这个结构在mp3文件尾部。
The ID3 Information is stored in the last 128 bytes of an MP3 file.
The ID3 has the following fields, and the offsets given here, are from 0-127
Field Length offsets
-------------------------------------
Tag 3 0-2
Songname 30 3-32
Artist 30 33-62
Album 30 63-92
Year 4 93-96
Comment 30 97-126
Genre 1 127
我为此作了一个管理软件mp3center马上就要出炉了。
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