64 lines
1.7 KiB
Go
64 lines
1.7 KiB
Go
package qmc
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"fmt"
|
|
"io"
|
|
)
|
|
|
|
type qqMusicTagMusicEx struct {
|
|
songid uint32 // Song ID
|
|
unknown_1 uint32 // unused & unknown
|
|
unknown_2 uint32 // unused & unknown
|
|
mid string // Media ID
|
|
mediafile string // real file name
|
|
unknown_3 uint32 // unused; uninitialized memory?
|
|
sizeof_struct uint32 // 19.57: fixed value: 0xC0
|
|
version uint32 // 19.57: fixed value: 0x01
|
|
tag_magic []byte // fixed value "musicex\0" (8 bytes)
|
|
}
|
|
|
|
func (tag *qqMusicTagMusicEx) Read(raw io.ReadSeeker) (int64, error) {
|
|
_, err := raw.Seek(-16, io.SeekEnd)
|
|
if err != nil {
|
|
return 0, fmt.Errorf("musicex seek error: %w", err)
|
|
}
|
|
|
|
footerBuf := make([]byte, 4)
|
|
footerBuf, err = io.ReadAll(io.LimitReader(raw, 4))
|
|
if err != nil {
|
|
return 0, fmt.Errorf("get musicex error: %w", err)
|
|
}
|
|
footerLen := int64(binary.LittleEndian.Uint32(footerBuf))
|
|
|
|
audioLen, err := raw.Seek(-footerLen, io.SeekEnd)
|
|
buf, err := io.ReadAll(io.LimitReader(raw, audioLen))
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
tag.songid = binary.LittleEndian.Uint32(buf[0:4])
|
|
tag.unknown_1 = binary.LittleEndian.Uint32(buf[4:8])
|
|
tag.unknown_2 = binary.LittleEndian.Uint32(buf[8:12])
|
|
|
|
for i := 0; i < 30; i++ {
|
|
u := binary.LittleEndian.Uint16(buf[12+i*2 : 12+(i+1)*2])
|
|
if u != 0 {
|
|
tag.mid += string(u)
|
|
}
|
|
}
|
|
for i := 0; i < 50; i++ {
|
|
u := binary.LittleEndian.Uint16(buf[72+i*2 : 72+(i+1)*2])
|
|
if u != 0 {
|
|
tag.mediafile += string(u)
|
|
}
|
|
}
|
|
|
|
tag.unknown_3 = binary.LittleEndian.Uint32(buf[173:177])
|
|
tag.sizeof_struct = binary.LittleEndian.Uint32(buf[177:181])
|
|
tag.version = binary.LittleEndian.Uint32(buf[181:185])
|
|
tag.tag_magic = buf[185:193]
|
|
|
|
return audioLen, nil
|
|
}
|