好事成双的寓意

【精編ASP教程】75-用ASP實現對MP3曲目信息的操作

2019-08-16        99

先簡單說一下MP3的ID3 標記,因為主要是操作這個玩意

MP3最開始的時候沒有我們今天看到的那樣,有歌手、年代,專集等等信息

只有一些簡單的參數如yes/no來表示是不是privated或者copyrighted等信息,這樣對MP3的相關工作帶來了很多不便,1996年的時候有個老外提出來在每個MP3后面追加一段數據,用以存放上述的那些信息,后來就發展成為id3 v1 據我所知的現在已經到1.1了,具體的還是自己去查一下吧

還是老習慣,用metadata來引入DLL,我以前有文章貼過的,不知道的請自己去查

看代碼

〈!--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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