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// Minimal audio/visual synchronization test tool
// Plays simple drum beat with synchronized screen flashes
#include "audio/audio.h"
#include "audio/audio_engine.h"
#include "audio/synth.h"
#include "generated/assets.h" // Note: uses main demo asset bundle
#include "gpu/demo_effects.h"
#include "gpu/gpu.h"
#include "platform.h"
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
// External declarations from generated files
extern float GetDemoDuration();
extern void LoadTimeline(MainSequence& main_seq, WGPUDevice device, WGPUQueue queue, WGPUTextureFormat format);
#if !defined(STRIP_ALL)
static void print_usage(const char* prog_name) {
printf("Usage: %s [OPTIONS]\n", prog_name);
printf("\nMinimal audio/visual synchronization test tool.\n");
printf("Plays a simple drum beat with synchronized screen flashes.\n");
printf("\nOptions:\n");
printf(" --help Show this help message and exit\n");
printf(" --fullscreen Run in fullscreen mode\n");
printf(" --resolution WxH Set window resolution (e.g., 1024x768)\n");
printf(" --tempo Enable tempo variation test mode\n");
printf(" (alternates between acceleration and deceleration)\n");
printf(" --log-peaks FILE Log audio peaks to FILE for gnuplot visualization\n");
printf("\nExamples:\n");
printf(" %s --fullscreen\n", prog_name);
printf(" %s --resolution 1024x768 --tempo\n", prog_name);
printf(" %s --log-peaks peaks.txt\n", prog_name);
printf("\nControls:\n");
printf(" ESC Exit the demo\n");
printf(" F Toggle fullscreen\n");
}
#endif
int main(int argc, char** argv) {
// Parse command-line
PlatformState platform_state;
bool fullscreen_enabled = false;
bool tempo_test_enabled = false;
int width = 1280;
int height = 720;
const char* log_peaks_file = nullptr;
#if !defined(STRIP_ALL)
for (int i = 1; i < argc; ++i) {
if (strcmp(argv[i], "--help") == 0) {
print_usage(argv[0]);
return 0;
} else if (strcmp(argv[i], "--fullscreen") == 0) {
fullscreen_enabled = true;
} else if (strcmp(argv[i], "--tempo") == 0) {
tempo_test_enabled = true;
} else if (strcmp(argv[i], "--resolution") == 0 && i + 1 < argc) {
const char* res_str = argv[++i];
int w, h;
if (sscanf(res_str, "%dx%d", &w, &h) == 2) {
width = w;
height = h;
}
} else if (strcmp(argv[i], "--log-peaks") == 0 && i + 1 < argc) {
log_peaks_file = argv[++i];
}
}
#else
(void)argc;
(void)argv;
fullscreen_enabled = true;
#endif
// Initialize platform, GPU, audio
platform_state = platform_init(fullscreen_enabled, width, height);
gpu_init(&platform_state);
audio_init();
static AudioEngine g_audio_engine;
g_audio_engine.init();
// Music time tracking with optional tempo variation
static float g_music_time = 0.0f;
static double g_last_physical_time = 0.0;
static float g_tempo_scale = 1.0f;
auto fill_audio_buffer = [&](double t) {
const float dt = (float)(t - g_last_physical_time);
g_last_physical_time = t;
// Calculate tempo scale if --tempo flag enabled
if (tempo_test_enabled) {
// Each bar = 2 seconds at 120 BPM (4 beats)
const float bar_duration = 2.0f;
const int bar_number = (int)(t / bar_duration);
const float bar_progress = fmodf((float)t, bar_duration) / bar_duration; // 0.0-1.0 within bar
if (bar_number % 2 == 0) {
// Even bars: Ramp from 1.0x → 1.5x
g_tempo_scale = 1.0f + (0.5f * bar_progress);
} else {
// Odd bars: Ramp from 1.0x → 0.66x
g_tempo_scale = 1.0f - (0.34f * bar_progress);
}
} else {
g_tempo_scale = 1.0f; // No tempo variation
}
g_music_time += dt * g_tempo_scale;
g_audio_engine.update(g_music_time);
audio_render_ahead(g_music_time, dt * g_tempo_scale);
};
// Pre-fill audio buffer
g_audio_engine.update(g_music_time);
audio_render_ahead(g_music_time, 1.0f / 60.0f);
audio_start();
int last_width = platform_state.width;
int last_height = platform_state.height;
const float demo_duration = GetDemoDuration();
#if !defined(STRIP_ALL)
// Open peak log file if requested
FILE* peak_log = nullptr;
if (log_peaks_file) {
peak_log = fopen(log_peaks_file, "w");
if (peak_log) {
fprintf(peak_log, "# Audio peak log from test_demo\n");
fprintf(peak_log, "# To plot with gnuplot:\n");
fprintf(peak_log, "# gnuplot -p -e \"set xlabel 'Time (s)'; set ylabel 'Peak'; plot '%s' using 1:3 with lines title 'Raw Peak'\"\n", log_peaks_file);
fprintf(peak_log, "# Columns: beat_number clock_time raw_peak\n");
fprintf(peak_log, "#\n");
} else {
fprintf(stderr, "Warning: Could not open log file '%s'\n", log_peaks_file);
}
}
int last_beat_logged = -1;
#endif
// Main loop
while (!platform_should_close(&platform_state)) {
platform_poll(&platform_state);
// Handle resize
if (platform_state.width != last_width ||
platform_state.height != last_height) {
last_width = platform_state.width;
last_height = platform_state.height;
gpu_resize(last_width, last_height);
}
const double current_time = platform_state.time;
// Auto-exit at end
if (demo_duration > 0.0f && current_time >= demo_duration) {
#if !defined(STRIP_ALL)
printf("test_demo finished at %.2f seconds.\n", current_time);
#endif
break;
}
fill_audio_buffer(current_time);
// Audio/visual sync parameters
const float aspect_ratio = platform_state.aspect_ratio;
const float raw_peak = synth_get_output_peak();
const float visual_peak = fminf(raw_peak * 8.0f, 1.0f);
// Beat calculation (hardcoded BPM=120)
const float beat_time = (float)current_time * 120.0f / 60.0f;
const int beat_number = (int)beat_time;
const float beat = fmodf(beat_time, 1.0f);
#if !defined(STRIP_ALL)
// Log peak at each beat boundary
if (peak_log && beat_number != last_beat_logged) {
fprintf(peak_log, "%d %.6f %.6f\n", beat_number, current_time, raw_peak);
last_beat_logged = beat_number;
}
// Debug output every 0.5 seconds
static float last_print_time = -1.0f;
if (current_time - last_print_time >= 0.5f) {
if (tempo_test_enabled) {
printf("[T=%.2f, MusicT=%.2f, Beat=%d, Frac=%.2f, Peak=%.2f, Tempo=%.2fx]\n",
(float)current_time, g_music_time, beat_number, beat, visual_peak, g_tempo_scale);
} else {
printf("[T=%.2f, Beat=%d, Frac=%.2f, Peak=%.2f]\n",
(float)current_time, beat_number, beat, visual_peak);
}
last_print_time = (float)current_time;
}
#endif
gpu_draw(visual_peak, aspect_ratio, (float)current_time, beat);
audio_update();
}
// Shutdown
#if !defined(STRIP_ALL)
if (peak_log) {
fclose(peak_log);
printf("Peak log written to '%s'\n", log_peaks_file);
}
#endif
audio_shutdown();
gpu_shutdown();
platform_shutdown(&platform_state);
return 0;
}
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