Handle SMTC command

AilianBT/Constant/Definition.cs

@@ -12,5 +12,7 @@ public class Definition
         public const string SETTING_MAGNET_AUTO_DOWNLOAD_PROTOCAL_THUNDER = "thunder://";
 
         public const double WINDOW_MODE_WIDE_WIDTH = 768;
+
+        public const string MUSIC_DOWNLOAD_GROUP_NAME = "MusicCaching";
     }
 }

AilianBT/Services/MusicManager.cs

@@ -1,19 +1,24 @@
 using AilianBT.Models;
 using GalaSoft.MvvmLight.Ioc;
-using Microsoft.EntityFrameworkCore.Query.Internal;
 using System;
 using System.Collections.Generic;
-using System.IO;
 using System.Linq;
 using System.Text.Json;
 using System.Threading.Tasks;
 using Windows.Media;
 using Windows.Media.Core;
 using Windows.Media.Playback;
-using Windows.UI.WebUI;
 
 namespace AilianBT.Services
 {
+    public enum SMTCCommandType
+    {
+        Play,
+        Pause,
+        Previous,
+        Next
+    }
+
     public class MusicManager
     {
         private MediaPlayer _mediaPlayer;
@@ -36,6 +41,16 @@ public MusicManager()
             _mediaPlayer.Source = _mediaPlaybackList;
             _mediaPlayer.PlaybackSession.PositionChanged += PlaybackSession_PositionChanged;
             _mediaPlayer.MediaEnded += _mediaPlayerMediaEnded;
+
+            _mediaPlayer.CommandManager.PlayBehavior.EnablingRule = MediaCommandEnablingRule.Always;
+            _mediaPlayer.CommandManager.PauseBehavior.EnablingRule = MediaCommandEnablingRule.Always;
+            _mediaPlayer.CommandManager.NextBehavior.EnablingRule = MediaCommandEnablingRule.Always;
+            _mediaPlayer.CommandManager.PreviousBehavior.EnablingRule = MediaCommandEnablingRule.Always;
+
+            _mediaPlayer.CommandManager.PlayReceived += _commandManagerPlayReceived;
+            _mediaPlayer.CommandManager.PauseReceived += _commandManagerPauseReceived;
+            _mediaPlayer.CommandManager.NextReceived += _commandManagerNextReceived;
+            _mediaPlayer.CommandManager.PreviousReceived += _commandManagerPreviousReceived;
         }
 
         private void PlaybackSession_PositionChanged(MediaPlaybackSession sender, object args)
@@ -48,8 +63,8 @@ private void PlaybackSession_PositionChanged(MediaPlaybackSession sender, object
         public event Action<MusicModel> MediaFailed;
         public event Action<MusicModel> MediaCached;
         public event Action<TimeSpan, TimeSpan> PositionChanged;
+        public event Action<SMTCCommandType> SMTCCommandReceived;
 
-
         #region MediaPlaybackList callbacks
         private void _mediaPlaybackListItemOpened(MediaPlaybackList sender, MediaPlaybackItemOpenedEventArgs args)
         {
@@ -156,6 +171,7 @@ public async Task Seek(TimeSpan position)
         {
             _mediaPlayer.PlaybackSession.Position = position;
         }
+
         private async Task _play(MusicModel model)
         {
             try
@@ -189,11 +205,6 @@ private async Task _play(MusicModel model)
             return index;
         }
 
-        private MediaPlaybackItem _createPlaceholderItem()
-        {
-            return new MediaPlaybackItem(MediaSource.CreateFromUri(new Uri("cq://cq")));
-        }
-
         private async Task<MediaPlaybackItem> _cacheMusic(MusicModel model)
         {
             if (!CachedMusicList.Any(m => m.Title == model.Title))
@@ -202,5 +213,31 @@ private async Task<MediaPlaybackItem> _cacheMusic(MusicModel model)
             }
             return await Add(model);
         }
+
+        #region SMTC commnad
+        private void _commandManagerPreviousReceived(MediaPlaybackCommandManager sender, MediaPlaybackCommandManagerPreviousReceivedEventArgs args)
+        {
+            args.Handled = true;
+            SMTCCommandReceived?.Invoke(SMTCCommandType.Previous);
+        }
+
+        private void _commandManagerNextReceived(MediaPlaybackCommandManager sender, MediaPlaybackCommandManagerNextReceivedEventArgs args)
+        {
+            args.Handled = true;
+            SMTCCommandReceived?.Invoke(SMTCCommandType.Next);
+        }
+
+        private void _commandManagerPauseReceived(MediaPlaybackCommandManager sender, MediaPlaybackCommandManagerPauseReceivedEventArgs args)
+        {
+            args.Handled = true;
+            SMTCCommandReceived?.Invoke(SMTCCommandType.Pause);
+        }
+
+        private void _commandManagerPlayReceived(MediaPlaybackCommandManager sender, MediaPlaybackCommandManagerPlayReceivedEventArgs args)
+        {
+            args.Handled = true;
+            SMTCCommandReceived?.Invoke(SMTCCommandType.Play);
+        }
+        #endregion
     }
 }

