Canon EDSDK Liveview的示例C代码？

这将分别为您提供指向JPEG流开头和大小的指针.

一旦你有这个使用LibJPEG Turbo解压缩,Libjpeg只是不够快.

解压缩后,可以使用opencv显示图像.

bool CanonCamera::downloadLiveViewImage()
{
    EdsError err = EDS_ERR_OK;
    EdsEvfImageRef image = NULL;
    EdsStreamRef stream = NULL;
    unsigned char* data = NULL;
    unsigned long size = 0;

    err = EdsCreateMemoryStream(0,&stream);

    if (err != EDS_ERR_OK) {
        cout << "Download Live View Image Error in Function EdsCreateMemoryStream: " << err << "\n";
        return false;
    }

    err = EdsCreateEvfImageRef(stream,&imagE);

    if (err != EDS_ERR_OK) {
        cout << "Download Live View Image Error in Function EdsCreateEvfImageRef: " << err << "\n";
        return false;

    }

    err = EdsDownloadEvfImage(cameraRef,imagE);

    if (err != EDS_ERR_OK) {
        cout << "Download Live View Image Error in Function EdsDownloadEvfImage: " << err << "\n";
        return false;
    }

    err = EdsGetPointer(stream,(Edsvoid**)& data);

    if (err != EDS_ERR_OK) {
        cout << "Download Live View Image Error in Function EdsGetPointer: " << err << "\n";
        return false;
    }

    err = EdsGetLength(stream,&sizE);

    if (err != EDS_ERR_OK) {
        cout << "Download Live View Image Error in Function EdsGetLength: " << err << "\n";
        return false;
    }

    // libjpegTurbo(data,sizE);
    // display RGB image in opencv

    if (stream != NULL) {
        EdsRelease(stream);
        stream = NULL;
    }

    if (image != NULL) {            
        EdsRelease(imagE);
        image = NULL;
    }

    data = NULL;
    return true;
}