diff --git a/include/hardware/bt_av.h b/include/hardware/bt_av.h
index 5252a17..5f7601e 100644
--- a/include/hardware/bt_av.h
+++ b/include/hardware/bt_av.h
@@ -38,13 +38,13 @@
 /** Callback for connection state change.
  *  state will have one of the values from btav_connection_state_t
  */
-typedef void (* btav_connection_state_callback)(btav_connection_state_t state, 
+typedef void (* btav_connection_state_callback)(btav_connection_state_t state,
                                                     bt_bdaddr_t *bd_addr);
 
 /** Callback for audiopath state change.
  *  state will have one of the values from btav_audio_state_t
  */
-typedef void (* btav_audio_state_callback)(btav_audio_state_t state, 
+typedef void (* btav_audio_state_callback)(btav_audio_state_t state,
                                                bt_bdaddr_t *bd_addr);
 
 /** Callback for audio configuration change.
@@ -57,6 +57,13 @@
                                                 uint32_t sample_rate,
                                                 uint8_t channel_count);
 
+/*
+ * Callback for audio focus request to be used only in
+ * case of A2DP Sink. This is required because we are using
+ * AudioTrack approach for audio data rendering.
+ */
+typedef void (* btav_audio_focus_request_callback)(bt_bdaddr_t *bd_addr);
+
 /** BT-AV callback structure. */
 typedef struct {
     /** set to sizeof(btav_callbacks_t) */
@@ -64,17 +71,18 @@
     btav_connection_state_callback  connection_state_cb;
     btav_audio_state_callback audio_state_cb;
     btav_audio_config_callback audio_config_cb;
+    btav_audio_focus_request_callback audio_focus_request_cb;
 } btav_callbacks_t;
 
-/** 
+/**
  * NOTE:
  *
  * 1. AVRCP 1.0 shall be supported initially. AVRCP passthrough commands
- *    shall be handled internally via uinput 
+ *    shall be handled internally via uinput
  *
  * 2. A2DP data path shall be handled via a socket pipe between the AudioFlinger
  *    android_audio_hw library and the Bluetooth stack.
- * 
+ *
  */
 /** Represents the standard BT-AV interface.
  *  Used for both the A2DP source and sink interfaces.
@@ -96,6 +104,9 @@
 
     /** Closes the interface. */
     void  (*cleanup)( void );
+
+    /** Sends Audio Focus State. */
+    void  (*audio_focus_state)( int focus_state );
 } btav_interface_t;
 
 __END_DECLS
diff --git a/include/hardware/bt_rc.h b/include/hardware/bt_rc.h
index c565c48..1e2c293 100644
--- a/include/hardware/bt_rc.h
+++ b/include/hardware/bt_rc.h
@@ -103,6 +103,36 @@
     uint8_t attr_values[BTRC_MAX_APP_SETTINGS];
 } btrc_player_settings_t;
 
+typedef struct {
+    uint8_t   val;
+    uint16_t  charset_id;
+    uint16_t  str_len;
+    uint8_t   *p_str;
+} btrc_player_app_ext_attr_val_t;
+
+typedef struct {
+    uint8_t   attr_id;
+    uint16_t  charset_id;
+    uint16_t  str_len;
+    uint8_t   *p_str;
+    uint8_t   num_val;
+    btrc_player_app_ext_attr_val_t ext_attr_val[BTRC_MAX_APP_ATTR_SIZE];
+} btrc_player_app_ext_attr_t;
+
+typedef struct {
+    uint8_t attr_id;
+    uint8_t num_val;
+    uint8_t attr_val[BTRC_MAX_APP_ATTR_SIZE];
+} btrc_player_app_attr_t;
+
+typedef struct {
+    uint32_t start_item;
+    uint32_t end_item;
+    uint32_t size;
+    uint32_t attrs[BTRC_MAX_ELEM_ATTR_SIZE];
+    uint8_t  attr_count;
+} btrc_getfolderitem_t;
+
 typedef union
 {
     btrc_play_status_t play_status;
@@ -264,14 +294,53 @@
 
 typedef void (* btrc_passthrough_rsp_callback) (int id, int key_state);
 
+typedef void (* btrc_groupnavigation_rsp_callback) (int id, int key_state);
+
 typedef void (* btrc_connection_state_callback) (bool state, bt_bdaddr_t *bd_addr);
 
