How to use createLowpassFilter method in wpt

Best JavaScript code snippet using wpt

gesture-store.ts

Source:gesture-store.ts

1import { computed, observable, action } from "mobx";2import { Gesture, MotionReading, GestureExampleData, Match } from "./motion";3import { SingleDTWCore } from "./model";4import { serialData } from "./serial-data";5const READING_HISTORY_LIMIT = 30;6const createLowPassFilter = () => {7    const alpha = 0.5;8    let previousSmoothed = 0;9    return (value: number) => {10        const smoothed = alpha * value + (1 - alpha) * previousSmoothed;11        previousSmoothed = smoothed;12        return smoothed;13    }14}15export class GestureStore {16    // contains all of the gesture data17    @observable public gestures: Gesture[] = [];18    // is the Circuit Playground streaming accelerometer data or not19    @observable public connected: boolean;20    // needs saving21    @observable public hasBeenModified: boolean = false;22    @observable public readings: MotionReading[] = []; // 0 <= length < READING_HISTORY_LIMIT 23    @observable public latestTimestamp: number = 0;24    @observable public matches: Match[] = [];25    private models: SingleDTWCore[] = [];26    private idToType: pxt.Map<string> = {};27    private extId: string;28    private curGestureIndex: number = 0;29    public saveBlocks = debounce(() => this.saveBlocksNow(), 2000);30    constructor() {31        this.extId = window.location.hash.substr(1);32        console.log(`extension id: ${this.extId}`)33        window.addEventListener(34            "message",35            ev => ev.data.type == "pxtpkgext" ? this.receiveMessage(ev.data) : undefined,36            false);37        this.sendRequest("extinit");38        const filterX = createLowPassFilter();39        const filterY = createLowPassFilter();40        const filterZ = createLowPassFilter();41        serialData.register(data => {42            const accelX = filterX(data.accVec.accelX);43            const accelY = filterY(data.accVec.accelY);44            const accelZ = filterZ(data.accVec.accelZ);45            this.readings.push(new MotionReading(accelX, accelY, accelZ));46            this.latestTimestamp++;47            if (this.readings.length > READING_HISTORY_LIMIT) {48                this.readings.shift();49            }50            if (this.currentModel && this.currentModel.isRunning()) {51                let match = this.currentModel.feed(data.accVec);52                if (match) {53                    this.matches.push(match);54                }55            }56        });57    }58    public get readingLimit() { return READING_HISTORY_LIMIT; }59    @computed public get currentModel() {60        return this.models[this.curGestureIndex];61    }62    @computed public get currentGesture() {63        return this.gestures[this.curGestureIndex];64    }65    @computed public get currentOrientation() {66        return this.readings.length ?67            this.readings[this.readings.length - 1] :68            undefined;69    }70    public isMatch(readingIndex: number): boolean {71        const time = this.latestTimestamp - (this.readings.length - 1 - readingIndex);72        return this.matches.findIndex(m => m.startTime <= time && time <= m.endTime) >= 0;73    }74    @action public setCurrentGesture(gestureId: number): void {75        this.curGestureIndex = this.gestures.findIndex(g => g.gestureID === gestureId);76        this.currentModel.update(this.gestures[this.curGestureIndex].getCroppedData(), this.latestTimestamp);   77    }78    @action public deleteSample(gesture: Gesture, sample: GestureExampleData) {79        let cloneData = this.gestures.slice();80        const gi = this.gestures.indexOf(gesture);81        const si = this.gestures[gi].samples.indexOf(sample);82        cloneData[gi].samples.splice(si, 1);83        const model = this.models[gi];84        model.update(cloneData[gi].getCroppedData(), this.latestTimestamp);85        cloneData[gi].displayGesture = model.prototype;86        this.gestures = cloneData;87        this.markDirty();88    }89    @action public addSample(gesture: Gesture, newSample: GestureExampleData) {90        let cloneData = this.gestures.slice();91        const gestureIndex = this.gestures.indexOf(gesture);92        // do not change the order of the following lines:93        cloneData[gestureIndex].samples.unshift(newSample);94        gestureStore.currentModel.update(cloneData[gestureIndex].getCroppedData(), this.latestTimestamp);95        cloneData[gestureIndex].displayGesture = gestureStore.currentModel.prototype;96        this.gestures = cloneData;97        this.markDirty();98    }99    private receiveMessage(data: pxt.editor.ExtensionMessage) {100        const ev = data as pxt.editor.ExtensionEvent;101        if (ev.event) {102            switch (ev.event) {103                case "extconsole":104                    const cons = ev as pxt.editor.ConsoleEvent;105                    // drop sim106                    if (cons.body.sim) return;107                    this.onSerialData(cons.body.data);108                    break;109                case "extshown":110                    console.log('pxt-gestures shown')111                    this.connected = true;112                    this.sendRequest("extdatastream");113                    this.sendRequest("extreadcode")114                    break;115                case "exthidden":116                    console.log('pxt-gestures hidden')117                    this.connected = false;118                    break;119                default:120                    break;121            }122            return;123        }124        const action = this.idToType[data.id];125        console.log(`msg: ${action}`)126        delete this.idToType[data.id];127        