获得与调节已知设备的音量

最新推荐文章于 2019-12-16 13:36:13 发布

threewells_14

最新推荐文章于 2019-12-16 13:36:13 发布

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分类专栏： directshow/window media编程文章标签： winapi dst

本文链接：https://blog.youkuaiyun.com/threewells_14/article/details/1434018

这段代码提供了获取和设置Windows系统中不同设备音量和静音状态的功能。通过HMIXER句柄，实现了MMSYSTEM库中的mixerGetLineInfo, mixerGetLineControls, mixerGetControlDetails和mixerSetControlDetails等函数，来操控音频设备的音量控制和静音设置。" 112400988,10540965,DELMIA教程：机器人焊点坐标数据导出与准确性,"['工业机器人', '仿真软件', 'DELMIA教程', '焊接工艺', '数据导出']

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#ifndef SoundControlH
#define SoundControlH
//---------------------------------------------------------------------------
#include <Classes.hpp>
#include <mmsystem.h>
#include <mmreg.h>

bool GetVolumeControl(HMIXER hmixer ,long componentType,long ctrlType,MIXERCONTROL* mxc);

long GetMuteValue(HMIXER hmixer ,MIXERCONTROL *mxc) ;
unsigned GetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc);
bool SetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc, long volume);
bool SetMuteValue(HMIXER hmixer ,MIXERCONTROL *mxc, bool mute);

//下面四个是输出函数，可以自己调用
bool WINAPI SetVolume(long dev,long vol);//设置设备的音量
unsigned WINAPI GetVolume(int dev);//得到设备的音量dev=0主音量，1WAVE ,2MIDI ,3 LINE IN

bool WINAPI SetMute(long dev,bool vol);//设置设备静音
bool WINAPI GetMute(long dev);
#endif

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;
}
//---------------------------------------------