package?com.lakala.callcenter.utils;

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

public?class?VoxConvert?{

????private?int?convertFormat?=?1;

????private?int?convertRate?=?8000;

????private?int?convertBits?=?1;

????private?final?int?WAV_HEAD?=?36;//?wav文件頭長度

????private?static?final?int?VF_ADPCM?=?1;//?編碼格式

????private?static?final?int?BIT_RATE_VB_8?=?1;//?每個樣本位數(shù)

????private?static?final?int?BIT_RATE_VB_16?=?2;//?每個樣本位數(shù)

????private?final?int?RESET_VALUE?=?48;

????private?byte?out_val;

????/**
?????*?
?????*?@param?inFile
?????*?@param?outFile
?????*?@param?voxFormat?格式?取值范圍:VF_ADPCM?=?1?VF_MULAW?=?2?VF_ALAW?=?3
?????*?@param?voxRate?采樣率?取值范圍：VR_6K?=?6000?VR_8K?=?8000
?????*?@param?bit_rate?位數(shù)?取值范圍：VB_8?=?1?VB_16?=?2
?????*?@return
?????*/
????public?VoxConvert（String?inFile?String?outFile?int?voxFormat?int?voxRate?int?bit_rate）?throws?Exception?{
????????if?（voxFormat?!=?0）?{
????????????convertFormat?=?voxFormat;
????????}
????????if?（voxRate?!=?0）?{
????????????convertRate?=?voxRate;
????????}
????????if?（bit_rate?!=?0）?{
????????????convertBits?=?bit_rate;
????????}
????????if?（outFile?==?null）?{
????????????outFile?=?inFile.substring（0?inFile.length（）?-?3）;
????????????outFile?=?outFile?+?“wav“;
????????}

????????File?outF?=?new?File（outFile）;
????????File?inF?=?new?File（inFile）;

????????long?inFileSize?=?inF.length（）;
????????if?（voxFormat?==?VF_ADPCM）?{?//?if?using?ADPCM?input?format...
????????????inFileSize?=?inFileSize?*?2;
????????}//?change?from?bytes?to?samples

????????FileOutputStream?filewriter?=?new?FileOutputStream（outF?false）;
????????String?wavBegin?=?“RIFF“;
????????filewriter.write（wavBegin.getBytes（））;//?WAV?文件頭

????????long?wavLength?=?inFileSize?*?bit_rate?+?WAV_HEAD;
????????byte[]?tmpArr?=?new?byte[4];
????????longToIntBinary（wavLength?tmpArr?0）;
????????filewriter.write（tmpArr）;//?文件總長度

????????String?wavTag?=?“WAVEfmt?“;
????????filewriter.write（wavTag.getBytes（））;//?WAV?文件標識

????????int?headLength?=?16;
????????tmpArr?=?new?byte[4];
????????longToIntBinary（headLength?tmpArr?0）;
????????filewriter.write（tmpArr）;//?size?of?.WAV?file?header

????????int?wFormatTag?=?1;?//?format?tag?（01?=?Windows?PCM）
????????tmpArr?=?new?byte[2];
????????toShortBinary（wFormatTag?tmpArr?0）;
????????filewriter.write（tmpArr）;//?format?tag?（01?=?Windows?PCM）

????????int?nChannels?=?1;?//?channels?（1=mono?2=stereo）
????????tmpArr?=?new?byte[2];
????????toShortBinary（nChannels?tmpArr?0）;
????????filewriter.write（tmpArr）;//?channels?（1=mono?2=stereo）

????????int?nSamplesPerSec?=?voxRate;?//?samples?per?second
????????tmpArr?=?new?byte[4];
????????longToIntBinary（nSamplesPerSec?tmpArr?0）;
????????filewriter.write（tmpArr）;

????????int?nAvgBytesPerSec?=?voxRate?*?bit_rate;?//?bytes?per?second
????????//?during?play
????????tmpArr?=?new?byte[4];
????????longToIntBinary（nAvg