Grid synth engine
This commit is contained in:
Dejvino
parent
f80daed222
commit
e86c06e05f
382
main.cpp
382
main.cpp
@ -14,8 +14,10 @@
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// --- Configuration ---
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const uint32_t SAMPLE_RATE = 44100;
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const uint32_t CHANNELS = 1; // Mono
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const int WINDOW_WIDTH = 800;
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const int WINDOW_HEIGHT = 600;
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const int GRID_PANEL_WIDTH = 400;
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const int SYNTH_PANEL_WIDTH = 800;
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const int WINDOW_WIDTH = GRID_PANEL_WIDTH + SYNTH_PANEL_WIDTH; // 1200
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const int WINDOW_HEIGHT = 640;
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// --- Visualization Buffer ---
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const size_t VIS_BUFFER_SIZE = 8192;
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@ -25,9 +27,6 @@ std::atomic<size_t> vis_write_index{0};
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// --- Control State ---
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int current_octave = 4; // C4 is middle C
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float knob_vol_val = 0.5f;
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SynthEngine::Waveform current_waveform = SynthEngine::SAWTOOTH;
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const char* waveform_names[] = {"Saw", "Square", "Sine"};
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// ADSR (A, D, R in seconds, S in 0-1)
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float adsr_vals[4] = {0.05f, 0.2f, 0.6f, 0.5f};
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float filter_vals[2] = {1.0f, 0.0f}; // LP (1.0=Open), HP (0.0=Open)
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@ -128,31 +127,6 @@ void drawKnob(SDL_Renderer* renderer, int x, int y, int radius, float value) {
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SDL_RenderDrawLine(renderer, x, y, x2, y2);
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}
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void drawWaveformIcon(SDL_Renderer* renderer, int x, int y, int w, int h, SynthEngine::Waveform wf) {
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SDL_SetRenderDrawColor(renderer, 200, 200, 200, 255);
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switch(wf) {
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case SynthEngine::SAWTOOTH:
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SDL_RenderDrawLine(renderer, x, y+h, x+w, y); // Ramp up
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SDL_RenderDrawLine(renderer, x+w, y, x+w, y+h); // Drop down
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break;
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case SynthEngine::SQUARE:
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SDL_RenderDrawLine(renderer, x, y+h, x, y); // Rise
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SDL_RenderDrawLine(renderer, x, y, x+w, y); // High
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SDL_RenderDrawLine(renderer, x+w, y, x+w, y+h); // Drop
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break;
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case SynthEngine::SINE: {
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int prev_x = x, prev_y = y + h/2;
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for (int i = 1; i <= w; ++i) {
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int px = x + i;
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int py = y + h/2 - (int)(sin(i * 2.0 * M_PI / w) * h/2.0f);
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SDL_RenderDrawLine(renderer, prev_x, prev_y, px, py);
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prev_x = px; prev_y = py;
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}
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break;
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}
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}
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}
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void drawToggle(SDL_Renderer* renderer, int x, int y, int size, bool active) {
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// Draw box
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SDL_Rect rect = {x - size/2, y - size/2, size, size};
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@ -193,6 +167,191 @@ void drawSlider(SDL_Renderer* renderer, int x, int y, int w, int h, float val, c
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SDL_RenderDrawRect(renderer, &handle);
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}
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// --- Simple Vector Font ---
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void drawChar(SDL_Renderer* renderer, int x, int y, int size, char c) {
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int w = size * 0.6;
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int h = size;
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int h2 = h / 2;
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int w2 = w / 2;
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switch(c) {
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case '0': SDL_RenderDrawLine(renderer, x, y, x+w, y); SDL_RenderDrawLine(renderer, x+w, y, x+w, y+h); SDL_RenderDrawLine(renderer, x+w, y+h, x, y+h); SDL_RenderDrawLine(renderer, x, y+h, x, y); break;
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case '1': SDL_RenderDrawLine(renderer, x+w2, y, x+w2, y+h); break;
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case '2': SDL_RenderDrawLine(renderer, x, y, x+w, y); SDL_RenderDrawLine(renderer, x+w, y, x+w, y+h2); SDL_RenderDrawLine(renderer, x+w, y+h2, x, y+h2); SDL_RenderDrawLine(renderer, x, y+h2, x, y+h); SDL_RenderDrawLine(renderer, x, y+h, x+w, y+h); break;
