EasyDarwin开源云平台接入海康威视EasyCamera摄像机之快照获取与上传

本文转自EasyDarwin团队成员Alex的博客：http://blog.csdn.net/cai6811376

EasyCamera开源摄像机拥有获取摄像机实时快照并上传至EasyDarwin云平台的功能，那么我们如何使用海康的摄像机SDK获取实时快照呢？

我们看海康SDK的说明文档中有

这里写图片描述

我们使用这个接口进行快照获取

//EasyCamera-HK EasyCameraSource.cpp
bool EasyCameraSource::getSnapData(unsigned char* pBuf, UInt32 uBufLen, int* uSnapLen)
{
    //如果摄像机未登录，返回false
    if (!cameraLogin()) return false;

    //调用SDK获取数据
    LPNET_DVR_JPEGPARA jpegPara = new NET_DVR_JPEGPARA;
    jpegPara->wPicQuality = 0;
    jpegPara->wPicSize = 9;

    LPDWORD Ret = 0;

    NET_DVR_SetCapturePictureMode(JPEG_MODE);
    /*{
        cout << "Set Capture Picture Mode error!" << endl;
        cout << "The error code is " << NET_DVR_GetLastError() << endl;
    }*/

    bool capture = NET_DVR_CaptureJPEGPicture_NEW(m_u32Handle, 1, jpegPara, (char*)pBuf, uBufLen, (LPDWORD)uSnapLen);
    if (!capture)
    {
        printf("Error: NET_DVR_CaptureJPEGPicture_NEW = %d", NET_DVR_GetLastError());
        delete jpegPara;
        return false;
    }

    delete jpegPara;
    return true;
}