327 lines
9.7 KiB
Dart
327 lines
9.7 KiB
Dart
import 'dart:io' show Platform;
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import 'package:flutter/services.dart';
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import '../font_loader.dart';
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import '../models.dart';
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import 'player_base.dart';
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/// Shared native implementation of [Player] for iOS, macOS, Android (MPV fallback), and Linux.
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/// Uses MPVKit via platform channels with Metal rendering (Apple), native window (Android),
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/// or FlTextureGL (Linux).
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class PlayerNative extends PlayerBase {
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int? _textureIdValue;
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@override
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int? get textureId => _textureIdValue;
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static const _methodChannel = MethodChannel('com.plezy/mpv_player');
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static const _eventChannel = EventChannel('com.plezy/mpv_player/events');
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@override
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MethodChannel get methodChannel => _methodChannel;
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@override
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EventChannel get eventChannel => _eventChannel;
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@override
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String get logPrefix => 'MPV';
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@override
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String get playerType => 'mpv';
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/// Node properties are returned as structured maps on macOS/iOS/Linux,
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/// but as JSON strings on Android/Windows.
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static final String _nodeFormat = (Platform.isAndroid || Platform.isWindows) ? 'string' : 'node';
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// ============================================
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// Initialization
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// ============================================
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Future<void> _ensureInitialized() async {
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if (initialized) return;
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try {
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final result = await methodChannel.invokeMethod<Object>('initialize');
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if (result is int) {
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// Linux: initialize returns the texture ID
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_textureIdValue = result;
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initialized = true;
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} else {
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initialized = result == true;
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}
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if (!initialized) {
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throw Exception('Failed to initialize player');
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}
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// Configure subtitle fonts for libass support
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await _configureSubtitleFonts();
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// Subscribe to MPV properties
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await observeProperty('time-pos', 'double');
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await observeProperty('duration', 'double');
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await observeProperty('pause', 'flag');
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await observeProperty('paused-for-cache', 'flag');
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await observeProperty('track-list', _nodeFormat);
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await observeProperty('eof-reached', 'flag');
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await observeProperty('volume', 'double');
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await observeProperty('speed', 'double');
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await observeProperty('aid', 'string');
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await observeProperty('sid', 'string');
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await observeProperty('demuxer-cache-state', _nodeFormat);
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await observeProperty('audio-device-list', _nodeFormat);
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await observeProperty('audio-device', 'string');
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} catch (e) {
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errorController.add('Initialization failed: $e');
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rethrow;
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}
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}
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/// Configures subtitle fonts for libass support.
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/// Provides a comprehensive Unicode font (Go Noto) with CJK coverage to ensure
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/// proper rendering of non-Latin characters in subtitles.
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Future<void> _configureSubtitleFonts() async {
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try {
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final fontDir = await SubtitleFontLoader.loadSubtitleFont();
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if (fontDir != null) {
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// Configure MPV to use the extracted font for libass
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await setProperty('config', 'yes');
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await setProperty('sub-fonts-dir', fontDir);
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await setProperty('sub-font', SubtitleFontLoader.fontName);
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}
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} catch (e) {
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// Font configuration is not critical - continue without it
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errorController.add('Failed to configure subtitle fonts: $e');
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}
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}
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// ============================================
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// Playback Control
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// ============================================
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/// Opens a content:// URI via the platform channel and returns the raw FD number.
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/// Returns null if the call fails.
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Future<int?> _openContentFd(String contentUri) async {
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try {
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return await methodChannel.invokeMethod<int>('openContentFd', {'uri': contentUri});
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} catch (e) {
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return null;
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}
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}
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@override
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Future<void> open(Media media, {bool play = true, bool isLive = false}) async {
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checkDisposed();
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await _ensureInitialized();
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// Show the video layer
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await setVisible(true);
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// Set HTTP headers for Plex authentication and profile
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if (media.headers != null && media.headers!.isNotEmpty) {
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final headerList = media.headers!.entries.map((e) => '${e.key}: ${e.value}').toList();
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await setProperty('http-header-fields', headerList.join(','));
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}
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// Set start position if provided (must be set before loading file)
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if (media.start != null && media.start!.inSeconds > 0) {
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await setProperty('start', media.start!.inSeconds.toString());
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} else {
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// Reset start position if not resuming
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await setProperty('start', 'none');
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}
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// Set pause BEFORE loadfile to prevent decoder from starting immediately.
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// This is important for adding external subtitles before playback begins,
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// avoiding a race condition that can freeze the video decoder on Android (issue #226).
