如何將Pcm格式的音頻文件轉換成Wave格式的文件

最近在做一款變聲App，其中就用到了將pcm格式轉wave格式，下面貼出源代碼，希望帶有需求的童鞋有幫助！！！這里是c++語言寫的，也可以用java實現。當然java調用native函數要用到jni技術。具體jni技術自己到網路上找找資料。

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", 4);memcpy(&wave_head.wave, "WAVE", 4);memcpy(&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 = 16;wave_head.fixed =  1;wave_head.channel_number = 1;//  采樣率 long int samplespersecwave_head.sample_rate = 8000 ;// 量化數 int bitpersamples=8或16wave_head.bits_per_sample = 16;//  采樣一次占字節數 int blockaligwave_head.byte_per_sample = wave_head.channel_number *  wave_head.bits_per_sample / 8; //NumChannels * BitsPerSample/8//  每秒播放字節數 long int bytepersecwave_head.byte_rate =     wave_head.sample_rate * wave_head.channel_number * wave_head.bits_per_sample / 8; //SampleRate * NumChannels * BitsPerSample /8
        wave_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(){}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 / 8;wave_head.byte_rate =     wave_head.sample_rate * wave_head.channel_number * wave_head.bits_per_sample / 8;}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 / 8;}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 / 8;wave_head.byte_rate =     wave_head.sample_rate * wave_head.channel_number * wave_head.bits_per_sample / 8;}int change(const char *srcfile, const char *dsetfile){int nFileLen = 0;int nSize = sizeof(wave_head);printf("wave的頭的大小： %d\n", nSize);src_pcm_file = NULL;dest_wave_file = NULL;src_pcm_file = fopen(srcfile, "rb");if (src_pcm_file == NULL)return -1;dest_wave_file = fopen(dsetfile, "wb+");if (dest_wave_file == NULL)return -2;int nWrite = 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)){char readBuf[4096];int nRead = fread(readBuf, 1, 4096, src_pcm_file);if (nRead > 0){fwrite(readBuf, 1, nRead, dest_wave_file); }nFileLen += nRead;}printf("文件指針位置： %d\n", ftell(dest_wave_file));//將目的文件的游標指針指向文件的開頭printf("nFileLen的大小： %d\n nSize的大小：%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;        }};int main(char args [])
{Pcm2Wave pp;pp.set_sample_rate(11025);pp.change("jj.pcm", "jj.wav");return 0 ;
}

wave.h頭文件

typedef struct WAVE_HEAD
{char riff_char[4];   // "RIFF" char riff_id[4]="RIFF"int package_len ;    //文件總長-8 long int size0=文總長-8char wave[4];char fmt[4];int format_len;   short fixed;      //  fmttag=0x01short channel_number;  //  channel=1 或2int   sample_rate;   //  采樣率 long int samplespersecint   byte_rate;   //  每秒播放字節數 long int bytepersecshort byte_per_sample;   //  采樣一次占字節數 int blockalign=聲道數*量化數/8short bits_per_sample;   // 量化數 int bitpersamples=8或16char fccID[4]; // must be "fact"int  id; // must be 0x4int dwSize; // 暫時沒發現有啥用char  data_field[4];   //  data_id="data"int  data_len;  //  采樣數據字節數 long int size2=文長-44
    
} WAVE_HEAD;

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