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case '3': SDL_RenderDrawLine(renderer, x, y, x+w, y); SDL_RenderDrawLine(renderer, x+w, y, x+w, y+h); SDL_RenderDrawLine(renderer, x, y+h2, x+w, y+h2); SDL_RenderDrawLine(renderer, x, y+h, x+w, y+h); break;
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case '4': SDL_RenderDrawLine(renderer, x, y, x, y+h2); SDL_RenderDrawLine(renderer, x, y+h2, x+w, y+h2); SDL_RenderDrawLine(renderer, x+w, y, x+w, y+h); break;
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case '5': SDL_RenderDrawLine(renderer, x+w, y, x, y); SDL_RenderDrawLine(renderer, x, y, x, y+h2); SDL_RenderDrawLine(renderer, x, y+h2, x+w, y+h2); SDL_RenderDrawLine(renderer, x+w, y+h2, x+w, y+h); SDL_RenderDrawLine(renderer, x+w, y+h, x, y+h); break;
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case '6': SDL_RenderDrawLine(renderer, x+w, y, x, y); SDL_RenderDrawLine(renderer, x, y, x, y+h); SDL_RenderDrawLine(renderer, x, y+h2, x+w, y+h2); SDL_RenderDrawLine(renderer, x, y+h, x+w, y+h); SDL_RenderDrawLine(renderer, x+w, y+h2, x+w, y+h); break;
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case '7': SDL_RenderDrawLine(renderer, x, y, x+w, y); SDL_RenderDrawLine(renderer, x+w, y, x, y+h); break;
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case '8': SDL_RenderDrawLine(renderer, x, y, x+w, y); SDL_RenderDrawLine(renderer, x+w, y, x+w, y+h); SDL_RenderDrawLine(renderer, x+w, y+h, x, y+h); SDL_RenderDrawLine(renderer, x, y+h, x, y); SDL_RenderDrawLine(renderer, x, y+h2, x+w, y+h2); break;
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case '9': SDL_RenderDrawLine(renderer, x+w, y+h, x+w, y); SDL_RenderDrawLine(renderer, x+w, y, x, y); SDL_RenderDrawLine(renderer, x, y, x, y+h2); SDL_RenderDrawLine(renderer, x, y+h2, x+w, y+h2); break;
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case '.': SDL_RenderDrawPoint(renderer, x+w2, y+h-2); break;
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case '+': SDL_RenderDrawLine(renderer, x, y+h2, x+w, y+h2); SDL_RenderDrawLine(renderer, x+w2, y, x+w2, y+h); break;
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case '-': SDL_RenderDrawLine(renderer, x, y+h2, x+w, y+h2); break;
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case '*': SDL_RenderDrawLine(renderer, x, y, x+w, y+h); SDL_RenderDrawLine(renderer, x+w, y, x, y+h); break; // X
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case '/': SDL_RenderDrawLine(renderer, x+w, y, x, y+h); break;
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case '<': SDL_RenderDrawLine(renderer, x+w, y, x, y+h2); SDL_RenderDrawLine(renderer, x, y+h2, x+w, y+h); break;
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case '>': SDL_RenderDrawLine(renderer, x, y, x+w, y+h2); SDL_RenderDrawLine(renderer, x+w, y+h2, x, y+h); break;
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case 'F': SDL_RenderDrawLine(renderer, x, y, x, y+h); SDL_RenderDrawLine(renderer, x, y, x+w, y); SDL_RenderDrawLine(renderer, x, y+h2, x+w2, y+h2); break;
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case 'O': drawChar(renderer, x, y, size, '0'); break;
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}
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}
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void drawString(SDL_Renderer* renderer, int x, int y, int size, const char* str) {
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int cursor = x;
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while (*str) {
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drawChar(renderer, cursor, y, size, *str);
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cursor += (size * 0.6) + 4;
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str++;
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}
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}
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// --- Grid UI Helpers ---
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void drawGridCell(SDL_Renderer* renderer, int x, int y, int size, SynthEngine::GridCell& cell) {
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// Background
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SDL_Rect rect = {x, y, size, size};
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SDL_SetRenderDrawColor(renderer, 30, 30, 30, 255);
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SDL_RenderFillRect(renderer, &rect);
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SDL_SetRenderDrawColor(renderer, 100, 100, 100, 255);
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SDL_RenderDrawRect(renderer, &rect);
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int cx = x + size/2;
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int cy = y + size/2;
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int r = size/3;
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SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
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if (cell.type == SynthEngine::GridCell::EMPTY) {
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SDL_RenderDrawPoint(renderer, cx, cy);
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} else if (cell.type == SynthEngine::GridCell::SINK) {
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SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
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SDL_Rect sinkRect = {cx - r, cy - r, r*2, r*2};
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SDL_RenderFillRect(renderer, &sinkRect);
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} else if (cell.type == SynthEngine::GridCell::WIRE) {
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// Draw center
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SDL_RenderDrawPoint(renderer, cx, cy);
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// Direction line
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int dx=0, dy=0;
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if (cell.rotation == 0) dy = -r;
