C# PlayableItem类代码示例

        /// <summary>
        /// Gets arguments to be passed to the command line.
        /// http://wiki.videolan.org/VLC_command-line_help
        /// </summary>
        protected override List<string> GetCommandArgumentsList(PlayableItem playInfo)
        {
            List<string> args = new List<string>();

            args.Add("{0}");

            // Be explicit about start time, to avoid any possible player auto-resume settings
            double startTimeInSeconds = new TimeSpan(playInfo.StartPositionTicks).TotalSeconds;

            args.Add("--start-time=" + startTimeInSeconds);

            // Play in fullscreen
            args.Add("--fullscreen");
            // Keep the window on top of others
            args.Add("--video-on-top");
            // Start a new instance
            args.Add("--no-one-instance");
            // Close the player when playback finishes
            args.Add("--play-and-exit");
            // Disable system screen saver during playback
            args.Add("--disable-screensaver");

            // Keep the ui minimal
            args.Add("--qt-minimal-view");
            args.Add("--no-video-deco");
            args.Add("--no-playlist-tree");

            // OSD marquee font
            args.Add("--freetype-outline-thickness=6");

            // Startup the Http interface so we can send out requests to monitor playstate
            args.Add("--extraintf=http");
            args.Add("--http-host=" + HttpServer);
            args.Add("--http-port=" + HttpPort);

            // Disable the new version notification for this session
            args.Add("--no-qt-updates-notif");

            // Map the stop button on the remote to close the player
            args.Add("--global-key-quit=\"Media Stop\"");

            args.Add("--global-key-play=\"Media Play\"");
            args.Add("--global-key-pause=\"Media Pause\"");
            args.Add("--global-key-play-pause=\"Media Play Pause\"");

            args.Add("--global-key-vol-down=\"Volume Down\"");
            args.Add("--global-key-vol-up=\"Volume Up\"");
            args.Add("--global-key-vol-mute=\"Mute\"");

            args.Add("--key-nav-up=\"Up\"");
            args.Add("--key-nav-down=\"Down\"");
            args.Add("--key-nav-left=\"Left\"");
            args.Add("--key-nav-right=\"Right\"");
            args.Add("--key-nav-activate=\"Enter\"");

            args.Add("--global-key-jump-long=\"Media Prev Track\"");
            args.Add("--global-key-jump+long=\"Media Next Track\"");

            return args;
        }

        /// <summary>
        /// Gets arguments to be passed to the command line.
        /// </summary>
        protected override List<string> GetCommandArgumentsList(PlayableItem playbackInfo)
        {
            List<string> args = new List<string>();

            args.Add("uri={0}");

            return args;
        }

        protected override void OnExternalPlayerLaunched(PlayableItem playbackInfo)
        {
            base.OnExternalPlayerLaunched(playbackInfo);

            // If the playstate directory exists, start watching it
            if (Directory.Exists(PlayStateDirectory))
            {
                StartWatchingStatusFile();
            }
        }

 /// <summary>
 /// Plays Media
 /// </summary>
 protected override void PlayMediaInternal(PlayableItem playable)
 {
     if (playable.QueueItem)
     {
         Application.UIDeferredInvokeIfRequired(() => QueuePlayableItem(playable));
     }
     else
     {
         Application.UIDeferredInvokeIfRequired(() => PlayPlayableItem(playable));
     }
 }

 /// <summary>
 /// Plays Media
 /// </summary>
 protected override void PlayMediaInternal(PlayableItem playable)
 {
     if (playable.QueueItem)
     {
         Microsoft.MediaCenter.UI.Application.DeferredInvoke(_ => QueuePlayableItem(playable));
     }
     else
     {
         Microsoft.MediaCenter.UI.Application.DeferredInvoke(_ => PlayPlayableItem(playable));
     }
 }

        protected override void PlayMediaInternal(PlayableItem playable)
        {
            // Report start to server
            if (playable.HasMediaItems) Application.CurrentInstance.ReportPlaybackStart(playable.CurrentMedia.ApiId);

