));
            switch(propTitle.split('.')[1]) {
                case 'r': {
                    audioOptions.style.background = 'rgba(255,0,0,0.2)'; // AUDIO COLOR
                    break;
                }
                case 'g': {
                    audioOptions.style.background = 'rgba(0,255,0,0.2)'; // AUDIO COLOR
                    break;
                }
                case 'b': {
                    audioOptions.style.background = 'rgba(0,0,255,0.2)'; // AUDIO COLOR
                    break;
                }
                case 'a': {
                    audioOptions.style.background = 'rgba(255,255,255,0.2)'; // AUDIO COLOR
                    break;
                }
            }
        } else {
            audioOptions.style.background = 'rgba(163, 163, 163, 0.2)'; // AUDIO COLOR

        }
        audioOptions.style.order = parseInt(container.style.order) + 1;

        const updateMappingOptions = () => {
            mappingOptions.min_out = parseFloat(panel.querySelector(toCssClass(`audio_min${propTitle}`,'#')).value);
            mappingOptions.max_out = parseFloat(panel.querySelector(toCssClass(`audio_max${propTitle}`,'#')).value);
            mappingOptions.sync =
                panel.querySelector(`input[name="${toCssClass('audio_sync' + propTitle)}"]:checked`).value;
            const s = panel.querySelector(toCssClass(`audio_smoothing${propTitle}`,'#')).value;
            mappingOptions.smoothing = parseFloat(s);
            if (hasLetterDelay) {
                const ld = panel.querySelector(toCssClass(`audio_letterDelay${propTitle}`,'#'));
                mappingOptions.letterDelay = typeof ld.value === 'number' ? ld.value : parseInt(ld.value);
            }
            mappingOptions.source = panel.querySelector(toCssClass(`audio_source${propTitle}`,'#')).value;
            mappingOptions.muted = panel.querySelector(toCssClass(`audio_mute${propTitle}`,'#')).checked;

            if (!savedMapping.hasOwnProperty(layer.id())) {
                savedMapping[layer.id()] = {};
            }
            savedMapping[layer.id()][propTitle] = mappingOptions;
        };
        const source_Dom_Cont = document.createElement('div');
        source_Dom_Cont.classList.add('source_Dom_Cont');
        const source_Dom = document.createElement('select');
        source_Dom.id = toCssClass(`audio_source${propTitle}`);
        const source_mic = document.createElement('option');
        source_mic.value = 'microphone';
        source_mic.innerHTML = 'microphone';
        source_Dom.append(source_mic);
        FS.readdir(config.fs.idbfsAudioDir)
            .forEach((file) => {
                if (file[0] !== '.') {
                    const source_file = document.createElement('option');
                    source_file.value = file;
                    if (file.length > config.audio.maxFilenameLength) {
                        source_file.innerHTML = file.substr(0,6) + '..' + file.substr(file.length - 6, 6);
                    } else {
                        source_file.innerHTML = file;
                    }
                    source_Dom.append(source_file);
                }
            });
        source_Dom_Cont.append(source_Dom);
        audioOptions.append(source_Dom_Cont);

        const muteDom = document.createElement('input');
        const muteDom_label = document.createElement('label');
        muteDom.id = toCssClass(`audio_mute${propTitle}`);
        muteDom.name = toCssClass(`audio_mute${propTitle}`);
        muteDom.type = 'checkbox';
        muteDom.checked = true;
        muteDom_label.for = toCssClass(`audio_mute${propTitle}`);
        muteDom_label.innerHTML = 'muted';
        source_Dom_Cont.append(muteDom);
        source_Dom_Cont.append(muteDom_label);

