--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test-voice/user_cmd.c	Sun Mar 03 23:20:19 2024 -0800
@@ -0,0 +1,102 @@
+/*
+ * In this module we implement stdin command handling, supporting
+ * user-initiated CANCEL and BYE as well as TFO testing commands.
+ */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+
+static void
+pcm_fill_cmd(arg)
+	char *arg;
+{
+	char *cp;
+	unsigned octet;
+
+	for (cp = arg; isspace(*cp); cp++)
+		;
+	if (!isxdigit(*cp)) {
+inv_syntax:	fprintf(stderr, "error: pcm-fill command invalid syntax\n");
+		return;
+	}
+	octet = strtoul(cp, &cp, 16);
+	if (*cp)
+		goto inv_syntax;
+	if (octet > 0xFF) {
+		fprintf(stderr,
+			"error: pcm-fill octet argument out of range\n");
+		return;
+	}
+	set_pcm_fill_octet(octet);
+}
+
+static void
+tfo_req_cmd(args)
+	char *args;
+{
+	char *cp;
+	unsigned sig, codec;
+
+	for (cp = args; isspace(*cp); cp++)
+		;
+	if (!isdigit(*cp)) {
+inv_syntax:	fprintf(stderr, "error: tfo-req command invalid syntax\n");
+		return;
+	}
+	sig = strtoul(cp, &cp, 0);
+	if (!isspace(*cp))
+		goto inv_syntax;
+	if (sig > 0xFF) {
+		fprintf(stderr, "error: Sig argument out of range\n");
+		return;
+	}
+	while (isspace(*cp))
+		cp++;
+	if (!isdigit(*cp))
+		goto inv_syntax;
+	codec = strtoul(cp, &cp, 0);
+	if (*cp && !isspace(*cp))
+		goto inv_syntax;
+	if (codec > 14) {
+		fprintf(stderr, "error: Codec_Type argument out of range\n");
+		return;
+	}
+	while (isspace(*cp))
+		cp++;
+	if (*cp)
+		goto inv_syntax;
+	send_tfo_req(sig, codec);
+}
+
+void
+select_stdin()
+{
+	char buf[256], *cp;
+
+	fgets(buf, sizeof buf, stdin);
+	cp = index(buf, '\n');
+	if (cp) {
+		while (cp > buf && isspace(cp[-1]))
+			cp--;
+		*cp = '\0';
+	}
+	for (cp = buf; isspace(*cp); cp++)
+		;
+	if (!*cp)
+		return;
+	if (!strcmp(cp, "b") || !strcasecmp(cp, "bye"))
+		send_bye_req();
+	else if (!strcmp(cp, "c") || !strcasecmp(cp, "cancel"))
+		send_cancel_req();
+	else if (!strncmp(cp, "pcm-fill", 8) && isspace(cp[8]))
+		pcm_fill_cmd(cp + 9);
+	else if (!strncmp(cp, "tfo-req", 7) && isspace(cp[7]))
+		tfo_req_cmd(cp + 8);
+	else if (!strcmp(cp, "tfo-stop"))
+		stop_tfo_out();
+	else
+		fprintf(stderr, "error: non-understood stdin command\n");
+}