internal AudioLine(AudioDevice audioDevice, MIXERLINE mxl)
{
_audioDevice = audioDevice;
if (AudioDevice.RecordingSupport)
{
Direction = MixerType.Recording;
}
else if (AudioDevice.PlaybackSupport)
{
Direction = MixerType.Playback;
}
Channels = mxl.cChannels;
CControls = mxl.cControls;
Connections = mxl.cConnections;
Flag = mxl.fdwLine;
Destination = mxl.dwDestination;
Name = mxl.szName;
Id = mxl.dwLineID;
ComponentType = mxl.dwComponentType;
Source = mxl.dwSource;
ReloadAudioLineControls();
ReloadValues();
}
uint mixerGetLineInfo(IntPtr hmxobj,
ref MIXERLINE pmxl, MIXER_OBJECTF objF, MIXER_GETLINEINFOF lineF)
{
uint flag = (uint)objF | (uint)lineF;
return(mixerGetLineInfo(hmxobj, ref pmxl, flag));
}
[DllImport("winmm.dll", CharSet = CharSet.Ansi)] // mixerGetLineInfoA
private static extern int mixerGetLineInfoA(
int hmxobj,
ref MIXERLINE pmxl,
int fdwInfo);
internal static DestinationLine GetLine(Mixer mixer, int index)
{
MIXERLINE m = new MIXERLINE();
m.cbStruct = Marshal.SizeOf(m);
m.dwDestination = index;
mixerGetLineInfoA(mixer.Handle, ref m, MIXER_GETLINEINFOF_DESTINATION);
return(new DestinationLine(mixer, m));
}
internal static SourceLine GetLine(Mixer mixer, int destIndex, int srcIndex)
{
MIXERLINE m = new MIXERLINE();
m.cbStruct = Marshal.SizeOf(m);
m.dwDestination = destIndex;
m.dwSource = srcIndex;
mixerGetLineInfoA(mixer.Handle, ref m, MIXER_GETLINEINFOF_SOURCE);
return(new SourceLine(mixer, m));
}
private void ReloadLines()
{
MMErrors errorCode = 0;
_audioLines.Clear();
MIXERLINE mxl = new MIXERLINE();
uint dwDestination;
unchecked
{
dwDestination = (uint)-1;
}
mxl.cbStruct = (uint)Marshal.SizeOf(mxl);
mxl.dwComponentType = _componentType;
errorCode = (MMErrors)MixerNative.mixerGetLineInfo(_hMixer, ref mxl, MIXER_GETLINEINFOF.COMPONENTTYPE);
if (errorCode != MMErrors.MMSYSERR_NOERROR)
{
throw new MixerException(errorCode, WMME.Audio.GetErrorDescription(FuncName.fnMixerGetLineInfo, errorCode));
}
dwDestination = mxl.dwDestination;
var mixLine = new AudioLine(this, mxl);
if (mixLine.CControls != 0 && !(mixLine.CControls == 1 && mixLine.Controls[0].ControlType == MIXERCONTROL_CONTROLTYPE.MUX))
{
_audioLines.Add(mixLine);
}
int cConnections = (int)mxl.cConnections;
for (int i = 0; i < cConnections; i++)
{
mxl.cbStruct = (uint)Marshal.SizeOf(mxl);
mxl.dwDestination = dwDestination;
mxl.dwSource = (uint)i;
errorCode = (MMErrors)MixerNative.mixerGetLineInfo(Handle, ref mxl, MIXER_GETLINEINFOF.SOURCE);
if (errorCode != MMErrors.MMSYSERR_NOERROR)
{
throw new MixerException(errorCode, WMME.Audio.GetErrorDescription(FuncName.fnMixerGetLineInfo, errorCode));
}
var mixLineNew = new AudioLine(this, mxl);
if (mixLineNew.CControls != 0)
{
_audioLines.Add(mixLineNew);
}
}
}
private MMSYSERR GetVolumeInfo(IntPtr hmixer, int ctrlType, ref MIXERCONTROL mxc)
{
MMSYSERR err = MMSYSERR.NOERROR;
try
{
IntPtr hmem = IntPtr.Zero;
MIXERLINECONTROLS mxlc = new MIXERLINECONTROLS();
mxlc.cbStruct = (uint)Marshal.SizeOf(mxlc);
MIXERLINE mxl = new MIXERLINE();
mxl.cbStruct = (uint)Marshal.SizeOf(mxl);
mxl.dwComponentType = (uint)MIXERLINE_COMPONENTTYPE.DST_SPEAKERS;
err = mixerGetLineInfo(hmixer, ref mxl, MIXER_GETLINEINFOF.COMPONENTTYPE);
if (err == MMSYSERR.NOERROR)
