refactor(dart): extract queue search and media policies

2026-09-24 02:20:59 +02:00 · 2026-07-26 01:13:52 +07:00
parent 1cfda41ef2
commit 20081b14bd
11 changed files with 1647 additions and 1367 deletions
@@ -0,0 +1,181 @@
+import 'package:ffmpeg_kit_flutter_new_full/ffmpeg_session.dart';
+
+/// Describes an extension-requested decryption step without coupling callers
+/// to the FFmpeg execution service.
+class DownloadDecryptionDescriptor {
+  final String strategy;
+  final String key;
+  final String? iv;
+  final String? inputFormat;
+  final String? outputExtension;
+  final Map<String, dynamic> options;
+
+  const DownloadDecryptionDescriptor({
+    required this.strategy,
+    required this.key,
+    this.iv,
+    this.inputFormat,
+    this.outputExtension,
+    this.options = const {},
+  });
+
+  factory DownloadDecryptionDescriptor.fromJson(Map<String, dynamic> json) {
+    final rawOptions = json['options'];
+    return DownloadDecryptionDescriptor(
+      strategy: (json['strategy'] as String? ?? '').trim(),
+      key: (json['key'] as String? ?? '').trim(),
+      iv: (json['iv'] as String?)?.trim(),
+      inputFormat: (json['input_format'] as String?)?.trim(),
+      outputExtension: (json['output_extension'] as String?)?.trim(),
+      options: rawOptions is Map
+          ? Map<String, dynamic>.from(rawOptions)
+          : const {},
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    final json = <String, dynamic>{'strategy': strategy, 'key': key};
+    if (iv != null && iv!.isNotEmpty) {
+      json['iv'] = iv;
+    }
+    if (inputFormat != null && inputFormat!.isNotEmpty) {
+      json['input_format'] = inputFormat;
+    }
+    if (outputExtension != null && outputExtension!.isNotEmpty) {
+      json['output_extension'] = outputExtension;
+    }
+    if (options.isNotEmpty) {
+      json['options'] = options;
+    }
+    return json;
+  }
+
+  static DownloadDecryptionDescriptor? fromDownloadResult(
+    Map<String, dynamic> result,
+  ) {
+    final rawDecryption = result['decryption'];
+    if (rawDecryption is Map) {
+      final descriptorJson = Map<String, dynamic>.from(rawDecryption);
+      descriptorJson['output_extension'] ??= result['output_extension'];
+      final descriptor = DownloadDecryptionDescriptor.fromJson(descriptorJson);
+      if (descriptor.normalizedStrategy == 'ffmpeg.mov_key' &&
+          descriptor.key.isNotEmpty) {
+        return descriptor;
+      }
+    }
+
+    final legacyKey = (result['decryption_key'] as String?)?.trim() ?? '';
+    if (legacyKey.isEmpty) {
+      return null;
+    }
+
+    return DownloadDecryptionDescriptor(
+      strategy: 'ffmpeg.mov_key',
+      key: legacyKey,
+      inputFormat: 'mov',
+      outputExtension: (result['output_extension'] as String?)?.trim(),
+    );
+  }
+
+  String get normalizedStrategy {
+    switch (strategy.trim().toLowerCase()) {
+      case '':
+      case 'ffmpeg.mov_key':
+      case 'ffmpeg_mov_key':
+      case 'mov_decryption_key':
+      case 'mp4_decryption_key':
+      case 'ffmpeg.mp4_decryption_key':
+        return 'ffmpeg.mov_key';
+      default:
+        return strategy.trim();
+    }
+  }
+
+  String? get normalizedOutputExtension {
+    final trimmed = (outputExtension ?? '').trim().toLowerCase();
+    if (trimmed.isEmpty) return null;
+    return trimmed.startsWith('.') ? trimmed : '.$trimmed';
+  }
+}
+
+class CueSplitTrackInfo {
+  final int number;
+  final String title;
+  final String artist;
+  final String isrc;
+  final String composer;
+  final double startSec;
+  final double endSec;
+
+  CueSplitTrackInfo({
+    required this.number,
+    required this.title,
+    required this.artist,
+    this.isrc = '',
+    this.composer = '',
+    required this.startSec,
+    required this.endSec,
+  });
+
+  factory CueSplitTrackInfo.fromJson(Map<String, dynamic> json) {
+    return CueSplitTrackInfo(
+      number: json['number'] as int? ?? 0,
+      title: json['title'] as String? ?? '',
+      artist: json['artist'] as String? ?? '',
+      isrc: json['isrc'] as String? ?? '',
+      composer: json['composer'] as String? ?? '',
+      startSec: (json['start_sec'] as num?)?.toDouble() ?? 0.0,
+      endSec: (json['end_sec'] as num?)?.toDouble() ?? -1.0,
+    );
+  }
+}
+
+class FFmpegResult {
+  final bool success;
+  final int returnCode;
+  final String output;
+
+  FFmpegResult({
+    required this.success,
+    required this.returnCode,
+    required this.output,
+  });
+}
+
+class LiveDecryptedStreamResult {
+  final String localUrl;
+  final String format;
+  final FFmpegSession session;
+
+  LiveDecryptedStreamResult({
+    required this.localUrl,
+    required this.format,
+    required this.session,
+  });
+}
+
+/// Result of an EBU R128 loudness scan, used to compute ReplayGain tags.
+class ReplayGainResult {
+  /// Track gain in dB, e.g. "-6.50 dB".
+  final String trackGain;
+
+  /// Track peak as a linear ratio, e.g. "0.988831".
+  final String trackPeak;
+
+  /// Raw integrated loudness in LUFS (needed for album gain computation).
+  final double integratedLufs;
+
+  /// Raw true peak as linear ratio (needed for album peak computation).
+  final double truePeakLinear;
+
+  const ReplayGainResult({
+    required this.trackGain,
+    required this.trackPeak,
+    required this.integratedLufs,
+    required this.truePeakLinear,
+  });
+
+  @override
+  String toString() =>
+      'ReplayGainResult(trackGain: $trackGain, trackPeak: $trackPeak)';
+}