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Another multimedia question

Hi,

Please tell me, how can I using API functions (mixerXXX) set selection(wave input) to microphone? (Volume control->options->properties->recording)

PS: I'm using VC60 (OS Win9x/NT/2k)

Thanks,
mahno

ASKER CERTIFIED SOLUTION

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mahno

ASKER

Hi yz,

Something wrong in:

MixerControlDetails.cbStruct = sizeof(MixerControlDetails);
MixerControlDetails.dwControlID = MixerControl.dwControlID;
MixerControlDetails.cChannels = MixerLine.cChannels;
MixerControlDetails.cMultipleItems = MixerControl.cMultipleItems;
MixerControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_LISTTEXT);
MixerControlDetails.paDetails = pMixerControlDetails_Listtext;

mmr = mixerGetControlDetails((HMIXEROBJ)hMixer, &MixerControlDetails,
MIXER_GETCONTROLDETAILSF_LISTTEXT);

mmr is equal to MMSYSERR_INVALPARAM

May be the reason is dwControlID (It's equal to 0)

Regards,
mahno

mahno

ASKER

Ur code doesn't work corretly, but I find way how to solve my problem. Ur code helps me. That is why I can't give grade "A".

Thanks,
mahno

I don't know why, these code runs ok in my computer, and the dwControlID of MixerLine is acturally zero, and the
mixerGetControlDetails returns S_OK, what happens in ur computer? could you tell me more? and how you solve it?

mahno

ASKER

As I said on my computer mmr is equal to MMSYSERR_INVALPARAM.

>and how you solve it?
see bellow:
{
HMIXER hMixer;
MIXERLINE MixerLine;
MIXERLINECONTROLS MixerLineControls;
PMIXERCONTROL paMixerControls;
MIXERCONTROLDETAILS MixerControlDetails;
PMIXERCONTROLDETAILS_BOOLEAN pMixerControlDetails_Boolean;
PMIXERCONTROLDETAILS_LISTTEXT pMixerControlDetails_Listtext;
MIXERCAPS MixerCaps;
MMRESULT mmr;

UINT u,v;
BOOL bFindDst = FALSE;
BOOL bFindCtrl = FALSE;

// Check if mixer exists
if(mixerGetNumDevs() < 1) {
return FALSE;
}

mmr = mixerOpen(&hMixer, 0, 0, 0L, MIXER_OBJECTF_MIXER);
if (mmr != MMSYSERR_NOERROR) {
return FALSE;
}

mmr = mixerGetDevCaps((UINT)hMixer, &MixerCaps, sizeof(MixerCaps));
if (mmr != MMSYSERR_NOERROR) {
mixerClose(hMixer);
return FALSE;
}

for (u = 0; u < MixerCaps.cDestinations; u++) {
MixerLine.cbStruct = sizeof(MixerLine);
MixerLine.dwDestination = u;
MixerLine.dwSource = 0;

// Get information on this line
mmr = mixerGetLineInfo((HMIXEROBJ)hMixer, &MixerLine, MIXER_GETLINEINFOF_DESTINATION);
if (mmr != MMSYSERR_NOERROR) {
mixerClose(hMixer);
return FALSE;
}

if (MixerLine.dwComponentType == MIXERLINE_COMPONENTTYPE_DST_WAVEIN) { //(MixerLine.dwComponentType == MIXERLINE_COMPONENTTYPE_DST_VOICEIN)
bFindDst = TRUE;
break;
}
}

if (!bFindDst) {
mixerClose(hMixer);
return FALSE;
}

paMixerControls = new MIXERCONTROL[MixerLine.cControls];

MixerLineControls.cbStruct = sizeof(MIXERLINECONTROLS);
MixerLineControls.dwLineID = MixerLine.dwLineID;
MixerLineControls.cControls = MixerLine.cControls;
MixerLineControls.cbmxctrl = sizeof(MIXERCONTROL);
MixerLineControls.pamxctrl = paMixerControls;

// Get the controls for the current destination mixer line
mmr = mixerGetLineControls((HMIXEROBJ)hMixer, &MixerLineControls, MIXER_GETLINECONTROLSF_ALL);
if (mmr != MMSYSERR_NOERROR) {
delete paMixerControls;
mixerClose(hMixer);
return FALSE;
}

for (u = 0; u < MixerLine.cControls; u++) {
if ((paMixerControls[u].dwControlType == MIXERCONTROL_CONTROLTYPE_MUX) ||
(paMixerControls[u].dwControlType == MIXERCONTROL_CONTROLTYPE_MIXER)) {
bFindCtrl = TRUE;
break;
}
}

if (!bFindCtrl) {
delete paMixerControls;
mixerClose(hMixer);
return FALSE;
}

pMixerControlDetails_Listtext = new MIXERCONTROLDETAILS_LISTTEXT[MixerLine.cChannels * paMixerControls[u].cMultipleItems];

MixerControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
MixerControlDetails.dwControlID = paMixerControls[u].dwControlID;
MixerControlDetails.cChannels = 1;//MixerLine.cChannels;
MixerControlDetails.hwndOwner = (HWND)paMixerControls[u].cMultipleItems;
MixerControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_LISTTEXT);
MixerControlDetails.paDetails = pMixerControlDetails_Listtext;

mmr = mixerGetControlDetails((HMIXEROBJ)hMixer, &MixerControlDetails, MIXER_GETCONTROLDETAILSF_LISTTEXT);
if (mmr != MMSYSERR_NOERROR) {
delete paMixerControls;
delete pMixerControlDetails_Listtext;
mixerClose(hMixer);
return FALSE;
}

pMixerControlDetails_Boolean = new MIXERCONTROLDETAILS_BOOLEAN[MixerLine.cChannels * paMixerControls[u].cMultipleItems];

MixerControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
MixerControlDetails.dwControlID = paMixerControls[u].dwControlID;
MixerControlDetails.cChannels = 1;//MixerLine.cChannels;
MixerControlDetails.hwndOwner = (HWND)paMixerControls[u].cMultipleItems;
MixerControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
MixerControlDetails.paDetails = pMixerControlDetails_Boolean;

mmr = mixerGetControlDetails((HMIXEROBJ)hMixer, &MixerControlDetails, MIXER_GETCONTROLDETAILSF_VALUE);
if (mmr != MMSYSERR_NOERROR) {
delete paMixerControls;
delete pMixerControlDetails_Listtext;
delete pMixerControlDetails_Boolean;
mixerClose(hMixer);
return FALSE;
}

//Set only the microphone or line as input sources
for(v = 0; v < paMixerControls[u].cMultipleItems; v++) {
pMixerControlDetails_Boolean[v].fValue = FALSE;
if (pMixerControlDetails_Listtext[v].dwParam2 == MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE)
pMixerControlDetails_Boolean[v].fValue = TRUE;
}

mmr = mixerSetControlDetails((HMIXEROBJ)hMixer, &MixerControlDetails, MIXER_SETCONTROLDETAILSF_VALUE);
if (mmr != MMSYSERR_NOERROR) {
delete paMixerControls;
delete pMixerControlDetails_Listtext;
delete pMixerControlDetails_Boolean;
mixerClose(hMixer);
return FALSE;
}

delete paMixerControls;
delete pMixerControlDetails_Listtext;
delete pMixerControlDetails_Boolean;
mixerClose(hMixer);
return TRUE;
}

Regards,
mahno