        const min_max_Dom = document.createElement('div');
        min_max_Dom.classList.add('audio_min_max');
        const min_Cont = document.createElement('div');
        min_Cont.classList.add('audio_min_Cont');
        const min_inputDom_label = document.createElement('label');
        min_inputDom_label.for = 'audio_min';
        min_inputDom_label.innerHTML = 'min ';
        const min_inputDom = document.createElement('input');
        min_inputDom.type = 'number';
        min_inputDom.name = toCssClass(`audio_min${propTitle}`);
        min_inputDom.id = toCssClass(`audio_min${propTitle}`);
        min_inputDom.value = `${mappingOptions.min_out}`;
        const max_Cont = document.createElement('div');
        max_Cont.classList.add('audio_max_Cont');
        const max_inputDom_label = document.createElement('label');
        max_inputDom_label.for = 'audio_max';
        max_inputDom_label.innerHTML = 'max ';
        const max_inputDom = document.createElement('input');
        max_inputDom.type = 'number';
        max_inputDom.name = toCssClass(`audio_max${propTitle}`);
        max_inputDom.id = toCssClass(`audio_max${propTitle}`);
        max_inputDom.value = `${mappingOptions.max_out}`;
        const smoothing_inputDom_label = document.createElement('label');
        smoothing_inputDom_label.for = 'audio_smoothing';
        smoothing_inputDom_label.innerHTML = 'audio smoothing';
        const smoothing_inputDom = document.createElement('input');
        smoothing_inputDom.type = 'number';
        smoothing_inputDom.name = toCssClass(`audio_smoothing${propTitle}`);
        smoothing_inputDom.id = toCssClass(`audio_smoothing${propTitle}`);
        smoothing_inputDom.value = mappingOptions.smoothing;
        smoothing_inputDom.min = 0;
        smoothing_inputDom.max = 1;
        smoothing_inputDom.step = 0.01;
        min_max_Dom.append(smoothing_inputDom_label);
        min_max_Dom.append(smoothing_inputDom);
        min_max_Dom.append(min_Cont);
        min_Cont.append(min_inputDom_label);
        min_Cont.append(min_inputDom);
        min_max_Dom.append(max_Cont);
        max_Cont.append(max_inputDom_label);
        max_Cont.append(max_inputDom);
        if (hasLetterDelay) {
            const letterDelayCont = document.createElement('div');
            letterDelayCont.classList.add("letterDelayCont");
            const letterDelay_inputDom_label = document.createElement('label');
            letterDelay_inputDom_label.for = 'audio_letterDelay';
            letterDelay_inputDom_label.innerHTML = 'letterDelay';
            const letterDelay_inputDom = document.createElement('input');
            letterDelay_inputDom.type = 'number';
            letterDelay_inputDom.name = toCssClass(`audio_letterDelay${propTitle}`);
            letterDelay_inputDom.id = toCssClass(`audio_letterDelay${propTitle}`);
            letterDelay_inputDom.value = 0;
            letterDelay_inputDom.min = 0;
            letterDelay_inputDom.step = 1;
            letterDelayCont.append(letterDelay_inputDom_label);
            letterDelayCont.append(letterDelay_inputDom);
            min_max_Dom.append(letterDelayCont);
            letterDelay_inputDom.addEventListener('change', updateMappingOptions);
        }
        audioOptions.append(min_max_Dom);

        const sync_Dom = document.createElement('div');
        sync_Dom.classList.add('sync_Dom');
        const sync_titleDom = document.createElement('p');
        const sync_titleDom_Cont = document.createElement('div');
        sync_titleDom_Cont.classList.add('sync_titleDom_Cont');
        sync_titleDom.innerHTML = 'sync with:';
        sync_Dom.append(sync_titleDom);

        audio_sync_options.forEach((o) => {
            const sync_inputDom_Cont = document.createElement('div');
            sync_inputDom_Cont.classList.add('sync_inputDom_Cont');
            const sync_inputDom_label = document.createElement('label');
            sync_inputDom_label.for = `audio_sync${o}`;
            sync_inputDom_label.innerHTML = o;
            const sync_inputDom = document.createElement('input');
            sync_inputDom.type = 'radio';
            sync_inputDom.name = toCssClass(`audio_sync${propTitle}`);
            sync_inputDom.id = toCssClass(`audio_sync${propTitle}${o}`);
            sync_inputDom.value = o;
            // default select first option
            if (o === mappingOptions.sync) {
                sync_inputDom.checked = '1';
            }
            sync_inputDom_Cont.append(sync_inputDom_label);
            sync_inputDom_Cont.append(sync_inputDom);
            sync_titleDom_Cont.append(sync_inputDom_Cont);
            sync_Dom.append(sync_titleDom_Cont);
            // sync_Dom.append(sync_inputDom);
            sync_inputDom.addEventListener('change', updateMappingOptions);
        });
 
        audioOptions.append(sync_Dom);

        const fft_Dom = document.createElement('div');
        const fft_imgDom = document.createElement('canvas');
        const fft_selectDom = document.createElement('div');
        fft_Dom.style.position = 'relative';
        fft_Dom.style.top = '0px';
        fft_Dom.style.left = '0px';
        fft_imgDom.classList.add('audio_fft');
        fft_imgDom.classList.add(toCssClass(`audio_fft${propTitle}`));
        fft_imgDom.style.width = '100%';
        fft_imgDom.style.userDrag = 'none';
        fft_imgDom.style.userSelect = 'none';
        fft_imgDom.style.pointerEvents = 'none';
        fft_imgDom.setAttribute('width', config.audio.fftBandsUsed);
        fft_imgDom.setAttribute('height', config.audio.fftHeight);
        fft_selectDom.style.position = 'absolute';
        fft_selectDom.style.top = '0px';
        fft_selectDom.style.left = '0px';
        fft_selectDom.style.width = '100%';
        fft_selectDom.style.height = '100%';
        fft_selectDom.style.pointerEvents = 'none';
        fft_selectDom.style.backgroundColor = 'rgba(28, 186, 148,0.4)'; // AUDIO COLOR
        fft_selectDom.style.border = 'none'; // AUDIO COLOR

