Recording Program

when I run the following code(REcording),
It doesn't recording ! What is the reason.
Thank You for your help

void PDlg::OnRec()
{
      // TODO: Add your control notification handler code here
      UINT wDeviceID;
      MCI_OPEN_PARMS mciOpen;
    MCI_RECORD_PARMS mciRec;
    MCI_GENERIC_PARMS mciClose;
    MCI_SAVE_PARMS      mciSave;

      wDeviceID = mciOpen.wDeviceID;

    mciRec.dwCallback = 0;
    mciSendCommand(mciOpen.wDeviceID, MCI_RECORD, MCI_WAIT, (DWORD)&mciRec);
      mciSave.lpfilename = "xxx.wav";
      mciSendCommand(wDeviceID, MCI_RECORD, MCI_TO | MCI_WAIT, (DWORD)(LPVOID) &mciRec);
      mciSave.dwCallback = 0;
      mciSendCommand(wDeviceID, MCI_SAVE, MCI_SAVE_FILE | MCI_WAIT, (DWORD)(LPVOID) &mciSave);
    mciClose.dwCallback = 0;
    mciSendCommand(mciOpen.wDeviceID, MCI_CLOSE, 0, (DWORD)&mciClose);
// TODO: Add your control notification handler code here

}
nbaAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

chensuCommented:
You miss out many parameters in your code. You can use the following example code, which is from the documentation.


Recording with a Waveform-Audio Device

The following example opens a waveform-audio device with a new file, records for the specified time, plays the recording, and prompts the user to save the recording if desired.

// Uses the MCI_OPEN, MCI_RECORD, and MCI_SAVE commands to record and
// save a waveform-audio file. Returns 0L if successful; otherwise,
// it returns an MCI error code.
DWORD recordWAVEFile(DWORD dwMilliSeconds)
{
    UINT wDeviceID;
    DWORD dwReturn;
    MCI_OPEN_PARMS mciOpenParms;
    MCI_RECORD_PARMS mciRecordParms;
    MCI_SAVE_PARMS mciSaveParms;
    MCI_PLAY_PARMS mciPlayParms;

    // Open a waveform-audio device with a new file for recording.
    mciOpenParms.lpstrDeviceType = "waveaudio";
    mciOpenParms.lpstrElementName = "";
    if (dwReturn = mciSendCommand(0, MCI_OPEN,
        MCI_OPEN_ELEMENT | MCI_OPEN_TYPE,         (DWORD)(LPVOID) &mciOpenParms))    {
        // Failed to open device; don't close it, just return error.
        return (dwReturn);
    }

    // The device opened successfully; get the device ID.
    wDeviceID = mciOpenParms.wDeviceID;

    // Begin recording and record for the specified number of
    // milliseconds. Wait for recording to complete before continuing.
    // Assume the default time format for the waveform-audio device
    // (milliseconds).
    mciRecordParms.dwTo = dwMilliSeconds;
    if (dwReturn = mciSendCommand(wDeviceID, MCI_RECORD,
        MCI_TO | MCI_WAIT, (DWORD)(LPVOID) &mciRecordParms))
    {
        mciSendCommand(wDeviceID, MCI_CLOSE, 0, NULL);
        return (dwReturn);
    }

    // Play the recording and query user to save the file.
    mciPlayParms.dwFrom = 0L;
    if (dwReturn = mciSendCommand(wDeviceID, MCI_PLAY,
        MCI_FROM | MCI_WAIT, (DWORD)(LPVOID) &mciPlayParms))
    {
        mciSendCommand(wDeviceID, MCI_CLOSE, 0, NULL);
        return (dwReturn);
    }
    if (MessageBox(hMainWnd, "Do you want to save this recording?",
        "", MB_YESNO) == IDNO)
    {
        mciSendCommand(wDeviceID, MCI_CLOSE, 0, NULL);
        return (0L);
    }

    // Save the recording to a file named TEMPFILE.WAV. Wait for
    // the operation to complete before continuing.
    mciSaveParms.lpfilename = "tempfile.wav";
    if (dwReturn = mciSendCommand(wDeviceID, MCI_SAVE,
        MCI_SAVE_FILE | MCI_WAIT, (DWORD)(LPVOID) &mciSaveParms))
    {
        mciSendCommand(wDeviceID, MCI_CLOSE, 0, NULL);
        return (dwReturn);
    }

    return (0L);
}

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
nbaAuthor Commented:
How to assign the  dwMilliSeconds?
 dwMilliSeconds=1000 //(1000 HZ)  
0
chensuCommented:
dwMilliSeconds specifies time in millisecond. If you want to record for 3 seconds (== 3000 milliseconds), dwMilliSeconds = 3000;
0
Become a CompTIA Certified Healthcare IT Tech

