def test_random():
r = random.Random(0)
x = bytearray(r.randrange(0, 256) for i in range(16 * 1024))
y = ecc.encode(x)
x_ = concat(ecc.decode(y))
assert x_[: len(x)] == x
assert all(v == 0 for v in x_[len(x) :])
def main(args):
import ecc
log.info('Running MODEM @ {:.1f} kbps'.format(modem.modem_bps / 1e3))
fd = sys.stdout
# padding audio with silence
writer.write(fd, np.zeros(int(config.Fs * args.silence_start)))
start(fd, sym.carrier[config.carrier_index])
for c in sym.carrier:
training(fd, c)
training_size = writer.offset
log.info('%.3f seconds of training audio',
training_size / wave.bytes_per_second)
reader = Reader(sys.stdin, 64 << 10)
data = itertools.chain.from_iterable(reader)
encoded = itertools.chain.from_iterable(ecc.encode(data))
modulate(fd, bits=common.to_bits(encoded))
data_size = writer.offset - training_size
log.info('%.3f seconds of data audio, for %.3f kB of data',
data_size / wave.bytes_per_second, reader.total / 1e3)
# padding audio with silence
writer.write(fd, np.zeros(int(config.Fs * args.silence_stop)))
def test_file():
data = open("data.send").read()
enc = ecc.encode(data)
assert concat(ecc.decode(enc)) == data