        fft_Dom.append(fft_imgDom);
        fft_Dom.append(fft_selectDom);
        audioOptions.append(fft_Dom);
        source_Dom.addEventListener('change', updateMappingOptions);
        muteDom.addEventListener('change', updateMappingOptions);
        min_inputDom.addEventListener('change', updateMappingOptions);
        max_inputDom.addEventListener('change', updateMappingOptions);
        smoothing_inputDom.addEventListener('change', updateMappingOptions);
        let setFrequency = false;
        let freq_down = 0;
        let freq_up = 0;
        let xy_start;
        fft_Dom.addEventListener('mousedown', (e) => {
            setFrequency = true;
            const bb = fft_imgDom.getBoundingClientRect();
            const x = e.clientX - bb.x;
            const y = e.clientY - bb.y;
            xy_start = {x, y};
        });
        fft_Dom.addEventListener('mousemove', (e) => {
            if (setFrequency) {
                const bb = fft_imgDom.getBoundingClientRect();
                const x_factor = config.audio.fftBandsUsed / bb.width;
                const y_factor = 256.0 / bb.height;
                const x = e.clientX - bb.x;
                const y = e.clientY - bb.y;
                let min_x, max_x, min_y, max_y;
                if (x > xy_start.x) {
                    min_x = xy_start.x;
                    max_x = x;
                } else {
                    min_x = x;
                    max_x = xy_start.x;
                }
                if (y > xy_start.y) {
                    min_y = xy_start.y;
                    max_y = y;
                } else {
                    min_y = y;
                    max_y = xy_start.y;
                }
                mappingOptions.min_freq = min_x * x_factor;
                mappingOptions.max_freq = max_x * x_factor;
                mappingOptions.min_in = (bb.height - max_y) * y_factor;
                mappingOptions.max_in = (bb.height - min_y) * y_factor;
            }
        });
        const unset = (e) => {
            setFrequency = false;
        };
        const unsetFromOutside = (e) => {
            document.removeEventListener('mouseup', unsetFromOutside);
            unset(e);
        };
        fft_Dom.addEventListener('mouseup', unset);
        fft_Dom.addEventListener('mouseleave', (e) => {
            if (setFrequency) {
                document.addEventListener('mouseup', unsetFromOutside);
            }
        });
        fft_Dom.addEventListener('mouseenter', (e) => {
            if (setFrequency) {
                document.removeEventListener('mouseup', unsetFromOutside);
            }
        });

        container.after(audioOptions);

        //canvass.push(fft_imgDom);
        canvasCombos[propTitle] = [fft_imgDom, fft_imgDom.getContext("2d"), layer.id()];
        updateMappingOptions();
        return audioOptions;
    };

    const addAudioOptions = (layer, propTitle) => {
        if (!started) {
            // audioOptions need a started init
            init();
        }
        const panelPropTitle = tp.getPanelPropTitle(propTitle);
        if (panelPropTitle === null) {
            console.log('Audio::addAudioOptions::error',`cannot find panelPropTitle "${propTitle}"`);
            return;
        }
        if (tp.getPanel().querySelector(toCssClass(`audioOptions${propTitle}`, '.')) !== null) {
            //console.log('Audio::addAudioOptions::error',`audioOptions already exist for "${propTitle}"`);
            return;
        }
        const container = panelPropTitle.parentNode.parentNode;

        if (propTitle === 'color' && config.audio.colorSeparateRGBA) {
            // NOTE: attach reversed, because container.after(audioOptions)
            createAudioOptions(layer, `${propTitle}.a`, container).classList.add(toCssClass(`audioOptions${propTitle}`));
            createAudioOptions(layer, `${propTitle}.b`, container).classList.add(toCssClass(`audioOptions${propTitle}`));
            createAudioOptions(layer, `${propTitle}.g`, container).classList.add(toCssClass(`audioOptions${propTitle}`));
            createAudioOptions(layer, `${propTitle}.r`, container).classList.add(toCssClass(`audioOptions${propTitle}`));
        } else {
            createAudioOptions(layer, propTitle, container);
        }

