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分享c++ 如何获取麦克风收到的声音的音量 根据声音绘制进度条
麦克风接收到一个声音信号,进度条上则产生一定的变化,声音消失后进度条变化消失.
类似于qq的录音功能。
我用wave函数实现了接受到声音，接下来怎么处理呢？？
类似于qq的录音功能。
我用wave函数实现了接受到声音，接下来怎么处理呢？？
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fly_sky010 2015-05-25
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mixer只能用于xp平台，win7下使用com组件
671coder 2015-02-06
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顶一个~！！！！！
SuperCoderJz 2014-06-04
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我用了这个函数 可得到的总时一个数据啊 ，我用的定时器，不断调用这个函数，函数如下：
int CAudio2Dlg::getAudioInputVolum()
{
MMRESULT rc; // 多媒体函数返回结果变量
HMIXER hMixer; // 混合器设备句柄
MIXERLINE mxl; // 音频线路标准状态信息结构体
MIXERLINECONTROLS mxlc; // 音频线路控制器集合信息结构体
MIXERCONTROL mxc; // 单个音频线路控制器信息结构体
//枚举所有声卡驱动，这个枚举很重要。很多代码调用mixOpen时只是用了第一个设备，即
//mixerOpen(&hMixer, 0 , 0 ,0 )，但是我在这个设备下调用mixerGetLineInfo出问题了，
//可能还是跟声卡驱动有关。
for( int deviceID =0 ; true ; deviceID++ )
{
// 打开混合器设备
rc = mixerOpen(&hMixer, // 返回的设备句柄
deviceID, // 单声卡的设备ID为零
0, // 不使用回调机制
0, // 回调函数参数
MIXER_OBJECTF_MIXER); // MIXER_OBJECTF_MIXER宏的值，表示任选有效设备ID
if( MMSYSERR_NOERROR!=rc )
{
//跳出循环
break;
}
// 打开混合器设备无错的话，则
// MIXERLINE 结构体变量清零
ZeroMemory(&mxl, sizeof(MIXERLINE));
mxl.cbStruct = sizeof(MIXERLINE); // 微软用此办法判断版本
// 指出需要获取的通道，声卡的音频输出用MIXERLINE_COMPONENTTYPE_DST_SPEAKERS
mxl.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN;
// 取得混合器设备的指定线路信息
rc = mixerGetLineInfo((HMIXEROBJ)hMixer,
&mxl,
// 取得MIXERLINE::dwComponentType指定类型的第一个音频线路信息
MIXER_OBJECTF_HMIXER|MIXER_GETLINEINFOF_COMPONENTTYPE);
if( rc!=MMSYSERR_NOERROR )
{
//无法获取声音输入线路，尝试其他声卡
continue;
}
// 取得混合器设备的指定线路信息成功的话，则
// 将连接数保存
DWORD dwConnections = mxl.cConnections;
// 准备获取麦克风设备的ID
DWORD dwLineID = -1;
for( DWORD i=0 ; i<dwConnections; i++ )
{
// 枚举每一个设备，当Source的ID等于当前的迭代记数
mxl.dwSource = i;
// 根据SourceID获得连接的信息
rc = mixerGetLineInfo( (HMIXEROBJ)hMixer, &mxl,
MIXER_OBJECTF_HMIXER | MIXER_GETLINEINFOF_SOURCE );
// 判断函数执行错误
if( MMSYSERR_NOERROR==rc )
{
// 如果当前设备类型是麦克风，则跳出循环。
if( mxl.dwComponentType==MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE )
{
dwLineID = mxl.dwLineID;
break;
}
}
}
// 如果没有找到，返回失败。
if( dwLineID==-1 )
{
//尝试其他声卡
continue;
}
// MIXERCONTROL 结构体变量清零
ZeroMemory(&mxc, sizeof(MIXERCONTROL));
mxc.cbStruct = sizeof(mxc); // 微软用此办法判断版本
// MIXERLINECONTROLS 结构体变量清零
ZeroMemory(&mxlc, sizeof(MIXERLINECONTROLS));
mxlc.cbStruct = sizeof(mxlc); // 微软用此办法判断版本
mxlc.dwLineID = dwLineID; // 上面取得的声卡音频输入线路标识
// 控制类型为控制音量
mxlc.dwControlType = MIXERCONTROL_CONTROLTYPE_VOLUME;
mxlc.cControls = 1; // 使用 MIXERCONTROL 结构体变量个数
mxlc.pamxctrl = &mxc; // MIXERCONTROL 结构体变量指针
mxlc.cbmxctrl = sizeof(mxc); // MIXERCONTROL 结构体变量字节大小
// 取得控制器信息
rc = mixerGetLineControls((HMIXEROBJ)hMixer,
&mxlc,
MIXER_GETLINECONTROLSF_ONEBYTYPE);
// 取得控制器信息成功的话，则
if (MMSYSERR_NOERROR == rc)
{
// 获取控制器中的值的音量范围：mxc.Bounds.lMinimum到mxc.Bounds.lMaximum.
