/// <summary>
/// Finds all playlists that contains a given track.
/// </summary>
/// <param name="track">The track to look for</param>
/// <returns>All playlists containing <paramref name="track"/></returns>
public static List<PlaylistData> Has(TrackData track)
{
List<PlaylistData> has = new List<PlaylistData>();
foreach (PlaylistData p in SettingsManager.Playlists)
if (Contains(p, track))
has.Add(p);
return has;
}
/// <summary>
/// Copies a TrackData into a ConfigTrack
/// </summary>
/// <param name="track">The track to be copied</param>
/// <returns>The track as a configuration structure</returns>
private static ConfigTrack ExportTrack(TrackData track)
{
if (track == null) return null;
return new ConfigTrack() { Path = track.Path, PlayCount = track.PlayCount, LastPlayed = track.LastPlayed };
}
/// <summary>
/// Retrieves the URL to the thumbnail for a Jamendo track.
/// </summary>
/// <param name="track">The Jamendo track</param>
public static string GetThumbnail(TrackData track)
{
return track.ArtURL;
}
/// <summary>
/// Initializes a new instance of the <see cref="SourcesModifiedEventArgs"/> class
/// </summary>
/// <param name="track">The track that was either added or removed</param>
/// <param name="modType">The modification type of the source</param>
/// <param name="callback">The callbacks and their respective parameters which to call when the event is handled</param>
public SourceModifiedEventArgs(TrackData track, SourceModificationType modType, List<KeyValuePair<ScannerCallback, object>> callbacks)
{
Track = track;
ModificationType = modType;
Callbacks = callbacks;
}
/// <summary>
/// Copy all metadata from one track to another
/// </summary>
/// <param name="source">The source track from which the metadata is copied</param>
/// <param name="destination">The destination track to which the metadata is copied</param>
private static void CopyTrackInfo(TrackData source, TrackData destination)
{
destination.Artist = source.Artist;
destination.Album = source.Album;
destination.Genre = source.Genre;
destination.Title = source.Title;
destination.Track = source.Track;
destination.Year = source.Year;
destination.Length = source.Length;
destination.LastWrite = source.LastWrite;
destination.Bitrate = source.Bitrate;
destination.Views = source.Views;
destination.Icon = source.Icon;
destination.Codecs = source.Codecs;
destination.Channels = source.Channels;
destination.SampleRate = source.SampleRate;
}
/// <summary>
/// The dispatcher of the <see cref="FilesystemManager.SourcesModified"/> event
/// </summary>
/// <param name="track">The track that was either added, removed or updated</param>
/// <param name="modType">The modification type of the source</param>
/// <param name="callback">The callbacks and their respective parameters that will be sent along with the SourceModified event</param>
private static void DispatchSourceModified(TrackData track, SourceModificationType modType, List<KeyValuePair<ScannerCallback, object>> callbacks)
{
if (SourceModified != null)
SourceModified(null, new SourceModifiedEventArgs(track, modType, callbacks));
}
/// <summary>
/// Checks if the meta data of a track has been updated since last read.
/// </summary>
/// <param name="track">The track to check</param>
/// <returns>True if the track has been written to since last read</returns>
public static bool Updated(TrackData track)
{
try
{
FileInfo fInfo = new FileInfo(track.Path);
return fInfo.LastWriteTimeUtc.Ticks > track.LastWrite;
}
catch
{
return false;
}
}
/// <summary>
/// Starts playback of the media player.
