void SetVolume(uint value)
{
MIXERCONTROLDETAILS volCtl = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED volDat = new MIXERCONTROLDETAILS_UNSIGNED();
double volValue = (double)value * (double)(_volMax - _volMin) / 100D + _volMin;
volDat.Value = (uint)volValue;
Debug.WriteLine(string.Format("MixerAPI.SetCurrentVolume vol:{0} volMax:{1} volMin:{2} param:{3}",
value, _volMax, _volMin, volDat.Value));
IntPtr volPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(new MIXERCONTROLDETAILS_UNSIGNED()));
Marshal.StructureToPtr(volDat, volPtr, false);
volCtl.StructSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS());
volCtl.ControlID = _volumeID;
volCtl.Channels = 1;
volCtl.MultipleItems = 0;
volCtl.DetailsItemSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS_UNSIGNED());
volCtl.DetailsPointer = volPtr;
uint mmresult = mixerSetControlDetails(_hMixer, ref volCtl,
MIXER_OBJECTF.HMIXER, MIXER_GETCONTROLDETAILSF.VALUE);
Marshal.FreeCoTaskMem(volPtr);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
throw new MixerException("mixerSetControlDetails", mmresult);
}
}
private MMSYSERR SetVolume(IntPtr hmixer, MIXERCONTROL mxc, uint volume)
{
IntPtr hmem = IntPtr.Zero;
MMSYSERR err = MMSYSERR.NOERROR;
MIXERCONTROLDETAILS mxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED vol = new MIXERCONTROLDETAILS_UNSIGNED();
try
{
mxcd.hwndOwner = IntPtr.Zero;
mxcd.dwControlID = mxc.dwControlID;
mxcd.cbStruct = (uint)Marshal.SizeOf(mxcd);
mxcd.cbDetails = (uint)Marshal.SizeOf(vol);
mxcd.cChannels = 1;
vol.value = volume;
hmem = malloc(Marshal.SizeOf(vol));
mxcd.paDetails = hmem;
Marshal.StructureToPtr(vol, mxcd.paDetails, true);
err = mixerSetControlDetails(hmixer, ref mxcd, 0x0);
if (hmem != IntPtr.Zero)
{
free(hmem, Marshal.SizeOf(vol));
}
return(err);
}
catch { return(err); }
}
uint GetCurrentVolume()
{
MIXERCONTROLDETAILS volCtl = new MIXERCONTROLDETAILS();
IntPtr volPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(new MIXERCONTROLDETAILS_UNSIGNED()));
volCtl.StructSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS());
volCtl.ControlID = _volumeID;
volCtl.Channels = 1;
volCtl.MultipleItems = 0;
volCtl.DetailsItemSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS_UNSIGNED());
volCtl.DetailsPointer = volPtr;
uint mmresult = mixerGetControlDetails(_hMixer, ref volCtl,
MIXER_OBJECTF.HMIXER, MIXER_GETCONTROLDETAILSF.VALUE);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
Marshal.FreeCoTaskMem(volPtr);
throw new MixerException("mixerGetControlDetails", mmresult);
}
MIXERCONTROLDETAILS_UNSIGNED volInfo
= (MIXERCONTROLDETAILS_UNSIGNED)Marshal.PtrToStructure(volPtr,
typeof(MIXERCONTROLDETAILS_UNSIGNED));
Marshal.FreeCoTaskMem(volPtr);
double ret = ((double)(volInfo.Value - _volMin) * 100 + (double)(_volMax - _volMin) / 2)
/ (double)(_volMax - _volMin);
Debug.WriteLine(string.Format("MixerAPI.GetCurrentVolume vol:{0} volMax:{1} volMin:{2} ret:{3}",
volInfo.Value, _volMax, _volMin, ret));
return((uint)ret);
}
private static void SetVolumeControl(int hmixer, MIXERCONTROL mxc,
int volume)
{
// This function sets the value for a volume control.
// Returns True if successful
MIXERCONTROLDETAILS mxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED vol = new
MIXERCONTROLDETAILS_UNSIGNED();
mxcd.item = 0;
mxcd.dwControlID = mxc.dwControlID;
mxcd.cbStruct = Marshal.SizeOf(mxcd);
mxcd.cbDetails = Marshal.SizeOf(vol);
// Allocate a buffer for the control value buffer
mxcd.cChannels = 1;
vol.dwValue = volume;
// Copy the data into the control value buffer
//mxcd.paDetails = vol;
//(MIXERCONTROL)Marshal.PtrToStructure(mxlc.pamxctrl,typeof(MIXERCONTROL));
mxcd.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_UNSIGNED)));
Marshal.StructureToPtr(vol, mxcd.paDetails, false);
// Set the control value
try
{
CheckErr(mixerSetControlDetails(hmixer, ref mxcd,
MIXER_SETCONTROLDETAILSF_VALUE));
}
catch (Exception e)
{
throw e;
}
finally
{
Marshal.FreeCoTaskMem(mxcd.paDetails);
}
}
private static bool SetVolumeControl(int hmixer, MIXERCONTROL mxc,
int volume)
{
// This function sets the value for a volume control.
