Speaker ffi example

js/tones/speaker_api.js

@@ -0,0 +1,37 @@
+({
+    _acquired : false,
+    _acquire : ffi("int furi_hal_speaker_acquire(int)"),
+    start : ffi("void furi_hal_speaker_start(float, float)"),
+    stop : ffi("void furi_hal_speaker_stop()"),
+    _release : ffi("void furi_hal_speaker_release()"),
+    acquire : function(timeout) {
+      if (!this._acquired) {
+        this._acquired = this._acquire(timeout);
+      }
+      return this._acquired;
+    },
+    acquired : function() {
+      return this._acquired;
+    },
+    release : function() {
+      if (this._acquired) {
+        this._release();
+        this._acquired = false;
+      }
+    },
+    play : function(frequency, volume, duration) {
+      let already_acquired = this.acquired();
+      if (!already_acquired) {
+        this.acquire(1000);
+      };
+      if (this.acquired()) {
+        this.start(frequency, volume);
+        delay(duration);
+        this.stop();
+      }
+      if (!already_acquired) {
+        this.release();
+      }
+    },
+  }
+)