        const audioButton = container.querySelector('.audioButton');
        audioButton.classList.add('active');
    };

    const removeAudioOptions = (layer = false, propTitle = false) => {
        const panel = tp.getPanel();
        if (!layer && !propTitle) {
            const allAudioOptions = panel.querySelectorAll('.audioOptions');
            if (allAudioOptions !== null) {
                for (let i = 0; i < allAudioOptions.length; i++) {
                    allAudioOptions[i].remove();
                }
            }
            canvasCombos = {};
            panel.querySelectorAll('.audioButton').forEach((button) => {
                button.classList.remove('active');
            });
        } else {
            // only selected layers have options
            // otherwise the ui is not there
            if (layer.isSelected()) {
                if (config.audio.colorSeparateRGBA && propTitle === 'color') {
                    delete canvasCombos['color.r'];
                    delete canvasCombos['color.g'];
                    delete canvasCombos['color.b'];
                    delete canvasCombos['color.a'];
                } else {
                    delete canvasCombos[propTitle];
                }
                const audioOptions = panel.querySelectorAll(toCssClass(`audioOptions${propTitle}`,'.'));
                if (audioOptions.length > 0) {
                    audioOptions.forEach((e) => { e.remove(); });
                }
                const audioButton = panel.querySelector(toCssClass(`audioButton${propTitle}`,'.'));
                if (audioButton !== null) {
                    audioButton.classList.remove('active');
                }
            }
        }
    };

    const addAudioButton = (layer, propTitle, isActive) => {
        const panel = tp.getPanel();
        const panelPropTitle = tp.getPanelPropTitle(propTitle);
        if (panelPropTitle !== null) {
            //const container = tp.getPanelPropContainer(panelPropTitle);
            const container = panelPropTitle.parentNode.parentNode;

            if (container === null) {
                console.log("Audio::addAudioButton",
                    `impossible! cannot find panelPropContainer for ${propTitle}`);
            } else if (container.querySelector('.audioButton') !== null) {
                // this is super verbose, let's not log by default
                //console.log("Audio::addAudioButton",
                    //`already added an audio button for ${propTitle}`);
            } else {
                const button = document.createElement('div');
                button.classList.add('audioButton');
                button.classList.add(toCssClass(`audioButton${propTitle}`));
                button.innerHTML = `<img src="/web/assets/sound.svg" alt="audio" />`;
                container.append(button);
                button.addEventListener('click', () => {
                    if (!started) {
                        init();
                    }
                    if (!isMapped(layer, propTitle)) {
                        addAudioMapping(layer, propTitle);
                        addAudioOptions(layer, propTitle);
                        layer.updateValuesViaTheatre(false);
                    } else {
                        removeAudioMapping(layer, propTitle);
                        removeAudioOptions(layer, propTitle);
                        layer.updateValuesViaTheatre(true);
                    }
                });
                if (isActive) {
                    addAudioMapping(layer, propTitle);
                    addAudioOptions(layer, propTitle);
                }
            }
        } else {
            console.log("Audio::addAudioButton",
                `cannot find panelPropTitle for ${propTitle}`);
        }
    };

    const injectPanel = (layer) => {
        console.log('injecting panel');
        const flatValues = clone(layer.theatreObject.value);
        flattenObject(flatValues, ['color']);
        const layerType = layer.id().split('-')[0];
        const props = Object.keys(flatValues);
        props.forEach((propTitle) => {
        console.log('injecting prop', propTitle);
            if (config.audio.ignoreProps[layerType].indexOf(propTitle) < 0) {
                let isActive = false;
                if (mapping.hasOwnProperty(layer.id())) {
                    if (mapping[layer.id()].hasOwnProperty(propTitle)) {
                        isActive = true;
                    }
                }
                addAudioButton(layer, propTitle, isActive);
            }
        });
    };
    const audioSourceCombos = {};
    const readAudioFiles = () => {
        FS.readdir(config.fs.idbfsAudioDir).forEach((file) => {
            if (file.indexOf('.') !== 0 && !audioSourceCombos.hasOwnProperty(file)) {
                const audioElement = document.createElement('audio');
                audioElement.classList.add('invisible');
                audioElement.classList.add('audio_file');
                audioElement.classList.add(toCssClass(`audio_file${file}`));
                document.querySelector('body').append(audioElement);

                const arr = FS.readFile(`${config.fs.idbfsAudioDir}/${file}`);
                let type = 'audio/wav';
                const filesplit = file.split('.');
                const extension = filesplit[filesplit.length - 1];
                if (extension === 'wav') {
                    type = 'audio/wav';
                } else if (extension === 'mp3') {
                    type = 'audio/mpeg';
                } else if (extension === 'ogg') {
                    type = 'audio/ogg';
                }

