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using System.Linq;
using System;
using System.Threading;
using System.Collections.Generic;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Session;
using MediaBrowser.Model.Session;
using MediaBrowser.Model.SyncPlay;
namespace MediaBrowser.Controller.SyncPlay
{
/// <summary>
/// Class PlayingGroupState.
/// </summary>
/// <remarks>
/// Class is not thread-safe, external locking is required when accessing methods.
/// </remarks>
public class PlayingGroupState : SyncPlayAbstractState
{
/// <inheritdoc />
public override GroupState GetGroupState()
{
return GroupState.Playing;
}
/// <inheritdoc />
public override bool HandleRequest(ISyncPlayStateContext context, bool newState, PlayGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
GroupInfo group = context.GetGroup();
if (newState)
{
// Pick a suitable time that accounts for latency
var delay = Math.Max(group.GetHighestPing() * 2, group.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
group.LastActivity = DateTime.UtcNow.AddMilliseconds(
delay
);
var command = context.NewSyncPlayCommand(SendCommandType.Play);
context.SendCommand(session, SyncPlayBroadcastType.AllGroup, command, cancellationToken);
}
else
{
// Client got lost, sending current state
var command = context.NewSyncPlayCommand(SendCommandType.Play);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
}
return true;
}
/// <inheritdoc />
public override bool HandleRequest(ISyncPlayStateContext context, bool newState, PauseGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
// Change state
var pausedState = new PausedGroupState();
context.SetState(pausedState);
return pausedState.HandleRequest(context, true, request, session, cancellationToken);
}
/// <inheritdoc />
public override bool HandleRequest(ISyncPlayStateContext context, bool newState, SeekGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
// Change state
var pausedState = new PausedGroupState();
context.SetState(pausedState);
return pausedState.HandleRequest(context, true, request, session, cancellationToken);
}
/// <inheritdoc />
public override bool HandleRequest(ISyncPlayStateContext context, bool newState, BufferGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
// Change state
var pausedState = new PausedGroupState();
context.SetState(pausedState);
return pausedState.HandleRequest(context, true, request, session, cancellationToken);
}
/// <inheritdoc />
public override bool HandleRequest(ISyncPlayStateContext context, bool newState, ReadyGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
// Group was not waiting, make sure client has latest state
var command = context.NewSyncPlayCommand(SendCommandType.Play);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
return true;
}
}
}
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