QingTing-Player/lib/metadata/metadata_reader.dart

// lib/metadata/metadata_reader.dart
import 'dart:io';
import 'dart:typed_data';
import 'package:flutter/foundation.dart';
import 'package:audio_metadata_reader/audio_metadata_reader.dart' as amr;
import 'metadata_model.dart';

class MetadataReader {
  Future<RawMetadata> readRawMetadata(File file) async {
    try {
      final meta = amr.readMetadata(file, getImage: true);

      debugPrint('📢 [MetadataReader] pictures count: ${meta.pictures.length}');

      Uint8List? artwork;
      if (meta.pictures.isNotEmpty) {
        try {
          final pic = meta.pictures.first;
          // 尝试获取图片数据，兼容不同字段名
          artwork = (pic as dynamic).bytes ?? (pic as dynamic).data;
          if (artwork != null) {
            debugPrint(
                '📢 [MetadataReader] artwork extracted: ${artwork.length} bytes');
          }
        } catch (e) {
          debugPrint('⚠️ [MetadataReader] artwork extraction failed: $e');
        }
      } else {
        debugPrint('📢 [MetadataReader] no artwork found');
      }

      return RawMetadata(
        title: meta.title ?? '',
        artist: meta.artist ?? '',
        album: meta.album ?? '',
        genres: meta.genres,
        performers: meta.performers,
        year: _toInt(meta.year),
        trackNumber: _toInt(meta.trackNumber),
        trackTotal: _toInt(meta.trackTotal),
        discNumber: _toInt(meta.discNumber),
        totalDisc: _toInt(meta.totalDisc),
        duration: meta.duration,
        artwork: artwork,
      );
    } catch (e) {
      debugPrint('⚠️ [MetadataReader] read failed: $e');
      return const RawMetadata();
    }
  }

  int _toInt(dynamic value) {
    if (value == null) return 0;
    if (value is int) return value;
    if (value is String) return int.tryParse(value) ?? 0;
    if (value is num) return value.toInt();
    return 0;
  }
}