add metadata BE comparison in test_param_file.py

import os

import errno

import platform

import filecmp

from subprocess import run

import pytest

from cmp_pcm import cmp_pcm

    # -> construct output filename

    output_file = f"{testv_base}_{tag_str}.dec.wav"

    decode(

    stdout = decode(

        dut_decoder_frontend,

        ref_decoder_path,

        reference_path,

        tracefile_dec,

    )

    # get metadata file paths from decoder stdout

    md_out_files = list()

    for line in stdout.split("\n"):

        line_strip = line.strip()

        if line_strip.startswith("Output metadata file"):

            line_split = line_strip.split()

            md_file = os.path.basename(line_split[-1])

            md_out_files.append(md_file)

    if update_ref in [0, 2]:

        dut_file = f"{dut_base_path}/param_file/dec/{output_file}"

        ref_file = f"{reference_path}/param_file/dec/{output_file}"

        dut_output_file = f"{dut_base_path}/param_file/dec/{output_file}"

        ref_output_file = f"{reference_path}/param_file/dec/{output_file}"

        fs = int(sampling_rate) * 1000

        cmp_result, reason = cmp_pcm(dut_file, ref_file, output_config, fs)

        cmp_result, reason = cmp_pcm(dut_output_file, ref_output_file, output_config, fs)

        assert cmp_result == 0, reason

        for md_file in md_out_files:

            print(md_file)

            dut_metadata_file = f"{dut_base_path}/param_file/dec/{md_file}"

            ref_metadata_file = f"{reference_path}/param_file/dec/{md_file}"

            msg = "Metadata output files differ between reference and dut."

            assert filecmp.cmp(dut_metadata_file, ref_metadata_file), msg

        # remove DUT output files when test result is OK (to save disk space)

        if not keep_files:

            os.remove(f"{dut_base_path}/param_file/enc/{bitstream_file}")

            add_option_list=add_option_list,

        )

        stdout = ref_decoder.stdout

    if update_ref in [0, 2]:

        check_and_makedir(dut_out_dir)

        add_option_list = dec_opts_list

            dut_out_file,

            add_option_list=add_option_list,

        )

        stdout = decoder_frontend.stdout

    return stdout

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