tweak BT + start to add AirPlay

components/airplay/airplay_sink.h

@@ -0,0 +1,22 @@
+/*
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+#ifndef __AIRPLAY_SINK_H__
+#define __AIRPLAY_SINK_H__
+
+#include <stdint.h>
+
+//typedef enum { 	BT_SINK_CONNECTED, BT_SINK_DISCONNECTED, BT_SINK_PLAY, BT_SINK_STOP, BT_SINK_PAUSE, 
+				//BT_SINK_RATE, BT_SINK_VOLUME,  } bt_sink_cmd_t;
+
+/**
+ * @brief     init sink mode (need to be provided)
+ */
+void airplay_sink_init(void);
+
+#endif /* __AIRPLAY_SINK_H__*/