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/* -*- c++ -*- */
/*
* Copyright 2008,2009 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <vrt_source_32fc.h>
#include <vrt/expanded_header.h>
#include <vrt/copiers.h>
#include <vrt/types.h>
#include <vrt/if_context.h>
#include <gr_io_signature.h>
#include <missing_pkt_checker.h>
#include <iostream>
#include <gruel/inet.h>
#include <cstdio>
#define VERBOSE 1 // define to 0 or 1
class rx_32fc_handler : public vrt::rx_packet_handler
{
int d_noutput_items;
std::complex<float> *d_out;
int *d_oo; // output index
std::vector< std::complex<float> > &d_remainder;
missing_pkt_checker &d_checker;
all_context_t d_if_context;
size_t d_if_context_n32_bit_words;
public:
rx_32fc_handler(int noutput_items, std::complex<float> *out,
int *oo, std::vector< std::complex<float> > &remainder,
missing_pkt_checker &checker)
: d_noutput_items(noutput_items), d_out(out),
d_oo(oo), d_remainder(remainder), d_checker(checker),
d_if_context_n32_bit_words(0) {}
~rx_32fc_handler();
bool operator()(const uint32_t *payload,
size_t n32_bit_words,
const vrt::expanded_header *hdr);
all_context_t* get_if_context(void){
return d_if_context_n32_bit_words? &d_if_context : NULL;};
};
rx_32fc_handler::~rx_32fc_handler()
{
}
bool
rx_32fc_handler::operator()(const uint32_t *payload,
size_t n32_bit_words,
const vrt::expanded_header *hdr)
{
if (hdr->if_data_p()){
int nmissing = d_checker.check(hdr);
if (VERBOSE && nmissing != 0){
std::cerr << "S" << nmissing;
}
// copy as many as will fit into the output buffer.
size_t n = std::min(n32_bit_words, (size_t)(d_noutput_items - *d_oo));
vrt::copy_net_16sc_to_host_32fc(n, payload, &d_out[*d_oo]);
*d_oo += n;
// if there are any left over, copy them into remainder and tell
// our caller we're had enough for now.
size_t r = n32_bit_words - n;
if (r > 0){
assert(d_remainder.size() == 0);
d_remainder.resize(r);
vrt::copy_net_16sc_to_host_32fc(r, &payload[n], &d_remainder[0]);
return false; // Stop calling us.
}
return true; // Keep calling us, we've got more room
}
else if (hdr->if_context_p()){
// print the IF-Context packet
fprintf(stderr, "\nIF-Context:\n");
//for (size_t i = 0; i < n32_bit_words; i++)
// fprintf(stderr, "%04x: %08x\n", (unsigned int) i, ntohl(payload[i]));
memcpy(&d_if_context, payload, sizeof(uint32_t)*n32_bit_words);
d_if_context_n32_bit_words = n32_bit_words;
return true;
}
else {
// It's most likely an Extension Data or Extension Context packet
// (that we don't know how to interpret...)
fprintf(stderr, "\nIF-Extension:\n");
for (size_t i = 0; i < n32_bit_words; i++)
fprintf(stderr, "%04x: %08x\n", (unsigned int) i, ntohl(payload[i]));
return true;
}
}
// ------------------------------------------------------------------------
vrt_source_32fc::vrt_source_32fc(const char *name)
: vrt_source_base(name,
gr_make_io_signature(1, 1, sizeof(gr_complex)))
{
}
vrt_source_32fc::~vrt_source_32fc()
{
if (VERBOSE){
std::cerr << "\nvrt_source_32fc: npackets = " << d_checker.npackets()
<< " nwrong_pkt_cnt = " << d_checker.nwrong_pkt_cnt()
<< " nmissing_pkt_est = " << d_checker.nmissing_pkt_est()
<< std::endl;
}
}
int
vrt_source_32fc::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
gr_complex *out = (gr_complex *)output_items[0];
int oo = 0;
// Handle any samples left over from the last call.
int t = std::min(noutput_items, (int)d_remainder.size());
if (t != 0){
for (int i = 0; i < t; i++)
out[i] = d_remainder[i];
d_remainder.erase(d_remainder.begin(), d_remainder.begin()+t);
oo = t;
}
if (noutput_items - oo == 0)
return oo;
// While we've got room, and there are packets, handle them
rx_32fc_handler h(noutput_items, out, &oo, d_remainder, d_checker);
bool ok = vrt_rx()->rx_packets(&h);
if (!ok){
std::cerr << "vrt_source_32fc: vrt::rx_packets() failed" << std::endl;
return -1; // say we're done
}
//we have a context packet, grab its useful information...
//remember that things are in network byte order!
if (h.get_if_context()){
d_actual_lo_freq = vrt_freq_to_double(ntohll(h.get_if_context()->beamformer.rf_ref_freq));
}
return oo;
}
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