我计划创建一个程序来可视化 .wav 文件的音频波形。
到目前为止,我已经开始正确阅读上述 wav 文件的标题部分。我使用的代码是这样的:
#include <iostream>
#include <string>
#include <fstream>
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;
}
我已经尝试了几次,它提供的数据通过 Windows 文件夹中 Media 文件夹中的不同 wav 文件似乎是一致的。
然后下一步是将 wav 文件的实际数据存储在向量中。但是,我对如何做到这一点一无所知。我发现的在线解决方案只能读取头文件。
关于如何存储(并希望显示)wav 文件的实际数据的任何想法?谢谢!