ncnn rotation

Way one:

Bitmap bitmap = BitmapFactory.decodeFile("/mnt/sdcard/test.jpeg");
Tracker.covert(bitmap);

JNIEXPORT void JNICALL
Java_com_xx_Tracker_covert(JNIEnv *env, jclass clazz, jobject jbitmap) {
    
    
    void* data;

    if (AndroidBitmap_lockPixels(env, jbitmap, &data) < 0) loge(tag, "AndroidBitmap_lockPixels error");
    AndroidBitmapInfo bitmapInfo;
    AndroidBitmap_getInfo(env, jbitmap, &bitmapInfo);

    int outw = bitmapInfo.height;
    int outh = bitmapInfo.width;

    cv::Mat in(outw, outh, CV_8UC4, data);
    cvtColor(in, in, CV_RGBA2BGR);
//    cvtColor(in, in, cv::COLOR_RGBA2BGR);
    cv::Mat out(outh, outw, CV_8UC4);

    ncnn::kanna_rotate_c3((const unsigned char*)in.data, bitmapInfo.width, bitmapInfo.height, out.data, outw, outh, 6);//Rotation 90
    ncnn::Mat m = ncnn::Mat::from_pixels(out.data, ncnn::Mat::PIXEL_BGR2BGRA, out.cols, out.rows);//cv mat -> ncnn mat
//    ncnn::Mat m = ncnn::Mat::from_pixels(out.data, ncnn::Mat::PIXEL_RGBA2BGR, out.cols, out.rows);//cv mat -> ncnn mat

    cv::Mat tmp = ncnn_debug(m);
    cv::imwrite("/mnt/sdcard/pic.jpg", tmp);
    AndroidBitmap_unlockPixels(env, jbitmap);
}

Way two:

    cv::Mat in = cv::imread("/sdcard/test.jpeg");
    int w = in.cols;
    int h = in.rows;
    // rotate from 7 to 1
    int outw = h;
    int outh = w;
    cv::Mat out(outh, outw, CV_8UC4);

    ncnn::kanna_rotate_c3((const unsigned char*)in.data, w, h, out.data, outw, outh, 6);//Rotation 90
    ncnn::Mat m = ncnn::Mat::from_pixels(out.data, ncnn::Mat::PIXEL_BGR, out.cols, out.rows);//cv mat -> ncnn mat
    cv::Mat tmp = ncnn_debug(m);
    cv::imwrite("/mnt/sdcard/pic.jpg", tmp);

Common:

cv::Mat ncnn_debug(ncnn::Mat& ncnn_img)
{
    
    
    cv::Mat imageDate(ncnn_img.h, ncnn_img.w, CV_8UC3);
    for (int c = 0; c < 3; c++) {
    
    
        for (int i = 0; i < ncnn_img.h; i++)
        {
    
    
            for (int j = 0; j < ncnn_img.w; j++)
            {
    
    
                float t = ((float*)ncnn_img.data)[j + i * ncnn_img.w + c * ncnn_img.h * ncnn_img.w];
                imageDate.data[(2 - c) + j * 3 + i * ncnn_img.w * 3] = t;
            }
        }
    }

    return imageDate;
}