feat: add event

opt_device.go

@@ -1,7 +1,17 @@
 package acp
 
 type deviceOption struct {
-	linear bool
+	linear  bool
+	threads int
+}
+
+func (do *deviceOption) check() {
+	if do.threads == 0 {
+		do.threads = 8
+	}
+	if do.linear {
+		do.threads = 1
+	}
 }
 
 type DeviceOption func(*deviceOption) *deviceOption
@@ -12,3 +22,10 @@ func LinearDevice(b bool) DeviceOption {
 		return d
 	}
 }
+
+func DeviceThreads(threads int) DeviceOption {
+	return func(d *deviceOption) *deviceOption {
+		d.threads = threads
+		return d
+	}
+}