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 (NetworkShareImpersonator impersonator = new NetworkShareImpersonator(source.NeedsImpersonation))
{
outInfo = DoLoadMediaInfo(source.GetPath(), false);
}
if (outInfo != null)
{
persistentCache.Save(source, outInfo);
}
return outInfo;
}
public static WebMediaInfo GetMediaInfo(MediaSource source)
{
// we can't cache it for TV, unfortunately
if (source.MediaType == WebStreamMediaType.TV)
{
// cache tv files for 60 seconds
if (tvCache.ContainsKey(source.Id) && DateTime.Now - tvCache[source.Id].Item1 > TimeSpan.FromSeconds(60))
{
// cache is valid, use it
return tvCache[source.Id].Item2;
}
// get media info and save it to the cache
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 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());
throw new FileNotFoundException();
}
else if (!source.SupportsDirectAccess)
{
// not (yet?) supported
Log.Warn("Loading mediainfo for non-direct access source {0} isn't supported yet", source.GetDebugName());
throw new NotSupportedException();
}
// actually load it
WebMediaInfo outInfo;
using (var impersonator = source.GetImpersonator())
{
outInfo = DoLoadMediaInfo(source.GetPath(), false);
}
persistentCache.Save(source, outInfo);
return outInfo;
}
public bool InitStream(string identifier, string clientDescription, MediaSource source, int timeout)
{
if (!source.Exists)
{
Log.Warn("Tried to start stream for non-existing file {0}", source.GetDebugName());
return(false);
}
ActiveStream stream = new ActiveStream();
stream.Identifier = identifier;
stream.ClientDescription = clientDescription;
stream.StartTime = DateTime.Now;
stream.Timeout = timeout;
stream.LastActivity = DateTime.Now;
stream.UseActivityForTimeout = false;
stream.Context = new StreamContext();
stream.Context.Source = source;
stream.Context.IsTv = source.MediaType == WebMediaType.TV;
// Some clients such as WebMP proxy the streams before relying it to the client. We should give these clients the option to
// forward the real IP address, so that we can show that one in the configurator too. However, to avoid abuse, we should show
// the real IP of the client too, so make up some nice text string.
string realIp = WCFUtil.GetHeaderValue("forwardedFor", "X-Forwarded-For");
stream.ClientIP = realIp == null?WCFUtil.GetClientIPAddress() : String.Format("{0} (via {1})", realIp, WCFUtil.GetClientIPAddress());
Streams[identifier] = stream;
return(true);
}
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;
}
}
public static Stream ExtractImage(MediaSource source, long position, int? maxWidth, int? maxHeight, string borders, string format)
{
if (!source.Exists)
{
Log.Warn("ExtractImage: Source {0} (resolved to path {1}) doesn't exists", source.GetDebugName(), source.GetPath());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return Stream.Null;
}
if (!source.SupportsDirectAccess)
{
Log.Warn("ExtractImage: Extracting images from remote sources isn't supported yet", source.MediaType, source.Id);
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotImplemented);
return Stream.Null;
}
