添加监听视频卡顿的插件

packages/artplayer/src/plugins/networkMonitor.js

@@ -0,0 +1,43 @@
+export default function networkMonitor(art) {
+    let waitTime = 0;
+    let playTime = 0;
+    let lastTime = 0;
+    let timer = null;
+
+    function resetTime() {
+        waitTime = 0;
+        playTime = 0;
+        lastTime = 0;
+        cancelAnimationFrame(timer);
+        timer = null;
+    }
+
+    function calculatingTime() {
+        if (timer) return;
+        (function loop() {
+            if (art.isDestroy) return;
+            timer = requestAnimationFrame(() => {
+                const nowTime = Date.now();
+                if (lastTime) {
+                    const diffTime = nowTime - lastTime;
+                    playTime += diffTime;
+                    if (!art.player.playing) {
+                        waitTime += diffTime;
+                    }
+                }
+                lastTime = nowTime;
+                art.emit('networkMonitor', waitTime / playTime);
+                loop();
+            });
+        })();
+    }
+
+    art.on('play', calculatingTime);
+    art.on('pause', resetTime);
+
+    return {
+        name: 'networkMonitor',
+        reset: resetTime,
+        calculating: calculatingTime,
+    };
+}