Esempio n. 1
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        public override void HandleRequest(PauseGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
        {
            if (!prevState.Equals(Type))
            {
                // Pause group and compute the media playback position.
                var currentTime = DateTime.UtcNow;
                var elapsedTime = currentTime - context.LastActivity;
                context.LastActivity = currentTime;
                // Elapsed time is negative if event happens
                // during the delay added to account for latency.
                // In this phase clients haven't started the playback yet.
                // In other words, LastActivity is in the future,
                // when playback unpause is supposed to happen.
                // Seek only if playback actually started.
                context.PositionTicks += Math.Max(elapsedTime.Ticks, 0);

                var command = context.NewSyncPlayCommand(SendCommandType.Pause);
                context.SendCommand(session, SyncPlayBroadcastType.AllGroup, command, cancellationToken);

                // Notify relevant state change event.
                SendGroupStateUpdate(context, request, session, cancellationToken);
            }
            else
            {
                // Client got lost, sending current state.
                var command = context.NewSyncPlayCommand(SendCommandType.Pause);
                context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
            }
        }
Esempio n. 2
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        public ActionResult SyncPlayPause()
        {
            var currentSession  = RequestHelpers.GetSession(_sessionManager, _authorizationContext, Request);
            var syncPlayRequest = new PauseGroupRequest();

            _syncPlayManager.HandleRequest(currentSession, syncPlayRequest, CancellationToken.None);
            return(NoContent());
        }
Esempio n. 3
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        public override void HandleRequest(PauseGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
        {
            // Change state.
            var pausedState = new PausedGroupState(LoggerFactory);

            context.SetState(pausedState);
            pausedState.HandleRequest(request, context, Type, session, cancellationToken);
        }
        public async Task <ActionResult> SyncPlayPause()
        {
            var currentSession = await RequestHelpers.GetSession(_sessionManager, _authorizationContext, Request).ConfigureAwait(false);

            var syncPlayRequest = new PauseGroupRequest();

            _syncPlayManager.HandleRequest(currentSession, syncPlayRequest, CancellationToken.None);
            return(NoContent());
        }
Esempio n. 5
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        public override void HandleRequest(PauseGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
        {
            // Save state if first event.
            if (!InitialStateSet)
            {
                InitialState    = prevState;
                InitialStateSet = true;
            }

            // Wait for sessions to be ready, then switch to paused state.
            ResumePlaying = false;

            // Notify relevant state change event.
            SendGroupStateUpdate(context, request, session, cancellationToken);
        }
Esempio n. 6
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 public virtual void HandleRequest(PauseGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
 {
     UnhandledRequest(request);
 }
Esempio n. 7
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        public override void HandleRequest(ReadyGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
        {
            // Save state if first event.
            if (!InitialStateSet)
            {
                InitialState    = prevState;
                InitialStateSet = true;
            }

            // Make sure the client is playing the correct item.
            if (!request.PlaylistItemId.Equals(context.PlayQueue.GetPlayingItemPlaylistId()))
            {
                _logger.LogDebug("Session {SessionId} reported wrong playlist item in group {GroupId}.", session.Id, context.GroupId.ToString());

                var playQueueUpdate = context.GetPlayQueueUpdate(PlayQueueUpdateReason.SetCurrentItem);
                var update          = context.NewSyncPlayGroupUpdate(GroupUpdateType.PlayQueue, playQueueUpdate);
                context.SendGroupUpdate(session, SyncPlayBroadcastType.CurrentSession, update, cancellationToken);
                context.SetBuffering(session, true);

                return;
            }

            // Compute elapsed time between the client reported time and now.
            // Elapsed time is used to estimate the client position when playback is unpaused.
            // Ideally, the request is received and handled without major delays.
            // However, to avoid waiting indefinitely when a client is not reporting a correct time,
            // the elapsed time is ignored after a certain threshold.
            var currentTime            = DateTime.UtcNow;
            var elapsedTime            = currentTime.Subtract(request.When);
            var timeSyncThresholdTicks = TimeSpan.FromMilliseconds(context.TimeSyncOffset).Ticks;

            if (Math.Abs(elapsedTime.Ticks) > timeSyncThresholdTicks)
            {
                _logger.LogWarning("Session {SessionId} is not time syncing properly. Ignoring elapsed time.", session.Id);

                elapsedTime = TimeSpan.Zero;
            }

            // Ignore elapsed time if client is paused.
            if (!request.IsPlaying)
            {
                elapsedTime = TimeSpan.Zero;
            }

            var requestTicks           = context.SanitizePositionTicks(request.PositionTicks);
            var clientPosition         = TimeSpan.FromTicks(requestTicks) + elapsedTime;
            var delayTicks             = context.PositionTicks - clientPosition.Ticks;
            var maxPlaybackOffsetTicks = TimeSpan.FromMilliseconds(context.MaxPlaybackOffset).Ticks;

