public static IList <MixerControl> GetMixerControls(IntPtr mixerHandle, MixerLine mixerLine, MixerFlags mixerHandleType)
{
List <MixerControl> list = new List <MixerControl>();
if (mixerLine.ControlsCount > 0)
{
int num = Marshal.SizeOf(typeof(MixerInterop.MIXERCONTROL));
MixerInterop.MIXERLINECONTROLS mIXERLINECONTROLS = default(MixerInterop.MIXERLINECONTROLS);
IntPtr intPtr = Marshal.AllocHGlobal(num * mixerLine.ControlsCount);
mIXERLINECONTROLS.cbStruct = Marshal.SizeOf(mIXERLINECONTROLS);
mIXERLINECONTROLS.dwLineID = mixerLine.LineId;
mIXERLINECONTROLS.cControls = mixerLine.ControlsCount;
mIXERLINECONTROLS.pamxctrl = intPtr;
mIXERLINECONTROLS.cbmxctrl = Marshal.SizeOf(typeof(MixerInterop.MIXERCONTROL));
try
{
MmResult mmResult = MixerInterop.mixerGetLineControls(mixerHandle, ref mIXERLINECONTROLS, MixerFlags.Mixer | mixerHandleType);
if (mmResult != MmResult.NoError)
{
throw new MmException(mmResult, "mixerGetLineControls");
}
for (int i = 0; i < mIXERLINECONTROLS.cControls; i++)
{
MixerInterop.MIXERCONTROL mIXERCONTROL = (MixerInterop.MIXERCONTROL)Marshal.PtrToStructure((IntPtr)(intPtr.ToInt64() + (long)(num * i)), typeof(MixerInterop.MIXERCONTROL));
MixerControl item = MixerControl.GetMixerControl(mixerHandle, mixerLine.LineId, mIXERCONTROL.dwControlID, mixerLine.Channels, mixerHandleType);
list.Add(item);
}
}
finally
{
Marshal.FreeHGlobal(intPtr);
}
}
return(list);
}
public static MixerControl GetMixerControl(IntPtr mixerHandle, int nLineID, int controlId, int nChannels, MixerFlags mixerFlags)
{
MixerInterop.MIXERLINECONTROLS mIXERLINECONTROLS = default(MixerInterop.MIXERLINECONTROLS);
MixerInterop.MIXERCONTROL mIXERCONTROL = default(MixerInterop.MIXERCONTROL);
IntPtr intPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(mIXERCONTROL));
mIXERLINECONTROLS.cbStruct = Marshal.SizeOf(mIXERLINECONTROLS);
mIXERLINECONTROLS.cControls = 1;
mIXERLINECONTROLS.dwControlID = controlId;
mIXERLINECONTROLS.cbmxctrl = Marshal.SizeOf(mIXERCONTROL);
mIXERLINECONTROLS.pamxctrl = intPtr;
mIXERLINECONTROLS.dwLineID = nLineID;
MmResult mmResult = MixerInterop.mixerGetLineControls(mixerHandle, ref mIXERLINECONTROLS, MixerFlags.ListText | mixerFlags);
if (mmResult != MmResult.NoError)
{
Marshal.FreeCoTaskMem(intPtr);
throw new MmException(mmResult, "mixerGetLineControls");
}
mIXERCONTROL = (MixerInterop.MIXERCONTROL)Marshal.PtrToStructure(mIXERLINECONTROLS.pamxctrl, typeof(MixerInterop.MIXERCONTROL));
Marshal.FreeCoTaskMem(intPtr);
if (MixerControl.IsControlBoolean(mIXERCONTROL.dwControlType))
{
return(new BooleanMixerControl(mIXERCONTROL, mixerHandle, mixerFlags, nChannels));
}
if (MixerControl.IsControlSigned(mIXERCONTROL.dwControlType))
{
return(new SignedMixerControl(mIXERCONTROL, mixerHandle, mixerFlags, nChannels));
}
if (MixerControl.IsControlUnsigned(mIXERCONTROL.dwControlType))
{
return(new UnsignedMixerControl(mIXERCONTROL, mixerHandle, mixerFlags, nChannels));
}
if (MixerControl.IsControlListText(mIXERCONTROL.dwControlType))
{
return(new ListTextMixerControl(mIXERCONTROL, mixerHandle, mixerFlags, nChannels));
}
if (MixerControl.IsControlCustom(mIXERCONTROL.dwControlType))
{
return(new CustomMixerControl(mIXERCONTROL, mixerHandle, mixerFlags, nChannels));
}
throw new InvalidOperationException(string.Format("Unknown mixer control type {0}", mIXERCONTROL.dwControlType));
}