Add audio output to GUI

applications/gui2/src/modules/camera.cpp

@@ -33,9 +33,15 @@ void Camera::activate(int idx) {
 
 	filter = io->feed()->filter({Channel::Left, Channel::Right, Channel::Depth});
 	filter->on(
-		[this](ftl::data::FrameSetPtr fs){
+		[this, speaker = io->speaker()](ftl::data::FrameSetPtr fs){
 			if (paused || !view) { return true; }
 			std::atomic_store(&active_fs, fs);
+
+			// Deal with audio
+			if (fs->frames[source_idx].hasOwn(ftl::codecs::Channel::AudioStereo)) {
+				speaker->queue(fs->timestamp(), fs->frames[source_idx]);
+			}
+
 			view->fview->set(fs, source_idx, channel);
 			screen->redraw();
 			return true;