Add disposePlayer to platform interface. Retain player.position after dispose.

just_audio/darwin/Classes/AudioPlayer.m

@@ -37,17 +37,15 @@
     FlutterResult _playResult;
     id _timeObserver;
     BOOL _automaticallyWaitsToMinimizeStalling;
-    BOOL _configuredSession;
     BOOL _playing;
     float _speed;
 }
 
-- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar playerId:(NSString*)idParam configuredSession:(BOOL)configuredSession {
+- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar playerId:(NSString*)idParam {
     self = [super init];
     NSAssert(self, @"super init cannot be nil");
     _registrar = registrar;
     _playerId = idParam;
-    _configuredSession = configuredSession;
     _methodChannel =
         [FlutterMethodChannel methodChannelWithName:[NSMutableString stringWithFormat:@"com.ryanheise.just_audio.methods.%@", _playerId]
                                     binaryMessenger:[registrar messenger]];
@@ -113,9 +111,6 @@
             [self seek:position index:request[@"index"] completionHandler:^(BOOL finished) {
                 result(@{});
             }];
-        } else if ([@"dispose" isEqualToString:call.method]) {
-            [self dispose];
-            result(@{});
         } else if ([@"concatenatingInsertAll" isEqualToString:call.method]) {
             [self concatenatingInsertAll:(NSString *)request[@"id"] index:[request[@"index"] intValue] sources:(NSArray *)request[@"children"]];
             result(@{});
@@ -908,11 +903,6 @@
         _playResult = result;
     }
     _playing = YES;
-#if TARGET_OS_IPHONE
-    if (_configuredSession) {
-        [[AVAudioSession sharedInstance] setActive:YES error:nil];
-    }
-#endif
     _player.rate = _speed;
     [self updatePosition];
     if (@available(macOS 10.12, iOS 10.0, *)) {}

just_audio/darwin/Classes/JustAudioPlugin.m

@@ -5,7 +5,7 @@
 
 @implementation JustAudioPlugin {
     NSObject<FlutterPluginRegistrar>* _registrar;
-    BOOL _configuredSession;
+    NSMutableDictionary<NSString *, AudioPlayer *> *_players;
 }
 
 + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
@@ -20,6 +20,7 @@
     self = [super init];
     NSAssert(self, @"super init cannot be nil");
     _registrar = registrar;
+    _players = [[NSMutableDictionary alloc] init];
     return self;
 }
 
@@ -27,11 +28,25 @@
     if ([@"init" isEqualToString:call.method]) {
         NSDictionary *request = (NSDictionary *)call.arguments;
         NSString *playerId = request[@"id"];
-        /*AudioPlayer* player =*/ [[AudioPlayer alloc] initWithRegistrar:_registrar playerId:playerId configuredSession:_configuredSession];
+        AudioPlayer* player = [[AudioPlayer alloc] initWithRegistrar:_registrar playerId:playerId];
+        [_players setValue:player forKey:playerId];
         result(nil);
+    } else if ([@"disposePlayer" isEqualToString:call.method]) {
+        NSDictionary *request = (NSDictionary *)call.arguments;
+        NSString *playerId = request[@"id"];
+        [_players[playerId] dispose];
+        [_players setValue:nil forKey:playerId];
+        result(@{});
     } else {
         result(FlutterMethodNotImplemented);
     }
 }
 
+- (void)dealloc {
+    for (NSString *playerId in _players) {
+        [_players[playerId] dispose];
+    }
+    [_players removeAllObjects];
+}
+
 @end

just_audio/example/ios/Podfile

@@ -10,75 +10,29 @@ project 'Runner', {
   'Release' => :release,
 }
 
-def parse_KV_file(file, separator='=')
-  file_abs_path = File.expand_path(file)
-  if !File.exists? file_abs_path
-    return [];
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
   end
-  generated_key_values = {}
-  skip_line_start_symbols = ["#", "/"]
-  File.foreach(file_abs_path) do |line|
-    next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
-    plugin = line.split(pattern=separator)
-    if plugin.length == 2
-      podname = plugin[0].strip()
-      path = plugin[1].strip()
-      podpath = File.expand_path("#{path}", file_abs_path)
-      generated_key_values[podname] = podpath
-    else
-      puts "Invalid plugin specification: #{line}"
-    end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
   end
-  generated_key_values
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
 end
 