// Returns True if successful
bool retValue;
int rc;
MIXERCONTROLDETAILS mxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED vol = new
MIXERCONTROLDETAILS_UNSIGNED();
mxcd.item = 0;
mxcd.dwControlID = mxc.dwControlID;
mxcd.cbStruct = Marshal.SizeOf(mxcd);
mxcd.cbDetails = Marshal.SizeOf(vol);
// Allocate a buffer for the control value buffer
mxcd.cChannels = 1;
vol.dwValue = volume;
// Copy the data into the control value buffer
mxcd.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(
typeof(MIXERCONTROLDETAILS_UNSIGNED)));
Marshal.StructureToPtr(vol, mxcd.paDetails, false);
// Set the control value
rc = mixerSetControlDetails(hmixer, ref mxcd,
MIXER_SETCONTROLDETAILSF_VALUE);
if (MMSYSERR_NOERROR == rc)
{
retValue = true;
}
else
{
retValue = false;
} return(retValue);
}
private bool SetVolumeControl( // SetVolumeControl
int hmixer,
MIXERCONTROL mxc,
int volume)
{
bool retValue = false;
int rc;
MIXERCONTROLDETAILS mxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED vol = new MIXERCONTROLDETAILS_UNSIGNED();
mxcd.item = 0;
mxcd.dwControlID = mxc.dwControlID;
mxcd.cbStruct = Marshal.SizeOf(mxcd);
mxcd.cbDetails = Marshal.SizeOf(vol);
// Allocate a buffer for the control value buffer
mxcd.cChannels = 1;
vol.dwValue = volume;
// Copy the data into the control value buffer
mxcd.paDetails = Marshal.AllocCoTaskMem(
Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_UNSIGNED)));
Marshal.StructureToPtr(
vol,
mxcd.paDetails,
false);
// Set the control value
rc = mixerSetControlDetails(
hmixer,
ref mxcd,
MIXER_SETCONTROLDETAILSF_VALUE);
return(retValue = MMSYSERR_NOERROR == rc ? true : false);
}
private static void GetVolumeControl(int hmixer, int componentType,
int ctrlType, out MIXERCONTROL mxc, out int vCurrentVol)
{
// This function attempts to obtain a mixer control.
// Returns True if successful.
MIXERLINECONTROLS mxlc = new MIXERLINECONTROLS();
MIXERLINE mxl = new MIXERLINE();
MIXERCONTROLDETAILS pmxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED du = new
MIXERCONTROLDETAILS_UNSIGNED();
mxc = new MIXERCONTROL();
vCurrentVol = -1;
//mxl.szShortName = new string(' ', MIXER_SHORT_NAME_CHARS);
//mxl.szName = new string(' ', MIXER_LONG_NAME_CHARS);
mxl.cbStruct = Marshal.SizeOf(mxl);
mxl.dwComponentType = componentType;
// Obtain a line corresponding to the component public enum
CheckErr(mixerGetLineInfoA(hmixer, ref mxl,
MIXER_GETLINEINFOF_COMPONENTTYPE));
int sizeofMIXERCONTROL = 152;
//Marshal.SizeOf(typeof(MIXERCONTROL))
int ctrl = Marshal.SizeOf(typeof(MIXERCONTROL));
mxlc.pamxctrl = Marshal.AllocCoTaskMem(sizeofMIXERCONTROL); //new MIXERCONTROL();
mxlc.cbStruct = Marshal.SizeOf(mxlc);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControl = ctrlType;
mxlc.cControls = 1;
mxlc.cbmxctrl = sizeofMIXERCONTROL;
// Allocate a buffer for the control
mxc.cbStruct = sizeofMIXERCONTROL;
// Get the control
try
{
CheckErr(mixerGetLineControlsA(hmixer, ref mxlc,
MIXER_GETLINECONTROLSF_ONEBYTYPE));
// Copy the control into the destination structure
mxc = (MIXERCONTROL)Marshal.PtrToStructure(mxlc.pamxctrl, typeof(MIXERCONTROL));
}
catch (Exception e)
{
throw e;
}
finally
{
Marshal.FreeCoTaskMem(mxlc.pamxctrl);
}
int sizeofMIXERCONTROLDETAILS =
Marshal.SizeOf(typeof(MIXERCONTROLDETAILS));
int sizeofMIXERCONTROLDETAILS_UNSIGNED =
Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_UNSIGNED));
pmxcd.cbStruct = sizeofMIXERCONTROLDETAILS;
pmxcd.dwControlID = mxc.dwControlID;
pmxcd.paDetails =
Marshal.AllocCoTaskMem(sizeofMIXERCONTROLDETAILS_UNSIGNED);
pmxcd.cChannels = 1;
pmxcd.item = 0;
pmxcd.cbDetails = sizeofMIXERCONTROLDETAILS_UNSIGNED;
try
{
CheckErr(mixerGetControlDetailsA(hmixer, ref pmxcd,
MIXER_GETCONTROLDETAILSF_VALUE));
du =
(MIXERCONTROLDETAILS_UNSIGNED)Marshal.PtrToStructure(pmxcd.paDetails, typeof(MIXERCONTROLDETAILS_UNSIGNED));
}
catch (Exception e)
{
throw e;
}
finally
{
Marshal.FreeCoTaskMem(pmxcd.paDetails);
}
vCurrentVol = du.dwValue;
}
public static void RestoreState()
{
int index = 0;
uint[] ctrl_list =
{
MIXERCONTROL_CONTROLTYPE_CUSTOM,
MIXERCONTROL_CONTROLTYPE_BOOLEANMETER,
MIXERCONTROL_CONTROLTYPE_SIGNEDMETER,
MIXERCONTROL_CONTROLTYPE_PEAKMETER,
MIXERCONTROL_CONTROLTYPE_BOOLEAN,
MIXERCONTROL_CONTROLTYPE_ONOFF,
MIXERCONTROL_CONTROLTYPE_MUTE,
MIXERCONTROL_CONTROLTYPE_MONO,
MIXERCONTROL_CONTROLTYPE_LOUDNESS,
MIXERCONTROL_CONTROLTYPE_STEREOENH,
MIXERCONTROL_CONTROLTYPE_BUTTON,
MIXERCONTROL_CONTROLTYPE_DECIBELS,
MIXERCONTROL_CONTROLTYPE_SIGNED,
MIXERCONTROL_CONTROLTYPE_SLIDER,
MIXERCONTROL_CONTROLTYPE_PAN,
MIXERCONTROL_CONTROLTYPE_QSOUNDPAN,
MIXERCONTROL_CONTROLTYPE_SINGLESELECT,
MIXERCONTROL_CONTROLTYPE_MUX,
MIXERCONTROL_CONTROLTYPE_MULTIPLESELECT,
MIXERCONTROL_CONTROLTYPE_MIXER,
MIXERCONTROL_CONTROLTYPE_UNSIGNEDMETER,
MIXERCONTROL_CONTROLTYPE_UNSIGNED,
MIXERCONTROL_CONTROLTYPE_BASS,
MIXERCONTROL_CONTROLTYPE_EQUALIZER,
MIXERCONTROL_CONTROLTYPE_FADER,
MIXERCONTROL_CONTROLTYPE_TREBLE,
MIXERCONTROL_CONTROLTYPE_VOLUME,
MIXERCONTROL_CONTROLTYPE_MICROTIME,
MIXERCONTROL_CONTROLTYPE_MILLITIME,
MIXERCONTROL_CONTROLTYPE_PERCENT,
};
int num_mixers = mixerGetNumDevs();
int mixer = -1;
int retval = -1;
for(int i=0; i<num_mixers; i++) // for each mixer
{
mixerOpen(out mixer, i, 0, 0, 0);
MIXERCAPS mc = new MIXERCAPS();
retval = mixerGetDevCaps(mixer, ref mc, Marshal.SizeOf(mc));
if(retval == MMSYSERR_NOERROR)
{
int num_dest = mc.cDestinations;
for(int j=0; j<num_dest; j++) // for each destination line in this mixer
{
MIXERLINE dst_line = new MIXERLINE();
dst_line.cbStruct = Marshal.SizeOf(dst_line);
dst_line.dwDestination = j;
retval = mixerGetLineInfo(mixer, ref dst_line, MIXER_GETLINEINFOF_DESTINATION);
if(retval == MMSYSERR_NOERROR)
{
for(int k=0; k<30; k++) // for each control in this destination line
{
MIXERLINECONTROLS dst_lc = new MIXERLINECONTROLS();
int mcSize = 152;
dst_lc.pamxctrl = Marshal.AllocCoTaskMem(mcSize);
dst_lc.cbStruct = Marshal.SizeOf(dst_lc);
dst_lc.dwLineID = dst_line.dwLineID;
dst_lc.dwControl = ctrl_list[k];
dst_lc.cControls = 1;
dst_lc.cbmxctrl = mcSize;
// Get the control
retval = mixerGetLineControls(mixer, ref dst_lc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
if(retval == MMSYSERR_NOERROR)
{
MIXERCONTROL ctrl = new MIXERCONTROL();
ctrl.cbStruct = mcSize;
// Copy the control into the destination structure
ctrl = (MIXERCONTROL)Marshal.PtrToStructure(dst_lc.pamxctrl, typeof(MIXERCONTROL));
MIXERCONTROLDETAILS details = new MIXERCONTROLDETAILS();
int size = Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_SIGNED));
details.dwControlID = ctrl.dwControlID;
details.cbDetails = size;
details.item = ctrl.cMultipleItems;
if(details.item > 0) size *= details.item;