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if (cell.rotation == 1) dx = r;
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if (cell.rotation == 2) dy = r;
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if (cell.rotation == 3) dx = -r;
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SDL_RenderDrawLine(renderer, cx, cy, cx+dx, cy+dy);
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// Param (Fading)
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char buf[16]; snprintf(buf, 16, "%.2f", cell.param);
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SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255);
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drawString(renderer, x + 5, y + size - 15, 10, buf);
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} else if (cell.type == SynthEngine::GridCell::FIXED_OSCILLATOR) {
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DrawCircle(renderer, cx, cy, r);
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// Direction line
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int dx=0, dy=0;
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if (cell.rotation == 0) dy = -r;
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if (cell.rotation == 1) dx = r;
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if (cell.rotation == 2) dy = r;
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if (cell.rotation == 3) dx = -r;
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SDL_RenderDrawLine(renderer, cx, cy, cx+dx, cy+dy);
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// Param (Freq)
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char buf[16];
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snprintf(buf, 16, "%.0f", 10.0f + cell.param*990.0f);
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SDL_SetRenderDrawColor(renderer, 0, 255, 255, 255);
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drawString(renderer, x + 5, y + size - 15, 10, buf);
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} else if (cell.type == SynthEngine::GridCell::INPUT_OSCILLATOR) {
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DrawCircle(renderer, cx, cy, r);
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DrawCircle(renderer, cx, cy, r/2); // Inner circle to distinguish
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// Direction line
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int dx=0, dy=0;
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if (cell.rotation == 0) dy = -r;
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if (cell.rotation == 1) dx = r;
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if (cell.rotation == 2) dy = r;
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if (cell.rotation == 3) dx = -r;
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SDL_RenderDrawLine(renderer, cx, cy, cx+dx, cy+dy);
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// Param (Octave)
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char buf[16]; snprintf(buf, 16, "O%d", 1 + (int)(cell.param * 4.99f));
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SDL_SetRenderDrawColor(renderer, 255, 200, 0, 255);
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drawString(renderer, x + 5, y + size - 15, 10, buf);
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} else if (cell.type == SynthEngine::GridCell::NOISE) {
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// Draw static/noise pattern
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for(int i=0; i<20; ++i) {
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SDL_RenderDrawPoint(renderer, x + rand()%size, y + rand()%size);
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}
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// Direction line
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int dx=0, dy=0;
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if (cell.rotation == 0) dy = -r;
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if (cell.rotation == 1) dx = r;
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if (cell.rotation == 2) dy = r;
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if (cell.rotation == 3) dx = -r;
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SDL_RenderDrawLine(renderer, cx, cy, cx+dx, cy+dy);
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// Param (Color)
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const char* colors[] = {"BRN", "PNK", "WHT", "YEL", "GRN"};
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int idx = (int)(cell.param * 4.99f);
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SDL_SetRenderDrawColor(renderer, 200, 200, 200, 255);
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drawString(renderer, x + 5, y + size - 15, 10, colors[idx]);
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} else if (cell.type == SynthEngine::GridCell::FORK) {
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// Draw Y shape based on rotation
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// Center
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SDL_RenderDrawPoint(renderer, cx, cy);
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// Input (Back)
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int inDir = (cell.rotation + 2) % 4;
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int idx=0, idy=0;
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if(inDir==0) idy=-r; else if(inDir==1) idx=r; else if(inDir==2) idy=r; else idx=-r;
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SDL_RenderDrawLine(renderer, cx, cy, cx+idx, cy+idy);
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// Outputs (Left/Right)
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int lDir = (cell.rotation + 3) % 4;
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int rDir = (cell.rotation + 1) % 4;
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int ldx=0, ldy=0, rdx=0, rdy=0;
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if(lDir==0) ldy=-r; else if(lDir==1) ldx=r; else if(lDir==2) ldy=r; else ldx=-r;
