Merge branch 'bugfix/a2dp_source_app_state_error_v4.4' into 'release/…

…v4.4'

bt: Fixed the issue that the a2dp source would not send the media start command due to the connection initiated by the peer device(v4.4)

See merge request espressif/esp-idf!23555

examples/bluetooth/bluedroid/classic_bt/a2dp_source/main/main.c

@@ -320,7 +320,8 @@ static void bt_av_hdl_stack_evt(uint16_t event, void *p_param)
         esp_a2d_register_callback(&bt_app_a2d_cb);
         esp_a2d_source_register_data_callback(bt_app_a2d_data_cb);
 
-        esp_bt_gap_set_scan_mode(ESP_BT_CONNECTABLE, ESP_BT_GENERAL_DISCOVERABLE);
+        /* Avoid the state error of s_a2d_state caused by the connection initiated by the peer device. */
+        esp_bt_gap_set_scan_mode(ESP_BT_NON_CONNECTABLE, ESP_BT_NON_DISCOVERABLE);
 
         ESP_LOGI(BT_AV_TAG, "Starting device discovery...");
         s_a2d_state = APP_AV_STATE_DISCOVERING;
@@ -432,7 +433,6 @@ static void bt_app_av_state_connecting_hdlr(uint16_t event, void *param)
             ESP_LOGI(BT_AV_TAG, "a2dp connected");
             s_a2d_state =  APP_AV_STATE_CONNECTED;
             s_media_state = APP_AV_MEDIA_STATE_IDLE;
-            esp_bt_gap_set_scan_mode(ESP_BT_NON_CONNECTABLE, ESP_BT_NON_DISCOVERABLE);
         } else if (a2d->conn_stat.state == ESP_A2D_CONNECTION_STATE_DISCONNECTED) {
             s_a2d_state =  APP_AV_STATE_UNCONNECTED;
         }
@@ -539,7 +539,6 @@ static void bt_app_av_state_connected_hdlr(uint16_t event, void *param)
         if (a2d->conn_stat.state == ESP_A2D_CONNECTION_STATE_DISCONNECTED) {
             ESP_LOGI(BT_AV_TAG, "a2dp disconnected");
             s_a2d_state = APP_AV_STATE_UNCONNECTED;
-            esp_bt_gap_set_scan_mode(ESP_BT_CONNECTABLE, ESP_BT_GENERAL_DISCOVERABLE);
         }
         break;
     }
@@ -576,7 +575,6 @@ static void bt_app_av_state_disconnecting_hdlr(uint16_t event, void *param)
         if (a2d->conn_stat.state == ESP_A2D_CONNECTION_STATE_DISCONNECTED) {
             ESP_LOGI(BT_AV_TAG, "a2dp disconnected");
             s_a2d_state =  APP_AV_STATE_UNCONNECTED;
-            esp_bt_gap_set_scan_mode(ESP_BT_CONNECTABLE, ESP_BT_GENERAL_DISCOVERABLE);
         }
         break;
     }