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
 target 'Runner' do
-  # Flutter Pod
-
-  copied_flutter_dir = File.join(__dir__, 'Flutter')
-  copied_framework_path = File.join(copied_flutter_dir, 'Flutter.framework')
-  copied_podspec_path = File.join(copied_flutter_dir, 'Flutter.podspec')
-  unless File.exist?(copied_framework_path) && File.exist?(copied_podspec_path)
-    # Copy Flutter.framework and Flutter.podspec to Flutter/ to have something to link against if the xcode backend script has not run yet.
-    # That script will copy the correct debug/profile/release version of the framework based on the currently selected Xcode configuration.
-    # CocoaPods will not embed the framework on pod install (before any build phases can generate) if the dylib does not exist.
-
-    generated_xcode_build_settings_path = File.join(copied_flutter_dir, 'Generated.xcconfig')
-    unless File.exist?(generated_xcode_build_settings_path)
-      raise "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter pub get is executed first"
-    end
-    generated_xcode_build_settings = parse_KV_file(generated_xcode_build_settings_path)
-    cached_framework_dir = generated_xcode_build_settings['FLUTTER_FRAMEWORK_DIR'];
-
-    unless File.exist?(copied_framework_path)
-      FileUtils.cp_r(File.join(cached_framework_dir, 'Flutter.framework'), copied_flutter_dir)
-    end
-    unless File.exist?(copied_podspec_path)
-      FileUtils.cp(File.join(cached_framework_dir, 'Flutter.podspec'), copied_flutter_dir)
-    end
-  end
-
-  # Keep pod path relative so it can be checked into Podfile.lock.
-  pod 'Flutter', :path => 'Flutter'
-
-  # Plugin Pods
-
-  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
-  # referring to absolute paths on developers' machines.
-  system('rm -rf .symlinks')
-  system('mkdir -p .symlinks/plugins')
-  plugin_pods = parse_KV_file('../.flutter-plugins')
-  plugin_pods.each do |name, path|
-    symlink = File.join('.symlinks', 'plugins', name)
-    File.symlink(path, symlink)
-    pod name, :path => File.join(symlink, 'ios')
-  end
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
 end
 
 post_install do |installer|
   installer.pods_project.targets.each do |target|
-    target.build_configurations.each do |config|
-      config.build_settings['ENABLE_BITCODE'] = 'NO'
-    end
+    flutter_additional_ios_build_settings(target)
   end
 end

just_audio/example/ios/Podfile.lock

@@ -6,18 +6,12 @@ PODS:
     - Flutter
   - path_provider (0.0.1):
     - Flutter
-  - path_provider_linux (0.0.1):
-    - Flutter
-  - path_provider_macos (0.0.1):
-    - Flutter
 
 DEPENDENCIES:
   - audio_session (from `.symlinks/plugins/audio_session/ios`)
   - Flutter (from `Flutter`)
   - just_audio (from `.symlinks/plugins/just_audio/ios`)
   - path_provider (from `.symlinks/plugins/path_provider/ios`)
-  - path_provider_linux (from `.symlinks/plugins/path_provider_linux/ios`)
-  - path_provider_macos (from `.symlinks/plugins/path_provider_macos/ios`)
 
 EXTERNAL SOURCES:
   audio_session:
@@ -28,19 +22,13 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/just_audio/ios"
   path_provider:
     :path: ".symlinks/plugins/path_provider/ios"
-  path_provider_linux:
-    :path: ".symlinks/plugins/path_provider_linux/ios"
-  path_provider_macos:
-    :path: ".symlinks/plugins/path_provider_macos/ios"
 
 SPEC CHECKSUMS:
   audio_session: 4f3e461722055d21515cf3261b64c973c062f345
   Flutter: 0e3d915762c693b495b44d77113d4970485de6ec
   just_audio: baa7252489dbcf47a4c7cc9ca663e9661c99aafa
   path_provider: abfe2b5c733d04e238b0d8691db0cfd63a27a93c
-  path_provider_linux: 4d630dc393e1f20364f3e3b4a2ff41d9674a84e4
-  path_provider_macos: f760a3c5b04357c380e2fddb6f9db6f3015897e0
 
-PODFILE CHECKSUM: f32fb4e7c14f8b3ca19a369d7be425dd9241af27
+PODFILE CHECKSUM: 8e679eca47255a8ca8067c4c67aab20e64cb974d
 
 COCOAPODS: 1.9.3

just_audio/example/macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,12 +5,12 @@
 import FlutterMacOS
 import Foundation
 
-import path_provider_macos
 import audio_session
 import just_audio
+import path_provider_macos
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
-  PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
   AudioSessionPlugin.register(with: registry.registrar(forPlugin: "AudioSessionPlugin"))
   JustAudioPlugin.register(with: registry.registrar(forPlugin: "JustAudioPlugin"))
+  PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
 }

just_audio/ios/Classes/AudioPlayer.h

@@ -2,7 +2,8 @@
 
 @interface AudioPlayer : NSObject<FlutterStreamHandler>
 
-- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar playerId:(NSString*)idParam configuredSession:(BOOL)configuredSession;
+- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar playerId:(NSString*)idParam;
+- (void)dispose;
 
