From 1bc1dfc1abf71795c43fe7abb2db487a70c524b2 Mon Sep 17 00:00:00 2001
From: Nebuleon Fumika
Date: Thu, 17 Jan 2013 18:52:48 -0500
Subject: Reinstate the interrupt time setting.

This reverts commit 27d2911fb09ad81849c5df1958143c6878589450.
---
 source/nds/ds2sound.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'source/nds')

diff --git a/source/nds/ds2sound.h b/source/nds/ds2sound.h
index f51a6e1..d8cfe09 100644
--- a/source/nds/ds2sound.h
+++ b/source/nds/ds2sound.h
@@ -5,6 +5,20 @@
 #define DS2_BUFFER_SIZE_6 1024 /* tested working, slow because of upsampling */
 #define DS2_BUFFER_SIZE_7 1024 /* tested working, slow because of upsampling */
 
+// In microseconds.
+// (512 samples / 22050 samples/sec) = 23000 microseconds.
+// The value needs to be:
+// * not too low, because then every time a new batch of close to 512 samples
+//   is created anew, and that's EXPENSIVE.
+// * not too high, because then missing the end of the buffer creates audible
+//   underflows.
+// * not exactly 16667 (NTSC 60 FPS) or 20000 (PAL 50 FPS), because then
+//   the automatic frame skipper will be extremely messed up.
+#define INTERRUPT_TIME_4 15360 /* 15360 tested working */
+#define INTERRUPT_TIME_5  8000 /* like the SNES! tested working, but slow */
+#define INTERRUPT_TIME_6  4000 /* tested working, slow because of upsampling */
+#define INTERRUPT_TIME_7  4000 /* tested working, slow because of upsampling */
+
 // The sampling rate for the sound, in Hz, for each value of
 // Settings.SoundPlaybackRate.
 #define SND_SAMPLE_RATE_1 8000
@@ -16,6 +30,7 @@
 #define SND_SAMPLE_RATE_7 48000
 
 // Settings in use. The number should match in all three settings.
+#define INTERRUPT_TIME    INTERRUPT_TIME_4
 #define DS2_BUFFER_SIZE   DS2_BUFFER_SIZE_4
 #define SND_SAMPLE_RATE   SND_SAMPLE_RATE_4
 #define SNES9X_SRATE_ID   4
-- 
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