details.paDetails = Marshal.AllocCoTaskMem(size);
details.cbStruct = Marshal.SizeOf(details);
details.cChannels = 1;
if(details.item > 0)
{
if(index != save.Count)
{
int rec_index = (int)save[index];
int[] val = new int[details.item];
for(int m=0; m<details.item; m++)
{
if(m == rec_index) val[m] = 1;
else val[m] = 0;
}
Marshal.Copy(val, 0, details.paDetails, details.item);
retval = mixerSetControlDetails(mixer, ref details, MIXER_GETCONTROLDETAILSF_VALUE);
if(retval == MMSYSERR_NOERROR)
index++;
}
}
else
{
MIXERCONTROLDETAILS_UNSIGNED val = new MIXERCONTROLDETAILS_UNSIGNED();
val.dwValue = (int)save[index];
Marshal.StructureToPtr(val, details.paDetails, false);
retval = mixerSetControlDetails(mixer, ref details, MIXER_GETCONTROLDETAILSF_VALUE);
if(retval == MMSYSERR_NOERROR)
index++;
}
Marshal.FreeCoTaskMem(details.paDetails);
}
Marshal.FreeCoTaskMem(dst_lc.pamxctrl);
}
int num_src = dst_line.cConnections;
for(int k=0; k<num_src; k++) // for each source line connected to this destination
{
MIXERLINE src_line = new MIXERLINE();
src_line.cbStruct = dst_line.cbStruct;
src_line.dwDestination = dst_line.dwDestination;
src_line.dwSource = k;
retval = mixerGetLineInfo(mixer, ref src_line, MIXER_GETLINEINFOF_SOURCE);
if(retval == MMSYSERR_NOERROR)
{
for(int l=0; l<30; l++) // for each control in this source line
{
MIXERLINECONTROLS src_lc = new MIXERLINECONTROLS();
int mcSize = 152;
src_lc.pamxctrl = Marshal.AllocCoTaskMem(mcSize);
src_lc.cbStruct = Marshal.SizeOf(src_lc);
src_lc.dwLineID = src_line.dwLineID;
src_lc.dwControl = ctrl_list[l];
src_lc.cControls = 1;
src_lc.cbmxctrl = mcSize;
// Get the control
retval = mixerGetLineControls(mixer, ref src_lc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
if(retval == MMSYSERR_NOERROR)
{
MIXERCONTROL ctrl = new MIXERCONTROL();
ctrl.cbStruct = mcSize;
// Copy the control into the destination structure
ctrl = (MIXERCONTROL)Marshal.PtrToStructure(src_lc.pamxctrl, typeof(MIXERCONTROL));
MIXERCONTROLDETAILS details = new MIXERCONTROLDETAILS();
int size;
if(l<20) size = Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_SIGNED));
else size = Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_UNSIGNED));
details.dwControlID = ctrl.dwControlID;
details.paDetails = Marshal.AllocCoTaskMem(size);
details.cbStruct = Marshal.SizeOf(details);
details.cChannels = 1;
details.item = ctrl.cMultipleItems;
details.cbDetails = size;
if(details.item > 0)
{
int rec_index = (int)save[index];
MIXERCONTROLDETAILS_UNSIGNED[] val = new MIXERCONTROLDETAILS_UNSIGNED[details.item];
for(int m=0; m<details.item; m++)
val[m] = new MIXERCONTROLDETAILS_UNSIGNED();
val[rec_index].dwValue = 1;
Marshal.StructureToPtr(val[0], details.paDetails, false);
}
else
{
MIXERCONTROLDETAILS_UNSIGNED val = new MIXERCONTROLDETAILS_UNSIGNED();
val.dwValue = (int)save[index];
Marshal.StructureToPtr(val, details.paDetails, false);
}
retval = mixerSetControlDetails(mixer, ref details, MIXER_GETCONTROLDETAILSF_VALUE);
if(retval == MMSYSERR_NOERROR)
index++;
Marshal.FreeCoTaskMem(details.paDetails);
}
Marshal.FreeCoTaskMem(src_lc.pamxctrl);
}
}
}
}
}
}
}
mixerClose(mixer);
}
private static bool SetMute(int mixerID, uint dst_type, uint src_type, bool val)
{
int mixer;
MIXERCONTROL muteCtrl = new MIXERCONTROL();
bool currentMute = GetMute(mixerID, dst_type, src_type);