// get temporary filename
string filename = String.Format("extract_{0}_{1}.jpg", source.GetUniqueIdentifier(), position);
string tempFile = cache.GetPath(filename);
// maybe it exists in cache, return that then
if (cache.Contains(filename))
{
return StreamPostprocessedImage(new ImageMediaSource(tempFile), maxWidth, maxHeight, borders, format);
}
// execute it
ProcessStartInfo info = new ProcessStartInfo();
using (var impersonator = source.GetImpersonator())
{
info.Arguments = String.Format("-ss {0} -i \"{1}\" -vframes 1 -f image2 {2}", position, source.GetPath(), tempFile);
info.FileName = Configuration.StreamingProfiles.FFMpegPath;
info.CreateNoWindow = true;
info.UseShellExecute = false;
Process proc = new Process();
proc.StartInfo = info;
proc.Start();
proc.WaitForExit();
}
// log when failed
if (!File.Exists(tempFile))
{
Log.Warn("Failed to extract image to temporary file {0} with command {1}", tempFile, info.Arguments);
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.InternalServerError);
return Stream.Null;
}
return StreamPostprocessedImage(new ImageMediaSource(tempFile), maxWidth, maxHeight, borders, format);
}
public static decimal DEFAULT_ASPECT_RATIO = (decimal)16 / 9; // most new material is 16:9 these days
public static WebMediaInfo LoadMediaInfoOrSurrogate(MediaSource source)
{
WebMediaInfo info;
try
{
info = MediaInfoWrapper.GetMediaInfo(source);
if (info != null)
{
return(info);
}
}
catch (Exception ex)
{
Log.Warn(String.Format("Failed to load MediaInfo for {0}", source.GetDebugName()), ex);
}
WebMediaInfo surr = new WebMediaInfo();
surr.Duration = 0;
surr.SubtitleStreams = new List <WebSubtitleStream>();
surr.AudioStreams = new List <WebAudioStream>()
{
new WebAudioStream()
{
Channels = 2,
Codec = "Unknown",
ID = 1,
Index = 0,
Language = "und", // yes, that's valid ISO 639 (I think)
LanguageFull = "Unknown",
}
};
surr.VideoStreams = new List <WebVideoStream>()
{
new WebVideoStream()
{
Codec = "Unknown",
DisplayAspectRatio = DEFAULT_ASPECT_RATIO,
DisplayAspectRatioString = "16:9",
ID = 2,
Index = 0,
Height = 720,
Width = 1280
}
};
return(surr);
}
public static decimal DEFAULT_ASPECT_RATIO = (decimal)16 / 9; // most new material is 16:9 these days
#endregion Fields
#region Methods
public static WebMediaInfo LoadMediaInfoOrSurrogate(MediaSource source)
{
WebMediaInfo info;
try
{
info = MediaInfoWrapper.GetMediaInfo(source);
if (info != null)
{
return info;
}
}
catch (Exception ex)
{
Log.Warn(String.Format("Failed to load MediaInfo for {0}", source.GetDebugName()), ex);
}
WebMediaInfo surr = new WebMediaInfo();
surr.Duration = 0;
surr.SubtitleStreams = new List<WebSubtitleStream>();
surr.AudioStreams = new List<WebAudioStream>()
{
new WebAudioStream()
{
Channels = 2,
Codec = "Unknown",
ID = 1,
Index = 0,
Language = "und", // yes, that's valid ISO 639 (I think)
LanguageFull = "Unknown",
}
};
surr.VideoStreams = new List<WebVideoStream>()
{
new WebVideoStream()
{
Codec = "Unknown",
DisplayAspectRatio = DEFAULT_ASPECT_RATIO,
DisplayAspectRatioString = "16:9",
ID = 2,
Index = 0,
Height = 1280, // gives this any problems?
