Crookfinger's voice: he babbles in a squeaky imp language in the rhythm of his hints, important messages and the mission briefings (can be switched off in the sound settings)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/voice.rs

@@ -0,0 +1,71 @@
+// Crookfinger's voice: he "speaks" in a squeaky made-up imp language - short synthesised
+// syllables in the rhythm of the text (the text itself is shown as usual).
+
+use crate::audio;
+use crate::game::VOICE_SYLLABLES;
+
+pub struct Voice {
+    queue: Vec<(f64, usize)>, // time, sound index
+    busy_until: f64,
+}
+
+// which messages Crookfinger says out loud
+pub fn speaks(key: &str) -> bool {
+    key.starts_with("hint.")
+        || key.starts_with("msg.wave_warn")
+        || matches!(
+            key,
+            "msg.payday_soon" | "msg.researched" | "msg.mission_start" | "msg.mission_won" | "msg.rune_chest" | "msg.trap_made" | "msg.revenant_rises" | "msg.altar_gift" | "msg.altar_blessing" | "msg.brawl" | "msg.alarm" | "msg.creature_freed" | "msg.spring_taken"
+        )
+}
+
+impl Voice {
+    pub fn new() -> Voice {
+        Voice { queue: Vec::new(), busy_until: 0.0 }
+    }
+
+    // babble a text: one syllable per vowel group, pauses at spaces and punctuation
+    pub fn say(&mut self, text: &str, now: f64, max_syllables: usize) {
+        if now < self.busy_until {
+            return;
+        }
+        let mut t = now + 0.05;
+        let mut n = 0;
+        let mut h: u32 = 2166136261;
+        let mut in_vowel = false;
+        for ch in text.chars() {
+            h = (h ^ ch as u32).wrapping_mul(16777619);
+            let vowel = "aeiouäöüyAEIOUÄÖÜY".contains(ch);
+            if vowel && !in_vowel {
+                let v = VOICE_SYLLABLES[(h >> 7) as usize % VOICE_SYLLABLES.len()];
+                self.queue.push((t, v.index()));
+                t += 0.085 + ((h >> 13) % 4) as f64 * 0.012;
+                n += 1;
+                if n >= max_syllables {
+                    break;
+                }
+            }
+            in_vowel = vowel;
+            match ch {
+                ' ' => t += 0.035,
+                ',' | ';' | '-' => t += 0.14,
+                '.' | '!' | '?' => t += 0.28,
+                _ => {}
+            }
+        }
+        self.busy_until = t + 4.0;
+    }
+
+    pub fn update(&mut self, now: f64, volume: f32) {
+        let due: Vec<usize> = self.queue.iter().filter(|q| q.0 <= now).map(|q| q.1).collect();
+        self.queue.retain(|q| q.0 > now);
+        for i in due {
+            audio::play_sfx(i, 0.75 * volume.max(0.0), 0.0);
+        }
+    }
+
+    pub fn stop(&mut self) {
+        self.queue.clear();
+    }
+}
+