This course will help prep you to earn the CompTIA Healthcare IT Technician certification showing that you have the knowledge and skills needed to succeed in installing, managing, and troubleshooting IT systems in medical and clinical settings.

nbaAuthor Commented:
When I check it, It is PCM Mono,11.142Hz
Can I change to 8 bits Stereo?
And The Record file (temp.wav) is created.
However, the content is empty, (No sound in the wav file)
That file is only 1 bytes.
The Coding is not right?
--------------------------
void CAPhoneDlg::OnRec()
{
UINT wDeviceID;

DWORD dwMilliSeconds=0.0000001;
MCI_OPEN_PARMS mciOpenParms;
MCI_OPEN_PARMS mciOpen;

MCI_RECORD_PARMS mciRecordParms;
MCI_SAVE_PARMS mciSaveParms;
MCI_PLAY_PARMS mciPlayParms;
MCI_GENERIC_PARMS mciClose;

mciOpenParms.lpstrDeviceType = "waveaudio";
mciOpenParms.lpstrElementName = "";
mciSendCommand(0, MCI_OPEN, MCI_OPEN_ELEMENT | MCI_OPEN_TYPE, (DWORD)(LPVOID) &mciOpenParms);

wDeviceID = mciOpenParms.wDeviceID;

mciRecordParms.dwTo = dwMilliSeconds;
mciSendCommand(wDeviceID, MCI_RECORD, MCI_TO | MCI_WAIT, (DWORD)(LPVOID) &mciRecordParms);

// Play the recording and query user to save the file.
mciPlayParms.dwFrom = 0L;
mciSendCommand(wDeviceID, MCI_PLAY, MCI_FROM | MCI_WAIT, (DWORD)(LPVOID) &mciPlayParms);


mciSaveParms.lpfilename = "temp.wav";
mciSendCommand(wDeviceID, MCI_SAVE, MCI_SAVE_FILE | MCI_WAIT, (DWORD)(LPVOID) &mciSaveParms);

//???
//??? I hope close all pointer and files. The following code is right?
mciClose.dwCallback = 0;
mciSendCommand(mciOpen.wDeviceID, MCI_CLOSE, 0, (DWORD)&mciClose);

      
}

0
nbaAuthor Commented:
When I check it, It is PCM Mono,11.142Hz
Can I change to 8 bits Stereo?
And The Record file (temp.wav) is created.
However, the content is empty, (No sound in the wav file)
That file is only 1 bytes.
The Coding is not right?
--------------------------
void CAPhoneDlg::OnRec()
{
UINT wDeviceID;

DWORD dwMilliSeconds=0.0000001;
MCI_OPEN_PARMS mciOpenParms;
MCI_OPEN_PARMS mciOpen;

MCI_RECORD_PARMS mciRecordParms;
MCI_SAVE_PARMS mciSaveParms;
MCI_PLAY_PARMS mciPlayParms;
MCI_GENERIC_PARMS mciClose;

mciOpenParms.lpstrDeviceType = "waveaudio";
mciOpenParms.lpstrElementName = "";
mciSendCommand(0, MCI_OPEN, MCI_OPEN_ELEMENT | MCI_OPEN_TYPE, (DWORD)(LPVOID) &mciOpenParms);

wDeviceID = mciOpenParms.wDeviceID;

mciRecordParms.dwTo = dwMilliSeconds;
mciSendCommand(wDeviceID, MCI_RECORD, MCI_TO | MCI_WAIT, (DWORD)(LPVOID) &mciRecordParms);

// Play the recording and query user to save the file.
mciPlayParms.dwFrom = 0L;
mciSendCommand(wDeviceID, MCI_PLAY, MCI_FROM | MCI_WAIT, (DWORD)(LPVOID) &mciPlayParms);


mciSaveParms.lpfilename = "temp.wav";
mciSendCommand(wDeviceID, MCI_SAVE, MCI_SAVE_FILE | MCI_WAIT, (DWORD)(LPVOID) &mciSaveParms);

//???
//??? I hope close all pointer and files. The following code is right?
mciClose.dwCallback = 0;
mciSendCommand(mciOpen.wDeviceID, MCI_CLOSE, 0, (DWORD)&mciClose);

      
}

0
chensuCommented:
Of course it is empty since you record just 0.0000001 milliseconds. You can use MCI_SET command (MCI_WAVE_SET_CHANNELS) to change the recording format.
0
chensuCommented:
DWORD is 32-bit integer. 0.0000001 for DWORD is zero.
0
joedeanCommented:
I want it to record until the user clicks STOP.  I guess I use a callback.  Anyone know they syntax?
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C++

From novice to tech pro — start learning today.