如何将Pcm格式的音频文件转换成Wave格式的文件

最近在做一款变声App，其中就用到了将pcm格式转wave格式，下面贴出源代码，希望带有需求的童鞋有帮助！！！这里是c++语言写的，也可以用java实现。当然java调用native函数要用到jni技术。具体jni技术自己到网路上找找资料。

Cpp文件Pcm2Wave.cpp

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "wave.h"
#include "constant.h"

class Pcm2Wave
{
private:
    WAVE_HEAD wave_head;
    FILE* src_pcm_file;
    FILE* dest_wave_file;
public:
    Pcm2Wave()
    {
        memcpy(&wave_head.riff_char, "RIFF", );
        memcpy(&wave_head.wave, "WAVE", );
        memcpy(&wave_head.fmt, "fmt ", );
        memcpy(&wave_head.fccID, "fact", );
        memcpy(&wave_head.data_field, "data", );
        wave_head.package_len = ;
        wave_head.format_len = ;
        wave_head.fixed =  ;
        wave_head.channel_number = ;
        //  采样率 long int samplespersec
        wave_head.sample_rate =  ;

        // 量化数 int bitpersamples=8或16
        wave_head.bits_per_sample = ;
        //  采样一次占字节数 int blockalig
        wave_head.byte_per_sample = wave_head.channel_number *  wave_head.bits_per_sample / ; //NumChannels * BitsPerSample/8
           //  每秒播放字节数 long int bytepersec
        wave_head.byte_rate =     wave_head.sample_rate * wave_head.channel_number * wave_head.bits_per_sample / ; //SampleRate * NumChannels * BitsPerSample /8

        wave_head.id = ;
        wave_head.dwSize = ;

        wave_head.data_len = ;
    }

    Pcm2Wave(WAVE_HEAD* pwave_head)
    {
        if(pwave_head != NULL)
        {
            memcpy(&wave_head, pwave_head, sizeof(*pwave_head));
        }
    }

    ~Pcm2Wave()
    {}

    void set_channel(short pchannel_number)
    {
        wave_head.channel_number = pchannel_number;
        wave_head.byte_per_sample = wave_head.channel_number *  wave_head.bits_per_sample / ;
        wave_head.byte_rate =     wave_head.sample_rate * wave_head.channel_number * wave_head.bits_per_sample / ;
    }

    void set_sample_rate(int  psample_rate)
    {
        wave_head.sample_rate = psample_rate;
        wave_head.byte_rate =     wave_head.sample_rate * wave_head.channel_number * wave_head.bits_per_sample / ;
    }

    void set_bits_per_sample(short pbits_per_sample)
    {
        wave_head.bits_per_sample =   pbits_per_sample;
        wave_head.byte_per_sample = wave_head.channel_number *  wave_head.bits_per_sample / ;
        wave_head.byte_rate =     wave_head.sample_rate * wave_head.channel_number * wave_head.bits_per_sample / ;
    }

    int change(const char *srcfile, const char *dsetfile)
    {
        int nFileLen = ;
        int nSize = sizeof(wave_head);
        printf("wave的头的大小： %d\n", nSize);
        src_pcm_file = NULL;
        dest_wave_file = NULL;
        src_pcm_file = fopen(srcfile, "rb");
        if (src_pcm_file == NULL)
            return -;

        dest_wave_file = fopen(dsetfile, "wb+");
        if (dest_wave_file == NULL)
            return -;

        int nWrite = fwrite(&wave_head, , nSize, dest_wave_file);
        if (nWrite != nSize)
        {
            fclose(src_pcm_file);
            fclose(dest_wave_file);
            return -;
        }

        while( !feof(src_pcm_file))
        {
            char readBuf[];
            int nRead = fread(readBuf, , , src_pcm_file);
            if (nRead > )
            {
                fwrite(readBuf, , nRead, dest_wave_file);
            }

            nFileLen += nRead;
        }
        printf("文件指针位置： %d\n", ftell(dest_wave_file));
        //将目的文件的游标指针指向文件的开头
        printf("nFileLen的大小： %d\n nSize的大小：%d\n", nFileLen, nSize);
        fseek(dest_wave_file, , SEEK_SET);

        wave_head.package_len = nFileLen -  + nSize;
        wave_head.data_len = nFileLen;
        nWrite = fwrite(&wave_head, , nSize, dest_wave_file);
        if (nWrite != nSize)
        {
            fclose(src_pcm_file);
            fclose(dest_wave_file);
            return -;
        }
        fclose(src_pcm_file);
        fclose(dest_wave_file);

        return ;
    }

};

int main(char args [])
{
    Pcm2Wave pp;
    pp.set_sample_rate();
    pp.change("jj.pcm", "jj.wav");
    return  ;
}

wave.h头文件

typedef struct WAVE_HEAD
{
    char riff_char[];   // "RIFF" char riff_id[4]="RIFF"
    int package_len ;    //文件总长-8 long int size0=文总长-8
    char wave[];
    char fmt[];
    int format_len;
    short fixed;      //  fmttag=0x01
    short channel_number;  //  channel=1 或2
    int   sample_rate;   //  采样率 long int samplespersec
    int   byte_rate;   //  每秒播放字节数 long int bytepersec
    short byte_per_sample;   //  采样一次占字节数 int blockalign=声道数*量化数/8
    short bits_per_sample;   // 量化数 int bitpersamples=8或16
    char fccID[]; // must be "fact"
    int  id; // must be 0x4
    int dwSize; // 暂时没发现有啥用
    char  data_field[];   //  data_id="data"
    int  data_len;  //  采样数据字节数 long int size2=文长-44

} WAVE_HEAD;