调节系统音量问题??急~~~~~~~ 本人要做一个调节系统音量的程序,用来调节控制面板中扬声器的音量大小而不是调节波形的大小,有哪位高手可提供下资料?在VC 中可调用哪个函数????谢谢!!!!!!! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 // 调节系统音量//--------------------------------------------------------------------------// 文件: VloControl.cpp (seeker modify 2006.08.10)// 函数: SetVolume(int AudioIndex,long NewPos);// 参数: AudioIndex 是音频设备的序列,默认的设备就是0// 参数: NewPos: 音量大小,1--100之间//---------------------------------------------------------------------------#include <mmsystem.h>bool GetVolumeControl(HMIXER hmixer ,long componentType,long ctrlType,MIXERCONTROL* mxc){MIXERLINECONTROLS mxlc;MIXERLINE mxl;mxl.cbStruct = sizeof(mxl);mxl.dwComponentType = componentType;if(!mixerGetLineInfo((HMIXEROBJ)hmixer, &mxl, MIXER_GETLINEINFOF_COMPONENTTYPE)){mxlc.cbStruct = sizeof(mxlc);mxlc.dwLineID = mxl.dwLineID;mxlc.dwControlType = ctrlType;mxlc.cControls = 1;mxlc.cbmxctrl = sizeof(MIXERCONTROL);mxlc.pamxctrl = mxc;if(mixerGetLineControls((HMIXEROBJ)hmixer,&mxlc,MIXER_GETLINECONTROLSF_ONEBYTYPE))return 0;elsereturn 1;}return 0;}//---------------------------------------------------------------------------unsigned GetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc){MIXERCONTROLDETAILS mxcd;MIXERCONTROLDETAILS_UNSIGNED vol; vol.dwValue=0;mxcd.hwndOwner = 0;mxcd.cbStruct = sizeof(mxcd);mxcd.dwControlID = mxc->dwControlID;mxcd.cbDetails = sizeof(vol);mxcd.paDetails = &vol;mxcd.cChannels = 1;if(mixerGetControlDetails((HMIXEROBJ)hmixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_GETCONTROLDETAILSF_VALUE))return -1;return vol.dwValue;}//---------------------------------------------------------------------------bool SetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc, long volume){MIXERCONTROLDETAILS mxcd;MIXERCONTROLDETAILS_UNSIGNED vol;vol.dwValue = volume;mxcd.hwndOwner = 0;mxcd.dwControlID = mxc->dwControlID;mxcd.cbStruct = sizeof(mxcd);mxcd.cbDetails = sizeof(vol);mxcd.paDetails = &vol;mxcd.cChannels = 1;if(mixerSetControlDetails((HMIXEROBJ)hmixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_SETCONTROLDETAILSF_VALUE))return 0;return 1;}//---------------------------------------------------------------------------unsigned WINAPI GetVolume(int dev)//得到设备的音量dev=0主音量,1WAVE ,2MIDI ,3 LINE IN{long device;unsigned rt=0;MIXERCONTROL volCtrl;HMIXER hmixer;switch (dev){case 1:device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;case 2:device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;case 3:// device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break; // cd 音量 device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麦克风音量// device=MIXERLINE_COMPONENTTYPE_SRC_LINE; break; //PC 扬声器音量//device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break;default:device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;}if(mixerOpen(&hmixer, 0, 0, 0, 0)) return 0;if(!GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_VOLUME,&volCtrl))return 0;rt=GetVolumeValue(hmixer,&volCtrl)*100/volCtrl.Bounds.lMaximum;mixerClose(hmixer);return rt;}//---------------------------------------------------------------------------bool WINAPI SetVolume(long dev,long vol)//设置设备的音量{// dev =0,1,2 分别表示主音量,波形,MIDI ,LINE IN// vol=0-100 表示音量的大小 , 设置与返回音量的值用的是百分比,即音量从0 - 100,而不是设备的绝对值// retrun false 表示设置音量的大小的操作不成功// retrun true 表示设置音量的大小的操作成功long device;bool rc=false;MIXERCONTROL volCtrl;HMIXER hmixer;switch (dev){case 1:device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;case 2:device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;case 3: device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麦克风音量default:device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;}if(mixerOpen(&hmixer, 0, 0, 0, 0)) return 0;if(GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_VOLUME,&volCtrl)){vol=vol*volCtrl.Bounds.lMaximum/100;if(SetVolumeValue(hmixer,&volCtrl,vol))rc=true;}mixerClose(hmixer);return rc;} 顶一个==========================unsigned WINAPI GetVolume(int dev)//得到设备的音量dev=0主音量,1WAVE ,2MIDI ,3 LINE IN------------------bool WINAPI SetVolume(long dev,long vol)//设置设备的音量{// dev =0,1,2 分别表示主音量,波形,MIDI ,LINE IN// vol=0-100 表示音量的大小 , 设置与返回音量的值用的是百分比,即音量从0 - 100,而不是设备的绝对值==================================上面代码中的,先得到当前音量,再加减! variant_t和VARIANT??? 我想学mfc编程,请问从哪里下载实例教程,最好从最基本的例子开始的。谢谢 如何改变AfxMessageBox上按钮的文本 想同各位探讨一个问题,关于数据库开发 请lop5712(LOP)领分 SETWINDOWTEXT小问题 年底被公司裁员了,散分…… 关于用udp实现大于两方的多人通讯的方法, 高手请进 绘制phototshop里的蚂蚁线??? 关于2003与XP系统 关于窗体重画问题 怎么用画刷填充封闭区域?
