import?java.io.File;
import?java.io.FileInputStream;
import?java.io.FileOutputStream;
import?java.io.IOException;

class?Adpcm_status?{
????int?last;
????int?step_index;
}

class?Adpcmcode?{
????static?short?step_size[]=?{?16?17?19?21?23?25?28?31?34?37?41
????????????45?50?55?60?66?73?80?88?97?107?118?130?143?157?173
????????????190?209?230?253?279?307?337?371?408?449?494?544?598?658
????????????724?796?876?963?1060?1166?1282?1408?1552?};
????//short?step_adjust?（?char?）;
????void?adpcm_init（?Adpcm_status?stat?）?{
????????stat.last?=?0;
????????stat.step_index?=?0;
????????return;
????}
????/*
????*?Decode?Linear?to?ADPCM
????*/
????short?adpcm_decode（?byte?code?Adpcm_status?stat?）?{
????????short?diff?E?SS?samp;

????????SS?=?step_size[stat.step_index];
????????E?=?（short）?（SS/8）;
????????if?（?（code?&?0x01）!=0?）
????????????E?+=?SS/4;
????????if?（?（code?&?0x02）!=0?）
????????????E?+=?SS/2;
????????if?（?（code?&?0x04）!=0?）
????????????E?+=?SS;
????????diff?=?（（code?&?0x08）!=0）???（short）?-E?:?E;
????????samp?=?（short）?（stat.last?+?diff）;

????????if（?samp?>?2048?）?samp?=?2048;
????????if（?samp?
????????stat.last?=?samp;
????????stat.step_index?+=?step_adjust（（char）?code）;
????????if（?stat.step_index?????????if（?stat.step_index?>?48?）?stat.step_index?=?48;
????????return?（?samp?）;
????}

????/*
????*?adjust?the?step?for?use?on?the?next?sample.
????*/
????short?step_adjust?（?char?code?）?{
????????switch（?code?&?0x07?）?{
????????????case?0x00:
????????????????return（-1）;
????????????case?0x01:
????????????????return（-1）;
????????????case?0x02:
????????????????return（-1）;
????????????case?0x03:
????????????????return（-1）;
????????????case?0x04:
????????????????return（2）;
????????????case?0x05:
????????????????return（4）;
????????????case?0x06:
????????????????return（6）;
????????????case?0x07:
????????????????return（8）;
????????????default:
????????????????return?0;
????????}
????}
};

public?class?AudioUtil?{

????public?static?void?convertAudioFiles（String?srcString?targt）??{
???????/*?String?src=“C:\\Users\\anyone\\Desktop\\9.vox“;
????????String?targt=“C:\\Users\\anyone\\Desktop\\a.wav“;*/
????????FileInputStream?fis?=?null;
????????FileOutputStream?fos?=?null;
????????try?{
????????????int??i?j;
????????????int?n;
????????????int?buffer_size;
????????????short?buffer12[];
????????????byte?adpcm[];
????????????Adpcm_status?coder_stat=new?Adpcm_status（）;
????????????Adpcmcode?adpcmcode=new?Adpcmcode（）;
????????????buffer_size?=?512;
????????????buffer12=?new?short[buffer_size];
????????????byte[]?buffer8=new?byte[buffer_size];
????????????adpcm=new?byte[buffer_size/2];
????????????//開始
????????????fis?=?new?FileInputStream（new?File（src））;
????????????fos?=?new?FileOutputStream（new?File（targt））;
????????????adpcmcode.adpcm_init（?coder_stat?）;//初始化
??????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????5263??2015-09-10?13:49??AudioUtil.java
?????文件??????????55??2015-09-10?13:50??vox轉wav使用.txt
?????文件????????2034??2015-09-10?13:51??WaveHeader.java