请跟我来

马黑黑 · 发表于 2022-9-17 07:47

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本帖最后由马黑黑于 2022-9-17 20:32 编辑

花潮论坛lrc在线

00:00 | 00:00

马黑黑 · 发表于 2022-9-17 07:47

本帖最后由马黑黑于 2022-9-17 20:34 编辑

代码

<style>
#papa { left: -214px; width: 1024px; height: 640px; background: #ccc url('https://638183.freep.cn/638183/t22/hl/b77.webp') no-repeat center/cover; box-shadow: 3px 3px 20px #000; display: grid; place-items: center; position: relative; z-index: 1; }
#mplayer { position: absolute; top: 140px; width: 300px; height: 80px; user-select: none; display: grid; place-items: center; cursor: pointer; }
#mplayer:hover #btnwrap, #mplayer:hover #prog { transform: translateY(var(--yy)); }
#mplayer:hover #btnwrap { background: linear-gradient(to top right, red, green); border-radius: 50%; opacity: .75; }
#btnwrap, #prog { position: absolute; display: grid; place-items: center;transition: .5s; }
#btnwrap { --yy: -15px; width: 40px; height: 40px; transform: rotate(45deg); border: 1px solid tan; border-radius: 6px; opacity: .25; }
#btnplay { width: 20px; height: 20px; background: #eee; clip-path: polygon(0 0, 0% 100%, 100% 50%); }
#btnpause { width: 2px; height: 20px; border-style: solid; border-width: 0px 4px; border-color: transparent #eee; display: none; }
#prog { --yy: 20px; width: 300px; height: 16px; border-radius: 10px; background: linear-gradient(90deg, orange, red 100%, transparent 0); border: 1px solid gray; font: normal 14px / 16px sans-serif; color: #1551C8; opacity: .75; }
#lrc { position: absolute; top: 100px; font: bold 2em sans-serif; color: transparent; letter-spacing: 2px; background: linear-gradient(-90deg, darkred, pink) 100% 100% / 200% 200%; background-clip: text; -webkit-background-clip: text; }
#mpic { position: absolute; width: 100%; height: 100%; mix-blend-mode: multiply; }
@keyframes bgMove1 { from { background-position: 0 0; } to { background-position: -100% 0; } }
@keyframes bgMove2 { from { background-position: 0 0; } to { background-position: -100% 0; } }
</style>
<div id="papa">
<img id="mpic" src="https://638183.freep.cn/638183/t22/hl/b77.png" alt="" />
<div id="lrc">花潮论坛lrc在线</div>
<div id="mplayer">
<div id="btnwrap"><span id="btnplay"></span><span id="btnpause"></span></div>
<div id="prog">00:00 | 00:00</div>
</div>
</div>
<script>
let lrcAr = [
['0.00','请跟我来',15.3],
['16.00','我踩着不变的步伐','6'],
['22.00','是为了配合你到来','5'],
['29.00','在慌张迟疑的时候','5.5'],
['35.00','请跟我来','6'],
['42.00','我带着梦幻的期待','5.6'],
['48.00','是无法按捺的情怀','5'],
['54.00','在你不注意的时候','6'],
['61.00','请跟我来','5'],
['70.00','别说什么','6'],
['76.00','那是你无法预知的世界','6'],
['84.00','别说你不用说','5.5'],
['89.00','你的眼睛已经告诉了我','6'],
['102.00','当春雨飘呀飘的飘在','6'],
['108.00','你滴也滴不完的发梢','6'],
['115.00','戴着你的水晶珠链','6.5'],
['121.00','请跟我来','7'],
['140.00','别说什么','7'],
['147.00','那是你无法预知的世界','8'],
['155.00','别说你不用说','5'],
['159.00','你的眼睛已经告诉了我','6'],
['172.00','当春雨飘呀飘的飘在','7'],
['179.00','你滴也滴不完的发梢','5'],
['185.00','戴着你的水晶珠链','6'],
['192.00','请跟我来','7']
];
let mKey = 0, mSeek = false, mFlag = true;
let aud = new Audio();
aud.src = 'https://music.163.com/song/media/outer/url?id=1444480110.mp3';
aud.autoplay = true;
aud.loop = true;
btnwrap.onclick = () => aud.paused ? aud.play() : aud.pause();
prog.onclick = (e) => aud.currentTime = aud.duration * e.offsetX / prog.offsetWidth;
aud.addEventListener('pause', () => mState());
aud.addEventListener('play', () => mState());
aud.addEventListener('seeked', () => calcKey());
aud.addEventListener('timeupdate', () => {
prog.style.background= 'linear-gradient(90deg, green, red ' + aud.currentTime / aud.duration * 100 + '%, snow 0)';
prog.innerText = toMin(aud.currentTime) + ' | ' + toMin(aud.duration);
for(j=0; j<lrcAr.length; j++) {
if(aud.currentTime >= lrcAr[j][0]) {
if(mKey === j) showLrc(lrcAr[j][2]);
else continue;
}
}
});
let mState = () => aud.paused ? (btnplay.style.display = 'block', btnpause.style.display = 'none', lrc.style.animationPlayState = 'paused') : (btnplay.style.display = 'none', btnpause.style.display = 'block', lrc.style.animationPlayState = 'running');
let showLrc = (time) => {
lrc.style.animation = (mFlag ? 'bgMove1 ' : 'bgMove2 ') + time + 's linear forwards';
lrc.innerHTML = lrcAr[mKey][1];
mKey += 1;
mFlag = !mFlag;
}
let calcKey = () => {
for(j = 0; j < lrcAr.length; j ++) {
if(aud.currentTime <= lrcAr[j][0]) {
mKey = j - 1;
break;
}
}
if(mKey <0) mKey = 0;
let mtime = lrcAr[mKey][2] - (aud.currentTime - lrcAr[mKey][0]);
showLrc(mtime);
}
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;
}
</script>

复制代码

马黑黑 · 发表于 2022-9-17 07:48

本帖最后由马黑黑于 2022-9-17 08:15 编辑

此帖测试播放进度可控的情况下模拟逐字lrc同步的效果。

歌词数组仍是二维数组，但每一句歌词“加餐”了（@小辣椒语）：

let lrcAr = [
      ['0.00','请跟我来',15.3],
      ['16.00','我踩着不变的步伐','6'],
      ['22.00','是为了配合你到来','5'],
      //…………
];

大家看，每一句歌词的后面，多了一个成员。多出的成员，可以直接写数字，也可以放在小角括号里（歌词前面的开始时间信息写法一样）。那么，这个新增的成员是啥？是当句歌词演唱用时，单位为秒。以上面的“我踩着不变的步伐”这句歌词为例，从唱”我“开始计时（16.00就是它），唱完”伐“字时终止计时，将audio所得秒数减去前面的 16.00，就得出本句歌词唱完的用时，6秒。可以是大概，不必非常精准，但也不能太离谱。

目前，这个“加餐”需要自己加，想要像本帖一样效果的，辛苦一下。

马黑黑 · 发表于 2022-9-17 07:48

本帖最后由马黑黑于 2022-9-17 08:13 编辑

本测试帖的歌谱是用一张图片贴上去，歌谱图片背景纯白，用混合滤镜将其融合到帖子背景。CSS代码是下句：

#mpic { position: absolute; width: 100%; height: 100%; mix-blend-mode: multiply; }

对应的HTML（即 id="mpic" 那句）就能渲染出融合效果。也可以将图片作为背景图片一同添加进去，使用 background-blend-mode 设置融合模式。