DELPHI 内进行音量控制及静音

网络 Delphi

本文整理自网络，侵删。

 
unit UMute;
interface
uses MMSystem, Dialogs;
Type
  TDeviceName = (Master, Microphone, WaveOut, Synth);
function  GetVolume(DN:TDeviceName) : Word ;
procedure SetVolume(DN:TDeviceName; Value:Word);
function  GetVolumeMute(DN:TDeviceName) : Boolean;
procedure  SetVolumeMute(DN:TDeviceName; Value:Boolean);
implementation
//获取音量
function GetVolume(DN:TDeviceName) : Word;
var
  hMix: HMIXER;
  mxlc: MIXERLINECONTROLS;
  mxcd: TMIXERCONTROLDETAILS;
  vol: TMIXERCONTROLDETAILS_UNSIGNED;
  mxc: MIXERCONTROL;
  mxl: TMixerLine;
  intRet: Integer;
  nMixerDevs: Integer;
begin
  Result:=0;
  // Check if Mixer is available
  nMixerDevs := mixerGetNumDevs();
  if (nMixerDevs < 1) then Exit;
  // open the mixer
  intRet := mixerOpen(@hMix, 0, 0, 0, 0);
  if intRet = MMSYSERR_NOERROR then begin
    case DN of
      Master     :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
      Microphone :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE;
      WaveOut    : mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT;
      Synth      :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER;
    end;
    mxl.cbStruct := SizeOf(mxl);
    // get line info
    intRet := mixerGetLineInfo(hMix, @mxl, MIXER_GETLINEINFOF_COMPONENTTYPE);
    if intRet = MMSYSERR_NOERROR then begin
      FillChar(mxlc, SizeOf(mxlc),0);
      mxlc.cbStruct := SizeOf(mxlc);
      mxlc.dwLineID := mxl.dwLineID;
      mxlc.dwControlType := MIXERCONTROL_CONTROLTYPE_VOLUME;
      mxlc.cControls := 1;
      mxlc.cbmxctrl := SizeOf(mxc);
      mxlc.pamxctrl := @mxc;
      intRet := mixerGetLineControls(hMix, @mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
      if intRet = MMSYSERR_NOERROR then begin
        FillChar(mxcd, SizeOf(mxcd),0);
        mxcd.dwControlID := mxc.dwControlID;
        mxcd.cbStruct := SizeOf(mxcd);
        mxcd.cMultipleItems := 0;
        mxcd.cbDetails := SizeOf(Vol);
        mxcd.paDetails := @vol;
        mxcd.cChannels := 1;
        intRet := mixerGetControlDetails(hMix, @mxcd,MIXER_SETCONTROLDETAILSF_VALUE);
        Result := vol.dwValue ;
        if intRet <> MMSYSERR_NOERROR then
          ShowMessage('GetControlDetails Error');
      end else
        ShowMessage('GetLineInfo Error');
    end;
    mixerClose(hMix);
  end;
end;
//设置音量
procedure setVolume(DN:TDeviceName; Value : Word);
var
  hMix: HMIXER;
  mxlc: MIXERLINECONTROLS;
  mxcd: TMIXERCONTROLDETAILS;
  vol: TMIXERCONTROLDETAILS_UNSIGNED;
  mxc: MIXERCONTROL;
  mxl: TMixerLine;
  intRet: Integer;
  nMixerDevs: Integer;
begin
  // Check if Mixer is available
  nMixerDevs := mixerGetNumDevs();
  if (nMixerDevs < 1) then Exit;
  // open the mixer
  intRet := mixerOpen(@hMix, 0, 0, 0, 0);
  if intRet = MMSYSERR_NOERROR then begin
    case DN of
      Master     : mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
      Microphone : mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE;
      WaveOut    : mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT;
      Synth      : mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER;
    end;
    mxl.cbStruct := SizeOf(mxl);
    // get line info
    intRet := mixerGetLineInfo(hMix, @mxl, MIXER_GETLINEINFOF_COMPONENTTYPE);
    if intRet = MMSYSERR_NOERROR then begin
      FillChar(mxlc, SizeOf(mxlc),0);
      mxlc.cbStruct := SizeOf(mxlc);
      mxlc.dwLineID := mxl.dwLineID;
      mxlc.dwControlType := MIXERCONTROL_CONTROLTYPE_VOLUME;
      mxlc.cControls := 1;
      mxlc.cbmxctrl := SizeOf(mxc);
      mxlc.pamxctrl := @mxc;
      intRet := mixerGetLineControls(hMix, @mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
      if intRet = MMSYSERR_NOERROR then begin
        FillChar(mxcd, SizeOf(mxcd),0);
        mxcd.dwControlID := mxc.dwControlID;
        mxcd.cbStruct := SizeOf(mxcd);
        mxcd.cMultipleItems := 0;
        mxcd.cbDetails := SizeOf(Vol);
        mxcd.paDetails := @vol;
        mxcd.cChannels := 1;
        vol.dwValue := Value;
        intRet := mixerSetControlDetails(hMix, @mxcd,MIXER_SETCONTROLDETAILSF_VALUE);
        if intRet <> MMSYSERR_NOERROR then
          ShowMessage('SetControlDetails Error');
      end else
        ShowMessage('GetLineInfo Error');
    end;
    mixerClose(hMix);
  end;
end;
//获取静音
