tcplayer 源码改造第二弹 -> 加入倍速播放

前序

简介

  • 主要介绍了基于tcplayer的源码改造,加入倍速播放功能
  • 不涉及tcplayer的使用以及框架如何调用,详情请看腾讯云点播文档
  • **源码解析中有些注释是笔者加的,如需定位,请不要复制注释**
  • **以下示例的代码为重新混淆压缩过,可能与原来的tcplayer.js函数名不同,不可直接复制使用,请务必跟着笔者一步步执行**

人群

  • 不想自己写播放器而使用tcplayer,但是又受限于播放器本身不带有倍速播放功能的开发人员
  • 不适合没有任何前端基础的小白,请谨慎观看

git地址

源码改造(各位客官请自行格式化代码)

实现倍速切换的函数

添加配置参数

在代码中定位videoSource,在第一个的位置,即初始化赋值的同层如下参数(带有注释的则是笔者加入的参数)

      function t(i, o) {

        n(this, t);

        var s = l(o);

        M = ["od", "hd", "sd"];

        var a = {

          owner: i,

          videoSource: s,

          src: s.curUrl,

          autoplay: o.autoplay,

          live: o.live,

          flash: o.flash,

          flashUrl: o.flashUrl,

          poster: o.poster,

          width: o.width,

          height: o.height,

          volume: o.volume,

          listener: o.listener,

          wording: o.wording,

          controls: o.controls,

          clarity: o.clarity,

          clarityLabel: o.clarityLabel,

          showLoading: "boolean" != typeof o.showLoading || o.showLoading,

          pausePosterEnabled: void 0 === o.pausePosterEnabled || o.pausePosterEnabled,

          fullscreenEnabled: void 0 === o.fuScrnEnabled || o.fuScrnEnabled,

          systemFullscreen: o.systemFullscreen || !1,

          hls: o.hls || "0.12.4",

          h5\_flv: o.h5\_flv,

          x5\_player: o.x5\_player !== !1,

          x5\_type: o.x5\_type,

          x5\_fullscreen: o.x5\_fullscreen,

          x5\_orientation: o.x5\_orientation,

          x5\_playsinline: o.x5\_playsinline,

          preload: o.preload || "auto",

          hlsConfig: o.hlsConfig,

          flvConfig: o.flvConfig,

          // curRate表示当前倍速

          curRate: o.curRate ? o.curRate : 1,

          // rates表示倍速数组

          rates: o.rates ? o.rates : [2, 1.75, 1.5, 1.25, 1.0, 0.75, 0.5]

        };

        return r(this, e.call(this, a))

      }

添加获取当前倍速的方法

定位"currentTime",可以看到如下代码:

      }, e.prototype.currentTime = function (e) {

        return this.video.currentTime(e)

      }

由腾讯视频的官方文档可以知道,currentTime方法是暴露给用户,用于获取/设置当前时间的方法,同理,加入获取当前倍速的方法currentRate:

      }, e.prototype.currentTime = function (e) {

        return this.video.currentTime(e)

      }, e.prototype.currentRate = function (e) {

        return this.video.options.curRate;

      }

添加切换倍速的函数

定位_switchClarity,找到放置该函数的位置,并加入_switchRate函数:

return s(t, e), t.prototype.\_switchClarity = function (e) {

        e = e || "od";

        var t = this.currentTime(), i = this.options.videoSource, o = c(i.urls, e), n = this.playing();

        this.load(o.url), i.curUrl = o.url, i.curDef = o.definition, i.curFormat = o.format;

        var r = A.bind(this, function () {

          parseInt(this.duration() - t) > 0 && !this.options.live && this.currentTime(t), n && this.play(!0), m.unsub(w.MetaLoaded, "\*", r, this)

        });

        m.sub(w.MetaLoaded, "\*", r, this);

        // 切换清晰度后依旧保持原有的倍速

        document.querySelector("video").playbackRate = this.options.curRate;

      }, t.prototype.\_switchRate = function (e) {

        // 自定义的切换倍速的函数

        e = e || 1;

        this.options.curRate = e;

        document.querySelector("video").playbackRate = e;

      }, t.prototype.switchClarity = function (e) {

        this.claritySwitcher ? this.claritySwitcher.setClarity(e) : this.\_switchClarity(e)

      }, t.prototype.handleMsg = function (t) {

        e.prototype.handleMsg.call(this, t)

      }, t

参照切换清晰度的代码对控制栏加入倍速播放的节点

复制切换清晰度的代码,并修改点击函数

考虑到倍速播放的样式与切换清晰度类似(其实就是一样啦),可以定位到切换清晰度的代码,进行复制黏贴.

