focus and selected display fix

- focus fix for wallpaper playback.
- fixed a bug where if selected display deviceid is missing and bounds are incorrect - wallpaper loads with incorrect data.
- hw accel flag for mpv player.
- updated attribution doc.

Author: rocksdanister

src/livelywpf/livelywpf/App.xaml.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Data;
-using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Threading.Tasks;

src/livelywpf/livelywpf/Core/Display/LivelyScreen.cs

@@ -24,7 +24,7 @@ public class LivelyScreen
         public LivelyScreen(string DeviceId, string DeviceName, int BitsPerPixel, Rectangle Bounds, Rectangle WorkingArea)
         {
             //Backward compatibility: lively < v1.1.9 does not have DeviceId.
-            this.DeviceId = DeviceId ?? (ScreenHelper.GetScreen().FirstOrDefault(x => x.Bounds == Bounds)?.DeviceId);
+            this.DeviceId = DeviceId ?? (ScreenHelper.GetScreen().FirstOrDefault(x => x.Bounds == Bounds)?.DeviceId); 
             this.DeviceName = DeviceName;
             this.DeviceNumber = ScreenHelper.GetScreenNumber(DeviceName);
             this.BitsPerPixel = BitsPerPixel;

src/livelywpf/livelywpf/Core/Playback/Playback.cs

@@ -46,6 +46,7 @@ public static PlaybackState WallpaperPlaybackState
         private readonly DispatcherTimer dispatcherTimer = new DispatcherTimer();
         private bool _isLockScreen, _isRemoteSession;
         private bool disposedValue;
+        private int livelyPid = 0;
 
         public Playback()
         {
@@ -69,6 +70,18 @@ private void Initialize()
             InitializeTimer();
             WallpaperPlaybackState = PlaybackState.play;
 
+            try
+            {
+                using (Process process = Process.GetCurrentProcess())
+                {
+                    livelyPid = process.Id;
+                }
+            }
+            catch (Exception e)
+            {
+                Logger.Error("Failed to retrieve Lively Pid:" + e.Message);
+            }
+
             // Check if already in remote/lockscreen session.
             _isRemoteSession = System.Windows.Forms.SystemInformation.TerminalServerSession;
             if (_isRemoteSession)
@@ -187,10 +200,7 @@ private void ForegroundAppMonitor()
                         return;
                     }
 
-                    if (fProcess.ProcessName.Equals("livelywpf", StringComparison.OrdinalIgnoreCase) ||
-                        fProcess.ProcessName.Equals("livelycefsharp", StringComparison.OrdinalIgnoreCase) ||
-                        fProcess.ProcessName.Equals("libvlcplayer", StringComparison.OrdinalIgnoreCase) ||
-                        fProcess.ProcessName.Equals("libmpvplayer", StringComparison.OrdinalIgnoreCase))
+                    if (fProcess.Id == livelyPid || IsLivelyPlugin(fProcess.Id))
                     {
                         PlayWallpapers();
                         SetWallpaperVolume(Program.SettingsVM.Settings.AudioVolumeGlobal);
@@ -401,6 +411,11 @@ private static void SetWallpaperVolume(int volume, LivelyScreen display)
             });
         }
 
+        private static bool IsLivelyPlugin(int pid)
+        {
+            return SetupDesktop.Wallpapers.Exists(x => x.GetProcess() != null && x.GetProcess().Id == pid);
+        }
+
         /// <summary>
         /// Checks if hWnd window size is >95% for its running screen.
         /// </summary>

src/livelywpf/livelywpf/Core/Wallpapers/VideoMpvPlayer.cs

@@ -24,15 +24,13 @@ public class VideoMpvPlayer : IWallpaper
         Process Proc { get; set; }
         LibraryModel Model { get; set; }
         LivelyScreen Display { get; set; }
-        public UInt32 SuspendCnt { get; set; }
         private readonly CancellationTokenSource ctsProcessWait = new CancellationTokenSource();
         private Task processWaitTask;
         private readonly int timeOut;
         private readonly string ipcServerName;
         JObject livelyPropertiesData;
         string LivelyPropertyCopy { get; set; }
 
-        //todo: yt-dl support.
         public VideoMpvPlayer(string path, LibraryModel model, LivelyScreen display,
             WallpaperScaler scaler = WallpaperScaler.fill, StreamQualitySuggestion streamQuality = StreamQualitySuggestion.Highest)
         {
@@ -84,24 +82,25 @@ public VideoMpvPlayer(string path, LibraryModel model, LivelyScreen display,
 
             ipcServerName = "mpvsocket" + Path.GetRandomFileName();
             string cmdArgs = 
-                //always create gui window
-                "--force-window=yes " +
+                "--volume=0 " +
                 //alternative: --loop-file=inf
                 "--loop-file " +
                 //do not close after media end
                 "--keep-open " +
-                //gpu decode preferred
-                "--hwdec=auto " + 
+                //always create gui window
+                "--force-window=yes " +
+                //open window at (-9999,0)
+                "--geometry=-9999:0 " +
                 //allow screensaver
                 "--stop-screensaver=no " +
-                //open window at (-9999,0)
-                "--geometry=-9999:0 " + 
                 //alternative: --input-ipc-server=\\.\pipe\
                 "--input-ipc-server=" + ipcServerName + " " +
                 //stretch algorithm
                 scalerArg + " " +
                 //integer scaler for sharpness
-                (model.LivelyInfo.Type == WallpaperType.gif ? "--scale=nearest " : " ") + 
+                (model.LivelyInfo.Type == WallpaperType.gif ? "--scale=nearest " : " ") +
+                //gpu decode preference
+                (Program.SettingsVM.Settings.VideoPlayerHwAccel ? "--hwdec=auto " : "--hwdec=no ") +
                 //file, stream path
                 (model.LivelyInfo.Type == WallpaperType.videostream ? Helpers.StreamHelper.YoutubeDLMpvArgGenerate(streamQuality, path) : "\"" + path + "\"");
 
@@ -122,7 +121,6 @@ public VideoMpvPlayer(string path, LibraryModel model, LivelyScreen display,
             this.Model = model;
             this.Display = display;
             this.timeOut = 20000;
-            SuspendCnt = 0;
         }
 
         public async void Close()