/// <summary>
/// 動画ストリームの取得します
/// 他にダウンロードされているアイテムは強制的に一時停止し、再生終了後に再開されます
/// </summary>
/// <exception cref="NotSupportedException" />
public async Task <IVideoStreamingSession> CreateVideoStreamingSession(NicoVideoQuality quality, bool forceDownload = false)
{
// オンラインの場合は削除済みかを確認する
object watchRes = null;
if (Helpers.InternetConnection.IsInternet())
{
// 動画視聴ページへアクセス
// 動画再生準備およびコメント取得準備が行われる
watchRes = await VisitWatchPage(quality);
// 動画情報ページアクセスだけでも内部の動画情報データは更新される
var videoInfo = Database.NicoVideoDb.Get(RawVideoId);
// 動作互換性のためにサムネから拾うように戻す？
// var videoInfo = await _ContentProvider.GetNicoVideoInfo(RawVideoId);
if (videoInfo.IsDeleted)
{
// ニコニコサーバー側で動画削除済みの場合は再生不可
// （NiconnicoContentProvider側で動画削除動作を実施している）
throw new NotSupportedException($"動画は {videoInfo.PrivateReasonType.ToCulturelizeString()} のため視聴できません");
}
}
if (!forceDownload)
{
// キャッシュ済みアイテムを問い合わせ
var cacheRequests = await CacheManager.GetCacheRequest(RawVideoId);
NicoVideoCacheRequest playCandidateRequest = null;
var req = cacheRequests.FirstOrDefault(x => x.Quality == quality);
if (req is NicoVideoCacheInfo || req is NicoVideoCacheProgress)
{
playCandidateRequest = req;
}
if (req == null)
{
var playableReq = cacheRequests.Where(x => x is NicoVideoCacheInfo || x is NicoVideoCacheProgress);
if (playableReq.Any())
{
// 画質指定がない、または指定画質のキャッシュがない場合には
// キャッシュが存在する画質（高画質優先）を取り出す
playCandidateRequest = playableReq.OrderBy(x => x.Quality).FirstOrDefault();
}
}
if (playCandidateRequest is NicoVideoCacheInfo)
{
var playCandidateCache = playCandidateRequest as NicoVideoCacheInfo;
try
{
var file = await StorageFile.GetFileFromPathAsync(playCandidateCache.FilePath);
return(new LocalVideoStreamingSession(file, playCandidateCache.Quality, _Context));
}
catch
{
Debug.WriteLine("動画視聴時にキャッシュが見つかったが、キャッシュファイルを利用した再生セッションの作成に失敗、オンライン再生を試行します");
}
}
else if (playCandidateRequest is NicoVideoCacheProgress)
{
/*
* if (Helpers.ApiContractHelper.IsFallCreatorsUpdateAvailable)
* {
* var playCandidateCacheProgress = playCandidateRequest as NicoVideoCacheProgress;
* var op = playCandidateCacheProgress.DownloadOperation;
* var refStream = op.GetResultRandomAccessStreamReference();
* return new DownloadProgressVideoStreamingSession(refStream, playCandidateCacheProgress.Quality);
* }
*/
}
}
// キャッシュがない場合はオンラインで再生
if (watchRes is WatchApiResponse)
{
var res = watchRes as WatchApiResponse;
if (res.flashvars.movie_type == "swf")
{
throw new NotSupportedException("SWF形式の動画はサポートしていません");
}
if (res.VideoUrl.OriginalString.StartsWith("rtmp"))
{
throw new NotSupportedException("RTMP形式の動画はサポートしていません");
}
if (res.IsDeleted)
{
throw new NotSupportedException("動画は削除されています");
}
return(new SmileVideoStreamingSession(
res.VideoUrl,
_Context
));
}
else if (watchRes is DmcWatchData)
{
var res = watchRes as DmcWatchData;
if (res.DmcWatchResponse.Video.IsDeleted)
{
throw new NotSupportedException("動画は削除されています");
}
if (res.DmcWatchResponse.Video.DmcInfo != null)
{
if (res.DmcWatchResponse.Video?.DmcInfo?.Quality == null)
{
throw new NotSupportedException("動画の視聴権がありません");
}
if (quality.IsLegacy() && res.DmcWatchResponse.Video.SmileInfo != null)
{
return(new SmileVideoStreamingSession(
new Uri(res.DmcWatchResponse.Video.SmileInfo.Url),
_Context
));
}
else
{
return(new DmcVideoStreamingSession(
res,
quality.IsDmc() ? quality : NicoVideoQuality.Dmc_High,
_Context
));
}
}
else if (res.DmcWatchResponse.Video.SmileInfo != null)
{
return(new SmileVideoStreamingSession(
new Uri(res.DmcWatchResponse.Video.SmileInfo.Url),
_Context
));
}
else
{
throw new NotSupportedException("動画ページ情報から動画ファイルURLを検出できませんでした");
}
}
else
{
throw new NotSupportedException("動画の再生準備に失敗（動画ページの解析でエラーが発生）");
}
}
public async Task <object> VisitWatchPage(NicoVideoQuality quality)
{
if (!Helpers.InternetConnection.IsInternet())
{
return(null);
}
object res = null;
try
{
if (quality.IsLegacy())
{
res = await GetWatchApiResponse(IsForceSmileLowQuality);
}
else
{
var dmcRes = await GetDmcWatchResponse();
res = dmcRes;
}
}
catch
{
if (quality.IsLegacy())
{
throw;
}
await Task.Delay(TimeSpan.FromSeconds(1));
res = await GetWatchApiResponse(IsForceSmileLowQuality);
}
_LastAccessResponse = res;
if (res is WatchApiResponse)
{
var watchApiRes = res as WatchApiResponse;
CommentClient = new CommentClient(_Context, new CommentServerInfo()
{
ServerUrl = watchApiRes.CommentServerUrl.OriginalString,
VideoId = RawVideoId,
DefaultThreadId = (int)watchApiRes.ThreadId,
CommunityThreadId = (int)watchApiRes.OptionalThreadId,
ViewerUserId = watchApiRes.viewerInfo.id,
ThreadKeyRequired = watchApiRes.IsKeyRequired
});
return(res);
}
else if (res is DmcWatchData)
{
var watchdata = res as DmcWatchData;
var dmcRes = watchdata.DmcWatchResponse;
CommentClient = new CommentClient(_Context, new CommentServerInfo()
{
ServerUrl = dmcRes.Thread.ServerUrl,
VideoId = RawVideoId,
DefaultThreadId = int.Parse(dmcRes.Thread.Ids.Default),
ViewerUserId = dmcRes.Viewer.Id,
ThreadKeyRequired = dmcRes.Video.IsOfficial
})
{
LastAccessDmcWatchResponse = dmcRes
};
if (int.TryParse(dmcRes.Thread.Ids.Community, out var communityThreadId))
{
CommentClient.CommentServerInfo.CommunityThreadId = communityThreadId;
Debug.WriteLine("dmcRes.Video.DmcInfo.Thread.PostkeyAvailable: " + dmcRes.Video.DmcInfo?.Thread?.PostkeyAvailable);
}
return(res);
}
else
{
return(null);
}
}