path: root/src/synth_gui.c

#include "synth_gui.h"
#define RAYGUI_IMPLEMENTATION
#include "raygui.h"
//#include "raylib.h"


void
set_note(void *synthData, float note, PaTime time, int key)
{
  synth_t * synth = (synth_t *)synthData;

  synth->n.key = key;
  synth->n.freq = note;
  synth->n.noteOn = time;
  synth->n.noteOff = 0;
  synth->n.elapsed = 0;
  if (synth->poly) {
    if (!synth->notes_active) synth->adsr.elapsed = 0;
  } else {
    synth->adsr.elapsed = 0;
  }
      
  synth->active = 1;

  synth->freq[synth->notes_active]  = note;
  synth->freq_count[synth->notes_active++] = 0;
}


void
keyboard(void *synthData, PaStream *stream)
{
  synth_t * synth = (synth_t *)synthData;

  int keys[] = {KEY_Q, KEY_TWO, KEY_W, KEY_THREE, KEY_E, KEY_R, KEY_FIVE, KEY_T, KEY_SIX, KEY_Y, KEY_SEVEN, KEY_U, KEY_I, KEY_NINE, KEY_O, KEY_ZERO, KEY_P, KEY_LEFT_BRACKET, KEY_EQUAL, KEY_RIGHT_BRACKET, 0};

  float note;

  for (int i = 0; keys[i]; i++) {
    if (IsKeyPressed(keys[i])) {
      note = notes[i % 12][(synth->octave + (i / 12)) % 8];
      if (note) {
        set_note(synth, note, Pa_GetStreamTime(stream), keys[i]);
        //printf("Note On : %s[%d] %fHz\n", int_to_note(i % 12), (synth->octave + (i / 12)) % 8, note);
      }
      printf("[");
      for (int j = 0; j < synth->notes_active; j++) {
        printf("%f ", synth->freq[j]);
      }
      printf("]\n");
    }
  }
  for (int i = 0; keys[i]; i++) {
    if (IsKeyReleased(keys[i])) {
      note = notes[i % 12][(synth->octave + (i / 12)) % 8];
      int j;
      for (j = 0; j < synth->notes_active; j++) {
        // printf("Comparing freq(j): %f to note: %f\n", synth->freq[j], note);
        if (synth->freq[j] == note) {
          synth->freq[j]  = 0;
          synth->notes_active--;
          //printf("Note down %f\n", note);
          break;
        }
      }
      for (int k = j; k < synth->notes_active + 1; k++) {
        //printf("moving %f <-- %f\n", synth->freq[k], synth->freq[k + 1]);
        synth->freq[k]  = synth->freq[k + 1];
      }
      printf("[");
      for (int j = 0; j < synth->notes_active; j++) {
        printf("%f ", synth->freq[j]);
      }
      printf("]\n");
      if (synth->n.key == keys[i]) {
        synth->n.noteOff = Pa_GetStreamTime(stream);
        //printf("Note Off: %s[%d]\n", int_to_note(i % 12), (synth->octave + (i / 12)) % 8);
      }
    }
  }
}

void
draw_adsr_sliders(synth_t * synth, int x, int y, int width, int height, int offset)
{
  char buf[64];
  int count = 0;
  
  snprintf(buf, sizeof buf, "%.3f", synth->adsr.a);
  synth->adsr.a = GuiSlider((Rectangle){ x, y + count++ * (height + offset), width, height }, "A: ", buf, synth->adsr.a , 0.0f, 2.0f);
  snprintf(buf, sizeof buf, "%.3f", synth->adsr.peak);
  synth->adsr.peak = GuiSlider((Rectangle){ x, y + count++ * (height + offset), width, height }, "P: ", buf, synth->adsr.peak , 0.0f, 1.0f);
  snprintf(buf, sizeof buf, "%.3f", synth->adsr.d);
  synth->adsr.d = GuiSlider((Rectangle){ x, y + count++ * (height + offset), width, height }, "D: ", buf, synth->adsr.d , 0.001f, 2.0f);
  snprintf(buf, sizeof buf, "%.3f", synth->adsr.s);
  synth->adsr.s = GuiSlider((Rectangle){ x, y + count++ * (height + offset), width, height }, "S: ", buf, synth->adsr.s , 0.0f, 1.0f);
  snprintf(buf, sizeof buf, "%.3f", synth->adsr.r);
  synth->adsr.r = GuiSlider((Rectangle){ x, y + count++ * (height + offset), width, height }, "R: ", buf, synth->adsr.r , -0.001f, 3.0f);
  snprintf(buf, sizeof buf, "%.3f", synth->cutoff);
  synth->cutoff = GuiSliderBar((Rectangle){ x, y + count++ * (height + offset), width, height }, "fC: ", buf, synth->cutoff , 0.0f, 11000.0f);
  snprintf(buf, sizeof buf, "%.3f", synth->resonance);
  synth->resonance = GuiSliderBar((Rectangle){ x, y + count++ * (height + offset), width, height }, "fR: ", buf, synth->resonance , 0.001f, 5.0f);
}

void
draw_signals(synth_t * synth, int x, int y, int width, int height)
{
  DrawRectangleLines(x, y, width, height, BLACK);

  int point_radius = 1.5;