function  GetVolumeMute(DN:TDeviceName) : Boolean;
var
  hMix: HMIXER;
  mxlc: MIXERLINECONTROLS;
  mxcd: TMIXERCONTROLDETAILS;
  mxc: MIXERCONTROL;
  mxl: TMixerLine;
  intRet: Integer;
  nMixerDevs: Integer;
  mcdMute: MIXERCONTROLDETAILS_BOOLEAN;
begin
  // Check if Mixer is available
  nMixerDevs := mixerGetNumDevs();
  Result:=False;
  if (nMixerDevs < 1) then Exit;
  // open the mixer
  intRet := mixerOpen(@hMix, 0, 0, 0, 0);
  if intRet = MMSYSERR_NOERROR then begin
    case DN of
      Master     :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
      Microphone :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE;
      WaveOut    :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT;
      Synth      :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER;
    end;
    mxl.cbStruct        := SizeOf(mxl);
    // mixerline info
    intRet := mixerGetLineInfo(hMix, @mxl, MIXER_GETLINEINFOF_COMPONENTTYPE);
    if intRet = MMSYSERR_NOERROR then begin
      FillChar(mxlc, SizeOf(mxlc),0);
      mxlc.cbStruct := SizeOf(mxlc);
      mxlc.dwLineID := mxl.dwLineID;
      mxlc.dwControlType := MIXERCONTROL_CONTROLTYPE_MUTE;
      mxlc.cControls := 1;
      mxlc.cbmxctrl := SizeOf(mxc);
      mxlc.pamxctrl := @mxc;
      // Get the mute control
      intRet := mixerGetLineControls(hMix, @mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
      if intRet = MMSYSERR_NOERROR then begin
        FillChar(mxcd, SizeOf(mxcd),0);
        mxcd.cbStruct := SizeOf(TMIXERCONTROLDETAILS);
        mxcd.dwControlID := mxc.dwControlID;
        mxcd.cChannels := 1;
        mxcd.cbDetails := SizeOf(MIXERCONTROLDETAILS_BOOLEAN);
        mxcd.paDetails := @mcdMute;
        // Get  mute
        intRet := mixerGetControlDetails(hMix, @mxcd, MIXER_SETCONTROLDETAILSF_VALUE);
        if mcdMute.fValue = 0 then
          Result:=false
        else
          Result := True;
        if intRet <> MMSYSERR_NOERROR then
          ShowMessage('SetControlDetails Error');
      end else
       ShowMessage('GetLineInfo Error');
    end;
  end;
end;
//获取静音
procedure  SetVolumeMute(DN:TDeviceName; Value:Boolean);
var
  hMix: HMIXER;
  mxlc: MIXERLINECONTROLS;
  mxcd: TMIXERCONTROLDETAILS;
  mxc: MIXERCONTROL;
  mxl: TMixerLine;
  intRet: Integer;
  nMixerDevs: Integer;
  mcdMute: MIXERCONTROLDETAILS_BOOLEAN;
begin
  // Check if Mixer is available
  nMixerDevs := mixerGetNumDevs();
  if (nMixerDevs < 1) then Exit;
  // open the mixer
  intRet := mixerOpen(@hMix, 0, 0, 0, 0);
  if intRet = MMSYSERR_NOERROR then begin
    case DN of
      Master     :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
      Microphone :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE;
      WaveOut    :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT;
      Synth      :  mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER;
    end;
    mxl.cbStruct        := SizeOf(mxl);
    // mixerline info
    intRet := mixerGetLineInfo(hMix, @mxl, MIXER_GETLINEINFOF_COMPONENTTYPE);
    if intRet = MMSYSERR_NOERROR then begin
      FillChar(mxlc, SizeOf(mxlc),0);
      mxlc.cbStruct := SizeOf(mxlc);
      mxlc.dwLineID := mxl.dwLineID;
      mxlc.dwControlType := MIXERCONTROL_CONTROLTYPE_MUTE;
      mxlc.cControls := 1;
      mxlc.cbmxctrl := SizeOf(mxc);
      mxlc.pamxctrl := @mxc;
      // Get the mute control
      intRet := mixerGetLineControls(hMix, @mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
      if intRet = MMSYSERR_NOERROR then begin
        FillChar(mxcd, SizeOf(mxcd),0);
        mxcd.cbStruct := SizeOf(TMIXERCONTROLDETAILS);
        mxcd.dwControlID := mxc.dwControlID;
        mxcd.cChannels := 1;
        mxcd.cbDetails := SizeOf(MIXERCONTROLDETAILS_BOOLEAN);
        mxcd.paDetails := @mcdMute;
        if Value then
          mcdMute.fValue:=1
        else
          mcdMute.fValue:=0;
        // Get  mute
        intRet := mixerSetControlDetails(hMix, @mxcd, MIXER_SETCONTROLDETAILSF_VALUE);
        if intRet <> MMSYSERR_NOERROR then
          ShowMessage('SetControlDetails Error');
      end else
       ShowMessage('GetLineInfo Error');
    end;
  end;
end;
end.
--------------------- 
作者：belllab 
来源：CSDN 
原文：https://blog.csdn.net/belllab/article/details/1554101 

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