/// <summary>
/// Gets the playback duration of the current media item.
/// </summary>
/// <param name="mediaPlayer">A valid IMFPMediaPlayer instance.</param>
/// <param name="durationValue">Receives the duration.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult GetDuration(this IMFPMediaPlayer mediaPlayer, out TimeSpan durationValue)
{
if (mediaPlayer == null)
{
throw new ArgumentNullException("mediaPlayer");
}
using (PropVariant result = new PropVariant())
{
HResult hr = mediaPlayer.GetDuration(Guid.Empty, result);
durationValue = hr.Succeeded() ? TimeSpan.FromTicks((long)result.GetULong()) : default(TimeSpan);
return(hr);
}
}