Width = 720
}
};
return surr;
}
private static bool ExecuteFFMpegExtraction(MediaSource source, string path, long position, string tempFile)
{
var info = new ProcessStartInfo();
info.Arguments = String.Format("-ss {0} -i \"{1}\" -vframes 1 -vf \"yadif,scale=ih*dar:ih\" -f image2 \"{2}\"", position, path, tempFile);
info.FileName = Configuration.StreamingProfiles.FFMpegPath;
info.CreateNoWindow = true;
info.UseShellExecute = false;
info.RedirectStandardError = Log.IsEnabled(LogLevel.Trace);
info.RedirectStandardOutput = Log.IsEnabled(LogLevel.Trace);
TranscoderProcess proc = new TranscoderProcess();
proc.StartInfo = info;
if (source.NeedsImpersonation)
{
proc.StartAsUser(Configuration.Services.NetworkImpersonation.Domain, Configuration.Services.NetworkImpersonation.Username, Configuration.Services.NetworkImpersonation.GetPassword());
}
else
{
proc.Start();
}
if (Log.IsEnabled(LogLevel.Trace))
{
Log.Trace("ExtractImage: executing path={0} arguments={1}", info.FileName, info.Arguments);
StreamCopy.AsyncStreamRead(proc.StandardError, l => Log.Trace("ExtractImage: stderr: {0}", l));
StreamCopy.AsyncStreamRead(proc.StandardOutput, l => Log.Trace("ExtractImage: stdout: {0}", l));
}
proc.WaitForExit();
if (!File.Exists(tempFile))
{
Log.Warn("Failed to extract image from {0} with {1} {2}", source.GetDebugName(), info.FileName, info.Arguments);
return(false);
}
return(true);
}
public bool InitStream(string identifier, string clientDescription, MediaSource source)
{
if (!source.Exists)
{
Log.Warn("Tried to start stream for non-existing file {0}", source.GetDebugName());
return(false);
}
ActiveStream stream = new ActiveStream();
stream.Identifier = identifier;
stream.ClientDescription = clientDescription;
stream.ClientIP = WCFUtil.GetClientIPAddress();
stream.StartTime = DateTime.Now;
stream.Context = new StreamContext();
stream.Context.Source = source;
stream.Context.IsTv = source.MediaType == WebStreamMediaType.TV;
lock (Streams)
{
Streams[identifier] = stream;
}
return(true);
}
public Stream GetMediaItem(WebStreamMediaType type, int? provider, string itemId)
{
MediaSource source = new MediaSource(type, provider, itemId);
try
{
if (!source.Exists)
{
throw new FileNotFoundException();
}
return source.Retrieve();
}
catch (Exception ex)
{
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
Log.Info(String.Format("GetMediaItem() failed for {0}", source.GetDebugName()), ex);
return Stream.Null;
}
}
public static Stream ExtractImage(MediaSource source, long startPosition, int?maxWidth, int?maxHeight)
{
if (!source.Exists)
{
Log.Warn("ExtractImage: Source {0} (resolved to path {1}) doesn't exists", source.GetDebugName(), source.GetPath());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return(Stream.Null);
}
if (!source.SupportsDirectAccess)
{
Log.Warn("ExtractImage: Extracting images from remote sources isn't supported yet", source.MediaType, source.Id);
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotImplemented);
return(Stream.Null);
}
// calculate size
string ffmpegResize = "";
if (maxWidth != null || maxHeight != null)
{
try
{
decimal resolution = MediaInfoWrapper.GetMediaInfo(source).VideoStreams.First().DisplayAspectRatio;
ffmpegResize = "-s " + Resolution.Calculate(resolution, maxWidth, maxHeight).ToString();
}
catch (Exception ex)
{
Log.Error("Error while getting resolution of video stream, not resizing", ex);
}
}
// get temporary filename
string filename = String.Format("extract_{0}_{1}_{2}_{3}.jpg", source.GetUniqueIdentifier(), startPosition,
maxWidth == null ? "null" : maxWidth.ToString(), maxHeight == null ? "null" : maxHeight.ToString());
string tempFile = cache.GetPath(filename);
// maybe it exists in cache, return that then
if (cache.Contains(filename))
{
return(StreamImage(new ImageMediaSource(tempFile)));
}
// execute it
ProcessStartInfo info = new ProcessStartInfo();
