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stats.h
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stats.h
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// Part of dump1090, a Mode S message decoder for RTLSDR devices.
//
// stats.h: statistics structures and prototypes.
//
// Copyright (c) 2015 Oliver Jowett <[email protected]>
// Copyright (c) 2021 FlightAware LLC
//
// This file is free software: you may copy, redistribute and/or modify it
// under the terms of the GNU General Public License as published by the
// Free Software Foundation, either version 2 of the License, or (at your
// option) any later version.
//
// This file 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 this program. If not, see <http://www.gnu.org/licenses/>.
// This file incorporates work covered by the following copyright and
// permission notice:
//
// Copyright (C) 2012 by Salvatore Sanfilippo <[email protected]>
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef DUMP1090_STATS_H
#define DUMP1090_STATS_H
struct stats {
uint64_t start;
uint64_t end;
// Mode S demodulator counts:
uint32_t demod_preambles;
uint32_t demod_rejected_bad;
uint32_t demod_rejected_unknown_icao;
uint32_t demod_accepted[MODES_MAX_BITERRORS+1];
// Mode A/C demodulator counts:
uint32_t demod_modeac;
uint64_t samples_processed;
uint64_t samples_dropped;
// SDR settings:
int sdr_gain; // current gain step in use
// timing:
struct timespec demod_cpu;
struct timespec reader_cpu;
struct timespec background_cpu;
// noise floor:
double noise_power_sum;
uint64_t noise_power_count;
// mean signal power:
double signal_power_sum;
uint64_t signal_power_count;
// peak signal power seen
double peak_signal_power;
// number of signals with power > -3dBFS
uint32_t strong_signal_count;
// remote messages:
uint32_t remote_received_modeac;
uint32_t remote_received_modes;
uint32_t remote_rejected_bad;
uint32_t remote_rejected_unknown_icao;
uint32_t remote_accepted[MODES_MAX_BITERRORS+1];
// total messages:
uint32_t messages_total;
// .. divided by DF
uint32_t messages_by_df[32];
// CPR decoding:
unsigned int cpr_surface;
unsigned int cpr_airborne;
unsigned int cpr_global_ok;
unsigned int cpr_global_bad;
unsigned int cpr_global_skipped;
unsigned int cpr_global_range_checks;
unsigned int cpr_global_speed_checks;
unsigned int cpr_local_ok;
unsigned int cpr_local_skipped;
unsigned int cpr_local_range_checks;
unsigned int cpr_local_speed_checks;
unsigned int cpr_local_aircraft_relative;
unsigned int cpr_local_receiver_relative;
unsigned int cpr_filtered;
// number of altitude messages ignored because
// we had a recent DF17/18 altitude
unsigned int suppressed_altitude_messages;
// aircraft:
// total "new" aircraft (i.e. not seen in the last 30 or 300s)
unsigned int unique_aircraft;
// we saw only a single message
unsigned int single_message_aircraft;
// we never considered the track reliable
unsigned int unreliable_aircraft;
// range histogram
#define RANGE_BUCKET_COUNT 76
uint32_t range_histogram[RANGE_BUCKET_COUNT];
// adaptive gain measurements
#define STATS_GAIN_COUNT 64
bool adaptive_valid; // is the following data valid?
uint32_t adaptive_gain_seconds[STATS_GAIN_COUNT]; // Seconds spent at each gain step
uint32_t adaptive_loud_undecoded; // Total number of loud, undecoded bursts
uint32_t adaptive_loud_decoded; // Total number of loud, decoded messages
uint32_t adaptive_gain_changes; // Total number of gain changes caused by adaptive gain control
double adaptive_noise_dbfs; // Current adaptive-dynamic-range smoothed noise measurement, dBFS
int adaptive_range_gain_limit; // Current adaptive-dynamic-range gain step limit
};
void add_stats(const struct stats *st1, const struct stats *st2, struct stats *target);
void display_stats(struct stats *st);
void reset_stats(struct stats *st);
void add_timespecs(const struct timespec *x, const struct timespec *y, struct timespec *z);
#endif