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main.go
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main.go
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package main
import (
"flag"
"github.com/jayacarlson/dbg"
"github.com/jayacarlson/mp3"
)
func DumpID3v2Info(m *mp3.MP3File) error {
err := m.ValidateID3v2File()
if nil != err {
return err
}
path := m.Path()
verMajor, verMinor := m.ID3v2Version()
flags := m.ID3v2Flags()
if !(2 <= verMajor && 4 >= verMajor) {
return mp3.Err_UnknownID3v2Version
}
dbg.Info("File `%s` uses ID3 v2.%d.%d (x%02x) %d x%x", path, verMajor, verMinor, flags, m.ID3Area(), m.ID3Area())
if 2 == verMajor {
return mp3.Err_ObsoleteID3v2Version
}
for {
frm, err := m.ReadID3v2Frame()
if nil != err {
if mp3.Err_EOF == err {
break
}
return err
}
dbg.Echo(" %s: (%02x,%02x) %d", frm.Tag, frm.Flags[0], frm.Flags[1], frm.Size)
s, err := frm.ToString()
if nil != err {
return err
}
dbg.Message(" `%s`", s)
}
dbg.Info(" %d x%x bytes remaining", m.ID3Area(), m.ID3Area())
return nil
}
func main() {
flag.Parse()
files := flag.Args()
if len(files) == 0 {
dbg.Fatal("Must supply filename(s) to dump")
}
for _, f := range files {
m, err := mp3.OpenMP3File(f)
if nil != err {
dbg.Error("ERR: %v", err)
continue
}
err = DumpID3v2Info(m)
if nil != err {
dbg.Error("ERR: %v", err)
}
m.Close()
}
}