switch (action) {128            case "extinit":129                this.sendRequest("extdatastream");130                this.sendRequest("extreadcode");131                break;132            case "extreadcode":133                // received existing code134                const usercode = data as pxt.editor.ReadCodeResponse;135                this.loadBlocks(usercode.resp.code, usercode.resp.json);136                break;137            default: break;138        }139    }140    private sendRequest(action: string, body?: any) {141        const id = Math.random().toString();142        this.idToType[id] = action;143        const msg = {144            type: "pxtpkgext",145            action: action,146            extId: this.extId,147            response: true,148            id: id,149            body150        };151        if (window.parent && window != window.parent)152            window.parent.postMessage(msg, "*");153    }154    /**155     * Initializes the serial port (using hid for the Circuit Playground) and sets the onSerialData event function156     * to update the realtime graph, feed the recorder, and feed the realtime DTW model (if it is running)157     */158    private onSerialData(strBuf: string) {159        const newData = parseString(strBuf);160        if (newData && newData.acc)161            serialData.notify(newData);162        this.connected = true;163    }164    /**165     * updates this.state.data[] array and the models[] array with a 166     * new Gesture and switches to the editGesture window167     */168    @action public addGesture() {169        this.gestures.push(new Gesture());170        // TODO: change this method of keeping the current gesture index to something more reliable171        this.curGestureIndex = this.gestures.length - 1;172        const model = new SingleDTWCore(this.gestures[this.curGestureIndex].gestureID + 1, this.gestures[this.curGestureIndex].name);173        this.models.push(model);174    }175    /**176     * will generate the code blocks for each running DTW model and will rewrite 177     * the contents of the custom.ts file with 178     */179    private saveBlocksNow() {180        if (!this.hasBeenModified) return;181        let cloneData = this.gestures.slice();182        const codeBlocks: string[] = this.models183            .filter(m => m.isRunning())184            .map(m => m.generateBlock());185        const code = SingleDTWCore.generateNamespace(codeBlocks);186        const json = JSON.stringify(this.gestures, null, 2);187        this.sendRequest("extwritecode", { code, json });188        this.hasBeenModified = false;189        this.gestures = cloneData; // FIXME: Why did Majeed do this?190    }191    markDirty() {192        if (!this.hasBeenModified) {193            this.hasBeenModified = true;194            this.saveBlocks();195        }196    }197    @action private loadBlocks(code: string, json: string) {198        if (!json) return;199        let jsonGestures: Gesture[] = JSON.parse(json);200        if (!jsonGestures) return;201        this.gestures = jsonGestures.map(importedGesture => 202            Gesture.parseGesture(importedGesture));203        this.models = this.gestures.map(gesture => {204            let model = new SingleDTWCore(gesture.gestureID + 1, gesture.name);205            model.update(gesture.getCroppedData(), this.latestTimestamp);206            return model;207        });208    }209    /**210     * Removes the currently active gesture if it contains no samples211     */212    @action public deleteIfGestureEmpty() {213        if (this.gestures.length > 0 && this.gestures[this.curGestureIndex].samples.length == 0) {214            // delete the gesture215            let cloneData = this.gestures.slice();216            cloneData.splice(this.curGestureIndex, 1);217            // delete the model218            this.models.splice(this.curGestureIndex, 1);219            this.gestures = cloneData;220        }221    }222    @action public deleteGesture(gesture: Gesture) {223        const index = this.gestures.indexOf(gesture);224        if (index >= 0) {225            this.gestures.splice(index, 1);226            this.models.splice(index, 1);227            this.markDirty();228        }229    }230}231// Returns a function, that, as long as it continues to be invoked, will not232// be triggered. The function will be called after it stops being called for233// N milliseconds. If `immediate` is passed, trigger the function on the234// leading edge, instead of the trailing.235function debounce(func: (...args: any[]) => any, wait: number, immediate?: boolean): any {236    let timeout: any;237    return function () {238        let context = this;239        let args = arguments;240        let later = function () {241            timeout = null;242            if (!immediate) func.apply(context, args);243        };244        let callNow = immediate && !timeout;245        clearTimeout(timeout);246        timeout = setTimeout(later, wait);247        if (callNow) func.apply(context, args);248    };249}250function parseString(strBuf: string): any {251    // populate members of newData (type: SensorData) with the values received from the device252    let strBufArray = strBuf.split(" ");253    let result = {254        acc: false, accVec: new MotionReading(0, 0, 0),255        /*mag: false, magVec: new Vector(0, 0, 0)*/256    };257    for (let i = 0; i < strBufArray.length; i++) {258        if (strBufArray[i] == "A") {259            result.accVec = new MotionReading(260                parseInt(strBufArray[i + 1]), 261                parseInt(strBufArray[i + 2]), 262                parseInt(strBufArray[i + 3]));263            result.acc = true;264            i += 3;265        }266    }267    return result;268}...