// 文件: VloControl.cpp (seeker modify 2006.08.10)
// 函数: SetVolume(int AudioIndex,long NewPos);
// 参数: AudioIndex 是音频设备的序列,默认的设备就是0
// 参数: NewPos: 音量大小,1--100之间
//---------------------------------------------------------------------------
#include <mmsystem.h>bool GetVolumeControl(HMIXER hmixer ,long componentType,long ctrlType,MIXERCONTROL* mxc)
{
MIXERLINECONTROLS mxlc;
MIXERLINE mxl;
mxl.cbStruct = sizeof(mxl);
mxl.dwComponentType = componentType;
if(!mixerGetLineInfo((HMIXEROBJ)hmixer, &mxl, MIXER_GETLINEINFOF_COMPONENTTYPE))
{
mxlc.cbStruct = sizeof(mxlc);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControlType = ctrlType;
mxlc.cControls = 1;
mxlc.cbmxctrl = sizeof(MIXERCONTROL);
mxlc.pamxctrl = mxc;
if(mixerGetLineControls((HMIXEROBJ)hmixer,&mxlc,MIXER_GETLINECONTROLSF_ONEBYTYPE))
return 0;
else
return 1;
}
return 0;
}//---------------------------------------------------------------------------
unsigned GetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc)
{
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_UNSIGNED vol; vol.dwValue=0;
mxcd.hwndOwner = 0;
mxcd.cbStruct = sizeof(mxcd);
mxcd.dwControlID = mxc->dwControlID;
mxcd.cbDetails = sizeof(vol);
mxcd.paDetails = &vol;
mxcd.cChannels = 1;
if(mixerGetControlDetails((HMIXEROBJ)hmixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_GETCONTROLDETAILSF_VALUE))
return -1;
return vol.dwValue;
}//---------------------------------------------------------------------------bool SetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc, long volume)
{
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_UNSIGNED vol;vol.dwValue = volume;
mxcd.hwndOwner = 0;
mxcd.dwControlID = mxc->dwControlID;
mxcd.cbStruct = sizeof(mxcd);
mxcd.cbDetails = sizeof(vol);
mxcd.paDetails = &vol;
mxcd.cChannels = 1;
if(mixerSetControlDetails((HMIXEROBJ)hmixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_SETCONTROLDETAILSF_VALUE))
return 0;
return 1;
}
//---------------------------------------------------------------------------
unsigned WINAPI GetVolume(int dev)//得到设备的音量dev=0主音量,1WAVE ,2MIDI ,3 LINE IN
{long device;unsigned rt=0;
MIXERCONTROL volCtrl;
HMIXER hmixer;
switch (dev)
{
case 1:
device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;
case 2:
device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;
case 3:
// device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break; // cd 音量
device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麦克风音量
// device=MIXERLINE_COMPONENTTYPE_SRC_LINE; break; //PC 扬声器音量
//device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break;default:
device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
}if(mixerOpen(&hmixer, 0, 0, 0, 0)) return 0;
if(!GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_VOLUME,&volCtrl))
return 0;
rt=GetVolumeValue(hmixer,&volCtrl)*100/volCtrl.Bounds.lMaximum;
mixerClose(hmixer);
return rt;}//---------------------------------------------------------------------------bool WINAPI SetVolume(long dev,long vol)//设置设备的音量
{
// dev =0,1,2 分别表示主音量,波形,MIDI ,LINE IN
// vol=0-100 表示音量的大小 , 设置与返回音量的值用的是百分比,即音量从0 - 100,而不是设备的绝对值
// retrun false 表示设置音量的大小的操作不成功
// retrun true 表示设置音量的大小的操作成功long device;
bool rc=false;
MIXERCONTROL volCtrl;
HMIXER hmixer;
switch (dev)
{
case 1:
device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;
case 2:
device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;
case 3:
device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麦克风音量default:
device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
}if(mixerOpen(&hmixer, 0, 0, 0, 0)) return 0;if(GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_VOLUME,&volCtrl))
{
vol=vol*volCtrl.Bounds.lMaximum/100;
if(SetVolumeValue(hmixer,&volCtrl,vol))
rc=true;
}
mixerClose(hmixer);
return rc;
}
==========================
unsigned WINAPI GetVolume(int dev)//得到设备的音量dev=0主音量,1WAVE ,2MIDI ,3 LINE IN------------------
bool WINAPI SetVolume(long dev,long vol)//设置设备的音量
{
// dev =0,1,2 分别表示主音量,波形,MIDI ,LINE IN
// vol=0-100 表示音量的大小 , 设置与返回音量的值用的是百分比,即音量从0 - 100,而不是设备的绝对值
==================================
上面代码中的,先得到当前音量,再加减!