def test_loopback_003(self):
"""
Loopback randomizer/rs_encoder/interleaver/trellis_encoder
via ds_to_softds to
viterbi_decoder/deinterleaver/rs_decoder/derandomizer
"""
src_data = make_transport_stream()
interleaver_delay = 52
viterbi_delay = 12
expected_result = src_data[0:len(src_data)-((interleaver_delay+viterbi_delay)*atsc.ATSC_MPEG_PKT_LENGTH)]
src = vector_source_ts(src_data)
rand = atsc.randomizer()
rs_enc = atsc.rs_encoder()
inter = atsc.interleaver()
trellis = atsc.trellis_encoder()
softds = atsc.ds_to_softds()
viterbi = atsc.viterbi_decoder()
deinter = atsc.deinterleaver()
rs_dec = atsc.rs_decoder()
derand = atsc.derandomizer()
dst = vector_sink_ts()
self.tb.connect(src, rand, rs_enc, inter, trellis, softds, viterbi, deinter, rs_dec, derand, dst)
self.tb.run ()
result_data = dst.data ()[((interleaver_delay+viterbi_delay)*atsc.ATSC_MPEG_PKT_LENGTH):len(dst.data())]
self.assertEqual (expected_result, result_data)
def test_loopback_002(self):
"""
Loopback randomizer/rs_encoder/interleaver to
deinterleaver/rs_decoder/derandomizer
"""
src_data = make_transport_stream()
interleaver_delay = 52
expected_result = src_data[0:len(src_data) -
(interleaver_delay *
atsc.ATSC_MPEG_PKT_LENGTH)]
src = vector_source_ts(src_data)
rand = atsc.randomizer()
rs_enc = atsc.rs_encoder()
inter = atsc.interleaver()
deinter = atsc.deinterleaver()
rs_dec = atsc.rs_decoder()
derand = atsc.derandomizer()
dst = vector_sink_ts()
self.tb.connect(src, rand, rs_enc, inter, deinter, rs_dec, derand, dst)
self.tb.run()
result_data = dst.data()
result_data = result_data[(interleaver_delay *
atsc.ATSC_MPEG_PKT_LENGTH):len(result_data)]
self.assertEqual(expected_result, result_data)
def test_loopback_001(self):
"""
Loopback randomizer/rs_encoder to rs_decoder/derandomizer
"""
src_data = make_transport_stream()
expected_result = src_data
src = vector_source_ts(src_data)
rand = atsc.randomizer()
rs_enc = atsc.rs_encoder()
rs_dec = atsc.rs_decoder()
derand = atsc.derandomizer()
dst = vector_sink_ts()
self.tb.connect(src, rand, rs_enc, rs_dec, derand, dst)
self.tb.run ()
result_data = dst.data ()
self.assertEqual (expected_result, result_data)
def test_loopback_002(self):
"""
Loopback randomizer/rs_encoder/interleaver to
deinterleaver/rs_decoder/derandomizer
"""
src_data = make_transport_stream()
interleaver_delay = 52
expected_result = src_data[0:len(src_data)-(interleaver_delay*atsc.ATSC_MPEG_PKT_LENGTH)]
src = vector_source_ts(src_data)
rand = atsc.randomizer()
rs_enc = atsc.rs_encoder()
inter = atsc.interleaver()
deinter = atsc.deinterleaver()
rs_dec = atsc.rs_decoder()
derand = atsc.derandomizer()
dst = vector_sink_ts()
self.tb.connect(src, rand, rs_enc, inter, deinter, rs_dec, derand, dst)
self.tb.run ()
result_data = dst.data ()
result_data = result_data[(interleaver_delay*atsc.ATSC_MPEG_PKT_LENGTH):len(result_data)]
self.assertEqual (expected_result, result_data)