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if(rDir==0) rdy=-r; else if(rDir==1) rdx=r; else if(rDir==2) rdy=r; else rdx=-r;
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SDL_RenderDrawLine(renderer, cx, cy, cx+ldx, cy+ldy);
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SDL_RenderDrawLine(renderer, cx, cy, cx+rdx, cy+rdy);
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// Param (Balance)
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char buf[16]; snprintf(buf, 16, "%.1f", cell.param);
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SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255);
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drawString(renderer, x + 5, y + size - 15, 10, buf);
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} else if (cell.type == SynthEngine::GridCell::DELAY) {
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// Draw D
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drawString(renderer, cx - 5, cy - 5, 12, "D");
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// Input (Back)
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int inDir = (cell.rotation + 2) % 4;
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int idx=0, idy=0;
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if(inDir==0) idy=-r; else if(inDir==1) idx=r; else if(inDir==2) idy=r; else idx=-r;
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SDL_RenderDrawLine(renderer, cx+idx, cy+idy, cx, cy);
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// Output (Front)
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int outDir = cell.rotation;
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int odx=0, ody=0;
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if(outDir==0) ody=-r; else if(outDir==1) odx=r; else if(outDir==2) ody=r; else odx=-r;
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SDL_RenderDrawLine(renderer, cx, cy, cx+odx, cy+ody);
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// Param (Delay time in ms)
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char buf[16];
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float delay_ms = cell.param * 2000.0f; // Max 2 seconds
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snprintf(buf, 16, "%.0fms", delay_ms);
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SDL_SetRenderDrawColor(renderer, 255, 128, 0, 255);
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drawString(renderer, x + 5, y + size - 15, 10, buf);
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} else if (cell.type == SynthEngine::GridCell::OPERATOR) {
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SDL_Rect opRect = {cx - r, cy - r, r*2, r*2};
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SDL_RenderDrawRect(renderer, &opRect);
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int dx=0, dy=0;
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if (cell.rotation == 0) dy = -r;
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if (cell.rotation == 1) dx = r;
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if (cell.rotation == 2) dy = r;
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if (cell.rotation == 3) dx = -r;
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SDL_RenderDrawLine(renderer, cx, cy, cx+dx, cy+dy);
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// Draw Op Symbol
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char opChar = '?';
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int opType = (int)(cell.param * 5.99f);
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if (opType == 0) opChar = '+';
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else if (opType == 1) opChar = '*';
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else if (opType == 2) opChar = '-';
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else if (opType == 3) opChar = '/';
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else if (opType == 4) opChar = '<';
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else if (opType == 5) opChar = '>';
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drawChar(renderer, cx - 5, cy - 5, 12, opChar);
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}
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}
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int main(int argc, char* argv[]) {
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(void)argc; (void)argv;
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@ -204,7 +363,7 @@ int main(int argc, char* argv[]) {
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return -1;
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}
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SDL_Window* window = SDL_CreateWindow("NoiceSynth Scope", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_SHOWN);
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SDL_Window* window = SDL_CreateWindow("NoiceSynth Integrated", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_SHOWN);
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if (!window) return -1;
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SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
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@ -280,11 +439,101 @@ int main(int argc, char* argv[]) {
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while (SDL_PollEvent(&e) != 0) {
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if (e.type == SDL_QUIT) {
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quit = true;
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} else if (e.type == SDL_MOUSEWHEEL) {
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int mouseX, mouseY;
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SDL_GetMouseState(&mouseX, &mouseY);
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} else if (e.type == SDL_WINDOWEVENT && e.window.event == SDL_WINDOWEVENT_CLOSE) {
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quit = true; // Close app if any window closes