if(currentMute == val) return true;
mixerOpen(out mixer, mixerID, 0, 0, 0);
bool success = GetControlByType(mixer, dst_type, src_type, MIXERCONTROL_CONTROLTYPE_MUTE, out muteCtrl);
if(success == true)
{
MIXERCONTROLDETAILS mxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED mute = new MIXERCONTROLDETAILS_UNSIGNED();
mxcd.item = 0;
mxcd.dwControlID = muteCtrl.dwControlID;
mxcd.cbStruct = Marshal.SizeOf(mxcd);
mxcd.cbDetails = Marshal.SizeOf(mute);
// Allocate a buffer for the control value buffer
mxcd.cChannels = 1;
if(val) mute.dwValue = 1;
else mute.dwValue = 0;
// Copy the data into the control value buffer
mxcd.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_UNSIGNED)));
Marshal.StructureToPtr(mute, mxcd.paDetails,false);
// Set the control value
int retval = mixerSetControlDetails(mixer, ref mxcd, MIXER_SETCONTROLDETAILSF_VALUE);
if(retval == MMSYSERR_NOERROR)
{
currentMute = GetMute(mixerID, dst_type, src_type);
if(currentMute != val)
success = false;
else success = true;
}
else success = false;
Marshal.FreeCoTaskMem(mxcd.paDetails);
}
else success = false;
mixerClose(mixer);
return success;
}
private static bool SetUnsigned(int mixer, MIXERCONTROL ctrl, int num)
{
int current_val;
if(!GetUnsigned(mixer, ctrl, out current_val))
return false;
if(current_val == num)
return true;
if(num > ctrl.lMaximum) num = ctrl.lMaximum;
if(num < ctrl.lMinimum) num = ctrl.lMinimum;
MIXERCONTROLDETAILS mxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED val = new MIXERCONTROLDETAILS_UNSIGNED();
mxcd.item = 0;
mxcd.dwControlID = ctrl.dwControlID;
mxcd.cbStruct = Marshal.SizeOf(mxcd);
mxcd.cbDetails = Marshal.SizeOf(val);
mxcd.cChannels = 1;
val.dwValue = num;
mxcd.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(val));
Marshal.StructureToPtr(val, mxcd.paDetails, false);
int retval = mixerSetControlDetails(mixer, ref mxcd, MIXER_SETCONTROLDETAILSF_VALUE);
Marshal.FreeCoTaskMem(mxcd.paDetails);
if(retval != MMSYSERR_NOERROR)
return false;
if(!GetUnsigned(mixer, ctrl, out current_val))
return false;
if(current_val == num)
return true;
else
return false;
}
private static void SetVolumeControl(int hmixer, MIXERCONTROL mxc,
int volume)
{
// This function sets the value for a volume control.
// Returns True if successful
MIXERCONTROLDETAILS mxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED vol = new
MIXERCONTROLDETAILS_UNSIGNED();
mxcd.item = 0;
mxcd.dwControlID = mxc.dwControlID;
mxcd.cbStruct = Marshal.SizeOf(mxcd);
mxcd.cbDetails = Marshal.SizeOf(vol);
// Allocate a buffer for the control value buffer
mxcd.cChannels = 1;
vol.dwValue = volume;
// Copy the data into the control value buffer
//mxcd.paDetails = vol;
//(MIXERCONTROL)Marshal.PtrToStructure(mxlc.pamxctrl,typeof(MIXERCONTROL));
mxcd.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof (MIXERCONTROLDETAILS_UNSIGNED)));
Marshal.StructureToPtr(vol, mxcd.paDetails, false);
// Set the control value
try
{
CheckErr(mixerSetControlDetails(hmixer, ref mxcd,
MIXER_SETCONTROLDETAILSF_VALUE));
}
catch (Exception e)
{
throw e;
}
finally
{
Marshal.FreeCoTaskMem(mxcd.paDetails);
}
}
private static bool GetVolumeControl(int hmixer, int componentType, int ctrlType, out MIXERCONTROL mxc,
out int vCurrentVol)
{
// This function attempts to obtain a mixer control.
// Returns True if successful.
