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Simple Mixer Control Wrapper

, 9 Jan 2000 184.9K 2.4K 42
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A small audio mixer control wrapper
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    This is small and useful C++ class which can encapsulate any windows multimedia mixer control.

    I wrote a simple class CAlexfMixer to wrap any multimedia mixer control. You can manipulate the Master Volume, Mute or someone elses mixer control with this class, as long as the control support these operations. You can also retrieve information such as the Peak Meter.

    Let's look at class definition:

    class CAlexfMixer
    {
    protected:
      HMIXER m_HMixer;
      INT m_iMixerControlID;
      MMRESULT mmr;
      DWORD m_dwChannels;
      BOOL m_bSuccess;
      void ZeroAll();
    public:
      BOOL IsOk() {return m_bSuccess;};
      BOOL On();
      BOOL Off();
      DWORD GetControlValue();
      BOOL SetControlValue(DWORD dw);
      CAlexfMixer(DWORD DstType, DWORD SrcType, DWORD ControlType);
      CAlexfMixer(HWND hwnd, DWORD DstType, DWORD SrcType, DWORD ControlType);
      virtual ~CAlexfMixer();
    };
    

    The class has two constructors - with and without the callback window.

    The class has member IsOk to check whether the specified control can be manipulated, and member functions to get and set the control's state.

    How it works

    Example 1. Master Volume Control.

    CAlexfMixer mixer(m_hWnd, MIXERLINE_COMPONENTTYPE_DST_SPEAKERS,
                      NO_SOURCE, MIXERCONTROL_CONTROLTYPE_VOLUME);
    if (!mixer.IsOk()) 
       return;
    
    mixer.SetControlValue(500);
    

    First we create an object associated with the Master Volume meter control. The third parameter NO_SOURCE is a constant defined in the header file. It means that the control does not have a source line, only a destination line.

    Second we check if is this type of control available or not.

    Finally, we set the volume to 500.

    Example 2. Master Mute.

    CAlexfMixer mixer(MIXERLINE_COMPONENTTYPE_DST_SPEAKERS,
                      NO_SOURCE, MIXERCONTROL_CONTROLTYPE_MUTE );
    mixer.Off();
    

    Here we create an object associated with Master Mute control, and turn it off.

    License

    This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

    A list of licenses authors might use can be found here

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    About the Author

    Alexander Fedorov
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    Comments and Discussions

