SafeDispatch/MotoTrbo_GW/AudioDeviceName.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Collections;

namespace MotoTRBO_GW
{
    class AudioDeviceName
    {
        private const int MAXPNAMELEN = 122;

        [StructLayout(LayoutKind.Sequential, Pack = 4)]
        public struct WaveInCaps
        {
            public short wMid;
            public short wPid;
            public int vDriverVersion;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAXPNAMELEN)]
            public string szPname;
            public int dwFormats;
            public short wChannels;
            public short wReserved1;
        }
        [DllImport("winmm.dll")]
        public static extern int waveInGetNumDevs();

        [DllImport("winmm.dll")]
        public static extern int waveOutGetNumDevs();

        [DllImport("winmm.dll", EntryPoint = "waveInGetDevCaps")]
        public static extern int waveInGetDevCapsA(int uDeviceID, ref WaveInCaps lpCaps, int uSize);

        [DllImport("winmm.dll", EntryPoint = "waveOutGetDevCaps")]
        public static extern int waveOutGetDevCapsA(int uDeviceID, ref WaveInCaps lpCaps, int uSize);

        ArrayList arrLst = new ArrayList();

        public int Count
        {            
            get {return arrLst.Count;}
        }

        public string this[int indexer]
        {
            get{return (string)arrLst[indexer];}
        }

        public AudioDeviceName()
        {
        }

        private String trimHi(String s) 
        {
            int index = s.IndexOf("(Hi");
            if (index >= 0)
            {
                return s.Substring(0, index);
            }
            else
            {
                return s;
            }
        }

        public ArrayList getInDevices()
        {
            ArrayList arrLst = new ArrayList();
            int waveInDevicesCount = waveInGetNumDevs();
            if (waveInDevicesCount > 0)
            {
                for (int uDeviceID = 0; uDeviceID < waveInDevicesCount; uDeviceID++)
                {
                    WaveInCaps waveInCaps = new WaveInCaps();
                    waveInGetDevCapsA(uDeviceID, ref waveInCaps, Marshal.SizeOf(typeof(WaveInCaps)));
                    arrLst.Add(trimHi(waveInCaps.szPname));
                }
            }
            return arrLst;
        }


        public ArrayList getOutDevices()
        {
            ArrayList arrLst = new ArrayList();
            int waveOutDevicesCount = waveOutGetNumDevs();
            if (waveOutDevicesCount > 0)
            {
                for (int uDeviceID = 0; uDeviceID < waveOutDevicesCount; uDeviceID++)
                {
                    WaveInCaps waveInCaps = new WaveInCaps();
                    waveOutGetDevCapsA(uDeviceID, ref waveInCaps, Marshal.SizeOf(typeof(WaveInCaps)));
                    arrLst.Add(trimHi(waveInCaps.szPname));
                }
            }
            return arrLst;
        }
    }
}