_base_ = ['mmdet3d::_base_/default_runtime.py']
custom_imports = dict(
    imports=['projects.BEVFusion.bevfusion'], allow_failed_imports=False)

# model settings
# Voxel size for voxel encoder
# Usually voxel size is changed consistently with the point cloud range
# If point cloud range is modified, do remember to change all related
# keys in the config.
voxel_size = [0.075, 0.075, 0.2]
point_cloud_range = [-54.0, -54.0, -5.0, 54.0, 54.0, 3.0]
class_names = [
    'car', 'truck', 'construction_vehicle', 'bus', 'trailer', 'barrier',
    'motorcycle', 'bicycle', 'pedestrian', 'traffic_cone'
]

metainfo = dict(classes=class_names)
dataset_type = 'NuScenesDataset'
data_root = 'data/nuscenes/'
data_prefix = dict(
    pts='samples/LIDAR_TOP',
    CAM_FRONT='samples/CAM_FRONT',
    CAM_FRONT_LEFT='samples/CAM_FRONT_LEFT',
    CAM_FRONT_RIGHT='samples/CAM_FRONT_RIGHT',
    CAM_BACK='samples/CAM_BACK',
    CAM_BACK_RIGHT='samples/CAM_BACK_RIGHT',
    CAM_BACK_LEFT='samples/CAM_BACK_LEFT',
    sweeps='sweeps/LIDAR_TOP')
input_modality = dict(use_lidar=True, use_camera=True)
file_client_args = dict(backend='disk')

model = dict(
    type='BEVFusion',
    data_preprocessor=dict(
        type='Det3DDataPreprocessor',
        mean=[123.675, 116.28, 103.53],
        std=[58.395, 57.12, 57.375],
        bgr_to_rgb=False,
        pad_size_divisor=32,
        voxelize_cfg=dict(
            max_num_points=10,
            point_cloud_range=[-54.0, -54.0, -5.0, 54.0, 54.0, 3.0],
            voxel_size=[0.075, 0.075, 0.2],
            max_voxels=[120000, 160000],
            voxelize_reduce=True)),
    img_backbone=dict(
        type='mmdet.SwinTransformer',
        embed_dims=96,
        depths=[2, 2, 6, 2],
        num_heads=[3, 6, 12, 24],
        window_size=7,
        mlp_ratio=4,
        qkv_bias=True,
        qk_scale=None,
        drop_rate=0.0,
        attn_drop_rate=0.0,
        drop_path_rate=0.2,
        patch_norm=True,
        out_indices=[1, 2, 3],
        with_cp=False,
        convert_weights=True,
        init_cfg=dict(
            type='Pretrained',
            checkpoint=  # noqa: E251
            'https://github.com/SwinTransformer/storage/releases/download/v1.0.0/swin_tiny_patch4_window7_224.pth'  # noqa: E501
        )),
    img_neck=dict(
        type='GeneralizedLSSFPN',
        in_channels=[192, 384, 768],
        out_channels=256,
        start_level=0,
        num_outs=3,
        norm_cfg=dict(type='BN2d', requires_grad=True),
        act_cfg=dict(type='ReLU', inplace=True),
        upsample_cfg=dict(mode='bilinear', align_corners=False)),
    vtransform=dict(
        type='DepthLSSTransform',
        in_channels=256,
        out_channels=80,
        image_size=[256, 704],
        feature_size=[32, 88],
        xbound=[-54.0, 54.0, 0.3],
        ybound=[-54.0, 54.0, 0.3],
        zbound=[-10.0, 10.0, 20.0],
        dbound=[1.0, 60.0, 0.5],
        downsample=2),
    pts_voxel_encoder=dict(type='HardSimpleVFE', num_features=5),
    pts_middle_encoder=dict(
        type='BEVFusionSparseEncoder',
        in_channels=5,
        sparse_shape=[1440, 1440, 41],
        order=('conv', 'norm', 'act'),
        norm_cfg=dict(type='SyncBN', eps=0.001, momentum=0.01),
        encoder_channels=((16, 16, 32), (32, 32, 64), (64, 64, 128), (128,
                                                                      128)),
        encoder_paddings=((0, 0, 1), (0, 0, 1), (0, 0, (1, 1, 0)), (0, 0)),
        block_type='basicblock'),
    fusion_layer=dict(
        type='ConvFuser', in_channels=[80, 256], out_channels=256),
    pts_backbone=dict(
        type='SECOND',
        in_channels=256,
        out_channels=[128, 256],
        layer_nums=[5, 5],
        layer_strides=[1, 2],
        norm_cfg=dict(type='SyncBN', eps=0.001, momentum=0.01),
        conv_cfg=dict(type='Conv2d', bias=False)),
    pts_neck=dict(
        type='SECONDFPN',
        in_channels=[128, 256],
        out_channels=[256, 256],
        upsample_strides=[1, 2],
        norm_cfg=dict(type='SyncBN', eps=0.001, momentum=0.01),
        upsample_cfg=dict(type='deconv', bias=False),
        use_conv_for_no_stride=True),
    bbox_head=dict(
        type='TransFusionHead',
        num_proposals=200,
        auxiliary=True,
        in_channels=512,
        hidden_channel=128,
        num_classes=10,
        nms_kernel_size=3,
        bn_momentum=0.1,
        num_decoder_layers=1,
        decoder_layer=dict(
            type='TransformerDecoderLayer',
            self_attn_cfg=dict(embed_dims=128, num_heads=8, dropout=0.1),
            cross_attn_cfg=dict(embed_dims=128, num_heads=8, dropout=0.1),
            ffn_cfg=dict(
                embed_dims=128,
                feedforward_channels=256,
                num_fcs=2,
                ffn_drop=0.1,
                act_cfg=dict(type='ReLU', inplace=True),
            ),
            norm_cfg=dict(type='LN'),
            pos_encoding_cfg=dict(input_channel=2, num_pos_feats=128)),
        train_cfg=dict(
            dataset='nuScenes',
            point_cloud_range=[-54.0, -54.0, -5.0, 54.0, 54.0, 3.0],
            grid_size=[1440, 1440, 41],
            voxel_size=[0.075, 0.075, 0.2],
            out_size_factor=8,
            gaussian_overlap=0.1,
            min_radius=2,
            pos_weight=-1,
            code_weights=[1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 0.2, 0.2],
            assigner=dict(
                type='HungarianAssigner3D',
                iou_calculator=dict(type='BboxOverlaps3D', coordinate='lidar'),
                cls_cost=dict(
                    type='mmdet.FocalLossCost',
                    gamma=2.0,
                    alpha=0.25,
                    weight=0.15),
                reg_cost=dict(type='BBoxBEVL1Cost', weight=0.25),
                iou_cost=dict(type='IoU3DCost', weight=0.25))),
        test_cfg=dict(
            dataset='nuScenes',
            grid_size=[1440, 1440, 41],
            out_size_factor=8,
            voxel_size=[0.075, 0.075],
            pc_range=[-54.0, -54.0],
            nms_type=None),
        common_heads=dict(
            center=[2, 2], height=[1, 2], dim=[3, 2], rot=[2, 2], vel=[2, 2]),
        bbox_coder=dict(
            type='TransFusionBBoxCoder',
            pc_range=[-54.0, -54.0],
            post_center_range=[-61.2, -61.2, -10.0, 61.2, 61.2, 10.0],
            score_threshold=0.0,
            out_size_factor=8,
            voxel_size=[0.075, 0.075],
            code_size=10),
        loss_cls=dict(
            type='mmdet.FocalLoss',
            use_sigmoid=True,
            gamma=2.0,
            alpha=0.25,
            reduction='mean',
            loss_weight=1.0),
        loss_heatmap=dict(
            type='mmdet.GaussianFocalLoss', reduction='mean', loss_weight=1.0),
        loss_bbox=dict(
            type='mmdet.L1Loss', reduction='mean', loss_weight=0.25)))

