fix: 统一弹幕时间计算方式，speed改为duration

lib/pages/danmaku/view.dart

@@ -34,7 +34,7 @@ class _PlDanmakuState extends State<PlDanmaku> {
   late double showArea;
   late double opacityVal;
   late double fontSizeVal;
-  late double danmakuSpeedVal;
+  late double danmakuDurationVal;
 
   @override
   void initState() {
@@ -68,7 +68,7 @@ class _PlDanmakuState extends State<PlDanmaku> {
     showArea = playerController.showArea;
     opacityVal = playerController.opacityVal;
     fontSizeVal = playerController.fontSizeVal;
-    danmakuSpeedVal = playerController.danmakuSpeedVal;
+    danmakuDurationVal = playerController.danmakuDurationVal;
   }
 
   // 播放器状态监听
@@ -156,7 +156,7 @@ class _PlDanmakuState extends State<PlDanmaku> {
   @override
   Widget build(BuildContext context) {
     return LayoutBuilder(builder: (context, box) {
-      double initDuration = box.maxWidth / 12;
+      // double initDuration = box.maxWidth / 12;
       return Obx(
         () => AnimatedOpacity(
           opacity: playerController.isOpenDanmu.value ? 1 : 0,
@@ -172,8 +172,9 @@ class _PlDanmakuState extends State<PlDanmaku> {
               hideTop: blockTypes.contains(5),
               hideScroll: blockTypes.contains(2),
               hideBottom: blockTypes.contains(4),
-              duration: initDuration /
-                  (danmakuSpeedVal * widget.playerController.playbackSpeed),
+              duration: danmakuDurationVal / widget.playerController.playbackSpeed,
+              // initDuration /
+              //     (danmakuSpeedVal * widget.playerController.playbackSpeed),
             ),
             statusChanged: (isPlaying) {},
           ),

lib/pages/video/detail/widgets/header_control.dart

@@ -585,7 +585,7 @@ class _HeaderControlState extends State<HeaderControl> {
     // 字体大小
     double fontSizeVal = widget.controller!.fontSizeVal;
     // 弹幕速度
-    double danmakuSpeedVal = widget.controller!.danmakuSpeedVal;
+    double danmakuDurationVal = widget.controller!.danmakuDurationVal;
 
     DanmakuController danmakuController = widget.controller!.danmakuController!;
     await showModalBottomSheet(
@@ -755,7 +755,7 @@ class _HeaderControlState extends State<HeaderControl> {
                       ),
                     ),
                   ),
-                  Text('弹幕时长 ${danmakuSpeedVal.toString()}'),
+                  Text('弹幕时长 ${danmakuDurationVal.toString()}'),
                   Padding(
                     padding: const EdgeInsets.only(
                       top: 0,
@@ -773,14 +773,14 @@ class _HeaderControlState extends State<HeaderControl> {
                             enabledThumbRadius: 6.0),
                       ),
                       child: Slider(
-                        min: 1,
-                        max: 8,
-                        value: danmakuSpeedVal,
-                        divisions: 14,
-                        label: danmakuSpeedVal.toString(),
+                        min: 2,
+                        max: 16,
+                        value: danmakuDurationVal,
+                        divisions: 28,
+                        label: danmakuDurationVal.toString(),
                         onChanged: (double val) {
-                          danmakuSpeedVal = val;
-                          widget.controller!.danmakuSpeedVal = danmakuSpeedVal;
+                          danmakuDurationVal = val;
+                          widget.controller!.danmakuDurationVal = danmakuDurationVal;
                           setState(() {});
                           try {
                             DanmakuOption currentOption =