 @end
 

just_audio/lib/just_audio.dart

@@ -324,7 +324,6 @@ class AudioPlayer {
 
   /// The current position of the player.
   Duration get position {
-    if (_disposed) return null;
     if (playing && processingState == ProcessingState.ready) {
       final result = _playbackEvent.updatePosition +
           (DateTime.now().difference(_playbackEvent.updateTime)) * speed;
@@ -682,7 +681,13 @@ class AudioPlayer {
   Future<void> dispose() async {
     if (_disposed) return;
     _disposed = true;
-    await (await _platform).dispose(DisposeRequest());
+    try {
+      await JustAudioPlatform.instance
+          .disposePlayer(DisposePlayerRequest(id: _id));
+    } catch (e) {
+      print("disposePlayer() not implemented. Falling back to dispose()");
+      await (await _platform).dispose(DisposeRequest());
+    }
     _audioSource = null;
     _audioSources.values.forEach((s) => s._dispose());
     _audioSources.clear();

just_audio/macos/Classes/AudioPlayer.h

@@ -2,7 +2,8 @@
 
 @interface AudioPlayer : NSObject<FlutterStreamHandler>
 
-- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar playerId:(NSString*)idParam configuredSession:(BOOL)configuredSession;
+- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar playerId:(NSString*)idParam;
+- (void)dispose;
 
 @end
 

just_audio/pubspec.yaml

@@ -8,7 +8,9 @@ environment:
   flutter: ">=1.12.13+hotfix.5"
 
 dependencies:
-  just_audio_platform_interface: ^1.0.0
+  # just_audio_platform_interface: ^1.0.0
+  just_audio_platform_interface:
+    path: ../just_audio_platform_interface
   audio_session: ^0.0.7
   rxdart: ^0.24.1
   path: ^1.6.4

just_audio_platform_interface/lib/just_audio_platform_interface.dart

@@ -41,6 +41,11 @@ abstract class JustAudioPlatform extends PlatformInterface {
   Future<AudioPlayerPlatform> init(InitRequest request) {
     throw UnimplementedError('init() has not been implemented.');
   }
+
+  /// Disposes of a platform player.
+  Future<DisposePlayerResponse> disposePlayer(DisposePlayerRequest request) {
+    throw UnimplementedError('disposePlayer() has not been implemented.');
+  }
 }
 
 /// A nested platform interface for communicating with a particular player
@@ -53,6 +58,10 @@ abstract class JustAudioPlatform extends PlatformInterface {
 /// `implements` this interface will be broken by newly added
 /// [AudioPlayerPlatform] methods.
 abstract class AudioPlayerPlatform {
+  final String id;
+
+  AudioPlayerPlatform(this.id);
+
   Stream<PlaybackEventMessage> get playbackEventMessageStream {
     throw UnimplementedError(
         'playbackEventMessageStream has not been implemented.');
@@ -103,6 +112,9 @@ abstract class AudioPlayerPlatform {
         "setAndroidAudioAttributes() has not been implemented.");
   }
 
+  /// This method has been superceded by [JustAudioPlatform.disposePlayer].
+  /// For backward compatibility, this method will still be called as a
+  /// fallback if [JustAudioPlatform.disposePlayer] is not implemented.
   Future<DisposeResponse> dispose(DisposeRequest request) {
     throw UnimplementedError("dispose() has not been implemented.");
   }
@@ -244,6 +256,21 @@ class InitRequest {
       };
 }
 
+class DisposePlayerRequest {
+  final String id;
+
+  DisposePlayerRequest({@required this.id});
+
+  Map<dynamic, dynamic> toMap() => {
+        'id': id,
+      };
+}
+
+class DisposePlayerResponse {
+  static DisposePlayerResponse fromMap(Map<dynamic, dynamic> map) =>
+      DisposePlayerResponse();
+}
+
 class LoadRequest {
   final AudioSourceMessage audioSourceMessage;
 

just_audio_platform_interface/lib/method_channel_just_audio.dart

@@ -13,15 +13,22 @@ class MethodChannelJustAudio extends JustAudioPlatform {
     await _mainChannel.invokeMethod('init', request.toMap());
     return MethodChannelAudioPlayer(request.id);
   }
+
+  @override
+  Future<DisposePlayerResponse> disposePlayer(
+      DisposePlayerRequest request) async {
+    return DisposePlayerResponse.fromMap(
+        await _mainChannel.invokeMethod('disposePlayer', request.toMap()));
+  }
 }
 
 /// An implementation of [AudioPlayerPlatform] that uses method channels.
 class MethodChannelAudioPlayer extends AudioPlayerPlatform {
-  final String id;
   final MethodChannel _channel;
 
-  MethodChannelAudioPlayer(this.id)
-      : _channel = MethodChannel('com.ryanheise.just_audio.methods.$id');
+  MethodChannelAudioPlayer(String id)
+      : _channel = MethodChannel('com.ryanheise.just_audio.methods.$id'),
+        super(id);
 
   @override
   Stream<PlaybackEventMessage> get playbackEventMessageStream =>