                const src = URL.createObjectURL(
                    new Blob([arr], {
                        type
                    })
                );

                audioElement.src = src;
                audioElement.loop = true;

                const source = audioCtx.createMediaElementSource(audioElement);
                const gain = audioCtx.createGain();
                gain.gain.value = 0;
                source.connect(gain);
                gain.connect(audioCtx.destination);
                //source.connect(audioCtx.destination);
                const analyser = new AnalyserNode(audioCtx, config.audio.analyser);
                const bufferLength = analyser.frequencyBinCount / 2;
                const dataArray = new Uint8Array(bufferLength);
                
                source.connect(analyser);

                audioElement.play();

                audioSourceCombos[file] = {
                    gain,
                    source,
                    dataArray,
                    analyser,
                    audioElement,
                };
            }
        });
    };


    const init = () => {
        if (!started) {
            started = true;
            if (audioCtx !== false && audioCtx.state === 'suspended') {
                if (confirm('It looks as if your project has audio.'
                + 'Should we start audio now?'
                + 'It is possible that you get a request that Variable Time may use your microphone.'
                + 'Note: all data / microphone stream will stay on your device. If you don\'t believe us you can disconnect from the internet and it will still work. :-)')) {
                    audioCtx.resume();
                } else {
                    return;
                }
            }
            heading.textContent = "Voice-change-O-matic";
            //document.body.removeEventListener("click", init);

            // Older browsers might not implement mediaDevices at all, so we set an empty object first
            if (navigator.mediaDevices === undefined) {
                navigator.mediaDevices = {};
            }

            // Some browsers partially implement mediaDevices. We can't assign an object
            // with getUserMedia as it would overwrite existing properties.
            // Add the getUserMedia property if it's missing.
            if (navigator.mediaDevices.getUserMedia === undefined) {
                navigator.mediaDevices.getUserMedia = function(constraints) {
                    // First get ahold of the legacy getUserMedia, if present
                    const getUserMedia =
                        navigator.webkitGetUserMedia ||
                        navigator.mozGetUserMedia ||
                        navigator.msGetUserMedia;

                    // Some browsers just don't implement it - return a rejected promise with an error
                    // to keep a consistent interface
                    if (!getUserMedia) {
                        return Promise.reject(
                            new Error("getUserMedia is not implemented in this browser")
                        );
                    }

                    // Otherwise, wrap the call to the old navigator.getUserMedia with a Promise
                    return new Promise(function(resolve, reject) {
                        getUserMedia.call(navigator, constraints, resolve, reject);
                    });
                };
            }

            // Set up forked web audio context, for multiple browsers
            // window. is needed otherwise Safari explodes
            audioCtx = new(window.AudioContext || window.webkitAudioContext)();
            const voiceSelect = audioDom.querySelector("#voice");

            // Grab the mute button to use below
            const mute = audioDom.querySelector(".mute");

            // Set up the different audio nodes we will use for the app
            {
                const analyser = new AnalyserNode(audioCtx, config.audio.analyser);
                const bufferLength = analyser.frequencyBinCount / 2;

                audioSourceCombos['microphone'] = {
                    // source: see below when we actually get the microphone
                    analyser,
                    dataArray: new Uint8Array(bufferLength),
                    audioElement: null,
                };
            }

            readAudioFiles();

            //const distortion = audioCtx.createWaveShaper();
            //const gainNode = audioCtx.createGain();
            //const biquadFilter = audioCtx.createBiquadFilter();
            //const convolver = audioCtx.createConvolver();

            //const echoDelay = createEchoDelayEffect(audioCtx);

            // Distortion curve for the waveshaper, thanks to Kevin Ennis
            // http://stackoverflow.com/questions/22312841/waveshaper-node-in-webaudio-how-to-emulate-distortion
            const makeDistortionCurve = (amount) => {
                let k = typeof amount === "number" ? amount : 50,
                    n_samples = 44100,
                    curve = new Float32Array(n_samples),
                    deg = Math.PI / 180,
                    i = 0,
                    x;
                for (; i < n_samples; ++i) {
                    x = (i * 2) / n_samples - 1;
                    curve[i] = ((3 + k) * x * 20 * deg) / (Math.PI + k * Math.abs(x));
                }
                return curve;
            }

            // Set up canvas context for visualizer
            const canvas = audioDom.querySelector(".visualizer");
            const canvasCtx = canvas.getContext("2d");

            const intendedWidth = audioDom.clientWidth;
            canvas.setAttribute("width", config.audio.fftBandsUsed);
            const visualSelect = audioDom.querySelector("#visual");
            let drawVisual;
            let previousPosition = -1;

