海康网络摄像机调用SDK解码Java版

//播放库函数声明,PlayCtrl.dll
interface PlayCtrl extends StdCallLibrary
{
    PlayCtrl INSTANCE = (PlayCtrl) Native.loadLibrary("lib\\PlayCtrl", PlayCtrl.class);

    public static final int STREAME_REALTIME = 0;
    public static final int STREAME_FILE = 1;
    
    // 20140501, cuizhenfu@gmail.com, frame type
    public static final int T_AUDIO16 = 101;
    public static final int T_AUDIO8 = 100;
    public static final int T_UYVY = 1;
    public static final int T_YV12 = 3;
    public static final int T_RGB32 = 7;

    boolean PlayM4_GetPort(NativeLongByReference nPort);
    boolean PlayM4_OpenStream(NativeLong nPort, ByteByReference pFileHeadBuf, int nSize, int nBufPoolSize);
    boolean PlayM4_InputData(NativeLong nPort, ByteByReference pBuf, int nSize);
    boolean PlayM4_CloseStream(NativeLong nPort);
    boolean PlayM4_SetStreamOpenMode(NativeLong nPort, int nMode);
    boolean PlayM4_Play(NativeLong nPort, HWND hWnd);
    boolean PlayM4_Stop(NativeLong nPort);
    boolean PlayM4_SetSecretKey(NativeLong nPort, NativeLong lKeyType, String pSecretKey, NativeLong lKeyLen);
    
    // 20140501, cuizhenfu@gmail.com
    boolean PlayM4_SetDecCallBack(NativeLong nPort, DecCallBack decCallBack);
    boolean PlayM4_SetDecCallBackEx(NativeLong nPort, DecCallBack decCallBack, String pDest, NativeLong nDestSize);
    public static interface DecCallBack extends StdCallCallback {
         public void invoke(NativeLong nPort, ByteByReference pBuffer, NativeLong nSize, FRAME_INFO frameInfo, NativeLong nReserved1, NativeLong nReserved2);
    }
    public static class FRAME_INFO extends Structure {
            public NativeLong nWidth;                   /* 画面宽，单位像素。如果是音频数据，则为音频声道数 */
            public NativeLong nHeight;                     /* 画面高，单位像素。如果是音频数据，则为样位率 */
            public NativeLong nStamp;                           /* 时标信息，单位毫秒 */
            public NativeLong nType;                            /* 数据类型，T_AUDIO16, T_RGB32, T_YV12 */
            public NativeLong nFrameRate;                /* 编码时产生的图像帧率，如果是音频数据则为采样率 */
            public int dwFrameNum;                      /* 帧号 */
    }
}

//                 //设置解码回调函数 只解码不显示
//                 if (!playControl.PlayM4_SetDecCallBack(m_lPort.getValue(), decCallBack))
//                 {
//                     break;
//                 }

                        // 设置解码回调函数 解码且显示
                        if (!playControl.PlayM4_SetDecCallBackEx(m_lPort.getValue(), decCallBack, null, null))
                        {
                                break;
                        }

W32API.HWND hwnd = new W32API.HWND(Native.getComponentPointer(panelRealplay));

                        if (!playControl.PlayM4_Play(m_lPort.getValue(), null)) //播放开始
                        {
                            break;
                        }