test_lsp2sp.py

# ------------------------------------------------------------------------ #
# Copyright 2022 SPTK Working Group                                        #
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# Licensed under the Apache License, Version 2.0 (the "License");          #
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import pytest
import torch

import diffsptk
import tests.utils as U


@pytest.mark.parametrize("device", ["cpu", "cuda"])
@pytest.mark.parametrize("module", [False, True])
@pytest.mark.parametrize("M", [7, 8])
@pytest.mark.parametrize("out_format", [0, 1, 2, 3])
def test_compatibility(device, module, M, out_format, L=16, B=2):
    lsp2sp = U.choice(
        module,
        diffsptk.LineSpectralPairsToSpectrum,
        diffsptk.functional.lsp2sp,
        {"lsp_order": M},
        {"fft_length": L, "out_format": out_format},
    )

    U.check_compatibility(
        device,
        lsp2sp,
        [],
        f"nrand -l {B*L} | lpc -l {L} -m {M} | lpc2lsp -m {M}",
        f"mglsp2sp -m {M} -l {L} -o {out_format}",
        [],
        dx=M + 1,
        dy=L // 2 + 1,
    )

    U.check_differentiability(device, [lsp2sp, torch.abs], [B, M + 1])