/// </summary>
/// <param name="track">The track to start playing</param>
private static void Start(TrackData track)
{
//U.L(LogLevel.Information, "MEDIA", "Playing " + track.Path);
// remove the song if it's in the queue
if (SettingsManager.QueueTracks.Contains(track))
{
U.L(LogLevel.Debug, "MEDIA", "Remove track from queue");
SettingsManager.QueueTracks.Remove(track);
foreach (TrackData trackInQueue in SettingsManager.QueueTracks)
trackInQueue.Number = SettingsManager.QueueTracks.IndexOf(trackInQueue) + 1;
}
ThreadStart PlayThread = delegate()
{
trackWasSkipped = false;
// add song to played/recent list
songsAlreadyPlayed.Add(track);
TrackType type = GetType(track);
if (stream != 0)
Bass.BASS_StreamFree(stream);
stream = 0;
switch (type)
{
case TrackType.YouTube:
string vid = YouTubeManager.GetYouTubeID(track.Path);
InvokeScript("setVolume", new object[] { SettingsManager.Volume });
SettingsManager.MediaState = MediaState.Stopped;
InvokeScript("loadNewVideo", new object[] { vid, 0 });
break;
case TrackType.File:
stream = Bass.BASS_StreamCreateFile(track.Path, 0, 0, BASSFlag.BASS_SAMPLE_FLOAT);
break;
case TrackType.SoundCloud:
stream = Bass.BASS_StreamCreateURL(SoundCloudManager.GetStreamURL(track), 0, BASSFlag.BASS_SAMPLE_FLOAT, null, IntPtr.Zero);
break;
case TrackType.Jamendo:
stream = Bass.BASS_StreamCreateURL(JamendoManager.GetStreamURL(track), 0, BASSFlag.BASS_SAMPLE_FLOAT, null, IntPtr.Zero);
break;
case TrackType.WebRadio:
stream = Bass.BASS_StreamCreateURL(track.Path, 0, BASSFlag.BASS_SAMPLE_FLOAT, null, IntPtr.Zero);
break;
default:
U.L(LogLevel.Error, "MEDIA", "Unsupported track type: " + type);
break;
}
if (stream != 0)
{
// set some fx
SetFX();
Bass.BASS_ChannelRemoveSync(stream, syncer);
syncer = Bass.BASS_ChannelSetSync(stream, BASSSync.BASS_SYNC_END, 0, sync, IntPtr.Zero);
Bass.BASS_Start();
Bass.BASS_ChannelPlay(stream, true);
if (type == TrackType.File)
{
double p = SettingsManager.Seek;
Bass.BASS_ChannelSetPosition(stream, (long)((p / 10.0) * Bass.BASS_ChannelGetLength(stream)));
}
}
SettingsManager.CurrentTrack = track;
if ((YouTubeManager.IsYouTube(track.Path) && YouTubeManager.HasFlash) ||
stream != 0)
SettingsManager.MediaState = MediaState.Playing;
loadedTrack = null;
PlaylistManager.TrackWasPlayed(SettingsManager.CurrentTrack);
DispatchStarted();
};
Thread play_thread = new Thread(PlayThread);
play_thread.Name = "Playback";
play_thread.IsBackground = true;
play_thread.Priority = ThreadPriority.BelowNormal;
play_thread.Start();
}
/// <summary>
/// Creates an instance of the TrackSwitchedEventArgs class
/// </summary>
/// <param name="oldTrack">The track before the switch</param>
/// <param name="newTrack">The track after the switch</param>
public TrackSwitchedEventArgs(TrackData oldTrack, TrackData newTrack)
{
OldTrack = oldTrack;
NewTrack = newTrack;
}
/// <summary>
/// The dispatcher of the <see cref="LoadedTrack"/> event.
/// </summary>
/// <param name="track">The track that was loaded</param>
private static void DispatchLoadedTrack(TrackData track)
{
if (LoadedTrack != null)
LoadedTrack(track);
}
/// <summary>
/// The dispatcher of the <see cref="TrackSwitched"/> event.
