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| //
// LyricTools.swift
// ParseLyrics
//
// Created by JeromeXiong on 2018/4/9.
// Copyright © 2018年 JeromeXiong. All rights reserved.
//
import Foundation
class LyricTools: NSObject {
}
// MARK: - decode string
extension LyricTools {
static func decodeKRC(filePath: String?) -> String? {
let EncKey: NSString = "@Gaw^2tGQ61-ÎÒni"
guard let path = filePath, let totalBytes = NSData(contentsOfFile: path) else {
return nil
}
if !path.lowercased().hasSuffix("krc") {
return nil
}
let EncodedBytes = NSMutableData(data: totalBytes.subdata(with: NSRange(location: 4, length: totalBytes.length - 4)))
let ZipBytes = NSMutableData(capacity: EncodedBytes.length)!
let encodedBytes = EncodedBytes.mutableBytes.bindMemory(to: UInt8.self, capacity: 1)//.assumingMemoryBound(to: UInt8.self)//转换为UInt8类型
for i in 0..<EncodedBytes.length {
let l = i % 16
let c = EncKey.character(at: l)
var b = UInt8(UInt16(encodedBytes.advanced(by: i).pointee) ^ c)
ZipBytes.append(&b, length: 1)
}
let unzipBytes = NSData.gtm_data(byInflatingData: ZipBytes as Data?)
let s = String(data: unzipBytes!, encoding: String.Encoding.utf8)
return s
}
static func decodeHRCS(filePath: String?) -> String? {
guard let path = filePath, let totalBytes = NSData(contentsOfFile: path), let unzipBytes = NSData.gtm_data(byInflatingData: totalBytes as Data?) else {
return nil
}
let s = String(data: unzipBytes, encoding: String.Encoding.utf8)
return s
}
}
// MARK: - krc tools
extension LyricTools {
/// 获取每一行的每一个字的元组数组
/// (start: String, length: String) (start: 开始时间, length: 持续时间)
/// - Parameter lrc: krc歌词
/// - Returns: 每一行的每一个字的元组数组
static func wordTimes(lrc: String) -> [[(start: Double, length: Double)]] {
let separatedBy = lrc.contains("\r\n") ? "\r\n" : "\n"
//获取字符串：从[offset:0]后面的字符开始
let lrcs = String(lrc[lrc.range(of: "[offset:0]")!.upperBound...])
//把krc歌词每个单词的time的最后一个,0 去掉
let newLrc = lrcs.replacingOccurrences(of: ",0>", with: ">")
let lrcArray = newLrc.components(separatedBy: separatedBy)
var timeArray = [[(start: Double, length: Double)]]()
for lineLrc in lrcArray {
if lineLrc.count == 0 {
continue
}
// [669,850]<0,200>那<200,200>时<400,250>的<650,200>光
var oneLineArray = [(start: Double, length: Double)]()
let sub = String(lineLrc[lineLrc.range(of: "]")!.upperBound...])
//把sub按>分成数组
let wordArray = sub.components(separatedBy: ">")
for word in wordArray {
if !word.contains("<") {
continue
}
//取出每个单词的开始时间
let arr = String(word[word.range(of: "<")!.upperBound...])
let start = Double(arr.components(separatedBy: ",")[0])!
let length = Double(arr.components(separatedBy: ",")[1])!
oneLineArray.append((start, length))
}
timeArray.append(oneLineArray)
}
return timeArray
}
/// 获取每一行的元组数组
/// (start: String, length: String) (start: 开始时间, length: 持续时间)
/// - Parameter lrc: krc歌词
/// - Returns: 每一行的元组数组
static func startTimes(lrc: String) -> [(start: Double, length: Double)] {
let separatedBy = lrc.contains("\r\n") ? "\r\n" : "\n"
//获取字符串：从[offset:0]后面的字符开始
let lrcs = String(lrc[lrc.range(of: "[offset:0]")!.upperBound...])
let lrcArray = lrcs.components(separatedBy: separatedBy)
var timeArray = [(start: Double, length: Double)]()
for lineLrc in lrcArray {
if lineLrc.count == 0 {
continue
}
// [669,850]<0,200>那<200,200>时<400,250>的<650,200>光
let arr = String(lineLrc[lineLrc.range(of: "[")!.upperBound..<lineLrc.range(of: "]")!.lowerBound])
let start = Double(arr.components(separatedBy: ",")[0])!
let length = Double(arr.components(separatedBy: ",")[1])!
timeArray.append((start, length))
}
return timeArray
}
/// 得到不带时间的歌词的数组
///
/// - Parameter lrc: krc歌词
/// - Returns: 每行每个单词的数组
static func lineLyrics(lrc: String) -> [[String]] {
let separatedBy = lrc.contains("\r\n") ? "\r\n" : "\n"
//获取字符串：从[offset:0]后面的字符开始
let lrcs = String(lrc[lrc.range(of: "[offset:0]")!.upperBound...])
