--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/amrdiff/readone-efr.c	Wed Apr 03 20:07:50 2024 +0000
@@ -0,0 +1,45 @@
+/*
+ * This program reads a single frame (the first one) from an EFR *.cod file
+ * and emits this frame of 244 bits as comma-separated ASCII.  The intent is
+ * to extract the DHF in a form convenient for inclusion in amrdiff source.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include "etsi.h"
+
+main(argc, argv)
+	char **argv;
+{
+	char *filename;
+	int bigend, rc;
+	FILE *inf;
+	uint8_t efr_bits[ETSI_ENC_NWORDS];
+
+	if (argc != 3) {
+usage:		fprintf(stderr, "usage: %s efr-cod-file be|le\n", argv[0]);
+		exit(1);
+	}
+	filename = argv[1];
+	if (!strcmp(argv[2], "be"))
+		bigend = 1;
+	else if (!strcmp(argv[2], "le"))
+		bigend = 0;
+	else
+		goto usage;
+	inf = fopen(filename, "r");
+	if (!inf) {
+		perror(filename);
+		exit(1);
+	}
+	rc = read_etsi_bits(inf, bigend, efr_bits, ETSI_ENC_NWORDS, filename);
+	if (!rc) {
+		fprintf(stderr, "error: %s is empty\n", filename);
+		exit(1);
+	}
+	emit_frame244(efr_bits);
+	exit(0);
+}