rogged/src/audio.c

#include "audio.h"
#include "raylib.h"
#include <math.h>
#include <stddef.h>

#ifndef M_PI
#define M_PI 3.14159265358979323846  // xd
#endif

#define SAMPLE_RATE 44100
#define DURATION 0.1

// Generate a simple sine wave tone
static void play_tone(float frequency, float duration, float volume) {
  int sample_count = (int)(SAMPLE_RATE * duration);

  if (sample_count > SAMPLE_RATE)
    sample_count = SAMPLE_RATE;
  if (sample_count <= 0)
    return;

  // Allocate samples dynamically to avoid shared static buffer corruption
  float *samples = (float *)MemAlloc(sample_count * sizeof(float));
  if (samples == NULL)
    return;

  // Generate sine wave
  for (int i = 0; i < sample_count; i++) {
    float t = (float)i / SAMPLE_RATE;
    samples[i] = sinf(2.0f * M_PI * frequency * t) * volume;

    // Apply simple envelope (fade in/out)
    float envelope = 1.0f;
    int fade_samples = SAMPLE_RATE / 20;  // 50ms fade
    if (i < fade_samples) {
      envelope = (float)i / fade_samples;
    } else if (i > sample_count - fade_samples) {
      envelope = (float)(sample_count - i) / fade_samples;
    }
    samples[i] *= envelope;
  }

  // Create wave from samples
  Wave wave = {.frameCount = (unsigned int)sample_count,
               .sampleRate = SAMPLE_RATE,
               .sampleSize = 32,
               .channels = 1,
               .data = samples};

  Sound sound = LoadSoundFromWave(wave);
  PlaySound(sound);
  UnloadSound(sound);

  // Free the dynamically allocated buffer
  MemFree(samples);
}

void audio_init(void) {
  // Initialize audio device
  InitAudioDevice();
}

void audio_close(void) {
  // Close audio device
  CloseAudioDevice();
}

void audio_play_move(void) {
  // Low blip for movement
  play_tone(200.0f, 0.05f, 0.3f);
}

void audio_play_attack(void) {
  // Mid-range hit sound
  play_tone(400.0f, 0.1f, 0.5f);
}

void audio_play_item_pickup(void) {
  // High-pitched pickup sound
  play_tone(800.0f, 0.15f, 0.4f);
}

void audio_play_enemy_death(void) {
  // Descending death sound
  play_tone(300.0f, 0.1f, 0.5f);
  play_tone(150.0f, 0.15f, 0.4f);
}

void audio_play_player_damage(void) {
  // Harsh damage sound
  play_tone(150.0f, 0.1f, 0.6f);
  play_tone(100.0f, 0.1f, 0.4f);
}

void audio_play_stairs(void) {
  // Ascending stairs sound
  play_tone(400.0f, 0.1f, 0.3f);
  play_tone(600.0f, 0.1f, 0.3f);
  play_tone(800.0f, 0.15f, 0.3f);
}