I am trying to record sound to a .wave file using waveInOpen and co (see here)
Here is my code to record to a buffer and it seems to work :
#include <Windows.h>
#include <MMSystem.h>
#include <iostream>
using namespace std;
int main(){
HWAVEIN microHandle;
WAVEHDR waveHeader;
const int NUMPTS = 22050 * 10; // 10 seconds
int sampleRate = 22050;
short int waveIn[NUMPTS]; // 'short int' is a 16-bit type; I request 16-bit samples below
// for 8-bit capture, you'd use 'unsigned char' or 'BYTE' 8-bit types
MMRESULT result = 0;
WAVEFORMATEX format;
format.wFormatTag=WAVE_FORMAT_PCM; // simple, uncompressed format
format.wBitsPerSample=8; // 16 for high quality, 8 for telephone-grade
format.nChannels=1; // 1=mono, 2=stereo
format.nSamplesPerSec=sampleRate; // 22050
format.nAvgBytesPerSec=format.nSamplesPerSec*format.nChannels*format.wBitsPerSample/8;
// = nSamplesPerSec * n.Channels * wBitsPerSample/8
format.nBlockAlign=format.nChannels*format.wBitsPerSample/8;
// = n.Channels * wBitsPerSample/8
format.cbSize=0;
result = waveInOpen(µHandle, WAVE_MAPPER, &format, 0L, 0L, WAVE_FORMAT_DIRECT);
if (result)
{
cout << "Fail step 1" << endl;
cout << result << endl;
Sleep(10000);
return 0;
}
// Set up and prepare header for input
waveHeader.lpData = (LPSTR)waveIn;
waveHeader.dwBufferLength = NUMPTS*2;
waveHeader.dwBytesRecorded=0;
waveHeader.dwUser = 0L;
waveHeader.dwFlags = 0L;
waveHeader.dwLoops = 0L;
waveInPrepareHeader(microHandle, &waveHeader, sizeof(WAVEHDR));
// Insert a wave input buffer
result = waveInAddBuffer(microHandle, &waveHeader, sizeof(WAVEHDR));
if (result)
{
cout << "Fail step 2" << endl;
cout << result << endl;
Sleep(10000);
return 0;
}
result = waveInStart(microHandle);
if (result)
{
cout << "Fail step 3" << endl;
cout << result << endl;
Sleep(10000);
return 0;
}
// Wait until finished recording
do {} while (waveInUnprepareHeader(microHandle, &waveHeader, sizeof(WAVEHDR))==WAVERR_STILLPLAYING);
waveInClose(microHandle);
return 0;
}
But i didn't find any function or explanation on how to save it on disk
Should i save the WAVEFORMATEX structure ? or are there other things to add to the wave file header ?
The only thing is i have to use windows libraries only, i can't have to install any other
Thank you :)
.WAV
files contain not only raw data, but also include format and extra data, and in general are having RIFF structure.
MSDN explains writing into file e.g. here: Writing to a WAV File.
Additionally, current Windows SDK \Samples\multimedia\directshow\dmo\dmodemo\dsutil.*
files have implementation of similar CWaveFile
class.
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