using (var impersonator = source.GetImpersonator())
{
info.Arguments = String.Format("-ss {0} -i \"{1}\" {2} -vframes 1 -f image2 {3}", startPosition, source.GetPath(), ffmpegResize, tempFile);
info.FileName = Configuration.Streaming.FFMpegPath;
info.CreateNoWindow = true;
info.UseShellExecute = false;
Process proc = new Process();
proc.StartInfo = info;
proc.Start();
proc.WaitForExit();
}
// log when failed
if (!File.Exists(tempFile))
{
Log.Warn("Failed to extract image to temporary file {0} with command {1}", tempFile, info.Arguments);
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.InternalServerError);
return(Stream.Null);
}
return(StreamImage(new ImageMediaSource(tempFile)));
}
public Stream GetMediaItem(WebStreamMediaType type, int? provider, string itemId)
{
if (!_authorizedHosts.Contains(WCFUtil.GetClientIPAddress()) && !NetworkInformation.IsLocalAddress(WCFUtil.GetClientIPAddress()))
{
Log.Warn("Host {0} isn't authorized to call GetMediaItem", WCFUtil.GetClientIPAddress());
WCFUtil.SetResponseCode(HttpStatusCode.Unauthorized);
return Stream.Null;
}
MediaSource source = new MediaSource(type, provider, itemId);
try
{
if (!source.Exists)
{
throw new FileNotFoundException();
}
WCFUtil.AddHeader("Content-Disposition", "attachment; filename=\"" + source.GetFileInfo().Name + "\"");
WCFUtil.SetContentLength(source.GetFileInfo().Size);
// there has to be a better way to do this
object mime = RegistryReader.ReadKey(Microsoft.Win32.RegistryHive.ClassesRoot, Path.GetExtension(source.GetFileInfo().Name), "Content Type");
if (mime != null)
{
WCFUtil.SetContentType(mime.ToString());
}
return source.Retrieve();
}
catch (Exception ex)
{
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
Log.Info(String.Format("GetMediaItem() failed for {0}", source.GetDebugName()), ex);
return Stream.Null;
}
}
public static Stream ExtractImage(MediaSource source, int startPosition, int? maxWidth, int? maxHeight)
{
if (!source.Exists)
{
Log.Warn("ExtractImage: Source {0} (resolved to path {1}) doesn't exists", source.GetDebugName(), source.GetPath());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return Stream.Null;
}
if (!source.SupportsDirectAccess)
{
Log.Warn("ExtractImage: Extracting images from remote sources isn't supported yet", source.MediaType, source.Id);
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotImplemented);
return Stream.Null;
}
// calculate size
string ffmpegResize = "";
if (maxWidth != null || maxHeight != null)
{
try
{
decimal resolution = MediaInfoWrapper.GetMediaInfo(source).VideoStreams.First().DisplayAspectRatio;
ffmpegResize = "-s " + Resolution.Calculate(resolution, maxWidth, maxHeight).ToString();
}
catch (Exception ex)
{
Log.Error("Error while getting resolution of video stream, not resizing", ex);
}
}
// get temporary filename
string tempDir = Path.Combine(Path.GetTempPath(), "MPExtended", "imagecache");
if (!Directory.Exists(tempDir))
{
Directory.CreateDirectory(tempDir);
}
string filename = String.Format("ex_{0}_{1}_{2}_{3}.jpg", source.GetUniqueIdentifier(), startPosition,
maxWidth == null ? "null" : maxWidth.ToString(), maxHeight == null ? "null" : maxHeight.ToString());
string tempFile = Path.Combine(tempDir, filename);
// maybe it exists in cache, return that then
if (File.Exists(tempFile))
{
return StreamImage(new ImageMediaSource(tempFile));
}
// execute it
ProcessStartInfo info = new ProcessStartInfo();
using (var impersonator = source.GetImpersonator())
{
info.Arguments = String.Format("-ss {0} -i \"{1}\" {2} -vframes 1 -f image2 {3}", startPosition, source.GetPath(), ffmpegResize, tempFile);
info.FileName = Configuration.Streaming.FFMpegPath;
info.CreateNoWindow = true;
info.UseShellExecute = false;
Process proc = new Process();
proc.StartInfo = info;
proc.Start();
proc.WaitForExit();
}
// log when failed
if (!File.Exists(tempFile))
{
