viterbi: fixed incorrect initialization

srslte/lib/fec/viterbi37_port.c

@@ -33,13 +33,25 @@ struct v37 {
   decision_t *dp; /* Pointer to current decision */
   metric_t *old_metrics, *new_metrics; /* Pointers to path metrics, swapped on every bit */
   decision_t *decisions; /* Beginning of decisions for block */
+  uint32_t len; 
 };
 
+void clear_v37(struct v37 *vp) {
+  bzero(vp->decisions, sizeof(decision_t)*vp->len);
+  vp->dp = NULL; 
+  bzero(&vp->metrics1, sizeof(metric_t));
+  bzero(&vp->metrics2, sizeof(metric_t));
+  vp->old_metrics = NULL; 
+  vp->new_metrics = NULL; 
+}
+
 /* Initialize Viterbi decoder for start of new frame */
 int init_viterbi37_port(void *p, int starting_state) {
   struct v37 *vp = p;
   uint32_t i;
   
+  clear_v37(vp);
+  
   if (p == NULL)
     return -1;
   for (i = 0; i < 64; i++)
@@ -82,6 +94,8 @@ void *create_viterbi37_port(int polys[3], uint32_t len) {
     return NULL ;
   }
   
+  vp->len = len+6; 
+
   return vp;
 }
 

srslte/lib/fec/viterbi37_sse.c

@@ -42,6 +42,7 @@ struct v37 {
   decision_t *dp; /* Pointer to current decision */
   metric_t *old_metrics,*new_metrics; /* Pointers to path metrics, swapped on every bit */
   decision_t *decisions; /* Beginning of decisions for block */
+  uint32_t len; 
 };
 
 void set_viterbi37_polynomial_sse(int polys[3]) {
@@ -54,12 +55,23 @@ void set_viterbi37_polynomial_sse(int polys[3]) {
   }
 }
 
+void clear_v37_sse(struct v37 *vp) {
+  bzero(vp->decisions, sizeof(decision_t)*vp->len);
+  vp->dp = NULL; 
+  bzero(&vp->metrics1, sizeof(metric_t));
+  bzero(&vp->metrics2, sizeof(metric_t));
+  vp->old_metrics = NULL; 
+  vp->new_metrics = NULL; 
+}
+
 
 /* Initialize Viterbi decoder for start of new frame */
 int init_viterbi37_sse(void *p, int starting_state) {
   struct v37 *vp = p;
   uint32_t i;
 
+  clear_v37_sse(vp);
+  
   for(i=0;i<64;i++)
     vp->metrics1.c[i] = 63;
 
@@ -89,6 +101,7 @@ void *create_viterbi37_sse(int polys[3], uint32_t len) {
     return NULL;
   }
   vp->decisions = (decision_t *)p;
+  vp->len = len+6;
   return vp;
 }