在chrome中打开开发者工具,定位到视频下方的控制栏中清晰度,可以找到对应的节点vcp-clarityswitcher.

视频下方控制栏清晰度的节点

在代码中搜索"vcp-clarityswitcher",会搜索到一些样式和实际添加节点的代码,如下:

        return a(t, e), t.prototype.render = function (t) {

          this.show = !1, this.createEl("div", {"class": "vcp-clarityswitcher"}), this.current = p.createEl("a", {"class": "vcp-vertical-switcher-current"}), this.container = p.createEl("div", {"class": "vcp-vertical-switcher-container"}), this.items = [], this.currentItem = "";

          var i = this.options.videoSource;

          this.current.innerHTML = f[i.curDef], this.el.appendChild(this.current);

          for (var o = 0; o < i.definitions.length; o++) {

            var n = p.createEl("a", {"class": "vcp-vertical-switcher-item"});

            n.innerHTML = f[i.definitions[o]], i.definitions[o] == i.curDef && (p.addClass(n, "current"), this.currentItem = n), n.setAttribute("data-def", i.definitions[o]), this.items.push(n), this.container.appendChild(n)

          }

          return this.el.appendChild(this.container), e.prototype.render.call(this, t)

        }

复制整个function,如下是整个function:

, function (e, t, i) {

    "use strict";



    function o(e) {

      if (e && e.\_\_esModule) return e;

      var t = {};

      if (null != e) for (var i in e) Object.prototype.hasOwnProperty.call(e, i) && (t[i] = e[i]);

      return t["default"] = e, t

    }



    function n(e) {

      return e && e.\_\_esModule ? e : {"default": e}

    }



    function r(e, t) {

      if (!(e instanceof t)) throw new TypeError("Cannot call a class as a function")

    }



    function s(e, t) {

      if (!e) throw new ReferenceError("this hasn't been initialised - super() hasn't been called");

      return !t || "object" != typeof t && "function" != typeof t ? e : t

    }



    function a(e, t) {

      if ("function" != typeof t && null !== t) throw new TypeError("Super expression must either be null or a function, not " + typeof t);

      e.prototype = Object.create(t && t.prototype, {

        constructor: {

          value: e,

          enumerable: !1,

          writable: !0,

          configurable: !0

        }

      }), t && (Object.setPrototypeOf ? Object.setPrototypeOf(e, t) : e.\_\_proto\_\_ = t)

    }



    t.\_\_esModule = !0;

    var l = i(24), c = n(l), u = i(2), p = o(u), h = i(3), d = o(h), f = {od: "超清", hd: "高清", sd: "标清"},

      y = function (e) {

        function t(i) {

          r(this, t);

          var o = s(this, e.call(this, i, "ClaritySwitcher"));

          return f = d.extend({}, i.options.clarityLabel, f), i.claritySwitcher = o, o

        }



        return a(t, e), t.prototype.render = function (t) {

          this.show = !1, this.createEl("div", {"class": "vcp-clarityswitcher"}), this.current = p.createEl("a", {"class": "vcp-vertical-switcher-current"}), this.container = p.createEl("div", {"class": "vcp-vertical-switcher-container"}), this.items = [], this.currentItem = "";

          var i = this.options.videoSource;

          this.current.innerHTML = f[i.curDef], this.el.appendChild(this.current);

          for (var o = 0; o < i.definitions.length; o++) {

            var n = p.createEl("a", {"class": "vcp-vertical-switcher-item"});

            n.innerHTML = f[i.definitions[o]], i.definitions[o] == i.curDef && (p.addClass(n, "current"), this.currentItem = n), n.setAttribute("data-def", i.definitions[o]), this.items.push(n), this.container.appendChild(n)

          }

          return this.el.appendChild(this.container), e.prototype.render.call(this, t)