            // Two different launch methods depending on how the player is configured
            if (LaunchType == CommonConfigData.ExternalPlayerLaunchType.WMCNavigate)
            {
                PlayUsingWMCNavigation(playable);

                OnExternalPlayerLaunched(playable);
            }
            else
            {
                PlayUsingCommandLine(playable);
            }
        }

        /// <summary>
        /// Starts monitoring playstate using the player's Http interface
        /// </summary>
        protected override void OnExternalPlayerLaunched(PlayableItem playbackInfo)
        {
            base.OnExternalPlayerLaunched(playbackInfo);

            if (_StatusRequestClient == null)
            {
                _StatusRequestClient = new WebClient();

                // Start up the thread that will perform the monitoring
                _StatusRequestThread = new Thread(MonitorStatus);
                _StatusRequestThread.IsBackground = true;
                _StatusRequestThread.Start();
            }

            _StatusRequestClient.DownloadStringCompleted -= statusRequestCompleted;
            _StatusRequestClient.DownloadStringCompleted += statusRequestCompleted;
            
            _MonitorPlayback = true;
        }

        protected override void PlayMediaInternal(PlayableItem playable)
        {
            // Report start to server
            var file = (playable.HasMediaItems ? playable.CurrentMedia.Files.FirstOrDefault() : playable.CurrentFile) ?? "";
            IsStreaming = file.StartsWith("http://", StringComparison.OrdinalIgnoreCase);
            if (playable.HasMediaItems) Application.CurrentInstance.ReportPlaybackStart(playable.CurrentMedia.ApiId, IsStreaming);

            // Two different launch methods depending on how the player is configured
            if (LaunchType == CommonConfigData.ExternalPlayerLaunchType.WMCNavigate)
            {
                PlayUsingWMCNavigation(playable);

                OnExternalPlayerLaunched(playable);
            }
            else
            {
                PlayUsingCommandLine(playable);
            }

        }

 private void QueuePlayableItemIntoMediaCollection(PlayableItem playable)
 {
     try
     {
         // Create a MediaCollectionItem for each file to play
         if (playable.HasMediaItems)
         {
             PlaybackControllerHelper.PopulateMediaCollectionUsingMediaItems(this, _CurrentMediaCollection, playable);
         }
         else
         {
             PlaybackControllerHelper.PopulateMediaCollectionUsingFiles(_CurrentMediaCollection, playable);
         }
     }
     catch (Exception ex)
     {
         OnErrorPlayingItem(playable, ex);
     }
 }

        /// <summary>
        /// Calls PlayMedia
        /// </summary>
        private bool CallPlayMediaLegacy(MediaCenterEnvironment mediaCenterEnvironment, PlayableItem playable)
        {
            Microsoft.MediaCenter.MediaType type = PlaybackControllerHelper.GetMediaType(playable);

            bool playedWithPlaylist = false;

            // Need to create a playlist
            if (PlaybackControllerHelper.RequiresWPL(playable))
            {
                IEnumerable<string> files = playable.FilesFormattedForPlayer;

                string playlistFile = PlaybackControllerHelper.CreateWPLPlaylist(playable.Id.ToString(), files, playable.StartPlaylistPosition);

                if (!PlaybackControllerHelper.CallPlayMedia(mediaCenterEnvironment, type, playlistFile, false))
                {
                    return false;
                }

                playedWithPlaylist = true;
            }

            // If we're playing a dvd and the last item played was a MediaCollection, we need to make sure the MediaCollection has
            // fully cleared out of the player or there will be quirks such as ff/rew remote buttons not working
            if (playable.HasMediaItems)
            {
                Video video = playable.MediaItems.First() as Video;

