public override void HandleRequest(SeekGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Save state if first event.
if (!InitialStateSet)
{
InitialState = prevState;
InitialStateSet = true;
}
if (prevState.Equals(GroupStateType.Playing))
{
ResumePlaying = true;
}
else if (prevState.Equals(GroupStateType.Paused))
{
ResumePlaying = false;
}
// Sanitize PositionTicks.
var ticks = context.SanitizePositionTicks(request.PositionTicks);
// Seek.
context.PositionTicks = ticks;
context.LastActivity = DateTime.UtcNow;
var command = context.NewSyncPlayCommand(SendCommandType.Seek);
context.SendCommand(session, SyncPlayBroadcastType.AllGroup, command, cancellationToken);
// Reset status of sessions and await for all Ready events.
context.SetAllBuffering(true);
// Notify relevant state change event.
SendGroupStateUpdate(context, request, session, cancellationToken);
}
public override void HandleRequest(ReadyGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
if (prevState.Equals(Type))
{
// Group was not waiting, make sure client has latest state.
var command = context.NewSyncPlayCommand(SendCommandType.Unpause);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
}
else if (prevState.Equals(GroupStateType.Waiting))
{
// Notify relevant state change event.
SendGroupStateUpdate(context, request, session, cancellationToken);
}
}
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);
}
}
public override void HandleRequest(UnpauseGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
if (!prevState.Equals(Type))
{
// Pick a suitable time that accounts for latency.
var delayMillis = Math.Max(context.GetHighestPing() * 2, context.DefaultPing);
// Unpause group and set starting point in future.
// Clients will start playback at LastActivity (datetime) from PositionTicks (playback position).
// The added delay does not guarantee, of course, that the command will be received in time.
// Playback synchronization will mainly happen client side.
context.LastActivity = DateTime.UtcNow.AddMilliseconds(delayMillis);
var command = context.NewSyncPlayCommand(SendCommandType.Unpause);
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.Unpause);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
}
}
public override void HandleRequest(ReadyGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
if (prevState.Equals(Type))
{
// Client got lost, sending current state.
var command = context.NewSyncPlayCommand(SendCommandType.Pause);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
}
else if (prevState.Equals(GroupStateType.Waiting))
{
// Sending current state to all clients.
var command = context.NewSyncPlayCommand(SendCommandType.Pause);
context.SendCommand(session, SyncPlayBroadcastType.AllGroup, command, cancellationToken);
// Notify relevant state change event.
SendGroupStateUpdate(context, request, session, cancellationToken);
}
}
private void SendStopCommand(IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
var command = context.NewSyncPlayCommand(SendCommandType.Stop);
if (!prevState.Equals(Type))
{
context.SendCommand(session, SyncPlayBroadcastType.AllGroup, command, cancellationToken);
}
else
{
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
}
}
public override void HandleRequest(UnpauseGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Save state if first event.
if (!InitialStateSet)
{
InitialState = prevState;
InitialStateSet = true;
}
if (prevState.Equals(GroupStateType.Idle))
{
ResumePlaying = true;
context.RestartCurrentItem();
var playQueueUpdate = context.GetPlayQueueUpdate(PlayQueueUpdateReason.NewPlaylist);
var update = context.NewSyncPlayGroupUpdate(GroupUpdateType.PlayQueue, playQueueUpdate);
context.SendGroupUpdate(session, SyncPlayBroadcastType.AllGroup, update, cancellationToken);
// Reset status of sessions and await for all Ready events.
context.SetAllBuffering(true);
_logger.LogDebug("Group {GroupId} is waiting for all ready events.", context.GroupId.ToString());
}
else
{
if (ResumePlaying)
{
_logger.LogDebug("Forcing the playback to start in group {GroupId}. Group-wait is disabled until next state change.", context.GroupId.ToString());
// An Unpause request is forcing the playback to start, ignoring sessions that are not ready.
context.SetAllBuffering(false);
// Change state.
var playingState = new PlayingGroupState(LoggerFactory)
{
IgnoreBuffering = true
};
context.SetState(playingState);
playingState.HandleRequest(request, context, Type, session, cancellationToken);
}
else
{
// Group would have gone to paused state, now will go to playing state when ready.
ResumePlaying = true;
// Notify relevant state change event.
SendGroupStateUpdate(context, request, session, cancellationToken);
}
}
}
public override void SessionJoined(IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Save state if first event.
if (!InitialStateSet)
{
InitialState = prevState;
InitialStateSet = true;
}
if (prevState.Equals(GroupStateType.Playing))
{
ResumePlaying = true;
// 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);
}
// Prepare new session.
var playQueueUpdate = context.GetPlayQueueUpdate(PlayQueueUpdateReason.NewPlaylist);
var update = context.NewSyncPlayGroupUpdate(GroupUpdateType.PlayQueue, playQueueUpdate);
context.SendGroupUpdate(session, SyncPlayBroadcastType.CurrentSession, update, cancellationToken);
context.SetBuffering(session, true);
// Send pause command to all non-buffering sessions.
var command = context.NewSyncPlayCommand(SendCommandType.Pause);
context.SendCommand(session, SyncPlayBroadcastType.AllReady, command, cancellationToken);
}
public override void HandleRequest(BufferGroupRequest 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 updateSession = context.NewSyncPlayGroupUpdate(GroupUpdateType.PlayQueue, playQueueUpdate);
context.SendGroupUpdate(session, SyncPlayBroadcastType.CurrentSession, updateSession, cancellationToken);
context.SetBuffering(session, true);
return;
}
if (prevState.Equals(GroupStateType.Playing))
{
// Resume playback when all ready.
ResumePlaying = true;
context.SetBuffering(session, true);
// 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);
// Send pause command to all non-buffering sessions.
var command = context.NewSyncPlayCommand(SendCommandType.Pause);
context.SendCommand(session, SyncPlayBroadcastType.AllReady, command, cancellationToken);
}
else if (prevState.Equals(GroupStateType.Paused))
{
// Don't resume playback when all ready.
ResumePlaying = false;
context.SetBuffering(session, true);
// Send pause command to buffering session.
var command = context.NewSyncPlayCommand(SendCommandType.Pause);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
}
else if (prevState.Equals(GroupStateType.Waiting))
{
// Another session is now buffering.
context.SetBuffering(session, true);
if (!ResumePlaying)
{
// Force update for this session that should be paused.
var command = context.NewSyncPlayCommand(SendCommandType.Pause);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
}
}
// Notify relevant state change event.
SendGroupStateUpdate(context, request, session, cancellationToken);
}