package com.atguigu.mobileplayer1020.utils;
import com.atguigu.mobileplayer1020.bean.LyricBean;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
/**
* 作者：尚硅谷-杨光福 on 2017/1/13 15:25
* 微信：yangguangfu520
* QQ号：541433511
* 作用：歌词解析工具类
*/
public class LyricParaser {
private ArrayList<LyricBean> lyricBeens;
/*
得到歌词列表
*/
public ArrayList<LyricBean> getLyricBeens() {
return lyricBeens;
}
/**
* 是否歌词存在
* @return
*/
public boolean isExistsLyric() {
return isExistsLyric;
}
private boolean isExistsLyric = false;
public void readFile(File file) {
if (file == null || !file.exists()) {
//歌词文件不存在
lyricBeens = null;
isExistsLyric = false;
} else {
lyricBeens = new ArrayList<>();
isExistsLyric = true;
//歌词文件存在
//解析歌词-一句一句
BufferedReader reader = null;
try {
reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), getCharset(file)));
String line;
while ((line = reader.readLine()) != null) {
line = analyzeLyrc(line);
}
} catch (Exception e) {
e.printStackTrace();
}
//排序
Collections.sort(lyricBeens, new MyComparator());
//计算每句的高亮时间
for (int i = 0; i < lyricBeens.size(); i++) {
LyricBean one = lyricBeens.get(i);
if (i + 1 < lyricBeens.size()) {
LyricBean two = lyricBeens.get(i + 1);
one.setSleepTime(two.getTimePoint() - one.getTimePoint());
}
}
}
}
/**
* 判断文件编码
* @param file 文件
* @return 编码：GBK,UTF-8,UTF-16LE
*/
public String getCharset(File file) {
String charset = "GBK";
byte[] first3Bytes = new byte[3];
try {
boolean checked = false;
BufferedInputStream bis = new BufferedInputStream(
new FileInputStream(file));
bis.mark(0);
int read = bis.read(first3Bytes, 0, 3);
if (read == -1)
return charset;
if (first3Bytes[0] == (byte) 0xFF && first3Bytes[1] == (byte) 0xFE) {
charset = "UTF-16LE";
checked = true;
} else if (first3Bytes[0] == (byte) 0xFE
&& first3Bytes[1] == (byte) 0xFF) {
charset = "UTF-16BE";
checked = true;
} else if (first3Bytes[0] == (byte) 0xEF
&& first3Bytes[1] == (byte) 0xBB
&& first3Bytes[2] == (byte) 0xBF) {
charset = "UTF-8";
checked = true;
}
bis.reset();
if (!checked) {
int loc = 0;
while ((read = bis.read()) != -1) {
loc++;
if (read >= 0xF0)
break;
if (0x80 <= read && read <= 0xBF)
break;
if (0xC0 <= read && read <= 0xDF) {
read = bis.read();
if (0x80 <= read && read <= 0xBF)
continue;
else
break;
} else if (0xE0 <= read && read <= 0xEF) {
read = bis.read();
if (0x80 <= read && read <= 0xBF) {
read = bis.read();
if (0x80 <= read && read <= 0xBF) {
charset = "UTF-8";
break;
} else
break;
} else
break;
}
}
}
bis.close();
} catch (Exception e) {
e.printStackTrace();
}
return charset;
}
class MyComparator implements Comparator<LyricBean> {
@Override
public int compare(LyricBean o1, LyricBean o2) {
if (o1.getTimePoint() < o2.getTimePoint()) {
return -1;
} else if (o1.getTimePoint() > o2.getTimePoint()) {
return 1;
} else {
return 0;
}
}
}
/**
* 解析每一句
*
* @param line [02:04.12][03:37.32][00:59.73]我在这里欢笑
* @return
*/
private String analyzeLyrc(String line) {
int pos1 = line.indexOf("[");//0
int pos2 = line.indexOf("]");//9如果没有就返回-1
if (pos1 == 0 && pos2 != -1) {
//解析歌词
//装时间的集合
long[] timeLongs = new long[getCountTag(line)];
String timeStr = line.substring(pos1 + 1, pos2);//02:04.12
timeLongs[0] = stTimeToLong(timeStr);//02:04.12-->毫秒
if (timeLongs[0] == -1) {
return "";
}
int i = 1;
String content = line;//[02:04.12][03:37.32][00:59.73]我在这里欢笑
while (pos1 == 0 && pos2 != -1) {
content = content.substring(pos2 + 1);//[03:37.32][00:59.73]我在这里欢笑-->[00:59.73]我在这里欢笑-->我在这里欢笑
pos1 = content.indexOf("[");//0-->-1
pos2 = content.indexOf("]");//9如果没有就返回-1
if (pos2 != -1) {//还有下一句
timeStr = content.substring(pos1 + 1, pos2);//03:37.32-->00:59.73
timeLongs[i] = stTimeToLong(timeStr);//03:37.32-->毫秒
if (timeLongs[i] == -1) {
return "";
}
i++;
}
}
//把解析好的时间和歌词对应起来
LyricBean lyricBean = new LyricBean();
for (int j = 0; j < timeLongs.length; j++) {
if (timeLongs[j] != 0) {
//设置歌词内容
lyricBean.setContent(content);
lyricBean.setTimePoint(timeLongs[j]);
lyricBeens.add(lyricBean);
lyricBean = new LyricBean();
}
}
return content;
}
return null;
}
/**
* 02:04.12-->毫秒
*
* @param timeStr
* @return
*/
private long stTimeToLong(String timeStr) {
long time = -1;
try {
//1.根据":"切成02和04.12
String[] s1 = timeStr.split(":");
//2.根据“.”把04.12切成04和12
String[] s2 = s1[1].split("\\.");
//3.转换成long类型的毫秒时间
//分
long min = Long.valueOf(s1[0]);//02
//秒
long second = Long.valueOf(s2[0]);//04
//毫秒
long mil = Long.valueOf(s2[1]);//12
time = min * 60 * 1000 + second * 1000 + mil * 10;
} catch (Exception e) {
e.printStackTrace();
}
return time;
}
/**
* @param line [02:04.12][03:37.32][00:59.73]我在这里欢笑
* @return
*/
private int getCountTag(String line) {
int count = 1;
String[] left = line.split("\\[");
String[] right = line.split("\\]");
if (left.length == 0 && right.length == 0) {
count = 1;
} else if (left.length > right.length) {
count = left.length;
} else {
count = right.length;
}
return count;
}
}