biquad-filters.js

Source:biquad-filters.js

...4//5// The formulas for the various filters were taken from6// http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt.7// Lowpass filter.8function createLowpassFilter(freq, q, gain) {9    var b0;10    var b1;11    var b2;12    var a0;13    var a1;14    var a2;15    if (freq == 1) {16        // The formula below works, except for roundoff.  When freq = 1,17        // the filter is just a wire, so hardwire the coefficients.18        b0 = 1;19        b1 = 0;20        b2 = 0;21        a0 = 1;22        a1 = 0;...

Using AI Code Generation

1var context = new wptAudioContext();2var filter = context.createLowpassFilter();3var context = new wptAudioContext();4var audioElement = document.getElementById("audio");5var source = context.createMediaElementSource(audioElement);6var context = new wptAudioContext();7var source = context.createMediaStreamSource(stream);8var context = new wptAudioContext();9var destination = context.createMediaStreamDestination();10var context = new wptAudioContext();11var oscillator = context.createOscillator();12var context = new wptAudioContext();13var real = new Float32Array(2);14var imag = new Float32Array(2);15var wave = context.createPeriodicWave(real, imag);16var context = new wptAudioContext();17var bufferSize = 1024;18var numberOfInputChannels = 2;19var numberOfOutputChannels = 2;20var scriptProcessor = context.createScriptProcessor(bufferSize, numberOfInputChannels, numberOfOutputChannels);21var context = new wptAudioContext();22var panner = context.createStereoPanner();23var context = new wptAudioContext();24var waveShaper = context.createWaveShaper();25var context = new wptAudioContext();26var audioData = new ArrayBuffer();27var successCallback = function(decodedData) {28};29var errorCallback = function() {30};

Using AI Code Generation

1var wpt = new webkitAudioContext();2var lowpassFilter = wpt.createLowpassFilter();3var wpt = new webkitAudioContext();4var biquadFilter = wpt.createBiquadFilter();5var wpt = new webkitAudioContext();6var delay = wpt.createDelay();7var wpt = new webkitAudioContext();8var scriptProcessor = wpt.createScriptProcessor();9var wpt = new webkitAudioContext();10var waveShaper = wpt.createWaveShaper();11var wpt = new webkitAudioContext();12var panner = wpt.createPanner();13var wpt = new webkitAudioContext();14var convolver = wpt.createConvolver();15var wpt = new webkitAudioContext();16var channelSplitter = wpt.createChannelSplitter();17var wpt = new webkitAudioContext();18var channelMerger = wpt.createChannelMerger();19var wpt = new webkitAudioContext();20var dynamicsCompressor = wpt.createDynamicsCompressor();21var wpt = new webkitAudioContext();22var oscillator = wpt.createOscillator();23var wpt = new webkitAudioContext();24var gain = wpt.createGain();25var wpt = new webkitAudioContext();26var analyser = wpt.createAnalyser();27var wpt = new webkitAudioContext();28var mediaElementSource = wpt.createMediaElementSource();29var wpt = new webkitAudioContext();30var mediaStreamSource = wpt.createMediaStreamSource();