/// </summary>
/// <param name="oldTrack">The track before the switch</param>
/// <param name="newTrack">The track after the switch</param>
private static void DispatchTrackSwitched(TrackData oldTrack, TrackData newTrack)
{
if (TrackSwitched != null)
TrackSwitched(new TrackSwitchedEventArgs(oldTrack, newTrack));
}
/// <summary>
/// Stops playback
/// </summary>
public static void Stop()
{
SettingsManager.CurrentTrack = null;
loadedTrack = null;
if (YouTubeManager.HasFlash)
InvokeScript("pause");
SettingsManager.MediaState = MediaState.Stopped;
SettingsManager.Seek = 0;
Bass.BASS_Stop();
Bass.BASS_StreamFree(stream);
stream = 0;
}
/// <summary>
/// Plays the currently loaded track if there is one
/// or continue playing current track if there is one
/// </summary>
public static void Play()
{
if (SettingsManager.MediaState == MediaState.Playing) return;
if (loadedTrack != null)
Start(loadedTrack);
else if (SettingsManager.CurrentTrack != null)
{
if (YouTubeManager.IsYouTube(SettingsManager.CurrentTrack))
{
if (YouTubeManager.HasFlash)
InvokeScript("play");
}
else if (stream != 0)
{
Bass.BASS_Start();
SettingsManager.MediaState = MediaState.Playing;
}
else
{
DispatchStarted();
return;
}
StartTicker();
loadedTrack = null;
DispatchStarted();
}
}
/// <summary>
/// Update the "Last Played" and "Play Count" information of a given track
/// </summary>
/// <param name="RefTrack">The track that was just played</param>
public static void TrackWasPlayed(TrackData RefTrack)
{
if (RefTrack == null) return;
uint pc = RefTrack.PlayCount + 1;
foreach (TrackData track in SettingsManager.FileTracks)
{
if (track.Path == RefTrack.Path)
{
track.PlayCount = pc;
track.LastPlayed = DateTime.Now;
}
}
foreach (TrackData track in SettingsManager.QueueTracks)
{
if (track.Path == RefTrack.Path)
{
track.PlayCount = pc;
track.LastPlayed = DateTime.Now;
}
}
foreach (TrackData track in SettingsManager.HistoryTracks)
if (track.Path == RefTrack.Path)
track.PlayCount = pc;
foreach (PlaylistData playlist in SettingsManager.Playlists)
{
if (playlist.Name == CurrentPlaylist)
{
foreach (TrackData track in playlist.Tracks)
{
if (track.Path == RefTrack.Path)
{
track.PlayCount = pc;
track.LastPlayed = DateTime.Now;
}
}
}
}
}
/// <summary>
/// Writes the current track data to the file
/// </summary>
/// <param name="track">The track to save</param>
public static void SaveTrack(TrackData track)
{
TagLib.File file = TagLib.File.Create(track.Path);
file.Tag.Performers = track.Artist.Split(',');
file.Tag.Album = track.Album;
file.Tag.Title = track.Title;
file.Tag.Year = Convert.ToUInt32(track.Year);
file.Tag.Genres = track.Genre.Split(',');
file.Tag.Track = Convert.ToUInt32(track.Track);
file.Save();
UpdateTrack(track);
}
/// <summary>
/// Finds the track inside the library from which a given track originates
/// </summary>
/// <param name="track">The track find the library source for</param>
/// <returns>The track that was the original source, inside the library, for <b>track</b>, or <b>track</b> if no such track was found</returns>
public static TrackData GetLibrarySourceTrack(TrackData track)
{
foreach (TrackData t in SettingsManager.FileTracks)
if (t.Path == track.Path)
return t;
return track;
}
/// <summary>
/// The dispatcher of the <see cref="FilesystemManager.SourcesModified"/> event
/// </summary>
/// <param name="track">The track that was either added, removed or updated</param>
/// <param name="modType">The modification type of the source</param>
private static void DispatchSourceModified(TrackData track, SourceModificationType modType)
{
DispatchSourceModified(track, modType, new List<KeyValuePair<ScannerCallback, object>>());
}
/// <summary>
/// Finds the original source track, inside the library or a playlist, from which a given track originates
/// </summary>
/// <param name="track">The track to find the source for</param>
/// <returns>The track that was the original source for <b>track</b>, or <b>track</b> if no such track was found</returns>
public static TrackData GetSourceTrack(TrackData track)
{
if (track == null) return null;
if (track.Source != null && track.Source.StartsWith("Playlist:"))
{
PlaylistData p = PlaylistManager.FindPlaylist(track.Source.Split(new[]{':'},2)[1]);
if (p != null)
foreach (TrackData t in p.Tracks)
if (t.Path == track.Path)
return t;
}
foreach (TrackData t in SettingsManager.FileTracks)
if (t.Path == track.Path)
return t;
return track;
}
/// <summary>
/// The dispatcher of the <see cref="TrackModified"/> event
/// </summary>
/// <param name="track">The track that was modified</param>
/// <param name="e">The event data</param>
private static void DispatchTrackModified(TrackData track, PropertyChangedEventArgs e)
{
if (TrackModified != null)
TrackModified(track, e);
}
/// <summary>
/// Gets the type of a track.
