add usrp_lib_config.c for USRP device configuration (record player)

targets/ARCH/USRP/USERSPACE/LIB/usrp_lib_config.c

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+/** usrp_lib_config.c
+ *
+ * \author: HongliangXU : hong-liang-xu@agilent.com
+ */
+
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/sysinfo.h>
+#include <sys/resource.h>
+#include "common/utils/LOG/log.h"
+#include "assertions.h"
+#include "common_lib.h"
+#include "usrp_lib.h"
+
+
+int read_usrpconfig(uint32_t *recplay_mode, recplay_state_t **recplay_state) {
+unsigned int    u_sf_record = 0;                       // record mode
+unsigned int    u_sf_replay = 0;                       // replay mode
+uint32_t enable_recplay;
+
+    paramdef_t usrp_params[] = USRP_DEVICE_PARAMS_DESC;
+    config_get(usrp_params,sizeof(usrp_params)/sizeof(paramdef_t),USRP_SECTION);
+    if (enable_recplay) {
+      *recplay_state = calloc(sizeof(recplay_state_t),1);      
+      paramdef_t usrp_recplay_params[]=USRP_RECPLAY_PARAMS_DESC ;
+      struct sysinfo systeminfo;
+ 
+    // Use mmap for IQ files for systems with less than 6GB total RAM
+      sysinfo(&systeminfo);
+
+      if (systeminfo.totalram < 6144000000) {
+        (*recplay_state)->use_mmap = 0;
+      } else {
+        (*recplay_state)->use_mmap = 1;
+      }
+
+      memset((*recplay_state)->u_sf_filename, 0, 1024);
+      config_get(usrp_recplay_params,sizeof(usrp_recplay_params)/sizeof(paramdef_t),USRP_RECPLAY_SECTION);
+
+      if (strlen((*recplay_state)->u_sf_filename) == 0) {
+        (void) strcpy((
+        	*recplay_state)->u_sf_filename, DEF_SF_FILE);
+      }
+    } /* record player enabled */
+    if (u_sf_replay == 1) *recplay_mode = RECPLAY_REPLAYMODE;
+
+    if (u_sf_record == 1) *recplay_mode = RECPLAY_RECORDMODE;
+
+
+    return 0;
+  }
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