MIXERCONTROLDETAILS mxcd; // 控制器的状态信息
MIXERCONTROLDETAILS_SIGNED volStruct; // 音量结构体变量(就一个成员量)
// MIXERCONTROLDETAILS 结构体变量清零
ZeroMemory(&mxcd, sizeof(mxcd));
mxcd.cbStruct = sizeof(mxcd); // 微软用此办法判断版本
mxcd.dwControlID = mxc.dwControlID; // 上面取得的控制器标识
mxcd.paDetails = &volStruct; // 音量结构体变量指针
mxcd.cbDetails = sizeof(volStruct); // 音量结构体变量字节大小
mxcd.cChannels = 1; // 取得或设置全部通道
// 获取控制器中的值的音量范围：mxc.Bounds.lMinimum到mxc.Bounds.lMaximum.
// 获得音量值
rc = mixerGetControlDetails((HMIXEROBJ)hMixer,
&mxcd,
MIXER_GETCONTROLDETAILSF_VALUE);
if (MMSYSERR_NOERROR == rc)
{
long step = ( mxc.Bounds.lMaximum - mxc.Bounds.lMinimum ) /100;
int index = ( volStruct.lValue - mxc.Bounds.lMinimum) /step ;
printf("音量：%X", volStruct.lValue);
CString str;
str.Format("%d",volStruct.lValue);
m_s = str;
UpdateData(FALSE);
str = "";
return index;
}
}
}
return -1;
CMixer mix;
unsigned m;
/*m = mix.GetVolume();
CString str;
str.Format("%d",m);
m_s = str;
UpdateData(FALSE);
MessageBox(str);*/
}
不要做咸鱼 2014-06-04
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友情帮顶 额不会啊楼主
赵4老师 2014-06-04
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mixerGetControlDetails
The mixerGetControlDetails function retrieves details about a single control associated with an audio line.
MMRESULT mixerGetControlDetails(
HMIXEROBJ hmxobj,
LPMIXERCONTROLDETAILS pmxcd,
DWORD fdwDetails
);
Parameters
hmxobj
Handle of the mixer device object being queried.
pmxcd
Address of a MIXERCONTROLDETAILS structure, which is filled with state information about the control.
fdwDetails
Flags for retrieving control details. The following values are defined:
MIXER_GETCONTROLDETAILSF_LISTTEXT
The paDetails member of the MIXERCONTROLDETAILS structure points to one or more MIXERCONTROLDETAILS_LISTTEXT structures to receive text labels for multiple-item controls. An application must get all list text items for a multiple-item control at once. This flag cannot be used with MIXERCONTROL_CONTROLTYPE_CUSTOM controls.
MIXER_GETCONTROLDETAILSF_VALUE
Current values for a control are retrieved. The paDetails member of the MIXERCONTROLDETAILS structure points to one or more details structures appropriate for the control class.
MIXER_OBJECTF_AUX
The hmxobj parameter is an auxiliary device identifier in the range of zero to one less than the number of devices returned by the auxGetNumDevs function.
MIXER_OBJECTF_HMIDIIN
The hmxobj parameter is the handle of a MIDI (Musical Instrument Digital Interface) input device. This handle must have been returned by the midiInOpen function.
MIXER_OBJECTF_HMIDIOUT
The hmxobj parameter is the handle of a MIDI output device. This handle must have been returned by the midiOutOpen function.
MIXER_OBJECTF_HMIXER
The hmxobj parameter is a mixer device handle returned by the mixerOpen function. This flag is optional.
MIXER_OBJECTF_HWAVEIN
The hmxobj parameter is a waveform-audio input handle returned by the waveInOpen function.
MIXER_OBJECTF_HWAVEOUT
The hmxobj parameter is a waveform-audio output handle returned by the waveOutOpen function.
MIXER_OBJECTF_MIDIIN
The hmxobj parameter is the identifier of a MIDI input device. This identifier must be in the range of zero to one less than the number of devices returned by the midiInGetNumDevs function.
MIXER_OBJECTF_MIDIOUT
The hmxobj parameter is the identifier of a MIDI output device. This identifier must be in the range of zero to one less than the number of devices returned by the midiOutGetNumDevs function.
MIXER_OBJECTF_MIXER
The hmxobj parameter is the identifier of a mixer device in the range of zero to one less than the number of devices returned by the mixerGetNumDevs function. This flag is optional.
