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rearrange variables, add needle ui, use builtin note arrays, code style

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Eknous-P 2025-08-21 22:30:26 +04:00
parent e9e94949ea
commit c7c3637b1b
4 changed files with 147 additions and 84 deletions
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118
src/gui/tuner.cpp
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@ -19,14 +19,11 @@
#define _USE_MATH_DEFINES
#include "gui.h"
#include "../ta-log.h"
#include "imgui.h"
#include "imgui_internal.h"
#include "misc/cpp/imgui_stdlib.h"
#define FURNACE_FFT_SIZE 16384//4096
#define FURNACE_FFT_RATE 80.0
#define FURNACE_FFT_CUTOFF 0.1
#define FURNACE_TUNER_FFT_SIZE 8192
void FurnaceGUI::drawTuner() {
if (nextWindow == GUI_WINDOW_TUNER) {
@ -38,40 +35,39 @@ void FurnaceGUI::drawTuner() {
if (ImGui::Begin("Tuner", &tunerOpen, globalWinFlags, _("Tuner"))) {
//fft buffer
static double inBuf[FURNACE_FFT_SIZE];
static fftw_complex outBuf[FURNACE_FFT_SIZE];
static fftw_plan plan=nullptr;
if (!tunerFFTInBuf) tunerFFTInBuf=new double[FURNACE_TUNER_FFT_SIZE];
if (!tunerFFTOutBuf) tunerFFTOutBuf=(fftw_complex*)fftw_malloc(sizeof(fftw_complex)*FURNACE_TUNER_FFT_SIZE);
if (!plan) {
plan=fftw_plan_dft_r2c_1d(FURNACE_FFT_SIZE, inBuf, outBuf, FFTW_ESTIMATE);
if (!tunerPlan) {
tunerPlan=fftw_plan_dft_r2c_1d(FURNACE_TUNER_FFT_SIZE, tunerFFTInBuf, tunerFFTOutBuf, FFTW_ESTIMATE);
}
int chans=e->getAudioDescGot().outChans;
int needle=e->oscWritePos;
int needle=e->oscReadPos;
for (int j=0; j<FURNACE_FFT_SIZE; j++) {
int pos=(needle-j) & 0x7fff;
for (int j=0; j<FURNACE_TUNER_FFT_SIZE; j++) {
int pos=(needle-FURNACE_TUNER_FFT_SIZE+j) & 0x7fff;
double sample=0.0;
for (int ch=0; ch<chans; ch++) {
sample+=e->oscBuf[ch][pos];
}
sample=sample/chans;
inBuf[j]=sample * (0.5 * (1.0 - cos(2.0 * M_PI * j / (FURNACE_FFT_SIZE - 1))));
tunerFFTInBuf[j]=sample*(0.5*(1.0-cos(2.0*M_PI*j/(FURNACE_TUNER_FFT_SIZE-1))));
}
fftw_execute(plan);
fftw_execute(tunerPlan);
std::vector<double> mag(FURNACE_FFT_SIZE / 2);
for (int k=0; k < FURNACE_FFT_SIZE / 2; k++) {
mag[k]=sqrt(outBuf[k][0]*outBuf[k][0]+outBuf[k][1]*outBuf[k][1]);
std::vector<double> mag(FURNACE_TUNER_FFT_SIZE/2);
for (int k=0; k < FURNACE_TUNER_FFT_SIZE / 2; k++) {
mag[k]=sqrt(tunerFFTOutBuf[k][0]*tunerFFTOutBuf[k][0]+tunerFFTOutBuf[k][1]*tunerFFTOutBuf[k][1]);
}
//harmonic product spectrum
int harmonics = 2;
for (int h = 2; h <= harmonics; h++) {
for (int k = 0; k < FURNACE_FFT_SIZE / (2 * h); k++) {
mag[k] *= mag[k * h];
int harmonics=2;
for (int h=2; h<=harmonics; h++) {
for (int k=0; k<FURNACE_TUNER_FFT_SIZE/(2*h); k++) {
mag[k]*=mag[k*h];
}
}
@ -85,40 +81,68 @@ void FurnaceGUI::drawTuner() {
double beta = mag[peakIndex];
double gamma = mag[peakIndex + 1];
double p = 0.5 * (alpha - gamma) / (alpha - 2.0 * beta + gamma);