/// </summary>
/// <param name="track">The track to get the type of</param>
/// <returns>The type of the given track</returns>
public static TrackType GetType(TrackData track)
{
if (track != null)
return GetType(track.Path);
else
return TrackType.Unknown;
}
/// <summary>
/// Reads the metadata of a track and updates it
/// </summary>
/// <param name="track">The track to update</param>
/// <param name="copy">Whether the data should be copied to queue/history/playlists</param>
public static void UpdateTrack(TrackData track, bool copy = true)
{
if (!Updated(track)) return;
try
{
TagLib.File file = TagLib.File.Create(track.Path, TagLib.ReadStyle.Average);
track.Artist = U.CleanXMLString(file.Tag.JoinedPerformers);
track.Album = U.CleanXMLString(file.Tag.Album);
track.Title = U.CleanXMLString(file.Tag.Title);
track.Genre = U.CleanXMLString(file.Tag.JoinedGenres);
track.Track = file.Tag.Track;
track.Year = file.Tag.Year;
track.Length = file.Properties.Duration.TotalMilliseconds / 1000.0;
track.Bitrate = file.Properties.AudioBitrate;
track.Channels = file.Properties.AudioChannels;
track.SampleRate = file.Properties.AudioSampleRate;
track.Codecs = "";
foreach (TagLib.ICodec c in file.Properties.Codecs)
if (c != null)
track.Codecs += c.Description + ", ";
track.Codecs = track.Codecs.Substring(0, track.Codecs.Length - 2);
}
catch (Exception e)
{
if (track.Artist == U.T("MetaDataLoading")) track.Artist = "";
if (track.Album == U.T("MetaDataLoading")) track.Album = "";
if (track.Title == U.T("MetaDataLoading")) track.Title = "";
if (track.Genre == U.T("MetaDataLoading")) track.Genre = "";
U.L(LogLevel.Warning, "FILESYSTEM", "Could not read ID3 data of file: " + track.Path);
U.L(LogLevel.Warning, "FILESYSTEM", e.Message);
}
try
{
FileInfo fInfo = new FileInfo(track.Path);
track.LastWrite = fInfo.LastWriteTimeUtc.Ticks;
if (String.IsNullOrWhiteSpace(track.Title))
{
track.Title = Path.GetFileNameWithoutExtension(track.Path);
track.Title = track.Title.Trim();
string s = Regex.Replace(track.Title, @"^(\d+\s)+", "");
if (!String.IsNullOrWhiteSpace(s))
track.Title = s;
track.Title = U.PrettifyTag(track.Title);
}
}
catch (Exception e)
{
U.L(LogLevel.Warning, "FILESYSTEM", "Could not access file: " + track.Path);
U.L(LogLevel.Warning, "FILESYSTEM", e.Message);
}
track.Icon = "pack://application:,,,/Platform/Windows 7/GUI/Images/Icons/FileAudio.ico";
track.Processed = true;
if (!copy) return;
for (int i = 0; i < SettingsManager.FileTracks.Count; i++)
{
if (SettingsManager.FileTracks[i].Path == track.Path)
{
CopyTrackInfo(track, SettingsManager.FileTracks[i]);
break;
}
}
for (int i = 0; i < SettingsManager.QueueTracks.Count; i++)
{
if (SettingsManager.QueueTracks[i].Path == track.Path)
{
CopyTrackInfo(track, SettingsManager.QueueTracks[i]);
break;
}
}
for (int i = 0; i < SettingsManager.HistoryTracks.Count; i++)
{
if (SettingsManager.HistoryTracks[i].Path == track.Path)
{
CopyTrackInfo(track, SettingsManager.HistoryTracks[i]);
break;
}
}
foreach (PlaylistData p in SettingsManager.Playlists)
for (int i = 0; i < p.Tracks.Count; i++)
{
if (p.Tracks[i].Path == track.Path)
{
CopyTrackInfo(track, p.Tracks[i]);
break;
}
}
}
/// <summary>
/// Returns a localized string describing the type of the track
/// </summary>
/// <param name="track">The track</param>
/// <param name="plural">Whether or not plural is used</param>
/// <returns>A localized string describing the type of the track</returns>
public static string HumanTrackType(TrackData track, bool plural = false)
{
string t = plural ? "Plural" : "Text";
switch (GetType(track))
{
case TrackType.YouTube:
return U.T("FileTypeYouTube", t);
case TrackType.WebRadio:
return U.T("FileTypeRadio", t);
case TrackType.SoundCloud:
return U.T("FileTypeSoundCloud", t);
case TrackType.Jamendo:
return U.T("FileTypeJamendo", t);
case TrackType.File:
string ext = Path.GetExtension(track.Path).ToUpper().Substring(1);
return String.Format(U.T("FileTypeExtension", t), ext);
default:
return U.T("FileTypeUnknown", t);
}
}
/// <summary>
/// Create a track given a filename
/// </summary>
/// <param name="filename">The filename of the track</param>
/// <param name="dispatchModified">Whether or not to dispatch that the track has been added</param>
/// <returns>The newly created track</returns>