MIXER_OBJECTF_WAVEIN
The hmxobj parameter is the identifier of a waveform-audio input device in the range of zero to one less than the number of devices returned by the waveInGetNumDevs function.
MIXER_OBJECTF_WAVEOUT
The hmxobj parameter is the identifier of a waveform-audio output device in the range of zero to one less than the number of devices returned by the waveOutGetNumDevs function.
Return Values
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following:
Value Description
MIXERR_INVALCONTROL The control reference is invalid.
MMSYSERR_BADDEVICEID The hmxobj parameter specifies an invalid device identifier.
MMSYSERR_INVALFLAG One or more flags are invalid.
MMSYSERR_INVALHANDLE The hmxobj parameter specifies an invalid handle.
MMSYSERR_INVALPARAM One or more parameters are invalid.
MMSYSERR_NODRIVER No mixer device is available for the object specified by hmxobj.
Remarks
All members of the MIXERCONTROLDETAILS structure must be initialized before calling this function.
QuickInfo
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in mmsystem.h.
Import Library: Use winmm.lib.
Unicode: Implemented as Unicode and ANSI versions on Windows NT.
See Also
Audio Mixers Overview, Audio Mixer Functions, MIXERCONTROLDETAILS, MIXERCONTROLDETAILS_LISTTEXT, auxGetNumDevs, midiInOpen, midiOutOpen, mixerOpen, waveInOpen, waveOutOpen, midiInGetNumDevs, midiOutGetNumDevs, mixerGetNumDevs, waveInGetNumDevs, waveOutGetNumDevs
蠓虫带着秤砣飞 2014-06-04
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我学习到了。
SuperCoderJz 2014-06-04
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好吧 还是调不出来 我才上大二 你说的我也看不懂 全英文的
赵4老师 2014-06-04
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赵4老师 2014-06-04
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以下节选自MSDN98\SAMPLES\VC98\SDK\GRAPHICS\AUDIO\MIXAPP\MAMETER.C
，仅供参考：
//--------------------------------------------------------------------------;
//
// BOOL MixAppControlChangeMeter
//
// Description:
//
//
// Arguments:
// HWND hwnd:
//
// HMIXER hmx:
//
// DWORD dwControlID:
//
// Return (BOOL):
//
// History:
// 09/22/93
//
//--------------------------------------------------------------------------;
BOOL FNLOCAL MixAppControlChangeMeter
(
HWND hwnd,
HMIXER hmx,
DWORD dwControlID
)
{
MMRESULT mmr;
HWND htxt;
PMACONTROLINSTANCE_METER pmaci_meter;
LPMACONTROLINSTANCE pmaci;
LPMIXERLINE pmxl;
LPMIXERCONTROL pmxctrl;
PMIXERCONTROLDETAILS_SIGNED pmxcd_s;
UINT cChannels;
UINT cMultipleItems;
UINT u;
UINT uIndex;
UINT v;
MIXERCONTROLDETAILS mxcd;
HWND hsbFocus;
HWND hsb;
BOOL fSigned;
DWORD dwRange;
DWORD dwValue;
int nValue;
hsbFocus = GetFocus();
if (NULL == hsbFocus)
{
hsbFocus = GetDlgItem(hwnd, IDD_MACONTROL_MULTICHANNEL_BASE);
}
else
{
uIndex = GetDlgCtrlID(hsbFocus);
if (uIndex < IDD_MACONTROL_MULTICHANNEL_BASE)
{
hsbFocus = GetDlgItem(hwnd, IDD_MACONTROL_MULTICHANNEL_BASE);
}
}
//
//
//
pmaci_meter = (PMACONTROLINSTANCE_METER)(UINT)GetWindowLong(hwnd, DWL_USER);
pmaci = pmaci_meter->pmaci;
pmxl = pmaci->pmxl;
pmxctrl = pmaci->pmxctrl;
pmxcd_s = &pmaci_meter->pmxcd_s[0];
fSigned = pmaci_meter->fSigned;
dwRange = pmaci_meter->dwRange;
cChannels = (UINT)pmxl->cChannels;
if (MIXERCONTROL_CONTROLF_UNIFORM & pmxctrl->fdwControl)
cChannels = 1;
//
//
//
mxcd.cbStruct = sizeof(mxcd);
mxcd.dwControlID = pmxctrl->dwControlID;
mxcd.cChannels = cChannels;
mxcd.cMultipleItems = pmxctrl->cMultipleItems;
mxcd.cbDetails = sizeof(*pmxcd_s);
mxcd.paDetails = pmxcd_s;
mmr = mixerGetControlDetails((HMIXEROBJ)pmaci->hmx, &mxcd, MIXER_GETCONTROLDETAILSF_VALUE);
if (MMSYSERR_NOERROR != mmr)
{
AppMsgBox(hwnd, MB_OK | MB_ICONEXCLAMATION,
"mixerGetControlDetails(ctrlid=%.08lXh) failed on hmx=%.04Xh, mmr=%u!",
pmxctrl->dwControlID, pmaci->hmx, mmr);
return (FALSE);
}
cMultipleItems = 1;
if (MIXERCONTROL_CONTROLF_MULTIPLE & pmxctrl->fdwControl)
cMultipleItems = (UINT)pmxctrl->cMultipleItems;
for (u = 0; u < cChannels; u++)
{
for (v = 0; v < cMultipleItems; v++)
{
uIndex = (u * cMultipleItems) + v;
if (fSigned)
{
dwValue = (DWORD)(pmxcd_s[uIndex].lValue -
pmxctrl->Bounds.lMinimum);
}
else
{
dwValue = (DWORD)pmxcd_s[uIndex].lValue;
dwValue -= pmxctrl->Bounds.dwMinimum;
}
nValue = (int)MulDivRN(dwValue, 32767, dwRange);
//
// Windows is stupid and forces an update to scrollbars
// (a flickering paint) even when the position does not
// change... so don't update if it is already in the
// right position.
