wav音频

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我是靠谱客的博主怕孤单导师，最近开发中收集的这篇文章主要介绍wav音频，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

wav是微软开发的一种音频文件格式，注意，wav文件格式是无损音频文件格式，相对于其他音频格式文件数据是没有经过压缩的，通常文件也相对比较大些。

文件格式如图所示：

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>

struct WAV_Format {
uint32_t ChunkID; /* "RIFF" */
uint32_t ChunkSize; /* 36 + Subchunk2Size */
uint32_t Format; /* "WAVE" */

/* sub-chunk "fmt" */
uint32_t Subchunk1ID; /* "fmt " */
uint32_t Subchunk1Size; /* 16 for PCM */
uint16_t AudioFormat; /* PCM = 1*/
uint16_t NumChannels; /* Mono = 1, Stereo = 2, etc. */
uint32_t SampleRate; /* 8000, 44100, etc. */
uint32_t ByteRate; /* = SampleRate * NumChannels * BitsPerSample/8 */
uint16_t BlockAlign; /* = NumChannels * BitsPerSample/8 */
uint16_t BitsPerSample; /* 8bits, 16bits, etc. */

/* sub-chunk "data" */
uint32_t Subchunk2ID; /* "data" */
uint32_t Subchunk2Size; /* data size */
};

int main(void)
{
FILE *fp = NULL;
struct WAV_Format wav;

fp = fopen("test.wav", "rb");
if (!fp) {
printf("can't open audio filen");
exit(1);
}

fread(&wav, 1, sizeof(struct WAV_Format), fp);

printf("ChunkID t%xn", wav.ChunkID);
printf("ChunkSize t%dn", wav.ChunkSize);
printf("Format tt%xn", wav.Format);
printf("Subchunk1ID t%xn", wav.Subchunk1ID);
printf("Subchunk1Size t%dn", wav.Subchunk1Size);
printf("AudioFormat t%dn", wav.AudioFormat);
printf("NumChannels t%dn", wav.NumChannels);
printf("SampleRate t%dn", wav.SampleRate);
printf("ByteRate t%dn", wav.ByteRate);
printf("BlockAlign t%dn", wav.BlockAlign);
printf("BitsPerSample t%dn", wav.BitsPerSample);
printf("Subchunk2ID t%xn", wav.Subchunk2ID);
printf("Subchunk2Size t%dn", wav.Subchunk2Size);

fclose(fp);

return 0;
}