            // Main block for doing the audio recording
            if (navigator.mediaDevices.getUserMedia) {
                console.log("getUserMedia supported.");
                const constraints = {
                    audio: true
                };
                navigator.mediaDevices
                    .getUserMedia(constraints)
                    .then(function(stream) {
                        const source = audioCtx.createMediaStreamSource(stream);
                        const gain = audioCtx.createGain();
                        gain.gain.value = 0;
                        source.connect(gain);
                        gain.connect(audioCtx.destination);
                        source.connect(audioSourceCombos['microphone'].analyser);
                        audioSourceCombos['microphone'].source = source;
                        audioSourceCombos['microphone'].gain = gain;

                        visualize();
                    })
                    .catch(function(err) {
                        console.log("The following gUM error occured: " + err);
                    });
            } else {
                console.log("getUserMedia not supported on your browser!");
            }

            const visualize = () => {

                    //analyser.fftSize = config.audio.fftBandsAnalysed;
                    const w = config.audio.fftBandsUsed;
                    const h = config.audio.fftHeight;
                    const verticalFactor = h / 256.0;

                    // See comment above for Float32Array()
                    let canvasKeys = Object.keys(canvasCombos);

                    for (let i = 0; i < canvasKeys.length; i++) {
                        canvasCombos[canvasKeys[i]][1].clearRect(0, 0, w, h);
                    }

                    let frameCount = 0;
                    const drawAlt = function() {
                        const position = tp.sheet.sequence.position;
                        let positionRollover = false;
                        if (config.audio.rolloverResetLoop && position < previousPosition) {
                            positionRollover = true;
                        }
                        previousPosition = position;
                        canvasKeys = Object.keys(canvasCombos);
                        drawVisual = requestAnimationFrame(drawAlt);

                        canvasKeys.forEach((k) => {
                            canvasCombos[k][1].fillStyle = "rgb(0, 0, 0)"; // AUDIO COLOR
                            canvasCombos[k][1].fillRect(0, 0, w, h);
                            const layerID = canvasCombos[k][2];
                            const m = mapping[layerID][k];
                            if (m.sync === 'volume') {
                                const sx = m.min_freq;
                                const sw = m.max_freq - m.min_freq;
                                const sy = h - (m.max_in * verticalFactor);
                                const sh = (m.max_in - m.min_in) * verticalFactor;
                                canvasCombos[k][1].fillStyle = "rgb(80, 80, 80)"; // AUDIO COLOR
                                canvasCombos[k][1].fillRect(sx, sy, sw, sh);
                            } else if (m.sync === 'pitch' || m.sync === 'clarity') {
                                const sx = m.min_freq;
                                const sw = m.max_freq - m.min_freq;
                                const sy = 0;
                                const sh = h;
                                canvasCombos[k][1].fillStyle = "rgb(80, 80, 80)"; // AUDIO COLOR
                                canvasCombos[k][1].fillRect(sx, sy, sw, sh);
                            }
                        });