AilianBT/Services/MusicService.cs

@@ -2,7 +2,6 @@
 using AilianBT.Constant;
 using AilianBT.Helpers;
 using AilianBT.Models;
-using Microsoft.EntityFrameworkCore.Internal;
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -15,7 +14,6 @@
 using Windows.Networking.BackgroundTransfer;
 using Windows.Storage;
 using Windows.Storage.Streams;
-using Windows.UI.WindowManagement;
 
 namespace AilianBT.Services
 {
@@ -31,7 +29,7 @@ public class MusicService
         private StorageService _storageService;
 
         private BackgroundDownloader _backgroundDownloader;
-        private BackgroundTransferGroup _backgroundDownloaderGroup = BackgroundTransferGroup.CreateGroup(DOWNLOAD_GROUP_NAME);
+        private BackgroundTransferGroup _backgroundDownloaderGroup = BackgroundTransferGroup.CreateGroup(Definition.MUSIC_DOWNLOAD_GROUP_NAME);
 
         public MusicService(UtilityHelper utilityHelper,LogService logger, StorageService storageService)
         {
@@ -43,7 +41,6 @@ public MusicService(UtilityHelper utilityHelper,LogService logger, StorageServic
         }
 
         #region Playlist
-
         public async Task<IList<MusicModel>> GetNetPlayListAsync()
         {
             var musicList = new List<MusicModel>();
@@ -129,7 +126,6 @@ public async Task CachePlayListAsync(IList<MusicModel> playlist)
         }
         #endregion
 
-        private const string DOWNLOAD_GROUP_NAME = "MusicCaching";
         private void _initDownloader()
         {
             _backgroundDownloader = new BackgroundDownloader();

AilianBT/ViewModels/PlayerViewModel.cs

@@ -20,6 +20,7 @@ public PlayerViewModel()
             _musicManager.MediaLoaded += _musicManagerMediaLoaded;
             _musicManager.MediaEnd += _musicManagerMediaEnd;
             _musicManager.MediaFailed += _musicManagerMediaFailed;
+            _musicManager.SMTCCommandReceived += _musicManagerSMTCCommandReceived;
         }
 
         public void SetMusicList(Collection<MusicModel> musicList)
@@ -226,6 +227,30 @@ private void _playbackPositionChanged(TimeSpan position, TimeSpan length)
                 }, null);
             }
         }
+
+        private void _musicManagerSMTCCommandReceived(SMTCCommandType command)
+        {
+            SynchronizationContext.Post((o) =>
+            {
+                switch (command)
+                {
+                    case SMTCCommandType.Play:
+                        PlayClicked();
+                        break;
+                    case SMTCCommandType.Pause:
+                        PauseClicked();
+                        break;
+                    case SMTCCommandType.Previous:
+                        PreviousClicked();
+                        break;
+                    case SMTCCommandType.Next:
+                        NextClicked();
+                        break;
+                    default:
+                        break;
+                }
+            }, null);
+        }
         #endregion
     }
 }

AilianBT/Views/MusicView.xaml

@@ -51,8 +51,7 @@
                                    Text="{x:Bind Title, Mode=OneWay}"
                                    TextWrapping="Wrap" />
                         <TextBlock Grid.Column="2"
-                                   Width="40"
-                                   Margin="4"
+                                   Margin="16,0"
                                    VerticalAlignment="Center"
                                    FontFamily="{StaticResource FontAwesome}"
                                    FontSize="16"
@@ -63,8 +62,7 @@
                                    Visibility="{Binding Path=Visibility, ElementName=tbIconCached, Converter={StaticResource VisibilityInverseConverter}}" />
                         <TextBlock x:Name="tbIconCached"
                                    Grid.Column="2"
-                                   Width="40"
-                                   Margin="4"
+                                   Margin="16,0"
                                    VerticalAlignment="Center"
                                    FontFamily="{StaticResource FontAwesome}"
                                    FontSize="16"