Log.Warn("Failed to extract image to temporary file {0} with command {1}", tempFile, info.Arguments);
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.InternalServerError);
return Stream.Null;
}
return StreamImage(new ImageMediaSource(tempFile));
}
private static bool ExecuteFFMpegExtraction(MediaSource source, string path, long position, string tempFile)
{
var info = new ProcessStartInfo();
info.Arguments = String.Format("-ss {0} -i \"{1}\" -vframes 1 -vf \"yadif,scale=ih*dar:ih\" -f image2 \"{2}\"", position, path, tempFile);
info.FileName = Configuration.StreamingProfiles.FFMpegPath;
info.CreateNoWindow = true;
info.UseShellExecute = false;
info.RedirectStandardError = Log.IsEnabled(LogLevel.Trace);
info.RedirectStandardOutput = Log.IsEnabled(LogLevel.Trace);
TranscoderProcess proc = new TranscoderProcess();
proc.StartInfo = info;
if (source.NeedsImpersonation)
proc.StartAsUser(Configuration.Services.NetworkImpersonation.Domain, Configuration.Services.NetworkImpersonation.Username, Configuration.Services.NetworkImpersonation.GetPassword());
else
proc.Start();
if (Log.IsEnabled(LogLevel.Trace))
{
Log.Trace("ExtractImage: executing path={0} arguments={1}", info.FileName, info.Arguments);
StreamCopy.AsyncStreamRead(proc.StandardError, l => Log.Trace("ExtractImage: stderr: {0}", l));
StreamCopy.AsyncStreamRead(proc.StandardOutput, l => Log.Trace("ExtractImage: stdout: {0}", l));
}
proc.WaitForExit();
if (!File.Exists(tempFile))
{
Log.Warn("Failed to extract image from {0} with {1} {2}", source.GetDebugName(), info.FileName, info.Arguments);
return false;
}
return true;
}
private static ImageSource ConvertToImageSource(MediaSource source, WebArtworkType artworktype)
{
// handle tv and recordings specially
if (source.MediaType == WebStreamMediaType.TV || source.MediaType == WebStreamMediaType.Recording)
{
if (artworktype != WebArtworkType.Logo)
{
Log.Info("Requested invalid artwork mediatype={0} artworktype={1}", source.MediaType, artworktype);
return null;
}
// get display name
int idChannel = source.MediaType == WebStreamMediaType.TV ?
Int32.Parse(source.Id) :
MPEServices.TAS.GetRecordingById(Int32.Parse(source.Id)).IdChannel;
string channelName = MPEServices.TAS.GetChannelBasicById(idChannel).DisplayName;
// find directory
string tvLogoDir = Configuration.Streaming.TVLogoDirectory;
if (!Directory.Exists(tvLogoDir))
{
Log.Warn("TV logo directory {0} does not exists", tvLogoDir);
return null;
}
// find image
DirectoryInfo dirinfo = new DirectoryInfo(tvLogoDir);
var matched = dirinfo.GetFiles().Where(x => Path.GetFileNameWithoutExtension(x.Name).ToLowerInvariant() == channelName.ToLowerInvariant());
if(matched.Count() == 0)
{
Log.Debug("Did not find tv logo for channel {0}", channelName);
return null;
}
// great, return it
return new ImageSource(matched.First().FullName);
}
// handle all 'standard' media cases
// validate arguments
var pathlist = MPEServices.MAS.GetPathList(source.Provider, (WebMediaType)source.MediaType, (WebFileType)artworktype, source.Id);
if (pathlist == null || pathlist.Count <= source.Offset)
{
Log.Info("Requested unavailable artwork (offset not found) artworktype={0} {1}", artworktype, source.GetDebugName());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return null;
}
string path = pathlist.ElementAt(source.Offset);
Stream data = null;
WebFileInfo info = MPEServices.MAS.GetFileInfo(source.Provider, (WebMediaType)source.MediaType, (WebFileType)artworktype, source.Id, source.Offset);
if (!info.Exists)
{
Log.Info("Requested unavailable artwork (file not found) artworktype={0} {1}", artworktype, source.GetDebugName());
return null;
}
else if (!info.IsLocalFile)
{
data = MPEServices.MAS.RetrieveFile(source.Provider, (WebMediaType)source.MediaType, (WebFileType)artworktype, source.Id, source.Offset);
return new ImageSource(data);
}
else
{
return new ImageSource(path);
}
}
