npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@jiaminghi/audio-fft

v0.0.0

Published

Audio frequency

Downloads

5

Readme

ENGLISH

这是一个基于Canvas进行实时音乐频谱绘制的插件。

插件将传入的audio实例作为音频来源进行快速傅里叶变换得到实时频谱数据,使用Canvas将其绘出,支持多种频谱模式,可以动态切换audio实例,支持渐变色。

npm安装

$ npm install @jiaminghi/audio-fft

使用

import AudioFFT from '@jiaminghi/audio-fft'

const canvas = document.getElementById('canvas')
const audio = document.getElementById('audio')

const fft = new AudioFFT(canvas, {
    // some config...
})
fft.setAudio(audio)
fft.draw()

Demo演示效果请移步Demo


/**
 * @description Class AudioFft
 * @param {Object} canvas Canvas 实例
 * @param {Object} config 配置项
 * @return {AudioFft} AudioFft实例
 */
export default class AudioFft {
    //...
}

配置项

analyserFFT

/**
 * @description Analyser fast fourier transform
 * @type {Number}
 * @default analyserFFT = 2048
 */

spring

/**
 * @description 弹簧模式
 * @type {Boolean}
 * @default spring = false
 */

wave

/**
 * @description 波浪模式
 * @type {Boolean}
 * @default wave = false
 */

symmetry

/**
 * @description 对称模式
 * @type {Boolean}
 * @default symmetry = false
 */

pick

/**
 * @description 是否显示拨片(非弹簧模式下有效)
 * @type {Boolean}
 * @default pick = true
 */

colorTransition

/**
 * @description 是否启用颜色渐变
 * @type {Boolean}
 * @default colorTransition = false
 */

colors

/**
 * @description 频谱颜色
 * @type {Array<String>}
 * @default colors = ['#6ed4d3', '#f5738f', '#4bb7e4']
 * @example colors = ['red', '#6ed4d3', 'rgb(100, 100, 100)', 'rgba(100, 100, 100, 1)']
 */

opacity

/**
 * @description 颜色透明度
 * @type {Number}
 * @default opacity = 1
 */

transitionFrame

/**
 * @description 颜色渐变过程帧数
 * @type {Number}
 * @default transitionFrame = 300
 */

columnGap

/**
 * @description 柱间间隙
 * @type {Number}
 * @default columnGap = 5
 */

columnWidth

/**
 * @description 柱宽度
 * @type {Number}
 * @default columnWidth = 10
 */

swingScale

/**
 * @description 频谱高度缩放比例
 * @type {Number}
 * @default swingScale = 1
 */

Tip

colors数组长度为1时,频谱单色绘制,长度大于1时,自动应用渐变色,启用colorTransition则会产生不一样的效果。

实例方法

setAudio

/**
 * @description 设置audio实例
 * @param audio Audio实例
 * @return {Undefined} Void
 */
AudioFFT.prototype.setAudio = function (audio) {
    // ...
}

draw

/**
 * @description 开始绘制
 * @return {Undefined} Void
 */
AudioFFT.prototype.draw = function () {
    // ...
}

stop

/**
 * @description 停止绘制
 * @return {Undefined} Void
 */
AudioFFT.prototype.stop = function () {
    // ...
}

updateConfig

/**
 * @description 更新配置项
 * @return {Undefined} Void
 */
AudioFFT.prototype.updateConfig = function (config = {}) {
    // ...
}

clear

/**
 * @description 清除Canvas
 * @return {Undefined} Void
 */
AudioFFT.prototype.clear = function () {
    // ...
}