# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
from vllm.sampling_params import SamplingParams

_SAMPLING_EPS = 1e-5


def is_spec_decode_unsupported(sampling_params: SamplingParams) -> bool:
    """True if request is incompatible with speculative decoding"""
    return (
        sampling_params.frequency_penalty != 0.0
        or sampling_params.presence_penalty != 0.0
        or sampling_params.repetition_penalty != 1.0
        or sampling_params.min_p > _SAMPLING_EPS
        or sampling_params.logprobs is not None
    )