Using AI Code Generation

1var wptools = require('webaudio-peaks');2var audioContext = new AudioContext();3var audioBuffer = audioContext.createBuffer(2, 44100, 44100);4var peaks = wptools.createLowpassFilter(audioBuffer, 2000);5var wptools = require('webaudio-peaks');6var audioContext = new AudioContext();7var audioBuffer = audioContext.createBuffer(2, 44100, 44100);8var peaks = wptools.createHighpassFilter(audioBuffer, 2000);9var wptools = require('webaudio-peaks');10var audioContext = new AudioContext();11var audioBuffer = audioContext.createBuffer(2, 44100, 44100);12var peaks = wptools.createBandpassFilter(audioBuffer, 2000, 4000);13var wptools = require('webaudio-peaks');14var audioContext = new AudioContext();15var audioBuffer = audioContext.createBuffer(2, 44100, 44100);16var peaks = wptools.createBandstopFilter(audioBuffer, 2000, 4000);17var wptools = require('webaudio-peaks');18var audioContext = new AudioContext();19var audioBuffer = audioContext.createBuffer(2, 44100, 44100);20var peaks = wptools.createAllpassFilter(audioBuffer, 2000);21var wptools = require('webaudio-peaks');22var audioContext = new AudioContext();23var audioBuffer = audioContext.createBuffer(2, 44100, 44100);24var peaks = wptools.createPeakingFilter(audioBuffer, 2000, 4000);25var wptools = require('webaudio-peaks');26var audioContext = new AudioContext();27var audioBuffer = audioContext.createBuffer(2, 44100, 44100);28var peaks = wptools.createLowshelfFilter(audioBuffer, 2000);

Using AI Code Generation

1var wpt = new WebAudioTestAPI();2var context = new wpt.AudioContext();3var filter = context.createLowpassFilter();4var filter2 = context.createLowpassFilter();5filter.connect(filter2);6filter.frequency.value = 5000;7filter2.frequency.value = 10000;8var wpt = new WebAudioTestAPI();9var context = new wpt.AudioContext();10var panner = context.createPanner();11panner.panningModel = "HRTF";12panner.distanceModel = "inverse";13panner.refDistance = 1;14panner.maxDistance = 10000;15panner.rolloffFactor = 1;16panner.coneInnerAngle = 360;17panner.coneOuterAngle = 0;18panner.coneOuterGain = 0;19panner.setOrientation(0, 0, 1);20panner.setPosition(0, 0, 0);21panner.setVelocity(0, 0, 0);22var wpt = new WebAudioTestAPI();23var context = new wpt.AudioContext();24var real = new Float32Array([0, 0, 1, 0, 0, 0, 0, 0, 0, 0]);25var imag = new Float32Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0]);26var wave = context.createPeriodicWave(real, imag);27var wpt = new WebAudioTestAPI();28var context = new wpt.AudioContext();29var panner = context.createStereoPanner();30panner.pan.value = 0;31var wpt = new WebAudioTestAPI();32var context = new wpt.AudioContext();33var shaper = context.createWaveShaper();34var curve = new Float32Array([0, 0, 1, 0, 0, 0, 0, 0, 0, 0]);35shaper.curve = curve;36shaper.oversample = 'none';

Using AI Code Generation

1var wptoolkit = require('wptoolkit');2var filter = wptoolkit.createLowpassFilter(1000, 0.707, 44100);3var wptoolkit = require('wptoolkit');4var context = wptoolkit.createAudioContext();5var filter = wptoolkit.createLowpassFilter(1000, 0.707, context);6var wptoolkit = require('wptoolkit');7var filter = wptoolkit.createHighpassFilter(1000, 0.707, 44100);8var wptoolkit = require('wptoolkit');9var context = wptoolkit.createAudioContext();10var filter = wptoolkit.createHighpassFilter(1000, 0.707, context);11var wptoolkit = require('wptoolkit');12var filter = wptoolkit.createBandpassFilter(1000, 0.707, 44100);13var wptoolkit = require('wptoolkit');14var context = wptoolkit.createAudioContext();15var filter = wptoolkit.createBandpassFilter(1000, 0.707, context);16var wptoolkit = require('wptoolkit');17var filter = wptoolkit.createBandstopFilter(1000, 0.707, 44100);18var wptoolkit = require('wptoolkit');19var context = wptoolkit.createAudioContext();20var filter = wptoolkit.createBandstopFilter(1000, 0.707, context);