{
mxlc.dwLineID = (uint)mxl.dwLineID;
mxlc.dwControlID = (uint)ctrlType;
mxlc.cControls = 1;
mxlc.cbmxctrl = (uint)Marshal.SizeOf(mxc);
hmem = malloc(Marshal.SizeOf(mxlc));
mxlc.pamxctrl = hmem;
mxc.cbStruct = (uint)Marshal.SizeOf(mxc);
err = mixerGetLineControls(hmixer, ref mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
if (err == MMSYSERR.NOERROR)
{
mxc = (MIXERCONTROL)Marshal.PtrToStructure(mxlc.pamxctrl, typeof(MIXERCONTROL));
if (hmem != IntPtr.Zero)
{
free(hmem, Marshal.SizeOf(mxc));
}
return(err);
}
if (hmem != IntPtr.Zero)
{
free(hmem, Marshal.SizeOf(mxc));
}
}
return(err);
}
catch { return(err); }
}
public static MixerInfo GetMixerControls()
{
MIXERLINE mxl = new MIXERLINE();
MIXERLINECONTROLS mlc = new MIXERLINECONTROLS();
mxl.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERLINE));
mlc.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERLINECONTROLS));
mixerGetLineInfo(IntPtr.Zero, ref mxl, MIXER.OBJECTF_MIXER | MIXER.GETLINEINFOF_DESTINATION);
mlc.dwLineID = mxl.dwLineID;
mlc.cControls = mxl.cControls;
mlc.cbmxctrl = (uint)Marshal.SizeOf(typeof(MIXERCONTROL));
mlc.pamxctrl = Marshal.AllocHGlobal((int)(mlc.cbmxctrl * mlc.cControls));
mixerGetLineControls(IntPtr.Zero, ref mlc, MIXER.OBJECTF_MIXER | MIXER.GETLINECONTROLSF_ALL);
MixerInfo rtn = new MixerInfo();
for (int i = 0; i < mlc.cControls; i++)
{
MIXERCONTROL mxc = (MIXERCONTROL)Marshal.PtrToStructure((IntPtr)((int)mlc.pamxctrl + (int)mlc.cbmxctrl * i), typeof(MIXERCONTROL));
switch (mxc.dwControlType)
{
case MIXERCONTROL_CONTROLTYPE.VOLUME:
rtn.volumeCtl = mxc.dwControlID;
rtn.minVolume = mxc.Bounds.lMinimum;
rtn.maxVolume = mxc.Bounds.lMaximum;
break;
case MIXERCONTROL_CONTROLTYPE.MUTE:
rtn.muteCtl = mxc.dwControlID;
break;
}
}
Marshal.FreeHGlobal(mlc.pamxctrl);
return(rtn);
}
private DestinationLine(Mixer mixer, MIXERLINE line) : base(mixer, line)
{
}
static extern uint mixerGetLineInfo(IntPtr hmxobj, ref MIXERLINE pmxl, MIXER flags);
uint mixerGetLineInfo(IntPtr hmxobj,
ref MIXERLINE pmxl,MIXER_OBJECTF objF , MIXER_GETLINEINFOF lineF )
{
uint flag = (uint)objF | (uint)lineF;
return mixerGetLineInfo(hmxobj, ref pmxl, flag);
}
internal MixerLine(Mixer mixer, MIXERLINE line)
{
this.mixer = mixer;
this.line = line;
}
private SourceLine(Mixer m, MIXERLINE l)
: base(m, l)
{
}
public static extern int mixerGetLineInfoA(int hmxobj, ref MIXERLINE pmxl, uint fdwInfo);
private DestinationLine(Mixer mixer, MIXERLINE line)
: base(mixer, line)
{
}
public static extern int mixerGetLineInfo(int hmxobj, ref MIXERLINE pmxl , int fdwInfo);
private static bool GetControlByID(int mixer, int dst_id, int src_id, uint ctrl_type, out MIXERCONTROL outCtrl)
{
outCtrl = new MIXERCONTROL();
MIXERLINE dst_line = new MIXERLINE();
dst_line.cbStruct = Marshal.SizeOf(dst_line);
dst_line.dwDestination = dst_id;
int retval = mixerGetLineInfo(mixer, ref dst_line, MIXER_GETLINEINFOF_DESTINATION);
if(retval != MMSYSERR_NOERROR)
return false;
if(src_id < 0)
{
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_type;
dst_lc.cControls = 1;
dst_lc.cbmxctrl = mcSize;
// Get the control
retval = mixerGetLineControls(mixer, ref dst_lc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
