How to convert a PCM format audio file into a wave format file

Recently in making a voice changer app, which used the PCM format to wave format, the following posted source code, hope that with the needs of children's shoes help!!! This is written in the C + + language, or it can be implemented in Java. Of course, Java calls the native function to use the JNI technique. Specific JNI technology to find information on the Internet itself.

CPP file Pcm2Wave.cpp

#include <stdlib.h>#include<string.h>#include<stdio.h>#include"wave.h"#include"constant.h"classpcm2wave{Private: Wave_head wave_head; FILE*Src_pcm_file; FILE*Dest_wave_file; Public: Pcm2wave () {memcpy (&wave_head.riff_char,"RIFF",4); memcpy (&wave_head.wave,"WAVE",4); memcpy (&AMP;WAVE_HEAD.FMT,"FMT",4); memcpy (&wave_head.fccid,"fact",4); memcpy (&wave_head.data_field,"Data",4); Wave_head.package_len=0; Wave_head.format_len= -; Wave_head.fixed=1; Wave_head.channel_number=1; //sample rate long int samplespersecWave_head.sample_rate =8000 ; //quantify int bitpersamples=8 orWave_head.bits_per_sample = -; //sampling bytes per byte int BlockaligWave_head.byte_per_sample = Wave_head.channel_number * Wave_head.bits_per_sample/8;//Numchannels * BITSPERSAMPLE/8//number of bytes played per second long int bytepersecWave_head.byte_rate = wave_head.sample_rate * Wave_head.channel_number * wave_head.bits_per_sample/8;//samplerate * numchannels * BITSPERSAMPLE/8wave_head.id=4; Wave_head.dwsize=0; Wave_head.data_len=0; } pcm2wave (Wave_head*pwave_head) {        if(Pwave_head! =NULL) {memcpy (&wave_head, Pwave_head,sizeof(*pwave_head)); }    }        ~Pcm2wave () {}voidSet_channel ( ShortPchannel_number) {Wave_head.channel_number=Pchannel_number; Wave_head.byte_per_sample= Wave_head.channel_number * Wave_head.bits_per_sample/8; Wave_head.byte_rate= Wave_head.sample_rate * Wave_head.channel_number * wave_head.bits_per_sample/8; }        voidSet_sample_rate (intpsample_rate) {Wave_head.sample_rate=psample_rate; Wave_head.byte_rate= Wave_head.sample_rate * Wave_head.channel_number * wave_head.bits_per_sample/8; }        voidSet_bits_per_sample ( Shortpbits_per_sample) {Wave_head.bits_per_sample=pbits_per_sample; Wave_head.byte_per_sample= Wave_head.channel_number * Wave_head.bits_per_sample/8; Wave_head.byte_rate= Wave_head.sample_rate * Wave_head.channel_number * wave_head.bits_per_sample/8; }            intChangeConst Char*srcfile,Const Char*dsetfile) {        intNfilelen =0; intNSize =sizeof(Wave_head); printf ("Wave's head size:%d\n", nSize); Src_pcm_file=NULL; Dest_wave_file=NULL; Src_pcm_file= fopen (Srcfile,"RB"); if(Src_pcm_file = =NULL)return-1; Dest_wave_file= fopen (Dsetfile,"wb+"); if(Dest_wave_file = =NULL)return-2; intNwrite = fwrite (&wave_head,1, NSize, dest_wave_file); if(Nwrite! =nSize)            {fclose (src_pcm_file);            Fclose (Dest_wave_file); return-3; }                 while( !feof (Src_pcm_file)) {            Charreadbuf[4096]; intNread = Fread (Readbuf,1,4096, Src_pcm_file); if(Nread >0) {fwrite (Readbuf,1, Nread, dest_wave_file); } Nfilelen+=nread; } printf ("file pointer location:%d\n", Ftell (dest_wave_file)); //point the cursor pointer of the destination file to the beginning of the fileprintf"size of Nfilelen:%d\n nsize Size:%d\n", Nfilelen, nSize); Fseek (Dest_wave_file,0, Seek_set); Wave_head.package_len= Nfilelen-8+nSize; Wave_head.data_len=Nfilelen; Nwrite= Fwrite (&wave_head,1, NSize, dest_wave_file); if(Nwrite! =nSize)            {fclose (src_pcm_file);            Fclose (Dest_wave_file); return-4;        } fclose (Src_pcm_file);                Fclose (Dest_wave_file); return 0; }    };intMainCharargs [])    {Pcm2wave pp; Pp.set_sample_rate (11025); Pp.change ("JJ.PCM","Jj.wav"); return 0 ;}

Wave.h header File

typedefstructwave_head{Charriff_char[4];//"RIFF" char riff_id[4]= "RIFF"    intPackage_len;//Total file length -8 long int size0= -8    Charwave[4]; Charfmt[4]; intFormat_len;  Short fixed;//fmttag=0x01     ShortChannel_number;//channel=1 or 2    intSample_rate;//sample rate long int samplespersec    intByte_rate;//number of bytes played per second long int bytepersec     ShortByte_per_sample;//sampling bytes per byte int blockalign= channels * Quantization number/8     ShortBits_per_sample;//quantify int bitpersamples=8 or    Charfccid[4];//must be "fact"    intId//must be 0x4    intdwsize;//I don't see any use for a moment .    Chardata_field[4];//data_id= "Data"    intData_len;//number of sampled data bytes long int size2= text length -44} wave_head;

How to convert a PCM format audio file into a wave format file