add noise to end of signals to prevent ending with dtx section

import pathlib

import sys

import re

import numpy as np

from tempfile import TemporaryDirectory

from .constants import TESTV_DIR, SCRIPTS_DIR

        bitstream_file = tmp_dir.joinpath(f"{in_format}.192").absolute()

        sampling_rate_khz = 48

        input_file = TESTV_DIR.joinpath(INPUT_FILES[in_format])

        # for DTX cases append 5 frames of white noise to the file

        # this should make sure that there is no DTX segment at the very end of the signal

        # DTX at the end can still cause length differences which are fine to exist, but make the comparison hard to handle

        # EXCEPTION (of course there is one...): MASA. We cant append to the signal without appending some MD. Luckily, this problem does not occur with the MASA testvectors

        if dtx == DTX_ON and "MASA" not in in_format:

            input_signal, fs = audiofile.readfile(input_file)

            noise_len = fs // 50 * 5

            noise_amplitude = np.max(input_signal)

            noise = (

                np.random.random((noise_len, input_signal.shape[1])) * noise_amplitude

            )

            input_signal = np.concatenate([input_signal, noise])

            input_file = tmp_dir.joinpath(f"{input_file.stem}-plus-noise.wav")

            audiofile.writefile(input_file, input_signal, fs)

        options = get_options(in_format, dtx == DTX_ON)

        dut_encoder_frontend.run(

            bitrate,

        # run decoder without network simulation

        output = output_dir_no_jbm.joinpath(

            f"{in_format}-{bitrate}-{out_format}.wav"

            f"{in_format}-{bitrate}-{out_format}-{dtx}.wav"

        ).absolute()

        dut_decoder_frontend.run(out_format, sampling_rate_khz, bitstream_file, output)