wav檔案的讀取

wav檔案的讀取，預設為雙聲道（若為單聲道根據頭檔案中的參數做個判斷即可），一個聲道的一組資料為兩個位元組，是以左聲道總資料數為dataSize（位元組為機關）/4

#include <stdlib.h>
#include <stdio.h>
#include<malloc.h>
#include <math.h>

struct RIFF_HEADER
{
    //RIFF_HEADER
    unsigned   char     szRiffID[];           //   'R','I','F','F'
    unsigned   long     dwRiffSize;
    unsigned   char     szRiffFormat[];     //   'W','A','V','E'
    //   WAVE_FORMAT
}riff_header;

struct FMT_BLOCK
{
    //   FMT_BLOCK
    unsigned   char     szFmtID[];           //   'f','m','t','   '
    unsigned   long     dwFmtSize;
    // dwFmtSize為16則其後16位元組，否則為18，末尾有2個位元組的附加資訊

    unsigned   short   wFormatTag;
    unsigned   short   wChannels;
    unsigned   long     dwSamplesPerSec;
    unsigned   long     dwAvgBytesPerSec;
    unsigned   short   wBlockAlign;
    unsigned   short   wBitsPerSample;

    //  unsigned   short   ultraMessage;
}fmt_block;

struct FACT_BLOCK
{
    unsigned   char     szFactID[];   //   'f','a','c','t'
    unsigned   long     dwFactSize;
}fact_block;

struct DATA_BLOCK
{
    //   DATA_BLOCK
    unsigned   char   szDataID[];   //   'd','a','t','a'
    unsigned   long   dwDataSize;
}data_block;


int main()
{
    // int i;   //用作循環計數
    //unsigned char ch[ch_size];  //用來存儲wav檔案的頭資訊
    FILE *fp;
    const char* wav_path= "d:\\wavcs\\cat.wav";

    fp=fopen(wav_path,"rb");//為讀，打開一個wav檔案

    if((fp=fopen(wav_path,"rb"))==NULL) //若打開檔案失敗，退出
    {
        printf("can't open this file\n");
        exit();
    }

    fread(&riff_header,sizeof(struct RIFF_HEADER),,fp);
    printf("riff_header\n");
    printf("%10s%10x%10s",riff_header.szRiffID,riff_header.dwRiffSize,riff_header.szRiffFormat);
    printf("\n");

    fread(&fmt_block,sizeof(struct FMT_BLOCK),,fp);
    printf("fmt_block\n");
    printf("%10s%10x%10x%10x\n%10x%10x%10x%10x",fmt_block.szFmtID,fmt_block.dwFmtSize,fmt_block.wFormatTag,fmt_block.wChannels,fmt_block.dwSamplesPerSec,fmt_block.dwAvgBytesPerSec,fmt_block.wBlockAlign,fmt_block.wBitsPerSample);
    printf("\n");

    fread(&data_block,sizeof(struct DATA_BLOCK),,fp);
    printf("data_block\n");
    printf("%10s%10x",data_block.szDataID,data_block.dwDataSize);
    printf("\n");


    int data_size=data_block.dwDataSize/;
    printf("datasize%d\n",data_size);

    short *datacontent=(short *)malloc(sizeof(short)*data_size);
    fread(&datacontent,sizeof(short),data_size,fp);

    printf("datacontent\n");
    // 讀取資料
    //    int m;//全資料輸出的測試
    //    for(m=354303;m<354304;m++)
    //    {
    //    printf("datacount%d\n",m);
    //    float databyfloat=datacontent[m]/32768.0000;
    //    printf("%0.4f\n",databyfloat);
    //    };


    int i=;//取出右聲道部分
    int n=;

    int single_size=data_block.dwDataSize/;
    printf("singletracksize%d\n",single_size);

    float *singletrackdata = (float *)malloc(single_size*sizeof(float));


    for(;i <data_size;i++) {//取出左聲道部分資料放入數組singletrackdata
        if(i% == ) {
            singletrackdata[n] = datacontent[i]/;
            //printf("singletrackdata%d\n",n+1);
            //printf("%0.4f\n",singletrackdata[n]);
            n++;
        }
    }

    //    int m;//單聲道資料輸出的測試
    //    for(m=354301;m<354304;m++)
    //    {
    //    printf("datacount%d\n",m);
    //    float databyfloat=singletrackdata[m];
    //    printf("%0.4f\n",databyfloat);
    //    };