if(retval != MMSYSERR_NOERROR)
{
Marshal.FreeCoTaskMem(dst_lc.pamxctrl);
return false;
}
MIXERCONTROL ctrl = new MIXERCONTROL();
ctrl.cbStruct = mcSize;
// Copy the control into the destination structure
ctrl = (MIXERCONTROL)Marshal.PtrToStructure(dst_lc.pamxctrl, typeof(MIXERCONTROL));
outCtrl = ctrl;
Marshal.FreeCoTaskMem(dst_lc.pamxctrl);
return true;
}
else
{
MIXERLINE src_line = new MIXERLINE();
src_line.cbStruct = dst_line.cbStruct;
src_line.dwDestination = dst_line.dwDestination;
src_line.dwSource = src_id;
retval = mixerGetLineInfo(mixer, ref src_line, MIXER_GETLINEINFOF_SOURCE);
if(retval != MMSYSERR_NOERROR)
return false;
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_type;
src_lc.cControls = 1;
src_lc.cbmxctrl = mcSize;
// Get the control
retval = mixerGetLineControls(mixer, ref src_lc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
if(retval != MMSYSERR_NOERROR)
{
Marshal.FreeCoTaskMem(src_lc.pamxctrl);
return false;
}
MIXERCONTROL ctrl = new MIXERCONTROL();
ctrl.cbStruct = mcSize;
// Copy the control into the destination structure
ctrl = (MIXERCONTROL)Marshal.PtrToStructure(src_lc.pamxctrl, typeof(MIXERCONTROL));
outCtrl = ctrl;
Marshal.FreeCoTaskMem(src_lc.pamxctrl);
return true;
}
}
public static void Mute(bool mute)
{
// Check if this is vista or XP
if (System.Environment.OSVersion.Version.Major >= 6)
{
EndpointVolume epVol = new EndpointVolume();
epVol.Mute = mute;
epVol.Dispose();
}
else
{
int mixerID = 0;
if (mixerOpen(out mixerID, 0, 0, 0, 0) == MMSYSERR_NOERROR)
{
MIXERLINE line = new MIXERLINE();
line.cbStruct = Marshal.SizeOf(line);
line.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
if (mixerGetLineInfoA(mixerID, ref line, MIXER_GETLINEINFOF_COMPONENTTYPE) == MMSYSERR_NOERROR)
{
int sizeofMIXERCONTROL = 152;
MIXERCONTROL mixerControl = new MIXERCONTROL();
MIXERLINECONTROLS lineControl = new MIXERLINECONTROLS();
lineControl.pamxctrl = Marshal.AllocCoTaskMem(sizeofMIXERCONTROL);
lineControl.cbStruct = Marshal.SizeOf(lineControl);
lineControl.dwLineID = line.dwLineID;
lineControl.dwControl = MIXERCONTROL_CONTROLTYPE_MUTE;
lineControl.cControls = 1;
lineControl.cbmxctrl = sizeofMIXERCONTROL;
mixerControl.cbStruct = sizeofMIXERCONTROL;
if (mixerGetLineControlsA(mixerID, ref lineControl, MIXER_GETLINECONTROLSF_ONEBYTYPE) == MMSYSERR_NOERROR)
{
mixerControl = (MIXERCONTROL)Marshal.PtrToStructure(lineControl.pamxctrl, typeof(MIXERCONTROL));
MIXERCONTROLDETAILS controlDetails = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_BOOLEAN muteValue = new MIXERCONTROLDETAILS_BOOLEAN();
controlDetails.item = 0;
controlDetails.dwControlID = mixerControl.dwControlID;
controlDetails.cbStruct = Marshal.SizeOf(controlDetails);
controlDetails.cbDetails = Marshal.SizeOf(muteValue);
controlDetails.cChannels = 1;
muteValue.dwValue = Convert.ToInt32(mute);
controlDetails.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(muteValue));
Marshal.StructureToPtr(muteValue, controlDetails.paDetails, false);
int rc = mixerSetControlDetails(mixerID, ref controlDetails, MIXER_SETCONTROLDETAILSF_VALUE);
Marshal.FreeCoTaskMem(controlDetails.paDetails);
Marshal.FreeCoTaskMem(lineControl.pamxctrl);
}
}
}
}
}
