Basic steps and ideas: Set the audio collection parameters (sampling rate, channel, etc.), open the audio device and open the cache, and operate the data. 1. Define audio acquisition parameters
Waveformatex Waveform; // Wave Mode Collection Parameters
Typedef struct {
Word wformattag;
Word nchaneless;
DWORD NSAMPLESPERSEC;
DWORD NAVGBYTESPERSEC;
Word nblockalign;
Word wbitsPersample;
Word cbsize;
Waveformatex; WAVEFORMATEX;
Waveform.wformattag = Wave_FORMAT_PCM;
Waveform.nchannels = 1; // The channel is set to 1
Waveform.nsamplespersec = 11025; // Sample rate 11025
Waveform.navgbytespersec = 11025;
Waveform.nblockAlign = 1;
Waveform.wbitsPersample = 8; // The data bit is set to 8 digits
Waveform.cbsize = 0;
PWAVEHDR PWAVEHDR1, PWAVEHDR2; / / WAVE waveform header information 2. Open the audio acquisition device and open a cache
IF (Waveinin (& Hwavein, Wave_Mapper, & Waveform, (DWORD) THIS-> M_HWND, NULL, CALLBACK_WINDOW) {// Open Device
Free (PBuffer1);
Free (PBuffer2);
MessageBeep (MB_ICONEXCLAMATION);
AfxMessageBox ("Audio Can not be open!");
}
PWAVEHDR1-> LPDATA = (LPTSTSTS) PBUFFER1;
PWAVEHDR1-> dwbufferLength = INP_BUFFER_SIZE;
PWAVEHDR1-> DWBYTESRECORDED = 0;
PWAVEHDR1-> dwuser = 0;
PWAVEHDR1-> dwflags = 0;
PWAVEHDR1-> dwloops = 1;
PWAVEHDR1-> lpnext = NULL;
PWAVEHDR1-> reserved = 0;
WaveInpreparehead (Hwavein, PWaveHDR1, SIZEOF (WaveHDR));
PWAVEHDR2-> lpdata = (lptstr) PBuffer2;
PWAVEHDR2-> dwbufferLength = INP_BUFFER_SIZE;
PWAVEHDR2-> dwbytessrecorded = 0;
PWAVEHDR2-> dwuser = 0;
PWAVEHDR2-> dwflags = 0;
PWAVEHDR2-> dwloops = 1;
PWAVEHDR2-> lpnext = null;
PWAVEHDR2-> reserved = 0;
WaveinPrepareheader (Hwavein, PWaveHDR2, SIZEOF (WaveHDR));
//
PsaveBuffer = (PBYTE) Realloc (psavebuffer, 1);
// add the buffers
Waveinaddbuffer (Hwavein, PWaveHDR1, SIZEOF (WaveHDR));
WaveinaddBuffer (Hwavein, PWaveHDR2, SIZEOF (WaveHDR)); 3. Audio data acquired
There are several messages in Wavein
MM_WOM_OPEN / / Open
MM_WIM_DATA // Acquisition and operation of device data
MM_WIM_CLOSE // device close
Void CRecordhWnddlg :: OnMM_WIM_DATA (Uint WPARAM, Long LPARAM)
{
// Todo: add your message handler code here and / or call default
// Reallocate Save Buffer Memory
//
PnewBuffer = (Pbyte) Realloc (Psavebuffer, DwdatAngth
(PWaveHDR) LPARAM -> DWBYTESRecorded;
IF (pnewbuffer == null)
{
Waveinclose (hwavein);
MessageBeep (MB_ICONEXCLAMATION);
AfxMessageBox ("Erro Memory");
Return;
}
Psavebuffer = pnewbuffer;
//
CopyMemory (psavebuffer dwdatalength, ((pWaveHDR) LPARAM -> LPDATA,
(PWaveHDR) LPARAM -> DWBYTESRecorded;
DWDATALENGTH = (PWAVEHDR) LPARAM -> DWBYTESRECORDED;
IF (bending)
{
Waveinclose (hwavein);
Return;
}
CFILE FILE;
File.open ("DATA.TXT", CFile :: ModeWrite | CFILE :: MODECREATE);
File.write (PsaveBuffer, Dwdatarativeth);
File.Close ();
// send Out a new buffer
Waveinaddbuffer (Hwavein, (PWaveHDR) LParam, Sizeof (WaveHDR));
Trace ("DONE INPUT DATA / N");
Return;
}
