我也帖一个获取mp3信息的例子Public Type Mp3tag Artist As String ’Artist 存储歌手信息 Album As String ’Album 存储唱片专辑信息 Title As String ’Title 存储标题信息 Year As String ’Year 存储年代信息 Comments As String ’Comments 存储备注信息 Genre As Integer ’Genre 存储音乐风格序列 End Type 然后,定义一个获取MP3信息的函数,它将返回这些信息,代码如下: Public Function GetMp3Tag(FName As String) As Mp3tag Dim Artist As String Dim Album As String Dim Title As String Dim Year As String Dim Comments As String Dim Genre As Integer
If FName = "" Then Exit Function If Dir(FName) = "" Then Exit Function
Dim FileNum As Integer FileNum = FreeFile ’得到一个自由的文件号 Dim strInput As String Open FName For Binary Access Read As FileNum ’以二进制形式打开文件
If LOF(FileNum) < 128 Then Close FileNum Exit Function End If
Seek FileNum, LOF(FileNum) - 127 ’把文件指针移动到MP3信息处 strInput = Space(3) Get FileNum, , strInput If strInput <> "TAG" Then ’如果没有发现信息标识,就关闭文件 Close FileNum GoTo Done: End If
strInput = Space(30) Get FileNum, , strInput Title = Trim(strInput)
strInput = Space(30) Get FileNum, , strInput Artist = Trim(strInput)
strInput = Space(30) Get FileNum, , strInput Album = Trim(strInput)
strInput = Space(4) Get FileNum, , strInput Year = Trim(strInput)
strInput = Space(30) Get FileNum, , strInput Comments = Trim(strInput)
strInput = Space(1) Get FileNum, , strInput Genre = Asc(strInput) Done: GetMp3Tag.Title = Title GetMp3Tag.Artist = Artist GetMp3Tag.Album = Album GetMp3Tag.Year = Year GetMp3Tag.Year = Comments If Genre < 0 Or Genre > 254 Then Genre = 12 GetMp3Tag.Genre = CInt(Genre)
Close FileNum End Function
注意:MP3文件对音乐的风格进行了限制,共254种。Genre返回的只是MP3风格的序列号,具体还需要定位,在这里我把所有类型以常数形式列出,每个类型之间用"|"号隔开。 Private Const sGenreMatrix = "Blues|Classic Rock|Country|Dance|Disco|Funk|Grunge|" + _ "Hip-Hop|Jazz|Metal|New Age|Oldies|Other|Pop|R&B|Rap|Reggae|Rock|Techno|" + _ "Industrial|Alternative|Ska|Death Metal|Pranks|Soundtrack|Euro-Techno|" + _ "Ambient|Trip Hop|Vocal|Jazz+Funk|Fusion|Trance|Classical|Instrumental|Acid|" + _ "House|Game|Sound Clip|Gospel|Noise|Alt. Rock|Bass|Soul|Punk|Space|Meditative|" + _ "Instrumental Pop|Instrumental Rock|Ethnic|Gothic|Darkwave|Techno-Industrial|Electronic|" + _ "Pop-Folk|Eurodance|Dream|Southern Rock|Comedy|Cult|Gangsta Rap|Top 40|Christian Rap|" + _ "Pop/Punk|Jungle|Native American|Cabaret|New Wave|Phychedelic|Rave|Showtunes|Trailer|" + _ "Lo-Fi|Tribal|Acid Punk|Acid Jazz|Polka|Retro|Musical|Rock & Roll|Hard Rock|Folk|" + _ "Folk/Rock|National Folk|Swing|Fast-Fusion|Bebob|Latin|Revival|Celtic|Blue Grass|" + _ "Avantegarde|Gothic Rock|Progressive Rock|Psychedelic Rock|Symphonic Rock|Slow Rock|" + _ "Big Band|Chorus|Easy Listening|Acoustic|Humour|Speech|Chanson|Opera|Chamber Music|" + _ "Sonata|Symphony|Booty