public static bool InitSoundCard2(int mixerID)
{
int mixer;
int retval = -1;
retval = mixerOpen(out mixer, mixerID, 0, 0, 0);
if(retval != MMSYSERR_NOERROR)
return false;
MIXERCAPS mc = new MIXERCAPS();
retval = mixerGetDevCaps(mixer, ref mc, Marshal.SizeOf(mc));
if(retval != MMSYSERR_NOERROR)
goto failed;
MIXERLINE dst_line = new MIXERLINE();
dst_line.cbStruct = Marshal.SizeOf(dst_line);
dst_line.dwDestination = 0;
retval = mixerGetLineInfo(mixer, ref dst_line, MIXER_GETLINEINFOF_DESTINATION);
if(retval != MMSYSERR_NOERROR)
goto failed;
for(int i=0; i<dst_line.cConnections; i++)
{
MIXERCONTROL ctrl = new MIXERCONTROL();
GetControlByID(mixerID, 0, i, MIXERCONTROL_CONTROLTYPE_MUTE, out ctrl);
SetBool(mixerID, ctrl, true);
}
mixerClose(mixer);
SetMainVolume(mixerID, 100);
SetWaveOutVolume(mixerID, 100);
SetMainMute(mixerID, false);
SetWaveOutMute(mixerID, false);
return true;
failed:
mixerClose(mixer);
return false;
}
private static extern MMSYSERR mixerGetLineInfo(IntPtr hmxobj, ref MIXERLINE pmxl, MIXER_GETLINEINFOF fdwInfo);
public static extern int MixerGetLineInfo(IntPtr hmxobj, ref MIXERLINE pmxl, uint fdwInfo);
public MixerAPI()
{
_hMixer = new IntPtr();
uint mmresult = mixerOpen(ref _hMixer, 0, IntPtr.Zero, IntPtr.Zero, MIXER_OBJECTF.MIXER);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
throw new MixerException("mixerOpen:",mmresult);
}
MIXERLINE lineInfo = new MIXERLINE();
lineInfo.StructSize = (uint)Marshal.SizeOf(new MIXERLINE());
lineInfo.ComponentType =(uint)MIXERLINE_COMPONENTTYPE.SRC_WAVEOUT;
//volInfo.ComponentType =(uint)MIXERLINE_COMPONENTTYPE.DST_SPEAKERS;
mmresult = mixerGetLineInfo(_hMixer, ref lineInfo, MIXER_OBJECTF.HMIXER
,MIXER_GETLINEINFOF.COMPONENTTYPE);
IntPtr ctlPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(new MIXERCONTROL()));
MIXERLINECONTROLS ctlParam = new MIXERLINECONTROLS();
ctlParam.StructSize = (uint)Marshal.SizeOf(new MIXERLINECONTROLS());
ctlParam.LineID = lineInfo.dwLineID;
ctlParam.ControlType = MIXERCONTROL_CONTROLTYPE.MUTE;
ctlParam.Controls = 1;
ctlParam.MixerControlItemSize= (uint)Marshal.SizeOf(new MIXERCONTROL());
ctlParam.MixerControlArray = ctlPtr;
mmresult = mixerGetLineControls(_hMixer, ref ctlParam,MIXER_OBJECTF.HMIXER
,MIXER_GETLINECONTROLSF.ONEBYTYPE);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
Marshal.FreeCoTaskMem(ctlPtr);
throw new MixerException("mixerGetLineControls", mmresult);
}
MIXERCONTROL muteCtrl = (MIXERCONTROL)Marshal.PtrToStructure(ctlPtr, typeof(MIXERCONTROL));
_muteID = muteCtrl.ControlID;
ctlParam.ControlType = MIXERCONTROL_CONTROLTYPE.VOLUME;
//他の値は再利用。まだMarshal.FreeCoTaskMemを呼んではいけない
mmresult = mixerGetLineControls(_hMixer, ref ctlParam,MIXER_OBJECTF.HMIXER
,MIXER_GETLINECONTROLSF.ONEBYTYPE);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
Marshal.FreeCoTaskMem(ctlPtr);
throw new MixerException("mixerGetLineControls" , mmresult);
}
MIXERCONTROL volCtrl = (MIXERCONTROL)Marshal.PtrToStructure(ctlPtr, typeof(MIXERCONTROL));
Marshal.FreeCoTaskMem(ctlPtr);
_volumeID = volCtrl.ControlID;
_volMax = volCtrl.Bounds.UnsignedMaximum;
_volMin = volCtrl.Bounds.UnsignedMinimum;
Debug.WriteLine(string.Format("MixerAPI constructor muteID:{0} volID:{1} volMan:{2} volMin:{3}",
