/// <summary>
/// Opens the specified URI.
/// The command is processed in a Thread Pool Thread.
/// </summary>
/// <param name="uri">The URI.</param>
/// <returns>The awaitable Open operation</returns>
public DispatcherOperation Open(Uri uri)
{
// Check Uri Argument
if (uri == null)
{
MediaElement?.Logger.Log(
MediaLogMessageType.Warning,
$"{nameof(MediaCommandManager)}.{nameof(Open)}: '{nameof(uri)}' cannot be null");
return(Dispatcher.CurrentDispatcher.CreatePumpOperation());
}
if (CanExecuteCommands == false)
{
return(Dispatcher.CurrentDispatcher.CreatePumpOperation());
}
else
{
IsOpening.Value = true;
}
var command = new OpenCommand(this, uri);
ExecutingCommand = command;
ClearCommandQueue();
var backgroundTask = Task.Run(() =>
{
try
{
if (command.HasCompleted)
{
return;
}
command.Execute();
}
catch (Exception ex)
{
MediaElement?.Logger.Log(
MediaLogMessageType.Error,
$"{nameof(MediaCommandManager)}.{nameof(Open)}: {ex.GetType()} - {ex.Message}");
}
finally
{
ExecutingCommand?.Complete();
ExecutingCommand = null;
IsOpening.Value = false;
}
System.Diagnostics.Debug.Assert(
MediaElement.IsOpen == true && MediaElement.IsOpening == false && command.HasCompleted,
"Synchronous conditions not met");
});
var operation = Dispatcher.CurrentDispatcher.CreateAsynchronousPumpWaiter(backgroundTask);
return(operation);
}
/// <summary>
/// Opens the specified URI.
/// </summary>
/// <param name="uri">The URI.</param>
/// <returns></returns>
public async Task Open(Uri uri)
{
lock (SyncLock)
{
Commands.Clear();
}
var command = new OpenCommand(this, uri);
await command.ExecuteAsync();
}
/// <summary>
/// Opens the specified URI.
/// This command gets processed in a threadpool thread asynchronously.
/// </summary>
/// <param name="uri">The URI.</param>
/// <returns>The asynchronous task</returns>
public async Task OpenAsync(Uri uri)
{
// Check Uri Argument
if (uri == null)
{
MediaCore?.Log(
MediaLogMessageType.Warning,
$"{nameof(MediaCommandManager)}.{nameof(OpenAsync)}: '{nameof(uri)}' cannot be null");
return; // Task.CompletedTask;
}
if (CanExecuteCommands == false)
{
return; // Task.CompletedTask;
}
else
{
IsOpening.Value = true;
}
var command = new OpenCommand(this, uri);
ExecutingCommand = command;
ClearCommandQueue();
var action = new Action(() =>
{
try
{
if (command.HasCompleted)
{
return;
}
command.RunSynchronously();
}
catch (Exception ex)
{
MediaCore?.Log(
MediaLogMessageType.Error,
$"{nameof(MediaCommandManager)}.{nameof(OpenAsync)}: {ex.GetType()} - {ex.Message}");
}
finally
{
ExecutingCommand?.Complete();
ExecutingCommand = null;
IsOpening.Value = false;
}
});
await TaskEx.Run(action);
}
/// <summary>
/// Opens the specified URI.
/// The command is processed in a Thread Pool Thread.
/// </summary>
/// <param name="uri">The URI.</param>
public void Open(Uri uri)
{
lock (SyncLock)
{
Commands.Clear();
}
// Process the command in a background thread as opposed
// to in the thread that it was called to prevent blocking.
var command = new OpenCommand(this, uri);
ExecuteAndWaitFor(command);
// Debug.Assert(MediaElement.IsOpen == true && MediaElement.IsOpening == false && command.HasCompleted, "Synchronous conditions");
}
/// <summary>
/// Opens the specified URI.
/// The command is processed in a Thread Pool Thread.
/// </summary>
/// <param name="uri">The URI.</param>
/// <returns>The awaitable task</returns>
public async Task Open(Uri uri)
{
lock (SyncLock)
{
Commands.Clear();
}
// Process the command in a background thread as opposed
// to in the thread that it was called to prevent blocking.
await Task.Run(async() =>
{
var command = new OpenCommand(this, uri);
await command.ExecuteAsync();
});
}
/// <summary>
/// Opens the specified custom input stream.
/// This command gets processed in a threadpool thread asynchronously.
/// </summary>
/// <param name="stream">The custom input stream.</param>
/// <returns>
/// The asynchronous task
/// </returns>
public async Task OpenAsync(IMediaInputStream stream)
{
// Check Uri Argument
if (stream == null)
{
MediaCore?.Log(
MediaLogMessageType.Warning,
$"{nameof(MediaCommandManager)}.{nameof(OpenAsync)}: '{nameof(stream)}' cannot be null");
return;
}
if (CanExecuteCommands == false)
{
return;
}
else
{
IsOpening.Value = true;
}
var command = new OpenCommand(this, stream);
ExecutingCommand = command;
ClearCommandQueue();
try
{
if (command.HasCompleted)
{
return;
}
await command.StartAsync();
}
catch (Exception ex)
{
MediaCore?.Log(
MediaLogMessageType.Error,
$"{nameof(MediaCommandManager)}.{nameof(OpenAsync)}: {ex.GetType()} - {ex.Message}");
}
finally
{
ExecutingCommand?.Complete();
ExecutingCommand = null;
IsOpening.Value = false;
}
}
