tarinai/js/audio.js

"use strict";
const audio = {
  enabled: false,
  ctx: null,
  samples: {},
  sampleLast: {},
  samplePaths: {
    hau: "assets/sounds/voice_001_hau.wav",
    flee: "assets/sounds/voice_002_flee.wav",
    poop: "assets/sounds/voice_003_po.wav",
    eat: "assets/sounds/voice_004_eat.wav",
    stress: "assets/sounds/voice_005_stress.wav",
    sleep: "assets/sounds/voice_006_sleep.wav",
    explosion: "assets/sounds/firecracker_explosion.mp3",
  },
  ensure() {
    const AudioClass = window.AudioContext || window.webkitAudioContext;
    if (!AudioClass) return null;
    if (!this.ctx) this.ctx = new AudioClass();
    if (this.ctx.state === "suspended") this.ctx.resume();
    this.initSamples();
    return this.ctx;
  },
  initSamples() {
    if (this._samplesReady) return;
    this._samplesReady = true;
    for (const [key, path] of Object.entries(this.samplePaths)) {
      const a = new Audio(path);
      a.preload = "auto";
      a.volume = 0.72;
      this.samples[key] = a;
    }
  },
  toggle() {
    this.enabled = !this.enabled;
    if (this.enabled) this.ensure();
    return this.enabled;
  },
  playSample(key, minGap = 0.16) {
    if (!this.enabled) return false;
    this.ensure();
    const base = this.samples[key];
    if (!base) return false;
    const t = performance.now() / 1000;
    if (t - (this.sampleLast[key] || 0) < minGap) return true;
    this.sampleLast[key] = t;
    const node = base.cloneNode(true);
    node.volume = base.volume;
    node.play().catch(() => {});
    return true;
  },
  tone(freq, dur = 0.08, type = "sine", gain = 0.035, slide = 0) {
    if (!this.enabled) return;
    const ctx = this.ensure();
    if (!ctx) return;
    const t0 = ctx.currentTime;
    const osc = ctx.createOscillator();
    const g = ctx.createGain();
    osc.type = type;
    osc.frequency.setValueAtTime(freq, t0);
    if (slide) osc.frequency.linearRampToValueAtTime(Math.max(40, freq + slide), t0 + dur);
    g.gain.setValueAtTime(0.0001, t0);
    g.gain.exponentialRampToValueAtTime(gain, t0 + 0.01);
    g.gain.exponentialRampToValueAtTime(0.0001, t0 + dur);
    osc.connect(g).connect(ctx.destination);
    osc.start(t0);
    osc.stop(t0 + dur + 0.02);
  },
  bubble(text) {
    const s = String(text || "");
    if (s.includes("\u3082\u3050")) return this.playSample("eat", 0.20);
    if (s.includes("\u3076\u308a")) return this.playSample("poop", 0.28);
    if (s.includes("\u306f\u3063")) return this.playSample("stress", 0.80);
    if (s.includes("Zzz")) return this.playSample("sleep", 1.25);
    if (s.includes("\u306f\u3041") || s.includes("\u306f\u3042")) return this.playSample("flee", 0.70);
    if (s.includes("\u306f\u3046") || s.includes("\u306f\u3045")) return this.playSample("hau", 0.45);
    return false;
  },
  eat() { if (!this.playSample("eat", 0.20)) this.tone(660 + Math.random() * 140, 0.055, "triangle", 0.026, 120); },
  poke() { this.tone(180, 0.09, "sawtooth", 0.022, -70); },
  birth() { this.tone(520, 0.08, "sine", 0.028, 100); setTimeout(() => this.tone(760, 0.10, "triangle", 0.024, 80), 70); },
  death() { this.tone(150, 0.22, "sine", 0.028, -70); },
  fight() { this.tone(110, 0.055, "square", 0.018, 70); setTimeout(() => this.tone(90, 0.045, "sawtooth", 0.014, -40), 35); },
  explode() { if (!this.playSample("explosion", 0.30)) { this.tone(90, 0.12, "sawtooth", 0.06, -30); setTimeout(() => this.tone(55, 0.20, "square", 0.04, -20), 40); } },
  phase() { this.tone(440, 0.06, "sine", 0.018, 60); },
};

window.TarinaiAudio = audio;