测试：圆内频谱播放器

马黑黑 · 发表于 2022-12-7 19:27

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先贴代码

<style>
#papa { margin: auto; width: 1024px; height: 640px; background: gray; box-shadow: 3px 3px 20px #000; position: relative; z-index: 1; }
#mplayer { position: absolute; bottom: 20px; left: calc(50% - 60px); width: 120px; height: 120px; border-radius: 50%; border: 6px solid darkgreen; display: grid; place-items: center center; user-select: none; cursor: pointer; }
#tmsg { font: normal 14px sans-serif; color: snow; z-index: 450; }
.mline { --hh: 0px; position: absolute; width: 2px; height: 6px; background: green; }
.mline::before {position: absolute;content: '';width: 100%;height: var(--hh);bottom: 0;left: 0;background: linear-gradient(to top, green, lightgreen); }
</style>
<div id="papa">
<div id="mplayer"><span id="tmsg">play</span></div>
<audio id="aud" src="https://music.163.com/song/media/outer/url?id=28221434.mp3" autoplay loop></audio>
</div>
<script>
let ppsize = 4, gap = 2; /* 频谱条宽度和间距 */
let total = Math.floor(mplayer.clientWidth * Math.PI / (ppsize + gap)); /* 频谱总数 */
//创建频谱
for(j=0; j< total; j++) {
let ele = document.createElement('span');
ele.className = 'mline';
ele.style.width = ppsize + 'px';
ele.style.transform = `rotate(${j*360/total}deg) translateY(60px)`; /* 分布频谱 */
mplayer.appendChild(ele);
}
let lines = document.querySelectorAll('.mline'); /* 频谱操作句柄 */
/* 频谱变换 : 伪元素加长 */
let update = () => {
/* 遍历频谱元素并改变其高度值 */
lines.forEach((item) => item.style.setProperty('--hh',Math.random() * 60 + 'px'));
/* 播放器不是停止状态下请求下一帧 */
if(!aud.paused) window.requestAnimationFrame(update);
};
/* 格式化输出时间 */
let toMin = (val) => {if (!val) return '00:00';val = Math.floor(val);let min = parseInt(val / 60),sec = parseFloat(val % 60);if (min < 10) min = '0' + min;if (sec < 10) sec = '0' + sec;return min + ':' + sec;}
/* 播放器单击事件 */
mplayer.onclick = () => aud.paused ? aud.play() : aud.pause();
/* audio 监听事件 */
aud.addEventListener('timeupdate', () => {
update(); /* 运行频谱变化函数 */
tmsg.innerText = '-' + toMin(aud.duration - aud.currentTime); /* 输出时间信息 */
});
</script>