            _logger.LogDebug("Session {SessionId} is at {PositionTicks} (delay of {Delay} seconds) in group {GroupId}.", session.Id, clientPosition, TimeSpan.FromTicks(delayTicks).TotalSeconds, context.GroupId.ToString());

            if (ResumePlaying)
            {
                // Handle case where session reported as ready but in reality
                // it has no clue of the real position nor the playback state.
                if (!request.IsPlaying && Math.Abs(delayTicks) > maxPlaybackOffsetTicks)
                {
                    // Session not ready at all.
                    context.SetBuffering(session, true);

                    // Correcting session's position.
                    var command = context.NewSyncPlayCommand(SendCommandType.Seek);
                    context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);

                    // Notify relevant state change event.
                    SendGroupStateUpdate(context, request, session, cancellationToken);

                    _logger.LogWarning("Session {SessionId} got lost in time, correcting.", session.Id);
                    return;
                }

                // Session is ready.
                context.SetBuffering(session, false);

                if (context.IsBuffering())
                {
                    // Others are still buffering, tell this client to pause when ready.
                    var command = context.NewSyncPlayCommand(SendCommandType.Pause);
                    command.When = currentTime.AddTicks(delayTicks);
                    context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);

                    _logger.LogInformation("Session {SessionId} will pause when ready in {Delay} seconds. Group {GroupId} is waiting for all ready events.", session.Id, TimeSpan.FromTicks(delayTicks).TotalSeconds, context.GroupId.ToString());
                }
                else
                {
                    // If all ready, then start playback.
                    // Let other clients resume as soon as the buffering client catches up.
                    if (delayTicks > context.GetHighestPing() * 2 * TimeSpan.TicksPerMillisecond)
                    {
                        // Client that was buffering is recovering, notifying others to resume.
                        context.LastActivity = currentTime.AddTicks(delayTicks);
                        var command = context.NewSyncPlayCommand(SendCommandType.Unpause);
                        var filter  = SyncPlayBroadcastType.AllExceptCurrentSession;
                        if (!request.IsPlaying)
                        {
                            filter = SyncPlayBroadcastType.AllGroup;
                        }

                        context.SendCommand(session, filter, command, cancellationToken);

                        _logger.LogInformation("Session {SessionId} is recovering, group {GroupId} will resume in {Delay} seconds.", session.Id, context.GroupId.ToString(), TimeSpan.FromTicks(delayTicks).TotalSeconds);
                    }
                    else
                    {
                        // Client, that was buffering, resumed playback but did not update others in time.
                        delayTicks = context.GetHighestPing() * 2 * TimeSpan.TicksPerMillisecond;
                        delayTicks = Math.Max(delayTicks, context.DefaultPing);

                        context.LastActivity = currentTime.AddTicks(delayTicks);

                        var command = context.NewSyncPlayCommand(SendCommandType.Unpause);
                        context.SendCommand(session, SyncPlayBroadcastType.AllGroup, command, cancellationToken);

                        _logger.LogWarning("Session {SessionId} resumed playback, group {GroupId} has {Delay} seconds to recover.", session.Id, context.GroupId.ToString(), TimeSpan.FromTicks(delayTicks).TotalSeconds);
                    }

                    // Change state.
                    var playingState = new PlayingGroupState(LoggerFactory);
                    context.SetState(playingState);
                    playingState.HandleRequest(request, context, Type, session, cancellationToken);
                }
            }
            else
            {
                // Check that session is really ready, tolerate player imperfections under a certain threshold.
                if (Math.Abs(context.PositionTicks - requestTicks) > maxPlaybackOffsetTicks)
                {
                    // Session still not ready.
                    context.SetBuffering(session, true);
                    // Session is seeking to wrong position, correcting.
                    var command = context.NewSyncPlayCommand(SendCommandType.Seek);
                    context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);

                    // Notify relevant state change event.
                    SendGroupStateUpdate(context, request, session, cancellationToken);

                    _logger.LogWarning("Session {SessionId} is seeking to wrong position, correcting.", session.Id);
                    return;
                }
                else
                {
                    // Session is ready.
                    context.SetBuffering(session, false);
                }

                if (!context.IsBuffering())
                {
                    _logger.LogDebug("Session {SessionId} is ready, group {GroupId} is ready.", session.Id, context.GroupId.ToString());

                    // Group is ready, returning to previous state.
                    var pausedState = new PausedGroupState(LoggerFactory);
                    context.SetState(pausedState);

                    if (InitialState.Equals(GroupStateType.Playing))
                    {
                        // Group went from playing to waiting state and a pause request occured while waiting.
                        var pauseRequest = new PauseGroupRequest();
                        pausedState.HandleRequest(pauseRequest, context, Type, session, cancellationToken);
                    }
                    else if (InitialState.Equals(GroupStateType.Paused))
                    {
                        pausedState.HandleRequest(request, context, Type, session, cancellationToken);
                    }
                }
            }
        }
Esempio n. 8
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 public override void HandleRequest(PauseGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
 {
     SendStopCommand(context, prevState, session, cancellationToken);
 }