feat: 新增字幕功能，倍速移至底部

lib/http/video.dart

@@ -1,4 +1,5 @@
 import 'dart:developer';
+import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 import 'package:hive/hive.dart';
 import '../common/constants.dart';
 import '../models/common/reply_type.dart';
@@ -155,7 +156,8 @@ class VideoHttp {
     }
 
     // 免登录查看1080p
-    if ((userInfoCache.get('userInfoCache') == null || MineController.anonymity) &&
+    if ((userInfoCache.get('userInfoCache') == null ||
+            MineController.anonymity) &&
         setting.get(SettingBoxKey.p1080, defaultValue: true)) {
       data['try_look'] = 1;
     }
@@ -476,4 +478,110 @@ class VideoHttp {
       return {'status': false, 'data': []};
     }
   }
+
+  static Future subtitlesJson(
+      {String? aid, String? bvid, required int cid}) async {
+    assert(aid != null || bvid != null);
+    var res = await Request().get(Api.subtitleUrl, data: {
+      if (aid != null) 'aid': aid,
+      if (bvid != null) 'bvid': bvid,
+      'cid': cid,
+    });
+    if (res.data['code'] == 0) {
+      dynamic data = res.data['data'];
+      List subtitlesJson = data['subtitle']['subtitles'];
+      /*
+      [
+        {
+          "id": 1430455228267894300,
+          "lan": "ai-zh",
+          "lan_doc": "中文（自动生成）",
+          "is_lock": false,
+          "subtitle_url": "//aisubtitle.hdslb.com/bfs/ai_subtitle/prod/15508958271448462983dacf99a49f40ccdf91a4df8d925e2b58?auth_key=1708941835-aaa0e44844594386ad356795733983a2-0-89af73c6aad5a1fca43b02113fa9d485",
+          "type": 1,
+          "id_str": "1430455228267894272",
+          "ai_type": 0,
+          "ai_status": 2
+        }
+      ]
+       */
+      return {
+        'status': true,
+        'data': subtitlesJson,
+      };
+    } else {
+      return {'status': false, 'data': [], 'msg': res.data['message']};
+    }
+  }
+
+  static Future vttSubtitles(List subtitlesJson) async {
+    if (subtitlesJson.isEmpty) {
+      return [];
+    }
+    List<Map<String, String>> subtitlesVtt = [];
+
+    String subtitleTimecode(double seconds) {
+      int h = (seconds / 3600).floor();
+      int m = ((seconds % 3600) / 60).floor();
+      int s = (seconds % 60).floor();
+      int ms = ((seconds * 1000) % 1000).floor();
+      if (h == 0) {
+        return "${m.toString().padLeft(2, '0')}:${s.toString().padLeft(2, '0')}.${ms.toString().padLeft(3, '0')}";
+      }
+      return "${h.toString().padLeft(2, '0')}:${m.toString().padLeft(2, '0')}:${s.toString().padLeft(2, '0')}.${ms.toString().padLeft(3, '0')}";
+    }
+
+    for (var i in subtitlesJson) {
+      var res =
+          await Request().get("https://${i['subtitle_url'].split('//')[1]}");
+      /*
+          {
+            "font_size": 0.4,
+            "font_color": "#FFFFFF",
+            "background_alpha": 0.5,
+            "background_color": "#9C27B0",
+            "Stroke": "none",
+            "type": "AIsubtitle",
+            "lang": "zh",
+            "version": "v1.6.0.4",
+            "body": [
+              {
+                "from": 0.5,
+                "to": 1.58,
+                "sid": 1,
+                "location": 2,
+                "content": "很多人可能不知道",
+                "music": 0.0
+              },
+              ……,
+              {
+                "from": 558.629,
+                "to": 560.22,
+                "sid": 280,
+                "location": 2,
+                "content": "我们下期再见",
+                "music": 0.0
+              }
+            ]
+          }
+         */
+      if (res.data != null) {
+        String vttData = "WEBVTT\n\n";
+        for (var item in res.data['body']) {
+          vttData += "${item['sid']}\n";
+          vttData +=
+              "${subtitleTimecode(item['from'])} --> ${subtitleTimecode(item['to'])}\n";
+          vttData += "${item['content']}\n\n";
+        }
+        subtitlesVtt.add({
+          'language': i['lan'],
+          'title': i['lan_doc'],
+          'text': vttData,
+        });
+      } else {
+        SmartDialog.showToast("字幕${i['lan_doc']}加载失败, ${res.data['message']}");
+      }
+    }
+    return subtitlesVtt;
+  }
 }