using System;
using System.Runtime.InteropServices;

namespace NAudio.CoreAudioApi.Interfaces
{
    /// <summary>
    /// IMMNotificationClient
    /// </summary>
    [Guid("7991EEC9-7E89-4D85-8390-6C703CEC60C0"), 
        InterfaceType(ComInterfaceType.InterfaceIsIUnknown),
        ComImport]
    public interface IMMNotificationClient
    {
        /// <summary>
        /// Device State Changed
        /// </summary>
        void OnDeviceStateChanged([MarshalAs(UnmanagedType.LPWStr)] string deviceId, [MarshalAs(UnmanagedType.I4)] DeviceState newState);

        /// <summary>
        /// Device Added
        /// </summary>
        void OnDeviceAdded([MarshalAs(UnmanagedType.LPWStr)] string pwstrDeviceId);

        /// <summary>
        /// Device Removed
        /// </summary>
        void OnDeviceRemoved([MarshalAs(UnmanagedType.LPWStr)] string deviceId);

        /// <summary>
        /// Default Device Changed
        /// </summary>
        void OnDefaultDeviceChanged(DataFlow flow, Role role, [MarshalAs(UnmanagedType.LPWStr)] string defaultDeviceId);

        /// <summary>
        /// Property Value Changed
        /// </summary>
        /// <param name="pwstrDeviceId"></param>
        /// <param name="key"></param>
        void OnPropertyValueChanged([MarshalAs(UnmanagedType.LPWStr)] string pwstrDeviceId, PropertyKey key);
    }

}