public static TrackData CreateTrack(String filename, bool dispatchModified = true)
{
if (!MediaManager.IsSupported(filename))
{
U.L(LogLevel.Warning, "FILESYSTEM", "Cannot create track " + filename + ": unsupported format");
return null;
}
if (!File.Exists(filename))
{
U.L(LogLevel.Warning, "FILESYSTEM", "Cannot create track " + filename + ": file does not exist");
return null;
}
FileInfo fInfo = new FileInfo(filename);
TrackData track = new TrackData
{
Processed = false,
Artist = U.T("MetaDataLoading"),
Album = U.T("MetaDataLoading"),
Title = U.T("MetaDataLoading"),
Genre = U.T("MetaDataLoading"),
Year = 0,
Length = 0.0,
PlayCount = 0,
Track = 0,
Path = filename,
Bitrate = 0,
Channels = 0,
SampleRate = 0,
Codecs = "",
Number = 0,
Bookmarks = new List<double>(),
Source = "Files",
Icon = @"..\..\Platform\Windows 7\GUI\Images\Icons\FileAudio.ico",
LastWrite = 0
};
track.PropertyChanged += new PropertyChangedEventHandler(Track_PropertyChanged);
if (dispatchModified)
DispatchSourceModified(track, SourceModificationType.Added);
return track;
}
/// <summary>
/// Initialize the manager
/// </summary>
public static void Initialize()
{
U.L(LogLevel.Debug, "MEDIA", "Init BASS");
FFTData = new float[1024];
BassNet.Registration(U.BassMail, U.BassKey);
StartTicker();
sync = new SYNCPROC(EndPosition);
if (SettingsManager.HistoryIndex > SettingsManager.HistoryTracks.Count)
SettingsManager.HistoryIndex = SettingsManager.HistoryTracks.Count - 1;
Bass.BASS_SetConfig(BASSConfig.BASS_CONFIG_DEV_DEFAULT, true);
Bass.BASS_Init(-1, 44100, 0, (IntPtr)0);
U.L(LogLevel.Debug, "MEDIA", "Load codecs");
// load codecs
string codecDir = Path.Combine(U.BasePath, "Codecs");
Dictionary<int, string> loadedPlugins = Bass.BASS_PluginLoadDirectory(codecDir);
supportedFormatsFilter = Utils.BASSAddOnGetSupportedFileFilter(loadedPlugins, "All supported audio files", true);
supportedFormatsExtensions = Utils.BASSAddOnGetSupportedFileExtensions(loadedPlugins, true);
// remove .mov and .mp4 cause they don't work anyway :(
supportedFormatsExtensions = SupportedFormatsExtensions.Replace("*.mov;", "");
supportedFormatsExtensions = SupportedFormatsExtensions.Replace("*.mp4;", "");
IsInitialized = true;
SettingsManager.PropertyChanged += SettingsManager_PropertyChanged;
SettingsManager.MediaState = MediaState.Paused;
loadedTrack = SettingsManager.CurrentTrack;
U.L(LogLevel.Debug, "MEDIA", "Initialized");
}
/// <summary>
/// Add a file to the collection
/// </summary>
/// <param name="filename">The path of the file</param>
/// <param name="scanMetaData">Whether to scan the tracks meta data as well</param>
/// <param name="callbacks">The callbacks and their respective parameters that will be sent along with the SourceModified event</param>
private static void AddFile(String filename, bool scanMetaData, List<KeyValuePair<ScannerCallback, object>> callbacks)
{
FileInfo fInfo = new FileInfo(filename);
TrackData track = new TrackData
{
Processed = false,
Artist = U.T("MetaDataLoading"),
Album = U.T("MetaDataLoading"),
Title = U.T("MetaDataLoading"),
Genre = U.T("MetaDataLoading"),
Year = 0,
Length = 0.0,
PlayCount = 0,
Bitrate = 0,
Channels = 0,
SampleRate = 0,
Codecs = "",
Track = 0,
Path = fInfo.FullName,
Number = 0,
Icon = @"..\..\Platform\Windows 7\GUI\Images\Icons\FileAudio.ico",
LastWrite = 0
};
DispatchSourceModified(track, SourceModificationType.Added, callbacks);
track.PropertyChanged += new PropertyChangedEventHandler(Track_PropertyChanged);
if (scanMetaData)
DispatchPathModified(track.Path);
}
/// <summary>
/// Loads a track to be played
/// </summary>
/// <param name="track">Track to be played</param>
/// <param name="moveForward">If true then increase HistoryIndex (and potentially add track to History), otherwise decrease it</param>
/// <seealso cref="Play"/>
public static void Load(TrackData track, bool moveForward = true)
{
if (moveForward)
DispatchLoadedTrack(track);
else
SettingsManager.HistoryIndex--;
loadedTrack = track;
}
/// <summary>
/// Retrieves the stream URL for a Jamendo track
/// </summary>
/// <param name="track">The Jamendo track</param>
public static string GetStreamURL(TrackData track)
{
return String.Format("http://storage-new.newjamendo.com/?trackid={0}&format=mp31&u=0", GetID(track.Path));
}
/// <summary>
/// Parses a URL and extract meta data.
