public MixerInfo GetMixerControls() { MIXERLINE mxl = new MIXERLINE(); MIXERLINECONTROLS mlc = new MIXERLINECONTROLS(); mxl.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERLINE)); mlc.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERLINECONTROLS)); WinMNWarpConstants.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)); WinMNWarpConstants.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); }
internal static extern uint mixerGetLineInfo(IntPtr hmxobj, ref MIXERLINE pmxl, MIXER flags);