U
    (d.                     @   s   d dl mZmZmZmZ d dlZd dlmZmZ dee eedddZ	ee eddd	Z
eeee f d
ddZdejeee  eee ee f dddZeedddZeedddZejejeejejf dddZdS )    )ListOptionalTupleUnionN)nnTensor)tensorsdimreturnc                 C   s    t | dkr| d S t| |S )zg
    Efficient version of torch.cat that avoids a copy if there is only a single element in a list
       r   )lentorchcat)r   r	    r   :/tmp/pip-unpacked-wheel-vx7f76es/torchvision/ops/_utils.py_cat   s    r   )boxesr
   c              	   C   sp   t dd | D dd}g }t| D ]*\}}|t|d d d df | q"t |dd}tj||gdd}|S )Nc                 S   s   g | ]}|qS r   r   ).0br   r   r   
<listcomp>   s     z/convert_boxes_to_roi_format.<locals>.<listcomp>r   r	   r   )r   	enumerateappendr   Z	full_liker   )r   Zconcat_boxestempir   idsZroisr   r   r   convert_boxes_to_roi_format   s    $r   )r   c                 C   sd   t | ttfr0| D ]}t|ddkd qn0t | tjrTt| ddkd ntdd d S )Nr      zNThe shape of the tensor in the boxes list is not correct as List[Tensor[L, 4]]   z5The boxes tensor shape is not correct as Tensor[K, 5]Fz>boxes is expected to be a Tensor[L, 5] or a List[Tensor[K, 4]])
isinstancelisttupler   Z_assertsizer   )r   Z_tensorr   r   r   check_roi_boxes_shape   s     r#   )modelnorm_classesr
   c                 C   s   |s$t jjjt jt jt jjjt jg}|D ] }t	|t j
s(td| dq(t|}g }g }|  D ]l}t| d r|dd |jddD  qbt||r|dd | D  qb|dd | D  qb||fS )	NzClass z  is not a subclass of nn.Module.c                 s   s   | ]}|j r|V  qd S NZrequires_gradr   pr   r   r   	<genexpr>@   s      z-split_normalization_params.<locals>.<genexpr>F)Zrecursec                 s   s   | ]}|j r|V  qd S r&   r'   r(   r   r   r   r*   B   s      c                 s   s   | ]}|j r|V  qd S r&   r'   r(   r   r   r   r*   D   s      )r   modulesZ	batchnormZ
_BatchNormZ	LayerNormZ	GroupNormZinstancenormZ_InstanceNormZLocalResponseNorm
issubclassModule
ValueErrorr!   nextchildrenextend
parametersr   )r$   r%   tclassesZnorm_paramsZother_paramsmoduler   r   r   split_normalization_params)   s(    
r6   )r3   r
   c                 C   sH   |   r&| jtjtjfkr| S |  S | jtjtjfkr<| S |  S d S r&   )	Zis_floating_pointdtyper   float32float64floatZint32Zint64intr3   r   r   r   _upcastH   s    r=   c                 C   s   | j tjtjfkr|  S | S r&   )r7   r   r8   r9   r:   r<   r   r   r   _upcast_non_floatP   s    r>   )boxes1boxes2r
   c                 C   s   | j dd\}}}}|j dd\}}}}	t||}
t||}t||}t||	}t|}||k||
k@ }|| |
|  || ||   ||< || ||  || |	|   | }||fS )Nr   )Zunbindr   maxminZ
zeros_like)r?   r@   x1y1Zx2y2Zx1gZy1gZx2gZy2gZxkis1Zykis1Zxkis2Zykis2ZintsctkmaskZunionkr   r   r   _loss_inter_unionW   s    
$$rH   )r   )N)typingr   r   r   r   r   r   r   r;   r   r   r#   r-   typer6   r=   r>   rH   r   r   r   r   <module>   s"   
  
