# SPDX-License-Identifier: Apache-2.0

import copy
from ....common._registration import register_shape_calculator
from ....common.data_types import FloatTensorType
from ....common.utils import check_input_and_output_numbers, check_input_and_output_types


def calculate_upsample_output_shapes(operator):
    '''
    Allowed input/output patterns are
        1. [N, C, H, W] ---> [N, C, H', W']
    '''
    check_input_and_output_numbers(operator, input_count_range=1, output_count_range=1)
    check_input_and_output_types(operator, good_input_types=[FloatTensorType])

    scales = operator.raw_operator.upsample.scalingFactor

    output_shape = copy.deepcopy(operator.inputs[0].type.shape)
    output_shape[2] *= scales[0]
    output_shape[3] *= scales[1]

    operator.outputs[0].type = FloatTensorType(output_shape, doc_string=operator.outputs[0].type.doc_string)


register_shape_calculator('upsample', calculate_upsample_output_shapes)