        }, t.prototype.setup = function () {

          this.on("click", this.onClick), this.on("mouseenter", this.onMouseEnter), this.on("mouseleave", this.onMouseLeave)

        }, t.prototype.onClick = function (e) {

          var t = e.target.getAttribute("data-def");

          t ? (this.current.innerHTML = f[t], p.removeClass(this.currentItem, "current"), p.addClass(e.target, "current"), this.currentItem = e.target, this.player.\_switchClarity(t)) : !this.show

        }, t.prototype.onMouseLeave = function () {

          this.container.style.display = "none", this.show = !1

        }, t.prototype.onMouseEnter = function () {

          this.container.style.display = "block", this.show = !0

        }, t.prototype.setClarity = function (e) {

          e && (this.current.innerHTML = f[e], p.removeClass(document.querySelector(".vcp-vertical-switcher-item.current"), "current"), p.addClass(document.querySelector('.vcp-vertical-switcher-item[data-def="' + e + '"]'), "current"), this.currentItem = document.querySelector('.vcp-vertical-switcher-item[data-def="' + e + '"]'), this.player.\_switchClarity(e))

        }, t

      }(c["default"]);

    t["default"] = y

  }

黏贴到同层级的最下方,代码拉到最下方,在下图鼠标光标所在位置黏贴:

同层级最下方

再改动绑定的数据

// 删除了原有的f这个数组

    var l = i(24), c = n(l), u = i(2), p = o(u), h = i(3), d = o(h),

      y = function (e) {

        function t(i) {

          return r(this, t), s(this, e.call(this, i, "ClaritySwitcher"))

        }



        return a(t, e), t.prototype.render = function (t) {

          this.show = !1, this.createEl("div", {"class": "vcp-clarityswitcher"}), this.current = p.createEl("a", {"class": "vcp-vertical-switcher-current"}), this.container = p.createEl("div", {"class": "vcp-vertical-switcher-container"}), this.items = [], this.currentItem = "";

          // curRate为配置中的当前倍速 rates为倍速数组

          var i = this.options.curRate, f = this.options.rates;

          this.current.innerHTML = f[i], this.el.appendChild(this.current);

          for (var o = 0; o < f.length; o++) {

            var n = p.createEl("a", {"class": "vcp-vertical-switcher-item"});

            n.innerHTML = f[o], f[o] == i && (p.addClass(n, "current"), this.currentItem = n), n.setAttribute("data-def", o), this.items.push(n), this.container.appendChild(n)

          }

          return this.el.appendChild(this.container), e.prototype.render.call(this, t)

        }, t.prototype.setup = function () {

          // 在初始化时加入修改倍速函数\_switchRate,切换到当前倍速

          this.player.\_switchRate(this.options.curRate), this.on("click", this.onClick), this.on("mouseenter", this.onMouseEnter), this.on("mouseleave", this.onMouseLeave)

        }, t.prototype.onClick = function (e) {

          var t = e.target.getAttribute("data-def"),f = this.options.rates;

          // 修改点击函数,将\_switchClarity改为自定义的\_switchRate

          t ? (this.current.innerHTML = f[t], p.removeClass(this.currentItem, "current"), p.addClass(e.target, "current"), this.currentItem = e.target, this.player.\_switchRate(f[t])) : !this.show

        }, t.prototype.onMouseLeave = function () {

          this.container.style.display = "none", this.show = !1

        }, t.prototype.onMouseEnter = function () {

          this.container.style.display = "block", this.show = !0

        }

        // 去除了无效的setClarity函数,也可不去,对功能无影响,只是代码洁癖

        , t

      }

加入倍速按钮

在chrome中打开开发者工具,定位到视频下方的控制栏,可以找到对应的节点"vcp-controls-panel".

