读取wav文件所有字段，并原封不动写到新的wav文件中代码,C代码库,德仔网

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【C】读取wav文件所有字段，并原封不动写到新的wav文件中

作者:刘小米 / 发布于2014/10/8/ 604

如果了解wav文件的格式，我的代码您一看就懂了。但如果是新手，剖析wav文件的所有格式，有很多文献写的都不全或者有错，请您参照这篇文章的字段介绍，我试了是正确的：http://syp0316.blog.163.com/blog/static/49178801200793133424635/ 读取wav文件的所有字段，并写入新的wav文件，错一个字段都无法播放！！


	#include <iostream>
	#include <fstream>
	#include <string.h>
	#include<math.h>
	#include<cmath>
	#include<stdlib.h>
	#include <bitset>
	#include <iomanip>
	
	using namespace std;
	
	struct my_wave
	{
	 unsigned long chunckId;
	 unsigned long chunkSize;
	 unsigned long format;
	 unsigned long subChunk1Id;
	 unsigned long subChunk1Size;
	 unsigned short audioFormat;
	 unsigned short numChannels;
	 unsigned long sampleRate;
	 unsigned long byteRate;
	 unsigned short blockAlign;
	 unsigned short bitsPerSampel;
	 unsigned long subChunk2Id;
	 unsigned long subChunk2Size;
	 unsigned char *z_data;
	};
	
	int main(int argc, char **argv)
	{
	 ifstream fs;
	 ofstream ofs;
	 my_wave MW;
	 //读取原始文件
	 fs.open("F:\\wave.wav", ios::binary | ios::in); //这句需要修改成您的文件路径
	 ofs.open("F:\\waveout.wav", ios::binary | ios::out); //读取的文件写入新文件
	
	 //读取wav文件的所有字段
	 fs.seekg(0);
	 fs.read((char*)&MW.chunckId, sizeof(MW.chunckId));
	
	 fs.seekg(0x04);
	 fs.read((char*)&MW.chunkSize, sizeof(MW.chunkSize));
	
	 fs.seekg(0x08);
	 fs.read((char*)&MW.format, sizeof(MW.format));
	
	 fs.seekg(0x0c);
	 fs.read((char*)&MW.subChunk1Id, sizeof(MW.subChunk1Id));
	
	 fs.seekg(0x10);
	 fs.read((char*)&MW.subChunk1Size, sizeof(MW.subChunk1Size));
	
	 fs.seekg(0x14);
	 fs.read((char*)&MW.audioFormat, sizeof(MW.audioFormat));
	
	 fs.seekg(0x16);
	 fs.read((char*)&MW.numChannels, sizeof(MW.numChannels));
	
	 fs.seekg(0x18);
	 fs.read((char*)&MW.sampleRate, sizeof(MW.sampleRate));
	
	 fs.seekg(0x1c);
	 fs.read((char*)&MW.byteRate, sizeof(MW.byteRate));
	
	 fs.seekg(0x20);
	 fs.read((char*)&MW.blockAlign, sizeof(MW.blockAlign));
	
	 fs.seekg(0x22);
	 fs.read((char*)&MW.bitsPerSampel, sizeof(MW.bitsPerSampel));
	
	 fs.seekg(0x24);
	 fs.read((char*)&MW.subChunk2Id, sizeof(MW.subChunk2Id));
	
	 fs.seekg(0x28);
	 fs.read((char*)&MW.subChunk2Size, sizeof(MW.subChunk2Size));
	
	 MW.z_data = new unsigned char[MW.subChunk2Size];
	 fs.seekg(0x2c);
	 fs.read((char *)MW.z_data, sizeof(char)*MW.subChunk2Size);
	
	 //输出wav文件的所有字段，以供测试
	 cout << MW.chunckId << endl;
	 cout << MW.chunkSize << endl;
	 cout << MW.format << endl;
	 cout << MW.subChunk1Id << endl;
	 cout << MW.subChunk1Size << endl;
	 cout << MW.audioFormat << endl;
	 cout << MW.numChannels << endl;
	 cout << MW.sampleRate << endl;
	 cout << MW.byteRate << endl;
	 cout << MW.blockAlign << endl;
	 cout << MW.bitsPerSampel << endl;
	 cout << MW.subChunk2Id << endl;
	 cout << MW.subChunk2Size << endl;
	 cout << "采样数据：" << endl;
	 for (int k = 0; k < MW.subChunk2Size; k++){
	 printf("%x ",MW.z_data[k]);
	 }
	
	 //将每个字段原封不动得写入新的.wav文件中
	 ofs.write((char*)&MW.chunckId, sizeof(MW.chunckId));
	 ofs.write((char*)&MW.chunkSize, sizeof(MW.chunkSize));
	 ofs.write((char*)&MW.format, sizeof(MW.format));
	 ofs.write((char*)&MW.subChunk1Id, sizeof(MW.subChunk1Id));
	 ofs.write((char*)&MW.subChunk1Size, sizeof(MW.subChunk1Size));
	 ofs.write((char*)&MW.audioFormat, sizeof(MW.audioFormat));
	 ofs.write((char*)&MW.numChannels, sizeof(MW.numChannels));
	 ofs.write((char*)&MW.sampleRate, sizeof(MW.sampleRate));
	 ofs.write((char*)&MW.byteRate, sizeof(MW.byteRate));
	 ofs.write((char*)&MW.blockAlign, sizeof(MW.blockAlign));
	 ofs.write((char*)&MW.bitsPerSampel, sizeof(MW.bitsPerSampel));
	 ofs.write((char*)&MW.subChunk2Id, sizeof(MW.subChunk2Id));
	 ofs.write((char*)&MW.subChunk2Size, sizeof(MW.subChunk2Size));
	 ofs.write((char*)MW.z_data, sizeof(char)*MW.subChunk2Size);
	
	 fs.close();
	 ofs.close();
	 delete[] MW.z_data;
	 system("pause");
	}

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