本文實例講述了C#實現(xiàn)獲取mp3 Tag信息的方法。分享給大家供大家參考,具體如下:

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace Foxer_Player_1._1
{
public struct Mp3Info
{
public string identify; //TAG,三個字節(jié)
public string Title; //歌曲名,30個字節(jié)
public string Artist; //歌手名,30個字節(jié)
public string Album; //所屬唱片,30個字節(jié)
public string Year; //年,4個字符
public string Comment; //注釋,28個字節(jié)
public char reserved1; //保留位,一個字節(jié)
public char reserved2; //保留位,一個字節(jié)
public char reserved3; //保留位,一個字節(jié)
}
/// <summary>
/// Mp3文件信息類
/// </summary>
public class Mp3FileInfo
{
Mp3Info info;
/// <summary>
/// 構(gòu)造函數(shù),輸入文件名即得到信息
/// </summary>
/// <param name="mp3FilePos"></param>
public Mp3FileInfo(String mp3FilePos)
{
info = getMp3Info(getLast128(mp3FilePos));
}
/// <summary>
/// 獲取整理后的Mp3文件名,這里以標題和藝術(shù)家名定文件名
/// </summary>
/// <returns></returns>
public String GetOriginalName()
{
return formatString(info.Title.Trim()) + "-" + formatString(info.Artist.Trim());
}
/// <summary>
/// 去除\0字符
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
private static String formatString(String str)
{
return str.Replace("\0", "");
}
/// <summary>
/// 獲取MP3文件最后128個字節(jié)
/// </summary>
/// <param name="FileName">文件名</param>
/// <returns>返回字節(jié)數(shù)組</returns>
public static byte[] getLast128(string FileName)
{
FileStream fs = new FileStream(FileName, FileMode.Open, Fileaccess.Read);
Stream stream = fs;
stream.Seek(-128, SeekOrigin.End);
const int seekPos = 128;
int rl = 0;
byte[] Info = new byte[seekPos];
rl = stream.Read(Info, 0, seekPos);
fs.Close();
stream.Close();
return Info;
}
/// <summary>
/// 獲取MP3歌曲的相關(guān)信息
/// </summary>
/// <param name = "Info">從MP3文件中截取的二進制信息</param>
/// <returns>返回一個Mp3Info結(jié)構(gòu)</returns>
public static Mp3Info getMp3Info(byte[] Info)
{
Mp3Info mp3Info = new Mp3Info();
string str = null;
int i;
int position = 0;//循環(huán)的起始值
int currentIndex = 0;//Info的當前索引值
//獲取TAG標識
for (i = currentIndex; i < currentIndex + 3; i++)
{
str = str + (char)Info[i];
position++;
}
currentIndex = position;
mp3Info.identify = str;
//獲取歌名
str = null;
byte[] bytTitle = new byte[30];//將歌名部分讀到一個單獨的數(shù)組中
int j = 0;
for (i = currentIndex; i < currentIndex + 30; i++)
{
bytTitle[j] = Info[i];
position++;
j++;
}
currentIndex = position;
mp3Info.Title = Foxer_Player_1._1.Mp3FileInfo.byteToString(bytTitle);
//獲取歌手名
str = null;
j = 0;
byte[] bytArtist = new byte[30];//將歌手名部分讀到一個單獨的數(shù)組中
for (i = currentIndex; i < currentIndex + 30; i++)
{
bytArtist[j] = Info[i];
position++;
j++;
}
currentIndex = position;
mp3Info.Artist = Foxer_Player_1._1.Mp3FileInfo.byteToString(bytArtist);
//獲取唱片名
str = null;
j = 0;
byte[] bytAlbum = new byte[30];//將唱片名部分讀到一個單獨的數(shù)組中
for (i = currentIndex; i < currentIndex + 30; i++)
{
bytAlbum[j] = Info[i];
position++;
j++;
}
currentIndex = position;
mp3Info.Album = Foxer_Player_1._1.Mp3FileInfo.byteToString(bytAlbum);
//獲取年
str = null;
j = 0;
byte[] bytYear = new byte[4];//將年部分讀到一個單獨的數(shù)組中
for (i = currentIndex; i < currentIndex + 4; i++)
{
bytYear[j] = Info[i];
position++;
j++;
}
currentIndex = position;
mp3Info.Year = Foxer_Player_1._1.Mp3FileInfo.byteToString(bytYear);
//獲取注釋
str = null;
j = 0;
byte[] bytComment = new byte[28];//將注釋部分讀到一個單獨的數(shù)組中
for (i = currentIndex; i < currentIndex + 25; i++)
{
bytComment[j] = Info[i];
position++;
j++;
}
currentIndex = position;
mp3Info.Comment = Foxer_Player_1._1.Mp3FileInfo.byteToString(bytComment);
//以下獲取保留位
mp3Info.reserved1 = (char)Info[++position];
mp3Info.reserved2 = (char)Info[++position];
mp3Info.reserved3 = (char)Info[++position];
return mp3Info;
}
/// <summary>
/// 將字節(jié)數(shù)組轉(zhuǎn)換成字符串
/// </summary>
/// <param name = "b">字節(jié)數(shù)組</param>
/// <returns>返回轉(zhuǎn)換后的字符串</returns>
public static string byteToString(byte[] b)
{
Encoding enc = Encoding.GetEncoding("GB2312");
string str = enc.GetString(b);
str = str.Substring(0, str.IndexOf("#CONTENT#") >= 0 ? str.IndexOf("#CONTENT#") : str.Length);//去掉無用字符
return str;
}
}
}
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標題名稱:C#實現(xiàn)獲取mp3Tag信息的方法-創(chuàng)新互聯(lián)
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