Using AI Code Generation

1var wptoolkit = require('wptoolkit');2var lowpassFilter = wptoolkit.createLowpassFilter();3init()4init(sampleRate, cutoffFrequency)5var wptoolkit = require('wptoolkit');6var lowpassFilter = wptoolkit.createLowpassFilter();7lowpassFilter.init(100, 0.1);8filter()9filter(value)10var wptoolkit = require('wptoolkit');11var lowpassFilter = wptoolkit.createLowpassFilter();12lowpassFilter.init(100, 0.1);13var filteredValue = lowpassFilter.filter(5);14filterArray()15filterArray(valueArray)16var wptoolkit = require('wptoolkit');17var lowpassFilter = wptoolkit.createLowpassFilter();18lowpassFilter.init(100, 0.1);19var valueArray = [1, 2, 3, 4, 5];

Using AI Code Generation

1var lowPassFilter = new LowPassFilter(0.5);2var filteredValue = lowPassFilter.filter(1.0);3var highPassFilter = new HighPassFilter(0.5);4var filteredValue = highPassFilter.filter(1.0);5var bandPassFilter = new BandPassFilter(0.5,0.5);6var filteredValue = bandPassFilter.filter(1.0);7var lowShelfFilter = new LowShelfFilter(0.5,0.5);8var filteredValue = lowShelfFilter.filter(1.0);9var highShelfFilter = new HighShelfFilter(0.5,0.5);10var filteredValue = highShelfFilter.filter(1.0);11var peakingFilter = new PeakingFilter(0.5,0.5,0.5);12var filteredValue = peakingFilter.filter(1.0);13var notchFilter = new NotchFilter(0.5,0.5);14var filteredValue = notchFilter.filter(1.0);15var allPassFilter = new AllPassFilter(0.5);16var filteredValue = allPassFilter.filter(1.0);17var delay = new Delay(0.5);18var delayedValue = delay.delay(1.0);19var convolver = new Convolver();20var convolvedValue = convolver.convolve(1.0);21var gain = new Gain(0.5);22var gainValue = gain.gain(1.0);23var panner = new Panner(0.5,0.5);24var pannerValue = panner.panner(1.0);25var compressor = new Compressor(0.5

Using AI Code Generation

1var filter = wptools.createLowpassFilter( 100, 1000, 0.01, 0.1);2var filter = wptools.createHighpassFilter( 100, 1000, 0.01, 0.1);3var filter = wptools.createBandpassFilter( 100, 1000, 0.01, 0.1);4var filter = wptools.createBandstopFilter( 100, 1000, 0.01, 0.1);5var filter = wptools.createAllpassFilter( 100, 1000, 0.01, 0.1);6var filter = wptools.createPeakingFilter( 100, 1000, 0.01, 0.1);7var filter = wptools.createNotchFilter( 100, 1000, 0.01, 0.1);8var filter = wptools.createLowShelfFilter( 100, 1000, 0.01, 0.1);9var filter = wptools.createHighShelfFilter( 100, 1000, 0.01, 0.1);10var delayNode = wptools.createDelayNode( 0.5 );11var gainNode = wptools.createGainNode( 0.5 );12var pannerNode = wptools.createPannerNode( 0.5, 0.5, 0.5 );

Using AI Code Generation

1var wptools = require('wptools');2var wp = new wptools('en.wikipedia.org/wiki/Node.js');3wp.createLowpassFilter('Node.js', function(err, res){4  if (err) {5    console.log(err);6  } else {7    console.log(res);8  }9});10var wptools = require('wptools');11var wp = new wptools('en.wikipedia.org/wiki/Node.js');12wp.createHighpassFilter('Node.js', function(err, res){13  if (err) {14    console.log(err);15  } else {16    console.log(res);17  }18});19var wptools = require('wptools');20var wp = new wptools('en.wikipedia.org/wiki/Node.js');21wp.createBandpassFilter('Node.js', function(err, res){22  if (err) {23    console.log(err);24  } else {25    console.log(res);26  }27});28var wptools = require('wptools');29var wp = new wptools('en.wikipedia.org/wiki/Node.js');30wp.createBandstopFilter('Node.js', function(err, res){31  if (err) {32    console.log(err);33  } else {34    console.log(res);35  }36});37var wptools = require('wptools');38var wp = new wptools('en.wikipedia.org/wiki/Node.js');39wp.createPeakingFilter('Node.js', function(err, res){40  if (err) {41    console.log(err);42  } else {43    console.log(res);44  }45});46var wptools = require('wptools');47var wp = new wptools('en.wikipedia.org/wiki/Node.js');48wp.createAllpassFilter('Node.js', function(err, res){49  if (err) {50    console.log(err);51  } else {52    console.log(res);53  }54});

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