     
    Questioncan u guide me i am new for mixer control Pin
    rajneshmalik30-Aug-07 2:18
    memberrajneshmalik30-Aug-07 2:18 
    GeneralNo Mixer Present!!! Pin
    DexterND14-May-07 1:45
    memberDexterND14-May-07 1:45 
    QuestionHow to choose FrontPanel MIC or BackPanel MIC? Pin
    guzeliang10-Oct-06 15:42
    memberguzeliang10-Oct-06 15:42 
    AnswerRe: How to choose FrontPanel MIC or BackPanel MIC? Pin
    guzeliang11-Oct-06 17:09
    memberguzeliang11-Oct-06 17:09 
    GeneralHow did you solve that problem? Pin
    cheong junhwan26-Aug-07 23:50
    membercheong junhwan26-Aug-07 23:50 
    GeneralNEW VERSION Pin
    uwgmxbscdb@mailinator.com21-Apr-06 15:43
    memberuwgmxbscdb@mailinator.com21-Apr-06 15:43 
    GeneralMute or Pause Sounds from other Applications Pin
    Suntai7-Feb-06 2:04
    memberSuntai7-Feb-06 2:04 
    Generalmodify change fault code Pin
    JS Lee1-May-05 19:25
    memberJS Lee1-May-05 19:25 
    GeneralForget My Email,Sorry! Pin
    peposi30-Aug-04 22:12
    memberpeposi30-Aug-04 22:12 
    GeneralI Can not Download you code! Pin
    peposi30-Aug-04 22:01
    memberpeposi30-Aug-04 22:01 
    GeneralPeak Meter not working Pin
    Atif Goheer19-Nov-03 7:38
    memberAtif Goheer19-Nov-03 7:38 
    GeneralRe: Peak Meter not working Pin
    AkikoAkikoChan17-Oct-04 17:44
    memberAkikoAkikoChan17-Oct-04 17:44 
    GeneralControlling mic loudness Pin
    In-Chul, Yang24-Jul-03 17:07
    sussIn-Chul, Yang24-Jul-03 17:07 
    GeneralRe: Controlling mic loudness Pin
    FBKK12-Sep-06 22:57
    memberFBKK12-Sep-06 22:57 
    QuestionSolved balance problem? Pin
    geert jacobs8-May-03 22:39
    membergeert jacobs8-May-03 22:39 
    AnswerRe: Solved balance problem? Pin
    geert jacobs8-May-03 22:57
    membergeert jacobs8-May-03 22:57 
    GeneralRe: Solved balance problem? Pin
    AkikoAkikoChan17-Oct-04 17:42
    memberAkikoAkikoChan17-Oct-04 17:42 
    AnswerRe: Solved balance problem? [modified] Pin
    ultraVBCoder25-Jun-06 17:26
    memberultraVBCoder25-Jun-06 17:26 
    GeneralCallback handling Pin
    rjo290928-Apr-03 18:43
    memberrjo290928-Apr-03 18:43 
    Questionhow to close Aux? Pin
    TangQin24-Feb-03 20:44
    memberTangQin24-Feb-03 20:44 
    AnswerRe: how to close Aux? Pin
    TangQin24-Feb-03 21:06
    memberTangQin24-Feb-03 21:06 
    GeneralUnmute does not work. Pin
    Jobe14-Jan-03 4:08
    memberJobe14-Jan-03 4:08 
    GeneralRe: Unmute does not work. Pin
    Jobe14-Jan-03 5:11
    memberJobe14-Jan-03 5:11 
    GeneralRe: Unmute does not work to wave too Pin
    Burgao24-Dec-04 8:32
    memberBurgao24-Dec-04 8:32 
    GeneralRe: Unmute does not work to wave too Pin
    sabit23-Jun-06 18:10
    membersabit23-Jun-06 18:10 
    Generalexcuse me Pin
    NeverGrief21-Nov-02 6:37
    memberNeverGrief21-Nov-02 6:37 
    GeneralQuestion about using this class Pin
    Anonymous20-Aug-02 3:22
    sussAnonymous20-Aug-02 3:22 
    QuestionAbout Recording Control? Pin
    Anonymous8-Aug-02 20:26
    sussAnonymous8-Aug-02 20:26 
    AnswerRe: About Recording Control? Pin
    Anonymous11-Aug-02 5:43
    sussAnonymous11-Aug-02 5:43 
    Generalmix several wav fils Pin
    ER__6-Jan-02 9:55
    memberER__6-Jan-02 9:55 
    GeneralRe: mix several wav fils Pin
    PeteCIS5-Feb-02 7:47
    memberPeteCIS5-Feb-02 7:47 
    GeneralRe: mix several wav fils Pin
    mice16-Aug-02 22:54
    membermice16-Aug-02 22:54 
    if i am talking with two person at the same time.i should mix the voice of them.how i can do that.
    GeneralRe: mix several wav fils Pin
    begray14-Oct-05 21:45
    memberbegray14-Oct-05 21:45 
    GeneralGREAT! And yet so simple! Amazing Pin
    Peter B. Hardwick3-Oct-01 16:54
    memberPeter B. Hardwick3-Oct-01 16:54 
    GeneralDoes not work Pin
    Anonymous2-Jul-01 10:30
    memberAnonymous2-Jul-01 10:30 
    GeneralRecording information Pin
    roland22-Nov-00 6:14
    memberroland22-Nov-00 6:14 
    GeneralWhere can i Find...... Pin
    Jon13-Jul-00 5:18
    sussJon13-Jul-00 5:18 
    GeneralIt's very nice Pin
    alex11-Jan-00 22:04
    sussalex11-Jan-00 22:04 

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