                Microsoft.MediaCenter.Extensibility.MediaType lastMediaType = PlaybackControllerHelper.GetCurrentMediaType();

                if (video != null && video.MediaType == Library.MediaType.DVD && (lastMediaType == Microsoft.MediaCenter.Extensibility.MediaType.MediaCollection || lastMediaType == Microsoft.MediaCenter.Extensibility.MediaType.Unknown))
                {
                    System.Threading.Thread.Sleep(500);
                }
            }

            if (!playedWithPlaylist)
            {
                bool queue = false;

                foreach (string fileToPlay in playable.FilesFormattedForPlayer)
                {
                    if (!PlaybackControllerHelper.CallPlayMedia(mediaCenterEnvironment, type, fileToPlay, queue))
                    {
                        return false;
                    }

                    queue = true;
                }
            }

            return true;
        }

 /// <summary>
 /// Calls PlayMedia using either a MediaCollection or a single file
 /// </summary>
 private bool CallPlayMediaForPlayableItem(MediaCenterEnvironment mediaCenterEnvironment, PlayableItem playable)
 {
     if (PlaybackControllerHelper.UseLegacyApi(playable))
     {
         bool success = CallPlayMediaLegacy(mediaCenterEnvironment, playable);
         _CurrentMediaCollection = null;
         return success;
     }
     else
     {
         return CallPlayMediaUsingMediaCollection(mediaCenterEnvironment, playable);
     }
 }

        private void ManageExtPlayer(Process player, PlayableItem playable)
        {
            //minimize MCE if indicated
            IntPtr mceWnd = FindWindow(null, "Windows Media Center");
            WINDOWPLACEMENT wp = new WINDOWPLACEMENT();
            GetWindowPlacement(mceWnd, ref wp);

            Cursor.Hide();

            if (HideTaskbar)
            {
                Taskbar.Hide();
            }

            if (ShowSplashScreen)
            {
                //throw up a form to cover the desktop if we minimize and we are in the primary monitor
                if (System.Windows.Forms.Screen.FromHandle(mceWnd).Primary)
                {
                    ExternalSplashForm.Display(Application.CurrentInstance.ExtSplashBmp);
                }
            }

            if (MinimizeMCE)
            {
                Logger.ReportVerbose("Minimizing Windows Media Center");
                wp.showCmd = 2; // 1 - Normal; 2 - Minimize; 3 - Maximize;
                SetWindowPlacement(mceWnd, ref wp);
            }

            // async this so it doesn't slow us down if the service isn't responding for some reason
            Async.Queue("Wait for external player to launch", () =>
            {
                player.Refresh();
                player.WaitForInputIdle(5000);
                OnExternalPlayerLaunched(playable);
            });

            //and wait for it to exit
            player.WaitForExit();

            player.Dispose();

            //now restore MCE
            wp.showCmd = 1; // 1 - Normal; 2 - Minimize; 3 - Maximize;
            SetWindowPlacement(mceWnd, ref wp);

            if (ShowSplashScreen)
            {
                ExternalSplashForm.Hide();
            }

            if (HideTaskbar)
            {
                Taskbar.Show();
            }

            Cursor.Show();

            SetForegroundWindow(mceWnd);

            OnPlaybackFinished(GetFinishedPlaybackState());
        }

        private string GetCommandArguments(PlayableItem playable)
        {
            List<string> argsList = GetCommandArgumentsList(playable);

            string args = string.Join(" ", argsList.ToArray());

            args = string.Format(args, GetFilePathCommandArgument(GetFilesToSendToPlayer(playable)));

            return args;
        }

        protected override void OnExternalPlayerLaunched(PlayableItem playbackInfo)
        {
            base.OnExternalPlayerLaunched(playbackInfo);

            Async.Queue("Wait for process to exit", WaitForProcessToExit);
        }

        /// <summary>
        /// Gets arguments to be passed to the command line.
        /// </summary>
        protected override List<string> GetCommandArgumentsList(PlayableItem playbackInfo)
        {
            var args = new List<string> {"uri={0}"};

            return args;
        }