视频下方控制栏的节点

在代码中搜索"vcp-controls-panel",会搜索到一些样式和实际添加节点的代码,如下:

    t.\_\_esModule = !0;

    var l = i(24), c = n(l), u = i(28), p = n(u), h = i(29), d = n(h), f = i(30), y = i(31), A = n(y), v = i(32),

      m = n(v), g = i(33), w = n(g), b = i(34), M = n(b), I = i(4), S = i(2), E = o(S), \_ = i(3), T = o(\_), D = i(1),

      L = o(D), O = function (e) {

        function t(i) {

          return r(this, t), s(this, e.call(this, i, "Panel"))

        }



        return a(t, e), t.prototype.render = function (t) {

          return this.createEl("div", {"class": "vcp-controls-panel"}), this.el.appendChild(E.createEl("div", {"class": "vcp-panel-bg"})), this.playToggle = new p["default"](this.player), this.playToggle.render(this.el), this.timelabel = new m["default"](this.player), this.timelabel.render(this.el), this.timeline = new A["default"](this.player), this.timeline.render(this.el), this.options.fullscreenEnabled === !0 && (this.fullscreen = new d["default"](this.player), this.fullscreen.render(this.el)), L.IS\_MOBILE || (this.volume = new w["default"](this.player), this.volume.render(this.el)), this.options.videoSource && this.options.videoSource.definitions.length > 1 && !L.IS\_MOBILE && (this.claritySwitcher = new M["default"](this.player), this.claritySwitcher.render(this.el)), e.prototype.render.call(this, t)

        }

将其改为:

    t.\_\_esModule = !0;

    // i为对应的esmodule,M["default"]表示n[i(34)]个,即分辨率是第34个function,相应的,我们将倍速的放在最后,就是第40个

    var l = i(24), c = n(l), u = i(28), p = n(u), h = i(29), d = n(h), f = i(30), y = i(31), A = n(y), v = i(32),

      m = n(v), g = i(33), w = n(g), b = i(34), M = n(b), I = i(4), S = i(2), E = o(S), \_ = i(3), T = o(\_), D = i(1),

      L = o(D), rate = i(40), Rate = n(rate), O = function (e) {

        function t(i) {

          return r(this, t), s(this, e.call(this, i, "Panel"))

        }



        return a(t, e), t.prototype.render = function (t) {

          // 加入倍速节点,由于现有的手机浏览器都支持倍速,所以去掉了手机端判断

          return this.createEl("div", {"class": "vcp-controls-panel"}), this.el.appendChild(E.createEl("div", {"class": "vcp-panel-bg"})), this.playToggle = new p["default"](this.player), this.playToggle.render(this.el), this.timelabel = new m["default"](this.player), this.timelabel.render(this.el), this.timeline = new A["default"](this.player), this.timeline.render(this.el), this.options.fullscreenEnabled === !0 && (this.fullscreen = new d["default"](this.player), this.fullscreen.render(this.el)), L.IS\_MOBILE || (this.volume = new w["default"](this.player), this.volume.render(this.el)), this.options.videoSource && this.options.videoSource.definitions.length > 1 && (this.claritySwitcher = new M["default"](this.player), this.claritySwitcher.render(this.el)) && (this.rateSwitcher = new Rate["default"](this.player), this.rateSwitcher.render(this.el)), e.prototype.render.call(this, t)

        }

使用说明

使用时请先压缩js文件

参数说明

在原有播放器支持的参数下添加了两个参数

参数 | 类型 | 默认值 | 参数说明

:-: | :-: | :-: | :-:

rates | Array | 2, 1.75, 1.5, 1.25, 1, 0.75, 0.5 | 倍速数组

curRate | Number | 1 | 默认倍速

增加方法&说明

方法 | 参数 | 返回值 | 说明 | 示例

:-: | :-: | :-: | :-: | :-:

currentRate() | 无 | {int} | 获取当前的倍速 | player.currentRate()

使用示例

var player = new TcPlayer('id\_test\_video', {

    "m3u8": "http://2157.liveplay.myqcloud.com/2157\_358535a.m3u8", //请替换成实际可用的播放地址

    "autoplay" : true,      //iOS 下 safari 浏览器,以及大部分移动端浏览器是不开放视频自动播放这个能力的

    "poster" : "http://www.test.com/myimage.jpg",

    "width" :  '480',//视频的显示宽度,请尽量使用视频分辨率宽度

    "height" : '320'//视频的显示高度,请尽量使用视频分辨率高度

    "rates": [2, 1.5, 1, 0.5],

    "curRate": '1'

});

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如有侵权,请联系 yunjia_community@tencent.com 删除。

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