海康OSD添加获取及清除

函数

NET_DVR_SHOWSTRING_V30 // OSD信息集
NET_DVR_GetDVRConfig// 获取
NET_DVR_SetDVRConfig// 设置

添加

    /**
     * 设置 OSD 字符叠加参数
     *
     * @param iUserID  loginId
     * @param iChan    通道号
     * @param contents 内容
     */
    public static void SetOSDString(int iUserID, int iChan, String[] contents) throws UnsupportedEncodingException {
        if (iUserID < 0) return;
        if (null == contents || contents.length <= 0) return;

        NET_DVR_SHOWSTRING_V30 cfg = new NET_DVR_SHOWSTRING_V30();
        if (!HCNetSDK.getInstance().NET_DVR_GetDVRConfig(iUserID, HCNetSDK.NET_DVR_GET_SHOWSTRING_V30, iChan, cfg)) {
            System.out.println("NET_DVR_GET_SHOWSTRING_V30 faild!" + " err: " + HCNetSDK.getInstance().NET_DVR_GetLastError());
            return;
        } else {
            System.out.println("NET_DVR_GET_SHOWSTRING_V30 succ!");
        }


        int iIndex = 0;
        for (int i = 0; i < contents.length; i++) {
            if ("".equals(contents[i]))
                continue;
            if (iIndex >= cfg.struStringInfo.length)//防止超限
                break;

            byte[] tempBytes = new byte[128];
            byte[] osd = contents[i].getBytes("GBK");
            System.arraycopy(osd, 0, tempBytes, 0, osd.length);
            cfg.struStringInfo[iIndex].wShowString = 1;//1为显示，0为不显示
            cfg.struStringInfo[iIndex].sString = tempBytes;//叠加的字符串
            cfg.struStringInfo[iIndex].wStringSize = osd.length;//字符串大小
            // 显示范围704*576
            cfg.struStringInfo[iIndex].wShowStringTopLeftX = 550;//坐标x
            cfg.struStringInfo[iIndex].wShowStringTopLeftY = 50 + (iIndex * 38);//坐标y
            iIndex++;
        }
        HCNetSDK.getInstance().NET_DVR_SetDVRConfig(iUserID, HCNetSDK.NET_DVR_SET_SHOWSTRING_V30, iChan, cfg);
    }

获取

    /**
     * 获取 OSD 字符叠加参数
     *
     * @param iUserID loginId
     * @param iChan   通道号
     */
    public static String[] GetOSDString(int iUserID, int iChan) throws UnsupportedEncodingException {

        if (iUserID < 0) return null;
        NET_DVR_SHOWSTRING_V30 cfg = new NET_DVR_SHOWSTRING_V30();
        if (!HCNetSDK.getInstance().NET_DVR_GetDVRConfig(iUserID, HCNetSDK.NET_DVR_GET_SHOWSTRING_V30, iChan, cfg)) {
            System.out.println("NET_DVR_GET_SHOWSTRING_V30 faild!" + " err: " + HCNetSDK.getInstance().NET_DVR_GetLastError());
            return null;
        }
        System.out.println("NET_DVR_GET_SHOWSTRING_V30 succ!");

        String[] OSDStrings = new String[cfg.struStringInfo.length];
        for (int i = 0; i < cfg.struStringInfo.length; i++) {
            if (cfg.struStringInfo[i].wShowString == 1) {
                OSDStrings[i] = new String(cfg.struStringInfo[i].sString, "GBK");
            }
        }
        return OSDStrings;
    }

清除

    /**
     * 清除OSD
     *
     * @param iUserID loginId
     * @param iChan   通道号
     */
    public static void ClearOSD(int iUserID, int iChan) {
        if (iUserID < 0) return;
        NET_DVR_SHOWSTRING_V30 cfg = new NET_DVR_SHOWSTRING_V30();
        if (!HCNetSDK.getInstance().NET_DVR_GetDVRConfig(iUserID, HCNetSDK.NET_DVR_GET_SHOWSTRING_V30, iChan, cfg)) {
            System.out.println("NET_DVR_GET_SHOWSTRING_V30 faild!" + " err: " + HCNetSDK.getInstance().NET_DVR_GetLastError());
            return;
        } else {
            System.out.println("NET_DVR_GET_SHOWSTRING_V30 succ!");
        }

        for (int i = 0; i < cfg.struStringInfo.length; i++) {
            cfg.struStringInfo[i].wShowString = 0;//1为显示，0为不显示
        }
        HCNetSDK.getInstance().NET_DVR_SetDVRConfig(iUserID, HCNetSDK.NET_DVR_SET_SHOWSTRING_V30, iChan, cfg);
    }

使用及注意

单行字符的长度，不能大于44 个字符
获取字符时，注意空字符及编解码问题，获取到的字符集是填满的
注意判断边界，防止越界异常

添加OSD

String[] content = new String[3];
content[0] = "test1: 123";
content[1] = "测试2: 我真帅";
content[2] = "it's three";
try {
    DevOSDConfig.SetOSDString(VideoFragment.m_iUserID, 1, content);
} catch (UnsupportedEncodingException e) {
    e.printStackTrace();
}

获取OSD

try {
    String[] strings = DevOSDConfig.GetOSDString(VideoFragment.m_iUserID, 1);
    if (strings != null && strings.length > 0)
        for (String string : strings) {
            if (string != null && !string.isEmpty()) {
                L.e(string.trim());
            }
        }

} catch (UnsupportedEncodingException e) {
    e.printStackTrace();
}

清除OSD

DevOSDConfig.ClearOSD(VideoFragment.m_iUserID, 1);