_muteID, _volumeID, _volMax, _volMin));
}
private SourceLine(Mixer m, MIXERLINE l) : base(m, l)
{
}
private static bool GetControlByType(int mixer, uint dst_type, uint src_type, uint ctrl_type, out MIXERCONTROL outCtrl)
{
outCtrl = new MIXERCONTROL();
MIXERCAPS mc = new MIXERCAPS();
int retval = mixerGetDevCaps(mixer, ref mc, Marshal.SizeOf(mc));
if(retval != MMSYSERR_NOERROR)
return false;
int num_dest = mc.cDestinations;
for(int j=0; j<num_dest; j++) // for each destination line
{
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 && dst_line.dwComponentType == dst_type)
{
if(src_type == 0)
{
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_type;
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));
outCtrl = ctrl;
Marshal.FreeCoTaskMem(dst_lc.pamxctrl);
return true;
}
Marshal.FreeCoTaskMem(dst_lc.pamxctrl);
return false;
}
else
{
int num_src = dst_line.cConnections;
for(int k=0; k<num_src; k++) // for all source lines 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 && src_line.dwComponentType == src_type)
{
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_type;
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));
outCtrl = ctrl;
Marshal.FreeCoTaskMem(src_lc.pamxctrl);
return true;
}
Marshal.FreeCoTaskMem(src_lc.pamxctrl);
return false;
}
}
}
}
}
return false;
}
public static void Mute(bool mute)
{
// Check if this is vista or XP
if (System.Environment.OSVersion.Version.Major >= 6)
{
EndpointVolume epVol = new EndpointVolume();
epVol.Mute = mute;
epVol.Dispose();
}
else
{
int mixerID = 0;
if (mixerOpen(out mixerID, 0, 0, 0, 0) == MMSYSERR_NOERROR)
{
MIXERLINE line = new MIXERLINE();
line.cbStruct = Marshal.SizeOf(line);
line.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
if (mixerGetLineInfoA(mixerID, ref line, MIXER_GETLINEINFOF_COMPONENTTYPE) == MMSYSERR_NOERROR)
{
int sizeofMIXERCONTROL = 152;
MIXERCONTROL mixerControl = new MIXERCONTROL();
MIXERLINECONTROLS lineControl = new MIXERLINECONTROLS();
lineControl.pamxctrl = Marshal.AllocCoTaskMem(sizeofMIXERCONTROL);
lineControl.cbStruct = Marshal.SizeOf(lineControl);
lineControl.dwLineID = line.dwLineID;
lineControl.dwControl = MIXERCONTROL_CONTROLTYPE_MUTE;
lineControl.cControls = 1;
lineControl.cbmxctrl = sizeofMIXERCONTROL;
mixerControl.cbStruct = sizeofMIXERCONTROL;
if (mixerGetLineControlsA(mixerID, ref lineControl, MIXER_GETLINECONTROLSF_ONEBYTYPE) == MMSYSERR_NOERROR)
{
mixerControl = (MIXERCONTROL)Marshal.PtrToStructure(lineControl.pamxctrl, typeof(MIXERCONTROL));
MIXERCONTROLDETAILS controlDetails = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_BOOLEAN muteValue = new MIXERCONTROLDETAILS_BOOLEAN();
controlDetails.item = 0;
controlDetails.dwControlID = mixerControl.dwControlID;
controlDetails.cbStruct = Marshal.SizeOf(controlDetails);
controlDetails.cbDetails = Marshal.SizeOf(muteValue);
controlDetails.cChannels = 1;
muteValue.dwValue = Convert.ToInt32(mute);
controlDetails.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(muteValue));
Marshal.StructureToPtr(muteValue, controlDetails.paDetails, false);
int rc = mixerSetControlDetails(mixerID, ref controlDetails, MIXER_SETCONTROLDETAILSF_VALUE);
Marshal.FreeCoTaskMem(controlDetails.paDetails);