public static Stream ExtractImage(MediaSource source, long position, int?maxWidth, int?maxHeight, string borders, string format)
{
if (!source.Exists)
{
Log.Warn("ExtractImage: Source {0} (resolved to path {1}) doesn't exists", source.GetDebugName(), source.GetPath());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return(Stream.Null);
}
if (!source.SupportsDirectAccess)
{
Log.Warn("ExtractImage: Extracting images from remote sources isn't supported yet", source.MediaType, source.Id);
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotImplemented);
return(Stream.Null);
}
// get temporary filename
string filename = String.Format("extract_{0}_{1}.jpg", source.GetUniqueIdentifier(), position);
string tempFile = cache.GetPath(filename);
// maybe it exists in cache, return that then
if (cache.Contains(filename))
{
// if source is newer, cached image needs to be recreated
if (source.GetFileInfo().LastModifiedTime > cache.GetLastModifiedTime(tempFile))
{
cache.Invalidate(filename);
}
else
{
return(StreamPostprocessedImage(new ImageMediaSource(tempFile), maxWidth, maxHeight, borders, format));
}
}
// We need to impersonate to access the network drive and check if the thumbnail already exists. However, because
// impersonation is lost when starting a process, we can't start ffmpeg from in here. We need to check whether the
// file is accessible from outside the impersonation context again, and start the ffmpeg process as a different user
// if that is the case.
string fullPath;
using (var context = source.CreateNetworkContext())
{
fullPath = context.RewritePath(source.GetPath());
// stream a pre-existing thumbnail, if possible
if (source.MediaType == WebMediaType.Recording && Path.GetExtension(fullPath).ToLower() == ".ts")
{
var thumbnailFileInfo = new FileInfo(Path.ChangeExtension(fullPath, ".jpg"));
if (thumbnailFileInfo.Exists && thumbnailFileInfo.Length > 0)
{
return(StreamPostprocessedImage(new ImageMediaSource(thumbnailFileInfo.FullName), maxWidth, maxHeight, borders, format));
}
}
}
// finally, extract the image with ffmpeg if everything else has failed
bool extractResult = ExecuteFFMpegExtraction(source, fullPath, position, tempFile);
if (!extractResult)
{
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.InternalServerError);
return(Stream.Null);
}
return(StreamPostprocessedImage(new ImageMediaSource(tempFile), maxWidth, maxHeight, borders, format));
}
public static Stream ExtractImage(MediaSource source, long position, int? maxWidth, int? maxHeight, string borders, string format)
{
if (!source.Exists)
{
Log.Warn("ExtractImage: Source {0} (resolved to path {1}) doesn't exists", source.GetDebugName(), source.GetPath());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return Stream.Null;
}
if (!source.SupportsDirectAccess)
{
Log.Warn("ExtractImage: Extracting images from remote sources isn't supported yet", source.MediaType, source.Id);
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotImplemented);
return Stream.Null;
}
// get temporary filename
string filename = String.Format("extract_{0}_{1}.jpg", source.GetUniqueIdentifier(), position);
string tempFile = cache.GetPath(filename);
// maybe it exists in cache, return that then
if (cache.Contains(filename))
{
// if source is newer, cached image needs to be recreated
if (source.GetFileInfo().LastModifiedTime > cache.GetLastModifiedTime(tempFile))
{
cache.Invalidate(filename);
}
else
{
return StreamPostprocessedImage(new ImageMediaSource(tempFile), maxWidth, maxHeight, borders, format);
}
}
// We need to impersonate to access the network drive and check if the thumbnail already exists. However, because
// impersonation is lost when starting a process, we can't start ffmpeg from in here. We need to check whether the
// file is accessible from outside the impersonation context again, and start the ffmpeg process as a different user
// if that is the case.
