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fix #96: ncm file parsing when image cover 2 is not empty
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This commit is contained in:
鲁树人 2024-09-12 15:08:04 +01:00
parent 3630fc0c78
commit c87204c78a
1 changed files with 14 additions and 5 deletions
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19
algo/ncm/ncm.go
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@ -149,12 +149,18 @@ func (d *Decoder) readMetaData() error {
} }
func (d *Decoder) readCoverData() error { func (d *Decoder) readCoverData() error {
bCoverCRC := make([]byte, 4) bCoverFrameLen := make([]byte, 4)
if _, err := io.ReadFull(d.rd, bCoverCRC); err != nil { if _, err := io.ReadFull(d.rd, bCoverFrameLen); err != nil {
return fmt.Errorf("ncm read cover crc: %w", err) return fmt.Errorf("ncm read cover length: %w", err)
} }
bCoverLen := make([]byte, 4) // coverFrameStartOffset, err := d.rd.Seek(0, io.SeekCurrent)
if err != nil {
return fmt.Errorf("ncm fetch cover frame start offset: %w", err)
}
coverFrameLen := binary.LittleEndian.Uint32(bCoverFrameLen)
bCoverLen := make([]byte, 4)
if _, err := io.ReadFull(d.rd, bCoverLen); err != nil { if _, err := io.ReadFull(d.rd, bCoverLen); err != nil {
return fmt.Errorf("ncm read cover length: %w", err) return fmt.Errorf("ncm read cover length: %w", err)
} }
@ -166,7 +172,10 @@ func (d *Decoder) readCoverData() error {
} }
d.cover = coverBuf d.cover = coverBuf
return nil offsetAudioData := coverFrameStartOffset + int64(coverFrameLen) + 4
_, err = d.rd.Seek(offsetAudioData, io.SeekStart)
return err
} }
func (d *Decoder) parseMeta() error { func (d *Decoder) parseMeta() error {