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}
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if (mouseX < WINDOW_WIDTH / 2) { // Left knob (Octave)
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// --- Mouse Handling ---
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// Check if event is in Grid Panel (Left) or Synth Panel (Right)
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if (e.type == SDL_MOUSEBUTTONDOWN) {
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int mx = e.button.x;
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int my = e.button.y;
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if (mx < GRID_PANEL_WIDTH) {
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int gx = mx / 80;
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int gy = my / 80;
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if (gx >= 0 && gx < 5 && gy >= 0 && gy < 8) {
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std::lock_guard<std::mutex> lock(engine.gridMutex);
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SynthEngine::GridCell& c = engine.grid[gx][gy];
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if (c.type != SynthEngine::GridCell::SINK) {
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SynthEngine::GridCell::Type oldType = c.type;
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SynthEngine::GridCell::Type newType = oldType;
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if (e.button.button == SDL_BUTTON_LEFT) {
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// Cycle: EMPTY -> FIXED -> INPUT -> NOISE -> FORK -> WIRE -> OP -> DELAY -> EMPTY
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if (oldType == SynthEngine::GridCell::EMPTY) newType = SynthEngine::GridCell::FIXED_OSCILLATOR;
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else if (oldType == SynthEngine::GridCell::FIXED_OSCILLATOR) newType = SynthEngine::GridCell::INPUT_OSCILLATOR;
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else if (oldType == SynthEngine::GridCell::INPUT_OSCILLATOR) newType = SynthEngine::GridCell::NOISE;
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else if (oldType == SynthEngine::GridCell::NOISE) newType = SynthEngine::GridCell::FORK;
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else if (oldType == SynthEngine::GridCell::FORK) newType = SynthEngine::GridCell::WIRE;
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else if (oldType == SynthEngine::GridCell::WIRE) newType = SynthEngine::GridCell::OPERATOR;
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else if (oldType == SynthEngine::GridCell::OPERATOR) newType = SynthEngine::GridCell::DELAY;
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else if (oldType == SynthEngine::GridCell::DELAY) newType = SynthEngine::GridCell::EMPTY;
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} else if (e.button.button == SDL_BUTTON_RIGHT) {
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c.rotation = (c.rotation + 1) % 4;
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} else if (e.button.button == SDL_BUTTON_MIDDLE) {
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newType = SynthEngine::GridCell::EMPTY;
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c.param = 0.5f;
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c.rotation = 0;
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}
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if (newType != oldType) {
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// If old type was DELAY, free its buffer
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if (oldType == SynthEngine::GridCell::DELAY && c.buffer) {
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delete[] c.buffer;
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c.buffer = nullptr;
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c.buffer_size = 0;
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}
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c.type = newType;
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// If new type is DELAY, allocate its buffer
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if (newType == SynthEngine::GridCell::DELAY) {
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c.buffer_size = 2 * SAMPLE_RATE; // Max 2 seconds delay
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c.buffer = new float[c.buffer_size](); // Allocate and zero-initialize
|
||||
c.write_idx = 0; // Reset write index
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// Synth Panel Click
|
||||
int synthX = mx - GRID_PANEL_WIDTH;
|
||||
// Check Toggle Click
|
||||
int toggleX = 580;
|
||||
int toggleY = 450;
|
||||
int toggleSize = 30;
|
||||
|
||||
if (synthX >= toggleX - toggleSize/2 && synthX <= toggleX + toggleSize/2 &&
|
||||
my >= toggleY - toggleSize/2 && my <= toggleY + toggleSize/2) {
|
||||
|
||||
auto_melody_enabled = !auto_melody_enabled;
|
||||
engine.setGate(false); // Silence synth on mode change
|
||||
current_key_scancode = 0;
|
||||
if (auto_melody_enabled) {
|
||||
auto_melody_next_event_time = SDL_GetTicks(); // Start immediately
|
||||
}
|
||||
}
|
||||
}
|
||||
} else if (e.type == SDL_MOUSEWHEEL) {
|
||||
int mx, my;
|
||||
SDL_GetMouseState(&mx, &my);
|
||||
|
||||
if (mx < GRID_PANEL_WIDTH) {
|
||||
// Grid Scroll
|
||||
int gx = mx / 80;
|
||||
int gy = my / 80;
|
||||
if (gx >= 0 && gx < 5 && gy >= 0 && gy < 8) {
|
||||
std::lock_guard<std::mutex> lock(engine.gridMutex);
|
||||
SynthEngine::GridCell& c = engine.grid[gx][gy];
|
||||
if (e.wheel.y > 0) c.param += 0.05f;
|
||||
else c.param -= 0.05f;
|
||||
if (c.param > 1.0f) c.param = 1.0f;
|
||||
if (c.param < 0.0f) c.param = 0.0f;
|
||||
}
|
||||
} else {
|
||||
// Synth Scroll
|
||||
int synthX = mx - GRID_PANEL_WIDTH;
|
||||
|
||||
if (synthX < SYNTH_PANEL_WIDTH / 2) { // Left knob (Octave)
|
||||
if (e.wheel.y > 0) current_octave++;
|
||||
else if (e.wheel.y < 0) current_octave--;
|
||||
|
||||
@ -303,40 +552,15 @@ int main(int argc, char* argv[]) {
|
||||
if (knob_vol_val < 0.0f) knob_vol_val = 0.0f;
|
||||
