歌词同步加进度可控的canvas画布音频播放器

马黑黑 · 发表于 2022-8-26 20:24

请马上登录，朋友们都在花潮里等着你哦：）

您需要登录才可以下载或查看，没有账号？立即注册

x

本帖最后由马黑黑于 2022-8-26 20:27 编辑

马黑黑 · 发表于 2022-8-26 20:26

代码（不需要播放器边框时可去掉CSS里 #player 的 border 属性）：

<style>
#papa { left: -214px; width: 1024px; height: 640px; background: #ccc; box-shadow: 3px 3px 20px #000; position: relative; z-index: 1; }
#player { position: absolute; left: 10px; bottom: 10px; border: 1px solid; }
</style>
<div id="papa">
<canvas id="player"></canvas>
</div>
<script>
let ctx = player.getContext('2d'), w = player.width = 350, h = player.height = 100, btnFlag, lineFlag, aud = new Audio();
let mplayer = {
startX: 30, startY: 70, radius: 16, lineLen: 200, c_lrc: 'teal', c_time: 'teal', c_track: 'lightblue', c_prg: 'red', c_circle: 'lightblue', c_btn: 'snow', c_btnhover: 'pink',
drawLrc: function(text) {
ctx.clearRect(0, 0, w, 50);
ctx.fillStyle = this.c_lrc;
ctx.textAlign = 'center';
ctx.beginPath();
ctx.font = '1.2em sans-serif';
ctx.fillText(text, w/2, 30);
ctx.fill();
},
drawProgress: function(prog, text) {
ctx.clearRect(this.startX + this.radius, this.startY - 10, w - this.startX + this.radius, 40);
ctx.beginPath();
ctx.font = '14px sans-serif';
ctx.textBaseline = 'middle';
ctx.strokeStyle = this.c_track;
ctx.moveTo(this.startX + this.radius + 4, this.startY);
ctx.lineTo(this.startX + this.radius + 4 + this.lineLen, this.startY);
ctx.stroke();
ctx.beginPath();
ctx.strokeStyle = this.c_prg;
ctx.moveTo(this.startX + this.radius + 4, this.startY);
ctx.lineTo(this.startX + this.radius + 4 + prog, this.startY);
ctx.stroke();
ctx.fillStyle = this.c_time;
ctx.textAlign = 'left';
ctx.fillText(text, this.startX + this.radius + 8 + this.lineLen, this.startY);
ctx.fill();
},
drawBtn: function(id) {
ctx.clearRect(this.startX - this.radius, this.startY - this.radius, this.radius * 2, this.radius * 2);
ctx.fillStyle = this.c_circle;
ctx.beginPath();
ctx.arc(this.startX, this.startY, this.radius, 0, 2 * Math.PI);
ctx.fill();
ctx.fillStyle = btnFlag ? this.c_btnhover : this.c_btn;
ctx.beginPath();
if (id) {
ctx.moveTo(this.startX - this.radius / 2 + 1, this.startY - this.radius / 2);
ctx.lineTo(this.startX - this.radius / 2 + 1, this.startY + this.radius / 2);
ctx.lineTo(this.startX + this.radius / 2 + 1, this.startY);
ctx.fill();
} else {
ctx.fillRect(this.startX - this.radius / 2 + 5, this.startY - this.radius / 2, 2, this.radius);
ctx.fillRect(this.startX - this.radius / 2 + 10, this.startY - this.radius / 2, 2, this.radius);
}
},
setProgress: function() {
},
isBtnHover: function (x, y) {
return Math.pow(x - this.startX, 2) + Math.pow(y - this.startY, 2) <= Math.pow(this.radius, 2);
},
isLineHover: function(x, y) {
let xx = this.startX + this.radius + 4, yy = this.startY - 5;
return x >= xx && x <= xx + this.lineLen && y >= yy && y <= yy + 10;
},
};
let lrcAr = [
['0.01','童安格耶利亚女郎'],
['34.10','很远的地方有个女郎名字叫做耶利亚'],
['42.33','有人在传说她的眼睛看了使人更年轻'],
['50.62','如果你得到她的拥抱你就永远不会老'],
['59.15','为了这个神奇的传说我要努力去寻找'],
['66.42','耶利亚神秘耶利亚耶利耶利亚'],
['74.77','耶利亚神秘耶利亚我一定要找到她'],
['101.12','很远的地方有个女郎名字叫做耶利亚'],
['109.32','有人在传说她的眼睛看了使人更年轻'],
['117.90','如果你得到她的拥抱你就永远不会老'],
['126.22','为了这个神奇的传说我要努力去寻找'],
['133.57','耶利亚神秘耶利亚耶利耶利亚'],
['141.90','耶利亚神秘耶利亚我一定要找到她'],
['150.29','耶利亚神秘耶利亚耶利耶利亚'],
['158.76','耶利亚神秘耶利亚我一定要找到她'],
['198.70','耶利亚神秘耶利亚耶利耶利亚'],
['207.11','耶利亚神秘耶利亚我一定要找到她'],
['215.28','耶利亚神秘耶利亚耶利耶利亚'],
['223.72','耶利亚神秘耶利亚我一定要找到她']
];
aud.src = 'https://music.163.com/song/media/outer/url?id=150852.mp3';
aud.autoplay = true;
aud.loop = true;
mplayer.drawBtn(aud.paused);
mplayer.drawProgress(1, '00:00 | 00:00');
mplayer.drawLrc('等待播放 ...');
player.addEventListener('mousemove', (e) => {
btnFlag = mplayer.isBtnHover(e.offsetX, e.offsetY), lineFlag = mplayer.isLineHover(e.offsetX, e.offsetY);
player.style.cursor = btnFlag || lineFlag ? 'pointer' : 'default';
mplayer.drawBtn(aud.paused);
});
player.addEventListener('click', (e) => {
if(btnFlag) aud.paused ? aud.play() : aud.pause();
if(lineFlag) aud.currentTime = aud.duration * (e.offsetX - mplayer.startX - mplayer.radius - 4) / mplayer.lineLen;
});
aud.addEventListener('playing', () => mplayer.drawBtn(false));
aud.addEventListener('pause', () => mplayer.drawBtn(true));
aud.addEventListener('timeupdate', () => {
let prg = mplayer.lineLen * aud.currentTime / aud.duration, tMsg = toMin(aud.duration) + ' | ' + toMin(aud.currentTime);
mplayer.drawProgress(prg, tMsg);
for(j = 0; j < lrcAr.length; j ++) {
if(aud.currentTime >= lrcAr[j][0]) mplayer.drawLrc(lrcAr[j][1]);
}
});
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>