db_sampler = dict(
    data_root=data_root,
    info_path=data_root + 'nuscenes_dbinfos_train.pkl',
    rate=1.0,
    prepare=dict(
        filter_by_difficulty=[-1],
        filter_by_min_points=dict(Car=5, Pedestrian=5, Cyclist=5)),
    classes=class_names,
    sample_groups=dict(
        car=5,
        truck=5,
        bus=5,
        trailer=5,
        construction_vehicle=5,
        traffic_cone=5,
        barrier=5,
        motorcycle=5,
        bicycle=5,
        pedestrian=5),
    points_loader=dict(
        type='LoadPointsFromFile',
        coord_type='LIDAR',
        load_dim=5,
        use_dim=[0, 1, 2, 3, 4],
        reduce_beams=32))

train_pipeline = [
    dict(
        type='BEVLoadMultiViewImageFromFiles',
        to_float32=True,
        color_type='color'),
    dict(
        type='LoadPointsFromFile',
        coord_type='LIDAR',
        load_dim=5,
        use_dim=5,
        reduce_beams=32,
        load_augmented=None),
    dict(
        type='LoadPointsFromMultiSweeps',
        sweeps_num=9,
        load_dim=5,
        use_dim=5,
        reduce_beams=32,
        pad_empty_sweeps=True,
        remove_close=True,
        load_augmented=None),
    dict(
        type='LoadAnnotations3D',
        with_bbox_3d=True,
        with_label_3d=True,
        with_attr_label=False),
    # dict(type='ObjectSampling', db_sampler=db_sampler),
    dict(
        type='ImageAug3D',
        final_dim=[256, 704],
        resize_lim=[0.38, 0.55],
        bot_pct_lim=[0.0, 0.0],
        rot_lim=[-5.4, 5.4],
        rand_flip=True,
        is_train=True),
    dict(
        type='GlobalRotScaleTrans',
        resize_lim=[0.9, 1.1],
        rot_lim=[-0.78539816, 0.78539816],
        trans_lim=0.5,
        is_train=True),
    dict(type='RandomFlip3D'),
    dict(type='PointsRangeFilter', point_cloud_range=point_cloud_range),
    dict(type='ObjectRangeFilter', point_cloud_range=point_cloud_range),
    dict(
        type='ObjectNameFilter',
        classes=[
            'car', 'truck', 'construction_vehicle', 'bus', 'trailer',
            'barrier', 'motorcycle', 'bicycle', 'pedestrian', 'traffic_cone'
        ]),
    dict(
        type='GridMask',
        use_h=True,
        use_w=True,
        max_epoch=6,
        rotate=1,
        offset=False,
        ratio=0.5,
        mode=1,
        prob=0.0,
        fixed_prob=True),
    dict(type='PointShuffle'),
    dict(
        type='Pack3DDetInputs',
        keys=[
            'points', 'img', 'gt_bboxes_3d', 'gt_labels_3d', 'gt_bboxes',
            'gt_labels'
        ])
]

