Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
14352 changed files with 3176737 additions and 0 deletions
@@ -0,0 +1,57 @@
+/* Include file to configure the RS codec for integer symbols
+ *
+ * Copyright 2002, Phil Karn, KA9Q
+ * May be used under the terms of the GNU General Public License (GPL)
+ */
+#define DTYPE int
+
+/* Reed-Solomon codec control block */
+struct rs {
+  int mm;              /* Bits per symbol */
+  int nn;              /* Symbols per block (= (1<<mm)-1) */
+  DTYPE *alpha_to;     /* log lookup table */
+  DTYPE *index_of;     /* Antilog lookup table */
+  DTYPE *genpoly;      /* Generator polynomial */
+  int nroots;     /* Number of generator roots = number of parity symbols */
+  int fcr;        /* First consecutive root, index form */
+  int prim;       /* Primitive element, index form */
+  int iprim;      /* prim-th root of 1, index form */
+  int pad;        /* Padding bytes in shortened block */
+};
+
+static int modnn(struct rs *rs,int x){
+  while (x >= rs->nn) {
+    x -= rs->nn;
+    x = (x >> rs->mm) + (x & rs->nn);
+  }
+  return x;
+}
+#define MODNN(x) modnn(rs,x)
+
+#define MM (rs->mm)
+#define NN (rs->nn)
+#define ALPHA_TO (rs->alpha_to) 
+#define INDEX_OF (rs->index_of)
+#define GENPOLY (rs->genpoly)
+//#define NROOTS (rs->nroots)
+#define NROOTS (51)
+#define FCR (rs->fcr)
+#define PRIM (rs->prim)
+#define IPRIM (rs->iprim)
+#define PAD (rs->pad)
+#define A0 (NN)
+
+#define ENCODE_RS encode_rs_int
+#define DECODE_RS decode_rs_int
+#define INIT_RS init_rs_int
+#define FREE_RS free_rs_int
+
+void ENCODE_RS(void *p,DTYPE *data,DTYPE *parity);
+int DECODE_RS(void *p,DTYPE *data,int *eras_pos,int no_eras);
+void *INIT_RS(int symsize,int gfpoly,int fcr,
+		   int prim,int nroots,int pad);
+void FREE_RS(void *p);
+
+
+
+