Marshal.FreeCoTaskMem(lineControl.pamxctrl);
}
}
}
}
}
public static string GetLineName(int mixer, uint dst_type, uint src_type)
{
MIXERCAPS mc = new MIXERCAPS();
int retval = mixerGetDevCaps(mixer, ref mc, Marshal.SizeOf(mc));
if(retval != MMSYSERR_NOERROR)
return "";
int num_dest = mc.cDestinations;
for(int j=0; j<num_dest; j++) // for each destination line
{
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 && dst_line.dwComponentType == dst_type)
{
if(src_type == 0)
return dst_line.szName;
else
{
int num_src = dst_line.cConnections;
for(int k=0; k<num_src; k++) // for all source lines 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 && src_line.dwComponentType == src_type)
return src_line.szName;
}
}
}
}
return "";
}
public static extern uint mixerGetLineInfo(int hmxobj, ref MIXERLINE pmxl, uint flags);
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);
}
internal static DestinationLine GetLine(Mixer mixer, int index)
{
MIXERLINE m = new MIXERLINE();
m.cbStruct = Marshal.SizeOf(m);
m.dwDestination = index;
mixerGetLineInfoA(mixer.Handle, ref m, MIXER_GETLINEINFOF_DESTINATION);
return new DestinationLine(mixer, m);
}
// 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
}
internal static extern int mixerGetLineInfoA(IntPtr hmxobj, ref
MIXERLINE pmxl, int fdwInfo);
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;
}
internal static SourceLine GetLine(Mixer mixer, int destIndex, int srcIndex)
{
MIXERLINE m = new MIXERLINE();
m.cbStruct = Marshal.SizeOf(m);
m.dwDestination = destIndex;
m.dwSource = srcIndex;
mixerGetLineInfoA(mixer.Handle, ref m, MIXER_GETLINEINFOF_SOURCE);
return new SourceLine(mixer, m);
}
internal MixerLine(Mixer mixer, MIXERLINE line)
{
this.mixer = mixer;
this.line = line;
}
public static MixerInfo GetMixerControls()
{
MIXERLINE mxl = new MIXERLINE();
MIXERLINECONTROLS mlc = new MIXERLINECONTROLS();
mxl.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERLINE));
mlc.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERLINECONTROLS));
mixerGetLineInfo(IntPtr.Zero, ref mxl, MIXER.OBJECTF_MIXER | MIXER.GETLINEINFOF_DESTINATION);
mlc.dwLineID = mxl.dwLineID;
mlc.cControls = mxl.cControls;
mlc.cbmxctrl = (uint)Marshal.SizeOf(typeof(MIXERCONTROL));
mlc.pamxctrl = Marshal.AllocHGlobal((int)(mlc.cbmxctrl * mlc.cControls));
mixerGetLineControls(IntPtr.Zero, ref mlc, MIXER.OBJECTF_MIXER | MIXER.GETLINECONTROLSF_ALL);
MixerInfo rtn = new MixerInfo();
for (int i = 0; i < mlc.cControls; i++)
{
MIXERCONTROL mxc = (MIXERCONTROL)Marshal.PtrToStructure((IntPtr)((int)mlc.pamxctrl + (int)mlc.cbmxctrl * i), typeof(MIXERCONTROL));
switch (mxc.dwControlType)
{
case MIXERCONTROL_CONTROLTYPE.VOLUME:
rtn.volumeCtl = mxc.dwControlID;
rtn.minVolume = mxc.Bounds.lMinimum;
rtn.maxVolume = mxc.Bounds.lMaximum;
break;
case MIXERCONTROL_CONTROLTYPE.MUTE:
rtn.muteCtl = mxc.dwControlID;
break;
}
}
Marshal.FreeHGlobal(mlc.pamxctrl);
return rtn;
}
static extern uint mixerGetLineInfo(IntPtr hmxobj,
ref MIXERLINE pmxl, uint fdwInfo);
private void ReloadAudioDevices()
{
if (_reloadDevicesInProgress)
{
return;
}
MMErrors errorCode = 0;
IntPtr hMixer = IntPtr.Zero;
try
{
_reloadDevicesInProgress = true;