/// </summary>
/// <param name="URL">The URL to parse</param>
/// <returns>The track representing the audio at the URL</returns>
public static TrackData ParseURL(string URL)
{
TrackData track = new TrackData()
{
PlayCount = 0,
Source = "Radio",
Icon = @"..\..\Platform\Windows 7\GUI\Images\Icons\Radio.ico",
};
track.Path = URL;
int stream = Un4seen.Bass.Bass.BASS_StreamCreateURL(URL, 0, Un4seen.Bass.BASSFlag.BASS_SAMPLE_FLOAT, null, IntPtr.Zero);
if (stream != 0)
{
//Un4seen.Bass.Bass.BASS_ChannelPlay(stream, true);
string[] tags = Bass.BASS_ChannelGetTagsICY(stream);
SortedList<string, string> meta = new SortedList<string, string>();
if (tags != null && tags.Length > 0)
{
foreach (string tag in tags)
{
string[] s = tag.Split(new char[] { ':' }, 2);
if (s.Length == 2)
meta.Add(s[0], s[1]);
}
if (meta.Keys.Contains("icy-name"))
track.Title = meta["icy-name"];
if (meta.Keys.Contains("icy-genre"))
track.Genre = meta["icy-genre"];
if (meta.Keys.Contains("icy-url"))
track.URL = meta["icy-url"];
}
}
return track;
}
/// <summary>
/// Parses a JSON object into a track.
/// </summary>
/// <param name="json">The JSON data</param>
/// <returns>A track</returns>
private static TrackData ParseTrack(JObject json)
{
if (json == null) return null;
try
{
TrackData track = new TrackData();
track.Icon = "pack://application:,,,/Platform/Windows 7/GUI/Images/Icons/Jamendo.ico";
track.Path = String.Format("{0}{1}", pathPrefix, json["id"]);
track.Title = (string)json["name"];
track.Genre = (string)json["genre"];
track.URL = (string)json["url"];
track.Artist = (string)json["artist_name"];
track.Album = (string)json["album_name"];
int d = (int)json["duration"];
track.Length = (double)d;
if (json["image"].Type == JTokenType.String)
track.ArtURL = (string)json["image"];
else if (json["album_image"].Type == JTokenType.String)
track.ArtURL = (string)json["album_image"];
else if (json["artist_image"].Type == JTokenType.String)
track.ArtURL = (string)json["artist_image"];
track.Image = track.ArtURL;
if (track.Image == null || track.Image == "")
track.Image = track.Icon;
return track;
}
catch (Exception e)
{
U.L(LogLevel.Warning, "JAMENDO", "Could not parse track JSON data: " + e.Message);
return null;
}
}
/// <summary>
/// Checks whether a given playlist contains a given track.
/// </summary>
/// <param name="playlist">The playlist to search in</param>
/// <param name="track">The track to search for</param>
/// <returns>True of <paramref name="playlist"/> contains <paramref name="track"/>, otherwise false</returns>
public static bool Contains(PlaylistData playlist, TrackData track)
{
foreach (TrackData t in playlist.Tracks)
if (t.Path == track.Path)
return true;
return false;
}