                        const usedSourceCombos = [];
                        const analysedResults = {};
                        const unmuted = [];
                        Object.keys(mapping).forEach((layerID) => {
                            Object.keys(mapping[layerID]).forEach((propTitle) => {
                                const m = mapping[layerID][propTitle];
                                const source = m.source;
                                if (!m.muted) {
                                    if (unmuted.indexOf(source) < 0) {
                                        unmuted.push(source);
                                    }
                                }
                                if (usedSourceCombos.indexOf(source) < 0) {
                                    usedSourceCombos.push(source);
                                    analysedResults[source] = {
                                        max_i: 0,
                                        max_ri: 0,
                                        max_v: 0,
                                        total_v: 0,
                                        mappings: [],
                                    };
                                }
                                m.max_v = 0;
                                m.max_i = 0;
                                m.max_ri = 0;
                                m.total_v = 0;
                                analysedResults[source].mappings.push(m);
                            });
                        });
                        Object.keys(audioSourceCombos).forEach((k) => {
                            const asc = audioSourceCombos[k];
                            if (asc.audioElement !== null) {
                                if (usedSourceCombos.indexOf(k) >= 0) {
                                    if (positionRollover || asc.audioElement.paused) {
                                        asc.audioElement.currentTime = position % asc.audioElement.duration;
                                        asc.audioElement.play();
                                    }
                                } else if (!asc.audioElement.paused) {
                                    asc.audioElement.pause();
                                }
                            }
                            if (unmuted.indexOf(k) < 0) {
                                asc.gain.gain.value = 0;
                            } else {
                                asc.gain.gain.value = 1;
                            }
                        });
                        usedSourceCombos.forEach((source) => {
                            const afs = audioSourceCombos[source];
                            const r = analysedResults[source];
                            afs.analyser.getByteFrequencyData(afs.dataArray);
                            for (let f = 0; f < w; f++) {
                                const v = afs.dataArray[f]; 
                                r.total_v += v;
                                if (r.max_v < v) {
                                    r.max_v = v;
                                    r.max_i = v;
                                }
                                r.max_ri += v * f;
                                let fillStyle = 'rgb(200,200,200)';
                                for (let k_i = 0; k_i < canvasKeys.length; k_i++) {
                                    // NOTE: this is not the most efficient way to do it
                                    const k = canvasKeys[k_i];
                                    const layerID = canvasCombos[k][2];
                                    if (mapping[layerID][k].source === source) {
                                        canvasCombos[k][1].fillStyle = fillStyle;
                                        canvasCombos[k][1].fillRect(
                                            f,
                                            h - (v * verticalFactor),
                                            1,
                                            (v * verticalFactor)
                                        );
                                    }
                                }
                                analysedResults[source].mappings.forEach((m) => {
                                    if (m.min_freq <= f && m.max_freq >= f) {
                                        m.total_v += v;
                                        if (m.max_v < v) {
                                            m.max_v = v;
                                            m.max_i = f;
                                        }
                                        m.max_ri += v * f;
                                    }
                                });
                            }
                            r.max_ri /= r.total_v;
                            analysedResults[source].mappings.forEach((m) => {
                                m.max_ri /= m.total_v;
                            });
                        });
                        for (let k_i = 0; k_i < canvasKeys.length; k_i++) {
                            const k = canvasKeys[k_i];
                            const layerID = canvasCombos[k][2];
                            const m = mapping[layerID][k];
                            if (m.sync === 'volume') {
                                const sx = m.min_freq;
                                const sw = m.max_freq - m.min_freq;
                                const sy = h - (m.max_in * verticalFactor);
                                const sh = (m.max_in - m.min_in) * verticalFactor;
                                canvasCombos[k][1].lineWidth = 1; // AUDIO COLOR
                                canvasCombos[k][1].strokeStyle = "rgb(255,255,255)"; // AUDIO COLOR
                                canvasCombos[k][1].strokeRect(sx, sy, sw, sh);
                            } else if (m.sync === 'pitch' || m.sync === 'clarity') {
                                const sx = m.min_freq;
                                const sw = m.max_freq - m.min_freq;
                                const sy = 0;
                                const sh = h;
                                canvasCombos[k][1].lineWidth = 1; // AUDIO COLOR
                                canvasCombos[k][1].strokeStyle = "rgb(255,255,255)"; // AUDIO COLOR
                                canvasCombos[k][1].strokeRect(sx, sy, sw, sh);
                            }
                        }

                        const propsToSet = [];
                        Object.keys(mapping).forEach((layerID) => {
                            Object.keys(mapping[layerID]).forEach((propTitle) => {
                                const m = mapping[layerID][propTitle];
                                switch (m.sync) {
                                    case 'volume': {
                                        let a = mapValue(m.max_v, m.min_in, m.max_in, m.min_out, m.max_out, true);
                                        m.value = m.value * m.smoothing + (1.0 - m.smoothing) * a;
                                        propsToSet.push({
                                            id: layerID,
                                            title: propTitle,
                                            value: m.value,
                                        });
                                        break;
                                    }
                                    case 'pitch': {
                                        const r = analysedResults[m.source];
                                        const mi = config.audio.ignoreOutboundFrequencies ? m.max_i : r.max_i;
                                        const ri = config.audio.ignoreOutboundFrequencies ? m.max_ri : r.max_ri;
                                        const fi = config.audio.pitchCombineFrequencies ? ri : mi;
                                        let a = mapValue(fi, m.min_freq, m.max_freq, m.min_out, m.max_out, true);
                                        if (!isNaN(a)) {
                                            m.value = m.value * m.smoothing + (1.0 - m.smoothing) * a;
                                            propsToSet.push({
                                                id: layerID,
                                                title: propTitle,
                                                value: m.value,
                                            });
                                        }
                                        break;
                                    }
                                    case 'clarity': {
                                        const clarity = m.max_v / m.total_v;
                                        const a = mapValue(clarity, 0.01, 0.05, m.min_out, m.max_out, true);
                                        if (!isNaN(a)) {
                                            m.value = m.value * m.smoothing + (1.0 - m.smoothing) * a;
                                            propsToSet.push({
                                                id: layerID,
                                                title: propTitle,
                                                value: m.value,
                                            });
                                        }
                                    }
                                    default:
                                        break;
                                }
                                if (m.letterDelay) {
                                    const pt = `letterDelays.${propTitle}`;
                                    propsToSet.push({
                                        id: layerID,
                                        title: pt,
                                        value: m.letterDelay,
                                    });
                                }
                            });
                        });
                        if (propsToSet.length > 0 && frameCount % 2 === 0) {
                            // this is when to monitor live
                            if (!record.isRecording()) {
                                //if (!tp.core.val(tp.sheet.sequence.pointer.playing)) {
                                    let values = {};
                                    propsToSet.forEach((p) => {
                                        const newValues = {
                                            [p.title]: p.value
                                        };
                                        if (!values.hasOwnProperty(p.id)) {
                                            values[p.id] = {};
                                        }
                                        values[p.id] = {
                                            ...values[p.id],
                                            ...newValues,
                                        };
                                    });
                                    Object.keys(values).forEach((layerID) => {
                                        deFlattenObject(values[layerID]);
                                        record.liveUpdater.immediateUpdate(getLayer(layerID), values[layerID]);
                                    });
                                //}
                            } else {
                                const position = tp.sheet.sequence.position;
                                propsToSet.forEach((p) => {
                                    const title = tp
                                        .getPanelPropTitle(p.title);
                                    const layer = getLayer(p.id);

