o ϯi@svddlmZmZddlZddlmZddlmZddlm Z Gdddej Z Gdddej Z Gd d d ej Z dS) )ListOptionalN)set_attributes)init_net_weightscsBeZdZdZdejddffdd Zdejdejfdd Z Z S) Netug Build a general Net models with a list of blocks for video recognition. :: Input ↓ Block 1 ↓ . . . ↓ Block N ↓ The ResNet builder can be found in `create_resnet`. blocksreturnNcs(t|dus J||_t|dS)z] Args: blocks (torch.nn.module_list): the list of block modules. N)super__init__rr)selfr __class__K/home/ubuntu/.local/lib/python3.10/site-packages/pytorchvideo/models/net.pyr s   z Net.__init__xcCs&tt|jD] }|j||}q|S)N)rangelenr)r ridxrrrforward)sz Net.forward) __name__ __module__ __qualname____doc__nn ModuleListr torchTensorr __classcell__rrr rr s rcsDeZdZdZdejdejffdd Zdejdejfdd Z Z S) DetectionBBoxNetworkzO A general purpose model that handles bounding boxes as part of input. modeldetection_headcst||_||_dS)z Args: model (nn.Module): a model that preceeds the head. Ex: stem + stages. detection_head (nn.Module): a network head. that can take in input bounding boxes and the outputs from the model. N)r r rr )r rr r rrr 4s  zDetectionBBoxNetwork.__init__rbboxescCs(||}|||}||jddS)aC Args: x (torch.tensor): input tensor bboxes (torch.tensor): accociated bounding boxes. The format is N*5 (Index, X_1,Y_1,X_2,Y_2) if using RoIAlign and N*6 (Index, x_ctr, y_ctr, width, height, angle_degrees) if using RoIAlignRotated. r)rr viewshape)r rr!featuresoutrrrr?s zDetectionBBoxNetwork.forward) rrrrrModuler rrrrrrr rr/s rc s^eZdZdZdddejdeejdeeddffd d Z d e e j de j fd d Z ZS)MultiPathWayWithFuseu Build multi-pathway block with fusion for video recognition, each of the pathway contains its own Blocks and Fusion layers across different pathways. :: Pathway 1 ... Pathway N ↓ ↓ Block 1 Block N ↓⭠ --Fusion----↓ T)inplacemultipathway_blocksmultipathway_fusionr)rNcstt|tdS)a Args: multipathway_blocks (nn.module_list): list of models from all pathways. multipathway_fusion (nn.module): fusion model. inplace (bool): If inplace, directly update the input list without making a copy. N)r r rlocals)r r*r+r)r rrr Zs zMultiPathWayWithFuse.__init__rcCs|t|ts Jd|jr|}ndgt|}tt|jD]}|j|dur1|j|||||<q|jdur<||}|S)Nzs   $