engine.setVolume(knob_vol_val);
|
||||
}
|
||||
} else if (e.type == SDL_MOUSEBUTTONDOWN) {
|
||||
int mouseX, mouseY;
|
||||
SDL_GetMouseState(&mouseX, &mouseY);
|
||||
|
||||
// Check Toggle Click
|
||||
int toggleX = 580;
|
||||
int toggleY = 450;
|
||||
int toggleSize = 30;
|
||||
|
||||
if (mouseX >= toggleX - toggleSize/2 && mouseX <= toggleX + toggleSize/2 &&
|
||||
mouseY >= toggleY - toggleSize/2 && mouseY <= toggleY + toggleSize/2) {
|
||||
|
||||
auto_melody_enabled = !auto_melody_enabled;
|
||||
engine.setGate(false); // Silence synth on mode change
|
||||
current_key_scancode = 0;
|
||||
if (auto_melody_enabled) {
|
||||
auto_melody_next_event_time = SDL_GetTicks(); // Start immediately
|
||||
}
|
||||
} else if (e.button.button == SDL_BUTTON_LEFT) {
|
||||
// Check Left Knob (Octave) or Waveform Icon
|
||||
// Knob: 100, 450, r=40. Waveform: 75, 500, 50x20
|
||||
bool clickedKnob = (pow(mouseX - 100, 2) + pow(mouseY - 450, 2)) <= pow(40, 2);
|
||||
bool clickedWave = (mouseX >= 75 && mouseX <= 125 && mouseY >= 500 && mouseY <= 520);
|
||||
if (clickedKnob || clickedWave) {
|
||||
// Left knob click emulates encoder switch: cycle waveform
|
||||
current_waveform = (SynthEngine::Waveform)(((int)current_waveform + 1) % 3);
|
||||
engine.setWaveform(current_waveform);
|
||||
}
|
||||
}
|
||||
} else if (e.type == SDL_MOUSEMOTION) {
|
||||
if (e.motion.state & SDL_BUTTON_LMASK) {
|
||||
int mouseX = e.motion.x;
|
||||
int mouseY = e.motion.y;
|
||||
|
||||
if (mouseX >= GRID_PANEL_WIDTH) {
|
||||
int synthX = mouseX - GRID_PANEL_WIDTH;
|
||||
|
||||
// Handle Sliders
|
||||
// ADSR: x=200, 250, 300, 350. y=380, h=150
|
||||
// Filters: x=450, 500.
|
||||
@ -345,7 +569,7 @@ int main(int argc, char* argv[]) {
|
||||
int sliderW = 30;
|
||||
|
||||
auto checkSlider = [&](int idx, int sx, float* val) {
|
||||
if (mouseX >= sx && mouseX <= sx + sliderW && mouseY >= sliderY - 20 && mouseY <= sliderY + sliderH + 20) {
|
||||
if (synthX >= sx && synthX <= sx + sliderW && mouseY >= sliderY - 20 && mouseY <= sliderY + sliderH + 20) {
|
||||
*val = 1.0f - (float)(mouseY - sliderY) / (float)sliderH;
|
||||
if (*val < 0.0f) *val = 0.0f;
|
||||
if (*val > 1.0f) *val = 1.0f;
|
||||
@ -368,6 +592,7 @@ int main(int argc, char* argv[]) {
|
||||
engine.setFilter(lpFreq, hpFreq);
|
||||
}
|
||||
}
|
||||
}
|
||||
} else if (e.type == SDL_KEYDOWN) {
|
||||
if (e.key.repeat == 0) { // Ignore key repeats
|
||||
if (e.key.keysym.scancode == SDL_SCANCODE_M) {
|
||||
@ -397,10 +622,8 @@ int main(int argc, char* argv[]) {
|
||||
|
||||
// Update window title with current values
|
||||
char title[256];
|
||||
snprintf(title, sizeof(title), "NoiceSynth | Freq: %.1f Hz | Vol: %.0f%% | Wave: %s | Oct: %d | Auto(M): %s",
|
||||
engine.getFrequency(),
|
||||
snprintf(title, sizeof(title), "NoiceSynth | Vol: %.0f%% | Oct: %d | Auto(M): %s",
|
||||
knob_vol_val * 100.0f,
|
||||
waveform_names[(int)current_waveform],
|
||||
current_octave,
|
||||
auto_melody_enabled ? "ON" : "OFF");
|
||||
SDL_SetWindowTitle(window, title);
|
||||
@ -409,8 +632,11 @@ int main(int argc, char* argv[]) {
|
||||
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
|
||||
SDL_RenderClear(renderer);
|
||||
|
||||
// --- Draw Synth Panel (Right) ---
|
||||
SDL_Rect synthViewport = {GRID_PANEL_WIDTH, 0, SYNTH_PANEL_WIDTH, WINDOW_HEIGHT};
|
||||
SDL_RenderSetViewport(renderer, &synthViewport);
|
||||
|
||||
// --- Draw Waveform (Oscilloscope) ---
|
||||
// Draw in the top half of the window
|
||||
SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255); // Green
|
||||
|
||||
// Determine read position (snapshot atomic write index)
|
||||
@ -438,7 +664,7 @@ int main(int argc, char* argv[]) {
|
||||
int prev_x = -1;
|
||||
int prev_y = -1;
|
||||
|
||||
for (int x = 0; x < WINDOW_WIDTH; ++x) {
|
||||
for (int x = 0; x < SYNTH_PANEL_WIDTH; ++x) {
|
||||
int16_t sample = vis_buffer[read_idx];
|
||||
read_idx = (read_idx + 1) % VIS_BUFFER_SIZE;
|
||||
|
||||
@ -458,7 +684,6 @@ int main(int argc, char* argv[]) {
|
||||
// Knobs moved to edges
|
||||
float normalized_octave = (float)current_octave / 8.0f; // Max octave 8
|
||||
drawKnob(renderer, 100, 450, 40, normalized_octave);
|
||||
drawWaveformIcon(renderer, 100 - 25, 450 + 50, 50, 20, current_waveform);
|
||||
|
||||
drawKnob(renderer, 700, 450, 40, knob_vol_val);
|
||||
|
||||
@ -472,6 +697,23 @@ int main(int argc, char* argv[]) {
|
||||
drawSlider(renderer, 450, 380, 30, 150, filter_vals[0], "LP");
|
||||
drawSlider(renderer, 500, 380, 30, 150, filter_vals[1], "HP");
|
||||
|
||||
// --- Draw Grid Panel (Left) ---
|
||||
SDL_Rect gridViewport = {0, 0, GRID_PANEL_WIDTH, WINDOW_HEIGHT};
|
||||
SDL_RenderSetViewport(renderer, &gridViewport);
|
||||
|
||||
// Draw separator line
|
||||
SDL_SetRenderDrawColor(renderer, 50, 50, 50, 255);
|
||||
SDL_RenderDrawLine(renderer, GRID_PANEL_WIDTH - 1, 0, GRID_PANEL_WIDTH - 1, WINDOW_HEIGHT);
|
||||
|
||||
{
|
||||
// Lock only for reading state to draw
|
||||
std::lock_guard<std::mutex> lock(engine.gridMutex);
|
||||
for(int x=0; x<5; ++x) {
|
||||
for(int y=0; y<8; ++y) {
|
||||
drawGridCell(renderer, x*80, y*80, 80, engine.grid[x][y]);
|
||||
}
|
||||
}
|
||||
}
|
||||
SDL_RenderPresent(renderer);
|
||||
}
|
||||
|
||||
|
||||
235
synth_engine.cpp
235
synth_engine.cpp
@ -32,12 +32,27 @@ SynthEngine::SynthEngine(uint32_t sampleRate)
|
||||
_sustainLevel(1.0f),
|
||||
_releaseDec(0.0f),
|
||||
_lpAlpha(1.0f), _hpAlpha(0.0f),
|
||||
_lpVal(0.0f), _hpVal(0.0f)
|
||||
_lpVal(0.0f), _hpVal(0.0f),
|
||||
grid{}
|
||||
{
|
||||
fill_sine_table();
|
||||
// Initialize with a default frequency
|
||||
setFrequency(440.0f);
|
||||
setADSR(0.05f, 0.1f, 0.7f, 0.2f); // Default envelope
|
||||
|
||||
// Initialize SINK
|
||||
grid[2][3].type = GridCell::SINK;
|
||||
}
|
||||
|
||||
SynthEngine::~SynthEngine() {
|
||||
for (int x = 0; x < 5; ++x) {
|
||||
for (int y = 0; y < 8; ++y) {
|
||||
if (grid[x][y].buffer) {
|
||||
delete[] grid[x][y].buffer;
|
||||
grid[x][y].buffer = nullptr;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void SynthEngine::setFrequency(float freq) {
|
||||
