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/*
Copyright (C) 2024 Matthias P. Braendli (http://www.opendigitalradio.org)
This program 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 of the License, or
(at your option) any later version.
This program 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/>.
Authors:
Matthias P. Braendli <matthias@mpb.li>
*/
#include "repetitionrate.hpp"
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <sstream>
#include <string>
#include <vector>
#include <array>
#include <map>
#include <set>
using namespace std;
const double FRAME_DURATION = 24e-3;
struct FIGTypeExt {
int figtype;
int figextension;
bool operator<(const FIGTypeExt& other) const {
if (this->figtype == other.figtype) {
return this->figextension < other.figextension;
}
else {
return this->figtype < other.figtype ;
}
}
};
struct FIGRateInfo {
// List of frame numbers in which the FIG is present
vector<int> frames_present;
// List of frame numbers in which a complete DB for that FIG has been sent
vector<int> frames_complete;
// Which FIBs this FIG was seen in
set<int> in_fib;
vector<uint8_t> lengths;
};
static map<FIGTypeExt, FIGRateInfo> fig_rates;
static int current_frame_number = 0;
static int current_fib = 0;
void rate_announce_fig(int figtype, int figextension, bool complete, uint8_t figlen)
{
FIGTypeExt f = {.figtype = figtype, .figextension = figextension};
if (fig_rates.count(f) == 0) {
FIGRateInfo rate;
fig_rates[f] = rate;
}
FIGRateInfo& rate = fig_rates[f];
rate.frames_present.push_back(current_frame_number);
if (complete) {
rate.frames_complete.push_back(current_frame_number);
}
rate.in_fib.insert(current_fib);
rate.lengths.push_back(figlen);
}
static double rate_avg(
const std::vector<int>& fig_positions,
bool per_second)
{
// Average interval is 1/N \sum_{i} pos_{i+1} - pos_{i}
// but this sums out all the intermediate pos_{i}, leaving us
// with 1/N (pos_{last} - pos_{first})
//
// N = size - 1 because we sum intervals, not points in time,
// and there's one less interval than there are points.
double avg =
(double)(fig_positions.back() - fig_positions.front()) /
(double)(fig_positions.size() - 1);
if (per_second) {
avg = 1.0 / (avg * FRAME_DURATION);
}
return avg;
}
static double length_avg(const std::vector<uint8_t>& lengths)
{
double avg = 0.0;
for (const uint8_t l : lengths) {
avg += l;
}
return avg / (double)lengths.size();
}
static string length_histogram(const std::vector<uint8_t>& lengths)
{
const array<const char*, 7> hist_chars({"▁", "▂", "▃", "▄", "▅", "▆", "▇"});
// FIB length is 30
vector<size_t> histogram(30);
for (const uint8_t l : lengths) {
histogram.at(l)++;
}
const double max_hist = *std::max_element(histogram.cbegin(), histogram.cend());
stringstream ss;
ss << "[";
for (const size_t h : histogram) {
uint8_t char_ix = floor((double)h / (max_hist+1) * hist_chars.size());
ss << hist_chars.at(char_ix);
}
ss << "]";
return ss.str();
}
void rate_display_analysis(bool per_second)
{
#define GREPPABLE_PREFIX "CAROUSEL "
if (per_second) {
printf(GREPPABLE_PREFIX
"FIG T/EXT AVG (COUNT) - AVG (COUNT) - LEN - LENGTH HISTOGRAM IN FIB(S)\n");
}
for (auto& fig_rate : fig_rates) {
auto& frames_present = fig_rate.second.frames_present;
auto& frames_complete = fig_rate.second.frames_complete;
const size_t n_present = frames_present.size();
const size_t n_complete = frames_complete.size();
printf(GREPPABLE_PREFIX);
if (n_present >= 2) {
double avg = rate_avg(frames_present, per_second);
printf("FIG%2d/%2d %6.2f (%5zu)",
fig_rate.first.figtype, fig_rate.first.figextension,
avg,
n_present);
if (n_complete >= 2) {
double avg = rate_avg(frames_complete, per_second);
printf(" - %6.2f (%5zu)", avg, n_complete);
}
else {
printf(" - None complete");
}
}
else {
printf("FIG%2d/%2d ",
fig_rate.first.figtype, fig_rate.first.figextension);
}
printf(" - %4.1f %s - ",
length_avg(fig_rate.second.lengths),
length_histogram(fig_rate.second.lengths).c_str());
for (auto& fib : fig_rate.second.in_fib) {
printf(" %d", fib);
}
printf("\n");
}
}
void rate_new_fib(int fib)
{
if (fib == 0) {
current_frame_number++;
}
current_fib = fib;
}
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