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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 2, 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <cppunit/TestAssert.h>
#include <qa_atsci_viterbi_decoder.h>
#include <qa_atsci_trellis_encoder.h>
#include <cstdio>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#define NELEM(x) (sizeof (x) / sizeof (x[0]))
static const int NCODERS = atsci_viterbi_decoder::NCODERS;
#if 0
static void
map_to_soft_symbols (atsc_soft_data_segment &out,
const atsc_data_segment &in)
{
for (unsigned int i = 0; i < NELEM (in.data); i++){
out.data[i] = in.data[i] * 2 - 7;
}
}
#endif
static void
pad_decoder_input (atsc_soft_data_segment out[NCODERS])
{
memset (out, 0, sizeof (out));
// add data segment sync
for (int i = 0; i < NCODERS; i++){
out[i].data[0] = 5;
out[i].data[1] = -5;
out[i].data[2] = -5;
out[i].data[3] = 5;
out[i].pli.set_regular_seg (false, i);
}
}
void
qa_atsci_viterbi_decoder::t0 ()
{
#if 0
atsci_trellis_encoder enc;
atsc_mpeg_packet_rs_encoded encoder_in[NCODERS];
atsc_data_segment encoder_out[NCODERS];
atsc_soft_data_segment decoder_in[NCODERS];
atsc_soft_data_segment decoder_in_pad[NCODERS];
atsc_mpeg_packet_rs_encoded decoder_out[NCODERS];
atsc_mpeg_packet_rs_encoded decoder_out_pad[NCODERS];
memset (encoder_in, 0, sizeof (encoder_in));
memset (encoder_out, 0, sizeof (encoder_out));
memset (decoder_out_pad, 0, sizeof (decoder_out_pad));
srandom (1);
for (int i = 0; i < NCODERS; i++){
for (unsigned int j = 0; j < NELEM (encoder_in[i].data); j++){
int t = (random () >> 8) & 0xff; // 8 random bits
encoder_in[i].data[j] = t;
}
}
fflush (stdout);
printf ("@@@ ENCODER INPUT @@@\n");
for (int i = 0; i < NCODERS; i++){
for (unsigned int j = 0; j < NELEM (encoder_in[i].data); j++){
printf ("%d\n", encoder_in[i].data[j]);
}
}
enc.reset ();
enc.encode (encoder_out, encoder_in);
printf ("@@@ ENCODER OUTPUT @@@\n");
for (int i = 0; i < NCODERS; i++){
for (unsigned int j = 0; j < NELEM (encoder_out[i].data); j++){
printf ("%d\n", encoder_out[i].data[j]);
}
}
for (int i = 0; i < NCODERS; i++)
map_to_soft_symbols (decoder_in[i], encoder_out[i]);
viterbi.reset ();
// this has only the previous (non-existant) output
viterbi.decode (decoder_out_pad, decoder_in);
// now we'll see the real output
pad_decoder_input (decoder_in_pad);
viterbi.decode (decoder_out, decoder_in_pad);
printf ("@@@ DECODER OUTPUT @@@\n");
for (int i = 0; i < NCODERS; i++){
for (unsigned int j = 0; j < NELEM (decoder_out[i].data); j++){
printf ("%d\n", decoder_out[i].data[j]);
}
}
fflush (stdout);
#endif
}
void
qa_atsci_viterbi_decoder::t1 ()
{
atsc_soft_data_segment decoder_in[NCODERS];
atsc_soft_data_segment decoder_in_pad[NCODERS];
atsc_mpeg_packet_rs_encoded decoder_out[NCODERS];
atsc_mpeg_packet_rs_encoded decoder_out_pad[NCODERS];
atsc_mpeg_packet_rs_encoded expected_out[NCODERS];
static const float raw_input[NCODERS * NELEM (decoder_in[0].data)] = {
#include "qa_atsci_viterbi_decoder_t1_input.dat"
};
static const unsigned char raw_output[NCODERS * NELEM (expected_out[0].data)] = {
#include "qa_atsci_viterbi_decoder_t1_output.dat"
};
// load up input
const float *ri = &raw_input[0];
for (int i = 0; i < NCODERS; i++){
for (unsigned int j = 0; j < NELEM (decoder_in[i].data); j++){
decoder_in[i].data[j] = *ri++;
}
decoder_in[i].pli.set_regular_seg (false, i);
}
// load up expected output
const unsigned char *ro = &raw_output[0];
for (int i = 0; i < NCODERS; i++){
for (unsigned int j = 0; j < NELEM (expected_out[i].data); j++){
expected_out[i].data[j] = *ro++;
}
expected_out[i].pli.set_regular_seg (false, i);
}
viterbi.reset ();
// this has only the previous (non-existant) output
viterbi.decode (decoder_out_pad, decoder_in);
// now we'll see the real output
pad_decoder_input (decoder_in_pad);
viterbi.decode (decoder_out, decoder_in_pad);
for (int i = 0; i < NCODERS; i++){ // check the result
CPPUNIT_ASSERT (expected_out[i] == decoder_out[i]);
}
}
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