private MediaResource SelectResourceForPlayback(MediaItem mediaItem)
{
var resource = mediaItem.Resources.First();
var imageItem = mediaItem as ImageItem;
if (imageItem != null)
{
var maxWidth = 0.0;
foreach (var mediaResource in imageItem.Resources)
{
if (mediaResource.Resolution.Width > maxWidth)
{
maxWidth = mediaResource.Resolution.Width;
resource = mediaResource;
}
}
}
return resource;
}
/// <summary>
/// Prepares the <paramref name="item"/> for playback on renderer.
/// </summary>
/// <param name="item">
/// An item to play on renderer.
/// </param>
/// <returns>
/// An <see cref="Task"/> instance which notifies about completion the async operation.
/// </returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="item"/> is <c>null</c>.
/// </exception>
/// <exception cref="WebException">
/// An error occurred when sending request to service.
/// </exception>
/// <exception cref="MediaRendererException">
/// An unexpected error occurred when executing request on device.
/// </exception>
public async Task OpenAsync(MediaItem item)
{
item.EnsureNotNull("item");
var resource = this.SelectResourceForPlayback(item);
try
{
await this.avTransportService.SetAvTransportURIAsync(0, resource.Uri, resource.Metadata);
}
catch (FormatException ex)
{
throw new MediaRendererException(this, MediaRendererError.UnexpectedError, "Received result is in a bad format", ex);
}
catch (UPnPServiceException ex)
{
throw new MediaRendererException(this, ex.ErrorCode.ToMediaRendererError(), "An error occurred when opening '{0}'".F(resource.Uri), ex);
}
}