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if (!play) {
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await setProperty('pause', 'yes');
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}
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// Convert content:// URIs to fdclose:// for MPV on Android (SAF SD card downloads)
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var uri = media.uri;
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if (Platform.isAndroid && uri.startsWith('content://')) {
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final fd = await _openContentFd(uri);
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if (fd != null) {
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uri = 'fdclose://$fd';
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}
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}
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await command(['loadfile', uri, 'replace']);
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}
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@override
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Future<void> play() async {
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checkDisposed();
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await setProperty('pause', 'no');
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}
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@override
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Future<void> pause() async {
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checkDisposed();
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await setProperty('pause', 'yes');
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}
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@override
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Future<void> stop() async {
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checkDisposed();
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await command(['stop']);
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await methodChannel.invokeMethod('setVisible', {'visible': false});
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}
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@override
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Future<void> seek(Duration position) async {
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checkDisposed();
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await command(['seek', (position.inMilliseconds / 1000.0).toString(), 'absolute']);
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}
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// ============================================
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// Track Selection
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// ============================================
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@override
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Future<void> selectAudioTrack(AudioTrack track) async {
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checkDisposed();
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await setProperty('aid', track.id);
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}
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@override
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Future<void> selectSubtitleTrack(SubtitleTrack track) async {
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checkDisposed();
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await setProperty('sid', track.id);
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}
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@override
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Future<void> addSubtitleTrack({required String uri, String? title, String? language, bool select = false}) async {
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checkDisposed();
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final args = ['sub-add', uri, select ? 'select' : 'auto'];
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if (title != null) args.add('title=$title');
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if (language != null) args.add('lang=$language');
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await command(args);
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}
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// ============================================
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// Volume and Rate
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// ============================================
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@override
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Future<void> setVolume(double volume) async {
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checkDisposed();
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await setProperty('volume', volume.toString());
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}
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@override
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Future<void> setRate(double rate) async {
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checkDisposed();
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await setProperty('speed', rate.toString());
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}
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@override
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Future<void> setAudioDevice(AudioDevice device) async {
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checkDisposed();
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await setProperty('audio-device', device.name);
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}
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// ============================================
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// MPV Properties
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// ============================================
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@override
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Future<void> setProperty(String name, String value) async {
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checkDisposed();
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await _ensureInitialized();
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await methodChannel.invokeMethod('setProperty', {'name': name, 'value': value});
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}
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@override
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Future<String?> getProperty(String name) async {
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checkDisposed();
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await _ensureInitialized();
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return await methodChannel.invokeMethod<String>('getProperty', {'name': name});
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}
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@override
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Future<void> command(List<String> args) async {
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checkDisposed();
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await _ensureInitialized();
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await methodChannel.invokeMethod('command', {'args': args});
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}
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// ============================================
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// Log Level
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// ============================================
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@override
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Future<void> setLogLevel(String level) async {
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checkDisposed();
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await _ensureInitialized();
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await methodChannel.invokeMethod('setLogLevel', {'level': level});
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}
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// ============================================
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// Passthrough
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// ============================================
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@override
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Future<void> setAudioPassthrough(bool enabled) async {
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checkDisposed();
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if (enabled) {
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await setProperty('audio-spdif', 'ac3,eac3,dts,dts-hd,truehd');
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await setProperty('audio-exclusive', 'yes');
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} else {
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await setProperty('audio-spdif', '');
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await setProperty('audio-exclusive', 'no');
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}
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}
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// ============================================
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// Platform-Specific Overrides
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// ============================================
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@override
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Future<void> updateFrame() async {
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checkDisposed();
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if (!initialized) return;
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if (Platform.isIOS || Platform.isMacOS || Platform.isLinux) {
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await methodChannel.invokeMethod('updateFrame');
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}
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}
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@override
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Future<void> setVideoFrameRate(double fps, int durationMs) async {
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checkDisposed();
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if (!Platform.isAndroid) return;
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if (!initialized) return;
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await methodChannel.invokeMethod('setVideoFrameRate', {'fps': fps, 'duration': durationMs});
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}
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@override
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Future<void> clearVideoFrameRate() async {
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checkDisposed();
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if (!Platform.isAndroid) return;
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if (!initialized) return;
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await methodChannel.invokeMethod('clearVideoFrameRate');
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}
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@override
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Future<bool> requestAudioFocus() async {
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checkDisposed();
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if (!Platform.isAndroid) return true;
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await _ensureInitialized();
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final result = await methodChannel.invokeMethod<bool>('requestAudioFocus');
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return result ?? false;
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}
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@override
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Future<void> abandonAudioFocus() async {
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checkDisposed();
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if (!Platform.isAndroid) return;
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if (!initialized) return;
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await methodChannel.invokeMethod('abandonAudioFocus');
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}
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}
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