--- a/mtctest/rtp_play.c	Sun Jun 09 04:24:53 2024 +0000
+++ b/mtctest/rtp_play.c	Sun Jun 09 04:32:57 2024 +0000
@@ -77,8 +77,8 @@
 
 void
 play_file_cmdop(filename, frame_len, loop)
+	char *filename;
 	unsigned frame_len;
-	char *filename;
 {
 	int fd;
 	struct stat st;

--- a/mtctest/user_cmd.c	Sun Jun 09 04:24:53 2024 +0000
+++ b/mtctest/user_cmd.c	Sun Jun 09 04:32:57 2024 +0000
@@ -1,7 +1,7 @@
 /*
- * In this module we implement stdin command handling: we start with
- * 'disc' command for caller-initiated disconnect, and then we'll add
- * play commands for RTP output.
+ * In this module we implement stdin command handling: 'disc' command
+ * for caller-initiated disconnect; 'play' and 'play-stop' commands
+ * for RTP output.
  */
 
 #include <ctype.h>
@@ -10,6 +10,47 @@
 #include <string.h>
 #include <strings.h>
 
+static void
+play_cmd(args)
+	char *args;
+{
+	char *cp, *filename;
+	unsigned frame_len;
+	int loop;
+
+	for (cp = args; isspace(*cp); cp++)
+		;
+	if (!*cp) {
+inv_syntax:	fprintf(stderr, "error: play command invalid syntax\n");
+		return;
+	}
+	for (filename = cp; *cp && !isspace(*cp); cp++)
+		;
+	if (!*cp)
+		goto inv_syntax;
+	*cp++ = '\0';
+	while (isspace(*cp))
+		cp++;
+	if (!isdigit(*cp))
+		goto inv_syntax;
+	frame_len = strtoul(cp, &cp, 0);
+	if (*cp && !isspace(*cp))
+		goto inv_syntax;
+	if (frame_len < 1 || frame_len > 160) {
+		fprintf(stderr, "error: frame length argument out of range\n");
+		return;
+	}
+	while (isspace(*cp))
+		cp++;
+	if (*cp) {
+		if (strcmp(cp, "loop"))
+			goto inv_syntax;
+		loop = 1;
+	} else
+		loop = 0;
+	play_file_cmdop(filename, frame_len, loop);
+}
+
 void
 select_stdin()
 {
@@ -28,6 +69,10 @@
 		return;
 	if (!strcmp(cp, "disc"))
 		disconnect_command();
+	else if (!strncmp(cp, "play", 4) && isspace(cp[4]))
+		play_cmd(cp + 5);
+	else if (!strcmp(cp, "play-stop"))
+		play_file_stop();
 	else
 		fprintf(stderr, "error: non-understood stdin command\n");
 }