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fix: Handle musicex tag correctly

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This commit is contained in:
鲁树人
2025-09-15 21:35:12 +09:00
parent e4bfefd0a6
commit aea3bd5714
2 changed files with 20 additions and 10 deletions
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9
algo/qmc/qmc_footer_musicex.go
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@@ -42,24 +42,25 @@ func NewMusicExTag(f io.ReadSeeker) (*MusicExTagV1, error) {
tag := &MusicExTagV1{
TagSize: binary.LittleEndian.Uint32(buffer[0x00:0x04]),
TagVersion: binary.LittleEndian.Uint32(buffer[0x04:0x08]),
TagMagic: buffer[0x04:0x0C],
TagMagic: buffer[0x08:],
}
if !bytes.Equal(tag.TagMagic, []byte("musicex\x00")) {
return nil, errors.New("MusicEx magic mismatch")
}
if tag.TagVersion != 1 {
return nil, errors.New(fmt.Sprintf("unsupported musicex tag version. expecting 1, got %d", tag.TagVersion))
return nil, fmt.Errorf("unsupported musicex tag version. expecting 1, got %d", tag.TagVersion)
}
if tag.TagSize < 0xC0 {
return nil, errors.New(fmt.Sprintf("unsupported musicex tag size. expecting at least 0xC0, got 0x%02x", tag.TagSize))
return nil, fmt.Errorf("unsupported musicex tag size. expecting at least 0xC0, got 0x%02x", tag.TagSize)
}
buffer = make([]byte, tag.TagSize)
f.Seek(-int64(tag.TagSize), io.SeekEnd)
bytesRead, err = f.Read(buffer)
if err != nil {
return nil, err
return nil, fmt.Errorf("MusicExV1: Read error %w", err)
}
if uint32(bytesRead) != tag.TagSize {
return nil, fmt.Errorf("MusicExV1: read %d bytes (expected %d)", bytesRead, tag.TagSize)