C++读取WAV音频文件的头部数据的实现方法

前言：

在这里分享一下自己的心得，希望和大家一起分享技术，如果有什么不足，还请大家指正。写出这篇目的，就是希望大家一起成长，我也相信技术之间没有高低，只有互补，只有分享，才能使彼此更加成长。

实现代码：

#include

#include

#include

using namespace std;

using std::string;

using std::fstream;

typedef struct WAV_HEADER{

char RIFF[4]; // RIFF Header Magic header

unsigned long ChunkSize; // RIFF Chunk Size

char WAVE[4]; // WAVE Header

char fmt[4]; // FMT header

unsigned long Subchunk1Size; // Size of the fmt chunk

unsigned short AudioFormat; // Audio format 1=PCM,6=mulaw,7=alaw, 257=IBM Mu-Law, 258=IBM A-Law, 259=ADPCM

unsigned short NumOfChan; // Number of channels 1=Mono 2=Sterio

unsigned long SamplesPerSec; // Sampling Frequency in Hz

unsigned long bytesPerSec; // bytes per second

unsigned short blockAlign; // 2=16-bit mono, 4=16-bit stereo

unsigned short bitsPerSample; // Number of bits per sample

char Subchunk2ID[4]; // "data" string

unsigned long Subchunk2Size; // Sampled data length

}wav_hdr;

// Function prototypes

int getFileSize(FILE *inFile);

int main(int argc,char *argv[]){

wav_hdr wavHeader;

FILE *wavFile;

int headerSize = sizeof(wav_hdr),filelength = 0;

string answer;

do{

string input;

string answer;

const char* filePath;

cout << "Pick wav file from the Windows Media File: ";

cin >> input;

cin.get();

cout << endl;

path = "C:\\Windows\\Media\\" + input + ".wav";

filePath = path.c_str();

wavFile = fopen( filePath , "r" );

if(wavFile == NULL){

printf("Can not able to open wave file\n");

//exit(EXIT_FAILURE);

}

fread(&wavHeader,headerSize,1,wavFile);

filelength = getFileSize(wavFile);

fclose(wavFile);

cout << "File is :" << filelength << " bytes." << endl;

cout << "RIFF header :" << wavHeader.RIFF[0]

<< wavHeader.RIFF[1]

<< wavHeader.RIFF[2]

<< wavHeader.RIFF[3] << endl;

cout << "WAVE header :" << wavHeader.WAVE[0]

<< wavHeader.WAVE[1]

<< wavHeader.WAVE[2]

<< wavHeader.WAVE[3]

<< endl;

cout << "FMT :" << wavHeader.fmt[0]

<< wavHeader.fmt[1]

<< wavHeader.fmt[2]

<< wavHeader.fmt[3]

<< endl;

cout << "Data size :" << wavHeader.ChunkSize << endl;

// Display the sampling Rate form the header

cout << "Sampling Rate :" << wavHeader.SamplesPerSec << endl;

cout << "Number of bits used :" << wavHeader.bitsPerSample << endl;

cout << "Number of channels :" << wavHeader.NumOfChan << endl;

cout << "Number of bytes per second :" << wavHeader.bytesPerSec << endl;

cout << "Data length :" << wavHeader.Subchunk2Size << endl;

cout << "Audio Format :" << wavHeader.AudioFormat << endl;

// Audio format 1=PCM,6=mulaw,7=alaw, 257=IBM Mu-Law, 258=IBM A-Law, 259=ADPCM

cout << "Block align :" << wavHeader.blockAlign << endl;

cout << "Data string :" << wavHeader.Subchunk2ID[0]

<< wavHeader.Subchunk2ID[1]

<< wavHeader.Subchunk2ID[2]

<< wavHeader.Subchunk2ID[3]

<< endl;

cout << endl << endl << "Try something else? (y/n)";

cin >> answer;

//cin.get();

cout << endl << endl;

}while( answer == "y" );

getchar();

return 0;

}

// find the file size

int getFileSize(FILE *inFile){

int fileSize = 0;

fseek(inFile,0,SEEK_END);

fileSize=ftell(inFile);

fseek(inFile,0,SEEK_SET);

return fileSize;

}

如有疑问请留言或者到本站社区交流讨论，感谢阅读，希望通过本文能帮助到大家，谢谢大家对本站的支持！