v0.1.0 initial commit

audio/pipewire_linux.go

@@ -0,0 +1,53 @@
+//go:build linux
+
+package audio
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+)
+
+// pwEngine plays pre-rendered WAVs by spawning pw-play per effect
+type pwEngine struct {
+	dir   string
+	files [EffectCount]string
+}
+
+// NewEngine synthesizes effect WAVs into a temp dir. Falls back to a silent
+// engine when pw-play is unavailable — game remains playable without audio
+func NewEngine() Engine {
+	if _, err := exec.LookPath("pw-play"); err != nil {
+		return nullEngine{}
+	}
+	dir, err := os.MkdirTemp("", "symph-sfx-")
+	if err != nil {
+		return nullEngine{}
+	}
+	e := &pwEngine{dir: dir}
+	for fx := EffectNone + 1; fx < EffectCount; fx++ {
+		path := filepath.Join(dir, fmt.Sprintf("fx-%d.wav", fx))
+		if err := os.WriteFile(path, wavBytes(synth(effectSegs[fx])), 0o644); err != nil {
+			os.RemoveAll(dir)
+			return nullEngine{}
+		}
+		e.files[fx] = path
+	}
+	return e
+}
+
+// Play spawns pw-play detached; process reaped asynchronously
+func (e *pwEngine) Play(fx Effect) {
+	if fx == EffectNone || fx >= EffectCount || e.files[fx] == "" {
+		return
+	}
+	cmd := exec.Command("pw-play", "--volume", "0.7", e.files[fx])
+	if err := cmd.Start(); err == nil {
+		go cmd.Wait()
+	}
+}
+
+func (e *pwEngine) Close() {
+	os.RemoveAll(e.dir)
+}