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// This file is part of the 64k demo project.
// It serves as the application entry point.
// Orchestrates platform initialization, main loop, and subsystem coordination.
#include "assets.h" // Include generated asset header
#include "audio/audio.h"
#include "audio/synth.h"
#include "gpu/gpu.h"
#include "platform.h"
#include "util/math.h"
#include <GLFW/glfw3.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#define DEMO_BPM 120.0f
#define SECONDS_PER_BEAT (60.0f / DEMO_BPM)
#define SPEC_FRAMES 16
static float g_spec_buffer_a[SPEC_FRAMES * DCT_SIZE];
static float g_spec_buffer_b[SPEC_FRAMES * DCT_SIZE];
void generate_tone(float *buffer, float freq) {
memset(buffer, 0, SPEC_FRAMES * DCT_SIZE * sizeof(float));
for (int frame = 0; frame < SPEC_FRAMES; ++frame) {
float *spec_frame = buffer + frame * DCT_SIZE;
float amplitude = powf(1.0f - (float)frame / SPEC_FRAMES, 2.0f);
int bin = (int)(freq / (32000.0f / 2.0f) * DCT_SIZE);
if (bin > 0 && bin < DCT_SIZE) {
spec_frame[bin] = amplitude;
}
}
}
int main(int argc, char **argv) {
bool fullscreen_enabled = false;
#ifndef STRIP_ALL
for (int i = 1; i < argc; ++i) {
if (strcmp(argv[i], "--fullscreen") == 0) {
fullscreen_enabled = true;
break;
}
}
#else
(void)argc;
(void)argv;
fullscreen_enabled = true;
#endif
platform_init_window(fullscreen_enabled);
gpu_init(platform_get_window());
audio_init();
generate_tone(g_spec_buffer_a, 440.0f); // A4
generate_tone(g_spec_buffer_b, 0.0f); // A5
const Spectrogram spec = {g_spec_buffer_a, g_spec_buffer_b, SPEC_FRAMES};
int tone_id = synth_register_spectrogram(&spec);
// Dummy call to ensure asset system is linked
size_t dummy_size;
const uint8_t *dummy_asset = GetAsset(AssetId::ASSET_NULL_ASSET, &dummy_size);
(void)dummy_asset;
(void)dummy_size;
double last_beat_time = 0.0;
int beat_count = 0;
while (!platform_should_close()) {
platform_poll();
double current_time = platform_get_time();
if (current_time - last_beat_time > SECONDS_PER_BEAT) {
const float pan = (beat_count & 1) ? -.8 : .8;
synth_trigger_voice(tone_id, 0.8f, pan);
last_beat_time = current_time;
beat_count++;
if (beat_count % 4 == 0) {
// Time to update the sound!
float *back_buffer = synth_begin_update(tone_id);
if (back_buffer) {
generate_tone(back_buffer,
(beat_count % 8) == 4 ? 220.0f : 480.f); // A3
synth_commit_update(tone_id);
}
}
}
int width, height;
glfwGetFramebufferSize(platform_get_window(), &width, &height);
float aspect_ratio = (float)width / (float)height;
float visual_peak = fminf(synth_get_output_peak() * 80.0f, 1.0f);
gpu_draw(visual_peak, aspect_ratio);
audio_update();
}
audio_shutdown();
gpu_shutdown();
platform_shutdown();
return 0;
}
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