package com.qxueyou.scc.sys.utils;

import org.jaudiotagger.audio.AudioFileIO;
import org.jaudiotagger.audio.mp3.MP3AudioHeader;
import org.jaudiotagger.audio.mp3.MP3File;


import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import java.io.File;

public class AudioUtil {



    /**
     * »ñÈ¡ÓïÒôÎļþ²¥·Åʱ³¤(Ãë) Ö§³Öwav ¸ñʽ
     * @param filePath
     * @return
     */
    public static Float getDuration(String filePath){
        try{

            File destFile = new File(filePath);
            AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(destFile);
            AudioFormat format = audioInputStream.getFormat();
            long audioFileLength = destFile.length();
            int frameSize = format.getFrameSize();
            float frameRate = format.getFrameRate();
            float durationInSeconds = (audioFileLength / (frameSize * frameRate));
            return durationInSeconds;

        }catch (Exception e){
            e.printStackTrace();
            return 0f;
        }

    }

    /**
     * »ñÈ¡mp3ÓïÒôÎļþ²¥·Åʱ³¤(Ãë) mp3
     * @param filePath
     * @return
     */
    public static Float getMp3Duration(String filePath){

        try {
            File mp3File = new File(filePath);
            MP3File f = (MP3File) AudioFileIO.read(mp3File);
            MP3AudioHeader audioHeader = (MP3AudioHeader)f.getAudioHeader();
            return Float.parseFloat(audioHeader.getTrackLength()+"");
        } catch(Exception e) {
            e.printStackTrace();
            return 0f;
        }
    }


    /**
     * »ñÈ¡mp3ÓïÒôÎļþ²¥·Åʱ³¤(Ãë)
     * @param mp3File
     * @return
     */
    public static Float getMp3Duration(File mp3File){

        try {
            //File mp3File = new File(filePath);
            MP3File f = (MP3File) AudioFileIO.read(mp3File);
            MP3AudioHeader audioHeader = (MP3AudioHeader)f.getAudioHeader();
            return Float.parseFloat(audioHeader.getTrackLength()+"");
        } catch(Exception e) {
            e.printStackTrace();
            return 0f;
        }
    }


    /**
     * µÃµ½pcmÎļþµÄºÁÃëÊý
     *
     * pcmÎļþÒôƵʱ³¤¼ÆËã
     * ͬͼÏñbmpÎļþÒ»Ñù£¬pcmÎļþ±£´æµÄÊÇδѹËõµÄÒôƵÐÅÏ¢¡£ 16bits ±àÂëÊÇÖ¸£¬Ã¿´Î²ÉÑùµÄÒôƵÐÅÏ¢ÓÃ2¸ö×Ö½Ú±£´æ¡£¿ÉÒÔ¶Ô±ÈÏÂbmpÎļþÓ÷ֱðÓÃ2¸ö×Ö½Ú±£´æRGBÑÕÉ«µÄÐÅÏ¢¡£ 16000²ÉÑùÂÊ ÊÇÖ¸ 1ÃëÖÓ²ÉÑù 16000´Î¡£³£¼ûµÄÒôƵÊÇ44100HZ£¬¼´Ò»Ãë²ÉÑù44100´Î¡£ µ¥ÉùµÀ£º Ö»ÓÐÒ»¸öÉùµÀ¡£
     *
     * ¸ù¾ÝÕâЩÐÅÏ¢£¬ÎÒÃÇ¿ÉÒÔ¼ÆË㣺 1ÃëµÄ16000²ÉÑùÂÊÒôƵÎļþ´óСÊÇ 2*16000 = 32000×Ö½Ú £¬Ô¼Îª32K 1ÃëµÄ8000²ÉÑùÂÊÒôƵÎļþ´óСÊÇ 2*8000 = 16000×Ö½Ú £¬Ô¼Îª 16K
     *
     * Èç¹ûÒÑ֪¼Òôʱ³¤£¬¿ÉÒÔ¸ù¾ÝÎļþµÄ´óС¼ÆËã²ÉÑùÂÊÊÇ·ñÕý³£¡£
     * @param filePath
     * @return
     */
    public static long getPCMDurationMilliSecond(String filePath) {
        File file = new File(filePath);

        //µÃµ½¶àÉÙÃë
        long second = file.length() / 32000 ;

        long milliSecond = Math.round((file.length() % 32000)   / 32000.0  * 1000 ) ;

        return second * 1000 + milliSecond;
    }
}