async Task PlayAdsOfType <T>(CancellationToken cancellationToken) where T : Advertisement
{
var adsToPlay = EligableAds.OfType <T>().Where(a => a.Source != null).ToList();
HandledAds.AddRange(adsToPlay.Cast <Advertisement>());
if (adsToPlay.Any())
{
await PlayAds(adsToPlay.Cast <Advertisement>(), cancellationToken);
}
}
async void PreloadAdMarker(TimelineMarker marker)
{
var ad = EligableAds.OfType <Advertisement>().Where(a => a.Source != null).FirstOrDefault(a => a.Id == marker.Text);
if (ad != null)
{
var cancellationTokenSource = new CancellationTokenSource();
var task = MediaPlayer.PreloadAd(ad.Source, cancellationTokenSource.Token);
if (task != null)
{
await SetOrReplaceActivePreloadOperation(new PreloadOperation(ad.Source, task, cancellationTokenSource));
}
}
}
async void MediaPlayer_MediaEnding(object sender, MediaPlayerDeferrableEventArgs e)
{
if (EligableAds.OfType <PostrollAdvertisement>().Any(a => a.Source != null))
{
var deferral = e.DeferrableOperation.GetDeferral();
try
{
await PlayAdsOfType <PostrollAdvertisement>(CancellationTokenSource.CreateLinkedTokenSource(deferral.CancellationToken, cts.Token).Token);
}
catch { /* ignore */ }
finally
{
deferral.Complete();
}
}
}
/// <summary>
/// Evaluates all markers in a window and plays an ad if applicable.
/// </summary>
/// <param name="originalPosition">The window start position.</param>
/// <param name="newPosition">The window end position. Note: This can be before originalPosition if going backwards.</param>
/// <returns>A boolean indicating that an ad was played.</returns>
public bool EvaluateMarkers(TimeSpan originalPosition, TimeSpan newPosition)
{
if (!EvaluateOnForwardOnly || newPosition > originalPosition)
{
foreach (var marker in MediaPlayer.Markers.Where(m => m.Type == MarkerType_Play).ToList())
{
if (marker.Time <= newPosition && marker.Time > originalPosition)
{
var ad = EligableAds.OfType <MidrollAdvertisement>().Where(a => a.Source != null).FirstOrDefault(a => a.Id == marker.Text);
if (ad != null)
{
var syncToPosition = SeekToAdPosition ? marker.Time.Add(ad.Duration) : newPosition;
PlayAd(ad, syncToPosition);
return(true);
}
}
}
}
return(false);
}
internal async Task PlayStartupAds(CancellationToken c)
{
if (MediaPlayer.AllowMediaStartingDeferrals)
{
IList <Advertisement> startupAds;
if (MediaPlayer.StartupPosition.HasValue)
{
startupAds = EligableAds
.OfType <MidrollAdvertisement>()
.Where(a => a.Source != null && a.Time == MediaPlayer.StartupPosition.Value)
.Cast <Advertisement>()
.ToList();
}
else
{
startupAds = EligableAds
.OfType <PrerollAdvertisement>()
.Where(a => a.Source != null)
.Cast <Advertisement>()
.ToList();
}
if (startupAds.Any())
{
try
{
using (var adCts = CancellationTokenSource.CreateLinkedTokenSource(c, cts.Token))
{
HandledAds.AddRange(startupAds);
await PlayAds(startupAds, adCts.Token);
}
}
catch { /* ignore */ }
}
}
}
