--- a/.hgignore	Tue Dec 13 07:14:41 2022 +0000
+++ b/.hgignore	Wed Dec 14 06:19:03 2022 +0000
@@ -30,5 +30,6 @@
 ^miscutil/gsm-amr2efr$
 ^miscutil/gsm-efr2amr$
 ^miscutil/gsmrec-dump$
+^miscutil/pcm16-raw2wav$
 
 ^pcap/rtp-gsmfr-extr$

--- a/miscutil/Makefile	Tue Dec 13 07:14:41 2022 +0000
+++ b/miscutil/Makefile	Wed Dec 14 06:19:03 2022 +0000
@@ -1,6 +1,6 @@
 CC=	gcc
 CFLAGS=	-O2
-PROGS=	gsm-amr2efr gsm-efr2amr gsmrec-dump
+PROGS=	gsm-amr2efr gsm-efr2amr gsmrec-dump pcm16-raw2wav
 LIBEFR=	../libgsmefr/libgsmefr.a
 LIBTEST=../libtest/libtest.a
 INSTBIN=/opt/freecalypso/bin
@@ -19,6 +19,9 @@
 gsmrec-dump:	gsmrec-dump.o ${LIBTEST} ${LIBEFR}
 	${CC} ${CFLAGS} -o $@ gsmrec-dump.o ${LIBTEST} ${LIBEFR} -lgsm
 
+pcm16-raw2wav:	raw2wav.o ${LIBTEST}
+	${CC} ${CFLAGS} -o $@ raw2wav.o ${LIBTEST}
+
 install:
 	mkdir -p ${INSTBIN}
 	install -c ${PROGS} ${INSTBIN}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/miscutil/raw2wav.c	Wed Dec 14 06:19:03 2022 +0000
@@ -0,0 +1,76 @@
+/*
+ * This program reads a 16-bit linear PCM speech recording in raw format
+ * (either BE or LE) and converts it into WAV container format.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include "../libtest/wavwriter.h"
+
+static void
+swap_bytes(bytes, cc)
+	uint8_t *bytes;
+	unsigned cc;
+{
+	uint8_t *dp, *endp;
+	int t;
+
+	dp = bytes;
+	endp = bytes + cc;
+	while (dp < endp) {
+		t = dp[0];
+		dp[0] = dp[1];
+		dp[1] = t;
+		dp += 2;
+	}
+}
+
+main(argc, argv)
+	char **argv;
+{
+	int big_endian;
+	FILE *binf;
+	void *wav;
+	uint8_t bytes[320];
+	int cc;
+
+	if (argc != 4) {
+usage:		fprintf(stderr, "usage: %s be|le input.raw output.wav\n",
+			argv[0]);
+		exit(1);
+	}
+	if (!strcmp(argv[1], "be"))
+		big_endian = 1;
+	else if (!strcmp(argv[1], "le"))
+		big_endian = 0;
+	else
+		goto usage;
+	binf = fopen(argv[2], "r");
+	if (!binf) {
+		perror(argv[2]);
+		exit(1);
+	}
+	wav = wav_write_open(argv[3], 8000, 16, 1);
+	if (!wav) {
+		perror(argv[3]);
+		exit(1);
+	}
+	for (;;) {
+		cc = fread(bytes, 1, sizeof bytes, binf);
+		if (cc <= 0)
+			break;
+		if (cc & 1) {
+			fprintf(stderr, "error: %s has odd number of bytes\n",
+				argv[2]);
+			exit(1);
+		}
+		if (big_endian)
+			swap_bytes(bytes, cc);
+		wav_write_data(wav, bytes, cc);
+	}
+	wav_write_close(wav);
+	exit(0);
+}