add text output capabilities to filesink

lib/include/srslte/phy/io/format.h

@@ -23,6 +23,7 @@
 #define SRSLTE_FORMAT_H
 
 typedef enum {
+  SRSLTE_TEXT,
   SRSLTE_FLOAT, 
   SRSLTE_COMPLEX_FLOAT, 
   SRSLTE_COMPLEX_SHORT, 

lib/src/phy/io/filesink.c

@@ -53,6 +53,9 @@ int srslte_filesink_write(srslte_filesink_t *q, void *buffer, int nsamples) {
   int size;
 
   switch(q->type) {
+  case SRSLTE_TEXT:
+    fprintf(q->f, "%s",(char *)buffer);
+    break;
   case SRSLTE_FLOAT:
     for (i=0;i<nsamples;i++) {
       fprintf(q->f,"%g\n",fbuf[i]);