freq = (peakIndex + p) * (sampleRate / (double)FURNACE_FFT_SIZE);
freq = (peakIndex + p) * (sampleRate / (double)FURNACE_TUNER_FFT_SIZE);
}
else {
freq = (double)peakIndex * (sampleRate / (double)FURNACE_FFT_SIZE);
freq = (double)peakIndex * (sampleRate / (double)FURNACE_TUNER_FFT_SIZE);
}
//tuning formulas
double noteExact=0;
int noteRounded=0;
double cents=0.0f;
if (freq > 0 && freq < 5000.0) {
double noteExact = log2(freq / 440.0) * 12.0 + 45.0;
int noteRounded = (int)std::round(noteExact);
int noteInOct = noteRounded % 12;
if (noteInOct < 0) noteInOct += 12;
int octave = noteRounded / 12;
if (noteRounded < 0 && (noteRounded % 12)) --octave;
double cents = (noteExact - noteRounded) * 100.0;
static const char* names[12] = {
"C","C#","D","D#","E","F","F#","G","G#","A","A#","B"
};
ImGui::Text("Note: %s%d", names[noteInOct], octave);
ImGui::Text("Freq: %.2f Hz", freq);
ImGui::Text("Cents offset: %+0.1f", cents);
noteExact=CLAMP(log2(freq / e->song.tuning) * 12.0 + 117.0,0,180);
noteRounded=round(noteExact);
cents=noteExact-noteRounded;
}
else {
ImGui::Text("Note: -");
ImGui::Text("Freq: 0.00 Hz");
ImGui::Text("Cents offset: +0.0");
String noteText=fmt::sprintf("%s",(freq > 0 && freq < 5000.0)?noteName(noteExact):"---");
ImGui::Text("Note: %s", noteText.c_str());
ImGui::Text("Freq: %f Hz", freq);
ImGui::Text("Cents: %f ", cents*100.0f);
{
ImDrawList* dl=ImGui::GetWindowDrawList();
ImVec2 origin=ImGui::GetWindowPos();
ImVec2 size=ImGui::GetWindowSize();
float titleBar = ImGui::GetCurrentWindow()->TitleBarHeight;
origin.y+=titleBar;
size.y-=titleBar;
// debug stuff
ImVec2* plot=new ImVec2[FURNACE_TUNER_FFT_SIZE];
for (size_t i=0; i<FURNACE_TUNER_FFT_SIZE; i++) {
plot[i].x=origin.x+size.x*((float)i/FURNACE_TUNER_FFT_SIZE);
plot[i].y=origin.y+size.y-size.y*(tunerFFTInBuf[i]+1.0f)/2.0f;
}
dl->AddPolyline(plot, FURNACE_TUNER_FFT_SIZE, 0xff00ff00, 0, 1.0f);
for (size_t i=0; i<mag.size(); i++) {
plot[i].x=origin.x+size.x*((float)i/mag.size());
plot[i].y=origin.y+size.y-size.y*mag[i]/FURNACE_TUNER_FFT_SIZE;
}
dl->AddPolyline(plot, mag.size(), 0xffffffff, 0, 1.0f);
delete[] plot;
ImVec2 needleCenter=origin+ImVec2(size.x/2,size.y/4*3);
float needleLength = (size.x/2)*0.9f;
const float halfSpan=0.7; // radians
const float trim=.2;
float angle=cents*halfSpan;
ImVec2 needleTip = needleCenter + ImVec2(
needleLength*sin(angle),
-needleLength*cos(angle)
);
// text
ImGui::PushFont(bigFont);
ImVec2 textSize=ImGui::CalcTextSize(noteText.c_str());
dl->AddText(needleCenter-ImVec2(textSize.x/2.0f,textSize.y/2.0f),ImGui::ColorConvertFloat4ToU32(uiColors[GUI_COLOR_TEXT]),noteText.c_str());
ImGui::PopFont();
// needle
needleCenter = needleCenter+ImVec2(
needleLength*sin(angle)*trim,
-needleLength*cos(angle)*trim
);
dl->AddLine(needleCenter, needleTip, 0xff00ffff, 2.0f);
}
}