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/* -*- c++ -*- */
/*
* Copyright 2002 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include <cppunit/TestAssert.h>
#include <qa_atsci_data_interleaver.h>
#include <string.h>
/*!
* write an easy to identify pattern into the packet
*/
void
qa_atsci_data_interleaver::init_test_packet (int counter,
atsc_mpeg_packet_rs_encoded &out)
{
out.data[0] = 0xf0;
out.data[1] = 0xff;
out.data[2] = (counter >> 8) & 0xff;
out.data[3] = counter & 0xff;
for (int i = 4; i < 205; i++)
out.data[i] = i;
out.data[205] = 0xa0;
out.data[206] = 0xaf;
}
void
qa_atsci_data_interleaver::print_packet (FILE *fp,
int frame_number,
int field_number,
int segment_number,
const atsc_mpeg_packet_rs_encoded &in)
{
fprintf (fp, "%04d:%d:%03d ", frame_number, field_number, segment_number);
const unsigned char *p = &in.data[0];
for (int i = 0; i < 8; i++)
fprintf (fp, "%02X", p[i]);
fprintf (fp, " ");
p = &in.data[8];
for (int i = 0; i < 8; i++)
fprintf (fp, "%02X", p[i]);
fprintf (fp, " ... ");
p = &in.data[191];
for (int i = 0; i < 8; i++)
fprintf (fp, "%02X", p[i]);
fprintf (fp, " ");
p = &in.data[199];
for (int i = 0; i < 8; i++)
fprintf (fp, "%02X", p[i]);
fprintf (fp, "\n");
}
void
qa_atsci_data_interleaver::chk_assert (const atsc_mpeg_packet_rs_encoded &expected,
const atsc_mpeg_packet_rs_encoded &actual)
{
if (expected == actual)
return;
FILE *fp = stderr;
fprintf (fp, "Expected: ");
print_packet (fp, 0, 0, 0, expected);
fprintf (fp, "Actual: ");
print_packet (fp, 0, 0, 0, actual);
CPPUNIT_ASSERT (expected == actual);
}
void
qa_atsci_data_interleaver::t0 ()
{
int counter = 0;
atsc_mpeg_packet_rs_encoded in, enc, out;
atsc_mpeg_packet_rs_encoded zero;
memset (&zero, 0, sizeof (zero));
for (int frame = 0; frame < 4; frame++){
for (int field = 0; field < 2; field++){
for (int segment = 0; segment < 312; segment++, counter++){
// build test packet
init_test_packet (counter, in);
in.pli.set_regular_seg (field == 1, segment);
// interleave it
outbound.interleave (enc, in);
// deinterleave it
inbound.deinterleave (out, enc);
if (counter < 52)
// CPPUNIT_ASSERT (zero == out);
chk_assert (zero, out);
else if (counter >= 52){
atsc_mpeg_packet_rs_encoded expected;
init_test_packet (counter - 52, expected);
// CPPUNIT_ASSERT (expected == out);
chk_assert (expected, out);
}
}
}
}
}
//
// Note, this assumes that the interleaver and deinterleaver
// have the state left by t0.
//
// This test pushes crap into the interleaver, and then confirms that
// the deinterleaver recovers. This would be part of what you'd see
// on a channel change.
//
void
qa_atsci_data_interleaver::t1 ()
{
int counter = 0;
atsc_mpeg_packet_rs_encoded in, enc, out;
atsc_mpeg_packet_rs_encoded zero;
memset (&zero, 0, sizeof (zero));
static const int NCRAP = 13;
// push NCRAP segments of crap into the interleaver,
// but don't change the deinterleaver state
for (int i = 0; i < NCRAP; i++){
init_test_packet (i + 2758, in);
in.pli.set_regular_seg (false, i + 5);
outbound.interleave (enc, in);
}
// now run the normal test.
// we should get good segments after NCRAP + 52
int starting_counter = 3141;
counter = starting_counter;
for (int frame = 0; frame < 4; frame++){
for (int field = 0; field < 2; field++){
for (int segment = 0; segment < 312; segment++, counter++){
// build test packet
init_test_packet (counter, in);
in.pli.set_regular_seg (field == 1, segment);
// interleave it
outbound.interleave (enc, in);
// deinterleave it
inbound.deinterleave (out, enc);
if (counter < starting_counter + 52 + NCRAP){
// don't care...
}
else if (counter >= starting_counter + 52 + NCRAP){
atsc_mpeg_packet_rs_encoded expected;
init_test_packet (counter - 52, expected);
// CPPUNIT_ASSERT (expected == out);
chk_assert (expected, out);
}
}
}
}
}
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