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libs/libcodec2/unittest/create_interleaver.c

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+/*
+  create_interleaver.c
+  David Rowe
+  May 27 2012
+
+  Creates an interleaver for Codec 2.
+*/
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+int main(int argc, char * argv[]) {
+    int   m,i, src_bit, dest_bit;
+    FILE *f;
+    int  *interleaver;
+    
+    if (argc != 3) {
+	printf("usage: %s InterleaverBits InterleaverFile\n", argv[0]);
+	exit(1);
+    }
+
+    m = atoi(argv[1]);
+    f = fopen(argv[2],"wt");
+    assert(f != NULL);
+
+
+    interleaver = (int*)malloc(m*sizeof(int));
+    assert(interleaver != NULL);
+    for(i=0; i<m; i++)
+	interleaver[i] = -1;
+
+    src_bit = 0;
+    while(src_bit != m) {
+	dest_bit = ((float)rand()/RAND_MAX)*m;
+	if (interleaver[dest_bit] == -1) {
+	    interleaver[dest_bit] = src_bit;
+	    src_bit++;
+	}
+    }
+
+    for(i=0; i<m; i++) {
+	fprintf(f, "%d\n", interleaver[i]);
+    }
+
+    fclose(f);
+    return 0;
+}