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"""Instance normalization operator."""

from .. import cpp


def instance_norm(data, gamma, beta, channel_axis, axis, epsilon=1e-5):
    """Instance normalization operator.

    Parameters
    ----------
    data : tvm.te.Tensor
        N-D with shape (d_0, d_1, ..., d_{N-1})

    gamma: tvm.te.Tensor
        K-D with shape (r_0, r_1, ..., r_{K-1}) where K == len(axis) and d_{axis_k} == r_k

    beta: tvm.te.Tensor
        Optional, K-D with shape (r_0, r_1, ..., r_{K-1}) where K == len(axis) and d_{axis_k} == r_k

    axis : list of int
        Axis over the normalization applied (the axis along which the mean and variance are
        computed)

    epsilon : float
        The epsilon value to avoid division by zero.

    Returns
    -------
    result : tvm.te.Tensor
        N-D with shape (d_0, d_1, ..., d_{N-1})
    """
    return cpp.nn.instance_norm(data, gamma, beta, channel_axis, axis, epsilon)