/// <summary>
/// Calls the execution of the given command instance
/// and wait for its completion without blocking the dispatcher
/// </summary>
/// <param name="command">The command.</param>
private void ExecuteAndWaitFor(MediaCommand command)
{
var executeTask = Task.Run(() =>
{
if (command.HasCompleted)
{
return;
}
command.Execute();
});
var waitTask = Task.Run(async() =>
{
while (command.HasCompleted == false)
{
await Task.Delay(10);
}
});
while (waitTask.IsCompleted == false)
{
// Pump invoke
Dispatcher.CurrentDispatcher.Invoke(
DispatcherPriority.Background,
new Action(() => { }));
}
}
/// <summary>
/// Enqueues the command for execution.
/// </summary>
/// <param name="command">The command.</param>
private void EnqueueCommand(MediaCommand command)
{
if (MediaElement.IsOpen == false)
{
command.Complete();
return;
}
lock (SyncLock)
Commands.Add(command);
}
/// <summary>
/// Processes the next command in the command queue.
/// This method is called in every block rendering cycle.
/// </summary>
public void ProcessNext()
{
MediaCommand command = null;
lock (SyncLock)
{
if (Commands.Count == 0)
{
return;
}
command = Commands[0];
Commands.RemoveAt(0);
}
command.Execute();
}
/// <summary>
/// Waits for the command to complete execution.
/// </summary>
/// <param name="command">The command.</param>
private void WaitFor(MediaCommand command)
{
var waitTask = Task.Run(async() =>
{
while (command.HasCompleted == false && MediaElement.IsOpen)
{
await Task.Delay(10);
}
});
while (waitTask.IsCompleted == false)
{
// Pump invoke
Dispatcher.CurrentDispatcher.Invoke(
DispatcherPriority.Background,
new Action(() => { }));
}
}