//
hsb = GetDlgItem(hwnd, IDD_MACONTROL_MULTICHANNEL_BASE + uIndex);
if (hsbFocus == hsb)
{
htxt = GetDlgItem(hwnd, IDD_MACONTROL_TXT_VALUE);
if (fSigned)
{
AppSetWindowText(htxt, "mapped=%d, lValue=%ld",
nValue,
pmxcd_s[uIndex].lValue);
}
else
{
AppSetWindowText(htxt, "mapped=%d, dwValue=%lu",
nValue,
pmxcd_s[uIndex].lValue);
}
}
if (32767 - nValue == GetScrollPos(hsb, SB_CTL))
continue;
//
// note that we _invert_ the position since a meter will
// increase approaching the top (opposite of scrollbar
// logic)
//
SetScrollPos(hsb, SB_CTL, 32767 - nValue, TRUE);
}
}
//
//
//
mxcd.cbStruct = sizeof(mxcd);
mxcd.dwControlID = pmxctrl->dwControlID;
mxcd.cChannels = 1;
mxcd.cMultipleItems = pmxctrl->cMultipleItems;
mxcd.cbDetails = sizeof(*pmxcd_s);
mxcd.paDetails = pmxcd_s;
mmr = mixerGetControlDetails((HMIXEROBJ)pmaci->hmx, &mxcd, MIXER_GETCONTROLDETAILSF_VALUE);
if (MMSYSERR_NOERROR != mmr)
{
AppMsgBox(hwnd, MB_OK | MB_ICONEXCLAMATION,
"mixerGetControlDetails(ctrlid=%.08lXh) failed on hmx=%.04Xh, mmr=%u!",
pmxctrl->dwControlID, pmaci->hmx, mmr);
return (FALSE);
}
for (v = 0; v < cMultipleItems; v++)
{
uIndex = v;
if (fSigned)
{
dwValue = (DWORD)(pmxcd_s[uIndex].lValue -
pmxctrl->Bounds.lMinimum);
}
else
{
dwValue = (DWORD)pmxcd_s[uIndex].lValue;
dwValue -= pmxctrl->Bounds.dwMinimum;
}
nValue = (int)MulDivRN(dwValue, 32767, dwRange);
hsb = GetDlgItem(hwnd, IDD_MACONTROL_UNIFORM_BASE + uIndex);
if (hsbFocus == hsb)
{
htxt = GetDlgItem(hwnd, IDD_MACONTROL_TXT_VALUE);
if (fSigned)
{
AppSetWindowText(htxt, "mapped=%d, lValue=%ld",
nValue,
pmxcd_s[uIndex].lValue);
}
else
{
AppSetWindowText(htxt, "mapped=%d, dwValue=%lu",
nValue,
pmxcd_s[uIndex].lValue);
}
}
if (32767 - nValue == GetScrollPos(hsb, SB_CTL))
continue;
//
// note that we _invert_ the position since a meter will
// increase approaching the top (opposite of scrollbar
// logic)
//
SetScrollPos(hsb, SB_CTL, 32767 - nValue, TRUE);
}
return (TRUE);
} // MixAppControlChangeMeter()
SuperCoderJz 2014-06-04
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关键是我看的代码没错啊 可还是获取不到 不知道为什么 一直都是65532
赵4老师 2014-06-04
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参考MSDN98\SAMPLES\VC98\SDK\GRAPHICS\AUDIO\MIXAPP\*.* ？
在Google上搜“mixerGetControlDetails” ？
蠓虫带着秤砣飞 2014-06-03
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这个要用到DS编程。