  GuiSpinner((Rectangle){ x+ 100, y - 24 - 6, 100, 24 }, "rate divider: ", &(synth->viz.sample_rate_divider), 1, 10, 0);
  int period = (1 / (synth->n.freq + 1)) * SAMPLE_RATE / synth->viz.sample_rate_divider;

  if (synth->multi) {
    for (int i = x; i < WIDTH - x; i++) {
      DrawCircle(i , y + height / 2 + floor(50 *  make_sample(i - x, synth, SAMPLE_RATE / synth->viz.sample_rate_divider, 1)), point_radius, RED);
    }
  } else {
    for (int i = x; i < WIDTH - x; i++) {
      DrawCircle(i , y + height / 2 + floor(50 *  make_sample((i - x) % period, synth, SAMPLE_RATE / synth->viz.sample_rate_divider, 1)), point_radius, RED);
    }
  }

  for (int i = x; i < WIDTH - x; i++) {
    DrawCircle(i , y + height - 1+ floor((WIDTH / 24) * - adsr_amplitude(synth, synth->adsr.elapsed)), point_radius, GREEN);
  }
  float adsr_duration = synth->adsr.a + synth->adsr.d + (synth->adsr.a + synth->adsr.d + synth->adsr.r) / 3.0 + synth->adsr.r;
  for (int i = x; i < WIDTH - x; i++) {
    DrawCircle(i , y + height - 1 + floor((WIDTH / 24) * - adsr_amplitude(synth, (i - x) * (adsr_duration * SAMPLE_RATE) / WIDTH)), point_radius, BLUE);
  }
}

void
rayrun(void *synthData, PaStream *stream)
{
  synth_t * synth = (synth_t *)synthData;
  PaTime current_time = 0;
  PaTime prev_time = 0;

  InitWindow(WIDTH, HEIGHT, "Raylib synth");
  SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
  while (!WindowShouldClose()) {

    keyboard(synth, stream);
    int prec = 100000;

    if (IsKeyPressed(KEY_ENTER)) {
      synth->multi = !synth->multi;
    }

    // Draw
    //----------------------------------------------------------------------------------
    BeginDrawing();
    ClearBackground(RAYWHITE);

    // GUI
    char buf[64];

    draw_adsr_sliders(synth, 30, 20, 256, 20, 4);


    if ( GuiButton((Rectangle){ WIDTH / 2 - 108, 150 - 42 - 6 - 6, 216, 6 }, "")) {
      synth->freq_offset = 0;
    }
    snprintf(buf, sizeof buf, "%.1f", synth->freq_offset);
    synth->freq_offset = GuiSlider((Rectangle){ WIDTH / 2 - 108, 150 - 42, 216, 24 }, "fine", buf, synth->freq_offset , -20.0f, 20.0f);

    if ( GuiButton((Rectangle){ WIDTH / 2 - 108, 150 - 6 - 6, 216, 6 }, "")) {
      synth->gain = 1;
    }
    snprintf(buf, sizeof buf, "%.1f", synth->gain);
    synth->gain = GuiSlider((Rectangle){ WIDTH / 2 - 108, 150, 216, 24 }, "gain", buf, synth->gain , 0.0f, 2.0f);

    if ( GuiButton((Rectangle){ WIDTH / 2 - 108, 150 - 6 - 6 + 42, 216, 6 }, "")) {
      synth->x = 1;
    }
    snprintf(buf, sizeof buf, "%.1f", synth->x);
    synth->x = GuiSlider((Rectangle){ WIDTH / 2 - 108, 150 + 42, 216, 24 }, "x", buf, synth->x , 0.0f, 2.0f);

    synth->multi = GuiToggle((Rectangle){ WIDTH - 100 - 50 - 100 - 50 , 50, 100, 24 }, "!MULTI!", synth->multi);
    synth->filter = GuiToggle((Rectangle){ WIDTH - 100 - 50 - 100 - 50 , 50 + 24 + 6, 100, 24 }, "FILTER", synth->filter);
    synth->poly = GuiToggle((Rectangle){ WIDTH - 100 - 50 - 100 - 50 , 50 + 24 + 6 + 24 + 6, 100, 24 }, "POLY", synth->poly);

    GuiSpinner((Rectangle){ WIDTH - 100 - 50 , 50, 100, 24 }, "oct: ", &(synth->octave), 0, 7, 0);
    snprintf(buf, sizeof buf, "generator %d  --> ", synth->geni);
    GuiSpinner((Rectangle){ WIDTH - 100 - 50 , 50 + 24 + 6, 100, 24 }, buf, &(synth->geni), 0, 3, 0);

    synth->clamp = GuiToggle((Rectangle){ WIDTH - 100 - 50, 50 + 24 + 6 + 24 + 6, 100, 24 }, "clamp", synth->clamp);


    // signals
    draw_signals(synth, 20, 390, WIDTH - 2*20, 200);

    DrawText("THE SYNTH!!!!!!!!!!!!!!!!!!1", WIDTH / 2 - 100, 50, 20, LIGHTGRAY);
    DrawText("KEYBOARD: Q .. ]    TOGGLE MULTI: ENTER", WIDTH / 2 -300, HEIGHT - 20 - 50, 20, LIGHTGRAY);
    snprintf(buf, sizeof buf, "time?: %lld adsr: %lld note: %lld", synth->adsr.elapsed / SAMPLE_RATE, synth->adsr.elapsed, synth->n.elapsed);
    DrawText(buf, WIDTH / 2 -300, HEIGHT - 40 - 50, 20, LIGHTGRAY);

    EndDrawing();
    //----------------------------------------------------------------------------------

    current_time = Pa_GetStreamTime(stream);
    //printf("%f :: %ld\n", current_time - prev_time, phase);

    prev_time = current_time;
  }
  CloseWindow();
}