/// <summary>Reads the album and artist data from specified media file or folder, and adds it to the <see cref="mAlbums"/> collection.</summary>
/// <param name="filePathPattern">Use null to use the ID3 tags instead</param>
/// <returns>The <see cref="Album"/> that was added to <see cref="mAlbums"/>, or <c>null</c> if none could be read.</returns>
private Album ReadMediaFile(FileSystemInfo file, Regex filePathPattern)
{
if (file is DirectoryInfo && filePathPattern == null) //If a DirectoryInfo is used, then the filePathPattern must have ended in \.
{
throw new ArgumentException("Directories are only supported for pattern matching, not ID3 tags", "file");
}
Dispatcher.BeginInvoke(DispatcherPriority.DataBind, new ThreadStart(delegate
{
ProgressText = "Searching... " + file.Name;
}));
string artistName = null;
string albumName = null;
int? embeddedArtIndex = null;
if (filePathPattern == null)
{
//Read ID3 Tags
TagLib.File fileTags = null;
try
{
fileTags = TagLib.File.Create(file.FullName, TagLib.ReadStyle.None);
if (fileTags.Tag.AlbumArtists.Length == 0)
{
artistName = String.Join(" / ", fileTags.Tag.Performers);
}
else
{
artistName = String.Join(" / ", fileTags.Tag.AlbumArtists);
}
albumName = fileTags.Tag.Album;
var embeddedPictures = fileTags.Tag.Pictures;
if (embeddedPictures.Length > 0)
{
//There's an embedded picture
//Check to see if there's a picture described as the front cover, to use in preference
for (int i = 0; i < embeddedPictures.Length; i++)
{
if (embeddedPictures[i].Type == TagLib.PictureType.FrontCover)
{
embeddedArtIndex = i;
break;
}
}
if (!embeddedArtIndex.HasValue)
{
//None of the embedded pictures were tagged as "FrontCover", so just use the first picture
embeddedArtIndex = 0;
}
}
}
catch (Exception e)
{
System.Diagnostics.Trace.WriteLine("TagLib# could not get artist and album information for file: " + file.FullName);
System.Diagnostics.Trace.Indent();
System.Diagnostics.Trace.WriteLine(e.Message);
System.Diagnostics.Trace.Unindent();
return(null); //If this media file couldn't be read, just go on to the next one.
}
finally
{
if (fileTags != null)
{
fileTags.Mode = TagLib.File.AccessMode.Closed;
}
}
}
else
{
//Read from file path
Match match = filePathPattern.Match(file.FullName);
if (match.Success)
{
artistName = match.Groups["artist"].Value;
albumName = match.Groups["album"].Value;
}
}
if (!(String.IsNullOrEmpty(artistName) && String.IsNullOrEmpty(albumName))) //No point adding it if no artist or album could be found.
{
string basePath;
if (file is FileInfo)
{
basePath = ((FileInfo)file).DirectoryName;
}
else
{
System.Diagnostics.Debug.Assert(file is DirectoryInfo, "Expecting file to be one of FileInfo or DirectoryInfo");
basePath = ((DirectoryInfo)file).FullName;
}
Album album = new Album(basePath, artistName, albumName);
if (embeddedArtIndex.HasValue)
{
//Read the picture from the data
album.SetArtFile(EmbeddedArtHelpers.GetEmbeddedFilePath(file.FullName, embeddedArtIndex.Value));
}
Dispatcher.Invoke(DispatcherPriority.DataBind, new ThreadStart(delegate
{
mAlbums.Add(album);
}));
return(album);
}
return(null);
}
/// <summary>
/// Checks through a set of albums for those that should be concatenated into a single Various Artists album.
/// </summary>
/// <param name="addedAlbums"></param>
private void DetectVariousArtistsAlbums(IList <Album> albums)
{
//Get the albums in each folder
Dictionary <String, List <Album> > folders = new Dictionary <string, List <Album> >(albums.Count);
foreach (Album album in albums)
{
if (album != null)
{
List <Album> folderAlbums;
if (!folders.TryGetValue(album.BasePath, out folderAlbums))
{
folderAlbums = new List <Album>(albums.Count);
folders.Add(album.BasePath, folderAlbums);
}
folderAlbums.Add(album);
}
}
foreach (List <Album> folder in folders.Values)
{
//If the folder contains all the same album name, but different artists, then it is VA
string albumName = folder[0].Name;
string artist = folder[0].Artist;
string basePath = folder[0].BasePath;
bool variousArtists = false;
foreach (Album album in folder)
{
if (album.Name != albumName)
{
//This is not all the same album
variousArtists = false;
break;
}
if (!variousArtists && album.Artist != artist)
{
variousArtists = true;
}
}
if (variousArtists)
{
//This is a various artists album, so replace them with a single Various Artists album
Dispatcher.Invoke(DispatcherPriority.DataBind, new ThreadStart(delegate
{
Album variousArtistsAlbum = new Album(basePath, sVariousArtistsName, albumName);
if (!mAlbums.Contains(variousArtistsAlbum)) //If this album already exists, no need to add it again.
