Configurable interrupt interval for the sound timer. Right now, only 22050 Hz audio at 2000-microsecond intervals works.

2 files changed, 10 insertions, 8 deletions

diff --git a/source/nds/ds2sound.h b/source/nds/ds2sound.h
index 089afb6..b901939 100644
--- a/source/nds/ds2sound.h
+++ b/source/nds/ds2sound.h
@@ -1,12 +1,11 @@
 // The sound buffer sizes used on the DS2's side, for each value of
 // Settings.SoundPlaybackRate.
-#define DS2_BUFFER_SIZE_1 256
-#define DS2_BUFFER_SIZE_2 256
-#define DS2_BUFFER_SIZE_3 256
-#define DS2_BUFFER_SIZE_4 512
-#define DS2_BUFFER_SIZE_5 512
-#define DS2_BUFFER_SIZE_6 1024
-#define DS2_BUFFER_SIZE_7 1024
+#define DS2_BUFFER_SIZE_4  512 /* tested working */
+// Others don't work, or don't work well.
+
+// In microseconds.
+#define INTERRUPT_TIME_4  2000 /* tested working */
+// Others don't work, or don't work well.
 
 // The sampling rate for the sound, in Hz, for each value of
 // Settings.SoundPlaybackRate.
@@ -19,6 +18,7 @@
 #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
diff --git a/source/nds/entry.cpp b/source/nds/entry.cpp
index f14c917..a666a0b 100644
--- a/source/nds/entry.cpp
+++ b/source/nds/entry.cpp
@@ -538,7 +538,7 @@ int sfc_main (int argc, char **argv)
                   Settings.SoundBufferSize);
 	// Start a timer for the sound
 	initTimer(0 /* timer channel, 0 or 1 */,
-	          2000 /* period in microseconds */,
+	          INTERRUPT_TIME /* period in microseconds */,
 	          NDSSFCProduceSound /* timer function, void (unsigned int) */,
 	          0 /* programmer-specified argument to ^ */);
 	runTimer(0 /* timer channel, 0 or 1 */);
@@ -1157,6 +1157,8 @@ void NDSSFCProduceSound (unsigned int unused)
 		/* All data sent. */
 	}
 
+	IsSoundGenerated = FALSE;
+
 	so.samples_mixed_so_far -= sample_count;
 }