MIXERLINECONTROLS mxlc = new MIXERLINECONTROLS();
MIXERLINE mxl = new MIXERLINE();
MIXERCONTROLDETAILS pmxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED du = new MIXERCONTROLDETAILS_UNSIGNED();
mxc = new MIXERCONTROL();
int rc;
bool retValue;
vCurrentVol = -1;
mxl.cbStruct = Marshal.SizeOf(mxl);
mxl.dwComponentType = componentType;
rc = mixerGetLineInfoA(hmixer, ref mxl, MIXER_GETLINEINFOF_COMPONENTTYPE);
if (MMSYSERR_NOERROR == rc)
{
int sizeofMIXERCONTROL = 152;
int ctrl = Marshal.SizeOf(typeof (MIXERCONTROL));
mxlc.pamxctrl = Marshal.AllocCoTaskMem(sizeofMIXERCONTROL);
mxlc.cbStruct = Marshal.SizeOf(mxlc);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControl = ctrlType;
mxlc.cControls = 1;
mxlc.cbmxctrl = sizeofMIXERCONTROL;
// Allocate a buffer for the control
mxc.cbStruct = sizeofMIXERCONTROL;
// Get the control
rc = mixerGetLineControlsA(hmixer, ref mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
if (MMSYSERR_NOERROR == rc)
{
retValue = true;
// Copy the control into the destination structure
mxc = (MIXERCONTROL)Marshal.PtrToStructure(mxlc.pamxctrl, typeof (MIXERCONTROL));
}
else
{
retValue = false;
}
int sizeofMIXERCONTROLDETAILS = Marshal.SizeOf(typeof (MIXERCONTROLDETAILS));
int sizeofMIXERCONTROLDETAILS_UNSIGNED = Marshal.SizeOf(typeof (MIXERCONTROLDETAILS_UNSIGNED));
pmxcd.cbStruct = sizeofMIXERCONTROLDETAILS;
pmxcd.dwControlID = mxc.dwControlID;
pmxcd.paDetails =
Marshal.AllocCoTaskMem(sizeofMIXERCONTROLDETAILS_UNSIGNED);
pmxcd.cChannels = 1;
pmxcd.item = 0;
pmxcd.cbDetails = sizeofMIXERCONTROLDETAILS_UNSIGNED;
rc = mixerGetControlDetailsA(hmixer, ref pmxcd, MIXER_GETCONTROLDETAILSF_VALUE);
du =
(MIXERCONTROLDETAILS_UNSIGNED)Marshal.PtrToStructure(pmxcd.paDetails, typeof (MIXERCONTROLDETAILS_UNSIGNED));
vCurrentVol = du.dwValue;
return retValue;
}
retValue = false;
return retValue;
}
public static int GetMux(int mixerID)
{
int mixer;
MIXERCONTROL ctrl = new MIXERCONTROL();
mixerOpen(out mixer, mixerID, 0, 0, 0);
GetControlByType(mixer, MIXERLINE_COMPONENTTYPE_DST_WAVEIN, 0, MIXERCONTROL_CONTROLTYPE_MUX, out ctrl);
MIXERCONTROLDETAILS details = new MIXERCONTROLDETAILS();
int size = Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_UNSIGNED));
details.dwControlID = ctrl.dwControlID;
details.item = ctrl.cMultipleItems;
details.cbDetails = size;
if(details.item > 0) size *= ctrl.cMultipleItems;
details.paDetails = Marshal.AllocCoTaskMem(size);
details.cbStruct = Marshal.SizeOf(details);
details.cChannels = 1;
int retval = mixerGetControlDetails(mixer, ref details, MIXER_GETCONTROLDETAILSF_VALUE);
if(retval == MMSYSERR_NOERROR)
{
if(details.item > 0)
{
MIXERCONTROLDETAILS_UNSIGNED[] val = new MIXERCONTROLDETAILS_UNSIGNED[details.item];
for(int m=0; m<details.item; m++)
{
IntPtr ptr = new IntPtr(details.paDetails.ToInt32() + m*details.cbDetails);
val[m] = new MIXERCONTROLDETAILS_UNSIGNED();
val[m] = (MIXERCONTROLDETAILS_UNSIGNED)Marshal.PtrToStructure(ptr, typeof(MIXERCONTROLDETAILS_UNSIGNED));
if(val[m].dwValue == 1)
{
retval = m;
m = details.item;
}
}
}
}
mixerClose(mixer);
return retval;
}
void SetVolume(uint value)
{
MIXERCONTROLDETAILS volCtl = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED volDat = new MIXERCONTROLDETAILS_UNSIGNED();
double volValue = (double)value * (double)(_volMax - _volMin) / 100D + _volMin;
volDat.Value = (uint)volValue;
Debug.WriteLine(string.Format("MixerAPI.SetCurrentVolume vol:{0} volMax:{1} volMin:{2} param:{3}",
value, _volMax, _volMin, volDat.Value));
IntPtr volPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(new MIXERCONTROLDETAILS_UNSIGNED()));
Marshal.StructureToPtr(volDat, volPtr, false);
volCtl.StructSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS());
volCtl.ControlID = _volumeID;
volCtl.Channels = 1;
volCtl.MultipleItems = 0;
volCtl.DetailsItemSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS_UNSIGNED());
volCtl.DetailsPointer = volPtr;
uint mmresult = mixerSetControlDetails(_hMixer, ref volCtl,
MIXER_OBJECTF.HMIXER, MIXER_GETCONTROLDETAILSF.VALUE);
Marshal.FreeCoTaskMem(volPtr);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
throw new MixerException("mixerSetControlDetails" , mmresult);
}
}
private static bool SetVolume(int mixerID, uint dst_type, uint src_type, int val)
{
int mixer;
MIXERCONTROL volCtrl = new MIXERCONTROL();
int currentVol = GetVolume(mixerID, dst_type, src_type);
if(currentVol == val) return true;
mixerOpen(out mixer, mixerID, 0, 0, 0);
bool success = GetControlByType(mixer, dst_type, src_type, MIXERCONTROL_CONTROLTYPE_VOLUME, out volCtrl);
if(success == true)
{
if(val>volCtrl.lMaximum) val = volCtrl.lMaximum;
if(val<volCtrl.lMinimum) val = volCtrl.lMinimum;
MIXERCONTROLDETAILS mxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED vol = new MIXERCONTROLDETAILS_UNSIGNED();
mxcd.item = 0;
mxcd.dwControlID = volCtrl.dwControlID;
mxcd.cbStruct = Marshal.SizeOf(mxcd);
mxcd.cbDetails = Marshal.SizeOf(vol);
// Allocate a buffer for the control value buffer
mxcd.cChannels = 1;
vol.dwValue = val;
// Copy the data into the control value buffer
mxcd.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_UNSIGNED)));
Marshal.StructureToPtr(vol, mxcd.paDetails,false);
// Set the control value
int retval = mixerSetControlDetails(mixer, ref mxcd, MIXER_SETCONTROLDETAILSF_VALUE);
if(retval == MMSYSERR_NOERROR)
{
currentVol = GetVolume(mixerID, dst_type, src_type);
if(currentVol != val)
success = false;
else success = true;
}
else success = false;
Marshal.FreeCoTaskMem(mxcd.paDetails);
}
else success = false;
mixerClose(mixer);
return success;
}
// This function attempts to obtain a specified mixer control/component pair -
// returns true if successful.
