// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;
using STATSTG = System.Runtime.InteropServices.ComTypes.STATSTG;

namespace System.Speech.Internal.SapiInterop
{
    #region enum

    internal enum SPFILEMODE
    {
        SPFM_OPEN_READONLY = 0,
        SPFM_CREATE_ALWAYS = 3
    }

    #endregion Enum

    #region Interface

    [ComImport, Guid("BED530BE-2606-4F4D-A1C0-54C5CDA5566F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface ISpStreamFormat : IStream
    {
        // ISequentialStream Methods
        new void Read([MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1), Out] byte[] pv, int cb, IntPtr pcbRead);
        new void Write([MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1)] byte[] pv, int cb, IntPtr pcbWritten);

        // IStream Methods
        new void Seek(long dlibMove, int dwOrigin, IntPtr plibNewPosition);
        new void SetSize(long libNewSize);
        new void CopyTo(IStream pstm, long cb, IntPtr pcbRead, IntPtr pcbWritten);
        new void Commit(int grfCommitFlags);
        new void Revert();
        new void LockRegion(long libOffset, long cb, int dwLockType);
        new void UnlockRegion(long libOffset, long cb, int dwLockType);
        new void Stat(out STATSTG pstatstg, int grfStatFlag);
        new void Clone(out IStream ppstm);

        // ISpStreamFormat Methods
        void GetFormat(out Guid pguidFormatId, out IntPtr ppCoMemWaveFormatEx);
    }

    [ComImport, Guid("BED530BE-2606-4F4D-A1C0-54C5CDA5566F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface ISpStream : ISpStreamFormat
    {
        // ISequentialStream Methods
        new void Read([MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1), Out] byte[] pv, int cb, IntPtr pcbRead);
        new void Write([MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1)] byte[] pv, int cb, IntPtr pcbWritten);
        // IStream Methods
        new void Seek(long dlibMove, int dwOrigin, IntPtr plibNewPosition);
        new void SetSize(long libNewSize);
        new void CopyTo(IStream pstm, long cb, IntPtr pcbRead, IntPtr pcbWritten);
        new void Commit(int grfCommitFlags);
        new void Revert();
        new void LockRegion(long libOffset, long cb, int dwLockType);
        new void UnlockRegion(long libOffset, long cb, int dwLockType);
        new void Stat(out STATSTG pstatstg, int grfStatFlag);
        new void Clone(out IStream ppstm);
        // ISpStreamFormat Methods
        new void GetFormat(out Guid pguidFormatId, out IntPtr ppCoMemWaveFormatEx);

        // ISpStream Methods
        void SetBaseStream(IStream pStream, ref Guid rguidFormat, IntPtr pWaveFormatEx);
        void Slot14(); // void GetBaseStream(IStream ** ppStream);
        void BindToFile(string pszFileName, SPFILEMODE eMode, ref Guid pFormatId, IntPtr pWaveFormatEx, ulong ullEventInterest);
        void Close();
    }

    #endregion
}