请问mixerGetNumDevs和相关的API有帮助吗? (你必须要经过的所有设备与mixerGetLineControls
等,看看哪些MIXERCONTROL
说:“卷”为姓;还有一种方法可以检查该标志这就是你要找的人。)
编辑:
这是我有一些旧代码的片段;我不认为它编译,它不是伟大的代码(我只需要完成的东西),但它应该是有帮助的:
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)
{
}
}
}
}
}
}
我不知道它是否有效(好吧,我是新手到这个论点),它也可以在vista/seven上运行吗? – 2011-01-07 21:31:48