private static bool GetMixerControl( // GetMixerControl
int hmixer,
int component,
int control,
out MIXERCONTROL mxc,
out int vCurrentVol)
{
bool retValue = false;
mxc = new MIXERCONTROL();
MIXERLINECONTROLS mxlc = new MIXERLINECONTROLS();
MIXERLINE mxl = new MIXERLINE();
MIXERCONTROLDETAILS pmxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED du = new MIXERCONTROLDETAILS_UNSIGNED();
vCurrentVol = -1; // A dummy value
mxl.cbStruct = Marshal.SizeOf(mxl);
mxl.dwComponentType = component;
int rc = mixerGetLineInfoA(
hmixer,
ref mxl,
MIXER_GETLINEINFOF_COMPONENTTYPE);
if (MMSYSERR_NOERROR == rc)
{
int sizeofMIXERCONTROL = 152;
int ctrl = Marshal.SizeOf(typeof(MIXERCONTROL));
mxlc.pamxctrl = Marshal.AllocCoTaskMem(sizeofMIXERCONTROL);
mxlc.cbStruct = Marshal.SizeOf(mxlc);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControl = control;
mxlc.cControls = 1;
mxlc.cbmxctrl = sizeofMIXERCONTROL;
// Allocate a buffer for the control
mxc.cbStruct = sizeofMIXERCONTROL;
// Get the control
rc = mixerGetLineControlsA(
hmixer,
ref mxlc,
MIXER_GETLINECONTROLSF_ONEBYTYPE);
if (MMSYSERR_NOERROR == rc)
{
retValue = true;
// Copy the control into the destination structure
mxc = (MIXERCONTROL)Marshal.PtrToStructure(
mxlc.pamxctrl,
typeof(MIXERCONTROL));
}
int sizeofMIXERCONTROLDETAILS =
Marshal.SizeOf(typeof(MIXERCONTROLDETAILS));
int sizeofMIXERCONTROLDETAILS_UNSIGNED =
Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_UNSIGNED));
pmxcd.cbStruct = sizeofMIXERCONTROLDETAILS;
pmxcd.dwControlID = mxc.dwControlID;
pmxcd.paDetails = Marshal.AllocCoTaskMem(sizeofMIXERCONTROLDETAILS_UNSIGNED);
pmxcd.cChannels = 1;
pmxcd.item = 0;
pmxcd.cbDetails = sizeofMIXERCONTROLDETAILS_UNSIGNED;
rc = mixerGetControlDetailsA(
hmixer,
ref pmxcd,
MIXER_GETCONTROLDETAILSF_VALUE);
du = (MIXERCONTROLDETAILS_UNSIGNED)Marshal.PtrToStructure(
pmxcd.paDetails,
typeof(MIXERCONTROLDETAILS_UNSIGNED));
vCurrentVol = du.dwValue;
return(retValue); // true
}
return(retValue); // false
}
private static bool SetBool(int mixer, MIXERCONTROL ctrl, bool b)
{
bool current;
if(!GetBool(mixer, ctrl, out current))
return false;
if(current == b)
return true;
MIXERCONTROLDETAILS mxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED val = new MIXERCONTROLDETAILS_UNSIGNED();
mxcd.item = 0;
mxcd.dwControlID = ctrl.dwControlID;
mxcd.cbStruct = Marshal.SizeOf(mxcd);
mxcd.cbDetails = Marshal.SizeOf(val);
// Allocate a buffer for the control value buffer
mxcd.cChannels = 1;
if(b) val.dwValue = 1;
else val.dwValue = 0;
// Copy the data into the control value buffer
mxcd.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(val));
Marshal.StructureToPtr(val, mxcd.paDetails, false);
// Set the control value
int retval = mixerSetControlDetails(mixer, ref mxcd, MIXER_SETCONTROLDETAILSF_VALUE);
if(retval != MMSYSERR_NOERROR)
{
Marshal.FreeCoTaskMem(mxcd.paDetails);
return false;
}
Marshal.FreeCoTaskMem(mxcd.paDetails);
if(!GetBool(mixer, ctrl, out current))
return false;
if(current != b)
return false;
else return true;
}
private static bool SetVolumeControl(int hmixer, MIXERCONTROL mxc, int volume)
{
// This function sets the value for a volume control.
