[英]GET Master volume in Windows XP/Vista/Seven (the one increased through keyboard wheel normally)
我知道很多人都问过这个问题,但是我没有读任何答案,是否有任何lib /通用方法来获取(未设置,我不需要)主卷(当前输出源的卷)声音,而不是声音)对xp / vista / seven都适用?
如果没有,如何针对xp,vista,7(我将编写通用包装器)进行处理
我需要显示一个进度条(进度条)以显示如何设置当前音量(winform控件)
编辑:
我找到了一个有用的链接,正在测试中,但是我不会检查答案,直到我得到可以使用的东西为止http://www.codeproject.com/KB/audio-video/mixerSetControlDetails.aspx?display=Print
编辑2:
重要的是:以前的分析音量的方法在Windows Vista或更高版本上不起作用,请改用此lib: http : //www.codeproject.com/KB/vista/CoreAudio.aspx
我不知道是否真的行得通,因为我目前没有远景/七
mixerGetNumDevs和相关的API有帮助吗? (您必须使用mixerGetLineControls
等遍历所有设备,并查看哪个MIXERCONTROL
为名称说“ Volume”;还有一种方法可以检查标志。这就是您要查找的标志。)
编辑:
这是我的一些旧代码的片段; 我不认为它可以编译,也不是很好的代码(我只需要完成工作即可),但这应该会有所帮助:
MMRESULT mmResult = mixerOpen(&hMixer, 0, (DWORD_PTR)hWnd, NULL, CALLBACK_WINDOW | MIXER_OBJECTF_MIXER);
if (MMSYSERR_NOERROR == mmResult)
{
MIXERLINE mxl;
mxl.cbStruct = sizeof(MIXERLINE);
mxl.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
MMRESULT mmResult = mixerGetLineInfo((HMIXEROBJ)hMixer, &mxl, MIXER_OBJECTF_HMIXER | MIXER_GETLINEINFOF_COMPONENTTYPE);
if (mmResult == MMSYSERR_NOERROR)
{
MIXERLINECONTROLS controls;
memzero(&controls, sizeof(controls));
controls.cbStruct = sizeof(controls);
controls.cControls = 1;
controls.dwLineID = mxl.dwLineID;
controls.cbmxctrl = sizeof(MIXERCONTROL); //one element only!!
MIXERCONTROL controlsArray[2]; //First element: volume, second element: mixer
memzero(&controlsArray, sizeof(controlsArray));
for (int i = 0; i < sizeof(controlsArray) / sizeof(*controlsArray); i++) { controlsArray[0].cbStruct = sizeof(controlsArray[0]); }
controls.dwControlType = MIXERCONTROL_CONTROLTYPE_VOLUME;
controls.pamxctrl = &controlsArray[0]; //NOTE: this is ZERO
mmResult = mixerGetLineControls((HMIXEROBJ)hMixer, &controls, MIXER_GETLINECONTROLSF_ONEBYTYPE | MIXER_OBJECTF_HMIXER);
if (mmResult == MMSYSERR_NOERROR)
{
controls.dwControlType = MIXERCONTROL_CONTROLTYPE_MUTE;
controls.pamxctrl = &controlsArray[1]; //NOTE: this is ONE
mmResult = mixerGetLineControls((HMIXEROBJ)hMixer, &controls, MIXER_GETLINECONTROLSF_ONEBYTYPE | MIXER_OBJECTF_HMIXER);
if (mmResult == MMSYSERR_NOERROR)
{
bool isVolume = controls[0].dwControlID == (DWORD)lParam;
bool isMute = controls[1].dwControlID == (DWORD)lParam;
if (isVolume | isMute)
{
MIXERCONTROLDETAILS details;
memzero(&details, sizeof(details));
details.cbStruct = sizeof(details);
details.cChannels = 1;
details.dwControlID = (DWORD)lParam;
MIXERCONTROLDETAILS_UNSIGNED controlDetail;
memzero(&controlDetail, sizeof(controlDetail));
details.paDetails = &controlDetail;
details.cbDetails = sizeof(controlDetail);
MMRESULT mmResult = mixerGetControlDetails((HMIXEROBJ)hMixer, &details, MIXER_GETCONTROLDETAILSF_VALUE | MIXER_OBJECTF_HMIXER);
if (mmResult == MMSYSERR_NOERROR)
{
}
}
}
}
}
}
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