string fullPath;
using (var context = source.CreateNetworkContext())
{
fullPath = context.RewritePath(source.GetPath());
// stream a pre-existing thumbnail, if possible
if (source.MediaType == WebMediaType.Recording && Path.GetExtension(fullPath).ToLower() == ".ts")
{
var thumbnailFileInfo = new FileInfo(Path.ChangeExtension(fullPath, ".jpg"));
if (thumbnailFileInfo.Exists && thumbnailFileInfo.Length > 0)
return StreamPostprocessedImage(new ImageMediaSource(thumbnailFileInfo.FullName), maxWidth, maxHeight, borders, format);
}
}
// finally, extract the image with ffmpeg if everything else has failed
bool extractResult = ExecuteFFMpegExtraction(source, fullPath, position, tempFile);
if (!extractResult)
{
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.InternalServerError);
return Stream.Null;
}
return StreamPostprocessedImage(new ImageMediaSource(tempFile), maxWidth, maxHeight, borders, format);
}
public bool InitStream(string identifier, string clientDescription, MediaSource source)
{
if (!source.Exists)
{
Log.Warn("Tried to start stream for non-existing file {0}", source.GetDebugName());
return false;
}
ActiveStream stream = new ActiveStream();
stream.Identifier = identifier;
stream.ClientDescription = clientDescription;
stream.ClientIP = WCFUtil.GetClientIPAddress();
stream.StartTime = DateTime.Now;
stream.Context = new StreamContext();
stream.Context.Source = source;
stream.Context.IsTv = source.MediaType == WebStreamMediaType.TV;
lock (Streams)
{
Streams[identifier] = stream;
}
return true;
}
public bool InitStream(string identifier, string clientDescription, MediaSource source, int timeout)
{
if (!source.Exists)
{
StreamLog.Warn(identifier, "Tried to start stream for non-existing file {0}", source.GetDebugName());
return false;
}
ActiveStream stream = new ActiveStream();
stream.Identifier = identifier;
stream.ClientDescription = clientDescription;
stream.StartTime = DateTime.Now;
stream.Timeout = timeout;
stream.LastActivity = DateTime.Now;
stream.UseActivityForTimeout = false;
stream.Context = new StreamContext();
stream.Context.Identifier = identifier;
stream.Context.Source = source;
stream.Context.IsTv = source.MediaType == WebMediaType.TV;
// Some clients such as WebMP proxy the streams before relying it to the client. We should give these clients the option to
// forward the real IP address, so that we can show that one in the configurator too. However, to avoid abuse, we should show
// the real IP of the client too, so make up some nice text string.
string realIp = WCFUtil.GetHeaderValue("forwardedFor", "X-Forwarded-For");
stream.ClientIP = realIp == null ? WCFUtil.GetClientIPAddress() : String.Format("{0} (via {1})", realIp, WCFUtil.GetClientIPAddress());
Streams[identifier] = stream;
return true;
}
public Stream GetMediaItem(WebStreamMediaType type, int? provider, string itemId)
{
MediaSource source = new MediaSource(type, provider, itemId);
try
{
if (!source.Exists)
{
throw new FileNotFoundException();
}
WCFUtil.AddHeader("Content-Disposition", "attachment; filename=\"" + source.GetFileInfo().Name + "\"");
// there has to be a better way to do this
object mime = RegistryReader.ReadKey(Microsoft.Win32.RegistryHive.ClassesRoot, Path.GetExtension(source.GetFileInfo().Name), "Content Type");
if (mime != null)
{
WCFUtil.AddHeader("Content-Type", mime.ToString());
}
return source.Retrieve();
}
catch (Exception ex)
{
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
Log.Info(String.Format("GetMediaItem() failed for {0}", source.GetDebugName()), ex);
return Stream.Null;
}
}
