add ctest measurement output for ssnr script

from pyaudio3dtools import audiofile, audioarray

def main(args):

    ref_sig, fs_ref = audiofile.readfile(args.ref_file)

    test_sig, fs_test = audiofile.readfile(args.test_file)

    if fs_ref != fs_test:

        print("Files need to have same sampling rate!")

        return -1

    len_seg = int(20 * fs_ref / 1000)

    print(len_seg, ref_sig.shape, test_sig.shape)

    ssnr = audioarray.ssnr(

        ref_sig,

        test_sig,

        len_seg,

        args.thresh_low,

        args.thresh_high,

        args.apply_thresholds_on_ref_only,

    )

    for i, s in enumerate(ssnr, start=1):

        print(f"Channel {i}: {s}")

    return 0

if __name__ == "__main__":

    parser = argparse.ArgumentParser()

    parser.add_argument("ref_file", type=pathlib.Path, help="Reference signal wav file")

        help="Use this to apply the thresholding on signal power to the reference signal only.\n"

        "This makes the implementation behaviour conform to the MPEG-D conformance spec.",

    )

    parser.add_argument(

        "--print-ctest-measurement",

        action="store_true",

        default=False,

        help="Print easy to parse single SSNR value",

    )

    args = parser.parse_args()

    sys.exit(main(args))

    ref_sig, fs_ref = audiofile.readfile(args.ref_file)

    test_sig, fs_test = audiofile.readfile(args.test_file)

    if fs_ref != fs_test:

        print("Files need to have same sampling rate!")

        sys.exit(1)

    len_seg = int(20 * fs_ref / 1000)

    print(len_seg, ref_sig.shape, test_sig.shape)

    ssnr = audioarray.ssnr(

        ref_sig,

        test_sig,

        len_seg,

        args.thresh_low,

        args.thresh_high,

        args.apply_thresholds_on_ref_only,

    )

    for i, s in enumerate(ssnr, start=1):

        print(f"Channel {i}: {s}")

    if args.print_ctest_measurement:

        min_ssnr = ssnr.min()

        print(

            f'<CTestMeasurement type="numeric/double" name="SSNR">{min_ssnr}</CTestMeasurement>'

        )

    sys.exit(0)