ASP实现对MP3曲目信息的操作
作者:佚名 日期:2009-10-01
先简单说一下MP3的ID3 标记,因为主要是操作这个玩意 MP3最开始的时候没有我们今天看到的那样,有歌手、年代,专集等等信息只有一些简单的参数如yes/no来表示是不是privated或者copyrighted等信息,这样对MP3的相关工作带来了很多不便,1996年的时候有个老外提出来在每个MP3后面追加一段数据,用以存放上述的那些信息,后来就发展成为id3 v1 据我所知的现在已经到1.1了,具体的还是自己去查一下吧还是老习惯,用metadata来引入DLL,我以前有文章贴过的,不知道的请自己去查
看代码
ASP/Visual Basic代码
- 〈!--METADATA TYPE="typelib"
- UUID="00000205-0000-0010-8000-00AA006D2EA4"
- NAME="ADODB Type Library"
- --〉
- 〈%
- Function ConvertBin(Binary)
- 'This function converts a binary byte into an ASCII byte.
- for i = 1 to LenB(Binary)
- strChar = chr(AscB(MidB(Binary,i,1)))
- ConvertBin = ConvertBin & strChar
- Next
- End Function
- dim objStream
- dim strTag, strSongName, strArtist, strAlbum, strYear, _
- strComment, strGenre, strFile
- 'Specify the folder to iterate through, displaying all the MP3s
- Const folder = "C:\mp3s\"
- 'Grab the folder information
- Dim objFSO, objFolder, objFile
- Set objFSO = Server.CreateObject("Scripting.FileSYstemObject")
- Set objFolder = objFSO.GetFolder(folder)
- 'Create the Stream object
- set objStream = Server.CreateObject("ADODB.Stream")
- objStream.Type = adTypeBinary
- 'Loop through the files in the folder
- For Each objFile in objFolder.Files
- 'Open the stream
- objStream.Open
- objStream.LoadFromFile objFile.Path
- 'Read the last 128 bytes
- objStream.Position = objStream.size - 128
- 'Read the ID3 v1 tag info
- strTag = ConvertBin(objStream.Read(3))
- if ucase(strTag) = "TAG" then
- strSongName = ConvertBin(objStream.Read(30))
- strArtist = ConvertBin(objStream.Read(30))
- strAlbum = ConvertBin(objStream.Read(30))
- strYear = ConvertBin(objStream.Read(4))
- strComment = ConvertBin(objStream.Read(30))
- end if
- 'Display the results
- response.write "〈table〉〈tr〉〈td colspan=2〉〈h3〉" & _
- "ID3 Tag info for:〈/td〉〈/tr〉〈tr〉" & _
- "〈td colspan=2〉" & objFile.Name & "〈/td〉〈/tr〉"
- response.write "〈tr〉〈td〉〈b〉Artist: 〈/b〉〈/td〉" & _
- "〈td〉" & strArtist & "〈/td〉〈/tr〉"
- response.write "〈tr〉〈td〉〈b〉Track: 〈/b〉〈/td〉" & _
- "〈td〉" & strSongName & "〈/td〉〈/tr〉"
- response.write "〈tr〉〈td〉〈b〉Album: 〈/b〉〈/td〉" & _
- 〈td〉" & strAlbum & "〈/td〉〈/tr〉"
- response.write "〈tr〉〈td〉〈b〉Year: 〈/b〉〈/td〉" & _
- "〈td〉" & strYear & "〈/td〉〈/tr〉"
- response.write "〈tr〉〈td〉〈b〉Comment: 〈/b〉" & _
- "〈/td〉〈td〉" & strComment & "〈/td〉〈/tr〉"
- response.write "〈/table〉"
- objStream.Close
- Response.Write "〈p〉〈hr〉〈p〉"
- Next
- Set objStream = Nothing 'Clean up...
- %〉
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