add websocket protocol

main/protocol.cc

@@ -0,0 +1,21 @@
+#include "protocol.h"
+
+#include <esp_log.h>
+
+#define TAG "Protocol"
+
+void Protocol::OnIncomingJson(std::function<void(const cJSON* root)> callback) {
+    on_incoming_json_ = callback;
+}
+
+void Protocol::OnIncomingAudio(std::function<void(const std::string& data)> callback) {
+    on_incoming_audio_ = callback;
+}
+
+void Protocol::OnAudioChannelOpened(std::function<void()> callback) {
+    on_audio_channel_opened_ = callback;
+}
+
+void Protocol::OnAudioChannelClosed(std::function<void()> callback) {
+    on_audio_channel_closed_ = callback;
+}