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/*
* CoachController.cpp
*
* Created on: 7 May 2017
* Author: jeremy
*/
#include "CoachController.h"
#include <gtkmm/grid.h>
#include <glibmm/main.h>
#include <gtkmm/label.h>
#include <chrono>
#include <numeric>
#include <algorithm>
using namespace std::chrono;
namespace Controllers
{
CoachController::CoachController(Glib::RefPtr<Gtk::Builder> builder, std::shared_ptr<eXaDrumsApi::eXaDrums> drumKit)
: builder(builder), drumKit(std::move(drumKit))
{
// Get all widgets
{
this->builder->get_widget("CoachWindow", coachWindow);
this->builder->get_widget("CoachButton", coachButton);
this->builder->get_widget("CoachCloseButton", coachCloseButton);
this->builder->get_widget("ClickMeter", clickMeter);
this->builder->get_widget("CoachJitterMeter", jitterMeter);
this->builder->get_widget("HitMeterBar", hitMeterBar);
this->builder->get_widget("CoachScore", scoreLabel);
}
// Connect all signals
{
coachButton->signal_clicked().connect([&]{ OpenRhythmCoach(); });
coachCloseButton->signal_clicked().connect([&]{ CloseRhythmCoach(); });
}
scores.resize(4);
std::fill(scores.begin(), scores.end(), 0);
hitMeterBar->set_min_value(0.);
hitMeterBar->set_max_value(1.);
return;
}
CoachController::~CoachController()
{
delete coachWindow;
return;
}
bool CoachController::UpdateCoach()
{
double clickPos = drumKit->GetClickPosition();
int bpm = drumKit->GetBpmeas();
double beatPos = clickPos * bpm;
double beatFraction = beatPos - int(beatPos);
beatFraction = std::min<double>(std::max<double>(0.0, beatFraction), 1.0);
double clickFraction = clickPos - int(clickPos);
// Update click section
{
if(int(beatPos) % 2 != 0)
{
this->clickMeter->set_inverted(false);
}
else
{
this->clickMeter->set_inverted(true);
}
// Clip fraction's value
this->clickMeter->set_value(100*beatFraction);
}
// Update LEDs states
{
Gtk::Label* greenLed = nullptr;
Gtk::Label* redLed = nullptr;
this->builder->get_widget("CoachGreenLed", greenLed);
this->builder->get_widget("CoachRedLed", redLed);
double th = 0.2;
if(beatFraction < th)
{
greenLed->set_visible(true);
}
else
{
greenLed->set_visible(false);
}
if(clickFraction < th / double(bpm))
{
redLed->set_visible(true);
}
else
{
redLed->set_visible(false);
}
}
// Update hit meter section
long long lastTrigTime = drumKit->GetLastTrigTime();
high_resolution_clock::time_point now = high_resolution_clock::now();
long long t = (long long) time_point_cast<microseconds>(now).time_since_epoch().count();
{
long long dt = (t - lastTrigTime);
double fraction = std::exp(-double(dt) / 200000.0);
double value = double(drumKit->GetLastTrigValue()) / 100.0;
auto val = std::max(value * fraction, 0.);
if(val < 0.01)
val = 0.;
hitMeterBar->set_value(val);
}
// Check accuracy
{
long long lastClickTime = drumKit->GetLastClickTime();
int tempo = drumKit->GetTempo();
double measureDuration = bpm * 60e6 / double(tempo) / drumKit->GetRhythm(); // Measure duration in µs
const auto dtTime = std::abs(lastTrigTime - prevLastTrigTime);
const bool isComputeScore = dtTime <= measureDuration && lastTrigTime != prevLastTrigTime;
// Create vector of the clicks times
std::vector<long long> clicksTimes(bpm + 1);
for(std::size_t i = 0; i < clicksTimes.size(); i++)
{
clicksTimes[i] = lastClickTime + (long long)(i * (measureDuration / bpm));
}
std::vector<int> offsets(clicksTimes.size());
std::transform(clicksTimes.begin(), clicksTimes.end(), offsets.begin(), [&](long long v) { return int(lastTrigTime - v); });
// Find the most accurate hit's error
int bestHitError = *std::min_element(offsets.begin(), offsets.end(), [](int x, int y) { return std::abs(x) < std::abs(y); });
int maxError = int(measureDuration / bpm);
int jitterValue = -(100 * bestHitError) / maxError + 50;
jitterValue = std::clamp(jitterValue, 0, 100);
int relScore = 2 * (50 - std::abs(jitterValue - 50.));
if(isComputeScore)
{
scores[scoreIndex % scores.size()] = relScore;
scoreIndex = (scoreIndex + 1) % scores.size();
}
prevLastTrigTime = lastTrigTime;
int avgScore = std::accumulate(scores.begin(), scores.end(), int{0}) / scores.size();
scoreLabel->set_text(std::to_string(avgScore));
jitterMeter->set_value(jitterValue);
}
return true;
}
void CoachController::OpenRhythmCoach()
{
coachTimeout = Glib::signal_timeout().connect(sigc::mem_fun(this, &CoachController::UpdateCoach), 20);
coachWindow->show();
return;
}
void CoachController::CloseRhythmCoach()
{
coachWindow->hide();
coachTimeout.disconnect();
return;
}
} /* namespace Controllers */
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