+typedef void (* btrc_ctrl_getrcfeatures_callback) (bt_bdaddr_t *bd_addr, int features);
+
+typedef void (* btrc_ctrl_setabsvol_cmd_callback) (bt_bdaddr_t *bd_addr, uint8_t abs_vol, uint8_t label);
+
+typedef void (* btrc_ctrl_registernotification_abs_vol_callback) (bt_bdaddr_t *bd_addr, uint8_t label);
+
+typedef void (* btrc_ctrl_setplayerapplicationsetting_rsp_callback) (bt_bdaddr_t *bd_addr,
+                                                                          uint8_t accepted);
+
+typedef void (* btrc_ctrl_playerapplicationsetting_callback)(bt_bdaddr_t *bd_addr,
+                                                                 uint8_t num_attr,
+                                                                 btrc_player_app_attr_t *app_attrs,
+                                                                 uint8_t num_ext_attr,
+                                                                 btrc_player_app_ext_attr_t *ext_attrs);
+
+typedef void (* btrc_ctrl_playerapplicationsetting_changed_callback)(bt_bdaddr_t *bd_addr,
+                                                                          btrc_player_settings_t *p_vals);
+
+typedef void (* btrc_ctrl_track_changed_callback)(bt_bdaddr_t *bd_addr, uint8_t num_attr,
+                                                     btrc_element_attr_val_t *p_attrs);
+
+typedef void (* btrc_ctrl_play_position_changed_callback)(bt_bdaddr_t *bd_addr,
+                                                              uint32_t song_len, uint32_t song_pos);
+
+typedef void (* btrc_ctrl_play_status_changed_callback)(bt_bdaddr_t *bd_addr,
+                                                            btrc_play_status_t play_status);
+
 /** BT-RC Controller callback structure. */
 typedef struct {
     /** set to sizeof(BtRcCallbacks) */
     size_t      size;
-    btrc_passthrough_rsp_callback               passthrough_rsp_cb;
-    btrc_connection_state_callback              connection_state_cb;
+    btrc_passthrough_rsp_callback                               passthrough_rsp_cb;
+    btrc_groupnavigation_rsp_callback                           groupnavigation_rsp_cb;
+    btrc_connection_state_callback                              connection_state_cb;
+    btrc_ctrl_getrcfeatures_callback                            getrcfeatures_cb;
+    btrc_ctrl_setplayerapplicationsetting_rsp_callback          setplayerappsetting_rsp_cb;
+    btrc_ctrl_playerapplicationsetting_callback                 playerapplicationsetting_cb;
+    btrc_ctrl_playerapplicationsetting_changed_callback         playerapplicationsetting_changed_cb;
+    btrc_ctrl_setabsvol_cmd_callback                            setabsvol_cmd_cb;
+    btrc_ctrl_registernotification_abs_vol_callback             registernotification_absvol_cb;
+    btrc_ctrl_track_changed_callback                            track_changed_cb;
+    btrc_ctrl_play_position_changed_callback                    play_position_changed_cb;
+    btrc_ctrl_play_status_changed_callback                      play_status_changed_cb;
 } btrc_ctrl_callbacks_t;
 
 /** Represents the standard BT-RC AVRCP Controller interface. */
@@ -285,7 +354,23 @@
     bt_status_t (*init)( btrc_ctrl_callbacks_t* callbacks );
 
     /** send pass through command to target */
-    bt_status_t (*send_pass_through_cmd) ( bt_bdaddr_t *bd_addr, uint8_t key_code, uint8_t key_state );
+    bt_status_t (*send_pass_through_cmd) (bt_bdaddr_t *bd_addr, uint8_t key_code,
+            uint8_t key_state );
+
+    /** send group navigation command to target */
+    bt_status_t (*send_group_navigation_cmd) (bt_bdaddr_t *bd_addr, uint8_t key_code,
+            uint8_t key_state );
+
+    /** send command to set player applicaiton setting attributes to target */
+    bt_status_t (*set_player_app_setting_cmd) (bt_bdaddr_t *bd_addr, uint8_t num_attrib,
+            uint8_t* attrib_ids, uint8_t* attrib_vals);
+
+    /** send rsp to set_abs_vol received from target */
+    bt_status_t (*set_volume_rsp) (bt_bdaddr_t *bd_addr, uint8_t abs_vol, uint8_t label);
+
+    /** send notificaiton rsp for abs vol to target */
+    bt_status_t (*register_abs_vol_rsp) (bt_bdaddr_t *bd_addr, btrc_notification_type_t rsp_type,
+            uint8_t abs_vol, uint8_t label);
 
     /** Closes the interface. */
     void  (*cleanup)( void );