Function MNNSamplerNV21Nearest

source/backend/cpu/compute/ImageProcessFunction.cpp:946–968

}

void MNNSamplerNV21Nearest(const unsigned char* source, unsigned char* dest, MNN::CV::Point* points, size_t sta,
                           size_t count, size_t capacity, size_t iw, size_t ih, size_t yStride) {
    auto srcY  = source;

    auto dstY  = dest + sta;
    auto dstUV = dest + (capacity) + (sta / 2) * 2;
    auto stride = yStride;
    if (yStride == 0) {
        stride = iw;
    }
    auto srcUV = source + stride * ih;
    MNNSamplerC1Nearest(srcY, dstY, points, 0, count, capacity, iw, ih, stride);

    MNN::CV::Point uvPoints[2];
    uvPoints[0].fX = (points[0].fX - 0.01f) / 2.0f;
    uvPoints[0].fY = (points[0].fY - 0.01f) / 2.0f;
    uvPoints[1].fX = points[1].fX;
    uvPoints[1].fY = points[1].fY;
    if (yStride == 0) {
        stride =  ((iw + 1) / 2) * 2;
    }
    MNNSamplerNearest(srcUV, dstUV, uvPoints, 0, (count + 1) / 2, (iw + 1) / 2, (ih + 1) / 2, stride, 2);
}

static void _swapUV(const unsigned char* source, unsigned char* dest, size_t countC2) {
    int sta = 0;