_base_ = [
    '../../../_base_/models/slowonly_r50.py',
    '../../../_base_/default_runtime.py'
]

# model settings
model = dict(backbone=dict(pretrained=None), cls_head=dict(num_classes=200))

# dataset settings
dataset_type = 'VideoDataset'
# The flag indicates using joint training
omnisource = True

data_root = 'data/OmniSource/kinetics_200_train'
data_root_val = 'data/OmniSource/kinetics_200_val'
iv_root = 'data/OmniSource/insvideo_200'

ann_file_train = 'data/OmniSource/annotations/kinetics_200/k200_train.txt'
ann_file_iv = ('data/OmniSource/annotations/insvideo_200/'
               'slowonly_8x8_insvideo_200_wodup.txt')

ann_file_val = 'data/OmniSource/annotations/kinetics_200/k200_val.txt'
ann_file_test = 'data/OmniSource/annotations/kinetics_200/k200_val.txt'

img_norm_cfg = dict(
    mean=[123.675, 116.28, 103.53], std=[58.395, 57.12, 57.375], to_bgr=False)

train_pipeline = [
    dict(type='DecordInit'),
    dict(type='SampleFrames', clip_len=8, frame_interval=8, num_clips=1),
    dict(type='DecordDecode'),
    dict(type='Resize', scale=(-1, 256)),
    dict(type='RandomResizedCrop'),
    dict(type='Resize', scale=(224, 224), keep_ratio=False),
    dict(type='Flip', flip_ratio=0.5),
    dict(type='Normalize', **img_norm_cfg),
    dict(type='FormatShape', input_format='NCTHW'),
    dict(type='Collect', keys=['imgs', 'label'], meta_keys=[]),
    dict(type='ToTensor', keys=['imgs', 'label'])
]
train_iv_pipeline = [
    dict(type='DecordInit'),
    dict(type='SampleFrames', clip_len=8, frame_interval=8, num_clips=1),
    dict(type='DecordDecode'),
    dict(type='Resize', scale=(-1, 256)),
    dict(type='RandomResizedCrop'),
    dict(type='Resize', scale=(224, 224), keep_ratio=False),
    dict(type='Flip', flip_ratio=0.5),
    dict(type='Normalize', **img_norm_cfg),
    dict(type='FormatShape', input_format='NCTHW'),
    dict(type='Collect', keys=['imgs', 'label'], meta_keys=[]),
    dict(type='ToTensor', keys=['imgs', 'label'])
]

val_pipeline = [
    dict(type='DecordInit'),
    dict(
        type='SampleFrames',
        clip_len=8,
        frame_interval=8,
        num_clips=1,
        test_mode=True),
    dict(type='DecordDecode'),
    dict(type='Resize', scale=(-1, 256)),
    dict(type='CenterCrop', crop_size=256),
    dict(type='Normalize', **img_norm_cfg),
    dict(type='FormatShape', input_format='NCTHW'),
    dict(type='Collect', keys=['imgs', 'label'], meta_keys=[]),
    dict(type='ToTensor', keys=['imgs'])
]

test_pipeline = [
    dict(type='DecordInit'),
    dict(
        type='SampleFrames',
        clip_len=8,
        frame_interval=8,
        num_clips=10,
        test_mode=True),
    dict(type='DecordDecode'),
    dict(type='Resize', scale=(-1, 256)),
    dict(type='ThreeCrop', crop_size=256),
    dict(type='Normalize', **img_norm_cfg),
    dict(type='FormatShape', input_format='NCTHW'),
    dict(type='Collect', keys=['imgs', 'label'], meta_keys=[]),
    dict(type='ToTensor', keys=['imgs'])
]

data = dict(
    videos_per_gpu=12,
    workers_per_gpu=2,
    test_dataloader=dict(videos_per_gpu=1),
    train=[
        dict(
            type=dataset_type,
            ann_file=ann_file_train,
            data_prefix=data_root,
            pipeline=train_pipeline),
        dict(
            type=dataset_type,
            ann_file=ann_file_iv,
            data_prefix=iv_root,
            pipeline=train_iv_pipeline,
            num_classes=200,
            sample_by_class=True,
            power=0.5)
    ],
    val=dict(
        type=dataset_type,
        ann_file=ann_file_val,
        data_prefix=data_root_val,
        pipeline=val_pipeline),
    test=dict(
        type=dataset_type,
        ann_file=ann_file_test,
        data_prefix=data_root_val,
        pipeline=test_pipeline))
evaluation = dict(
    interval=8, metrics=['top_k_accuracy', 'mean_class_accuracy'])

# optimizer
optimizer = dict(
    type='SGD', lr=0.15, momentum=0.9,
    weight_decay=0.0001)  # this lr is used for 8 gpus
optimizer_config = dict(grad_clip=dict(max_norm=40, norm_type=2))
# learning policy
lr_config = dict(policy='CosineAnnealing', min_lr=0)

# runtime settings
total_epochs = 256
checkpoint_config = dict(interval=8)
work_dir = ('./work_dirs/omnisource/'
            'slowonly_r50_8x8x1_256e_minikinetics_insvideo_rgb')
find_unused_parameters = False
