feat: 调整设置，支持导入导出，代码优化

lib/pages/setting/video_setting.dart

@@ -21,6 +21,8 @@ class _VideoSettingState extends State<VideoSetting> {
   late dynamic defaultAudioQa;
   late dynamic defaultDecode;
   late dynamic secondDecode;
+  late dynamic hardwareDecoding;
+  late dynamic videoSync;
 
   @override
   void initState() {
@@ -33,6 +35,10 @@ class _VideoSettingState extends State<VideoSetting> {
         defaultValue: VideoDecodeFormats.values.last.code);
     secondDecode = setting.get(SettingBoxKey.secondDecode,
         defaultValue: VideoDecodeFormats.values[1].code);
+    hardwareDecoding = setting.get(SettingBoxKey.hardwareDecoding,
+        defaultValue: Platform.isAndroid ? 'auto-safe' : 'auto');
+    videoSync =
+        setting.get(SettingBoxKey.videoSync, defaultValue: 'display-resample');
   }
 
   @override
@@ -55,31 +61,36 @@ class _VideoSettingState extends State<VideoSetting> {
         children: [
           const SetSwitchItem(
             title: '开启硬解',
-            subTitle: '以较低功耗播放视频，若遇异常卡死，请尝试关闭',
+            subTitle: '以较低功耗播放视频，若异常卡死请关闭',
+            leading: Icon(Icons.flash_on_outlined),
             setKey: SettingBoxKey.enableHA,
             defaultVal: true,
           ),
           const SetSwitchItem(
             title: '亮度记忆',
             subTitle: '返回时自动调整视频亮度',
+            leading: Icon(Icons.brightness_6_outlined),
             setKey: SettingBoxKey.enableAutoBrightness,
             defaultVal: false,
           ),
           const SetSwitchItem(
             title: '免登录1080P',
             subTitle: '免登录查看1080P视频',
+            leading: Icon(Icons.hd_outlined),
             setKey: SettingBoxKey.p1080,
             defaultVal: true,
           ),
           const SetSwitchItem(
             title: 'CDN优化',
             subTitle: '使用优质CDN线路',
+            leading: Icon(Icons.network_check_outlined),
             setKey: SettingBoxKey.enableCDN,
             defaultVal: true,
           ),
           ListTile(
             dense: false,
             title: Text('默认画质', style: titleStyle),
+            leading: const Icon(Icons.video_settings_outlined),
             subtitle: Text(
               '当前画质：${VideoQualityCode.fromCode(defaultVideoQa)!.description!}',
               style: subTitleStyle,
@@ -106,6 +117,7 @@ class _VideoSettingState extends State<VideoSetting> {
           ListTile(
             dense: false,
             title: Text('默认音质', style: titleStyle),
+            leading: const Icon(Icons.audiotrack_outlined),
             subtitle: Text(
               '当前音质：${AudioQualityCode.fromCode(defaultAudioQa)!.description!}',
               style: subTitleStyle,
@@ -132,6 +144,7 @@ class _VideoSettingState extends State<VideoSetting> {
           ListTile(
             dense: false,
             title: Text('首选解码格式', style: titleStyle),
+            leading: const Icon(Icons.movie_creation_outlined),
             subtitle: Text(
               '首选解码格式：${VideoDecodeFormatsCode.fromCode(defaultDecode)!.description!}，请根据设备支持情况与需求调整',
               style: subTitleStyle,
@@ -162,6 +175,7 @@ class _VideoSettingState extends State<VideoSetting> {
               '非杜比视频次选：${VideoDecodeFormatsCode.fromCode(secondDecode)!.description!}，仍无则选择首个提供的解码格式',
               style: subTitleStyle,
             ),
+            leading: const Icon(Icons.swap_horizontal_circle_outlined),
             onTap: () async {
               String? result = await showDialog(
                 context: context,
@@ -184,16 +198,84 @@ class _VideoSettingState extends State<VideoSetting> {
           if (Platform.isAndroid)
             const SetSwitchItem(
               title: '优先使用 OpenSL ES 输出音频',
+              leading: Icon(Icons.speaker_outlined),
               subTitle: '关闭则优先使用AudioTrack输出音频（此项即mpv的--ao）',
               setKey: SettingBoxKey.useOpenSLES,
               defaultVal: true,
             ),
           const SetSwitchItem(
             title: '扩大缓冲区',
-            subTitle: '默认缓冲区为视频5MB/直播32MB，开启后为视频32MB/直播64MB，但会延长首次加载时间',
+            leading: Icon(Icons.storage_outlined),
+            subTitle: '默认缓冲区为视频5MB/直播32MB，开启后为32MB/64MB，加载时间变长',
             setKey: SettingBoxKey.expandBuffer,
             defaultVal: false,
           ),
+          //video-sync
+          ListTile(
+            dense: false,
+            title: Text('视频同步', style: titleStyle),
+            leading: const Icon(Icons.view_timeline_outlined),
+            subtitle: Text(
+              '当前：$videoSync（此项即mpv的--video-sync）',
+              style: subTitleStyle,
+            ),
+            onTap: () async {
+              String? result = await showDialog(
+                context: context,
+                builder: (context) {
+                  return SelectDialog<String>(
+                      title: '视频同步',
+                      value: videoSync,
+                      values: [
+                        'audio',
+                        'display-resample',
+                        'display-resample-vdrop',
+                        'display-resample-desync',
+                        'display-tempo',
+                        'display-vdrop',
+                        'display-adrop',
+                        'display-desync',
+                        'desync'
+                      ].map((e) {
+                        return {'title': e, 'value': e};
+                      }).toList());
+                },
+              );
+              if (result != null) {
+                setting.put(SettingBoxKey.videoSync, result);
+                videoSync = result;
+                setState(() {});
+              }
+            },
+          ),
+          ListTile(
+            dense: false,
+            title: Text('硬解模式', style: titleStyle),
+            leading: const Icon(Icons.memory_outlined),
+            subtitle: Text(
+              '当前：$hardwareDecoding（此项即mpv的--hwdec）',
+              style: subTitleStyle,
+            ),
+            onTap: () async {
+              String? result = await showDialog(
+                context: context,
+                builder: (context) {
+                  return SelectDialog<String>(
+                      title: '硬解模式',
+                      value: hardwareDecoding,
+                      values: ['auto', 'auto-copy', 'auto-safe', 'no', 'yes']
+                          .map((e) {
+                        return {'title': e, 'value': e};
+                      }).toList());
+                },
+              );
+              if (result != null) {
+                setting.put(SettingBoxKey.hardwareDecoding, result);
+                hardwareDecoding = result;
+                setState(() {});
+              }
+            },
+          ),
         ],
       ),
     );