92 lines
2.1 KiB
Dart
92 lines
2.1 KiB
Dart
// lib/services/playback_service.dart
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import 'package:media_kit/media_kit.dart';
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// ============================================================
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// PlaybackService - 播放引擎封装
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// 职责：管理 Player 生命周期，不涉及业务逻辑
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// ============================================================
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class PlaybackService {
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static final PlaybackService _instance = PlaybackService._internal();
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factory PlaybackService() => _instance;
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PlaybackService._internal();
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Player? _player;
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bool _initialized = false;
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// ---------- Getter ----------
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Player get player {
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if (!_initialized) init();
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return _player!;
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}
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bool get isInitialized => _initialized;
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// ---------- 初始化 ----------
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void init() {
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if (_initialized) return;
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_player = Player();
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_initialized = true;
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// 可以在这里配置初始参数
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// _player.setVolume(1.0);
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}
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// ---------- 播放 ----------
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Future<void> play(String url, {Map<String, String>? headers}) async {
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if (!_initialized) init();
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final media = (headers != null && headers.isNotEmpty)
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? Media(url, httpHeaders: headers)
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: Media(url);
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await _player!.open(media);
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await _player!.play();
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}
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// ---------- 控制 ----------
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Future<void> pause() async {
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if (_initialized && _player != null) {
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await _player!.pause();
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}
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}
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Future<void> resume() async {
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if (_initialized && _player != null) {
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await _player!.play();
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}
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}
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Future<void> stop() async {
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if (_initialized && _player != null) {
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await _player!.stop();
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}
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}
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Future<void> seek(Duration position) async {
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if (_initialized && _player != null) {
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await _player!.seek(position);
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}
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}
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void setVolume(double volume) {
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if (_initialized && _player != null) {
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_player!.setVolume(volume);
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}
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}
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// ---------- 释放 ----------
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void dispose() {
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if (_initialized && _player != null) {
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_player!.dispose();
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_player = null;
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_initialized = false;
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}
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}
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// ---------- 重新初始化（用于 Hot Restart 场景） ----------
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void reinitialize() {
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dispose();
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init();
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}
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}
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