let lrcArray = lrcs.components(separatedBy: separatedBy)
var wordArr = [[String]]()
for lineLrc in lrcArray {
if lineLrc.count == 0 {
continue
}
// [669,850]<0,200>那<200,200>时<400,250>的<650,200>光
var lineArr = [String]()
let newArr = lineLrc.components(separatedBy: ">")
for (id, value) in newArr.enumerated() {
if id == 0 {
continue
}
var s = ""
if id == (newArr.count-1) {
s = String(value[value.startIndex...])
}else {
s = String(value[value.startIndex ..< value.range(of: "<")!.lowerBound])
}
lineArr.append(s)
}
wordArr.append(lineArr)
}
return wordArr
}
}
// MARK: - hrcs tools
extension LyricTools {
/// 获取每一行的每一个字的元组数组
/// (start: String, length: String) (start: 开始时间, length: 持续时间)
/// - Parameter lrc: hrcs歌词
/// - Returns: 每一行的每一个字的元组数组
static func hrcs_wordTimes(lrc: String) -> [[(start: Double, length: Double)]] {
let separatedBy = lrc.contains("\r\n") ? "\r\n" : "\n"
//获取字符串：从 haplayer.lrc 后面的字符开始
let lrcs = String(lrc[lrc.range(of: "haplayer.lrc")!.lowerBound...])
let lrcArray = lrcs.components(separatedBy: separatedBy)
var timeArray = [[(start: Double, length: Double)]]()
for lineLrc in lrcArray {
if lineLrc.count == 0 {
continue
}
// haplayer.lrc('<5100,11470>','<问><心><( ><主><题><曲><)>','<1000,1010,710,910,910,900,930>');
let wordArray = lineLrc.components(separatedBy: ",'")
let arr = String(wordArray[2][wordArray[2].range(of: "<")!.upperBound ..< wordArray[2].range(of: ">")!.lowerBound])
let arrs = arr.components(separatedBy: ",").map { (Double(0), Double($0)!) }
timeArray.append(arrs)
}
return timeArray
}
/// 获取每一行的元组数组
/// (start: String, length: String) (start: 开始时间, length: 持续时间)
/// - Parameter lrc: hrcs歌词
/// - Returns: 每一行的元组数组
static func hrcs_startTimes(lrc: String) -> [(start: Double, length: Double)] {
let separatedBy = lrc.contains("\r\n") ? "\r\n" : "\n"
//获取字符串：从 haplayer.lrc 后面的字符开始
let lrcs = String(lrc[lrc.range(of: "haplayer.lrc")!.lowerBound...])
let lrcArray = lrcs.components(separatedBy: separatedBy)
var timeArray = [(start: Double, length: Double)]()
for lineLrc in lrcArray {
if lineLrc.count == 0 {
continue
}
// haplayer.lrc('<5100,11470>','<问><心><( ><主><题><曲><)>','<1000,1010,710,910,910,900,930>');
let wordArray = lineLrc.components(separatedBy: ",'")
let arr = String(wordArray[0][wordArray[0].range(of: "<")!.upperBound ..< wordArray[0].range(of: ">")!.lowerBound])
let start = Double(arr.components(separatedBy: ",")[0])!
let end = Double(arr.components(separatedBy: ",")[1])!
timeArray.append((start, end - start))
}
return timeArray
}
/// 得到不带时间的歌词的数组
///
/// - Parameter lrc: hrcs歌词
/// - Returns: 每行每个单词的数组
static func hrcs_lineLyrics(lrc: String) -> [[String]] {
let separatedBy = lrc.contains("\r\n") ? "\r\n" : "\n"
//获取字符串：从 haplayer.lrc 后面的字符开始
let lrcs = String(lrc[lrc.range(of: "haplayer.lrc")!.lowerBound...])
let lrcArray = lrcs.components(separatedBy: separatedBy)
var wordArr = [[String]]()
for lineLrc in lrcArray {
if lineLrc.count == 0 {
continue
}
// haplayer.lrc('<5100,11470>','<问><心><( ><主><题><曲><)>','<1000,1010,710,910,910,900,930>');
let wordArray = lineLrc.components(separatedBy: ",'")
let newArr = wordArray[1].components(separatedBy: "<")
var lineArr = [String]()
for (id, value) in newArr.enumerated() {
if id == 0 {
continue
}
let s = String(value[value.startIndex ..< value.range(of: ">")!.lowerBound])
lineArr.append(s)
}
wordArr.append(lineArr)
}
return wordArr
}
}
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