From e53e2b40c18dd4c80a7e1960cf9200bbba8ef3d2 Mon Sep 17 00:00:00 2001
From: kichikuou <KichikuouChrome@gmail.com>
Date: Sun, 23 Apr 2017 19:35:03 +0900
Subject: [PATCH] Prevent busy loop by CDDA play time sync

---
 src/cdrom.emscripten.c | 3 +++
 src/nact.c             | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/src/cdrom.emscripten.c b/src/cdrom.emscripten.c
index 975748a..653416c 100644
--- a/src/cdrom.emscripten.c
+++ b/src/cdrom.emscripten.c
@@ -23,6 +23,8 @@
 #include "portab.h"
 #include "cdrom.h"
 
+int cdrom_getpos_count;
+
 static int  cdrom_init(char *);
 static int  cdrom_exit();
 static int  cdrom_start(int, boolean);
@@ -60,6 +62,7 @@ int cdrom_stop() {
 }
 
 int cdrom_getPlayingInfo(cd_time *info) {
+	cdrom_getpos_count++;
 	int t = EM_ASM_INT_V( return xsystem35.cdPlayer.getPosition(); );
 	info->t = t & 0xff;
 	FRAMES_TO_MSF(t >> 8, &info->m, &info->s, &info->f);
diff --git a/src/nact.c b/src/nact.c
index 4e2a046..b6525c7 100644
--- a/src/nact.c
+++ b/src/nact.c
@@ -185,10 +185,14 @@ static int checkMessage() {
 
 #ifdef __EMSCRIPTEN__
 
+extern int cdrom_getpos_count;
+
 static void mainloop() {
 	if (nact->is_quit)
 		emscripten_cancel_main_loop();
 
+	cdrom_getpos_count = 0;
+
 	for (int cnt = 0; cnt < 10000; cnt++) {
 		nact->input_state = InputNotChecked;
 
@@ -201,6 +205,8 @@ static void mainloop() {
 
 		if (nact->input_state == InputCheckMissed)
 			break;
+		if (cdrom_getpos_count >= 2)
+			break;
 	}
 	if (!nact->is_message_locked && nact->input_state == InputNotChecked)
 		sys_getInputInfo();