don't crash on bad timing

[picodrive.git] / pico / sound / sound.c

diff --git a/pico/sound/sound.c b/pico/sound/sound.c
index 615e324..1f23e1a 100644 (file)
--- a/pico/sound/sound.c
+++ b/pico/sound/sound.c
@@ -1,11 +1,11 @@
-// This is part of Pico Library\r
-\r
-// (c) Copyright 2004 Dave, All rights reserved.\r
-// (c) Copyright 2006,2007 notaz, All rights reserved.\r
-// Free for non-commercial use.\r
-\r
-// For commercial use, separate licencing terms must be obtained.\r
-\r
+/*\r
+ * PicoDrive\r
+ * (c) Copyright Dave, 2004\r
+ * (C) notaz, 2006-2009\r
+ *\r
+ * This work is licensed under the terms of MAME license.\r
+ * See COPYING file in the top-level directory.\r
+ */\r
 \r
 #include <string.h>\r
 #include "ym2612.h"\r
@@ -181,6 +181,9 @@ PICO_INTERNAL void PsndDoDAC(int line_to)
   int dout = ym2612.dacout;\r
   int line_from = PsndDacLine;\r
 \r
+  if (line_to >= 312)\r
+    line_to = 311;\r
+\r
   PsndDacLine = line_to + 1;\r
 \r
   pos =dac_info[line_from]>>4;\r
@@ -337,6 +340,7 @@ static int PsndRender(int offset, int length)
     memset32(buf32, 0, length<<stereo);\r
 \r
 //printf("active_chs: %02x\n", buf32_updated);\r
+  (void)buf32_updated;\r
 \r
   // CD: PCM sound\r
   if (do_pcm) {\r