public static WebMediaInfo GetMediaInfo(MediaSource source)
{
// we can't use our persistent cache for TV unfortunately, but we do cache them in memory for 60 seconds
if (source.MediaType == WebMediaType.TV)
{
if (tvCache.ContainsKey(source.Id) && DateTime.Now - tvCache[source.Id].Item1 > TimeSpan.FromSeconds(60))
{
return(tvCache[source.Id].Item2);
}
// save it to our memory cache for a while
TsBuffer buf = new TsBuffer(source.Id);
string path = buf.GetCurrentFilePath();
Log.Debug("Using path {0} from TS buffer {1} as source for {2}", path, source.Id, source.GetDebugName());
WebMediaInfo info = DoLoadMediaInfo(buf.GetCurrentFilePath(), true);
tvCache[source.Id] = new Tuple <DateTime, WebMediaInfo>(DateTime.Now, info);
return(info);
}
// load this item from persistent disk cache, if possible
if (persistentCache.HasForSource(source))
{
return(persistentCache.GetForSource(source));
}
// some checks that only matter when we are actually going to load it from disk
if (!source.Exists)
{
Log.Warn("Trying to load mediainfo for {0}, which doesn't seem to exist", source.GetDebugName());
return(null);
}
else if (!source.SupportsDirectAccess)
{
// not (yet?) supported
Log.Warn("Loading mediainfo for non-direct access source {0} isn't supported yet", source.GetDebugName());
return(null);
}
// actually load it
WebMediaInfo outInfo;
using (var impersonator = source.GetImpersonator())
{
outInfo = DoLoadMediaInfo(source.GetPath(), false);
}
if (outInfo != null)
{
persistentCache.Save(source, outInfo);
}
return(outInfo);
}
public static WebMediaInfo GetMediaInfo(MediaSource source)
{
// Timeshiftings are a special case, as they can't be cached and need an additional path resolving step
if (source.MediaType == WebMediaType.TV)
{
if (tvCache.ContainsKey(source.Id) && DateTime.Now - tvCache[source.Id].Item1 > TimeSpan.FromSeconds(60))
{
return(tvCache[source.Id].Item2);
}
TsBuffer tsBuffer = new TsBuffer(source.Id);
Log.Debug("Using path {0} from TS buffer {1} as source for {2}", tsBuffer.GetCurrentFilePath(), source.Id, source.GetDebugName());
WebMediaInfo info = LoadMediaInfo(tsBuffer.GetCurrentFilePath());
tvCache[source.Id] = new Tuple <DateTime, WebMediaInfo>(DateTime.Now, info);
return(info);
}
using (var context = source.CreateNetworkContext())
{
// verify the file actually exists and is accessible over the local file system
if (!source.Exists)
{
Log.Warn("Trying to load MediaInfo for {0}, which does not exist or is inaccessible", source.GetDebugName());
return(null);
}
else if (!source.SupportsDirectAccess)
{
Log.Warn("Loading MediaInfo for non-direct access source {0} isn't supported yet", source.GetDebugName());
return(null);
}
// if we got the file in the cache, return it if we have it and the file hasn't been changed
var fileInfo = source.GetFileInfo();
if (source.MediaType != WebMediaType.TV && persistentCache.HasForSource(source))
{
var cachedItem = persistentCache.GetForSource(source);
if (cachedItem.Size == fileInfo.Size && cachedItem.CachedDate >= fileInfo.LastModifiedTime)
{
return(cachedItem.Info);
}
}
var info = LoadMediaInfo(context.RewritePath(source.GetPath()));
if (info != null)
{
persistentCache.Save(source, new CachedInfoWrapper(info, fileInfo));
}
return(info);
}
}