mxnet2ncnn concat layer bug

[zhaolili]

mxnet2ncnn.cpp中，原始mxnet json文件没有dim attr, 转换后的ncnn param文件 axis会被设为-1， concat layer 的forward流程跳出。

//mxnet2ncnn.cpp
else if (n.op == "Concat")
{
   int dim = n.attr("dim");        //dim = 0
   fprintf(pp, " 0=%d", dim-1);
}

//concat.cpp
int Concat::load_param(const ParamDict& pd)
{
    axis = pd.get(0, 0);   //axis = -1
    return 0;
}

//concat.cpp
int Concat::forward(const std::vector<Mat>& bottom_blobs, std::vector<Mat>& top_blobs) const
{
    int dims = bottom_blobs[0].dims;
    size_t elemsize = bottom_blobs[0].elemsize;

    if (dims == 1) // axis == 0
    {
        
    }

    if (dims == 2 && axis == 0)
    {
        
    }

    if (dims == 2 && axis == 1)
    {
       
    }

    if (dims == 3 && axis == 0)
    {

    }

    if (dims == 3 && axis == 1)
    {
        
    }

    if (dims == 3 && axis == 2)
    {
        
    }

    return 0;
}

[nihui]

f4f5a96