--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/efrtest/etsi-enc-common.c	Wed May 08 01:13:50 2024 +0000
@@ -0,0 +1,78 @@
+/*
+ * This C module holds some functions that have been split off from
+ * etsi-enc.c, with the goal of making it easier to build both
+ * standard-EFR and AMR-EFR versions of the ETSI-format EFR encoder.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include "../libgsmefr/gsm_efr.h"
+
+read_input(inf, pcm, filename_for_errs, big_endian)
+	FILE *inf;
+	int16_t *pcm;
+	char *filename_for_errs;
+{
+	uint8_t file_bytes[320], *sp;
+	int cc;
+	unsigned n;
+
+	cc = fread(file_bytes, 2, 160, inf);
+	if (cc == 0)
+		return 0;
+	if (cc != 160) {
+		fprintf(stderr, "error: short read from %s\n",
+			filename_for_errs);
+		exit(1);
+	}
+	sp = file_bytes;
+	for (n = 0; n < 160; n++) {
+		if (big_endian)
+			pcm[n] = (sp[0] << 8) | sp[1];
+		else
+			pcm[n] = sp[0] | (sp[1] << 8);
+		sp += 2;
+	}
+	return 1;
+}
+
+void
+frame2bits(frame, bits)
+	uint8_t *frame, *bits;
+{
+	unsigned nb, byte, mask, bit;
+
+	for (nb = 0; nb < EFR_RTP_FRAME_LEN; nb++) {
+		byte = *frame++;
+		for (mask = 0x80; mask; mask >>= 1) {
+			if (byte & mask)
+				bit = 1;
+			else
+				bit = 0;
+			*bits++ = bit;
+		}
+	}
+}
+
+void
+emit_output(outf, bits, nbits, big_endian)
+	FILE *outf;
+	uint8_t *bits;
+	unsigned nbits;
+{
+	unsigned n;
+
+	for (n = 0; n < nbits; n++) {
+		if (big_endian) {
+			putc(0, outf);
+			putc(bits[n], outf);
+		} else {
+			putc(bits[n], outf);
+			putc(0, outf);
+		}
+	}
+}