@ -92,26 +107,212 @@ float SynthEngine::getFrequency() const {
|
||||
return (float)((double)_increment * (double)_sampleRate / 4294967296.0);
|
||||
}
|
||||
|
||||
void SynthEngine::process(int16_t* buffer, uint32_t numFrames) {
|
||||
for (uint32_t i = 0; i < numFrames; ++i) {
|
||||
_phase += _increment;
|
||||
float SynthEngine::processGridStep() {
|
||||
// Double buffer for values to handle feedback loops gracefully (1-sample delay)
|
||||
float next_values[5][8];
|
||||
|
||||
int16_t sample = 0;
|
||||
// Helper to get input from a neighbor
|
||||
auto getInput = [&](int tx, int ty, int from_x, int from_y) -> float {
|
||||
if (from_x < 0 || from_x >= 5 || from_y < 0 || from_y >= 8) return 0.0f;
|
||||
GridCell& n = grid[from_x][from_y];
|
||||
|
||||
// Oscillator Generation
|
||||
switch (_waveform) {
|
||||
case SAWTOOTH:
|
||||
sample = static_cast<int16_t>(_phase >> 16);
|
||||
break;
|
||||
case SQUARE:
|
||||
sample = (_phase < 0x80000000) ? 32767 : -32768;
|
||||
break;
|
||||
case SINE:
|
||||
sample = sine_table[(_phase >> 24) & 0xFF];
|
||||
break;
|
||||
// Check if neighbor outputs to (tx, ty)
|
||||
bool connects = false;
|
||||
if (n.type == GridCell::WIRE || n.type == GridCell::FIXED_OSCILLATOR || n.type == GridCell::INPUT_OSCILLATOR || n.type == GridCell::OPERATOR || n.type == GridCell::NOISE || n.type == GridCell::DELAY) {
|
||||
// Check rotation
|
||||
// 0:N (y-1), 1:E (x+1), 2:S (y+1), 3:W (x-1)
|
||||
if (n.rotation == 0 && from_y - 1 == ty && from_x == tx) connects = true;
|
||||
if (n.rotation == 1 && from_x + 1 == tx && from_y == ty) connects = true;
|
||||
if (n.rotation == 2 && from_y + 1 == ty && from_x == tx) connects = true;
|
||||
if (n.rotation == 3 && from_x - 1 == tx && from_y == ty) connects = true;
|
||||
} else if (n.type == GridCell::FORK) {
|
||||
// Fork outputs to Left (rot+3) and Right (rot+1) relative to its rotation
|
||||
// n.rotation is "Forward"
|
||||
int dx = tx - from_x;
|
||||
int dy = ty - from_y;
|
||||
int dir = -1;
|
||||
if (dx == 0 && dy == -1) dir = 0; // N
|
||||
if (dx == 1 && dy == 0) dir = 1; // E
|
||||
if (dx == 0 && dy == 1) dir = 2; // S
|
||||
if (dx == -1 && dy == 0) dir = 3; // W
|
||||
|
||||
int leftOut = (n.rotation + 3) % 4;
|
||||
int rightOut = (n.rotation + 1) % 4;
|
||||
|
||||
if (dir == leftOut) return n.value * (1.0f - n.param) * 2.0f;
|
||||
if (dir == rightOut) return n.value * n.param * 2.0f;
|
||||
}
|
||||
|
||||
float sampleF = static_cast<float>(sample);
|
||||
return connects ? n.value : 0.0f;
|
||||
};
|
||||
|
||||
for (int x = 0; x < 5; ++x) {
|
||||
for (int y = 0; y < 8; ++y) {
|
||||
GridCell& c = grid[x][y];
|
||||
float val = 0.0f;
|
||||
|
||||
if (c.type == GridCell::EMPTY) {
|
||||
val = 0.0f;
|
||||
} else if (c.type == GridCell::FIXED_OSCILLATOR) {
|
||||
// Gather inputs for modulation
|
||||
float mod = 0.0f;
|
||||
mod += getInput(x, y, x, y-1);
|
||||
mod += getInput(x, y, x+1, y);
|
||||
mod += getInput(x, y, x, y+1);
|
||||
mod += getInput(x, y, x-1, y);
|
||||
|
||||
// Freq 10 to 1000 Hz
|
||||
float freq = 10.0f + c.param * 990.0f + (mod * 500.0f); // FM
|
||||
if (freq < 1.0f) freq = 1.0f;
|
||||
|
||||
float inc = freq * (float)SINE_TABLE_SIZE / (float)_sampleRate;
|
||||
c.phase += inc;
|
||||
if (c.phase >= SINE_TABLE_SIZE) c.phase -= SINE_TABLE_SIZE;
|
||||
val = (float)sine_table[(int)c.phase] / 32768.0f;
|
||||
} else if (c.type == GridCell::INPUT_OSCILLATOR) {
|
||||
float mod = 0.0f;
|
||||
mod += getInput(x, y, x, y-1);
|
||||
mod += getInput(x, y, x+1, y);
|
||||
mod += getInput(x, y, x, y+1);
|
||||
mod += getInput(x, y, x-1, y);
|
||||
|
||||
// Freq based on current note + octave param (1-5)
|
||||
float baseFreq = getFrequency();
|
||||
int octave = 1 + (int)(c.param * 4.99f); // Map 0.0-1.0 to 1-5
|
||||
float freq = baseFreq * (float)(1 << (octave - 1)); // 2^(octave-1)
|
||||
float inc = freq * (float)SINE_TABLE_SIZE / (float)_sampleRate;
|
||||
c.phase += inc;
|
||||
if (c.phase >= SINE_TABLE_SIZE) c.phase -= SINE_TABLE_SIZE;
|
||||
val = (float)sine_table[(int)c.phase] / 32768.0f;
|
||||
} else if (c.type == GridCell::NOISE) {
|
||||
float white = (float)rand() / (float)RAND_MAX * 2.0f - 1.0f;
|
||||
int shade = (int)(c.param * 4.99f);
|
||||
switch(shade) {
|
||||
case 0: // Brown (Leaky integrator)
|
||||
c.phase = (c.phase + white * 0.1f) * 0.95f;
|
||||
val = c.phase * 3.0f; // Gain up
|
||||
break;
|
||||
case 1: // Pink (Approx: LPF)
|
||||
c.phase = 0.5f * c.phase + 0.5f * white;
|
||||
val = c.phase;
|
||||
break;
|
||||
case 2: // White
|
||||
val = white;
|
||||
break;
|
||||
case 3: // Yellow (HPF)
|
||||
val = white - c.phase;
|
||||
c.phase = white; // Store last sample
|
||||
break;
|
||||
case 4: // Green (BPF approx)
|
||||
c.phase = (c.phase + white) * 0.5f; // LPF
|
||||
val = white - c.phase; // HPF result
|
||||
break;
|
||||
}
|
||||
} else if (c.type == GridCell::FORK) {
|
||||
// Sum inputs from "Back" (Input direction)
|
||||
// Rotation is "Forward". Input is "Back" (rot+2)
|
||||
int inDir = (c.rotation + 2) % 4;
|
||||
int dx=0, dy=0;
|
||||
if(inDir==0) dy=-1; else if(inDir==1) dx=1; else if(inDir==2) dy=1; else dx=-1;
|
||||
// We only read from the specific input neighbor
|
||||
val = getInput(x, y, x+dx, y+dy);
|
||||
} else if (c.type == GridCell::WIRE) {
|
||||
// Sum inputs from all neighbors that point to me
|
||||
float sum = 0.0f;
|
||||
sum += getInput(x, y, x, y-1); // N
|
||||
sum += getInput(x, y, x+1, y); // E
|
||||
sum += getInput(x, y, x, y+1); // S
|
||||
sum += getInput(x, y, x-1, y); // W
|
||||
val = sum * c.param; // Fading
|
||||
} else if (c.type == GridCell::DELAY) {
|
||||
// Input is from the "Back" (rot+2)
|
||||
int inDir = (c.rotation + 2) % 4;
|
||||
int dx=0, dy=0;
|
||||
if(inDir==0) dy=-1; else if(inDir==1) dx=1; else if(inDir==2) dy=1; else dx=-1;
|
||||
float input_val = getInput(x, y, x+dx, y+dy);
|
||||
|
||||
if (c.buffer && c.buffer_size > 0) {
|
||||
// Write current input to buffer
|
||||
c.buffer[c.write_idx] = input_val;
|
||||
|
||||
// Calculate read index based on parameter. Max delay is buffer_size.
