初始化

2026-09-15 15:44:13 +07:00
commit a23ba685e9
1065 changed files with 101122 additions and 0 deletions
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+import 'package:flutter/services.dart';
+import 'package:mime/mime.dart';
+
+import '../track_event_manager/device_service.dart';
+import 'file_util.dart';
+
+class MediaInfo {
+  int? size;
+  String? resolution;
+  int? videoHeight;
+  double? ratio;
+  int? playTime;
+  String? bitrate;
+  String? mimeType;
+}
+
+const _channel = MethodChannel(DeviceInfoService.naticeChannel);
+
+/// 获取本地视频的元信息（高度/分辨率/比例/时长/比特率/大小/MIME）
+Future<MediaInfo?> getMediaInfo(String localPath) async {
+  if (!FileUtil.isFileExist(localPath)) return null;
+  final info = MediaInfo();
+  info.videoHeight = int.tryParse(await _invokeChannel("getVideoHeight", localPath, "")) ?? 0;
+  info.resolution = await _invokeChannel("getVideoResolution", localPath, "");
+  info.ratio = double.tryParse(await _invokeChannel("getVideoRatio", localPath, "")) ?? 0;
+  info.playTime = await _invokeChannel("getVideoDuration", localPath, 0);
+  info.bitrate = await _invokeChannel("getVideoBitrate", localPath, "");
+  info.size = FileUtil.getFileSize(localPath);
+  info.mimeType = _getMimeType(localPath);
+  return info;
+}
+
+/// 统一调用原生方法，异常或类型不符时返回 fallback
+/// 注：不能只 catch PlatformException——原生 notImplemented / 没实现该 channel(iOS 就没实现这几个)
+/// 抛的是 MissingPluginException，不是 PlatformException，只兜前者等于没兜
+Future<T> _invokeChannel<T>(String method, String localPath, T fallback) async {
+  try {
+    final result = await _channel.invokeMethod(method, {'filePath': localPath});
+    return result is T ? result : fallback;
+  } catch (_) {
+    return fallback;
+  }
+}
+
+/// 获取 MIME 类型，识别不到返回空串
+String _getMimeType(String localPath) => lookupMimeType(localPath) ?? '';