<mediaProvider type="Sitecore.Resources.Media.MediaProvider, Sitecore.Kernel" />

<add name="sitecore" type="Sitecore.Links.LinkProvider, Sitecore.Kernel" addAspxExtension="false" alwaysIncludeServerUrl="false" encodeNames="true" languageEmbedding="asNeeded" languageLocation="filePath" lowercaseUrls="false" shortenUrls="true" useDisplayName="false" />

public virtual string GetMediaUrl(MediaItem item)
{
  return this.GetMediaUrl(item, MediaUrlOptions.Empty);
}

public virtual string GetMediaUrl(MediaItem item, MediaUrlOptions options)
{
  ...
}