/// <summary>
/// The state change handler that defines what happens whenever the player changes state
/// </summary>
private void StateChanged()
{
if (State != PlayerState.Playing)
{
playLifetime = null;
}
if (State == PlayerState.Playing)
{
if (duration.HasValue == false)
{
throw new InvalidOperationException("Playback is not permitted before a video is loaded");
}
playStartPosition = TimeSpan.FromSeconds(playerProgressBar.PlayCursorPosition * duration.Value.TotalSeconds);
playStartTime = DateTime.UtcNow;
// start a play loop for as long as the state remains unchanged
this.playLifetime = this.GetPropertyValueLifetime(nameof(State));
playLifetime.LifetimeManager.Manage(Application.SetInterval(() =>
{
if (State != PlayerState.Playing)
{
return;
}
var now = DateTime.UtcNow;
var delta = now - playStartTime;
var newPlayerPosition = playStartPosition + delta;
var videoLocationPercentage = Math.Round(100.0 * newPlayerPosition.TotalSeconds / duration.Value.TotalSeconds, 1);
videoLocationPercentage = Math.Min(videoLocationPercentage, 100);
playerProgressBar.PlayCursorPosition = videoLocationPercentage / 100.0;
playButton.Text = $"Pause".ToConsoleString();
ConsoleBitmap seekedImage;
if (newPlayerPosition > duration)
{
State = PlayerState.Stopped;
}
else if (inMemoryVideo.TrySeek(newPlayerPosition, out seekedImage) == false)
{
State = PlayerState.Buffering;
}
else
{
CurrentFrame = seekedImage;
}
}, TimeSpan.FromMilliseconds(1)));
}
else if (State == PlayerState.Stopped)
{
pictureFrame.BorderColor = ConsoleColor.Yellow;
playButton.Text = "Play".ToConsoleString();
}
else if (State == PlayerState.Paused)
{
playButton.Text = "Play".ToConsoleString();
}
else if (State == PlayerState.NotLoaded)
{
playButton.Text = "Play".ToConsoleString();
playButton.CanFocus = false;
}
else if (State == PlayerState.Buffering)
{
playButton.Text = "Play".ToConsoleString();
}
else if (State == PlayerState.Failed)
{
pictureFrame.BorderColor = ConsoleColor.Red;
Dialog.ShowMessage(failedMessage.ToRed());
}
else
{
throw new Exception("Unknown state: " + State);
}
}
