生成指定长度的Wav空白文件--附带源码

#include <iostream> #include <fstream> #include <sstream> #include <cstdlib> using namespace std; //one ms -- 8 bytes int main(int num,char* names[]) { long long l,rtime,t;unsigned char *p; if(num==1||num>2) { cout<<"[ERROR]Need Argument : Total Time (ms) ."<<endl; exit(-1); } stringstream x; x<<names[1]; x>>rtime; l=rtime*8+58; ofstream out("mkwav-out.wav"); out<<'R'<<'I'<<'F'<<'F'; l-=8; p=(unsigned char *)&l; out<<p[0]<<p[1]<<p[2]<<p[3]<<'W'<<'A'<<'V'<<'E'<<'f'<<'m'<<'t'<<' '; t=0x12; //??? p=(unsigned char *)&t; out<<p[0]<<p[1]<<p[2]<<p[3]<<(unsigned char)1<<(unsigned char)0<<(unsigned char)1<<(unsigned char)0; t=8000; out<<p[0]<<p[1]<<p[2]<<p[3]<<p[0]<<p[1]<<p[2]<<p[3]<<(unsigned char)1<<(unsigned char)0<<(unsigned char)8<<(unsigned char)0<<(unsigned char)0<<(unsigned char)0<<'f'<<'a'<<'c'<<'t'<<(unsigned char)4<<(unsigned char)0<<(unsigned char)0<<(unsigned char)0<<(unsigned char)231<<(unsigned char)50<<(unsigned char)0<<(unsigned char)0<<'d'<<'a'<<'t'<<'a'; l-=50; p=(unsigned char *)&l; out<<p[0]<<p[1]<<p[2]<<p[3]; for(int i=0;i<rtime*8;i++) out<<(unsigned char)127; out.close(); return 0; }