/// <summary>Return the info for a mixer line component</summary>
public MixerLine LineInfo(EMixerLineComponentType line_component_type)
{
MixerLine line = MixerLine.New; line.dwComponentType = (uint)line_component_type;
Check(mixerGetLineInfoA(Handle, ref line, (uint)EMixerGetLineInfoFlag.COMPONENTTYPE));
return(line);
}
/// <summary>Retrieve mixer data</summary>
public MixerControl LineControl(EMixerLineComponentType line_component_type, EMixerCtrlType ctrl_type)
{
uint mixer_data_size = (uint)Marshal.SizeOf(typeof(MixerControl));
MixerLine line = LineInfo(line_component_type);
MixerLineControls line_ctrls = MixerLineControls.New;
line_ctrls.pamxctrl = Marshal.AllocCoTaskMem((int)mixer_data_size);
line_ctrls.dwLineID = line.dwLineID;
line_ctrls.dwControlType = (uint)ctrl_type;
line_ctrls.cControls = 1;
line_ctrls.cbmxctrl = mixer_data_size;
Check(mixerGetLineControlsA(Handle, ref line_ctrls, (uint)EMixerGetLineControlsFlag.ONEBYTYPE));
return((MixerControl?)Marshal.PtrToStructure(line_ctrls.pamxctrl, typeof(MixerControl)) ?? throw new NullReferenceException($"Null returned for WinMM MixerControl"));
}