|
||||
uint32_t delay_samples = c.param * (c.buffer_size - 1);
|
||||
|
||||
// Using modulo for wraparound. Need to handle negative result from subtraction.
|
||||
int read_idx = (int)c.write_idx - (int)delay_samples;
|
||||
if (read_idx < 0) {
|
||||
read_idx += c.buffer_size;
|
||||
}
|
||||
|
||||
// Read delayed value for output
|
||||
val = c.buffer[read_idx];
|
||||
|
||||
// Increment write index
|
||||
c.write_idx = (c.write_idx + 1) % c.buffer_size;
|
||||
} else {
|
||||
val = 0.0f; // No buffer, no output
|
||||
}
|
||||
} else if (c.type == GridCell::OPERATOR || c.type == GridCell::SINK) {
|
||||
// Gather inputs
|
||||
float inputs[4];
|
||||
int count = 0;
|
||||
float iN = getInput(x, y, x, y-1); if(iN!=0) inputs[count++] = iN;
|
||||
float iE = getInput(x, y, x+1, y); if(iE!=0) inputs[count++] = iE;
|
||||
float iS = getInput(x, y, x, y+1); if(iS!=0) inputs[count++] = iS;
|
||||
float iW = getInput(x, y, x-1, y); if(iW!=0) inputs[count++] = iW;
|
||||
|
||||
if (c.type == GridCell::SINK) {
|
||||
// Sink just sums everything
|
||||
val = iN + iE + iS + iW;
|
||||
} else {
|
||||
// Operator
|
||||
int opType = (int)(c.param * 5.99f);
|
||||
if (count == 0) val = 0.0f;
|
||||
else {
|
||||
val = inputs[0];
|
||||
for (int i=1; i<count; ++i) {
|
||||
switch(opType) {
|
||||
case 0: val += inputs[i]; break; // ADD
|
||||
case 1: val *= inputs[i]; break; // MUL
|
||||
case 2: val -= inputs[i]; break; // SUB
|
||||
case 3: if(inputs[i]!=0) val /= inputs[i]; break; // DIV
|
||||
case 4: if(inputs[i]<val) val = inputs[i]; break; // MIN
|
||||
case 5: if(inputs[i]>val) val = inputs[i]; break; // MAX
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
next_values[x][y] = val;
|
||||
}
|
||||
}
|
||||
|
||||
// Update state
|
||||
for(int x=0; x<5; ++x) {
|
||||
for(int y=0; y<8; ++y) {
|
||||
grid[x][y].value = next_values[x][y];
|
||||
}
|
||||
}
|
||||
|
||||
return grid[2][3].value;
|
||||
}
|
||||
|
||||
void SynthEngine::process(int16_t* buffer, uint32_t numFrames) {
|
||||
// Lock grid mutex to prevent UI from changing grid structure mid-process
|
||||
std::lock_guard<std::mutex> lock(gridMutex);
|
||||
|
||||
for (uint32_t i = 0; i < numFrames; ++i) {
|
||||
// The grid is now the primary sound source.
|
||||
// The processGridStep() returns a float in the approx range of -1.0 to 1.0.
|
||||
float sampleF = processGridStep();
|
||||
|
||||
// Soft clip grid sample to avoid harsh distortion before filtering.
|
||||
if (sampleF > 1.0f) sampleF = 1.0f;
|
||||
if (sampleF < -1.0f) sampleF = -1.0f;
|
||||
|
||||
// The filters were designed for a signal in the int16 range.
|
||||
// We scale the grid's float output to match this expected range.
|
||||
sampleF *= 32767.0f;
|
||||
|
||||
// Apply Filters (One-pole)
|
||||
// Low Pass
|
||||
|
||||
@ -2,6 +2,7 @@
|
||||
#define SYNTH_ENGINE_H
|
||||
|
||||
#include <stdint.h>
|
||||
#include <mutex>
|
||||
|
||||
/**
|
||||
* @class SynthEngine
|
||||
@ -27,6 +28,7 @@ public:
|
||||
* @brief Constructs the synthesizer engine.
|
||||
* @param sampleRate The audio sample rate in Hz (e.g., 44100).
|
||||
*/
|
||||
~SynthEngine();
|
||||
SynthEngine(uint32_t sampleRate);
|
||||
|
||||
/**
|
||||
@ -82,6 +84,27 @@ public:
|
||||
*/
|
||||
void setFilter(float lpCutoff, float hpCutoff);
|
||||
|
||||
// --- Grid Synth ---
|
||||
struct GridCell {
|
||||
enum Type { EMPTY, FIXED_OSCILLATOR, INPUT_OSCILLATOR, NOISE, FORK, WIRE, OPERATOR, DELAY, SINK };
|
||||
enum Op { OP_ADD, OP_MUL, OP_SUB, OP_DIV, OP_MIN, OP_MAX };
|
||||
|
||||
Type type = EMPTY;
|
||||
float param = 0.5f; // 0.0 to 1.0
|
||||
int rotation = 0; // 0:N, 1:E, 2:S, 3:W (Output direction)
|
||||
float value = 0.0f; // Current output sample
|
||||
float phase = 0.0f; // For Oscillator, Noise state
|
||||
float* buffer = nullptr; // For Delay
|
||||
uint32_t buffer_size = 0; // For Delay
|
||||
uint32_t write_idx = 0; // For Delay
|
||||
};
|
||||
|
||||
GridCell grid[5][8];
|
||||
std::mutex gridMutex;
|
||||
|
||||
// Helper to process one sample step of the grid
|
||||
float processGridStep();
|
||||
|
||||
private:
|
||||
uint32_t _sampleRate;
|
||||
uint32_t _phase; // Phase accumulator for the oscillator.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user