// Returns True if successful
bool retValue;
int rc;
MIXERCONTROLDETAILS mxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED vol = new MIXERCONTROLDETAILS_UNSIGNED();
mxcd.item = 0;
mxcd.dwControlID = mxc.dwControlID;
mxcd.cbStruct = Marshal.SizeOf(mxcd);
mxcd.cbDetails = Marshal.SizeOf(vol);
// Allocate a buffer for the control value buffer
mxcd.cChannels = 1;
vol.dwValue = volume;
// Copy the data into the control value buffer
mxcd.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof (MIXERCONTROLDETAILS_UNSIGNED)));
Marshal.StructureToPtr(vol, mxcd.paDetails, false);
// Set the control value
rc = mixerSetControlDetails(hmixer, ref mxcd, MIXER_SETCONTROLDETAILSF_VALUE);
if (MMSYSERR_NOERROR == rc)
{
retValue = true;
}
else
{
retValue = false;
}
return retValue;
}
private static void GetVolumeControl(int hmixer, int componentType,
int ctrlType, out MIXERCONTROL mxc, out int vCurrentVol)
{
// This function attempts to obtain a mixer control.
// Returns True if successful.
MIXERLINECONTROLS mxlc = new MIXERLINECONTROLS();
MIXERLINE mxl = new MIXERLINE();
MIXERCONTROLDETAILS pmxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED du = new
MIXERCONTROLDETAILS_UNSIGNED();
mxc = new MIXERCONTROL();
vCurrentVol = -1;
//mxl.szShortName = new string(' ', MIXER_SHORT_NAME_CHARS);
//mxl.szName = new string(' ', MIXER_LONG_NAME_CHARS);
mxl.cbStruct = Marshal.SizeOf(mxl);
mxl.dwComponentType = componentType;
// Obtain a line corresponding to the component public enum
CheckErr(mixerGetLineInfoA(hmixer, ref mxl,
MIXER_GETLINEINFOF_COMPONENTTYPE));
int sizeofMIXERCONTROL = 152;
//Marshal.SizeOf(typeof(MIXERCONTROL))
int ctrl = Marshal.SizeOf(typeof (MIXERCONTROL));
mxlc.pamxctrl = Marshal.AllocCoTaskMem(sizeofMIXERCONTROL); //new MIXERCONTROL();
mxlc.cbStruct = Marshal.SizeOf(mxlc);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControl = ctrlType;
mxlc.cControls = 1;
mxlc.cbmxctrl = sizeofMIXERCONTROL;
// Allocate a buffer for the control
mxc.cbStruct = sizeofMIXERCONTROL;
// Get the control
try
{
CheckErr(mixerGetLineControlsA(hmixer, ref mxlc,
MIXER_GETLINECONTROLSF_ONEBYTYPE));
// Copy the control into the destination structure
mxc = (MIXERCONTROL)Marshal.PtrToStructure(mxlc.pamxctrl, typeof (MIXERCONTROL));
}
catch (Exception e)
{
throw e;
}
finally
{
Marshal.FreeCoTaskMem(mxlc.pamxctrl);
}
int sizeofMIXERCONTROLDETAILS =
Marshal.SizeOf(typeof (MIXERCONTROLDETAILS));
int sizeofMIXERCONTROLDETAILS_UNSIGNED =
Marshal.SizeOf(typeof (MIXERCONTROLDETAILS_UNSIGNED));
pmxcd.cbStruct = sizeofMIXERCONTROLDETAILS;
pmxcd.dwControlID = mxc.dwControlID;
pmxcd.paDetails =
Marshal.AllocCoTaskMem(sizeofMIXERCONTROLDETAILS_UNSIGNED);
pmxcd.cChannels = 1;
pmxcd.item = 0;
pmxcd.cbDetails = sizeofMIXERCONTROLDETAILS_UNSIGNED;
try
{
CheckErr(mixerGetControlDetailsA(hmixer, ref pmxcd,
MIXER_GETCONTROLDETAILSF_VALUE));
du =
(MIXERCONTROLDETAILS_UNSIGNED)Marshal.PtrToStructure(pmxcd.paDetails, typeof (MIXERCONTROLDETAILS_UNSIGNED));
}
catch (Exception e)
{
throw e;
}
finally
{
Marshal.FreeCoTaskMem(pmxcd.paDetails);
}
vCurrentVol = du.dwValue;
}
