using System.Runtime.InteropServices;

namespace SHH.CameraSdk;

/// <summary>
/// 大华 PlaySDK 核心接口封装 (play.dll)
/// </summary>
public static class DahuaPlaySDK
{
    private const string DLL_PATH = "Drivers\\Dahua\\play.dll";

    // 解码回调委托
    public delegate void DECCBFUN(int nPort, IntPtr pBuf, int nSize, ref FRAME_INFO pFrameInfo, IntPtr nUser, int nReserved2);

    [StructLayout(LayoutKind.Sequential)]
    public struct FRAME_INFO
    {
        public int nWidth;
        public int nHeight;
        public int nStamp;
        public int nType;
        public int nFrameRate;
        public uint dwFrameNum;
    }

    [DllImport(DLL_PATH)]
    public static extern bool PLAY_GetFreePort(ref int plPort);

    [DllImport(DLL_PATH)]
    public static extern bool PLAY_ReleasePort(int nPort);

    [DllImport(DLL_PATH)]
    public static extern bool PLAY_OpenStream(int nPort, IntPtr pFileHead, uint nSize, uint nBufPoolSize);

    [DllImport(DLL_PATH)]
    public static extern bool PLAY_CloseStream(int nPort);

    [DllImport(DLL_PATH)]
    public static extern bool PLAY_Play(int nPort, IntPtr hWnd);

    [DllImport(DLL_PATH)]
    public static extern bool PLAY_Stop(int nPort);

    [DllImport(DLL_PATH)]
    public static extern bool PLAY_InputData(int nPort, IntPtr pBuf, uint nSize);

    [DllImport(DLL_PATH)]
    public static extern bool PLAY_SetDecCallBack(int nPort, DECCBFUN DecCBFun);

    [DllImport(DLL_PATH)]
    public static extern bool PLAY_SetStreamOpenMode(int nPort, uint nMode);
}