PCM錄音數據轉Wav格式（c語言版）

#include <stdlib.h>

#include "WaveHeader.h"

// wav頭部結構體

struct wave_header {

char riff[4];

unsignedlong fileLength;

char wavTag[4];

char fmt[4];

unsignedlong size;

unsignedshort formatTag;

unsignedshort channel;

unsignedlong sampleRate;

unsignedlong bytePerSec;

unsignedshort blockAlign;

unsignedshort bitPerSample;

char data[4];

unsignedlong dataSize;

};

void *createWaveHeader(int fileLength, short channel, int sampleRate, short bitPerSample)

{

structwave_header *header = malloc(sizeof(structwave_header));

if (header == NULL) {

    return  NULL;

}

// RIFF

   header->riff[0] = 'R';

   header->riff[1] = 'I';

   header->riff[2] = 'F';

   header->riff[3] = 'F';

// file length

   header->fileLength = fileLength + (44 - 8);

// WAVE

   header->wavTag[0] = 'W';

   header->wavTag[1] = 'A';

   header->wavTag[2] = 'V';

   header->wavTag[3] = 'E';

// fmt

   header->fmt[0] = 'f';

   header->fmt[1] = 'm';

   header->fmt[2] = 't';

   header->fmt[3] = ' ';

   header->size = 16;

   header->formatTag = 1;

   header->channel = channel;

   header->sampleRate = sampleRate;

   header->bitPerSample = bitPerSample;

   header->blockAlign = (short)(header->channel * header->bitPerSample / 8);

   header->bytePerSec = header->blockAlign * header->sampleRate;

// data

   header->data[0] = 'd';

   header->data[1] = 'a';

   header->data[2] = 't';

   header->data[3] = 'a';

// data size

   header->dataSize = fileLength;

return header;

}

使用示例：

// fileLength 原始錄音數據長度

// 1 表示 單聲道

// 16000 採樣率

//  16 表示每一個採樣點是16個bit

void *header = createWaveHeader(fileLength, 1, 16000, 16);

// 使用。。。。

free(header);