/// <summary>
/// Get VideoInfo of a youtube video
/// </summary>
/// <param name="youtubeLink">The youtube link of a movie</param>
/// <param name="qualitySetting">The youtube quality settings</param>
/// <returns>The trailer's video info</returns>
private async Task<VideoInfo> GetVideoInfoForStreamingAsync(string youtubeLink,
Constants.YoutubeStreamingQuality qualitySetting)
{
IEnumerable<VideoInfo> videoInfos = new List<VideoInfo>();
// Get video infos of the requested video
await Task.Run(() => videoInfos = DownloadUrlResolver.GetDownloadUrls(youtubeLink, false));
// We only want video matching criterias : only mp4 and no adaptive
var filtered = videoInfos
.Where(info => info.VideoType == VideoType.Mp4 && !info.Is3D && info.AdaptiveType == AdaptiveType.None);
return GetVideoByStreamingQuality(filtered, qualitySetting);
}
/// <summary>
/// Get youtube video depending of choosen quality settings
/// </summary>
/// <param name="videosToProcess">List of VideoInfo</param>
/// <param name="quality">The youtube quality settings</param>
/// <returns>The trailer's video info</returns>
private VideoInfo GetVideoByStreamingQuality(IEnumerable<VideoInfo> videosToProcess,
Constants.YoutubeStreamingQuality quality)
{
while (true)
{
var videos = videosToProcess.ToList(); // Prevent multiple enumeration
if (quality == Constants.YoutubeStreamingQuality.High)
// Choose high quality Youtube video
return videos.OrderByDescending(x => x.Resolution).FirstOrDefault();
// Pick the video with the requested quality settings
var preferredResolutions = StreamingQualityMap[quality];
var preferredVideos =
videos.Where(info => preferredResolutions.Contains(info.Resolution))
.OrderByDescending(info => info.Resolution);
var video = preferredVideos.FirstOrDefault();
if (video != null) return video;
videosToProcess = videos;
quality = (Constants.YoutubeStreamingQuality) (((int) quality) - 1);
}
}
/// <summary>
/// Get youtube video depending of choosen quality settings
/// </summary>
/// <param name="videosToProcess">List of VideoInfo</param>
/// <param name="quality">The youtube quality settings</param>
private VideoInfo GetVideoByStreamingQuality(IEnumerable<VideoInfo> videosToProcess,
Constants.YoutubeStreamingQuality quality)
{
var videos = videosToProcess.ToList(); // Prevent multiple enumeration
if (quality == Constants.YoutubeStreamingQuality.High)
{
// Choose high quality Youtube video
return videos.OrderByDescending(x => x.Resolution)
.FirstOrDefault();
}
// Pick the video with the requested quality settings
var preferredResolutions = StreamingQualityMap[quality];
var preferredVideos = videos
.Where(info => preferredResolutions.Contains(info.Resolution))
.OrderByDescending(info => info.Resolution);
var video = preferredVideos.FirstOrDefault();
if (video == null)
{
// We search for an other video quality if none has been found
return GetVideoByStreamingQuality(videos, (Constants.YoutubeStreamingQuality) (((int) quality) - 1));
}
return video;
}