var newAudioDevices = new List <AudioDeviceDescriptor>();
MIXERCAPS wic = new MIXERCAPS();
int iNumDevs = MixerNative.mixerGetNumDevs();
for (int i = 0; i < iNumDevs; i++)
{
// Get info about the next device
errorCode = (MMErrors)MixerNative.mixerGetDevCaps(i, ref wic, Marshal.SizeOf(wic));
if (errorCode != MMErrors.MMSYSERR_NOERROR)
{
throw new MixerException(errorCode, GetErrorDescription(FuncName.fnMixerGetDevCaps, errorCode));
}
errorCode = (MMErrors)MixerNative.mixerOpen(out hMixer, i, IntPtr.Zero, IntPtr.Zero, 0);
if (errorCode != MMErrors.MMSYSERR_NOERROR)
{
throw new MixerException(errorCode, GetErrorDescription(FuncName.fnMixerOpen, errorCode));
}
MIXERLINE mxl = new MIXERLINE();
mxl.cbStruct = (uint)Marshal.SizeOf(mxl);
var deviceDescriptor = new AudioDeviceDescriptor()
{
DeviceId = i,
Name = wic.szPname
};
foreach (var mixerlineComponenttype in AudioDevice.RecordingLineTypes)
{
mxl.dwComponentType = mixerlineComponenttype;
if (MixerNative.mixerGetLineInfo(hMixer, ref mxl, MIXER_GETLINEINFOF.COMPONENTTYPE) == 0)
{
deviceDescriptor.RecordingSupport = true;
deviceDescriptor.RecordingComponentType = mixerlineComponenttype;
break;
}
}
foreach (var mixerlineComponenttype in AudioDevice.PlaybackLineTypes)
{
mxl.dwComponentType = mixerlineComponenttype;
if (MixerNative.mixerGetLineInfo(hMixer, ref mxl, MIXER_GETLINEINFOF.COMPONENTTYPE) == 0)
{
deviceDescriptor.PlaybackSupport = true;
deviceDescriptor.PlaybackComponentType = mixerlineComponenttype;
break;
}
}
if (deviceDescriptor.PlaybackSupport || deviceDescriptor.RecordingSupport)
{
if (deviceDescriptor.PlaybackSupport && deviceDescriptor.RecordingSupport)
{
var playbackDeviceDescriptor = new AudioDeviceDescriptor()
{
DeviceId = deviceDescriptor.DeviceId,
Name = deviceDescriptor.Name,
PlaybackSupport = true,
RecordingSupport = false,
PlaybackComponentType = deviceDescriptor.PlaybackComponentType
};
var recordingDeviceDescriptor = new AudioDeviceDescriptor()
{
DeviceId = deviceDescriptor.DeviceId,
Name = deviceDescriptor.Name,
PlaybackSupport = false,
RecordingSupport = true,
RecordingComponentType = deviceDescriptor.RecordingComponentType
};
newAudioDevices.Add(playbackDeviceDescriptor);
newAudioDevices.Add(recordingDeviceDescriptor);
}
else
{
newAudioDevices.Add(deviceDescriptor);
}
}
}
if (newAudioDevices.Count > 0 || (_audioDevices.Count > 0 && iNumDevs == 0))
{
UpdateAudioDevicesLists(newAudioDevices);
}
}
finally
{
if (hMixer != IntPtr.Zero)
{
MixerNative.mixerClose(hMixer);
}
_reloadDevicesInProgress = false;
}
}
static extern uint mixerGetLineInfo(IntPtr hmxobj, ref MIXERLINE pmxl, MIXER flags);
private static extern int mixerGetLineInfoA(int hmxobj, ref MIXERLINE pmxl, int fdwInfo);
internal static extern int mixerGetLineInfo(IntPtr hmxobj, ref MIXERLINE pmxl, MIXER_GETLINEINFOF fdwInfo);
internal static extern int mixerGetLineInfoA(IntPtr hmxobj, ref
MIXERLINE pmxl, int fdwInfo);
public static extern MmResult mixerGetLineInfo(IntPtr hMixer, ref MIXERLINE mixerLine, MixerFlags dwInfoFlags);
public MixerAPI()
{
_hMixer = new IntPtr();
uint mmresult = mixerOpen(ref _hMixer, 0, IntPtr.Zero, IntPtr.Zero, MIXER_OBJECTF.MIXER);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
throw new MixerException("mixerOpen:", mmresult);