test_pipeline = [
    dict(
        type='BEVLoadMultiViewImageFromFiles',
        to_float32=True,
        color_type='color'),
    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=5, use_dim=5),
    dict(
        type='LoadPointsFromMultiSweeps',
        sweeps_num=9,
        load_dim=5,
        use_dim=5,
        pad_empty_sweeps=True,
        remove_close=True),
    dict(
        type='ImageAug3D',
        final_dim=[256, 704],
        resize_lim=[0.48, 0.48],
        bot_pct_lim=[0.0, 0.0],
        rot_lim=[0.0, 0.0],
        rand_flip=False,
        is_train=False),
    dict(
        type='PointsRangeFilter',
        point_cloud_range=[-54.0, -54.0, -5.0, 54.0, 54.0, 3.0]),
    dict(
        type='Pack3DDetInputs',
        keys=['img', 'points', 'gt_bboxes_3d', 'gt_labels_3d'],
        meta_keys=[
            'cam2img', 'ori_cam2img', 'lidar2cam', 'lidar2img', 'cam2lidar',
            'ori_lidar2img', 'img_aug_matrix', 'box_type_3d', 'sample_idx',
            'lidar_path', 'img_path'
        ])
]

train_dataloader = dict(
    batch_size=4,
    num_workers=4,
    persistent_workers=True,
    sampler=dict(type='DefaultSampler', shuffle=True),
    dataset=dict(
        type=dataset_type,
        data_root=data_root,
        ann_file='nuscenes_infos_train.pkl',
        pipeline=train_pipeline,
        metainfo=metainfo,
        modality=input_modality,
        test_mode=False,
        data_prefix=data_prefix,
        # we use box_type_3d='LiDAR' in kitti and nuscenes dataset
        # and box_type_3d='Depth' in sunrgbd and scannet dataset.
        box_type_3d='LiDAR'))
val_dataloader = dict(
    batch_size=1,
    num_workers=0,
    # persistent_workers=True,
    drop_last=False,
    sampler=dict(type='DefaultSampler', shuffle=False),
    dataset=dict(
        type=dataset_type,
        data_root=data_root,
        ann_file='nuscenes_infos_val.pkl',
        pipeline=test_pipeline,
        metainfo=metainfo,
        modality=input_modality,
        data_prefix=data_prefix,
        test_mode=True,
        box_type_3d='LiDAR'))
test_dataloader = val_dataloader

val_evaluator = dict(
    type='NuScenesMetric',
    data_root=data_root,
    ann_file=data_root + 'nuscenes_infos_val.pkl',
    metric='bbox')
test_evaluator = val_evaluator

vis_backends = [dict(type='LocalVisBackend')]
visualizer = dict(
    type='Det3DLocalVisualizer', vis_backends=vis_backends, name='visualizer')

param_scheduler = [
    dict(
        type='LinearLR',
        start_factor=0.33333333,
        by_epoch=False,
        begin=0,
        end=500),
    dict(
        type='CosineAnnealingLR',
        begin=0,
        T_max=6,
        end=6,
        by_epoch=True,
        eta_min_ratio=1e-3),
    # momentum scheduler
    # During the first 8 epochs, momentum increases from 1 to 0.85 / 0.95
    # during the next 12 epochs, momentum increases from 0.85 / 0.95 to 1
    dict(
        type='CosineAnnealingMomentum',
        eta_min=0.85 / 0.95,
        begin=0,
        end=2.4,
        by_epoch=True,
        convert_to_iter_based=True),
    dict(
        type='CosineAnnealingMomentum',
        eta_min=1,
        begin=2.4,
        end=6,
        by_epoch=True,
        convert_to_iter_based=True)
]

# runtime settings
train_cfg = dict(by_epoch=True, max_epochs=6, val_interval=6)
val_cfg = dict()
test_cfg = dict()

optim_wrapper = dict(
    type='OptimWrapper',
    optimizer=dict(type='AdamW', lr=0.0002, weight_decay=0.01),
    clip_grad=dict(max_norm=35, norm_type=2))

# Default setting for scaling LR automatically
#   - `enable` means enable scaling LR automatically
#       or not by default.
#   - `base_batch_size` = (4 GPUs) x (4 samples per GPU).
auto_scale_lr = dict(enable=False, base_batch_size=16)

default_hooks = dict(
    logger=dict(type='LoggerHook', interval=50),
    checkpoint=dict(type='CheckpointHook', interval=5))
