129 lines
2.9 KiB
Go
129 lines
2.9 KiB
Go
package ltc
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import (
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"regexp"
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"strconv"
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"strings"
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"github.com/Hami-Lemon/ltc/glist"
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)
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type LRCNode struct {
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//歌词出现的时间,单位毫秒
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time int
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//歌词内容
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content string
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}
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type LRC struct {
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//歌曲名
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Title string
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//歌手名
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Artist string
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//专辑名
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Album string
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//歌词作者
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Author string
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//歌词列表
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LrcList glist.Queue[*LRCNode]
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}
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func ParseLRC(src string) *LRC {
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if src == "" {
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return nil
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}
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//标准的LRC文件为一行一句歌词
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lyrics := strings.Split(src, "\n")
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//标识标签的正则 [ar:A-SOUL]形式
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infoRegx := regexp.MustCompile(`^\[([a-z]+):([\s\S]*)]`)
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lrc := &LRC{LrcList: glist.NewLinkedList[*LRCNode]()}
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//解析标识信息
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for {
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if len(lyrics) == 0 {
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break
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}
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l := lyrics[0]
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//根据正则表达式进行匹配
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info := infoRegx.FindStringSubmatch(l)
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//标识信息位于歌词信息前面，当出现未匹配成功时，即可退出循环
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if info != nil {
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//info 中为匹配成功的字符串和 子组合（正则表达式中括号包裹的部分）
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//例如，对于标识信息：[ar:A-SOUL]，info中的数据为[[ar:A-SOUL], ar, A-SOUL]
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key := info[1]
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switch key {
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case "ar":
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//歌手名
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if len(info) == 3 {
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lrc.Artist = info[2]
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}
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case "ti":
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//歌曲名
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if len(info) == 3 {
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lrc.Title = info[2]
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}
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case "al":
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//专辑名
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if len(info) == 3 {
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lrc.Album = info[2]
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}
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case "by":
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//歌词作者
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if len(info) == 3 {
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lrc.Author = info[2]
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}
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}
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lyrics = lyrics[1:]
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} else {
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break
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}
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}
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//歌词信息的正则，"[00:10.222]超级的敏感"或“[00:10:222]超级的敏感”或“[00:10]超级的敏感”或“[00:10.22]超级的敏感”或“[00:10:22]超级的敏感”
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lyricRegx := regexp.MustCompile(`\[(\d\d):(\d\d)([.:]\d{2,3})?]([\s\S]+)`)
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for _, l := range lyrics {
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content := lyricRegx.FindStringSubmatch(l)
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if content != nil {
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node := SplitLyric(content[1:])
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if node != nil {
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lrc.LrcList.PushBack(node)
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}
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}
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}
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return lrc
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}
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// SplitLyric 对分割出来的歌词信息进行解析
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func SplitLyric(src []string) *LRCNode {
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minute, err := strconv.Atoi(src[0])
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second, err := strconv.Atoi(src[1])
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if err != nil {
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panic("错误的时间格式:" + strings.Join(src, " "))
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return nil
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}
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millisecond, content := 0, ""
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_len := len(src)
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if _len == 3 {
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//歌词信息没有毫秒值
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content = src[2]
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} else if _len == 4 {
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content = src[3]
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//毫秒字符串的第一个字符是 "." 或 ":",需要去掉
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ms := src[2][1:]
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millisecond, err = strconv.Atoi(ms)
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//QQ音乐歌词文件中，毫秒值只有两位，需要特殊处理一下
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if len(ms) == 2 {
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millisecond *= 10
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}
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if err != nil {
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panic("错误的时间格式:" + strings.Join(src, " "))
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return nil
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}
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}
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lrcNode := &LRCNode{
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time: time2Millisecond(minute, second, millisecond),
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content: strings.TrimSpace(content), //去掉前后的空格
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}
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return lrcNode
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}
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