}
MIXERLINE lineInfo = new MIXERLINE();
lineInfo.StructSize = (uint)Marshal.SizeOf(new MIXERLINE());
lineInfo.ComponentType = (uint)MIXERLINE_COMPONENTTYPE.SRC_WAVEOUT;
//volInfo.ComponentType =(uint)MIXERLINE_COMPONENTTYPE.DST_SPEAKERS;
mmresult = mixerGetLineInfo(_hMixer, ref lineInfo, MIXER_OBJECTF.HMIXER
, MIXER_GETLINEINFOF.COMPONENTTYPE);
IntPtr ctlPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(new MIXERCONTROL()));
MIXERLINECONTROLS ctlParam = new MIXERLINECONTROLS();
ctlParam.StructSize = (uint)Marshal.SizeOf(new MIXERLINECONTROLS());
ctlParam.LineID = lineInfo.dwLineID;
ctlParam.ControlType = MIXERCONTROL_CONTROLTYPE.MUTE;
ctlParam.Controls = 1;
ctlParam.MixerControlItemSize = (uint)Marshal.SizeOf(new MIXERCONTROL());
ctlParam.MixerControlArray = ctlPtr;
mmresult = mixerGetLineControls(_hMixer, ref ctlParam, MIXER_OBJECTF.HMIXER
, MIXER_GETLINECONTROLSF.ONEBYTYPE);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
Marshal.FreeCoTaskMem(ctlPtr);
throw new MixerException("mixerGetLineControls", mmresult);
}
MIXERCONTROL muteCtrl = (MIXERCONTROL)Marshal.PtrToStructure(ctlPtr, typeof(MIXERCONTROL));
_muteID = muteCtrl.ControlID;
ctlParam.ControlType = MIXERCONTROL_CONTROLTYPE.VOLUME;
//他の値は再利用。まだMarshal.FreeCoTaskMemを呼んではいけない
mmresult = mixerGetLineControls(_hMixer, ref ctlParam, MIXER_OBJECTF.HMIXER
, MIXER_GETLINECONTROLSF.ONEBYTYPE);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
Marshal.FreeCoTaskMem(ctlPtr);
throw new MixerException("mixerGetLineControls", mmresult);
}
MIXERCONTROL volCtrl = (MIXERCONTROL)Marshal.PtrToStructure(ctlPtr, typeof(MIXERCONTROL));
Marshal.FreeCoTaskMem(ctlPtr);
_volumeID = volCtrl.ControlID;
_volMax = volCtrl.Bounds.UnsignedMaximum;
_volMin = volCtrl.Bounds.UnsignedMinimum;
Debug.WriteLine(string.Format("MixerAPI constructor muteID:{0} volID:{1} volMan:{2} volMin:{3}",
_muteID, _volumeID, _volMax, _volMin));
}
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;
}
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;
}
protected static bool GetMuteControl(int hmixer, int componentType, int ctrlType, out MIXERCONTROL mxc, out bool vCurrentMute)
{
// 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_BOOLEAN du = new MIXERCONTROLDETAILS_BOOLEAN();
mxc = new MIXERCONTROL();
int rc;
bool retValue;
vCurrentMute = false;
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_BOOLEAN = Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_BOOLEAN));
pmxcd.cbStruct = sizeofMIXERCONTROLDETAILS;
pmxcd.dwControlID = mxc.dwControlID;
pmxcd.paDetails = Marshal.AllocCoTaskMem(sizeofMIXERCONTROLDETAILS_BOOLEAN);
pmxcd.cChannels = 1;
pmxcd.item = 0;
pmxcd.cbDetails = sizeofMIXERCONTROLDETAILS_BOOLEAN;
rc = mixerGetControlDetailsA(hmixer, ref pmxcd, MIXER_GETCONTROLDETAILSF_VALUE);
du = (MIXERCONTROLDETAILS_BOOLEAN)Marshal.PtrToStructure(pmxcd.paDetails, typeof(MIXERCONTROLDETAILS_BOOLEAN));
vCurrentMute = (du.fValue != 0);
return(retValue);
}
retValue = false;
return(retValue);
}
public extern static uint mixerGetLineInfo(uint hmxobj, ref MIXERLINE pmxl, uint fdwInfo);
public static extern MmResult mixerGetLineInfo(IntPtr hMixer, ref MIXERLINE mixerLine, MixerFlags dwInfoFlags);