                                    if (title !== null) {
                                        const inputElement = title
                                            .parentNode.parentNode
                                            .querySelector('input.recording');

                                        if (inputElement !== null) {
                                            inputElement.value = p.value;
                                            inputElement.dispatchEvent(new Event('change'));
                                        }
                                    }
                                    record.addValue(p.id, p.title, p.value, position);
                                    if (p.title.indexOf('color') === 0) {
                                        if (!config.audio.colorSeparateRGBA || p.title === 'color.a') {
                                            record.liveUpdate(layer, position);
                                        }
                                    } else {
                                        record.liveUpdate(layer, position);
                                    }
                                });
                            }
                        }
                        //const panel = tp.getPanel();
                        //const fft_images = panel.querySelectorAll('.audio_fft');
                        //if (fft_images !== null) {
                        //const src = canvas.toDataURL();
                        //fft_images.forEach((e) => {
                        //e.src = src;
                        //});
                        //}
                        frameCount++;
                    };
                    drawAlt();
            }
            if (audioCtx === false || audioCtx.state === 'suspended') {
                const notice = document.querySelector('#notice');
                const button = notice.querySelector('.button');
                const buttonP = button.querySelector('p');
                const whatP = notice.querySelector('.what p');
                const detailsP = notice.querySelector('.details p');
                button.classList.add('visible');
                notice.classList.add('visible');

                whatP.innerHTML = 'Start AudioContext';
                detailsP.innerHTML = 'This project has audio. For audio to be allowed to start, we need a user interaction.<br>You are the user. If you click the button below, you interacted with Variable Time, and we can start audio.<br>Also, if you have not previously allowed Variable Time to use the microphone, there might be another notification asking you for permission.<br>Sounds good?';
                buttonP.innerHTML = 'Yeah, absolutely, I love audio!';

                const alright = () => {
                    audioCtx.resume();
                    button.classList.remove('visible');
                    notice.classList.remove('visible');
                    detailsP.innerHTML = '';
                    whatP.innerHTML = '';
                    buttonP.innerHTML = 'OK';
                    button.removeEventListener('click', alright);
                };
                button.addEventListener('click', alright);
            }
        }
    }
    const deinit = () => {
        if (started) {
            if (audioCtx !== false) {
                audioCtx.suspend();
            }
            started = false;
        }
    };
    
    this.getContext = () => {
        return audioCtx;
    };
    this.init = init;
    this.deinit = deinit;
    this.injectPanel = injectPanel;
    this.getMapping = () => { return mapping; };
    this.getSavedMapping = () => { return savedMapping };
    this.setMapping = (m) => { mapping = m; };
    this.setSavedMapping = (m) => { savedMapping = m; };
    this.addAudioMapping = addAudioMapping;
    this.removeAudioMapping = removeAudioMapping;
    this.addAudioOptions = addAudioOptions;
    this.removeAudioOptions = removeAudioOptions;
    this.AudioMappingOptions = AudioMappingOptions;
    this.readAudioFiles = readAudioFiles;

    // debug
    this.canvasCombos = canvasCombos;
    this.audioSourceCombos = audioSourceCombos;
};

export {
    Audio
}