/// <summary>
/// 分析MP3Tag并加入索引
/// </summary>
private void AnalyzeMP3Tag()
{
DateTime dt1 = DateTime.Now;
MP3TagData mp3Tag = new MP3TagData();
bool isQueueEmpty = true;
while (true)
{
//如果用户执行了停止索引，结束。
if (this.isStopIndexMP3 == true)
{
break;
}
lock (this.mp3TagQueue)
{
if (this.mp3TagQueue.Count > 0)
{
isQueueEmpty = false;
mp3Tag = this.mp3TagQueue.Dequeue();
}
else
{
isQueueEmpty = true;
}
}
if (isQueueEmpty == false)
{
//设置当前正在索引的文件夹
lock (this.currentDirectory)
{
this.currentDirectory = mp3Tag.directory;
}
//收集音乐家
if (this.mp3Artist.Contains(mp3Tag.artist) == false)
{
this.mp3Artist.Add(mp3Tag.artist);
Console.WriteLine(mp3Tag.artist);
}
//收集文件夹
if (this.mp3Directorys.Contains(mp3Tag.directory) == false)
{
this.mp3Directorys.Add(mp3Tag.directory);
}
this.f_Name.SetValue(mp3Tag.name);
this.f_Length.SetValue(mp3Tag.length);
this.f_Directory.SetValue(mp3Tag.directory);
this.f_LastWriteTime.SetValue(mp3Tag.lastWriteTime);
this.m_Album.SetValue(mp3Tag.album);
this.m_Artist.SetValue(mp3Tag.artist);
this.m_Genre.SetValue(mp3Tag.genre);
this.m_PubYear.SetValue(mp3Tag.pubYear);
this.m_SongName.SetValue(mp3Tag.songName);
this.m_ArtistStore.SetValue(mp3Tag.artist);
Document doc = new Document();
doc.Add(this.f_Name);
doc.Add(this.f_Length);
doc.Add(this.f_Directory);
doc.Add(this.f_LastWriteTime);
doc.Add(this.m_Album);
doc.Add(this.m_Artist);
doc.Add(this.m_Genre);
doc.Add(this.m_PubYear);
doc.Add(this.m_SongName);
doc.Add(this.m_ArtistStore);
this.mp3IndexWriter.AddDocument(doc);
}
else if (this.isGetMP3TagEnd == false)
{
//Console.Out.WriteLine("mp3TagQueue 空");
Thread.Sleep(0);//让出时间片给其他线程
continue;
}
else
{
break;
}
}
//对索引优化，将多个段文件合并成一个文件，减少搜索时打开的文件数，提高搜索速度。
this.mp3IndexWriter.Optimize();
this.mp3IndexWriter.Close();
this.dtMP3Stop = DateTime.Now;//MP3索引结束
this.isIndexMP3Complete = true;
double d = (DateTime.Now - dt1).TotalSeconds;
//Console.Out.WriteLine("分析MP3" + d);
//Console.Out.WriteLine(this.mp3FileCounter + this.mp3FolderCounter);
//执行索引后可能修改mp3Artist，更新mp3Artist。
Static.MP3Artist = this.mp3Artist;
//执行索引后可能修改mp3Artist，置MP3ArtistInfo为null，在搜索时重新更新。
Static.MArtistInfo = null;
this.SaveIndexInfo();//保存索引信息
this.CallBack();
}
/// <summary>
/// 获取MP3的Tag信息
/// </summary>
private void GetMP3Tag()
{
DateTime dt1 = DateTime.Now;
this.isGetMP3TagEnd = false;
string fullName = "";//文件全名
MP3FileData mp3File = new MP3FileData();
MP3TagData mp3Tag = new MP3TagData();
bool isQueueEmpty = false;
while (true)
{
//如果用户执行了停止索引，结束。
if (this.isStopIndexMP3 == true)
{
break;
}
lock (this.mp3FileQueue)
{
if (this.mp3FileQueue.Count > 0)
{
isQueueEmpty = false;
mp3File = this.mp3FileQueue.Dequeue();
}
else
{
isQueueEmpty = true;
}
}
if (isQueueEmpty == false)
{
//文件信息
mp3Tag.name = mp3File.name;
mp3Tag.length = mp3File.length;
mp3Tag.directory = mp3File.directory;
mp3Tag.lastWriteTime = mp3File.lastWriteTime;
fullName = mp3Tag.directory + mp3Tag.name;
//读取MP3文件的最后128个字节的内容
try
{
using (FileStream fs = new FileStream(fullName, FileMode.Open, FileAccess.Read))
{
fs.Seek(-128, SeekOrigin.End);
fs.Read(tagBody, 0, 128);
fs.Close();
}
}
catch
{
continue;
}
//取TAG段的前三个字节
tagFlag = Encoding.Default.GetString(tagBody, 0, 3);
//如果没有TAG信息，则置为null
if (!"TAG".Equals(tagFlag, StringComparison.InvariantCultureIgnoreCase))
{
mp3Tag.album = "";
mp3Tag.artist = "";
mp3Tag.genre = "";
mp3Tag.pubYear = "";
mp3Tag.songName = "";
}
else
{
//按照MP3 ID3 V1 的tag定义，依次读取相关的信息
mp3Tag.songName = Encoding.Default.GetString(tagBody, 3, 30);
mp3Tag.songName = (mp3Tag.songName.Trim()).Trim('\0');
mp3Tag.artist = Encoding.Default.GetString(tagBody, 33, 30);
mp3Tag.artist = (mp3Tag.artist.Trim()).Trim('\0');
mp3Tag.album = Encoding.Default.GetString(tagBody, 62, 30);
mp3Tag.album = (mp3Tag.album.Trim()).Trim('\0');
mp3Tag.pubYear = Encoding.Default.GetString(tagBody, 93, 4);
mp3Tag.pubYear = (mp3Tag.pubYear.Trim()).Trim('\0');
Int16 g = (Int16)tagBody[127];
mp3Tag.genre = g >= this.GENRE.Length ? "" : this.GENRE[g];
}
lock (this.mp3TagQueue)
{
this.mp3TagQueue.Enqueue(mp3Tag);
}
}
else if (this.isScanMP3End == false)
{
//Console.WriteLine("mp3FileQueue 空");
Thread.Sleep(0);//让出时间片给其他线程
continue;
}
else
{
break;
}
}
this.isGetMP3TagEnd = true;//获取MP3Tag结束
double d = (DateTime.Now - dt1).TotalSeconds;
//Console.Out.WriteLine("GetMP3TagEnd" + d);
}