Bass|Primus|Porn Groove|Satire|Slow Jam|Club|Tango|Samba|Folklore|" + _ "Ballad|power Ballad|Rhythmic Soul|Freestyle|Duet|Punk Rock|Drum Solo|A Capella|Euro-House|" + _ "Dance Hall|Goa|Drum & Bass|Club-House|Hardcore|Terror|indie|Brit Pop|Negerpunk|Polsk Punk|" + _ "Beat|Christian Gangsta Rap|Heavy Metal|Black Metal|Crossover|Comteporary Christian|" + _ "Christian Rock|Merengue|Salsa|Trash Metal|Anime|JPop|Synth Pop" 把以上代码写到一个模块中(.Bas),然后在窗体上加入5个TextBox和1个ComboBox控件,其中5个TextBox控件分别用来显示一首Mp3文件的以下信息:歌手、年代、唱片、评论、标题,ComboBox控件用来显示歌曲的风格。再放一个Command控件,其标题为“显示信息”,在它的Click事件中加入以下代码: Private sub Command1_click() Dim mp3Tag as Mp3tag mp3tag = GetMp3Tag ("c:\Song.mp3") Text1.Text = mp3tag.Artist Text2.Text = mp3tag.Album Text3.Text = mp3tag.Title Text4.Text = mp3tag.Year Text5.Text = mp3tag.Comments Combo1.ListIndex = mp3tag.Genre End Sub 在窗体的加载过程中加入如下代码: Private Sub Form_Load() Dim i As Integer,GenreArray() As String GenreArray = Split(sGenreMatrix, "|") For i = LBound(GenreArray) To UBound(GenreArray) Combo1.AddItem GenreArray(i) Next i End Sub
以上代码在VB6 \Win2000中测试通过。
我看了 cso(sjxsoft) 给的例子,它并没正确读出ID3v的信息,不过看懂了一点 就是ID3v2的第七个字节(ID3456"7")里保存了整个ID3v2的长度,可以保存在long类型里面, 通过转换得到字节长度。 其它信息我想也是一样有个地方保存了自己的长度的地方。 大家看看有没说错?captainivy(Ivy)的对中英文混合时会出问题,最好定义 strInput() as byte 而且 .... Genre as byte ....Get FileNum, , Genre(Genre就是对应流派的序号,不用(asc)转换了)
这个例子可以读取修改MP3_ID3v1和ID3v2的Tag
我也帖一个获取mp3信息的例子Public Type Mp3tag
Artist As String ’Artist 存储歌手信息
Album As String ’Album 存储唱片专辑信息
Title As String ’Title 存储标题信息
Year As String ’Year 存储年代信息
Comments As String ’Comments 存储备注信息
Genre As Integer ’Genre 存储音乐风格序列
End Type 然后,定义一个获取MP3信息的函数,它将返回这些信息,代码如下: Public Function GetMp3Tag(FName As String) As Mp3tag
Dim Artist As String
Dim Album As String
Dim Title As String
Dim Year As String
Dim Comments As String
Dim Genre As Integer
If FName = "" Then Exit Function If Dir(FName) = "" Then Exit Function
Dim FileNum As Integer FileNum = FreeFile ’得到一个自由的文件号 Dim strInput As String Open FName For Binary Access Read As FileNum ’以二进制形式打开文件
If LOF(FileNum) < 128 Then
Close FileNum
Exit Function
End If
Seek FileNum, LOF(FileNum) - 127 ’把文件指针移动到MP3信息处
strInput = Space(3)
Get FileNum, , strInput
If strInput <> "TAG" Then ’如果没有发现信息标识,就关闭文件
Close FileNum
GoTo Done:
End If
strInput = Space(30)
Get FileNum, , strInput
Title = Trim(strInput)
strInput = Space(30)
Get FileNum, , strInput
Artist = Trim(strInput)
strInput = Space(30)
Get FileNum, , strInput
Album = Trim(strInput)
strInput = Space(4)
Get FileNum, , strInput
Year = Trim(strInput)
strInput = Space(30)
Get FileNum, , strInput
Comments = Trim(strInput)
strInput = Space(1)
Get FileNum, , strInput
Genre = Asc(strInput) Done:
