# HG changeset patch
# User Mychaela Falconia <falcon@freecalypso.org>
# Date 1713310867 0
# Node ID 39b3c24256aefc57d946ed9a829d44678349aab8
# Parent  17d8ff0944a85c93c6d2fb5b82f13ba5ad860929
pcmu2efr: add stdefr-diff sanity check

diff -r 17d8ff0944a8 -r 39b3c24256ae .hgignore
--- a/.hgignore	Tue Apr 16 23:31:32 2024 +0000
+++ b/.hgignore	Tue Apr 16 23:41:07 2024 +0000
@@ -9,6 +9,7 @@
 ^dmw/gen-dmw-bin$
 ^dmw/dmw-[au]law\.
 
+^pcmu2efr/stdefr-diff$
 ^pcmu2efr/stdefr-out$
 
 ^ringing/genring$
diff -r 17d8ff0944a8 -r 39b3c24256ae pcmu2efr/Makefile
--- a/pcmu2efr/Makefile	Tue Apr 16 23:31:32 2024 +0000
+++ b/pcmu2efr/Makefile	Tue Apr 16 23:41:07 2024 +0000
@@ -1,11 +1,15 @@
 CC=	gcc
 CFLAGS=	-O2
-PROGS=	stdefr-out
+PROGS=	stdefr-diff stdefr-out
 
 STDEFR_OBJS=	gen-efr.o gen160.o seqsyncu.o stdefr-out.o ulaw-expand.o
+STDEFRD_OBJS=	gen-efr.o gen160.o seqsyncu.o stdefr-diff.o ulaw-expand.o
 
 all:	${PROGS}
 
+stdefr-diff:	${STDEFRD_OBJS}
+	${CC} ${CFLAGS} -o $@ ${STDEFRD_OBJS} -lgsmefr
+
 stdefr-out:	${STDEFR_OBJS}
 	${CC} ${CFLAGS} -o $@ ${STDEFR_OBJS} -lgsmefr
 
diff -r 17d8ff0944a8 -r 39b3c24256ae pcmu2efr/stdefr-diff.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pcmu2efr/stdefr-diff.c	Tue Apr 16 23:41:07 2024 +0000
@@ -0,0 +1,30 @@
+/*
+ * This program computes 160 possible EFR encoder outputs using standard EFR,
+ * and then does a diff among them, seeking to verify that they are all
+ * distinct.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+
+extern uint8_t standard_efr[160][31];
+
+main(argc, argv)
+	char **argv;
+{
+	unsigned m, n;
+
+	generate_linear_inputs();
+	generate_std_efr();
+	for (m = 0; m < 159; m++) {
+		for (n = m + 1; n < 160; n++) {
+			if (!memcmp(standard_efr[m], standard_efr[n], 31))
+				printf("Bad: sequences #%u and #%u are equal\n",
+					m, n);
+		}
+	}
+	exit(0);
+}