--- /dev/null
+/* -*- c++ -*- */
+/*
+ * Copyright 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 <noaa_hrpt_decoder.h>
+#include <noaa_hrpt.h>
+#include <gr_io_signature.h>
+#include <cstdio>
+
+static const char *hrpt_ids[] = {
+ "000000",
+ "NOAA11",
+ "000002",
+ "NOAA16",
+ "000004",
+ "000005",
+ "000006",
+ "NOAA15",
+ "000008",
+ "NOAA12",
+ "000010",
+ "NOAA17",
+ "000012",
+ "NOAA18",
+ "000014",
+ "NOAA19"
+};
+
+noaa_hrpt_decoder_sptr
+noaa_make_hrpt_decoder(bool verbose, bool output_files)
+{
+ return gnuradio::get_initial_sptr(new noaa_hrpt_decoder(verbose, output_files));
+}
+
+noaa_hrpt_decoder::noaa_hrpt_decoder(bool verbose, bool output_files)
+ : gr_sync_block("noaa_hrpt_decoder",
+ gr_make_io_signature(1, 1, sizeof(short)),
+ gr_make_io_signature(0, 0, 0)),
+ d_verbose(verbose),
+ d_output_files(output_files),
+ d_word_num(0),
+ d_frames_seen(0),
+ d_current_mfnum(0),
+ d_expected_mfnum(0),
+ d_seq_errs(0),
+ d_address(0),
+ d_day_of_year(0),
+ d_milliseconds(0),
+ d_last_time(0)
+{
+ // Start of capture processing here
+}
+
+int
+noaa_hrpt_decoder::work(int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items)
+{
+ const unsigned short *in = (const unsigned short*)input_items[0];
+
+ int i = 0;
+ while (i < noutput_items) {
+ d_current_word = in[i++] & 0x3FF;
+ d_word_num++;
+
+ // Per HRPT word processing here
+
+ switch (d_word_num) {
+ case 7:
+ process_mfnum();
+ process_address();
+ break;
+
+ case 9:
+ process_day_of_year();
+ break;
+
+ case 10:
+ process_milli1();
+ break;
+
+ case 11:
+ process_milli2();
+ break;
+
+ case 12:
+ process_milli3();
+ break;
+
+ default:
+ break;
+ }
+
+ if (d_word_num == HRPT_MINOR_FRAME_WORDS) {
+
+ // End of minor frame processing here
+ d_frames_seen++;
+ d_word_num = 0;
+ fprintf(stderr, "\n");
+ }
+ }
+
+ return i;
+}
+
+void
+noaa_hrpt_decoder::process_mfnum()
+{
+ d_current_mfnum = (d_current_word & 0x180) >> 7;
+
+ if (d_verbose)
+ fprintf(stderr, "MF:");
+
+ if (d_current_mfnum != d_expected_mfnum && d_frames_seen > 0) {
+ d_seq_errs++;
+
+ if (d_verbose)
+ fprintf(stderr, "*");
+ }
+ else
+ if (d_verbose)
+ fprintf(stderr, " ");
+
+ if (d_verbose)
+ fprintf(stderr, "%i ", d_current_mfnum);
+ d_expected_mfnum = (d_current_mfnum == 3) ? 1 : d_current_mfnum+1;
+}
+
+void
+noaa_hrpt_decoder::process_address()
+{
+ d_address = ((d_current_word & 0x078) >> 3) & 0x000F;
+
+ if (d_verbose)
+ fprintf(stderr, "SA: %s ", hrpt_ids[d_address]);
+}
+
+void
+noaa_hrpt_decoder::process_day_of_year()
+{
+ d_day_of_year = d_current_word >> 1;
+
+ if (d_verbose)
+ fprintf(stderr, "DOY: %3i ", d_day_of_year);
+}
+
+void
+noaa_hrpt_decoder::process_milli1()
+{
+ d_milliseconds = (d_current_word & 0x7F) << 20;
+}
+
+void
+noaa_hrpt_decoder::process_milli2()
+{
+ d_milliseconds |= (d_current_word << 10);
+}
+
+void
+noaa_hrpt_decoder::process_milli3()
+{
+ d_milliseconds |= d_current_word;
+ int delta = d_milliseconds - d_last_time;
+ d_last_time = d_milliseconds;
+
+ if (d_verbose)
+ fprintf(stderr, "MS: %8i DT: %8i", d_milliseconds, delta);
+}
+
+noaa_hrpt_decoder::~noaa_hrpt_decoder()
+{
+ // End of capture processing here
+
+ if (d_verbose) {
+ fprintf(stderr, "Frames seen: %10i\n", d_frames_seen);
+ fprintf(stderr, "Sequence errors: %10i\n", d_seq_errs);
+ }
+}