GetMp3Tag.Title = Title
GetMp3Tag.Artist = Artist
GetMp3Tag.Album = Album
GetMp3Tag.Year = Year
GetMp3Tag.Year = Comments
If Genre < 0 Or Genre > 254 Then Genre = 12
GetMp3Tag.Genre = CInt(Genre)
Close FileNum End Function
注意:MP3文件对音乐的风格进行了限制,共254种。Genre返回的只是MP3风格的序列号,具体还需要定位,在这里我把所有类型以常数形式列出,每个类型之间用"|"号隔开。 Private Const sGenreMatrix = "Blues|Classic Rock|Country|Dance|Disco|Funk|Grunge|" + _
"Hip-Hop|Jazz|Metal|New Age|Oldies|Other|Pop|R&B|Rap|Reggae|Rock|Techno|" + _
"Industrial|Alternative|Ska|Death Metal|Pranks|Soundtrack|Euro-Techno|" + _
"Ambient|Trip Hop|Vocal|Jazz+Funk|Fusion|Trance|Classical|Instrumental|Acid|" + _
"House|Game|Sound Clip|Gospel|Noise|Alt. Rock|Bass|Soul|Punk|Space|Meditative|" + _
"Instrumental Pop|Instrumental Rock|Ethnic|Gothic|Darkwave|Techno-Industrial|Electronic|" + _
"Pop-Folk|Eurodance|Dream|Southern Rock|Comedy|Cult|Gangsta Rap|Top 40|Christian Rap|" + _
"Pop/Punk|Jungle|Native American|Cabaret|New Wave|Phychedelic|Rave|Showtunes|Trailer|" + _
"Lo-Fi|Tribal|Acid Punk|Acid Jazz|Polka|Retro|Musical|Rock & Roll|Hard Rock|Folk|" + _
"Folk/Rock|National Folk|Swing|Fast-Fusion|Bebob|Latin|Revival|Celtic|Blue Grass|" + _
"Avantegarde|Gothic Rock|Progressive Rock|Psychedelic Rock|Symphonic Rock|Slow Rock|" + _
"Big Band|Chorus|Easy Listening|Acoustic|Humour|Speech|Chanson|Opera|Chamber Music|" + _
"Sonata|Symphony|Booty Bass|Primus|Porn Groove|Satire|Slow Jam|Club|Tango|Samba|Folklore|" + _
"Ballad|power Ballad|Rhythmic Soul|Freestyle|Duet|Punk Rock|Drum Solo|A Capella|Euro-House|" + _
"Dance Hall|Goa|Drum & Bass|Club-House|Hardcore|Terror|indie|Brit Pop|Negerpunk|Polsk Punk|" + _
"Beat|Christian Gangsta Rap|Heavy Metal|Black Metal|Crossover|Comteporary Christian|" + _
"Christian Rock|Merengue|Salsa|Trash Metal|Anime|JPop|Synth Pop"
把以上代码写到一个模块中(.Bas),然后在窗体上加入5个TextBox和1个ComboBox控件,其中5个TextBox控件分别用来显示一首Mp3文件的以下信息:歌手、年代、唱片、评论、标题,ComboBox控件用来显示歌曲的风格。再放一个Command控件,其标题为“显示信息”,在它的Click事件中加入以下代码:
Private sub Command1_click()
Dim mp3Tag as Mp3tag
mp3tag = GetMp3Tag ("c:\Song.mp3")
Text1.Text = mp3tag.Artist
Text2.Text = mp3tag.Album
Text3.Text = mp3tag.Title
Text4.Text = mp3tag.Year
Text5.Text = mp3tag.Comments
Combo1.ListIndex = mp3tag.Genre
End Sub
在窗体的加载过程中加入如下代码:
Private Sub Form_Load()
Dim i As Integer,GenreArray() As String
GenreArray = Split(sGenreMatrix, "|")
For i = LBound(GenreArray) To UBound(GenreArray)
Combo1.AddItem GenreArray(i)
Next i
End Sub
以上代码在VB6 \Win2000中测试通过。
就是ID3v2的第七个字节(ID3456"7")里保存了整个ID3v2的长度,可以保存在long类型里面,
通过转换得到字节长度。
其它信息我想也是一样有个地方保存了自己的长度的地方。
大家看看有没说错?captainivy(Ivy)的对中英文混合时会出问题,最好定义
strInput() as byte
而且
....
Genre as byte
....Get FileNum, , Genre(Genre就是对应流派的序号,不用(asc)转换了)