{
//Add replacement VA album
mAlbums.Insert(mAlbums.IndexOf(folder[0]), variousArtistsAlbum);
}
//Remove individual albums, but copy art from at least one of them (if present)
foreach (Album album in folder)
{
if (album.Artist != sVariousArtistsName) //If, by chance, one of the albums was already called "Various Artists", then it will have merged with the newly added one.
{
if (variousArtistsAlbum.ArtFileStatus != ArtFileStatus.Present && album.ArtFile != null)
{
variousArtistsAlbum.SetArtFile(album.ArtFile);
}
mAlbums.Remove(album);
}
}
}));
}
}
}
private void SearchWorker()
{
Album album = null;
Dispatcher.Invoke(DispatcherPriority.Send, new ThreadStart(delegate
{
album = mQueueList.GetNextAlbum();
IsSearching = true;
}));
while (album != null)
{
album.ArtFileStatus = ArtFileStatus.Searching;
Dispatcher.BeginInvoke(DispatcherPriority.DataBind, new ThreadStart(delegate
{
if (mQueueList.ShouldAutoscroll)
{
mQueueList.ScrollIntoView(album);
}
}));
try
{
List <Source> currentSourcesToSearch;
lock (mSourcesToSearch)
{
//Take a copy of the source list so that it doesn't get affected by changes)
currentSourcesToSearch = new List <Source>(mSourcesToSearch);
}
foreach (var source in currentSourcesToSearch) //Try each source in turn
{
Dispatcher.BeginInvoke(DispatcherPriority.DataBind, new ThreadStart(delegate
{
ProgressText = String.Format("Searching {0} for {1} / {2}", source.Name, album.Artist, album.Name);
}));
source.Results.CollectionChanged += OnSourceFoundResult;
source.QueryContinueSearch += OnSourceQueryContinue;
source.SearchCompleted += OnSourceSearchComplete;
mWaitForSourceCompleted.Reset();
Dispatcher.BeginInvoke(DispatcherPriority.Normal, new ThreadStart(delegate
{
//source.Search must be done in the main dispatcher thread, as that's the thread which the observable collection will be updated on.
source.Search(album.Artist, album.Name);
}));
//Wait for the source to have finished searching
mWaitForSourceCompleted.WaitOne();
System.Diagnostics.Debug.Assert(source.IsSearching == false, "Source is supposed to have completed by now");
//Done with this source - stop listening to its events.
source.Results.CollectionChanged -= OnSourceFoundResult;
source.QueryContinueSearch -= OnSourceQueryContinue;
source.SearchCompleted -= OnSourceSearchComplete;
//Was a valid result found in this source?
if (mSearchResult != null)
{
var observableCollectionOfDisposables = source.Results as ObservableCollectionOfDisposables <AlbumArt>;
if (observableCollectionOfDisposables != null)
{
//Detach the result from the collection so that it isn't disposed of when the source is re-used.
observableCollectionOfDisposables.Detach(mSearchResult);
//Responsibility for disposing of mSearchResult is now taken here, and will be passed on to mResults when it is added to that collection.
}
//No need to search other sources.
break;
}
}
//Was a valid result found in any source?
if (mSearchResult != null)
{
//Yes, so save it and add it to the results list.
Dispatcher.Invoke(DispatcherPriority.DataBind, new ThreadStart(delegate
{
mSearchResult.DefaultFilePathPattern = album.ArtFile;
//If the file already exists, overwrite it
if (System.IO.File.Exists(mSearchResult.FilePath))
{
try
{
System.IO.File.Delete(mSearchResult.FilePath);
}
catch (Exception ex)
{
System.Diagnostics.Trace.TraceError("Could not delete file \"{0}\": {1}", mSearchResult.FilePath, ex.Message);
}
}
mSearchResult.Save();
mResults.Add(mSearchResult);
album.SetArtFile(mSearchResult.FilePath);
Progress++;
}));
mResultsLookup.Add(album, mSearchResult);
mReverseLookup.Add(mSearchResult, album);
mSearchResult = null;
}
else
{
mAlbumsMissingResults.Add(album);
album.ArtFileStatus = ArtFileStatus.Missing;
}
}
catch (ThreadAbortException)
{
album.ArtFileStatus = ArtFileStatus.Queued;
return;
}
//Get the next album
Dispatcher.Invoke(DispatcherPriority.Send, new ThreadStart(delegate
{
album = mQueueList.GetNextAlbum();
}));
}
Dispatcher.BeginInvoke(DispatcherPriority.DataBind, new ThreadStart(delegate
{
IsSearching = false;
System.Diagnostics.Debug.Assert(mQueueList.Items.Count - mResults.Count == mAlbumsMissingResults.Count, "Unexpected albums missing results count");
ProgressText = String.Format("Done. {0} albums found, {1} not found.", mResults.Count, mAlbumsMissingResults.Count);
mSearchThread = null;
ReEnableStartButton();
}));
}
